KR101520761B1 - Paper using kudzu vine and manufacturing method thereof - Google Patents

Abstract

The present invention relates to stencil paper manufactured by using a kudzu vine and a method for manufacturing the same. According to the present invention, the kudzu vine, which has been disposed, is used to produce the stencil paper which is smoothly disintegrated, provides a high pulp yield, and has excellent quality. The method includes: a cutting step of cutting the kudzu vine without a root and leaves into the length of 40-60 mm; a peeling step of peeling an outer layer of the cut kudzu vine; a steaming step of obtaining pulp by steaming the peeled kudzu vine using an alkali aqueous solution; a washing step of washing the steamed pulp with water; a bleaching step of bleaching the washed pulp with a hydrogen peroxide aqueous solution; a beating step of obtaining a paper stock by beating the bleached pulp; and a stencil paper step of obtaining the stencil paper by processing and drying the paper stock.

Description

[0001] The present invention relates to a paper using a staple and a manufacturing method thereof,

The present invention relates to a raw paper using a rice straw and a manufacturing method thereof, and more particularly, to a paper making method using a rice straw which is capable of producing a raw paper having a high quality yield, And a manufacturing method thereof.

According to the results of a survey on the special crops in Korea, the special crops are classified into fiber raw materials, oil raw materials, dye raw materials, and preferential crops, and 30 kinds of high concentration rice with special crops are recorded.

Among them, twenty-four kinds of textile raw materials are recorded in high pens, and the fiber crops recorded in high pens are hemp, cotton, gumma, mulberry, waterweed, flax, 11, including the spine, pike, and 칡.

Among 11 kinds of fiber crops, pueraria thunbergiana Benth is a perennial deciduous broad-leaved plant belonging to Legninosae, distributed geographically in Japan, China, Taiwan and Manchuria in Northeast Asia and naturalized in North America . There are 10 species in the world and 1 species in Korea. It is a plant that grows wild in sunny area between 100-1,200m above sea level of the whole country and is a plant which is very fertile in the place which is fertile and moisture is suitable.

Recently, the juice and powder extracted from the roots have been attracting attention as health foods and health drinks. The wastes that are discarded here are being studied as resources that can be used as papermaking raw materials.

Due to the recent warming climate, the annual growth rate of 칡 is rapidly increasing. As a result, it not only damages the aesthetics by covering roadside trees and trees in the forests, but also blocks the sunlight and eventually kills the trees.

As a result of the Forest Service in 2009, 150,000 hectares of forests in the whole country have been encroached on the vine plants and spread to the whole country around South Jeonnam and Gyeongnam.

Each provincial organization is reviewing the results of environmentally friendly forested vineyard abatement projects and making continuous efforts to expand the vine removal method. However, recently, the number of postmenopausal forests in the forest has increased and the vines of the roadside exposed to sunlight have been damaged Is increasing rapidly.

The need for the development of available technology as an alternative resource to the 칡 stalk emerged due to the lack of clear measures related to the disposal of vine plants resulting from the continuous vine flow eradication business.

On the other hand, a method of manufacturing a hull net using a root (auger) has been proposed in Japanese Laid-Open Patent Application No. 2002-0090830 and Laid-Open Patent Application No. 2012-0084115. Open Patent Publication No. 2002-0090830 relates to a method for producing a ganggeo paper mainly composed of gangguk (roots) for use on a roasted meat plate made of metal, Is crushed by a crusher to remove starch, and then the confused filamentous fiber is ground.

The present invention also relates to a continuous method for producing the same, and more particularly, to a method for producing a grass root and a continuous production method using pulp and paper pulp in the form of a mixture of disaggregated fibrils, The present invention relates to a method for producing a long length of a long length of a long length of a long length of a long length of a long length of a long length of a long length of a long length of a short length of a long length of a short length.

Since all of the preceding patents are manufactured using 칡 roots instead of 칡 stem, a separate process is required to remove them because it contains a large amount of juice. After removing the juice, the fibers are tangled to each other to smooth There is a problem that it is difficult to produce a high-quality raw paper.

1. Published Japanese Patent Application No. 2002-0090830 2. Open Patent No. 2012-0084115

Disclosure of Invention Technical Problem [8] The present invention is intended to provide a raw papermaking material using a papermaking staple which is capable of smoothly papermaking using an old papermaker's staple which has been discarded in the past, has excellent pulp yield, and can produce high quality papermill.

According to an aspect of the present invention,

A cutting step of cutting the stem having the roots and the sesame leaves removed to a length of 40 to 60 mm;

A peeling step of peeling the crust of the amputated stem;

A step of digesting the peeled stalks using an aqueous alkaline solution to obtain a pulp;

Washing the steamed pulp with water;

A bleaching step of bleaching the washed pulp with an aqueous hydrogen peroxide solution;

Defatting the bleached pulp to obtain a stock solution;

And a step of papermaking and drying the ground liquid to obtain a raw paper sheet.

Particularly, in the peeling step, it is preferable that the crushed stalks are physically struck by applying steam at 100 to 150 ° C to peel the crust.

The digestion step is a step of first digesting the peeled stem with a 20% potassium carbonate aqueous solution at 100 DEG C for 90 minutes, and then secondary-digesting the slurry with a 20% aqueous solution of sodium hydroxide at 100 DEG C for 120 minutes to obtain a pulp .

In addition, the present invention provides a raw paper using the 칡 stalks produced by the method for manufacturing raw paper using the 칡 stem.

The method of manufacturing the raw paper using the 칡 stem of the present invention has the effect of producing a raw paper having a good quality of the papermaking, the excellent yield of the pulp and the excellent quality by using the 칡 stem which has been discarded in the past.

FIG. 1 is a view showing the results of measurement of the Kappa Number for the steamed No1 to No4 pulp. FIG.

Hereinafter, the raw paper and the manufacturing method thereof using the 칡 stalk of the present invention will be described in detail as follows.

The method for producing the raw paper using the 칡 stalk of the present invention comprises a cutting step, a peeling step, a cooking step, a washing step, a bleaching step, a beating step and a papermaking step.

First, the cutting step is a step of cutting a stem cut into a length of 40 to 60 mm from which a root and a leaf are removed. It is recommended that the leaves be used in a state in which the leaves are removed from the collected leaves, and the leaves should be cut in a state where foreign substances are removed by washing.

Particularly, when the cutter is cut to a length of 40 to 60 mm and cut to a length of less than 40 mm, the yield of the pulp is not good and the physical properties such as the paper strength are poor. There is a problem that it is not smoothly performed.

Next, the peeling step is a step for peeling the crust of the truncated trunks. In order to effectively remove the crust of the truncated trunks, steam is applied to the truncated trunks at 100 to 150 ° C It is better to peel the surface of the shell by physically hitting it.

As a method of physically striking, steam is applied at 100 to 150 ° C in a state where the cut staple is put in a rotary drum having a stamper on its inner circumferential surface, and at the same time, the stamper is rotated at high speed to physically cut the staple And striking the stem to peel the outer shell.

The digestion step is a step of digesting the peeled stalks using an aqueous alkali solution to obtain pulp.

Since the peeled stalks have a tough nature, it is preferable to perform the steaming in two steps so as to improve the pulp yield and facilitate the pilling.

Specifically, the peeled stalks are firstly digested with a 20% potassium carbonate aqueous solution at 100 DEG C for 90 minutes and then secondary-digested with a 20% sodium hydroxide aqueous solution at 100 DEG C for 120 minutes to obtain pulp.

When the peeled stalks were grown in two stages using an aqueous solution of potassium carbonate and an aqueous solution of sodium hydroxide, the Kappa No. was found to be as low as 5.7 and the digestion rate of lectin and lignin was excellent. Also, There is an advantage that the sodium aqueous solution can be shortened by 30% or more as compared with the case of using the sodium aqueous solution alone.

Next, the steamed pulp is washed with water to remove foreign matters, and the washed pulp is bleached with an aqueous hydrogen peroxide solution to improve whiteness.

Particularly, in the bleaching step, primary bleaching is preferably performed using a 3% aqueous solution of Ca (OCl) 2 to obtain a whiteness of 75 or more without damaging the pulp, and secondary bleaching is preferably performed using an aqueous hydrogen peroxide solution.

Next, bleached pulp is defatted and grassed by a general method to prepare a raw paper.

The raw paper thus produced can be used for various purposes such as recording paper, interior paper, and print paper.

Hereinafter, a method of producing a raw paper using the present invention will be described in detail with reference to the following examples, but the scope of the present invention is not limited to the following examples.

[Example]

Leaves were removed from the stem collected from Iksan, Jeonbuk, washed with water and dried naturally. The water content was 35.1087%. The dried stalks were cut to a length of about 50 mm using a cutter. The crust was removed by using a peeling device which had been cut separately. The peeling device is provided with a rotary drum provided with an impact protrusion on an inner peripheral surface thereof, and is configured to be able to supply a steam line into the rotary drum. The cut stalks were put into the rotary drum of the peeling device, and the rotary drum was rotated for 30 minutes while supplying steam at 100 ° C to peel the outer surface of the stalks.

The peeled stalks were grown under the following conditions.

Condition of steaming No 1 K ₂ CO ₃ 20%, 100 캜, 300 min No 2  NaOH 20%, 100 캜, 300 min No 3  NaOH 30%, 100 캜, 300 min No 4 1) K ₂ CO ₃ 20%, 100 ° C., 90 minutes, 2) NaOH 20%, 100 ° C., 120 minutes

The lignin content was measured for the thus-pulped No1 to No4 pulp, and the measurement method was indirectly evaluated by measuring the kappa number by the method of "Kappa Number of Pulp" of TAPPI T 236, Is shown in Fig.

As shown in Fig. 1, in the case of the pulp of No. 1 to No. 3, kappa was measured to be 7.5 to 7.7, but the lignin value of the pulp of No. 4 was measured to be 5.7, and the lignin value was evaluated to be very low.

Particularly, in the case of the No. 4 pulp, the steaming time was 210 minutes, which was shortened by about 30% as compared with the No. 1 to No. 3 pulp.

The yields of No. 1, No. 2, and No. 4 were 65.35%, 67.44%, 54.84%, and 70.7%, respectively, and the No 4 pulp yielded the highest yield Respectively.

The No. 4 pulp was washed with water and then bleached. The bleaching was first bleached at 60 ° C for 30 minutes using a 3% aqueous solution of Ca (OCl) ₂ (Liquid 1:10), and then washed with H ₂ O ₂ aqueous solution (Liquid 1:19) Bleached.

The bleached pulp was dissociated and kneaded using a knife bitter, followed by papermaking and drying with a mortar to prepare a base paper having a basis weight of 40 g / m ² . The whiteness of the prepared paper was 75% as a result of the whiteness test (ISO whiteness) by the diffusion illumination method.

Claims (5)

A cutting step of cutting the stem having the roots and the sesame leaves removed to a length of 40 to 60 mm;
A peeling step of physically hitting the cut stalks in a state of applying steam at 100 to 150 ° C to peel the crust;
The depilated stalks are firstly digested with a 20% potassium carbonate aqueous solution at 100 DEG C for 90 minutes and then secondarily digested with a 20% aqueous sodium hydroxide solution at 100 DEG C for 120 minutes to obtain a pulp;
Washing the steamed pulp with water;
A bleaching step of bleaching the washed pulp with an aqueous hydrogen peroxide solution;
Defatting the bleached pulp to obtain a stock solution;
And a step of papermaking and drying the stock solution to obtain a raw paper sheet.
The method according to claim 1,
Wherein the bleaching step comprises primary bleaching the washed pulp using a 3% aqueous solution of Ca (OCl) 2, and performing secondary bleaching using a 5% aqueous hydrogen peroxide solution. A method for manufacturing a raw paper using the same.
A raw paper made by using the method according to claim 1 or 2. delete delete

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