1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW16335 Polymethyl Methacrylate Copyright 2012 General Motors Company All Rights Reserved February 2012 Originating Department: North American Engineering Standards Page 1 of 5 1 Scope 1.1 Material Description. This specification describes mat
2、erial types of a transparent and integrally colored Poly(methyl methacrylate) (PMMA) which are used in injection molded components. Code letter and number, in addition to GMW3013 guidelines that apply to this specification, are listed in Table 1. 1.1.1 Paintability. Approved paint systems that can b
3、e used on this material are listed, e.g., in the General Motors Approved Paint on Parts Systems (GM APOPS) database. 1.1.2 Types. The classification into groups is according to the different properties as described in Tables 1 and 2. Weathering requirements for natural and compounded colors are list
4、ed in Table 3. 1.2 Symbols. The material abbreviation according to ISO 11469 is PMMA 90 91 91 90 89 Haze % 90 Accelerated Weathering Colorfastness to Light Note2 SAE J2527 Method A with extended filters 4500 kJ/m2 Change in appearance E 3.0 per ISO 7724-1 or SAE J1545 Gloss 15% Per ASTM D523 No obje
5、ctionable defects allowed ISO 4892-1 ISO 4892-2 5400 kJ/m2 Note 1: Standard test specimen and test setup should follow GMW3013. Either test method is accepted for approval to this specification. Note 2: Three Year Natural Weathering data per SAE J576 JUL91 may be used as substitute for Accelerated W
6、eathering submission. (Published date of the required SAE test specification as specified within FMVSS 108.) Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGIN
7、EERING STANDARDS GMW16335 Copyright 2012 General Motors Company All Rights Reserved February 2012 Page 4 of 5 Table 5: Properties Assigned to Type Property Type High Heat T1 Medium Heat T2 Medium Heat - High Flow T2HF General Purpose T3 Medium Impact T4 High Impact T5 4 Manufacturing Process Not app
8、licable. 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
9、Inspection 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 ap
10、proval 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
11、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 agreed, all release tests shall be repeated and documented by the supplier prior to commencement of delivery of non-conforming bulk supplies.
12、 In individual cases, a shorter test can be agreed to between the responsible Engineering department and the supplier. 5.4 Initial Source Approval. No shipments shall be made by any supplier until representative initial production samples have been approved by the appropriate Materials Engineering d
13、epartment(s) as meeting the requirements of this specification. 5.5 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 of the Material Safety Data Sheet/Safety Data Shee
14、t 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 with specific country General Motors TMC003 Material S
15、afety Data Sheet/Safety Data Sheet guidance documents where available. 5.6 All materials supplied to this standard must comply with the requirements of GMW3059, Restricted and Reportable Substances for Parts. 6 Approved Sources Engineering qualifications of an approved source are required for this s
16、tandard. Only sources listed in the GM Materials File, MATSPC, under this standard number have been qualified by Engineering as meeting the requirements of this standard. 7 Notes 7.1 Glossary. MATSPC: Global repository of GM approved materials for corresponding GM Engineering Standards. 7.2 Acronyms
17、, Abbreviations, and Symbols. CLTE Coefficient of Linear Thermal Expansion DSC Differential Scanning Calorimeter DMA Dynamic Mechanical Analysis ECE Economic Commission for Europe FMVSS Federal Motor Vehicle Safety Standards GHS Globally Harmonized System of Classification and Labeling of Chemicals
18、GM APOPS General Motors Approved Paint on Parts Systems HDT Heat Deflection Temperature MFR Melt Mass Flow Rate MVR Melt Volume Flow Rate MSDS Material Safety Data Sheet PMMA Poly(methyl methacrylate) SDS Safety Data Sheet 8 Coding System This standard shall be referenced in other documents, drawing
19、s, etc., as follows: Material per GMW16335P-PMMA-T1 Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16335 Copyright 2012 General Motors C
20、ompany All Rights Reserved February 2012 Page 5 of 5 Where: GMW = GM Worldwide 16335 = Sequential number P = Plastics PMMA = Poly(methyl methacrylate) T1 = Type defined in Table 1/Table 2 9 Release and Revisions This standard was originated in December 2009. It was first approved by the Global Plast
21、ics Team in September 2010. It was first published in September 2010. Issue Publication Date Description (Organization) 1 SEP 2010 Initial publication. 2 FEB 2012 Adjust certification values from minimum tested to calculated 3 sigma minimum values, added accelerated weathering for integral colored m
22、aterials, added High flow grade of type 2. (Plastics Global Subsystem Leadership Team) Reference List of Regional Specifications GMW16335 Specification GMW16335P-PMMA-T1 QK 003213 Note 1 GMW16335P-PMMA-T2 GMP.PMMA.002 Note 1 GMP.PMMA.007 GMP.PMMA.012 Note 1 QK 003221 Note 1 EDS-M-4501-02 GMW16335P-P
23、MMA-T2HF GMP.PMMA.007 GMW16335P-PMMA-T3 GMP.PMMA.006 Note 1 GMP.PMMA.009 Note 1 QK 003221 Note 1 QK 003211 QK 003212 EDS-M-4501-01 HN1305-1 GMW16335P-PMMA-T4 GMP.PMMA.015 Note 1 QK 003222 HN1305-2 GMW16335P-PMMA-T5 GMP.PMMA.001 QK 003223 Note 1: Slight revisions caused overlap in some specifications and not all past approvals will fit into new Type designations as listed above. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
