1、 FORD LABORATORY TEST METHOD BN 015-01 Date Action Revisions 2000 08 30 Revised Editorial no technical change A. Cockman 2000 07 11 Editorial no technical change A. Cockman 1992 07 07 Printed copies are uncontrolled Page 1 of 4 Copyright 2000, Ford Global Technologies, Inc. COMPRESSION AND RECOVERY
2、OF TEXTILE MATERIALS Application This method is used to measure the compression and recovery of fiber padding and similar materials of high compressibility in the normal condition and after water soak. Apparatus Required Aluminum Plate 125 x 125 mm Weighing 85 g Compression Tester A compression mach
3、ine capable of compressing the specimen at a constant rate of 50 mm/minute. The instrument must indicate the load applied. A dead weight compression tester. Water Tank Containing distilled or deionized water. Size must be suitable to enable a total immersion of the test specimen. Mechanical Convecti
4、on Oven Capable of maintaining a constant temperature of 102 +/ - 3 C. Materials Required Deionized or Distilled Water 10 pp m max. Total dissolved solids (ASTM D 1888) Conditioning and Test Conditions All test values indicated herein are based on material conditioned in a controlled atmosphere of 2
5、3 +/ - 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. FORD LABORATORY TEST METHOD BN 015-01 Page 2 of 4 Copyright 2000, Ford Global Technologies, Inc. Procedure Method A Compression and Recovery Normal 1.
6、Cut 100 x 100 mm specimens at random from across the width of the roll and build up to a pile not less than 25 mm in thic kness. 2. Place the aluminum plate over the pile as shown in Figure 1 for the dead weight compression tester and measure the thickness of the specimen at the center or corners of
7、 the four sides of the aluminum plate. Compute the average of these values a nd record as thickness T 1 . 3. Place the assembly in the compression tester and apply a load of 53 N for one minute as shown in Figure 2 for the dead weight compression tester. If the dead weight compression tester as show
8、n in Figure 2 is used, apply the load gradually without impact until the load is supported by the test specimen. Measure the compressed thickness of the specimen under the 53 N load as in Step 2 and record the average as T 3 . 4. Remove the 53 N load and allow to recover for three minutes with the p
9、late still on the specimen. Measure the recovered thickness of the specimen as in Step 2 and record the average as T 3 . 5. Calculate the compression and recovery as follows: % Compression = T 1 T 2 x 100 T 1 % Recovery = T 3 T 2 x 100 T 1 T 2 Method B Recovery After Water Soak 1. Determine and reco
10、rd original thickness T 1 as described in Method A, Steps 1 and 2. 2. Remove plate and immerse specimen in distilled (or deionized) water for one minute. 3. Shake out excess water, replace plate and proceed as in Method A, Step 3 to obtain compression thickness T 2 . 4. Remove the load and plate, se
11、parate the specimens and dry in the oven for one h at 102 +/- 2 C and then allow to obtain standard conditions at 23 +/ - 2 C and relative humidi ty of 50 +/ - 5 %. 5. Build up the specimens into a pile, replace the 85 g plate and after 3 minutes measure the recovered thickness of the specimen per M
12、ethod A, Step 2 and record the average as T 3 . 6. Calculate the recovery as follows: % Recovery aft er Water Soak = T 3 T 2 x 100 T 1 T 2 Chemicals, materials, parts, and equipment referenced in this document must be used and handled properly. Each party is responsible for determining proper use an
13、d handling in its facilities. FORD LABORATORY TEST METHOD BN 015-01 Page 3 of 4 Copyright 2000, Ford Global Technologies, Inc. COMPRESSION AND RECOVERY OF TEXTILE MATERIALS Figure 1 FORD LABORATORY TEST METHOD BN 015-01 Page 4 of 4 Copyright 2000, Ford Global Technologies, Inc. COMPRESSION AND RECOVERY OF TEXTILE MATERIALS Figure 2
