ASTMD4745.pdf
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1、/ITT _tlH|ilp Designation:D 4745-06(lltl.Vltlalt,NTE3,tATONALStandard Specification for1.Scope*l.l This specification covers polytetrafluoroethyleneGTFE)filled molding compounds made with virgin PTFEresins defined in Specification J-)4$94,except Types I,IY Vand VI.Norl;l-This specifioation can be us
2、ed as a model lor other PTFEcompounds having particulate fillers that can survive the sinteringtemperatures of FrlltrE as can those listed in this specification.Thisspecilication is restricted to virgin PTtrE base resin for technical leasons.Recycled or reprocessed matedal cannot be processed succes
3、slully.Nors 2-The properties measured on commercially labricated partsrnay differ frorn the listed values for santples prepared by the proceduresgiven in this specification,depending on part geomelry and processingparameters.Nors 3-There is no ISO equivalent to this specification.1.2 The values stat
4、ed in SI units are to be regarded asstandard.1.3 The following statement applies to the test methodportion,Section 1 j,of this specification:This stundard dctesnat purport to address all of the sufery concerns,if any,associated*ith its use.If is the responsibilitt of the user ttf this,ttandatd to es
5、tabli,sh ctppropriate safe4t 6714 heaLth practice,sand determine the applicabilin-o.f regulatory Limitations priorta,use.See i.5 and Nalc.1 itrr a specific warning statement.2.Referenced Documents2.1 ASTM Stundurtls:2I)L:1S Practice lbr Conditioning Plastics for TestingI.):.8 Test Method for Tensile
6、 Properties of Plasticsl.)l*)Test Methods for Density and Specific Gravity(Rela-tive Density)of Plastics by Displacementl)8Bt Terminology Relating to PlasticsI This speciication is under the.jurisciiction ol ASTM Ci:mmittee I)20 onPlastics and is the direct responsibility of Subcommittee D20.15 on T
7、hernloplasficMaferials.Current edition approved Dec.l.2006.Published December 2006 Originallyapproved in 1991.Last previous edition approved in 2001 as D4745-01I For referenced ASTM standards.visit the ASTM website.www.astnl.org,orcontact ASTM Customer Service at sewiceasttrt.org,Por Annuol Rook of
8、ASTMStandarcls volLrme infbrmation,refer to the standards Documenl Strmmary page onthe ASTM website.l)160 Terminology for Abbreviated Terms Relating toPlasticsD l8t-5 Test Methods for Apparent Density,Bulk Faotor,and Pourability of Plastic Materials).189 Practice for Packaging/Packing of Plasticstli
9、.$8q4 Speciication for Polytetrafluoroethylene(PTFE)Cranular Molcling and Ram Extrusion MaterialsD 5140 Guide fbr Writing Material Standards in the Clas-sifrcation D 4000 FormatE I I Speciflcation for Wire Cloth and Sieves for TestingPurposesE 691 Practice for Condrrcting an Interlaboratory Study to
10、Determine the Precision of a Test MethodIEEE/ASTM SI-10 Standard for Use of the Internationalsysrem of units(SI):The Modern Metric systenrl3.Terminology3.1 DeJinitions-The terminology given in Terminologyi-$itr is applicable to this specification unless otherwisespecifiecl.3.2 Definitiorts of Terms
11、Specifc to This Standard:3.2.1 bulk density,n-the mass in kilograms per cubicmetre oi resin compound measured under the conditions of thetest.3.2.2 filled compound,n-blend of PTFE resin as the rnatrixand particulate fillers,generally glass,other inorganic,metal-lic,or polyneric materials that withst
12、ancl the sintering tem-perature of PTFE(321 to 380C).3.2.3 free-flow-resins(pelletiz,ed),n-generally made bytreatment of linely divided resins to produce iiee-flowingagglonerates.3.2.4 lot,n-one production run or a uniform blend of twoor more production runs.3.2.5 pigmerfied contpound,n-a compound i
13、n which apigrnent is added for colorant purposes only.3.2.6 s t anda rd flov,re s ins(no n p e I le tize d),n-finely di vi dedresin with an average parlicle size less than 100 pm.iAvailable fiom ASTN4 International Heaclctuarters,100 tsanWest Conshohocken.PA 19428Sold loilHS Standards Store Purchase
14、,412573Nol for Resale.02105/2008 07r48i33 lrSTFilled Compounds of Polytetrafluoroethylene(PTFE)Molding and Extrusion MaterialslThis standard is issued under the fixed designation D 4745;the number immediately tbllorving(he Llesignation indicates the year otoriginal adoption or,in the case of revisio
15、n.the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indrcates an editorial changc since the lasl revision or reapprovalxA Summary of Changes section appears at the end of this standard.Copyright O ASTIM lnternational,1 00 Barr Harbor Drive
16、.PO Box C700,West Conshohocken,PA 1 9428-2959,United States.pyfight ASTM Inlernalional)vided by IHS under license wih ASTMrepfoduclion or nelworking pemitted withoul license from IHSHarbur Drive,($Jp o 474s-ooTABLE 1 TFE Compounds,Type l,Standard Flow(Nonpelletized)Molded Parts(Molded and Sintered)R
17、aw ResinBulk Density,min,g/LSpecilicGravity,SpecificGravity,min maxTensile StrengthElongatron,min,%min,MPamrn,psl123A567815%glass fiber25%glass fiber35%glass fiber5%glass flber and 5%MoS,15 9o glass fiber and 5%MoSz10%graphite15%graphrte25 L carbon and graPhite32 ok ca(bon and graphlte4O/bronze60 k
18、b(onze55 ok brcnze and 5%MoS250%stainless steel4004254503503753503003503255006507005002.1502.1 502.2002.1 502.1502.1 002.1001,9501.9002.9003.8003,5003.2002.252.2502.3002.3002.3002.2002.1002.1 003.2004.0004.0003.60019.615.710.320.717.217,9to.o11.06.917.213.810.317.2284022741500300025002600240Q1 6001
19、000250020001 50025002502001502502002251008050175140BO1501011IJ3.3 Abbretiations-Lbbreviations are in accordance withTerminology ll i(dX)PTFE is lhe acronym for polytetrailuo-roethylene.4.Classification4.1 This specification covers the following two types ofPTFE compounds:4.1.1 Tr-pe 1-Nonpelletized
20、material,for general-putposecompression molding.4.1.2 hpe/I-Pelletized or free-flowing material for mold-ing.automatic molding,or ram extrusion4.2 Thirteen grades of each type distinguished by the natureof the filler(s)are listecl in Tnbk:s 1-14.3 A one-line system may be used to specily materialsco
21、vered by this specification.The system uses predefined cellsto refer to specifii aspects of this specification as the followingillustrates:Specf ication;SPecialBlock:Notes5.Ordering Information5.1 The filled compounds of PTFE uray be ordered using thetype,(see 4.1)and the gracle(see reference lirbi*
22、I and Tabls:),o.*t.y may be orclerecl using the designation of thesuppliers.6.Requirements6.1 The PTFE compounds covered by this specificationshallbeunilbrm(fillerarrdresinparticlesevenlydistributed)and shall contain no foreign material.6.2 The PTFE compounds shall conform to the requtre-ments presc
23、ribed iniilb:s l-:i when tested by the proceduresspecifiid herein.1ahlc I andIlrblu:i list recluirements for Typet.lrUc I and f*hlc I reference requirements for Type II6.3 Other PTFE cornpounds are commercially available butare not described in this specification.7.Sampling7.1 Sampling shall be stat
24、istically adequate to satisfy therequirements of|3.-18.Number of Tests8.1 Routine lot inspection tests shall consist ofthose carriedout to determine the requirements specified in.Ilii:lc or,lli.llle:.1 depending on type.Periodic tests shall include using all thetests to determine the requirements in
25、 lnbl*-1,depending ontype.8.2 The requirements listed inirrlcs-11,as they apply aresufftcient to establish conforrnity of a material to this specifi-cation.Whenthenumberoftestspecimensisnotstatedinthetest rnethocl,single determinations may be made If more thansingle determinations are made on specim
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