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A preparation method of highly water-resistant food packaging paper and its beating and stirring device

A water-based food and stirring device technology, which is applied in pulp beating methods, textiles and papermaking, papermaking, etc., can solve the problems of softness, poor folding resistance, and low water resistance requirements, and achieve cost savings, increase strength and burst resistance Degree, the effect of avoiding loss

Active Publication Date: 2021-07-30
ZHEJIANG KAIFENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional food packaging paper does not require high water resistance of paper, and some food packaging also requires paper to have certain water absorption and air permeability, but for liquid food packaging, in order to prevent liquid penetration and have a certain carrying capacity At present, high-weight food packaging cardboard is mostly used in the market to enhance the carrying capacity of liquids, but the softness and folding resistance are poor

Method used

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  • A preparation method of highly water-resistant food packaging paper and its beating and stirring device
  • A preparation method of highly water-resistant food packaging paper and its beating and stirring device
  • A preparation method of highly water-resistant food packaging paper and its beating and stirring device

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Embodiment 1

[0031]A preparation method of high water-resistance food wrapping paper, comprising the steps of: disintegrating bleached softwood pulp and hardwood pulp in a ratio of 1.5:1 into a pulp solution with a concentration of 3% in a disintegrator, passing through a beating device Processing, control the pulp degree of pulp liquid is 35 ° SR, and fiber wet weight is 3.0g, adds 0.2% food-grade wet-strength agent of absolute dry pulp total mass in the slurry after beating treatment, and the viscosity of food-grade wet-strength agent is in It is 40mpa.s at 25°C, and the pH value at 21°C is 4. Purify the proportioned slurry and dry it in multiple cylinders by fourdrinier netting. In the middle of drying, apply food-grade polyvinyl alcohol and soft The mixed solution of food grade polyvinyl alcohol, after soaking in cold water at 20°C for 1 hour, prepared to a concentration of 2%, heated to 95°C to accelerate dissolution, stirring speed 70-100r / min, stopped stirring after complete dissolut...

Embodiment 2

[0033] A preparation method of high water-resistance food wrapping paper, comprising the following steps: disintegrate bleached softwood pulp and hardwood pulp with a ratio of 2:1 in a calculator into a pulp liquid with a concentration of 5%, and pass through a beating device Processing, control the pulp degree of pulp liquid is 38 ° SR, and fiber wet weight is 3.5g, adds 1.0% food-grade wet-strength agent of absolute dry pulp total mass in the slurry after beating treatment, and the viscosity of food-grade wet-strength agent is in It is 100mpa.s at 25°C, and the PH value at 21°C is 6. Purify the proportioned slurry and dry it through fourdrinier forming in multiple cylinders. In the middle of drying, apply food-grade polyvinyl alcohol and soft The mixed solution of food grade polyvinyl alcohol, after soaking in cold water at 20°C for 1 hour, prepared to a concentration of 2%, heated to 95°C to accelerate dissolution, stirring speed 70-100r / min, stopped stirring after complete ...

Embodiment 3

[0035] A preparation method of high water-resistance food wrapping paper, comprising the following steps: disintegrate bleached softwood pulp and hardwood pulp with a ratio of 3:1 in a calculator into a pulp liquid with a concentration of 5%, and pass through a beating device Processing, control the pulp degree of pulp liquid is 40 ° SR, and fiber wet weight is 4.0g, adds 2.0% food grade wet strength agent of absolute dry pulp total mass in the slurry after beating treatment, and the viscosity of food grade wet strength agent is in It is 100mpa.s at 25°C, and the PH value at 21°C is 6. Purify the proportioned slurry and dry it through fourdrinier forming in multiple cylinders. In the middle of drying, apply food-grade polyvinyl alcohol and soft The mixed solution of food grade polyvinyl alcohol, after soaking in cold water at 20°C for 1 hour, prepared to a concentration of 2%, heated to 95°C to accelerate dissolution, stirring speed 70-100r / min, stopped stirring after complete ...

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Abstract

The invention discloses a preparation method of high water-resistance food wrapping paper and a beating and stirring device thereof. Through a plurality of process steps, a sizing agent is applied on the surface of the paper to further improve the strength and burst resistance of the paper. By adjusting The pressure of the top roller of the drying cylinder can flexibly control the air permeability of the paper. By providing a preparation method of high water-resistant food packaging paper, the water resistance, strength, softness, folding resistance and bursting resistance of the food packaging paper are multi-dimensional. Both indicators meet the requirements of the modern food packaging industry. The integration of the beating and stirring device can not only automate the operation, but also fundamentally avoid the loss of the slurry from the beating tank to the pulp mixing tank, saving costs, and by setting the cycle The liquid tank can obtain the required slurry according to different situations.

Description

technical field [0001] The invention relates to the technical field of special paper, in particular to a preparation method of highly water-resistant food wrapping paper and a beating device thereof. Background technique [0002] Food packaging paper is a packaging product with pulp and cardboard as the main raw material. On the one hand, the packaged food is healthy and hygienic and easy to degrade after being discarded. Water drying and other advantages are more and more popular. However, traditional food packaging paper does not require high water resistance of paper, and some food packaging also requires paper to have certain water absorption and air permeability, but for liquid food packaging, in order to prevent liquid penetration and have a certain carrying capacity At present, high-weight food packaging cardboard is mostly used in the market to enhance the carrying capacity of liquids, but the softness and folding resistance are poor. To this end, we propose a meth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21F11/00D21D1/02
Inventor 计皓张琦王幸邱慈祥安田田何红梅刘佳文
Owner ZHEJIANG KAIFENG NEW MATERIAL CO LTD
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