1、GM DAEWOO Auto & Technology EDS Engineering, GM DAEWOO Auto & Technology Standards PRIMER SURFACER (LOW BAKE TYPE) EDS-M-8740 ISSUED DATE: 1995. 12. 06 REVISED DATE: 2005. 12. 21 VERSION: 7 EDS-M-8740PRIMER SURFACER (LOW BAKE TYPE) PAGE: 1/10 ISSUED DATE: 1995. 12. 06 REVISED DATE: 2005. 12. 21 VERS
2、ION: 7 GM DAEWOO Auto & Technology 1. SCOPE This standard specifies the physical properties of the primer surfacer used to improve quality of the coated surface, such as adhesion and chipping resistance.2. GENERAL PHYSICAL PROPERTIES OF MATERIAL The primer surfacer contains polyester and melamine re
3、sin as the base material with addition of color pigment and permits both manual application with a general air spray gun and automatic application by the electrostatic bell machine. 3. TEST CONDITIONS 3.1. Standard conditions of test place The test sites shall basically maintain temperature at 202C
4、and humidity at 655%, be free of direct sunlight under the conditions that there shall be no gas generation and less ventilation. If not, temperature and humidity shall be recorded in the test sheet. 3.2. Material condition of test piece The test piece shall basically be the finished vehicle built t
5、o the determined coating spec, but the one built of the same material to the same spec may be used. 3.3. Baking condition 3.3.1. Test piece curing conditions shall basically be (1455)20minutes(effective time). 3.3.2. The curing time and temperature shall be based on the point when the temperature of
6、 the material to coat on reaches a designated point after the test piece is put into a dry oven. 4. REQUIREMENTS 4.1. Properties of delivered material 4.1.1. Color : According to color specifications by models 4.1.2. Delivery viscosity (EDS-T-7908) (1) Ford cup #4, 20 (2) Specified value2 Sec. 4.1.3
7、. Non-Volatile (EDS-T-7937) (1) 1202 hours (2) Specified value1.5 4.1.4. Dilution thinner : (1) EDS-M-8710 : Solid thinner EDS-M-8740PRIMER SURFACER (LOW BAKE TYPE) PAGE: 2/10 ISSUED DATE: 1995. 12. 06 REVISED DATE: 2005. 12. 21 VERSION: 7 GM DAEWOO Auto & Technology 4.1.5. Electric resistance (EDS-
8、T-7913, based on diluted paint). (1) Exterior primer surfacer : 3001,100 . (2) Interior primer surfacer : 5002,000 . 4.1.6. Specific gravity (EDS-T-7965, clause 7) (1) 100 cc Specific gravity cup, 20 (2) Specified value 0.02 4.2. Material condition at coating 4.2.1. Dilution viscosity (EDS-T-7908, F
9、ORD CUP No. 4 at 20) Add EDS-M-8710 solid thinner to the undiluted paint to adjust to specified viscosity at 20. 4.2.2. Storage stability (undiluted solution, EDS-T-7963) (1) Check the paint condition after exposure to 50120 hours and subsequent exposure from the room temperature to 202K. (2) After
10、storage, the paint shall be free from gel and seeding and the viscosity increase compared to the initial state shall less than 20 Sec. (3) No abnormalities in workability and external appearance after storage stability. 4.2.3. Dilution stability. (1) No precipitation after dilution to the specified
11、viscosity, fill it in mass cylinder and subsequent exposure to room temperature for 2 hours. (2) Vessel : Mass cylinder capable of 500L 4.2.4. Coating method (1) Automatic application by the electrostatic BELL machine. (2) Automatic application by the uninterruptible Robot (3) Manual application wit
12、h a general air spray gun. 4.2.5. Film composition of the steel plate for primer surfacer coating (1) Phosphate film (2) Phosphate film + EDS-M-8773(Electro coat) 4.2.6. Flash - off time Maintain approximately 8 minutes at a temperature of 4045. 4.2.7. Drying method : convection drying. 4.2.8. Dryin
13、g period and temperature : Maintain 20 minutes(effective time) at 1455(based on body temperature). 4.2.9. Appearance after drying : After drying, the coated surface shall show no sign of defects, such as run or pinholes etc. EDS-M-8740PRIMER SURFACER (LOW BAKE TYPE) PAGE: 3/10 ISSUED DATE: 1995. 12.
14、 06 REVISED DATE: 2005. 12. 21 VERSION: 7 GM DAEWOO Auto & Technology 5. REQUIREMENTS AFTER DRYING 5.1. Film thickness (EDS-T-7970) 5.1.1. Exterior primer surfacer : 3035W . 5.1.2. Interior primer surfacer : 1525W . 5.2. Hiding power (EDS-T-7914) 5.2.1. For the interior primer surfacer, which is app
15、lied for finishing of the hood and trunk resistance parts, and exterior primer surfacer, the practical hiding power shall not exceed 20W on the electro coating film. 5.2.2. Hiding power with the black and white sheets shall conform to the primer surfacer color characteristics as long as it does not
16、affect work(practical hiding power shall not exceed 20W ) in the line. 5.3. Paint film composition of test piece. 5.3.1. Condition A : Phosphate film + EDS-M-8773 + EDS-M-8740. 5.3.2. Condition B : Phosphate film + EDS-M-8740. 5.3.3. Condition C : Phosphate film + EDS-M-8773 + EDS-M-8740(Exterior pr
17、imer surfacer) + EDS-M-8731, EDS-M-8732. 5.4. Requirements after exposure to room temperature for 24 hours 5.4.1. Distinction Of Image / Gloss (EDS-T-7907, BYK HAZE-Gloss Meter) To be 80% min. when measured under test piece conditions A with an angle of 60. 5.4.2. Adhesion (EDS-T-7910) (1) Tape : 3M
18、 #610 (2) Cutter : Use a cutter to JIS K 5400 or equivalent cutter (NT cutter A type is recommended) (3) Tape peel angle : 90 (4) Cutter angle : approximately 30 (5) Adhesion under test piece conditions A and C shall be GT-0 and there shall be no drop in adhesion after elapse of 4 weeks 5.4.3. Hardn
19、ess (EDS-T-7948) (1) Hardness under test piece Condition A shall be 80 100. 5.4.4. Cupping (EDS-T-7974) (1) Cupping under test piece Conditions A shall be more than 5.0mm and there shall be no drop in cupping after elapse of 4 weeks. (2) Cupping under test piece Conditions C shall be more than 4mm(B
20、ut, there shall be more than 5mm, when coating under EDS-M-8732) and there shall be no drop in cupping after elapse of 4 weeks. EDS-M-8740PRIMER SURFACER (LOW BAKE TYPE) PAGE: 4/10 ISSUED DATE: 1995. 12. 06 REVISED DATE: 2005. 12. 21 VERSION: 7 GM DAEWOO Auto & Technology 5.4.5. Bending (EDS-T-7912)
21、 (1) Conical corn diameter : 9.540.5X (2) Length: 212X (3) When tested under test piece Conditions A and C, there shall be no sign of surface defects, such as cracks and peeling-off. 5.4.6. Heat resistance (EDS-T-7917) When tested under test piece Conditions A at a temperature of 100 for 240 hours,
22、adhesion shall be GT-0 and no sign of film surface defects, such as blistering, peeling and discoloration etc. 5.4.7. Over baking (EDS-T-7919) (1) Baking condition : Exposure to 1602 hours after coating with EDS-M-8766. (2) There shall be no abnormalities in the film surface and adhesion shall be GT
23、-0 after exposure at room temperature for 24 hours. 5.5. Requirements after exposure to room temperature for 72 hours 5.5.1. Salt spray resistance (EDS-T-7932) (1) Test condition : 403, 98%RH min. (2) After test under test piece Condition A and C for 480 hours, there shall be no surface changes, rus
24、ting area shall be less than 2X and adhesion shall be GT-0. (3) After test under test piece Condition B for 144 hours, there shall be no surface changes, rusting area shall be less than 2X and adhesion shall be GT-0. 5.5.2. Humidity resistance (EDS-T-7951) (1) Humidity chamber : 403, 98%RH min. (2)
25、After test under test piece Condition A for 240 hours and subsequent exposure to room temperature for 24 hours, there shall be no changes on the surface as compared to the initial state and adhesion shall be GT-0. (3) After test under test piece Condition C for 240 hours and subsequent exposure to r
26、oom temperature for 24 hours, there shall be no changes on the surface as compared to the initial state and adhesion shall be GT-1. 5.5.3. Anti-chipping (EDS-T-7945) (1) Gravel : JIS #7, 50g (2) Test temperature : Room temperature and cold temperature(-20) (3) After test under test piece Condition C
27、, rating 6 or higher shall be ensured. 5.5.4. Impact-saline solution resistance (EDS-T-7738) (1) Gravel: JIS #7, 50g (2) After test under test piece Condition C, rating 2 or below shall be ensured. EDS-M-8740PRIMER SURFACER (LOW BAKE TYPE) PAGE: 5/10 ISSUED DATE: 1995. 12. 06 REVISED DATE: 2005. 12.
28、 21 VERSION: 7 GM DAEWOO Auto & Technology 6. ADDITIONAL REQUIREMENTS 6.1. Sandability 6.1.1. Sanding method : Dry with sand paper #600, #800 & moisture sanding 6.1.2. Test method and criterion (1) Coat the 200300X of electro-deposition test piece as the specified film thickness base on relevant ext
29、ernal primer surfacer, and dry it with normal conditions. (2) Sanding Method #600 dry sanding Normal Coating #800 dry sanding #600 moisture sanding Normal Coating #800 moisture sanding (3) After removing the foreign matters on the test piece, coat with top coating(black color) and dry it. (4) Criter
30、ion : No problems at sanding, no difference in gloss between the sanded surface and normal surface after top coating and no noticeable sanding marks. 6.2. Circulation stability After storage inside the paint circulation system under the conditions identical to the line conditions for 6 weeks, there
31、shall be no deformation or marked increase in viscosity and good workability shall be provided. 6.3. Workability 6.3.1. Perform the comparative test with mass production color in principle. 6.3.2. Sagging limits (1) Perform the resistance impact onto the 300500X test piece coated with electro-deposi
32、tion at 5cm intervals, with 1/2INCH500g of weight. (2) At this moment, mark the center of hole by impact with oiliness pen. (3) Remove the masking tape after application of relevant primer surfacer uniformly and set the test piece vertically for 5 minutes in order that the masking areas shall be to
33、go down an underside, and then dry it. (4) Apply the test piece with uniform extrusion volume of gun when the comparative tests. (5) Criterion : Measure the film thickness where the sagging of oiliness pen from a center of hole shall be 5cm. This point is called as the film thickness of sagging limi
34、ts. 6.3.3. Pinhole limits (1) Apply the relevant primer surfacer onto the 300500X test piece coated with electro-deposition, and 5Y Masking tape EDS-M-8740PRIMER SURFACER (LOW BAKE TYPE) PAGE: 6/10 ISSUED DATE: 1995. 12. 06 REVISED DATE: 2005. 12. 21 VERSION: 7 GM DAEWOO Auto & Technology subsequent
35、 dry it after setting 5 minutes. (2) Measure the film thickness of the pinhole portion after drying. 6.3.4. Over spray dust (1) Apply the relevant exterior primer surfacer to test piece, and perform the over spray dust of interior primer surfacer according to the line condition or equivalent. (2) Dr
36、y it after setting at room temperature for 10 minutes after over spray dust. (3) The surface shall show no signs of cratering, loss of gloss or other surface defects after drying. 6.3.5. Cratering stability (1) Dilute paint with specified viscosity, and stir it with a stirrer for 4 hours at the room
37、 temperature. (2) The surface shall show no signs of cratering, when the top coat is applied after stirring. 6.3.6. Electrostatic painting performance (Exterior primer surfacer) When observed following electrostatic painting under the condition equivalent to the line condition, the surface shall sho
38、w no signs of abnormalities. 6.3.7. Compatibility with PVC sealer When applying the relevant primer surfacer to sealers, and examining the condition of adhesion, the surface shall show no signs of defects and the adhesion shall be GT-0. 7. EFFECTIVE PERIOD Effective period of the paint shall be 6 mo
39、nths from the date of manufacturer and at delivery the paint shall be free from severe sedimentation or non-soluble masses. 8. MATERIAL APPROVAL Part NO. Old P/NO. Approved Supplier Approved Raw Material Remarks 94545360 M-8740-A DONGJU Industrial Co., Ltd 94545361 M-8740-B DONGJU Industrial Co., Lt
40、d 94545362 M-8740-I10 DONGJU Industrial Co., Ltd 94545363 M-8740-I80 DONGJU Industrial Co., Ltd 94545364 M-8740-I86 DONGJU Industrial Co., Ltd 94545365 M-8740-N10 DONGJU Industrial Co., Ltd 94545366 M-8740-N20 DONGJU Industrial Co., Ltd 94545367 M-8740-N35 DONGJU Industrial Co., Ltd 94545368 M-8740-
41、N40 DONGJU Industrial Co., Ltd 94545369 M-8740-N45 DONGJU Industrial Co., Ltd 94545370 M-8740-N65 DONGJU Industrial Co., Ltd ADP612 94545371 M-8740-N80 DONGJU Industrial Co., Ltd ADP740S 94545372 M-8740-N90 DONGJU Industrial Co., Ltd ADP742 EDS-M-8740PRIMER SURFACER (LOW BAKE TYPE) PAGE: 7/10 ISSUED
42、 DATE: 1995. 12. 06 REVISED DATE: 2005. 12. 21 VERSION: 7 GM DAEWOO Auto & Technology Part NO. Old P/NO. Approved Supplier Approved Raw Material Remarks 94545373 M-8740-P10 DONGJU Industrial Co., Ltd ADP741 94545374 M-8740-P11 DONGJU Industrial Co., Ltd 94545375 M-8740-P19 DONGJU Industrial Co., Ltd
43、 ADP523 94545376 M-8740-P20 DONGJU Industrial Co., Ltd 94545377 M-8740-P21 DONGJU Industrial Co., Ltd ADP512 94545378 M-8740-P25 DONGJU Industrial Co., Ltd ADP535 94545379 M-8740-P27 DONGJU Industrial Co., Ltd 94545380 M-8740-P29 DONGJU Industrial Co., Ltd ADP510 94545381 M-8740-P32 DONGJU Industria
44、l Co., Ltd ADP532 94545382 M-8740-P33 DONGJU Industrial Co., Ltd ADP533 94545383 M-8740-P34 DONGJU Industrial Co., Ltd ADP434 94545384 M-8740-P40 DONGJU Industrial Co., Ltd 94545385 M-8740-P41 DONGJU Industrial Co., Ltd 94545386 M-8740-P42 DONGJU Industrial Co., Ltd ADP442 94545387 M-8740-P43 DONGJU
45、 Industrial Co., Ltd ADP443 94545388 M-8740-P44 DONGJU Industrial Co., Ltd 94545389 M-8740-P45 DONGJU Industrial Co., Ltd 94545390 M-8740-P46 DONGJU Industrial Co., Ltd 94545391 M-8740-P48 DONGJU Industrial Co., Ltd ADP448 94545392 M-8740-P49 DONGJU Industrial Co., Ltd ADP449 94545393 M-8740-P50 DON
46、GJU Industrial Co., Ltd ADP326 94545394 M-8740-P51 DONGJU Industrial Co., Ltd ADP325S 94545395 M-8740-P52 DONGJU Industrial Co., Ltd 94545396 M-8740-P56 DONGJU Industrial Co., Ltd 94545397 M-8740-P60 DONGJU Industrial Co., Ltd ADP366 94545398 M-8740-P62 DONGJU Industrial Co., Ltd 94545399 M-8740-P67
47、 DONGJU Industrial Co., Ltd ADP867 94545400 M-8740-P69 DONGJU Industrial Co., Ltd 94545401 M-8740-P70 DONGJU Industrial Co., Ltd ADP112 94545402 M-8740-P71 DONGJU Industrial Co., Ltd 94545403 M-8740-P73 DONGJU Industrial Co., Ltd 94545404 M-8740-P74 DONGJU Industrial Co., Ltd ADP113 94545405 M-8740-
48、P75 DONGJU Industrial Co., Ltd 94545406 M-8740-P80 DONGJU Industrial Co., Ltd ADP711 94545407 M-8740-P81 DONGJU Industrial Co., Ltd ADP617 EDS-M-8740PRIMER SURFACER (LOW BAKE TYPE) PAGE: 8/10 ISSUED DATE: 1995. 12. 06 REVISED DATE: 2005. 12. 21 VERSION: 7 GM DAEWOO Auto & Technology Part NO. Old P/N
49、O. Approved Supplier Approved Raw Material Remarks 94545408 M-8740-P82 DONGJU Industrial Co., Ltd 94545409 M-8740-P86 DONGJU Industrial Co., Ltd 94545410 M-8740-P87 DONGJU Industrial Co., Ltd ADP787 94545411 M-8740-P90 DONGJU Industrial Co., Ltd ADP861 94545412 M-8740-P92 DONGJU Industrial Co., Ltd ADP616 94545413 M-8740-P93 DONGJU Industrial Co., Ltd 94545414 M-8740-P95 DONGJU Industrial Co., Ltd ADP895 94545415 M-8740-U11 DONGJU Industrial Co., Ltd 94545416 M-8740
