Compound degradable waterproof paper with film with waterproofness and heat resistance enhanced by polylactic acid

Abstract

The invention discloses compound degradable waterproof paper with a film with waterproofness and heat resistance enhanced by polylactic acid. Polylactic acid is dissolved in chloroform to form a polylactic acid solution, the toughness and temperature resistance of polylactic acid are enhanced by means of plasticization of polycaprolactone, and an impregnated product is subjected to coating, so that the waterproofness and the tensile strength of the paper can be further enhanced, and meanwhile, the heat resistance is greatly improved. The waterproof paper which is extremely good in waterproof property and tensile strength is obtained by way of secondary coating, and meanwhile, as the paper is coated with polylactic acid, the heat resistance of the product is enhanced, so that the product can be used for manufacturing products such as disposable packaging articles and advertising boards, and the waterproof paper is wide in application range, and does not cause burdens to the environment as being biodegradable.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a composite degradable waterproof paper with polylactic acid enhanced film waterproof and heat-resistant performance. 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-...

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