1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2006 09 29 Revised Paragraph 3.6, 3.6.1 Added 3.6.3. L. Schmalz 2005 10 27 Revised Format Updated 2002 11 14 Activated M. Masserant Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 1 of 4 POLYAMIDE 66 (PA66),
2、IMPACT MODIFIED MOLDING WSS-M4D666-A2 COMPOUND, INTERIOR 1. SCOPE The material defined by this specification is an elastomer modified polyamide 66 molding compound for molded in color applications. 2. APPLICATION This specification was released originally for material used for seat belt D-rings. NOT
3、ICE: This material absorbs and retains moisture. Part design and tolerances must accommodate changes in part dimensions and physical properties due to moisture absorption or loss in the service/assembly environment. 3. REQUIREMENTS Material specification requirements are to be used for initial quali
4、fication of materials. 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), shall be met with data
5、 representing 3 sigma values using the latest ISO test methods. 3.2 MOLDING COMPOUND (s) 3.2.1 Melt Temperature 258 - 268 C (ISO 11357, DSC or DTA at 10 C/min heating rate) 3.3 MOLDED TEST SPECIMEN 3.3.1 Preparation of Test Specimens Unless otherwise specified all tests shall be carried out on injec
6、tion 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 527) B. 80 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. The specimens shall be prepared
7、 according to ISO 294. No annealing allowed. ENGINEERING MATERIAL SPECIFICATIONWSS-M4D666-A2 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 2 of 4 3.3.2 Density 1.05 - 1.11 g/cm (ISO 1183, Method A) (s) 3.3.3 Tensile Strength at Yield, min 40 MPa (ISO 527, 150 min
8、imum x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/min test speed (unfilled), 5 mm/min (filled) (s) 3.3.3.1 Elongation at Yield, min 2% (Test Method according to para 3.3.3) (s) 3.3.4 Flexural Modulus, min 1.5 GPa (ISO 178, 80 x 10 x 4.0 +/- 0.2 mm specimen, 2 mm/min test speed, 64 mm support span) (s) 3.3.
9、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 50 kJ/m 3.3.5.2 At -40 +/- 2 C 9 kJ/m2The test specimens must be conditioned for a minimum of 6 h at the above specified temperature prior to impact test. Low temperature te
10、sting shall be done within the cold box. If not possible, the test can be conducted outside, but within 5 seconds. (s) 3.3.6 Heat Deflection Temperature, min (ISO 75, 80 x 10 x 4.0 +/- 0.2 mm specimen, 0.32 +/- 0.01 mm deflection) 3.3.6.1 At 1.80 MPa 50 C 3.3.7 Heat Aging Performance (ISO 188, 1000
11、h at 110 +/- 2 C. After heat aging test specimens are to be conditioned in a desiccator for 3 - 5 h at 23 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.3.7.1 Tensile Strength at Max Load Change +/- 25% (Test Method per para 3.3.3) heat aging)
12、 3.3.7.2 Impact Strength, Izod Change +/- 25% (Test Method per Para. 3.3.6, specimens notched before heat aging) ENGINEERING MATERIAL SPECIFICATIONWSS-M4D666-A2 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 3 of 4 3.4 FOGGING (SAE J1756, 3 h at 100 C heating, 21
13、C cooling plate, post test conditioning 1 h and 16 h) Fog Number, min 90 Formation of clear film, droplets, or crystals is cause for rejection. 3.5 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 surfac
14、e. 3.6 WEATHERING RESISTANCE After exposure in accordance with Para 3.6.1, 3.6.2 and 3.6.3, the material shall show no fading or 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 deterioration
15、when viewed with the unaided eye from a distance of 300 +/- 10 mm at 23 +/- 2 C. A slight uniform loss of gloss or chalking will be allowed provided an acceptable appearance can be achieved by washing with mild detergent (ratio 5:95 by volume), or equivalent after the Florida exposure. All initial a
16、pprovals will be based on the preliminary Weatherometer exposure, pending Florida exposure results for final approval-Not required for North America. 3.6.1 Xenon Arc Weatherometer, min Rating 4 (AATCC Gray Scale) Required Worldwide except North America SAE J1885, 601.6 kJ/m2exposure min, specimen si
17、ze: 150 x 100 mm min, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) 3.6.2 12 Months Florida, min Rating 4 (AATCC Gray Scale) Not required for North America (FLTM BI 160-01, 5 South, under glass, Specimen size: 150 x 100 mm min, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) ENGINEERIN
18、G MATERIAL SPECIFICATIONWSS-M4D666-A2 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 4 of 4 3.6.3 Filtered Xenon Arc Weatherometer Rating 4 Required for North America (SAE J1885 modified (FLTM BO 116-01), 1203.2 kJ/m2exposure min, specimen size: 150 x 100 mm min,
19、3.2 +/- 0.2 mm thick, molded in smooth polished mold) 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 9 - 12-5/C (ASTM E 831) 4.2 MOLD SHRINKAGE (ISO 294, ap
20、prox. 150 x 100 x 3.2 +/- 0.2 mm injection molded specimen) 4.2.1 Molding Shrinkage . After 48 h at 23 +/- 2 C 1.0 - 3.0% 4.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.00 - 0.5% . After 30 min at 120 C 0.04 - 1.2% 4.3 WATER ABSORPTION 0.5 - 1.5% (ISO 62, 24 h immersion, 50 +/- 1 mm diameter, 3.2 +/- 0.2 mm thick specimen) 4.4 RECYCLING CODE PA66
