1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions 2011 06 23 N Status No replacement named. M. Gramlich, NA 2005 02 03 Activated M. Myers Printed copies are uncontrolled Copyright 2011, Ford Global Technologies, LLC Page 1 of 7 ACRYLONITRILE STYRENE ACRYLATE (ASA) MOLDING WSS-M4D833-A2 COMPO
2、UND, EXTERIOR HIGH GLOSS NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a thermoplastic injection molding compound based on acrylonitrile-styrene-acrylate specially formulated to provide a high gloss finish. 2. APPLICATION This specification was released origina
3、lly for material used for unpainted black high gloss exterior applications such as outside rearview mirror shells and sail panels. 3. REQUIREMENTS 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Productio
4、n Materials (WSS-M99P1111-A). 3.1.1 All requirements of this specification, identified by symbol (s), shall be met with data representing 3 sigma values using latest ISO test methods. 3.1.2 This specification was developed for virgin material only. The use of regrind in parts used on Ford vehicles i
5、s not allowed without the prior written approval from Ford Materials Engineering. Written approval from Ford Materials Engineering must be requested on a part-by-part basis. All requests for approval must be accompanied with the following: - Engineering drawing defining the maximum allowable regrind
6、 content as a significant characteristic. - Complete PV test data for parts manufactured with the maximum allowable regrind content as specified on the engineering drawing, 3.2 MOLDING COMPOUND (s) 3.2.1 Melt Flow Rate 3.0 - 12.0 g/10 minutes (ISO 1133, 220 C, 10.0 kg) The material shall be dried fo
7、r 2 h minimum at 90 C in a mechanical convection oven immediately preceding the test. 3.3 MOLDED TEST SPECIMEN 3.3.1 Preparation of Test Specimens Unless otherwise specified all tests shall be carried out on injection molded one-end gated test specimens. The following dimensions are required: A. 150
8、 minimum x 10 x 4.0 +/- 0.2 mm (ISO 3167, Type 1A) B. 60 x 60 x 2.0 +/- 0.1 mm (ISO/DIS 294-3) C. 355 x 100 x 1.0 +/- 0.1 mm (ISO 3795) ENGINEERING MATERIAL SPECIFICATION WSS-M4D833-A2 Printed copies are uncontrolled Copyright 2011, Ford Global Technologies, LLC Page 2 of 7 Test specimen A shall be
9、molded using molding conditions defined in ISO 6402-2. Specimens with shorter dimensions shall be cut from the center of the specimen A. No annealing allowed. 3.3.2 Density 1.04 1.16g/cm3 (ISO 1183, Method A) (s) 3.3.3 Tensile Strength at Yield, min 35 MPa (ISO 527-1 150 x 1 x 4 mm specimen specimen
10、 A. Test speed shall be 5 mm/minute for all materials. Provide a curve of tensile stress versus strain using one specimen per lot at each of the following temperatures: -40 C, -30 C, 23 C, 52 C and 78 C. For ductile materials, the curve shall cover strain through yield point. ENGINEERING MATERIAL SPECIFICATION WSS-M4D833-A2 Printed copies are uncontrolled Copyright 2011, Ford Global Technologies, LLC Page 6 of 7 ENGINEERING MATERIAL SPECIFICATION WSS-M4D833-A2 Printed copies are uncontrolled Copyright 2011, Ford Global Technologies, LLC Page 7 of 7
