1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 04 2012 01 16 N Status Replaced by WSS-M4D955-B K. Mueller, NA 2011 04 29 Revised Revised 3.5.3, 3.5.3.1, 3.5.4, 3.5.6.2 for single source K. Mueller, NA 1996 12 04 Activated K.D. Bruley; G.A. Molnar Controlled document at www.MATS Copyri
2、ght 2012, Ford Global Technologies, LLC Page 1 of 3 POLYETHYLENE (PE), HIGH DENSITY MOLDING WSS-M4D955-A COMPOUND NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a high density polyethylene molding compound. 2. APPLICATION This specification was released original
3、ly for material used for splash shields, air vents, thermoformed applications, etc. 3. REQUIREMENTS Material specification requirements are to be used for initial qualification of materials. 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the
4、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 COMPOUND (s) 3.4.1 Melt Flow Rate 7.4 - 12.2 g/10 minutes (ISO 1133, 190 C, 21.6 kg) 3.5 M
5、OLDED TEST SPECIMEN 3.5.1 Preparation of Test Specimens All tests specimens shall be prepared from compression molded sheets 200 x 200 x 4.0 +/- 0.2 mm unless otherwise specified. Preparation of compression molded sheets according to ISO 293, 180 - 200 C molding temperature, 15 +/- 2 C/minute coolin
6、g rate. The values of this specification are based on unannealed specimens. 3.5.2 Density 0.945 - 0.955 g/cm3 (ISO 1183, Method A) (s) 3.5.3 Tensile Strength at Yield, min 23 MPa (ISO 527-1 & ISO 527-2, 150 minimum x 10 x 4.0 +/- 0.2 mm specimen, test speed: 50 mm/minute) (s) 3.5.3.1 Elongation at Y
7、ield, min 9 % (Test Method according to para 3.5.3) ENGINEERING MATERIAL SPECIFICATION WSS-M4D955-A Copyright 2012, Ford Global Technologies, LLC Page 2 of 3 (s) 3.5.4 Flexural Modulus, min 860 MPa (ISO 178, 80 x 10 x 4.0 +/- 0.2 mm specimen, 2 mm/minute test speed, 64 mm support span) 3.5.5 Shear M
8、odulus at 23 C 585 - 875 MPa (ASTM D 5279, forced constant amplitude, fixed frequency of 1 Hz +/- 15%, strain level below 1%. Specimen approx. 60 x 10 x 4.0 +/- 0.2 mm. Specimen length between clamps 35 - 40 mm. Soak time at each temperature interval - 3 minutes minimum) Additionally, a shear modulu
9、s 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 granted on the original material approval and it shall constitute the reference standard for materials supplied to this specification and shall
10、be kept on file at the designated material laboratory and be available on request. (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 14 kJ/m2 3.5.6.2 At -40 +/- 1 C 5 kJ/m2 The test specimen must be conditioned for m
11、inimum of 6 hours 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) 3.5.7 Heat Deflection Temperature, min 35 C (ISO 75-1 & ISO 75-2, 80 x 10 x 4.0 +/- 0.2
12、mm specimen. flatwise, 0.34 +/- 0.1 mm deflection. At 1.80 MPa) 3.5.8 Heat Aging Performance (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) 3.5.8.1 Tensile Strength at +/- 10% Yield Change
13、 3.5.8.2 Impact Strength, -10% Izod Change (Test Method per para 3.5.6.1, specimens to be notched before heat aging) ENGINEERING MATERIAL SPECIFICATION WSS-M4D955-A Copyright 2012, Ford Global Technologies, LLC Page 3 of 3 3.6 FOGGING (SAE J1756, 3 h at 100 C heating, 21 C cooling plate, post test c
14、onditioning 1 h and 16 h) Fog Number, min 90 Formation of clear film, droplets or crystals is cause for rejection. 3.7 FLAMMABILITY (ISO 3795/SAE J369) 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. GENERAL INFORM
15、ATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 5 - 15-5/ C (ASTM E 696) 5.2 MOLD SHRINKAGE (ISO 2577, 150 x 100 x 32 +/- 0.1 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 3.0% After 30 minutes at 120 C 6.0% 5.3 MATERIAL IDENTIFICATION FOR RECYCLING PURPOSES PE-HD
