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1、 ENGINEERING STANDARDS Material Specification Plastics GMP.E/P.120 Thermoplastic Elastomer Polyolefinic, Shore A80, Interior/Exterior, Integrally Colored 1 Scope This specification covers the properties of a UV and heat stabilized, thermoplastic vulcanizate containing fully cured EPDM elastomer part
2、icles dispersed in a continuous polypropylene matrix. The material can be processed by extrusion and injection molding. 1.1 Typical Application. Typical applications include the following: air dam deflectors, cup- holders, bin mats, grab handles, gaskets, close- outs. Continuous operating temperatur
3、e range: -40C to 135C. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. AATCC 23 ISO 1183 ISO 34-1 ISO 1431-1 ISO 37 SAE J1545 ISO 105-G02 SAE J1885 ISO 812 SAE J1960 ISO 815 SAE J1976 ISO 868 SAE J2236 2.2 GM Sta
4、ndards/Specifications. GM9305P GMW3059 GMW3001 GMW3221 3 Requirements 3.1 Requirements on Delivery. Important physi- cal, mechanical and thermal properties that char- acterize the material are summarized in charts. The color shall be specified on drawings, in mate- rial specifications and otherwise.
5、 3.2 Requirements on Test 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 ma- terials required by this
6、 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 the long axis of the test specimen perpendicular to the direction of flow. Plaque di- mensions must be sufficient to permit this
7、. Tests shall be conducted 40 h minimum after molding and immediately following a conditioning period of 24 h minimum per GMW3221 Code A unless otherwise specified. All tests shall be per- formed on unannealed specimens. In addition, tests specified at temperatures below or above 22 3C shall be cond
8、ucted at the specified tem- perature using specimens conditioned at the specified temperature for 4 h minimum. The minimum values 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
9、 where other pigment and additive systems (e.g. stabi- lizer) are used, the impact values shall not de- crease more than 10% from the specified mini- mum value. 3.3 Compound Properties. Copyright 2004 General Motors Corporation All Rights Reserved December 2004 Originating Department: North American
10、 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 23:21:49 MDTNo reproduction or networking permitted without license from IHS -,-,- GMP.E/P.120 GM ENGINEERING
11、STANDARDS 3.3.1 Compound Properties (Black/Natural). See Table 1. Table 1: Compound Properties (Black/Natural) Property Test Methods Unit Value Shore A Hardness ISO 868 15 s delay Shore A 80 4 Specific Gravity ISO 1183 0.89-0.99 Tensile Stress at Break ISO 37, Type 1 dumbbell, 500 mm/minute MPa 7.2
12、min Elongation at Break ISO 37, Type 1 dumbbell, 500 mm/minute % 400 min Tensile Stress at 100% Elongation ISO 37, Type 1 dumbbell, 500 mm/minute MPa 3.0 min Compression Set ISO 815, Type A, 22 h at 70C % 55 max Tear Strength ISO 34-1,Method B, angle die, 500 mm/minute kN/m 28 min Low Temperature Br
13、ittleness ISO 812,Type B C -50 max Properties After Heat Aging SAE J2236, 1000 h at 100C in an air- circulating oven followed by indicated property testing at 23C. Test methods are the same as for original mechanical property testing. Change in prop- erty No objectionable color change or tackiness T
14、ensile Strength % 80 retention min Elongation at Break % 90 retention min Fogging Number GM9305P, Type B, 95C % 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 Ozone Resistance ISO 1431-1, Procedure A, 100 pph
15、m, 40C Zero Rating Accelerated Weathering 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 weathering in Ari- zona and Florida per SAE J1976, Procedure A Change in Color E 3.0 Surface Defects No ob
16、jectionable defects allowed Copyright 2004 General Motors Corporation All Rights Reserved Page 2 of 3 December 2004 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 23:21:49 MDTNo reproduction o
17、r networking permitted without license from IHS -,-,- GM ENGINEERING STANDARDS GMP.E/P.120 3.3.2 Compound Properties (Integrally Colored). See Table 2. Table 2: Compound Properties (Integrally Colored Interior Applications) Property Test Methods Unit Value Fogging Number GM9305P, Type B, 95C % 70 mi
18、n Colorfastness to Burnt Gas 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 E 3.0 Surface Defects No objectionable de- fects allowed Note 1: For integrally colored compounds, the
19、 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 after exposures. In case of conflict between acceler- ated and natural weathering, natural weathering takes precedent. 4 Manufacturing
20、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 Specifica- tions. 5.2 All materials supplied to this specification must comply with the requirements of GMW3059, Restricte
21、d and Reportable Substances for Parts. 6 Approved Sources Engineering qualifications 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 meeting the requirements
22、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.120 8 Release and Revisions 8.1 Release. This material specification was originated by the TPE Material Specialist in April 2002 and pu
23、blished in December 2002. 8.2 Revisions Rev Approval Date Description (Organization) A OCT 2004 Addition of GMW3221 and Resistance to Burnt Gas (TPE Specialist) Copyright 2004 General Motors Corporation All Rights Reserved December 2004 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 23:21:49 MDTNo reproduction or networking permitted without license from IHS -,-,-