Degradable waterproof paper with water vapor barrier property improved by chitosan bentonite compound

Abstract

The invention discloses degradable waterproof paper with water vapor barrier property improved by a chitosan bentonite compound. The chitosan bentonite compound is prepared by compounding an acetic acid suspension liquid which is obtained by organically modifying bentonite through hexadecyl trimethyl ammonium chloride with a chitosan suspension liquid, so that the penetrating path of oxygen and water vapor in a polymer can be prolonged, and the penetrating resistance is increased; the compound which is added to prepare paper can be uniformly dispersed in pulp, so that the anti-pressure ability, toughness and gas-liquid barrier property of the paper can be improved. The waterproof paper disclosed by the invention is scientific and reasonable in component; by adopting a food grade component, the degradable waterproof paper can be used in food packages, the penetrating rate of water can be reduced, foods can be kept fresh, and moreover, the components are environmental-friendly materials which can be fully degraded, and the product is robust and durable and is excellent in waterproof performance.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a degradable waterproof paper in which a chitosan-bentonite compound improves water vapor barrier properties. Background technique [0002] Paper fibers are highly hydrophilic. Generally, after untreated paper is soaked in water, most of the fiber strength will be lost, or even broken directly. In order to meet the needs of people's life and the development of modern industrial technology, the application field of paper is increasing. Waterproof paper is widely used in product packaging, food packaging and other fields. With the increasing awareness of environmental protection, people's demand for environmentally friendly and degradable waterproof paper is becoming stronger and stronger. [0003] In the article "Synthesis of high-efficiency and low-cost wet strength agent and its application in waterproof base paper", the synthesis process of high-efficiency and low-cost pol...

AI Technical Summary

Problems solved by technology

In the article, the waterproof base paper is mainly prepared from cellulose. Even if specific additives such as wet strength agent and sizing agent are added, its biodegradability is still outstanding. Under certain conditions, after a certain period of time, the waterproof paper It can still be completely degraded, but its waterproof effect has certain limitations. At present, there are PP waterproof papers on the market. A special process is used to make PP coated on the surface of the paper, so that the paper has good waterproof performance. Since PP is a petrochemical product, It has high stability and is difficult to biodegrade, causing harm to the environment