快干耐水型氧化改性淀粉胶黏剂的研制

针对目前企业纸板生产线用淀粉胶黏剂在雨季潮湿气候普遍存在的纸板偏软、干燥速度慢、黏合不良现象增多等问题,以木薯淀粉为原料、过硫酸氢钾为氧化剂,并添加复合填料和三聚氰胺甲醛树脂,采用冷制法制备了一种快干耐水型的氧化改性淀粉胶黏剂。通过改性试验,得出在淀粉中添加相当于其质量的0.3%的过硫酸氢钾,5%的复合填料,4%的三聚氰胺甲醛树脂时,所制得的淀粉胶黏剂的性能较好。研究发现:选用过硫酸氢钾为氧化剂,不仅能弥补常用氧化剂的不足之处,而且能缩短胶黏剂的生产周期;通过复合填料和三聚氰胺甲醛树脂的改性,不仅能提高瓦楞纸板的黏合强度和边压强度,改善淀粉胶黏剂的干燥速度和胶黏抗水性,而且能降低胶黏剂的生产成本。

Study on Quick Dry Water Resistant Type Oxidation Modification Starch Adhesive

There existing some problems in corrugated cardboard producing enterprises, such as the softening, slow drying and poor cohesion in rainy season and humid climate. Cassava starch was prepared as the raw material, while potassium monopersulfate was used as oxidant, with composite fillers and melamine formaldehyde resin added into it. A quick-drying, water resistant oxidized starch adhesive was prepared via cold method. Through the modification test, when the added material in starch is equivalent to the quality of 0.3% of potassium monopersulfate, 5% of the composite fillers, 4% of melamine formaldehyde resin, the performance of the starch adhesive proved better. And the result showed that with the potassium monopersulfate as oxidiant, it could not only make up for the normal oxidant deficiencies, but also shorten the adhesive production cycle. After the modification of composite fillers and melamine formaldehyde resin, the bonding strength, edgewise crush resistance, drying rate of starch adhesive and adhesive water resistance of the corrugated cardboard were improved, with the production cost of adhesive reduced as well.