1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW16650 Hot Stamp Foils Copyright 2011 General Motors Company All Rights Reserved October 2011 Originating Department: North American Engineering Standards Page 1 of 6 1 Scope 1.1 Material Description. This specification covers the performance
2、 requirements for hot stamp foils applied to painted or unpainted parts. Four classes of performance are established to cover the different requirements of first surface and second surface applications on interior or exterior parts. (See Table 1.) Foils generally consists of a thin carrier strip of
3、acetate, cellophane, or polyester film (depending on the application), a release coat, a color, or metallized coat, and a sizing coat (adhesive). When applied to parts, such products are sometimes called hot stamped coatings or finishes, or just “hot stamps”. Table 1: Hot Stamp Foils Performance Cla
4、sses Class Typical Application Basic Specification No. and Suffix Symbol Note 1 A1 Vehicle Interior: First surface (unprotected) GMWXXXXX (A1) A2 Vehicle Interior: Second surface (protected by glass or transparent plastic) GMWXXXXX (A2) E1 Vehicle Exterior: First surface (unprotected) GMWXXXXX (E1)
5、E2 Vehicle Exterior: Second surface (protected by glass or transparent plastic) GMWXXXXX (E2) Note 1: Suffix symbols shown indicate basic test requirements are applicable. 1.2 Other Suffix Symbols. 1.2.1 Suffix P: Perspiration Resistance (see 3.17). 1.2.2 Suffix T: Protective Tape (see 3.18). 1.3 Ty
6、pical Applications. Not applicable. 1.4 Remarks. No exterior first surface hot stamp foil, meeting the requirements of Class E1, has been found. Class E1 requirements can be used for future material development. 2 References Note: Only the latest approved standards are applicable unless otherwise sp
7、ecified. 2.1 External Standards/Specifications. ISO 7724-1 SAE J1885 SAE J1545 SAE J2527 SAE J1756 2.2 GM Standards/Specifications. 9984168 GMW14124 GM9531P GMW14334 GMW3059 GMW14445 GMW3116 GMW14700 GMW3208 GMW14729 GMW3221 GMW14873 GMW3417 GMW14892 Provided by IHSNot for ResaleNo reproduction or n
8、etworking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16650 Copyright 2011 General Motors Company All Rights Reserved October 2011 Page 2 of 6 2.3 Additional References. TMC003 Material Safety Data Sheet guidance documents (available at ). 3 Requirements 3.1 Sample P
9、reparation. 3.1.1 Unless otherwise specified, test panels shall be representative of production intent substrates and coatings. Second surface hot stamp foils shall be applied to the “B” surface of clear production intent substrate. First surface hot stamp foils shall be applied to the “A” surface o
10、f production intent substrate. For initial approval, all tests are required to be run. 3.1.2 Pre-test Conditioning. After application of the hot stamp to substrate, condition for at least 72 h at GMW3221, Code A conditions. 3.1.3 Post Environmental Exposure Conditioning. After environmental exposure
11、, all samples, unless otherwise specified, shall be conditioned for 4 h to GMW3221, Code A conditions prior to testing. 3.1.4 Test Conditions. Unless otherwise specified, the hot stamps shall be tested at GMW3221, Code A conditions. 3.2 Tape Adhesion. GMW14892 hot stamps bonded to a representative p
12、roduction substrate, prepared per 3.1, shall have a maximum rating of 1 after the environmental conditions in Table 2. Allow 1 h room temperature (RT) dwell before testing. Table 2: Environmental Conditions Environments 30 minutes RT aging 72 h RT aging Heat aging per 3.7 Thermally cycled per 3.8 Hu
13、midity exposure per 3.9 After Xenon per 3.12, or 3.13, 2500 kJ/m2 3.3 Appearance Durability. Samples prepared per 3.1 shall not show any surface deterioration, objectionable shrinkage, objectionable color or gloss change, delamination, edge lifting, cracking, visible adhesion loss, pitting, blisteri
14、ng, or any other degradation after exposure to any of the following tests. Heat Aging Thermal Cycling Humidity Florida Exposure Xenon Arc Exposure High Temperature Note: When accelerated test results and Florida exposure results are in disagreement, the exposure results shall overrule. Florida expos
15、ure samples may be washed with a mild detergent and water (ratio 5:95 by volume). 3.4 Abrasion Resistance. Test samples prepared per 3.1 shall show no loss of pattern (wear through clearcoating (if applicable), and subsequent color or metalized coating) when tested per GMW3208 with a 500 g load usin
16、g CS-17 abrading wheels for the following minimum number of cycles: Type A1 and E1 Minimum 300 cycles Type A2 and E2 Not applicable Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16650 Copyright 2011 General Mot
17、ors Company All Rights Reserved October 2011 Page 3 of 6 3.5 Chip Resistance GMW14700 Method B/Method C. Condition samples prepared per 3.1, and expose to the thermal cycle per 3.8. Run one pint of gravel (473 10 ml stones). For low chip areas, run at room temperature (Method C). The requirement is
18、a maximum stone chip diameter of 3 mm, or 5% maximum film removal. For high chip areas, run at -18 C (Method B). Same requirements as low chip areas. Contact Engineering for a definition of low chip and high chip areas. These areas can vary by vehicle design. Substrate will also have an effect on ch
19、ipping. 3.6 Cleaning Solvent Resistance (GMW14334-B). Prepare samples per 3.1. Samples shall exhibit no loss of adhesion, color or gloss change, and shall meet rating of 3. 3.7 Heat Aging. Samples prepared per 3.1 are oven aged at 168 h 80 C. 3.8 Thermal Cycling (GMW14124). Expose sample prepared pe
20、r 3.1 to one cycle of Cycle D (interior), or two cycles of Cycle C (exterior). Replace the low temperature of -30 C with -40 C in both cycles. 3.9 Humidity Resistance (GMW14729 Either Option A or B). Expose samples prepared per 3.1 for 168 h. 3.10 Florida Exterior Open Rack Direct Weathering Exposur
21、e (GMW14873). Separate samples prepared per 3.1 shall be subjected to 12, 24, 36, 48, and 60 months exposure at 5 degrees facing south in Florida. Gloss loss after 24 months Florida exposure shall be 20% (unpolished) and 10% (polished) maximum after 24 months, and 35% (unpolished) and 30% (polished)
22、 maximum after 60 months. There shall be no mildew/fungus growth observed after a minimum of 24 months Florida exposure. The following exposure times are optional and shall be called-out on the part drawing: 36 months 48 months 60 months 3.10.1 Visual Examination. Wash weathered specimens prior to m
23、aking measurements and observations. Wash with scrubbing action using a sponge that is saturated with a solution consisting of soap and deionized water at +23 3 C. Exposed parts shall not exhibit any indications of surface tackiness or embrittlement, change in hardness, blooming, blistering or other
24、 factors that might affect the function or appearance of the part. The color change shall not exceed a E of 3.0 units. The color change shall be measured per ISO 7724-1 or SAE J1545 (CIELAB color space, 10 degrees observer, metering orifice 10 mm, Illuminant D65, specular component included). Visual
25、 color change that is considered objectionable shall override the E measurement. The hot stamp must not exhibit objectionable color change. Note: Completion of Florida testing is not required for initial Engineering approval. The testing, however, shall be ongoing (with a minimum of 24 months Florid
26、a, and 4500 kJ/m2 Xenon exposures completed) before an approval is granted. 3.10.2 Natural Weathering Test Location Areas. Any of the following locations are considered equivalent as a test sample location. Obtain agreement from the regional GM Engineering group prior to sending test samples out for
27、 exposure. Miami or Southern Area, Florida, USA Jurez, Mexico Allunga, Queensland, Australia Cruz Alta, Brazil Okinawa, Japan 3.11 Interior Natural Weathering (GMW3417 L1, F2, G1, and T5). There shall be no surface tackiness, loss of adhesion, objectionable color, or gloss change, blooming, blisteri
28、ng, or other objectionable change in appearance. 3.12 Xenon Arc Weatherometer Exterior (SAE J2527) Extended UV Filter Combination. Samples prepared per 3.1 shall be exposed to 2500 kJ/m2 and 4500 kJ/m2 per SAE J2527 extended ultraviolet (UV) filters. Gloss loss after 2500 kJ/m2 is 15% (polished and
29、unpolished) maximum, and after 4500 kJ/m2 is 20% (polished and unpolished) maximum. See 3.10.1 for visual examination requirements. Run one sample to failure or 5500 kJ/m2. These requirements are for weatherometers supplied by Atlas. If weatherometers from other suppliers are used, correlation must
30、be demonstrated with long term open rack weathering results (see Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16650 Copyright 2011 General Motors Company All Rights Reserved October 2011 Page 4 of 6 3.10). Tes
31、t various constructions (clear and pigmented films) and various colors using good and poor weathering samples. 3.13 Xenon Arc Weatherometer Interior (SAE J1885). There shall be no objectionable surface deterioration, loss of adhesion, or objectionable color or gloss change after exposure at 340 nm i
32、n Xenon arc apparatus pdf SAE J1885 - Interior Cycle to 1240.8 kJ/m2. 3.14 High Temperature Resistance. Samples prepared per 3.1 shall be oven aged at 90 C for 1 h. 3.15 High Pressure Wand Car Wash Resistance (GM9531P Method “A“). Run on the paint system considered the most difficult to adhere to. (
33、Contact Materials Engineering for information on the system and where to purchase test panels.) Run test at room temperature. Testing at other temperatures (hot, cold) may be run at the discretion of Engineering. Do not make razor cuts in the test sample. Allow 72 h room temperature dwell between ap
34、plication and test. Increase spray duration to 30 s. Use a 1504, non-stabilized nozzle. There shall be no adhesion loss. 3.16 Fogging (SAE J1756) Photometric Procedure. Bath temperature of 95 C; cooling temperature of 38 C; test time; 16 h post conditioning time. The amount of fog when measured with
35、 a 60 degree gloss meter shall have a rating of 60 units or more. Samples that result in a residue that forms a transparent film, discernible droplets, or any visual signs of crystallinity shall be judged to have not passed this requirement. For most applications, bath temperature 95 C; for high tem
36、perature applications (top of instrument panel (I/P) or rear package shelf) bath temperature 102 C. 3.17 Perspiration Resistance (GMW14334 Code C). The surface finish must not show any objectionable staining or discoloration when in contact with both acid and alkaline synthetic perspirant solutions.
37、 Suffix P to be called out on the drawing. 3.18 Protective Tape Compatibility (9984168) (Applicable to A1 and E1). Production intent protective tape is applied to production intent substrate(s). After exposures, the samples are allowed to return to room temperature. The tape is removed and the sampl
38、es evaluated. There shall be no objectionable change in appearance of the hot stamp foil following the additional exposure: Seven days (168 hours) at 85 C in an air circulating oven for most applications, 102 C for high temperature applications. Suffix T to be called out on the drawing. 3.19 Sunscre
39、en and Insect Repellent Resistance (GMW14445). 3.20 All tests are required to be run for initial approval on production run number 1 and annual certification. 3.21 In addition, the full pigment library for inks (solid and metallic) with 24 months exposure in Florida (5 degrees facing south) shall al
40、so be reviewed. 3.22 See Table A1 in Appendix A for test conditions and requirements for each class of hot stamp foil. 4 Manufacturing Process Not applicable. 5 Rules and Regulations 5.1 Legal Regulations. All materials must satisfy applicable laws, rules, regulations and recommendations valid in th
41、e 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 requireme
42、nts 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 of manufacture, etc. If not otherwise agreed, all testing a
43、nd 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 and/or processes and to apply for a new release. If not o
44、therwise 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 department and the supplier. Provided by IHSNot for ResaleNo
45、 reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16650 Copyright 2011 General Motors Company All Rights Reserved October 2011 Page 5 of 6 5.4 Initial Source Approval. No shipments shall be made by any supplier until representative initial produ
46、ction samples have been approved by the appropriate Materials Engineering department(s) as meeting the requirements of this specification. 5.5 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 o
47、ccurred, a complete copy of the Material Safety Data Sheet/Safety Data Sheet must be submitted in 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 m
48、ust be in compliance with specific country General Motors TMC003 Material Safety Data Sheet/Safety Data Sheet guidance documents where available. 5.6 All materials supplied to this standard must comply with the requirements of GMW3059, Restricted and Reportable Substances for Parts. 5.7 Materials de
49、veloped to this specification shall be optimized to provide maximum end-of-life cycle value utilizing the Vehicle Recyclability/Recoverability Calculation Sheet. Recycled content shall be reported to the approving and procuring Materials Engineering Department utilizing the Part Recyclability/Recoverability Report Form. Reverence Appendix A of GMW3116, Recyclability, Recoverability Guidelin
