纸基打包带的制备及其性能研究

Preparation and Performance of Paper⁃based Strapping Tape

本研究以本色针叶木浆为原料,通过浆内添加湿强剂聚酰胺环氧氯丙烷(PAE)、烷基烯酮二聚体(AKD)、阳离子淀粉以及70℃水溶性聚乙烯醇(PVA)纤维的方法,提高纸基打包带的相关强度性能,在最适打浆度(30°SR)下制备定量为120 g/m^(2)的纸基打包带,然后利用免扣热熔打包机对纸基打包带进行热封黏合实验;探究了干燥温度、造纸助剂添加量以及70℃水溶性PVA纤维对纸基打包带物理性能、热封温度、热封时间及热封强度的影响。结果表明,当干燥温度95℃,湿强剂PAE添加量2%,施胶剂AKD添加量0.3%,阳离子淀粉添加量1.2%,70℃水溶性PVA纤维添加量15%,热封温度165℃,热封时间6 s时,纸基打包带的干抗张指数达90.3 N·m/g,湿抗张指数达26.3 N·m/g,撕裂指数达19.6 mN·m^(2)/g,耐破指数达6.45 kPa·m^(2)/g,热封处的抗张指数,高达99.2 N·m/g。

This study used natural color softwood pulp as raw material,and improved the relevant strength properties of handsheets by add‐ing papermaking additives such as polyamide epichlorohydrin(PAE),alkyl ketene dimer(AKD),cationic starch,and 70℃water-soluble polyvinyl alcohol(PVA)fiber to prepare paper-based strapping tape(PST)with a basis weight of 120 g/m^(2) at the optimal beating degree(30°SR),using a buckle free hot melt packaging machine to conduct heat sealing and bonding experiments on the PST.The effects of dry‐ing temperatures,dosage of paper additives and 70℃water-soluble PVA fibers on the physical properties,heat sealing temperature,heat sealing time,and heat sealing strength of PST were explored.The results showed that when the drying temperature was 95℃,the dosage of wet strength agent PAE was 2%,the dosage of sizing agent AKD was 0.3%,the dosage of cationic starch was 1.2%,the dosage of water-sol‐uble PVA fiber at 70℃was 15%,the heat sealing temperature was 165℃,and the heat sealing time was 6 s,the dry tensile index of PST reached 90.3 N·m/g,the wet tensile index reached 26.3 N·m/g,the tear index reached 19.6 mN·m^(2)/g,the rupture index reached 6.45 kPa·m^(2)/g,and the tensile strength at the heat seal was as high as 99.2 N·m/g.