|
|
| About Freeword: "plywood" |
| List | Prev. | Next |
| PDF : |  06040165.pdf |
| title(En) : | Researches on Blood Glue. XIII. On Mixed Glue of Urea Formaldehyde Resin and Blood Glue. |
| author(En) : | Tojun Takashima, Kazuhiko Ariga, Mitsuo Chubachi |
| information : | Mokuzai Gakkaishi 6(4), 165-170 (1960) |
| assort : | Original Article |
| summary(En) : | This report deals with the results of adhesive strength and water resistance of hot press plywoods bonded with urea formaldehyde resin (trade name, Uloid No. 22) mixed with blood glues or with the blood glues mixed with urea formaldehyde resin, the effect of amount of acidic hardener added to the mixed glue, its pot life and aging of the film obtained by spreading the glue mixture. With the urea formaldehyde resin mixed with a small amount of blood glue, we recognized neither remarkable deterioration nor notable promotion in gluing strength and water resistance as compared with those of unmodified resin, Uloid No. 22. However, those of plywood bonded with blood glue mixed with a small amount of urea formaldehyde resin were not better than those of the blood glue only. But it seems that a considerable addition of the blood glue to urea formaldehyde resin improves remarkably the boiling water-resistant property of the plywood; however, it drops according to the decrease of the amount of the blood glue. And then we recognized, within the limit of this experiment, that the adhesive strength and water resistance of plywood did not depend on the amount of acidic agent (NH4Cl) used as a hardener. One of the effects of adding blood glue to urea formaldehyde resin was to prolong the pot life of the glue mixture, and the other was to improve the aging property of the glue film. |