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1、 ENGINEERING STANDARDS Material Specification Plastics GMP.TES.025 Thermoplastic Elastomer - Styrenic Block Copolymer, Shore A80, Interior/Exterior, Integrally Colored 1 Scope This specification covers the properties of an 80 Shore A, black and natural, heat and UV stabi- lized thermoplastic elastom
2、er consisting of poly- propylene and SEBS (sty- rene/ethylene/butadiene/styrene) rubber for interior and exterior applications. 1.1 Typical Application. Typical applications include the following: cup holders and bin mats. 2 References Note: Only the latest approved standards are applicable unless o
3、therwise specified. 2.1 External Standards/Specifications. ISO 34-1 ISO 527 ISO 812 ISO 815 ISO 868 ISO 1183 ISO 1431-1 SAE J1545 SAE J1885 SAE J1960 SAE J1976 SAE J2236 2.2 GM Standards/Specifications. GM9305P GMW3001 GMW3059 3 Requirements 3.1 Requirements on Delivery. Important physical, mechanic
4、al and thermal properties that characterize the material are summarized in charts. The color shall be specified on drawings, in material specifications and otherwise. 3.1.1 Requirements On Test Specimens. Tests shall be conducted using the latest issue of the test methods indicated. Suitable precau-
5、 tions 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. Test specimens shall be die cut from fan gated injection molded plaques having a nominal thick- ness of 2.0 0.2 mm.
6、Die cut specimens are to be tested with the long axis of the test specimen perpendicular to the direction of flow. Plaque dimensions must be sufficient to permit this. Tests shall be conducted 40 h minimum after molding and immediately following a condition- ing period of 24 h minimum at 22 3C and 5
7、0 6% RH unless otherwise specified. All tests shall be performed on unannealed specimens. In addition, tests specified 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 valu
8、es specified in the property tables must be met by test specimens in natural, black or in a “standard” sampled color 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
9、the specified minimum value. Copyright 2003 General Motors Corporation All Rights Reserved October 2003 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,
10、 IHS Not for Resale, 06/23/2008 23:31:19 MDTNo reproduction or networking permitted without license from IHS -,-,- GMP.TES.025 GM ENGINEERING STANDARDS Copyright 2003 General Motors Corporation All Rights Reserved Page 2 of 3 October 2003 3.3 Compound Properties. See Tables 1 and 2. Table 1: Compoun
11、d Properties (Black) Property Test Method Unit Value Shore A Hardness ISO 868, 15 s delay Shore A 77 to 87 Specific Gravity ISO 1183 1.07 to 1.13 Tensile Stress at Break ISO 527, Type 1BA dumbbell, 500 mm/minute (TPE with hardness 90 Shore A) MPa 5.9 min Elongation at Break ISO 527, Type 1BA dumbbel
12、l, 500 mm/minute (TPE with hardness 90 Shore A) % 300 min Tensile Stress at 100% Elongation ISO 527, Type 1BA dumbbell, 500 mm/minute (TPE with hardness 90 Shore A) MPa 3.0 min Compression Set - 22 hours at 70C ISO 815, Type A % 45 max Tear Strength ISO 34-1, Method B, angle die, 500 mm/minute kN/m
13、40 min Low Temperature Brittle- ness ISO 812, Type B C -50 max Properties After Heat Aging Tensile Strength Elongation at Break SAE J2236, 1008 hours at 80C in an air- circulating oven followed by indicated prop- erty testing at 23C. Test methods are the same as for original mechanical property test
14、ing. Change in prop- erty % % No objectionable color change or tackiness. 80 retention min. 80 retention min. Fogging Number GM9305P, Type A, 85C % 70 minimum Ozone Resistance ISO 1431-1, Procedure A, 100 pphm, 40C Zero Rating Colorfastness to Light Change in Color Surface Defects Xenon Arc per SAE
15、J1885, 1240.8 kJ/m2 E 3.0 No objectionable defects allowed Accelerated Weathering Change in Color Surface Defects Xenon Arc per SAE J1960, 2500 kJ/m2 E 3.0 No objectionable defects allowed Solar Weathering Color Change Surface defects 2 years exposure to Natural weathering in Arizona and Florida per
16、 SAE J1976, Proce- dure A E 3.0 No objectionable defects allowed 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 23:31:19 MDTNo reproduction or networking permitted without license from IHS -,-
17、,- GM ENGINEERING STANDARDS GMP.TES.025 Copyright 2003 General Motors Corporation All Rights Reserved October 2003 Page 3 of 3 Table 2: Compound Properties (Integrally Colored) Property Test Method Unit Value Fogging Number GM9305P, Type A, 85C % 70 min Colorfastness to Light Change in Color Surface
18、 Defects Xenon Arc per SAE J1885, 1240.8 kJ/m2 E 3.0 No objectionable defects allowed Accelerated Weather- ing Change in Color Surface Defects Xenon Arc per SAE J1960, 2500 kJ/m2 E 3.0 No objectionable defects allowed Solar Weathering Color Change Surface defects 2 years exposure to Natural weatheri
19、ng in Ari- zona and Florida per SAE J1976, Procedure A E 3.0 No objectionable defects allowed For integrally colored compounds, the color of each test specimen shall be measured per SAE J1545, CIELAB color space, 10 degree observer, illuminant D65, specular included, sphere geometry, before and afte
20、r exposure. In case of conflict between accelerated weathering and natural weathering, natural weathering takes precedence. 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 Regulat
21、ions for Mate- rial Specifications. 5.2 All materials supplied to this specification must comply with the requirements of GMW3059, Restricted and Reportable Sub- stances for Parts. 6 Approved Sources Engineering qualification of an approved source is required for this specification. Only sources lis
22、ted in the GM Material File (i.e. MATSPC) under this specification number have been quali- fied by engineering as meeting the requirements of this specification. 6 Coding System This material specification shall be referenced in other documents, drawings, VTS, CTS, etc. as follows: GMP.TES.025 7 Rel
23、ease and Revisions 7.1 Release. This specification was first ap- proved and published in October 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 23:31:19 MDTNo reproduction or networking permitted without license from IHS -,-,-