1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Released1994 12 16 Revised and Retyped, was 13 pages1985 01 17 B/001674 TP Revised 3.10, 3.15, 3.16, 41973 04 17 A/CX 6549 KP ReleasedWP 3948-a Page 1 of 8SOUND ABSORPTION FELT, MOLDED SK-M99G9503-ASOUND ABSORPTION
2、 FELT, MOLDED INACTIVE DELTA SK-M99G9503-BNOT TO BE USED FOR NEW DESIGN1. SCOPEThe material defined by this specification is a molded mildew resistantlaminate consisting of synthetic fiber needled felt, polythene sheetingand non-woven fiber padding bonded with synthetic resins.2. APPLICATIONThis par
3、t is used as a sound absorption pad in the passenger compartmentsuch as e.g. insulation pad instrument panel lower and/or as specifiedon the Engineering Drawing.3. REQUIREMENTSThe material shall be conditioned for a minimum of 24 h at a temperatureof 20 +/- 2 C and a relative humidity of 65 +/- 3 %
4、prior to test.3.1 CONSTRUCTIONThe material co nsists of a mildew resistant synthetic fiberneedled felt as top layer, a polythene sheeting and a non-wovenfiber padding consisting of natural and/or synthetic fibers bondedwith synthetic resins. The individual layers are laminated byheat and pressure in
5、to a molded component without a use ofadhesive.3.2 COLOR - NEEDLED FELTBlack or as specified on the Engineering Drawing.3.3 THICKNESS (mm)(ASTM C 167)Between 23 mm and 5 mm depending on degree of compression.3.4 Mass 1.5 - 2.0 kg /m2ENGINEERING MATERIAL SPECIFICATION SK-M99G9503-AINACTIVE DELTA SK-M
6、99G9503-BWP 3948-b Page 2 of 83.5 SPLITTING RESISTANCE, min 2 kN/m2Test Method: (See Figure 1)1) Three test specimens 100 x 100 mm shall be bonded to twospecimen holders each and conditioned for 24 hours atroom temperature (use adhesive S-M2G4610-A orequivalent).2) Determine splitting resistance in
7、a tensile machine at arate of pull of 25 mm/minute.3.6 TENSILE STRENGTH, min 50 NTest Method:1) Cut test specimens of 15 x 100 mm from finished partareas of maximum thickness.2) Determine tensile stre ngth with a tensile testingmachine. Distance between jaws 50 mm, separation rateof jaws 25 mm/minut
8、e.3.7 SOUND ABSORPTION According to(ASTM C 384, test specimen 18 +/- 1 mm thick Fig 2according to clause 3.3)Note: Five samples shall be tested from each material under test.Samples for measuring in the small tube shall be die cut from themiddle of the sample needed for the great tube after measurin
9、g thelatter.3.8 HEAT STABILITYThe finished part shall show no evidence of delamin ation, novisible shrinkage or distortion respectively, it shall not warp toan extent that would affect its use in ultimate assembly.Furthermore, it shall show no change in appearance when comparedwith the original unag
10、ed part.Test Method: The finished part or a representative section of thepart shall be mounted as in the vehicle and subjected to atemperature of 90 +/- 2 C in a mechanically convected air-dry ovenfor 3 hours. Examine after cooling to room temperature.ENGINEERING MATERIAL SPECIFICATION SK-M99G9503-A
11、INACTIVE DELTA SK-M99G9503-BWP 3948-b Page 3 of 83.9 ENVIRONMENTAL CYCLINGThe finished part shall show no evidence of delamination,noticeable shrinkage or distortion respectively, it shall not warpto an extent that would affect its use in ultimate assembly.Furthermore, it shall show no change in app
12、earance when comparedwith the original unaged part.Test Method: The finished part or a representative section of thepart shall be mounted as in the vehicle and subjected 2 times tothe following cycle in the sequence indicated below:16 h at 38 +/- 1 C and 98 +/- 2 % relative humidity8 h at 80 +/- 2 C
13、Examine after cooling to room temperature.3.10 MILDEW RESISTANCE AND ODORNo evidence of mildew development. The odor test shall be inaccordance with FLTM BO 131-01, maximum Rating 2.Test Method: Place a 100 x 100 mm sample of material soaked withdistilled water in a beaker glass of 1 litre capacity
14、and covertightly with a lid. Maintain at a temperature of 35 +/- 2 C for14 days. Remove lid and examine for evidence of mildewdevelopment.3.11 FLAMM ABILITY3.11.1 SK-M99G9503-A(ISO 3795)Burn Rate, max 250 mm/minuteDELTA 3.11.2 SK-M99G9503-ABurn Rate, max 100 mm/minuteIn order to comply with Federal
15、Motor Vehicle SafetyStandard No. 302, the materials, portions of components,and composites shall not burn or transmit a flame acrosstheir surface, at a rate of more than 100 mm/minute. Todemonstrate compliance, the sample size and method oftesting shall be in accordance with FLTM EU-BN 24-2.ENGINEER
16、ING MATERIAL SPECIFICATION SK-M99G9503-AINACTIVE DELTA SK-M99G9503-BWP 3948-b Page 4 of 83.11.3 Performance - Environm ental Ageing RequirementAll materials, portions of components, and compositesdefined by this specification that have not beentreated, modified or reformulated, and exceed a maximumb
17、urn rate of 75 mm per minute as specified by theFlammability Lot Sampling Plan of FLTM EU-BN 24-2, mustbe evaluated for permanency of the materials flameretardant properties per SK-M99P9500-A, Table 1according to the accelerated environmental ageingrequirements applicable to the basic material categ
18、oryof this particular specification.Any material, portions of components, and compositesdefined by this specification that have been treated,modified or reformulated to conform to Flammability LotSampling Plan of FLTM EU-BN 24-2, regardless of maximumburn rate, must be evaluated for both permanency
19、ofmaterials flame retardant properties and changes inmechanical, chemical and physical properties per SK-M99P9500-A, Table 1 applicable to the basic materialcategory of this particular specification.3.13 SURFACE RESISTANCEMaximum 0.03 g increase in weight.Test Method:1) Cut a 300 x 30 mm piece (in n
20、ominal thickness accordingto Engineering drawing) from the molded part under test.2) Weigh an approx 700 x 16 mm strip of hook tape accordingto SK-M3G9512-A, nearest to 0.01 g.3) Apply hook tape, hook of tape facing to the needled flatsurface of the finished part to an area of nominalthickness.4) Pr
21、ess hook tape to felt surface using a roller inaccordance with ASTM D 1000.5) Remove hook t ape by peeling at 180 deg at a rate of 300mm/minute.6) Reweigh hook tape nearest to 0.01 g and determine theincrease in weight.ENGINEERING MATERIAL SPECIFICATION SK-M99G9503-AINACTIVE DELTA SK-M99G9503-BWP 39
22、48-b Page 5 of 83.14 QUALITYThe material shall be of uniform quality free from foreignmaterial and properties detrimental to normal production use. Itshall not cause excessive soiling of handlers in normal productionuse.3.15 SUBSTANCE CONTROLLegal, health, safety and environmental constraints may ap
23、ply tothe materials which are submitted for approval to thisspecification. Refer to Engineering Material Specification SK-M99P9999-A.3.16 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent inall characteristics to the material upon which approval wasoriginally gr
24、anted.Prior to making any change in the properties, composition,construction, color, processing or labeling of the materialoriginally approved under this specification, whether or not suchchanges affect the materials ability to meet the specificationrequirements, the Supplier shall notify Purchasing
25、, Toxicology andthe affected Materials Engineering activity of the proposedchanges and obtain the written approval of the MaterialsEngineering activity. Test data, test samples and a new codeidentification are to be submitted with the request.Substance restrictions imposed by law, regulations or For
26、d, applyto the materials addressed by this document. The restrictions aredefined in Engineering Materials Specification WSS-M99P9999-A1.4. APPROVAL OF MATERIALSMa terials defined by this specification must have prior approval by theresponsible Materials Engineering activity. Suppliers desiring appro
27、valof their materials shall first obtain an expression of interest from theaffected Purchasing, Design and Materials Engineering activity. Uponrequest, the Supplier shall submit to the affected Materials Engineeringactivity a completed copy of their laboratory test reports, signed by aqualified and
28、authorized representative of the test facility,demonstrating full compliance with all the requirements of thisspecification (test results, not nominal values), the materialdesignation and code number, and test specimens for Ford evaluation.Fords engineering approval of a material will be based on it
29、sperformance to this specification and on an assessment of suitabilityfor intended processes and/or applications. Upon approval, the materialwill be added to the Engineering Material Approved Source List.ENGINEERING MATERIAL SPECIFICATION SK-M99G9503-AINACTIVE DELTA SK-M99G9503-BWP 3948-b Page 6 of
30、85. GENERAL INFORMATIONThe information given below is provide d for clarification and assistancein meeting the requirements of this specification.5.1 STORAGE STABILITY(From date of receipt at Ford Motor Company)6 months when stored between 5 C and 28 C.ENGINEERING MATERIAL SPECIFICATION SK-M99G9503-AINACTIVE DELTA SK-M99G9503-BWP 3948-b Page 7 of 8ENGINEERING MATERIAL SPECIFICATION SK-M99G9503-AINACTIVE DELTA SK-M99G9503-BWP 3948-b Page 8 of 8
