1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Release/Revision1992 06 10 NB00I10043054190 Released D.Henrickson B.FernsWP 3948-a Page 1 of 5 WEBBING, POLYESTER, CHILD RESTRAINT, SAFETY BELT LWSB-M7H50-A1. SCOPEThe material defined by this specification is a po
2、lyeste r seat belt webbingwoven with continuous filament yarn and finished selvage s. Proper dyes anddyeing procedures shall be employed to provide acceptable colors,app earance, and physical properties. Color stripping for redyeing ofwebbi ng rejected for color is not allowed. The webbing shall be
3、of goodquality and uniform construction.2. APPLICATIONThis s pecification was released originally for material used for metal tometal type seat belts on Integrated Child Seat systems.3. REQUIREMENTSTest Method Procedures: All webbing properties denoted by L shall be testedin accordance with Federal
4、Moto r Vehicle Safety Standard Nos. 209 and 213.DE req uirements listed in any of the following paragraphs are intended asmaximum target values. Visual ratings will take precedence.3.1 STATISTICAL PROCESSSupplie rs must conform to the requirements of Ford Quality SystemStand ard Q-101. A mutually ac
5、ceptable 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.L 3.2 CONDITIONING AND TEST CONDITIONSAll test values indicated herein are base
6、d on ma terial conditioned ina controlled atmosphere of 23 +/- 2 C and 48-67 % relative humidityfor not less than 24 h prior to testing and tested under the sameconditions unless otherwise specified.3.3 APPEARANCE(FLTM BI 109-01)The color, pattern, and finish shall match the a pproved Design Centerm
7、aster sample, or shall be as specified on the engineering drawing.Note: This webbing is to be manufactured with a 2 x 2 herringbonereversing twill resulting in five uneven panels.ENGINEERING MATERIAL SPECIFICATIONLWSB-M7H50-AWP 3948-b Page 2 of 5 3.4 THICKNESS 1.20 +/- 0.15 mm(SAE J882)3.5 WIDTHMeas
8、ured at less than 22 N loadL 3.5.1, min 38.0 mm3.5.2, max 41.0 mm3.6 COMPOSITION(ASTM D 629)Polyester 100 %3.7 WEIGHT, min 3.8 kg/100 m3.8 BREAKING STRENGTH, min 19 570 N(FMVSS 209, S5.1(b)3.9 ELONGATION, max 12 % at 8 150 N(FMVSS 209, S5.1(c)L 3.10 RESISTANCE TO LIGHT, min 87 % of original(Retained
9、 breaking strength after 100 breaking strengthweatherometer hours exposure withoutwater spray)L 3.11 RESISTANCE TO HEX BAR ABRASION, min 77 % of original(Retained breaking strength after 5 000 breaking strengthabrasion strokes - 2 500 cycles, using2.35 kg weight)3.12 RESISTANCE TO FADE(AATCC Evaluat
10、ion Procedure 1)L 3.12.1 Weatherometer, min (max) Rating 3 (3.4 DE)(100 h without water spray)3.12.2 Xenon Arc, min (max) Rating 3 (3.4 DE)(SAE J1885, 225.6 kJ/m )2No individual yarn or combination of yarns shall fade, stain orexhibit any color tone change, nor shall the yarns change in hue orbright
11、ness in excess of the above ratings.L 3.13 COLORFASTNESS TO CROCKING, WET AND DRY, min (max) Rating 4 (4.3 DE)Note: Instrumental reading to be determined per FLTM BN 107-02, AATCCEvaluation Procedure 2.L 3.14 COLORFASTNESS TO STAINING-BLEEDING, Rating 4 (4.3 DE)min (max)(FLTM AN 101-01, AATCC Evalua
12、tion Procedure 2)3.15 PERSPIRATION, min (max) Rating 4.5(FLTM AN 101-01, AATCC Evaluation Procedure 2) (2.2 DE)ENGINEERING MATERIAL SPECIFICATIONLWSB-M7H50-AWP 3948-b Page 3 of 5 3.16 SPOTTING, min (max)(FLTM AN 101-01, AATCC Evaluation Procedure 2)3.16.1 All colors - Water Rating 5 (1.8 DE)3.16.2 F
13、or Light Colors OnlyCoffee Rating 5 (1.8 DE)Soap Solution (25 % Lux or equivalent) Rating 5 (1.8 DE)Motor Oil (SAE 30 W) Rating 5 (1.8 DE)Colors designated light or mutually agreed to by thesupplier and Body Engineering must meet this spottingrequirement.3.17 SOILING AND CLEANABILITY, max(FLTM BN 11
14、2-04, light colors only)Soiling Loss in Reflection 38 %Cleanability Loss in Reflection 28 %Future color selections designated light or mutually agreed to bythe supplier and Body Engineering, must also meet this soilingrequirement.3.18 PLIABILITY(FLTM BN 102-05, except userevised sample holder for 3.
15、18.1)3.18.1 Lateral (fill) direction, min 200 - 700 unitsThe webbing when flexed and tes ted with the prescribed weightshall fall in the above range on the dial indicator face . Usea total of 50 g weight. Moving parts of the dial indicat or addup to 20 g, that is, add a 30 g weight on top of theindi
16、cator.3.18.2 Longitudinal (warp) direction, max 115 mm3.19 FOGGING(FLTM BO 116-03)Fog Number, min 60The form ation of droplets or coalescence into a clear film is causefor rejection.3.20 FLAMMABILITY(ISO 3795/SAE J369)Burn Rate, max 100 mm/minuteENGINEERING MATERIAL SPECIFICATIONLWSB-M7H50-AWP 3948-
17、b Page 4 of 5 3.21 ADDITIONAL REQUIREMENTSSpecific requirements for mater ial and or manufactured parts shall bespecified on the engineering dr awing, Engineering parts specificationand/or performance specificatio ns. All critical areas with respect tothese properties shall be designated on the Engi
18、neering drawing.3.22 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equ ivalent in allchar acteristics to the material upon which approval was originallygranted.Pri or to making any changes in the properties, composition,construction, color, processing or labeling of th
19、e mater ial originallyapproved under this specificati on, whether or not such changes affectthe materials ability to meet the specification requirements, theSupplier shall notify Purchasing, Toxicology and the affected Materials Engineering activity of the proposed changesand obtain the written appr
20、oval of the Materials Enginee ring activity.Test data , test samples and a new code identification are to besubmitted with the request.Substance restrictions imposed by law, regulations or Ford apply toth e materials addressed by this document. The restrictions aredefined in Engineering Material spe
21、cification WSS-M99P9999-A1, unlessa differ ent suffix (e.g., A2 or A3) is specified on the engineeringdocument for the application.4. APPROVAL OF MATERIALSMaterials defined by this specification must have prior approval by theresponsible Materials Engineeri ng activity. Suppliers desiring approval o
22、ftheir mat erials shall first obtain an expression of interest from theaffecte d Purchasing, Design and Materials Engineering activity. Uponrequest, the Supplier shall submit to the affected Materials Engineeringact ivity a completed copy of their laboratory test reports, signed by aqualified and au
23、thorized repres entative of the test facility, demonstratingfu ll compliance with all the requirements of this specification (testresults, not nominal values), t he material designation and code number, andtest spec imens for Ford evaluation. Fords engineering approval of amateria l will be based on
24、 its performance to this specification and on anassessment of suitability for i ntended processes and/or applications. Uponapproval, the material will be added to the Engineering Material ApprovedSource List.ENGINEERING MATERIAL SPECIFICATIONLWSB-M7H50-AWP 3948-b Page 5 of 5 5. GENERAL INFORMATIONTh
25、e information given below is provided for clarification and assistance inmeeting the requirements of this specification.5.1 INSTRUMENTED COLOR READINGSThe instrument used for color d ifference measurements shall be eithera spectrophotometer or a tristimulus colorimeter, and sh all be capableof providing the following:Geometry 0/45Observer 10 degreeSpecular Reflectance In (if an option)Illuminant D 65Sample port size 25 mm (unless specified otherwisein test method)
