1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2011 03 01 N Status No replacement named A. Pan, APA 2005 10 18 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.6, 3.7 & 4 1996 04 29 Activated K. Gerhards Printed copies are uncontrolled Copyright 2011, Ford Global Technologies, LLC Page 1 of
2、2 POLYETHYLENE (PE) FOAM, CHEMICALLY WSS-M4D649-A4 CROSSLINKED, CLOSED CELL NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a closed cell, chemically crosslinked polyethylene foam with a nominal density of 30 kg/m. 2. APPLICATION This specification was released o
3、riginally for material used as lamination foam for door trim panels. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.4 APPEARANCE The foam shall ha
4、ve a homogeneous medium sized cell structure with no large voids or solid spots which may impair the serviceability of the part. 3.5 TEST SPECIMEN The following material properties are based on foam material with surface skins on both sides. 3.5.1 Density 27 - 33 kg/m (ISO 845) 3.5.2 Tensile Strengt
5、h, min (ISO 1798, 50 mm bench marks, 5 specimen minimum) WMD 250 kPa AMD 200 kPa 3.5.2.1 Elongation at Break, min (Test acc. to 3.5.2) WMD 180% AMD 200% 3.5.3 Compression Deflection Stress 20 kPa (ASTM D 1056 at 25% compression) 3.5.4 Water Absorption, max 5% (ASTM D 1056, subject specimen to a vacu
6、um of 84 kPa) ENGINEERING MATERIAL SPECIFICATIONWSS-M4D649-A4 Copyright 2011, Ford Global Technologies, LLC Page 2 of 2 Printed copies are uncontrolled Fog Number, min 80% 3.5.5 Dimensional Stability, max WMD 5% AMD 5% Test Method: A specimen approximately 300 x 300 mm in size shall be placed in a m
7、echanical convection oven maintained at 80 +/- 2 C for 3 h. Dimensional changes shall be measured after cooling down to room temperature. 3.5.6 Cold Flexibility at -40 C No cracks (FLTM BN 102-01, diameter of mandrel shall be 5 times of specimen thickness) 3.5.7 FOGGING (SAE J1756, 3 h at 100 C heat
8、ing, 21 C cooling plate, post test conditioning 1 h) Formation of clear film, droplets or crystals is cause for rejection. 3.5.8 Odor, max Rating 2 (FLTM BO 131-01) 3.5.9 Flammability (ISO 3795) Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x 100 x 8.0 +/- 0.8 mm with smooth surfaces. 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 PE
