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林业科学 ›› 2003, Vol. 39 ›› Issue (1): 132-139.doi: 10.11707/j.1001-7488.20030122

• 论文及研究报告 • 上一篇    下一篇

制造工艺因素对刨花板吸水厚度膨胀率的影响

顾继友 高振华 谭海彦   

  1. 东北林业大学材料科学与工程学院,哈尔滨150040
  • 收稿日期:2001-01-24 修回日期:1900-01-01 出版日期:2003-01-25 发布日期:2003-01-25

THE EFFECTS OF ALL MAIN MANUFACTURING FACTORS ON THE THICKNESS SWELLING IN PARTICLEBOARD

Gu Jiyou,Gao Zhenhua,Tan Haiyan   

  1. Material Science and Engineering College,Northeast Forestry University\ Harbin150040
  • Received:2001-01-24 Revised:1900-01-01 Online:2003-01-25 Published:2003-01-25

摘要:

结合众多实验结果,讨论了刨花板制造工艺中12个主要因素———热压温度、热压时间、热压压力、板的密度、刨花含水率、施胶量、施蜡量、胶粘剂种类、刨花形态、刨花原料种类、刨花预处理、成板的二次压制处理对刨花板吸水厚度膨胀率的影响。结果表明,降低刨花板的2 4h吸水厚度膨胀率要通过降低其不可逆厚度膨胀率获得,而降低不可逆厚度膨胀率的实质是尽量以非膨胀功耗能释放内应力,减少粘弹性变形和胶接点破坏。研究还表明,上述12个制板要素中,除施蜡量外,都对不可逆厚度膨胀率有很大的影响,因此选择合理的制板工艺因素对刨花板的尺寸稳定性很重要。

关键词: 刨花板, 厚度方向变形, 吸水厚度膨胀率, 不可逆厚度膨胀率

Abstract:

Based on many results from experiments,the paper discussed the effects of 12 main factors of manufacturing particleboard on the thickness swelling and irreversible thickness swelling,which are hot-pressing temperature,hot-pressing time,hot-pressing pressure,density,moisture content of particles,resin consumption,wax consumption,adhesive species,particle geometry,particle species,particle pre-treatment and double pressing for particleboard.It showed that the reduction of 24 h TS of particleboard is by way of reducing its ir TS.And the essence of reducing ir TS is to release the internal stress by mains of discharging Non-expansion-work energy,to lessen the quantity of visco-elastic deformation and to decrease the destuction of bonding points.It aslo showed that all main factors except wax consumption have great effects on ir TS of particleboard,as a result,it is very important to choose the right conditions for manufacturing the particleboard with good demension stability.

Key words: Particleboard, Deformation in thickness, TS, ir TS