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Novel biological preservative film and preparation method thereof

A new type of biological fresh-keeping technology, applied in the field of new biological fresh-keeping film and its preparation, achieves the effects of convenient use, low comprehensive use cost and less material consumption

Pending Publication Date: 2021-02-26
谭雯文
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of novel biological preservative film and preparation method thereof, to solve the problem proposed in the above-mentioned background technology

Method used

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  • Novel biological preservative film and preparation method thereof
  • Novel biological preservative film and preparation method thereof
  • Novel biological preservative film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A new type of biological preservative film, made of the following components by weight: 65 parts of polylactic acid, 60 parts of biodegradable aliphatic-aromatic copolyester, 3 parts of toughening agent, 5 parts of chitosan, absorption 1 part of agent, 1 part of antibacterial oil, 0.5 part of antioxidant, 0.5 part of lubricant, dry polylactic acid and biodegradable aliphatic-aromatic copolyester in an oven at 75-80 ° C for 4-5 hours, and make each component Moisture content ≤ 0.08%, and then polylactic acid, biodegradable aliphatic-aromatic copolyester, toughener, chitosan, absorbent, antibacterial oil, antioxidant, lubricant of each component are added to the high-mixing In the machine, mix at a high speed at room temperature for 5-10 minutes; feed the blend in the high-speed mixer into the screw extruder through the feeding port, and then blow it into a film and cool it down to obtain the fresh-keeping film.

Embodiment 2

[0026] A new type of biological preservative film, made of the following components by weight: 80 parts of polylactic acid, 60 parts of biodegradable aliphatic-aromatic copolyester, 4 parts of toughening agent, 2 parts of chitosan, absorption 1 part of agent, 4 parts of antibacterial oil, 0.3 part of antioxidant, 0.4 part of lubricant. Dry the polylactic acid and biodegradable aliphatic-aromatic copolyester in an oven at 75-80°C for 4-5h to make the moisture content of each component ≤0.08%, and then dry the polylactic acid and biodegradable aliphatic copolyester of each component - Aromatic copolyester, toughening agent, chitosan, absorbent, antibacterial oil, antioxidant, and lubricant are added to the high-speed mixer, and mixed at high speed for 5-10 minutes at room temperature; the blend in the high-mixer It is fed into a screw extruder through a feeding port, blown into a film and then cooled to obtain the fresh-keeping film.

Embodiment 3

[0028] A new type of biological preservative film, made of the following components by weight: 50 parts of polylactic acid, 70 parts of biodegradable aliphatic-aromatic copolyester, 3 parts of toughening agent, 3 parts of chitosan, absorption 2 parts of agent, 3 parts of antibacterial oil, 0.4 part of antioxidant, 0.3 part of lubricant. Dry the polylactic acid and biodegradable aliphatic-aromatic copolyester in an oven at 75-80°C for 4-5h to make the moisture content of each component ≤0.08%, and then dry the polylactic acid and biodegradable aliphatic copolyester of each component - Aromatic copolyester, toughening agent, chitosan, absorbent, antibacterial oil, antioxidant, and lubricant are added to the high-speed mixer, and mixed at high speed for 5-10 minutes at room temperature; the blend in the high-mixer It is fed into a screw extruder through a feeding port, blown into a film and then cooled to obtain the fresh-keeping film.

[0029] experiment one:

[0030] The fres...

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PUM

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Abstract

The invention relates to the technical field of preservative films, in particular to a novel biological preservative film and a preparation method thereof. The film is prepared from the following components in parts by weight: 10-90 parts of polylactic acid, 10-90 parts of biodegradable aliphatic-aromatic copolyester, 2-5 parts of a toughening agent, 1-3 parts of chitosan, 1-3 parts of an absorbent, 1-5 parts of antibacterial oil, 0.3-0.6 part of an antioxidant and 0.2-0.6 part of a lubricant. The biological preservative film disclosed by the invention can be applied to fresh keeping of various foods such as cooked foods, fruits and vegetables, meat and the like, has a strong bactericidal effect, can kill more than 650 bacteria within multiple minutes, has extremely strong antibacterial, antiseptic and fresh-keeping functions, also has a spontaneous modified atmosphere function, is convenient to use, does not need to use a fresh-keeping agent, and greatly prolongs the storage and fresh-keeping period of the food. Specifically, a common fresh-keeping film can only keep the food fresh for 2-3 days, but the preservative film can keep the food fresh for 15-30 days, which is 5-10 timesthat of the common fresh-keeping film.

Description

technical field [0001] The invention relates to the technical field of preservative film, in particular to a novel biological preservative film and a preparation method thereof. Background technique [0002] Preservative films are ubiquitous in life, and many families cannot do without them. At present, most of the preservative films sold on the market are the same as the commonly used plastic bags, and they are all made of vinyl masterbatch as raw materials. According to the different types of vinyl masterbatch, plastic wrap is divided into three categories: polyethylene, polyvinyl chloride and polyvinylidene chloride. These plastic wraps are relatively harmful to the human body. At the same time, since plastics are not easy to decompose and rot in nature, they will produce toxic gases when burned, which will bring serious harm to the ecological environment. [0003] In recent years, unsafe accidents caused by food packaging have pushed the problem of food packaging to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02C08L5/08C08L91/00C08L67/00C08K5/134C08K5/526C08K5/098C08K5/20C08J5/18
CPCC08J5/18C08J2367/04C08J2405/08C08J2467/02C08J2491/00C08K5/098C08K5/1345C08K5/20C08K5/526
Inventor 谭雯文
Owner 谭雯文
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