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Cellulose-based fluoride-free hot-oil-proof packaging paper and preparation method thereof

A cellulose-based, heat-proof oil technology, applied in the directions of wrapping paper, wrapping paper, packaging, etc., can solve the problems of polluted soil and human health effects, reduce the pressure on the ecological environment, improve the effect of heat-proof oil, and have a small particle size. Effect

Inactive Publication Date: 2019-12-20
SHENZHEN YUTO PACKAGING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Now it is inevitable to use fluorine-containing oil repellent in paper tableware. However, in a recent study by Professor Linda S. Lee of Purdue University in the United States, it was found that some paper tableware materials will release pollutants that are harmful to human health during the composting process. Perfluoroalkyl and polyfluoroalkyl substances (PFAS), contaminating soil
Moreover, PFAS will form bioaccumulation by entering crops, and then enter the human body through the food chain, causing long-term impact on human health

Method used

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  • Cellulose-based fluoride-free hot-oil-proof packaging paper and preparation method thereof
  • Cellulose-based fluoride-free hot-oil-proof packaging paper and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A cellulose-based fluorine-free heat-resistant oil wrapping paper is made by the following preparation method, the preparation method comprising:

[0029] Fiber heat-resistant modification steps: first add distilled water and aluminum sulfate to the fiber slurry, mix and stir at 50°C for 120 minutes; then add sodium hydroxide, continue stirring at 50°C for 120 minutes; finally cool and wash until washed The liquid is neutral, and the filtrate is removed to obtain the heat-resistant modified fiber; wherein, the mass ratio of the fiber slurry: the aluminum sulfate: the sodium hydroxide: the distilled water is 1:10:12:66 .

[0030] Paper making step: the heat-resistant modified fiber is formed, pressed and dried to obtain the paper.

[0031] Preparation steps of cellulose nanofibrils: according to the ratio of bleaching pulp: N-methylmorpholine-N-oxide aqueous solution of 1:85, bleached softwood pulp is added to 90% N-methylmorpholine-N -Oxide aqueous solution, pretreatm...

Embodiment 2

[0035] A cellulose-based fluorine-free heat-resistant oil wrapping paper is made by the following preparation method, the preparation method comprising:

[0036] Fiber heat-resistant modification steps: first add distilled water and aluminum sulfate to the fiber slurry, mix and stir at 70°C for 30 minutes; then add sodium hydroxide, continue stirring at 70°C for 30 minutes; finally cool and wash until washed The liquid is neutral, and the filtrate is removed to obtain the heat-resistant modified fiber; wherein, the mass ratio of the fiber slurry: the aluminum sulfate: the sodium hydroxide: the distilled water is 1:15:18:77 .

[0037] Paper making step: the heat-resistant modified fiber is formed, pressed and dried to obtain the paper.

[0038] Preparation steps of cellulose nanofibrils: according to the ratio of bleaching pulp: N-methylmorpholine-N-oxide aqueous solution of 1:90, bleached softwood pulp is added to the concentration of 90% N-methylmorpholine-N -Oxide aqueous ...

Embodiment 3

[0042] A cellulose-based fluorine-free heat-resistant oil wrapping paper is made by the following preparation method, the preparation method comprising:

[0043] Fiber heat-resistant modification step: first add distilled water and aluminum sulfate to the fiber slurry, mix and stir at 60°C for 75 minutes; then add sodium hydroxide, continue stirring at 60°C for 75 minutes; finally cool and wash until washed The liquid is neutral, and the filtrate is removed to obtain the heat-resistant modified fiber; wherein, the mass ratio of the fiber slurry: the aluminum sulfate: the sodium hydroxide: the distilled water is 1:12:15:70 .

[0044] Paper making step: the heat-resistant modified fiber is formed, pressed and dried to obtain the paper.

[0045]Preparation steps of cellulose nanofibrils: according to the ratio of bleaching pulp: N-methylmorpholine-N-oxide aqueous solution of 1:95, bleached softwood pulp is added to 90% N-methylmorpholine-N -Oxide aqueous solution, pretreatment ...

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Abstract

The invention provides cellulose-based fluoride-free hot-oil-proof packaging paper. The cellulose-based fluoride-free hot-oil-proof packaging paper is prepared by coating paper with a coating, whereinthe coating comprises the components in parts by weight: 2 to 5 parts by weight of a cellulose nano-fibril suspension, 1 part by weight of nano-clay, 0.5 to 1.5 parts by weight of a soybean protein adhesive and 93.5 to 96.5 parts by weight of distilled water; the coating amount of the coating is 1-5 g / m< 2>; the paper is made of heat-resistant modified fibers. The packaging paper obtained by coating heat-resistant modified paper with the coating containing the cellulose nanofibrils, the nano-clay and the soybean protein adhesive, due to the fact that the used materials are easy to degrade anddo not contain fluorine, pollution caused by fluorine-containing products is effectively avoided, and the ecological environment pressure is reduced. The nano-clay is small in particle size and largein surface area and is tightly combined with the cellulose nanofibrils, and a continuous and compact silicon-containing ceramic carbon layer is formed on the surface of the paper, so that a blockingeffect on hot oil transfer is achieved, and the hot oil prevention effect of the heat-resistant modified paper is improved.

Description

technical field [0001] The invention relates to the technical field of packaging materials, in particular to a cellulose-based fluorine-free heat-resistant oil packaging paper and a preparation method thereof. Background technique [0002] Now it is inevitable to use fluorine-containing oil repellent in paper tableware. However, in a recent study by Professor Linda S. Lee of Purdue University in the United States, it was found that some paper tableware materials will release pollutants that are harmful to human health during the composting process. Perfluoroalkyl and polyfluoroalkyl substances (PFAS), polluting soil. Moreover, PFAS will form bioaccumulation by entering crops, and then enter the human body through the food chain, causing long-term effects on human health. Since 2018, the local government has passed a bill prohibiting the inclusion of all PFAS in paper tableware materials. For our country, the paper tableware packaging materials in our country also contain P...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/10D21H23/52D21H19/40D21H19/52
CPCD21H19/40D21H19/52D21H23/52D21H27/10
Inventor 王华君谢俊贤俞朝晖杨仁党韩国程沈祖广
Owner SHENZHEN YUTO PACKAGING TECH
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