DELAMINATION TEST – GB/T 17657-1999 (4.17) (adapted)
1. TOOLS
1.1 Constant temperature water tank
1.2 Equipment for drying wood, temperature range of 40~200 ° C, with a +/-1 ° C tolerance
1.3 A steel ruler accurate to 1 mm
2. SAMPLING
We cut three 400x400 mm mother samples from 1 sheet
We then cut two 75x75 mm final samples from each 400x400 mm mother sample and get six 75x75 mm final samples for testing
3. TESTING PROCEDURE
TYPE I. Moisture and water proof panels suitable for external conditions
① Inmerse samples in 100 degrees water for 4 hours
② Dry samples at 63+/-3 degrees for 20 hours
③ Inmerse samples in 100 degrees water for 4 hours
④ Dry samples at 63+/-3 degrees for 3 hours
TYPE II. Moisture proof panels partially suitable for external conditions
① Inmerse samples in 63+/-3 degrees water for 3 hours
② Dry samples at 63+/-3 degrees for 3 hours
TYPE III. Panels suitable for dry conditions (not moisture proof)
① Inmerse samples in 30+/-3 degrees water for 2 hours
② Dry samples at 63+/-3 degrees for 3 hours
 
4. ASSESSING TEST RESULTS
Disregard:
· delamination < 3 mm
· delamination ocurring on overlaps or similar defect
4.1 For each sample and side, no glue line shall have accumulated delamination exceeding 25 mm. Delamination of less than 3 mm shall not be taken into account
4.2 Minimum 5 out of 6 samples should pan the rest
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