1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2011 03 01 No replacement named A. Pan, APA N Status 2004 10 22 Revised Para 3.0, 3.7.4, 5.5 para 3.1, 3.2, 3.3, 3.9, 3.10 para 3.4.2, 3.4.3, 3.4.4, 3.4.4.1 & 3.4.5 revised L. Graham 1999 08 27 Activated L. Soreide Printed copies are uncontrol
2、led Copyright 2011, Ford Global Technologies, LLC Page 1 of 4 THERMOPLASTIC ELASTOMERIC MOLDING WSS-M4D964-A3 COMPOUND NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a thermoplastic polyolefinic elastomer. 2. APPLICATION This specification was released originall
3、y to be used as an unpainted airbag 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 requirements of this specification, identified b
4、y symbol (s), shall be met with data representing 3 sigma values. 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: A. 150 min x 10 x 4.0 +/-
5、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 portion of the test specimen A and/or B. The specimens shall be prepared according to ISO 294. No annealing allowed. 3.4.2 Specific Gravity 0.88 - 0.93 (ISO 1183, Method A) 3.4.
6、3 Hardness, Durometer D 27 42 (ISO 868, 10 s dwell) ENGINEERING MATERIAL SPECIFICATIONWSS-M4D964-A3 Copyright 2011, Ford Global Technologies, LLC Page 2 of 4 Printed copies are uncontrolled 3.4.6.1 Tensile Strength at Change +/- 25% (s) 3.4.4 Tensile Strength at Break 8.6 - 14.0 MPa (ISO 37 Type 1,
7、average with and against, 500 mm/ minute test speed) 3.4.4.1 Elongation at Break, 470 - 740% (Test Method according to para 3.4.4) (s) 3.4.5 Flexural Modulus, 103 - 223 MPa (ISO 178, 80 x 10 x 4.0 +/- 0.2 mm specimen, 2 mm/minute test speed, 64 mm support span) (s) 3.4.6 Heat Aging Performance (ISO
8、188, except 110 +/- 50 air changes/h, 1000 h at 135 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) (Test Method per para 3.4.4) 3.4.6.2 Elongation at Break +/- 25% (Test Method per para 3.4.4) 3.5 FOGGING (SAE J1756, 3 h at 100 C heating, 21 C c
9、ooling plate, post test conditioning 1 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 100 x 0.8 +/- 0.1 mm with a smooth surface. ENGINEERIN
10、G MATERIAL SPECIFICATIONWSS-M4D964-A3 Copyright 2011, Ford Global Technologies, LLC Page 3 of 4 Printed copies are uncontrolled 3.7 WEATHERING RESISTANCE After exposure in accordance with 3.7.1, 3.7.2 and 3.7.3, the material shall show no fading or color change in excess of the specified AATCC ratin
11、g (AATCC Evaluation Procedure 1). In addition, there shall be no cracking, crazing, or any other surface deterioration. Prior to testing, the colors shall be approved for color match by the Design Center Color Laboratory. Note: Once the technology is approved with Florida and Arizona weathering resu
12、lts, all subsequent initial color approvals will be based on the preliminary weatherometer exposure, pending Florida and Arizona exposure results for final approval. 3.7.1 Xenon Arc Weatherometer, min Rating 4 - 5 (SAE J1884, 1240 kJ/m2exposure, specimen size: 150 x 100 mm minimum, 3.2 +/- 0.2 mm th
13、ick, molded in smooth, polished mold) 3.7.2 12 Months Florida Exposure, min Rating 4 - 5 (FLTM BI 160-01, 5 south, solid back, under glass, specimen size: 150 x 100 mm minimum, 3.2 +/- 0.2 mm thick, molded in smooth, polished mold) 3.7.3 12 Months Arizona Exposure, min Rating 4 - 5 (FLTM BI 160-01,
14、5 south, solid back, under glass, specimen size: 150 x 100 mm minimum, 3.2 +/- 0.2 mm thick, molded in smooth, polished mold) 3.7.4 Filtered Xenon Arc, Rating 4 - 5 DVM-0067-MA, 2406.4 kJ/m2exposure) 3.8 RESISTANCE TO SCRATCHING (FLTM BN 108-13) 7 N force using 1 mm stylus Rating 1 2 N force using 7
15、 mm mar balls Rating 1 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), -30 to 100 C) Parallel to Flow 20.8-5/C Across Flow 17.2-5/C ENGINE
16、ERING MATERIAL SPECIFICATIONWSS-M4D964-A3 Copyright 2011, Ford Global Technologies, LLC Page 4 of 4 Printed copies are uncontrolled 5.2 MOLD SHRINKAGE (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 1.5% 5.2.2 Post Shr
17、inkage (Separate specimens required for each test) . After 48 h at 80 C 1.6% . After 30 minutes at 120 C 1.7% 5.3 MULTI AXIAL IMPACT AT MAX LOAD, min (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
18、/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 35 J 5.3.2 At -40 C 35 J 5.4 RECYCLING CODE TEO 5.5 MELT FLOW INDEX Value noted in ASL (ISO 1133, 230 C, 2.16 kg) 5.6 TEAR STRENGTH 72 kN/m (Avg.) (ISO 34, Method B procedure a/ASTM D 624, Die C, average with and against)
