纸基打包带的制备及其性能研究

Preparation and Performance of Paper-based Strapping Tape

关键词:  纸基打包带  水溶性PVA纤维  热封性  本色针叶木浆

Key Words:paper-based strapping tape  water soluble PVA fiber  heat sealing performance  natural color softwood pulp

摘要: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/m²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·m²/g，耐破指数达6.45 kPa·m²/g，热封处的抗张指数，高达99.2 N·m/g。

Abstract:This study used natural color softwood pulp as raw material， and improved the relevant strength properties of handsheets by adding 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/m² 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 drying 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-soluble 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·m²/g， the rupture index reached 6.45 kPa·m²/g， and the tensile strength at the heat seal was as high as 99.2 N·m/g.