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1、 ENGINEERING STANDARDS Material Specification Plastics GMP.TES.013 Thermoplastic Elastomer Styrene Block Copolymer, Shore A60, Interior/Exterior 1 Scope This specification covers the properties of a UV stabilized thermoplastic elastomer consisting of polypropylene and SEBS (styrene/ethylene/buty- le
2、ne/styrene) rubber for interior and exterior applications. 1.1 Typical Application. Typical applications include the following: cowl vent screen lip, fuel filler pocket, and glass run channel. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1Externa
3、l Standards/Specifications. ISO 34-1 ISO 1431-1 ISO 37 SAE J1885 ISO 812 SAE J1960 ISO 815 SAE J1976 ISO 868 SAE J2236 ISO 1183 2.2 GM Standards/Specifications. GM9305P GMW3001 GM9900P GMW3059 3 Requirements 3.1 Requirements on Delivery. Important physical, mechanical and thermal properties that cha
4、racterize the material are summarized in charts. The color shall be specified on drawings, in material specifications and otherwise. Requirements on Test Specimens Tests shall be conducted using the latest issue of the test methods indicated. Suitable precau- tions should be taken to ensure that app
5、licable 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. Die cut specimens are to be tested with t
6、he 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 50 6% RH unless otherwise specified. All t
7、ests 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 values specified in the property tables must
8、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 the specified minimum value. Copyright 200
9、3 General Motors Corporation All Rights Reserved December 2003 Originating Department: North American Engineering Standards Page 1 of 4 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 23:54:18
10、MDTNo reproduction or networking permitted without license from IHS -,-,- GMP.TES.013 GM ENGINEERING STANDARDS Copyright 2003 General Motors Corporation All Rights Reserved Page 2 of 4 December 2003 3.1.1 Mechanical Requirements. See table 1. Table 1: Mechanical Requirements Mechanical Proper- ties
11、Test Methods Unit Value Shore A Hardness ISO 868, 15 s delay Shore A 60 8 Tensile Stress at Break ISO 37, Type 1 dumbbell, 500 mm/minute MPa 2.7 min Elongation at Break ISO 37, Type 1 dumbbell, 500 mm/minute % 200 min Tensile Stress at 100 % Elongation ISO 37, Type 1 dumbbell, 500 mm/minute MPa 1.0
12、min Compression Set ISO 815, Type A, 22 h at 70 C % 87 max Tear Strength ISO 34-1, Method B, angle die, 500 mm/minute kN/m 18 min Low Temperature Brit- tleness ISO 812, Type B C -50 max Properties After Heat Aging SAE J2236, 1000 h at 135 C in an air- circulating oven followed by indicated property
13、testing at 23 C. Test methods are the same as for original mechanical property testing. Change in property No objectionable color change or tackiness. Tensile Strength % 50 retention min Elongation at Break % 50 retention min 3.1.2 Physical Requirements. See table 2. Table 2: Physical Requirements P
14、hysical Properties Test Methods Unit Value Specific Gravity ISO 1183 1.15 to 1.26 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 23:54:18 MDTNo reproduction or networking permitted without lic
15、ense from IHS -,-,- GM ENGINEERING STANDARDS GMP.TES.013 Copyright 2003 General Motors Corporation All Rights Reserved December 2003 Page 3 of 4 3.1.3 Additional Requirements. See table 3. Table 3: Additional Performance Properties Additional Performance Properties Test Methods Unit Value Fogging Nu
16、mber GM9305P, Type B, 85 C % 70 min Colorfastness to Light Xenon Arc per SAE J1885, 1240.8 kJ/m2 Change in Color E 3.0 Surface Defects No objectionable defects allowed Cleaning/Solvent Resistance GM9900P, Liquid to sit for 15 min- utes, Procedure A and B. No loss of gloss, no stain, surface softenin
17、g or loss of grain. No color transfer to cloth. Ozone Resistance ISO 1431-1, Procedure A, 100 pphm, 40 C Zero Rating Accelerated Weather- ing Xenon Arc per SAE J1960, 2500 kJ/m2 Change in Color E 3.0 Surface Defects No objectionable defects allowed Solar Weathering 2 years exposure to natural weathe
18、ring in Arizona and Florida per SAE J1976, Procedure A Change in Color E 3.0 Surface Defects No objectionable defects allowed 3.2 Performance Requirements. Performance Requirements e.g., flammability, fogging or re- sistance to odor shall be specified on part draw- ings or in component specification
19、s. 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 Mate- rial Specifications. 5.2 All materials supplied to this specification must comply with the requirements of
20、 GMW3059, Restricted and Reportable Sub- stances 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 quali- fied by engineering as meeti
21、ng the requirements of this specification. 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 23:54:18 MDTNo reproduction or networking permitted without license from IHS -,-,- GMP.TES.013 GM ENGI
22、NEERING STANDARDS Copyright 2003 General Motors Corporation All Rights Reserved Page 4 of 4 December 2003 7 Coding System This material specification shall be referenced in other documents, drawings, VTS, CTS, etc. as follows: GMP.TES.013 8 Release and Revisions 8.1 Release. This material specificat
23、ion was first approved in November from a 1998 preprint and was published in April 2001. 8.2 Revisions. Rev Approval Date Description (Organization) A FEB 2002 ISO Conversion, Interior requirements added (Plas- tics TDG) B SEP 2003 Revise Table 1 Data (TPE Specialist) 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 23:54:18 MDTNo reproduction or networking permitted without license from IHS -,-,-
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