1、Designation:D70620Standard Classification System and Basis for Specifications forCellulose Acetate Molding and Extrusion Compounds(CA)1This standard is issued under the fixed designation D706;the number immediately following the designation indicates the year oforiginal adoption or,in the case of re
2、vision,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 classificatio
3、n system covers requirements for cel-lulose acetate thermoplastic compounds plasticized with eitherdiethyl phthalate or dimethyl phthalate and are suitable forinjection molding and extrusion.These compounds have anacetyl content between 39 and 40%.It does not includematerials compounded for special
4、application.Cellulosic plas-tic materials,being thermoplastic,are reprocessable and recy-clable.This classification system allows for the use of thosecellulosic materials,provided that all specific requirements ofthis classification system are met.1.2 The properties included in this classification s
5、ystem arethose required to identify the compositions covered.Otherrequirements necessary to identify particular characteristicsimportant to specialized applications are specified by using thesuffixes as given in Section 5.1.3 This classification system and subsequent line call out(specification)are
6、intended to provide a means of calling outplastic materials used in the fabrication of end items or parts.It is not intended for the selection of materials.Materialselection can be made by those having expertise in the plasticfield only after careful consideration of the design and perfor-mance requ
7、ired of the part,environment to which it will beexposed,fabrication process to be employed,costs involved,and inherent properties of the material other than those coveredby this classification system.1.4 The values stated in SI units are to be regarded asstandard.1.5 The following safety hazards cav
8、eat pertains only to thetest method 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 practi
9、ces and determine the appli-cability of regulatory limitations prior to use.NOTE1There is no known ISO equivalent to this standard.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for
10、 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:2D256 Test Methods for Determining the Izod PendulumImpact Resistance of PlasticsD570 Test Method for Water
11、Absorption of PlasticsD618 Practice for Conditioning Plastics for TestingD635 Test Method for Rate of Burning and/or Extent andTime of Burning of Plastics in a Horizontal PositionD638 Test Method for Tensile Properties of PlasticsD790 Test Methods for Flexural Properties of Unreinforcedand Reinforce
12、d Plastics and Electrical Insulating Materi-alsD792 Test Methods for Density and Specific Gravity(Rela-tive Density)of Plastics by DisplacementD883 Terminology Relating to PlasticsD1003 Test Method for Haze and Luminous Transmittanceof Transparent PlasticsD1600 Terminology forAbbreviated Terms Relat
13、ing to Plas-ticsD1729 Practice for Visual Appraisal of Colors and ColorDifferences of Diffusely-Illuminated Opaque MaterialsD3641 Practice for Injection Molding Test Specimens ofThermoplastic Molding and Extrusion MaterialsD3892 Practice for Packaging/Packing of PlasticsD4000 Classification System f
14、or Specifying Plastic Materi-alsD5740 Guide for Writing Material Standards in the Classi-fication FormatE308 Practice for Computing the Colors of Objects by Usingthe CIE System1This classification system is under the jurisdiction ofASTM Committee D20 onPlastics and is the direct responsibility of Su
15、bcommittee D20.15 on ThermoplasticMaterials.Current edition approved Aug.1,2020.Published August 2020.Originallyapproved in 1943.Last previous edition approved in 2015 as D706-15.DOI:10.1520/D0706-20.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service a
16、t serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.*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 of Internation
