1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2006 04 13 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.8, 3.9 & 4 1995 06 12 Revised Updated 3.8.1 M. Masserant 1992 07 29 Released NB00I10043054195 L.A. Graham Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC P
2、age 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 released originally for material used
3、 for interior trim 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 specification, identified by symbol(s
4、), 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 injection molded one-end gated test specimens. The following dimensions are required: A. 150 min x 10 x 4.0 +/- 0.2 mm (Ten
5、sile 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. 3.4.2 Density 1.38 - 1.43 g/cm (ISO 1183, Method A) 3.4.3 Tensile Stren
6、gth at Yield, min 58 MPa (ISO R 527, 150 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) ENGINEERING MATERIAL SPECIFICATIONWSB-M4D840-A4 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, L
7、LC Page 2 of 5 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 (ASTM D 4065, forced constant amplitude, fixed frequency of 1 Hz +/- 15%, strain level below 1%. Specimen approx. 60 x 1
8、0 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 Modulus vs. Temperature curve shall be plotted for -50 to +150 C temperature range, at 5 C minimum intervals. The plotted
9、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 +/- 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 spe
10、cified 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 specimen, 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 3.4.8 Heat Aging Performan
11、ce (ISO 188, except 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) 3.4.8.1 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
12、 3.5.6.1, specimens to be notched before heat aging) ENGINEERING MATERIAL SPECIFICATIONWSB-M4D840-A4 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 3 of 5 3.5 FOGGING (FLTM BO 116-03, 3 h at 100 C heating, 21 C cooling plate) Fog Number, min 80 Formation of clear
13、film, droplets or crystals is cause for rejection. 3.6 FLAMMABILITY (ISO 3795) Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x 100 x 1.25 +/- 0.1 mm with a smooth surface. 3.7 WEATHERING RESISTANCE After exposure in accordance with 3.8.1 and 3.8.2 the material
14、shall show no fading or 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 can be achieved by w
15、ashing with mild detergents and water (ratio 5:95 by volume), or equivalent, after the Florida exposure. All initial approvals will be based on the preliminary Weatherometer exposure, pending Florida exposure results for final approval. 3.7.1 Xenon Arc Weatherometer Rating 4 (SAE J1885, 900 kJ/m exp
16、osure minimum, specimen size: 150 x 100 mm minimum, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) 3.7.2 12 months Florida Rating 4 (FLTM BI 160-01, 5 south, under glass, specimen size: 150 x 100 mm, minimum, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) 5. GENERAL INFORMATION The inf
17、ormation 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 molded specimen) ENGINEERING MATERIAL
18、 SPECIFICATIONWSB-M4D840-A4 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 4 of 5 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
