1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Release/Revision1991 09 10 NB00I10043054122 Released D.Henrickson B.Ferns L.MoriartyWP 3948-a Page 1 of 5 WEBBING, POLYESTER, NEEDLE LOOM, SMOOTH EDGE LWSB-M7H34-B1. SCOPEThe material defined by this specification
2、is a polyeste 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 sh
3、all be of goodquality and uniform construction.2. APPLICATIONThis s pecification was released originally for material used for metal tometal type seat belts on 1993 vehicles.3. REQUIREMENTSTest Method Procedures: All webbing properties denoted by L shall be testedin accordance with Federal Motor Veh
4、icle Safety Standard No. 209.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 acceptable Control Pl
5、an 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 based on ma terial cond
6、itioned ina controlled atmosphere of 23 +/- 2 C and 48 - 6 7 % 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 Centermaster sample, or
7、 shall be as specified on the engineering drawing.Not e: This webbing is to be manufactured in an eleven panel weaveconstruction (not including the edges as panels).ENGINEERING MATERIAL SPECIFICATIONLWSB-M7H34-BWP 3948-b Page 2 of 5 3.4 THICKNESS 1.14 +/- 0.05 mm(SAE J882)3.5 WIDTHMeasured at less t
8、han 22 N loadL 3.5.1, min 47.0 mm3.5.2, max 50.8 mmMeasured at 9 790 N loadL 3.5.3, min 47.0 mm3.6 COMPOSITION(ASTM D 629)Polyester 100 %3.7 WEIGHT, min 5.7 kg/100 mL 3.8 BREAKING STRENGTH, min 27 140 NL 3.9 ELONGATION, max 9 % at 11 120 NL 3.10 RESISTANCE TO LIGHT, min 87 % of original(Retained bre
9、aking 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)L 3.12 RESISTANCE TO BUCKLE ABRASION, min 20 560 N(Retained br
10、eaking strength after 5 000abrasion strokes - 2 500 cycles)3.13 RESISTANCE TO FADE(AATCC Evaluation Procedure 1)L 3.13.1 Weatherometer, min (max) Rating 3(100 h without water spray) (3.4 DE)3.13.2 Xenon Arc, min (max) Rating 3(SAE J1885, 225.6 kJ/m ) (3.4 DE)2No individual yarn or combination of yar
11、ns shall fade, stain orexhibit any color tone change, nor shall the yarns change in hue orbrightness in excess of the above ratings.L 3.14 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 2ENGIN
12、EERING MATERIAL SPECIFICATIONLWSB-M7H34-BWP 3948-b Page 3 of 5 L 3.15 COLORFASTNESS TO STAINING-BLEEDING, min (max) Rating 4(FLTM AN 101-01, AATCC Evaluation Procedure 2) (4.3 DE)3.16 PERSPIRATION, minRating 4.5(FLTM AN 101-01, AATCC Evaluation Procedure 2) (2.2 DE)3.17 SPOTTING, min (max)(FLTM AN 1
13、01-01, AATCC Evaluation Procedure 2)3.17.1 All colors - Water Rating 5(1.8 DE)3.17.2 For Light Colors OnlyCoffee Rating 5(1.8 DE)Soap Solution (25 % Lux or Rating 5equivalent) (1.8 DE)Motor Oil (SAE 30 W) Rating 5(1.8 DE)Colors designated light or mutually agreed to by thesupp lier and Body Engineer
14、ing must meet this spottingrequirement.3.18 SOILING AND CLEANABILITY, max(FLTM BN 112-04, 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 soili
15、ngrequirement.3.19 PLIABILITY(FLTM BN 102-05)3.19.1 Lateral (fill) direction 175 - 600The webbing when flexed and tested with the pres cribed weightshall have the above reading of 175 - 600 units on the dialindicator face. Use a total of 50 g weight. Mo ving parts ofthe dial indicator add up to 20 g
16、, that is, add a 30 g weighton top of the indicator.3.19.2 Longitudinal (warp) direction, max 130 mmENGINEERING MATERIAL SPECIFICATIONLWSB-M7H34-BWP 3948-b Page 4 of 5 3.20 FOGGING (Initial certification only for each color)(FLTM BO 116-03)Fog Number, min 60The formation of droplets or coalescence i
17、nto a clear film is causefor rejection.3.21 FLAMMABILITY(ISO 3795/SAE J369)Burn Rate, max 100 mm/minute3.22 ADDITIONAL REQUIREMENTSSpecific requirements for material and or manufa ctured parts shall bespecified on the engineering drawing, Engineerin g parts specificationand/or performance specificat
18、ions. All critical areas with respect tothese properties shall be designated on the Engineering drawing.3.23 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent inal l characteristics to the material upon which approval wasoriginally granted.Pr ior to making any c
19、hanges in the properties, composition,constr uction, color, processing or labeling of the materialorig inally approved under this specification, whether or not suchchange s affect the materials ability to meet the specificationrequirements, the Supplier shall notify Purchasing, Toxicology and the af
20、fected Materials Engineering activity of the proposed changesand obtain 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 materia
21、ls addressed by this document. The restrictions aredefined in Engineering Material specification WS S-M99P9999-A1, unlessa different suffix (e.g., A2 or A3) is specified on the engineeringdocument for the application.ENGINEERING MATERIAL SPECIFICATIONLWSB-M7H34-BWP 3948-b Page 5 of 5 4. APPROVAL OF
22、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 expression of interest from theaffec ted Purchasing, Design and Materials Engineering activity. Uponreque
23、st, 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 faci lity, demonstratingful l compliance with all the requirements of this specification (testresults, not nom
24、inal values), the material designation a nd code number, andtes t specimens for Ford evaluation. Fords engineering approval of amateri al will be based on its performance to this specification and on anassessment of suitability for intended processes and/or applications. Uponapprov al, the material
25、will be added to the Engineering Material ApprovedSource List.5. GENERAL INFORMATIONThe information given below is provided for clarification and assistancein meeting the requirements of this specification.5.1 INSTRUMENTED COLOR READINGSThe instrument used for color difference measure ments shall be eithera spect rophotometer or a tristimulus colorimeter, and shall becapable of 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)
