1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions 2010 01 21 N-STATUS No replacement named J. Crist, NA 2003 05 14 Revised Specification completely revised & renumbered M. Masserant 1995 02 27 Activated K.D. Bruley Printed copies are uncontrolled Page 1 of
2、4 Copyright 2010, Ford Global Technologies, Inc. ETHYLENE/METHACRYLIC ACID IONOMER (EMA), MODIFIED, WSS-M4D934-A1 3% GLASS FIBER REINFORCED MOLDING COMPOUND, INTERIOR NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a 3% glass fiber reinforced, UV stable molding c
3、ompound based on modified ionomer (ethylene/methacrylic acid EMA). 2. APPLICATION This specification was released originally for material used for seat belt guides . 3. REQUIREMENTS 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys
4、Standard Requirements For Production Materials (WSS-M99P1111-A). 3.2 MOLDING COMPOUND (s) 3.2.1 Melt Flow Rate 1.2 - 2.2 g/10 minutes (ISO 1133, 190 C, 2.16 kg) (s) 3.2.2 Glass Fiber Content 3.3 - 4.8% (ASTM D 5630 ash or ISO 3451/1, glass fiber 750 +/- 25 C, test portion 2.5 - 3.0 g) Note: Ash resu
5、lt contains 1% zinc from the base resin. 3.3 MOLDED TEST SPECIMEN 3.3.1 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: ENGINEERING MATERIAL SPECIFICATION WSS-M4D934-A1 Pa
6、ge 2 of 4 Copyright 2010, Ford Global Technologies, Inc. A. 75 x 5 x 2 +/- 0.2 mm (Tensile bar is Type Iba from ISO 527-1 & 2) B. 80 x 10 x 4.0 mm +/- 0.2 mm C. 120 x 10 x 4.0 mm +/- 0.2 mm The specimens shall be prepared according to ISO 294. No annealing allowed. 3.3.2 Density 0.94 - 0.99 (ISO 118
7、3, Method A) (s) 3.3.3 Tensile Strength at Yield, min 15 MPa (ISO 527, 150 minimum x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/min test speed) (s) 3.3.4 Flexural Modulus, min 850 MPa (ISO 178, 64 mm support span) (s) 3.3.5 Impact Strength, Izod, min (ISO 180, Method A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 1
8、0 specimens for each test) 3.3.5.1 At 23 +/- 2 C 80 kJ/m23.3.5.2 At - 40 +/- 2 C 70 kJ/m 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, if not possible, test can be conducte
9、d outside, but within 5 s. (s) 3.3.6 Heat Deflection Temperature, min 35 C (ISO 75, 120 x 10 x 4.0 +/- 0.2 mm specimen, edgewise, at standard deflection of 0.32 +/- 0.01 mm. At 1.80 MPa) 3.3.7 Heat Aging Performance (ISO 188, except 150 +/- 50 air changes/h, 1000 h at 70 +/- 2 C. Unaged property val
10、ues shall be determined at the time of the aged properties determination) 3.3.7.1 Tensile Strength Change +/- 25% (Test Method per para 3.3.3) ENGINEERING MATERIAL SPECIFICATION WSS-M4D934-A1 Page 3 of 4 Copyright 2010, Ford Global Technologies, Inc. 3.3.7.2 Impact Strength, Izod Change +/- 25% (Tes
11、t Method per para 3.3.5.1, specimens to be notched before heat aging) 3.4 FLAMMABILITY (ISO 3795) Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x 100 x 1.0 +/- 0.1 mm with a smooth surface. 3.5 WEATHERING RESISTANCE After exposure in accordance with 3.5.1, 3.5.
12、2, and 3.5.3, 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 or other deterioration. A slight loss of gloss or chalking will be allowed provided an acceptable appearance ca
13、n be achieved by polishing with Ford car polish (auto wax) at permission of the affected Product Development Materials Activity. All initial approvals will be based on the preliminary Weatherometer exposure, pending Florida exposure results for final approval. 3.5.1 Xenon Arc Weatherometer, min Rati
14、ng 4 - 5 (AATCC Gray Scale) (SAE J1885, 601 kJ/m exposure, max. A part, part section, or surrogate part if possible, otherwise a test plaque. Plaque size 60 x 60 min, 2.0 +/- 0.1 mm thick, smooth surface, low gloss injection molded specimen) 3.5.2 12 months Florida, min Rating 4 - 5 (AATCC Gray Scal
15、e) (FLTM BI 160-01, 5 south, under PPG Herculite K, tempered safety glass, 3 mm thick. Specimen size 60 x 60 minimum, 2.0 +/- 0.1 mm thick, smooth surface low gloss injection molded specimen) 3.5.3 24 months Florida, min Rating 4 - 5 (AATCC Gray Scale) (FLTM BI 160-01, 5 south, under PPG Herculite K
16、 tempered safety glass, 3 mm thick. Specimen size 60 x 60 minimum, 2.0 +/- 0.1mm thick, smooth surface low gloss injection molded specimen) ENGINEERING MATERIAL SPECIFICATION WSS-M4D934-A1 Page 4 of 4 Copyright 2010, Ford Global Technologies, Inc. 3.6 FOGGING (FLTM BO 116-03, 3 h at 100 C heating,
17、21 C cooling plate) Fog Number, min 90 Formation of clear film, droplets or crystals is cause for rejection. 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 4.1 COEFFICIENT OF LINEAR THERMAL EXPANSION
18、9.82E-5/C (ASTM E 831 TMA, temperature range - 30 to + 30 C) 4.2 MOLD SHRINKAGE (ISO 294, approx. 150 x 100 x 3.2 +/- 0.2 mm injection molded specimen) 4.2.1 Molding Shrinkage . After 48 h at 23 +/- 2 C 0.65 - 1.09% 4.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.2 - 1.0% . After 30 min at 120 C .57 - 1.5% 4.3 HEAT DEFLECTION TEMPERATURE, min 60 C (ISO 75/120 x 10 x 4.0 +/- 0.2 mm specimen, at standard deflection of 0.32 +/- 0.01 mm. At 0.45 MPa) 4.4 MELT TEMPERATURE, min 132C (ISO 11357, Method C, 10 C/min heating rate) 4.5 RECYCLING CODE EMA-GF03
