1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Changes 2011 07 27 N Status No Replacement Named R. Harris, NA 1993 05 03 EP00E10258815000 Revised K. Gerhards 1988 12 15 SM/EQ1279 TP Released K. Gerhards WP 3948-a Page 1 of 5 POLYVINYL CHLORIDE (PVC), DRY BLEND SLU
2、SH WSK-M4D621-A MOULDED SKIN NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a UV and heat stabilized dry blend slush polyvinyl chloride moulded skin, which may be coated with a clear overspray. 2. APPLICATION This specificiation was released originally for mater
3、ial used as decorative moulded skin for interior instrument panel covers. 3. REQUIREMENTS 3.1 STATISTICAL PROCESS Suppliers must conform to the requirements of Ford Quality System Standard Q-101. A mutually acceptable Control Plan as described therein is required for material/source approval. Approp
4、riate statistical tools must be used to analyze process/product data so that variation in the final product is continuously reduced. 3.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSIS Ford Motor Company, at its option, may conduct infrared and/or thermal analysis of material/parts supplied to th
5、is specification. The IR spectra and thermograms established for initial approval shall constitute the reference standard and shall be kept on file at the designated material laboratory. All samples shall produce IR spectra and thermograms that correspond to the reference standard when tested under
6、the same conditions. 3.3 CONDITIONING AND TEST CONDITIONS All test values indicated herein are based on material conditioned in a controlled atmosphere of 23 +/- 2 C and 50 +/- 5 % relative humidity for not less than 24 h prior to testing and tested under the same conditions unless otherwise specifi
7、ed. 3.4 APPEARANCE (FLTM BI 109-01) The colour, pattern and finish shall match the approved Design Center master sample, or shall be as specified on the engineering drawing. ENGINEERING MATERIAL SPECIFICATION WSK-M4D621-A WP 3948-b Page 2 of 5 3.5 TEST SPECIMEN Unless otherwise specified, all tests
8、shall be conducted on specimens die cut from cured moulded skin. 3.5.1 Curing, min 30 minutes (FLTM BO 157-01) 3.5.2 Thickness 1.1 +/- 0.2 mm (ISO 4593/ASTM D 374, Method C) 3.5.3 Density 1.20 - 1.30 g/cm3 (ISO 1183 Method A/ASTM D 792, Method A1) 3.5.4 Hardness, Durometer A 75 +/- 5 (ISO 868/ASTM D
9、 2240, solid compression moulded specimens with smooth surfaces, 15 s delay) 3.5.5 Tensile Strength at Max Load, min 10 MPa (ISO R 527, type 2/ASTM D 638 M, type M-II, 100 mm/min test speed) 3.5.5.1 Elongation at Break, min 200 % (Test according to para 3.6.5) 3.5.5.2 Tensile Modulus at 50 % Elongat
10、ion, max 8 MPa 3.5.6 Tear Strength, min 40 kN/m (ISO 34, Method B, Procedure a/ASTM D 624, Die C, except 50 mm/minute test speed) 3.5.7 Flexibility at - 20 C No cracks (FLTM BN 102-01, except 180 deg bend over 19 - 20 mm diameter mandrel) 3.5.8 Coating Adhesion No chipping (FLTM BI 106-01, Method C,
11、 applicable for coated materials only) 3.5.9 Crocking Rating 5 (FLTM BN 107-01) 3.5.10 Soiling, max 15 % (FLTM BN 112-01) 3.5.11 Contact Staining (FLTM BN 103-01) The contact material shall not show any staining. Slight loss of gloss is permitted. ENGINEERING MATERIAL SPECIFICATION WSK-M4D621-A WP 3
12、948-b Page 3 of 5 3.5.12 Fogging (FLTM BO 116-03) Fog Number, min 80 3.5.13 Abrasion Resistance (FLTM BN 108-02, 250 cycles, 500 g load, CS-10 wheels) The abraded area shall be compatible with the adjacent unabraded area. 3.5.14 Scratch Resistance (FLTM BN 108-13, grain: Cordwain and/or equivalents,
13、 1 mm scratch balls, instrumental evaluation of 3.0 N scratch mark) Percentage of marking, max 30 % 3.5.15 Odor, max Rating 2 (FLTM BO 131-01/SAE J1351) 3.6 COMPATIBILITY The moulded PVC skin must be compatible with production approved foam system (for details see Approved Source List) 3.6.1 Compati
14、bility After Heat Ageing (ISO 188/ASTM D 573, 500 h at 120 C) Test Method: Apply production approved foam system on the reverse side of approx. 200 x 200 mm moulded skin sections (foam thickness min 6 mm). Closed mould should be used. Condition these specimens at 23 +/- 2 C and 50 +/- 5 % relative h
15、umidity for not less than 24 h and then store them for 500 h in a mechanically convected oven with fresh air supply (100 +/- 20 air changes per hour) maintained at 120 +/- 2 C. After completion of the heat exposure condition the foam backed moulded skin sections for min 24 h at standard atmosphere.
16、3.6.1.1 Colour Stability, Rating 3 After heat exposure, the material shall not exhibit colour change in excess of specified AATCC rating (AATCC Gray Scale for Evaluating Change in Colour, 10 step). In addition there shall not be any staining, spewing, loss of embossing or other objectionable change
17、in appearance. 3.6.1.2 Elongation at Break Change From Original Value, max - 50 % Test according to para 3.5.5.1. Specimens to be die cut from exposed skin sections with foam backing removed. ENGINEERING MATERIAL SPECIFICATION WSK-M4D621-A WP 3948-b Page 4 of 5 3.6.1.3 Aged Thermal Stability, min 20
18、 minutes (ISO R 182, Method A, test temperature 200 C, 1 g particulated test material) 3.6.1.4 Flexibility No cracks (180 deg bend at - 5 C over 19 - 20 mm diameter mandrel) 3.7 FLAMMABILITY (ISO 3795) Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x 100 x 1.2 +
19、/- 0.1 mm with grained surface. 3.8 WEATHERING RESISTANCE After exposure in accordance with 3.8.1, 3.8.2, 3.8.3, 3.8.4, and 3.8.5, the material shall show no colour change in excess of specified AATCC rating (AATCC Gray Scale for Evaluating Change in Colour, 10 step). In addition, there shall be no
20、cracking, crazing, mildew growth or other deterioration. Specimen bent around 19 - 20 mm diameter mandrel shall not show any cracks when examined in bent condition. A slight loss of gloss or chalking will be allowed provided an acceptable appearance can be achieved by washing with mild detergents an
21、d water (ratio 5:95 by volume), or equivalent at permission of the affected Product and Development Materials Activity. All initial approvals will be based on the preliminary Weatherometer exposure, pending Florida exposure results for final approval. 3.8.1 Xenon Arc Weatherometer Rating 4 (SAE J188
22、5, 489 kJ/m2 exposure minimum, specimen size 70 x 150) 3.8.2 12 Months Florida Rating 4 (FLTM BI 160-01, south, under glass, variable angle, specimen size 100 x 150) 3.8.3 12 Months Arizona Rating 4 (FLTM BI 160-01, south, under glass, variable angle, specimen size 100 x 150) 3.8.4 24 Months Florida
23、 Rating tbd (FLTM BI 160-01, south, under glass, variable angle, specimen size 100 x 150) 3.8.5 24 Months Arizona Rating tbd (FLTM BI 160-01, south, under glass, variable angle, specimen size 100 x 150) ENGINEERING MATERIAL SPECIFICATION WSK-M4D621-A WP 3948-b Page 5 of 5 3.9 ADDITIONAL REQUIREMENTS
24、 Specific requirements for material and/or manufactured parts shall be specified on the Engineering drawing, Engineering parts speci- fication and/or performance specifications. All critical areas with respect to these properties shall be clearly designated on the Engineering drawing. 3.10 SUPPLIERS
25、 RESPONSIBILITY All materials supplied to this specification must be equivalent in all characteristics to the material upon which approval was originally granted. Prior to making any change in the properties, composition, construction, color, processing or labeling of the material originally approve
26、d under this specification, whether or not such changes affect the materials ability to meet the specification requirements, the Supplier shall notify Purchasing, Toxicology and the affected Materials Engineering activity of the proposed changes and obtain the written approval of the Materials Engin
27、eering activity. Test data, test samples and a new code identification are to be submitted with the request. Substance restrictions imposed by law, regulations or Ford, apply to the materials addressed by this document. The restrictions are defined in Engineering Material Specification WSS-M99P9999-
28、A1. 4. APPROVAL OF MATERIALS Materials defined by this specification must have prior approval by the responsible Materials Engineering activity. Suppliers desiring approval of their materials shall first obtain an expression of interest from the affected Purchasing, Design and Materials Engineering
29、activity. Upon request, the Supplier shall submit to the affected Materials Engineering activity a completed copy of their laboratory test reports, signed by a qualified and authorized representative of the test facility, demonstrating full compliance with all the requirements of this specification
30、(test results, not nominal values), the material designation and code number, and test specimens for Ford evaluation. Fords engineering approval of a material will be based on its performance to this specification and on an assessment of suitability for intended process and/or application. Upon approval, the material will be added to the Engineering Material Approved Source List. 5. GENERAL INFORMATION The information below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 RECYCLING CODE PVC
