1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions 2006 10 19 N-STATUS Replaced by WSS-M2D382-B1; Inserted 3.0; Deleted 3.1,3.2,3.3,3.7,3.8,4 1990 11 02 Released EP00E01031541000 L. Rodigas Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 1 of 4 THERMOPLASTIC
2、 ELASTOMER (TPE), POLYOLEFIN, WSK-M4D712-A2 EPDM RUBBER MODIFIED, 50 DUROMETER D HARDNESS, EXTERIOR NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a rigid thermoplastic elastomer based on vulcanized EPDM rubber modified polyolefin with nominal 50 Durometer D har
3、dness and with added UV stabilization for exterior use 2. APPLICATION This specification was released originally for material used for bumper spoiler lips. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard R
4、equirements For Production Materials (WSS-M99P1111-A). 3.4 MOLDING COMPOUND 3.4.1 Melt Flow Rate 30 - 60 g/ (ISO 1133/ASTM D 1238, 230 C, 10 kg) 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-e
5、nd 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 prepared according to I
6、SO 294. No annealing allowed. 3.5.2 Density 0.93 - 0.96 g/cm3 (ISO 1183, Method A/ASTM D 792, Method A1) 3.5.3 Hardness Durometer D 40 - 52 (ISO 868/ASTM D 2240, 15 s dwell) ENGINEERING MATERIAL SPECIFICATION WSK-M4D712-A2 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC
7、 Page 2 of 4 3.5.4 Tensile Strength at Break, min 18 MPa (ISO R 527/ASTM D 638M, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/min test speed) 3.5.4.1 Elongation at Break, min 450% (Test Method according to para 3.5.4) 3.5.5 Flexural Modulus, min 340 MPa (ISO 178/ASTM D 790M, Method I, Procedure A,
8、80 x 10 x 4.0 +/- 0.2 mm specimen, 64 mm support span) 3.5.6 Shear Modulus at 23 C 130 - 210 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
9、s 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 +120 C temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance range shown on page 4. 3.5.7 Impact Strength, Izod, m
10、in (ISO 180, Method A/ASTM D 256, Method A, 63.5 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens for each test) 3.5.7.1 At 23 +/- 2 C No break 3.5.7.2 At -40 +/- 2 C 2.0 kJ/m2 3.5.7.3 At -10 +/- 2 C 10 kJ/m2 The test specimens must be conditioned for minimum of 6 h at the above specified temperature pr
11、ior 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. 3.5.8 Heat Deflection Temperature, min 45 C (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen. At 0.45 MPa) 3.5.9 Heat Aging Performance (ISO 188/ASTM D
12、 573, 150 +/- 50 air changes/h, 1000 h at 125 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.5.9.1 Tensile Strength at Break Change +/- 25% (Test Method per para 3.5.4) 3.5.9.2 Impact Strength, Izod, min No break (Test Method per para 3.5.7.1,
13、 specimens to be notched before heat aging) ENGINEERING MATERIAL SPECIFICATION WSK-M4D712-A2 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 3 of 4 3.6 WEATHERING RESISTANCE After exposure in accordance with 3.6.1, 3.6.2 and 3.6.3, the material shall show no fading
14、 or color change in excess of specified AATCC rating (AATCC Grey Scale for Evaluating Change in Color, 10 step). 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 polishing
15、with Ford car polish (auto wax) at permission of the affected Product Development Materials Activity. All initial approvals will be based on the preliminary Weatherometer exposure, pending Florida exposure results for final approval. 3.6.1 Xenon Arc Weatherometer Rating 4-5 (SAE J1960, 1980 kJ/m2 ex
16、posure minimum, specimen size: 150 x 100 mm minimum, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) 3.6.2 12 Months Florida Rating 4 (FLTM BI 160-01, 5 south, direct weathering inland, specimen size: 150 x 100 mm, minimum, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) 3.6.3 24 Months
17、Florida Rating tbd (FLTM BI 160-01, 5 south, direct weathering inland, specimen size: 150 x 100 mm, minimum, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this speci
18、fication. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 8.2-5/ C (ASTM D 696) 5.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 100 x 3.2 +/- 0.2 mm injection molded specimen) 5.2.1 Molding Shrinkage . After 48 h at 23 +/- 2 C 1.4 - 1.6% 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.2 - 0.5% . After 30 min at 120 C 0.2 - 0.5% ENGINEERING MATERIAL SPECIFICATION WSK-M4D712-A2 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 4 of 4
