1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 02 2014 05 16 Revised Revised paragraph thickness requirement J. Crist, NA 2002 12 09 Revised Para 3.0 inserted; Para 3.1, 3.2, 3.3, 3.12, 3.13 & 4 deleted 1996 06 13 Activated K. Minnich, NA Controlled document at www.MATS Copyright 2014
2、, Ford Global Technologies, LLC Page 1 of 4 ADHESIVE, PRESSURE SENSITIVE, STRUCTURAL BONDING WSS-M2G389-A 1. SCOPE The material defined by this specification is a pressure sensitive adhesive film which is heat cured to provide a structural bond. The tape exhibits excellent shelf life at room tempera
3、ture and is fully cured using an autoclave process. 2. APPLICATION This specification was released originally for material used for bonding the interior rear-view mirror button to the windshield glass. The adhesive film is applied to the sintered stainless mirror button. 3. REQUIREMENTS 3.1 STANDARD
4、 REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.2 UNCURED FILM PROPERTIES 3.2.1 Color Black 3.2.2 Thickness Report, mm (ASTM D1000) The thickness tolerance for any one supplie
5、r shall be +/- 0.08 mm, based on the recorded thickness of the originally approved product and listed on the approved source list (ASL). 3.2.3 Adhesion 1.0 min (ASTM D1000, method B, flat stainless steel panel, 20 min dwell, 90 peel, 12.7 mm width) 3.2.4 Volatiles, Gravimetric 2 % max (weight loss a
6、fter 4 h, 120 C) 3.3 CURED TAPE PHYSICAL PROPERTIES 3.3.1 Color Gray 3.3.2 Breaking Strength 6,000 kPa, min (ASTM D 1000, 12.7 mm width) 3.3.3 Elongation at Break 35%, min (ASTM D1000, 12.7 mm width) 3.3.4 Modulus (ASTM D882, Die C) 3.3.4.1 At 10 % elongation 3,000 kPa, min 3.3.4.2 At 20 % elongatio
7、n 4,000 kPa, min ENGINEERING MATERIAL SPECIFICATION WSS-M2G389-A Copyright 2014, Ford Global Technologies, LLC Page 2 of 4 3.3.5 Shear Strength 12,000 kPa, min (SAE J1523, 50.8 mm/min, E-coated steel panel, 25.4 mm wide, 12.7 mm overlap, 23 +/- 2 C) 3.3.6 Flammability 100 mm/min max (ISO 3795/SAE J
8、369) 3.3.7 Odor Rating 2 max (SAE J1351) 3.4 HEAT AGED (ASTM D1000, 150 +/- 50 air changes/h, 1000 h at 90 +/- 2 C) 3.4.1 Shear Strength 12,000 min (SAE J1523, 50.8 mm/min, E-coated steel panel, 25.4 mm wide, 12.7 mm overlap, 23 +/- 2 C) 3.4.2 Visual Evaluation Pass (Shall exhibit no surface cracks,
9、 discoloration or tackiness after conditioning) 3.5 HUMIDITY AGED (ASTM D1000, 21 days at 50 +/- 2 C and 95 - 100 % relative humidity) 3.5.1 Shear Strength 10,000 min (SAE J1523, 50.8 mm/min, E-coated steel panel, 25.4 mm wide, 12.7 mm overlap, 23 +/- 2C) 3.5.2 Visual Evaluation Pass (Shall exhibit
10、no surface cracks, discoloration or tackiness after conditioning) 3.6 FINISHED PARTS The following requirements shall be assessed on samples of the mirror button bonded to the current production safety glass. Test samples shall be prepared in a manner that represents the production process. The prep
11、aration procedure shall be documented and provided with the test data. The test samples shall consist of a mirror button bonded to the center of a 100 mm x 100 mm section of current production safety glass. Separate specimens are required for each test (5 samples per test unless otherwise specified
12、in the test method). The test specimens as received and after exposure to each of the test requirements defined below shall conform to the following: There shall be no loss of adhesion, visible delamination, staining or discoloration after each of the exposure cycles. There shall be no separation of
13、 the adhesive tape from the glass or mirror button. Any attempt to remove the mirror button from the glass shall result in at least a 50 % cohesive failure of the adhesive. ENGINEERING MATERIAL SPECIFICATION WSS-M2G389-A Copyright 2014, Ford Global Technologies, LLC Page 3 of 4 Note: After each of t
14、he following exposures, condition each sample at 23 +/- 2 C and 50 +/- 5 % relative humidity for a minimum of 2 hours prior to evaluation. 3.6.1 Heat Age (ISO 188/ASTM D573, 150 +/- 50 air changes/h, 1000 h at 90 +/- 2 C) 3.6.2 Humidity Age (ISO 188/ASTM D573, 21 days at 50 +/- 2 C and 95 - 100 % re
15、lative humidity) 3.6.3 Environmental Cycling (Repeat the following cycle 5 times) 4 h at 100 +/- 2 C 4 h at 50 +/- 2 C and 95 - 100 % relative humidity 16 h at - 40 +/ - 2 C 3.6.4 Water Immersion, 24 h (FLTM BI 104-01) 3.6.5 Salt Spray Resistance, 48 h (FLTM BI 103-01) 3.6.6 Weathering Resistance (X
16、enon Arc 2000 kJ/m2 SAE J1885) 3.6.7 Fogging (SAE J1756, 3 h at 100 C heating, 21 C cooling plate,post test conditioning 1 h) Fog Number 70 min Formation of clear film, droplets or crystals is cause for rejection. 3.6.8 Outdoor Weathering 3.6.8.1 Florida Exposure 2 years direct exposure on glass sur
17、face, 5 south. 3.6.8.2 Arizona Exposure 2 years direct exposure on glass surface, 45 south. 3.7 QUALITY The material as applied shall provide a smooth homogenous film free from dust and contamination, it shall be consistent in color and texture, and free from objectionable odors during normal storag
18、e. It shall be suitable for the intended application. 3.7.1 Cleanliness The mirror buttons with the adhesive tape applied shall be packaged to maintain cleanliness and facilitate assembly. The adhesive tape as applied prior to curing is a soft tacky product. Handling and packaging precautions must b
19、e taken to provide a consistently clean product. Contamination of the adhesive tape will degrade the adhesion performance. ENGINEERING MATERIAL SPECIFICATION WSS-M2G389-A Copyright 2014, Ford Global Technologies, LLC Page 4 of 4 3.8 STORAGE STABILITY 90 days The tape and/or button with tape applied
20、shall be stored at or below 25 C away from all sources of heat and sunlight. Storage time shall not exceed 90 days. Temperatures below 0 C do not adversely affect the tape. 3.9 FUNCTIONAL APPROVAL Materials being evaluated for approval to this specification shall be subjected to a production trial.
21、Functional trial results must be approved by the affected assembly operation and Design Engineering. Results shall be made available to Materials Engineering prior to material approval and release. 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in mee
22、ting the requirements of this specification. Contact for questions concerning Engineering Material Specifications. 5. SUMMARY OF REVISIONS 2014 05 16 Changed thickness from 0.51 +/- 0.08 mm to report. Thickness of originally approved product to have same +/- 0.08 mm tolerance, see Approved Source List (ASL) for original thickness. Reformatted and renumbered
