1、 ENGINEERING STANDARDS General Specification LIMITED USE EDS-T-7902 Test Method for Non Structure Adhesives Do Not Use on New Program; No Replacement. /x 97 9E=9P8 E:4 4G - Note: 8 E:48t G8 =97 FF7 957%L+ , FG P-P Program 72P# 957%L: 6#$ . Copyright 2011 General Motors Company All Rights Reserved No
2、vember 2011 Originating Department: GM Korea Engineering Standards Page 1 of 15 Version : 4 1 Introduction Note: Nothing in this standard supersedes applicable laws and regulations. Note: In the event of conflict between the Korean and English language, the Korean language shall take precedence. 1.1
3、 Purpose. This standard specifies the method of testing general properties of adhesives for non-structural purposes used in automobiles. 1.2 Scope. This test method applies to adhesive for non-structural purposes applied to the interior, exterior and chassis of automobiles. 2 References Note: Only t
4、he latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. KS M2032 KS M2095 2.2 GM Standards/Specifications. EDS-T-7422 EDS-T-7702 GMW3059 2.3 Additional References. None 3 Test Preparation and Evaluation 3.1 Resources. 3.1.1 Calibration. The test
5、 facilities and equipment shall be in good working order and shall have a valid calibration label. 3.1.2 Alternatives. Alternative test facilities and equipment may also be used. However, all measuring variables as specified in this standard shall be determined correctly with respect to their physic
6、al definition. 1 P7 :0 : ., E:48 672P 2P2PH -I*F# $ Fx7F H8x ?U9IF# 8$ . 4.3.2 4G D8 2T9I . -I*I$ 4G D8t ,* 3 72P !A! -H7t M8 1GlGI (180 -I* )0 2 GlGI (90 -I* )8 2 9*) F , 2T9I8t Fp=88 9* , GI1 D# 472e8x )XF7 -$) :4F$ . Figure 3 / ,* 3 4.3.3 Adjustment of Sample. The surface adjustment of two materi
7、als to be joined shall conform to 3.1.3.3. Adhesive shall be applied to their bonding surfaces according to 3.1.3.4. Unless otherwise specified, the two shall be joined 5 minute after open time in such a way the center lines of the two correspond with each other and no space remains between the bond
8、ing surfaces by completely stroking to press it 5 times with a roller whose weight is 10 kg. 4.3.3 4G D8 99I . 9E=%L# 2P8 8* -C E+99I8t 3.1.3.3 7 8F FF , 9E=+7 3.1.3.4 7 8F7 9E=9P* $E F G C-F :44 6# 77# Open Time 5. G7 %P8 :E4 2T8 ?$) 8F4P , 9E=+7 C8 6$) 10 kg 8 8:E8x J# Roller ) 5 G 7x98H StrokeF7
9、6=F$ . GM KOREA ENGINEERING STANDARDS EDS-T-7902 Copyright 2011 General Motors Company All Rights Reserved November 2011 Page 7 of 15 Version : 4 4.3.4 Test Method and Result. After the sample is pressed, no load is applied in the standard state in 3.1.3.1. Unless specified otherwise, it is left for
10、 168 hours and then peeled off some 5mm with a hand. Then after the sample is peeled off with UTM at a tensile speed of 200 mm/min., the average peeling strength is indicated in kg/25mm. Upon necessity, the type of breakdown is reported. The UTM shall be equipped with a free-swing lever and a record
11、er to indicate the peeling length and load. 4.4 Adhesion Maintenance Time Test. 4.4.1 Type of Test. This test is to measure the adhesion maintenance time and the most effective open time of adhesive. 4.4.2 Selection of Samples. Samples for adhesion maintenance time test shall either be indicated sep
12、arately depending on the type of materials to be bonded and practicability or be the ones for shear strength test in 4.1 unless specified otherwise. 4.4.3 Adjustment of Sample. The surface adjustment of two materials to be joined shall conform to 3.1.3.3. Adhesive shall be applied to their bonding s
13、urfaces according to 3.1.3.4. They shall be joined at various open time of 1, 3, 5 and 10 minutes in such a way that no space remains between the bonding surfaces by applying a load of 10 kg for 30 seconds. After the 10 minutes, the open time shall be up to 100 minutes at an interval of 20 ) 30 minu
14、tes. 4.4.4 Test Method and Result. After the sample is joined, no load is applied in the standard state in 3.1.3.1. Measurement of shear adhesion strength is made with UTM at a tensile speed of 200 mm/min. after the sample is left exactly 10 minutes. In case the strength of the material itself to be
15、 bonded or the adhesive force is very weak, a weight may be hung in the tensile direction for measurement. The resultant shear strength is indicated in kg/cm2 for each open time, and the optimum open time is recorded. The maximum effective open time (in minute) shall preferably be recorded for adhes
16、ive maintenances time. The time during which a marked reduction of adhesion or bonded area is shown, however, shall not be added to the adhesive maintenance time. 4.5 Initial Adhesive Strength Test. 4.5.1 Type of Test. This test is to measure the adhesion at the initial stage of bonding. 4.5.2 Selec
17、tion of Samples. Samples for initial adhesive test shall either be indicated separately depending on the type of materials to be bonded and practicability or be the ones for shear strength test in 4.1 unless specified otherwise. 4.3.4 4G - -C 0 . 4G D8x 6= G 3.1.3.18 E:41B72P F:E8x 4F: 6 -$8 :44 68x
18、 7 16848 -? G 6 5 mm 9I$ 28p) $- -I*F G UTM 8p) 882$ 200 mm/min 8 2$) -I* F7 -I*I$8 D8x kg/25mm ) E4F Fx77 !8x 9IF# : * 4: 88p+ , 4G D8 F$7 29I8 F:E8x +$ 8x $6x$ !.8 1B* 4=dF 3L 8# 8p)2P d!7$# 88T)8 998x 4F: 6 500 g8 * $ 6x 9E=+8 8T% F7 4 !FF , 7$G , ?G , -18 1B* 8U6|8p) 91F ?956 -C , 9$ M8 EdF$ . 4
19、G D8 ?95F# 6 , 7$ -C ?95488x -$) :4F$ . 4.14 !F 4G . 4.14.1 4G 8 9* . 8 4G 8t 9E=9P8 9 $*8 !F 9F72P 82e -C -4=2e7 $4F7 91F# 8p)2P 4G 4.98 !F 4G 8 9I2e95 DD9I8p)$ 6$8$ . GM KOREA ENGINEERING STANDARDS EDS-T-7902 Copyright 2011 General Motors Company All Rights Reserved November 2011 Page 12 of 15 Ver
20、sion : 4 4.14.2 Selection of Samples. The surface adjustment of the sample shall conform to 3.1.3.3, and the material shall be the steel sheet with thickness 0.5 mm or below cut to (20200) mm unless specified otherwise. 4.14.3 Adjustment of Sample. Adhesive shall be applied to an entire side of the
21、steel sheet according to 3.1.3.4, which then shall be left to dry in the standard state in 3.1.3.1 for 48 hours unless specified otherwise. 4.14.4 Test Method and Result. Unless specified otherwise, the sample is put inside a low temperature chamber adjusted to (-202) E for 30 minutes. There it is a
22、ttached to a mandrel of 3 mm with the adhesive film facing outside, and is bent to 180 degree within two seconds. The peeling of and cracks of the film is visually inspected and the result is recorded. In case the bending test cannot be performed inside the low temperature chamber, test shall be con
23、ducted within 3 seconds after being taken outside the chamber. 4.15 Exposure Contamination Test. 4.15.1 Type of Test. This test applies to adhesive used mainly for bonding of vinyl films or vinyl leathers, and is to evaluate contamination of the vinyl by exposure to ultraviolet rays, such as solar r
24、ays. 4.15.2 Test Method and Result. The vinyl film or vinyl leather to be bonded are cut to a (3070) mm, half of whose inner surface is coated with oil with a paste brush. In the standard state in 3.1.3.1, it is dried naturally for 24 hours and subsequently its surface is exposed to light by a weath
25、er-O-meter (to EDS-T-7422) for 100 hours. Through visual comparison of it with the portion not coated with adhesive and unexposed portion, leak of adhesive out to the surface, discoloration and contamination are evaluated. 4.16 Dilution Test. After 80cc of sample adhesive is put into a 100cc graduat
26、ed cylinder, 200cc of designated solvent is added to dilute it. After being capped and stirred sufficiently to reach a uniform concentration, it is left in the standard state in 3.1.3.1 for 24 hours. Marked separation and precipitation of adhesive is examined. 4.17 Measurement of Solids Content. The
27、 weight of an appropriate capped container with diameter of 40 mm or more is measured (W1), and immediately after 3 to 5 gram of the sample is taken into it, the container is capped and its weight (W2) is measured. After the cap is removed, it is heated in a forced-type ventilating drier at (1053) E
28、 for 5 hours, and cooled in a desiccator. Then its capped weight is measured to calculate the solid weight by the following formula. 4.14.2 4G D8 2T9I . 9E=9P* $E F# 8* -C E+99I8t 3.1.3.37 8F FF: C-F :44 6# 77 3.1.3.18 E:41B7 862P (20200) mm ) 8$%P % 0.5 mm 8F8 IDD8p) F$ . 4.14.3 4G D8 99I . IDD8 F;
29、+ 98+7 3.1.3.4 7 8F 9E=9P* $E F C-F :44 68x 7 3.1.3.1 8 E:41B7 862P 48 48 -?F7 9F$ . 4.14.4 4G - -C 0 . 4G D8t C-F :44 68x 7 (-202) E) 99.H 48t % 3.1.3.1 7 9IF# E:41B) 24 48 -? G G894F 9E=9P8 .* , ?I8 1B* 91F$ . 4.17 GI.8 ?U9I . : 40 mm 818 95$-F 8# 7d8 :E(8x ?U9IF (W1) 9E=9P* 3 5 g =x?F7 8/* 8x $6
30、:E( (W2)8x ?U9IF$ . $87 8x 7( (1053) E I9P 3PG 9d72P 5 48 47(F G $48Bd 6|72P 4H G 0 F :E( (W3)8x ?U9IF7 $8 47 8 GI.8x 1F$ . GM KOREA ENGINEERING STANDARDS EDS-T-7902 Copyright 2011 General Motors Company All Rights Reserved November 2011 Page 13 of 15 Version : 4 Solids (%) = W 7 F W 5W6 F W 5 100 4
31、.18 Measurement of Ash Content. The residual solid (W2) obtained in the clause 4.17 is put into a melting pot of known weight (W1), and then weighed. Following gradual heating in an electric oven, it is additionally heated at (76010) E for an hour and then cooled in a desiccator and weighed to calcu
32、late ash content by the following formula. Ash Content in Solid (%) = W 7 F W 5W6 F W 5 100 4.19 Measurement of Volume Contraction. 4.19.1 Type of Measurement. This method is used for measuring the volume contraction of high viscosity adhesive. 4.19.2 Test Method and Result. One to two grams of adhe
33、sive is applied evenly on a 20 mesh net of (2030) mm in size and the weighed immediately (W3). Subsequently, weight inside distilled water of (232) E is measured (W4). The sample is left on a plate to prevent sticking of foreign matters to adhesive, and then naturally dried for 24 hours and cooled a
34、t (702) E . The weight in the air is measured again (W5), and the weight inside distilled water is measured in the same way as the above (W6) to calculate volume contraction by the following formula. Volume Contraction (%)= (W 7 F W 5) F (W 8 F W 6) F (W 9 F W 5) F (W : F W 6)(W7 F W 5) F (W 8 F W 6
35、) 100 When the sample is weighed inside water, bubbles shall not be attached to it. To do so, it is desirable to weigh it after the sample is dipped momentarily in alcohol before being dipped into water. In case of adhesive soluble in alcohol, however, this method shall be avoided. 4.20 Measurement
36、of Viscosity. According to viscosity measuring standard for each product. 4.21 Storage Stability Test. Adhesive is poured inside a sphere bottle with inside diameter of 70 mm to a depth of 120 mm or more and a circulating ventilator is installed. In a state where volatilization of solvent is prevent
37、ed, it is put inside a chamber kept at (602) E . After some time, it is taken out and made to reach an equilibrium of temperature in the standard state in 3.1.3.1. Then, viscosity is measured and recorded according to test method in clause 4.20. This procedure is repeated until adhesive is gelled or
38、 until its viscosity markedly increases. The heated time or the viscosity after some heating is recorded by figures that show stability. GI. (%) = W 7 F W 5W6 F W 5 100 4.18 G.8 ?U9I . :E(8x 8-, 6 8# $4# (W1)7 4G 4.17 8 GI.8 ?U9I8p) 66: 9 87 . (W2)8x =x?F7 :E(8x 8 G 98d) :E72P 2P2PH 7$* 7)X (76010)
39、E) F 486 47( G $448Bd :E72P !5F G :E( (W3)8x ?U9IF7 $8 47 8F7 GI. :E8 G.8x ?U9IF$ . GI.:E8 G. (%) = W 7 F W 5W6 F W 5 100 4.19 =95 3L*8 ?U9I . 4.19.1 ?U9I8 9* . 8 ?U9I-8t 982e8 7 %L# 9D$4 “8t 9E=9P8 =95 3L88 ?U9I7 957%P$ . 4.19.2 4G - -C 0 . 9E=9P 1 2 g8x 6 (2030) mm8 20 mesh /x=*8x 1F$ . =95 3L8 (%
40、)= (W 7 F W 5) F (W 8 F W 6) F (W 9 F W 5) F (W : F W 6)(W7 F W 5) F (W 8 F W 6) 100 $ , 4G D8x 3L:E72P :E( ?U9IF %& Gp8%P )d* !.(! , :08x 17F7 7d 6|8 7 .8 4* &! G 7d* ?8$8 -O?$4 887 “ , 88 +l* 4*8 E+ :E4 .7 9E=4A$ . :E4 0 #* , 8=8 F:E8p) 5 =4A , # D# 4*7 48F 8* mm 8 10 -d 3L?) E4F$ . 4.22.3 4G d .
41、4G d # EDS-T-7702 7 9I%P d * 87F$ . 4.22.4 :0$ ?U9I7 8 . Figure 4 / ,* 4 4.23 Over-Brake and Under-Brake Test. 4.23.1 Over-Brake Test. After hardening the specimen at a temperature higher by 10 E than the hardening conditions specified in the material specification of each sealer, examine the shear
42、strength, hardness, brittleness, etc. and compare the physical properties after hardening of the sealer. 4.23.2 Under-Brake Test. After hardening the specimen at a temperature lower by 10 E than the hardening conditions specified in the material specification of each sealer, examine the shear streng
43、th, hardness, brittleness, etc. and compare the physical properties after hardening of the sealer. 4.23 Over-Brake and Under-Brake Test. 4.23.1 Over-Brake Test. 5 Sealer8 8:7 +4%P G9.($ G98x 10 E “7 2P G4A G 98$I$ , $ , G 1B (Embrittlement) &%8x 4=dF7 Sealer 8 G G ,p2e8x /xF$ . 4.23.2 Under-Brake Te
44、st. 5 Sealer8 8:7 +d%P G9.($ G98x 10 E !2P G4A G 98$I$ , $ , G 1B (Embrittlement) &%8x 4=dF7 Sealer 8 G G ,p2e8x /xF$ . GM KOREA ENGINEERING STANDARDS EDS-T-7902 Copyright 2011 General Motors Company All Rights Reserved November 2011 Page 15 of 15 Version : 4 5 Provisions for Shipping 6 Notes 6.1 Gl
45、ossary. Not applicable. 6.2 Acronyms, Abbreviations, and Symbols. Not applicable. 7 Additional Paragraphs 7.1 All parts or systems supplied to this standard must comply with the requirements of GMW3059, Restricted and Reportable Substances for Parts. 8 Coding System This standard shall be referenced
46、 in other documents, drawings, etc., as follows: EDS-T-7902 9 Release and Revisions This standard was originated in June 1996. It was first approved by Engineering Standard Committee in June 1996. It was first published in June 1996. 5 2T957 $4F 9F 6 768 9I8 6.1 98,l 76 . F$-1F 68 . 6.2 66 -C dGl . F$-1F 68 . 7 .4 1F 7.1 ., E:47 9P4%P +& .E&0 43B8t GMW3059 (8TF
