KR101019329B1 - Korean paper comprising red algae fiber - Google Patents

Abstract

The present invention relates to Korean paper comprising red algae fibers. Hanji including red algae fiber according to the present invention has excellent opacity and smoothness, and is suitable as a book paper, a dictionary paper, and a printing paper for preservation. You can widen.

Description

Korean paper comprising red algae fiber

The present invention relates to Korean paper comprising red algae fibers.

Hanji is a paper unique to Korea that is made from bast fibers such as mulberry, cedar, and skin. Bast fiber has a fiber length (10mm) that is much longer than that of conifers used as chemical pulp (3mm) or that of hardwoods (1mm). The castle is also excellent and can make tough paper.

Hanji has a softer texture, more flexible folding, toughness and ink staining than ordinary paper, it can express all colors, it is tough in water with its fast absorption, and it has excellent sound insulation and cold weather and warmth according to the season. Even though the characteristics of the paper does not change. In particular, Hanji is known as a paper that lasts for millennia, and in the case of the Mugujeong Clown, it was known to have been made in the 8th century, and it is still recorded as a hanji that still has cultural values.

Traditional Korean paper is a technique of making Korean paper in the old-fashioned way.

First, raw materials of Korean paper, such as paper mulberry, trichamber and anpi, are harvested in winter. Harvested Hanji raw materials are processed at random. Dakmuji process is the process of steaming the harvested hanji raw material using steam, to peel off the skin containing the bast fiber from the raw material. Peel off the raw materials that have been processed. Peeled skin is called black skin. Wash the skin completely with clear water again, and then remove the black parts of the epidermis with a knife. Bark skin, which has been completely removed from black parts, dust and impurities, is called white skin.

Treat the white skin mercifully. Baekpi can be treated by various medicines. For natural medicines, it is possible to use meat made by burning lye with straw, buckwheat, cotton, soybeans, peppers, and caustic soda as a general chemical. have. Self-treatment refers to the process of boiling the white skin sufficiently at about 100 degrees Celsius by meat or caustic soda. Mercy-treated white skin using caustic soda, a general chemical instead of natural meat, is cleaner and easier to process, but it is not seen as a raw material of traditional paper.

Once processed, Hanji raw materials are washed to remove all soluble impurities contained in Hanji raw materials.

The bleaching process is performed on the raw material from which the soluble impurities have been removed. The bleaching process includes sunlight bleaching using sunlight and chemical bleaching using sodium hypochlorite or chlorine dioxide. When chemical bleaching is carried out, the cellulose molecular weight of the raw material of Hanji is significantly reduced, which makes it easy to lose the properties of Hanji, which has long shelf life.

After the bleaching process, the tiling process is performed to remove impurities that have not been sufficiently bleached to complete the treatment of Hanji raw fiber.

A beating step is performed on the Hanji raw material fibers. The confession process is a process of squeezing Hanji raw material fibers with a stick called Dak-Bak, which is an essential and traditional process for increasing the strength of Hanji and improving the uniformity of Hanji. Recently, a machine called a calviter is used to shorten the length of the Hanji raw material fibers and to increase the uniformity.

Put the Hanji raw material fiber in the paper container after the beating process is finished, and the Hanji is floated with a foot made of bamboo flesh. At this time, the Hanji raw material fiber is mixed with a natural additive called 'dakweed' to make Hanji. It is obtained in the form of juice from the root of a plant called Hwang Chok-gyu, and when used together with raw paper fibers, it improves the strength and uniformity of the paper. There are two ways to float Hanji, unicycle and twine, and unicycle is known as the traditional method of making Korean paper. Uni-knit can make Hanji with stronger and more uniform than twin-knit. Instead of the camphor, PAM (polyacrylamide) or PEO (polyethyleneoxide) may be used. After removing the water of Hanji made of unicycle or twine, dry it on a hot iron plate or dry it on a wooden board with sunlight to complete Hanji.

In the case of manufacturing Hanji using Doc-fiber, etc. by the traditional treatment process described above, it is possible to manufacture Hanji which has excellent strength properties such as tensile strength, rupture strength, and heat resistance, and which can be preserved for more than 1000 years. Can be. Such Hanji has good affinity with natural phenomena such as light, wind, and moisture, so it is well-winded and absorbs moisture. The use of Korean paper is divided according to its quality and title.The paper is used as a window paper on the door, a copy paper used as a seal of genealogy, a Buddhist scripture, and an ancient book, a paper used as a monarch or a flower, a New Year's card or a wedding invitation, etc. It is used in various ways such as Taiji.

In recent years, traditional Korean paper has been manufactured, including waste paper and other inexpensive materials. For example, various Korean paper using citrus peel, rape powder and hemp has been developed.

However, the traditional method of manufacturing Hanji as described above is very excellent in the preservation of Hanji, but has a disadvantage in that the manufacturing process is difficult and labor costs are high.

In addition, Korean paper has a low basis weight and very low opacity. In order to increase the opacity of such paper, conventionally, it has been used by thickening the paper or adding fillers such as calcium carbonate, clay, talc and titanium dioxide. However, if the paper is made thick, the opacity can be increased, but the price becomes very high.When using the filler, it is very difficult to hold the filler in the low basis weight hanji, and even if it is held, the filler is released by light contact. It may cause pollution, and the strength of Hanji is greatly impaired, so it is very difficult to obtain an improvement effect.

In addition, although Korean paper is suitable for calligraphy using a brush, there is a problem of low smoothness for use for mass printing. Conventionally, in order to increase the smoothness of Hanji, a sheet of paper coated with several sheets of paper and rolled down evenly with an injector was performed so that the tissue of Hanji was dense and the surface was polished. However, since a large amount of technology and manpower must be put into the doping process, it is difficult to realize economically.

Therefore, there is a need for a study to improve the opacity and smoothness of Hanji.

Red algae, on the other hand, contain red and purple seaweeds in addition to chlorophyll, which are red or purple, and inhabit relatively deeper water than other algae, are relatively small in size, and have a variety of types of about 4000 species. Red algae have a wider range of habitat than green algae and brown algae, and grow from shallow depths to deep water rays. Red algae contain a large number of fibres, called muscle muscles, which are several microns in diameter and have almost constant size in all red algae. In addition, red algae fibers have excellent whiteness and opacity and excellent binding ability between red algae fibers. The crystallinity of red algae fibers is similar to cellulose fibers, in particular the thermal properties of bleached red algae fibers are superior to cellulose fibers. The red algae include laver, woodworm, ox radish, buckwheat, braid, thorn radish, silk grass, sackcloth, gambling, noodle sprout, stone starfish, stone and Jinuari. The internal gel extracts of red algae are used as food additives, health supplements, and agar materials.However, red algae fiber is rarely used except as a bio-composite material. There is almost no research and development applied.

The inventors of the present invention, while studying to improve the opacity and smoothness of the hanji, was prepared by mixing the red algae fiber excellent in the opacity with the raw material of the Korean paper, and confirmed that the hanji containing the red algae fiber has excellent opacity and smoothness, The present invention has been completed.

The present invention seeks to provide a Korean paper comprising red algae fibers with improved opacity and smoothness.

The present invention provides hanji comprising red algae fibers with improved opacity and smoothness.

Hereinafter, the present invention will be described in detail.

Hanji according to the invention is characterized in that it comprises 1 to 50% by weight relative to the total weight of the red algae fiber.

Hanji according to the present invention can be produced by recording paper or mechanical Hanji in a conventional manner by mixing the Hanji raw material fiber and red algae fiber through a beating process, a spinning process, a dehydration process and a drying process. In the knitting process, it is preferable to use a foot that is easy to dehydrate, and it is preferable to select and use a high dehydrating foot to control the low dehydration of the red algae fiber. It can be manufactured with paper by using uni-knit or twin-knit, or by using a paper machine.

The Hanji raw material fiber is prepared by the traditional method using bast fibers such as mulberry, cedar, bark and hemp as raw materials. In other words, one kind selected from the group consisting of mulberry, cedar, wood, and hemp is produced through raw paper mulberry process, mercy treatment, washing process, bleaching process and tigogi raw material.

The red algae fiber is prepared and used by the methods described in Korean Patent Publication Nos. 10-754890 and 10-811183. That is, the red algae are immersed in an acidic or alkaline solution for a certain time, washed with water and dehydrated, and the dehydrated red algae are immersed in an extraction solvent for a predetermined time to extract a gel, and the extracted gel is separated and the residue is subjected to several steps. Bleached, and collected and fibrized to obtain red algae fibers. The ISO whiteness of the red algae fibers thus prepared is preferably 50 to 99%, more preferably 80 to 99%. The red algae includes at least one selected from the group consisting of laver, wood starfish, ox radish, buckwheat, braid, thorny radish, silk grass, scabbard, gambling, noodle sprout, stone starfish, stone and jinari. The red algae fiber comprises 1 to 50% by weight, preferably 5 to 30% by weight, based on the total weight of Hanji. If the content of red algae fiber exceeds 50% by weight, it is difficult to say Hanji, and if it is less than 1% by weight, opacity and smoothness are not improved.

In general, the opacity increases as the basis weight increases, but the opacity and smoothness of the Korean paper containing the red algae fiber according to the present invention are high even though the basis weight is lower than that of the red paper. In addition, the hanji comprising the red algae fiber according to the present invention appears to increase the opacity and smoothness as the content of the red algae fiber increases. In addition, the Korean paper comprising the red algae fiber according to the present invention is excellent in opacity and smoothness almost unchanged even after deterioration for 2 weeks, 4 weeks, 6 weeks.

Therefore, Hanji containing red algae fiber according to the present invention is excellent as an opacity and smoothness, suitable for book paper, dictionary paper, printing paper for preservation, can preserve the taste of Hanji as it is excellent as a calligraphy or high-quality drawing paper Its use can be expanded.

Hereinafter, preferred embodiments of the present invention will be described in order to facilitate understanding of the present invention. However, the following examples are provided only for the purpose of easier understanding of the present invention, and the present invention is not limited by the examples.

Example  1-4  : Manufacture of Korean paper containing red algae fiber

Example  One  :

95 parts by weight of Doc fiber was placed in a paper container, and 5 parts by weight of red algae fiber was added thereto to prepare Hanji paper as a recording paper in a conventional manner.

Example  2  :

90 parts by weight of Doc fiber was placed in a paper container, and 10 parts by weight of red algae fiber was added thereto to prepare Hanji paper as a recording paper in a conventional manner.

Example  3  :

80 parts by weight of Doc fiber was placed in a paper container, and 20 parts by weight of red algae fiber was added thereto to prepare Hanji paper as a recording paper in a conventional manner.

Example  4  :

70 parts by weight of Doc fibers were placed in a paper container, and 30 parts by weight of red algae fibers were added thereto to prepare Hanji paper as a recording paper in a conventional manner.

Comparative example  One  : Manufacture of Korean paper which does not contain red algae fiber

Only 100 parts by weight of the Doc fiber was put in a paper container, and Korean paper was prepared as a recording paper by a conventional method.

Comparative example  2  : Manufacture of Korean paper containing wood pulp

90 parts by weight of Doc fibers were placed in a paper container, and 10 parts by weight of pulp mixed with coniferous bleached pulp and hardwood bleached pulp at 50:50 was added to prepare Hanji paper as a conventional paper.

Experimental Example  One  : Measurement of Physical and Optical Properties of Hanji with Red Algae Fibers According to the Present Invention

In order to measure the physical and optical properties of Hanji comprising red algae fibers according to the present invention, the following experiment was performed.

The Hanji prepared in Examples 1 to 4 and Comparative Example 1 were subjected to accelerated degradation treatment for 2 weeks, 4 weeks, and 6 weeks under conditions of 105 ° C RH0%. Physical and optical properties were measured after 24 hours pretreatment in a constant temperature / humidity room adjusted to 23 ± 1 ° C and 50 ± 2% relative humidity according to TAPPI standard T402 om-88 before and after degradation. Humidified specimens were measured for physical properties such as internal resistance (TAPPI T 423 om-89), elongation (tension strength) (TAPPI T 494 om-88), and smoothness (TAPPI T 479 om-99) according to the TAPPI standard. It was. In addition, the moisture-treated specimens were measured for optical properties such as whiteness (TAPPI T 452 om-98) and opacity (TAPPI T 452 om-96) using Technidyne's Color-Touch based on the TAPPI standard.

The physical and optical properties of Hanji containing red algae fibers before deterioration are shown in Table 1, and the physical and optical properties of Hanji including red algae fibers after deterioration for 2 weeks are shown in Table 2 and deterioration for 4 weeks. The physical and optical properties of Korean paper containing red algae fiber are shown in Table 3, and the physical and optical properties of Korean paper containing red algae fiber after deterioration for 6 weeks are shown in Table 4.

TABLE 1

Physical and Optical Properties of Hanji Containing Red Algae Fibers Before Degradation

TABLE 2

Physical and Optical Properties of Hanji Containing Red Algae Fibers After Degradation for Two Weeks

[Table 3]

Physical and Optical Properties of Hanji Containing Red Algae Fibers After Degradation for 4 Weeks

[Table 4]

Physical and Optical Properties of Hanji Containing Red Algae Fibers After Degradation for 6 Weeks

As shown in Table 1, the opacity and smoothness of the Korean paper (Examples 1 to 4) comprising the red algae fiber according to the present invention is the Hanji (Comparative Example 1) that does not contain the red algae fiber (Comparative Example 1) and the hanji (wood pulp) It was significantly higher than Example 2). In general, the opacity increases as the basis weight increases, but the opacity and smoothness of the Korean paper containing the red algae fiber according to the present invention are high even though the basis weight is lower than Comparative Examples 1 and 2.

In addition, as shown in Table 2 to Table 4, even after the deterioration treatment for 2 weeks, 4 weeks, 6 weeks, the opacity and smoothness of the Korean paper comprising the red algae fiber according to the present invention appeared to be excellent almost without change.

As described above, the Hanji comprising the red algae fiber according to the present invention is considered to greatly contribute to the opacity and smoothness by increasing the opacity and smoothness as the content of the red algae fiber increases.

Hanji including red algae fiber according to the present invention has excellent opacity and smoothness, and is suitable as a book paper, a dictionary paper, and a printing paper for preservation. You can widen.

Claims (5)

Korean paper containing 50-99% by weight of Hanji raw material fiber and 1-50% by weight of red algae fiber with improved opacity and smoothness. According to claim 1, wherein the hanji raw fiber is one paper, characterized in that it comprises one species selected from the group consisting of mulberry, cedar mulberry, skin and hemp. delete The method of claim 1, wherein the red algae fiber is extracted from one or more selected from the group consisting of laver, wood starfish, ox radish, buckwheat, braid, thorn radish, silk grass, scabbard, gambling, noodle sprout, stone starfish, stone and Jinuari Hanji characterized by the fact that. The hanji paper of claim 1, wherein the Korean paper is a paper or mechanical paper.