ML20235A163

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Forwards Design Handbook Providing Technical Info Re Matl Used to Form Valve Seat of Containment Pressurization & Vacuum Relief Isolation Valves in Response to Request Re 860221 Proposed Amends to Licenses DPR-39 & DPR-48
ML20235A163
Person / Time
Site: Zion  File:ZionSolutions icon.png
Issue date: 06/29/1987
From: Leblond P
COMMONWEALTH EDISON CO.
To:
NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
3266K, TAC-55417, TAC-55418, NUDOCS 8707080337
Download: ML20235A163 (33)
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Text

{{#Wiki_filter:-} Commrnwath Edison Ai One First National Plaza, Chicago, Illinois Address Reply to: Post Office Fox 767 V s' CNcago, Illinois 60690 0767 June: 29, 1987 U.S. Nuclear Regulatory Commission Attn: Document control Desk washington, DC 20555

Subject:

Zion Nuclear Powar Station Units 1 and 2 Proposed Amendment to Facility Operating License Nos. DP-39 & DP-48 NRC Docket Nos. 50-295 & 50-304 TAC Noss 55417 & 55418

Reference:

February 21, 1986 letter from p.C. LeBlond to H.R. Denton Gentlemen: The referenced letter transmitted a proposed amendment to Facility Operating License Nos. DPR-39 and DPR-48, Appendix A, Section 3.9 and 4.9 - Containment Isolation. Those proposed changes impose restri-tions on containment purge and vent operations and on the maximum purge valve position. Subsequent telecoriferences with J.A. Norris and other members of the NRC Staff have resulted in a need for additional information regarding the quality cf material used to form the valve seats for the containment pressurization and vacuum reliet isolation valves (AOV-kV0005 and AOV-RVG006). The enclosed design handbook provides detailed technical information regarding the material used to form the valve seat of the containment pressurization and vacuum reliuf isolation valves at Zion W Station. These valve seats are manufactured from TEFZEL produced by the DuPont Corporation. Valves containing this raaterial have been installed on Unit 1 in valves lAOV-RV0005 and 1AOV RV0006 during the Fall, 1986 refueling outage. These valves are anticipated to experience long lives due to the mild environment in which they have been installed. Temperatures and prest,ures are not severe during normal operation. The fluid media is air and fewer than 1b0 cycles are anticipated annually. These valves are also to be I installed on Unit 2 during the Fall, 1988 refueling outage. I i l 87070B0337 870629 ADOCK0500g5 DR I 0 0 kl =

, k A post installation test was performed on the Unit I valves during the Fall 1986 refueling outage. During this test each valve was individually subjected to a differeratia', pressure of 50 psig of air. No i leakage was detectede Any further questions arise regarding this matter please direct them to this office. Very truly yours, h P. C. LeBlond Nuclear Licensing Administrator l Enclosure cc: Resident Inspector Zion J. A. Norris - NRR I 3266K l 1 l 1 l l

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e w j 't I TABLE OF CONTENTS c Page 1 d Foreword 2 "T e t zel" New Design 'Fiexib!!ity 3 General Properties of "Telzel 6 Mechanical Properties 8 Strength and Stif f ness 8 Stress Strain in Tension and Compression 8 Other Elastic Property Data 11 Glass Fiber Orientation ir. Moided Structures . 11 Creep, Apparent Flex Modulus, and Lcng Term Strain . 12 Flex Fatigua 13 13 Impact Strength 13 Friction and Bearing Wear Thermal Properties 14 Temperature Rating 14 Tensite St;eagth vs. Time and Temperature . 14 Elongation.is. Time and Temperature 14 Heat Aging of Girss Reinforced Poiymer "Tefiel" 7oc-25 . 14 Loss of Weight with Aging 14 16 Miscellaneous Thermodynamic Data Flammability and Smoke.. 16 ..... 17 Environmental Properties. Lhemical Resistance . 17 Hydrolytic Stability and Water Absorptior . 20 . 20 Weather Resistance Effects of Radiation 20 Q' Corrns:vity with Metal. 22 Vatuum 0utgassing 22 Permeability i 22 Electrical Properties. . 22 ~ Optical Properties .. 23 Special Properties of Interest for Wire and Cable............ 23 Thermo mechanical Aging Tests............ . 23 Cut Through Resistance and Dielectric Strength...... . 25 i I . 25 Flame Tests on Wire . 25 Fabricating Techniques 25 Melt Processing........... Forming .. 25 . 25 Machining Coloring . 26 .. 26 Printing. S!:iping................. . 26 ....26 Assembly Techniques........ l Screw Assemblies........... . 26 Snap Fit . 26 Press Fit .. 26 .......26 Cold or Hot Heading.. . 26 Spin Welding..... .. 27 Ultrasonic Welding...... Potting.......... 27 ....27 Adhesive Bonding . 27 Heat Bonding...... . 28 i Safe Handling................ v. i l a w. e

e l Fareward "Tefzel"* Ouoropolymers are melt-processible thermo-plastics. They are part of the growing Du Pont family of i nuorine based products which includes " Teflon"** Trt. " Tenon" FEr and " Teflon" PFA nuorocarbon resins. This brochure presents design data for engineers and othert involved in materials selection and product design. It contains detailed information for the evalua-tion of "Tefzel"in electrical mechanical, and chenital applications. A vanety of natural and reinforced compositions re available, pernutting you to select resins based ort,, specific appheations or processing needs. A continuing program of resin development is being g conducted by Du Pont. For additional technical data, inf ormation about the current line of "Teft.el" compo-sitions or design assistance for a particular application, con tac t the appropriate Du Pont office hsted on the back einer. se l

  • Du Pont's registered tr ademark
  • Du Porit's regrstered trademark e

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i O "Tefzel" ..New Design Flexibility i No other plastie r? sin comes so close to the Quoro-ELECTRONIC COMPONENTS carbons in chemical and electneal properties while providmg a high levei of mechanical ruggedness and easy, economicai processmg. "Tefzel" opens a new range of opportumties for design enguiders to achieve bette: product performance in many applicatior areas. l l S @F^ v AUTOMO TIVE .E, s g a 3 r. 1 f 4 7. N. w e ^ T-h ~ s

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-4 k Outstanding ~ electrical properties, solvent resistance, an SE.O Gammability rating. and er.cellent high tempera-ture aging charactensties make "Tefzel" an ideal mate- ,Y rial for high performance electrical components. CoC 0 ~ .] forms. connectors. encapsulated parts. sockets. and a 'es"i> > <> =r 'r n'c>> eei><='>e"s-1 -. :.. f - + ~~. w :.J This seal gland. used in a shock. absorbing bumper system. is one example of the ability of "fefzel" to form rugged, dimensionally stable automotive compo-nen t s. FASTENERS BEARINGS 1 Y Mi yQ c w ira sarr m a e Cable and hydraulic line clamps, cable straps, and other fasteners molded of "Tefzel" perform in high tempera Class remforced "Tefzel" is suited for load bearing ture, corrosive environments. Nuclear applications are appheaticas in abusive environments. A low wear factor possible because of the radiation resistance of"Tefzel".

  • O' (one tenth that of rereforced nylon) and good creep Meisture absorption is low providing uniformity of resis'ance make it an excellent hearing rr.aterial.

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l = I VALVE LININGS .w,,. a ~ 4 > . e- .] g _,==a d lQ ?.? .d* . ; 3,3:! n.' e 5 .p - -w k... p ~ 91 .~ ~ => "Tefzel" ha. replaced glass and other polymers as a valve

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g linmg., The outstanding resistan'ce of "Tefeel" to neids, $t e rw. bases. and solvents 'over a broad temperature range, combined with abrasion resistance and ease of pro. impaet strength,l*V resistance, and the availability of 10 cessing. results in a durable and economical valve. color concentrates for color codmg are additional advan tages. TUBING . ~ q.r .a p Y%. _, ~ .m~--~~-~- ~ 1., I W J %? ;r- % tf;

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4 v licat shrinkable, plam, and corrugated itibing is available in a wide range of thicknesses and di.imeters. It is being used at high temperitures as elecincal msulation and in service with strong chemicais. lieut shrinkable tubing conforms to electrical terrnina-tions. hose connections, and other components to hl insulate. guard against abrasion, and ;Levent corrosion. 4 1

't VvlRE AND CABLE BIOMEDICAL /LABWARE ,.,f 5 +i. w/h.3d .c..

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g%, - - - i.;- - - ,W,.:. r bV ,f y .~' Q' L.y sm %r ['#;7 3 h;\\* d y u. $r -r "J @ ch$$m$, y{.g( s-l P p;k .g;s: y n WA Ibi r r r w ar., f U h ( '( 4 Tough insulation of "Terzel" is being used on condue. tors ranging from AWG =30 for wrapped computer irrrninations to 535 MCM for heavy power circuits. "Tefzel" is performing well on steel null cables, airframe uire, down-hole oil well'iogging cable. rapid transit car Rgh impact strength chemical resistance, resistance to ~ and locomotive control wire, and other rugged service high heat sterilization, and ease of processing are wire and cable. It is receiving special consideration for properties needed for biomedical and labware applica-use in nucicar power plants and other areas where tions. Oxygen respirator components, blood analyzer esposure to radiation may be encountered. valves, evaporating dishes, and centrifuge tubes are cumples. PUMP COMPONENTS FILM FORM AVAILABli! ~ [I , '.. I f;[ w t b,

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Film of "Tefzel" can be heat sealed. thermoformed. s m welded, heat laminated and coated to make pressure Chemical resistance dimensional stability. and structural sensitive tapes. flexible printed circuits. liquid poucl:es strength make "Terzel" a candidate for pump impellers, and other constructions where strength. thermal resis-vanes, gears, and bodies. tance and electricalintegnty are required. O 5

~ g,1mp l SPECIFICATIONS i g The ASTM material specification is D 3159. "Tefzel" is called out as a wire insulation in MIL W. ) 81$t22/13, a U.S. Navy specification on solderless wrap wire. { "Tefzel" is covered in MIL.W 22759/16, /17,/18, and /19, a joint services specification for aircraft wire. "Tefzel" is eso called out in various industrial specifications for wire insulation, cable jacketing, tubing, film, and molded components. COMMERC# ALLY AVAILABLE "TEFZEL" FLUOR 0 POLYMERS 3 "Te fzel" 200 General parpose, molding and ex. j trusion resilt. ) For application: requiring extra re-siaance to unusual nvironmental extremes or stresses in processmg such as lined chemical equipment, paru with molded in inserts or thick sectiont, and special wire and cable applications. "Tefzel" MG-25 25% glass reinforced composition j for greater mechanic 31 strength. (Data based on developmental product "Tefzel" # T 2004.) "Tefzel" Film Available in a wi:le range of thick-G0neral Properties nesses for electrical, chentical and rdene applications. of "Tefzel" Q. "Tefzel" can best be described as a rugged thermoplastic with an outstandmg balance of properties. Mechanically, it is tough, has medium stiffness (200,000 psi), excellent flex life, impact, cut-through and abrasion resistance. The glass fiber reinforced compound ("Tefzel" 70G-25) has even higher tensile strength (12,000 psi), stiffness (950,000 psi), and creep resistance, but is still tough and impact resistant. Thermally, "Tefzel" has a continuous temperature rating of 300*F (150*C). It can be used intermittently up to 200*C depending tn exposur'e time, load and environment. "Tefzel" 700-25, based on less complete data, appears capable of useful service at 392*F (200*C). "Tefzel" is weather resistant, inert to most solvents and chemicals, and hydrolytically stable. It has excellent resistance to high energy radiation. Electrically, "Tefzel" is an excellent !ow loss didec-iric, with a uniformity of electrical properties not normally found with other thermoplastics. "Tefzel" extrudes or injection molds easily using conventional techniques and thus presents no unusual operator traming problems. Corrosion resistant equip-ment is recommended for extended production runs. "Tefzel" can perform successfully 'in applications where other materials are lacking in mechanical tough-ness, broad thermal capability, ability to meet severe environmental conditions, or limited by fabricating problems. As is the case with all new developments, a thorough prototype and test program is recommended to insure a successful performance of "Tefzel" compositions m y) specific applications. 6 1

q .g I Table 1/PR OPE RTIES O F "TEFZEL" 200. 280 and 70G-25 ) CONDITIONS: 73*F,50% RELATIVE HUMIDITY UNLESS OTHERWISE SPECIFIED ASTM "!EFZEL" "TEFZEL" Units Method 200.230 70G-23 Ultimate Tensile S trength ' psi D 638 6.500 12,000 2 kg/cm 455 840 { Ultimate Elongation 200(1) 6 Compressive Strength psi D 695 7.100 10.000 8 kg/cm '500 700 Shear Strength psi D 732 6.000 6.500 2 kg/cm 420 460' Heat Deflection Temp. D 648 66 psi

  • F 220 510 4.6 kg/cm'

'C 104 265 264 psi

  • F 165 410 2

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  • C 74 210 Max. Continuous
  • F 302 392 Use Temp. No Load
  • C 150'2' 200 Low Temp. Embritt.

'F D 746 Below -150

  • C Below - 100 Specific Heat 0.46-0.47 Therm. Conductivity BTU (hrf' (ft.f2 (*Fr (in.)

1.65 1.66 k cal (mT8 (hrf' (*C) ' O.205 0.205 Tensile Modulus psi D 638 l 20.000 1.200.000 2 kg/cm 8.400 84.000 0 Fiexe,aiMedeies e,i D 790 200.000 950.000 2 kg/cm 14.000 66,500 j Impact Strength Notched I:od D 256 3 -65*F (-54*C) ft. Ib./in. >20 7 N.m/m >l100 380 73"F (23*C) ft. Ib./in. No break 9 N. m/m 485 Deformation Under Load 2000 psi at 122*F D 621 4.11 0.68 140 kg/cm a't 50*C 3 Coefficient of Linear Expansion D 696 70 1 2/J-30*C cm/cm per *C 9 x 10-5 3 x 10 s 68-86*F in./in. per *F 5 x 10-5 1.7 x 10-5 50- 90*C cm/cm per 'C 9.3 x 10 5 1.7 x 10-8 122-194*F in./in. per *F 5.2 x 10 8 0.9 x 10-5 140- 180*C cm/cm per *C 14 x 10.s 3.2 x 10 5 284-356*F in./in. per *F 7.8 x 10'5 1.8 x 10-5 Specific Gravity D 792 1.70 1.86 (1) Elongations between 100 & 3007c are schreved with varying methods of sample fabricauon. IILons-term heat armg test m "Teftel" 280 are m propress. E.arly data mdicate that initial properties are retained after more than 2000 hours at 200*C. It is expected that the continuous use temperature of "Terzel" 200 will be above 150'C. Note: These values are typical properties based on average values and should r at be used for maximum and mimmum specifications. j ..O 4 7 _ j L i

Table 1/ PROPERTIES OF "TEFZEL". co, rso and 700-25 j CONDITIDNS: 73'F,50% REL ATIVE HUMIDITY UNLESS OTHERWi$E SPECIFIED h ASTM "TEFZEL" "TEFZEL* Units Method 200.:80 70G-:3 D 635 ATB <5 sec. Flammabihry UL 94 44V-O 94V-O A 10 mn@ Meltine Poini ~ DTA Peak

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$20 l{ 'C 270 270 jl Water Absorption Il Saturanon D 570 0.029 0.022 1 Hardness Rockwell D 785 R50 R74 1 Duremeter D D75 Coefficient of Friction W Dynamic (100 psi at > 10 fpm) 0.4 0.3 Static (100 psi) 0.3 Dielectne Constan t D 150 10'Hz. 2.6 3.4 3 10 Hz. 2.6 3.4 10'Hz. 2.6 3.4 10*Hz. 2.6 3.4 10'Hz. 2.4 3.0 i 10' Hz. 2.3 Dissipation Factor D 150 10 H?.. 0.0006 0.004 8 10 Hz. 0.0038 0.002 10'Hz. 0.002 10'Hz. 0.003 10

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0.005 0.005 10"Hz. 0.005 T 10 ' " Hz. 0.010 0.012 Volume Resisuvity ohmem D 257 > 10' ' 10 Surface Resistivity ohms D 257 5 x 10 10'S Dielectric Sirength Volts /nul D 149 Excellent Excelleni kv/cm Arc Resistance Sec. D 495 75 l10

  • AT ls avera c imie ni burmn>: io neares 5 secondt Allt avsrape len;:th of burn to nearest 5 mmJesi bar tincknew n 0.116 in.

"'Wone Wicrul AISI lot k Sicel. Rc20.16 A A Note: These values are iypical properiies based on avere:e values and should not be used for masimum and minimum specificationt Mechanical Properties 'I STRENGTH AND STIFFNESS Because of the nonlinear character of the curves beyond j j "Tefzel" is less dense, toucher. siiiTer. and exhibits a approximately a l '4 strain, calculanon of a corre-lucher toisile strength and cieep resistance than"Tellon" SPondmg stress based on tangent or secant (19 offset) j TEE and HP fluorocarbon resms. It is, however siini-modulus would be inaccurate. 1 Thus. it is recommended that if the calculated strain larly ductile, and "Tefzel" composinons display the exceeds 1% the stress value should be read from the relatively r.onhnear suess strain relationships characteris-tic of nearly all ductile materials. curve. For long terrn strain calcubtions. the apparent modulus procedure should be used as presented on page STRESS-STRAIN IN TENSION I 2-Figure. I shows the elastic behavior of,,Tefzel,, AND COMPRESSION 70G-23. Only a portion of the behavior of "Tefzel" Figure I shows "Teftel" 200 and "Terzel" 70c-03 at 200 is presented since its ultimate elongtion is in the A, room temperature m both tension and compression. 100 300% range (dependmg on sample preparation). V 1 l l i i I8 I 1, i

..~,__~? 't 3 Figure 1/ TENSILE AND COMPRESSIVE STRESS VS STRAIN. By ASTM D 638 at ROOM Temperature, Tensile Specimens: ASTM 25 Compression Specimens: Cylinders 0.5"(12 mm) Diam. by 1"(25 mm) Long 11,000 10.000 1 gf 4 8.000 560 .4 7,,X)0 i l 6.000 420 / 5.000.! 2 4.000 280 3.000 l 0 g f 140 j ~, l g l%8 Comprmeve Siram 9g 0 0 4 1.000 (%) Tensile Spain 2.000 Y 3 000 F 4.000 280 I j J 5.000 A I I I 6.000 420 /gd 7.000 B.000 560 l 9000 3 2 1 0 1 2 3 4 5 6 7 Strain (%l O 9

~- -. I t Figure 2/ TENSILE STRENGTH VS TEMPERATURE Figure 4/ TENSILE MODULUS VS TEMPERATURE By ASThi D 638; ASTM :S Bars TEFZELS 70G-25. ASTM D 638; ASTM #5 Bars x. t i l se N l i f O'. f N 5 ~ h } 1 l -i J i ~ f i O~lis ir q l 7 i j = i i o w a u a r w, 6. 'a**'.. rci a a ..o a m a u ,r i-rei figure 3/ FLEX STRENGTH VS TEMFERATURE ~ By ASTM D 790,0.1"/ Min. Cross Head Speed; Span 3" (76mm); Specimens 0.5" Wide (13mm),0.175~ High (4mm) Note: Failure is arbitrarily defined as stress at which 5% Figure 5/ SHEAR STRENGTH VS TEMPERATURE - strain is reached. TEFZELS 200. ASTM D 732; Specimen Thickness 0.25" g (6mm) I I i l an .,o 1 1 i i I 1 l 6 000 to 6 ~. -. io } h s a n g g j -) } ,3. i 1 I! ,o ,.o I k i i= m I l l b In 4% = ,--... c e. i _J u m hameewe t Temer.ians t*f a l 't ? PA P.- 3h )f t. Imewe i B O-l 10 i, l ~

T l e .i " N OTHER ELASTIC PROPERTY DATA Figure 7/TEFZEL' 200 - A.STM D 882-64r Figures 2. 3,4,5. 6 anj 7 show tensile strength. Dexur1) Elongation vs. Temperatuse (16 mil Compressnn Molded J strength. tensile t todulus, shear s:rer.gth, flex modulus. Film) j and elongation vs. temperature. Room teraperature 1 Dexural stress vs. strain is shown in Figure 8.- GLASS FIBER ORIENTATION . soo IN MOLDE0 STRUCTURES Glass fibers in an iniection molded part tend to line up r..\\ para:lel to the ;ines' cf now in filling the (nold. This 500 I produces nonisotropic strength properties in the part. Table 2 shows that tensile strength of"Tefzel" 70G-25 measured perpendicular to tiber erkntation is 70 75'~c of that parai!el to orientation. Thus, a design safety facter 400 is suggested io recognize this phenomenon. ~ g l -e 2 l g300 Table 2/sFFECT OF ORIENTATION OF GLASS FIBERS y ON Th.NSILE PROPERTIES OF "TEFZEL" 70G-25 73*F. 23 C 200 Parallel To Perpendicular To Glass' Glass 100 a Tensue TensDe S trer.gth Elongadon, % Strength Elongation. % 12.000 psi 8 8.630 psi 8 2 2 860 kg/cm 8 605 kg/cm 8 0 30 100 150 200 Tem perature, 'C Tegt by ASTM D 638 i 100 200 300 400 i Tem perature.

  • F Figure 6/ FLEX MODULUS VS TEMPERATURE TEFZELS 200 & TEFIEL8 70G-25, ASTM D 790: Beam approx.: 0.5" (1.25 cm) Wide: 0.175" (0.45 cm) High; 3" (76mm) Span Figure 8/ FLEXURAL STRESS VS STRAtN - TEFZELS 200

& TEFZELt 70G-25. B.STM D 790; Room Temperature

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3 23*C (73* F); Span 3" (76mm); Specimens 0.5" Wide (13mm), 0.1n5" High (Amm) ) ..,9 p s e9 .i 20 000 14sg f { l e< ...r (10 0 , Oh0 1-7 i I I l l j 8 J,,_ i y } l I N l. ,...,.r, I i j O L. L i

CREEP, APPARENT FLEX MODULUS, with time. The " apparent modulus" concept is a way of AND LONG TERM STRAIN mathenlaucaHy desenbing this creep behavior. h As with other plastics. ambient temperatures,ind dura-Apparent modulus (Ea) = Stress a fhed value) tian of load are import;;nt design variables. (atter a pven time ofload Total stram ( measured The usual relationship; application ai a given after the pren time of 3,,,ss temperature) exposu re) ^ --- = M odulus S I'3* Figure 9 plots " apparent Oexural modulus"of"Tefzel" apphes tu short term loading of an clastic structure. 70G_23 vs. time at two temperatures. Most treep occurs When lo.id is apphed, an minal de0ecuon occurs. If the within the GrSt year and.therefore, the apparent moaulus load is not escessive (i.e., for "Tefzel" a load producing at 10.000 hours ca'i be used in many cal ulations in-less than 19 strain) the conventional modulus figure volving contmuous load (substitute Ea for E). i

ndi;ates the correct stress stram relationship, and stan-

"Appaieni modulus" is a function of temperature and dard engmeenng equanons may be apphed to prefict time. Figure 9 gives the " apparent tbural modulut." at periormance. 73* F (23*C) and 212*F !100*C s. To approunute If. however. the load is maintained continuously, all apparent modulus at other temperatures, use Figure 6 matenals deforra or creep. generally at a decreasing rate which shows Hexural modulus as a function of tempera-l Figure 9/ CREEP.- APPARENT FLEX MODULUS VS TIME & TEMPER ATURE. By ASTM D 674. TEFZELE /oG-25. I 1, f ..,o 1.... j 1 J l ...,e ,is ..e i g i Figure 10/ FLEX FATIGUE OF TEFZELE 200 AND TEFZEL4 70G-25. ASTM 0 671 - Tension / Compression;1800 Cycles / Min. 23'C,50% RH: Sample Type i, Srnstl . v. m m,,,..,. ) ys, ,+ - t

  • e

.l i s u ,s so 2-i:

a. 't ture. For a given use temperature, read th:: modulus f or FRICTION AND BEARING tl EAR "Teizel" 70G-25 from Figure b and using it for the Unlike many other polvmers, the addition af pass .O

l. hour apparent modulus on Figure 9. draw a straight remforcement in' prove > the frictional and wear proper-line througit it approximating the slopes at 13*C or ties of "Tefzel" For example, the dynamic cuetficient 100 C.

of fnetion (100 psi at >10 FPMi for Test" 2av is 0.4 while tM eurves of Figure 4 are oased on actual tests but drops to 0.3 for "Tetzel" 70G -23 at these on "Tefzel" 70G 23, the same techniques can be used conditions. The wear factur also improves from 6000 x to approximate the long term performance of "Tefzel" j0 40 to 16 x 10- ind mm.ift. Ib. hr. These improsed 000, using flex modulus data from Figure 6. fnetional and wear characteristies. combmed wnh out-The abose discussion has related to Sex modulus only. standing creep resistance. suggest that. the glass-For prxtical purposes, however, the same procedure reinforced resin be favored for bearing applicanons. normally will pve adequate design results for tensile or "Tefzel" 700-25 alw appears to be less aorasive on compressite stresses. mating surfaces than most glass. reinforced poly mers. The static coet0cicat of inetion for "Tefiel" 700 23 FLEX FATIGUE is dependent on beanng pressure. This relationship is y an i f tion is dependent on pressure a,nd rubbing

  • eftel" 70 5 I as eat r atgu t il "Tefzel" 200. but both are quite sensitive to stress velucuy (PV). Figure,1,1 (page 15),is a plot us coelficient levels. For best fatigue perfoim.mee, stress levels below f fricti n against P\\ tor "Tefzel 70u-23 agamst steel.

1 3.000 psi and L750 psi are surgested for "Terzel" The generation of frictional heat is deper. dent on 70G-JJ and "Tefzel"200 fespectively. coefficient of frict>on and the PV factor. For Tetzel, 70G-25, temperature buildup begins st about a Pt of 10.000, and thermal runaway occurs just below a PV of IMPACT STRENGTH 20.000. The equilibrium beding temperatures are shown "Tefzel" 200 and "Tefzel" 230 have high impact as a function of PV in the upper right side of Figure 11. strength, ranking among the highest of all plastics over a High wear rates begin at a PV above 15.000, bread temperature range. The low temperature en1 brit. The rate of wear depends on the type of metal rubbing tlemeni point is below -150* F (- 100'C) which suggests surface and on other factors such as finish. lubrication. possible cryogenie utility. Additional data is presented in and clearances. Lubrication. harder shaft surfaces, and Table 5 (page 14). high finishes all improse wear rates.-Minimum diametral clearances of 0.3 to 0.57 are suggested for sleeve bearings. Table 4 gives wear facto wear rate of both Tereci,rs for steel and aluminum. The Table 3/ STATIC FRICTION (ZEF0 VELOCITY)- and the metalis much higher "TE FZE L" 700-25 for aluminum than for steel. Therefore, if,iluminum is the mating metal. an anodized surtace is suggested. Pressure The wear factor of "Terzel" 70G.25 agamst steel is 3 about one tenth that of 33'i glas. reinforced nylun. Psi Kg/Cm Coefficient of Friction 10 0.7 0.51 50 3.5 0.38 100 7.0 0.31 $00 35 0.34 Table 4/"TEFZEL" 700-25 BEARING WEAR RATE' Pressure Velocity hear Factor Mating Surface Psi Kg/cm Ft./ min. Cm/sec. k"TEFZEL" KMe:al Steel' 1,000 70 5 2.5 16 x 10"' 4 x 10" ' 1,000 70 10 5.1 14 x 10 6 x 10" ' 1,000 70 15 7.6 19 x 10 ' 13 x 10"' 4 48 16 x 10"' 1,000 70 17.5 8.9 30 x 10 I,000 70 20 10.2 Fall 2 Aluminum 300 21 10 5.1 1.220 x 10"' 1,200 x 10"' 100 7 50 25.4 480 x 10

  • 390 x 10"'

' Thruu bearing tester, no lubricant. ambient air temperature. metal finish 16 micro-inches (406 nano-rneterst ' AISI 101d UIN M t Enginh) 13

gi Thermal Properties TEMPERATURE RATING Table 5 presents the effects of agmg on "Teftel" "Tenel" 200 has a continuous use temperatuie of 70G-23 on notched Izod impe.ct strength. Short term k 002* F f l 50 C). The raung is based on 10.000 hour exposure at 150*C causes no measurable lost of impact l agmy tcsts wluch invohe exposure of wire insulation to a strength whde such exposure at IbO"C does cause a j senes of elevated temperatures to determine the late of smau decrease. degradation of tensde and elongation properties with time. The raung is based on fitting the data to an Table 5/1Z0D IMPACT ;TRENGTH Arrhen:us plot.(the loganthm of die rate of degradation of a physica! property is a straight line when plotted agamst the treiproca! of the absolute temperature of "TEFZEL" 70G-23 exposurel. By one convennonal definition. the tempera-Test Notched liod' ture rating is that temperature at which tensile strength Temperature Aging Ir"pset Strength or clongation salees at 20.000 hours have reached half (Ft. lbs.an.) (N. M/M) of the milial salues. _ io* F (-40*C) As molded 7.7 416 Data on "Tenel" 200 indicate a 20.000 hour nalf hfe 7 P F (2 3* C) As molded 9.1 491 temperature fir clungal.on between 31l'F (155 C) and 73* r (23* c) 168 hours r. 302*F 9.1 491 3:0"F ( 160 C). For tensde strengt.N the value is 168 hours ta (150*C) between 347 F ( 175'Cl &J 356* F (180'C). We have 7P r (23*C) 168 hours (a 356*F 7.9 427 chown to rate the matenal at 302* F ( 15 crc 1 for 168 hours ret t ho'c) contmuous use, but short term excursions up to 392*F (200'C) may be pernussible dependmg or the environ. TE FZ EL" 200 "Y' ^ ' *""#d 0 "I *U st dat m "TeDel" 70G - 23 are hmited. but ^'""'d

    • *
  • k r

sheri.ie m iests mdicate good property retention at 3C F ( 200' C).

  • Hv ASTM Mr so TENSILE STRENGTH VS.

TIME AND TEMPERATURE Figure 12 shas how room temperature tensile streng!h is effected ts) esposure ome and temperatures. These data were obtained on specmiens exposed to no mechan. ical stress durmg agmg and so are dircaly pertMent only LOSS OF WEIGHT WITH AGING j to a deuce. e g.. a wue. which is exposed to temperature Table 6 shows annur' weight loss at elev:.ted tempera-wah hule or no load. and then is mechanically stressed tures. The exceDent thermal stability of "Teful" is at room tempe<aiure. demonstrated by the 356'F (180 C) data. At this To exploie the use of Figure 12. deiermine whai temperature. fractional loss of weight is 6 parts per esposure ai :'5 F t 135"C) will redace tensde streng'.h 1.009. or almost 2 yeacs before I'd weight loss occurs. Io 3.000 psi From these data, the anss-fr is oser 30 i years. At 350 F t 180 C) ihe time is just over 2 sea.s. At the r.ncJ temperature of 302' F ( 150' C) the time is Table 6/1.0SS OF WEIGHT WITH TIME AND over 10 s eais. TEMPERATURE "7E FZ E l " 200 l ELONG ATION VS. Annual Rate of TIME AND TEMPERATURE Aging Temperature weight Loss * 'F 'C g!g I Figure 13 s a simdar graph for room temperature eloccanon anJ is used m the same fashion as the tensile 275 135 0.0006 data'm Figuie 12. 302 150 0 0014 331 165 0.003 HE AT AGING OF GLASS REINFORCE 0 356 180 0.006 POLYMER "TEFZE L" 70G-25 3 Figure 14 (page 16) summarizes the results of 2.000

  • Inmai low or absorbed gases 0 0013 g g at any etevate.1 hl-hour acm; tests at temperatures up to 446 F (230'C).

iem pera t ure. Longer term te>ts are m progress. 14 b

't Figure ll/ FRICTIONAL BEHAVIOR - TEFZEL+ 70G-25 VS STEEL. Thrust. bearing tester, no lubricant, mating surface AISI 1080 steel,16AA. (Wear transition temperature between 235 & 300'F) (113 - 150'C) i i c.. I t iso... J g.__ ) { es / / ,/ -a* s y -* y 3 03 1 i T s I {,, l i. I, I 1._ in. .o. ,m.... a....,~,. m...... ao......~... me, cr .. - i,... Figure 12/RETENT10N OF ROOM TEMPERATURE Figure 13/RETENTIGN OF ROOM TEMPERATURE TENSILE STRENGTH AFTER. AGING - TEFZEL? 200. ELONG ATION AFTER AGING - TEFZEL S 200. to .F se f i , tow vs t us I t .n ss v., i \\ e ,,e.., \\ I a \\ l t i - =. - s \\ io.

== i, \\ . s... ir s D l_ j ) i s 1'- %-- N s,. .e.. s.t'sY.'.e l ,b . ~..... I'i e .s w. l UU'UEo* -..~ ' O'0','.'"' Mr l \\.... 'OT'.< "*' !'M l ..n L P a *"",'T ', ?. lh -.n a n3?4* ?.,'fTumi l i i '..Ili ll samen e teve re, g 1, e gs j l l no = m m = = w a m f ogue. selene Pf e i em fe.ql 8 6 15 .m..

fc +. = Figure 14/EFFECT OF HEAT AGING OF TEFZELT 70G-25. (All values of elongation between 5 & 10% regardless of test temperature) (No load during aging) 14DC 380 l 12 one s4o A,so at T5 ei 23*C TJ',c i -'*c'"" f,'/,J, to 000 swe. en 700 l -e 1 b m SO C - (3

  • ea6',1 gg i
m. - i 2a

~ l l i ic m s om

s. -.

9: MISCELL ANEOUS THERMODYNAMIC DATA P AMMABILITY & SMOKE Table 7 pesents other thermalcharactenstics of 'Terzel" "Tefzel" is rated SEO by the Underwriters' Laboratory compositions. defininon in UL 94 for unpigmented resms down to 0.062 in. thick. By ASTM D 635, "Tefzel" nas an average time of burnmg ( ATB) of les3 than 5 seconds Table 7/THERMODYN AMIC D ATA. and an average length of burn ( ALB) of 10 mm. The test "TE FZE L" 200.1so. 70G-25 bars were 0.116 in. thick. Its oxygen index or 01 is 30 (Lencral Electric Limning Oxygen Index) by ASTM 2863 70, which means that it requires an atmospheie

1. \\letimy Puin 520"! (270 C) c:entainin7 at least 30% oxvaen by volume (air is 219 2 lleat of Subbm. tion 100 c.donevym 61530 HTU/lb.)

oxvgen) L'o maintain combu'st' ion in a downward burning I 12 Ldualons/ mot fla'me. "Tefzel" also passes ASTM D 2633 and UL 83

3. Heat of I uuan 1I cak/gm t19.8 HTL lib.)

flame tests.

4. Specife Heat

("Tl I ZL L" 200. 40) 0 46 - 0.47 cals/gm *C or itTUllb. 'l f with httie depen-dence on temperature; Table B 1 'TI~ s Z L L " 70G-2.5 ) 0 40 cals/gm 'C or BTUnb. ' F

5. Heat er Combustion 327R cals/gm llent of Combustion 5900 BTUllb.

Afaterial 1510.1b. (. ais. 'Fm. Limitmg Osygen Indes

6. T hermal Conductr.ity 1.65 BTU t brs.r' nt.r' r i r' (mi "TIIZiL" 5.900 3.280 307 ou pen 9 n00571 cals(sec r' hmr' OCr' "TEI LON" TFE 2.200 1.220

> 95'i 09 gen

7. Critical Surface T:nuon Coal 14.000 7.780 of Mohto Reun 22 dynes /cm Pobcih>lene 20.000 11.100 IH9 ou gen 16 I'

i Environmental Properties oO i Environmental behavior refers to the reaction of esters. chlorocarbons, and classie polymer solvents have "Tefzel" when exposed to chemicals. sunlight, moisture. little effect on "Tefzel" Very strong oxidinny acids or nuclear radiation. such as nitric, organic ba>es such as ammes and sulfonic acids at high concentrations and near their boiling points CHEMICAL RESISTANCE will a Yeet "Tefzel" to varying degrees. "Tefzel" has outstanding resistance to attack by chemi- "Tefzel" 706-25 shows chenucal resistance similar to f cals and solvents that ofan cause rapid deterioration of the base fluoropolymer. except m cases where rem-other plastie. materials. In our experience. "Tellon" f reing glass may be attacked by the chemical media. fluorocarbon resins are the only known plastic materials There is evidence that strong oxidinng agents. particu. f having a greater degree of chemical resistance than larly at lug,h temperatures, wW auxk the bond bet, ween "Te fzel" "Tefzel" is inert to strong mir,eral acids, the gla>s and polymer causmg a reduction m remf orce-inorganie bases, halogens, and metal salt solutions. Carboxylic acids. anhydrides, aromatic and aliphane Table 9 presents data on the effect of various hydrocarbons. alcohols. aldehydes. Letones, ethers, chewcals on "Tefzel" Table 91"TEF2EL" CHEMICAL COMPATIBILITY ORGANIC CHEMICALS Test Retained Properties - % B.P. Temp. w t. CHEMICAL 'F

  • C

'F 'C Days Tens. Str. Elong. Gain Acid / Anhydrides Acetic Acid (Glacial) 244 118 244 Iis 7 b2 80 3,4 4 Acetic Anhydride 282 139 282 134 7 100 100 0 3 richloroacetic Acid-384 196 212 100 7 90 70 0 Trichloroacetic Acio 384 196 248 120 30 100 100 Aliphatic Hydrocarbons Mineral Oil 356 180 7 90 60 0 j Naphtha 212 100 7 100 100 0.5 Aromatic Hydrocarbons Benzene 176 80 176 80 7 100 100 0 Toluene 230 110 230 110 7 Functional Aromatics 0 Cresol 376 191 356 180 7 100 100 0 Amines 1 Aniline 365 185 248 120 7 81 99 2.7 - Aniline 365 185 248 120 30 93 82 Aniline 365 185 356 180 7 95 90 N-Methyl Aniline 383 195 248 120 7 85 95 N Methyl Aniline 383 195 248 120 30 100 100 N.N Dimethyl Aniline 374 190 248 120 7 82 97 1 n Butylamine 172 78 172 -7b 7 71 73 4.4 Di n Butylamine 318 159 248 '120 7 81 96 Di-n Butylamine 318 159 248 120 30 100 100 Di n Butylamine 318 159 320 160 7 55 75 Tri-n-Bu tylamine 421 216 248 120 7 81 80 Tri n Butylamine 421 216 248 120 30 100 100 Pyridine 240 116 240 116 7 100 100 1.5 = Change in properties <l5% is considered insignificant. . Samples were 10-50 mil microtensile bars. TS/E and wt. gain determined within 24 hours after removal from "' O xPe>=' - ea>=-

  • Exposed for 6 hours.

4 17

Table 91"T EFZEL CHEMICAL COMPATIBILITY INORG ANIC CHEMICALS Test Retained Properties - % B.P. Temp. h t. CHEMICAL "F 'C 'F 'C Days Tens. Str. Elong. Gain Cidorinated Sohents Carbon Tetrachionde 172 78 172 78 7 90 80 4.5 Chloroform 144 62 142 61 7 85 100 4.0 Dichloroethylene 170 77 90 32 7 95 100 2.8 Me thy lene Chlonde 104 40 104 40 7 85 d5 0 ' Freon' ! 13 l15 46 115 46 7 100 100 0.8 Ethers Tetrahydrofuran 151 66 151 66 7 86 93 3.5 Aldehyde / Ketones Acetone 132 56 132 56 7 80 83 4.1 Ace tophenone 394 201 356 180 7 80 80 1.5 Cyclohexanone 312 156 312 156 7 90 85 0 hiethy l E thyl Ketone 176 80 176 80 7 100 100 0 Esters

n. Butyl Acetate 260 127 260 127 7

80 60 0 Ethyl Acetate 170 77 170 77 7 85 60 0 Polymer Sohents Dimethy lformamide 309 154 194 90 7 100 100 1.5 Dimethviformanude 309 154 248 120 7 76 92 5.5 Dimeth5 hulfoxide 373 189 194 90 7 93 90 1.5 Other Organies g, Benzyl Al,ohol 401 205 248 120 7 97 90 T' Benzoy l Chlonde 387 197 248 120 7 94 95 Benzoy l Chlonde 387 197 248 120 30 100 100 Decahn 374 190 248 120 7 89 95 Phthaloy! Chlonde 529 276 248 120 30 100 100 Acids Hvdrochione (Cone ) 223 106 73 23 7 100 90 0 H5 drochlone t Cone) 223 106 223 106 7 96 100 0.1 Hyd rob romie (Cone ) 257 125 257 125 7 100 100 Hydro 0uone (Cone 1 73 23 7 97 95 0.1 Sulfune (Conc) 212 100 7 IUD 100 .0 Sulfunc (Conc) 248 120 7 98 95 0 Sulfunc tConc) 302 150 98 90 0 Aqua Regia 194 90 93 89 0.2 Niine - 25'i 212 100 212 100 14 100 100 j Nitnc 509 221 105 221 105 14 87 81 Nitne - 704 (Conci 248 120 73 23 105 100 100 0.5 Niinc - 709 (Cone) 248 120 140 60 53 100 100 Nitric 70'.; (Con, ) 248 120 248 120 2 72 91 Niine 709(Con ) 248 120 248 120 3 58 5 Nitric 7(N(Cone) 248 120 248 120 7 0 0 Chromie 257 125 257 125 7 66 25 Phosphonc (Cone) 212 100 7 Phosphone (Cone) 248 120 7 94 93 0 . Change in properues <l59 is considered insignificant. . Samples were 10 50 mil mieroiensile bars. TS/E and wt. pain determined within 24 hours af.er removal from exposure media. l 18 I* i ~-

j i j Table 91"TEF2EL" CHEMICAL COMPA TIBILITY INORGANIC CHEMICALS l LJ Test Retained Properties 'J l B P. Tem p wt. CHEMICA L

  • F

'C "F

  • C Days Tens. Str.

Elong. Gain Halogens Bromine ( Anhy) 138 59 73 23 7 90 90 1.2 Brumine ( Anhy) 138 59 135 57 7 99 100 ' Bromine ( Anhy) 138 59 135 57 30 94 93 34 Chlorine ( Anhy) 248 120 7 h5 b4 7 Bases Ammonium Hydroside 150 66 7 97 97 0 Potassium Hy droude ( 207 ) 212 100 7 100 100 0 Sodium Hydroxide ( 5(M) 246 120 7 94 60 0.2 l Peroxides Hydrogen Peroxide - 307) 73 23 7 99 48 0 Salt-Metal E tchants Ferne Chloride - 257 220 104 212 100 7 95 95 0 Zine Chloride - 259 220 104 212 100 7 100 100 0 7 Other inorganics i Sulfuryl Chjonde 155 68 155 68 7 86 100 8 i Phosphone Trichloride 167 75 167 75 7 100 98 Phosphone Oxychloride 220 104 220 104 7 100 100 Silicon Te trachloride 140 60 140 60 7 100 100 Water 212 100 212 100 7 100 100 0 Miscellaneous S ky drol 300 149 7 100 95 30 l O ^<re,re 300 i49 7 92 "3 . 3." l A 20 Stripper Solution 284 140 7 90 90 1 . Change in properties <l5?c is considered insignificant. I . Samples were 10-50 mil microtensile bars. TS/E and wt. gain determined within 24 hours after removal from exposure media.

  • Exposed for 6 hours.

4 i O,J l9 1

1 HYDROLYTIC STABILITY WEATHER RESISTANCE AND WATER ABSORPTION Based on acceleraied laboratory tests repo:ted m Table Hvdiolvtk stabihty is indicated by lack of deterioration

12. "Tefiel" 200 has excellent weather resistante, m

in' phs s'ical properties after long periods of exposure to whereas "Tetzel" "OG-25 is affected by weather conds-J boihn'g water. nons. No correlanon exists for "Te fiel" relaung Usmg room temperature tensile strength and elonga. Weathei O Meter exposure time to outdoor exposure. tion as control properties. "Tefzel" 200 is essenti lly Long term outdoor test'np a in progress, and exposure unaffected af ter 3000 hours exposure to bothng water. for more than a y ear m Flonda and Michgan nas had no "Tefzel"260 behases similarly. effect on "Tefzel" m. "Tefzel" 70G-25 shows a decrease in tensile strength of 25 359 after 3000 hours exposure to boihng water. The composition loses its reinforcement characteristics but the actual polymer does not appear to be affected. Table 12MEATHERING RESISTANCE - By " Weather-0 Meter"' Longer term tests are in progress. Data are shown m Table 10' Mater absorption is low as shown in Table 11. This "TEFZ EL" 200 contnbutes to the outstanding dimensional stability of Exposure Tensile Strength 2 Elongation: "Tefzel" components as well as to the consistency of t hours) (Psi) ng/cm ) i mechanical and electneal properties regardless of humidity. Initial 6,530 457 186 1000 6.370 446 163 2000 6,510 456 187 ~ Table 10/HYOROLYSIS RESISTANCE "TEFZEL" 200 "TEFZEL" 70G-23 700-25 RESIST ANCE TO BOILING WATER Initial 12.370 b66 5 1000 7.520 526 Tensile 2000 6.650 466 1 StrenFth.' psi Elongation.' % "TETZE L" 200 t..The %c:sther-O Meter" accelerates esposure on a tw o hout Control i No esposare)

5. BOO 145 cytie.102 mirutes of wn hine plus Ib mmunes of sunshine and 3.000 hr esposure 5.740 135 ra m Ram is dntilled and 'te iumred w ater The amtnent

..TUZR" 70G-23 temperature is 145150*i it+66'Ci Specimens at: miccoon molded tenule bars. Control e No c s pusure s 11.b 90 7 T Values measured ai 73*l 123' O. 1.000 hr espusurc 8 9ti0 5 2.000 hr espesure b.3 W ~ 3.000 hr esposure b.! 10 5 me.nored at v i. <:3" Ci arier immeruon in boain, w aier WE OF W M M "Tcteel" has the abihty la perform sansfactorily while absorbing large doses of electron or gamma radiation. Table IWATER ABSORPTION' The changes produced in physical propernes by radia-tion follow the classical patur'n m that tensile str'ength is largely unchaijed. clonganon at room temperature is Marenal Absorrtion G by weight) dimmished. stif fness is mereased, especially when mea- "TLI Zr L" 200 0 029 sured at elevated temperature, and ciectncal losses are "TLI ZL L " 70c-23 0 022 '" creased. This behavmr is shown m Fn;ures 15.16 and

7, For most of the physical propt riies. changes pioduced av Amt u no uung i" s r a i r (
.s s te a are mdependent of whether radianon took place in an or o e smi siads t ui from 3" i r a i e o e m :M
  • in nitrogen. In the case of des hfe. however. a defmite di erenie cAlsls in that radiation m mirogen [lVes an o a ir si J #1 3 I (23 fi ed b o _,s m n..a,..,. m, appieaabi> gieaier ne A hie than an equal dose m an isee Figure in e

O' = 1,

.t Fi ure 15/TEFZEL *> 200 - EFFECT OF RADIATION DOSE Figure 17/TEFZEL" 200 - EFFECT OF RA01AT10N 3 ON ROOM. TEMP [RATURE TENSILE STRENGTH & 00SE ON ROOM TEMPERATURE ELECTRICAL l '-) ELONGATION RETENTION (By ASTM 0 638). Note: No PROPERTIES (ASTM 0150) t w/ rnessurable difference if the ambient atmosphere is air or I nitrogen. i I i i [w ( l i 4 I h l l

M i

l i t t 1 6 ![ l f r Figure 18/EFFECT OF AMBIEP,'T ATMOSPHERE AND HIGH ENER0Y ELECTRON RADIATION ON ROOM. Figure 16/EFFECT OF RADIATION 00SE ON FLEX MODULUS MEASURED AT T'HE IN0lCATED TEMPERATURE FLEX LIFE (MIT FLEX TEST)- TEFZEL5 200. By: ASTM 0 2176; Foldmg Endurance Test. TEMPERATURES - TEFZELE 200,(ASTM 0 790) ~ f 't MW 1 21. I 1 I i l 1 m Z!. g %) l 21 j

+ CORRDSIVITY WITH METAL Table 13/VAC UUM OUTGASSING'- Some matenals under the combined influence of mois. "TE FZEL" 200 and "TEFZEL" 2so ture and unidirectional voltage cause corrosion of metals in contact with the matenal. This tendency to cause Veight Loss (%): h corrosion may be determmed by measuring the electrical conductivity of an aqueous extract of the matenal. The Maximum 0.12'i Generally Acceptable lower the conductmty. the less is the tendency to cause Maximum 1% corrosion. Under a typical test,"Tefzel" 70G-25 gives a Minimum 0.04 % conducuvity v'ilue of S.3 compared with the value 10 normally considered to be excellent. Average

0. 07,v.,e VCMW(Volatile VACUUM OUTGASSING Condensable Material l

Under vacuum condiuons. "Tefrel" 200 and "Tefzel" Weight (%) l 2F0 give off httle gis at elevated temperatures. The loss { rate is about one tenth of the generally acceptable Maximum 0.02% Generally Acceptable i maximum rates for space craft uses. Values for "Tefzel" Maximum 0.1% j are comparable to those for " Teflon" resms. Data are given in Table 13. Minimum 0.00% Average 0.01% PERMEABILITY The values hsted below were measured using imil

  • Tut emias of esposing 30 rna specunns for 24 hours in a espenmental "Tefzel" film. The test method was ASTM hard muurn at 300T d 4N and sneasunnF weight loss and D-1434 at 25*C. and the units are cc/100 in.'. 24 hrs.

the volatile gases which are collected in hquid air traps. atm/ mil. For CO. the value is 250; for N.30; for 0, 2 2 2 100. and for He. 900. Water vapor transmission by ASTM E-% at 25*C is 1.65 g/100 in.2 24 hrs / mil. Electrical Properties "Te&c!" exhibits high resistivity and low losses. Some strength since the very high short time values achieved abwrption and merease m the dassipation factor is by "Tefzel" are not pertinent to design. The short time apparent in the 10" Hz region. The idectric constant is test of ASTM D 149 demonstrates values ranging from 2.e Compleie electrical p.operties are ; Luled in Table 1. 400 500 volts / mil (16 20 kv/mm) with 1/b" (3mm) The addinon of plaw remforcement raises the losses of Lluck specimens to 4.000 5.000 vults: mil (160000 "Tefiel" 70c-23 as would be expected. The dielectric kv/mm) with films 13 mils (25-75 micronsi thick. cor.stant nses to 3.4 and the dissipauon factor is up 10 A practical stress range for continuous operation is fold. 20 50 volts / mil (l 2 kvimm) for uses where ionization As with other matemals. exposure to radiation raises could occur. Higher values can be used if the dielectric the losses. This is cosered in detailin Figure 17. circuit is such that ionization could not occur. 1 The dalectue st ength of "Tefzel" is excellent and Tracking Resistance is abowt 70 seconds by ASTM D ce:nparable to that of polycihylene or TFE. Dielectne 495. This is sery good and comparable io materials i strength is not decreased by thermal apng until apng is considered to be nontracking, but hke other nontracking so far advanced that a phs skal break occurs in the mate. matenals (TFE and acryhes) it can be made to track nat A speafa salue is not' quoted in Table i for dieleciric under unusual conditions. Testing is recommended. 1 .1 i 1 { 0, 22 l 1 ]

i. t Optical Properties i to The index of refraction is 1.4028. measured at Sodium "D"line 589 nanometers. l Data on percent transmittance vs. wave length is given 1 in Table 14. Figure 19 shows data on ultraviolet absorption. Table 14/ % TRANSMITTANCE VS. WAVELENGTH -10.2 to Figure 19/ WAVELENGTH VS ABSORBANCE (CARY 14 l 2.4 Microns)- DAT A NORMAll2ED TO 1.0 MIL FILMS SPECTROPHDTOMETERI - TE FZEL $ 200 2.0 Mil Film. t (BE E R'S L AW) l i Wavelength (u) % Transmittance "TEFZEL" "TEFZEL" 1 l 200 280 Ultrasiolet Range 0.20 50 49 Ti -~ - 4 O.25

  • 77.5 80

.I_ 0.30 85 85 0.35 89 89 in 0A0 91 89 M. 2

    • f: 7 Visible Range j"

1 k ... ~.. 0.4 95.5 95.5 j 0.5 95.5 95.5 - ~ ' ~ ~ ~ - - - 0.6 98 95.5 0.7 98 98 j Near I.R. 0.8 95 93 \\ 1.0 - 95. 93 N 1.2 95 93 l.4 95 93 ~ ( g 9 2.0 95 93 a m m m m 2.2 91 89 2.4 91 89 I Special Properties of Interest for Wire and Cable THERMO MECHANICAL AGING TESTS I i Histoneally. temperature ratings for wire insulation have two demanding functional tests were conducted during been deternuned by long. term aging tests where the wire and after a series of exposures up to 10.000 hours at is aFed without mechanical stress or where only an initial temperatures of 135.150,165. and 180*C. 1 mechanical stress is apphed to the wire by wrapping it The first rest is desenbed as a "3/4" SUCCESSIVE j around a mandrel 10 30 times the wire diameter. Recent MANDREL BEND TEST". The procedure is as follows: research has shown that a far more severe test for plastic Each specimen is wrapped on a 3/4" mandrel (a 12 X insulationsis to combine a series of therma; and mechan-stressi and aged,on that mandrel for a predetermined ,.. O> ical stresses to the wire over extended penods of time. time. Followmg the exposure. the wire on the mandrelis i To demonstrate that wire msulated with "Tefzel"200 wet proof tested at room temperature at 2.5 kv. If it displa> s satisfactory mechanical performance at 150 C. passes the wtre is unwrapped from the mandrel and l 23

e Figure 20/SUCCESStVE - 3/4" MANDREL HE AT AGING TEST - TEFZEL 200. 3 E s posu e r Temp .f I t oo... I 5"wng"'"' N 18:T C j 6a e po h hl BAR HEIGHT REPRESENTS. i l l FR AC. TION OF TGTAL NUMBER OF $PECIMENS l / p' PASSING SUCCESSIVE M ANORE L WR AP$ 4 165' C j h PROOF TESTS h, I. d. h. m l N b CROSS MATCHED BAR y +, p - F R ACTION PA$$1NG 150 C l l [. h PROOF TEST FOLLOW h, 1 ING AGING ON 3 4" a v 4 MANOREL a ,i r l CLE AR SAR F R ACTION PAS $rNG D! ELECTRIC PROOF TEST FOLLOW-h l N ING UNWRAPPING F ROM iar C P h l 3 MANDPEL AFTER AGING /s Al b ht I 3 100 1.000 10.000 Mowrs of E apows e Figure 21/0NE TIME - IX WR AP HE AT AGING TEST - TEFZEL* 200. E nroos.,*e Te*'C l m 30 g ' n$ $j NI I -7 3 h 's-N, ^ d g fl} (/**,, me - l Qj AR HEIGHT '* PR E SE NT $ Pa FR CTsON OF SPEC uENs s

  • ,%%',,,,',P, '

ll ) PA554NG DtiLECT RIC I! i j I its c r; j }l [ I4 l FROOF TEST AF TE R

lj

[ { EXPO 5upE A I iI I I k, i

11 i

r I I t i l n CRD!$ M ATCHE D B Ah 3, N . PROOF T E S' ON <l i: L, pk { M ANDF.E l M R APPE D 1 i: [ [. $PECW[N A$ AGED 150 C r v l l I t +: 4L E A R BAR PROOF l TEST ON SAME SPE CtMEN AFTER f) ll I ,k l h [j UNWR APPING - i r p F ROM MANDPE L 135 C O [f r .s..m o o.6..*.i s os,e sc.s.t a.m.M um e r g j l, r 1 f e m aic. s t + ..mma io; i a00 a coc Mow's o' E soowe' l p= 1. 24

  • t wrapped m the opposite d:reenon. It t> agam wet proof vanes somewhat with tlame temperatuie but is alwap tested. if it passes. it is returned to the men for another wnhm the hmus of eash specilkanon for a selt-I g

espo>ure. This procedure is repe ted on each specimen extmgmshmg matenal. % hen tissue buin is specified. NM unnl it tails. Iniecrated exposure times were 64.12b. these is no igninon. A paincul.nly setete lesi is the 256. 4%.1.000. 2.500, and 10.000 bours.

7. wire, sertaal bundle test of MIE2275u 16. % re Figure 20 summanzes the results of these tests. Note insulation flammabdity test sesuh> are summanzed that 7U? of the specimens had passed the 10.000. hour below test at 150 C and JUJ were stdl surviung at 165*C atter a senes of repeated sesere thermomechameal stresses.

The abihty to pass the moni seseie serneal llame te>t Thus the 150*C ratmg is indicated. in air is sonfirmed by the General Electne Limiting The 3crond ten i> ihe "ONE TIMI. IX % RAP AFTI R Os> gen Indes. "Tetzel" requires 301 osy gen concen. l AGING TLST". The procedure is as f ollows: An npo. tranon to sustam burnmg This is higher than the 21' sme to ume and iemperature is selected. The wue is first os> gen composinon of er by a comtonable maigm. aged in strmght form for ha/r of the test nme. It is then "Terzel" is not recommended for ennched osy gen emi-wrapped about its own diameter at room temperature ta ronments. such as man,cd space c p>ules. very severe stress) and returned to the ove.i for the second half of the esposure. It is then wet proof tested at room temperature as wrapped. A second proof test is made af ter unwrappn g. The results are summarized in Figure 21. At 150*C. 75% of the specimens survived and at 165*C, 50s Fabricating Techniques survised. Agam. a 150"C ratmg is indicated. These tests were run on A%G 20 wire insulated with a 10-nul wall of "Tefzel" 07. Results will vary wnh the MELT PROCESSING stress lesel apphed to the msulanon and the manner and "Tefzel" can be proces>ed by comennonal thermo-length of tune m which it is applied. The stress level is a plastics lechniques. A wide sanety of parts have been function of the conductor size and configuration, the made by inieenon moldme. compression moldmy. tran>- fer moiding, rotational nioldmu. blow moldms, estru. msalation thickness and the mandrel diameter. The stress lesels in the above tests are moie sesere than sion and coanne. "Tetzel" filml can be thenuhformed a ty pical m>talled wne would expenence. The>e data are and heat seakd? "Tetzel" meli, ai 520"F t 270*C) but meant to assist the electrical designer m setting a because of it, high melt uscosur it is usually proce>>cd prae neal te mpera ture rating for wire insulated wnh at relativelv higli melt temperat'ures t aboul '575-650'F. "Tefzel" 200 depending on the specifies of his apph-300 340"CI. canons. Injection molded parts 01 "Terzel" 200 and "Tetzel" O K./ 230 wdl shrink about 15 20 mils meh in the direction or CUT THROUGH RESISTAfiCE resin now and about 35a5 nuivinch in the transserse I'*" }/16" ihick in AND DIELECTRIC STRENGTH' d I' 5""

  • h'" " P " h"" '

normal condinons..'"Tetzel 70n - J molded under There was no measurable change in the dielectric shrinks oniv about 2 3 milcmeh in the flow direction strength of wuc insulation or in the ability of "Terzel" and about 30 nuls/ inch in the transverse docet:on. Witile to resist cut through dunng a 10.000 hour exposure test the shrinkase of a part also depends on shape and pro-st temperatures up to 35o*F (lbO'C). On a =20 AWG eessing condn' ions. part to part umformity is excellent in copper wtre with 0.010" of insulation, the average a controlled process. cut through resistance was 46.5 lbs. as measured by an "Tefiel" in the molten stace conodes most metals. Instron operatmg at 0.2"/ minute with a blade havmg a and special corrosion resistani alloys are recommended 0 005" radras cf curvature. for prolonged operation of those parts of the equipment that contact the melt. Short term prototype runs are FLAME TESTS ON WlRE possible in standard equipment. "Tefzel" is rated "nonburning" by ASTM D 635. It is The details of melt processing of "Tefzel" are d.s-cussed in bulletins available from the Fluoiocaroons considered "self-extinguishmg" in the vanous wire tests for nammabdity. "Tefzel" passes vertical and horizontal Dimon Plastics Department, tests on msulated wtre as a smgle wire and in bundles. At tert urn, following removal of the ignition source. FORMING Forming parts at temperatures below the meh point is P 5'IDI' ", 'ili'

  • 8 ' "' '" " I * * '"I I '* i"8 '#" h"i "'

9 WIRE INSULATION Howeser this is most practical with nonreinforced FL AMMABILITY TESTS "Tefzel" and at slightly elevated temperaturn. Wire Test No. Wires Angle "Tefzel" MACHINING

1. U L ST D 8'$

1 90 Pass "Tefzel" is readily machined using the same iools and

2. Mile 81044 1

60* Pass feed rates as those normally used for nylon or acetal. Complete each cut and avoid dwelhng. For best dimen. ~~ Mil E 22759 1 60* Pass 1 A stonal stability, the part should be annealed at a temper-(,)

4. Mile 5086 1

0, Pass ature at least as high as the espected use temperature

5. Mile 22759/13 1

00 Pass before the final machme eut. 25

i -. ~. -i s = COLORING Two types of snap. fits ere: ) "Tefzel" may be pigmented usmg commercially available . A cylindrical snap fit forjoining a steel shaft and a pigments that are thermally stable at the processmg hub of " fefzel" g temperatures for the resin. Pigments may be dry blended . A cantilevered lug snap fit for insening a "Tefzel" ity with the resm. or "Tefzel" may be blended with color part into another part. j concentrates. Concentrates with a pigment loadmg of 2% i are avaiiable in pellet form from Du Pont. In a cylindrical snap fit joint the maximum stram at j the inside of the hub is the ratio of interference (!) to PRINTING diameter (x 100 for percent). A maximum stram of about 5% is suggested. Fot printing of nontreated surfaces is done using specia! ) foils in a manner similar to a typewriter ribbon. The type is heated to about 610 F and a 25 30 psi rinting pressure is applied for about 0.25 seconds. No post Max. Strain = 3 x 100 < = 5% treatment is required. 5 STRIPING For the cantilevered lug snap-fit joint, the maximum Striping on wires msulated with "Tefze. ' tlucropoiymer strain is expressed by the equation. may be accomplished using Du-Lite

  • 31 73000 fluoro-3 polymer clear er amels or others as the ink base. Ther-3 e

i mally stable pigments are required. Stripes so produced Max. Strao = y g x 100 <=57 pass the requirements of the proposed specification for wire msulanons of "Tefzel", Mile 22759/1Z (draft i 3/l/7:1(125 G. E. abraswn cycles), and of Mit M-81531-l ( AS) (20 eraser wipes). Stripes may be applied by gravure wheel type apphcators and oven cured in-line. Again, a 5% maximum strain is suggested. PRESS FIT Press fit joints are simple and inexpensive, however, the holding power is reduced with time. Creep ar.d stress relaxauon reduce the effectise interference as do Assembly Technigues temperature excursions partIcularly w hen materials wi'h j drffe,entth,,meexp,nsionsa,, joined. With "Tefzel" joined to "Tefrel", the press fit icint 'y { may be designed with an mterference resulting in strams The success of many apphcations depends on the ability of 6 7%. of "Teftel" to be economically assembled using one or more of a vanen of assemblv techmques. Some of these Interference (on diameteri x 100 S "d* " techmques suit'able for "Te fz el" composmons are bit Diameto desenbed below. More information and assistance m ) evaluatmg these for use m a specific project involving "Tetzel" is available through your Du Pont representa-if a p:rt of"Tefzel"and one of metal are to be joined, j uve. lower strain levels may be used. j Assembly can often be gnade easier by mserting a ) SCREW ASSEMBLIES cooled part into a heated huo. Self tapping screws are used for joitung parts of Teffel" Either of two types (the thread 6utung. which COLD OR HDT HE ADING j iaps a manng thread as the screw is diiven, or the thread I6 vets or studs can be used in formmg permanent f ormms whi,h mechameally displaces matenal as the mechamcal joints. The heading is accomphshed with screw i3 dovens can reduce assembly cost, special tools and preferabl> with the rivet at elevated A rule of thumb is that the boss diameier should be tempera t u res. about double the serew diameter. :rnd the engagement Formed heads tend to recover part of their ongmal length about : li: umes the screw diameter, f or maxi-shape if exposed to elevated temperatures so joints can mum holdmy power. Lubricants snould be asoided for become loose. Formmg at elevated temperatures tends j maumum sinpping turque. to reduce recovery. Threaded mseris aie also used. They can be molded m place. prcued m. or dns en in uhrasonsally. SPIN WELDING g g p, g Sptn weldirg is an effic,ient assembly techmque for Jommg cucular surfaces 01 similar materials. The match-The advamage of Snap fit joints is that the strength ui mg surfaces me rotated at hit.h speed relative to each the jomt does not dimmish with ame because of creep. other tohe surface is fbed) and then brought into The lower ductihty of "Tefeel" 70s. J sug,ests that contact. Fnenonal heat mel s the mterface and when { mher assem9 methods be used for tlus produvt. at mohon is stopped, the weld is allowed to solidify under though snap hts are possible at low strams. pressure. { } 20 1 MM.=0

t a CYLINDRICAL SN AP. FIT JOINT RETURN ANGLE RETURN ANGLE -) p-s. 0, D O s n hl [ f Y /\\ / \\ LEAD V ANGLE ' LEAo j ANGLE i SHAFT HUB CANTILEVERED LUG SNAP FIT JOINT e-L RETURN l ANGLE Ja l \\ n /} h I ] LEAD ANGLE ULTRASONIC WELDING Further details on coating application and potting The ultrasonic welding of"Tefzel"has been demonstrat. compounds are available. ed with weld strengths up to 80% of the strength of the base res'u. The success of developments involving this ADHESIVE BONDING technique 1epends upon joint design and the experirrentally-determined welding pa.ameters of con. Because of the outstanding chemical resistance of taet time and pressure. Typical welding conditions are "Tefzel", surface treatment is required to allow adhesise 25 psi coniact pressure and one or 1wo-seccad cycle bonding. Chemical etch, corona. or flame treatmenis can I time. The two b::sie joint designs are the sheer and butt be used to make surfaces of "Tefzel" receptive to joint. Both employ a small initial contact area to adhesives. Polyester and epoxy compounds are suitable. concentrate and direct the high-frequency vibrational energy-HEAT BONDING POTTING "Terzel" responds well to melt bonding. It h.as been bonded to untreated aluminum. steel, and copper with Potting of wires insulated with *Tefzel" has been peel strengths in excess of 20 lbs./in. it also can be melt accomphshed with the aid of a coating of a coUoidal bonded to itself using such techniques as hot plate sihca dispersion. Pots produced with polysulfide potting welding. compound meeting MIL S.8516 C Class 2 exhibit pull-The bond is schieved by heating the materials to out strengths of 2i' to 35 pounds. Values from 30% to $20-530*F then pressing the parts together during 50% of these can be obtained with untreated wires. cooling. ya 27

j >e Safe Handling and p,0 cessing of Tenon Fee be,eiim.<d mheu handbng or processing "Tefiel" As with all organic polymers exposed to high temper. There has been extensive industrial experience in the atures. good safety practice requires the use of adequ.ne g j safe handling of " Teflon" TFE cnd "Te00n" FEP fluoro-ventilation. The heated Onoropoly mer should be Lepi carbor, resins. Extensive expenence with a new product enclosed or exhaust ventilaison should be used in pre. such as "Tefzel" is, of ccurse, lacking. Initial tests in ex. vent the inhalation of fumes and gases Ihat may anse. posing rcts to the pyrolyr s decompottion produ ts of Heating may produce fumes and gases that are trntating i "Tefz.el" at 752* F (40(PC) suj; gest a close comparison or toxic. Similarly, care should be taken to avoid j with "TcDon" FEP. Accordingly,it is recommended that contamination of smoking lobacco or cigarettes with aD safety precautions taken with respect to safe handhng Guonne.containing resms. l l l j ).; i ) l t as I 4 I 28 2

.g 6 0 O O" The Du Pont Comp.iny assumes no obligation or habihty for any advice furnished by it, or for results obtained a sth espect to thesc products. All such advece is gnen and accepted at the buyer's risk. Du Pont warrants that the materials it wils do not mfnnye the claims of any Ur.ited States patent;but no license is implied nor is any further patent warranty made.

't L. L / Cf C), G 4 y OLr Muu Lort g

5) d ca

/QL ~ ~.. E.1. DU PONT DE NEMOURS & CO. (INC.) - POLYMER PRODUCTS DEPARTMENT WILMINGTON, DELAWARE 19898 4 Sales Offices l Concord P'aza 7250 N. Cicero Ave. 80 Universal City Plaza Talley Bldg. Lincolnwood Suite 400 Wilmington, DE 19898 Chicago. IL 60646 P.O. Box 8950 (302) 772-5000 (312) 982-4058 Universal City. CA 91608 (213) 985-8560 IN EUROPE IN FAR EAST Du Pont de Nemours Mitsui Fluorochemicals Co., LTD International, S.A. Mitsul Seimei Bldg 7th Floor l RO. Box CH-1211 2-3 Ohtemachi,1-chome . Geneva 24, Switzerland Chiyoda-ku - Tokyo 100. Japan l l i 0- : 1T ee a *w e 3 31301 Prmted M the United StaWes of America e}}

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