1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2011 03 01 No replacement named A. Pan, APAN Status 2006 07 19 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.8, 3.9 & 4 1995 04 25 Activated M. Masserant Printed copies are uncontrolled Copyright 2011, Ford Global Technologies, LLC Page 1 of
2、4 POLYETHYLENE, HIGH DENSITY (PE-HD), WSS-M4D931-A1 25% MICA FILLED BLOW MOLDING COMPOUND NOT TO BE USED FOR NEW DESIGN 1. SCOPE The materials defined by this specification are linear high density 25% mica filled polyethylene molding compounds with a medium flexural modulus material used for arm res
3、ts, and a higher flexural modulus material used for seat backs. Both are for covered applications as noted by the approved source list. 2. APPLICATION This specification was released originally for material used for blow molded or extruded seat belt sleeves. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS
4、 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), shall be met with data representing 3 sigma values. 3.4 MOLDING COMPOUN
5、D (s) 3.4.1 Melt Flow Rate 7.0 - 13.5 g/10 minutes (ISO 1133, 190 C, 2.16 kg) 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. The following dimensions are required: A. 150 min x 1
6、0 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 prepared according to ISO 294. No annealing allowed. 3.5.2 Density 1.07 - 1.21 g/cm (ISO 1183, Method
7、 A) ENGINEERING MATERIAL SPECIFICATIONWSS-M4D931-A1Copyright 2011, Ford Global Technologies, LLC Page 2 of 4 Printed copies are uncontrolled 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 b
8、e within tolerance range shown on page 4. (s) 3.5.3 Tensile Strength at Max Load, min 26 MPa (ISO R 527, 150 minimum x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/min test speed (s) 3.5.3.1 Elongation at Break, min 12% (Test Method according to para 3.5.3) (s) 3.5.4 Flexural Modulus, min 1.4 GPa (ISO 178, 8
9、0 x 10 x 4.0 +/- 0.2 mm specimen, 64 mm support span) 3.5.5 Shear Modulus at 23 C 750 - 1300 MPa (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 clamp
10、s 35-40 mm. Soak time at each temperature interval - 3 minutes minimum) (s) 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 10.0 kJ/m 3.5.6.2 At -40 +/- 1 C 5.3 kJ/m 3.5.6.3 At -20 +/- 2 C 5.7 kJ/mThe test specimens m
11、ust 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 conducted outside, but within 5 s. (s) 3.5.7 Heat Deflection Temperature, min 56 C (ISO 75, 120 x 10 x 4.0 +/- 0.2 mm
12、 specimen, 0.32 +/- 0.01 mm deflection. At 0.45 MPa) 3.5.8 Heat Aging Performance (ISO 188, except 150 +/- 50 air changes/h, 1000 h at 100 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) ENGINEERING MATERIAL SPECIFICATIONWSS-M4D931-A1Copyright 20
13、11, Ford Global Technologies, LLC Page 3 of 4 Printed copies are uncontrolled 3.5.8.1 Tensile Strength at Max Load Change +/- 25% (Test Method per para 3.5.3) 3.5.9.2 Impact Strength, Izod Change +/- 25% (Test Method per para 3.5.6.1, specimens to be notched before heat aging) 3.6 FOGGING (FLTM BO 1
14、16-03, 3 h at 100 C heating, 21 C cooling plate) Fog Number, min 80 Formation of a clear film, droplets or crystals is cause for rejection. 3.7 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. 5
15、. 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 11-5/ C (ASTM E 831 (TMA), temperature range -30 to +30 C) 5.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 100 x 3
16、.2 +/- 0.2 mm injection molded specimen) 5.2.1 Molding Shrinkage . After 48 h at 23 +/- 2 C 2.0% 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 1.0% 5.3 RECYCLING CODE PE-HD-P25 ENGINEERING MATERIAL SPECIFICATIONWSS-M4D931-A1Copyright 2011, Ford Global Technologies, LLC Page 4 of 4 Printed copies are uncontrolled
