Degradable preservative film

Abstract

The invention relates to the field of preservative films, in particular to a degradable preservative film. The degradable preservative film is prepared from the following substances in parts by weight: 30-40 parts of polyhydroxyalkanoate, 25-45 parts of soyabean protein, 5-8 parts of biologic antibacterial components, 0.5-0.8 part of an antioxidant, 40-50 parts of PHA resin, 8-12 parts of acetyl triethyl citrate, 8-12 parts of nano calcium carbonate, 10-15 parts of modified attapulgite clay, 0.8-2.5 parts of n-butyl stearate, 1.5-4 parts of a titanate coupling agent, 5-9 parts of chitosan, 5-8 parts of PBS, 3-5 parts of PBAT, 25-35 parts of starch, 10-15 parts of glass cellulose, 5-10 parts of a compatilizer, 0.5-2.8 parts of a plasticizer and 3-5 parts of a processing aid. The degradable preservative film provided by the invention is good in bacteriostasis and freshness retaining, is good in transmittance of gas and vapor, can improve a freshness-retaining effect of food, prolongs freshness-retaining time, keeps gas in the preservative film balanced; and after the degradable preservative film is used, most of the degradable preservative film is a degradable material and can be biologically degraded, and therefore, the degradable preservative film is significant for environmental protection.

Description

technical field [0001] The invention relates to the field of plastic wrap, in particular to a degradable plastic wrap. Background technique [0002] Plastic wrap is a kind of plastic packaging product commonly used by people to keep fresh food. Now many families cannot do without them, such as heating food in microwave ovens, storing food in refrigerators, etc. all need plastic wrap. The most commonly used 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 type of plastic wrap, they can keep the moisture of vegetables and fruits very well. 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 u...

AI Technical Summary

Problems solved by technology

The most commonly used 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 type of plastic wrap, they can keep the moisture of vegetables and fruits very well. 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. Due to the difficulty of recycling , and cannot be degraded, causing serious pollution to the environment