1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Action Changes1998 10 20 Revised Completely revised L. Daniv-Zarewych1996 12 09 Activated P. Thomas B. Chen D. Whyte N. KomatsuWP 3948-a Page 1 of 9PERFORMANCE, SEAT TRIM COVER ASSEMBLY WSS-M15P2-C1. SCOPEThis specification de
2、fines the performance requirements for automotiveseat cover assemblies.2. APPLICATIONThis specification was released originally for seat trim coverassemblies used to cover automotive seat cushions and backs and othercut and sew applications.3. REQUIREMENTSIn addition to the requirements listed herei
3、n all materials must meetperformance requirements referenced on engineering drawings. Fabric/fabric laminates must meet requirements of WSS-M8P18-A1/A3 and polymericfilm/laminate must meet requirements of WSS-M8P3-D1/D3. Leather mustmeet requirements of WSS-M1F17-C/F.In order to prevent premature se
4、am/needle hole failure, knitted fabricsshould not be sewn with needle size greater than 1.4 mm without priorapproval by Ford Materials Engineering.3.1 QUALITY SYSTEM REQUIREMENTSMaterial suppliers and part producers must conform to QualitySystem Requirements, QS-9000. Material specification requirem
5、entsare to be used for initial qualification of materials. A ControlPlan for ongoing production verification is required. This planmust be reviewed and approved by the relevant Ford Materialsactivity and/or Ford Supplier Technical Assistance (STA) prior toproduction parts submission. Appropriate sta
6、tistical tools mustbe used to analyze process/product data and assure consistentprocessing of the materials.Part producers using this material in their products, must useFord approved materials and must conform to a process control planwhich has been approved by STA and/or the relevant MaterialsActi
7、vity.ENGINEERING MATERIAL SPECIFICATION WSS-M15P2-CWP 3948-b Page 2 of 93.2 INFRARED SPECTROPHOTOMETRY 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
8、 initial approvalshall constitute the reference standard and shall be kept on fileat the designated material 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 val
9、ues 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 underthe same conditions unless otherwise specified.3.4 APPEARANCE(FLTM BI 109-01)The color, pattern, and finish shall mat
10、ch the approved CorporateDesign master sample, or shall be as specified on the engineeringdrawing.3.5 FOGGING*(SAE J1756, 3 h at 100 C heating, 21 C coolingplate, post test conditioning 1 and 16 h)Fog Number, min 70Formation of clear film, droplets or crystals is cause forrejection.* Leather shall m
11、eet requirements specified in the LeatherMaterial Specification.3.6 ODOR, Rating, max 2(FLTM BO 131-01/SAE J1351)3.7 ADDITIONAL REQUIREMENTS for materials exposed to processingoperations vinyl (PVC), flexible polymeric films/leather materialsand laminates exposed to heat, pressure or use of organic
12、solventsduring processing shall meet the following requirements.3.7.1 Thickness, range 0.80 - 1.30 mm(ASTM D 1813) Leather only3.7.2 Resistance To W Flex, min No evidence of crazing,(FLTM BN 102-02) lifting (peeling), orcrackingENGINEERING MATERIAL SPECIFICATION WSS-M15P2-CWP 3948-b Page 3 of 9Seati
13、ng Materials 10,000 cyclesCommercial Vehicle Seating ApplicationsOriginal Material 500,000 cyclesLeather, after 225.6 30,000 cycleskJ/m2After heat aging as 100,000 cyclesshown belowLeather, after heat 30,000 cyclesaging as shown below(7 days at 100 +/- 2 C, the oven used shall conform to ISO188/ASTM
14、 E 145 Type IIA, normal oven, 150 +/- 50 airchanges per hour, and provide a minimum oven space of 2L/100 cm2 of sample size for heat exposure tests.)3.7.3 Cold Flexibility at - 35 C(FLTM BN 102-01, preaged 7 days at80 +/- 2 C)Shall remain flexible and not crack when bent 180 degreesaround a 6.4 mm d
15、iameter mandrel or the mandrel specifiedin the individual Engineering Material Specification.3.7.4 Stiffness, leather, max(ASTM D 747, direct reading at 60 degangle with 0.01 N-m moment weight ona 0.7 N-m Tinius Olsen stiffness tester)Dir ect Scale Reading B C D E FAny direction, maxShallow or smoot
16、h grain 15 20 20 20 15Deep Grain 20 25 25 30 20Leather Types:B = Supple, Natural MilledC = Standard Wear, Natural MilledD = Standard Wear, Natural Milled,Tri-Crosslinked FinishE = High Wear, Natural MilledF = Nudo, Soft Hand, Natural MilledENGINEERING MATERIAL SPECIFICATION WSS-M15P2-CWP 3948-b Page
17、 4 of 9Test Method: Samples shall be randomly selected (anydirections) from a 0.37 m2 min area. The test specimenshall be 50 x 25 mm with 25 mm of the 50 mm dimensionclamped in jaw; 13 mm span from the clamp to the bendingplate. Conduct tests on 4 samples with uncoated side upand 4 samples with unco
18、ated side down. Record the averageresults obtained from the 8 scale readings (4 up, 4 down).Production material shall be similar in hand, whenmutually judged by the material supplier and the productmanufacturer, as material originally approved by theMaterials Engineering Activity.3.7.5 Color Propert
19、ies. Resistance to Fade, min(SAE J1885/SAE J2212, ISO 105-A02/AATCC Evaluation Procedure 1)225.6 kJ/m2 Rating 4488.8 kJ/m2 Rating 3Assembly shall exhibit no fiber deterioration or colortone change in excess of the above rating. Resistance to Heat Aging, min Rating 4(7 days at 100 +/- 2 C, ISO 105-A0
20、2/AATCC Evaluation Procedure 1)Assembly shall exhibit no fiber deterioration or colort one change in excess of the above rating.3.8 FLEX FOLD* 10,000 cycles(FLTM BN 102-04, Procedure “A“, 13.6 kg load,each direction, except test specimens to betaken from seat trim covers sewn per FSSproduction speci
21、fication. Required for cutand sew applications only.)This test applies to all seating materials except woven fabricsand leather.Shall exhibit no evidence of excessive needle hole enlargement orruns.In addition, vinyl coated fabric assemblies shall show no evidenceof objectionable needle hole elongat
22、ion, seam separation orfraying after flex-folding for 10,000 cycles.ENGINEERING MATERIAL SPECIFICATION WSS-M15P2-CWP 3948-b Page 5 of 93.9 SEAM STRENGTH, N, min(FLTM BN 119-01, except test specimens to betaken from seat trim covers sewn per FSSproduction specification. Required for cutand sew applic
23、ations only.) Not required forleather.Polyknit All Other Vinyl*445 400 350* In addition, the seam strength shall be equal to or greater than thatspecified in the material specifi cation.3.10 SEAM FATIGUE RESISTANCE, weft (circular), knitfabrics/laminates and vinyl coated fabrics/laminates, and leath
24、er/laminates seating surfaceonly*, max)(FLTM BN 106-02)Needle hole elongation after test 3 mm, with no“running“permitted* Required for cut and sew seating applications.3.11 FLAMMABILITY(ISO 3795/SAE J369)Burn Rate, max 100 mm/minute3.12 ADHESION, molded seat applications,N/50 mm, min(FLTM BN 151-05,
25、 Method “A“, specimenthickne ss reduced to 15 mm max)Laminate Foam To Foam Filling:As Received 7After Aging 7(Heat, cold, humidity and dry cleaning)After Autoclave Aging 7(ISO 2440/ASTM D 3574, Test J2, 5 h at120 C and 3 h at 115 C)ENGINEERING MATERIAL SPECIFICATION WSS-M15P2-CWP 3948-b Page 6 of 93
26、.13 STAINING(FLTM BO 115-01)Select a relatively flat area of the finished part. Cut out a 50 x50 x 10 mm section with the fabric forming the larger side. Coverthis side with white vinyl Accessory Test Material according toFLTM BN 103-01 with the glossy side uppermost and stapled inplace. Expose for
27、150 h with the vinyl side facing the light at adistance of 300 mm.3.14 SOILING and CLEANABILITY, min(FLTM BN 112-08, ISO 105-A02/AATCC Evaluation Procedure 1)After Cleaning, min Rating 33.15 RESISTANCE TO CLEANING AGENTS, Rating 4max discoloration(FLTM BN 107-01, 10 cycles)Test procedure: Substitute
28、 the leather for the textile material.Saturate white cotton cloth with the cleaners listed. Evaluationaccording to the AATCC Evaluation Procedure 3 (ChromaticTransference Scale).Cleaners1) Window cleaner with ammonia E4AZ-19C507-AA *2) All Purpose Cleaner E0AZ-19526-AA * or E8AZ-19623-AA*3) Isopropy
29、l Alcohol/Water 50 % v/v (5 cycles, Rating 3)*or Ford Motor Company Recommended Equivalents3.16 COMPATIBILITYAll materials and processing shall be compatible. Incompatible materials/processing conditions shall be avoided.3.17 OBJECTIONABLE CONTAMINANTS(FLTM AN 101-03)All materials shall be free from
30、 residual asphalt and othercontaminants which might cause padding to trim cover materialcontact stains, bondline, or sewline stains.3.18 ADDITIONAL REQUIREMENTS FOR FABRIC COVERED SEAT WELTS3.18.1 Abrasion Resistance, Stoll 1600 cycles(FLTM BN 108-01, Method B, “0“ grit)The resistance to stoll wear
31、of the welt shall be equal toor better than that exhibited by the Master approved byMaterials Engineering.ENGINEERING MATERIAL SPECIFICATION WSS-M15P2-CWP 3948-b Page 7 of 93.19 ADDITIONAL REQUIREMENTS FOR EMBROIDEREDPATTERNS AND MULTI-NEEDLE CHAINSTITCH LINES(When required by application)3.19.1 Con
32、structionEmbroidered patterns shall employ thread as specified bythe Materials Engineering Activity. No embroidered designsmay be employed in the seat cushion area, nor may anyparticular stitch in any given design exceed 3.2 mm inlength. Embroidered designs shall not be used on circularknit construc
33、tions. When embroidery is used on warp knitconstructions, a reinforcement approved by the MaterialsEngineering Activity must be employed. All linear designon knits must run in the wales direction, unlessspecifically approved by Materials Engineering.Multi-needle chainstitch lines.(Sewn per full serv
34、ice supplier productionspecification)Recommended sewing needle: Type 180/24 (1.8 mm dia) Set R(Round Point). Length to be compatible to sewing machine.Recommended sewing thread: Top and bottom thread accordingto WSD-M15H60-A and WSD-M15H42-B respectively or MaterialsEngineering approved alternative.
35、Recommended stitch length: 5.1 - 4.2 mm (5 - 6 stitchesper inch)Recommended stitch style should reflect actual productionmethods.3.19.2 Flex-Fold Resistance(FLTM BN 102-04, Procedure A, exceptembroidery sample shall be sewn alongperimeter to a 230 x 300 mm piece ofurethane foam, similar to the inten
36、dedapplication) Not required for leather.Wales or Warp 10,000 cyclesCourses or Fill 10,000 cyclesNo evidence of excessive needle hold enlargement or r unsdue to ruptured stitches.ENGINEERING MATERIAL SPECIFICATION WSS-M15P2-CWP 3948-b Page 8 of 93.19.3 Breaking Strength Retention(ASTM D 5034, Grab M
37、ethod)Shall retain a minimum of 50 % of original fabric breakingstrength in each direction. In addition, the retainedbreaking strength shall not be below 310 N in either walesor courses direction (or warp and fill direction). Material which does not meet the above requirements mustbe reinforced as s
38、pecified in para 3.18.1.3.19.4 Resistance to Pilling Wear No wear throug h (FLTM BN 108-14, 5 minutes) the finish to russetWSS-M1F17-B, C, D, F 89 N LoadWSS-M1F17-E 111 N Load3.19.5 Abrasion Resistance, Stoll 1,600 cycles(FLTM BN 108-01, “0“ grit)Not required for leather3.19.6 Abrasion Resistance, T
39、aber 1,000 cycles(SAE J948, 1 kg load, CS-10 wheels)Not required for leatherNo evidence of excessive surface snagging, threadbreaking, or scuffing.3.20 ADDITIONAL REQUIREMENTS FOR PERFORATED LEATHERResistance to Fiber Show Through None VisibleTest Method: The test shall be conducted on a 305 mm x 30
40、5 mm areaof original perforated leather seating surface. With moderatepressure, vacuum the entire surface for 1 minute using the vacuumcleaner specified in SAE J948 with 28 mm nozzle and maximumpressure setting. The material shall be judged a failure if thereis fiber show through to the surface.3.21
41、 FUNCTIONAL ASSEMBLYThe criterion for the finished product accept ability shall be theassembly job performance as used in a vehicle, and as approvedbased on functional and durability cycle tests. This means thatsuch properties as dimensional stability and other criticalcharacteristics may be relaxed
42、 or made more stringent dependingupon specific applications as dictated by methods of retention,size of assemblies, etc. Such deviations (i.e., relaxed or morestringent) shall be specified on the engineering drawing.ENGINEERING MATERIAL SPECIFICATION WSS-M15P2-CWP 3948-b Page 9 of 93.22 SUPPLIERS RE
43、SPONSIBILITYAll materials supplied to this specification must be equivalent inall characteristics to the material upon which approval wasoriginally granted.Prior to making any change in the properties, composition,construction, color, processing or labeling of the materialoriginally approved under t
44、his 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 proposedchanges and obtain the written approval of the MaterialsEngineering activit
45、y. Test data, test samples and a new codeidentification are 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 Materials Specification WSS-M99P9999-A1.4. APPROVAL OF
46、 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 theaffected Purchasing, Design and Materials Engineering activity. Uponrequest,
47、 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 compliance with all the requirements of thisspecification (test results, not nominal
48、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.
