Environmentally friendly moisture-proof paper with superior moisture proof property (I) - Properties of moisture proof chemicals

被引:0
|
作者
Yoo, Jae-Kook [1 ]
Jho, Wook-Kee [1 ]
Lee, Myoung-Ku [1 ]
机构
[1] Dept. of Paper Sci. and Engineering, College of Forest Sciences, Kangwon National University, Chunchon 200-701, Korea, Republic of
来源
Palpu Chongi Gisul/Journal of Korea Technical Association of the Pulp and Paper Industry | 2001年 / 33卷 / 04期
关键词
Adsorption - Bonding - Laminating - Latexes - Moisture - Polyethylenes - Tensile strength - Vapors;
D O I
暂无
中图分类号
学科分类号
摘要
The function of the moisture-proof paper is to prevent moisture from adsorbing into the packed goods. Water-vapor transmission rate of the moisture-proof paper should be less than 100 g/m2 &middot 24 hr and the optimum rate would be less than 50 g/m2 &middot 24 hr. In general the moisture-proof paper has been made by laminating polyethylene or polypropylene on top of the base paper. However this kind of moisture-proof paper has a problem in recycling so that it brings about environmental pollution. The purpose of this paper was to make moisture-proof paper using the mixture of SB latex and wax emulsion which was recyclable and environmentally friendly. Water vapor transmission rate showed less than 50 g/m2 &middot 24 hr in mixture ratio of 85:15, 87:13, 90:10. Especially the mixture ratio of 87:13 showed the most favorable water-vapor transmission rate. However, the moisture-proof layer was destroyed slightly by folding in packing. It had been observed that there was no close relationship between water-vapor transmission rate of the moisture-proof paper and grammage of the base paper, but the density of base paper had influenced on water vapor transmission rate. It was also observed that the moisture-proof paper could be recycled. The moisture-proof paper was similar to base paper in degree of the pulping, and there was no significant difference in dispersion between moisture-proof paper and base paper. Most of wax particles which caused the spots during drying process could be removed by flotation process. Tensile strength and tear strength of both moisture-proof paper and base paper after pulping were measured to examine the fiber bonding, and no significant difference in physical properties was observed.
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页码:15 / 20
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