1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Release No. Release/Revision 2010 03 04 N-STATUS No replacement named L. Sinclair, NA 1991 09 10 NB00E1004306463 Revised 3, 3.7, 3.14, 3.19.2 DRH BCF LWM 1991 03 19 NB00I10043054071 Released D.Henrickson J.McCallum L.Moriart
2、y WP 3948-a Page 1 of 5 WEBBING, POLYESTER, HIGH ELONGATION, SAFETY BELT WSB-M7H48-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a polyester seat belt webbing woven with continuous filament yarn and finished selvages. Proper dyes and dyeing procedures shall b
3、e employed to provide acceptable colors, appearance, and physical properties. Color stripping for redyeing of webbing rejected for color is not allowed. The webbing shall be of good quality and uniform construction. 2. APPLICATION This specification was released originally for material used for meta
4、l to metal type seat belts on 1992 Econoline vehicles. 3. REQUIREMENTS Test Method Procedures: All webbing properties denoted by shall be tested in accordance with Federal Motor Vehicle Safety Standard No. 209. DE requirements listed in any of the following paragraphs are intended as maximum target
5、values. Visual ratings will take precedence. 3.1 STATISTICAL PROCESS Suppliers must conform to the requirements of Ford Quality System Standard Q-101. A mutually acceptable Control Plan as described therein is required for material/source approval. Appropriate statistical tools must be used to analy
6、ze process/product data so that variation in the final product is continuously reduced. 3.2 CONDITIONING AND TEST CONDITIONS All test values indicated herein are based on material conditioned in a controlled atmosphere of 23 +/- 2 C and 48 - 67 % relative humidity for not less than 24 h prior to tes
7、ting and tested under the same conditions unless otherwise specified. 3.3 APPEARANCE (FLTM BI 109-01) The color, pattern, and finish shall match the approved Design Center master sample, or shall be as specified on the engineering drawing. Note: This webbing is to be manufactured with a 2 x 2 herrin
8、gbone reversing twill resulting in fifteen even panels. ENGINEERING MATERIAL SPECIFICATION WSB-M7H48-A WP 3948-b Page 2 of 5 3.4 THICKNESS, max 1.35 mm (SAE J882) 3.5 WIDTH Measured at less than 22 N load 3.5.1, min 45.75 mm 3.5.2, max 48.0 mm Measured at 9 790 N load 3.5.3, min 45.75 mm 3.6 COMPOSI
9、TION (ASTM D 629) Polyester 100 % 3.7 WEIGHT 6.10 - 6.35 kg/100 m 3.8 BREAKING STRENGTH, min 27 140 N 3.9 ELONGATION, max 15 % at 11 120 N min 12 % at 11 120 N 3.10 RESISTANCE TO LIGHT, min 87 % of original (Retained breaking strength after 100 breaking strength weatherometer hours exposure without
10、water spray) 3.11 RESISTANCE TO HEX BAR ABRASION, min 77 % of original (Retained breaking strength after 5 000 breaking strength abrasion strokes - 2 500 cycles) 3.12 RESISTANCE TO BUCKLE ABRASION, min 20 560 N (Retained breaking strength after 5 000 abrasion strokes - 2 500 cycles) 3.13 RESISTANCE
11、TO FADE (AATCC Evaluation Procedure 1) 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/m2) (3.4 DE) No individual yarn or combination of yarns shall fade, stain or exhibit any color tone change, nor shall the yar
12、ns change in hue or brightness in excess of the above ratings. 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, AATCC Evaluation Procedure 2. ENGINEERING MATERIAL SPECIFICATION WSB-M7H48-A WP 3948-b Page 3 of 5 EN
13、GINEERING MATERIAL SPECIFICATION WSB-M7H48-A WP 3948-b Page 4 of 5 3.15 COLORFASTNESS TO STAINING-BLEEDING, min (max) Rating 4 (FLTM AN 101-01, AATCC Evaluation Procedure 2) (4.3 DE) 3.16 PERSPIRATION, min (max) Rating 4.5 (FLTM AN 101-01, AATCC Evaluation Procedure 2) (2.2 DE) 3.17 SPOTTING, min (m
14、ax) (FLTM AN 101-01, AATCC Evaluation Procedure 2) 3.17.1 All colors - Water Rating 5 (1.8 DE) 3.17.2 For Light Colors Only Coffee 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 the su
15、pplier and Body Engineering must meet this spotting requirement. 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 by the supplier and Body Enginee
16、ring, must also meet this soiling requirement. 3.19 PLIABILITY (FLTM BN 102-05) 3.19.1 Lateral (fill) direction, min 775 units The webbing when flexed and tested with the prescribed weight shall have the above reading of 775 units minimum on the dial indicator face. Use a total of 50 g weight. Movin
17、g parts of the dial indicator add up to 20 g, that is, add a 30 g weight on top of the indicator. 3.19.2 Longitudinal (warp) direction, max 130 mm 3.20 FOGGING (Initial certification only for each color) (FLTM BO 116-03) Fog Number, min 60 The formation of droplets or coalescence into a clear film i
18、s cause for rejection. ENGINEERING MATERIAL SPECIFICATION WSB-M7H48-A WP 3948-b Page 5 of 5 3.21 FLAMMABILITY (ISO 3795/SAE J369) Burn Rate, max 100 mm/minute 3.22 ADDITIONAL REQUIREMENTS Specific requirements for material and or manufactured parts shall be specified on the engineering drawing, Engi
19、neering parts specification and/or performance specifications. All critical areas with respect to these properties shall be designated on the Engineering drawing. 3.23 SUPPLIERS RESPONSIBILITY All materials supplied to this specification must be equivalent in all characteristics to the material upon
20、 which approval was originally granted. Prior to making any changes in the properties, composition, construction, color, processing or labeling of the material originally approved under this specification, whether or not such changes affect the materials ability to meet the specification requirement
21、s, the Supplier shall notify Purchasing, Toxicology and the affected Materials Engineering activity of the proposed changes and obtain the written approval of the Materials Engineering activity. Test data, test samples and a new code identification are to be submitted with the request. Substance res
22、trictions imposed by law, regulations or Ford apply to the materials addressed by this document. The restrictions are defined in Engineering Material specification WSS-M99P9999-A1, unless a different suffix (e.g., A2 or A3) is specified on the engineering document for the application. 4. APPROVAL OF
23、 MATERIALS Materials defined by this specification must have prior approval by the responsible Materials Engineering activity. Suppliers desiring approval of their materials shall first obtain an expression of interest from the affected Purchasing, Design and Materials Engineering activity. Upon req
24、uest, the Supplier shall submit to the affected Materials Engineering activity a completed copy of their laboratory test reports, signed by a qualified and authorized representative of the test facility, demonstrating full compliance with all the requirements of this specification (test results, not
25、 nominal values), the material designation and code number, and test specimens for Ford evaluation. Fords engineering approval of a material will be based on its performance to this specification and on an assessment of suitability for intended processes and/or applications. Upon approval, the mater
26、ial will be added to the Engineering Material Approved Source List. ENGINEERING MATERIAL SPECIFICATION WSB-M7H48-A WP 3948-b Page 6 of 5 5. GENERAL INFORMATION 5.1 INSTRUMENTED COLOR READINGS The instrument used for color difference measurements shall be either a spectrophotometer or a tristimulus colorimeter, and shall be capable of providing the following: Geometry 0/45 Observer 10 degree Specular Reflectance In (if an option) Illuminant D 65 Sample port size 25 mm (unless specified otherwise in test method)
