1、FORD LABORATORY TEST METHOD EU-BN 025-01 2001 O9 17 DETERMINATION OF WRINKLE FORMING TENDENCY OF TRIM COVERING MATERIALS Revised Editorial - no technical change A. Cockman Application This test procedure is used to determine the extent of wrinkle formation (expressed as depth of sag) of trim coverin
2、g materials e.g. HF-weldable sidewall coverings and headlining materials under differing environmental conditions. Test Equipment Required 1. A stabilized wood frame on which the material is stapled (see drawing). 2. A low weight Sag-Depth Measuring Gauge equipped with spherical shaped measuring foo
3、t (3 mm dia) and a 0.4 N preload for measuring the depth of the sag with +/- 0.1 mm accuracy rating (see drawing). 3. An environmental exposure chamber capable of maintaining 38 +/- 2 OC and 5 +/- 1 OC temperature at a relative humidity of 98 +/- 2 %. The inner shelf dimensions must be a minimum of
4、500 x 500 mm. 4. Laboratory convection oven capable of maintaining a temperature of 80 +/-2 OC and with inner shelf dimensions of at least 500 x 500 mm. Conditioning and Test Conditions All test values indicated herein are based on material conditioned in a controlled atmosphere of 23 +/- 2 OC and 5
5、0 +/- 5 % relative humidity for not less than 24 h prior to testing and tested under the same conditions unless otherwise specified. I Date I Action I Revisions I Copynght02001, Ford Global Technologies, Inc FORD LABORATORY TEST METHOD EU-BN 025-01 Procedure Condition the material before test as spe
6、cified above. Note: Cutting out and stretching of the actual test specimens must be done under the same conditions. Place frame top side down, on the outer face side of the test material, and mark off the outside dimensions. Cut out the test specimen as indicated by the markings. Mark a guide line f
7、or alignment purposes in the centre of the test specimen in the longitudinal and transverse fabric directions, to ensure a uniform stretching over the frame. Align the test specimen on the frame, face side of material down, and staple on to the sides, in the longitudinal and transverse fabric direct
8、ions. Stretch the opposite sides until the initial sag reaches 1 .O mm to 3.0 mm. Attention must be paid to stretch the material evenly and without wrinkles. Measure the initial sag as follows: Place the depth gauge across the centre of the frame, using the edges of the frame for support (see drawin
9、g). Lower the measuring foot until it contacts the material under test. If initial sag is too great or too low, remove staples, and restretch the test specimen until specified initial sag values are obtained. After the depth of sag is measured, mark off the position of the depth gauge on the sides o
10、f the material, and remove the depth gauge. Storage Conditions Method A 16 h at 5 +/- 1 OC and 98 +/- 2 % relative humidity. Method B 16 h at 38 +/- 2 OC and 98 +/- 2 % relative humidity. Method C 4 h at 80 +/- 2 OC. Page 2 of 4 Copynght02001, Ford Global Technologies, Inc FORD LABORATORY TEST METHO
11、D EU-BN 025-01 6. After the required storage period, the final depth of sag must be measured as described in para 4, inside the test chamber and within 30 +/- 10 s after opening the cabinet door. Evaluation Subtract the original sag depth figure from the final one, and quote the value obtained as sa
12、g depth in mm. Note: For each of the prescribed three storage conditions (para 5), a new test specimen must be used. 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. Page 3 of 4 Copynght02001, Ford Global Technologies, Inc FORD LABORATORY TEST METHOD EU-BN 025-01 DETERMINATION OF WRINKLE FORMING TENDENCY OF TRIM COVERING MATERIALS Wood frame - i Specimen Staples 1 . Page 4 of 4 Copynght02001, Ford Global Technologies, Inc
