Biodegradable preservative film material and preservative film

Abstract

The invention discloses a biodegradable preservative film material which contains polyhydroxyalkanoate. The invention also discloses a preservative film prepared by the material, wherein the preservative film has a proper penetration rate and a good oxygen blocking function, so that some fruits and vegetables can retain proper moisture but not be contact with oxygen to prolong the preservative time; and in addition, the biodegradable preservative film material has a good preservative effect, and can be completely biodegraded after the preservative film is discarded after use, and pollution to the environment is not caused.

Description

technical field [0001] The invention relates to a fresh-keeping film material and a fresh-keeping film, in particular to a biodegradable fresh-keeping film material and a fresh-keeping film. Background technique [0002] Vegetables and fruits that people often eat in daily life are easy to deteriorate and cause waste. These fresh vegetables and fruits will either wilt and turn black after being left for a long time or they will be easily spoiled because of too much water. Bad. The commonly used storage method is to use plastic wrap to preserve fresh vegetables and fruits. Currently, the plastic wraps used in the market are PE and PP plastic wraps. Due to the low water vapor transmission rate of this kind of plastic wrap, they can well preserve the freshness of vegetables and fruits. water, but at the same time it will also cause a lot of water to deposit at the bottom of the container where the vegetables and fruits are placed, which will shorten the shelf life of some vege...

AI Technical Summary

Problems solved by technology

[0002] Vegetables and fruits that people often eat in daily life are easy to deteriorate and cause waste. These fresh vegetables and fruits will either wilt and turn black after being left for a long time or they will be easily spoiled because of too much water. Bad

The commonly used storage method is to use plastic wrap to preserve fresh vegetables and fruits. Currently, the plastic wraps used in the market are PE and PP plastic wraps. Due to the low water vapor transmission rate of this kind of plastic wrap, they can well preserve the freshness of vegetables and fruits. water, but at the same time it will also cause a lot of water to deposit at the bottom of the container where the vegetables and fruits are placed, which will shorten the shelf life of some vegetables and fruits. Moreover, this type of plastic wrap is disposable and is usually discarded as garbage after use. It is difficult to recycle and cannot be degraded, causing serious pollution to the environment

[0003] In view of this, the current development direction of plastic wrap technology is to develop a plastic wrap with superior performance and complete biodegradability. In recent years, due to the rapid development of biodegradable polymer materials, relevant researchers have begun to start from this aspect. At present, many Both companies and R&D institutions have done a lot of research and development work in this area, but at present, no major progress has been made in fully biodegradable plastic wrap.