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1、 ENGINEERING STANDARDS Material Specification Plastics GMP.E/P.132 Thermoplastic Elastomer Polyolefinic, Shore A75, Interior/Exterior 1 Scope This specification covers the properties of a black, heat stabilized, thermoplastic vulcanizate containing partially cured EPDM elastomer particles dispersed
2、in a continuous polypropylene matrix. The material can be processed by extrusion and injection molding. 1.1 Typical Application. Typical applications include the following: non-sealing sections (carrier) of glass run channels. 2 References Note: Only the latest approved standards are applicable unle
3、ss otherwise specified. 2.1 External Standards/Specifications. ISO 34-1 ISO 1431-1 ISO 37 SAE J1885 ISO 812 SAE J1960 ISO 815 SAE J1976 ISO 868 SAE J2236 ISO 1183 2.2 GM Standards/Specifications. GM9305P GMW3059 GMW3001 3 Requirements 3.1 Requirements on Delivery. Important physical, mechanical and
4、thermal properties that characterize the material 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 shou
5、ld be taken to ensure that applicable safe limits are not exceeded when conducting test procedures, processes, and/or handling the materials required by this specification. Test specimens shall be die cut from fan gated injection molded plaques having a nominal thickness of 2.0 0.2 mm. Die cut speci
6、mens are to be tested with the long axis of the test specimen perpendicular to the direction of flow. Plaque dimensions must be sufficient to permit this. Tests shall be conducted 40 h minimum after molding and immediately following a conditioning period of 24 h minimum at 22 3C and 50 6% RH unless
7、otherwise specified. All tests shall be performed 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 hours minimum. The minimum values specified in t
8、he property tables must be met by test specimens in 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 mini
9、mum value. 3.3 Compound Properties. See Table 1. Copyright 2003 General Motors Corporation All Rights Reserved June 2003 Originating Department: North American Engineering Standards Page 1 of 3 Copyright General Motors North America Provided by IHS under license with GM Licensee=IHS Employees/111111
10、1001, User=Japan, IHS Not for Resale, 06/23/2008 23:22:14 MDTNo reproduction or networking permitted without license from IHS -,-,- GMP.E/P.132 GM ENGINEERING STANDARDS Copyright 2003 General Motors Corporation All Rights Reserved Page 2 of 3 June 2003 Table 1: Compound Properties (Black) Property T
11、est Method Unit Value Shore A Hardness ISO 868, 15 second delay Shore A76 4 Specific Gravity ISO 1183 0.96 - 1.02 Tensile Stress at break ISO 37, Type 1 dumbbell, 500 mm/minute MPa 4.5 min Elongation at break ISO 37, Type 1 dumbbell, 500 mm/minute % 490 min Tensile Stress at 100% Elongation ISO 37,
12、Type 1 dumbbell, 500 mm/minute MPa 2.8 min Compression Set ISO 815, Type A, 22 h at 70C % 55 max Tear Strength ISO 34-1, Method B, angle die, 500 mm/minute kN/m 30 min Low Temperature Brittleness ISO 812, Type B C -54 max Properties After Heat Aging SAE J2236, 1000 h at 135 C in an air- circulating
13、oven followed by indicated property testing at 23 C. Test methods are the same as for original mechanical property testing. Change in Property No objectionable color change or tackiness. Tensile Strength Elongation at Break % % 80 retention min 75 retention min Ozone Resistance ISO 1431-1, Procedure
14、 A, 100 pphm, 40C Zero Rating Fogging Number GM9305P, Type B, 95 C % 70 min Colorfastness to Light Xenon Arc per SAE J1885, 1240.8 kJ/m2 Change in Color Surface Defects E 3.0 No objectionable defects allowed Accelerated Weathering Xenon Arc per SAE J1960, 2500 kJ/m2 Change in Color Surface Defects E
15、 3.0 No objectionable defects allowed Solar Weathering 2 years exposure to Natural weathering in Arizona and Florida per SAE J1976, Procedure A Color Change Surface Defects E 3.0 No objectionable defects allowed Copyright General Motors North America Provided by IHS under license with GM Licensee=IH
16、S Employees/1111111001, User=Japan, IHS Not for Resale, 06/23/2008 23:22:14 MDTNo reproduction or networking permitted without license from IHS -,-,- GM ENGINEERING STANDARDS GMP.E/P.132 4 Manufacturing Process Not applicable. 5 Rules and Regulations 5.1 All materials supplied to this specification
17、must comply with the requirements of GMW3001, Rules and Regulations for Material Specifications. 5.2 All materials supplied to this specification must comply with the requirements of GMW3059, Restricted and Reportable Substances for Parts. 6 Approved Sources Engineering qualification of an approved
18、source is required for this specification. Only sources listed in the GM Materials File (i.e., MATSPC) under this specification number have been qualified by engineering as meeting the requirements of this specification. 7 Coding System This material specification shall be referenced in other docume
19、nts, drawings, VTS, CTS, etc. as follows: GMP.E/P.132 8 Release and Revisions 8.1 Release. This material specification was originated by the 90A TPE Material Specialist in October 2002 and published in June 2003. Copyright 2003 General Motors Corporation All Rights Reserved Page 3 of 3 June 2003 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 23:22:14 MDTNo reproduction or networking permitted without license from IHS -,-,-