1、Designation:D393521Standard Classification System and Basis for Specification forPolycarbonate(PC)Unfilled and Reinforced Material1This standard is issued under the fixed designation D3935;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revis
2、ion,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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 This classification s
3、ystem covers unfilled and reinforcedpolycarbonate and polycarbonate copolymer materials suitablefor injection molding,blow molding,and extrusion.Some ofthese compositions may also find use for compression moldingor application from solution.This classification system allowsfor the use of recycled ma
4、terials provided that all specificationrequirements are met.1.2 The properties in this classification system are thoserequired for identifying the compositions covered.Other re-quirements necessary for identifying particular characteristicsimportant to specific applications are normally specified by
5、using the suffixes in accordance with Section 5.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 This classification system and subsequent line callout(specification)are intended to provide a means of calling outplastic ma
6、terials used in the fabrication of end items or parts.It is not intended for the selection of materials.Materialselection should be made by those having expertise in theplastic field only after consideration of the design and theperformance required of the part,the environment to which itwill be exp
7、osed,the fabrication process to be employed,thecosts involved,and the inherent properties of the material otherthan those covered in this standard.NOTE1This classification system and ISO 21305-1 and ISO 21305-2address the same subject matter,but differ in technical content.1.5 The following precauti
8、onary caveat pertains only to thetest methods portion,Section 12,of this classification sys-tem.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 environme
9、ntal practices and determine the appli-cability of regulatory limitations prior to use.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,G
10、uides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D256 Test Methods for Determining the Izod PendulumImpact Resistance of PlasticsD638 Test Method for Tensile Properties of PlasticsD648 Test Method for
11、 Deflection Temperature of PlasticsUnder Flexural Load in the Edgewise PositionD790 Test Methods for Flexural Properties of Unreinforcedand Reinforced Plastics and Electrical Insulating Materi-alsD792 Test Methods for Density and Specific Gravity(Rela-tive Density)of Plastics by DisplacementD883 Ter
12、minology Relating to PlasticsD1238 Test Method for Melt Flow Rates of Thermoplasticsby Extrusion PlastometerD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD2584 Test Method for Ignition Loss of Cured ReinforcedResinsD3892 Practice for Packaging/Packing of PlasticsD4000 Classification Sy
13、stem for Specifying Plastic Materi-alsD5630 Test Method for Ash Content in PlasticsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE169 Practices for General Techniques of Ultraviolet-VisibleQuantitative Analysis2.2 ISO Standard:3ISO 21305-1 Plastics
14、Polycarbonate(PC)Moulding andExtrusion MaterialsPart 1:DesignationSystem and1This standard 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 Dec.1,2021.Published December 2021.Origin
15、allyapproved in 1980.Last previous edition approved in 2015 as D3935-15.DOI:10.1520/D3935-21.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summa
16、ry page onthe ASTM website.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment
