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KR-20260063646-A - Carbon fiber bal(sheet forming screen) for Hanji papermaking and manufacturing method thereof

KR20260063646AKR 20260063646 AKR20260063646 AKR 20260063646AKR-20260063646-A

Abstract

The present invention relates to a carbon fiber mat for Hanji papermaking. The carbon fiber according to the present invention has excellent stability and durability due to low contamination and deformation of the material, and is used as a substitute material for existing bamboo mats for Hanji papermaking. It allows for easy visual assessment of whether the mulberry fibers are uniformly distributed during Hanji papermaking, thereby systematizing Hanji that was previously made based solely on the experience of the papermaker. Furthermore, by producing a carbon fiber mat that is semi-permanently usable and has minimal damage even when exposed to water for a long time, it can be used semi-permanently as a replacement for the consumable Hanji papermaking mats that were at risk of being discontinued.

Inventors

  • 최태호
  • 김춘호
  • 이상현
  • 김진원

Assignees

  • 충북대학교 산학협력단

Dates

Publication Date
20260507
Application Date
20241030

Claims (9)

  1. Carbon fiber foot for Hanji papermaking, characterized by being made using carbon fiber.
  2. In paragraph 1, A carbon fiber foot for Hanji papermaking, characterized in that the diameter of the carbon fiber is 0.5 to 1.0 mm.
  3. In paragraph 1, A carbon fiber foot for Hanji papermaking, characterized in that the above carbon fiber foot can be used for both single-foot and double-foot papermaking when producing Hanji.
  4. In paragraph 2, A carbon fiber foot for Hanji papermaking, characterized in that the carbon fiber foot used for the above-mentioned single-foot weaving has a length of 900 mm to 1400 mm, a width of 550 mm to 900 mm, and a thickness of 0.5 mm to 1.0 mm.
  5. In paragraph 2, A carbon fiber foot for Hanji paper, characterized in that the carbon fiber foot used in the above-mentioned double-footing process has a length of 550 mm to 1320 mm, a width of 900 mm to 1920 mm, and a thickness of 0.5 mm to 1.0 mm.
  6. In paragraph 1, A carbon fiber foot for Hanji papermaking, characterized in that the yarn spacing of the above Hanji foot is 1.4 cm to 1.6 cm.
  7. In paragraph 1, A carbon fiber foot for Hanji papermaking, characterized in that the number of carbon fiber feet is 17 to 45.
  8. In paragraph 1, A carbon fiber foot for Hanji papermaking, characterized in that the finishing fabric of the carbon fiber foot is polyester, silk, or cotton.
  9. As a method for manufacturing carbon fiber feet for Hanji paper, 1) A step of securing carbon fibers to thread holders on a frame for weaving Hanji paper and tying both ends of the carbon fibers to the bamboo bells; 2) The stage of weaving the mat after preparing both the warp and weft threads; 3) A step in which, when step 2) is more than halfway complete, the ends of the warp threads are tied one by one to form knots, and then all the braided threads are cut using scissors; 4) Turning in the opposite direction and placing the initially woven part back onto the frame upward to center the yarn; 5) A stage where both sides intersect and interweave with the center as the center; 6) Step of cutting off and trimming the edges; and 7) A step of tying the rim sections on both sides and covering them with cloth to finish; comprising a method for making a carbon fiber foot for Hanji paper.

Description

Carbon fiber bal (sheet forming screen) for Hanji papermaking and manufacturing method thereof The present invention relates to a carbon fiber foot for Hanji papermaking and a method for producing the same. Carbon fiber, also known as graphite fiber, carbon graphite, or CF, is a very fine fiber with a thickness of 0.005 to 0.01 mm, primarily composed of carbon. The carbon atoms that make up the carbon fiber are attached along the length of the fiber in the form of hexagonal ring crystals, and this molecular arrangement structure gives it strong physical properties. A single strand of thread is made by twisting thousands of strands of carbon fiber together. Carbon fiber can be woven into various patterns and is also used in combination with materials such as plastics to create lightweight yet strong composite materials, such as carbon fiber-reinforced polymers. Because the density of carbon fiber is much lower than that of iron, it is suitable for use when lightweighting is a critical requirement. Due to its characteristics such as high tensile strength, light weight, and low coefficient of thermal expansion, carbon fiber is widely used as a material in the aerospace, civil engineering and construction, military, automotive, and various sports fields. On the other hand, it has disadvantages, such as being relatively more expensive than similar materials like fiber, glass, or plastic, and being very strong against tensile or bending forces but weak against compressive forces or sudden impacts. Paper is one of humanity's four greatest inventions, and among them, Hanji does not rot even after a thousand years. Recently, Hanji's preservation capabilities have been drawing attention for the restoration of cultural heritage around the world. There is a hidden key contributor to the production of such exceptionally durable Hanji: the 'Hanji mat,' a core tool used in the paper-making process. No matter how good the materials or how much care is put into the process, it is impossible to produce high-quality Hanji with a smooth and even surface using an uneven Hanji mat. Traditional Hanji blinds are made by splitting bamboo into thin, round strands called "daechok" and weaving them together with braided threads (such as horsehair, silk, nylon, or PE). Since the entire production process must be done by hand, it is labor-intensive and limits productivity. In particular, the process of preparing the bamboo requires great care. The outer skin of the bamboo is peeled off and boiled in saltwater. This is done to remove the sugars naturally contained within the bamboo. The thoroughly boiled bamboo is dried in the sun for about 3 to 4 days and stacked in an airtight manner. The processed bamboo is then cut into strips of 0.7 to 0.8 mm and woven into the blinds. Although Hanji blinds are sometimes produced by machine, it is difficult to create one as intricate and smooth as those made by hand. It is known that the production of "daebal" (bamboo blinds) ordered from Hanji factories typically takes one to two months. Currently, there is only one master craftsman of Hanji blind making remaining in the country, and the tradition is facing the risk of being lost. As a result, there is a need to produce and research semi-permanent Hanji foot coverings instead of the existing consumable ones. As for prior art related to Hanji blinds, an online blog ( https://m.blog.naver.com/daryeon12/80191163013 ) mentions polystyrene mesh, stainless steel mesh, aluminum mesh, cloth, mesh, wire, or plastic as materials that can be used for traditional Hanji blinds in Hanji manufacturing; the Jeonju Millennium Hanji Museum website ( http://jmhm.kr/main/?menu=75 ) discloses that horsehair or silk threads can be replaced with fishing line in the composition of traditional Hanji blinds; and the Korea Occupational Safety and Health Agency's Technical Guidelines on the Safe Use of Paper Machinery (November 2013) mentions that synthetic fibers can also be used as materials for wire mesh used in making paper or pulp. However, there are no examples of carbon fiber being applied to the production of Hanji blinds. The inventors confirmed that conventional bamboo Hanji mats are made of a material that absorbs water due to their characteristics, and when exposed to water for a long time, they deform and their weight increases, which leads to a decrease in the balanced distribution of mulberry fibers accumulated on the Hanji mat during Hanji papermaking and low strength, resulting in damage to the bamboo mat and, consequently, the mulberry fibers falling off and becoming entangled in many cases. Accordingly, carbon fiber, which possesses excellent heat resistance, water resistance, and impact resistance, is resistant to chemicals and highly resistant to pests, and has high density and strength due to the characteristics of the raw material, was used as a substitute material for conventional bamboo Hanji mats. This prevents contamination and deformation of the ma