1、-9009276 O008852 T40 Designation:D 2853-81 4 C T b AMERICAN SOCIETY FOR TESTING AND MATERIALS 1916 Race St.,Philadelphia,Pa.19103 Reprinted from the Annual Book of ASTM Standards,Copyright ASTM If not listed in the current combined index,will appear in the next edition.Standard Specification for REI
2、NFORCED OLEFIN INJECTION MOLDING AND EXTRUSION MATERIALS This standard is issued under the fixed designation D 2853;the number immediately following the designation indicates the year of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year
3、 of last reapproval.A superscript epsilon(E)indicates an editorial change since the last revision or reapproval.1.Scope 1.1 This specification covers reinforced ole-fin polymers suitable for injection molding or extrusion.Polymers consist of propylene ho-mopolymers,ethylene homopolymers,or co-polyme
4、rs of either,to which have been added various other materials or combinations of ma-terials to serve as reinforcements from the group including glass fibers,talc,and asbestos.1.2 This specification provides for the divi-sion of reinforced materials into groups based on physical properties.The proper
5、ties used are tensile strength,flexural modulus,Izod impact strength,and deflection temperature under load.NOTE 1-The properties included in this specifi-cation are those required to identify the types and grades of materials covered.There may be other requirements necessary to identify particular c
6、har-acteristics.These will be added to the specification as their inclusion becomes generally desirable and the necessary test data and methods become available.2.Applicable Documents 2.1 ASTM Standards:D 256 Test for Impact Resistance of Plastics D 6 18 Conditioning Plastics and Electrical D 638 Te
7、st for Tensile Properties of Plastics D 648 Test for Deflection Temperature of D 790 Test for Flexural Properties of Plastics2 D 1898 Recommended Practice for Sampling D 2146 Specification for Propylene Plastic D 2584 Test for Ignition Loss of Cured Rein-and Electrical Insulating Materials2 Insulati
8、ng Materials for Testing2 Plastics Under Flexural Load2 Plastics2 Molding and Extrusion Materials3 forced Resins3 D 3892 Practice for Packaging/Packing of Plastics2 3.Classification 3.1 Reinforced olefin polymers are classified in accordance with Table 1.For each material an identifying number is us
9、ed made up of four digits using the cell numbers for each charac-teristic in the order in which they appear in Table 1.NOTE 2-.4n example of this classification system is as follows:The designation 5667 would indicate the following characteristics:Tensile strength,min 532 kgf/cm2(7.6 X lo3 psi)Flexu
10、ral modulus,min 42 x IO3 kgf/cm2(600 X io3 psi)Impact strength,Izod,min 16.2 cm.kgf/cm(3.0 ft-lb/in.)Deflection temperature at 18.5 kgf/cm2(264 psi),min,143C(290F)Combining this with the composition option of 4.2,a 30%glass fiber reinforced propylene homo-polymer having the above properties would be
11、 spec-ified thus:30%Glass Fiber Reinforced Propylene Homopolymer Class 5667.A complete product des-ignation must include reinforcement content and type,polymer type,and classification number as in the foregoing example.3.2 Although the values listed are necessary to include the range of properties a
12、vailable in existing materials,they should not be inter-preted as implying that every possible combi-This specification is under the jurisdiction of ASTM Committee D-20 on Plastics and is the direct responsibility of Subcommittee D20.12 on Olefin Plastics.Current edition approved June 26,1981.Publis
13、hed De-cember 1981.Originally published as D2853-70.Last pre-vious edition D 2853-70(1978).Annual Book ofASTM Siandards,Part 35.Annual Book of ASTM Standards,Part 36.NOTICE:This standard has either been superseded and replaced by a new version or discontinued.Contact ASTM International(www.astm.org)
14、for the latest information.nation of the properties exists or can be ob-tained commercially.4.General Requirements 4.1 The plastic compositions shall be uni-form and shall conform to the requirements prescribed in this specification.The color and form of the material shall be as agreed upon between
15、the purchaser and the selier.5.Detail Requirements 5.1 The test specimens molded in accord-ance with Section 7 shall conform to the re-quirements listed in Table 1.5.2 Resins may be selected from the follow-ing types:propylene homopolymers,ethylene homopolymers,or copolymers of either.5.3 The concen
16、tration of the glass fibers shall be within a tolerance of+2%of the specified nominal value.The tolerance for other fillers and the test methods shall be agreed upon between the purchaser and the seller.Content is to be expressed as weight%of the total composition.6.Sampling 6.1 Unless otherwise agreed between the purchaser and the selier,the material shall be sampled in accordance with the procedure de-scribed in Sections 9 through 12 of Recom-mended Practice D 1898.Adequate statistical samplin
