1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 09 29 N-STATUS No Replacement Named, No known use C. Mracna, NA 2004 10 22 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.8, 3.9 & 4 1999 08 13 Activated L. Soreide Printed copies are uncontrolled Copyright 2009, Ford Global Technologies,
2、 LLC Page 1 of 3 THERMOPLASTIC ELASTOMER (TEEE) WSS-M2D501-A MOLDING COMPOUND, INTERIOR NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a flexible thermoplastic elastomeric (TEEE) injection molding compound. 2. APPLICATION This specification was released original
3、ly for a material used for airbag door applications, which must be painted. First surface applications must be painted with an ultraviolet and heat resistant paint (WSS-M15J13-A). 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to
4、 the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.4 MOLDED TEST SPECIMEN 3.4.1 Preparation of Test Specimens Unless otherwise specified all tests shall be carried out on injection molded one-end gated test specimens. The following dimensions are required: 120 x 10 x 4.
5、0 +/- 0.2 mm (Type 1BA of ISO 527-2) Specimens with shorter dimensions shall be cut from the center portion of the test specimen. No annealing allowed. 3.4.2 Density 1.09 - 1.15 (ISO 1183, Method A/ASTM D 792, g/cm3Method A1) 3.4.3 Hardness, Durometer D 38 - 45 (ISO 868) ENGINEERING MATERIAL SPECIFI
6、CATIONWSS-M2D501-APrinted copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 3 (s) 3.4.4 Tensile Strength at Break, min 10 MPa (ISO 527, type 1BA/ASTM D 412, Die C, 115 x 6 x 2.0 +/- 0.2 mm specimen, 50 mm/min test speed) 3.4.4.1 Elongation at Break, min 173% (Test acc.
7、to para 3.4.4) (s) 3.4.5 Heat Aging (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 110 +/- 2 C) 3.4.5.1 Tensile Strength Change, -25% max (reading taken at 10% strain on Type 1A bars) 3.4.5.2 Impact Strength, Charpy (ISO 179, 10 specimens for each test, heat aged compared to original) At 2
8、3 +/- 2 C +/- 25% (s) 3.5 Flexural Modulus, min 60 MPa (ISO 178, 80 x 10 x 4.0 +/- 0.2 mm specimen, 2 mm/minute test speed, 64 mm support span) 3.6 FOGGING (SAE J1756, 3 h at 100 C heating, 21 C cooling plate, post test conditioning 1 h and 16 h) Fog Number, min 70 Formation of clear film, droplets
9、or crystals is cause for rejection. 3.7 FLAMMABILITY (ISO 3795) Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x 100 x 1.6 +/- 0.1 mm with a smooth surface. ENGINEERING MATERIAL SPECIFICATIONWSS-M2D501-APrinted copies are uncontrolled Copyright 2009, Ford Global
10、 Technologies, LLC Page 3 of 3 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION (ASTM D 696) 5.1.1 Temperature Range of -30 to +120 C Parallel to flow, m/m 13
11、5/ C Across flow, m/m 13-5/ C 5.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 100 x 2.0 +/- 0.2 mm injection molded specimen) 5.2.1 Molding Shrinkage . After 48 h at 23 +/- 2 C 1.1% 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 1.4% . After 30 min at 120 C 1.5% 5.3 RECYCLING CODE SAE
