1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW16892 Polypropylene Copolymer Glass Fiber Reinforced, Chemically Coupled, Heat Stabilized Copyright 2013 General Motors Company All Rights Reserved July 2013 Page 1 of 6 1 Scope 1.1 Material Description. This specification covers the propert
2、ies of injection moldable, glass fiber reinforced, chemically coupled, heat stabilized polypropylene copolymer. 1.2 Symbols. The material abbreviations according to ISO 11469 are shown in Table 1. 1.3 Typical Applications. Typical applications include the following: fan shrouds, under hood parts, cl
3、adding supports, brackets. 1.4 Remarks. The classification into groups is according to the different ranges of glass fiber content. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. ASTM D3012 ISO 179/1eA ISO 1183
4、ISO 11359-1/2 ISO 75-1 ISO 179/1eU ISO 1873-2 ISO 11469 ISO 75-2 ISO 188 ISO 3167 ISO 75-3 ISO 294 ISO 3451-1 ISO 178 ISO 527-1/2 ISO 4577 2.2 GM Standards/Specifications. GMW3013 GMW3205 GMW3232 GMW3059 GMW3221 GMW3235 2.3 Additional References. TMC003 Material Safety Data Sheet guidance documents
5、(available at ). 3 Requirements 3.1 Requirements on Test Specimens. Reference GMW3221. 3.1.1 Materials approved to this specification shall meet the requirements of GMW3013, General Requirements for Handling of Technical Terms of Delivery for Plastics. 3.1.1.1. Requirements on Delivery. Important ph
6、ysical, mechanical, and thermal properties that characterize the material are summarized in Table 1. Note: For each product, the requirements to Table 1 shall be documented by Certification Statement according to GMW3013. The color shall be specified on drawings, in material specifications and other
7、wise. 3.2 Requirements on Test Specimens. 3.2.1 Unless otherwise specified, injection molding of test specimens shall be accomplished per ISO 294 with the conditions for injection molding from ISO 1873-2. Test methods and specimen dimensions are also to be in accordance with ISO 1873-2. Test methods
8、 and specimen dimensions are also to be in accordance with ISO 1873-2 with the following additions: Use ISO 3167; Type A, thickness 4 mm, for tensile and flexural properties. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or ne
9、tworking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16892 Copyright 2013 General Motors Company All Rights Reserved July 2013 Page 2 of 6 3.2.2 All tests shall be performed on specimens 40 h minimum after molding and immediately following a conditioning period of 24
10、 h minimum in a controlled atmosphere per GMW3221, Code A, unless otherwise specified. All tests shall be performed on unannealed specimens. In addition, test specified at temperatures below or above 23 C 3 C shall be conducted at the specific temperature using specimens conditioned at specified tem
11、perature for 4 h minimum. 3.2.3 The values specified in Table 1 shall be met by test specimens in natural or black. For integrally colored grades where other additive systems (e.g., stabilizer) are used, the impact values shall not decrease more than 10% from the specified minimum value. 3.3 Chemica
12、l Requirements. All parts manufactured from molding compounds shall be resistant to the media they contact at their place of use. 3.4 Compound Properties. See Table 1. The following are also required for full specification approval. The minimum number of lots per test required is one (1) in natural.
13、 Tensile Modulus, Poissons Ratio, Stress Strain Curve at +23 C, +85 C, -30 C. 3.5 Performance Requirements. Performance requirements shall be specified on part drawings or in component specifications. Table 1: Compound Properties (Black or Natural) Property Test Method Units Nominal Glass Fiber Fill
14、er Percentage 5% 10% 20% 30% 40% 50% ISO Symbol ISO 11469 - PP/PE-GF05PP/PE-GF10PP/PE-GF20PP/PE-GF30PP/PE-GF40PP/PE-GF50PP/PE-GF05PP/PE-GF10PP/PE-GF20PP/PE-GF30PP/PE-GF40PP/PE-GF50 None Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
