1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Release/Revision1993 04 30 C10258815 Revised & Updated P Thomas1992 10 22 C10252558 Released P ThomasWP 3948-a Page 1 of 5 BARRIER, ACOUSTICAL, ETHYLENE VINYL ACETATE WSD-M5G57-A(E/VAC), MINERAL FILLED1. SCOPEThe m
2、ate rial defined by this specification is approximately 80 % mineralfilled ethylene vinyl acetate b ased thermoplastic elastomer. The materialmay be laminated on the visible surface.2. APPLICATIONThis spe cification was released originally for material used as a dashinsulator on Transit.3. REQUIREME
3、NTS3.1 STATISTICAL PROCESSSupplie rs must conform to the requirements of Ford Quality SystemStand ard Q-101. A mutually acceptable Control Plan as describedtherein is required for material/source approval. Appropriatestatist ical tools must be used to analyze process/product data sothat variation in
4、 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/parts supplied to this specification.The IR spectra and thermograms established for i nitial approval shallcons
5、t itute the reference standard and shall be kept on file at thedesignated material laboratory. All samples sha ll produce IR spectraand thermograms that correspond to the reference standard when testedunder the same conditions.3.3 CONDITIONING AND TEST CONDITIONSAll test values indicated herein are
6、based on ma terial conditioned ina control led 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.3.4 APPEARANCE(FLTM BI 109-01)The finished part shall match the master trim sample as approve
7、d bythe Design Department and/or as specified on engineering drawings.ENGINEERING MATERIAL SPECIFICATIONWSD-M5G57-AWP 3948-b Page 2 of 5 3.5 TEST SPECIMENS3.5.1 Preparation of Test SpecimensTests shall be done on flat sheet prior to forming unlessotherwise specified in test clause.3.6 ORIGINAL PROPE
8、RTIES3.6.1 Density(ASTM D 792 Method A1)Unlaminated 2300 +/- 230 kg/m3Laminated 2200 +/- 220 kg/m33.6.2 Tensile Strength, min(ASTM D 412, Die A,500 mm/minute test speed)WMD 1.8 MPaAMD 2.0 MPa3.6.3 Tear Strength, min(ISO 34, Method B, procedure (a)/ASTM D 624, Die C)WMD 13 kN/mAMD 14 kN/m3.6.4 Bend T
9、est No crackingTest Method: Cut 25 x 100 mm specimens from both directionsof t he part and bend 180 degrees around a 6.35 mm diametermandrel at room temperature. Examination shall be done onspecimens bent around 180 degrees from a distance of 30 cm,without magnification.3.6.5 Bend Test at 0 C No cra
10、ckingTe st Method: Per para 3.6.4 except test after exposingspecimens for 4 h at 0 +/- 2 C.3.7 PROPERTIES AFTER HEAT AGEING(ASTM D 573, 70 h at 70 +/- 2 C)3.7.1 Tensile Strength, min(ASTM D 412, Die A, 500 mm/minutetest speed)WMD 1.8 MPaAMD 1.8 MPaENGINEERING MATERIAL SPECIFICATIONWSD-M5G57-AWP 3948
11、-b Page 3 of 5 3.7.2 Tear Strength, min(ISO 34, Method B, procedure (a)/ASTM D 624, Die C)WMD 13 kN/mAMD 13 kN/m3.7.3 Bend Test No cracking(Test per para 3.6.4)3.8 SURFACE REQUIREMENTSTests under clause 3.8 shall be done on a flat e mbossed and laminatedarea.3.8.1 Resistance to Abrasion, Taber 700 c
12、ycles(SAE J948, 1000 g Load, CS10 Wheels)After test the specimens must not show any greater signs ofabr asion than the Master Sample approved by the MaterialsEngineering activity.3.8.2 Resistance to Fade, min(SAE J1885, AATCC Evaluation Procedure 1)Xenon Arc Exposure 112 kJ/m2 Rating 3The sa mple sh
13、all show no change in color tone, gloss, orevidence of spotting an d it shall be equal to or better thanthe Master Sample approved by the Materials Engineeringactivity.3.8.2.1 Flexibility after Light ExposureThe exposed test specimen (clause 3.8.2) must notshow any cracks when bent in accordance wit
14、h para3.6.4).3.8.3 Water StainingThe material shall not permanently change in colour or stainwhen distilled water is allowed to dry on its surface.Test Me thod: Cut 150 x 150 mm sample from the insulator.Make a 25 mm cut in the diagonal direction from each corner.Fold the edges and clip the corners
15、together to form a box.Add 25 mL of distilled water. Allow to air dry a t 23 +/- 2 C.Wash under tap water, wipe dry and observe for d iscolourationor stain.ENGINEERING MATERIAL SPECIFICATIONWSD-M5G57-AWP 3948-b Page 4 of 5 3.9 FOGGING(FLTM BO 116-03, 3 h at 100 +/- 2 C)Fog number, min 60The formatio
16、n of droplets or coalescence into a clear film is causefor rejection.3.10 ODOUR, max Rating 2(FLTM BO 131-01)3.11 FLAMMABILITY(ISO 3795)Burn Rate, max 100 mm/minute3.12 OZONE RESISTANCE, max Rating 0(FLTM BP 101-01, Procedure A, tensilespecimen, at 20 % elongation)3.13 SUPPLIERS RESPONSIBILITYAll ma
17、terials supplied to this specification must be equivalent inal l characteristics to the material upon which approval wasoriginally granted.Pri or to making any change in the properties, composition,const ruction, colour, processing or labelling of the materialorig inally approved under this specific
18、ation, whether or not suchchange s affect the materials ability to meet the specificationrequir ements, the Supplier shall notify Purchasing, Toxicology andthe affected Materials Engineering activity of the proposed changesand obtain the written approval of the Materials Engineeringactivity. Test da
19、ta, t est samples and a new code identification areto be submitted with the request.Substance restrictions imposed by law, regulations or Ford, apply tothe materials addressed by this document. The restrictions aredefined in Engineering Material Specification WSS-M99P9999-A1.4. APPROVAL OF MATERIALS
20、Mat 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 theaffec ted Purchasing, Design and Materials Engineering activity. Uponrequest, the S
21、upplier shall submit to the affected Materials Engineeringactivity a completed copy of their laboratory test reports, signed by aqualified and authorised representative of the test faci lity, demonstratingful l compliance with all the requirements of this specification (testresults, not nominal valu
22、es), the material designation a nd code number, andtes t specimens for Ford evaluation. Fords engineering approval of amateri al will be based on its performance to this specification and on anassessment of suitability for intended processes and/or applications. Uponapprov al, the material will be a
23、dded to the Engineering Material ApprovedSource List.ENGINEERING MATERIAL SPECIFICATIONWSD-M5G57-AWP 3948-b Page 5 of 5 5. GENERAL INFORMATIONThe information given below is provided for assistance and clarificationand does not represent a requirement of this specification.5.1 HARDNESS, DUROMETER A(ISO 868/ASTM D 2240, 15 second delay, plied-upspecimen. Hand held durometers shall not be used)Unlaminated 80 +/- 6Laminated 87 +/- 75.2 RECYCLING CODEE/VAC-M80
