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1、 _ _ _ _ = 9006379 0005002 3LT I I GENERAL MOTORS ENGINEERING STANDARDS Materials and Processes - Paint I SEALER-PREFORMED, EXPANDING, LOW BAKE, NONTACKY 9984526 WPt A 1 SCOPE. This spccifcation detaiis the rrquirements o f a preformed, expanding, low bakc, nontacky der. The mate- rial is intended t
2、o seal interior and exterior body joints against water, dust and a i r intrusion. Expansion Range, % 100-200 1.1 The matcrial must be a smooth and homogeneous mixtuxc h e of a i r , himps unmixed pticlcs and foreign matcrialS. 1.2 The material must adhere to production oily CRS, galva- nized metai a
3、nd ELPO substrates as detailed on the Staler Substrate Compatiility Charts for each approving division. It must have good weatherability and must not accelerate the rusting of steel over which it is applied 1.3 Thc meterial comes in a variety of expansion ranges as follows: B C D E F G 200-300 30040
4、0 400-500 500-700 700-900 m+ 2 REFERENCED STANDARDS. GM4298P GM964oP GM9828P GM4465P GM9753P GM983 1P GM901OP GM9763P GM9832P GM9011p GM9764P ASTM D5 GM9037P GM9773P AsTMD92 GM955P GM9801P ASTM D1475 3 REQUIREMEMS. Specific material xcquirtmcnts and schedules a l e .spc&cd m tprie at metal ttmperatu
5、re.) appropriate test dads are iistcd under propeaies. (Ail bake 3.1 FHYSICALPROPERTiES. 3.1.1 SC Gtavity (ASTM D1475): 1.2 typicat An indi- viduai specific gravity range f o r d approved s o m wiilbe set a t the tHnt of approval to t h i s specificatiw. This specific gravity range wiilbecom a quimx
6、mt ofthatmaterial, 3.1.2 Solids Content (GM9010P) . 97% min by mass 3.1.3 Hardness (ASTM D 5 ) . U n c u r e d matcrial, needle pene- 3.1.4 Odor (GM9832P). The &aler must not have a toxic o r noxious odor. Afta curiug, the sealer must be xclatively non- odorous. trometer. 415 mm 25C wing 50 g total
7、load. 3.1.5 T o x i c i t y . The matcrial must not adversely affect those pcrsomel handling it. 3.2 PERFORMANCE REQUREMENTS. 3.21 Adhesion. One set of d e r paneis per oily metai and ELPO substrate, as detailed on the Sealer Substrate Compatibility Chart, shall be prepared per GM9801P and baked as
8、follows: Low Bake Body Shop: 25 minutes 132C + 25 minutes 115C 3.21.1 The scaler material m u s t not sack nor lose adhesion t o t h e panel during or after the following conditions: Initial: of 24h After cooling at ambient conditions for a minimum Exterior Cycle (GM9505P Qcle F ) : 6 weeks H e a t
9、Aging: Humidity (GM4465P, oiiy metai): 336 h 70C 168 h 38*C/lOO% RH Cold Impact (GM9OllP): T o 1.7 J impactS -3oC 3.22 T e n s i l e / S b r i n k (GM9753P). The individual tensile and shrinkage ranges for each source will be set at the tim of approvai to this specification. These ranges wili become
10、 a 3.23 CorrosiA R e - . Apply 2 beads of der, 3 mm highx4mmwi&x2OOmmlong,tothe surfaceofazinc phosphatedcRs panel (inspect panel nrstto be 8ult it is fec of surface cornion). Bake per 3.2.1 foliowed by a 1 h bake 205.C. Remove f r o m oven and ailow panel to am1 to mom temperatare- 3.2.3.1 Initial
11、Adhesion. The material must exhibit good adhesion to the subsirate with no cracking, mon, or other deletenioiis effects. - v e one aeakr bead from the wrfpce o f tbc panet Theiie must n o t be any corrosion on the panel sur- fecemderneaththe#alerbead 3.23.2 H u m i d i t y (GM4465P). Expose panel fo
12、r 168 h 3%clfOO% R H . reqniremmt of thatmatcIiaL 3.23.3 Remove the finai sealer bead from the surface of the psnel afta humidity test. There must not be any umosion on 3.24 Expansion. Material when baked as described m 3.2.1 the panel surface mdcmd the SealCr bead. niast have an aqlansion o f : APR
13、IL 1993 PAGE 1 9984526 COPYRIGHT General Motors Corp Licensed by Information Handling Services COPYRIGHT General Motors Corp Licensed by Information Handling Services m 9006379 0005003 256 Irppc A I GENERAL MOTORS ENGINEERING STANDARDS I Materials and Processes - Palnt i Expansion Range, 96 1oo-u)o
14、SEALER-PREFORMED, EXPANDING, LOW BAKE, NONTACKY 9984526 B C D E F 0 200-300 300-400 400-500 500-700 700-900 wo+ 32.4.2 Horizontal Bridging (GM965OP). An hdividd hori- zontal bridgingrange for each approved source wiil be set a t t h e time o f approval tothis specification. This range willthen 32.43
15、 V d Ramp Expansion (GM9764P). An individual ramp expansion range for each approved source wiU be SU at hc time of approval to t h i s specification. This range will then 3.2.5 W a t e r Absorption (GM964oP) . . . . . . . . . . . . . . . . . . . . . . . . 5% max 3.3 PROCESS REQUREMENTS. 3.3.1 Smoke
16、(GM9828P). nie sealer must n o t smoke up to 190-c. 3.3.2 Blocking. sealant, as packaged, must not stick topiher when sackcd ont on top of another after 72 h 55C with a 500 g load applied. 3.3.3 Flame Resistance (GM9831P). Must resist 50 passes with an open flame. 3.4 STABLiTY REQUREMENTS (GM9763P).
17、 Material conditioned as described below must be able to pass all 3.4.1 Fdcvated T e m p e r a h i r e S - . The wsler, as shipped, must be capable of withstanding 72 h WC. 3.4.2 Low Tempmum Staiiity. The seabr. as shipped, must be capable of wlthmmb * g 3 cycles as deraiid in 3.1.23 of GhW63E 3.4.3
18、 90 days at lnanufactmx. becomtarequirement of that material becornt a requiremtnt OfthatmatUiaL requiranents of this specificatian. s t o r a g e stability. nit shelf life of tht material shall be the matenal COIIII)LICILOCs upon Itocipt of the matuial froaihc n o t to exceed 35C. The shelf l i f e
19、 of 4 SOURCE SHIPMENT RESPONSIBILITY. i t will be the msponsibiiity of the supplier to insure t h a t the material i s not exposed to temperatures during shipmnt which would CBUW the material to fail to met Of the mqUk- mnts of this specificatiaa 5 INITIAL SOURCE APPROVAL No shipment shall be made b
20、y any supplier u n t i l prcsentative i n i t i a i production samples have beea approved by engineering as meting the xequimmns of this specincation. 5.1 Completed copies of the GM Mataial Safety Data Sheet and C r i t i c a l Mnrerial Register (available h m the cnghxing departmeat or laboratory),
21、 or equivalent, must be submitted with any new submissions or when a composition change has occuntd. 6 INSPECTION AND REJECTION. All shipments of material or parts under contract or purchase order manufac- tured to t h i s specincation sha be cquivaicnt in every mspcct to the i n i t i a l samples a
22、pprod by engineering. “hem shail be no changes in either fonnulriton or manufacturing processes pamittd without prior notication and approval by engineer- ing. Lack of notification by the supplier constitutes grounds for rejection of any shipment. while samples may be taken specification, the suppli
23、er shaii accept the responsibility for incoming shipnients mpttmg this specication without depen- dence upon purchasers inspection. in addition the supplier shall be responsible for submitting a CERTIFiCATE OF ANALYSIS with each batch of matcxial arriving at a phi. This shail be prepaxed and provide
24、 data i n accord- anawiththercquiremnts detailed in GM4389M. from inaming sllipnts and checked for coaformance to this 7 APPROVED SOURCES. Engincering qualification o f an approved source is required for this spenhcation. Only SOUKXS listed in th: GM corponite Matcrials Fik under this specification
25、number have been qualified by engineering as meting the requirements of t h i s specification. Sources arc avaiabc through the anline MATSPC System. 8 GENERAL INFORMATION. This specification was originated by NAO Paint Operations and approved by the Paint Material Sptcinccitson Cmmutkc * in J n e 1992. The lat- est itvisions include: I I A I 8/92 Il(levised 3.3.1 I P T PAGE 2 APRIL 1993 COPYRIGHT General Motors Corp Licensed by Information Handling Services COPYRIGHT General Motors Corp Licensed by Information Handling Services
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