1、Designation: D8156 18Standard Classification System for and Basis of SpecificationsforThermoplastic Elastomer Copolyester Molding andExtrusion Materials (TPC)1This standard is issued under the fixed designation D8156; the number immediately following the designation indicates the year oforiginal ado
2、ption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This classification system covers segmented block co-polyester elastome
3、rs suitable for molding and extrusion.1.2 This classification system allows for the use of seg-mented block copolyesther elastomers that are recycled pro-vided that the requirements as stated in this classificationsystem are met. The proportions of recycled material used, aswell as the nature and am
4、ount of any contaminant, however,cannot be covered practically in this specification.1.3 The properties included in this classification system arethose required to identify the compositions covered. It ispossible that there are other requirements necessary to identifyparticular characteristics impor
5、tant to specialized applications.One way of specifying them is by using the suffixes as given inSection 5.1.4 This classification system and subsequent line callout(specification) are intended to provide a means of calling outplastic materials used in the fabrication of end items or parts.It is not
6、intended for the selection of materials. Materialselection is best made by those having expertise in the plasticfield after careful consideration of the design and the perfor-mance required of the part, the environment to which it will beexposed, the fabrication process to be employed, the costsinvo
7、lved, and the inherent properties of the material other thanthose covered by this classification system.1.5 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.6 The following precautionary caveat pertains only to thetest methods
8、portion, Section 11, of this classification system.This standard does not purport to address all of the safetyconcerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety,health, and environmental practices and determine the appli-ca
9、bility of regulatory limitations prior to use.NOTE 1This standard, ISO 14910-1, and ISO 14910-2 address thesame subject matter, but differ in technical content.1.7 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in t
10、he Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:D618 Practice for Conditioning Plastics for TestingD883 Terminology Relatin
11、g to PlasticsD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD2240 Test Method for Rubber PropertyDurometer Hard-nessD3418 Test Method for Transition Temperatures and En-thalpies of Fusion and Crystallization of Polymers byDifferential Scanning CalorimetryD3641 Practice for Injection Mol
12、ding Test Specimens ofThermoplastic Molding and Extrusion MaterialsD3892 Practice for Packaging/Packing of PlasticsD4000 Classification System for Specifying Plastic Materi-alsD7209 Guide for Waste Reduction, Resource Recovery, andUse of Recycled Polymeric Materials and Products (With-drawn 2015)2E2
13、9 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications2.2 ISO Standards:ISO 294-1 PlasticsInjection Moulding of Test Specimensof Thermoplastic MaterialsPart 1: General Principlesand Moulding of Multipurpose and Bar Test SpecimensISO 868 Plastics and Ebonite-
14、Determination of IndentationHardness by Means of a Durometer (Shore Hardness)1This test method is under the jurisdiction of ASTM Committee D20 on Plasticsand is the direct responsibility of Subcommittee D20.15 on Thermoplastic Materi-als.Current edition approved June 1, 2018. Published July 2018. DO
15、I:10.1520/D8156-18.2The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recogni
16、zed principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1ISO 1133 Plastics-Determination of the Melt Mass-FlowRate (MFR) an
17、d the Melt VolumeFlow Rate (MVR) ofThermoplasticsISO 11357-3 AMD 1 Plastics-Differential Scanning Calo-rimetry (DSC)Part 3: Determination of Temperatureand Enthalpy of Melting and CrystallizationISO 7619:2010 Rubber, vulcanized or thermoplasticDetermination of indentation hardnessPart 1: Durom-eter
18、method (Shore hardness)ISO 14910-1 Plastics-Thermoplastic Polyester/ester andPolyether/ester Elastomers for Moulding and Extrusion-Part 1: Designation System and Basis for SpecificationsISO 14910-2 Plastics-Thermoplastic Polyester/ester andPolyether/ester Elastomers for Moulding and ExtrusionPart 2:
19、 Preparation of Test Specimens and Determinationof Properties3. Terminology3.1 DefinitionsThe terminology used in this classificationsystem is in accordance with Terminologies D883 and D1600.4. Classification4.1 Thermoplastic copolyester elastomers are classified intogroups in accordance with the ma
20、terial chemical structure.These groups are subdivided into classes by Hardness and withit, as the result of some relationship with modulus, Flexibility,and are further subdivided into grades by melting point andmelt mass-flow rate, as shown in the Table 1 TPC Group, Table2 TPC Classification, and Ta
21、ble 3 Property requirements.4.1.1 There are no callout-lines included in this standard. Adesignation, a callout-line, is drawn up by using Tables 1-4 asbuilding blocks (see Tables 1-4 and Fig. 1).NOTE 2Drawing up callout lines by using Tables 1-4 as buildingblocks implies that addition of new callou
22、t lines is not necessaryanymore. In case of addition of a new TPC type, only the new materialtype need to be added to Table 1.4.1.2 To facilitate the incorporation of future or specialmaterials, the category unspecified (0) is shown in the TableTPC group.4.2 Reinforced, filled, and/or lubricated ver
23、sions of thePolyester copolymer materials are classified in accordance withTables TPC Group, TPC Classification and TPC Requirements.Table A is used to specify the addition of reinforcements orlubricants at the nominal level indicated (see 4.2.1).TABLE A Reinforcements and LubricantsSymbol Material
24、ToleranceC carbon and graphitefiber2 %G glass 2 %L lubricants (for example,PTFE, graphite,silicone, andmolybdenum disulfide)depends upon materialand processto bespecifiedM mineral 2 %R combination ofreinforcements or fillers,or both3 %4.2.1 Reinforced, filled, and/or lubricated versions of thebasic
25、materials are identified by a single letter that indicates thereinforcement or filler used and two digits that indicate thenominal quantity in percent by weight. Thus, a letter designa-tion G for glass-reinforced and 33 for % of reinforcement, G33,specifies a filled material with a nominal glass lev
26、el of 33 %.The reinforcement letter designations and associated tolerancelevels are shown in the following table:NOTE 3This part of the classification system uses the percent ofreinforcements or additives, or both, in the control of the modified basicmaterial. The types and percentages of reinforcem
27、ents and additives aresometimes shown on the suppliers technical data sheet. If necessary,additional callout of these reinforcements and additives can be accom-plished by the use of the suffix part of the system (see Section 5).NOTE 4Examples of an unfilled and filled Thermoplastic copolyesterelasto
28、mer of this classification system can be found in Table 5.5. Suffixes5.1 When additional requirements are needed that are notcovered by the basic requirements or cell-table requirements,they shall be indicated through the use of suffixes.5.2 A list of suffixes can be found in Classification D4000(Ta
29、ble 3) and can be used to indicate additional requirements asappropriate. Additional suffixes will be added to that classifi-cation system as test methods and requirements are developedand requested.6. General Requirements6.1 Basic requirements from the property or cell tables arealways in effect un
30、less superseded by specific suffixrequirements, which always take precedence.6.2 The plastics composition shall be uniform and shallconform to the requirements specified herein.TABLE 1 TPC GroupTPC GroupAbbreviationBlockISO ASTM1 TPC-ES Polyester soft segment2 TPC-ET TEEE Polyether soft segment3 TPC
31、-EA Alkane soft segment0 Unspecified UnspecifiedD8156 1827. Detail Requirements7.1 The materials shall conform to the requirements inTables 1 through 4 and A, and suffix requirements as theyapply.7.2 For the purpose of determining conformance, all speci-fied limits for a specification (line callout)
32、 based on thisclassification system are absolute limits, as defined in PracticeE29.7.3 With the absolute method, an observed value or acalculated value is not rounded off, but is to be compareddirectly to the specified limiting value. Conformance or non-conformance is based on this comparison.8. Sam
33、pling8.1 Sampling shall be statistically adequate to satisfy therequirements of 12.4.TABLE 2 Class TPC Hardness ClassificationAHardness Test Method UnitsCell Limits00 ValueMinimum ASTM D2240 Type D, 15 s Not specified Specify valueMaximum ASTM D2240 Type D, 15 s Not specified Specify valueAFor this
34、standard, ASTM D2240, Type D and ISO 7619, Shore D, 15 seconds measurement time, are assumed to give comparable Hardness test results.TABLE 3 Grade TPC Property RequirementsAProperty TestStandardUnitCell Limits0123456789Meltingpoint(minimum)ISO11357-3C Unspecified 145 155 165 175 185 195 205 215 Spe
35、cifyvalueMeltmass-flow rate(minimum)ISO1133g/10 min Unspecified 0.5 1 2 5 10 20 40 80 SpecifyvalueAThe material shall be dried according to the instructions of the material supplier. If no drying conditions are specified the material may be dried for 16-24 h at 110 C -120 C or 2h at 150 C in a dehum
36、idifier prior to testing. It should be noted that drying at a temperature of 150 C might change the properties of some materials. For themelt mass-flow rate determination, the moisture content after drying should be equal or less than 0.02 % moisture.TABLE 4 Melt Mass-Flow Rate Determination Test Co
37、nditionsLoad, KgTemperature, C190 220 230 240 2502.16 11 12 13 14 155 212223242510 31 32 33 34 3521.6414243444FIG. 1 Drafting Callout-line TPC2-4256-57-23 using Table 1 through Table 4D8156 1838.2 A batch or lot shall be constituted as a unit of manufac-ture as prepared for shipment and can consist
38、of a blend of twoor more “production runs.”9. Specimen Preparation9.1 The test specimens shall be molded in accordance withISO 294 and Practice D3641. Recommended processing con-ditions are shown in Table 6.10. Conditioning10.1 Test specimens shall be conditioned in the standardlaboratory atmosphere
39、 in accordance with Procedure A ofPractice D618 before performing the required tests.10.2 Conduct tests, other than MFR, in the standard labo-ratory atmosphere of 23 C and 50 % relative humidity.11. Test Methods11.1 Determine the properties enumerated in this classifica-tion system by means of the t
40、est methods referenced in Section2.11.1.1 The number of tests shall be consistent with therequirements of Section 8 and 12.4.12. Inspection and Certification12.1 Inspection and certification of the material suppliedwith reference to a specification based on this classificationsystem shall be for con
41、formance to the requirements specifiedherein.12.2 Lot-acceptance inspection shall be the basis on whichacceptance or rejection of the “lot” is made. The lot-acceptanceinspection shall consist of the tests listed as they apply:12.2.1 Mass-flow rate.12.2.2 Reinforcement content.12.3 Periodic-check ins
42、pection with reference to a specifi-cation based upon this classification system shall consist of thetests specified for all requirements of the material under thespecification. Inspection frequency shall be adequate to assurethe material is certifiable in accordance with 12.4.12.4 Certification sha
43、ll be that the material was manufac-tured by a process in statistical control, sampled, tested andinspected in accordance with this classification system and thatthe average values for the lot meet the requirements of thespecification line callout.NOTE 5The ASTM publication, Manual on Presentation o
44、f Data andControl Chart Analysis, 7th Edition, stock number MNL7A, providesdetailed information about statistical process control.12.5 Reports of the test results shall be furnished whenrequested. The report shall consist of results of the lotacceptance inspection for the shipment; the percent by we
45、ightof recycled plastic, as defined in 3.1.47 of Guide D7209,ifrequested, and results of the most recent periodic checkinspection.13. Packaging, Packing, and Marking13.1 The provisions of Practice D3892 apply to packaging,packing, and marking of containers for plastic materials.14. Keywords14.1 clas
46、sification; classification system; copolyester; elas-tomers; line callout; recycle; specificationTABLE 5 Examples of Unfilled and Filled Thermoplastic Copolyester ElastomerASTM D2240, Type D Hardness ASTM D2240, Type D Hardness ASTM D2240, Type D Hardness- minimum 42 - minimum 42 - minimum no specif
47、ication- maximum 56 - maximum no specification - maximum 56The designation TPC2-4256-57-23 would indicatethe following material:The designation TPC2-4200-57-23-C10 wouldindicate the following material:The designation TPC2-0056-57-23 would indicatethe following material:TPC = Thermoplastic copolyethe
48、r TPC = Thermoplastic copolyester TPC = Thermoplastic copolyesterGroup Group Group2 = Polyether soft segment - ET 2 = Polyester soft segment - ET 2 = Polyester soft segment - ETClass Class Class42 = Minimum Hardness 42 = Minimum Hardness 00 = Minimum Hardness42 - Type D 42 - Type D - Type D not spec
49、ified56 = Maximum Hardness 00 = Maximum Hardness 56 = Maximum Hardness56 - Type D - Type D not specified 56 - Type DGrade Grade Grade5 = Minimum melting point 185 C 5 = Minimum melting point 185 C 5 = Minimum melting point 185 C7 = Minimum melt mass-flow rate 40 g/10 min 7 = Minimum melt mass-flow rate 40 g/10 min 7 = Minimum melt mass-flow rate 40 g/10 min23 = Measured at 230 C / 5 Kg 23 = Measured at 230 C / 5 Kg 23 = Measured at 230 C / 5 KgC10 = Carbon filler 10 % nominal (see 4.2.1)TABLE 6 Conditions for Injection Molding o
