1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW16596 Heel Pad - Floor Applications Copyright 2012 General Motors Company All Rights Reserved February 2012 Originating Department: North American Engineering Standards Page 1 of 9 1 Scope This specification describes carpet materials that a
2、re suitable for use as heel pads attached to floor carpeting. 1.1 Material Description. The material shall be constructed using polyvinyl chloride or thermoplastic polyolefin polymers compounded for wear resistance and adhesion compatibility to carpet pile. The material shall be integrally colored.
3、1.2 Symbols. This code defines the material construction and will be assigned by the responsible department: WP-HPWP-P 1.3 Typical Applications. Suitable for heel pads attached to floor carpeting. 1.4 Remarks. For requirements for vehicles without solar absorbing glass, contact the appropriate Mater
4、ials Engineer. All interior materials are developed to be used in vehicles with solar glass; therefore, 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/Specific
5、ations. ISO 34-1 ISO 527 ISO 105-A02 ISO 868 ISO 105-A03 ISO 5084 ISO 105-B06 ISO/IEC 17025 ISO 105-X12 2.2 GM Standards/Specifications. GMW3059 GMW3402 GMW3116 GMW3417 GMW3182 GMW6992 GMW3205 GMW8081 GMW3208 GMW14162 GMW3221 GMW14444 GMW3232 GMW14864 GMW3235 GMW15634 2.3 Additional References. TMC0
6、03 Material Safety Data Sheet guidance documents (available at ). 3 Requirements 3.1 Requirements on Test Specimens. Reference GMW3221. 3.1.1 General Requirements. 3.1.1.1 Test Date. Lab testing is to be performed by a laboratory that conforms to ISO/IEC 17025 and is acceptable to the customer (Gene
7、ral Motors). Note: “Conforms” means that the laboratory meets requirements, although it may not be formally recognized by a third party. 3.1.2 Material Construction Specification. All required information shall be reported on the Construction Certification Form. A form shall be submitted along with
8、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 specimens shall be conditioned
9、 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 tested parallel and perpendicular to machine direction to determine true mini
10、mum and maximum values for conformance to requirements of this specification. 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 sample. 3.1.5 Data Reporting. If all individua
11、l readings of a specific test meet or exceed the specified requirements, report the average. Unless otherwise stated, any individual reading outside the specified limit does not meet the requirement. All Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot fo
12、r ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16596 Copyright 2012 General Motors Company All Rights Reserved February 2012 Page 2 of 9 required information shall be reported on the appropriate test data form. 3.1.6 Visual Evaluati
13、on of Automotive Trim. 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 Deviations from Defined Test Methods. Deviations from the cond
14、itions of any test method shall have been agreed upon between supplier and General Motors. All deviations shall be specified on the component drawings, material specifications, etc. and shall be indicated on test certificates, reports, etc. 3.1.8 Documentation. Samples of components or material rele
15、ased to this standard shall be tested for conformity with the requirements of this specification and approved by the responsible GM Engineer prior to the start of delivery of production level components or materials. Any change to the component or material, e.g., design, function, properties, manufa
16、cturing 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 or modification to the product/process, and to apply for a new release. Unless otherwise agreed t
17、he 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 Engineer and the supplier. Reference GMW3221. 3.2 Construction Requirements. 3.2.1 Weig
18、ht (GMW3182). Test three specimens. Report the results in g/m. Refer to the Construction Specification Data Form for weight specification requirements. 3.2.2 Thickness (ISO 5084). Refer to the construction form. Report the average for three specimens in millimeters to the nearest 0.01 mm. Use a 50 m
19、m diameter presser foot to achieve a pressure of 1.0 kPa. All readings should be taken after the presser foot has been in contact with the material for at least 5 s. The specimen size shall be 100 x 100 mm size. 3.2.3 Tensile Stress at Break (ISO 527, Type 1A Dumbbell, 500 mm/minute). Test three spe
20、cimens for each direction (Flow and Cross Flow direction) and report the average. The minimum value shall be 12 N/mm2 for Flow Direction, and 10 N/mm2 for Cross Flow direction. 3.2.4 Elongation at Break (ISO 527, Type 1A Dumbbell, 500 mm/minute). Test three specimens for each direction (Flow and Cro
21、ss Flow direction) and report the average. The minimum value shall be 250%. 3.2.5 Tear Strength (ISO 34-1, Method B, 50 mm/minute). Test three specimens for each direction (Flow and Cross Flow direction) and report the average. The minimum value shall be 65 N/mm. 3.2.6 Hardness, Shore A (ISO 868, 15
22、 s Delay). Test three specimens and report the average. The minimum value shall be 80 5 points. 3.2.7 Fogging (GMW3235, Method A or Method B). The temperature for this method should be 90 C. 3.2.7.1 Photometric Method, Code A. Report the average fog number for three specimens. A Reflectance value of
23、 90 minimum with either a dry uniform or dry non-uniform film is required. Specimens that form crystals, an oily film, or discernible droplets 0.05 mm in diameter at 40X magnification do not meet this requirement. 3.2.7.2 Gravimetric Method, Code B. Report the average weight of the condensable const
24、ituents for three specimens. Requirement is 1.0 mg. Specimens that form crystals, an oily film, or discernible droplets 0.05 mm in diameter at 40X magnification do not meet this requirement. 3.2.8 Flammability (GMW3232). 3.2.8.1 After Conditioning (GMW3232). Immediately prior to tests all test speci
25、mens shall be conditioned for a minimum of 24 h according to GMW3221 Code A. 3.2.8.2 After Aging (GMW3232). The test cycle shall commence with 48 1 h at +40 3 C and 95 5% relative humidity, followed by 168 1 h at +90 3 C and completed without interruption. Repeat conditioning before testing Flammabi
26、lity 3.2.9 Interior Emissions (GMW8081 Relative Emission or GMW15634). The relative emission shall be 1.0 for GMW8081, and Volatile Organic Compound (VOC) 600 g/gram, Semi-volatile Organic Compound (SVOC), 1000 g/gram for GMW15634. 3.2.10 Odor (GMW3205). Report both wet and dry results. A rating of
27、6 is required. Use a ratio of specimen size to container volume of 1:50. 3.3 Color Property Requirements. These requirements describe the testing to be completed for each color once the initial construction has Copyright General Motors Company Provided by IHS under license with General Motors Compan
28、yNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16596 Copyright 2012 General Motors Company All Rights Reserved February 2012 Page 3 of 9 been approved. The testing may be done on a carpet material or on a carpet composite fol
29、lowing the initial construction approval. All construction requirements are expected to match the initial construction approval even though these properties are not all retested for each color. 3.3.1 Colorfastness to Artificial Light. There shall be no more than a noticeable on tone change in color
30、finish (brightness or dullness) and no plasticizer migration, loss of grain, noticeable wrinkling or any other surface defects after exposure. Table 1: Xenon Arc Method (GMW14162, Cycle A) Application Requirement For Information Heel Pad 320 kJ/m2 640 kJ/m2 Table 2: Xenon Arc Method (GMW14162, Cycle
31、 B) Application Requirement For Information Heel Pad 14 MJ/m2 28 MJ/m2 Table 3: Xenon Arc Method (ISO 105 B06 Condition 5) Application Requirement For Information Heel Pad 112 kJ/m2 Not applicable 3.3.2 Natural Weathering Exposure (GMW3417 U/G-TSTL-XX). Evaluation criteria shall be no greater than a
32、 noticeable value (lightness) and or chroma (saturation) change with minimum hue change. The samples shall be exposed to 15 000 langleys (unit for solar radiation = grams calorie/cm2 of irradiated surface) at 85 C under absorbing glass conditions. Evaluate specimens as specified in GMW6992. Natural
33、weathering is the requirement for Colorfastness to Light approval. GM is responsible for conducting the natural weathering 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 m
34、aterial that is visually approved by GM and shall be submitted along with the color properties test specimen submission package. 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 su
35、pplier of compliance or lack of compliance to the requirement. 3.3.3 Resistance to Sulfur Ion Staining (GMW14864). There shall be no yellowing or shade alteration after the following exposure: Sulfide for 10 s Sulfur dioxide for 25 minutes 3.3.4 Flammability (GMW3232). 3.3.4.1 After Conditioning (GM
36、W3232). Immediately prior to tests, all test specimens shall be conditioned for a minimum of 24 h according to GMW3221 Code A. 3.3.4.2 After Aging (GMW3232). The test cycle shall commence with 48 1 h at +40 3 C and 95 5% relative humidity, followed by 168 1 h at +90 3 C and completed without interru
37、ption. Repeat conditioning before testing flammability 3.4 Carpet Assembly Properties. Representative samples taken from carpet assemblies must conform to the following requirements: 3.4.1 Physical Property Requirements. 3.4.1.1 Abrasion Resistance (GMW3208). Three specimens per type shall be tested
38、 according to GMW3208. Heel pad materials must meet 500 cycles of wear, using CS10 wheels and 500 g load. The rating shall be 6 minimum. 3.4.1.2 Cold Flexibility. A 25 mm wide piece of heel pad must withstand a quick 180 flex around a 12.5 mm diameter mandrel at -20 C with no evidence of cracking. 3
39、.4.1.3 Adhesion of Heel Pad to Carpet. Edge bond lines minimum 3500 N/m Center bond lines minimum 1750 N/m 3.4.1.3.1 Samples 75 mm wide are cut from across the full width of the heel pad, including carpeting, perpendicular to either the edge bond and/or the center bond lines. Each sample is conditio
40、ned to one of the following prior to further cutting: No conditioning, test as received. Water immersion exposure for 16 h (peel wet). Heat aging, 72 h at 80 C in air circulating oven (peel after returning to room temperature). 3.4.1.3.2 After conditioning each sample, cut it lengthwise 25 mm from e
41、ach edge through the heel pad only. 3.4.1.3.3 A cut is made in the middle of the center 25 mm strip perpendicular to the previous cuts only through heel pad. 3.4.1.3.4 The heel pad is peeled from the carpet in both directions from the cut in the middle of the 25 mm center strip at the rate of 300 mm
42、/minute (see Figure 1). 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 GMW16596 Copyright 2012 General Motors Company All Rights Reserved F
43、ebruary 2012 Page 4 of 9 Figure 1: Adhesion of Heel Pad to Carpet 3.4.1.4 Flammability (GMW3232). 3.4.1.4.1 After Conditioning (GMW3232). Immediately prior to tests, all test specimens shall be conditioned for a minimum of 24 h according to GMW3221 Code A. 3.4.1.4.2 After Aging (GMW3232). The test c
44、ycle shall commence with 48 1 h at +40 3 C and 95 5% relative humidity, followed by 168 1 h at +90 3 C and completed without interruption. Repeat conditioning before testing flammability 3.4.2 Carpet Assembly Color Property Requirements. 3.4.2.1 Color Crock (ISO 105-X12). The results shall be 3 or g
45、reater when compared to the American Association of Textile Chemists and Colorists (AATCC) Grey Scale. 3.4.2.2 Staining There shall be no migration staining of either carpet or heel pad following exposure in an air-circulating oven for 72 h at 70 C. 3.4.2.3 Cleanability and Soil Resistance (GMW3402)
46、. Perform soiling and cleaning of all soiling agents listed under Section 4 Procedure with the exception of Codes E, L, M, N and P. A rating 4 is required for each soil and cleaner. For the evaluation, use the gray scale (ISO 105-A02 and/or ISO 105-A03). 4 Manufacturing Process 4.1 Manufacturers Ide
47、ntification. Not applicable. 4.2 Part Performance Processability. All materials covered by this specification are subject Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WO
48、RLDWIDE ENGINEERING STANDARDS GMW16596 Copyright 2012 General Motors Company All Rights Reserved February 2012 Page 5 of 9 to part performance testing through part validation, accordingly to GMW14444. 5 Rules and Regulations 5.1 Legal Regulations. All materials must satisfy applicable laws, rules, r
49、egulations 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 specification shall be tested for conformity with the requirements of this material specification
