The Scavenging Effect of Resorcinol on the Formaldehyde Release from the Urea Formaldehyde Adhesive Bonded Plywood

합판용(合板用) 요소수지접착제(尿素樹脂接着劑)의 리조시놀 첨가(添加)에 따른 유리(遊離)포름알데히드 방산(放散) 제거효과(除去效果)

This study is carried out to determine the scavenging effect of resorcinol added into the urea formaldehyde resin on the formaldehyde release of plywood, as the preliminary study of using the phenolic substances. The method for formaldehyde determination used in this report is the improved chromotropic acid determination. The results are summarized as follows: 1. Resorcinol added into the urea formaldehyde adhesive acts as a good scavenger. 4 percent of resorcinol reduced the formaldehyde release to less than half content. 2. Adding resorcinol gave better glue shear strength than that of control, showing the peak of the shear strength, at 2 percent and decreased to the same strength as control along its content of 4 percent. 3. Moisture content of air dried plywood met the standard very well.