GMW-14553-2006.pdf

WORLDWIDE ENGINEERING STANDARDS Material Specification Textiles GMW14553 Security Shade Fabric © Copyright 2006 General Motors Corporation All Rights Reserved July 2006 Originating Department: North American Engineering Standards Page 1 of 18 1 Scope 1.1 Material Description. This specification describes fabrics used in rear cargo or window areas. Fabrics covered by this specification are made from fibrous textile materials that are knit or woven in structure. 1.2 Symbols. A unique finish symbol will be given to each fabric by the responsible GM representative at initial development. 1.3 Typical Applications. Type I material is used for cargo security shade applications. Type II is typically a mesh fabric construction and is used in side, back or sunroof window openings to reduce the amount of light penetrating the vehicle without obstructing driver vision. Note: If no type is specified assume Type I. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. ISO 105-A02 ISO 5084 ISO 105-A03 ISO 9050 ISO 105-B06 ISO 13937-2 ISO 105-X12 ISO/IEC 17025 2.2 GM Standards/Specifications. GMW3001 GMW3402 GMW3010 GMW3417 GMW3059 GMW6992 GMW3116 GMW8081 GMW3182 GMW14102 GMW3205 GMW14124 GMW3208 GMW14126 GMW3221 GMW14132 GMW3232 GMW14141 GMW3235 GMW14162 GMW3259 3 Requirements 3.1 General Requirements. 3.1.1 Standard Conditions (GMW3221-A). All test specimens shall be conditioned to GMW3221 Code A, unless the test method indicates that standard conditioning is not required. If specimens are tested outside of the conditioned environment, they shall be tested within 10 minutes of removal. 3.1.2 Sampling and Test Specimen Preparation. All test specimens shall be taken from the area beyond the initial 2 m of production and at least 50 mm from either selvage edge. Prepare test specimen as required in the respective test method. 3.1.3 Visual Evaluation of Automotive Trim (GMW6992). The color, pattern, aesthetics and other related qualities shall be evaluated and approved by the responsible engineering department as an acceptable match to the engineering approval sample when viewed under conditions set forth in GMW6992. 3.1.4 Deviation from Defined Test Methods. Deviations from the conditions of any test method shall be agreed upon between supplier and vehicle manufacturer. All deviations shall be specified on the component drawings, material specifications, and Statement of Requirements and shall be indicated as such on test certificates and reports. 3.1.5 Certification of Test Data. Lab testing is to be performed by a laboratory that conforms* to ISO/IEC 17025 or is acceptable to the customer (GM). Supplier shall submit a letter of compliance. *Meets requirements, may not be formally recognized by a third party. 3.1.6 Test Report Forms. Test reports must conform to Sections 5.10.2 and 5.10.3 of ISO/IEC 17025. Use of attached forms, Appendices A and B, meets this requirement. 3.1.7 Material Construction Specification. All required information shall be reported on the construction specification form, Appendix C. Not applicable items on form must be filled in with “n/a”. Established values for a construction will be reported on and controlled within the limits established on the construction specification form. GMW14553 GM WORLDWIDE ENGINEERING STANDARDS © Copyright 2006 General Motors Corporation All Rights Reserved Page 2 of 18 July 2006 3.2 Construction Requirements. These requirements describe the initial testing to be completed for a new fabric construction. Report the data per Appendix A. For complete construction approval, section 3.3 must also be completed using a representative color. Report the data per Appendix B. Test specimens shall be submitted where indicated on appendices. 3.2.1 Weight (GMW3182). Report the average of 3 specimens in g/m2 to the nearest 0.1 g/m2. Acceptable production tolerances shall be ± 6 % unless otherwise specified on the construction specification form. 3.2.2 Thickness (ISO 5084). Report the average thicknesses for three specimens, in mm to the nearest 0.01 mm. Use a 2.0 N load and a 50.5 mm diameter pressure foot to achieve a pressure of 1.0 kPa. All readings should be taken after the pressure foot has been in contact with the material for at least 5 seconds. Acceptable production tolerance shall be ± 10 % unless otherwise specified on the construction specification form. 3.2.3 Resistance to Blocking (GMW14132). For Type II material only. There shall be no blocking or surface marring when specimen pairs are placed face-to-face and face-to-back. Use a 3600 g mass. A total of six 50 by 50 mm specimen pairs are needed for each test condition below. 3.2.3.1 As Received. Test three specimen pairs face to face and three specimen pairs face to back. 3.2.3.2 After Humidity. Test three specimen pairs face to face and three specimen pairs face to back. All specimen pairs shall be tested after 24 h pre conditioning at 38 ± 2°C and 95 ± 3 % R.H. Test within 10 minutes of removal from humidity. 3.2.3.3 After High Temperature. Test three specimen pairs face to face. Test another three specimen pairs face to back. All specimens shall be tested after 24 ± 0.5 h aging at 100 ± 2°C in a mechanical convection oven. 3.2.4 Cold Crack (GMW14126). Test two specimens from the Machine Direction (MD) and two specimens from the Cross Machine Direction (CMD). H=150 mm, G=500 g. Evaluate the face side of specimens by flexing at the point of impact. There shall be no cracking or crazing of the finish or fibers when evaluated with the trained naked eye. 3.2.5 Dimensional Stability (GMW14124, Cycle M performed twice). Report the dimensional change after each condition of the cycle. There shall be no greater than 2.5 % dimensional changes in either the MD or CMD. The material must withstand the environmental exposure with no objectionable visual appearance changes. Visual observations shall include changes in color or gloss, warping, wrinkling, sag, staining, haptic, or other undesirable changes. High temperature is to be 110°C. 3.2.6 Resistance to Wear (GMW3208). Test three specimens using 500 g weights and H-38 wheels for 300 cycles. A rating of 6 or greater is required. 3.2.7 Resistance to Mildew (GMW3259). This test is required whenever a new fiber, finishing agent, resin, back coating, or combination thereof is introduced. Tested fabric shall have no visible growth of mildew and no objectionable odor. 3.2.8 Resistance to Odor (GMW3205). This test is required whenever a new fiber, finishing agent, resin, back coating, or combination thereof is introduced. Tested fabric shall have a rating of 6 or higher. Use a test specimen of 3 + 0.05 g with a desiccator of 2700 cm3 volume (2.7 liters). 3.2.9 Light Transmissivity (ISO 9050). Type II material only. Test the material per section 3.3 and report the v and the instrument used to obtain the data. This information will be used to characterize the material for appropriate usage. v is the amount of light not blocked by the fabric. 3.2.10 Tensile Strength and Elongation (GMW3010 Code A). Established values for a construction will be reported on and controlled within the limits established on the Construction Specification Form. The minimum tensile requirement at break is 350 N as received. Record and maintain elongation at 44 N as specified on the Construction Specification Form. In addition, report elongation at 25 N, 50 N, 100 N, and at break; or include a force-elongation chart for information only. 3.2.11 Trouser Tear Strength (ISO 13937-2). Established values for a construction will be reported on and controlled within the limits established on the Construction Specification form using the manual calculation method. Test three specimens from both the MD and the CMD; consider the short direction of the test specimen the direction of test per Figure 1 below. Report the average for each direction in N. The minimum tear strength shall be 36 N. Manual calculation method is preferred. GM WORLDWIDE ENGINEERING STANDARDS GMW14553 © Copyright 2006 General Motors Corporation All Rights Reserved July 2006 Page 3 of 18 Breaking fibers = test direction Breaking fibers = test direction Figure 1: Trouser Tear (per 3.2.11) 3.2.11.1 Trouser Tear after Xenon (ISO 13937-2). After exposure per 3.3.1, the average tear strength must not be reduced by more than 25% of the as received condition. See Figure 2 below for illustration of sample position for xenon exposure. Figure 2: Trouser Tear after Xenon (per 3.2.11.1) 3.3 Color Properties. These requirements describe the testing to be completed with each new color being considered for an approved construction. Report data per Appendix B. Test specimens shall be submitted where indicated on Appendix B. 3.3.1 Colorfastness to Artificial Light. The procedure and requirement will be defined on the Construction Specification Sheet or by approving region. A noticeable value (lightness) and/or chroma (saturation) change with minimum hue change is acceptable. The evaluation criterion for noticeable value change is a rating of 4 or better per the ISO 105-A02 Grey Scale for Color Change. Evaluate specimens per conditions set forth in GMW6992. Table 1: Type I and Unspecified Fabrics. Type 1 Xenon Method Requirement For Information 3.3.1.1 ISO105-B06 Condition 5 451.2 kJ/m2 225.6 kJ/m2 3.3.1.2 GMW14162A 987.0 kJ/m2 493.5 kJ/m2 3.3.1.3 GMW14162B 28.0 MJ 14.0 MJ Table 2: Type II Fabric. Type 2 Xenon Method Requirement For Information 3.3.1.5ISO105-B06 Condition 5 1240.8 kJ/m2 789.6 kJ/m2 3.3.1.6GMW14162 A 2714.3 kJ/m2 1727.3 kJ/m2 3.3.1.7GMW14162B 42.0 MJ 28.0 MJ 3.3.2 Natural Weathering (GMW3417). At the discretion of the GM engineer, new constructions, colors or applications may be sent for Weathering Exposure Test for Interior Trims. Table 3: Natural Weathering. Temp °C Requirement For Information Only 102 105 TNR kL 60, 80, and 90 TNR kL Expose To Xenon Hide Behind Card Evaluation criteria shall be no greater than a noticeable value (lightness) and or chroma (saturation) change with minimum hue change. Evaluate specimens per the condition set forth in GMW6992. 3.3.3 Color Crocking (ISO 105-X12). The results shall be 4 when compared to the ISO 105-A03 Grey Scale for Staining of sample cloth. Perform ten strokes for both wet and dry. 3.3.4 Dye Migration (GMW14141). The rating must be 4 when evaluated using the ISO 105- A02 Grey Scale for Color Change. 3.3.5 Water Spotting (GMW14102). Specimen size shall be 200 mm x 200 mm. Amount of water used shall be 1.5 ml. No staining, ring formation, or haptic change is allowed. If the water wicks to any edge of the specimen increase the specimen size. 3.3.6 Soil and Cleaner Resistance (GMW3402 A the minimum acceptable rating is 4. 3.3.7 Fogging (GMW3235, Code A Photometric). Report the average fog number for three specimens. A reflectance value of 90 minimum with either a dry uniform or dry non-uniform film is required. Specimens that form crystals, an oily film, or discernable droplets 0.05 mm in diameter at 40X magnification do not meet this requirement. The bath temperature is to be 95°C for Type I, or 110°C for Type II. GMW14553 GM WORLDWIDE ENGINEERING STANDARDS © Copyright 2006 General Motors Corporation All Rights Reserved Page 4 of 18 July 2006 3.3.8 Flammability (GMW3232). For initial approval and routine quality control see sections 6.1.1.1 and 6.1.1.2 of GMW3232. 3.3.8.1 After Conditioning (GMW3232). Immediately prior to tests all test specimens shall be conditioned for a minimum of 24 h according to GMW3221-A. 3.3.8.2 After Aging (GMW3232). In addition to tests conducted in the as received condition, all materials shall additionally be tested for flammability after the following artificial condition: The test cycle shall commence with 48 ± 1 h at 40 ± 3°C and 93 ± 5 % relative humidity followed by 168 ± 1 h at 90 ± 3°C and completed without interruption. Repeat 3.3.9.1 before testing flammability. 3.3.9 Interior Emissions (GMW8081). The relative emission shall be 25% of 3.2.11)(MD) N: Per Construction: (25% of 3.2.11)(CMD) N: Measurement Calculation Method:Manual Electronic Per Construction: See Initial Construction Specification Form for expected value. (Record Expected Value)* Specimens to be submitted with lab data. Date: SECURITY / SUN SHADE CONSTRUCTION CERTIFICATION DATA FORM ID IDSupplier: Authorized Signature: Date: TYPEDoes NOT Meet GM WORLDWIDE ENGINEERING STANDARDS GMW14553 © Copyright 2006 General Motors Corporation All Rights Reserved July 2006 Page 7 of 18 Data Form A3: Construction Certification GM Finish Symbol: Lab:GM color: Lab Report #:Request Number: Material Type: 3.2.3.1 Date: Date: Authorized Signature: ID SECURITY / SUN SHADE CONSTRUCTION CERTIFICATION DATA FORM Supplier: ID Notes Resistance to Blocking As Received Face to Face Resistance to Blocking As Received Back to Face Resistance to Blocking As Received Face to Face Resistance to Blocking As Received Back to Face Resistance to Blocking As Received Face to Face Resistance to Blocking As Received Back to Face GMW14553 GM WORLDWIDE ENGINEERING STANDARDS © Copyright 2006 General Motors Corporation All Rights Reserved Page 8 of 18 July 2006 Data Form A4: Construction Certification GM Finish Symbol: Lab:GM color: Lab Report #:Request Number: Material Type: 3.2.3.2 Date: Date: Authorized Signature: ID SECURITY / SUN SHADE CONSTRUCTION CERTIFICATION DATA FORM Supplier: ID Notes Resistance to Blocking After Humidity Face to Face Resistance to Blocking After Humidity Back to Face Resistance to Blocking After Humidity Face to Face Resistance to Blocking After Humidity Back to Face Resistance to Blocking After Humidity Face to Face Resistance to Blocking After Humidity Back to Face GM WORLDWIDE ENGINEERING STANDARDS GMW14553 © Copyright 2006 General Motors Corporation All Rights Reserved July 2006 Page 9 of 18 Data Form A5: Construction Certification GM Finish Symbol: Lab:GM color: Lab Report #:Request Number: Material Type: 3.2.3.3 Date: ID SECURITY / SUN SHADE CONSTRUCTION CERTIFICATION DATA FORM Supplier: ID Date: Authorized Signature: Notes Resistance to Blocking After High Tempurature Face to Face Resistance to Blocking After High Tempurature Back to Face Resistance to Blocking After High Tempurature Face to Face Resistance to Blocking After High Tempurature Back to Face Resistance to Blocking After High Tempurature Face to Face Resistance to Blocking After High Tempurature Back to Face GMW14553 GM WORLDWIDE ENGINEERING STANDARDS © Copyright 2006 General Motors Corporation All Rights Reserved Page 10 of 18 July 2006 Data Form A6: Construction Certification GM Finish Symbol: Lab:GM color: Lab Report #:Request Number: Material Type: 3.2.43.2.5 Date: ID SECURITY / SUN SHADE CONSTRUCTION