1、Designation:D70715Standard Classification System and Basis for Specification forCellulose Acetate Butyrate Molding and ExtrusionCompounds(CAB)1This standard is issued under the fixed designation D707;the number immediately following the designation indicates the year oforiginal adoption or,in the ca
2、se 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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 This class
3、ification system covers requirements for plas-ticized cellulose acetate butyrate thermoplastic compoundssuitable for injection molding and extrusion.These compoundshave a butyryl content less than 38%and an acetyl content lessthan 15%and can contain dyes and pigments.This classifica-tion system does
4、 not include special materials compounded forspecial applications.Cellulosic plastic materials,beingthermoplastic,are reprocessable and recyclable.This classifi-cation system allows for the use of those cellulosic materials,provided that all specific requirements of this classificationsystem are met
5、.1.2 The properties included in this classification system 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 s
6、ystem and subsequent line call out(specification)are 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 care
7、ful consideration of the design and perfor-mance required 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 reg
8、arded asstandard.1.5 The following safety hazards caveat pertains only to thetest method portion,Section 12,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 establi
9、sh appropriate safety andhealth practices and determine the applicability of regulatorylimitations prior to use.NOTE1There is no known ISO equivalent to this standard.2.Referenced Documents2.1 ASTM Standards:2D149 Test Method for Dielectric Breakdown Voltage andDielectric Strength of Solid Electrica
10、l Insulating Materialsat Commercial Power FrequenciesD256 Test Methods for Determining the Izod PendulumImpact Resistance of PlasticsD257 Test Methods for DC Resistance or Conductance ofInsulating MaterialsD570 Test Method for Water Absorption of PlasticsD618 Practice for Conditioning Plastics for T
11、estingD635 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 Reinforced Plastics and Electrical Insulating Materi-alsD792 Test Methods fo
12、r 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 Relating to Plas-ticsD1729 Practice for Visual Appraisal of Colors and C
13、olorDifferences of Diffusely-Illuminated Opaque MaterialsD3641 Practice for Injection Molding Test Specimens ofThermoplastic Molding and Extrusion MaterialsD3892 Practice for Packaging/Packing of PlasticsD4000 Classification System for Specifying Plastic Materi-als1This classification system is unde
14、r the jurisdiction ofASTM Committee D20 onPlastics and is the direct responsibility of Subcommittee D20.15 on ThermoplasticMaterials.Current edition approved May 1,2015.Published June 2015.Originallyapproved in 1943.Last previous edition approved in 2005 as D707-09.DOI:10.1520/D0707-15.2For referenc
15、ed 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 Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM
16、 International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 D5740 Guide for Writing Material Standards in the Classi-fication FormatD7209 Guide for Waste Reduction,Resource Recovery,andUse of Recycled Polymeric Materials and Products(With-drawn 2015)3E308 Practice for Computing the Colors of Objects by Usingthe CIE System3.Terminology3.1 DefinitionsThe terminology used in this classificationsystem is in accordance with Terminologies D883 and D1600.4.Classifica
