1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Changes 2009 07 20 N-STATUS Replaced by WSS-M8P5-C L. Schmalz, NA 1992 08 20 C10176304 Clauses 3.5, 3.6 and 5.2 revised. NJK 1992 04 01 C10204848 Released J.Joshi WP 3948-a Page 1 of 3 THREAD, POLYAMIDE, SINGLE PLY WS
2、D-M15H59-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a multifilament polyamide thread manufactured as a single ply. 2. APPLICATION This specification was released originally for material used as an underthread in sewing operations in the manufacture of auto
3、motive seat and seat back cover assemblies and/or as specified on Engineering drawings. 3. REQUIREMENTS In addition to the requirements quoted herein, this material must meet the requirements of the Performance Specification, WSD-M8P5-B, except clauses 3.6.1 U.V. DEGRADATION and 3.7 RESISTANCE TO FA
4、DE. 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 analyze process/product data so that variation
5、 in the final product is continuously reduced. 3.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSIS Ford Motor Company, at its option, may conduct infrared and/or thermal analysis of material/parts supplied to this specification. The IR spectra and thermogram established for initial approval shall
6、 constitute the reference standard and shall be kept on file at the designated material laboratory. All samples shall produce IR spectra and/or thermograms that correspond to the reference standard when tested under the same conditions. 3.3 CONDITIONING AND TEST CONDITIONS All test values indicated
7、herein are based on material conditioned in a controlled atmosphere of 23 +/- 2 C and 50 +/- 5 % relative humidity for not less than 24 h prior to testing and tested under the same conditions unless otherwise specified. ENGINEERING MATERIAL SPECIFICATION WSD-M15H59-A WP 3948-b Page 2 of 3 3.4 APPEAR
8、ANCE (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. 3.5 YARN CONSTRUCTION AND DESCRIPTION (ASTM D 1244) The thread is manufactured from one end of 70 tex f 100, multi-filament, bright, high te
9、nacity Polyamide 6.6 yarn. It is twisted in Reverse (Z) direction. 3.6 PHYSICAL REQUIREMENTS 3.6.1 Thread Size, range 72 +/- 6 Tex (FLTM BN 150-01) 3.6.2 Tensile Strength, min 40 N (FLTM BN 150-01, 125 mm/minute) 3.6.3 Elongation at Break, range 16 - 24 % (FLTM BN 150-01, 125 mm/minute) 3.6.4 Twist,
10、 range 150 - 240 turns/m (FLTM BN 150-01) 3.7 ADDITIONAL REQUIREMENTS 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 sha
11、ll be clearly designated on the Engineering drawing. 3.8 SUPPLIERS RESPONSIBILITY All materials supplied to this specification must be equivalent in all characteristics to the material upon which approval was originally granted. Prior to making any change in the properties, composition, construction
12、, color, processing or labelling of the material originally approved under this specification, whether or not such changes affect the materials ability to meet the specification requirements, the Supplier shall notify Purchasing, Toxicology and the affected Materials Engineering activity of the prop
13、osed 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 restrictions imposed by law, regulations or Ford, apply to the materials addressed by this document. The restricti
14、ons are defined in Engineering Material Specification WSS-M99P9999-A1, unless a different suffix (e.g., A2 or A3) is specified on engineering document for the application. ENGINEERING MATERIAL SPECIFICATION WSD-M15H59-A WP 3948-b Page 3 of 3 4. APPROVAL OF MATERIALS Materials defined by this specifi
15、cation 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 request, the Supplier shall submit to the affec
16、ted 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 nominal values), the material designation a
17、nd 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 material will be added to the Engineering Materia
18、l Approved Source List. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of the sewing operations. 5.1 FINISH 4 +/- 2 % The finish shall consist of hard polyamide resin as a bonding agent and a suitable lubricant, e.g., a pol
19、yethylene and silicone type. The primary criterion for acceptability of the finish shall be the threads sewability. Finish content outside this range may be considered acceptable providing that the amount of lubricant or resin does not adversely affect the sewability performance or yield of the thread. 5.2 PUT UP Coreless, flangeless prewound shuttle bobbin of dimensions suitable for use in the shuttle case of sewing machines. Note: Spools can be used to suit Manufacturing requirements.
