GMNA-9984264-1995.pdf
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1、- =JOOb379 0004824 3411 GENERAL MOTORS ENGINEERING STANDARDS I Materials and Processes - Paint I OPAQUING PAINTS FOR HEAT SENSITIVE PLASTICS FOR LIGHTING APPLICATIONS 9984264 1 SCOPE. This specification covers the requirements for optical grade opaquing paints to be used over heat sensitive plastic
2、lenses for exterior lighting applications having heat dis- tortion temperatures below 82 C. This specification includes first and second surface painting applications. 1.1 These opaquing paints are part of a total painted product system and must meet the requirements set forth in this speci- ficatio
3、n and those shown on engineering drawings. This specification shall be used in conjunction with the Approved Paint on Plastics Systems (APOPS), a section of Materials Specification File (MATSPC) which lists approved substrate, cleaning, priming, and topcoat combinations. 2 REFERENCED STANDARDS. GMlO
4、OOM GM4389M GM4348M GM4465P GM4350M GM9071P GM4367M GM91 25P GM9163P GM9505P GM9509P 3 REQUIREMENTS. 3.1 RESTRICTED AND REPORTABLE CHEMICALS (GMlOOOM). By 1997 start of saleable vehicles, all materials supplied to this specification must comply with the require- ments listed in GMlOOOM, “Restricted
5、and Reportable Chemicals.” 3.2 SURFACE PREPARATION. The surface must be clean and free of surface defects which would affect photometric performance or appearance. 3.3 APPLICATION. Reduce and apply uniformly to achieve total opacity 1 mil (25pm). 3.4 CURE. Surface of part must be within the range of
6、 time and temperature specified by the supplier for cure, and must be checked per GM9509P Time in oven and ambient temperature must be regulated to meet this requirement without exceeding over/under bake specifications. 3.5 APPEARANCE. Must meet the requirements of GM4348M with the exception of glos
7、s and DO1 which shall be specified on the part drawing. 3.6 PERFORMANCE. Finished lens must meet the require- ments of GM4465P with no evidence of blistering or other appearance change at the end of 96 h followed by GM9071P with a minimum of 99% retention. Additionally, the finished lens must meet t
8、he requirements of GM9505P (cycle A) and 24 h of humidity (GM4465P) followed by GM9071P with a minimum of 99% retention. 3.7 APPROVAL. When testing is satisfactorily completed per the above requirements, approval to this specification will be given. The opaquing paints per this specification must be
9、 evaluated and approved for each specific design. 3.8 APGPS. For full specific system approval refer to the Qualification Procedure Section in the APOPS. 4 SOURCE SHIPMENT RESPONSIBILITY. It will be the responsibility of the supplier to insure that the material is not exposed to temperatures during
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