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1、 ENGINEERING STANDARDS Material Specification Plastics GMP.E/P.121 Polyolefin Alloy 1300 MPa Flexural Modulus, 20% Mineral Filled, High Flow 1 Scope 1.1 Material Description. This specification covers the properties of a high melt flow rate, 20% nominal mineral filled, 1300 MPa nominal flexural modu
2、lus polyolefin alloy, 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. 1.1.1 Paintability. Approved paint systems that can be used on this material are listed in the GM Approved Pai
3、nt on Parts Systems (GM APOPS) database. 1.2 Symbol. The material abbreviation according to ISO 11469 is E/P. 1.3 Typical Application. Typical applications include the following: body side moldings, claddings, rockers, and wheel flares 2 References Note: Only the latest approved standards are applic
4、able unless otherwise specified. 2.1External Standards/Specifications. ASTM E228 ISO 1133 ASTM D3763 ISO 1183 ISO 178 ISO 3451/1 ISO 294 ISO 11469 ISO 527 2.2 GM Standards/Specifications. GMW3001 GMW3221 GMW3059 3 Requirements Important physical, mechanical and thermal properties that characterize t
5、he material are summarized in charts. The color shall be 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 hours minimum after mold
6、ing and immediately following a conditioning period of 24 hours minimum at conditions per GMW3221, Code A. All tests shall be performed on unannealed specimens. Tests shall be conducted using the latest issue of the test methods indicated. Suitable precautions should be taken to ensure that applicab
7、le safe limits are not exceeded when conducting test procedures, processes, and/or handling the materials required by this specification. Requirements on Parts Copyright 2003 General Motors Corporation All Rights Reserved December 2003 Originating Department: North American Engineering Standards Pag
8、e 1 of 2 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 21:07:47 MDTNo reproduction or networking permitted without license from IHS -,-,- GMP.E/P.121 GM ENGINEERING STANDARDS 3.2 Compound Pro
9、perties. See table 1. Table 1: Compound Properties (Natural) Properties Standard Unit Values Mineral Filler ISO 3451-1, Method A % by mass 17 - 21 Density ISO 1183, Method A g/cm 1.00 1.05 Melt Flow Rate ISO 1133 g/10 min. 22 minimum Flexural Modulus ISO 178, 80 x 10 x 4 mm specimen, 2 mm/min test s
10、peed, 64 mm support span MPa 1150 - 1500 Tensile Stress at Yield ISO 527-1/2, specimen A, 50 mm/min test speed MPa 17 minimum Multiaxial Impact Strength at 23 2C ASTM D3763, specimen C, 2.2 m/s impact velocity J at max load 15 minimum Multiaxial Impact Strength at -30 2C ASTM D3763, specimen C, 2.2
11、m/s impact velocity J at max load 15 minimum CLTE ASTM E228 /C 4.4 5.0 x E-5 3.3 Compound Properties. See table 2. Table 2: Compound Properties (Integrally Colored) Properties Standard Unit Value Multiaxial Impact Strength at 23 2C ASTM D3763, specimen C, 2.2 m/s impact velocity J at max load 15 min
12、imum Multiaxial Impact Strength at -30 2C ASTM D3763, specimen C, 2.2 m/s impact velocity J at max load 15 minimum 3.4 Performance Requirements. Performance Requirements e.g., flammability, fogging or resistance to odor shall be specified on part drawings or in component specifications. 4 Manufactur
13、ing 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 requirements of GMW3059, Restric
14、ted and Reportable Substances for Parts. 6 Approved Sources Engineering qualification 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 meeting the requirements o
15、f this specification. 7 Coding System This material specification shall be referenced in other documents, drawings, VTS, CTS, etc. as follows: GMP.E/P.121 8 Release and Revisions 8.1 Release. This material specification originated in May 2002 and was approved by GM Materials Engineering in December
16、2003. It was first published in December 2003. Copyright 2003 General Motors Corporation All Rights Reserved Page 2 of 2 December 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 21:07:47 MDTNo reproduction or networking permitted without license from IHS -,-,-