1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW17024 Transport Protective Cover Material Copyright 2013 General Motors Company All Rights Reserved December 2013 Page 1 of 5 1 Scope 1.1 Material Description. This standard specifies the requirements for the non-woven fabric for exterior pa
2、int protection. 1.2 Symbols. 1.3 Typical Applications. The material specified by this standard is designed for protecting the coating of the finish vehicle body for typically a six month period during the transport of the vehicle from the assembly plant to the dealer. 2 References Note: Only the lat
3、est approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. FMVSS 302 ISO 5084 ISO/IEC 17025 SAE J2527 2.2 GM Standards/Specifications. GMW3010 GMW3221 GMW3402 GMW14124 GMW3059 GMW3232 GMW3405 GMW14334 GMW3182 GMW3326 GMW14108 2.3 Additional References. T
4、MC003 Material Safety Data Sheet guidance documents (available at ). 3 Requirements 3.1 Requirements on Test Specimens. Reference GMW3221. 3.1.1 Test Data. Lab testing shall be performed by a laboratory that conforms (meets requirements but may not be formally recognized by a third party) to ISO/IEC
5、 17025 and is acceptable to the responsible GM Department. Test reports must conform to ISO/IEC 17025 .Supplier shall submit a letter of compliance. 3.1.2 Material Construction Specification. All required information shall be reported on the Construction Certification Data Form in Appendix A. A form
6、 shall be submitted along with each carpet material submitted for Engineering Approval. Established values for a construction will be reported on and controlled within the limits established on the Construction Certification Data Form. See Appendix A. 3.1.3 Standard Conditions (GMW3221-A). All test
7、specimens shall be conditioned to GMW3221, Code A, for a minimum of 24 h, unless the test method indicates that standard conditioning is not required or that other conditions apply. 3.1.4 Sampling. When multiple test specimens are required, they shall be taken diagonally across the sample so that no
8、 two test specimens overlap in the same row of yarns. Avoid taking specimens from damaged, contaminated, or defective areas caused by improper handling or manufacturing. 3.1.5 Data Reporting. If all individual readings of a specific test meet or exceed the specified requirements, report the average.
9、 Unless otherwise stated, any individual reading outside the specified limit does not meet the requirement. Report all individual test results that do not meet the requirements. All required information shall be reported on the appropriate Construction Certification Data Form (Appendix A). 3.1.6 Dev
10、iations from Defined Test Methods. Deviations from the conditions of any test method shall have been agreed upon between supplier and vehicle manufacturer. All deviations shall be specified on the component drawings, material specifications, etc. and shall be indicated on test certificates, reports,
11、 etc. 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 GMW17024 Copyright 2013 General Motors Company All Rights Reserved December 2013 Page
12、2 of 5 3.1.7 Documentation. Samples of components or materials released to this specification shall be tested for conformity with the requirements of this specification and approved by the responsible GM Department prior to the start of delivery of production level components or materials. Any chang
13、e to the component or material, e.g., design, function, properties, manufacturing process and/or location of manufacture requires a new release of the product. It is the sole responsibility of the supplier to provide the customer, unsolicited, with documentation of any change of modification to the
14、product/process, and to apply for a new release. If not otherwise agreed to the entire verification test shall be repeated and documented by the supplier prior to start of delivery of the modified or changed product. In some cases a shorter test can be agreed to between the responsible GM Department
15、 and the supplier. 3.2 Construction Requirements. 3.2.1 Weight (GMW3182). Test three specimens. Report the results in gram/square meters. Refer to the Construction Certification Data Form in Appendix A for weight specification requirements. 3.2.2 Thickness (ISO 5084). Refer to the Construction Certi
16、fication Form. Report the average for three specimens in millimeters to the nearest 0.01 mm. Use a 4.0 N load and a 200 mm 0.8 mm diameter presser foot to achieve a pressure of 0.127 kPa. All readings should be taken after the presser foot has been in contact with the material for at least 5 s. The
17、specimen size shall be 100 mm x 100 mm. 3.2.3 Tensile Strength and Elongation (GMW3010, Code S). Test three specimens each machine direction (MD) and cross machine direction (CMD). Report the average tensile strength at break and elongation at 50 N in each direction. The minimum requirements shall b
18、e 200 N for MD and 150 N for CMD. The elongation shall be minimum 5% in each direction. 3.2.4 Tear Strength-Trapezoid Tear (GMW3326). Test three specimens for MD and three specimens for CMD. The minimum average value shall be 100 N. 3.2.5 Seam Fatigue (GMW3405). 3.2.5.1 For Sewed Seams. The joining
19、seam of the fabric shall have no slippage (increased distance between rows of yarns), noticeable fiber or yarn breakage, fractures of the sew line, needle hole elongation higher than 2 mm, nor an objectionable seam appearance after 1000 cycles. 3.2.5.2 For Welded Seams. The tensile strength shall be
20、 tested. 3.2.6 Dimensional Stability (GMW14124, Two Cycles M). The specimens shall exhibit a satisfactory rating and show no cracking, crazing, no color change, no cloudiness, blistering, and no loss of the adhesion to the substrate between the layers of the composite or other changes detrimental to
21、 serviceability. Dimensional changes shall be less than 5%. 3.2.7 Humidity Resistance. The specimens shall be exposed for 168 h in a humidity cabinet operating at 40 C 3 C, and 93% 5% relative humidity (RH). The test specimens shall show no significant surface change, particularly changes in color o
22、r gloss, or other changes detrimental to serviceability. 3.2.8 Resistance to the Heat Aging. The specimens shall be exposed for 168 h in a convectional oven at 85 C. The test specimens shall show no significant surface change, particularly changes in color or gloss, or other changes detrimental to s
23、erviceability. 3.2.9 Cold Resistance (GMW14108, 4 h at -30 C). The specimens shall show no cold crack or other changes of the surface or other changes detrimental to serviceability. 3.2.10 Chemical Resistance (GMW14334, Code B). Test specimens shall show no significant surface changes, particularly
24、changes in gloss or color, no embrittlement, no objectionable shrinkage or other changes detrimental to serviceability. 3.2.11 Soil and Cleaner Resistance (GMW3402, GMW3221 Ultraviolet (UV) Part A and B, Soil Agents: A, B, H, I). Test specimens shall show no significant surface changes, particularly
25、 changes in gloss or color, no embrittlement, no objectionable shrinkage or other changes detrimental to serviceability. 3.2.12 Compatibility. The material specimens must be tested to the paint system compatibility, by exposing the paint panel and the cover material, as a composite using 2 kg weight
26、 applied over for 96 h at 70 C. No paint surface damage, loss of gloss, or any sign of cover material transfer to the paint panel shall be noticed. 3.2.13 Accelerated Weathering (SAE J2527, Extended UV Filters, 632 kJ/m2). The test specimens shall show no sign of significant color or gloss change. M
27、inimum 4 of AATCC gray scale rating. 3.2.14 Flammability (GMW3232). The maximum burn rate shall be less than 100 mm/minute and must comply with FMVSS 302. The test report must be completed. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo rep
28、roduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW17024 Copyright 2013 General Motors Company All Rights Reserved December 2013 Page 3 of 5 4 Manufacturing Process Not applicable. 5 Rules and Regulations 5.1 Legal Regulations. All materials must sat
29、isfy 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 materials released to a GM
30、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., properties, manufacturing proce
31、ss, 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 documentation of all modification
32、s 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 between the responsible
33、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 Sheet must be submitted in
34、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 Safety Data Sheet/Safety
35、 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 Motors. The appropriate GM
36、 Materials Engineering department(s) must confirm material as meeting the requirements of this specification. Any test data sheets of material submitted to General Motors for such confirmation (e.g., during Production Part Approval Process (PPAP) under this material specification must list all prope
37、rties and must apply corresponding test methods of this material specification. 7 Notes 7.1 Glossary. MATSPC: Global repository of GM approved materials for corresponding GM Engineering Standards. 7.2 Acronyms, Abbreviations, and Symbols. Avg. Average CMD Cross Machine Direction GHS Globally Harmoni
38、zed System of Classification and Labeling of Chemicals MD Machine Direction MSDS Material Safety Data Sheet PPAP Production Part Approval Process RH Relative Humidity SDS Safety Data Sheet UV Ultraviolet Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot fo
39、r ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW17024 Copyright 2013 General Motors Company All Rights Reserved December 2013 Page 4 of 5 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follow
40、s: Material per GMW17024 9 Release and Revisions This standard was originated in July 2013. It was first approved by the Textiles & Trim Materials Global Subsystem Leadership Team in December 2013. It was first published in December 2013. Issue Publication Date Description (Organization) 1 DEC 2013
41、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-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW17024 Copyright 2013 General Motors Company All Rights Reserved Dece
42、mber 2013 Page 5 of 5 Appendix A Data Sheet A1: Transport Cover Material Construction Certification Data Form Supplier: Laboratory: Piece No./Lot No: Date: Test Engineer: Signature: Date: _ LINE NO. TEST SPECIFICATION RESULTS Meets Does NOT Meet COMMENTS 3.2.1 Weight (GMW3182) g/m 3.2.2 Thickness (I
43、SO 5084) mm 3.2.3 Breaking Load (GMW3010) (N) Avg. MD CMD N 3 MD CMD N Elongation (GMW3010) (N) Avg. MD CMD N 3 MD CMD N 3.2.4 Trapezoid Tear Strength (GMW3326) (N) Avg. MD CMD N 3 MD CMD N 3.2.5 Seam Fatigue (GMW3405) 3.2.6 Dimensional Stability (GMW14124) % 3.2.7 Humidity Resistance 3.2.8 Heat Agi
44、ng 3.2.9 Cold Resistance (GMW14108) 3.2.10 Chemical Resistance (GMW14334, Code B) 3.2.11 Soil and Cleaner Resistance (GMW3402) 3.2.12 Compatibility 3.2.13 Accelerated Weathering (SAE J2527), 632kJ/m23 3.2.14 Flammability (GMW3232) Per report form Avg. = Average CMD = Cross Machine Direction MD = Machine Direction Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
