1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions 2006 11 10 N-STATUS Replaced by WSS-M4D492-B1 2004 09 10 Activated K. D. Bruley Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 1 of 5 THERMOPLASTIC POLYOLEFIN ELASTOMER (TEO), WSS-M4D988-A COLOR PIGMENTED,
2、UV STABILIZED, LOW CLTE, FOR MOLDED-IN-COLOR APPLICATIONS, EXTERIOR NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a filled, weatherable thermoplastic molding compound. 2. APPLICATION This specification was released originally for material used for step pads wit
3、h improved scratch resistance. 3. REQUIREMENTS 3.1 STANDARD REQUIREMENTS 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)
4、, shall be met with data representing 3 sigma values. 3.2 MOLDING COMPOUND (s) 3.2.1 Melt Flow Rate 8 - 15 g/10 minutes (ISO 1133, 230 C, 2.16 kg) (s) 3.2.2 Mineral Filler Content 12 17% (ISO 2451-1, Method A, mineral filler, 3 h at 650 +/- 25 C, test portion 1 2 g) 3.3 MOLDED TEST SPECIMEN 3.3.1 Pr
5、eparation of Test Specimens Unless otherwise specified all tests shall be carried out on injection molded one-end gated test specimens. ENGINEERING MATERIAL SPECIFICATION WSS-M4D988-A Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 2 of 5 The following dimensions a
6、re required: A. 150 minimum x 10 x 4.0 +/- 0.2 mm (ISO 3167, Type 1A) B. 60 x 60 x 2.0 +/- 0.1 mm (ISO/DIS 294-3) C. 355 x 100 x 1.0 +/- 0.1 mm (ISO 3795) Test specimen A shall be molded using molding conditions defined in ISO 294. Specimens with shorter dimensions shall be cut from the center of th
7、e specimen A. No annealing allowed. 3.3.2 Density 0.99 - 1.05 g/cm (ISO 1183, Method A) (s) 3.3.3 Tensile Strength at Yield, min 17 MPa (ISO 527-1 & ISO 527-2, 150 minimum x 10 x 4.0 +/- 0.2 mm specimen, test speed: 50 mm/minute) (s) 3.3.4 Flexural Modulus, min 1.0 GPa (ISO 178, 80 x 10 x 4.0 +/- 0.
8、2 mm specimen, use center section of specimen A, 2 mm/min test speed, 64 mm support span) (s) 3.3.5 Impact Strength, Izod, min (ISO 180/1A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens for each test) 3.3.5.1 At 23 +/- 2 C 15 kJ/m2 3.3.5.2 At -40 +/- 1 C 1.0 kJ/m2 3.3.5.3 At 0 +/- 2 C 3.3 kJm2 The
9、 test specimens must be conditioned for a minimum of 6 h at the above specified temperature prior to impact test. Low temperature testing shall be done within the cold chamber, if not possible, test may be conducted outside, but within 5 seconds. (s) 3.3.6 Heat Deflection Temperature, min 50 C (ISO
10、75-1 & ISO 75-2, 80 x 10 x 4.0 +/- 0.2 mm specimen use center section of specimen A, flatwise, 0.34 +/- 0.1 mm deflection. At 1.80 MPa) ENGINEERING MATERIAL SPECIFICATION WSS-M4D988-A Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 3 of 5 3.3.7 Heat Aging Performan
11、ce (ISO 188, except 150 +/- 50 air changes/h, 1000 h at 120 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.3.7.1 Tensile Strength at Yield Change +/- 10% (Test Method per para 3.3.3) 3.3.7.2 Impact Strength, Izod Change +/- 10% (Test Method pe
12、r para 3.5.5.1, specimens to be notched before heat aging) 3.4 SCRATCH RESISTANCE Rating 1 (no visible (FLTM BN 108-13, 1.0 +/- 0.1 mm steel ball) scratches) at all loads 3.5 FLAMMABILITY (ISO 3795) Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x 100 x 2.0 +/-
13、0.1 mm with a smooth surface. 3.6 WEATHERING RESISTANCE After exposure in accordance with 3.6.1, 3.6.2, and 3.6.3, the material shall show no 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 de
14、terioration. A slight loss of gloss or chalking will be allowed provided an acceptable appearance can be achieved by washing and/or polishing with Ford car polish (auto wax) after the outdoor exposure, at permission of the affected Product Development Materials Activity. All initial approvals will b
15、e based on the preliminary Weatherometer exposure, pending Florida and Arizona exposure results for final approval. ENGINEERING MATERIAL SPECIFICATION WSS-M4D988-A Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 4 of 5 3.6.1 Xenon Arc Weatherometer Rating 4 - 5 wit
16、h (SAE J1960, 0.55 W/m2 Irradiance, at least 75% gloss specimen size: 60 x 60 minimum, retention 2.0 +/- 0.1 mm thick, smooth surface, high gloss injection molded specimen) Exposure Time, minimum 3000 h required Type “S“ Borosilicate Inner and Outer Filters 3.6.2 12 months Florida Rating 4 - 5 12 mo
17、nths Arizona (SAE J1976, 5 south, direct weathering inland, specimen size: 60 x 60 minimum, 2.0 +/- 0.1 mm thick, smooth surface, low gloss injection molded specimen) 3.6.3 24 months Florida Rating 4 24 months Arizona (SAE J1976, 5 south, direct weathering inland, specimen size: 60 x 60 minimum, 2.0
18、 +/- 0.1 mm thick, smooth surface, low gloss injection molded specimen) 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 4.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 8.7 -5/ C (ASTM E 831 TMA, temperatur
19、e range -30 to 100 C) 4.2 MOLD SHRINKAGE (ISO/DIS 294-3, 60 x 60 x 2.0 +/- 0.1 mm injection molded specimen) 4.2.1 Molding Shrinkage . After 48 h at 23 +/- 2 C 0.70 - 1.05% 4.2.2 Post Shrinkage (Separate specimens required for each test) . After 30 minutes at 120 C 0.97 - 1.47% ENGINEERING MATERIAL
20、SPECIFICATION WSS-M4D988-A Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 5 of 5 4.3 HEAT DEFLECTION TEMPERATURE, MIN 69 C (ISO 75-1 120 x 10 x 4.0 +/- 0.2 mm specimen use center section of specimen A, flatwise, 0.34 +/- 0.1 mm deflection. At 0.45 MPa) 4.4 SHEAR M
21、ODULUS AT 23 C 440 - 720 (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 clamps 35 - 40 mm. Soak time at each temperature interval - 3 minutes minimum
22、) Additionally, a Shear Modulus versus Temperature curve shall be plotted for -50 to +150 C temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance range granted on the original material approval and it shall constitute the reference standard for materials supplied to this specification and shall be kept on file at the designated material laboratory and be available on request. 4.5 RECYCLING CODE TEO-M15
