1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Action Changes1990-05-02 EP00E01031535000 Released K. GerhardsWP 3948-a Page 1 of 5 ABS/PVC BLEND, VACUUM FORMABLE SHEET WSK-M4D740-A1. SCOPEThe material defined by this specification is an ABS/PVC blend sheet thatmay require
2、top coat to meet the durability requirements of thisspecification.2. APPLICATIONThis specification was released originally for material suitable for vacuumshaped interior instrument panel covers.3. REQUIREMENTSIn addition to the requirements listed herein, assemblies using thismaterial shall meet al
3、l the requirements of the appropriate assemblyperformance specification.3.1 STATISTICAL PROCESSSuppliers must conform to the requirements of Ford Quality SystemStandard Q-101. A mutually acceptable Control Plan as describedtherein is required for material/source approval. Appropriatestatistical tool
4、s must be used to analyze process/product data sothat variation in the final product is continuously reduced.3.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSISFord Motor Company, at its option, may conduct infrared and/orthermal analysis of material/parts supplied to this specification.The IR sp
5、ectra and thermograms established for initial approval shallconstitute the reference standard and shall be kept on file at thedesignated material laboratory. All samples shall produce IR spectraand thermograms that correspond to the reference standard when testedunder the same conditions.3.3 CONDITI
6、ONING AND TEST CONDITIONSAll test values indicated herein are based on material conditioned ina controlled atmosphere of 23 +/- 2 C and 50 +/- 5 % relativehumidity for not less than 24 h prior to testing and tested under thesame conditions unless otherwise specified.NOT TO BE USED FOR NEW DESIGN 201
7、1 N Status No replacement named. A Pan, APAENGINEERING MATERIAL SPECIFICATIONWSK-M4D740-AWP 3948-b Page 2 of 5 3.4 APPEARANCE(FLTM BI 109-01)The color, pattern and finish shall match the approved Design Centermaster sample, or shall be as specified on the engineering drawing.3.5 TEST SPECIMEN3.5.1 P
8、reparation of Test SpecimensUn less otherwise specified, all test shall be conducted onspecimens die cut from grained unformed sheets.3.5.2 Thickness 1.0 - 1.2 mm(ISO 4593/ASTM D 374, Method C)3.5.3 Density 1.14 - 1.22 g/cm3(ISO 1183, Method A/ASTM D 792, Method A1)3.5.4 Hardness, Durometer D 53 +/-
9、 5(ISO 868/ASTM D 2240,6 mm thick solidspecimens, 15 s delay)Parallel Perpendicular3.5.5 Tensile Strength at Break,MPa, min 18 18(ISO R 527, type 2/ASTM D 638M,type M-II, 100 mm/min test speed)3.5.5.1 Elongation at Break,%, min 170 180(Test acc. to para 3.5.5)3.5.5.2 Tensile Modulus at 50 %Elongatio
10、n, MPa, max 18 18(Test acc. to para 3.5.5)3.5.6 Tear Strength, kN/m, min 70 70(ISO 34, Method B, Procedure a/ASTM D 624, Die C, except 50 mm/min test speed)3.5.7 Flexibility at -30 C No cracks(FLTM BN 102-01, except 180 deg bend over19-20 mm diameter mandrel)3.5.8 Coating Adhesion(FLTM BI 106-01, Me
11、thod C)There shall be no separ ation of coatings from the base film.ENGINEERING MATERIAL SPECIFICATIONWSK-M4D740-AWP 3948-b Page 3 of 5 3.5.9 Heat Aging(ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 500 h at 120 C)Test Met hod: Apply production approved foam system on thereverse side of a sufficient
12、 number of sheet sections (foamth ickness min 6 mm) approx. 200 x 200 mm in size and storefor 50 0 h in a mechanical convection oven with fresh airsupply, maintained at 120 +/- 2 C.Aft er completion of the heat exposure condition the sheetsections for 24 h minimum at standard atmosphere.3.5.9.1 Colo
13、r Stability Rating 3After heat exposure, material shall not stain,exhibit color change in excess of specified AATCCrating (AATCC Gray Scale for Evaluating Change inColor, 10 step). In addition there shall not beany staining, spewing , loss of embossing or otherobjectionable change in appearance.3.5.
14、9.2 Elongation Change, max - 60 %(Test according to para 3.5.5,specimens to be die cut from exposed sheets)3.5.9.3 Flexibility No cracks(180 deg bend at -15 C over19-20 mm diameter mandrel)3.5.10 Crocking Rating 5(FLTM BN 107-01)3.5.11 H2S Staining Rating 5(FLTM AN 102-01)3.5.12 Soiling, max 15 %(FL
15、TM BN 112-01)3.5.13 Fogging(FLTM BO 116-03)Fog Number, min 70Formation of excessive amounts of clear film or droplets iscause for rejection.3.5.14 Abrasion Resistance(FLTM BN 108-02, 250 cycles, 500 g load, CS-10 wheels)The abraded area shall be compatible with the adjacent area.3.5.15 Odor, max Rat
16、ing 3(FLTM BO 131-01/SAE J1351)ENGINEERING MATERIAL SPECIFICATIONWSK-M4D740-AWP 3948-b Page 4 of 5 3.6 FLAMMABILITY(ISO 3795)Burn Rate, max 100 mm/minuteThe specimen size required for material approval is 355 x 100 x 1.1 +/- 0.1 mm with grained surface.3.7 WEATHERING RESISTANCEAfter ex posure in acc
17、ordance with 3.7.1, 3.7.2 and 3.7.3, themateria l shall show no color change in excess of specified AATCCrating (AATCC Gray Scale for Evaluating Change in Color, 10 step).In addi tion, there shall be no cracking, crazing, mildew growth orother deterioration. S pecimen bent around 19-20 mm diameter m
18、andrelshall not show any cracks when examined in bent condition.The mat erial shall not exhibit loss of adhesion (test according topara 3.5.8) after exposure according to 3.7.2.A slig ht loss of gloss or chalking will be allowed provided anacceptable appearance can be achieved by washing with mild d
19、etergentsand water (ratio 5:95 by volume).3.7.1 Xenon Arc Weatherometer Rating 4(SAE J1885, 488 kJ/m2 exposureminimum, specimen 150 x 300 mm3.7.2 12 months Florida & Arizona Rating 4(FLTM BI 160-01, south, under glass, variable angle, specimen 150 x 300 mm3.7.3 24 months Florida & Arizona Rating tbd
20、(FLTM BI 160-01, south, under glass, variable angle, specimen 150 x 300 mm3.8 ADDITIONAL REQUIREMENTSSpecific requirements for material and/or manufa ctured parts shall bespecified on the Engineering drawing, Engineerin g parts specificationand/or performance specifications. All critical areas with
21、respect tothese properties shall be clearly designated on the Engineeringdrawing.3.9 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent inal l characteristics to the material upon which approval wasoriginally granted.ENGINEERING MATERIAL SPECIFICATIONWSK-M4D740-A
22、WP 3948-b Page 5 of 5 Pri or to making any change in the properties, composition,constr uction, color, processing or labeling of the materialorig inally approved under this specification, whether or not suchchange s affect the materials ability to meet the specificationrequir ements, the Supplier sh
23、all notify Purchasing, Toxicology andthe affected Materials Engineering activity of the proposed changesand obtain the written approval of the Materials Engineeringactivity. Test data, t est samples and a new code identification areto be submitted with the request.Substance restrictions imposed by l
24、aw, regulations or Ford, apply tothe materials addressed by this document. The restrictions aredefined in Engineering Material Specification WS S-M99P9999-A1, unlessa different suffix (e.g., A2 or A3) is specified on the engineeringdocument for the application.4. APPROVAL OF MATERIALSMat erials defi
25、ned by this specification must have prior approval by theresponsible Materials Engineeri ng activity. Suppliers desiring approval ofthe ir materials shall first obtain an expression of interest from theaffec ted Purchasing, Design and Materials Engineering activity. Uponrequest, the Supplier shall s
26、ubmit to the affected Materials Engineeringactivity its own laboratory rep ort to the specification (test results, notnominal values), the material designation and code number, and testspecim ens for Ford evaluation. Upon approval, the material will be addedto the Engineering Material Approved Sourc
27、e List.5. GENERAL INFORMATIONThe information below is provided for clarification and assistance inmeeting the requirements to the specification.5.1 SCUFFING RESISTANCE(FLTM BN 108-04, A head, 200 cycles, 910 g load)The sc uffed area shall be compatible with the adjacend area.Increase in gloss shall not be a cause for rejection.
