CN115233499A - High-bulk household paper and preparation method thereof - Google Patents

Abstract

The invention relates to the technical field of household paper, and discloses high-bulk household paper and a preparation method thereof, wherein the high-bulk household paper comprises the following raw materials in parts by weight: 90-95 parts of raw wood pulp, 2-8 parts of sodium bicarbonate, 1 part of softening agent and 1 part of essence. The invention adds the acid sodium bicarbonate powder into the paper pulp with the regulated concentration during the paper making process to uniformly disperse the sodium bicarbonate in the paper pulp, carries out drying and forming by using a drying cylinder with the paper pulp in a vacuum furnace, carries out hot air drying treatment on the paper pulp by using hot air, heats and decomposes the sodium bicarbonate by using the hot air to generate carbon dioxide, simultaneously, gas in water in the paper pulp is outwards dispersed due to the vacuum environment, and the gas and the carbon dioxide are directly diffused from the inner side of the paper pulp to the outer side, so that enough micro air cavities are generated in the paper raw material after the drying and forming, the bulk of the paper is increased, the softness of the paper is improved, and the material consumption is reduced.

Description

High-bulk household paper and preparation method thereof

Technical Field

The invention relates to the technical field of household paper, in particular to high-bulk household paper and a preparation method thereof.

Background

With the improvement of living standards of people, the requirements of people on the functions of household paper are higher and higher, the strength and the softness of the paper are required, the bulk is an important physical characteristic index of the household paper, under the same condition, the high-bulk household paper can bring the improvement of the thickness and the softness of the paper, consumers want to obtain thick and soft household paper, and for paper making enterprises, if the high-bulk can be achieved, the requirements of the consumers on the use characteristics of the household paper can be met while the production cost is reduced by using less fiber materials.

The bulk of paper is another index representing the density degree of paper, and it refers to the volume of a certain weight of paper, and the value is the reciprocal of the tightness, and the unit is cm3/g, generally speaking, in order to increase the bulk of paper, it will mainly be considered from the following two aspects, one is the fiber pulp characteristic, and the other is the paper making technology, but the fiber pulp characteristic has been difficult to continue to improve, needs to improve the bulk of paper in the technology, the prior art increases the bulk of paper by using a scraper through the creping technology, the produced paper has general hand feeling, and there is material waste. Therefore, the high-bulk household paper and the preparation method thereof are provided.

Disclosure of Invention

The invention aims to provide high-bulk household paper and a preparation method thereof, and solves the problems in the background art.

In order to achieve the purpose, the invention provides the following technical scheme: the high bulk household paper comprises the following raw materials in parts by weight: 90-95 parts of native wood pulp, 2-8 parts of sodium bicarbonate, 1 part of softening agent and 1 part of essence.

In a preferred embodiment of the present invention, 90 parts of raw wood pulp, 7 parts of sodium bicarbonate, 1 part of a softening agent, 1 part of a dispersing agent, and 1 part of a perfume are used.

In a preferred embodiment of the present invention, 94 parts of raw wood pulp, 3 parts of sodium bicarbonate, 1 part of a softening agent, 1 part of a dispersing agent, and 1 part of a perfume are added.

As a preferred embodiment of the invention, the preparation steps are as follows:

a. weighing the raw materials in parts by weight;

the method comprises the following steps: sending the primary wood pulp into a hydropulper, simultaneously adding a softening agent and a dispersing agent, pulping the wood pulp by using the hydropulper, enabling the pulped wood pulp to flow into a pulp tank, lifting the wood pulp into a high-frequency vibrating screen by a pulp lifting pump, screening the wood pulp by using the high-frequency vibrating screen and separating impurities, then lifting the wood pulp into a rinsing machine by the pulp lifting pump, and washing and bleaching the wood pulp;

step two: the wood pulp after the treatment is put into a pulping machine, the wood pulp is ground into fine pulp through pulping, then the fine pulp is sent into a sand setting table, impurities such as sand ash and the like are precipitated and separated out through the sand setting table, pure pulp is prepared, then the concentration of the paper pulp is adjusted to be proper, and then powdery sodium bicarbonate is added into the wood pulp and is fully mixed;

step three: paper pulp is attached to the outer surface of a drying cylinder to form a paper base layer, then the paper base layer is conveyed into a vacuum furnace, the paper base layer on the surface of the drying cylinder is dried by the vacuum furnace, in the process, sodium bicarbonate is heated and divided into more carbon dioxide under the action of high-temperature heating, meanwhile, gas in water in the paper pulp is diffused outwards due to the vacuum environment, the gas and the carbon dioxide are diffused from the inner side to the outer side in the drying and forming process to form more micro air cavities, and the bulk of the formed paper raw material is improved;

step four: spraying the essence on the surface of paper material in mist form, drying, making into toilet paper material, and processing to obtain the final product.

As a preferred embodiment of the present invention, the virgin wood pulp refers to pulp made by extracting fibers by wood chip cooking.

In a preferred embodiment of the present invention, the powdered sodium bicarbonate in the second step is first ground into a fine powder by a grinder to ensure that it can be dissolved in the pulp with a high concentration.

In a preferred embodiment of the present invention, the drying temperature of the vacuum furnace in the third step is 110-125 ℃, and the pressure in the vacuum furnace needs to be kept stable during the drying process.

As a preferred embodiment of the present invention, in the fourth step, the raw material of toilet paper is made into long-strip toilet paper by a rewinding machine, and then made into finished toilet paper by a band saw paper cutting machine, and finally packaged.

Compared with the prior art, the invention has the following beneficial effects:

the invention adds the powder of the sodium bicarbonate into the paper pulp with the adjusted concentration during the paper making process to uniformly disperse the sodium bicarbonate in the paper pulp, utilizes the mesh groove to carry out drying and forming on the paper pulp in a vacuum furnace, hot air carries out hot air drying treatment on the paper pulp, the hot air leads the sodium bicarbonate to be heated and decomposed to generate carbon dioxide, simultaneously, the gas in the water in the paper pulp is outwards diffused due to the vacuum environment, the gas and the carbon dioxide are directly diffused from the inner side to the outer side of the paper pulp, and further, enough micro air cavities are generated in the paper raw material after the drying and forming, thereby increasing the bulk of the paper, improving the softness of the paper and reducing the material consumption.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a flow chart of the high bulk tissue paper and the preparation method thereof.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained by combining the specific embodiments.

Referring to fig. 1, the present invention provides a technical solution: the high bulk household paper comprises the following raw materials in parts by weight: 90-95 parts of native wood pulp, 2-8 parts of sodium bicarbonate, 1 part of softening agent and 1 part of essence.

Further, 90 parts of raw wood pulp, 7 parts of sodium bicarbonate, 1 part of a softening agent, 1 part of a dispersing agent and 1 part of essence.

Further, 94 parts of native wood pulp, 3 parts of sodium bicarbonate, 1 part of a softening agent, 1 part of a dispersing agent and 1 part of essence.

Further, the preparation steps are as follows:

a. weighing the raw materials in parts by weight;

the method comprises the following steps: sending the primary wood pulp into a hydrapulper, adding a softening agent and a dispersing agent at the same time, pulping the wood pulp by using the hydrapulper, enabling the pulped wood pulp to flow into a pulp tank, lifting the wood pulp into a high-frequency vibrating screen by a pulp lifting pump, screening the wood pulp by using the high-frequency vibrating screen and separating impurities, then lifting the wood pulp into a rinsing machine by the pulp lifting pump, and performing pulp washing and bleaching operations on the wood pulp;

step two: the wood pulp after the treatment is put into a pulping machine, is ground into fine pulp by pulping, and is sent into a sand setting table, impurities such as sand ash and the like are precipitated and separated by the sand setting table, and are prepared into pure pulp, then the concentration of the paper pulp is adjusted to be proper, and then the powdery sodium bicarbonate is added into the wood pulp and is fully mixed;

step three: paper pulp is attached to the outer surface of a drying cylinder to form a paper base layer, then the paper base layer is conveyed into a vacuum furnace, the paper base layer on the surface of the drying cylinder is dried by the vacuum furnace, in the process, sodium bicarbonate is heated and separated into more carbon dioxide under the action of high-temperature heating, meanwhile, gas in water in the paper pulp is diffused outwards due to the vacuum environment, the gas and the carbon dioxide are diffused from the inner side to the outer side in the drying and forming process to form more micro air cavities, and the bulk of the formed paper raw material is improved;

step four: the essence is evenly sprayed on the surface of the paper raw material in a mist shape and dried to prepare the toilet paper raw material, and finally the toilet paper raw material is processed to prepare the finished product of the paper for daily use.

Further, the virgin wood pulp refers to pulp made by extracting fibers by wood chip cooking.

Furthermore, the powdery sodium bicarbonate in the second step is firstly ground into fine powder by a grinder to ensure that the powdery sodium bicarbonate can be dissolved in the pulp with higher concentration.

Furthermore, the drying temperature of the vacuum furnace in the third step is 110-125 ℃, and the pressure in the vacuum furnace needs to be kept stable in the drying process.

Further, in the fourth step, the raw material of the toilet paper is made into long-strip toilet paper by entering a rewinding machine, then the finished product toilet paper is made by a band saw cutting machine, and finally the finished product toilet paper is packaged.

Example one

The household paper comprises the following raw materials in parts by weight: 90 parts of native wood pulp, 7 parts of sodium bicarbonate, 1 part of softening agent, 1 part of dispersing agent and 1 part of essence.

The preparation steps are as follows:

a. weighing the raw materials in parts by weight;

the method comprises the following steps: sending the primary wood pulp into a hydrapulper, adding a softening agent and a dispersing agent at the same time, pulping the wood pulp by using the hydrapulper, enabling the pulped wood pulp to flow into a pulp tank, lifting the wood pulp into a high-frequency vibrating screen by a pulp lifting pump, screening the wood pulp by using the high-frequency vibrating screen and separating impurities, then lifting the wood pulp into a rinsing machine by the pulp lifting pump, and performing pulp washing and bleaching operations on the wood pulp;

step two: the wood pulp after the treatment is put into a pulping machine, the wood pulp is ground into fine pulp through pulping, then the fine pulp is sent into a sand setting table, impurities such as sand ash and the like are precipitated and separated out through the sand setting table, pure pulp is prepared, then the concentration of the paper pulp is adjusted to be proper, and then powdery sodium bicarbonate is added into the wood pulp and is fully mixed;

step three: paper pulp is attached to the outer surface of a drying cylinder to form a paper base layer, then the paper base layer is conveyed into a vacuum furnace, the paper base layer on the surface of the drying cylinder is dried by the vacuum furnace, in the process, sodium bicarbonate is heated and separated into more carbon dioxide under the action of high-temperature heating, meanwhile, gas in water in the paper pulp is diffused outwards due to the vacuum environment, the gas and the carbon dioxide are diffused from the inner side to the outer side in the drying and forming process to form more micro air cavities, and the bulk of the formed paper raw material is improved;

step four: spraying the essence on the surface of paper material in mist form, drying, making into toilet paper material, and processing to obtain the final product.

Example two

The household paper comprises the following raw materials in parts by weight: 94 parts of raw wood pulp, 3 parts of sodium bicarbonate, 1 part of softening agent, 1 part of dispersing agent and 1 part of essence.

The preparation steps are as follows:

a. weighing the raw materials in parts by weight;

the method comprises the following steps: sending the primary wood pulp into a hydrapulper, adding a softening agent and a dispersing agent at the same time, pulping the wood pulp by using the hydrapulper, enabling the pulped wood pulp to flow into a pulp tank, lifting the wood pulp into a high-frequency vibrating screen by a pulp lifting pump, screening the wood pulp by using the high-frequency vibrating screen and separating impurities, then lifting the wood pulp into a rinsing machine by the pulp lifting pump, and performing pulp washing and bleaching operations on the wood pulp;

step two: the wood pulp after the treatment is put into a pulping machine, the wood pulp is ground into fine pulp through pulping, then the fine pulp is sent into a sand setting table, impurities such as sand ash and the like are precipitated and separated out through the sand setting table, pure pulp is prepared, then the concentration of the paper pulp is adjusted to be proper, and then powdery sodium bicarbonate is added into the wood pulp and is fully mixed;

step three: paper pulp is attached to the outer surface of a drying cylinder to form a paper base layer, then the paper base layer is conveyed into a vacuum furnace, the paper base layer on the surface of the drying cylinder is dried by the vacuum furnace, in the process, sodium bicarbonate is heated and separated into more carbon dioxide under the action of high-temperature heating, meanwhile, gas in water in the paper pulp is diffused outwards due to the vacuum environment, the gas and the carbon dioxide are diffused from the inner side to the outer side in the drying and forming process to form more micro air cavities, and the bulk of the formed paper raw material is improved;

step four: spraying the essence on the surface of paper material in mist form, drying, making into toilet paper material, and processing to obtain the final product.

The conventional household paper data parameters table 1 are as follows:

test items	Flexibility	Quality of paper	Cost of preparation
				Index of parameter	In general	Superior food	High (a)

Example a household paper data parameters table 2 is as follows:

test items	Flexibility	Quality of paper	Cost of preparation
				Index of parameter	Good quality	Superior food	Is low in

Example two household paper data parameters table 3 is as follows:

test items	Flexibility	Quality of paper	Cost of preparation
				Parameter index	Superior food	Youyou (an instant noodle)	Is low in

To sum up, referring to the data comparison of table 1, table 2 and table 3, the present invention adds the powder of sodium bicarbonate into the paper pulp with the adjusted concentration during the paper making process, so that the sodium bicarbonate is uniformly dispersed in the paper pulp, the paper pulp is dried and formed by using the mesh groove belt pulp in the vacuum furnace, the paper pulp is hot air dried by hot air, the sodium bicarbonate is heated and decomposed by the hot air to generate carbon dioxide, meanwhile, the gas in the water in the paper pulp is outwards diffused due to the vacuum environment, the gas and the carbon dioxide are directly diffused from the inner side to the outer side of the paper pulp, and then sufficient micro air cavities are generated in the paper raw material after the drying and forming, thereby increasing the bulk of the paper, improving the softness thereof and reducing the material consumption, and the present invention has good quality and lower production cost.

While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (8)

1. A high bulk household paper and a preparation method thereof are characterized in that: 90-95 parts of raw wood pulp, 2-8 parts of sodium bicarbonate, 1 part of softening agent and 1 part of essence.

2. The high bulk tissue paper and the method of making the same according to claim 1, wherein: 90 parts of native wood pulp, 7 parts of sodium bicarbonate, 1 part of softening agent, 1 part of dispersing agent and 1 part of essence.

3. The high bulk tissue paper and the method of making the same according to claim 1, wherein: 94 parts of raw wood pulp, 3 parts of sodium bicarbonate, 1 part of softening agent, 1 part of dispersing agent and 1 part of essence.

4. The high bulk tissue paper and the method of making the same according to claim 1, wherein: the preparation steps are as follows:

a. weighing the raw materials in parts by weight;

the method comprises the following steps: sending the primary wood pulp into a hydrapulper, adding a softening agent and a dispersing agent at the same time, pulping the wood pulp by using the hydrapulper, enabling the pulped wood pulp to flow into a pulp tank, lifting the wood pulp into a high-frequency vibrating screen by a pulp lifting pump, screening the wood pulp by using the high-frequency vibrating screen and separating impurities, then lifting the wood pulp into a rinsing machine by the pulp lifting pump, and performing pulp washing and bleaching operations on the wood pulp;

step two: the wood pulp after the treatment is put into a pulping machine, the wood pulp is ground into fine pulp through pulping, then the fine pulp is sent into a sand setting table, impurities such as sand ash and the like are precipitated and separated out through the sand setting table, pure pulp is prepared, then the concentration of the paper pulp is adjusted to be proper, and then powdery sodium bicarbonate is added into the wood pulp and is fully mixed;

step three: paper pulp is attached to the outer surface of a drying cylinder to form a paper base layer, then the paper base layer is conveyed into a vacuum furnace, the paper base layer on the surface of the drying cylinder is dried by the vacuum furnace, in the process, sodium bicarbonate is heated and divided into more carbon dioxide under the action of high-temperature heating, meanwhile, gas in water in the paper pulp is diffused outwards due to the vacuum environment, the gas and the carbon dioxide are diffused from the inner side to the outer side in the drying and forming process to form more micro air cavities, and the bulk of the formed paper raw material is improved;

step four: spraying the essence on the surface of paper material in mist form, drying, making into toilet paper material, and processing to obtain the final product.

5. The high bulk tissue paper and the method of making the same according to claim 4, wherein: virgin wood pulp refers to pulp made by extracting fibers by wood chip cooking.

6. The high bulk tissue paper and the method of making the same according to claim 4, wherein: and grinding the powdery sodium bicarbonate in the step two to be fine powder by a grinder so as to ensure that the powdery sodium bicarbonate can be dissolved in the pulp with higher concentration.

7. The high bulk tissue paper and the method of making the same according to claim 4, wherein: and the drying temperature of the vacuum furnace in the third step is 110-125 ℃, and the pressure in the vacuum furnace needs to be kept stable in the drying process.

8. The high bulk tissue and the method of making the same of claim 4, wherein: and in the fourth step, the raw materials of the toilet paper are made into long-strip toilet paper by a rewinder, then the toilet paper is made into finished toilet paper by a band saw paper cutting machine, and finally the toilet paper is packaged.

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