1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev. 2 2013 11 20 N Status Replaced by WSS-M8P25-A D. Murtonen, NA 2010 12 16 Revised See Summary of revisions. Floor mats threads only to be replaced by WSS-M8P22-A L. Sinclair, NA 2008 12 09 Activated L. Schmalz, FNA Controlled document at
2、www.MATS Copyright 2013, Ford Global Technologies, LLC Page 1 of 3 PERFORMANCE, SEWING THREAD WSS-M8P5-C NOT TO BE USED FOR NEW DESIGN 1. SCOPE This specification defines the performance requirements for sewing threads. 2. APPLICATION This specification was released originally for material used in s
3、ewing operations in the manufacture of seat covers, trim assemblies, steering wheels, seatbelts, convertible top boot and convertible top applications, see Table 1. 3. REQUIREMENTS 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys S
4、tandard Requirements for Production Materials (WSS-M99P1111-A). 3.2 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. 3.3 BALANCE Take a one meter length of sewing thread drawn freely f
5、rom the side of the spool (without undue tension and without passing it through any restriction such as fingers, etc.) and bring the thread together to form a free hanging loop. In this position, the thread must not twist upon itself more than twice. 3.4 TENSILE STRENGTH, min (ASTM D 204-02) Tex Ten
6、sile Strength 30 Nylon 17 N 50 Nylon 24 N 70 Nylon 45 N 90 Nylon 54 N 135 Nylon 87 N 150 Nylon 102 N 210 Nylon 135 N 90 PET 55 N 105 PET 30 N 135 PET 80 N 3.4.1 Elongation, min 15 - 30% (ASTM D 204-02) ENGINEERING MATERIAL SPECIFICATION WSS-M8P5-C Copyright 2012, Ford Global Technologies, LLC Page 2
7、 of 3 3.5 TENSILE STRENGTH AFTER AGING (ASTM D 204-02) 3.5.1 After Heat Age, min retained 70% (21 days at 100 +/- 2 C) 3.5.2 After Ultraviolet, min retained 70% (FLTM BO 116-01, 150.4 kJ/m2) 3.6 RESISTANCE TO FADE, min Rating 4 (FLTM BO 116-01, ISO 105 A-02/AATCC Evaluation Procedure 1) Embroidery T
8、hread, 451.2 kJ/m2 All Other Types of Thread, 150.4 kJ/m2 3.7 RESISTANCE TO CROCKING, min (FLTM BN 107-01, AATCC Evaluation Procedure 2) Dry Rating 4 Wet Rating 4 3.8 HEAT AGING, min Rating 4 (7 days at 100 +/- 2 oC, AATCC Evaluation Procedure 1) 3.9 RESISTANCE TO BLEEDING, PERSPIRATION AND SPOTTING
9、, min Rating 4 (FLTM AN 101-01, AATCC Evaluation Procedure 2) 3.10 SEWING TEST After the thread has been tested per the requirements stated above, it shall be assessed by a sewing test conducted under normal production conditions. The thread must process under production conditions without any reser
10、vations and meet the sewn seam requirements of the cover material specifications. Suppliers deliveries can be rejected because of excessive rates of breakage and/or other manufacturing difficulties (knots, foreign matter, etc.). In addition, after sewing, the thread shall not exhibit objectionable s
11、treaks or any change in hue or purity of color. 3.11 NUMBER OF KNOTS The thread spool shall be free from all imperfections of such character which would cause the thread to break during sewing. 3.12 IDENTIFICATION Each spool of thread must bear the name of the manufacturer, color suffix, and yarn si
12、ze. 3.13 PACKING The material must be packed in such a way that in transit no slippage of the thread layers or any other damage occurs. ENGINEERING MATERIAL SPECIFICATION WSS-M8P5-C Copyright 2012, Ford Global Technologies, LLC Page 3 of 3 4. SUMMARY OF REVISIONS 2010 12 16 - Removed reference to fl
13、oor mats in 2.0 application. - Removed 50 Tex Nylon - Added replacement specification in footer for floor mat threads, WSS-M8P22-A. TABLE 1 Tex Application # of Plies Twists, turns/m 30 Nylon Embroidery, Seat Side Impact Airbag 3 440-530 70 Nylon Bobbin thread 3 230-420 90 Nylon Seat sewing 4 280-440 135 Nylon Steering Wheel 3 280-440 150 Nylon Seat Belt 1 98-177 210 Nylon Steering Wheel/Knobs 3 236-315 90 PET Convertible Top Boot 4 _ 105 PET Underside of Hook Fastener 3 80-120 135 PET Convertible Top 3 280-440
