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Paper and preparation method thereof

A paper and fiber technology, which is applied in the field of paper and its preparation, can solve the problems that the strength and softness of paper cannot meet the requirements, and achieve the effect of overcoming mutual inhibition and increasing the strength of paper

Active Publication Date: 2013-06-12
GOLD HONG YE PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The result of the competition may be that neither of them can be well combined with plant fibers, so that the strength and softness of the paper cannot meet the requirements.
And if the dry strength agent is non-ionic, although it will not compete with the adsorption of the softener on the fiber, that is to say, it has little effect on the softness, but the effect of non-ionic dry strength agent on improving the strength is far. Far less effective than cationic dry strength agents

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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Effect test

preparation example Construction

[0012] A method for preparing paper, comprising the steps of:

[0013] (1) The pulp or paddle after pulping treatment is formulated into a fiber suspension with a certain concentration, and the mass percentage concentration of fibers in the fiber suspension is 5%-15%.

[0014] (2) Add a dry strength agent to the fiber suspension, the dry strength agent is a nano-scale polysaccharide or a polysaccharide decomposition product with a molecular weight less than 1000, and stir and mix for a certain period of time to allow the sugar molecules to enter the pulp fiber cells. The dry strength agent is added in an amount of 0.01%-4% of the dry weight of the pulp fiber, preferably 0.1%-1% of the dry weight of the pulp fiber. The dry strength agent can be fine particles of plant fiber, starch or chitosan cut and polished by physical methods, such as nano-scale fiber, starch, chitosan and the like. The dry strength agent (decomposition product of polysaccharides with a molecular weight le...

Embodiment 1

[0031] Add nano-scale starch granules to the fiber suspension with a mass concentration of 5%, the amount of starch added is 0.5% of the absolute dry weight of the fiber, stir well so that the nano-scale starch granules and fibers are evenly mixed, and then adjust the temperature to 57°C , and maintain it for 2 minutes. Note that constant stirring is required during the process to ensure uniform heating. After the nanoscale starch inside the fiber cells is completely gelatinized, the slurry is cooled to 45°C. Then add a certain amount of water, and add a cationic quaternary ammonium salt. The amount of the cationic quaternary ammonium salt is 0.03% of the absolute dry mass of the fiber. Stir fully so that the cationic quaternary ammonium salt and the fiber are evenly mixed, and finally add a certain amount of water to make the final fiber The mass concentration of the suspension is 0.5%. Then the above fiber suspension is dehydrated and molded by a double-layer head box and a...

Embodiment 2

[0033] Add nano-scale plant fibers to the fiber suspension with a mass concentration of 5%, the plant fiber addition is 0.02% of the absolute dry mass of the fibers, fully stir so that the nano-scale plant fiber particles and fibers are evenly mixed, and then adjust the temperature to 57°C, and maintain it for 2 minutes. Note that constant stirring is required during the process to ensure uniform heating. Then add 0.02% polyacrylamide resin relative to the absolute dry weight of the fiber, and stir evenly. Then add a certain amount of water, and add a cationic quaternary ammonium salt, the amount of the cationic quaternary ammonium salt is 2% of the absolute dry mass of the fiber, stir fully to make the cationic quaternary ammonium salt and the fiber evenly mixed, and finally add a certain amount of water to make the final fiber The mass concentration of the suspension is 0.5%. Then the above fiber suspension is dehydrated and molded by a double-layer head box and a forming w...

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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Abstract

The invention provides a piece of paper. The fiber cell of the paper contains a dry strength agent, wherein the dry strength agent is a nanoscale polysaccharide or a polysaccharide decomposition product with the molecular weight of less than 1,000, and the mass of the dry strength agent is 0.01-4% of that of the absolute-dry mass of the fiber in the paper. The invention also provides a method for preparing the paper. Because the dry strength agent with small molecular weight enters the fiber cell of the paper to support the wall of the fiber cell, the paper forming strength of a fiber can be improved effectively. The dry strength agent has no influence on the efficacy of a softening agent, thus the defect of mutual inhibition of strength and softness in the prior art is overcome, and the strength of the paper is guaranteed, and the paper has good softness.

Description

technical field [0001] The invention relates to a paper and a preparation method thereof. Background technique [0002] With the continuous improvement of living standards, people's quality requirements for household paper are also gradually increasing. People hope that facial tissue, kitchen paper, toilet paper, etc. have good softness, which can give the skin a comfortable feeling, and at the same time, people hope that such paper towels have a certain strength to achieve the desired purpose of use. However, for paper towels made of plant fibers, the strength and softness are often inversely proportional, that is, the increase in strength means that the softness will decrease; and the strength will decrease when the softness increases. At present, people in the industry have proposed many methods to solve this problem. The solution is mainly to add dry strength agents and softeners at the wet end of papermaking, and to make different tensile strengths by adjusting the dif...

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): D21H21/18D21H17/24
Inventor 陈海霞孟凡翠
Owner GOLD HONG YE PAPER
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