1、Designation:D 4550 98Standard Classification forThermoplastic Elastomer-Ether-Ester(TEEE)1This standard is issued under the fixed designation D 4550;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number i
2、n parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.INTRODUCTIONThis classification is intended to be a means of calling out mat
3、erials used in the fabrication of enditems or parts.It is not intended for the selection of materials.Material selection should be made bythose having expertise in the plastics field after careful consideration of the design and theperformance required of the part,the environment to which it will be
4、 exposed,the fabrication processto be employed,the inherent properties of the material other than those covered by this specification,and the economics.1.Scope1.1 This classification covers segmented block copolyether-ester elastomers suitable for molding and extrusion.Thisclassification allows for
5、the use of segmented blockcopolyether-ester elastomers that are recycled,reconstituted,recycled-regrind,recovered,or reprocessed,or a combinationthereof,provided that the requirements as stated in thisclassification are met.It is the responsibility of the supplier andthe buyer of recycled,reconstitu
6、ted,recycled-regrind,recov-ered,or reprocessed,or a combination thereof,copolyether-ester elastomers to ensure compliance(see Guide D 5033).1.2 The properties included in this classification are thoserequired to identify the compositions covered.There may beother requirements necessary to identify p
7、articular character-istics important to specialized applications.These may bespecified using the suffixes as given in Section 5.1.3 This classification system and subsequent line callout(specification)are intended to provide a means of calling outplastic materials used in the fabrication of end item
8、s or parts.It is not intended for the selection of materials.Materialselection should be made by those having expertise in theplastic field after careful consideration of the design and theperformance required of the part,the environment to which itwill be exposed,the fabrication process to be emplo
9、yed,thecosts involved,and the inherent properties of the material otherthan those covered by this classification.1.4 The following precautionary caveat pertains only to thetest methods portion,Section 11 of this classification:Thisstandard does not purport to address all of the safety concerns,if an
10、y,associated with its use.It is the responsibility of the userof this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.NOTE1This classification system is similar to ISO FDIS 14910-1/-21997,although the technical cont
11、ent is significantly different.NOTE2This classification system is being revised to add internationalspecimens and test procedures as the standard for compliance.Theprevious test specimens and Tables TEEE and A are included in AppendixX1 as a reference for those wishing to use them.It is recommended
12、thatthe material manufacturer be consulted on all callouts against thisclassification system.2.Referenced Documents2.1 ASTM Standards:D 618 Practice for Conditioning Plastics and ElectricalInsulating Materials for Testing2D 638M Test Method for Tensile Properties of PlasticsMetric2D 790 Test Method
13、for Flexural Properties of Unreinforcedand Reinforced Plastics and Electrical Insulating Materi-als2D 883 Terminology Relating to Plastics2D 1238 Test Method for Flow Rates of Thermoplastics byExtrusion Plastometer2D 1600 Terminology for Abbreviated Terms Relating toPlastics21This specification is u
14、nder the jurisdiction of ASTM Committee D-20 onPlastics and is the direct responsibility of Subcommittee D20.15 on ThermoplasticMaterials.Current edition approved March 10,1998.Published February 1999.Originallypublished as D 4550 86.Last previous edition D 4550 92e1.2Annual Book of ASTM Standards,V
15、ol 08.01.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.D 2240 Test Method for Rubber PropertyDurometerHardness3D 3418 Test Method for Transition Temperatures of Poly-mers by Thermal Analysis4D 3641 Practice for Injection Molding Test Sp
16、ecimens ofThermoplastic Molding and Extrusion Materials4D 3892 Practice for Packaging/Packing of Plastics4D 4000 Classification System for Specifying Plastic Mate-rials4D 5033 Guide for the Development of Standards Relating tothe Proper Use of Recycled Plastics5D 5630 Test Method for Ash Content in Thermoplastics5E 29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specification62.2ISO Standards:7ISO 178 1993 PlasticsDetermination of Flexural Prop-ertiesISO 294-1
