1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW16172 Paint Performance Requirements for New Plastic Materials Copyright 2012 General Motors Company All Rights Reserved February 2012 Originating Department: GME Specification Center Page 1 of 11 1 Scope This standard covers organic surface
2、 coatings on plastic parts and components used for exterior applications on motor vehicles, interior applications on motor vehicles, and also for painted components within the engine compartment. 1.1 Material Description. Not applicable. 1.2 Symbols. Not applicable. 1.3 Typical Applications. Not app
3、licable. 1.4 Remarks. This standard details the paint performance requirements for new plastic materials. 1.4.1 This material specification defines interior and exterior paint performance requirements of new plastics being considered for approval in the GM Approved Paint on Parts (APOPS) database. T
4、he purpose of this specification is to define the proof of paintability requirement listed in GMW3013 for a new plastic to be approved to MATSPC. 1.4.2 These tests are normally performed on plaques that were painted in a laboratory. Conformance to these requirements is the first step of the APOPS ap
5、proval process. (Additional steps include testing parts that were painted in production and monitoring quality during an extended production run. See GMW14797.) 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. AST
6、M D3763 ISO 2808 ISO/IEC 17025 SAE J2527 ISO 75 ISO 6603-2 SAE J1976 2.2 GM Standards/Specifications. 9984801 GMW14124 GMW14829 GMW16745 GMW3001 GMW14333 GMW14867 GMW16746 GMW3013 GMW14700 GMW15520 GMW3059 GMW14729 GMW15891 GMW3221 GMW14797 GMW15919 2.3 Additional References. TMC003 Material Safety
7、Data Sheet guidance documents (available at ). GM General Procedure GP-10 3 Requirements 3.1 Facilities. 3.1.1 If tests are performed outside of GM, all testing shall be performed in an accredited laboratory. Laboratory accreditations to ISO/IEC 17025 or to GM General Procedure GP-10 are acceptable.
8、 3.1.2 All testing is the responsibility of the resin supplier seeking GMW3013 approval to MATSPC. 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 STA
9、NDARDS GMW16172 Copyright 2012 General Motors Company All Rights Reserved February 2012 Page 2 of 11 3.2 Test Specimens. 3.2.1 Test specimens shall be painted test plaques, or with permission of GM Engineering, painted parts. Normally, laboratory molded plaques are used to provide a uniform substrat
10、e. Test plaque dimensions shall be 100 mm x 150 mm minimum x (3.2 0.2) mm. Other thicknesses may be substituted provided they are representative of intended part thickness. 3.2.2 With permission of GM Engineering, if painted production parts are used for this paintability testing, the results may al
11、so be used toward APOPS approval (pending the completion of the remaining GMW14797 requirements) only if the substrate, paints, and molding/painting process are the same as for production. 3.3 Control Plastic. 3.3.1 A control plastic material used shall be included in the test program. The control p
12、lastic shall be from the same generic family as the experimental plastic and be an old plastic. If such a control does not exist, GM Engineering will designate a control plastic. The control plastic shall be painted along with the experimental plastic. 3.4 Paint Materials. 3.4.1 All paint materials
13、used shall be old paint materials, unless testing is being coordinated with other requirements to gain approval to a 998 or GMW specification. Contact the appropriate GM Engineer to determine the proper adhesion promoters, primers, surfacers, and topcoats to use. Normally, both white (non-metallic)
14、and light metallic topcoats are applied for exterior and a light beige and a dark grey metallic hard touch paint for interior are applied, but specific situations may dictate otherwise. 3.4.2 Surfaces shall be cleaned prior to painting (9984801 power wash recommended for exterior). Paint materials s
15、hall be processed and cured using the normal conditions recommended in the suppliers product data literature. Normally, paint processing is done in a laboratory to fully control all processing conditions. 3.5 Test Conditions. Tests shall be conducted using the latest issue of the test methods indica
16、ted. Suitable precautions should be taken to ensure that applicable safe limits are not exceeded when conducting test procedures, processes and/or handling the materials required by this specification. Unless otherwise specified, painted samples shall be subjected to the testing after a minimum agin
17、g period of 72 h following the baking or drying cycle. Testing shall be conducted immediately following a conditioning period of 24 h minimum per GMW3221 Code A unless otherwise specified. All tests shall be run in triplicate. 3.6 Plaque Testing. Prepare panels per the requirements in paragraph 3 an
18、d perform testing as indicated in Table 1. 3.7 Test Report. The test report shall include paint processing data (use Data Sheet A1 in Appendix A) and paint performance test results (use Data Sheets A2, A3 or A4 in Appendix A). Along with these completed Data Sheets, submit the following: x Tested pl
19、aques x Paint thickness measurements x Paint supplier bake chart x Datapaq run when the plaques were painted x Multiaxial impact curves (if applicable) Table 1: Painted Plastic Performance Requirements Test Class GM Specification Requirements Note 1 Exterior Plastics Interior Plastics Underhood Plas
20、tics Tape Adhesion GMW14829 Maximum Rating of 1 X X X Adequacy of Cure Note 2 GMW15891 Maximum Rating of 0 for systems with clearcoat Maximum Rating of 1 for monocoats X X Adequacy of Cure Note 2 GMW14867, cure paragraph No paint film degradation when viewed at 10x magnification Note 3 X 72 h Humidi
21、ty followed by Tape Adhesion GMW14729 GMW14829 No appearance change Maximum Rating of 1 X X 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
22、GMW16172 Copyright 2012 General Motors Company All Rights Reserved February 2012 Page 3 of 11 Test Class GM Specification Requirements Note 1 Exterior Plastics Interior Plastics Underhood Plastics 96 h Humidity followed by Tape Adhesion GMW14729 GMW14829 No appearance change Maximum Rating of 1 X X
23、144 h Humidity followed by Tape Adhesion GMW14729 GMW14829 No appearance change Maximum Rating of 1 X X 240 h Humidity followed by Tape Adhesion GMW14729 GMW14829 No appearance change Maximum Rating of 1 X X X Chip Resistance GMW14700 (Method A or B and C) Minimum Rating of GM 9 X Heat Resistance No
24、te 4, Note 6 Exterior at +70 C; Interior at +85 C, +95 C, or +105 C Note 5 Underhood at +120 C +24 h Humidity +72 h Humidity +Tape Adhesion + Chip Resistance 168 h 168 h 168 h GMW14729 GMW14829 GMW14700-B No appearance change No appearance change No appearance change, DE 3.0 No appearance change Max
25、imum Rating 1 Minimum Rating of GM 9 X X X X X X X X X Mandrel Bend Flexibility At +23 C At -15 C At -30 C GMW16746, Suffix M2 Minimum Rating of 8. Flexible substrates only (800 MPa Flexural Modulus) X X X Gasoline Resistance - Dip GMW14333-A Rating 2. No color change or paint removal to previous su
26、rface or lifting or peeling of paint film. No appearance change. X X Gasoline Resistance-Immersion (TPO Substrates Only) GMW14333-B Max paint removal of 20% after 15 minutes immersion. Report results after 30, 45 and 60 minutes. X Moisture Cold Cycle A +24 h Humidity GMW14124 GMW14729 No appearance
27、change No appearance change X X X X + Tape Adhesion GMW14829 Maximum Rating of 1 X X Multiaxial Impact Note 7 Test at 2.2 m/s and at lowest temperature (0 C, -5 C, -10 C or -15 C) at which all ductile failures are observed ASTM D3763 All ductile failures X Multiaxial Impact, at 0 C Note 7 Speed: 4.4
28、 m/s Probe: 20 mm diameter Clamp: 40 mm diameter ISO 6603-2 Report results X Multiaxial Impact Note 8 Test at 6.6 m/s and -30 C. GMW15520 ASTM D3763 or ISO 6603-2 No more than 20% reduction in mean impact energy and sample break behavior must not change from ductile to brittle. X Water Jet (For fasc
29、ias only) GMW16745-B Max paint removal of 60 mm2 X Thermal Shock (For TPO Substrates Only) GMW15919 No removal X Paint Thickness Measurements Note 9 ISO 2808 Must meet standard paint thickness requirements as specified on part prints or per GM Materials Engineering X X X Copyright General Motors Com
30、pany Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16172 Copyright 2012 General Motors Company All Rights Reserved February 2012 Page 4 of 11 Test Class GM Specificatio
31、n Requirements Note 1 Exterior Plastics Interior Plastics Underhood Plastics Weather Resistance Note 10, Note 11 X Weathering + Appearance Visual inspection and gloss measurement Equal to control X Weathering + Tape Adhesion GMW14829 Maximum Rating of 1 X Weathering +96 h Humidity followed by Tape A
32、dhesion GMW14729 GMW14829 No appearance change Maximum Rating of 1 X Note 1: In addition to the test values indicated, there shall be no deleterious effects (such as, but not limited to color change, gloss change, chalking, crazing, and tackiness) following the exposure periods. Note 2: Perform this
33、 test first. If any samples fail, discard the entire sample set and prepare new test samples. Contact responsible GM engineer to determine required solvent. Note 3: Evaluation of the crock cloth is not required. Slight gloss increase of the paint film for low gloss (PGC) surfaces is acceptable. Exam
34、ples of degradation of the paint film include wrinkling, perforation or removal. Note 4: Not required for thermoset substrate. Note 5: The temperature shall be the highest of the 3 temperatures (+85 C, +95 C, +105 C) which is below the heat distortion temperature of the plastic material. The heat di
35、stortion temperature at 455 kPa shall be used. Heat distortion according to ISO 75 Method B. Note 6: For exterior only, after visual inspection, prior to performance testing, wash the painted surface with a 50:50 solution of isopropyl alcohol and water. Note 7: Multiaxial impact to be run on substra
36、tes intended for use on fascia systems. Test on plaques painted white and light metallic (single coats each of basecoat/clearcoat) and also white with 2 recoats. Note 8: MAI is for painted deployable surfaces only or at the program materials engineers request. Test only materials capable of ductile
37、break behavior at -30 qC. Note 9: For interior only: If Method 3B (shim) is not used and film build measurements are taken using microscopy (Method 5A), then film build samples should be taken from the flattest point farthest from an edge in the main appearance surface area. For grained samples,meas
38、ure 1 peak and 1 valley in a single location on a part and record each measurement and average. Repeat 3 times per part. Measure 1 part per color. Report all layers individually. Film build measurements should be per engineering drawing or, if not specified, (1.0 0.2) mm (25 5) Pm) for hard touch pa
39、ints or (2.0 0.2) mm (50 10) Pm for soft touch and semi-soft touch paints. Note 10: Wash painted surfaces according to SAE J1976 prior to performance testing. Do not polish. Note 11: Weather Resistance. Test to one (1) of the following: x SAE J1976-A, 12 months exposure in Miami, FL area x SAE J2527
40、-A, Extended Filter, 2500 kJ/m2 exposure to exterior Xenon arc Weatherometer 3.8 Provisions for Shipping. 3.8.1 Source Shipment Responsibility. It will be the responsibility of the supplier to ensure that the material is not exposed to temperatures during shipment which would cause the material to f
41、ail to meet any of the requirements of this specification. 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 the country of usage. 5.2 Language. In the event of conflict b
42、etween 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 and approved by the respo
43、nsible 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 and documentation normally required for initial release must
44、be completed. 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 GMW16172 Copyright 2012 General Motors Company All Rights Reserved February 20
45、12 Page 5 of 11 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 otherwise agreed, all release tests shall be repeated and d
46、ocumented 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. 5.4 Initial Source Approval. No shipments shall be made by any supplier until representat
47、ive initial production 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 exist
48、ing product has occurred, 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/
49、SDS submissions must 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. 6 Approved Sources Engineering qualifications of an approved source are required for this stand
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