Degradable waterproof oilproof coating on food packaging paper

Abstract

The invention discloses a degradable waterproof oilproof coating on food packaging paper. The coating is composed of modified chitosan, montmorillonite and a fluorine-silicon organic matter, wherein the modified chitosan is carboxymethyl chitosan; the montmorillonite and the fluorine-silicon organic matter are combined to form a hydrophobic surface layer; and a weight ratio of the modified chitosan to the montmorillonite to the fluorine-silicon organic matter is (5-10): (5-10): 1. Because the coating does not contain a laminating film, time and energy are not consumed for treating the laminating film in the recycling process, so benefits are greatly improved; and the food packaging paper formed by coating base paper with the coating has more excellent characteristics in the aspect of an environmental protection function.

Description

technical field [0001] The invention relates to the field of food packaging, in particular to a degradable waterproof and oil-proof coating coated on food packaging paper. Background technique [0002] At present, food packaging is a large player in the packaging industry, accounting for about 70% of the entire packaging industry, and food packaging paper is the top priority in food packaging. Therefore, the safety and environmental protection of food packaging paper has always been a market improvement and The research direction to pursue. [0003] At present, most of the food packaging papers are still coated with a thin layer of plastic on the paper, or coated with wax to form waterproof and oil-proof products. High-end products are also packaged with silicone oil paper, which has a three-layer structure, the first layer is bottom paper, the second layer is laminating film, and the third layer is silicone oil. Generally speaking, the main structure of food packaging pap...

AI Technical Summary

Problems solved by technology

Generally speaking, the main structure of food packaging paper is to spray a layer of plastic film on the bottom paper. The property of the coating film is odorless, non-toxic, wear-resistant and rub-resistant, and can be used in various fields such as infrared rays, ultraviolet rays, lasers, wind, frost, rain, snow, acid and alkali, etc. Long-term use in ecological or physical and chemical environments has become a basic material for international development and utilization. However, due to its stable properties, it is difficult to recycle packaging paper, and it is also difficult to degrade in nature.

[0004] The recycling and reuse of packaging paper is conducive to the development of environmental protection. However, due to the current recycling technology, public awareness, social attention and other factors, compared with developed countries, the recycling rate of food packaging paper in my country is not high, which creates a problem. The problem is that unrecycled food packaging paper remains in nature. The backing paper is generally a degradable material that can be degraded naturally, but the coating film is difficult to degrade naturally. The remaining coating film will still exist and affect the environment.