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Degradable food packaging material and method for preparing same

A technology for degradable materials and food packaging, applied in the field of degradable materials for food packaging and its preparation, can solve the problems of poor toughness and easy mildew of starch-based plastics, and achieve the effect of excellent performance indicators

Inactive Publication Date: 2017-03-15
ZHENGZHOU LIFUAI BIOLOGICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, starch-based plastics have poor toughness and are prone to mildew under natural conditions.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A degradable material for food packaging, the main raw materials in parts by weight are: 20 parts of carrageenan, 30 parts of polylactic acid, 8 parts of cornstarch, 5 parts of acanthopanax, 2 parts of moss, 1 part of plantain, 0.5 parts of sodium stearate, 2 parts of D-isoleucine, 4 parts of ethyl acetate, and 0.5 parts of chlorogenic acid.

[0017] A method for preparing a degradable material for food packaging, the specific steps are:

[0018] First, mix carrageenan, polylactic acid, corn starch, sodium stearate, D-isoleucine, ethyl acetate, and chlorogenic acid evenly, at a stirring speed of 300 r / min, for 1 h, and at a temperature of 45 ℃, followed by supercritical carbon dioxide extraction of Radix Wujiapi, Moss aspergillus, and Plantain, and the extracted mixture and the stirred mixture were added to a twin-screw extruder for granulation to obtain a degradable product for food packaging. Material.

Embodiment 2

[0020] A degradable material for food packaging, the main raw materials in parts by weight are: 23 parts of carrageenan, 32 parts of polylactic acid, 10 parts of cornstarch, 6 parts of acanthopanax bark, 2 parts of moss aspergillus, 1 part of plantain, 0.5 parts of sodium stearate, 2 parts of D-isoleucine, 4 parts of ethyl acetate, and 0.5 parts of chlorogenic acid.

[0021] A method for preparing a degradable material for food packaging, the specific steps are:

[0022] First, mix carrageenan, polylactic acid, corn starch, sodium stearate, D-isoleucine, ethyl acetate, and chlorogenic acid evenly, at a stirring speed of 300 r / min, for 1 h, and at a temperature of 45 ℃, followed by supercritical carbon dioxide extraction of Radix Wujiapi, Moss aspergillus, and Plantain, and the extracted mixture and the stirred mixture were added to a twin-screw extruder for granulation to obtain a degradable product for food packaging. Material.

Embodiment 3

[0024] A degradable material for food packaging, the main raw materials in parts by weight are: 25 parts of carrageenan, 35 parts of polylactic acid, 12 parts of cornstarch, 7 parts of acanthopanax, 3 parts of moss, 3 parts of plantain, 0.7 parts of sodium stearate, 4 parts of D-isoleucine, 6 parts of ethyl acetate, and 0.7 parts of chlorogenic acid.

[0025] A method for preparing a degradable material for food packaging, the specific steps are:

[0026] First, mix carrageenan, polylactic acid, corn starch, sodium stearate, D-isoleucine, ethyl acetate, and chlorogenic acid evenly, with a stirring speed of 450r / min, a stirring time of 1.5h, and a stirring temperature of At 47°C, supercritical carbon dioxide extraction is then performed on the bark of Acanthopanax, Quercus, and Plantain, and the extracted mixture and the stirred mixture are added to a twin-screw extruder for granulation to obtain edible packaging. degradable material.

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Abstract

The invention discloses a degradable food packaging material and a method for preparing the same. The degradable food packaging material is mainly made of, by weight, 20-30 parts of carrageenan, 30-40 parts of polylactic acid, 8-15 parts of corn starch, 5-8 parts of cortex acanthopanacis, 2-4 parts of dicranum scoparium, 1-5 parts of herba plantaginis, 0.5-0.8 part of sodium stearate, 2-6 parts of D-isoleucine, 4-8 parts of ethyl acetate and 0.5-0.9 part of chlorogenic acid. The degradable food packaging material and the method have the advantages that biological decomposition procedures of the degradable food packaging material are simulated in natural water-containing environments according to GB / T 19276.1-2003 standards, the maximum tested biological decomposition rate of the degradable food packaging material can reach 98%, the maximum tested light degradation rate of the degradable food packaging material can reach 95%, and the degradable food packaging material is excellent in other performance indexes.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to a degradable material for food packaging and a preparation method thereof. Background technique [0002] For a long time, the plastic products we use, such as agricultural film materials, are disposable products made of petroleum synthetic resins, such as polyvinyl chloride, polypropylene, polyethylene, etc., and are discarded as garbage after use. Some are discarded everywhere, and some are buried or burned, which greatly wastes resources. These plastic products take about 200 years to be decomposed. Harmful substances produced during its processing directly pollute the air and water sources. These discarded water-retaining films also caused great damage to the soil structure of the land, directly leading to a series of adverse consequences such as land production reduction. [0003] The degradable plastics currently developed and researched are mainly divided into biodegra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L5/00C08L3/02C08K5/00C08K5/098C08K5/101B65D65/46
CPCB65D65/466C08L67/04C08L2201/06C08L2205/03C08L5/00C08L3/02C08K5/00C08K5/098C08K5/101Y02A40/90Y02P20/54Y02W90/10
Inventor 不公告发明人
Owner ZHENGZHOU LIFUAI BIOLOGICAL TECH CO LTD
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