1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW17008 Interior Low Emission Polyoxymethylene Copolymer, Heat Stabilized Copyright 2013 General Motors Company All Rights Reserved August 2013 Page 1 of 4 1 Scope 1.1 Material Description. Polyoxymethylene copolymer designed to meet the globa
2、l emission requirements for interior materials. 1.2 Symbols. All plastic parts must have legible plastic compound identification symbol per GMW3116 and ISO 11469 requirements. Mark must appear on the surface and must not affect form, fit, or function. 1.3 Typical Applications. Parts located within t
3、he refreshable air space of the vehicle interior which are not light stable. 1.4 Remarks. Not applicable. 1.5 Types. The following types apply to this specification: C1 - low melt flow C2 - medium low melt flow C3 - medium high flow C4 - high melt flow 2 References Note: Only the latest approved sta
4、ndards are applicable unless otherwise specified. 2.1 External Standards/Specifications. ISO 75-1/2 ISO 294-3/4 ISO 1183 ISO 3795 ISO 179/1eA ISO 527-1/2 ISO 3146 ISO 9988-2 ISO 188 ISO 1133 ISO 3167 ISO 11469 ISO 294 2.2 GM Standards/Specifications. GMW3013 GMW3221 GMW3235 GMW15634 GMW3059 GMW3232
5、GMW14334 GMW15635 GMW3116 2.3 Additional References. TMC003 Material Safety Data Sheet guidance documents (available at ). 3 Requirements Materials approved to this specification shall meet the standard requirements of GMW3013. 3.1 Requirements on Test Specimens. Unless otherwise specified, injectio
6、n molding of test specimens shall be accomplished per ISO 294 with the conditions for injection molding from ISO 9988-2. Unless otherwise specified, test methods and specimen dimensions are to be in accordance with GMW3013. All tests shall be performed on unannealed specimens immediately following a
7、 conditioning period of 24 h minimum in a controlled atmosphere per GMW3221, Code A, unless otherwise specified. In addition, tests specified at temperatures below or above 23 C shall be conditioned at the specified temperature for 4 h minimum and tested at the specified temperature. 3.1.1 Compound
8、Properties (Natural, Black). The following are also required for full standard approval. The minimum number of lots per test required is one in natural: Stress Strain at multiple temperatures (for example Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot f
9、or ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW17008 Copyright 2013 General Motors Company All Rights Reserved August 2013 Page 2 of 4 -30 C, 23 C, and 85 C), Shear Modulus Curve, Differential Scanning Calorimeter Curve, and Infrar
10、ed Spectroscopy Curve. See GMW3013 for the test procedures. 3.2 Requirements on Delivery. Important physical, mechanical, and thermal properties that characterize the material are summarized in charts. 3.3 Chemical Requirements. All parts manufactured from molding compounds shall be resistant to the
11、 media they contact, such as aliphatic and aromatic hydrocarbons, fuels, lubricants, oils, greases and alcohols, at their places of use. 3.4 Compound Properties. See Table 1. 3.5 Integrally Colored Properties Requirements. Any integrally colored resin (other than generic black) must submit one lot o
12、f Table 1 properties to demonstrate performance and not intended for light stable areas of vehicle. Table 1: Compound Properties (Natural and Black) Property Standard Units C1 C2 C3 C4 Density ISO 1183, Method A, 10 mm x 10 mm x 4 mm g/cm3 1.41 0.03 1.41 0.03 1.41 0.03 1.41 0.03 Tensile Modulus ISO
13、527-1/2, Specimen ISO 3167, 4 mm thick Type A bar, Test speed 1 mm/minute; between 0.05% to 0.25% strain MPa 2200 to 3100 2350 to 3250 2450 to 3350 2450 to 3350 Tensile Stress at Yield ISO 527-1/2, Specimen ISO 3167, 4 mm thick Type A bar, Test speed 50 mm/minute MPa 56 to 70 55 to 70 59 to 73 59 to
14、 73 Poissons Ratio (one lot only) ISO 527-1/2 Specimen ISO 3167, 4 mm thick Type A bar, Tensile method, Test speed 1 mm/minute No units Report Notched Charpy Impact Strength at 22 C ISO 179/1eA, Specimen Machined V-notch, r = 0.25 mm, 80 mm x 10 mm x 4 mm kJ/m2 5 4 3 3 Notched Charpy Impact Strength
15、 at -30 C ISO 179/1eA, Specimen Machined V-notch, r = 0.25 mm, 80 mm x 10 mm x 4 mm kJ/m2 4 3 2 2 Melt Volume Rate (MVR) 190C/2.16 kg or Melt Volume-Flow Rate (MFR) 190C/2.16 kg ISO 1133 g/10 minute or cm3/10 minute 1 to 5 4 to 11 9 to 17 15 to 29 1.2 to 6.0 4.8 to 13.2 10.8 to 20.4 18 to 34.8 Mold
16、Shrink - longitudinal - 48 h after Molding (one lot only) ISO 294-3/4, plaque size 60 mm x 60 mm x 2mm, Type D2 preferred or larger with maximum thickness 4 mm % Report Mold Shrink - transverse - 48 h after Molding (one lot only) ISO 294-3/4, plaque size 60 mm x 60 mm x 2 mm, Type D2 preferred or la
17、rger with maximum thickness 4 mm % Report Melting Temperature ISO 3146, Method A, Method B, Method C (10 K/minute) C 160 to 172 HDT (Heat Deflection Temperature)- 1.8 MPa ISO 75-1/2, Method A, Specimen 80 mm x 10 mm x 4 mm, test flatwise, unannealed C 80 80 80 80 Copyright General Motors Company Pro
18、vided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW17008 Copyright 2013 General Motors Company All Rights Reserved August 2013 Page 3 of 4 Property Standard Units C1 C2 C3 C4 T
19、ensile Strength after Heat Aging 1000 h, 110 C (one lot only) ISO 527-1/2 Sample: 150 mm x 10 mm x 4 mm thick, Type A bar Test speed 50 mm/minute; if tensile strain at yield or break 10%, conditioning temperature defined by ISO 188 MPa Must be 75% retention of original values Notched Charpy Impact S
20、trength at 22 C at Yield after Heat Aging 1000 h, 110 C (one lot only) ISO 179/1eA, Specimen Machined V-notch, r = 0.25 mm, 80 mm x 10 mm x 4 mm conditioning temperature defined by ISO 188 % Must be 75% retention of original values Flammability (one lot only) GMW3232 or ISO 3795 report per requireme
21、nts of GMW3232, Sample 355 mm 2 mm by 100 mm 2 mm 2 mm 0.2mm, thick mm/minute 100 Aldehydes and Ketones Emissions (one lot only) GMW15635 g/g Formaldehyde Chemical Abstract Service (CAS) Number 50-00-0 5 Emissions (one lot only) GMW15634 g/g Volatile Organic Compounds (VOC) 50 Semi-volatile Organic
22、Compounds (SVOC) 100 Fogging (one lot only) GMW3235-B-T2 condensable constituents mg 2, no droplets or crystals are acceptable upon visual examination Chemical Resistance (one lot only) GMW14334-A No units Rating 1 4 Manufacturing Process Not applicable. 5 Rules and Regulations 5.1 Legal Regulations
23、. 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 Inspection and Rejection. Samples of components or mat
24、erials 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 approval must be received for any changes, e.g., propert
25、ies, 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 manner, without solicitation, and to include documenta
26、tion 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 individual cases, a shorter test can be agreed to
27、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 of the Material Safety Data Sheet/Safety Data She
28、et must be submitted in compliance with the Globally Harmonized System of Classification and Labeling of Chemicals (GHS) requirements or other country-specific MSDS/SDS Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networki
29、ng permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW17008 Copyright 2013 General Motors Company All Rights Reserved August 2013 Page 4 of 4 requirements. In addition, product MSDS/SDS submissions must be in compliance with specific country General Motors TMC003 Material S
30、afety 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 this specification must be approved by General Mot
31、ors. 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 for Production Part Approval Process (PPAP) materia
32、l approval. If the decision is made to use a not yet approved material, contact GM 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 Motors. 7 Notes 7.1 Glossary. MATSPC: Global reposito
33、ry of GM approved materials for corresponding GM Engineering Standards. 7.2 Acronyms, Abbreviations, and Symbols. CAS Chemical Abstract Service GHS Globally Harmonized System of Classification and Labeling of Chemicals HDT Heat Deflection Temperature MFR Melt Volume Flow Rate MSDS Material Safety Da
34、ta Sheet MVR Melt Volume Rate PPAP Production Part Approval Process SDS Safety Data Sheet SVOC Semi-volatile Organic Compounds VOC Volatile Organic Compounds 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: Material per GMW17008P-POM-C (number) Where:
35、 GMW = General Motors Worldwide 17008 = Sequential number of specification P = Plastic POM = (Polyoxymethylene) (Acetal) C (number) = Type defined in Table 1 9 Release and Revisions This standard was originated in June 2013. It was first approved by the Plastic Global Subsystem Leadership Team in Au
36、gust 2013. It was first published in August 2013. Issue Publication Date Description (Organization) 1 AUG 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-,-,-
