1、 FORD LABORATORY TEST METHOD BU 151-01 Date Action Revisions 2000 12 01 Revised Editorial no technical change A. Cockman 1992 04 26 Printed copies are uncontrolled Page 1 of 7 Copyright 2000, Ford Global Technologies, Inc. DETERMINATION OF TRIM ADHESIVE STRENGTH Application This procedure is used to
2、 determine the strength of trim adhesives as follows: Method A Shear Adhesion Method B1 Peel Adhesion at 23 +/- 2 C Method B2 Peel Adhesion at elevated temperatures Apparatus and Materials Required Stop Watch Natural Bristle Brush Mechanical Convection Oven Of suitable size to accommodate test fixtu
3、re, fitted with viewing window and capable of maintaining temperatures up to 200 +/- 2 C. Tensile Machine With constant rates of jaw separation, adjustable up to 50 mm/minute. The Tensometer E is suitable. Test Panels Steel Body Skin Panels, according to FLTM BI 103-02, Method B, but having dimensio
4、ns according to Figures 1 - 4, unless otherwise specified by the relevant Engineering Specification. The painted test panels must not be less than 24 hours, nor more than 14 days old. Test Strips A. Fabric Non-impregnated canvas fabric having a minimum tensile strength of 1 kN/50 mm width, unless ot
5、herwise specified by the relevant Engineering Specification. B. Artificial Leather PVC coated linen or satin fabric having a minimum tensile strength of 0.6 kN/50 mm width, unless otherwise specified by the relevant Engineering Specification. FORD LABORATORY TEST METHOD BU 151-01 Page 2 of 7 Copyrig
6、ht 2000, Ford Global Technologies, Inc. C. Plastic Film PVC or Polyethylene film to requirements of the relevant Engineering Specification. Test Fixture See Figure 7 + 0.981 N load. Conditioning and Test Conditions All test values indicated herein are based on material conditioned in a controlled at
7、mosphere of 23 +/- 2 C and 50 +/- 5 % relative humidity for not less than 24 h prior to testing and tested under the same conditions unless otherwise specified. Preparation of Test Specimens 1. Stir the adhesive sample thoroughly. Adhesive must be stored in a tightly closed container to ensure that
8、solvent loss is kept to a minimum. 2. Cut test strips from the materials specified to dimensions as indicated in Figures 1 - 4. When adhesives are applied both to panel and test strip, each must be brush coated. 3. The test panels must be free from any contamination such as grease, dirt and finger m
9、arks, etc. Coat the test panel with adhesive at 23 +/- 2 C to the thickness required by the relevant Material Specification using the brush. If the Material Specification requires the application of adhesive both to the test strip and the test panel, then both must be coated within 30 seconds. 4. Al
10、low the adhesive to flash off at 23 +/- 2 C for the time required by the relevant Material Specification. Then place the test strip on the adhesive coated area of the test panel. If both test strip and test panel are coated with adhesive, position the test strip on the test panel to ensure that the
11、adhesion area is in line with the dimensional requirements of Figures 1 -4. 5. The mating surfaces must be pressed together firmly by hand to force out trapped air and ensure a good bond, within 30 seconds. 6. If the adhesive properties of the material under test are to be determined after heat agin
12、g, the test assembly must be conditioned for 16 hours at 23 +/- 2 C followed by 14 days at 70 +/- 2 C. After removal from the oven, the test assembly must be conditioned for 2 hours at 23 +/- 2 C prior to continuing the test. FORD LABORATORY TEST METHOD BU 151-01 Page 3 of 7 Copyright 2000, Ford Glo
13、bal Technologies, Inc. Procedure If varying flash off times are required by the relevant Material Specification, then the following tests must be performed for each flash off time. Method A - Shear Adhesion 1. Determine the shear adhesion on the five test assemblies (Figures 1 or 2), after condition
14、ing for the times stated in the relevant Material Specification, e.g.: A. 10 minutes B. 2 hours C. 24 hours D. 2 hours after completion of heat aging 2. Insert the test assembly in the tensile machine so that the test panel is clamped in the upper jaws with the test strip vertical. Fix squarely in t
15、he lower jaws. A 5 mm space must be left between the lower jaws and the lower edge of the test panel (Figure 5). It is essential that no load is applied to the test assembly during the loading operation. 3. With a jaw separation rate of 25 mm per minute, load the test assembly to failure, and record
16、 the maximum load. Evaluation Calculate the shear adhesion as follows: Shear Adhesion (N/mm2) = F max A Where: F max = Maximum load in N A = Adhesion area in mm2 Report the average for the 5 test assemblies including type and method of preparation. Method B1 - Peel at Room Temperature 1. Determine t
17、he peel adhesion on the five test assemblies (Figure 3) after conditioning for the times stated in the relevant Material Specification, e.g.: A. 10 minutes B. 2 hours C. 24 hours D. 2 hours after completion of heat aging FORD LABORATORY TEST METHOD BU 151-01 Page 4 of 7 Copyright 2000, Ford Global T
18、echnologies, Inc. 2. Insert the test assembly in the tensile machine so that the test panel is clamped in the lower jaws and the test strip is squarely clamped in the upper jaws (Figure 6). It is essential that no load is applied to the test assembly during the loading operation. 3. With a jaw separ
19、ation rate of 50 mm per minute, peel the test strip 180 degrees from the test panel in 4 separate 25 mm stages, releasing the load at the end of each 25 mm stage. Evaluation Calculate the average maximum load (N) for the 4 peeling stages, then, Peel Adhesion (N/mm) = F max b Where: F max = Average m
20、aximum peel load (N) b = Width of test strip in mm Report the average for the 5 test assemblies, and method of preparation. Method B2 - Peel Adhesion at Elevated Temperatures 1. Determine the peel adhesion on the five test assemblies (Figure 4) after conditioning the test assemblies as follows: Afte
21、r the bonding process, hold the test assembly for 24 hours at 23 +/- 2 C, followed by 1 hour at 70 +/- 2 C. Cool to 23 +/- 2 C and insert the test assembly in the test fixture (Figure 7), then load the free end of the test strip with a 0.1 kg or 100 g load as shown in Figure. 2. Condition the test a
22、ssembly in the oven at 60 +/- 2 C for 30 minutes. Raise the oven temperature in 10 C increments and hold for ten minutes at each stage, until the test strip is completely detached from the panel. Ensure that each increment is achieved as rapidly as possible within the limitations of the oven type. T
23、he length of material detached from the panel is measured with an accuracy of +/- 2 mm at each temperature level, keeping the oven door closed and controlling the degree of detachment through the view window. Note: In order to measure the “peeled off“ length accurately at each temperature stage, it
24、is recommended that 2 mm divisions are marked off on the visible painted strip on the underside of the painted panel prior to the test. Evaluation Report the average of the “peeled off“ lengths of five samples for each temperature level up to the temperature level required by the relevant Material S
25、pecification. Chemicals, materials, parts, and equipment referenced in this document must be used and handled properly. Each party is responsible for determining proper use and handling in its facilities. FORD LABORATORY TEST METHOD BU 151-01 Page 5 of 7 Copyright 2000, Ford Global Technologies, Inc
26、. DETERMINATION OF TRIM ADHESIVE STRENGTH Figure 1: Test Assembly with Fabric Figure 2: Test Assembly with Artificial Leather or Plastic Film Figure 3: Test Assembly with Fabric, Leather or Foil FORD LABORATORY TEST METHOD BU 151-01 Page 6 of 7 Copyright 2000, Ford Global Technologies, Inc. DETERMINATION OF TRIM ADHESIVE STRENGTH Figure 4: Test Assembly for Fabric, Leather or Foil FORD LABORATORY TEST METHOD BU 151-01 Page 7 of 7 Copyright 2000, Ford Global Technologies, Inc. DETERMINATION OF TRIM ADHESIVE STRENGTH Figure 6
