GMW GMW16828-2012 Polypropylene Glass Fiber Reinforced In-line Compounded Issue 1 English.pdf
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1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW16828 Polypropylene, Glass Fiber Reinforced, In-line Compounded Copyright 2012 General Motors Company All Rights Reserved December 2012 Originating Department: North American Engineering Standards Page 1 of 4 1 Scope 1.1 Material Description
2、. This standard covers the properties of polypropylene, homopolymer or copolymer, that are in-line compounded with long glass fiber reinforcement and injected into a mold or extruded directly into a compression molding process. 1.2 Symbols. The material abbreviation according to ISO 11469 is PP GFXX
3、 . The symbol shall be completed by the supplier according to the Glass Fiber (GF) content of the material. 1.3 Typical Applications. Typical applications include underbody panels, chassis shields and splash shields. 1.4 Remarks. Classifications are grouped according to the different ranges of glass
4、 fiber content. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. ISO 75 ISO 1183 ISO 6603-2 ISO 527-1 ISO 3451-1 ISO 11469 ISO 527-2 ISO 6603-1 SAE J1686 2.2 GM Standards/Specifications. GMW3013 GMW14444 GMW15725
5、GMW3059 GMW14650 GMW3221 GMW14651 2.3 Additional References. TMC003 Material Safety Data Sheet guidance documents (available at ). 3 Requirements Materials approved to this specification shall meet the requirements of GMW3013, General Requirements for Handling of Technical Terms of Delivery for Plas
6、tics. 3.1 Requirements on Delivery. The physical, mechanical and thermal properties that characterize the material are summarized in Table 1. Note: The requirements in Table 1 shall be documented for self-certification of the product according to GMW3013. The color shall be specified on drawings, in
7、 material specifications, and otherwise. 3.1.1 Requirements on Test Specimens. Unless otherwise specified, all specimens for test shall be obtained from compression-molded plaques with a thickness of (2.5 0.5) mm. All tests shall be performed on specimens 40 h minimum after molding and immediately f
8、ollowing a conditioning period of 24 h minimum in a controlled atmosphere per GMW3221, Code A, unless otherwise specified. All tests shall be performed on unannealed specimens. Five (5) coupons minimum shall be tested. The average value is the material property value. 3.1.2 Chemical Requirements. Al
9、l parts manufactured from molding compounds shall be resistant to the media they contact at their place of use. 3.2 Requirements on Materials. See Table 1. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted
10、without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16828 Copyright 2012 General Motors Company All Rights Reserved December 2012 Page 2 of 4 3.3 Performance Requirements. All finished parts for Interior applications shall meet the requirements according to GMW14444 and GMW14651. All
11、finished parts for Exterior applications shall meet the requirements according to GMW14650. All finished parts for Engine Compartment applications shall meet the requirements according to GMW15725. 3.4 Compound Properties. The following are also required for full specification approval, with a minim
12、um of one lot per required test: Poissons Ratio, Stress Strain Curve at +23 C, +85 C, -30 C; DSC Curve; and Infrared Spectroscopy Curve. Table 1: Compound Properties Glass Fiber Content (%) Property Standard Unit 20 30 40 Ash ISO 3451-1, Method A % by Mass 20 3 30 3 40 3 Density ISO 1183, Method A g
13、/cm3 1.04 0.04 1.12 0.04 1.23 0.04 Tensile Strength at Break Note 1 ISO 527-1, ISO 527-2, Specimen A, Test Speed 5 mm/minute MPa 35 45 55 Tensile Modulus Note 1 ISO 527-1/2 MPa 2700 3000 4000 Multiaxial Impact at +23 C, 6.6 m/s ISO 6603-1/2 Total Energy, Sample Size 60 mm x 60 mm J 7 10 15 Multiaxia
14、l Impact at -30 C, 6.6 m/s ISO 6603-1/2 Total Energy, Sample Size 60 mm x 60 mm J 6 8 12 Tensile Strength after Heat Aging 1000 h at 140 C ISO 527-1, ISO 527-2, Specimen A, Test Speed 5 mm/minute % Retention 75 75 75 Deflection Temperature Under Load, 1800 kPa, Method A ISO 75 (refer to SAE J1686),
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