Fresh-keeping packaging material and products thereof

Abstract

The invention relates to a fresh-keeping packaging material and products thereof, belonging to the technical field of packaging. The invention has the technical scheme that a certain proportion of mineral micropowder of kieselguhr or sepiolite or medical stone or bentonite or tephros or perlite and the like is doped into plastics of PE, PP, PVC and the like and paper pulp, and then the mixture is made into thin films, packaging paper or packaging bags or packaging boxes or packaging cases, trays and the like; the characteristics of dispersity, air permeability, adsorbability, far infrared ray and positive and negative ion function and the like of the mineral micropowder are utilized to enable the packaging material to generate micropores, and therefore, the packaging material has a certain air permeability and adsorbability or generates positive and negative ions or far infrared rays; gas and a small quantity of moisture which are generated from packaged articles are discharged from the micropores, and harmful gas is absorbed and transferred, and thereby, the heat value of the packaged articles can be effectively lowered; microbes are killed or restrained, thereby meeting the demands of keeping fresh of live and fresh food and prolonging storage life.

Description

technical field [0001] The invention relates to a fresh-keeping packaging material and its products, belonging to the technical field of packaging. Background technique [0002] Fresh and live food such as fruits and vegetables are still growing during storage, undergoing various conversion reactions such as saccharification, which will generate heat, become ripe, and become old and discolored. The water content is high, and heat generation is easy to cause rot and deterioration, and it is not resistant to storage, because The damage caused by poor storage is staggering. Therefore, how to extend the storage time of fruits and vegetables and keep their quality unchanged has become a problem that current fruit and vegetable production units, distributors and consumers are generally concerned about and urgently to be solved. [0003] In order to keep the quality of fruits and vegetables unchanged, various methods have been studied: freezing method, ice coating (or coating) met...

AI Technical Summary

Problems solved by technology

Due to the increase of humidity in the bag, during long-term storage, the moisture of fruits and vegetables evaporates and loses, resulting in a lot of condensation water (beads) on the surface of fruits and vegetables and the inner wall of plastic (film) bags, which can cause the quality of fruits and vegetables to deteriorate, lose or reduce the original flavor and taste. , also created conditions for the reproduction of primary parasites, which became the main reason for the decline in the quality of fruits and vegetables