FORD FLTM BV 117-1-2000 WATER ABSORPTION TEST FOR ADHESIVES AND SEALANTS (Replaces FLTM BV 017-01).pdf

1、 FORD LABORATORY TEST METHOD BV 117-01 Date Action Revisions 2000 12 11 Revised Editorial no technical change A. Cockman 2000 03 07 Editorial no technical change A. Cockman 1992 02 03 Printed copies are uncontrolled Page 1 of 3 Copyright 2000, Ford Global Technologies, Inc. WATER ABSORPTION TEST FOR

2、 ADHESIVES AND SEALANTS Application This procedure is used to determine the amount of water absorption by adhesive and sealant materials. Note: This procedure may be used in conjunction with FLTM BV 108-02, Volume Change Test for Adhesives and Sealants. Apparatus Required Oven A mechanical convectio

3、n oven capable of obtaining a metal temperature of 200 C on CRLC steel within 8 - 10 minutes (Blue M Model No. POM-166A-GX or equivalent). Knife Surgical blade; Curtin-Matheson Scientific Catalog No. 079-657 (handle) and 079-681 (blade) or equivalent. Materials Required Panel CRLC steel; 300 x 300 x

4、 0.89 mm. Coupons 3 aluminum 100 x 25 x 1.14 mm coupons. Paper Towel Highly-absorbent towel. Conditioning and Test Conditions All test 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 t

5、esting and tested under the same conditions unless otherwise specified. FORD LABORATORY TEST METHOD BV 117-01 Page 2 of 3 Copyright 2000, Ford Global Technologies, Inc. Procedure 1. Weigh separately 3 100 x 25 x 1.14 mm aluminum coupons to the nearest mg in air (this weight is “Wc“). 2. Apply a semi

6、circular bead of material approximately 8 mm radius down the center of each coupon. Cut off each bead on both ends (to eliminate “necking“) to provide a 50 mm length of material (Figure 1). Note: The closed container of adhesive or sealant should be conditioned for 24 h at 23 +/- 2 C prior to applic

7、ation. 3. Bake the specimens in a mechanical convection oven at a metal temperature of 135 +/- 3 C for 8 minutes. Specimens are to be baked in a horizontal position, centrally located and protected from direct air flow. To assure the proper bake schedule, place the specimens on a 300 x 300 x 0.89 mm

8、 CRLC steel panel while in the oven. 4. Allow the specimens to cool at 23 +/- 2 C. Weigh each specimen to the nearest mg in air (this weight is “W2“). 5. Method A: Totally immerse the specimens in tap water* at 23 +/- 2 C for 22 h. Method B: Cut 2 crossing lines approximately 25 mm in length and 3 m

9、m in depth through the surface of the cured material bead. Totally immerse the specimens in tap water* at 23 +/- 2 C for 22 h. *Note: Distilled or deionized water shall not be used. 6. Remove the specimens from the water and lightly blot with a highly absorbent paper towel as rapidly as possible. 7.

10、 Immediately weigh each specimen to the nearest milligram in air (this weight is “W3“). 8. Calculate the percent water absorption as follows: Percent Water Absorption = W 3 W 2 x 100 W2 - Wc Where: Wc = weight of aluminum coupon W2 = weight of cured material and coupon W3 = weight of cured material

11、and coupon after water immersion 9. Repeat the above procedure except bake at a metal temperature of 205 +/-3 C for 30 minutes. 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 BV 117-01 Page 3 of 3 Copyright 2000, Ford Global Technologies, Inc. WATER ABSORPTION TEST FOR ADHESIVES AND SEALANTS Figure 1