1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2011 03 01 No replacement named A. Pan, APA N Status 2006 05 19 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.6, 3.7 & 4 1992 08 03 Released EP00E10176303000 K. Gerhards Printed copies are uncontrolled Copyright 2011, Ford Global Technologies
2、 LLC Page 1 of 2 POLYPROPYLENE (PP) FOAM, CLOSED CELL WSK-M4D851-A 55 kg/m DENSITY NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a closed cell polypropylene foam with a nominal density of 55 kg/m, produced by molding of expanded polypropylene beads. 2. APPLICA
3、TION This specification was released originally for material used as headlining spacer. 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 APPEARANC
4、E The foam shall have 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 3.5.1 Density 40 - 55 kg/m (ISO 845/ASTM D 3574, Test A) 3.5.2 Tensile Strength, min 350 kPa (ISO 1798/ASTM D 3574, Test E, 50 mm benc
5、h marks, 5 specimen minimum) 3.5.2.1 Elongation at Break, min 8% (Test acc. to 3.5.2) 3.5.3 Compression Set, max 46% (ISO 1856, Method A/ASTM D 3574, Test D, ct calculation, 22 h at 23 C, 50% deflection, 3 specimens, minimum) 3.5.4 Compression Deflection Stress 220 - 330 kPa (ISO 3386/1 at 40% compr
6、ession, specimen size 100 x 100 x 50 mm, test speed 100 +/- 20 mm/min) 3.5.5 Water Absorption, max 30% (ASTM D 1056, subject specimen to a vacuum of 84 kPa) ENGINEERING MATERIAL SPECIFICATIONWSK-M4D851-ACopyright 2011, Ford Global Technologies, LLC Page 2 of 2 Printed copies are uncontrolled 3.5.9 O
7、dor, max Rating 2 3.5.6 Dimensional Stability, max -4% Test Method: A specimen approx. 300 x 300 mm in size shall be placed in a mechanical convection oven maintained at 100 +/- 2 C for 3 h. Dimensional changes shall be measured after cooling down to room temperature. 3.5.7 Resistance to Cold Impact
8、 The material shall show no breaks, cracks or other failures. Test Method: The specimen shall be aged for 24 h at 80 +/- 1 C and than stored for 16 h at - 30 +/- 1 C. Remove specimen from cold box, place in horizontal position and within 5 s after removal drop a steel ball of 225 +/- 5 g and approx.
9、 38 mm in diameter onto the test specimen from a height of 300 mm. Evaluate after conditioning to room temperature. 3.5.8 Fogging (FLTM BO 116-03) Fog Number, min 80 Formation of excessive amounts of clear film or droplets is cause for rejection. (FLTM BO 131-01/SAE J1351) 3.5.10 Flammability (ISO 3
10、795) Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x 100 x 3.0 +/- 0.1 mm with smooth surfaces. 3.6 ADDITIONAL REQUIREMENTS Specific requirements for material and/or manufactured parts shall be specified on the Engineering drawing, Engineering parts specificati
11、on and/or performance specifications. All critical areas with respect to these properties shall be clearly designated on the Engineering drawing. 3.6.1 Density, finished parts 55 +/- 5 kg/m (ISO 845/ASTM D 3574, Test A) 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 RECYCLING CODE SAE or PP PP OPTIONAL
