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1、 ENGINEERING STANDARDS Material Specification Plastics GMP.E/P.123 Polyolefin Alloy - Weather Resistant, 1500 MPa Flexural Modulus, Extrusion Grade Copyright 2006 General Motors Corporation All Rights Reserved December 2006 Originating Department: North American Engineering Standards Page 1 of 3 Sco
2、pe 1.1 Material Description. This specification covers the properties of a weather resistant, 1500 MPa nominal flexural modulus polyolefin alloy, extrusion grade compound. For the purpose of this specification, polyolefin alloy is defined as an alloy of polypropylene plastic and EP or EPDM rubber. 1
3、.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 Applications. Typical applications include the following: outer belt
4、 carrier, weather seals. 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 ISO 527-1 SAE J1545 ISO 527-2 SAE J1960 ISO 1133 2.2 GM Standards/Specifications.
5、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 specifications and otherwise. 3.1 Requirements on Test Specimens. Unless otherwise speci
6、fied, 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. All tests shall be performed on unannealed specimens. Tests shall be conducted us
7、ing 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 required by this specification. 3.2 Requirements on Parts. 3.2.1 Compound Properti
8、es. 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, Rules and Regulations for Material Specifications. 5.2 All materials supplied to thi
9、s 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, User=Japan, IHS Not for Resale, 06/23/2008 23:22:07 MDTNo reproduction or netw
10、orking permitted without license from IHS -,-,- GMP.E/P.123 GM ENGINEERING STANDARDS Copyright 2006 General Motors Corporation All Rights Reserved Page 2 of 3 December 2006 Table 1 Compound Properties (Black or Natural) Properties Standard Unit Values Mineral Filler ISO 3451-1, Method A % by mass 21
11、 to 26 Density ISO 1183, Method A g/cm 1.05 to 1.11 Melt Flow Rate ISO 1133 g/10 minutes 0.20 to 0.75 Flexural Modulus ISO 178, 80 x 10 x 4 mm specimen, 2 mm/min test speed, 64 mm support span MPa 1150 to 1800 Tensile Stress at Yield ISO 527-1, ISO 527-2, specimen A, 50 mm/minute test speed MPa 14 m
12、inimum Multiaxial Impact Strength at 23 2C ASTM D3763, specimen C, 2.2 m/s impact velocity J at max load 17 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 26 minimum All failures must be ductile Table 2: Compoun
13、d Properties (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 17 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.
14、load 26 minimum 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
15、Note 2 Color Change 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, CIE
16、LAB color space, 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 w
17、ith a solution consisting of 2 g 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
18、natural weathering, 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 -,-,
19、- GM ENGINEERING STANDARDS GMP.E/P.123 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
20、 specification 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
21、Propylene Diene 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.123 9 Release and Revisions 9.1 Release. This s
22、tandard originated in June 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 -,-,-