KR20220139659A - Manufacturing method of functional korean paper comprising polyurethane resin and the products thereof - Google Patents

Manufacturing method of functional korean paper comprising polyurethane resin and the products thereof Download PDF

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KR20220139659A
KR20220139659A KR1020210045891A KR20210045891A KR20220139659A KR 20220139659 A KR20220139659 A KR 20220139659A KR 1020210045891 A KR1020210045891 A KR 1020210045891A KR 20210045891 A KR20210045891 A KR 20210045891A KR 20220139659 A KR20220139659 A KR 20220139659A
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korean paper
traditional korean
polyurethane resin
paper material
pulp
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KR1020210045891A
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Korean (ko)
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유철호
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유철호
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/54—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
    • D21H17/57—Polyureas; Polyurethanes

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Paper (AREA)

Abstract

The present invention provides a method for producing functional traditional Korean paper mixed with a polyurethane resin and traditional Korean paper produced thereby. The method comprises the steps of: preparing traditional Korean paper pulp; preparing a primary traditional Korean paper material by mixing the traditional Korean paper pulp with a polyurethane resin; mixing the primary traditional Korean paper material to make a secondary traditional Korean paper material; molding the secondary traditional Korean paper material by continuously injecting the secondary traditional Korean paper material between rolls vertically rotating at regular intervals; and drying the traditional Korean paper sheet that has been molded while continuously passing between the rolls. Accordingly, the method can significantly improve flexibility as well as strength and tissue density. Moreover, the method can easily produce a composite sheet with enhanced durability and binding force.

Description

폴리우레탄 수지가 배합된 기능성 한지의 제조방법 및 그에 의해 제조되는 한지{Manufacturing method of functional korean paper comprising polyurethane resin and the products thereof}Manufacturing method of functional Korean paper containing polyurethane resin and Korean paper manufactured thereby

본 발명은 기능성 한지의 제조방법 및 그에 의해 제조되는 한지에 관한 것으로서, 더욱 구체적으로는 한지 펄프와 폴리우레탄 수지가 배합된 재료를 이용하여 한지를 제조하는 구성을 제안하여, 한지 제조 과정을 대폭 간소화시킬 수 있음은 물론 한지 자체의 강도 및 조직 치밀도, 유연성을 현저히 증진시킬 수 있음은 물론, 내구성 및 결합력이 증진된 복합시트를 매우 용이하게 제작할 수 있는 폴리우레탄 수지가 배합된 기능성 한지의 제조방법 및 그에 의해 제조되는 한지에 관한 것이다.The present invention relates to a method for manufacturing functional Korean paper and Korean paper produced by the method, and more specifically, by proposing a configuration for manufacturing Korean paper using a material in which Korean paper pulp and polyurethane resin are mixed, greatly simplifying the Korean paper manufacturing process A method for producing functional Korean paper blended with a polyurethane resin that can not only significantly improve the strength, tissue density, and flexibility of Korean paper itself, but also can very easily produce a composite sheet with enhanced durability and bonding strength and Korean paper produced thereby.

한지는 닥나무 등의 껍질을 원료로 하여 제조된 친환경적인 종이로서, 질감은 물론 통기성 및 보온성 등에서 탁월한 성능을 가지고 있다. 게다가, 한지가 가지는 특유의 무늬는 그 디자인적 특성이 뛰어나 신발이나 지갑, 또는 의류나 가방 등과 같이 미감이 중시되는 특정 종류의 제품 제조에 매우 매력적인 소재로 취급받고 있다.Hanji is an eco-friendly paper manufactured using the bark of mulberry trees as a raw material. It has excellent performance in texture as well as breathability and heat retention. In addition, the unique pattern of Korean paper has excellent design characteristics and is treated as a very attractive material for the manufacture of certain types of products where aesthetics are important, such as shoes, wallets, or clothes or bags.

하지만, 한지는 여러 우수한 성능과 수려한 미감에도 불구하고, 인열 강도 및 인장 강도가 너무 낮을 뿐 아니라, 수분에 취약하여 장시간 습기에 노출되는 경우 찢어지거나 틀어지는 등 변형이 발생하는 문제가 있었다. 더욱이, 한지의 조직 자체가 다층 구조를 이루고 있어 분리되거나 박리되는 현상이 발생하여 다양한 제품에 직접 적용하는데는 일정한 한계가 있었다.However, despite the excellent performance and beautiful aesthetics, Korean paper has a problem in that the tear strength and tensile strength are too low, and it is also vulnerable to moisture and thus deforms such as torn or warped when exposed to moisture for a long time. Moreover, since the structure of Korean paper itself has a multi-layered structure, separation or peeling occurs, which limits its direct application to various products.

이를 위해, 한지의 일면부위에 폴리우레탄 수지를 도포하거나 함침시켜 한지 자체의 강도를 보강하여 다양한 제품에 적용하거나, 또는 한지에 접착층을 형성한 다음 원단 등을 결합시켜 제품화하는 방식이 제안되고 있다. 그런데, 이들 모두는 기본적으로 그 제조 과정이 복잡하며, 수지나 접착층 등이 한지 조직에 깊숙이 침투하지 못하는 구성이라는 점에서, 박리 등과 같이 제품 적용시 나타나는 종래의 문제를 근원적으로 해결하지 못하고 있다.For this purpose, a method of applying or impregnating one side of Korean paper with a polyurethane resin to reinforce the strength of Korean paper and applying it to various products, or forming an adhesive layer on Korean paper and then bonding fabrics, etc. has been proposed. However, in all of these, the manufacturing process is basically complicated, and in that the resin or adhesive layer does not penetrate deeply into the Korean paper tissue, conventional problems such as peeling are not fundamentally solved when applying the product.

대한민국 등록특허 제1053083호Republic of Korea Patent No. 1053083

본 발명은 이러한 종래 기술의 문제점을 개선하기 위해 제안된 것으로서, 본 발명의 목적은 별도의 추가 공정 없이도 그 자체로서 뛰어난 강도 및 유연성을 가지고 있을 뿐 아니라 다양한 제품으로의 적용이 용이한 기능성 한지의 제조방법 및 그에 의해 제조되는 기능성 한지를 제공함에 있다.The present invention has been proposed to improve the problems of the prior art, and an object of the present invention is to produce functional Korean paper that has excellent strength and flexibility as well as easy application to various products without a separate additional process. An object of the present invention is to provide a method and functional Korean paper prepared by the method.

본 발명은 이러한 목적을 달성하기 위하여, 한지 펄프를 준비하는 단계; 한지 펄프와 폴리우레탄 수지를 배합하여 제1차 한지재료를 만드는 단계; 제1차 한지재료를 믹싱하여 제2차 한지재료를 만드는 단계; 상하로 일정간격을 두고 회전하는 롤 사이로 제2차 한지재료를 연속하여 투입하여 성형하는 단계; 롤 사이를 연속하여 통과하며 성형된 한지시트를 건조시키는 단계;를 포함하여 이루어지는 기술적 특징이 있다.The present invention, in order to achieve this object, the steps of preparing Korean paper pulp; making a first Korean paper material by mixing Korean paper pulp and polyurethane resin; mixing the first Korean paper material to make a second Korean paper material; forming a second Korean paper material by continuously inserting it between the rolls rotating at regular intervals up and down; There is a technical feature comprising; drying the molded Korean paper sheet while continuously passing between the rolls.

본 발명의 다른 기술적 특징은 상기 과정에 의해 제조되는 폴리우레탄 수지가 배합된 기능성 한지를 제공함에 있다.Another technical feature of the present invention is to provide a functional Korean paper blended with a polyurethane resin produced by the above process.

본 발명은 한지 펄프에 폴리우레탄 수지를 배합하여 믹싱한 다음 성형 및 건조 과정을 거쳐 한지를 제조하는 방법을 제안함으로써, 한지 제조 과정을 대폭 간소화시킬 수 있으며, 한지 자체의 강도 및 조직 치밀도, 그리고 유연성을 현저히 증진시킬 수 있음은 물론 내구성 및 결합력이 증진된 복합시트를 매우 용이하게 제작할 수 있도록 해준다. The present invention proposes a method for manufacturing Korean paper by mixing and mixing a polyurethane resin with Korean paper pulp, followed by molding and drying, thereby greatly simplifying the manufacturing process of Korean paper, strength and tissue density of Korean paper itself, and It is possible to significantly improve flexibility, as well as make it very easy to manufacture a composite sheet with improved durability and bonding strength.

본 발명에 따른 바람직한 실시예를 첨부된 도면을 참조하여 상세하게 살펴보면 다음과 같은데, 본 발명의 실시예를 상술함에 있어 본 발명의 기술적 특징과 직접적인 관련성이 없거나, 또는 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자에게 자명한 사항에 대해서는 그 상세한 설명을 생략하기로 한다. A preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings as follows. In the description of the embodiments of the present invention, there is no direct relation to the technical features of the present invention, or it is common in the technical field to which the present invention pertains. For matters that are obvious to those with the knowledge of

본 발명은 폴리우레탄 수지가 배합된 기능성 한지의 제조방법 및 그에 의해 제조된 기능성 한지에 대한 것으로, 한지 펄프를 준비하는 단계, 제1, 2차 한지재료를 만드는 단계, 성형단계, 건조단계를 포함하여 이루어지는 특징이 있다. 이하 이들 각 단계를 구체적으로 살펴본다.The present invention relates to a method for manufacturing functional Korean paper blended with a polyurethane resin and functional Korean paper manufactured by the method, comprising the steps of preparing Korean paper pulp, making the first and second Korean paper materials, molding, and drying It is characterized by Hereinafter, each of these steps will be described in detail.

먼저, 한지 펄프를 준비한다. 한지 펄프는 닥나무 등을 일정크기로 절단한 다음, 증숙 및 분쇄 등의 과정을 거쳐 얻을 수 있다. 이때, 한지 펄프는 고상의 분말 뿐 아니라 물이 함유된 액상의 펄프액으로 이루어질 수도 있다.First, prepare Korean paper pulp. Hanji pulp can be obtained by cutting mulberry trees to a certain size, then steaming and pulverizing them. In this case, the Korean paper pulp may be composed of not only solid powder but also liquid pulp containing water.

한지 펄프가 준비되면, 이를 폴리우레탄 수지와 배합하여 제1차 한지재료를 만든다. 배합되는 폴리우레탄 수지는 액상으로 이루어지는 것이 바람직하며, 유성수지 또는 수성수지 중 어느 하나로 이루어질 수 있다.When the Korean paper pulp is prepared, it is mixed with a polyurethane resin to make the first Korean paper material. The polyurethane resin to be blended is preferably made of a liquid, and may be made of any one of an oil-based resin or a water-based resin.

한지 펄프와 배합되는 폴리우레탄 수지는 한지 펄프 사이에 침투하여 한지 펄프를 일체화시키는 수단으로, 종래 한지에 있어 펄프액을 이루는 닥풀을 대체한다. 본 발명에 따라 한지 펄프에 폴리우레탄 수지가 배합되면, 한지 펄프 사이의 결합력은 현저히 증대되며 보다 치밀한 조직 구조를 가질 수 있으며, 나아가 수지의 특성으로 인해 보다 유연하면서도 증진된 강도를 가지게 된다.Polyurethane resin blended with Korean paper pulp is a means for integrating Korean paper pulp by penetrating between the Korean paper pulps. When the polyurethane resin is blended with the Korean paper pulp according to the present invention, the bonding force between the Korean paper pulps is remarkably increased and it can have a more dense tissue structure, and furthermore, it has more flexibility and improved strength due to the characteristics of the resin.

한지 펄프와 폴리우레탄 수지가 배합되어 제1차 한지재료가 만들어지면, 이를 믹싱하여 제2차 한지재료를 만든다. 믹싱 과정은 믹서기로 이루어질 수 있으며, 이럴 경우 한지 펄프는 매우 작은 입자로 분쇄되면서 폴리우레탄 수지와 완전히 혼합되어 페이스트화된 상태를 이룬다.When the first Korean paper material is made by mixing Korean paper pulp and polyurethane resin, it is mixed to make the second Korean paper material. The mixing process can be done with a mixer, and in this case, the Korean paper pulp is pulverized into very small particles and completely mixed with the polyurethane resin to form a paste state.

페이스트화된 상태의 제2차 한지재료가 만들어지면, 제2차 한지재료를 상호 대향하는 롤 사이로 연속 투입한다. 롤 사이에는 일정간격이 형성되며, 제2차 한지재료가 롤 사이 간격으로 투입되면, 롤 사이의 간격에 의해 일정두께의 한지시트가 만들어진다. 롤 사이의 간격은 임의 조절이 가능하다.When the secondary Korean paper material in a pasted state is made, the secondary Korean paper material is continuously fed between the rolls facing each other. A certain interval is formed between the rolls, and when the second Korean paper material is input at the interval between the rolls, a Korean paper sheet of a certain thickness is made by the interval between the rolls. The gap between the rolls can be arbitrarily adjusted.

종래 한지를 제조하는 경우에는 펄프액을 연속하는 컨베이어 상면으로 분사하고 펄프액에 함유되어 있는 수분을 제거하는 공정이 이어지는데, 본 발명은 폴리우레탄 수지가 배합된 제2차 한지재료를 이용하기 때문에 이러한 과정을 생략할 수 있다. 다만, 제1차 한지재료에 배합되는 한지 펄프가 물을 포함하는 액상으로 이루어진다면 수분을 제거하는 공정이 부가될 수도 있을 것이다.In the case of manufacturing Korean paper in the prior art, the process of spraying the pulp liquid to the top surface of a continuous conveyor and removing the moisture contained in the pulp liquid is followed. The process can be omitted. However, if the Korean paper pulp mixed with the first Korean paper material is made of a liquid containing water, a process of removing moisture may be added.

회전하는 롤 사이를 통과하며, 롤 사이의 간격에 따라 일정두께로 성형된 한지시트가 만들어지면, 열을 가하여 건조시킨다. 일정두께로 성형된 한지시트에 열을 가하면, 페이스트화된 한지시트에 함유되어 있는 수분이나 용제 등이 증발되며 한지 펄프는 폴리우레탄 수지와 일체화된다.It passes between the rotating rolls, and when a Korean paper sheet molded to a certain thickness according to the gap between the rolls is made, it is dried by applying heat. When heat is applied to the Korean paper sheet molded to a certain thickness, moisture or solvent contained in the pasted Korean paper sheet is evaporated, and the Korean paper pulp is integrated with the polyurethane resin.

한지시트의 건조는 통상적인 열풍 건조기나 건조 챔버를 사용하여 이루어질 수 있으며, 건조는 80℃ ~ 90℃ 범위 내에서 이루어질 수 있다. 다만, 이러한 건조온도는 수지의 종류, 수지와 수분이나 용제의 함량에 따라 달라질 수 있음은 물론이다.Drying of the Korean paper sheet may be accomplished using a conventional hot air dryer or drying chamber, and drying may be performed within the range of 80°C to 90°C. However, it goes without saying that the drying temperature may vary depending on the type of resin and the content of the resin and moisture or solvent.

이러한 과정을 거쳐 한지를 만들게 되면, 한지의 내부에 위치하는 한지 펄프가 폴리우레탄 수지에 의해 매우 견고하게 일체화된다. 이에 따라, 한지 자체의 강도가 매우 높아져 한지 표면 일부가 한지 조직으로부터 박리되는 현상을 원천적으로 방지할 수 있을 뿐 아니라 조직이 치밀해져 습기에 의해 영향을 거의 받지 않는다. When Korean paper is made through this process, the Korean paper pulp located inside the Korean paper is very firmly integrated by the polyurethane resin. Accordingly, the strength of the Korean paper itself is very high, so that it is possible to fundamentally prevent a part of the surface of the Korean paper from being peeled off from the Korean paper tissue, and the tissue is dense, so it is hardly affected by moisture.

또한, 한지가 접목된 복합시트를 이용하여 가방이나 신발 등과 같은 응용 제품을 제작함에 있어, 한지에 배합되어 있는 수지와 유사한 특성을 가지는 접착재료를 사용하여 복합시트를 제작하게 되면 종래 복합시트가 가지는 근원적인 문제점을 깔끔하게 해결하는 것이 가능하다.In addition, in manufacturing application products such as bags or shoes using the composite sheet grafted with Korean paper, when the composite sheet is manufactured using an adhesive material having characteristics similar to the resin mixed with Korean paper, the conventional composite sheet has It is possible to neatly solve the root problem.

상기에서는 본 발명의 바람직한 실시예들에 한정하여 설명하였으나 이는 단지 예시일 뿐이며, 본 발명은 이에 한정되지 않고 여러 다양한 방법으로 변경되어 실시될 수 있으며, 나아가 개시된 기술적 사상에 기초하여 별도의 기술적 특징이 부가되어 실시될 수 있음은 자명하다 할 것이다.In the above description, limited to preferred embodiments of the present invention, this is only an example, the present invention is not limited thereto and can be changed and implemented in various ways, and further, separate technical features are provided based on the disclosed technical idea. It will be obvious that it can be implemented in addition.

Claims (2)

한지 펄프를 준비하는 단계;
한지 펄프와 폴리우레탄 수지를 배합하여 제1차 한지재료를 만드는 단계;
제1차 한지재료를 믹싱하여 제2차 한지재료를 만드는 단계;
상하로 일정간격을 두고 회전하는 롤 사이로 제2차 한지재료를 연속하여 투입하여 성형하는 단계;
롤 사이를 연속하여 통과하며 성형된 한지시트를 건조시키는 단계;를
포함하는 폴리우레탄 수지가 배합된 기능성 한지의 제조방법.preparing Korean paper pulp;
making a first Korean paper material by mixing Korean paper pulp and polyurethane resin;
mixing the first Korean paper material to make a second Korean paper material;
forming a second Korean paper material by continuously inserting it between the rolls rotating at regular intervals up and down;
Drying the molded Korean paper sheet while continuously passing between the rolls;
A method for producing functional Korean paper containing a polyurethane resin blended with it. 제1항에 의해 제조되는 폴리우레탄 수지가 배합된 기능성 한지.A functional Korean paper blended with a polyurethane resin manufactured according to claim 1.
KR1020210045891A 2021-04-08 2021-04-08 Manufacturing method of functional korean paper comprising polyurethane resin and the products thereof KR20220139659A (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101053083B1 (en) 2009-09-09 2011-08-01 박청기 Functional Hanji and its Continuous Production Process

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101053083B1 (en) 2009-09-09 2011-08-01 박청기 Functional Hanji and its Continuous Production Process

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