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Hydrophobic oil-resistant food packaging paper and preparation method thereof

A food packaging paper and food packaging technology, applied in the field of papermaking, can solve the problems of reduced physical strength, food hazards, environmental sanitation and environmental safety, etc., and achieve the effects of improving the bonding force between fibers, improving physical properties, and large specific surface area

Active Publication Date: 2020-02-14
浙江恒川新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, whether the surface of food packaging paper is waxed or coated is safe, which is also a concern of the government, the public and technical personnel in related fields. There will be certain safety hazards for the surface of food packaging paper coated with wax or coated; for example, waxed paper is used for packaging Hot water will melt the paraffin on the inner wall of the paper cup, which may endanger your health
In addition, this kind of wax and polymer film will cause trouble in the recycling process of waste paper, and the waste paper pulp is difficult to clean, thus affecting environmental sanitation and environmental safety.
[0004] Generally, when the ambient humidity of food packaging paper is high, water vapor can easily penetrate into the pores of the paper, and the paper has high water absorption, which will significantly reduce the physical strength of the paper, make the paper easy to break, and endanger its packaging. In addition, the ability of food packaging paper to block oxygen and water vapor is also weakened, so that the packaged food is easy to deteriorate, and it is difficult to meet the high requirements of food packaging.

Method used

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  • Hydrophobic oil-resistant food packaging paper and preparation method thereof
  • Hydrophobic oil-resistant food packaging paper and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] A kind of preparation method of hydrophobic and oil-resistant food wrapping paper of the present embodiment, described method specifically comprises the following steps:

[0038] (1) First, add water to the purchased nanocellulose (made by TEMPO oxidation-mechanical treatment of softwood pulp fibers) to prepare a 1.5% nanocellulose suspension, and put 1.5% nanocellulose in the reactor The aqueous suspension was evaporated so that the suspension became gel-like. Add dispersant N-N-dimethylformamide and gelatinous nanocellulose into another reactor according to the ratio, mix well, then keep stirring at constant temperature in the reactor for 6 hours at 85°C, then add trifluoroacetic acid anhydride and 4-dimethylaminopyridine (the mass ratio of nanocellulose, trifluoroacetic anhydride, and 4-dimethylaminopyridine is 1:50:2.0), then disperse for 20 minutes, and raise the temperature to 100°C. After 6 hours of reaction Cool for 30 minutes, and then wash with ethanol, aceto...

Embodiment 2

[0048] A kind of preparation method of hydrophobic and oil-resistant food wrapping paper of the present embodiment, described method specifically comprises the following steps:

[0049] (1) First, add water to the purchased nanocellulose (made by TEMPO oxidation-mechanical treatment of softwood pulp fibers) to prepare a 1% nanocellulose suspension, and put 1% nanocellulose in the reactor The aqueous suspension was evaporated so that the suspension became gel-like. Add dispersant N-N-dimethylformamide and gelatinous nanocellulose into another reactor according to the ratio, mix well, then keep stirring in the reactor at constant temperature for 3 hours at 90°C, and then add trifluoroacetic acid anhydride and 4-dimethylaminopyridine (the mass ratio of nanocellulose, trifluoroacetic anhydride, and 4-dimethylaminopyridine is 1:50:1.0), then disperse for 15 minutes, and raise the temperature to 100°C, and react for 5 hours Cool for 30 minutes, and then wash with ethanol, acetone a...

Embodiment 3

[0059] A kind of preparation method of hydrophobic and oil-resistant food wrapping paper of the present embodiment, described method specifically comprises the following steps:

[0060] (1) First, add water to the purchased nanocellulose (made by TEMPO oxidation-mechanical treatment of softwood pulp fibers) to prepare a 1.2% nanocellulose suspension, and 1.2% nanocellulose in the reactor The aqueous suspension was evaporated so that the suspension became gel-like. Add dispersant N-N-dimethylformamide and gelatinous nanocellulose into another reactor according to the ratio, mix well, then keep stirring in the reactor at constant temperature for 4 hours at 90°C, and then add trifluoroacetic acid anhydride and 4-dimethylaminopyridine (the mass ratio of nanocellulose, trifluoroacetic anhydride, and 4-dimethylaminopyridine is 1:50:0.5), then disperse for 10 minutes, and raise the temperature to 100°C, and react for 3 hours Cool for 30 minutes, and then wash with ethanol, acetone a...

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Abstract

The invention discloses hydrophobic oil-resistant food packaging paper and a preparation method thereof, and belongs to the technical field of papermaking. The hydrophobic oil-resistant food packagingpaper is composed of food packaging base paper and a hydrophobic oil-resistant coating layer formed on the surface of the food packaging base paper; wherein the hydrophobic oil-resistant coating layer is formed by a surface sizing agent composed of chitosan, polylactic acid and fluorine-containing hydrophobic oil-resistant modified nanocellulose, the oil-proof grade of the food packaging paper islarger than or equal to 7, the oxygen permeability is 8.5-11 cm < 3 > / (m<2>*24 h), and the water vapor permeability is 137-142 g / (m<2> *24 h). The food packaging paper prepared by the invention can effectively block the permeation of water vapor and oxygen and prolong the shelf life of food, and the added chitosan and polylactic acid can also improve the physical properties and antibacterial properties of the paper. In addition, the adopted nano cellulose has the advantages of being biodegradable, wide in source, safe, environmentally friendly and the like.

Description

technical field [0001] The invention belongs to the technical field of papermaking, and in particular relates to a hydrophobic and oil-resistant food wrapping paper and a preparation method thereof. Background technique [0002] With the improvement of people's awareness of environmental protection and the promulgation of the national ban on plastics, many areas no longer use plastics as packaging materials, and replace them with recyclable, degradable, and non-white pollution paper. However, food packaging paper has disadvantages such as poor oxygen resistance and water vapor performance in the case of high ambient humidity, which will affect its use effect and the safety of its packaged food. [0003] General food packaging paper is usually coated with wax or film on the surface of the paper to improve the water and oil resistance of the paper. However, whether the surface of food packaging paper is waxed or coated is safe, which is also a concern of the government, the p...

Claims

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Application Information

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IPC IPC(8): D21H27/10D21H21/16D21F11/02D21B1/34D21D1/22D21C5/00D21H23/22
CPCD21B1/345D21C5/00D21D1/22D21F11/02D21H21/16D21H23/22D21H27/10
Inventor 赵新民邱旭峰杨柳青林俊辉刘敏陈宪周雪萍
Owner 浙江恒川新材料有限公司
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