1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Release/Revision1988 08 01 B/031514 TP Completely Revised and Retyped1983 07 18 SM/EQ5378 TP ReleaseWP 3948-a Page 1 of 4 ADHESIVE, POLYAMIDE, HOT MELT, FILLED ESK-M2G270-A1. SCOPEThe material defined by this sp ec
2、ification is a hot melt adhesive based onpolyamide with high filler content.2. APPLICATIONThi s specification was originally released for material, used to bondhardboard parts of the ventilation air duct.3. REQUIREMENTS3.1 STATISTICAL PROCESSSupplie rs must conform to the requirements of Ford Qualit
3、y 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 the final product is continuously reduced.3.2 INFRARED SPECTROPHOTOMETRY AND/OR THE
4、RMAL 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 shallconst itute the reference standard and shall be kept on file at thedesignated material l
5、aboratory. 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 based on ma terial conditioned ina control led atmosphere of 23 +/- 2 C and 50 +/- 5
6、 % relativehumidity for not less than 24 h prior to testing and tested under thesame conditions unless otherwise specified.3.4 COLOUR black or as speci-fied on Engineer-ing drawing3.5 SOLIDS, min 99 %(FLTM BV 150-10)ENGINEERING MATERIAL SPECIFICATIONESK-M2G270-AWP 3948-b Page 2 of 4 3.6 ASH, max 44
7、%(FLTM BV 150-10)3.7 DENSITY 1.55 +/- 0.07 kg/L(ASTM D 816)3.8 SOFTENING POINT 148 +/- 7 C(ASTM E 28, Ring and Ball Apparatus)3.9 VISCOSITY(ASTM D 4402, Brookfield RVT/D Thermosel,Spindle No. SC4/27)160 C: 1 cycl/min 94000 - 126000 mPas170 C: 2.5 cycl/min 52000 - 73000 mPas180 C: 2.5 cycl/min 35000
8、- 53000 mPas3.10 SHEAR STRENGTH, min 4 MPa(FLTM EU-BU 51-1, Method A, Fig. 4) or break ofsubstrate3.10.1 Test Method1. Apply adhesive at an application temperatur e of 170 - 180C to a 25 x 10 mm area of a 25 x 75 mm non impregnatedcanvas fabric piece to a thickness of approx. 1 mm.2. Immediately aft
9、er adhesive application plac e the adhesiveside of the canvas specimen on a hard board panel of 60x 150 mm in production thickness (according to SM-2E4710-A) and roll the overlapped area once with a 2 kg rollerper ASTM D 1000.3. After 1 h at 23 +/ - 2 C test shear strength at a rate of25 mm/min.3.10
10、.2 After AgeingMaximum loss base on theoriginal measured value noneAge one specimen 14 day s at 90 +/- 2 C, another at 100 +/- 2C, 1 h at 23 +/- 2 C.3.10.3 After Environmental CyclingMaximum loss based on themeasured original value 15 %Specimen are exposed to 5 cycles of the following sequence16 h a
11、t 38 +/- 2 C and 98 +/- 2 % RH4 h at -40 +/- 2 C4 h at 90 +/- 2 CENGINEERING MATERIAL SPECIFICATIONESK-M2G270-AWP 3948-b Page 3 of 4 3.10.4 After Humidity AgeingMaximum loss based on themeasured original value 30 %(72 h at 38 +/- 2 C and 98 +/- 2 % RH,1 h at 23 +/- 2 C)3.10 QUALITYShall be a smooth,
12、 homogeneous mixture, free from foreign materialsand properties detrimental to normal production use. The materialmust be capable of regaining its initial physica l characteristics andperformance after recirculation or agitation prior to use.3.11 SUPPLIERS RESPONSIBILITYAll materials supplied to thi
13、s specification must be equivalent inal l characteristics to the material upon which approval wasoriginally granted.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 s
14、uchchange 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 data, t est samples and a
15、 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 WS S-M99P9999-A1, unlessa different suffix (e.g., A2 or A3) is s
16、pecified on the engineeringdocument for the application.4. APPROVAL OF MATERIALSMat erials defined by this specification must have prior approval by theresp onsible Materials Engineering activity. Suppliers desiring approvalof thei r materials shall first obtain an expression of interest from theaff
17、ec ted Purchasing, Design and Materials Engineering activity. Uponrequest, the supplier 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 testspecim ens for Ford
18、evaluation. Upon approval, the material will be addedto the Engineering Material Approved Source List.ENGINEERING MATERIAL SPECIFICATIONESK-M2G270-AWP 3948-b Page 4 of 4 5. GENERAL INFORMATIONThe information given below is provided for assistance and clarificationand does not represent requirement(s
19、) to this specification.5.1 STORAGE STABILITY 12 months(from date of receipt at FMC)The material must be st able during storage at temperatures between 5C and 32 C.5.2 RECOMMENDED OPERATION TEMPERATURE 170 - 180 C5.3 DEGRADATION POINT 190 CIf the temperature of the adhesive exceeds the d egradation
20、point, theadhesive will decompose and all physical properties become adverselyand permanently affected. The material is not to be used once thedegradation point has been exceeded.5.4 OPEN ASSEMBLY TIME 60 s(At an operation temperature of 170 - 180 C)Open assembly time is the max. time interval fro m initial applicationof the adhesive to the completion of the part assembly for bonding.
