包装论文：耐水增强剂对无载体淀粉胶性能影响的研究

摘  要

介绍了无载体淀粉胶粘剂的制备原理和制备工艺,着重论述了增强剂P、H、R和耐水剂三聚氰胺、PVA、脲醛胶粘剂对无载体淀粉胶粘剂性能的影响。用不同重量的增强剂P、H、R及耐水剂三聚氰胺、脲醛胶粘剂、PVA分别对无载体淀粉胶粘剂进行条件实验，确定了复合增强剂的配比为P：H：R=4：3：1，复合耐水剂的配比为PVA：脲醛胶粘剂=1：8。实验结果显示：用8%复合增强剂（按淀粉重量百分比，以下均同），9%复合耐水剂制备的无载体淀粉胶粘剂的粘度为36.5秒（国家标准30～50秒），初粘力为99.5%，用该胶粘制的瓦楞纸板的耐水性能达到72.5小时，粘结强度为1910 N/m边压强度为3730 N/m。超过了东莞海富纸品有限公司生产的同纸质瓦楞纸板的粘结强度(1800N/m)和边压强度(3500N/m)。
该胶粘剂不分层，不沉底。用该胶粘制的瓦楞纸板不发软，不返潮，是一种性能较好的淀粉胶粘剂。

关键词：淀粉胶粘剂, 粘度，增强剂, 耐水剂
 
ABSTRACT

This paper describes the preparation mechanism and technique for no-support starch adhesive. Our research focuses on the impact of reinforcing agents P, H and R and water resistant agents melamine, urea-formaldehyde adhesive and PVA on the viscosity, early viscosity, water resistance, bond strength and compressive strength of no-support starch adhesive. The condition experiments were carried out using different amount of reinforcing agents P, H and R and water resistant agents melamine, urea-formaldehyde adhesive and PVA and so on to study their effects on the no-support starch adhesive. After analyzing the results, the optimal weight ratio of reinforcing agent P: H: R is 4: 3: 1 and the optimal weight ratio of water resistant agent PVA: urea-formaldehyde adhesive is 1: 8. The viscosity of no-support starch adhesive with 9% of the optimized ratio of composite water resistant agent is 36.5 seconds. Its initially stick force is 99.5%. The corrugated cardboards made with this adhesive have water resistant performance of 72.5 hours, bond strength of 1910 N/m, and compressive strength of 3730 N/m. The corrugated boards made by the Haifu Paper Packaging Ltd have adhesive bond strength of 1800 N/m and compressive strength of 3500 N/m. This adhesive has stable performance. The corrugated board made with this adhesive dries very quickly, and has good water resistance. All of these results indicate that this adhesive is an ideal starch adhesive.

Keywords: Starch adhesive, Viscosity, Reinforcing agents, Water resistant agent

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