1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 01 19 N-STATUS No replacement named J. Cirst, NA 2006 04 11 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.7, 3.8 & 4 1992 02 28 Released NB00I10043054163 L.A. Graham Printed copies are uncontrolled Copyright 2010, Ford Global Technologie
2、s, LLC Page 1 of 3 POLYPHENYLENE ETHER + POLYSTYRENE BLEND (PPE+PS) WSB-M4D824-A FOAM, RIGID NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a rigid polyphenylene polystyrene blend (PPE+PS) foam produced by expanding of PPE+PS beads. 2. APPLICATION This specifica
3、tion was released originally for material used for energy management around the steering column cover, e.g. knee bolster. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materia
4、ls (WSS-M99P1111-A). 3.4 APPEARANCE 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 The following material properties are based on specimens prepared from expanded foam plaques. All sp
5、ecimens shall be free from molded skin. 3.5.1 Density 100 +/- 5 kg/m3(ISO 845/ASTM D 3574, Test A) 3.5.2 Flexural Strength, min 1.25 MPa (ASTM C 203, 254 mm support span, 305 x 76 x 25 mm specimen, test speed 13 mm/minute) 3.5.3 Compressive Strength, min 450 kPa (ISO 844/ASTM D 1621, at 10% strain,
6、specimen size 50 x 50 x 25 mm, test speed 13 mm/minute) 3.5.4 Water Absorption by Volume, max 0.6% (ASTM C 272, 24 h immersion at 23 +/- 2 C) ENGINEERING MATERIAL SPECIFICATIONWSB-M4D824-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2 of 3 3.5.5 Heat Aged (ISO
7、188/ASTM D 573, 150 +/- 50 air changes/h, 168 h at 100 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.5.5.1 Flexural Strength Change, max +/- 20% (Test Method per para 3.5.3) 3.5.5.2 Compressive Strength Change, max +/- 10% (Test Method per pa
8、ra 3.5.4) 3.5.6 Heat Aging Performance (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) 3.5.6.1 Flexural Strength Change +/- 25% (Test Method per para 3.5.3) 3.5.6.2 Compressive Strength
9、Change +/- 20% (Test Method per para 3.5.4) 3.5.7 FOGGING (FLTM BO 116-03) Fog Number, min 80 The formation of droplets or coalescence into a clear film is cause for rejection. 3.5.8 Odor, max Rating 2 (FLTM BO 131-01/SAE J1351) 3.6 FLAMMABILITY (ISO 3795/SAE J369) Burn Rate, max 100 mm/minute The s
10、pecimen size required for material approval is 355 x 100 x 3.0 +/- 0.1 mm with a smooth surface. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 INSTRUMENTED IMPACT AT -29 C, min 12 J (ASTM D 3763,
11、 76 mm tup, 295 m/minute velocity) 5.2 MAXIMUM USE TEMPERATURE 110 C (ASTM C 447) ENGINEERING MATERIAL SPECIFICATIONWSB-M4D824-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 3 of 3 5.3 PARTICLE SIZE DISTRIBUTION, by Weight US Sieve 16, max 15% US Sieve 20, max 100% US Sieve 30, max 100% US Sieve 40, max 2% Pan, max 1% 5.4 PENTANE CONTENT, by Weight 5.0 - 7.0% (Total Volatiles - ASTM D 3030, Water Content - ASTM D 2842) 5.5 RECYCLING CODE SAE or PPE+PS PPE+PS OPTIONAL
