1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2011 03 01 No replacement named A. Pan, APA N Status 2006 05 24 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.9, 3.10 & 4 1993 09 02 Released NB00I10043054280 L.A. Graham Printed copies are uncontrolled Copyright 2011, Ford Global Technologie
2、s, LLC Page 1 of 5 POLYETHYLENE (PE), LINEAR LOW DENSITY WSB-M4D880-A MOLDING COMPOUND, INTERIOR NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a linear low density polyethylene molding compound that is UV stabilized for interior applications. 2. APPLICATION Thi
3、s specification was released originally for material used for blow molded or extruded seatbelt sleeves. 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
4、). 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 0.6 - 1.0 g/10 minutes (ISO 1133, 190 C, 2.16 kg) 3.5 MOLDED TEST SPECIMEN 3.5.1 Preparation of Test Specimens Unless otherwise
5、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 (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 s
6、pecimen A and/or B. The specimens shall be prepared according to ISO 294. No annealing allowed. 3.5.2 Density 0.91 - 0.93 g/cm (ISO 1183, Method A) ENGINEERING MATERIAL SPECIFICATIONWSB-M4D880-ACopyright 2011, Ford Global Technologies, LLC Page 2 of 5 Printed copies are uncontrolled Additionally, a
7、Shear Modulus versus Temperature curve shall be plotted for -50 to +100 C temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance range shown on page 5. (s) 3.5.3 Tensile Strength at Max Load, min 12 MPa (ISO R 527, 150 minimum x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/mi
8、n test speed (s) 3.5.3.1 Elongation at Break, min 275% (Test Method according to para 3.5.3) (s) 3.5.4 Flexural Modulus, min 200 MPa (ISO 178, 80 x 10 x 4.0 +/- 0.2 mm specimen, 64 mm support span) 3.5.5 Shear Modulus at 23 C 112 - 168 MPa (ASTM D 4065, forced constant amplitude, fixed frequency of
9、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) (s) 3.5.6 Impact Strength, Izod, min (ISO 180/1A, 80 x 10 x 4.0 +/- 0.2 mm specimen,
10、10 specimens for each test) 3.5.6.1 At 23 +/- 2 C No break 3.5.6.2 At -40 +/- 1 C 0.38 kJ/m 3.5.6.3 At -20 +/- 2 C No break 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
11、 not possible, test can be conducted outside, but within 5 s. (s) 3.5.7 Heat Deflection Temperature, min 34 C (ISO 75, 120 x 10 x 4.0 +/- 0.2 mm 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 p
12、roperty values shall be determined at the time of the aged properties determination) ENGINEERING MATERIAL SPECIFICATIONWSB-M4D880-ACopyright 2011, Ford Global Technologies, LLC Page 3 of 5 Printed copies are uncontrolled 3.5.8.1 Tensile Strength at Max Load Change +/- 25% (Test Method per para 3.5.3
13、) 3.5.9.2 Impact Strength, Izod Change No break (Test Method per para 3.5.6.1, specimens to be notched before heat aging) 3.6 FOGGING (FLTM BO 116-03, 3 h at 100 C) Fog Number, min 90 Formation of clear film or droplets is cause for rejection. 3.7 FLAMMABILITY (ISO 3795) Burn Rate, max 100 mm/minute
14、 The specimen size required for material approval is 355 x 100 x 1.0 +/- 0.1 mm with a smooth surface. 3.8 WEATHERING RESISTANCE After exposure in accordance with 3.8.1 and 3.8.2 the material shall show no fading or color change in excess of specified Gray Scale rating (AATCC Evaluation Procedure 1/
15、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 washing with mild detergents and water (ratio 5:95 by volume), or equivalent, after the Florida exposure. All
16、 initial approvals will be based on the preliminary Weatherometer exposure, pending Florida exposure results for final approval. 3.8.1 Xenon Arc Weatherometer Rating 4-5 (SAE J1885, 1240 kJ/m exposure minimum, specimen size: 150 x 100 mm minimum, 3.2 +/- 0.2 mm thick, molded in smooth polished mold)
17、 3.8.2 12 months Florida Rating 4-5 (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) ENGINEERING MATERIAL SPECIFICATIONWSB-M4D880-ACopyright 2011, Ford Global Technologies, LLC Page 4 of 5 Printed copies are uncontroll
18、ed 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 11-5/ C (ASTM E 228 or TMA, temperature range -30 to +30 C) 5.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 10
19、0 x 3.2 +/- 0.2 mm injection molded specimen) 5.2.1 Molding Shrinkage . After 48 h at 23 +/- 2 C 3.0% 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 1.0% 5.3 RECYCLING CODE PE-LLD ENGINEERING MATERIAL SPECIFICATIONWSB-M4D880-ACopyright 2011, Ford Global Technologies, LLC Page 5 of 5 Printed copies are uncontrolled
