1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 01 15 N-STATUS No replacement named J. Crist, NA 2006 03 20 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.7, 3.8 & 4 1991 04 18 Released DF00E00107002028 J. B. Huebner Printed copies are uncontrolled Copyright 2010, Ford Global Technolog
2、ies, LLC Page 1 of 4 POLYBUTYLENE TEREPHTHALATE (PBT), 20% PTFE WSF-M4D809-A POWDER FILLED EXTRUSION MOLDING COMPOUND NOT TO BEUSED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a thermoplastic polyester extrusion molding compound based on polybutylene terephthalate, internal
3、ly lubricated with PTFE powder. 2. APPLICATION This specification was released originally for material used for speed control cable liners. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For
4、Production Materials (WSS-M99P1111-A). 3.4 MOLDING COMPOUND 3.4.1 Melt Flow Rate 4 - 9 g/10 minutes (ISO 1133/ASTM D 1238, 250 C, 2.16 kg) The material shall be dried for 4 h minimum at 110 C in a mechanical convection oven immediately preceding the test. 3.4.2 PTFE Powder Content 17 - 23% (FLTM BO
5、106-04, Procedure 1) 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
6、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 ISO 294. No annealing allowed. 3.5.2 Density 1.39 - 1.46 g/cm3(ISO 1183, Method A/ASTM D 792, Method A1) ENGINEERING MATERIAL SPECIFICAT
7、IONWSF-M4D809-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2 of 4 3.5.3 Tensile Strength at Max Load, min 36 MPa (ISO R 527/ASTM D 638M, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 5 mm/min test speed) 3.5.4 Flexural Modulus, min 2 GPa (ISO 178/ASTM D 790M, Method
8、 I, Procedure A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 64 mm support span) 3.5.5 Shear Modulus at 23 C 660 - 900 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 len
9、gth 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 to +240 C temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance range shown on page 4. 3.5.6 Impact
10、 Strength, Izod, min (ISO 180, Method A/ASTM D 256, Method A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens for each test) 3.5.6.1 At 23 +/- 2 C 2.9 kJ/m23.5.6.2 At -40 +/- 2 C 0.7 kJ/m2The test specimens must be conditioned for minimum of 6 h at the above specified temperature prior to impact tes
11、t. Low temperature 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 48 C 3.5.7.2 At 0.45 MPa 140 C 3.5.8 Heat Aging Performance
12、 (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 100 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.5.8.1 Tensile Strength at Max Load Change +/- 25% (Test Method per para 3.5.3) ENGINEERING MATERIAL SPECIFICATIONWSF-M4D809-A Printed
13、copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 3 of 4 3.5.8.2 Impact Strength, Izod Change +/- 25% (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 ap
14、proval is 355 x 100 x 1.6 +/- 0.1 mm with a smooth surface. 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 2.8-5/C (ASTM D 696) 5.2 MOLD SHRINKAGE (ISO 2577
15、, 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 1.8% 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.5% . After 30 min at 120 C 0.4% 5.3 MELT TEMPERATURE 214 C (ISO 1218/ASTM D 789, or DSC - ASTM E 794) 5.4 ELONGATION AT BREAK 9% (Test Method acc. to 3.5.3) ENGINEERING MATERIAL SPECIFICATIONWSF-M4D809-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 4 of 4
