1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2006 03 21 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.8, 3.9, 4; Corrected numbering 3.5.2.1 1992 11 03 Revised NB00E10043064095 M.A. Myers 1992 03 12 Released NB00I10043054164 M.A. Myers Printed copies are uncontrolled Copyright 2006, For
2、d Global Technologies, LLC Page 1 of 3 POLYPROPYLENE (PP) FOAM, CLOSED CELL, LOW DENSITY WSB-M4D815-A1 POLYPROPYLENE (PP) FOAM, CLOSED CELL, MEDIUM DENSITY WSB-M4D815-A2 POLYPROPYLENE (PP) FOAM, CLOSED CELL, HIGH DENSITY WSB-M4D815-A3 1. SCOPE The materials defined by these specifications are closed
3、 cell polypropylene foams produced by compression molding of expanded polypropylene beads. 2. APPLICATION These specifications were released originally for materials used as fillers in low flex modulus bumper covers for dimensional stability of the bumper surface or as an energy absorbing mechanism
4、in place of PGMs. 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 have a homogeneous medium sized cell structure with n
5、o 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 blocks compression molded from the same lot. All specimens shall be free from molded skin except for hardness testing. A block 900 x 600 x 50 mm is usua
6、lly sufficient for all tests. Minimum physical values for each density range are based on the minimum density for that range. A1 A2 A3 3.5.1 Density, kg/m318 39 40 55 56 - 90 (ISO 845/ASTM D 3574, Method A) 3.5.2 Tensile Strength, kPa, 100 200 450 min (ISO 1926/ASTM D 3574, 50 mm bench marks, 5 spec
7、imen minimum) ENGINEERING MATERIAL SPECIFICATIONWSB-M4D815-A1/A2/A3 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 2 of 3 A1 A2 A3 3.5.2.1 Elongation at Break, %, min 2 2 2 (Test acc. to 3.4.2) 3.5.3 Compressive Strength, kPa, min (ISO 844/ASTM D 1621, 50 x 50 x 2
8、5 mm specimen) 3.5.3.1 At 10% strain 25 100 150 3.5.3.2 At 25% strain 40 150 200 3.5.3.3 At 50% strain 90 230 300 3.5.3.4 At 75% strain 240 480 600 3.5.4 Water Absorption, % by Volume, max 8 8 8 (ASTM D 2842, subject specimen to a 51 mm head of water for 96 h) 3.5.5 Dimensional Stability, %, max 8 6
9、 4 Test Method: A specimen approximately 300 x 300 mm in size shall be placed in a mechanical convection oven maintained at 100 +/- 2 C for 3 h. Overall dimensional changes shall be measured after cooling down to room temperature. 3.5.6 Heat Aged (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 30 min
10、utes at 95 +/- 2 C test specimen as in 3.4.2) 3.5.6.1 Tensile Strength Change, %, max 10 10 10 3.5.7 Heat Aging Performance (A1 - A3) (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 80 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.5.
11、7.1 Tensile Strength Change, %, max 25 25 25 (Test method per para 3.5.3) 3.5.8 Environmental Cycling No change in appearance, (A1 - A3) color or configuration (FLTM BQ 104-07, Procedure 9) ENGINEERING MATERIAL SPECIFICATIONWSB-M4D815-A1/A2/A3 Printed copies are uncontrolled Copyright 2006, Ford Glo
12、bal Technologies, LLC Page 3 of 3 3.6 FLAMMABILITY (A1 - A3) (ISO 3795/SAE J369) Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x 100 x 12.7 +/- 0.1 mm with a smooth surface. 3.7 FOGGING (A1 - A3) (FLTM BO 116-03) Fog Number, min 60 The formation of droplets or
13、coalescence into a clear film is cause for rejection. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of these specifications. 5.1 COEFFICIENT OF LINEAR THERMAL A1 A2 A3 EXPANSION, -5/C (ASTM D 696) 5.1.1 From -40 to 23 +/-
14、2 C 12.0 10.1 9.0 5.1.2 From 23 to 80 +/- 2 C 24.0 20.0 18.0 5.2 CHEMICAL RESISTANCE No cracking, blistering, swelling or detrimental effects Test Method: Place 2 mL of fluid on test sample. Evaluate after 1 hour or evaporation, whichever comes first. Solvents/Solutions: 1) ASTM Fuel C +15% (by volu
15、me) methanol 2) Brake Fluid ESA-M6C25-A 3) Underbody Coating, ESA-M7C55-A (Widger Chemical Corp, WC 2240) 4) Automatic Transmission Fluid (ATF), ESP-M2C138-CJ 5) Motor Oil (SAE 10-W-30), ESE-M2C96-G 6) Tar and Road Oil Remover, ESR-M5B106-A 7) Windshield Washer Fluid, ESB-M8B15-B 8) Zinc Chloride (saturated) 9) Coolant, Concentrate WSE-M97B44-B 5.3 RECYCLING CODE SAE or PP PP OPTIONAL
