| 杨木单板层积木一步和二步压制方法的比较 |
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| 引用本文： | 韦益民,刘正添.杨木单板层积木一步和二步压制方法的比较[J].北京林业大学学报,1993,15(4):112-117. |
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| 作者姓名： | 韦益民 刘正添 |
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| 作者单位： | 北京林业大学森林工业学院
(韦益民，刘正添)，北京林业大学森林工业学院(郝丙业) |
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| 摘 要： | 本文研究了两种制造单板层积木(LVL)的方法:一步压制法,将12张单板一次热压或冷压成厚板;二步压制法,先用热固胶将4张单板热压成薄板,然后将3块薄板用冷固胶冷压成12层厚板.结果证明,二步压制的LVL质量较好,特别是厚度方向的力学性能的均匀性好.
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| 关 键 词： | 杨木单板层积木 脲醛树脂胶 苯酚-间苯二酚-甲醛树脂胶 一步压制法 二步压制法 |
Comparison of One-Step and Two-Step Pressing Method for Making Laminated Poplar Veneer Lumber |
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| Wei Yimin Liu Zhengtian Hao Bingye.Comparison of One-Step and Two-Step Pressing Method for Making Laminated Poplar Veneer Lumber[J].Journal of Beijing Forestry University,1993,15(4):112-117. |
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| Authors: | Wei Yimin Liu Zhengtian Hao Bingye |
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| Abstract: | This paper deals with one-step or two-step pressing method for making laminated poplar veneer lumber,12 plies are pressed once in hot or cold press when one-step pressing method is used.With the two-step pressing method,at first,four-ply thin LVL is produced in hot press when urea-formaldehyde resin is applied,and then,3 pieces of the thin LVL are glued together by phenol-resorcin-formaldehyde resin in cold press.Results show that the qualities of LVL made by two-step pressing method are better than those by one-step.Specially,rather uniform mechanical properties across thickness are found in the LVL made by two-step pressing method. |
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| Keywords: | laminated poplar veneer lumber urea-formaldehyde resin phenol-resorcin-formaldehyde resin one-step pressing method two-step pressing method |
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