1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 10 07 N-STATUS No replacement named L. Soreide, NA 2005 12 22 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.9, 3.10 & 4 1994 06 07 Released NB00I10043054335 M. Myers Printed copies are uncontrolled Copyright 2010, Ford Global Technologie
2、s, LLC Page 1 of 5 ETHYLENE VINYL ACETATE (E/VAC) COPOLYMER WSB-M4D733-A3 MOLDING COMPOUND, EXTERIOR NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a thermoplastic ethylene vinyl acetate copolymer molding compound. 2. APPLICATION This specification was released
3、originally for material used for exterior mudflap applications. 3. REQUIREMENTS Material specification requirements are to be used for initial qualification of materials. 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Re
4、quirements 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 MOLDING COMPOUND (s) 3.4.1 Melt Flow Rate 3 - 8 g/10 minutes (ISO 1133, 230 C, 2.16 kg) (s) 3.4.3 Melt Temperature, min
5、 85 C (ISO 3146, Method C, 10 C/min heating rate) 3.5 MOLDED TEST SPECIMEN 3.5.1 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 +/- 0.2 mm (Tensile
6、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. ENGINEERING MATERIAL SPECIFICATIONWSB-M4D733-A3 Printed copies are uncontrol
7、led Copyright 2010, Ford Global Technologies, LLC Page 2 of 5 3.5.2 Density 0.93 - 0.96 g/cm3(ISO 1183, Method A) 3.5.3 Hardness, Durometer D (TPEs ONLY) (ISO 868, 15 s dwell) Above requirement applicable to rigid TPE materials only. When included, renumbering will be required. (s) 3.5.4 Tensile Str
8、ength at Break, min 11.0 MPa (ISO R 527, 150 minimum x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/min test speed) (s) 3.5.4.1 Elongation at Break, min 600% (Unfilled only) (Test Method according to para 3.5.3)(s) 3.5.5 Flexural Modulus, min 38.0 GPa (ISO 178, 80 x 10 x 4.0 +/- 0.2 mm specimen, 2 mm/min tes
9、t speed, 64 mm support span) 3.5.6 Shear Modulus at 23 C 17 - 25 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 eac
10、h temperature interval - 3 minutes minimum). Additionally, a Shear Modulus versus Temperature curve shall be plotted for -50 to +100 C temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance range shown on page 5. (s) 3.5.7 Impact Strength, Izod, min (ISO 180/1A, 80 x
11、 10 x 4.0 +/- 0.2 mm specimen, 10 specimens for each test) 3.5.7.1 At 23 +/- 2 C No break 3.5.7.2 At -40 +/- 1 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 cold box. ENGI
12、NEERING MATERIAL SPECIFICATIONWSB-M4D733-A3 Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 3 of 5 (s) 3.5.8 Vicat Softening Temperature, min 57 C (ISO 306, 10 x 10 x 4.0 +/- 0.2 mm specimens. Bath - silicone oil, temperature raise 50 +/- 5 C/h. Dial gage reset to
13、0 after addition of 5 kg weight. At 50 N load) All specimens dry as molded. If not tested immediately after molding, specimens must be stored in a sealed, moisture-proof container filled with silica gel. 3.5.9 Heat Aging Performance (ISO 188, except 150 +/- 50 air changes/h, 1000 h at 75 +/- 2 C. Un
14、aged property values shall be determined at the time of the aged properties determination) 3.5.9.1 Tensile Strength at Break Change +/- 25% (Test Method per para 3.5.3) 3.5.9.2 Impact Strength, Izod Change No break (Test Method per para 3.5.6.1, specimens to be notched before heat aging) 3.6 FOGGING
15、 (SAE J 1756, 3 h at 100 C heating, 21 C cooling plate, post test conditioning 1 h and 16 h) Fog Number, min 90 Formation of clear film, droplets 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
16、 x 2.0 +/- 0.1 mm with a smooth surface. 3.8 WEATHERING RESISTANCE After exposure in accordance with 3.8.1, 3.8.2, and 3.8.3, the material shall show no color change in excess of specified Gray Scale rating (AATCC Evaluation Procedure 1/ISO 105-A02). In addition, there shall be no cracking, crazing
17、or other deterioration. A slight loss of gloss or chalking will be allowed provided an acceptable appearance can be achieved by washing and/or polishing with Ford car polish (auto wax) after the outdoor exposure, at permission of the affected Product Development Materials Activity. All initial appro
18、vals will be based on the preliminary Weatherometer exposure, pending Florida and Arizona exposure results for final approval. ENGINEERING MATERIAL SPECIFICATIONWSB-M4D733-A3 Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 4 of 5 3.8.1 Xenon Arc Weatherometer Ratin
19、g 4-5 (SAE J1960, 1250 kJ/m2exposure minimum, specimen size: 150 x 100 mm minimum, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) 3.8.2 12 months Florida Rating 4-5 12 months Arizona (NAAO only) (SAE J1976, 5 south, direct weathering inland, specimen size: 150 x 100 mm, minimum, 3.2 +/- 0.2 m
20、m thick, molded in smooth polished mold) 3.8.3 24 months Florida Rating 3-4 24 months Arizona (NAAO only) (SAE J1976, 5 south, direct weathering inland, specimen size: 150 x 100 mm, minimum, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) The material must withstand an outdoor exposure in acco
21、rdance with SAE J 576, certified by an approved test laboratory (ETL, AAMVA, etc.). 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 2.5-5/ C (ASTM E 831 (TMA
22、), temperature range -30 to +40 C) 5.2 MOLD SHRINKAGE (ISO 2577, approx. 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% 5.3 RECYCLING CODE E/VAC ENGINEERING MATERIAL SPECIFICATIONWSB-M4D733-A3 Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 5 of 5
