1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions 2006 10 12 N-STATUS Replaced by WSS-M4D638-B 2005 11 17 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.8, 3.9 Corrected numbering 3.5.8 1989 09 29 Released SM/EQ 035825 L. Rodigas Printed copies are uncontrolled Copyright 2005, Ford Global Te
2、chnologies, LLC Page 1 of 4 POLYPROPYLENE (PP), HOMOPOLYMER WSK-M4D686-A MOLDING COMPOUND NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a heat stable thermoplastic molding compound based on polypropylene homopolymer. 2. APPLICATION This specification was releas
3、ed originally for material used for automotive parts such as tube drain, hose-windshield defroster, 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
4、 must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.4 MOLDING COMPOUND 3.4.1 Melt Flow Rate 0.3 - 3.5 g/ (ISO 1133/ASTM D 1238, 10 minutes 230 C, 2.16 kg) 3.5 MOLDED TEST SPECIMEN 3.5.1 Preparation of Test Specimens Unless otherwise specified all tests sh
5、all 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 specimen A and/or B. Th
6、e specimens shall be prepared according to ISO 294. No annealing allowed. 3.5.2 Density 0.885 - 0.92 g/cm3 (ISO 1183, Method A/ASTM D 792, Method A1) ENGINEERING MATERIAL SPECIFICATION WSK-M4D686-A Printed copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 2 of 4 3.5.3 Tensil
7、e Strength at Yield, min 27 MPa (ISO R 527/ASTM D 638M, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/min test speed) 3.5.3.1 Elongation at Yield, min 9% (Test Method according to para 3.5.3) 3.5.4 Flexural Modulus, min 1.1 GPa (ISO 178/ASTM D 790M, Method I, Procedure A, 80 x 10 x 4.0 +/- 0.2 mm sp
8、ecimen, 64 mm support span) 3.5.5 Shear Modulus at 23 C 500 - 750 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 clamps 35-40 mm. Soak time at ea
9、ch temperature interval - 3 minutes minimum) Additionally, a Shear Modulus vs. Temperature curve shall be plotted for -50 to +130 C temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance range shown on page 4. 3.5.6 Impact Strength, Izod, min (ISO 180, Method A/ASTM
10、D 256, Method A, 63.5 x 10 x 4.0 +/-0.2 mm specimen, 10 specimens for each test) 3.5.6.1 At 23 +/- 2 C 3.0 kJ/m2 3.5.6.2 At -40 +/- 2 C 1.5 kJ/m2 3.5.6.3 At 10 +/- 2 C 2.0 kJ/m2 The test specimens must be conditioned for minimum of 6 h at the above specified temperature prior to impact test. Low tem
11、perature testing shall be done within the cold box, if not possible, test can be conducted outside, but within 5 s. 3.5.7 Heat Deflection Temperature, min (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen) 3.5.7.1 At 1.82 MPa 47 C 3.5.7.2 At 0.45 MPa 80 C 3.5.8 Heat Aging Performance (ISO 188/A
12、STM D 573, 150 +/- 50 air changes/h, 1000 h at 130 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) ENGINEERING MATERIAL SPECIFICATION WSK-M4D686-A Printed copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 3 of 4 3.5.8.1 T
13、ensile Strength at Yield +/- 15% (Test Method per para 3.5.3) 3.5.8.2 Impact Strength, Izod Change, max -15% (Test Method per para 3.5.6.1, specimens to be notched before heat aging) 3.6 FLAMMABILITY (ISO 3795) Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x 10
14、0 x 1.0 +/- 0.1 mm with a smooth surface. 3.7 FOGGING (SAE J1756, 3 h at 100 C heating, 21 C cooling plate, post test conditioning 1 h and 16 h) Fog Number, min 80 Formation of clear film, droplets or crystals is cause for rejection. 5. GENERAL INFORMATION The information given below is provided for
15、 clarification and assistance in meeting the requirements of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 10 - 20-5/ 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 1.0 - 2.
16、0% 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 0.0 - 0.5% 5.3 HARDNESS, DUROMETER D 65 - 72 (ISO 868/ASTM D 2240, 15 s dwell) ENGINEERING MATERIAL SPECIFICATION WSK-M4D686-A Printed copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 4 of 4
