Studies on the Bond Durability of Oriented Particleboards.

Research Project

Project/Area Number	63460209
Research Category	Grant-in-Aid for General Scientific Research (B)
Allocation Type	Single-year Grants
Research Field	林産学
Research Institution	Shizuoka University
Principal Investigator	SAITO Fujiichi Shizuoka Univ. Agriculture Professor, 農学部, 教授 (20022163)
Co-Investigator(Kenkyū-buntansha)	SUZUKI Shigehiko Shizuoka Univ. Agriculture Assistant, 農学部, 助手 (40115449)
Project Period (FY)	1988 – 1989
Project Status	Completed (Fiscal Year 1989)
Budget Amount *help	¥2,900,000 (Direct Cost: ¥2,900,000) Fiscal Year 1989: ¥1,000,000 (Direct Cost: ¥1,000,000) Fiscal Year 1988: ¥1,900,000 (Direct Cost: ¥1,900,000)
Keywords	Particle geometry / Bond durability / Oriented particleboard / Structural particleboard / 配向性パーティクルボード
Research Abstract	In order to investigate the bond durability of oriented strandboard(OSB), the behavior of laboratory-made boards from different furnish and commercial structural panels were examined after a vacuum-pressure-soak-drying (VPSD) treatment. 1. Effect of the specific gravity of furnish on bond durability of OSB. Boards from lighter furnish had greater internal bond(IB) strength. After ten cycles VPSD treatment, boards from the.heaviest furnish had the largest springback and the smallest percent of retention in bending properties and IB strength. 2. Bond durability of structural particleboards. Although OSB was far superior in IB retention than waferboard, both OSB and waferboard had similar stable bending property retentions. The results indicated that besides IB strength, sound flakes without failures and their large contact areas provide positive effects on durable bending properties. 3. Effect of particle geometry on properties of OSB. During the board making process, large flakes suffered more damage.than small flakes. At the same slenderness ratio( particle length/thickness), no difference was observed on dry bending properties between boards from large flakes and small flakes. But small flakes showed higher retention in properties than large flakes after the VPSD treatment. With the same slenderness ratio of flakes, boards from small flakes exhibited greater bond durability than boards from large flakes.