1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 10 08 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 1995 001 04 Released NB00I10043054413 M. Myers Printed copies are uncontrolled Copyright 2010, Ford Global Technologi
2、es, LLC Page 1 of 5 ETHYLENE VINYL ACETATE (E/VAC) COPOLYMER WSB-M4D733-A4 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 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 speci
4、fication, identified by symbol(s), shall be met with data representing 3 sigma values. 3.4 MOLDING COMPOUND (s) 3.4.1 Melt Flow Rate 7.0 - 10.0 g/10 minutes (ISO 1133, 230 C, 2.16 kg) (s) 3.4.2 Melt Temperature, min 90 C (ISO 3146, Method C, 10 C/minute heating rate) 3.5 MOLDED TEST SPECIMEN 3.5.1 P
5、reparation 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 minutes 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
6、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. 3.5.2 Density 0.93 - 0.96 g/cm3(ISO 1183, Method A) ENGINEERING MATERIAL SPECIFICATIONWSB-M4D733-A4 Printed copies are uncontrolled Copyright 2010, Ford G
7、lobal Technologies, LLC Page 2 of 5 (s) 3.5.3 Tensile Strength at Break, min 6.0 MPa (ISO R 527, 150 minimum x 10 x 4.0 +/-0.2 mm specimen, 50 mm/minute test speed) (s) 3.5.3.1 Elongation at Break, min 180% (Test Method according to para 3.5.3) (s) 3.5.4 Flexural Modulus, min 60 MPa (ISO 178, 80 x 1
8、0 x 4.0 +/- 0.2 mm specimen, 2 mm/minute test speed, 64 mm support span) 3.5.5 Shear Modulus at 23 C 23 - 35 MPa (ASTM D 4065, forced constant amplitude, fixed frequency of 1 Hz +/- 15%, strain level below 1%. Specimen approximately 60 x 10 x 4.0 +/- 0.2 mm cut from the center of specimen A. Specime
9、n length between clamps 35 - 40 mm. Soak time at each 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
10、) 3.5.6 Impact Strength, Izod, min (ISO 180/1A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens for each test) 3.5.6.1 At 23 +/- 2 C No Break3.5.6.2 At -40 +/- 1 C No Break3.5.6.3 At -40 +/- 1 C 3.4 kJ/m2The test specimens must be conditioned for minimum of 6 h at the above specified temperature pri
11、or to impact test. Low temperature testing shall be done within the cold box. (s) 3.5.7 Vicat Softening Temperature, min 60 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 0 after addition of 5 kg weight. At 50 N load) All speci
12、mens dry as molded. If not tested immediately after molding, specimens must be stored in a sealed, moisture-proof container filled with silica gel. ENGINEERING MATERIAL SPECIFICATIONWSB-M4D733-A4 Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 3 of 5 3.5.8 Heat Agi
13、ng Performance (ISO 188, except 150 +/- 50 air changes/h, 1000 h at 75 +/- 2 C. After heat aging test specimens are to be conditioned is a desiccator for 3 - 5 h at 23 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.5.8.1 Tensile Strength at Br
14、eak, +/- 25% % Change (Test Method per para 3.5.3) 3.5.8.2 Impact Strength, Izod Change No Break (Test Method per para 3.5.6.1, specimens to be notched before heat aging) 3.6 FOGGING (FLTM BO 116-03, 3 h at 100 C) Fog Number, min 90 Formation of clear film, droplets or crystals is cause for rejectio
15、n. 3.7 FLAMMABILITY (ISO 3795/SAE J369) Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x 100 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 fading or color ch
16、ange in excess of specified Gray Scale rating (AATCC Evaluation Procedure 1/ISO 105-A02). In addition, there shall be no cracking, crazing 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 For
17、d car polish (auto wax) after the outdoor exposure, at permission of the affected Product Development Materials Activity. All initial approvals will be based on the preliminary Weatherometer exposure, pending Florida and Arizona exposure results for final approval. 3.8.1 Xenon Arc Weatherometer Rati
18、ng 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) ENGINEERING MATERIAL SPECIFICATIONWSB-M4D733-A4 Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 4 of 5 3.8.2 12 months Florid
19、a 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 mm 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, sp
20、ecimen size: 150 x 100 mm, minimum, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) 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 2.1-5/ C (ASTM E 22
21、8 or TMA, temperature range -30 to +50 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 1.2 - 1.6% ENGINEERING MATERIAL SPECIFICATIONWSB-M4D733-A4 Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 5 of 5
