| 胶合板用改性脲醛树脂预压强度的研究 |
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| 引用本文： | 韩书广,刘启明,杜以诚.胶合板用改性脲醛树脂预压强度的研究[J].木材工业,2002,16(3):12-14. |
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| 作者姓名： | 韩书广 刘启明 杜以诚 |
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| 作者单位： | 南京林业大学木材工业学院，南京 210037 |
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| 摘 要： | 本研究采用三聚氰胺及PVA对脲醛树脂进行改性，探讨改性脲醛树脂的合成工艺和性能与预压强度的关系。结果表明，较大三聚氰胺加量不利于板坯预压强度的提高；PVA能明显改善树脂的初粘性，但初粘性不决定预压强度；反应终点温度对预压强度影响较大，粘度对预压强度的影响并不显著；高固体含量树脂的预压强度低；较快固化的树脂预压强度较好；低醛树脂中的游离甲醛对预压强度影响不显著。
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| 关 键 词： | 胶合板 改性 脲醛树脂 预压强度 |
| 文章编号： | 1001-8654(2002)03-0012-03 |
Study on Prepressing Intension of Modified UF Resin for Plywood |
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| HAN Shu guang,LIU Qi ming,DU Yi cheng.Study on Prepressing Intension of Modified UF Resin for Plywood[J].China Wood Industry,2002,16(3):12-14. |
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| Authors: | HAN Shu guang LIU Qi ming DU Yi cheng |
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| Abstract: | The urea formaldehyde (UF) resin for plywood was modified with melamine and polyvinyl alcohol (PVA). The effects of modified UF resin makings including final molar ratio, quantity of melamine, PVA and final temperature, and property indexes including viscosity, solid content and free formaldehyde content on prepressing intension of assembled mat were studied. Results showed that larger quantity melamine had no advantage of improving the prepressing intension, and PVA could help to increase original viscosity obviously, but the original viscosity could not determine the prepressing intension. The high temperatures of final reaction and short curing time were good for the prepressing intension, but prepressing intension decreased with solid content of resin increased. The low free formaldehyde content had little effect on prepressing intension. |
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| Keywords: | Melamine urea formaldehyde resin (MUF) Prepressing intension |
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