1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW16900 Polypropylene, Long Glass Fiber Reinforced, Compression Molded Copyright 2013 General Motors Company All Rights Reserved March 2013 Page 1 of 4 1 Scope 1.1 Material Description. This standard covers the properties of a long glass fiber
2、 mat, pre-impregnated with polypropylene, homopolymer, and used in a compression molding process. 1.2 Symbols. The material abbreviation according to ISO 11469 is PP GFXX . The symbol shall be completed by the supplier according to the Glass Fiber (GF) content of the material. 1.3 Typical Applicatio
3、ns. Typical applications include non-Class “A” surface appearance structural components such as the following: underbody panels, chassis shields, radiator support brackets, seat backs, bumper beams, battery trays, header panels. 1.4 Remarks. The classification into groups is according to the differe
4、nt ranges of glass 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 6603-1/2 ISO 11469 ISO 178 ISO 3451-1 ISO 11359-2 SAE J1686 ISO 527-1/2 2.2 GM Standards/Specifications. GMW30
5、13 GMW3221 GMW14650 GMW15725 GMW3059 GMW14444 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 Deliv
6、ery for Plastics. 3.1 Requirements on Delivery. The physical, mechanical and thermal properties that characterize the material are summarized in Table 1. Note: The requirements to Table 1 shall be documented for self-certification of the product according to GMW3013. The color shall be specified on
7、drawings, in material specifications, and otherwise. 3.1.1 Requirements on Test Specimens. Unless otherwise specified, all specimens for test shall be obtained from molded plaques with a thickness of 2.5 mm 0.5 mm. The specimens shall be molded using temperatures and pressures typical of those used
8、in production. All tests shall be performed on specimens 40 h minimum after molding and immediately following 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 coupons minimum s
9、hall be tested. The average value is the material property value. 3.1.2 Chemical Requirements. All 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. 3.3 Performance Requirements. All finished part
10、s for Interior applications shall meet the requirements according to GMW14444. All finished parts for Exterior applications shall meet the requirements according to Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking p
11、ermitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16900 Copyright 2012 General Motors Company All Rights Reserved March 2013 Page 2 of 4 GMW14650. All finished parts for Engine Compartment applications shall meet the requirements according to GMW15725. 3.3.1 Limitations. Pa
12、rts made of this material are subject to the following limitations. 3.3.1.1 Maximum continuous use temperature shall not exceed 125 C. 3.3.1.2 Maximum short term use, 30 minutes, shall not exceed 145 C. 3.4 Compound Properties. The following are also required for full specification approval. The min
13、imum number of lots per test required is one: Poissons Ratio, Stress Strain Curve at +23 C, +85 C, -30 C; Differential Scanning Calorimetry (DSC) Curve; and Infrared Spectroscopy Curve. Table 1: Compound Properties Note 1, Note 2 Property Standard Unit Type 1 Type 2 Ash ISO 3451-1, Method A % by Mas
14、s 30 3 40 3 Specific Gravity ISO 1183, Method A g/cm3 1.14 0.04 1.22 0.04 Tensile Strength at Break ISO 527-1, ISO 527-2, Specimen A, test speed 5 mm/minute MPa 65 84 Tensile Elongation at Yield ISO 527-1/2 % 1.8 1.6 Tensile Modulus ISO 527-1/2 MPa 5100 5500 Flexural Modulus At 23 C At 80 C ISO 178,
15、 Method 1 MPa 3550 2300 4100 2400 Multiaxial Impact at +23 C, 2.2 m/s ISO 6603-1/2 Energy at maximum load, Sample Size 60 mm x 60 mm J 12 16 Multiaxial Impact at -30 C, 2.2 m/s ISO 6603-1/2 Energy at maximum load, Sample size 60 mm x 60 mm J 10 12 Tensile Strength after Heat Aging 1000 h at 100 C IS
16、O 527-1, ISO 527-2, specimen A, test speed 5 mm/minute % retention 75 75 Deflection Temperature Under Load, 1800 kPa, Method A ISO 75 (refer to SAE J1686), flatwise C 155 155 Coefficient of Linear Thermal Expansion (CLTE) Parallel to flow Transverse to flow ISO 11359-2 Thermal Mechanical Analysis (T
17、MA), mean secant value over the temperature range -40 C to 85 C mm/mm/C Report Report Note 1: Minimum requirements are listed unless otherwise stated. Note 2: Unless otherwise stated, requirements are for samples obtained from plaques irrespective of flow direction. Copyright General Motors Company
18、Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16900 Copyright 2012 General Motors Company All Rights Reserved March 2013 Page 3 of 4 4 Manufacturing Process Not applica
19、ble. 5 Rules and Regulations 5.1 Legal Regulations. All materials must satisfy applicable laws, rules, regulations and recommendations valid in the country of usage. 5.2 Language. In the event of conflict between the English and domestic language, the English language shall take precedence. 5.3 Insp
20、ection and Rejection. Samples of components or materials released to a GM material specification shall be tested for conformity with the requirements of this material specification and approved by the responsible Engineering department prior to commencement of delivery of bulk supplies. A new approv
21、al must be received for any changes, e.g., properties, manufacturing process, location of manufacture, etc. If not otherwise agreed, all testing and documentation normally required for initial release must be completed. It is the responsibility of the supplier to inform the customer in a timely mann
22、er, without solicitation, and to include documentation of all modifications of materials and/or processes and to apply for a new release. If not otherwise agreed, all release tests shall be repeated and documented by the supplier prior to commencement of delivery of non-conforming bulk supplies. In
23、individual cases, a shorter test can be agreed to between the responsible Engineering department and the supplier. 5.4 Material Safety Data Sheets/Safety Data Sheets (MSDS/SDS). For new product submissions, or when a change in chemical composition of an existing product has occurred, a complete copy
24、 of the Material Safety Data Sheet/Safety Data Sheet must be submitted in compliance with the Globally Harmonized System of Classification and Labeling of Chemicals (GHS) requirements or other country-specific MSDS/SDS requirements. In addition, product MSDS/SDS submissions must be in compliance wit
25、h specific country General Motors TMC003 Material Safety Data Sheet/Safety Data Sheet guidance documents where available. 5.5 All materials supplied to this standard must comply with the requirements of GMW3059, Restricted and Reportable Substances for Parts. 6 Approved Sources Materials supplied to
26、 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 parties to reduce redundant testing of materials. If approved material already listed is used, the part supplier can use GM Material File reference
27、for Production Part Approval Process (PPAP) material approval. If the decision is made to use a not yet approved material, contact Materials Engineering for details on the approval process. The material approval process must be completed prior to PPAP start date of the part supplied to General Motor
28、s. 7 Notes 7.1 Glossary. MATSPC: Global repository of GM approved materials for corresponding GM Engineering Standards. 7.2 Acronyms, Abbreviations, and Symbols. CLTE Coefficient of Linear Thermal Expansion DSC Differential Scanning Calorimetry GF Glass Fiber GHS Globally Harmonized System of Classi
29、fication and Labeling of Chemicals MSDS Material Safety Data Sheet PPAP Production Part Approval Process SDS Safety Data Sheet TMA Thermal Mechanical Analysis Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitt
30、ed without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16900 Copyright 2012 General Motors Company All Rights Reserved March 2013 Page 4 of 4 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: Material per GMW16900P PP GFXX, where XX deno
31、tes the nominal glass fiber weight percentage. 9 Release and Revisions This standard was originated in December 2012. It was first approved by the Composites Global Subsystem Leadership Team in March 2013. It was first published in March 2013. Issue Publication Date Description (Organization) 1 MAR 2013 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-,-,-
