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Antibacterial degradable fresh-keeping food packaging material and preparation thereof

A food packaging and weight technology, applied in the field of food packaging materials, can solve the problems of chitosan's weak antibacterial performance, inability to prevent food from rotting, and no fresh-keeping effect, etc. It is easy to industrialize large-scale production, has good fresh-keeping effect, and is easy to operate Effect

Inactive Publication Date: 2017-06-23
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent (CN1603361A) discloses a degradable polymer, which is a degradable polymer composed of starch and polylactic acid. It is used in food packaging materials without adding antibacterial agents, has no fresh-keeping effect, cannot sterilize, and cannot prevent food rot
Chinese patent (CN101974213A) discloses a degradable antibacterial food packaging material and its preparation method. In this patent, chitosan is added to a coupling agent auxiliary solution for mixing and stirring, and after drying and removal of the solvent, a degradable polymer material is added to carry out the process. Kneading, adding lubricant and plasticizer, and finally making a film material, but this antibacterial packaging material uses chitosan as an antibacterial agent, and the antibacterial performance of chitosan is not strong, resulting in poor fresh-keeping effect of the material Shortcomings

Method used

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  • Antibacterial degradable fresh-keeping food packaging material and preparation thereof
  • Antibacterial degradable fresh-keeping food packaging material and preparation thereof
  • Antibacterial degradable fresh-keeping food packaging material and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1. with high-speed mixer with 50 gram nano titanium dioxide, 200 gram polycaprolactone (molecular weight is in the scope of 20000), 500 gram polybutylene succinate (molecular weight is in the scope of 10000), 200 gram polyvinyl alcohol ( Molecular weight in the range of 10,000), 200 grams polyhydroxyalkanoate (molecular weight in the range of 15,000), 200 grams of polylactic acid (molecular weight in the range of 20,000), 600 grams of polymethylethylene carbonate (molecular weight in the range of 40,000) 55 grams of acetylated citric acid, 25 grams of tetraisopropyl titanate, and 15 grams of butyl stearate were uniformly mixed to obtain a mixed material, and then the mixed material was added to a single-screw extruder for melt blending (The mixed materials pass through the melting and blending intervals with temperatures of 135°C, 145°C, 150°C, 155°C, 155°C, 160°C, 155°C, and 150°C in turn) and then drawn and pelletized to obtain granular mixed Resin, the gra...

Embodiment 2

[0022] Embodiment 2. with high-speed mixer with 0.5 kilogram of nano-titanium dioxide, 2 kilograms of polycaprolactone (molecular weight is in the scope of 30000), 5 kilograms of polybutylene succinate (molecular weight is in the scope of 20000), 2 kilograms of polyvinyl alcohol ( Molecular weight in the range of 20,000), 2 kg polyhydroxyalkanoate (molecular weight in the range of 20,000), 2 kg polylactic acid (molecular weight in the range of 30,000), 6 kg polymethylethylene carbonate (molecular weight in the range of 50,000) 0.2 kilograms of calcium stearate, 0.3 kilograms of n-octyltriethoxysilane, and 0.3 kilograms of sorbitol are uniformly mixed to obtain mixed materials, and then the mixed materials are added to a single-screw extruder for melt blending ( The mixed materials are sequentially passed through the melting and blending intervals with temperatures of 135°C, 145°C, 150°C, 155°C, 155°C, 160°C, 155°C, and 150°C) and then drawn and pelletized to obtain granular mix...

Embodiment 3

[0023] Embodiment 3. with high-speed mixer with 0.6 kilogram of nano titanium dioxide, 3 kilograms of polycaprolactone (molecular weight is in the scope of 40000), 6 kilograms of polybutylene succinate (molecular weight is in the scope of 30000), 2.5 kilograms of polyvinyl alcohol ( Molecular weight in the range of 30,000), 3 kg of polyhydroxyalkanoate (in the range of molecular weight in the range of 35,000), 3 kg of polylactic acid (in the range of molecular weight in the range of 40,000), 7 kg of polymethylethylene carbonate (in the range of molecular weight in the range of 60,000) , 0.15 kg of stearic acid, 0.4 kg of tetrabutyl titanate, and 0.5 kg of citric acid were uniformly mixed to obtain a mixed material, and then the mixed material was added to a single-screw extruder for melt blending (the mixed material Sequentially pass through the melting and blending intervals with temperatures of 135°C, 145°C, 150°C, 155°C, 155°C, 160°C, 155°C, and 150°C) and then draw strands ...

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PUM

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Abstract

The invention discloses an antibacterial degradable fresh-keeping food packaging material and preparation thereof. The preparation method comprises the steps of adding mixed materials of nanometer titania, polycaprolactone, biodegradable poly butylene succinate, polyvinyl alcohol, polyhydroxyalkanoate, polylactic acid, polymethyl ethylene carbonate and the like to an extruder, carrying out extruding, bracing and pelletizing; and adding prepared aggregates to a film blowing machine to prepare a thin film to obtain the antibacterial degradable food packaging material. The nanometer titania is adopted as an antibacterial raw material, so that the nanometer titania has good antibacterial activity, is capable of killing bacteria, and is free of toxic or side effect and low in dosage; the polycaprolactone, the biodegradable poly butylene succinate, the polyvinyl alcohol, the polyhydroxyalkanoate, the polylactic acid and the polymethyl ethylene carbonate can be completely degraded; the film-forming property is good; the antibacterial degradable fresh-keeping food packaging material has good processability; the thin film material prepared by mixing is taken as an antibacterial fresh-keeping material; and compared with an ordinary packaging material, a lot of cleaning labor can be omitted by the antibacterial packaging material, and the antibacterial timeliness of an antibacterial plastic can be the same as the service life of articles.

Description

technical field [0001] The invention relates to a food packaging material, in particular to a material made of nano-titanium dioxide, polycaprolactone, polybutylene succinate, polyvinyl alcohol, polyhydroxy fatty acid ester, polylactic acid, polymethylethylene carbonate, etc. The obtained food packaging material with strong antibacterial ability and complete biodegradability can be applied to fresh-keeping of fruit and food packaging, etc. Background technique [0002] Worldwide, more than 100 million tons of plastic are produced each year. With the continuous growth of plastic usage, the waste of packaging plastics and various plastic products has formed white pollution. Plastics used for packaging mainly include polypropylene, polyethylene, etc. Because these plastics cannot be degraded and exist in the natural environment for a long time, they cause serious environmental pollution. In order to solve this problem, research on degradable plastics has become a research ho...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08L67/02C08L29/04C08L67/04C08K13/02C08K3/22C08K5/09C08K5/098C08K5/101C08K5/20C08K5/5419C08K5/10C08K5/092B65D65/46
CPCB65D65/466C08K2201/011C08L69/00C08L2201/06C08L2203/16C08L2205/025C08L2205/035C08L67/02C08L29/04C08L67/04C08K13/02C08K2003/2241C08K5/09C08K5/098C08K5/101C08K5/20C08K5/5419C08K5/10C08K5/092Y02A40/90Y02W90/10
Inventor 江贵长江俐孙昊
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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