1、 FORD LABORATORY TEST METHOD BU 113-01 Date Action Revisions Rev. 0 2018 06 01 Released C. Wilson, NA Controlled document at www.MATS Copyright 2018, Ford Global Technologies, LLC Page 1 of 5 ADHESIVE RESISTANCE TO REFLOW AND EXPULSION Application This procedure is used to determine the resistance t
2、o reflow and expulsion of adhesive and sealant materials. It can be used to evaluate adhesives for exterior lighting applications. Apparatus and Materials Required Mechanical Convection Oven A mechanical convection oven capable of reaching and maintaining temperatures up to 110 +/- 2C. Test Panels T
3、est panels shall be a smooth, ungrained 101.6mm x 152.4mm x t (4”x 6”x t) plaque where t is the thickness of the substrate to be tested. The test panel substrate must be a 40% filled Polypropylene. Suggested Ford material specifications include WSS-M4D643-B1 or WRS-M4D643-B2/B3 (or latest update) Th
4、e use of another substrate agreed upon with Ford Materials Engineering. Adhesive Material and manufacturing recommended cure conditions. Procedure 1. Use a straight edge to trace an easily visible line on 5 test panels (one for each cure time). Draw the line on the 152.4 mm length side of the test p
5、anel. 2. Apply a 6.0 +/- 1 mm bead of adhesive 4 +/-2 mm from either end so that the lower edge of the bead is located directly above the trace line. Figure 1: Schematic of the test panel layout 3. If the bead of adhesive extends below the original trace line after application, please trace the bott
6、om of the adhesive bead onto the test panel. FORD LABORATORY TEST METHOD BU 113-01 Copyright 2018, Ford Global Technologies, LLC Page 2 of 5 Figure 2: Example of a trace line for the adhesive bead application 4. Take photograph of each test panel labelled with the adhesive bead applied. 5. Allow the
7、 test panels to lay flat at room temperature for the following conditioning times: 15 minutes, 30 minutes, 60 minutes, 2 hours, and 24 hours. 6. After each cure time has been reached, place the test panel vertically in the test chamber. 7. Allow the test panel to dwell at 107C +/-2 C for 6 hours. 8.
8、 Remove test panel from the test chamber to measure and evaluate per the evaluation section. 9. Place the test panel back in the oven for an additional 18 hours. 10. Remove test panel from test chamber to measure and evaluate per the evaluation section. FORD LABORATORY TEST METHOD BU 113-01 Copyrigh
9、t 2018, Ford Global Technologies, LLC Page 3 of 5 Figure 3: Diagram of Experiment Set Up in the Mechanical Conventional Oven Evaluation Measure and evaluate test panel within 10 minutes of removing from chamber. Evaluate bead location in reference to the etch line. If the adhesive bead has moved, me
10、asure with a ruler and record the distance from the bottom of the etch line to the lowest adhesive sag point. This failure mode is defined as reflow. FORD LABORATORY TEST METHOD BU 113-01 Copyright 2018, Ford Global Technologies, LLC Page 4 of 5 Figure 4: Example of Reflow Failure Mode on Test Panel
11、 Figure 5: Example of Reflow Failure Mode on a Lamp Assembly Record if the adhesive bead skin breaks open and allows flow outside the original skin formation. This failure mode is defined as expulsion. FORD LABORATORY TEST METHOD BU 113-01 Copyright 2018, Ford Global Technologies, LLC Page 5 of 5 Fi
12、gure 6: Example of Expulsion Failure Mode on a Lamp Assembly Take photographs of the test panels with adhesive both pre and post-test. Report 1. Adhesive identification including the following: Supplier, Material Trade Name, Type (PUR, Silicone, Hot Melt), etc. 2. Photographs of each test panel imme
13、diately after the adhesive is applied. 3. Any observations and changes in the adhesive after 6 hr in oven. (Take photographs of changes) 4. Any observations and changes in the adhesive after the complete 24hr test time in the oven. (Take photographs of changes) 5. The adhesive failure mode that occurs and when it occurred. 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.
