木材科学与技术2023，Vol.37Issue(6)：53-60,8.DOI:10.12326/j.2096-9694.2023087
施胶方式对不同密度刨花层积材性能的影响
Effect of Glue Spreading Methods on the Properties of Laminated Strand Lumber with Different Densities
摘要
Abstract
The effects of glue spreading methods on the density profile,resin distribution,water resistance,and bending properties of laminated strand lumber(LSL)with different densities were investigated using Pinus radiata strands and phenolic resin as raw materials.The results indicated that the resin content on the surface of the strand and the penetration depth of the resin into the strand were different when two spreading methods were applied.The resin prepared by the dipping method penetrates the strands,which was conducive to the reinforcement of the strands.The surface on the strands prepared by the spraying method had higher resin content,which was conducive to the formation of a good gluing interface between the units.As the density elevated from 0.80 g/cm3 to 1.00 g/cm3,the glue spreading methods significantly affected the bending properties and water absorption of LSL,while there was no significant effect on the thickness swelling rate of LSL.When the density was 1.00 g/cm3,the LSL prepared by the dipping method had a higher MOE(19.9 GPa).Nevertheless,it was susceptible to delamination within the adhesive layer situated between the strands during the water resistance test.The LSL prepared by spraying method had a higher MOR(126.8 MPa),and the glue layer between the strands was less prone to delamination in the water resistance test.关键词
刨花层积材/浸胶/喷胶/耐水性能/抗弯性能/剖面密度/树脂分布Key words
laminated strand lumber(LSL)/glue-dipping/glue-spraying/water resistance/bending property/density profile/adhesive distribution分类
轻工纺织引用本文复制引用
王小霞,葛立军,齐越,于文吉..施胶方式对不同密度刨花层积材性能的影响[J].木材科学与技术,2023,37(6):53-60,8.基金项目
"十四五"国家重点研发计划课题"高强度定向结构板制造与应用技术"(2021YFD2200602). （2021YFD2200602）
