WO2011152574A1 - Method for manufacturing traditional korean paper having improved printability - Google Patents

Abstract

The present invention relates to a method for manufacturing traditional Korean paper having improved printability, and more particularly, to a method for manufacturing traditional Korean paper having greatly improved printability, including superior color and definition, and almost no smearing and the like, while maintaining the unique characteristic of traditional Korean paper. The present invention comprises the steps of: mixing 40-60 wt% of mulberry pulp and 40-60 wt% of cotton pulp; and applying a starch coating to the mixture.

Description

Manufacturing method of Korean paper with improved printability

The present invention relates to a method for manufacturing Hanji with improved printability, and to a method for manufacturing Hanji with greatly improved printability, such as excellent color development and clarity and little bleeding during printing while maintaining the unique characteristics of the paper. will be.

Abraham Maslow said that the five-level needs of humans start with physiological needs and develop into self-realization needs. Experts on social phenomena have surpassed US $ 20,000 per capita as of 2007, and this material abundance is why, how and how to eat and live, which is Maslow's first step. In other words, we expect to move to higher values of what to eat and live.

Recently, the art market, which has been regarded as the exclusive property of high-end culture and enthusiasts and enthusiasts, has entered the stage of popularization and commercialization. The appearance of digital fine art paper can purchase expensive works for less than 1 million won. Backgrounds are in place, and the demand is steadily increasing.

Digital fine art paper must satisfy the conditions for optimum expression and storage, corresponding to the irregularities of each type, good transferability of ink from plate to paper, and excellent physical and chemical durability because it is made of high quality fiber.

Under these conditions, art papers currently imported from Germany and France use 100% cotton or rag pieces of cotton fibers. Art papers made from these materials are known to have excellent printability as well as moisture absorption and oil absorption properties.

On the other hand, in the case of Hanji, it exhibits unique surface characteristics that cannot be mimicked by any one, and is excellent in hygroscopicity and oil absorption, and has been widely used for about 1,000 years or more. The conditions for the durability of the fibers and the preservation of the art paper are the strong fibers and the preservation properties, which are represented by Hanji. However, in the case of Hanji, there is a problem that it is inappropriate to use as printing paper because of the bleeding.

The present invention for solving the conventional problems of the paper, improved printability, which can produce Hanji, which greatly improves printability, such as excellent color development and clarity and little smearing while maintaining the unique characteristics of the paper. The purpose is to provide a manufacturing method.

The present invention for achieving the object of the present invention as described above,

40-60% by weight of doc pulp and 40-60% by weight of cotton pulp is mixed with dissociated pulp and papermaking using a starch coating method characterized in that it comprises a step of coating the printability To provide.

In particular, the starch coating is preferably made using corn starch.

In addition, the starch coating is preferably made using a corn starch solution of 4 ~ 5% concentration.

And it is preferable to make paper in the state which added the neutral size agent with respect to the said pulp mixture.

More preferably, the neutral size agent is added in an amount of 0.1 to 0.2% based on 100 parts by weight of the pulp mixture.

Hereinafter, a method of manufacturing Hanji with improved printability of the present invention will be described in detail.

The manufacturing method of the Korean paper with improved printability of the present invention comprises the step of starch coating after papermaking using a pulp mixture of the pulping pulp and cotton pulp.

The pulp mixture is made of a mixture of 40 to 60% by weight of the pulping pulp and 40 to 60% by weight of the cotton pulp. When cotton pulp is mixed at less than 40% by weight, durability for preservation is increased, but there is a problem that the color development of ink is lowered. This has a problem of deterioration.

The papermaking method using the pulp mixture may be made by using a long mesh paper machine or a ring paper paper machine, or may also be made by using a long paper paper machine and a ring paper paper machine. On the other hand, when the pulp mixture is paper-making using a long mesh paper machine, the paper pulp and cotton pulp are dissociated in a separate high-altitude tank and then fed to the head box for papermaking. When papermaking is carried out using a ring paper machine, pulps and cotton pulp are supplied to the batt and dissociated with the pulp mixture, and the paper is adsorbed.

And it is preferable to make paper in the state which added the neutral size agent with respect to the said pulp mixture in order to suppress the invasion of ink into the paper at the time of printing, and to improve print quality. As the neutral sizing agent, AKD (alkyl ketone dimer), ASA (alkyl succinic anhydride) and the like can be used.

In particular, it is more preferable to add 0.1-0.2 weight part of said neutral size agents with respect to 100 weight part of said pulp mixtures. When the neutral size agent is added less than 0.1 parts by weight, the ink does not effectively inhibit invasion into the hanji, and when added in excess of 0.2 parts by weight, ASA is present in which ASA does not react with the fiber and is hydrolyzed by water on the way. Converted into a material that reduces the sizing effect, AKD can improve the adhesion of the toner, but the surface friction coefficient is low, there is a problem that frequently occurs when the paper feed.

Next, the paper is coated using the pulp mixture followed by starch coating. The starch coating method is a method of spray coating the starch solution in a wetland state after papermaking using the pulp mixture, and drying and pressing after obtaining paper sheet using the pulp mixture, and then using the bar to make the starch solution. The method of apply | coating to one side or both sides of the etc.

The starch coating is preferably made using corn starch. Corn starch has a higher viscosity than other starches and has good gel formation, which may further improve printability. In particular, starch coating using a corn starch solution of 4 ~ 5% concentration is good. When using a corn starch solution of less than 4% concentration is not excellent in color and clarity, using a corn starch solution of more than 5% concentration has a problem of lowering the unique surface properties of hanji, lowering the corrosion resistance.

According to the present invention, by mixing cotton pulp with paper pulp and manufacturing paper for starch coating, it is possible to improve the printability, such as excellent color development and clarity and little bleeding during printing while maintaining the unique properties of the paper. There is an effect that can be prepared.

1 to 6 are enlarged views of images printed on Examples 1 to 5 and Comparative Example 1. FIG.

Hereinafter, a method for manufacturing Hanji with improved printability of the present invention will be described in detail with reference to Examples. The scope of the present invention is not limited to the following Examples.

Example 1

The pulps and cotton pulp were added to the algae, and after dissociation and beating, they were fed to the head box of the long-term paper machine and then paper-making. At this time, the duck pulp and cotton pulp was mixed at a 60:40 mixing ratio, and 0.1% of a neutral size agent was added thereto. AKD was used as the neutral size agent.

Hanji paper of Example 1 was prepared by spraying corn starch solution of 4% concentration in a wetland wetland obtained by papermaking with a starch paper machine, followed by drying and pressing.

Example 2

Unlike Example 1, the pulping pulp and cotton pulp were mixed at a 50:50 mixing ratio, and 0.2% of the neutral size agent was added to prepare Hanji of Example 2.

Example 3

Unlike Example 1, the pulping pulp and cotton pulp was mixed at a 40:60 mixing ratio, and starch was coated using a 5% corn starch solution to prepare Korean paper of Example 3.

Example 4

Unlike Example 1, starch coating was performed using corn starch solution at a concentration of 3% to prepare Korean paper of Example 4.

Example 5

Unlike Example 1, starch was coated using a corn starch solution at a concentration of 6% to prepare Korean paper of Example 5.

Comparative Example 1

Comparative Example 1 purchased and used Hanji that is commercially available.

Test Example 1 Printability Test

A circle of about 2 cm in diameter was printed in black using a Cannon S100SP inkjet printer on the Korean paper of Examples 1 to 5 and Comparative Example 1, and the degree of smearing of the ink was visually evaluated, and the density of color was measured by a colorimeter. (Nippon Denshoku JP / NF-333, Spectro photometer) was used to measure the density of the printed ink spot. The printed image was scanned with a scanner and then enlarged to show in FIGS. 1 to 6, and the measurement results of the density of the printed ink spots are shown in Table 1.

Table 1 Measurement result of density of printed ink spot

	Example 1	Example 2	Example 3	Example 4	Example 5	Comparative Example 1
Density	1.316	1.329	1.307	1.267	1.298	1.217

In Examples 1 to 5, the bleeding degree of the ink was low, so that the printability was excellent, whereas in Comparative Example 1, the bleeding degree of the ink was relatively severe. On the other hand, in Examples 1 to 3 and 5, the degree of bleeding was relatively lower than that of Example 4.

In addition, in Examples 1 to 5, Density was 1.267 or more, which was higher than that of Comparative Example 1, which was 1.217.

[Test Example 2] Thermal shortening and abrasion resistance test

Tensile index and folding endurance of the MD (Machine Direction) direction of the paper of Examples 1 to 5 and Comparative Example 1 were measured. Thermal shortening (MD) was measured by the test method of TAPPI Standard T 424 om-88, and the anti-theft (MD) was measured according to the test method of TAPPI Standard T 402 om-88. The results are shown in Table 2.

TABLE 2 Thermal shortness and heat resistance measurement result

	Example 1	Example 2	Example 3	Example 4	Example 5	Comparative Example 1
Tensile index (km)	5.09	5.14	5.60	5.25	4.91	4.74
Folding endurance (time)	531	501	516	496	412	506

As shown in Table 2, in Examples 1 to 5, the thermal shortening was excellent at 4.91 km or more, and the heat resistance was also high at 412 or more. On the other hand, in the case of Example 5 was evaluated relatively low compared to Examples 1 to 4.

According to the present invention, it is possible to manufacture Hanji, which has greatly improved printability, such as excellent color development and clarity and little smearing, while maintaining the unique characteristics of the Korean paper.

Claims (5)

1. 40-60% by weight of doc pulp and 40-60% by weight of cotton pulp is mixed with dissociated pulp and papermaking using a starch coating method characterized in that it comprises a step of coating the printability .
2. The method of claim 1,

   The starch coating is a method of manufacturing a printing paper, characterized in that made using corn starch.
3. The method of claim 2,

   The starch coating is a printing method of improving the printability, characterized in that using 4 to 5% corn starch solution.
4. The method of claim 1,

   The papermaking method with improved printability, characterized in that the paper pulp mixture with a neutral size agent added.
5. The method of claim 4, wherein

   The neutral paper size improves the printability, characterized in that the addition of 0.1 to 0.2% to 100 parts by weight of the pulp mixture.

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