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1、 ENGINEERING STANDARDS Material Specification Plastics GMP.E/P.152 Polyolefin Alloy - 2500 MPa Flexural Modulus Copyright 2006 General Motors Corporation All Rights Reserved December 2006 Originating Department: North American Engineering Standards Page 1 of 2 1 Scope 1.1 Material Description. This
2、specification covers the properties of a 2500 MPa nominal flexural modulus polyolefin alloy, high flow, pellet form, injection molding compound. For the purpose of this specification, polyolefin alloy is defined as an alloy of polypropylene plastic and EP or EPDM rubber. 1.2 Symbols. The material ab
3、breviation according to ISO 11469 is E/P. 1.3 Typical Applications. Typical applications include the following: painted grilles. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. ASTM D3763 ISO 1133 ASTM E228 ISO 1
4、183 ASTM E831 ISO 3451-1 ISO 178 ISO 11469 ISO 294 SAE J1545 ISO 527-1 SAE J1960 ISO 527-2 2.2 GM Standards/Specifications. GM9327P GMW3059 GMW3001 GMW3221 3 Requirements Important physical, mechanical and thermal properties that characterize the material are summarized in charts. The color shall be
5、 specified on drawings, in material specifications and otherwise. 3.1 Requirements on Test Specimens. Unless otherwise specified, test specimens shall be injection molded according to ISO 294. Test shall be conducted 40 h minimum after molding and immediately following a conditioning period of 24 ho
6、urs minimum at conditions per GMW3221, code A. All tests shall be performed on unannealed specimens. Test shall be conducted using the latest issue of the test methods indicated. Suitable precautions should be taken to ensure that applicable safe limits are not exceeded when conducting test procedur
7、es, processes, and/or handling the materials required by this specification. 3.2 Requirements on Parts. 3.2.1 Compound Properties. See Table 1. 3.3 Performance Requirements. Performance requirements, e.g., flammability, fogging or resistance to odor shall be specified on part drawings or in componen
8、t specifications. 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. 5.2 All materials supplied to this specification must comply with the re
9、quirements 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 20:20:54 MDTNo reproduction or networking permitted without license from I
10、HS -,-,- GMP.E/P.152 GM ENGINEERING STANDARDS Copyright 2006 General Motors Corporation All Rights Reserved Page 2 of 2 December 2006 Table 1: Compound Properties (Black or Natural) Properties Standard Unit Values Mineral Filler ISO 3451-1, Method A % by mass 30 to 37 Density ISO 1183, Method A g/cm
11、 1.12 to 1.19 Melt Flow Rate ISO 1133 g/10 minutes 11 to 18 Flexural Modulus ISO 178, 80 x 10 x 4 mm specimen, 2 mm/minute test speed, 64 mm support span MPa 2100 to 3050 Tensile Stress at Yield ISO 527-1, ISO 527-2, specimen A, 50 mm/minute test speed MPa 17 minimum Multiaxial Impact Strength at -1
12、0 2C ASTM D3763, specimen C, 2.2 m/s impact velocity J at max load 15 minimum All failures must be ductile Multiaxial Impact Strength at -10 2C ASTM D3763, specimen C, 2.2 m/s impact velocity J at max load 20 minimum All failures must be ductile Shrink, 48 h after molding ISO 294, plaque size 101.6
13、x 152 x 3.2 mm (4 x 6 x 0.125 in) % 0.35 to 0.65 Shrink, After Bake, 1 h at 121C ISO 294, plaque size 101.6 x 152 x 3.2 mm (4 x 6 x 0.125 in) % 0.50 to 0.75 Coefficient of Linear Thermal Expansion (Flow Direction) ASTM E831, ASTM E228 (x E-5/C) 2.10 to 5.80 Coefficient of Linear Thermal Expansion (C
14、ross Flow Direction) ASTM E831, ASTM E228 (x E-5/C) 3.60 to 6.20 6 Approved Sources Engineering qualifications of an approved 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 m
15、eeting the requirements of this specification. For other GM locations, the responsible engineering group should be contacted to obtain the approved source in that individual country. 7 Notes 7.1 Glossary. Not applicable. 7.2 Acronyms, Abbreviations, and Symbols. EP Ethylene Propylene EPDM Ethylene P
16、ropylene Diene Terpolymer MATSPC Materials Specification Database for GM VTS Vehicle Technical Specifications CTS Component Technical Specifications 8 Coding System This material specification shall be referenced in other documents, drawings, VTS, CTS, etc. as follows: Material per GMP.E/P.152 9 Rel
17、ease and Revisions 9.1 Release. This standard originated in December 2004. It was first approved by North America Materials Engineering in November 2006. It was first published in December 2006. 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 20:20:54 MDTNo reproduction or networking permitted without license from IHS -,-,-