1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Release/Revision1991 12 05 NB00I10043054135 Released J.D. Salow A.J. StockiWP 3948-a Page 1 of 3FABRIC, TEXTURED POLYESTER BACKING, 130 g/m2 WSB -M9H117 -BLOCK STITCHED1. SCOPEThe material defined by this specifica
2、tion is a textured polyesterfabric, uniformly needled of good commercial quality, thoroughly cleanedand free from waste.2. APPLI CATIONThis specification was released originally for a backing material forseating vinyl.3. REQUIREMENTS3.1 STATISTICAL PROCESSSuppliers must conform to the requirements o
3、f Ford Quality SystemStandard Q -101. A mutually acceptable Control Plan as describedtherein is required for material/source approval. Appropriatestatistical tools must be used to analyze process/product data sothat variation in the final product is continuously reduced.3.2 INFRARED SPECTROPHOTOMETR
4、Y AND/OR THERMAL ANALYSISFord Motor Company, at its option, may conduct infrared and/orthermal analysis of material/parts supplied to this specification.The IR spectra and thermograms established for initial approvalshall constitute the reference standard and shall be kept on fileat the designated m
5、aterial laboratory. All samples shall produceIR spectra and thermograms that correspond to the referencestandard when tested under the same conditions.3.3 CONDITIONING AND TEST CONDITIONSAll test values indicated herein are based on material conditionedin a controlled atmosphere of 23 +/ - 2 C and 5
6、0 +/ - 5 % relativehumidity for not less than 24 h prior to testing and tested underthe same conditions unless otherwise specified.3.4 COMPOSITION 100 % Textured(ASTM D 629) Polyester FiberENGINEERING MATERIAL SPECIFICATION WSB-M9H117-BWP 3948-b Page 2 of 33.5 FABRIC CONSTRUCTION3.5.1 Fabric Count,
7、Range(ASTM D 3887)LSL USL AVGWales/100 mm 21 25 23Courses/100 mm 35 41 383.5.2 Fabric Weight, Range, g/m2 122 135 129(FLTM BI 106 -01)3.6 BREAKING STRENGTH, N, min MD 220 - - - 299(ASTM D 1682, grab method, AMD 264 - - - 387305 mm/minute jaw speed)3.7 TEAR STRENGTH(trapezoid), N, min MD 53 - - - 84(
8、FLTM BN 122 -01) AMD 62 - - - 973.8 STRETCH AND SET, %(SAE J855)Stretch MD 88 124 104AMD 60 101 78Set MD 25 % of stretch, max,15 % average setAMD 25 % of stretch, max,17 % average set3.9 SHRINKAGE, %, max MD - - - 2.0 - - -(FLTM BN 105 -01) AMD - - - 2.0 - - -3.10 BURST STRENGTH, MPa, min 97 - - - 1
9、08(ASTM D 3887, average of 5 tests)3.11 HUMIDITY AGINGAfter exposure for 7 days at 98 +/ - 2 % relative humidity, 38 +/ -1 C, the construction shall show no evidence of mildew growth.3.12 ADDITIONAL REQUIREMENTSSpecific requirements for material and/or manufactured parts shallbe specified on the En
10、gineering drawing, Engineering partsspecification and/or performance specifications. All critical areaswith respect to these properties shall be clearly designated on theengineering drawing.3.13 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent inall characteris
11、tics to the material upon which approval wasoriginally granted.ENGINEERING MATERIAL SPECIFICATION WSB-M9H117-BWP 3948-b Page 3 of 3Prior to making any change in the properties, composition,construction, color, processing or labeling of the materialoriginally approved under this specification, whethe
12、r or not suchchanges affect the materials ability to meet the specificationrequirements, 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, test sample
13、s and a new code identificationare to be submitted with the request.Substance restrictions imposed by law, regulations or Ford, applyto the materials addressed by this document. The restrictions aredefined in Engineering Material Specification WSS -M99P9999 -A1,unless a different suffix (e.g., A2 or
14、 A3) is specified on theengineering document for the application.4. APPROVAL OF MATERIALSMaterials defined by this specification must have prior approval by theresponsible Materials Engineering activity. Suppliers desiring approvalof their materials shall first obtain an expression of interest from
15、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 authorized representative of the test facility,demonstrating full compli
16、ance 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 itsperformance 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.
