1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Action Revisions1991 03 01 C01089482000 Released W. Scholz Conc. J. SchultWP 3948-a Page 1 of 5SEALER, POLYURETHANE, SOLVENT RELEASE, WSK-M4G245-BAIR DRYING1. SCOPE:The material defined by this specification is a solvent relea
2、se onecomponent sealer based on polyurethane. It cures at room temperature inthe presence of moisture.2. APPLICATION:This specification was released originally for dealer repair shops forthe repair of interior and exterior body joint seams. The material is tobe applied to dry, grease free and primed
3、 surfaces. After applicationcondition for at least 5 h at 23 +/- 2 C and 50 +/- 5 % relative humidity(based on an application thickness of max 3 mm) prior to painting.3. REQUIREMENTS:Note: Unless otherwise specified use:a) EC-coated test panels according to FLTM BI 120-01, Method C andb) test panels
4、 prepared according to FLTM BI 103-02, Method Bb, exceptonly EC-coated and spray primer.3.1 STATISTICAL PROCESSSuppliers must conform to the requirements of Ford Quality SystemStandard Q-101. A mutually acceptable Control Plan as describedtherein is required for material/source approval. Appropriate
5、statistical 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/orthermal analysis of material/parts supplied to this specifi
6、cation.The IR spectra and thermograms established for initial approvalshall constitute the reference standard and shall be kept on fileat the designated material laboratory. All samples shall produce IRspectra and thermograms that correspond to the reference standardwhen tested under the same condit
7、ions.ENGINEERING MATERIAL SPECIFICATION WSK-M4G245-BWP 3948-b Page 2 of 53.3 CONDITIONING AND TEST CONDITIONSAll test values indicated herein are based on material conditionedin a controlled atmosphere of 23 +/- 2 C and 50 +/- 5 % relativehumidity for not less than 24 h prior to testing and tested u
8、nderthe same conditions unless otherwise specified.3.4 FLASH POINT Above 25 C(ASTM D 56)3.5 COLOR White or as specified onEngineering Drawing3.6 SOLIDS, min 82 %(FLTM BV 150-10)3.7 ASH, max 14 %(FLTM BV 150-10)3.8 DENSITY AT 20 C 1.15 - 1.25 kg/L(ASTM D 1475)3.9 VISCOSITY AT 20 C(FLTM BV 103-01, noz
9、zle 2 mm diameter,pressure 2.8 bar)3.9.1 As Received 80 - 120 s3.9.2 After Ageing, max 140 s(14 d at 30 +/- 2 C)3.10 FLOW RATE AT 23 +/- 2 C No sagging(FLTM BV 153-01, Method A)Test specimen prepared according to section 3. Test 1 h aftermaterial application.3.11 COLD FLEXIBILITY AFTER AGINGNo crack
10、ing, no loss of adhesion, no chipping or blistering.Test Method:. Apply 280 x 30 x 2 mm ribbons of material under test to 300 x100 x 0.8 - 0.9 mm test panels prepared according to clause 3. Expose test specimens after 24 h at 23 +/- 2 C in a mechanicallyconvected air dry oven at 70 +/- 2 C for 120 h
11、. After cooling to RT expose test assemblies and bending fixture(see FLTM BV 153-04, except 100 mm mandrel) in a cold box at- 40 +/- 2 C for 4 h. While still in the cold box bend test assemblies within 2 saround the 100 mm mandrel through an angle of 90 degrees.ENGINEERING MATERIAL SPECIFICATION WSK
12、-M4G245-BWP 3948-b Page 3 of 53.12 ENVIRONMENTAL CYCLING TEST AFTER AGINGNo cracking, no separation from substrateTest Method:. Prepare test specimens according to clause 3.11, section 1 and 2of test method. After 24 h at 23 +/- 2 C the test specimens shall be subjectedthree times to the following c
13、ycle:16 h at 98 +/- 2 % RH and 38 +/- 2 C4 h at - 40 +/- 2 C4 h at 80 +/- 2 C. Evaluation according to FLTM BV 153-03, mandrel diameter 100 mm,angle of 90 deg within 2 s.3.13 PAINTABILITYNo staining, discolouration or other deleterious effects on thepaint after exposure to each of the following expo
14、sures:a) Fluorescent Sunlamp, min 500 h(FLTM BU 152-02)b) Florida Exposure, min 12 months(5 deg facing south, Miami, Florida)Specimen Preparation:. Apply 280 x 30 x 3 mm ribbons of sealer under test to 300 x 100x 0.8 - 0.9 mm test panels prepared according to FLTM BI 120-01,Method C and FLTM BI 103-
15、02, Method B. Condition for at least 5 h at room temperature and paint usingapproved/released repair paint systems. Condition for 24 h at room temperature and expose as specifiedunder a) and b) above.3.14 BRIDGINGThe material shall bridge a distance of 4 mm. The sagging heightshall not exceed 3 mm.E
16、NGINEERING MATERIAL SPECIFICATION WSK-M4G245-BWP 3948-b Page 4 of 5Test Method:. Apply a bead of material under test, 5 mm in diameter to a testfixture as outlined in FLTM BV 153-05 (treated in accordancewith FLTM BI 103-2, Method C, EC-coated) and conditioned for 24h at 23 +/- 2 C. Dismantle the te
17、st assembly and measure the sagging height inmm.3.15 WATER ABSORPTION, max 2 %(FLTM BV 153-07 substitute heattreatment by 48 h at RT)3.16 SHEAR STRENGTH AT 23 +/- 2 C, min 0.5 MPa(FLTM BV 154-03, Method B). Prepare specimen in accordance with section II, coatingthickness x = 2 mm. Substitute heat tr
18、eatment by 48 h at 23 +/- 2 C)3.17 PEEL STRENGTH AT 23 +/- 2 C, min 40.0 N/cm(FLTM BV 154-03, Method C). Prepare specimen according to section II, coating thickness x =2 mm. Substitute heat treatment by 48 h at 23 +/- 2 C)3.18 Storage Stability, min 6 months(From date of receipt at Ford Motor Compan
19、y)When stored between 5 C and 28 C in unopened drums out of directsunlight.3.19 QUALITYThe material shall be of uniform quality free from foreign materialand properties detrimental to normal production use. It shall notcause excessive soiling when handled in normal production use.3.20 ADDITIONAL REQ
20、UIREMENTSSpecific requirements for material and/or manufactured parts shallbe specified on the Engineering drawing, Engineering partsspecification and/or performance specifications. All criticalareas with respect to these properties shall be clearly designatedon the engineering drawing.ENGINEERING M
21、ATERIAL SPECIFICATION WSK-M4G245-BWP 3948-b Page 5 of 53.21 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent inall characteristics to the material upon which approval wasoriginally granted.Prior to making any changes in the properties, composition,construction,
22、 color, processing or labelling of the materialoriginally approved under this specification, whether 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
23、changesand obtain the written approval of the Materials Engineeringactivity. Test data, test samples and a new code identification areto be submitted with the request.Substance restrictions imposed by law, regulations or Ford isapplicable to the materials addressed by this document. Therestrictions
24、are defined in Engineering Material SpecificationWSS-M99P9999-A1, unless a different suffix (e.g., A2 or A3) isspecified on the engineering document for the application.4. APPROVAL OF MATERIALS:Materials defined by this specification must have prior approval by theresponsible Materials Engineering a
25、ctivity. Suppliers desiring approvalof 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 r
26、eports, signed by aqualified and 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. Inaddition to meeting the requirements of this specification, the materialswill be assessed for suitability for intended applications as part of theapproval process. Upon approval, the material will be added to theEngineering Material Approved Source List.
