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Research on Preparation of a Heat-sealing Sack Paper |
Received:February 18, 2022 |
DOI:10.11980/j.issn.0254-508X.2022.09.006 |
Key Words:sack paper wet strength PVA fiber heat sealing property |
Fund Project:科技部重点研发计划(2017YFB307901)。 |
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Abstract:In this study, unbleached softwood pulp and unbleached bamboo pulp were used as raw materials to fabricate sack paper with adding polyamide polyamine epichlorohydrin (PAE) and alkyl ketene dimer (AKD) in the pulp to improve the wet strength and water resistance. After adding polyvinyl alcohol (PVA) fiber to the pulp, the heat-sealing performance of the paper was realized, and the influence of the amount of PVA fiber, the heat-sealing temperature, and the heat-sealing time on the adhesive strength of the sack paper were explored. The results showed that the suitable beating degree of unbleached softwood pulp and unbleached bamboo pulp were 32°SR and 27°SR, respectively, whose optimum mass ratio was 7∶3; the optimum addition amount of PAE and AKD were 1.5% and 0.3%, respectively. When the amount of PVA fiber was 9%, the heat-sealing temperature 110℃, and the heat-sealing time 6 s, the adhesive strength could reach 2.61 kN/m, tear index 14.7 mN·m2/g, dry and wet tensile index 72.9 and 23.4 N·m/g, respectively. |
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