1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2003 10 17 Activated M. Mehandru Printed copies are uncontrolled Copyright 2003, Ford Global Technologies, Inc. Page 1 of 2 TAPE, ACETATE CLOTH, PRESSURE SENSITIVE, WSS-M3G176-A2 THERMOSETTING, EXTERIOR 1. SCOPE The material defined by this sp
2、ecification is an acetate cloth tape with a rubber based thermosetting pressure sensitive adhesive on one side. 2. APPLICATION This specification was released originally for materials used to seal small holes in the body frame and underbody areas after vehicle E-Coat. Underbody sealer is applied ove
3、r tape in most applications. The tape will withstand high temperature exposure for short periods (spray prime oven for example). 3. REQUIREMENTS 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production
4、Materials (WSS-M99P1111-A). 3.2 THICKNESS 0.170 - 0.230 mm (ASTM D 1000) 3.3 BREAKING STRENGTH 50 - 100 N/10 mm (ASTM D 1000) width Ultimate Elongation, min 10.0% Test Method: This shall be measured coincidentally with breaking strength. Ultimate Elongation = (L2 - L1)/L1 x 100 Where: L1 = Original
5、Length L2 = Length at Break 3.4 ADHESION STRENGTH, min 380 N/m width (ASTM D 1000, stainless steel panel) 3.4.1 Normal at 23 +/- 2 C 3.4.2 After 30 minutes at 163 +/- 3 C 3.4.3 After 7 days at 88 +/- 2 C ENGINEERING MATERIAL SPECIFICATIONWSS-M3G176-A2Printed copies are uncontrolled Copyright 2003, F
6、ord Global Technologies, Inc. Page 2 of 2 3.4.4 After 7 days at 38 +/- 2 C and 95 - 100% Relative Humidity Note: Samples shall be conditioned for a minimum of 4 h at 23 +/- 2 C and 50 +/- 5% RH after exposure periods prior to adhesion testing. 3.5 UNWIND PULL, max 900 N/m width (ASTM D 1000, Method
7、B) 3.6 THERMOSETTING PROPERTIES, min 8 h (ASTM D 1000) 3.7 STORAGE STABILITY The tape shall be stored at temperatures below 32 C. Heat greatly accelerates aging. Shelf life shall be a minimum of three months when stored above 23 C and 6 months when stored at 23 C or below. The maximum storage temper
8、ature shall be 32 C. 3.8 FUNCTIONAL APPROVAL Materials being evaluated for approval to this specification shall be subjected to a production trial. 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 meeting the requirements of this specification. 4.1 COLOR Neutral or as specified
