1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Action Changes1996 01 26 Activated Linda HessWP 3948-a Page 1 of 3 FELT, TWO COMPONENT POLYESTER WEB, WSS-M16H20-AHIGH CAPACITY AIR FILTRATION MEDIA1. SCOPEThe ma terial defined by this specification is a nonwoven compositecon
2、sis ting of one continuous air laid/thermal bonded polyester backed andone air laid polyester web whic h meets air filtration efficiency standardswhile achieving maximum air flow.2. APPLICATIONThis spe cification was released originally for material used as a highcapacity air filtration media.3. REQ
3、UIREMENTS3.1 QUALITY SYSTEM REQUIREMENTSMaterial suppliers and part producers must conform to Quality SystemRequirements, QS-9000. Material specification r equirements are to beused fo r initial qualification of materials. A Control Plan forong oing production verification is required. This plan mus
4、t bereviewed and approved b y the relevant Ford Materials activity and/orFor d Supplier Technical Assistance (STA) prior to production partssubmission. Appropriate statistical tools must be used to analyzepr ocess/product data and assure consistent processing of thematerials.Part producers using thi
5、s material in their products, must use Fordapproved materials and must conform to a process control plan whichhas been approved by STA and/or the relevant Materials Activity.3.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSISFord Motor Company, at its option, may conduct infrared and/ortherma l a
6、nalysis 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 laboratory. All samples sha ll produce IR spectraand thermograms that correspond to th
7、e reference standard when testedunder the same conditions.ENGINEERING MATERIAL SPECIFICATIONWSS-M16H20-AWP 3948-b Page 2 of 3 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 % relativehumidi
8、ty for not less than 24 h prior to testing and tested under thesame conditions unless otherwise specified.3.4 WEIGHT, min 400 g/m2(ASTM D 461)3.5 THICKNESS, min 3.35 mm(ASTM D 461)3.6 STRENGTH PROPERTIES3.6.1 Tensile Strength, N/50 mm, width, min(ASTM D 461)Machine Direction 235Across Machine Direct
9、ion 210. Original. Aged (22 h at 140 +/- 2 C)3.6.2 Bursting Strength, Mullen, min 690 kPa(ASTM D 461)3.7 AIR PERMEABILITY, min 68 cm3/cm2.s(ASTM D 737)3.8 AIR FILTRATION, Fine Dust Capacityat 10 kPa pressure drop(SAE J 726, 0.0372 m 2 sample flat sheet). Weight increase, nominal 68 g. % efficiency,
10、min 97 %3.9 FLAMMABILITY(ISO 3795/SAE J369)Burn Rate, max 100 mm/minute3.10 ADDITIONAL REQUIREMENTSSpecific requirements for material and/or manufa ctured parts shall bespecified on the Engineering drawing, Engineerin g parts specificationand/or performance specification. All critical areas with res
11、pect tothese properties shall be clearly designated on the engineeringdrawing.ENGINEERING MATERIAL SPECIFICATIONWSS-M16H20-AWP 3948-b Page 3 of 3 3.11 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent inal l characteristics to the material upon which approval wa
12、soriginally granted.Pri or to making any change in the properties, composition,constr uction, color, processing or labeling of the materialorig inally approved under this specification, whether or not suchchange s affect the materials ability to meet the specificationrequir ements, the Supplier shal
13、l 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 new code identification areto be submitted with the request.Substance restrictions imposed by law
14、, regulations or Ford, apply tothe materials addressed by this document. The restrictions aredefined in Engineering Materials Specification WSS-M99P9999-A1.4. APPROVAL OF MATERIALSMat erials defined by this specification must have prior approval by theresp onsible Materials Engineering activity. Sup
15、pliers desiring approvalof thei r materials shall first obtain an expression of interest from theaffec ted Purchasing, Design and Materials Engineering activity. Uponrequest, the Supplier shall submit to the affected Materials Engineeringactivity a completed copy of their laboratory test reports, si
16、gned by aqualified and authorized representative of the test faci lity, demonstratingful l compliance with all the requirements of this specification (testresults, 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.
