GMNA-GMP.PP.129-2005.pdf
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1、 ENGINEERING STANDARDS Material Specification Plastics GMP.PP.129 Polypropylene (PP) 30% Long Glass Fiber Reinforced, Heat Stabilized Copolymer, ISO Tests Copyright 2005 General Motors Corporation All Rights Reserved August 2005 Originating Department: North American Engineering Standards Page 1 of
2、2 1 Scope This specification covers the properties of a 30% long glass fiber reinforced heat stabilized, injection molding grade polypropylene copolymer. 1.1 Symbol. The material abbreviation according to ISO 11469 is PP-GF30. 1.2 Typical Applications. Typical applications include the following: IP
3、retainer. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. ASTM D3012 ISO 527-1/2 ISO 75 ISO 1183 ISO 178 ISO 1873-2 ISO 180/A ISO 3451-1 ISO 294 ISO 11469 2.2 GM Standards/Specifications. GMW3001 GMW3221 GMW3059
4、3 Requirements 3.1 Requirements on Delivery. Important physical, mechanical and thermal properties that characterize the material are summarized in charts. The color shall be specified on drawings, in material specifications and otherwise. Unless otherwise specified, injection molding of test specim
5、ens shall be accomplished per ISO 294 with the conditions for injection molding from ISO 1873-2. All test specimens shall be brought to equilibrium in standard conditions for temperature and moisture and tested in that state as defined in GMW3221 Code A, unless the test method indicates that standar
6、d conditioning is not required. Condition specimens for a minimum of 24 h prior to testing or until moisture equilibrium is reached. If specimens are tested outside the conditioned environment, they shall be tested within 10 minutes of removal. The minimum values specified in the property tables mus
7、t 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 minimum value. 3.1.1 Comp
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