1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Release/Revision1987 10 01 NE01E10000474000 Released Ed DudaWP 3948-a Page 1 of 4DIAPHRAGM CLOTH, POLYESTER - FLUOROCARBON WSE-M99H135-ARUBBER (FKM) COATED BOTH SIDES1. SCOPEThe materi al defined by this specificat
2、ion is a polyester cloth of goodquali ty and uniform composition coated on both sides with a good hightemperature, fuel, sour gas, and ozone resistant fluoroc arbon (FKM) rubber.It is usually furnished molded to a desired shape, but may be sheet stock.2. APPLICATIONThis spe cification was released o
3、riginally as the diaphragm for the fuelpressure regulator.3. REQUIREMENTS3.1 STATISTICAL PROCESSSupplie rs must conform to the requirements of Ford Quality SystemStand ard Q-101. A mutually acceptable Control Plan as describedtherein is required for material/source approval. Appropriatestatist ical
4、tools must be used to analyze process/product data sothat variation in the final product is continuously reduced.3.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSISFord Motor Company, at its option, may conduct infrared and/ortherma l analysis of material/parts supplied to this specification.The
5、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 the reference standard when testedunder the same conditions.3.3
6、 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 % relativehumidity for not less than 24 h prior to testing and tested under thesame conditions unless otherwise specified.3.4 CONSTRUCTIONThe ove
7、rall constructio n (base fabric and rubber) must be such as tomeet the requirements of this specification and the requirements ofthe engineering drawing.ENGINEERING MATERIAL SPECIFICATIONWSE-M99H135-AWP 3948-b Page 2 of 4 3.5 THICKNESS 0.20 +0.050/-0.025 mm(ASTM D 751)3.6 BURSTING STRENGTH, min 750
8、kPa(ASTM D 751)3.7 STIFFNESS(ASTM D 747, at 30 deg angle, 2.8E-3 N.mbending moment, 3.2 mm specimen span)Fill 5 - 15Warp 15 - 253.8 FLEX CRACK RESISTANCE(FLTM BN 102-02, except cut 25 x 125 mmspecimens)Non-pierced sample No cracks orFlex 2 000 000 cycles rubber separation3.9 ADHESION(ASTM D 751)Atte
9、mpt to separate coating from the fabric must always result in acohesive failure.3.10 OZONE RESISTANCE, max Rating 0(FLTM BP 101-01, Procedure A, 9.5 mm mandrel)3.11 PERMEATION(FLTM BZ 104-02)The elapsed time of the first bubble to break free from the surfaceon the specimen shall not be less than 15
10、min.3.12 HEAT AGED(ASTM D 573, 168 h at 150 +/- 2 C)3.12.1 Bursting Strength Change, max - 12 %(Test acc. to 3.6)3.12.2 Stiffness(Test acc. to 3.7)Fill 10 - 20Warp 15 - 253.12.3 Flex Crack Resistance No cracks or(Test acc. to 3.8, 2 000 000 cycles) rubber separation3.13 HEAT AGED(ASTM D 573, 1000 h
11、at 150 +/- 2 C)3.13.1 Bursting Strength Change, max - 35 %(Test acc. to 3.6)ENGINEERING MATERIAL SPECIFICATIONWSE-M99H135-AWP 3948-b Page 3 of 4 3.13.2 Stiffness(Test acc. to 3.7)Fill 15 - 25Warp 20 - 303.13.3 Flex Crack Resistance No cracks or(Test according to 3.8, 2 000 000 cycles) rubber separat
12、ion3.14 IMMERSION IN ASTM FUEL C(ASTM D 471, 70 h at 23 +/- 2 C)3.14.1 Bursting Strength Change, max - 12 %3.14.2 Stiffness(Test acc. to 3.7, except totaltesting time must not exceed 10 minafter removal from fuel)Fill 4 - 14Warp 12 - 203.14.3 Flex Crack Resistance No cracks or(Test acc. to 3.8, 2 00
13、0 000 cycles) rubber separation3.14.4 Adhesion(Test according to 3.9)Attem pt to separate coating from the fabric must alwaysresult in a cohesive failure.3.15 IMMERSION IN 85 % ASTM FUEL C + 15 % METHANOL(ASTM D 471, 70 h at 23 +/- 2 C)3.15.1 Thickness Change, max + 20 %3.16 LOW TEMPERATURE RESISTAN
14、CE(FLTM BN 102-01, Procedure A, 5 h at - 40 C)3.16.1 After Immersion in ASTM Fuel C No cracks3.17 IMMERSION IN OXIDIZED GASOLINE (SOUR GAS)(FLTM AZ 105-01, 120 h at 60 +/- 2 C eachcycle, PN-180)Test Method: Using reflux condensing equipment immerse the specimensin 180 PN (Peroxide Number) sour fuel
15、at 60 +/- 2 C for 48 to 72 h.Dry out in the convection oven for 4 h at 100 +/ - 2 C. Reimmerse thesame specimens in the 180 PN sour fuel at 60 +/- 2 C for additional48 to 72 h. The total time of both immersions sh all equal 120 h. Drysp ecimens for 4 h at 100 +/- 2 C. Repeat above for 2 cycles andde
16、termine the following properties.3.17.1 Bursting Strength Change, max - 18 %(Test acc. to 3.6)ENGINEERING MATERIAL SPECIFICATIONWSE-M99H135-AWP 3948-b Page 4 of 4 3.17.2 Stiffness(Test acc. to 3.7)Fill 6 - 16Warp 15 - 253.17.3 Flex Crack Resistance No cracks or(Test according to 3.8, 2 000 000 cycle
17、s) rubber separation3.17.4 Adhesion(Test according to 3.9)Attem pt to separate coating from the fabric must alwaysresult in a cohesive failure.3.17.5 Visual EvaluationNo su rface tackiness or cracks when folded flat againstitself.3.18 SOURCE IDENTIFICATIONEach diaphragm shall have the suppliers iden
18、tification markspermanently affixed.3.19 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent inal l characteristics to the material upon which approval wasoriginally granted.Pri or to making any change in the properties, composition,constr uction, color, processin
19、g 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 shall notify Purchasing, Toxicology andthe affected Materials Engineering activity of the proposed changesand obta
20、in 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, regulations or Ford, apply tothe materials addressed by this document. The restrictions aredefined in Engine
21、ering Material Specification WS S-M99P9999-A1, unlessa different suffix (e.g., A2 or A3) is specified on the engineeringdocument for the application.4. APPROVAL OF MATERIALSMat erials defined by this specification must have prior approval by theresponsible Materials Engineeri ng activity. Suppliers
22、desiring approval ofthe ir 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 its own laboratory rep ort to the specification (test results, notnominal values), the material designation and code number, and testspecim ens for Ford evaluation. Upon approval, the material will be addedto the Engineering Material Approved Source List.
