Food-grade environment-friendly natural-degradable plastic bag

Abstract

The invention provides a food-grade environment-friendly natural-degradable plastic bag. The plastic bag is prepared from the following components in parts by weight: 20-60 parts of high-density polyethylene, 15-25 parts of polylactic acid, 5-8 parts of poly-beta-hydroxybutyrate, 4-10 parts of crosslinker, 20-30 parts of waste plant fibers, 10-20 parts of modified starch, 10-20 parts of grapeseedextract-lecithin / chitosan nano-particles, 10-20 parts of molybdenum dioxide nano-particles, 10-20 parts of priobiotic-embedded nano-particles, 7-10 parts of adamantane, 5-10 parts of ammonium polyphosphate, 5-10 parts of N-hydroxysuccinimide and 2-5 parts of beta-cyclodextrin. The food-grade environment-friendly natural-degradable plastic bag prepared by the preparation method has the technical effects of bacterium resistance, bacterium inhibition, oxidation resistance, high tensile strength, high wearing strength, high temperature resistance, deformation prevention, organic toxic substance leakage prevention and natural and quick degradation, and can be used for improving the soil fertility and nutritional degree after degradation.

Description

technical field [0001] The invention belongs to the field of plastics, in particular to a food-grade, environment-friendly and naturally degradable plastic bag. Background technique [0002] The fast-paced lifestyle and the rapid development of the Internet make more and more working-class people choose to order online for lunch. Online food delivery is directly packed in hard plastic lunch boxes or plastic bags. Big, the store does not have enough time to clean the bowls and chooses to put a layer of plastic bags on the bowls to hold the hot food that has just been cooked. Since the plastic bags have heat resistance within a certain range, they will be in the oven when the temperature exceeds this temperature. Melting or releasing toxic chemical raw materials such as plasticizers in the process of making plastic bags under the heat source will enter our food. This harmful substance will lead to precocious puberty, cardiovascular disease, and also It may lead to decreased i...

AI Technical Summary

Problems solved by technology

[0002] The fast-paced lifestyle and the rapid development of the Internet make more and more working-class people choose to order online for lunch. Online food delivery is directly packed in hard plastic lunch boxes or plastic bags. Big, the store does not have enough time to clean the bowls and chooses to put a layer of plastic bags on the bowls to hold the hot food that has just been cooked. Since the plastic bags have heat resistance within a certain range, they will be in the oven when the temperature exceeds this temperature. Melting or releasing toxic chemical raw materials such as plasticizers in the process of making plastic bags under the heat source will enter our food. This harmful substance will lead to precocious puberty, cardiovascular disease, and also It may lead to decreased immunity, liver disease and urinary system diseases, which endanger human life and health

[0003] The ingredients in the plastic bag also contain a kind of phthalate, which will increase the risk of diabetes. If it is eaten by the human body with normal blood sugar, it will also depend on the secretion of insulin. Using this kind of plastic bag is helpful May increase the chance of diabetes, especially affecting the health of the elderly

If plastic bags hold vegetables for a long time, it may also breed bacteria, and it may also cause vegetables to deteriorate

Because the vegetables in plastic bags are not ventilated, this will lead to a higher temperature inside the bag, and bacteria will easily breed for a long time, which will cause the vegetables to deteriorate. When people eat vegetables that have deteriorated, it will also cause great harm to the body. big hazard

[0004] Chinese patent 201811236416.8 discloses an antibacterial plastic bag material for food and its preparation method. In its technical solution, antibacterial and antioxidant properties of plastic bags are realized by adding antibacterial agents and antioxidants. The antibacterial agents used are modified accumulators. The antibacterial principle of modified rectorite and nano-zinc oxide is that it has high adsorption. After absorbing the external bacteria into the plastic bag, the modified rectorite and chitosan synergistically sterilize and disinfect. If the external bacteria are too If there are too many bacteria, many bacteria will be absorbed on the surface of the plastic bag, and when the bactericidal ability of the modified rectorite and chitosan is not enough to kill all the absorbed bacteria, it will cause a negative reaction. Aggravate the pathogenic bacteria contained in plastic bags, damage food quality, and endanger human health; the antioxidants used are antioxidant 1076 and ultraviolet absorber UV-531. These two antioxidants are high in cost and will cause The degradation time of plastic bags is long, so while increasing the buying and selling price of plastic bags, it will also cause pressure on environmental protection; and the plastic bags for food prepared by this kind of preparation ingredients have not shown that they have good thermal deformation resistance and resistance High-temperature melting ability, so it cannot be shown that the food plastic bags made of this ingredient will not leach toxic and harmful chemicals at high temperatures

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