1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW15064 Polyurethane Foam for Molded Parts Copyright 2012 General Motors Company All Rights Reserved September 2012 Originating Department: North American Engineering Standards Page 1 of 7 1 Scope 1.1 Material Description. Polyurethane (PUR) f
2、oam based on Methylene diphenyl diisocyanate (MDI) or Methylene diphenyl diisocyanate/Tolylene diisocyanate (MDI/TDI). 1.2 Symbols. Not applicable. 1.3 Typical Applications. For filling and back foaming of molded parts to drawing, e.g., upholstery foam for headrests, frame foam headrest, full foam h
3、eadrest (rear back, center). 1.3.1 Types. See 3.1.3. 1.4 Remarks. Some sections reference both GMW test method and local test methods. As soon as the GMW is available, it supercedes the local test methods. 2 References Note: Only the latest approved standards are applicable unless otherwise specifie
4、d. 2.1 External Standards/Specifications. ASTM D3574-J1/J2 ISO 105-A02 ISO 1798 ISO 1923 CMVSS 302 ISO 845 ISO 1856 ISO 8067 FMVSS 302 2.2 GM Standards/Specifications. GMW3059 GMW3232 GMW4659 GMW14357 GMW3205 GMW3235 GMW6992 GMW14363 GMW3221 GMW3259 GMW8081 2.3 Additional References. TMC003 Material
5、 Safety Data Sheet guidance documents (available at ). 3 Requirements 3.1 General. This material is a PUR - soft foam whose composition and properties are suited to its application. The molded parts manufactured from this foam must be equal in foam structure, cell size, mechanical properties, and su
6、rface quality (closed skin/densified surface area) and correspond to each other. They may have no unfoamed areas (shrinkage spots), no cracks and no dense areas (streaks) which could have adverse affects on serviceability. Foamed inserts must be securely bound to the foam or fixed by constructional
7、means (finning, corrugation, etc.) and may have no shrinkage spots or cracks around them. The foamed inserts shall be securely bound to the foam to avoid a crack at misuse. The foam molded part must be physiologically unobjectionable. It must be free from constituents which could cause health damage
8、s or skin irritations. The foam part may have no extractable and/or volatile constituents which could result in migration or contact effects with covering fabrics. 3.1.1 Type 1 and Type 4. This material is a flexible, open-cell high resilient (HR) foam based on polyether whose composition and proper
9、ties are suited to its application. This particularly applies to its fatigue resistance, permanent set, humidity ageing and loss of elasticity. The surface of the molding shall be open to ensure sufficient air permeability. This can be obtained either by the formulation of the foam or by mechanical
10、post-treatment of the moldings. 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 GMW15064 Copyright 2012 General Motors Company All Rights Re
11、served September 2012 Page 2 of 7 3.1.2 Type 2 and Type 3. This material is a PUR - soft foam whose composition and properties are suited to its application. 3.1.3 Type Descriptions. 3.1.3.1 Type 1. This type is an upholstery PUR foam based on MDI or MDI/TDI mix for headrests. 3.1.3.2 Type 2. This t
12、ype is a PUR soft foam based on MDI, free of Chlorofluorocarbons (CFC), for filling and back foaming of molded parts to drawing, e.g., frame and full foam headrests. 3.1.3.3 Type 3. This type is a PUR soft foam based on MDI, free of CFC, for filling and back foaming of full foam headrests, e.g., rea
13、r back center headrest. 3.1.3.4 Type 4. This type is a polyether based PUR foam for rear seat backs, armrests, and headrests. 3.2 Test Piece and Number. If it is not possible to take test pieces from a molded part, then suitable plates shall be manufactured for the test (taken from equal manufacturi
14、ng process, recipe of foam and density). The test piece shall be taken without skin and in rising direction of foam. 3.3 Conditioning. Immediately prior to test, all test pieces shall be pre dried at +70 C 3 C and conditioned. The pre-drying period shall be 16 h for tests conducted after humidity ag
15、ing to GMW14357/ASTM D3574-J and shall be 3 h for other tests. Following pre-drying, all test pieces shall be conditioned to GMW3221, Code A. 3.4 Required Performance Values. All requirements listed in Table 1 shall be fulfilled by the delivered foam and shall be documented by the supplier in the Ce
16、rtification Data Form (see Appendix A). 3.5 Basic Foam Physical Properties. All requirements listed in Table 2 shall be fulfilled by the delivered foam and shall be documented by the supplier in the Foam Certification Data Form (see Appendix A). Values indicated with “TBD” (to be determined) shall b
17、e documented and may be noted on the drawing/in the math data for production quality check purposes. Values indicated with “N/R” are not required. Documentation of additional properties may be required by the approving region. Table 1: Required Performance Values for Documentation Note 1 Performance
18、 Test Method Specified Value Fogging/Volatility of Organic Constituents GMW3235 Method B-Y1-T1 (gravimetric, 1 day pre-drying, +90 C test temperature) 2 mg Flammability GMW3232 Must comply to CMVSS 302, FMVSS 302 Interior Emissions GMW8081 (relative emission) 1.0 Resistance to Odor GMW3205 - Wet con
19、dition (Code A) Rating 6 minimum Dry condition (Code B) Rating 6 minimum Steam Autoclave PUR-Foam-Polyether: 5 h, +120 C 3 C GMW14357-E/ASTM D3574-J2 No visible degradation PUR-Foam-Polyester: 3 h, +105 C 3 C GMW14357-D/ASTM D3574-J1 No visible degradation Mildew GMW3259 No mildew Compatibility Note
20、 1 GMW4659 - Color Stability of the Cover Layer Color Change Shade Change (if cover layer is leather or plastic roll good only) Visual Evaluation to GMW6992: No color change, slight darken permissible Grayscale to ISO 105-A02 Rating 3 Copyright General Motors Company Provided by IHS under license wi
21、th General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW15064 Copyright 2012 General Motors Company All Rights Reserved September 2012 Page 3 of 7 Performance Test Method Specified Value Other Changes No advers
22、e changes of shape, surface as the physical and chemical properties Note 1: Foam shall meet compatibility in the production intended composite. The test pieces shall be sewed or welded (dependent on use), using production techniques, to all possible combinations of composite materials taken at the s
23、ame time from production to form a test pack. Note: For any changes in the quality of any of the composite materials, compatibility tests shall be repeated. At the discretion of the approving GM Engineer, foam material may be tested to standard composite materials for initial foam approval, e.g., a
24、standard vinyl. Nevertheless, final foam approval shall be achieved in the production intended composite. Table 2: Basic Foam Physical Properties Note 1, Note 2 Property Test Method Unit Type 1 and 2 3 4 Hardness Number GMW14363-A1 Note 1 - Per Design Req Per Design Req Per Design Req Density ISO 84
25、5 Note 2 kg/m Per Design Req Per Design Req Per Design Req Tensile Strength ISO 1798 kPa 100 80 82 Elongation ISO 1798 % 75 50 100 Tear Strength ISO 8067 Nm 200 125 180 Compression Set at 50%, 22 h at +70 C ISO 1856A but recovery time 60 10 minutes Note 2 % - - - As received condition 10 18 12.5 Aft
26、er Steam Autoclave (see Table 1) 15 20 15 Note 1: Deviating from the test method, the main load shall be 40 N and the test speed shall be 30 mm/minute for frame headrest foam and 50 mm/minute for full foam molded parts. Note 2: Determination of linear dimensions per ISO 1923. But compressive force o
27、f foot is 500 Pa (0.5 kPa) 5% and a 50 mm 0.1 mm diameter pressure. All readings should be taken after the pressure foot has been in contact with the material for at least 5 s. 4 Manufacturing Process Not applicable. 5 Rules and Regulations 5.1 Legal Regulations. All materials must satisfy applicabl
28、e 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 materials released to a GM material speci
29、fication 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., properties, manufacturing process, location o
30、f 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 documentation of all modifications of materials
31、 and/or processes and to apply for a new release. 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 GMW15064 Copyright 2012 General Motors Com
32、pany All Rights Reserved September 2012 Page 4 of 7 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 between the responsible Engineering
33、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 department(s) as meeting the requirements of this specification. 5.5 Material Safety Data S
34、heets/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 Sheet must be submitted in compliance with the Globally Harmonized System of Classification an
35、d 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 Safety Data Sheet/Safety Data Sheet guidance documents where available. 5.6 All materials s
36、upplied 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 standard. Only sources listed in the GM Materials File, MATSPC, under this standard number
37、have been qualified by Engineering as meeting the requirements of this standard. For other GM locations, the responsible Engineering group should be contacted to obtain the approved source in that individual country. 7 Notes 7.1 Glossary. MATSPC: Global repository of GM approved materials for corres
38、ponding GM Engineering Standards. Methylene diphenyl diisocyanate (MDI): Foam B-component (isocyanate component) is made of methylene diphenyl diisocyanate CAS Nr: 101-68-8 and its pre-polymers. Tolylene diisocyanate (TDI): Foam B-component (isocyanate component) is made of tolylene diisocyanate dii
39、socyanate CAS-Nr: 584-84-9 and its pre-polymers. 7.2 Acronyms, Abbreviations, and Symbols. CAS Chemical Abstracts Service CFC Chlorofluorocarbons DUNS No. Data Universal Numbering System GHS Globally Harmonized System of Classification and Labeling of Chemicals HR High Resilient MDI Methylene diphen
40、yl diisocyanate MSDS Material Safety Data Sheet N/R Not Required PUR Polyurethane SDS Safety Data Sheet TBD To be Determined TDI Tolylene diisocyanate 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: Material per GMW15064 Copyright General Motors Comp
41、any Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW15064 Copyright 2012 General Motors Company All Rights Reserved September 2012 Page 5 of 7 9 Release and Revisions Thi
42、s standard was originated in February 2006. It was first approved by the General Foam Materials Team in August 2006. It was first published in August 2007. Issue Publication Date Description (Organization) 1 AUG 2007 Initial publication. 2 SEP 2012 Five year refresh of standard. Added new GMW test m
43、ethods. (Textiles & Trim Materials Global Subsystem Leadership Team) 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 GMW15064 Copyright 2012
44、 General Motors Company All Rights Reserved September 2012 Page 6 of 7 Appendix A Data Sheet A1: Foam Certification Data Form Supplier: Date: Laboratory: Vendor DUNS No: GM Foam Code: Lab No: GMW15064 Type: Batch No: PUR Foam Based on: MDI TDI MDI/TDI Polyether Polyester Manufacturing Location: Cons
45、truction Verbal Description: Submit SpecimenGMW15064 Specification Method Unit Specified Value Results Meets DoesNOT Meet Comments Table 1 Fogging/Volatility of Organic Constituents GMW3235 Method B-Y1-T1 (gravimetric, 1 day pre-drying, +90 C test temperature) mg 2 mg Table 1 Flammability GMW3232 -
46、Must comply to FMVSS/ CMVSS 302 Table 1 Interior Emissions GMW8081 (relative emission) - 1.0 Table 1 Resistance to Odor GMW3205 Table 1 Wet condition (Code A) Rating 6 Table 1 Dry condition (Code B) Rating 6 Table 1 Steam Autoclav PUR-Foam-Polyether: 5 h, +120 C 3 C GMW14357-E/ ASTM D3574-J2 - No vi
47、sible degra- dation PUR-Foam-Polyester: 3 h, +105 C 3 C GMW14357-D/ ASTM D3574-J1 - No visible degra-dation 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 ENGINE
48、ERING STANDARDS GMW15064 Copyright 2012 General Motors Company All Rights Reserved September 2012 Page 7 of 7 GMW15064 Specification Method Unit Specified Value Results Submit SpecimensMeets DoesNOT Meet Comments Table 1 Mildew GMW3259 - No mildew Table 1 Compatibility GMW4659 - Color Stability of the Cover Layer Color Change Shade Change No color change, slight darken permiss-ible, Grayscale to ISO 105-A02 Rating 3 Other Changes No adverse changes of shape, surface as the physical and chemical
