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1、 ENGINEERING STANDARDS Material Specification Plastics GMP.PVC.038 PVC Liquid Castable, Flexible Skin, UV Stabilized Copyright April 2003 General Motors Corporation All Rights Reserved April 2003 Originating Department: North American Engineering Standards, Records and Documentation Page 1 of 4 1 Sc
2、ope This specification covers the properties of an inte- grally colored, 70 Shore A durometer, polyvinyl- chloride homopolymer, liquid castable compound. 1.1 Material Description. Additional Characteris- tics that apply to this specification are: Properties Code Letters Ultraviolet Light Stabilized
3、U Approved paint systems that can be used on this material are listed in the GM Approval Paint on Parts Systems (GM APOPS) database. 1.2 Symbol. The material abbreviation according to ISO 11436 is: PVC. 1.3 Typical Application. Typical applications in- clude the following: Console sides, door panels
4、 and other vertical parts below the beltline. 2 References Note: Only the latest approved standards are ap- plicable unless otherwise specified. 2.1 External Standards/Specifications. ASTM D412 ASTM D638 ASTM D792 ASTM D1004 ASTM D2240 ISO 11469 SAE J1545 SAE J1885 2.2 GM Specifications. GM9305P GM9
5、503P GMW3001 GMW3059 3 Requirements 3.1 Requirements on Delivery. 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
6、, proc- esses, and/or handling the materials required by this specification. Tests shall be conducted 40 h minimum after molding and immediately following a conditioning period of 24 h minimum at 22 3C and 50 6% RH unless otherwise specified. All tests shall be performed on unannealed specimens. In
7、addition, tests specified at temperatures below or above 22 3C shall be conducted at the specified tem- perature using specimens conditioned at the speci- fied temperature for 4 h minimum. Test specimens shall be die cut from test plaques prepared by completely fusing liquid or powder PVC in an oven
8、 on a smooth, flat panel. Test specimens shall be 1.0 0.1 mm thick unless oth- erwise specified. Property values are the average of an equal number of specimens cut from both the longitudinal and transverse plaque directions. The minimum values specified in the property ta- bles must be met by test
9、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 20% from the specified minimum value. 3.1.1 Chemical Requirements.
10、 All parts manu- factured from molding compounds shall be resis- tant to the media they contact, such as aliphatic and aromatic hydrocarbons, fuels, lubricants, oils, greases and alcohols, at their places of use. Copyright General Motors North America Provided by IHS under license with GM Licensee=I
11、HS Employees/1111111001, User=Japan, IHS Not for Resale, 06/23/2008 23:54:17 MDTNo reproduction or networking permitted without license from IHS -,-,- GMP.PVC.038 GM ENGINEERING STANDARDS Copyright April 2003 General Motors Corporation All Rights Reserved Page 2 of 4 April 2003 3.1.2 Mechanical Requ
12、irements. Table 1: Mechanical Requirements Properties Test Methods Unit Value Shore A hardness ASTM D2240 Use 1 kg mass. Specimen thickness, 6.4 2 mm. 15 s delay Shore A 65 to 75 Stress at break ASTM D412 Method A, Die C, 500 mm/minute or ASTM D638, Type IV 500 mm/minute MPa 9.8 min Strain at break
13、ASTM D412 Method A, Die C, 500 mm/minute or ASTM D638, Type IV 500 mm/minute MPa 250 min Tear resistance ASTM D1004 kN/m 39.5 min Mandrel bend GM9503P -30C, 6 mm diameter mandrel (Note 1) No cracks Note 1: Refer to the mandrel size selection chart below. Mandrel Size Selection Chart Hardness Mandrel
14、 Size Hardness Mandrel Size 50 to 74 Shore A 6 mm 37 to 49 Shore D 25 mm 75 to 95 Shore A 12 mm 50 to 70 Shore D 50 mm Table 2: Mechanical Requirements (Cont.) Properties Test Methods Unit Value Heat Aging 168 h at 80C in an air-circulating oven followed by indicated property testing at 22C. Test me
15、thods are the same as for original mechanical property testing Change in property No objectionable color change or tackiness Tensile Strength 80% retention min Elongation at Break 80% retention min Durometer Hardness Initial value 5 units max Tear Resistance 80% retention min Copyright General Motor
16、s North America Provided by IHS under license with GM Licensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 06/23/2008 23:54:17 MDTNo reproduction or networking permitted without license from IHS -,-,- GM ENGINEERING STANDARDS GMP.PVC.038 Copyright April 2003 General Motors Corporation
17、All Rights Reserved April 2003 Page 3 of 4 3.1.3 Physical Requirements. Table 3: Physical Requirements Properties Test Methods Unit Value Specific gravity ASTM D792 1.14 to 1.20 3.1.4 Additional Requirements. Table 4: Additional Performance Properties Properties Test Methods Unit Value Fogging numbe
18、r GM9305P Type A, 85C % 60 min No Oily Deposits 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 geome- try, before and after exposure. In case of conflict between acce
19、lerated weathering and natural weathering, natural weathering takes precedence. Table 5: Additional Performance Properties Properties Test Methods Unit Value Ultraviolet light stabilized interior materials Exposure to xenon arc apparatus per SAE J1885 at an irradiation of 602 kJ/m2 Color change afte
20、r Xenon and/or Solar E 3.0 (for information only) visual evaluation overrides nu- merical scale approval Accelerated weathering Surface defects Visual No objectionable defects allowed Xenon and Solar 3.2 Performance Requirements. Performance Requirements e.g., flammability, fogging or resis- tance t
21、o odor shall be specified on part drawings or in component specifications. 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 materia
22、ls supplied to this specification must comply with the requirements of GMW3059, Re- stricted and Reportable Substances for Parts. 6 Approved Sources Engineering qualification of an approved source is required for this specification. Only sources listed in the GM Materials File under this specificati
23、on 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: GMP.PVC.038 Copyright General Motors North America Provided by IHS under license wi
24、th GM Licensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 06/23/2008 23:54:17 MDTNo reproduction or networking permitted without license from IHS -,-,- GMP.PVC.038 GM ENGINEERING STANDARDS Copyright April 2003 General Motors Corporation All Rights Reserved Page 4 of 4 April 2003 8 Rel
25、ease and Revisions 8.1 Release. The specification was first approved and released in June 2000 from a 1990 preprint. 8.2 Revisions. Rev Date Description (Organization) A FEB 2003 Reformatted (GMNA) B APR 2003 Revert to GM9305P, Fog- ging to Type A, 85C in Ta- ble 4 and Delete/add typical applications for type change. (GMNA) 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 23:54:17 MDTNo reproduction or networking permitted without license from IHS -,-,-
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