Water-resistant preservative composite paper and preparation method thereof

Abstract

The invention discloses water-resistant preservative composite paper and a preparation method thereof. The water-resistant preservative composite paper comprises a base paper layer, and a surface gluelayer; the quantification of the base paper layer is 23-25g / sq.m., and the quantification of the surface glue layer is 2-3g / sq.m.. The water-resistant preservative composite paper has high air permeability, strong corrosion resistance, high deflection and water resistance; the composite paper has high strength under a wetting state, and has good preservation effect at the same time.

Description

Technical field [0001] The invention relates to the technical field of papermaking, in particular to a water-resistant and fresh-keeping composite paper and a preparation method thereof. Background technique [0002] With the improvement of the quality of life, people have a higher consumption demand for seasonal and fresh fruits and vegetables. my country's fruit planting area and fruit output have always been ranked first in the world, but fruit and vegetable products have high moisture content and are easy to rot. At this stage, my country's fresh fruits and vegetables are improperly harvested, post-harvest commercialization processing technology is backward, storage and transportation conditions are inappropriate, and storage and processing capacity Insufficiency and other reasons, the loss rate of rot caused by fruits reached 30%, vegetables reached 30-40%, while the loss rate of developed countries was less than 7%. Therefore, it is very important to adopt effective preserv...

AI Technical Summary

Problems solved by technology

Existing fresh-keeping materials include PE film and fresh-keeping paper coated with preservatives. PE film is used directly for fresh-keeping, which has poor air permeability and has a certain fresh-keeping effect in low-temperature environments. However, when the ambient temperature rises, the fruits and vegetables wrapped in the PE film will It will also speed up the respiration and release a large amount of ethylene and oxygen. These gases will accelerate the decay of fruits and vegetables, thus losing the freshness preservation effect. Therefore, someone has developed a plastic wrap instead of a PE plastic wrap to overcome the problem of poor air permeability of the existing PE, but the existing The water resistance of fresh-keeping paper is not good. When the humidity of the environment is relatively high, the fresh-keeping paper will absorb water and damage it, losing its fresh-keeping effect.

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