GMNA-GMP.E-P.151-2005.pdf
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1、 ENGINEERING STANDARDS Material Specification Plastics GMP.E/P.151 Thermoplastic Elastomer - Polyolefinic, Shore A87, Interior, Exterior, Integrally Colored Copyright 2005 General Motors Corporation All Rights Reserved August 2005 Originating Department: North American Engineering Standards Page 1 o
2、f 3 1 Scope This specification covers the properties of black and natural, UV and heat stabilized thermoplastic vulcanizate containing fully cured EPDM elastomer particles dispersed in a continuous polypropylene matrix. This material can be processed by injection molding or extrusion. 1.1 Typical Ap
3、plication. Typical applications include the following: wheel flare seals. Continuous operating temperature range: -40 to 135C. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. AATCC 23 ISO 1183 ISO 34-1 ISO 1431-1
4、 ISO 37 SAE J1545 ISO 105-G02 SAE J1885 ISO 812 SAE J1960 ISO 815 SAE J1976 ISO 868 SAE J2236 2.2 GM Standards/Specifications. GM1002M GMW3001 GM9305P GMW3059 GM9538P GMW3221 3 Requirements 3.1 Requirements on Delivery. Important physical, mechanical and thermal properties that characterize the mate
5、rial are summarized in charts. The color shall be specified on drawings, in material specifications and otherwise. 3.2 Requirements On Test Specimens. Tests shall be conducted using the latest issue of the test methods indicated. Suitable precautions should be taken to ensure that applicable safe li
6、mits are not exceeded when conducting test procedures, processes, and/or handling the materials required by this specification. Tests specimens shall be die cut from fan gated injection molded plaques having a nominal thickness of 2.0 0.2 mm. Die cut specimens are to be tested with the long axis of
7、the test specimen perpendicular to the direction of flow. Plaque dimensions must me sufficient to permit this. Tests shall be conducted 40 h minimum after molding and immediately following a conditioning period of 24 h minimum per GMW3221 Code A unless otherwise specified. All tests shall be perform
8、ed on unannealed specimens. In addition, tests specified at temperatures below or above 22 3C shall be conducted at the specified temperature using specimens conditioned at the specified temperature for 4 h minimum. The minimum values specified in the property tables must be met by test specimens in
9、 natural, black, or in a standard sampled color if natural or black are not available. For colored grades where other pigment and additive systems (e.g. stabilizer) are used, the impact values shall not decrease more than 10% from the specified minimum value. 3.3 Compound Properties. See Table 1 and
10、 Table 2. 4 Manufacturing Process Not applicable. 5 Rules and Regulations 5.1 All materials supplied to this specification must comply with the requirements of GMW3001, Rules and Regulations for Material Specifications and GM1002M, Standard Requirements - Plastics. 5.2 All materials supplied to this
11、 specification must comply with the requirements of GMW3059, Restricted and Reportable Substances for Parts. Copyright General Motors North America Provided by IHS under license with GM Licensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 06/23/2008 23:23:24 MDTNo reproduction or netwo
12、rking permitted without license from IHS -,-,- GMP.E/P.151 GM ENGINEERING STANDARDS Copyright 2005 General Motors Corporation All Rights Reserved Page 2 of 3 August 2005 Table 1: Compound Properties (Black / Natural) Property Test Method Unit Value Shore A Hardness ISO 868, 15 second delay. Shore A8
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