1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 03 2018 01 24 Editorial See Summary of Revisions D. Stark, NA 2011 02 25 Revised See Summary of Revisions L. Sinclair, NA 2010 06 11 Activated L. Sinclair, NA Copyright 2018, Ford Global Technologies, LLC Page 1 of 4 WEBBINGS, INFLATABLE
2、SAFETY BELTS, WSS-M8P21-A HIGH STRENGTH, LOW ELONGATION 1. SCOPE The materials defined by these specifications are seat belt webbings specifically used for inflatable seat belt assemblies. Materials are woven from an untwisted continuous filament yarns and finished salvages. The structure alternativ
3、ely varies from one piece woven webbing to structural woven tube and includes a directional tear seam in the tubular lengths of the material. Width in the varying structure must be maintained to meet program requirements and transitions should be flawless in its appearance. A subtle marker pattern t
4、o identify both direction of tear and location shall be incorporated into the materials lengths. Proper dyes and dyeing procedures shall be employed, the yarns may be spun dyed or the webbing may be piece dyed to provide acceptable color, appearance, and physical properties. A surface finish may be
5、applied to enhance abrasion resistance and/or surface friction. Color stripping for re-dyeing of webbing rejected for color is not allowed. The webbing shall be of good quality and uniform construction. 2. APPLICATION These specifications were released originally for materials used in the manufactur
6、ing of inflatable seat belt assemblies. 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, ADR 4, JIS D4604, etc and the seat belt SDS. 3.1
7、 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.1.1 Materials used in interior applications must meet the requirements outlined in WSS-M99P2222-B1/Latest, Performance
8、, Vehicle Interior Environment Quality Material/Component Requirements. Data must be included in material submission package. 3.2 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 S
9、PECIFICATION WSS-M8P21-A Copyright 2018, Ford Global Technologies, LLC Page 2 of 4 3.3 PHYSICAL PROPERTIES 3.3.1 Breaking Strength (FMVSS 209, S5.1(b) Tubular Section 26.0 kN min. One Piece Webbing Section 26.0 kN min 3.3.2 Elongation, (FMVSS 209, S5.1(c) Tubular Section 6-10% One Piece Webbing Sect
10、ion 6-10% 3.3.3 Resistance to Abrasion (FMVSS 209, S5.1(d) and S5.3(c) After testing per section 3.3.1 Tubular Section 75% of original breaking strength One Piece Webbing Section 75% of original breaking strength 3.3.4 Resistance to Micro Organisms (FMVSS 509 S5.1(f) After testing per section 3.3.1
11、Tubular Section 85% of original breaking strength One Piece Webbing Section 85% of original breaking strength 3.3.5 Tear Seam Strength 400-750 kPa (01.20-E-12871 / legacy DVM-0078-SB) 3.3.6 Pliability (FLTM BN 102-05, ASTM D 747 (direct reading at 60, 12.7 mm span length) Pliability requirements wil
12、l 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 suppliers. The method and agreed upon requirements will be submitted with the initial source approval and made a part of th
13、e record. Any requirement changes in excess of +/- 15% for a currently approved construction on either section will require a new approval submission. ENGINEERING MATERIAL SPECIFICATION WSS-M8P21-A Copyright 2018, Ford Global Technologies, LLC Page 3 of 4 3.4 APPEARANCE PROPERTIES 3.4.1 Resistance t
14、o Fade (FLTM BO 116-01, ISO 105-A02/ AATCC Evaluation Procedure 1) 977.6 kJ/m2 Webbing using spun dyed yarns and black Rating 4 Piece-dyed webbing Rating 3 No individual yarn or combination of yarns shall fade, stain or exhibit any color tone change, nor shall the yarns change in hue or brightness i
15、n excess of the above ratings. 3.4.2 Resistance to Crocking (FLTM BN 107-01, ISO 105-A03/ AATCC Evaluation Procedure 2) Dry Rating 4 min Distilled Water Rating 4 min 3.4.3 Resistance to Bleeding Rating 4 min (FLTM AN 101-01, ISO 105-A03/ AATCC Evaluation Procedure 2) 3.4.4 Resistance to Perspiration
16、 Rating 4 min (FLTM AN 101-01, ISO 105-A03/ AATCC Evaluation Procedure 2) 3.4.5 Soiling and Cleanability Rating 4 min (FLTM BN 112-08, ISO 105-A03/ AATCC Evaluation Procedure 2) 3.5 FOGGING (SAE J1756, 3 h at 100 C heating, 21 C cooling plate, post test conditioning 16 h) Fog Number 70 min. Formatio
17、n of clear film, droplets or crystals is cause for rejection. 3.6 ODOR Rating 3 max (FLTM BO 131-03) 3.7 FLAMMABILITY (ISO 3795/SAE J369) Burn Rate 100 mm/minute max ENGINEERING MATERIAL SPECIFICATION WSS-M8P21-A Copyright 2018, Ford Global Technologies, LLC Page 4 of 4 4. GENERAL REQUIREMENTS The i
18、nformation given below is provided for clarification and assistance in meeting the requirements of this specification. 4.1 ADDITIONAL REQUIREMENTS/CREASE RECOVERY Specific crease recovery requirements may be required by the seat belt system manufacturer and/or the vehicle assembly plant, where induc
19、ed creasing of the webbing may be caused by specific folding requirements 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 agre
20、ed upon between the supplier and the affected Materials Engineering 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
21、 areas with respect to these properties shall be designated on the Engineering drawing. 5. SUMMARY OF REVISIONS 01/24/2018 Editorial Updated test method number in 3.3.5 to current FSMS number. 01/12/11 Modified 3.1.1 to include all vehicles for the B1/latest suffix. Modified Tear Seam Strength from 8.6 +/- 0.7 bar to 400-750 kPa to incorporate +/- 4 sigma limits. 2010 08 26 Removed different ratings allowed for conditions 1, 2 and 3 for section 3.6 odor.
