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1、 ENGINEERING STANDARDS Material Specification Plastics GMP.E/P.122 Polyolefin Alloy - Weather Resistant, 1300 MPa Flexural Modulus, 20% Filled, High Flow Copyright 2006 General Motors Corporation All Rights Reserved December 2006 Originating Department: North American Engineering Standards Page 1 of
2、 3 1 Scope 1.1 Material Description. This specification covers the properties of a weather resistant, 1300 MPa nominal flexural modulus polyolefin alloy, 20% nominal mineral filler, high flow, pellet form, injection molding compound. For the purpose of this specification, polyolefin alloy is defined
3、 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 Paint on Parts Systems (GM APOPS) database. 1.2 Symbols. The material abbreviation according to ISO 11469 is E/P. 1.3 Typical Applica
4、tions. Typical applications include the following: body side moldings, claddings, rockers, wheel flares. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. ASTM D3763 ISO 1183 ISO 178 ISO 3451-1 ISO 294 ISO 11469 IS
5、O 527-1 SAE J1545 ISO 527-2 SAE J1960 ISO 1133 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 specified on drawings, in material specific
6、ations 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 h minimum at conditions per GMW3221, code A. A
7、ll 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 applicable safe limits are not exceeded when conducting test procedures, processes, and/or handling the materials re
8、quired by this specification. 3.2 Requirements on Parts. 3.2.1 Compound Properties. See Table 1. 3.2.2 Compound Properties. See Table 2. 4 Manufacturing Process Not Applicable. 5 Rules and Regulations 5.1 All materials supplied to this specification must comply with the requirements of GMW3001, Rule
9、s 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. Copyright General Motors North America Provided by IHS under license with GM Licensee=IHS Employees/1111111001
10、, User=Japan, IHS Not for Resale, 06/23/2008 23:22:07 MDTNo reproduction or networking permitted without license from IHS -,-,- GMP.E/P.122 GM ENGINEERING STANDARDS Copyright 2006 General Motors Corporation All Rights Reserved Page 2 of 3 December 2006 Table 1: Compound Properties (Black or Natural)
11、 Properties Standard Unit Values Mineral Filler ISO 3451-1, Method A % by mass 17 to 21 Density ISO 1183, Method A g/cm 1.00 to 1.05 Melt Flow Rate ISO 1133 g/10 min. 22 to 28 Flexural Modulus ISO 178, 80 x 10 x 4 mm specimen, 2 mm/minute test speed, 64 mm support span MPa 1150 to 1500 Tensile Stres
12、s at Yield ISO 527-1, ISO 527-2, specimen A, 50 mm/minute test speed MPa 16 minimum Multiaxial Impact Strength at 23 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 -30 2C ASTM D3763, specimen C, 2.2 m/s impact ve
13、locity J at max load 15 minimum All failures must be ductile Shrink, 48 h after molding ISO 294, plaque size 101.6 x 152 x 3.2 mm (4 x 6 x 0.125 in) % 0.47 to 0.62 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) % 0.73 to 0.89 Table 2: Compound Properties
14、 (Integrally Colored) Properties Standard Unit Values Multiaxial Impact Strength at 23 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 -30 2C ASTM D3763, specimen C, 2.2 m/s impact velocity J at max load 15 minimu
15、m All failures must be ductile Weather Resistance Note 2 Color Change Surface Defects Natural Weathering per GM9327P, 525 kilolangleys of AZ solar radiation, and 2 yrs of FL. Measure color as defined in Note 1 E 3.0 max. No objectionable defects allowed. Accelerated Weather Resistance Note 2 Color C
16、hange Surface Defects 2500 kJ/m2 exposure to exterior xenon arc apparatus per SAE J1960. Measure color as defined in Note 1 below. E 3.0 max. No objectionable defects allowed. Note 1: For integrally colored compounds, the color of each test specimen shall be measured per SAE J1545, CIELAB color spac
17、e, 10 observer, illuminant D65, specular included, sphere geometry, before and after exposures. In case of conflict between accelerated and natural weathering, natural weathering takes precedent. Prior to making measurements and observations on weathered specimens, wash the specimens with a solution
18、 consisting of 2g No 7 Car Wash Concentrate (distributed by Armor All Products, Aliso Viejo, CA 92656) and 1 L deionized water 22 3C. Use a soft sponge saturated with the solution and scrub the samples with a firm action. Note 2: In case of conflict between accelerated weathering and natural weather
19、ing, natural weathering results take precedence. 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 23:22:07 MDTNo reproduction or networking permitted without license from IHS -,-,- GM ENGINEERIN
20、G STANDARDS GMP.E/P.122 Copyright 2006 General Motors Corporation All Rights Reserved December 2006 Page 3 of 3 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
21、number have been qualified by engineering as meeting the requirements of this specification. 7 Notes 7.1 Glossary. Not applicable. 7.2 Acronyms, Abbreviations, and Symbols. APOPS Approved Paint on Part Systems CTS Component Technical Specifications EP Ethylene Propylene EPDM Ethylene Propylene Diene
22、 Terpolymer MATSPC Materials Specification Database for GM VTS Vehicle 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.122 9 Release and Revisions 9.1 Release. This standard origina
23、ted in May 2002. It was first approved by GM 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 23:22:07 MDTNo reproduction or networking permitted without license from IHS -,-,-