1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions 2006 10 19 N-STATUS Replaced by WSS-M2D382-B1; Inserted 3.0; Deleted 3.1,3.2,3.3,3.8,3.9,4 1989 11 23 Released SM/EQ6050 TP L. Rodigas Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 1 of 4 THERMOPLASTIC ELA
2、STOMER (TPE) POLYOLEFIN, EPDM WSK-M4D712-A1 RUBBER MODIFIED 50 DUROMETER D HARDNESS 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 hardness. This gene
3、ral purpose material is suitable for extrusion, injection molding, blow molding, and calendering on standard thermoplastic processing equipment. 2. APPLICATION This specification was released originally for material used for stone deflectors, side moldings, casing cover on throttle cable assemblies,
4、 etc. 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). 3.4 MOLDING COMPOUND 3.4.1 Melt Flow Rate 20 - 30 g/ (ISO 1133/ASTM D 1238, 230 C, 10 kg) 10 mi
5、nutes 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 10 x 4.0 +/- 0.2 mm (Tensile Bar, ISO 3167) B. 120 x 10 x 4.0 +/- 0.2 mm
6、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 0.92 - 0.98 g/cm3 (ISO 1183, Method A/ASTM D 792, Method A1) 3.5.3 Hardness Durometer D 45 - 55 (ISO 868/A
7、STM D 2240, 15 s dwell) ENGINEERING MATERIAL SPECIFICATION WSK-M4D712-A1 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 2 of 4 3.5.4 Tensile Strength at Yield, 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
8、 Elongation at Yield, min 450% (Test Method according to para 3.5.4) 3.5.5 Flexural Modulus, min 350 MPa (ISO 178/ASTM D 790M, Method I, Procedure A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 64 mm support span) 3.5.6 Shear Modulus at 23 C 130 - 200 MPa (ASTM D 4065, forced constant amplitude, fixed freque
9、ncy 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 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 t
10、o +130 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, min (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 42 kJ/m2 3.5.7.2 At
11、 -40 +/- 2 C 1.5 kJ/m2 3.5.7.3 At -10 +/- 2 C 20 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, if not possible, test can be conducted outside, but within 5 s. 3.5.8 H
12、eat Deflection Temperature, min 40 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 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.
13、5.9.1 Tensile Strength at Yield Change +/- 25% (Test Method per para 3.5.4) 3.5.9.2 Impact Strength, Izod Change, max -25% (Test Method per para 3.5.7.1, specimens to be notched before heat aging) ENGINEERING MATERIAL SPECIFICATION WSK-M4D712-A1 Printed copies are uncontrolled Copyright 2006, Ford G
14、lobal Technologies, LLC Page 3 of 4 3.6 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. 3.7 FOGGING (FLTM BO 116-03) Fog Number, min tbd Formation of excessive amounts of clear film or droplets
15、 is cause for rejection. 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 8.2-5/ C (ASTM D 696) 5.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 100 x 3.2 +/- 0.2
16、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 0.3 - 0.5% . After 30 min at 120 C 0.3 - 0.5% ENGINEERING MATERIAL SPECIFICATION WSK-M4D712-A1 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 4 of 4
