Journal of the Korean Wood Science and Technology
- Volume 17 Issue 2
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- Pages.20-25
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- 1989
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- 1017-0715(pISSN)
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- 2233-7180(eISSN)
Plywood Properties by PEG Treatment Conditions on Veneer
단판(單板)의 PEG 처리조건(處理條件)에 따른 합판(合板)의 성질(性質)
- Suh, Jin-Suk (Forestry Research Institute) ;
- Doh, Geum-Hyun (Forestry Research Institute)
- Received : 1989.03.15
- Published : 1989.06.30
Abstract
This study was carried out in order to investigate the treatment effect of PEG soln which is a common dimensional stabilizer to green log. sawing panel etc, on bonding product including plywood widely-used in secondary processing unit. The 30% concentration of aqueous PEG soln. with molecular weight of 400, 1.000 and 4,000 were prepared respectively, and also dipping the veneer in the PEG soln. spreading the PEG soln. on veneer and mixing the PEG soln. in the adhesive were allowed. Then the ratio of PEG impregnation on veneer, the adhesive strength of plywood were epitomized as follows: The ratio of impregnation by PEG 4,000 at dipping condition was highest. while that by PEG 400 at same condition was lowest. However, the effect of PEG molecular weight on the ratio of impregnation at spreading condition did not occur. 2. The adhesive strength was great in the order of 4,000>400>1,000 in molecular weight of PEG at dipping and spreading conditions. In case of mixing the PEG soln. in the adhesive, the adhesive strength was great in the order of 400>1,000>4,000 in molecular weight of PEG. Throughout three treatment conditions, PEG 400 was relatively favourable with about 10kg/
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