1、 FORD LABORATORY TEST METHOD BN 102-04 Date Action Revisions Rev 03 2013 12 03 Revised Editorial - Removed Atlas, added Schap Specialty Machine under source. L. Schmalz, NA 2007 09 25 Revised Revised Ford Flex Fold Tester Page 1, Tread Page 2, Procedure 2, 3, & 4 Page 3, M. Dumitrescu 1995 08 23 Con
2、trolled document at www.MATS Copyright 2013, Ford Global Technologies, LLC Page 1 of 4 DETERMINATION OF FLEX FOLD OF TEXTILE TRIM MATERIALS Application This procedure is used to determine the durability of sewn and dielectrically bonded seams of trim assemblies and also of individual trim materials.
3、 Equipment Required Ford Flex Fold Tester Model CF15F or equivalent device Must be provided with flat bar clamps which allow a maximum 300 mm width of test specimens to be accommodated. In addition, for each clamp, a weight of 13.6 kg-force is required. Source: Custom Scientific Instruments Division
4、 of Atlas Electric Devices 13 Wing Drive Cedar Knolls, New Jersey 07927 Telephone (201) 538-8500 Fax (201) 984-6793 or Schap Specialty Machine, Inc. 17309 Taft Street Spring Lake, MI 49456 Telephone (616) 846-6530 Sewing Machine Capable of producing a lock stitched seam as described under Procedure
5、 Para. 2. Singer 211 U566 or Juki lock stitch industrial type Source: Singer Sewing Machine Co. Ltd. Source: M.J. Foley Company 415 Bonhill Street 16580 Eastland London E.C.2 Roseville, Mi 48066 Phone (810) 779-5050 Fax (810) 776-1278 FORD LABORATORY TEST METHOD BN 102-04 Copyright 2013, Ford Globa
6、l Technologies, LLC Page 2 of 4 Needle Type 180/24 (1.8 mm dia, set R (round point) unless otherwise specified in the Engineering Material Specification. Source: Singer Sewing Machine Co. Ltd. or M.J. Foley Company See Above or Eurosew Ltd. 7 Stafford Place Moulton Park Ind. Estate Northampton North
7、amptonshire NN3 1NN or Ferd. Schmetz GmbH 512 Herzogenrath, Merkensteinerstrasse 53 Germany or Approved alternative Thread WSD-M15H51-D/E/B2 respectively or equivalent, for top and bottom, unless otherwise specified in the Engineering Material Specification. Conditioning and Test Conditions All test
8、 values indicated 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. Procedure Method “A“ for Sewn Trim Assemblies 1. Using the mate
9、rial to be tested, prepare the test assembly in line with the design released for production. 2. Cut 4 warp or wales specimens each 250 x 300 mm in size with the longer dimension parallel to the weft or courses direction, and 4 weft or courses specimens with the longer dimension parallel to the warp
10、 or wales direction. 3. Sew 2 pairs of warp or wales specimens and 2 pairs of weft or courses specimens with the sewn seams parallel to the longer dimension (as shown in drawing). Tie the loose ends of the stitching threads at either end. The ends of the stitching threads may also be secured by sewi
11、ng an adjacent piece of fabric or sealing the thread ends with adhesive. 4. Bring the flexing arm of the tester into a mid-point position, and clamp the test specimen assembly in with the 300 mm side parallel to the clamps. 5. Adjust the tester for a stroke length of 89 mm. 6. Apply the 13.6 kg-forc
12、e weights to the 300 mm test specimen width. FORD LABORATORY TEST METHOD BN 102-04 Copyright 2013, Ford Global Technologies, LLC Page 3 of 4 Note: It is important to insure that the weights and the appropriate load bearing arms are completely free in their movement throughout the test. 7. Flex speci
13、mens for 10,000 cycles. Sewn-Seam Construction The stitch shall be a simple lock stitch with a stitch length of 4.2 5.1 mm (5 6 stitches/25 mm) and shall run approximately 10 mm from the cut edges of the test specimen. Evaluation Examine specimens for needle hole enlargement, seam separation and any
14、 other deterioration/deformation of the material (fabric, vinyl coated, etc.). Method “B“ for Dielectrically Welded Trim Assemblies 1. From a trim assembly released for production and dielectrically welded under normal production conditions, two specimens are cut out 250 x 300 mm in size, one along
15、the seam line and the other one at right angles to it. 2. Proceed further as per Method “A“ No. 5 - 8. Evaluation Examine specimens for failure e.g. separation or any other deterioration of the welded seams. In addition, the loss of bond strength of the welded seam must be computed and quoted as a p
16、ercent value. The evaluation of bond strength must be done according to Ford Laboratory Test Method BN 151-01. Compute the bond strength loss as follows: Bond strength loss % = N1 N2 x 100 % N1 Where: N1 = bond strength in the original condition N2 = bond strength after the flex-fold test Chemicals, materials, parts, and equipment referenced in this document must be used and handled properly. Each party is responsible for determining proper use and handling in its facilities. FORD LABORATORY TEST METHOD BN 102-04 Copyright 2013, Ford Global Technologies, LLC Page 4 of 4
