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Novel environmental protection fresh-keeping paper or cardboard and preparation method thereof

A cardboard and antistaling agent technology, which is applied in the fields of fruit and vegetable preservation, papermaking, paper coating, etc., can solve the problems of bad smell of sulfur dioxide in fresh-keeping gas, difficulty in controlling the release rate of sulfur dioxide, etc., and achieve long-term sterilization effect, wide action temperature range, and strong sterilization Effect

Inactive Publication Date: 2011-12-21
ZHEJIANG YONGTAI PAPER IND GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pyrosulfite itself is not an environmentally friendly chemical, and the fresh-keeping gas sulfur dioxide released has a bad smell
In addition, the release of sulfur dioxide gas will change due to environmental changes or changes in pH, so it is difficult to control the release rate of sulfur dioxide

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Take a certain amount of starch, gelatinize it at a concentration of 5%, dilute to a concentration of 2%, and prepare a preservative according to the dosage of glucose as 60umol / L and the dosage of glucose oxidase as 60umol / L for 5 minutes. PH value is 6, applied to the cardboard, scraped with a glass rod washed with distilled water, placed in a clean tray, and dried for later use. At a temperature of 30°C, the measured antibacterial rate is about 70%.

Embodiment 2

[0019] Take a certain amount of starch, gelatinize it under the condition of 5% concentration, dilute it to a concentration of 5%, according to the dosage of glucose is 140umol / L, the dosage of glucose oxidase is 90umol / L, react for 5 minutes, and prepare the preservative, adjust PH value is 6, applied to the cardboard, scraped with a glass rod washed with distilled water, placed in a clean tray, and dried for later use. At a temperature of 30°C, the measured antibacterial rate is about 80%.

Embodiment 3

[0021] Take a certain amount of starch, gelatinize it under the condition of 5% concentration, dilute to the concentration of 2%, according to the dosage of glucose is 280umol / L, the dosage of glucose oxidase is 120umol / L, react for 5 minutes, prepare the preservative, adjust PH value is 6, applied to the cardboard, scraped with a glass rod washed with distilled water, placed in a clean tray, and dried for later use. At a temperature of 30°C, the measured antibacterial rate is about greater than 85%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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PUM

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Abstract

The invention relates to a paperboard for preserving fruits and a preparation method thereof. The novel environmental-friendly preservative paper (or paperboard) provided by the invention takes plant fiber paper as a substrate and an environmental-friendly preservative is attached on the substrate; the effective components of the environmental-friendly preservative are glucose and glucose oxidaseand a carrier medium is polyvinyl alcohol, starch or starch derivatives. The preservative paper and paperboard provided by the invention have slow-releasing performance and durability when the preservative releases the effective component hydrogen peroxide, so that the preservative paperboard has efficient and long sterilization effects. Meanwhile, the preservative paper and paperboard provided by the invention are suitable for a high temperature in a range of 30-60 DEG C and the preservative paper and paperboard can realize the fresh-keeping effect without refrigerating at a low temperature.

Description

technical field [0001] The invention relates to a cardboard for keeping fruits fresh and a preparation method thereof. Background technique [0002] At present, pyrosulfite is usually used as a preservative for fruit fresh-keeping paper. When pyrosulfite or sulfite encounters water or steam, it will release sulfur dioxide gas, which plays a role in sterilization and preservation. Pyrosulfite itself is not an environmentally friendly chemical, and the fresh-keeping gas sulfur dioxide released has a bad smell. In addition, the release of sulfur dioxide gas will change due to environmental changes or changes in pH, so it is difficult to control the release rate of sulfur dioxide. Contents of the invention [0003] The object of the present invention is to provide a novel environment-friendly fresh-keeping paper or cardboard and a preparation method thereof. [0004] For reaching above-mentioned purpose, the technical scheme that the present invention takes is as follows: ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): A23B7/148D21H19/00
Inventor 杨仁党高文花陈献忠王建华陈华
Owner ZHEJIANG YONGTAI PAPER IND GROUP
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