表面施胶水性聚氨酯对箱纸板耐折性能的影响及作用机理  

Effect and Mechanism of Waterborne Polyurethane on the Folding Endurance of Liner Board by Surface Sizing

作　　者：马朴 杨云艳 马玉芹 徐芳 吴闻达 郭丽芳 黄军 MA Pu;YANG Yunyan;MA Yuqin;XU Fang;WU Wenda;GUO Lifang;HUANG Jun(Jining Nantian Nongke Chemical Co.,Ltd.,Jining,Shandong Province,272200;Nanjing Tianjiabing Senior High School,Nanjing,Jiangsu Province,210000;Nanjing Dingzhao New Material Technology Research and Development Co.,Ltd.,Nanjing,Jiangsu Province,210000)

机构地区：[1]济宁南天农科化工有限公司,山东济宁272200 [2]南京田家炳高级中学,江苏南京210000 [3]南京鼎兆新材料技术研发有限公司,江苏南京210000

出　　处：《中国造纸》2024年第4期146-154,共9页China Pulp & Paper

摘　　要：通过表面施胶不同特性(非离子型和阳离子型)的水性聚氨酯(WPU),研究了WPU施胶对箱纸板耐折性能的影响及作用机理。结果表明,WPU成膜性能、纸张结构和施胶工艺,对箱纸板耐折性能均有显著影响。非离子型的WPU-A膜强韧,拉伸强度达7.11 MPa;阳离子型的WPU-B膜中软易黏,拉伸强度很低。对于含水量低的纸张,在同等实验条件下,成膜柔韧、拉伸强度高的WPU施胶,有利于提高箱纸板的耐折性能。纸张结构越疏松,WPU施胶对其耐折度的提升幅度越大,且对于结构紧实的纸张,WPU膜强度与纸张强度显示出协同作用。对比4种不同施胶工艺所得箱纸板,干燥后双面施胶箱纸板的耐折性能提升效果最佳。The effects and mechanisms of waterborne polyurethane(WPU)with different charactristics(non-ionic and cationic)surface siz-ing on the folding endurance of liner board were studied.The results showed that the WPU film-forming properties,paper structure,and siz-ing process had a significant impact on the folding endurance of liner board.The non-ionic WPU-A film was highly elastic and resilient,with a tensile strength of 7.11 MPa,while the cationic WPU-B film was soft and sticky,with low tensile strength.For paper with low water con-tent,under the same experimental conditions,sizing by WPU with high flexibility and tensile strength was beneficial to improve the folding resistance of liner board.The greater the enhancement of folding endurance by WPU sizing for the looser the paper structure,and the WPU film strength and paper strength showed synergistic effects for tightly structured paper.Comparing the liner board made by four different siz-ing processes,the best folding endurance improvement was achieved by the double-sided sizing liner board after drying.

关 键 词：表面施胶剂 水性聚氨酯 箱纸板 耐折性能 

分 类 号：TS727.5[轻工技术与工程—制浆造纸工程]