1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2005 12 22 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.8 M. Masserant 1990 05 22 Released NB00I10043054025 L. Moriarty; L.A. Graham Printed copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 1 of 5 THERMOPLASTIC POLY
2、OLEFIN ELASTOMER (TEO) WSB-M4D734-A MOLDING COMPOUND, PAINTED APPLICATIONS 1. SCOPE The material defined by this specification is a rigid thermoplastic polyolefin elastomer (TEO) injection molding compound. This material is non-UV stabilized black and must be painted to achieve acceptable color matc
3、h and weatherability. 2. APPLICATION This specification was released originally for material used for the driver air bag cover. 3. REQUIREMENTS Material specification requirements are to be used for initial qualification of materials. 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppl
4、iers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.4 MOLDING COMPOUND 3.4.1 Melt Flow Rate 1.6 3.3 g/10 minutes (ISO 1133/ASTM D 1238, 230 C, 2.16 g) 3.5 MOLDED TEST SPECIMEN 3.5.1 Preparation of Test Specimens Unless otherwise spe
5、cified 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 portion of the test spec
6、imen A and/or B. The specimens shall be prepared according to ISO 294. No annealing allowed. 3.5.2 Density 0.88 - 0.92 g/cm3(ISO 1183, Method A/ASTM D 792, Method A1) ENGINEERING MATERIAL SPECIFICATIONWSB-M4D734-APrinted copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 2 of
7、 5 3.5.3 Hardness, Durometer D 35 - 46 (ISO 868/ASTM D 2240, 15 s dwell) 3.5.4 Tensile Strength at Max Load, min 9.0 MPa (ISO R 527/ASTM D 638M, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/minute test speed. See para 5.3 for additional data) 3.5.4.1 Elongation at Break, min 325% (Test Method accor
8、ding to para 3.5.4)3.5.5 Flexural Modulus 275 - 500 MPa (ISO 178/ASTM D 790M, Method I, Procedure A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 2 mm/minute test speed, 64 mm support span, the radius of the loading nose 5.0 +/- 0.1 mm and of the supports 2.0 +/- 0.2 mm. See 5.4 for additional data). 3.5.6 Sh
9、ear Modulus at 23 C 80 - 125 MPa (ASTM D 4065, forced constant amplitude, fixed frequency of 1 Hz +/- 15%, strain level below 1%. Specimen approx. 60 x 10 x 4.0 +/- 0.2 mm cut from the center of specimen A. Specimen length between clamps 35-40 mm. Soak time at each temperature interval - 3 minutes m
10、in). Additionally, a Shear Modulus vs. Temperature curve shall be plotted for -50 to +125 C temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance range shown on page 5. 3.5.7 Impact Strength, Izod, min (ISO 180, Method A/ASTM D 256, Method A, 80 x 10 x 4.0 +/- 0.2 m
11、m specimen, 10 specimens for each test) 3.5.7.1 At 23 +/- 2 C No break 3.5.7.2 At -40 +/- 2 C No brea3.5.7.3 At -20 +/- 2 C No break The test specimens must be conditioned for minimum of 6 h at the above specified temperature prior to impact test. Low temperature testing shall be done within the col
12、d box, if not possible, test can be conducted outside, but within 5 s. ENGINEERING MATERIAL SPECIFICATIONWSB-M4D734-APrinted copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 3 of 5 3.5.8 Heat Deflection Temperature, min (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen
13、, at standard deflection of 0.32 +/- 0.01 mm) 3.5.8.1 At 1.80 MPa 36 C 3.5.8.2 At 0.45 MPa 47 C 3.5.9 Heat Aging Performance (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 120 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.5.9.1 Tens
14、ile Strength Change +/- 25% (Test Method per para 3.5.3) 3.5.9.2 Impact Strength, No break Izod Change (Test Method per para 3.5.6.1, specimens to be notched before heat aging) 3.6 FLAMMABILITY (ISO 3795) Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x 100 x 2.
15、5 +/- 0.1 mm with a smooth surface. 3.7 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 or crystals is cause for rejection. 5. GENERAL INFORMATION The information given below is provided for clari
16、fication and assistance in meeting the requirements of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 9.5-5/ C (ASTM D 696) 5.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 100 x 3.2 +/- 0.2 mm injection molded specimen) ENGINEERING MATERIAL SPECIFICATIONWSB-M4D734-APrinted copies are un
17、controlled Copyright 2005, Ford Global Technologies, LLC Page 4 of 5 5.2.1 Molding Shrinkage, max . After 48 h at 23 +/- 2 C 0.97% 5.2.2 Post Shrinkage, max (Separate specimens required for each test) . After 30 minutes at 80 C 1.14% . After 48 h at 80 C 1.17% . After 30 minutes at 120 C 1.26% 5.3 T
18、ENSILE STRENGTH AT MAX LOAD, min (ISO R 527/ASTM D 638M, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/minute test speed) 5.3.1 At 70 C 6.0 MPa 5.3.2 At -40 C 14.0 MPa 5.4 FLEXURAL MODULUS (ISO 178/ASTM D 790M, Method I, Procedure A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 64 mm support span) 5.4.1 At 70
19、 C 85 - 160 MPa 5.4.2 At -40 C 835 - 1180 MPa 5.5 INSTRUMENTED IMPACT STRENGTH, min (ASTM D 3763, 134 000 mm/minutes velocity, ductile) 5.5.1 At -40 C 16 J 5.6 RECYCLING CODE TEO ENGINEERING MATERIAL SPECIFICATIONWSB-M4D734-APrinted copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 5 of 5
