Preparation method of packaging bag capable of being quickly degraded

Abstract

The invention discloses a preparation method of a packaging bag capable of being rapidly degraded, and belongs to the technical field of packaging bags. A raw material formula can be improved based on a light-biological combined degradation mode, meanwhile, degradation-assisting scales are introduced in the film forming process, the degradation-assisting scales can be autonomously combined into a dense state, meanwhile, the outer surface of a thin film is protected, and normal use is not interfered. After being scrapped, the plastic packaging bag enters the natural environment, the degradation-assisting scales can be partially dissolved under the action of water and are changed into net-shaped gaps from the original dense state, the plastic packaging bag can enter the interior of the packaging bag under the action of external light, and the back faces of the degradation-assisting scales convert light energy into heat energy after absorbing the light energy. Meanwhile, oxygen release is accelerated, the thermal oxidation effect is improved, in addition, the external biodegradation effect is matched, the degradation efficiency of the packaging bag can be remarkably improved, and the decomposition period is shortened.

Description

technical field [0001] The invention relates to the technical field of packaging bags, in particular to a method for preparing a rapidly degradable packaging bag. Background technique [0002] Packaging bags refer to bags used to pack various supplies, making the goods convenient to transport and store during the production and distribution process. Widely used in daily life and industrial production. Actual figures show that 80% of used plastic bags are finally transported to landfill areas for disposal like general garbage, and only 7% of plastics are recycled. [0003] Many people know that the main cause of white pollution is the unreasonable use of plastic bags. From a chemical point of view, most of the raw materials of plastic bags we use are general-purpose polyolefin resins such as HDPE, LLDPE and LDPE, which are easy to process and shape. , high strength, low cost and other characteristics, so it is an excellent raw material for the production of plastic bags, bu...

AI Technical Summary

Problems solved by technology

[0003] Many people know that the main cause of white pollution is the unreasonable use of plastic bags. From a chemical point of view, most of the raw materials of plastic bags we use are general-purpose polyolefin resins such as HDPE, LLDPE and LDPE, which are easy to process and shape. , high strength, low cost and other characteristics, so it is an excellent raw material for the production of plastic bags, but it is precisely because of its stable chemical structure and difficult to decompose that it is difficult to decompose plastic bags in the natural environment after being discarded, which results in White pollution that is a headache all over the world

[0004] Now many scientists have begun to research and develop degradable plastic bags that can be automatically decomposed under light and water environments based on the nature of traditional plastic bags that are not easy to decompose in the natural environment. The degradable principle can be divided into photodegradation and biodegradation. The principle of photodegradation is that the product is subjected to the action of sunlight, air and water in the natural environment, through a series of chemical reactions, the original molecular chain is broken, and it is decomposed into ketones, lipids, acids and other substances with very low molecular weight, and finally oxidized into Carbon dioxide and water form part of the biological cycle in nature; biodegradation is the use of various microorganisms in nature to complete the decomposition of molecular chains in the environment of air and water, and finally generate carbon dioxide and water. The principle of the method is the same, nothing more than breaking the molecular chain of the original plastic bag, the difference is that the decomposition medium used is different, the above two methods are good, but the disadvantage is that the decomposition cycle is longer

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