1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2011 03 01 No replacement named A. Pan, APA N Status 2006 07 27 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.8, 3.9 & 4 1998 12 07 Activated L. Soreide Printed copies are uncontrolled Copyright 2011, Ford Global Technologies, LLC Page 1 of 3
2、 THERMOPLASTIC POLYESTER ELASTOMERIC MOLDING WSS-M4D962-A COMPOUND, 20% GLASS FIBER REINFORCED NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a glass filled (20%) thermoplastic polyester elastomer. 2. APPLICATION This specification was released originally to be
3、used as the structural reinforcement of a vinyl skin and foam passenger side air bag cover. 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). 3.1.1 All
4、 requirements of this specification, identified by symbol (s), shall be met with data representing 3 sigma values. 3.4 MOLDING COMPOUND (s) 3.4.1 Glass Fiber Content 18 - 22% (ISO 3451/1, Method A, 3 h at 650 +/- 25 C, test portion 1 - 2 g) 3.5 MOLDED TEST SPECIMEN 3.5.1 Preparation of Test Specimen
5、s Unless otherwise specified all tests shall be carried out on injection molded one-end gated test specimens. The following dimensions are required: A. 150 min x 10 x 4.0 +/- 0.2 mm (Tensile Bar, ISO 3167) B. 120 x 10 x 4.0 +/- 0.2 mm Specimens with shorter dimensions shall be cut from the center po
6、rtion of the test specimen A and/or B. The specimens shall be prepared according to ISO 294. No annealing allowed. (s) 3.5.2 Density 1.24 - 1.30 (ISO 1183, Method A) g/cm3(s) 3.5.3 Hardness, Durometer D 50 (ISO 868, 15 s dwell, +/- 5) ENGINEERING MATERIAL SPECIFICATIONWSS-M4D962-ACopyright 2011, For
7、d Global Technologies, LLC Page 2 of 3 Printed copies are uncontrolled properties determination) (s) 3.5.4 Tensile Strength at Max Load, min 25 MPa (ISO R 527, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/minute test speed (s) 3.5.4.1 Elongation at Break, min 8% (Test Method according to para 3.5.4
8、)(s) 3.5.5 Flexural Modulus, min 690 MPa (ISO 178, 80 x 10 x 4.0 +/- 0.2 mm specimen, 2 mm/minute test speed, 64 mm support span) (s) 3.5.6 Heat Aging Performance (ISO 188, except 110 +/- 50 air changes/h, 1000 h at 120 +/- 2 C. Unaged property values shall be determined at the time of the aged 3.5.
9、6.1 Tensile Strength at +/- 25% Change (Test Method per para 3.5.4) 3.5.6.2 Elongation at Break +/- 25% (Test Method per para 3.5.4) 3.6 FOGGING (SAE J1756, 3 h at 100 C heating, 21 C cooling plate, post test conditioning 1 h) Fog Number, min 70 Formation of clear film, droplets or crystals is cause
10、 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 0.8 +/- 0.1 mm with a smooth surface. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements o
11、f this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION (ISO 11359-2(TMA), -30 to 100 C) Parallel to Flow 0.4-5/C Across Flow 18.2-5/C ENGINEERING MATERIAL SPECIFICATIONWSS-M4D962-ACopyright 2011, Ford Global Technologies, LLC Page 3 of 3 Printed copies are uncontrolled 5.2 MOLD SHRINKAGE
12、(ISO 2577, approximately 150 x 100 x 3.2 +/- 0.2 mm injection molded specimen) 5.2.1 Molding Shrinkage . After 48 h at 23 +/- 2 C 0.2% 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.2% . After 30 minutes at 120 C 0.2% (s) 5.3 MULTI AXIAL IMPACT AT MAX LOAD, m
13、in (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 8.6 J 5.3.2 At 0 C 9.1 J 5.4 RECYCLING CODE TEEE-GF
