1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 06 28 N-STATUS No replacement A. Pan, APA 2006 07 26 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.7, 3.8 & 4 2000 01 05 Activated L. Soriede Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 1 of 3 THERM
2、OPLASTIC ELASTOMERIC MOLDING COMPOUND, WSS-M4D966-A (TEEE + PBT) INTERIOR NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a flexible thermoplastic elastomeric injection molding compound consisting of polyester modified with polybutylene phthalate alloy (TEEE+PBT)
3、. 2. APPLICATION This specification was released originally to be used for the second surface of a two-shot air bag covers. 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 Mater
4、ial suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.1.1 All requirements of this specification, identified by symbol (s), shall be met with data representing 3 sigma values. 3.4 MOLDED TEST SPECIMEN 3.4.1 Preparation of Tes
5、t 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 4.0 +/- 0.2 mm (Type 1BA of ISO 527-2) Specimens with shorter dimensions shall be cut from the center portion of the test specimen
6、. No annealing allowed. 3.4.2 Density 1.11-1.14 g/cm3(ISO 1183, Method A) 3.4.3 Hardness, Durometer D 57 - 62 (ISO 868, 15 s dwell) (s) 3.4.4 Tensile Strength at Break, min 16.6 MPa (ISO R 527-1/2, 50 mm/minute test speed) (s) 3.4.4.1 Elongation at Break, min 200% (Test Method according to para 3.4.
7、4)ENGINEERING MATERIAL SPECIFICATIONWSS-M4D966-APrinted copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2 of 3 (s) 3.4.5 Flexural Modulus, min 360 MPa (ISO 178, 80 x 10 x 4.0 +/- 0.2 mm specimen, 2 mm/minute test speed, 64 mm support span) 3.4.6 Heat Aging Performance (ISO
8、 188, except 150 +/- 50 air changes/h, 1000 h at 110 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.4.6.1 Tensile Strength at Break +/- 25% (Test Method per para 3.4.4) 3.4.6.2 Elongation at Break +/- 25% (Test Method per para 3.4.4) 3.5 FOGGI
9、NG (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 or crystals is cause for rejection. 3.6 FLAMMABILITY (ISO 3795) Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x 10
10、0 x 1.6 +/- 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 COEFFICIENT OF LINEAR THERMAL EXPANSION (ISO 11359-2 TMA) 5.1.1 Temperature Range of -30 to 150 C Parallel
11、to Flow 10-5/C Across Flow 15-5/C ENGINEERING MATERIAL SPECIFICATIONWSS-M4D966-APrinted copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 3 of 3 5.2 MOLD SHRINKAGE, Initial Submission Only (ISO 294-4, approximately 60 x 60 x 2 +/- 0.2 mm injection molded specimen) 5.2.1 Mold
12、ing Shrinkage After 48 h at 23 +/- 2 C 0.9% 5.2.2 Post Shrinkage (Separate specimens required for each test) After 48 h at 80 C 1.0% After 30 minutes at 120 C 1.6% 5.3 MULTI AXIAL IMPACT AT MAX LOAD, ave (ASTM D 3763, 100 x 100 x 2.5 +/- 0.2 mm edge gated injection molded specimens) Test velocity at initial contact with the test specimen shall be 6.7 m/s and must not change by more that 10% during the impact event. Load energy and velocity are to be recorded as a function of displacement. 5.3.1 At 23 C 22 J 5.3.2 At -30 C 30 J 5.4 RECYCLING CODE TEEE + PBT
