1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2006 09 29 Revised Inserted 3.7.3, Revised 3.5, 3.7, 3.7.1, 3.7.2 C. Leslie 2006 04 13 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.8, 3.9 & 4 1992 07 29 Released NB00I10043054195 L.A. Graham Printed copies are uncontrolled Copyright 2006, F
2、ord Global Technologies, LLC Page 1 of 5 ACETAL (POM) COPOLYMER, COLOR PIGMENTED WSB-M4D840-A4 MOLDING COMPOUND, MELT FLOW RATE 1.8 - 4.0, INTERIOR 1. SCOPE The material defined by this specification is a thermoplastic acetal copolymer based on trioxane. 2. APPLICATION This specification was release
3、d originally for material used for interior trim 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 Req
4、uirements 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 MOLDED TEST SPECIMEN 3.4.1 Preparation of Test Specimens Unless otherwise specified all tests shall be carried out on in
5、jection 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 specimen A and/or B. The specimens shall be pre
6、pared according to ISO 294. No annealing allowed. 3.4.2 Density 1.38 - 1.43 g/cm (ISO 1183, Method A) ENGINEERING MATERIAL SPECIFICATIONWSB-M4D840-A4 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 2 of 5 3.4.3 Tensile Strength at Yield, min 58 MPa (ISO R 527, 150
7、minimum x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/min test speed 3.4.3.1 Elongation at Break, min 10% (Test Method according to para 3.5.3) 3.4.4 Flexural Modulus, min 2.4 GPa (ISO 178, 80 x 10 x 4.0 +/- 0.2 mm specimen, 2 mm/min test speed, 64 mm support span) 3.4.5 Shear Modulus at 23 C 715 - 1073 MPa
8、 (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 minimum). Additionally, a Shear
9、 Modulus vs. Temperature curve shall be plotted for -50 to +150 C temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance range shown on page 5. 3.4.6 Impact Strength, Izod, min (ISO 180/1A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens for each test) 3.4.6.1 At 23
10、+/- 2 C 3.8 kJ/m 3.4.6.2 At -40 +/- 2 C 3.0 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. 3.4.7 Heat Deflection Temperature, min (ISO 75, 120 x 10 x 4.0 +/- 0.2 mm spe
11、cimen, edgewise, 0.32 +/- 0.01 mm deflection) 3.4.7.1 At 1.80 MPa 87 C 3.4.7.2 At 0.45 MPa 150 C ENGINEERING MATERIAL SPECIFICATIONWSB-M4D840-A4 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 3 of 5 3.4.8 Heat Aging Performance (ISO 188, except 150 +/- 50 air chan
12、ges/h, 1000 h at 120 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.4.8.1 Tensile Strength at Change +/- 25% (Test Method per para 3.5.3) 3.4.8.2 Impact Strength, Izod Change +/- 25% (Test Method per para 3.5.6.1, specimens to be notched befor
13、e heat aging) 3.5 FOGGING (SAE J1756, 3 h at 100 C heating, 21 C cooling plate, post test conditioning 1 h and 16 h) Fog Number, min 80 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 materi
14、al approval is 355 x 100 x 1.25 +/- 0.1 mm with a smooth surface. 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 specified Gray Scale rating (AATCC Evaluation Procedure 1/ISO 105-A02). In addition, the
15、re 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 with mild detergents and water (ratio 5:95 by volume), or equivalent, after the Florida exposure. All initial approvals will be bas
16、ed on the preliminary Weatherometer exposure, pending Florida exposure results for final approval Not required for North America. 3.7.1 Xenon Arc Weatherometer - Rating 4 Required Worldwide except North America (SAE J1885, 1240.8 kJ/m exposure minimum, specimen size: 150 x 100 mm minimum, 3.2 +/- 0.
17、2 mm thick, molded in smooth polished mold) ENGINEERING MATERIAL SPECIFICATIONWSB-M4D840-A4 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 4 of 5 3.7.2 12 months Florida Rating 4 Not required for North America (FLTM BI 160-01, 5 south, under glass, specimen size:
18、150 x 100 mm, minimum, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) 3.7.3 Filtered Xenon Arc Weatherometer Rating 4 Required for North America (SAE J1885 modified (FLTM BO 116-01), 2481.6 kJ/m2 exposure min, specimen size: 150 x 100 mm min, 3.2 +/- 0.2 mm thick, molded in smooth polished mo
19、ld) 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 14.5-5/ C (ASTM E 831 TMA) 5.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 100 x 3.2 +/- 0.2 mm injection mol
20、ded specimen) 5.2.1 Molding Shrinkage . After 48 h at 23 +/- 2 C 1.8% 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.08% . After 30 min at 120 C 0.2% 5.3 WATER ABSORPTION 0.24% (ISO 62, 24 h, 50 +/- 1 mm diameter, 3.1 +/- 0.1 mm thick specimen) 5.4 HARDNESS, Rockwell M 77 (ISO 868) 5.5 RECYCLING CODE POM ENGINEERING MATERIAL SPECIFICATIONWSB-M4D840-A4 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 5 of 5
