1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Action Changes1990 12 03 EP00E01031542000 Released W. Scholz Conc. J. SchultWP 3948-a Page 1 of 4 SEALER, POLYVINYL CHLORIDE FOAM PLASTISOL, WSK-M4G70-CHEAT CURING1. SCOPEThe mate rial defined by this specification is a polyvi
2、nyl chloride basedsealer which expands to a cellular structure when heat cured.2. APPLICATIONThis m aterial was released originally for material used for moldedapplications on molding retainers to seal against water and dust entry.3. REQUIREMENTS3.1 STATISTICAL PROCESSSupplie rs must conform to the
3、requirements of Ford Quality SystemStand ard Q-101. A mutually acceptable Control Plan as describedtherein is required for material/source approval. Appropriatestatist ical tools must be used to analyze process/product data sothat variation in the final product is continuously reduced.3.2 INFRARED S
4、PECTROPHOTOMETRY AND/OR THERMAL ANALYSISFord Motor Company, at its option, may conduct infrared and/ortherma l analysis 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
5、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 CONDITIONING AND TEST CONDITIONSAll test values indicated herein are based on materials conditionedin a co ntrolled atmosphere
6、 of 23 +/- 2 C and 50 +/- 5 % relativehumidity for not less than 24 h prior to testing and tested under thesame controlled conditions unless otherwise specified.3.4 COLOR As specified onengineering drawings3.5 TENSILE STRENGTH min 483 kPa(ASTM D 412, Die “C“, slab material)Elongation, min 150ENGINEE
7、RING MATERIAL SPECIFICATIONWSK-M4G70-CWP 3948-b Page 2 of 4 3.6 HARDNESS - DUROMETER “00“ 35 - 45(ASTM D 2240, instantaneous reading, slab material)3.7 HEAT RESISTANCE No evidence of cracking orplasticizer exudationTest Method: Molded slabs of material or the mo lded assemblies shallbe subj ected to
8、 a temperature of 120 +/- 2 C for 20 minutes in amechanical convection oven (simulated paint repair).3.8 PAINT STAIN No migration stain(FLTM BV 107-02)Test Method: Molded slabs or finished assembli es of molded materialon reta iners shall be mounted in intimate contact with a freshlyenameled paint p
9、anel. The assemblies shall be subjected to 72 h inthe f luorescent sunlamp cabinet and examined for migration staindevel opment. The paint stain requirement applies to parts whichcontact paint in assembly.3.9 COLD FLEXIBILITY No cracks orevidence of failureTest Method: Molded sl abs or finished asse
10、mblies of molded materialon retainers shall be conditioned for 24 h in a cold chambermaintained at - 29 C. The cured slab material shall be bent 180 degaround a 13 mm diameter mandrel. The molded assembly shall besubjected to the normal stresses encountered in normal installationprocedures using the
11、 standard tools for securing the retainers.3.10 RESISTANCE TO CORROSION, min 240 h(ASTM B 117)3.10.1 Molded Assembly (Sealer and molding retainer)No los s of adhesion or blistering of the sealer and noevidence of corrosion on the metal surface.3.11 OZONE DEGRADATION Rating 0(FLTM BP 101-01)3.12 FLAM
12、MABILITY(ISO 3795/SAE J369)Burn Rate, max 100 mm/minute3.13 FOGGING(FLTM BO 116-03)Fog Number, min 60Formation of excessive amounts of clear film or droplets is cause forrejection.ENGINEERING MATERIAL SPECIFICATIONWSK-M4G70-CWP 3948-b Page 3 of 4 3.14 STORAGE STABILITY min 6 months(From date of rece
13、ipt at Ford)When stored in sealed unopened containers out of direct sunlight atambient temperatures between 5 C and 32 C.3.15 QUALITYThe material shall be smooth homogeneous mixture free from foreignmaterials and properties detrimental to normal production use.3.16 ADDITIONAL REQUIREMENTSSpecific re
14、quirements for material and/or manufa ctured parts shall bespecified on the Engineering drawing, Engineerin g parts specificationand/or performance specifications. All critical areas with respect tothese properties shall be designated on the Engineering drawing.3.17 SUPPLIERS RESPONSIBILITYAll mater
15、ials supplied to this specification must be equivalent inal l characteristics to the material upon which approval wasoriginally granted.Pr ior to making any changes in the properties, composition,co nstruction, color, processing or labelling of the materialorig inally approved under this specificati
16、on, 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 Engineeringactivity. Test data,
17、 t est samples and a new code identification areto be submitted with the request.Substance restrictions imposed by law, regulations or Ford isapplic able to the materials addressed by this document. Therestrictions are defined in Engineering Material SpecificationWSS-M99P9999-A1, unless a different
18、suffix (e.g., A2 or A3) isspecified on the engineering document for the application.4. APPROVAL OF MATERIALSMat erials defined by this specification must have prior approval by theresponsible Materials Engineeri ng activity. Suppliers desiring approval ofthe ir materials shall first obtain an expres
19、sion 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,
20、and testspecim ens for Ford evaluation. Upon approval, the material will be addedto the Engineering Material Approved Source List. ENGINEERING MATERIAL SPECIFICATIONWSK-M4G70-CWP 3948-b Page 4 of 4 5. GENERAL INFORMATIONThe information given below is provided for clarification and assistancein meeti
21、ng the requirements of this specification.5.1 FLASH POINT, min 177 C(ASTM D 93)5.2 RECOMMENDED CURE CYCLEMolded Assemblies 5 minutes at 177 CSlab Material 10 minutes at 177 C5.3 SOLIDS, min 99 %(ASTM D 2834, except heat at 100 +/- 2 C for 3 h in a mechanical convection oven)5.4 VISCOSITY(FLTM BV 103-01, pressure flow at 207 kPa, 1.32 mm orifice)5.4.1 As Received 10 - 40 s5.4.2 Aged, max 65 s5.5 WEIGHT PER VOLUME 1.16 - 1.22 kg/L(ASTM D 816)
