1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW16877 Ultraviolet Curing, Sunscreen Lotion-Resistant Interior Paints and Coatings Copyright 2013 General Motors Company All Rights Reserved January 2013 Page 1 of 3 1 Scope Note: Nothing in this standard supercedes applicable laws and regula
2、tions. Note: In the event of conflict between the English and domestic language, the English language shall take precedence. This specification covers the requirements for water or solventborne, ultraviolet (UV), curable, sunscreen lotion-resistant interior paint systems. All paints approved to this
3、 specification shall be suitable for monocoats, basecoat/clearcoat or laser etch applications. All UV curable coating systems approved to the requirements of this specification must first pass the requirements of GMW14867. 1.1 Material Description. The paint system can be a 1, 2, or 3-layer coating
4、system. Each layer of each coating must be able to cure to the touch by UV radiation. There shall be two classes of materials. 1.1.1 Monocure Coatings. These coatings contain unsaturated acrylic resins that, when exposed to UV radiation, cure rapidly to yield high-quality coatings. 1.1.2 Dual Cure C
5、oatings. These coatings contain unsaturated acrylic resins along with hydroxyl and isocyanate (urethane)-containing resins. Initial cure to the touch is achieved by UV radiation, but a subsequent conventional or infrared (IR) curing oven is required to achieve the final urethane cure. 1.1.3 Paint Fe
6、el. Paint layer systems approved to this specification shall be required to carry a type suffix to indicate the haptic feel that it has to the human skin. The suffix system shall be as follows: Type A: Soft Touch Type B: Fabric Feel Type C: Hard Touch Type D: Semi-Soft Touch 1.2 Symbols. Paint layer
7、 systems approved to this specification shall be identified for application based on the following symbols with parentheses: (M): Monocoat (LE): Laser Etch (BC): Basecoat/Clearcoat 1.3 Typical Applications. Buttons, switches, heating, ventilation, air condition (HVAC) and radio faceplates for laser
8、etch applications; moldings, faceplates, etc., for basecoat/clearcoat applications. 1.4 Remarks. Not applicable. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. None 2.2 GM Standards/Specifications. GMW3059 GMW14
9、867 GMW3208 GMW15572 GMW3221 GMW15581 GMW3417 GMW16727 2.3 Additional References. TMC003 Material Safety Data Sheet guidance documents (available at ). 3 Requirements 3.1 Requirements on Test Specimens. All samples are to be conditioned prior to each required test according to GMW3221, Code A. 3.2 P
10、aint System Requirements. The paint system tested on the panels must be identical to the production-intent paint system. The minimum film builds of the paint systems to be tested shall be specified in writing by the paint supplier. 3.3 Paint Technology Approval. All paint technology approvals for th
11、is specification must pass the requirements of GMW14867. 3.4 Sample Preparation and Identification. The plastic substrates and paint system shall be identified per 3.4.1. and 3.4.2. 3.4.1 Substrates. Approved Polycarbonate (PC), (GMW16727), Polycarbonate Acrylonitrile Butadiene Styrene (PC-ABS) (GMW
12、15581), and 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 GMW16877 Copyright 2013 General Motors Company All Rights Reserved January 2013
13、Page 2 of 3 PC-Acrylic substrates for laser etch applications or approved PC, PC-ABS, and ABS, (GMW15572), for base/clear applications. Vendor Compound number 3.4.2 Paint System. Vendor Paint formulation Processing conditions, including all reduction parameters, surface preparation, flash and cure t
14、imes, and temperatures and dry film thickness for each film of paint applied. 3.5 Coating Combinations. All testing must be performed on the combination of paint layers intended for production. Some of the testing must be performed on laser etched areas of the panel in order to prove durability and
15、shall be specified in the required section. The MATSPC approval shall reflect which system was tested for approval. 3.6 Appearance. The finished coating layer system shall be smooth, uniform and continuous in appearance. 3.7 Laserability. Paint systems for laser etch applications must be proven to b
16、e laser etched without exhibiting any objectionable defects, i.e., yellowing of graphics, non-clarity of graphics. 3.8 Effects of Cleaners and Lotions. 3.8.1 Laser Etch Applications. Wedge painted test plates for this test shall be submitted. The test plates in the as-received condition shall be res
17、istant to sunscreen lotion and all cleaners when tested at the different paint layer interfaces of test plates when tested to GMW14867. 3.9 Wear Resistance. (GMW3208) The surface finish shall show no wear through the top paint layer or other adverse effects after 1000 cycles per nominal topcoat film
18、 build of 25 m dry film build of the abrader wear tester per GMW3208, CS-10 wheel with a 500 g load. 3.10 Color Approval. In addition, each topcoat color of an approved technology must be tested to the properties listed below using the test methods outlined in GMW14867. 3.10.1 Cure. See GMW14867. 3.
19、10.2 Adhesion. See GMW14867. 3.10.3 Effects of Cleaners and Lotions. See GMW14867. 3.10.4 Color Crock. See GMW14867. 3.10.5 Taber Abrasion. See GMW14867. 3.10.6 Mar Resistance. See GMW14867. 3.10.7 Xenon. See GMW14867. 3.10.8 Weathering. Plaques per GMW16727 shall be painted and exposed according to
20、 the following callout: GMW3417-L1-F2-G1-T6 for duration of 25000, 55 000 and 105 000 Langleys. No objectionable color or gloss change shall be acceptable. 4 Manufacturing Process All coatings approved to this specification must be applied and cured according to the submitted paint processing requir
21、ements per GMW14867. Any painted plastic parts which do not conform to the cure, film build or appearance requirements shall be cause for rejection. 5 Rules and Regulations 5.1 Legal Regulations. All materials must satisfy applicable laws, rules, regulations and recommendations valid in the country
22、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 thi
23、s 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 and documen
24、tation 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 otherwise a
25、greed, 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. 5.4 Material Safety Data Sheets/Safety Da
26、ta Sheets (MSDS/SDS). For new product submissions, or when a change in chemical composition of an existing 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 Copyright General Motors Company Pr
27、ovided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16877 Copyright 2013 General Motors Company All Rights Reserved January 2013 Page 3 of 3 of Classification and Labeling of C
28、hemicals (GHS) requirements or other country-specific MSDS/SDS requirements. In addition, product MSDS/SDS submissions must be in compliance with specific country General Motors TMC003 Material Safety Data Sheet/Safety Data Sheet guidance documents where available. 5.5 All materials supplied to this
29、 standard must comply with the requirements of GMW3059, Restricted and Reportable Substances for Parts. 6 Approved Sources Materials supplied to this specification must be approved by General Motors. A list of approved materials can be found in MATSPC. This GM Material File is provided to third part
30、ies to reduce redundant testing of materials. If approved material already listed is used, the part supplier can use GM Material File reference for Production Part Approval Process (PPAP) material approval. If the decision is made to use a not yet approved material, contact GM Materials Engineering
31、for details on the approval process. The material approval process must be completed prior to PPAP start date of the part supplied to General Motors. For other GM locations, the responsible engineering group should be contacted to obtain the approved source in that individual country. 7 Notes 7.1 Gl
32、ossary. MATSPC: Global repository of GM Approved Materials for corresponding GM Engineering Standards. 7.2 Acronyms, Abbreviations, and Symbols. ABS Acrylonitrile Butadiene Styrene (BC ) Basecoat/Clearcoat GHS Globally Harmonized System of Classification and Labeling of Chemicals GSSLT Global Subsys
33、tem Leadership Team HVAC Heating, Ventilation, Air Conditioning IR Infrared (LE) Laser Etch (M) Monocoat MSDS Material Safety Data Sheet PC Polycarbonate PC-ABS Polycarbonate Acrylonitrile Butadiene Styrene PPAP Production Part Approval Process SDS Safety Data Sheet UV Ultraviolet 8 Coding System Th
34、is standard shall be referenced in other documents, drawings, etc., as follows: Material per GMW16877 Type X (YZ). Where: X indicates type per Paragraph 1.1.2, and (YZ) indicates application per Paragraph 1.2 9 Release and Revisions This standard was originated in October 2012. It was first approved
35、 by the Finishes & Coatings Global Subsystem Leadership Team (GSSLT) in January 2013. It was first published in January 2013. Issue Publication Date Description (Organization) 1 JAN 2013 Initial publication. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
