1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW15757 Low Wear Non-woven Carpet for Protected Applications Copyright 2013 General Motors Company All Rights Reserved December 2013 Page 1 of 10 1 Scope This specification describes low weight, non-woven carpet materials that are suitable for
2、 floor applications. 1.1 Material Description. The material is low wear and is generally used on entry level vehicles with special provisions for testing and usage, including mandatory floor mats and complete protection of the ingress/egress areas and protection of the transmission tunnel areas. (Se
3、e 3.2.7.) 1.1.1 Material Identification. The material shall be constructed using synthetic fibers, dyed and finished with an approved backing to become acceptable in color, pattern and physical properties as outlined in this specification. 1.2 Symbols. This code defines the material construction and
4、 will be assigned by the responsible department. 1.3 Typical Applications. Suitable for molded floor carpets. Note: For requirements for vehicles without solar absorbing glass, contact the appropriate Materials Engineer. All interior materials are developed to be used in vehicles with solar glass; t
5、herefore, performance may be compromised if used in non-solar glass vehicles. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. ISO/IEC 17025 ISO 105-A02 ISO 105-B06 ISO 13937-2 ISO 105-A01 ISO 105-A03 ISO 5084 2.2
6、 GM Standards/Specifications. GMW3010 GMW3232 GMW4217 GMW14128 GMW3059 GMW3235 GMW6992 GMW14141 GMW3182 GMW3259 GMW8081 GMW14162 GMW3205 GMW3387 GMW14102 GMW15634 GMW3208 GMW3402 GMW14108 GMW15635 GMW3221 GMW3417 GMW14125 GMW16853 2.3 Additional References. TMC003 Material Safety Data Sheet guidance
7、 documents (available at ). 3 Requirements 3.1 General Requirements. 3.1.1 Test Data. Lab testing is to be performed by a laboratory that conforms (meets requirements but may not be formally recognized by a third party) to ISO/IEC 17025 and is acceptable to the responsible GM Department. Test report
8、s 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 Carpet Construction Certification Data Sheet (see Appendix A, Data Sheet A1). The form shall be submitted along with each carpet
9、 material submitted for Engineering Approval. Established values for a construction will be reported on and controlled within the limits established on the Carpet Construction Certification Data Sheet. 3.1.3 Standard Conditions (GMW3221, Code A). All test specimens shall be conditioned to GMW3221, C
10、ode A for a minimum of 24 h, unless the test method indicates that standard conditioning is not required or that other conditions apply. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license fro
11、m IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW15757 Copyright 2013 General Motors Company All Rights Reserved December 2013 Page 2 of 10 3.1.4 Sampling. When multiple test specimens are required, they shall be taken diagonally across the sample so that no two test specimens overlap in the same row
12、 of yarns. Avoid taking specimens from damaged, contaminated, or defective areas caused by improper handling or manufacturing. Specimens should not be cut within 50 mm of any edge of the specimen. 3.1.5 Data Reporting. If all individual readings of a specific test meet or exceed the specified requir
13、ements, report the average. 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 test reporting data sheets (see A
14、ppendix A and/or Appendix B). 3.1.6 Visual Evaluation of Automotive Trim (GMW6992). The color, pattern, aesthetics and other related qualities shall be approved by the appropriate Engineering department as an acceptable match to the standard when viewed under conditions set forth in GMW6992. 3.1.7 D
15、eviations 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, report
16、s, etc. 3.1.8 Documentation. Specimens 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 ch
17、ange 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 t
18、he 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 depar
19、tment and the supplier. 3.2 Construction Requirements (Appendix A). 3.2.1 Weight (GMW3182). Test three specimens. Report the results in grams/square meter (g/m). Refer to Carpet Construction Certification Data Sheet in Appendix A for weight specification requirements. 3.2.2 Pile Height. Refer to the
20、 Carpet Construction Certification Data Sheet in Appendix A for pile height specifications. 3.2.3 Thickness (ISO 5084). Non-woven carpets only. Refer to Carpet Construction Certification Data Sheet in Appendix A. Report the average for three specimens in millimeters to the nearest 0.01 mm. Use a 4.0
21、 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 specimens shall be 100 mm x 100 mm size. 3.2.4 Breaking Load (GMW3010, Code A). Test six specimens; th
22、ree specimens from the Machine Direction (MD) and another three from the Cross Machine direction (CMD). Floor 310 N minimum 3.2.5 Trouser Tear Strength (ISO 13937-2). Test six specimens; three specimens from the MD and another three from the CMD. Electronic method of calculation shall be used. Floor
23、 50 N minimum 3.2.6 Resistance to Cracking from Bending at Cold Temperature (GMW14108). Cut four specimens approximately 250 mm x 250 mm. Oven age two specimens for 336 h at 93 C 2 C. Expose specimens face side down during the entire oven exposure. For “as-received” testing and after aging, conditio
24、n specimens for a minimum of 24 h to the requirements of GMW3221, Code A, before cold temperature exposure. Condition all four specimens at -30 C for a minimum of 4 h. One “as-received” specimen shall be wrapped around a 75 mm diameter mandrel so that the face side is in contact with the mandrel, th
25、en the backside. Follow the same procedure for both oven aged specimens. 3.2.6.1 There shall be no cracking or other deterioration of specimen on the backside. 3.2.7 Abrasion Resistance (GMW3208). Non-woven, low-weight floor carpets must be tested to GMW3208 Taber abrasion test using H18 wheel, 500
26、g load for 600 cycles. Three specimens per type shall be tested according to GMW3208. Rating of minimum 6 is required. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLD
27、WIDE ENGINEERING STANDARDS GMW15757 Copyright 2013 General Motors Company All Rights Reserved December 2013 Page 3 of 10 They also must have floor mats, heel pads, complete protection of the ingress/egress areas and protection of the transmission tunnel areas. 3.2.8 Stability of Materials Against Me
28、chanical Load (GMW14125). Non-woven carpets must meet Cycle BX2 with a rating 4. 3.2.9 Odor (GMW3205). Report both wet and dry results. Rating 6 is required. Use code A2, and B2 3.2.10 Mildew (GMW3259). Required only if natural fibers are present in the construction. There shall be no visible growth
29、 or odor of mildew. See Appendix A, Data Sheet A1 to determine if this is a requirement. 3.2.11 Fogging (GMW3235, Method B, Y1, T2). The condensable constituents value should be 2 mg. 3.2.12 Flammability (GMW3232). 3.2.12.1 After Conditioning (GMW3232). Immediately prior to tests, all test specimens
30、 shall be conditioned for a minimum of 24 h according to GMW3221, Code A. 3.2.12.2 After Aging. The test cycle shall commence with 48 h 1 h at +40 C 3 C and 95% 5% relative humidity, followed by 168 h 1 h at +90 C 3 C and completed without interruption. 3.2.13 Sound Transparency (GMW14128). If a car
31、pet is intended to be used as a speaker covering, it must meet this requirement. 3.3 Color Requirements (Appendix B). 3.3.1 Colorfastness to Artificial Light Xenon Arc Method. Xenon shall be performed and reported for information only. Any of the methods listed in Tables 1, 2 and 3 may be used. Note
32、: Natural weathering is the requirement for approval. Table 1: Xenon Arc Method (GMW14162, Cycle A) Application Requirement For Information Carpet (Floor) 320 kJ/m2 640 kJ/m2 Table 2: Xenon Arc Method (GMW14162, Cycle B) Application Requirement For Information Carpet (Floor) 14 MJ/m2 28 MJ/m2 Table
33、3: Xenon Arc Method (ISO 105 B06, Condition 5) Application Requirement For Information Carpet (Floor - Low UV) 112 kJ/m2 Not applicable Carpet (Floor- High UV) 451 kJ/m2 Not applicable UV = Ultraviolet 3.3.1.1 A rating of 4 is required using the gray scale (ISO 105-A02) for color change. A noticeabl
34、e value (lightness) and/or chroma (saturation) change with minimum hue change is acceptable. Evaluate specimens as specified in GMW6992. Reference polystyrene or blue wool is to be used to certify the Xenon arc apparatus. 3.3.2 Natural Weathering Exposure (GMW3417 U/G-TSTL-XX). Evaluation criteria s
35、hall be no greater than a noticeable value (lightness) and/or chroma (saturation) change with minimum hue change acceptable. Evaluate specimens as specified in GMW6992. Natural weathering is the requirement for Colorfastness to Light approval. GM is responsible for conducting the natural weathering
36、testing. Suppliers shall submit one A4 specimen of the color-approved material to the responsible engineer at the developing region. This specimen must be from the same lot of material that is visually approved by GM and shall be submitted along with the Copyright General Motors Company Provided by
37、IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW15757 Copyright 2013 General Motors Company All Rights Reserved December 2013 Page 4 of 10 color properties test sample submission pac
38、kage. The specimen shall be labeled “For Natural Weathering Test” and include the suppliers name, piece number, date and GM Finish Symbol and color number. GM will advise the supplier of compliance or lack or compliance to the requirement. (Reference Table 4.) Table 4: Natural Weathering Exposure Re
39、quirement (Solar Glass) Application Temperature (C) Requirement (TNR kL) Information Only Carpet (Floor-Low UV) 85 15 Carpet (Floor-High UV) 102 105 UV = Ultraviolet 3.3.3 Fiber Degradation (GMW3387). Perform fiber degradation before and after Xenon testing and natural weathering. A rating 8 is requ
40、ired. 3.3.4 Dye Migration (GMW14141). A rating 4 is required using the gray scale (ISO 105-A03) for staining. 3.3.5 Color Crock (ISO-105-A01). A rating 4 is required using the grey scale (ISO 105-A03) for staining. 3.3.6 Water Spotting/Colorfastness to Water (GMW14102). Specimen size shall be 400 mm
41、 x 400 mm. Amount of water used shall be 50 mL. No penetration through the carpet when applying the water. No staining, ringing, haptic change or shrinkage allowed. 3.3.7 Cleanability and Soil Resistance (GMW3402). Perform soiling and cleaning of all soiling agents listed, with the exception of Code
42、s E, L, M N and P. A rating 4 is required for each soil and cleaner. For the evaluations, use the gray scale ISO 105-A02 and/or ISO 105-A03. 3.3.8 Flammability (GMW3232). 3.3.8.1 After Conditioning. Immediately prior to tests, all test specimens shall be conditioned for a minimum of 24 h according t
43、o GMW3221, Code A. 3.3.8.2 After Aging. The test cycle shall commence with 48 h 1 h at +40 C 3 C and 95% 5% relative humidity, followed by 168 h 1 h at +90 C 3 C and completed without interruption. Repeat 3.3.8.1 before testing flammability. 3.3.9 Interior Emissions (GMW8081, Relative Emission). The
44、 relative emission shall be 1.0. 3.4 Laminate, Composite and Substrate Requirements (Formed Carpet). All carpet testing is to be done on molded floor composites or carpets with backings intended for production. See Appendix C. 3.4.1 Weight (GMW3182). Test three specimens. Report the results in grams
45、 per square meter (g/m). Refer to the Construction Specification Data Form (see Appendix A, Data Form A1) for weight specification requirements. 3.4.2 Thickness (ISO 5084). Non-woven carpets only. Refer to the Construction Specification Data Form (see Appendix A, Data Form A1). Report the average fo
46、r 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 specimens shall be 100 mm x 100 mm s
47、ize. 3.4.3 Trouser Tear Strength (ISO 13937-2). Test six specimens: three specimens from the MD and another three from the CMD. Electronic method of calculation shall be used. Floor 50 N minimum 3.4.4 Resistance to Cracking from Bending at Cold Temperature (GMW14108). Cut four specimens approximatel
48、y 250 mm x 250 mm. Oven age two specimens for 336 h at 93 C 2 C. Expose specimens face side down during the entire oven exposure. For “as received” testing and after aging, condition specimens for a minimum of 24 h to the requirements of GMW3221, Code A, before cold temperature exposure. Condition a
49、ll four specimens at -30 C for a minimum of 4 h. One “as received” specimen shall be wrapped around a 75 mm diameter mandrel so that the face side is in contact with the mandrel, then the backside. Follow the same procedure for both oven aged specimens. There shall be no cracking or other deterioration of specimen on the backside. Copyright General Motors Company Provided by IHS under license with General Motors Co
