Moisture resistance and waterproofness of paper packaging materials
DOI:
https://doi.org/10.31617/2.2023(46)08Keywords:
paper packaging materials, polyamideamineepichlorohydrin, polyvinyl alcohol, urea, formation of properties, moisture resistance, waterproofing.Abstract
Introduction. Polyamideamineepichlorohydrin (PAE) is one of the most commonly used wet strength agents.
Problem. Moisture resistance and waterproofness of paper packaging material is determined by the combination of properties of the applied composition, as well as the method of its application.
The aim of the research is to form the barrier properties of paper packaging materials obtained by treating the base paper with compounds based on polyamideamine epichlorohydrin.
Methods. The base paper was subjected to surface treatment with compositions using aqueous solutions of PAE, polyvinyl alcohol (PVA) and urea, then the paper was dried, kept for 10 days and tested.
Results. The influence of the concentration of the PAE solution on the mechanical properties, as well as the surface absorbency, water permeability and air permeability of the paper was studied. The consumption of PAE up to 4–6 % provides the main increase in strength properties of packaging paper both in wet and dry conditions. In a wet state, the destructive force of paper when using a solution of PAE with a concentration of 6 wt. % increases by 4.4–4.8 times.
The use of PAE makes it possible to significantly increase the water resistance of paper. The resistance to water penetration for the studied paper samples increases from 48–73 s to 1800–2170 s. Treatment of paper with a solution of PAE in a composition with urea makes it possible to obtain a material with a higher resistance to water penetration.
The combined use of PAE and PVA makes it possible to control the air permeability of the paper. The use of a solution containing 6–8 wt. % PAE and 4–6 wt. % PVA, helps to ensure the required level of air permeability for a wide range of paper packaging materials for moisture-containing products.
Conclusions. The effectiveness of the use of PAE in combination with urea and PVA for the formation of barrier and protective properties of paper packaging materials has been proposed and proven. It was established that the consumption of PAE up to 4 % provides the main increase in the strength of the packaging paper both in the wet and in the dry state.
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