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Degradable anti-microbial food packaging material and preparation method thereof

A food packaging and antibacterial film technology, applied in the field of degradable antibacterial food packaging materials and their preparation, can solve problems such as poor packaging, and achieve good physical and chemical properties, growth inhibition, surface finish and transparency.

Active Publication Date: 2017-07-28
ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the relatively rare functional packaging materials in the prior art and the demand for environmental protection, the purpose of the present invention is to provide a degradable antibacterial food packaging material to solve the problems caused by poor packaging, in order to effectively inhibit the growth of food spoilage bacteria, Extend the storage period of food, and solve the "white pollution" to reduce the damage to the environment; the invention also provides the preparation method of the material, which is simple and easy to operate, so as to realize industrialization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A degradable antibacterial food packaging bag, which is composed of 1 weight part of 8052D type polylactic acid, 0.07 weight part of thymol and 0.05 weight part of tributyl citrate.

[0029] The preparation method of described degradable antibacterial food packaging bag, comprises the following steps:

[0030] (1) vacuum-dry the polylactic acid particles at 70°C to constant weight;

[0031] (2) Weighing 1 part by weight of the material obtained in step (1), using a solution blending method to dissolve the polylactic acid particles in 20 parts by weight of methylene chloride;

[0032] (3) add the thymol of 0.07 parts by weight and the tributyl citrate of 0.05 parts by weight in the solution that step (2) obtains, after thymol and tributyl citrate dissolve, pass through at room temperature Stir with a magnetic stirrer to disperse evenly;

[0033] (4) Pour the uniformly dispersed solution obtained in step (3) into a glass mold, let it dry naturally for 24 hours, then tra...

Embodiment 2

[0038] A degradable antibacterial food packaging bag, which is composed of 1 weight part of 8052D type polylactic acid, 0.05 weight part of thymol and 0.07 weight part of tributyl citrate. The preparation method refers to Example 1.

[0039] In this example, the thickness of the biodegradable antibacterial food packaging bag material is tested according to GB / T6672-2001, and the tensile properties are tested according to GB / T1040.3-2006. The results are: the thickness of the food packaging bag is 0.049mm, the tensile strength is 40.61MPa, and the elongation at break is 74.43%.

[0040] After testing, the same technical effect as that of Embodiment 1 can be achieved, and will not be repeated here.

Embodiment 3

[0042] A degradable antibacterial food packaging bag, which is composed of 1 weight part of 8052D polylactic acid, 0.1 weight part of thymol and 0.03 weight part of tributyl citrate. The preparation method refers to Example 1.

[0043] In this example, the thickness of the biodegradable antibacterial food packaging bag material is tested according to GB / T6672-2001, and the tensile properties are tested according to GB / T1040.3-2006. The results are: the thickness of the food packaging bag is 0.040mm, the tensile strength is 15.24MPa, and the elongation at break is 258.81%.

[0044] After testing, the same technical effect as that of Embodiment 1 can be achieved, and will not be repeated here.

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Abstract

The invention relates to the field of a food packaging material, and particularly relates to a degradable anti-microbial food packaging material. The degradable anti-microbial food packaging material is prepared by base material polylactic acid and assistant thymol crystals and tributyl citrate by applying a tape casting technique, wherein the dosage of polylactic acid is 5-10% of polylactic acid by weight, dosage of tributyl citrate acid is 3-7% of polylactic acid by weight. Specific to the rare functional packaging material and environmental protection demand in the prior art, the invention provides the degradable anti-microbial food packaging material, and the material can effectively inhibit the growth of food putrefying bacteria, prolong the food storage term, solve 'white pollution', and reduce the environment pollution.

Description

technical field [0001] The invention relates to the field of food packaging materials, in particular to a degradable antibacterial food packaging material and a preparation method thereof. Background technique [0002] Microbial spoilage is an important reason affecting food deterioration. According to statistics, in the fruit and vegetable industry, the annual loss of fruit and vegetable decay in my country is 75 billion yuan, accounting for more than 30% of the output value of the entire industry. Compared with the international market, there is still a big difference. One of the big reasons is that the packaging is not good, which affects exports, and because the packaging function does not meet the requirements, it is not conducive to circulation and consumption, resulting in serious losses. At present, the packaging materials on the market are relatively rare with functions. The ordinary polyethylene cling film we often see in supermarkets can only moisturize and isolat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08K5/13C08K5/11C08J5/18
CPCC08J5/18C08J2367/04C08K5/11C08K5/13C08L2201/06C08L2203/16C08L67/04
Inventor 郜海燕穆宏磊陈杭君
Owner ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES