1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW16828 Polypropylene, Glass Fiber Reinforced, In-line Compounded Copyright 2012 General Motors Company All Rights Reserved December 2012 Originating Department: North American Engineering Standards Page 1 of 4 1 Scope 1.1 Material Description
2、. This standard covers the properties of polypropylene, homopolymer or copolymer, that are in-line compounded with long glass fiber reinforcement and injected into a mold or extruded directly into a compression molding process. 1.2 Symbols. The material abbreviation according to ISO 11469 is PP GFXX
3、 . The symbol shall be completed by the supplier according to the Glass Fiber (GF) content of the material. 1.3 Typical Applications. Typical applications include underbody panels, chassis shields and splash shields. 1.4 Remarks. Classifications are grouped according to the different ranges of glass
4、 fiber content. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. ISO 75 ISO 1183 ISO 6603-2 ISO 527-1 ISO 3451-1 ISO 11469 ISO 527-2 ISO 6603-1 SAE J1686 2.2 GM Standards/Specifications. GMW3013 GMW14444 GMW15725
5、GMW3059 GMW14650 GMW3221 GMW14651 2.3 Additional References. TMC003 Material Safety Data Sheet guidance documents (available at ). 3 Requirements Materials approved to this specification shall meet the requirements of GMW3013, General Requirements for Handling of Technical Terms of Delivery for Plas
6、tics. 3.1 Requirements on Delivery. The physical, mechanical and thermal properties that characterize the material are summarized in Table 1. Note: The requirements in Table 1 shall be documented for self-certification of the product according to GMW3013. The color shall be specified on drawings, in
7、 material specifications, and otherwise. 3.1.1 Requirements on Test Specimens. Unless otherwise specified, all specimens for test shall be obtained from compression-molded plaques with a thickness of (2.5 0.5) mm. All tests shall be performed on specimens 40 h minimum after molding and immediately f
8、ollowing a conditioning period of 24 h minimum in a controlled atmosphere per GMW3221, Code A, unless otherwise specified. All tests shall be performed on unannealed specimens. Five (5) coupons minimum shall be tested. The average value is the material property value. 3.1.2 Chemical Requirements. Al
9、l parts manufactured from molding compounds shall be resistant to the media they contact at their place of use. 3.2 Requirements on Materials. See Table 1. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted
10、without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16828 Copyright 2012 General Motors Company All Rights Reserved December 2012 Page 2 of 4 3.3 Performance Requirements. All finished parts for Interior applications shall meet the requirements according to GMW14444 and GMW14651. All
11、finished parts for Exterior applications shall meet the requirements according to GMW14650. All finished parts for Engine Compartment applications shall meet the requirements according to GMW15725. 3.4 Compound Properties. The following are also required for full specification approval, with a minim
12、um of one lot per required test: Poissons Ratio, Stress Strain Curve at +23 C, +85 C, -30 C; DSC Curve; and Infrared Spectroscopy Curve. Table 1: Compound Properties Glass Fiber Content (%) Property Standard Unit 20 30 40 Ash ISO 3451-1, Method A % by Mass 20 3 30 3 40 3 Density ISO 1183, Method A g
13、/cm3 1.04 0.04 1.12 0.04 1.23 0.04 Tensile Strength at Break Note 1 ISO 527-1, ISO 527-2, Specimen A, Test Speed 5 mm/minute MPa 35 45 55 Tensile Modulus Note 1 ISO 527-1/2 MPa 2700 3000 4000 Multiaxial Impact at +23 C, 6.6 m/s ISO 6603-1/2 Total Energy, Sample Size 60 mm x 60 mm J 7 10 15 Multiaxia
14、l Impact at -30 C, 6.6 m/s ISO 6603-1/2 Total Energy, Sample Size 60 mm x 60 mm J 6 8 12 Tensile Strength after Heat Aging 1000 h at 140 C ISO 527-1, ISO 527-2, Specimen A, Test Speed 5 mm/minute % Retention 75 75 75 Deflection Temperature Under Load, 1800 kPa, Method A ISO 75 (refer to SAE J1686),
15、flatwise C 145 150 150 Note 1: Requirements for samples taken from plaques irrespective of flow direction. 4 Manufacturing Process Not applicable. 5 Rules and Regulations 5.1 Legal Regulations. All materials must satisfy applicable laws, rules, regulations and recommendations valid in the country of
16、 usage. 5.2 Language. In the event of conflict between the English and domestic language, the English language shall take precedence. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from I
17、HS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16828 Copyright 2012 General Motors Company All Rights Reserved December 2012 Page 3 of 4 5.3 Inspection and Rejection. Samples of components or materials released to a GM material specification shall be tested for conformity with the requirements of this
18、 material specification and approved by the responsible Engineering department prior to commencement of delivery of bulk supplies. A new approval must be received for any changes, e.g., properties, manufacturing process, location of manufacture, etc. If not otherwise agreed, all testing and document
19、ation normally required for initial release must be completed. It is the responsibility of the supplier to inform the customer in a timely manner, without solicitation, and to include documentation of all modifications of materials and/or processes and to apply for a new release. If not otherwise ag
20、reed, all release tests shall be repeated and documented by the supplier prior to commencement of delivery of non-conforming bulk supplies. In individual cases, a shorter test can be agreed to between the responsible Engineering department and the supplier. 5.4 Material Safety Data Sheets/Safety Dat
21、a Sheets (MSDS/SDS). For new product submissions, or when a change in chemical composition of an existing product has occurred, a complete copy of the Material Safety Data Sheet/Safety Data Sheet must be submitted in compliance with the Globally Harmonized System of Classification and Labeling of Ch
22、emicals (GHS) requirements or other country-specific MSDS/SDS requirements. In addition, product MSDS/SDS submissions must be in compliance with specific country General Motors TMC003 Material Safety Data Sheet/Safety Data Sheet guidance documents where available. 5.5 All materials supplied to this
23、standard must comply with the requirements of GMW3059, Restricted and Reportable Substances for Parts. 6 Approved Sources Materials supplied to this specification must be approved by General Motors. A list of approved materials can be found in MATSPC. This GM Material File is provided to third parti
24、es to reduce redundant testing of materials. If approved material already listed is used, the part supplier can use GM Material File reference for Production Part Approval Process (PPAP) material approval. If the decision is made to use a not yet approved material, contact the involved GM Materials
25、Engineer for detail on the approval process. The material approval process must be completed prior to PPAP start date of the part supplied to General Motors. 7 Notes 7.1 Glossary. MATSPC: Global repository of GM approved materials for corresponding GM Engineering Standards. 7.2 Acronyms, Abbreviatio
26、ns, and Symbols. GF Glass Fiber GHS Globally Harmonized System of Classification and Labeling of Chemicals GSSLT Global Subsystem Leadership Team h Hours MSDS Material Safety Data Sheet PPAP Production Part Approval Process SAE SAE International SDS Safety Data Sheet Copyright General Motors Company
27、 Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16828 Copyright 2012 General Motors Company All Rights Reserved December 2012 Page 4 of 4 8 Coding System This standard s
28、hall be referenced in other documents, drawings, etc., as follows: Material per GMW16828P PP GFXX Where: XX denotes the nominal glass fiber weight percentage 9 Release and Revisions This standard was originated in June 2012. It was first approved by the Composites GSSLT in December 2012. It was first published in December 2012. Issue Publication Date Description (Organization) 1 DEC 2012 Initial publication. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
