1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 03 2011 07 27 N Status No replacement named R. Harris, NA 2006 01 12 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.9, 3.10 & 4 1993 09 01 Released EP00E10258825000 WSK-M4D744-A2 L. Rodigas Printed copies are uncontrolled Copyright 2011,
2、Ford Global Technologies, LLC Page 1 of 7 ACETAL (POM) HOMOPOLYMER, COLOR PIGMENTED WSK-M4D744-A2 MOLDING COMPOUND, MELT FLOW RATE 11 - 17, INTERIOR ACETAL (POM) HOMOPOLYMER, COLOR PIGMENTED WSS-M4D744-A3 MOLDING COMPOUND, MELT FLOW RATE 19 - 31, INTERIOR ACETAL (POM) HOMOPOLYMER, COLOR PIGMENTED WS
3、S-M4D744-A4 MOLDING COMPOUND, MELT FLOW RATE 1.5 - 3.5, INTERIOR NOT TO BE USED FOR NEW DESIGN 1. SCOPE The materials defined by these specifications are color pigmented, UV stabilized acetal homopolymers based on formaldehyde, with melt flow rates from 1.5 to 31 g/10 minutes. 2. APPLICATION These s
4、pecifications were released originally for materials used for interior functional automotive applications such as window regulator handle knob, etc. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirem
5、ents 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 (ISO 1133, 190 C, 2.16 kg) WSK-M4D744-A2 11 - 17 g/10 minutes WSS-M4D744-A3 19 - 31
6、 g/10 minutes WSS-M4D744-A4 1.5 - 3.5 g/10 minutes 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. ENGINEERING MATERIAL SPECIFICATION WSK-M4D744-A2 WSS-M4D744-A3/A4 Printed copies
7、 are uncontrolled Copyright 2011, Ford Global Technologies, LLC Page 2 of 7 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/o
8、r B. The specimens shall be prepared according to ISO 294. No annealing allowed. 3.5.2 Density 1.39 - 1.44 g/cm3 (ISO 1183, Method A) (s) 3.5.3 Tensile Strength at Yield, min 59 MPa (ISO R 527, 150 minimum x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/min test speed) 3.5.3.1 Elongation at Break, min (Test M
9、ethod according to para 3.5.3) WSK-M4D744-A2 & WSS-M4D744-A3 10% WSS-M4D744-A4 25% (s) 3.5.4 Flexural Modulus, min 2.5 GPa (ISO 178, 80 x 10 x 4.0 +/- 0.2 mm specimen, 2 mm/min test speed, 64 mm support span) 3.5.5 Shear Modulus at 23 C (ASTM D 4065, forced constant amplitude, fixed frequency of 1 H
10、z +/- 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 Modulus vs. Temperature curve shall be plotted for -50 to +150 C
11、temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance range shown on page 7 (-A2 & -A3) and page 8 (-A4). WSK-M4D744-A2 & WSS-M4D744-A3 0.80 - 1.30 GPa WSS-M4D744-A4 0.83 - 1.40 GPa (s) 3.5.6 Impact Strength, Izod, min (ISO 180/1A, 80 x 10 x 4.0 +/- 0.2 mm specimen,
12、 10 specimens for each test) 3.5.6.1 At 23 +/- 2 C WSK-M4D744-A2 & WSS-M4D744-A3 4.4 kJ/m2 WSS-M4D744-A4 7.0 kJ/m2 ENGINEERING MATERIAL SPECIFICATION WSK-M4D744-A2 WSS-M4D744-A3/A4 Printed copies are uncontrolled Copyright 2011, Ford Global Technologies, LLC Page 3 of 7 3.5.6.2 At -40 +/- 2 C WSK-M4
13、D744-A2 & WSS-M4D744-A3 3.0 kJ/m2 WSS-M4D744-A4 6.0 kJ/m2 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. (s) 3.5.7 Heat Deflection Temperature, min (ISO 75, 120 x 10 x 4.0 +
14、/- 0.2 mm specimen, edgewise, 0.32 +/- 0.01 mm deflection) 3.5.7.1 At 1.80 MPa 80 C 3.5.7.2 At 0.45 MPa WSK-M4D744-A2 143 C WSS-M4D744-A3 & WSS-M4D744-A4 150 C 3.5.8 Heat Aging Performance (ISO 188, except 150 +/- 50 air changes/h, 1000 h at 90 +/- 2 C. After heat aging test specimens are to be cond
15、itioned in 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 Max Load Change +/- 20% (Test Method per para 3.5.3) 3.5.8.2 Impact Strength, Izod Change, max +/- 35% (Test Method per para 3.5
16、.6.1, specimens to be notched before heat aging) 3.6 FLAMMABILITY (ISO 3795/SAE J369) 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. 3.7 FOGGING (FLTM BO 116-03, 3 h at 100 C heating, 21 C cooling plate) Fog Number,
17、min 90 The formation of clear film, droplets or crystals is cause for rejection. ENGINEERING MATERIAL SPECIFICATION WSK-M4D744-A2 WSS-M4D744-A3/A4 Printed copies are uncontrolled Copyright 2011, Ford Global Technologies, LLC Page 4 of 7 3.8 WEATHERING RESISTANCE After exposure in accordance with 3.8
18、.1 and 3.8.2 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, there shall be no cracking, crazing or other deterioration. A slight loss of gloss or chalking will be allowed provided an acceptable appea
19、rance 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 based on the preliminary weatherometer exposure, pending Florida exposure results for final approval. 3.8.1 Xenon Arc Weatherometer Rating
20、4 (SAE J1885, 600 kJ/m2 exposure 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 (FLTM BI 016-01, 5 south, under glass, specimen size: 150 x 100 mm, minimum, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) 5.
21、GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of these specifications. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 10 - 12-5/ C (ASTM E 831 TMA, temperature range 20 to +100 C) 5.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 100
22、x 3.2 +/- 0.2 mm injection molded specimen) 5.2.1 Molding Shrinkage . After 48 h at 23 +/- 2 C 1.5 - 2.2% 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.15 - 0.25% . After 30 minutes at 120 C 0.2 - 0.4% ENGINEERING MATERIAL SPECIFICATION WSK-M4D744-A2 WSS-M4D
23、744-A3/A4 Printed copies are uncontrolled Copyright 2011, Ford Global Technologies, LLC Page 5 of 7 5.3 WATER ABSORPTION 0.20 - 0.35% (ISO 62, 24 h immersion, 50 +/- 1 mm diameter, 3.2 +/- 0.2 mm thick specimen) 5.4 HARDNESS, DUROMETER D 82 - 85 (ISO 868, 15 s dwell) 5.5 DIMENSIONAL STABILITY The ph
24、rase anneal after molding“ shall appear on engineering drawings when dimensional stability and/or improved frictional characteristics are engineering requirements. 5.6 RECYCLING CODE POM ENGINEERING MATERIAL SPECIFICATION WSK-M4D744-A2 WSS-M4D744-A3/A4 Printed copies are uncontrolled Copyright 2011, Ford Global Technologies, LLC Page 6 of 7 ENGINEERING MATERIAL SPECIFICATION WSK-M4D744-A2 WSS-M4D744-A3/A4 Printed copies are uncontrolled Copyright 2011, Ford Global Technologies, LLC Page 7 of 7
