1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Released1994 12 16 Revised and Retyped was: 10 pages1973 09 27 B4E/EV0931 KP ReleasedWP 3948-a Page 1 of 6SOUND DEADENER MAT, MOLDED SK-M99G9507-A1. SCOPEThe material defined by this specification is a heat resista
2、nt moldedpolyurethane elastomer and filler base deadener mat.2. APPLICATIONThe ma terial is mainly used for damping of structure borne noise on dashpanel in the engine compartment and/or for other applications as specifiedon the Engineering Drawing. The molded part should be fixed mechanicallyand wi
3、th adhesive SM-2G4610-A.3. REQUIREMENTS3.1 COLOR Grey to black3.2 DENSITY 2.4 +/- 0.2 g/cm3(ASTM D 792, Method A-1)3.3 THICKNESS 3.5 mm +/- 10 % or as specified(Slide gauge) on the Engineering drawing3.4 SHORE HARDNESS “A“ 75 +/- 5(ASTM D 2240, 15 s dwell)3.5 HEAT RESISTANCE No permanent deformation
4、Test Method:1) Place a 75 x 180 mm piece of material under test on a test panelas shown in the sketch below.2) Expose assembly for 1 hour in an air convection oven at 120 +/-2 C.3) Condition assembly for 1 hour at room temperature.ENGINEERING MATERIAL SPECIFICATIONSK-M99G9507-AWP 3948-b Page 2 of 63
5、.6 COLD RESISTANCENo crackingTest Method:1) Place a stee l ball of 20 mm dia, mass 225 g and a 100 x 100 mmpiece of material under test for 4 hours at - 30 +/- 1 C in a coldbox.2) Place th e test piece horizontally on a base plate and normal tothe direction of impact.3) While still in the cold box d
6、rop the steel ball to the middle ofthe test piece from a height of 1000 mm.3.7 MOISTURE ABSORPTION, max 15 %Test Method:1) Weigh a test piece of 100 x 100 mm nearest to 0.5 g.2) Condition the sample in suspen ded position at 98 +/- 2 % relativehumidity and 38 +/- 2 C for 24 hours.3) After 1 hour at
7、room temperature weigh the sample neare st to 0.5 gand d etermine increase of weight in percentage based on originalweight.ENGINEERING MATERIAL SPECIFICATIONSK-M99G9507-AWP 3948-b Page 3 of 63.8 TENSILE STRENGTH(ASTM D 412, Die C)3.8.1 Original, min 370 N/cm23.8.1.1 Elongation, min 90 %3.8.2 After H
8、umidity Ageing(48 h at 38 +/- 2 C and 98 +/- 2 %relative humidity)Maximum - 15 % based on measured original value.3.8.3 After Heat Ageing(48 h at 70 +/- 2 C 1 h atroom temperature)Maximum - 15 % based on measured original value.3.8.4 After Immersion in Engine Oil(48 h Oil No 1 ASTM D 471)Maximum - 1
9、5 % based on measured original value.3.9 TEAR STRENGTH, min 50 N(ASTM D 624, Die C)3.10 FLAMMABILITY S elf-extinguishing(FLTM EU-BN 24-2)3.11 DECAY RATE AT DIFFERENT TEMPERATURES(FLTM EU-BV 60-1)According to attached curve 1.3.12 DAMPING FACTOR AT DIFFERENT TEMPERATURES(FLTM EU-BV 60-2, except dimen
10、sions of teststrip 1 x 8.5 x 300 mm, coated length 250 mm)According to attached curve 2.3.13 QUALITYThe material shall be o f uniform quality free from release agents orother properties detrimental to normal production use.3.14 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification mus
11、t be equivalent inal l characteristics to the material upon which approval wasoriginally granted.ENGINEERING MATERIAL SPECIFICATIONSK-M99G9507-AWP 3948-b Page 4 of 6Pri or to making any change in the properties, composition,constr uction, color, processing or labeling of the materialorig inally appr
12、oved under this specification, 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 Engi
13、neeringactivity. Test data, 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 Materials Specification WSS-M99P9999-A1
14、.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 theaffec ted Purchasing, Design and Materials Engineering act
15、ivity. Uponrequest, the Supplier shall submit to the affected Materials Engineeringactivity a completed copy of their laboratory test reports, signed by aqualified and authorized representative of the test faci lity, demonstratingful l compliance with all the requirements of this specification (test
16、results, not nominal values), 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 added to the Engineering Material ApprovedSource List.ENGINEERING MATERIAL SPECIFICATIONSK-M99G9507-AWP 3948-b Page 5 of 6Curve 1: will be added later.ENGINEERING MATERIAL SPECIFICATIONSK-M99G9507-AWP 3948-b Page 6 of 6
