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1、 ENGINEERING STANDARDS Material Specification Plastics GMP.E/P.117 Thermoplastic Elastomer - Polyolefin Alloy, Shore A70, Interior, Integrally Colored 1 Scope This specification covers the properties of a natural, UV stabilized, thermoplastic elastomer consisting of polypropylene and ethylene/other
2、copolymers and alloys for interior applications. This material can be processed by injection molding. 1.1 Typical Application. Typical applications include the following: console cover, assist han- dle, armrest, and shifter knob. Continuous oper- ating temperature range: -40C to 100C. 2 References N
3、ote: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. AATCC 23 ISO 1183 ISO 34-1 ISO 3167 ISO 105-G02 SAE J1545 ISO 527 SAE J1885 ISO 812 SAE J2236 ISO 868 2.2 GM Standards/Specifications. GM1002M GMW3001 GM9305P GMW3059 GM9538P GMW
4、3221 3 Requirements 3.1 Requirements on Delivery. 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. 3.2 Requirements on Test Specimens. Tests shall be cond
5、ucted 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 ma- terials required by this specification. Unless otherwise specified, preparation
6、of test specimens shall be in accordance with ISO 3167. Tests shall be conducted 40 h minimum after molding and immediately following a condition- ing period of 24 h minimum per GMW3221, Code A unless otherwise specified. All tests shall be performed on unannealed specimens. In addition, tests speci
7、fied at temperatures be- low or above 22 3C shall be conducted at the specified temperature using specimens condi- tioned at the specified temperature for 4 h mini- mum. The minimum values specified in the property tables must be met by test specimens in natural, black, or in a standard sampled colo
8、r if natural or black are not available. For colored grades where other pigment and additive systems (e.g. stabilizer) are used, the impact values shall not decrease more than 10% from the specified minimum value. 3.3 Compound Properties. See Tables 1 and 2. Copyright 2005 General Motors Corporation
9、 All Rights Reserved April 2005 Originating Department: North American Engineering Standards Page 1 of 3 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 23:21:42 MDTNo reproduction or networkin
10、g permitted without license from IHS -,-,- GMP.E/P.117 GM ENGINEERING STANDARDS Table 1: Compound Properties (Natural) Property Test Method Unit Value Shore A Hardness ISO 868, 15 second delay. Shore A65 to 75 Specific Gravity ISO 1183 0.85 to 0.91 Tensile Stress at Break ISO 527, Type 1A dumbbell,
11、500 mm/minute MPa 3.3 min Elongation at Break ISO 527, Type 1A dumbbell, 500 mm/minute % 285 min Tensile Stress at 100% Elongation ISO 527, Type 1A dumbbell, 500 mm/minute MPa 1.4 min Tear Strength ISO 34-1, Method B, angle die, 500 mm/minutekN/m 22 min Low Temperature Brittleness ISO 812, Type B C
12、-70 max Properties After Heat Aging SAE J2236, 1008 h at 100C in an air- circulating oven followed by indicated property testing at 23 C. Test methods are the same as for original mechanical property testing. Change in Prop- erty No objectionable color change or tackiness Tensile Strength Elongation
13、 at Break % % 90 retention min 80 retention min Fogging Number GM9305P, Type B, 95C % 80 min Colorfastness to Light Xenon Arc per SAE J1885, 1240.8 kJ/m2 Change in Color Surface Defects E 3.0 No objectionable de- fects allowed Table 2: Compound Properties (Integrally Colored) Note 1 Property Test Me
14、thod Unit Value Fogging Number GM9305P, Type B, 95C % 80 min Colorfastness to Burnt Gas (propane) AATCC 23 or ISO 105-G02, 168 h at 60C Light gray or beige specimen E = 1.5 max YI = 2.0 max Colorfastness to Light Xenon Arc per SAE J1885, 1240.8 kJ/m2 Change in Color Surface Defects E 3.0 No objectio
15、nable de- fects allowed Natural Weathering 105,000 TNR Langleys at 102C exposure to natural weathering per GM9538P. Change in Color Surface Defects E 3.0 No objectionable de- fects allowed Note 1: For integrally colored compounds, the color of each test specimen shall be measured per SAE J1545, CIEL
16、AB color space, 10 degree observer, illuminant D65, specular included, sphere geometry, before and after exposure. In case of conflict between ac- celerated weathering and natural weathering, natural weathering takes precedence. Copyright 2005 General Motors Corporation All Rights Reserved Page 2 of
17、 3 April 2005 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 23:21:42 MDTNo reproduction or networking permitted without license from IHS -,-,- GM ENGINEERING STANDARDS GMP.E/P.117 4 Manufactu
18、ring 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 Mate- rial Specifications and GM1002M, Standard Requirements - Plastics. 5.2 All materials supplied to this specification must
19、 comply with the requirements of GMW3059, Restricted and Reportable Sub- stances for Parts. Copyright 2005 General Motors Corporation All Rights Reserved 6 Approved Sources Engineering qualifications of an approved source is required for this specification. Only sources listed in the GM Materials Fi
20、le (i.e., MATSPC) under this specification number have been qualified by engineering as meeting the requirements of this specification. 7 Coding System This material specification shall be referenced in other documents, drawings, VTS, CTS, etc. as follows: Material per GMP.E/P.117 8 Release and Revi
21、sions 8.1 Release. This material specification origi- nated in March 2002 by the TPE Material Spe- cialist. It was first published in June 2003. 8.2 Revisions Rev Approval Date Description (Organization) A APR 2005 Editorial; added GMW3221, GM1002M. Added Natural Weathering (TPE Material Specialist) April 2005 Page 3 of 3 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 23:21:42 MDTNo reproduction or networking permitted without license from IHS -,-,-