GMNA-9984165-1991.pdf
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1、m 900b3-79 0003641 770 I GENERAL MOTORS ENGINEERING STANDARDS I Materials and Processes - Paint SEALER - BODY SHOP, PAINTABLE, NONWELD THROUGH, PUMPABLE 9964165 1 SCOPE. This specification details the requirements of a 3.1.7 Toxicity. The material must not adversely affect those body shop applied, l
2、acquer paintable, nonweld through, personnel handling it. In addition, the supplier must submit a pumpablc sealer with enhanced wash off resistance The GM Material Safety Data Sheet and receive approval from all material is intended to seal interior and exterior body joints appropriate medical, safe
3、ty, and Industrial Hygiene Depart- against water, dust and air intrusion. ments before the material can be used in production. 1.1 The material must be a smooth and homogeneous mixture free of air, lumps, unmixed particles and foreign materials. It must be capable of being dispensed with standard pr
4、oduction pumping equipment, as recommended by the mated supplier. 3.2 Paf ormancc Requirements. 1.2 The material must adhere to production oily metal substrates, as detailed on the !&ala Substrate Compatibility Charts for each approving division. It must have good weatherability and must not acceler
5、ate rusting of steel over which it is applied. 3.2.1 Adhesion. One set of sealer panels per each oily metal substrate as detailed on the Sealer Substrate Compatibility Charts for each approving division, under this specification, shall be prepared per GM98OlP and baked (Lacquer Sys- tems) as follows
6、: 2 REFERENCED STANDARDS. 25 minutes at 157 C +25 minutes at 163 C +20 minutes at 121 C +25 minutes at 163 C GM4298P GM4465P GM9OlOP GM9037P GM9505P GM9763P GM9773P GM98OlP GM9804P GM9828P GM9832P ASTM D638 ASTMDlOO2 ASTM D1475 SAE J1524 SAE J1864 3.2.1.1 The sealer material must not crack nor lose
7、adhesion to the ELPO panel during or after the following conditions: IIlithl: A&r cooling at ambient conditions for a minimum of 24h 3 REQUIREMENTS. Specitk mat&al rquircmmts and appropriate teat methods are Wed under properties. (All bake schedules are specified in metal temperatures.) Exterior Cyc
8、le (GM9505P. cycle P): 6 weeks Heat Aging: 336h at 70C 3.1 Physical Properties. 3.1.1 Specific Gravity (ASTM D1475). An individual specif- ic gravity range for each approved source will be set at the time of approval to this specification. This specific gravity range will become a requirement of tha
9、t material. Salt Spray (GM4298P): 336 h neutral salt spray. Humidity (GM4465P): 168 h at 38 C/100% RH 3.1.2 Solids Content (GM9OlOP) . . . . . . . . . . 95% min by mass 3.1.3 Viscosity (SAE 51524). 3.2.2 Appearance. When topcoated with the appropriate paint systems as detailed on the Sealer Substrat
10、e Compatibili- ty Charts for each approving division and baked as described in 3.2.1, the topcoat must not show any loss of gloss, cracking, discoloration, or loss of adhesion to sealant material during or after the following conditions: GiliCe . . . . . . . . . . . . . . . . . . . *. 0.50 mm Pressu
11、re . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ._. . . . . . . . . . . 275 kPa Samplemass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20g seconds . . . . . The viscosity (in seconds) for each approved source will be set at the tim
12、e of approval to this specification. That viscosity range will become a requirement of that material. Illitid: After cooling at ambient conditions for a minimum of 24h Exterior Cycle (GM9505P, Cycle F): 6weeks Heat Aging: 336h at 70C 3.1.4 Color . _ Black,grayorcream 3.1.5 Particle size. The materia
13、l must be capable of passing through a 60 mesh screen. 3.2.3 Cold Slam (GM9773P). Material baked as described in 3.2.1 must not crack nor lose adhesion prior to of after 2 slams at -30 C. 3.1.6 Odor (GM9832P). The sealer must not have a toxic or noxious odor. After curing, the sealer must be relativ
14、ely non- odorous. In addition, the EDx, value of its odor may be requested at the time of approval. 3.2.4 Tensile (ASTM D638). Material baked as described in 3.2.1 must have a minimum tensile strength of 700 kPa The test speed shall be 2mm/s. MARCH 1991 PAGE 1 9964165 Copyright General Motors North
15、America Provided by IHS under license with GM Licensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 06/23/2008 19:59:22 MDTNo reproduction or networking permitted without license from IHS -,-,- m 9006379 0003642 607 I GENERAL MOTORS ENGINEERING STANDARDS I Materials and Processes - Pain
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