1、BN 015-02 FORD LABORATORY TEST METHOD Date Action COMPRESSION AND RECOVERY OF TEXTILE MATERIALS Revisions Application 2001 0822 1992 07 07 This method is used to measure the compression and recovery of fiber padding and similar materials in the normal and aged condition. Revised Editorial - no techn
2、ical change A. Cockman Apparatus Required Steel Plate 125 x 125 mm x 3 mm weighing 280 g. Compress ion Tester A compression machine capable of compressing the specimen at a constant rate of 50 mm/minute. The instrument must indicate the load applied and may be motor or hand driven. A compression tes
3、ter with dead weights applied as shown in Figure 1, 2, & 3 can be used. Mechanical Convection Oven Capable of maintaining a constant temperature of 82 +/- 2 OC. Conditioning and Test Conditions All test values indicated herein are based on material conditioned in a controlled atmosphere of 23 +/- 2
4、OC 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 - Compression and Recovery - Normal 1. Cut 100 x 100 mm specimens at random from across the width of the roll and build up to a pile not les
5、s than 25 mm in thickness. 2. Place the 125 x 125 mm steel plate over the pile and place in the compression tester. (See Figure 1 .) Copyright02001, Ford Global Technologies, Inc FORD LABORATORY TEST METHOD BN 015-02 3. Apply a 22 N load for one minute. If the dead weight compression tester as shown
6、 in Figure 2 is used, apply the load gradually without impact until the load is supported by the test specimen. Remove the load and measure the thickness of the sample at the center or corners of the four sides of the steel plate. Compute the average of these values and record as thickness TI 4. App
7、ly a load of 334 N at the rate of 50 mm/minute (when using the compression machine), lock the scale and again measure the compressed height of the sample as in step 3 and record as compression thickness T2. If the dead weight compression tester is used, apply the 334 N load gradually without impact
8、until the load is supported by the test specimen. (See Figure 3.) 5. Hold at the 334 N load for 5 minutes, remove load and allow to recover for 5 minutes with the steel plate still on the sample. Measure and record therecovered thickness of the specimen as in Step 3 and record as T3 Method B - Compr
9、ession and Recovery after Aging 1. Cut 1 O0 x 1 O0 mm specimens at random from across the width of the roll. 2. Age test specimens for 24 h at 82 +/- 2 OC in the oven, and then allow to stand for 30 minutes at 23 +/- 2 OC and relative humidity of 50 +/- 5 %. 3. Build up the specimens into a pile not
10、 less than 25 mm thick. 4. Continue the test as described in Method A, Steps 2 through 5. Evaluation Calculate the compression and recovery of the specimen for both Method A and B as follows: % Compression = T, - T, x 100 TI % Recovery = T, - T2 x 1 O0 TI - T2 Chemicals, materials, parts, and equipm
11、ent referenced in this document must be used and handled properly. Each party is responsible for determining proper use and handling in its facilities. Page 2 of 5 Copynght 02001, Ford Global Technologies, Inc FORD LABORATORY TEST METHOD BN 015-02 COMPRESSION AND RECOVERY OF TEXTILE MATERIALS Figure
12、 1 Page 3 of 5 Copynght 02001, Ford Global Technologies, Inc FORD LABORATORY TEST METHOD BN 015-02 COMPRESSION AND RECOVERY OF TEXTILE MATERIALS Figure 2 Page 4 of 5 Copynght 02001, Ford Global Technologies, Inc FORD LABORATORY TEST METHOD BN 015-02 COMPRESSION AND RECOVERY OF TEXTILE MATERIALS Figure 3 Page 5 of 5 Copynght 02CQ1, Ford Global Technologies, Inc
