1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2006 01 18 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.15, 4 1996 03 22 Activated W. Curtiss G. Molnar Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 1 of 9 TAPE, ACRYLIC FOAM, PRESSURE SENSITIVE WSS-M3G1
2、68-B ADHESIVE ONE SIDE, HEAT BONDABLE ADHESIVE ONE SIDE 1. SCOPE The material defined by this specification is an acrylic foam tape coated on one side with an acrylic, pressure sensitive adhesive and coated on the other side with a heat bondable adhesive. The tape is protected by polyethylene copoly
3、mer release liners. 2. APPLICATION This specification was released originally for material used to retain exterior EDPM weatherstrips and thermoplastic polyolefin elastomers used for gimp applications. NOTE: Material defined by WSS-M3G168-B replaces the former ESB-M3G168-A and ESB-M3G168-A2. Existin
4、g drawings specifying ESB-M3G168-A or ESB-M3G168-A2 do not require revision to reflect this new classification. This specification does not describe initial adhesive bonding conditions. The procedures for part assembly shall be prescribed in accordance with adhesive manufacturer and part supplier re
5、commendations. Materials meeting this specification do not guarantee that the adhesive will function in all potential applications on a vehicle. The specific design condition should be evaluated by a plant trial or laboratory simulation prior to release of the material. 3. REQUIREMENTS 3.0 STANDARD
6、REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.4 TAPE DIMENSION As specified on the engineering drawing 3.5 PHYSICAL TAPE REQUIREMENTS 3.5.1 Thickness (ASTM D 412, 2 mm diamet
7、er foot, 57 g wt) Tape Plus Adhesive +/- 0.15 mm Tape plus adhesive thickness shall be specified on the engineering drawing. The tolerance for any one supplier shall be +/- 0.15 mm, based on the recorded thickness of their originally approved production sample. Release Liner 0.09 - 0.11 mm ENGINEERI
8、NG MATERIAL SPECIFICATIONWSS-M3G168-BPrinted copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 2 of 9 3.5.2 Color Tape color shall be specified on the engineering drawing. (Reference para 5.4) 3.5.3 Density The density tolerance for any one supplier shall be +/- 12%, based o
9、n the recorded density of their original approved production sample. (Reference para 5.5) 3.5.4 Tensile Strength, min (ASTM D 412, Die “C“) As Received 1000 kPa Aged 70 h at 100 C 1000 kPa 3.5.5 Elongation, min (ASTM D 412, Die “C“) As Received 150% Aged 70 h at 100 C 150% 3.5.6 Water Absorption, ma
10、x 3% Test Method: Form a circular ring of tape approximately 25 x 75 mm or equivalent, to obtain an exposure area of approximately 3900 mm2. A minimum contact area of the ends is used to hold the tape in a ring form. The ring is weighed and immersed in water at 23 C. A stainless steel grid is sued t
11、o retain the tape under water. After 22 h immersion, carefully remove the tape, shake excess water off, remove the remaining surface water with air at 70 - 100 kPa and weigh immediately. Calculate the average of 3 samples as a percent of the original weight for water absorption. Exercise care to min
12、imize contact with the pressure sensitive adhesive coated surfaces during this test procedure. 3.5.7 FOGGING (SAE J1756, 3 h at 100 C heating, 21 C cooling plate, post test conditioning 1 h) Fog Number, min 60 Formation of clear film, droplets or crystals is cause for rejection. Tape to be tested wi
13、th adhesive side up on the beaker bottom. Leave the release liner on the bottom surface. 3.6 TAPE ADHESION REQUIREMENTS 3.6.1 Adhesion, 90 Peel, N/mm (FLTM BU 112-02, Method A) The samples shall meet the minimum adhesion requirements both as received and after environmental aging conditions as shown
14、 below. Samples must be tested between 1 and 4 h after removal from exposure conditions, unless otherwise noted. ENGINEERING MATERIAL SPECIFICATIONWSS-M3G168-BPrinted copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 3 of 9 Tape samples are to be bonded to current production
15、 paint systems per FLTM BI 103-02, Method “C“. An anodized aluminum strip 0.013 mm thick shall be heat bonded to the heat bondable side to prevent stretching of the tape. (Reference para 5.1). Expose four samples to each of the following conditions. Record all of the test values and compare the aver
16、age to the limits outlined below: Room Temperature Aging 1 h 1.0 72 h 1.1 Heat Aging 2.0 14 d at 90 +/- 2 C Humidity 1.5 14 d at 38 +/- 2 C and 98 +/- 2% condensing humidity Water Immersion 1.5 (FLTM BI 104-01) 240 h water immersion Cycle Test (5 cycles) 2.0 Each cycle consisting of: 8 h at 90 +/- 2
17、 C 16 h at -40 +/- 2 C 8 h at 38 +/- 2 C and 98% +/- 2% condensing humidity 16 h at -40 +/- 2 C Adhesion Test Method: Insert fixture to hold test panel into lower jaw of tensile machine. This fixture must be capable of maintaining a 90 peel during test. Insert the extended end of the tape in upper j
18、aw. Initiate jaw separation at 305 mm/min. Continue to peel to end of part. Record average peel force and failure mode. 3.6.2 Liner Removal, max (ASTM D 1000 with exceptions below) As Received 1.0 N/mm 1 h at 55 C 1.0 N/mm ENGINEERING MATERIAL SPECIFICATIONWSS-M3G168-BPrinted copies are uncontrolled
19、 Copyright 2006, Ford Global Technologies, LLC Page 4 of 9 ASTM D 1000, except apply the unlined adhesive side of the tape to a clean metal panel with light finger contact and no added roller weight. Measure the force required to peel the liner from the tape. 3.6.3 Holding Power, min (FLTM BU 101-06
20、, Method B) At 70 +/- 2 C 100 h Prepare 3 enamel/anodized aluminum 645 mm2overlap shear test specimens. After conditioning at 23 +/- 2 C for 24 h, hang test specimens vertically at 70 +/- 2 C. Gently attach 1000 g weights to both specimens. The assemblies must support 1000 g weights for the specifie
21、d time. 3.6.4 Heat Resistance, max displacement 1.0 mm Prepare 3 enamel/anodized aluminum 645 mm2overlap shear test specimens as described in para 3.6.3. After conditioning for 1 h at 23 C, attach a 230 g weight to one end of the test specimen and hand it vertically in a mechanical convection oven a
22、t 120 C for 30 minutes. Allow the specimen to cool to 23 C and measure the amount of displacement from the original bonded position. 3.7 ASSEMBLY ADHESION REQUIREMENTS 3.7.1 Adhesion, 90 Peel, min The samples (gimps, gap hiders, weld hiders, weatherstrips) shall meet the adhesion requirements as rec
23、eived and after sample exposure conditions. Samples must be preconditioned for 72 h at 23 +/- 2 C prior to environmental exposure and tested between 1 and 4 hours after removal from exposure conditions, unless otherwise noted. All values expressed in N/mm width. Parts to be bonded to current product
24、ion paint systems per FLTM BI 103-02, Method C. Tape application to substrates other than painted metal is permitted provided all specification requirements are met. Adhesion Requirements: As Received, 1 h 1.1 N/mm min After Aging 1.3 N/mm min Or Cohesive Failure of Substrate The specimens exposed t
25、o the conditions listed below shall also conform to the following requirements. No cracking, curling or edges, blistering, separation, or loss of adhesion. There shall be no evidence of shrinkage or incompatibility between the materials of the construction. There shall be no evidence staining on the
26、 painted metal or other visible substrate. ENGINEERING MATERIAL SPECIFICATIONWSS-M3G168-BPrinted copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 5 of 9 Exposed duplicate samples to each of the following conditions: Room Temperature Aging (Do not precondition for 72 h) 1 h
27、72 h Heat Aging (14 d at 90 +/- 2 C) Humidity (14 d at 38 +/- 2 C and 98 +/- 2% condensing humidity) Water Immersion (FLTM BI 104-01, 240 h) Salt Spray (ASTM B 117, 500 h) Cycle Test Each cycle consisting of: 8 h at 90 +/- 2 C 16 h at -40 +/- 2 C 8 h at 38 +/- 2 C 98 +/- 2% condensing humidity 16 h
28、at -40 +/- 2 C Fluid resistance, 1 h soak at 23 +/- 2 C Windshield washer solvent Engine coolant (Use Ford approved fluids as identified by Materials Engineering) Paint Repair Oven (30 minutes at 120 +/- 2 C) Weathering Resistance, min Xenon Arc Weatherometer (SAE J 1960, 2000 h) Florida Exposure, (
29、5 south, direct weathering inland, 2 years). Arizona Exposure (45 south, direct weathering inland, 2 years). ENGINEERING MATERIAL SPECIFICATIONWSS-M3G168-BPrinted copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 6 of 9 Preparation of panels for adhesion properties: Clean su
30、rface with 100% solution of isopropyl alcohol. Cut a specimen of the taped part 200 mm in length. Remove the liner from the tape on the part. Align the part lengthwise 25 mm from the edge so as to allow the end of the part to extend beyond the end of the panel by 50 mm. Roll the part sample on the p
31、anel with one pass using the 6.8 kg roller at the rate of 50 mm/s. Condition the test panels for 72 h at 23 +/- 2 C prior to exposure. Unless otherwise specified, the test panels shall be conditioned in the tested environment at 90 altitude. Adhesion Test Method: Insert fixture to hold test panel in
32、to lower jaw of tensile machine. This fixture must be capable of maintaining a 90 peel during test. Insert the extended end of the part in upper jaw. Initiate jaw separation at 305 mm/min. Continue peel to end of part. Record average peel force and failure mode. 3.8 ADDITIONAL ASSEMBLY RESISTANCE RE
33、QUIREMENTS - CURVED PARTS The following requirements shall be assessed on sections of the part and must be included on all materials and constructions (e.g., molded corners). Parts are to be bonded to current production paint systems per FLTM BI 103-02, Method “C“, or to the applicable substrate as
34、identified by the appropriate design activity. Separate specimens are required for each test. The parts as received and after being subjected to the exposures listed below shall conform to the following requirements: No cracking, curling of edges, blistering, separation, or loss of adhesion. In addi
35、tion, there shall be no evidence of shrinkage or incompatibility between materials of the construction. Any attempt to physically separate composite weatherstrips must result in cohesive failure only. Any adhesive failure will be cause for rejection. ENGINEERING MATERIAL SPECIFICATIONWSS-M3G168-BPri
36、nted copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 7 of 9 3.8.1 Environmental Cycling Test 5 cycles. Each cycle shall consist of the following: 8 h at 90 +/- 2 C 16 h at -40 +/- 2 C 8 h at 38 +/- 2 C, 98% +/- 2% condensing humidity 16 h at -40 +/- 2 C 3.8.2 Heat Aging 14
37、 d at 120 +/- 2 C Preparation of panels for resistance properties of weatherstrip assemblies: Clean the panel surface of a 50 x 300 mm (min size) painted panel with 50/50 solution of distilled water and isopropyl alcohol. Substrates other than painted metal shall be cleaned as specified by Materials
38、 Engineering. Cut a specimen of the taped part 250 mm in length. Remove the liner from the tape on the part. Align the weatherstrip on the panel so it forms a 30 - 60 arc. Roll the weatherstrip sample on the panel with one pass using the 6.8 kg roller at the rate of 300 mm/min. Condition the test pa
39、nels for 72 h at 23 +/- 2 C prior to exposure. Unless otherwise specified, the test panels shall be conditioned in the tested environment at 90 altitude. 3.9 COLD SHOCK RESISTANCE No loss of adhesion Prepare a 230 mm long part/assembly specimen on a 100 x 300 mm test panel as described in para 3.8.
40、(Sample size 3). Roll once forward and one backward for the full length of the part with a roller described in ASTM D 1000. The roller shall be modified by the addition of weights to obtain a total roller weight of 6.8 kg. The roller speed shall be 50 mm/s. Condition the bonded weatherstrip assembly
41、 for 72 h at 23 +/- 2 C. Place the panel and the slamming fixture described in FLTM BV 101-01 in a cold box maintained at -30 +/- 1 C for a minimum of 4 h. Insert the 100 x 300 mm side of the panel in the slamming fixture so that the part assembly faces out. Allow the panel to strike the fixture onc
42、e. Perform the slam 10 times in rapid succession. Examine the specimen for adhesion loss. Repeat slamming procedure 9 more times for a total of 100 slams. ENGINEERING MATERIAL SPECIFICATIONWSS-M3G168-BPrinted copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 8 of 9 3.10 STOR
43、AGE STABILITY The unwind, pull, and ease of the liner backing removal measured by hand peel examination shall not change appreciably after 12 months storage at temperatures between 32 C - 48 C. 3.11 PRODUCT LIFE CYCLE CHARACTERISTICS Supplier shall provide data demonstrating that the material mainta
44、ins at least 85% of original tape requirements (per para 3.8) after storage at 82 C for 1000 h. 3.12 FUNCTIONAL TRIAL Materials being evaluated for approval to the specification shall be subjected to a production trial. Functional trial results must be approved by the affected assembly operation and
45、 Design Engineering. Results shall be made available to Materials Engineering prior to material approval and release. 3.13 TESTING TO FAILURE Suppliers must submit a mutually agreed upon testing to failure work plan for a material source approval. The work plan is to site the number of samples to be
46、 tested, the environmental conditions for testing and dates for periodic review of the test data with Materials Engineering. 3.14 ADDITIONAL REQUIREMENTS Specific requirements for material and/or manufactured parts shall be specified on the Engineering drawing, Engineering parts specification and/or
47、 performance specification. All critical areas with respect to these properties shall be clearly designated on the engineering drawing. All substrates to be covered by the tape shall be clean in keeping with good commercial practice. Oil, grease, dust and other foreign materials which would affect t
48、he adhesion of the tape shall be removed prior to tape application. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 MATERIAL REFERENCES FOR TEST PANELS Anodized Aluminum - 1145-05B Undyed/Unsealed,
49、 Lawrence and Frederick, 501 E. Lake Street, Greenwood, IL 60103 Enameled Steel - current paints used for specification development prepared as required in each individual paint specification, para 3.3: o ESB-M33J100-A/A2 o ESB-M33J3-A1/A5 o ESB-M36J1-A1/A2 and A3 o ASTM D 4673 ABS-PC D320B6488 o A list of applicable substrates shall be made available by Materials Engineering. ENGINEERING MATERIAL
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