PRF, MUF 집성재의 휨 강도와 접착 성능 평가

The Bending Strength and Adhesive Properties of PRF and MUF Glulam

As glulam is a woody material, it is necessary to be more careful in a gluing process. It takes 6-7 hours at 40-60 ℃ to harden PRF resin used in making structural glulam, and about 24 hours at room temperature. In the present process which can not use a press continuously, reducing the hardening time is necessary to increase production. The experiment was done to compare the adhesive properties of PRF resin and MUF resin through bending test, block shear strength test and water soaking test. In comparing the bending strength of prediction MOE is 1.2 times higher that actual MOE. PRF and MUF do not show significant difference in MOE and MOR, and in block shear strength test, such as shear strength and wood failure rate. However, in water soaking and boiling water soaking tests PRF and MUF show the significant difference in delamination rate.