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1、 ENGINEERING STANDARDS Material Specification Plastics GMP.PVC.075 PVC, 50 Shore D, Interior, Extrusion Molding Compound 1 Scope This specification covers the properties of a 50 shore D hardness, polyvinyl chloride, pellet form, extrusion-molding compound. 1.1 Material Description. 50 Shore D, Extru
2、sion- Molding Compound, Black. 1.3 Symbol. The material abbreviation according to ISO 11469 is PVC. 1.4 Typical Application. Interior moldings. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. ISO 37 ISO 3451-1 IS
3、O 176 SAE J1885 ISO 527 SAE J1960 ISO 868 SAE J1976 ISO 1183 2.2 GM Standards/Specifications. GM9303P GM9503P GM9305P GMW3001 GM9328P GMW3059 GM9329P 3 Requirements 3.1 Requirements on Delivery. 3.1.1Requirements On Test Specimens. Tests shall be conducted using the latest issue of the test methods
4、indicated. Suitable precautions 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. Tests shall be conducted 40 h minimum after molding and immediately following a conditionin
5、g period of 24 hours minimum at 22 3C and 50 5% RH unless otherwise specified. All tests shall be performed on unannealed specimens. In addition, tests specified at temperatures below or above 22 3C shall be conducted at the specified temperature using specimens conditioned at the specified temperat
6、ure for 4 hours minimum. Test specimens shall be 3.2 0.2 mm thick unless otherwise 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 tables must be met by test speci
7、mens 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. 3.1.2 Chemical Requirements. All
8、 parts manufactured from molding compounds shall be resistant to the media they contact, such as aliphatic and aromatic hydrocarbons, fuels, lubricants, oils, greases and alcohols, at their places of use. Copyright 2003 General Motors Corporation All Rights Reserved June 2003 Originating Department:
9、 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 23:29:23 MDTNo reproduction or networking permitted without license from IHS -,-,- GMP.PVC.075
10、GM ENGINEERING STANDARDS Copyright 2003 General Motors Corporation All Rights Reserved Page 2 of 3 June 2003 3.1.3 Mechanical Requirements. See Table 1. Table 1: Mechanical Requirements (Clear/Black/Integrally Colored) Mech. Properties Standard Unit Value Indentation Hardness, ISO 868, 15 second del
11、ay Shore D 45 to55 Tensile Strength ISO 37, Type 1 Dumbbell, 500 mm/minute MPa 14 minimum Elongation at Break ISO 37, Type 1 Dumbbell, 500 mm/minute % 200 minimum Cold Flexibility GM9503P, -30C, 50 mm diameter mandrel. 3.2 0.2mm thickness. Note: Refer to table 3, for mandrel size selection. No crack
12、sNo cracks High Temp. Humidity Aging. Tensile Strength Elongation at break Indentation Hardness GM9329P with Indentation Hardness, Shore A or D. % % A No tackiness 25 25 Initial 5 units max 3.1.4 Physical Requirements. See Table 2. Table 2: Physical Requirements (Clear/Black/Integrally Colored) Phys
13、ical Properties Standard Unit Value Specific Gravity ISO 1183, Method A g/cm3 1.32 to 1.39 Volatile Loss ISO 176 % 2 maximum Mineral Filler ISO 3451-1, Method A % by mass 9 to 22 Fogging Number GM9305P, Type A, test temperature 85C % 60 minimum Colorfastness to Light, Interior. Color Change Surface
14、Defects Xenon Arc per SAE J1885, 601.6 kJ/m2 E E = 3.0 maximum 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 af
15、ter exposure. In case of conflict between accelerated weathering and natural weathering, natural weathering takes precedence. Table 3: Mandrel size selection chart Hardness Mandrel Size Hardness Mandrel Size 50 to 70 Shore A 6 mm 37 to 45 Shore D 25 mm 75 to 95 Shore A 12 mm 50 to 70 Shore D 50 mm C
16、opyright General Motors North America Provided by IHS under license with GM Licensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 06/23/2008 23:29:23 MDTNo reproduction or networking permitted without license from IHS -,-,- GM ENGINEERING STANDARDS GMP.PVC.075 4 Manufacturing Process No
17、t 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 materials supplied to this specification must comply with the requirements of GMW3059, Restricted and Report
18、able 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 (i.e., MATSPC) under this specification number have been qualified by engineering as meeting the requirements of this specifi
19、cation. 7 Coding System This material specification shall be referenced in other documents, drawings, VTS, CTS, etc. as follows: GMP.PVC.075 8 Release and Revisions 8.1 Release. This material specification originated in November 1998 and was approved by GMNA PVC Specialist Team June 2002. It was fir
20、st published in June 2003. Copyright 2003 General Motors Corporation All Rights Reserved Page 3 of 3 June 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 23:29:23 MDTNo reproduction or networking permitted without license from IHS -,-,-