《GMNA-9984286-1997.pdf》由会员分享，可在线阅读，更多相关《GMNA-9984286-1997.pdf（2页珍藏版）》请在三一文库上搜索。
1、I GENERAL MOTORS ENGINEERING STANDARDS I Materials and Processes - Paint I EXTERIOR DECORATIVE SECOND SURFACE FINISHES ON PLASTIC PARTS 9984288 1 SCOPE. This specification covers the basic require- ments for decorative coatings used on the second surface of exterior acrylic or polycarbonate plastic
2、parts. Because these coatings are intended for the decoration of the part when viewed from the front side, they may be opaque or translucent and may or may not be used in combination with vacuum met- alizcd surfaces. 1,l These coatings are part of a total lighting product system and must meet the re
3、quirements set forth in this specification and those shown on engineering drawings. This specification shall be used in conjunction with the Approved Paint on Plastics Systems (APGPS), a section of Materials Specification File (MATSPC) which lists approved substrate, cleaning, prim- ing, and topcoat
4、 combinations, 2 REFERENCED STANDARDS. GMlOOOM GM9 12SP GM446SP GM9136P GM907 1P GM9504P GM9SOSP 3 REQUIREMENTS. 3.1 RESTRICTED AND REPORTABLE CHEMICALS (GMlOOOM). All materials supplied to this specification must comply with the requirements listed in GMlOOOM, Restricted and Reportable Chemicals. 3
5、.2 SURFACE PREPARATION. The substrate surface must be clean and free from surface defects. 3.3 APPLICATION. Reduce and apply uniformly to achieve dry film thickness per supplier recommendations. 3.4 CURE. Surface of the part must be within the range of time and temperature agreed upon by the supplie
6、r and the pro- cessor. Time in oven and ambient temperature must be regulated to meet this requirement without exceeding over/ under bake specifications. 3.5 APPEARANCE. Shall meet appearance standards as specified on the part drawing. 3.5.1 When applied on the second surface of clean exterior acryl
7、ic or polycarbonate, the coating shall be free from defects such as loss of adhesion, blisters, cracks, thin spots, and pin holes. 3.5.2 After Exposure. There shall be no blistering, peeling, cracking, loss of adhesion, discoloration, or kindred failure of the coating visible to the naked eye after
8、exposure. 3.6 PERFORMANCE. The following requirements are applicable to coatings which have completed a minimum aging period of 72 h following the baking and drying operation. 3.6.1 Must pass humidity resistance per GM446SP for 96 h followed by Tape Adhesion (GM9071P) with no change of appearance an
9、d a minimum of 99% retention of the film. 3.6.2 Must pass Moisture Cold Cycle per GM9505P followed by Tape Adhesion (GM9071P) with no change of appearance and a minimum of 99% retention of the film. 3.6.3 Must pass Heat Aging Resistance per GM9504P for 168 h 7O C followed by 96 h Humidity (GM446SP)
10、and Tape Adhesion (GM9071P) with no change of appearance and a minimum of 99% retention of the film. 3.6.4 QUV Exposure (GM912SP) or Xenon Arc Weatherometer (GM912SP) may be used to predict the weath- erability of this material, but final acceptance must be dependent on actual outdoor exposure testi
11、ng. 3.6.5 Must pass 12 month Florida exposure (GM9136P) fol- lowed by 96 h Humidity (GM446SP) and Tape Adhesion (GM9071P) with no significant change of color and a mini- mum of 99% retention of the film. Florida results will supersede any laboratory accelerated testing. 3.7 APPROVAL. When testing is
12、 satisfactorily completed per the above requirements, approval to this specification will be given. The paints per this specification must be evaluated and approved for each specific design. 3.8 APOPS. For full specific system approval refer to the Qualification Procedure Section in the APOPS. 4 SOU
13、RCE SHIPMENT RESPONSIBILITY. It will be the responsibility of the supplier to insure that the material is not exposed to temperatures during shipment which would cause the material to fail to meet any of the requirements of this specification. 5 INITIAL SOURCE APPROVAL. No shipment shall be made by
14、any supplier until representative initial production samples have been approved by engineering as meeting the requirements of this specitication. 5.1 Completed copies of the Material Safety Data Sheet meeting GM information requirements must be submitted with any new submissions or whenever a compos
15、ition change has occurred 6 INSPECTION AND REJECTION. All shipments of material or parts under contract or purchase order manufac- tured to tbis specification shall be equivalent in every respect to the initial samples approved by engineering. There shall be no changes in either formulation or manuf
16、acturing processes permitted without prior notification and approval by engineer- ing. Lack of notification by the supplier constitutes grounds for rejection of any shipment. While samples may be taken from incoming shipments and checked for conformance to this 0 cbpylght DEOEMEER 1697 ClenenJ Motm
17、chpmtkn All Fdgtita RelKn+d DECEMBER 1997 PAGE 1 9984286 Copyright General Motors North America Provided by IHS under license with GM Licensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 06/23/2008 19:50:27 MDTNo reproduction or networking permitted without license from IHS -,-,- VND.G
18、M 998428b-ENGL I,977 = ?!llDb37=l Cl020422 183 111 r GENERAL MOTORS ENGINEERING STANDARDS I Materials and Processes - Paint I EXTERIOR DECORATIVE SECOND SURFACE FINISHES ON PLASTIC PARTS 9984286 specification, the supplier shall accept the responsibility for specification number have been qualified
19、by engineering as incoming shipments meeting this specification without depen- meeting the requirements of this specification. Sources are dence upon purchaser s inspection. available through the on-line MATSPC System. 7 APPROVED SOURCES. Engineering qualification 8 GENERAL INFORMATION. This standar
20、d was origi- of an approved source is required for this specification. Only nated by Inland Fisher Guide Anderson Operations in sources listed in the GM Corporate Materials File under this February 1994 and first published in December 1997. 9984286 0 ccyi$lt DECEMBER lee7 Gerwd h43tors cIapmh AI Fughta i3mefwd PAGE 2 DECEMBER 1997 Copyright General Motors North America Provided by IHS under license with GM Licensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 06/23/2008 19:50:27 MDTNo reproduction or networking permitted without license from IHS -,-,-