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1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Release/Revision1990 06 01 EP00E01031536000 Released P. KuntzeWP 3948-a Page 1 of 7 FLOCK SPRAYED FINISHED PARTS, LOW SUNLIGHT WSK-M98P8-A1EXPOSURE, INTERIORFLOCK SPRAYED FINISHED PARTS, MEDIUM SUNLIGHT WSK-M98P8-A

2、2EXPOSURE, INTERIORFLOCK SPRAYED FINISHED PARTS, HIGH SUNLIGHT WSK-M98P8-A3EXPOSURE, INTERIOR1. SCOPEThis specification defines the requirements for interior plastic parts withelectro statically sprayed flocking. The flock is retained by means of anon-staining adhesive.2. APPLICATIONThis s pecificat

3、ion was released originally to define the performancerequirements for sunroof louvers (sunblind).3. REQUIREMENTS3.1 STATISTICAL PROCESSSupplie rs must conform to the requirements of Ford Quality SystemStanda rd Q-101. A mutually acceptable Control Plan as describedth erein is required for material/s

4、ource approval. Appropriatestatist ical tools 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/ortherma l analysis of material/p

5、arts supplied to this specification.The IR spectra and thermograms established for i nitial approval shallconst itute the reference standard and shall be kept on file at thedesignated material lab oratory. All samples shall produce IR spectraand thermograms that correspond to the reference standard

6、when testedunder the same conditions.3.3 CONDITIONING AND TEST CONDITIONSThe part shall be conditioned for a minimum of 2 4 h at 23 +/- 2 C and50 +/- 5 % relative hum idity prior to test and tested under the sameconditions unless otherwise specified.ENGINEERING MATERIAL SPECIFICATIONWSK-M98P8-A1/A2/

7、A3WP 3948-b Page 2 of 7 3.4 APPEARANCE(FLTM BI 109-01)Colour, gloss and surface shall match the master sample approved bythe affected Product Development Materials Activity.3.5 BASE MATERIAL REQUIREMENTSThe chemical and physical nature of the adhesive and flock propertieson parts as supplied or part

8、s during normal use may cause skin or eyeirritat ion, allergic reactions or give rise to other toxic healthhazards.3.5.1 Supporting MaterialAs specified on Engineering Drawing3.5.2 FlockPolyamide 6: 6,7 dtexNominal fiber length: 1.5 mm or as specified on EngineeringDrawing3.5.3 AdhesiveShall be a su

9、itable non-staining type adhesive. It shall notbecome soft, tacky or brittle after any of the t ests outlinedin this specification.3.6 LOOSE FLOCK, max 0.8 g/m2(FLTM BN 108-08, Procedure A)All flocked parts shall be thoroughly cleaned to control the amountof loose flock to the above maximum level.3.

10、7 ADHESIONAdhes ion shall be tested on the original part and after Heat Agingaccording to para 3.8 and Environmental Cycling according to para 3.9after conditioning for 1 h at 23 +/- 2 C.3.7.1 Adhesive to substrateAny indication of chipping or brittleness of the flockedadhesive film shall be cause f

11、or rejection.Test Method: Using a scalpel or other sharp implement, cut2 strips, 50 mm long and 2 mm apart through theflock/ adhesive layer to create samples. Lift theflock/ad hesive layer away from the substrate at one end ofeach strip so that it can be easily grabbed. Then peel theflock/ad hesive

12、strip away from the substrate by hand. Theadhesive film shall not pull free more than 2 mm beforebreaking.ENGINEERING MATERIAL SPECIFICATIONWSK-M98P8-A1/A2/A3WP 3948-b Page 3 of 7 Adhes ives, primers or other surface treatments utilized toachieve adequate adhesion of the flock fiber to the substrate

13、sha ll not adversely affect the physical properties of thesubstrate material.3.7.1.1 Hot Adhesion (A2 & A3 only)Test Method: Test at the specified conditioningtemperature (para 3.7 ) within 5 s after opening ofoven door.3.7.2 Flock to AdhesiveThe quantity of fibers torn off must not be greater than

14、themaste r sample approved by the affected Product DevelopmentMaterials Activity.Te st Method: Apply a contrasting colored transparent tape(see para 5.1) approximately 25 mm wide onto a flockedsurface using firm pressure. Remove the tape by pulling backrapidly at 90 degrees to the surface.3.8 HEAT A

15、GINGThe fi nished part shall show no visible evidence of warpage,deformation, cracks, delamination or other failu res to an extent thatwoul d affect its use in the ultimate assembly. There shall be nolocal shrinkage where the part has been gated which would interferewith assembly to related parts, o

16、r affect its appearance.The fin ished part shall show no change in appearance when comparedwith the original part.The adhe sion of the individual surface coating shall meet therequirements of para 3.7.Test Methods: One of the following test methods shall be chosenaccording to the application and sho

17、wn on the Engineering Drawing.3.8.1 WSK-M98P8-A1Mount the finished part according to vehicle installation ona suit able fixture and place it in car position in amechanical convection oven maintained at 80 +/- 2 C for 7days. Evaluate after conditioning to 23 +/- 2 C.3.8.2 WSK-M98P8-A2Same as para 3.8

18、.1, exc ept maintain part at 90 +/- 2 C for 7days.3.8.3 WSK-M98P8-A3Same as para 3.8.1, except maintain part at 100 +/- 2 C for7 days.ENGINEERING MATERIAL SPECIFICATIONWSK-M98P8-A1/A2/A3WP 3948-b Page 4 of 7 3.9 ENVIRONMENTAL CYCLINGThe fin ished part shall show no evidence of warpage, deformation,c

19、racks, delamination of other failures to an ext ent that would affectits use in the ultimate assembly.The finished part shall show no changes in appearance when comparedwith the original finished part.The adhe sion of the individual surface coating shall meet therequirements of paragraph 3.7.Test Me

20、thods: One of the following test methods shall be chosenaccording to application and shown on the Engineering Drawing.3.9.1 WSK-M98P8-A1 only(FLTM BQ 104-07, Procedure 1)3.9.2 WSK-M98P8-A2/A3(FLTM BQ 104-07, Procedure 2)3.10 RESISTANCE TO LOW TEMPERATURE(FLTM BO 151-01, Method B,at - 30 +/- 2 CThe f

21、inished parts shal l be conditioned for 24 h at 80 +/- 2 C priorto cold exposure.The fin ished part shall show no evidence of warpage, deformation,cr acks, delamination or other failures to an extent that it wouldaffect its use in the ultimate assembly.The finished part shall show no changes in appe

22、arance when comparedwith the original finished part.The adhe sion of the individual surface coating shall meet therequirements of para 3.7.3.11 RESISTANCE TO WEATHERING(Applicable to parts using materials without previous weatheringapproval)After exposure the part shall show no fading or colour chan

23、ge inexcess of specified AATCC rating (AATCC Gray Scale for EvaluatingChange in Color, 10 step).All initial approvals w ill be based on the preliminary Weatherometerexp osure (para 3.11.1), pending Florida exposure results for finalapproval.ENGINEERING MATERIAL SPECIFICATIONWSK-M98P8-A1/A2/A3WP 3948

24、-b Page 5 of 7 3.11.1 Xenon Arc Weatherometer Rating 3(SAE J1885, except minimum irradiation)WSK-M98P8-A1 - 110 kJ/m2WSK-M98P8-A2 - 225 kJ/m2WSK-M98P8-A3 - 490 kJ/m2or as specified on the Engineering Drawing3.11.2 12 months Florida Rating 3(FLTM BI 160-01, 5 deg south, under glass)3.11.3 Dry Fade (E

25、AO only) (FLTM EU-BN 1-1, 120 SFH)Black Rating 5Other colors or as specified Rating 4on the Engineering Drawing3.12 RESISTANCE TO ABRASION (Taber)(FLTM BN 108-02, Procedure B, 500 g load,CS-10 wheel, 250 cycles)Resistance to abrasion shall be tested on the or iginal part and afterHeat Aging accordin

26、g to para 3.8 and Environmental cycling accordingto para 3.9 after conditioning for 1 h at 23 +/- 2 C.The a braded area shall be compatible with the adjacent unabradedarea.3.13 RESISTANCE TO SCUFFING(FLTM BN 108-10, 10 cycles or as specifiedon Engineering Drawing)There s hall be no excessive lifting

27、 of flock fibers from theadhesive.The scuffed area shall be equal to or better than that exhibited bythe mas ter sample approved by the affected Product DevelopmentMaterials Activity.3.14 RESISTANCE TO CROCKING(FLTM BN 107-01wet Rating 4dry Rating 4-53.15 RESISTANCE TO BLEEDING AND PERSPIRATION(FLTM

28、 AN 101-01)The part shall not show any change in color, gloss or softening ofsurface.ENGINEERING MATERIAL SPECIFICATIONWSK-M98P8-A1/A2/A3WP 3948-b Page 6 of 7 3.16 RESISTANCE TO SYSTHETIC PERSPIRATION(FLTM BI 113-03)The part shall not show any change in color, gloss or softening ofsurface.Test Met h

29、od: Lightly rub part with a smooth, clean tissue soakedwith mild detergents and water (ratio 5:95 by volume). Prior toexamination wash part with distilled water.3.17 RESISTANCE TO DETERIORATION AND MIGRATION STAINING(FLTM BN 103-01)The part shall not show any surface deterioratio n or change in colo

30、r,gloss or softening of the surface.3.18 ADHESIVE STAININGBlack Rating 4-5All other colors or as specified Rating 4The material shall show no evidence of fading when compared with theAATCC Gray Scale. It shall further show no change in color tone orevidence of spotting greater than the master sample

31、.Test Method: The part shall be placed in the fl uorescent sunlamp for150 h. Ex amination shall be done after cooling to 23 +/- 2 C.Equipment according to FLTM BO 115-01.3.19 FOGGING(FLTM BO 116-03)Fog Number, min 80or as specifiedon Eng. DrawingFormation of excessive amounts of clear film or drople

32、ts is cause forrejection.3.20 FLAMMABILITY(ISO 3795)Burn Rate, max 100 mm/minute3.21 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent inal l characteristics to the material upon which approval wasoriginally granted.ENGINEERING MATERIAL SPECIFICATIONWSK-M98P8-A1

33、/A2/A3WP 3948-b Page 7 of 7 Pr ior to making any changes in the properties, composition,co nstruction, color, processing or labelling of the materialorig inally approved under this specification, whether or not suchchange s affect the materials ability to meet the specificationrequir ements, the Sup

34、plier shall notify Purchasing, Toxicology andthe affected Materials Engineering activity of the proposed changesand obtain the written approval of the Materials Engineeringactivity. Test data, test samples and a new code identification areto be submitted with the request.Substance restrictions impos

35、ed by law, regulations or Ford isap plicable to the materials addressed by this document. Therestrictions are defined in Engineering Material SpecificationWSS-M99P9999-A1, unless a different suffix (e.g., A2 or A3) isspecified on the engineering document for the application.4. APPROVAL OF MATERIALSM

36、at erials defined 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 theaffect ed Purchasing, Design and Materials Engineering activity. Uponrequest, the su

37、pplier shall submit to the affected Materials Engineeringactivity its own laboratory rep ort to the specification (test results, notnominal values), the material designation and code number, and testspecimen s for Ford evaluation. Upon approval, the material will be addedto the Engineering Material

38、Approved Source List. 5. GENERAL INFORMATIONIf any of above tests cannot be carried out on the finished part due todimen sion, design etc. a respective note shall be made in the InitialSampl e Report and submitted for approvals to the Materials DevelopmentLaboratory, Product Engineering.5.1 TRANSPARENT TAPEUse 3M Transparent Tape #7740 for para 3.5.2.