1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2003 11 11 Revised Para 3.0 inserted; para 3.1, 3.2 3.15 and 4 deleted; para 3.7, 3.8, 3.9 and 3.14 revised C. Lin 1998 03 06 Activated D. Henrickson, J. Williams Printed copies are uncontrolled Copyright 2003, Ford Global Technologies, Inc. P
2、age 1 of 3 WEBBINGS, SAFETY BELTS MEDIUM STRENGTH, LOW ELONGATION WSS-M7H57-A1 MEDIUM STRENGTH, MEDIUM ELONGATION WSS-M7H57-A2 MEDIUM STRENGTH, HIGH ELONGATION WSS-M7H57-A3 HIGH STRENGTH, LOW ELONGATION WSS-M7H57-A4 HIGH STRENGTH, HIGH ELONGATION WSS-M7H57-A5 1. SCOPE The materials defined by these
3、specifications are seat belt webbings woven with either twisted or untwisted continuous filament yarns and finished selvages and may have a monofilament reinforcement. Proper dyes and dyeing procedures shall be employed, the yarns may be spun dyed or the webbing may be piece dyed to provide acceptab
4、le color, appearance, and physical properties. A surface finish may be applied to enhance abrasion resistance and/or surface friction. Color stripping for re-dyeing of webbing rejected for color is not allowed. The webbings shall be of good quality and uniform construction. 2. APPLICATION These spec
5、ifications were released originally for materials used in the manufacture of seat belts. 3. REQUIREMENTS In addition to the requirements listed herein, materials approved to these specifications must also meet all applicable requirements of marketplace National Standards such as C/FMVSS 209, ECE 16,
6、 ADR 4, JIS D4604, etc. 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). Part producers using this material in their products, must use Ford approved materials and mu
7、st conform to a process control plan which has been approved by STA and/or the relevant Materials Activity. 3.3 APPEARANCE The color, pattern and finish shall match the approved Design Center master sample, or shall be as specified on the Engineering Drawing. ENGINEERING MATERIAL SPECIFICATIONWSS-M7
8、H57-A1/A5Printed copies are uncontrolled Copyright 2003, Ford Global Technologies, Inc. Page 2 of 3 A1 A2 A3 A4 A5 3.4 BREAKING STRENGTH, kN, min 24.75 24.75 24.75 27.0 27.0 (SAE J140, using 100 mm diameter jaws) 3.5 ELONGATION, % 6 - 10 10 - 14 12 - 17 6 - 10 12 - 17 (FMVSS 209, S5.1(c) 3.6 RESISTA
9、NCE TO FADE, min (SAE J1885, AATCC Evaluation Procedure 1) 3.6.1 225.6 kJ/m2, all colors Webbing using spun dyed yarns Rating 4 Piece-dyed webbing Rating 3 3.6.2 488.6 kJ/m2, black only, all types Rating 3 No individual yarn or combination of yarns shall fade, stain or exhibit any color tone change,
10、 nor shall the yarns change in hue or brightness in excess of the above ratings. 3.7 COLORFASTNESS TO CROCKING, WET AND DRY, min Rating 4 - 5 (FLTM BN 107-01, AATCC Evaluation Procedure 2) 3.8 COLORFASTNESS TO STAINING-BLEEDING, min Rating 4 - 5 (FLTM AN 101-01, AATCC Evaluation Procedure 2) 3.9 PER
11、SPIRATION STAINING, min Rating 4 - 5 (FLTM AN 101-01, AATCC Evaluation Procedure 2) 3.10 SOILING AND CLEANABILITY (FLTM BN 112-08) The performance of production material shall be equal to or better than that exhibited by the sample originally approved for production by the Materials Engineering Acti
12、vity. 3.11 PLIABILITY (FLTM BN 102-05, ASTM D 747 (direct reading at 60, 12.7 mm span length) Pliability requirements will vary depending on individual vehicle system needs and marketplace. Therefore, pliability test method and requirements are to be agreed upon by the seatbelt system and webbing su
13、ppliers. The method and agreed upon requirements will be submitted with the initial source approval and made a part of the record. Any requirement changes in excess of +/- 15% for a currently approved construction will require a new approval submission. ENGINEERING MATERIAL SPECIFICATIONWSS-M7H57-A1
14、/A5Printed copies are uncontrolled Copyright 2003, Ford Global Technologies, Inc. Page 3 of 3 3.12 FOGGING (SAE J1756, 3 h at 100 C heating, 21 C cooling plate, post test conditioning 1 h and 16 h) Fog Number, min 70 Formation of clear film, droplets or crystals is cause for rejection. 3.13 FLAMMABI
15、LITY (ISO 3795/SAE J369) Burn Rate, max 100 mm/minute 3.14 ADDITIONAL REQUIREMENTS/CREASE RECOVERY Specific crease recovery requirements may be required by the seat belt system manufacturer and/or the vehicle assembly plant, where induced creasing of the webbing may be caused by specific folding req
16、uirements and/or storage. The induced creasing on the webbing may, under certain circumstances, prevent the webbing from retracting fully. The test method and specific measured values, should be added to the Engineering Drawing and agreed upon between the supplier and the affected Materials Engineer
17、ing and Restraints Engineering Activities. Other specific requirements for material and or manufactured parts shall be specified on the engineering drawing, Engineering parts specification and/or performance specifications. All critical areas with respect to these properties shall be designated on the Engineering drawing.
