1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2004 11 30 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.7, 3.8 Rev. 3.6 J. A. Mitchell1995 11 07 Activated K. D. BruleyPrinted copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 1 of 2 STYRENE BUTADIENE RUBBER (SBR),
2、EXTRUSION WSS-M2D492-A1 AND/OR COMPRESSION MOLDING, POST CONSUMER RECYCLATE 1. SCOPE The material defined by this specification is a combination of pre-consumer recycled thermoset elastomer (SBR, and/or blends of SBR and natural rubber) and fiber, modified with a minimum of 25% granulated post-consu
3、mer scrap derived from used tires. 2. APPLICATION This specification was released originally for material used in air baffles, splash shields, air management systems and sight shields. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must confo
4、rm to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.4 MATERIAL TESTING 3.4.1 Preparation of Test Specimens Whenever possible, all test specimens shall be die-cut from the finished parts. When not feasible, specimens cut from molded test sheets manufactured from the
5、same material and equivalent cure to molded parts are recommended. The test sheets shall have the following dimensions: 150 x 150 mm, min x 2.0 +/- 0.2 mm 3.5 ORIGINAL PROPERTIES 3.5.1 Density 1.16 +/- 0.05 g/cm3(ISO 1183, Method A/ASTM D 297) 3.5.2 Hardness, Durometer A 76 +/- 5 (ISO 868/ASTM D 224
6、0, instantaneous, plied-up specimen. Hand held durometers shall not be used) 3.5.3 Tensile Strength, min WMD 3.4 MPa (ASTM D 412, Die C) AMD 2.2 MPa 3.5.4 Elongation at Break, min WMD 15% (Test Method according to para 3.5.3) AMD 40% ENGINEERING MATERIAL SPECIFICATIONWSS-M2D492-A1Printed copies are
7、uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 2 of 2 3.5.5 Tear Strength, min WMD 26 kN/m (ISO 34, Method B, Procedure (a)/ AMD 35 kN/m ASTM D 624, Die B) 3.5.6 Brittleness Point, max -40 C (ISO 812, Type B specimen/ ASTM D 2137, Method A) 3.5.7 Compression Set, max 40% (ISO 813/AS
8、TM D 395, Method B, except 25% compression, plied-up specimens, 22 h at 70 +/- 2 C) 3.6 HEAT AGED (ISO 188/ASTM D 573, 70 h at 70 +/- 2 C) 3.6.1 Hardness Change +/- 10 3.6.2 Tensile Strength Change, max 30% 3.6.3 Elongation Change, max 30% 3.6.4 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 MATERIAL IDENTIFICATION FOR RECYCLING PURPOSES SBR
