KR101879650B1 - The manufacturing method of a Korean-paper Fiber Having Exellent Tensile Strength - Google Patents
The manufacturing method of a Korean-paper Fiber Having Exellent Tensile Strength Download PDFInfo
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- KR101879650B1 KR101879650B1 KR1020150190130A KR20150190130A KR101879650B1 KR 101879650 B1 KR101879650 B1 KR 101879650B1 KR 1020150190130 A KR1020150190130 A KR 1020150190130A KR 20150190130 A KR20150190130 A KR 20150190130A KR 101879650 B1 KR101879650 B1 KR 101879650B1
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Classifications
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
- D02G3/08—Paper yarns or threads
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/44—Yarns or threads characterised by the purpose for which they are designed
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/44—Yarns or threads characterised by the purpose for which they are designed
- D02G3/449—Yarns or threads with antibacterial properties
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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
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/10—Organic non-cellulose fibres
- D21H13/12—Organic non-cellulose fibres from macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H13/14—Polyalkenes, e.g. polystyrene polyethylene
-
- 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
- D21H17/02—Material of vegetable origin
-
- 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
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- 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
- D21H17/52—Epoxy resins
-
- 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
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/18—Reinforcing agents
-
- 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
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/36—Biocidal agents, e.g. fungicidal, bactericidal, insecticidal agents
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2401/00—Physical properties
- D10B2401/06—Load-responsive characteristics
- D10B2401/063—Load-responsive characteristics high strength
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2401/00—Physical properties
- D10B2401/13—Physical properties anti-allergenic or anti-bacterial
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Paper (AREA)
Abstract
The present invention relates to a method for mixing a fine powder (hwp) of pulverized wood pulp in a pulverized pulverizer with airflow pulverizer (abbreviated as "hwp") so that there is no frictional heat or nutrient destruction in abaca pulp, After forming the material,
A functional sheet having morphological stability and durability is produced by forming a hard film so as not to be torn or broken by being blended with a paper machine with a long-
As described above, the functionalized sheet formed by papermaking is divided by a slitting machine to make single-stranded strands of a predetermined width, twisted with a fiber spinner, thinly stretched to produce a hardened paper having improved tensile strength and tensile strength And more particularly to a method for manufacturing hanji paper for enhancing physical properties of used hanji paper.
Description
The present invention relates to a method for manufacturing hanji paper for enhancing the physical properties of ground paper, and more particularly, to a method for manufacturing a hanji paper pulp, which is a staple-shaped manila hemp pulp having excellent cohesion and water resistance, (Hwp) of pulverized and pulverized wood pulp is mixed to form a mixed material of functional materials,
A functional sheet having morphological stability and durability is produced by forming a hard film so as not to be torn or broken by being blended with a paper machine with a long-
As described above, the functionalized sheet formed by papermaking is divided by a slitting machine to make single-stranded strands of a predetermined width, twisted with a fiber spinner, thinly stretched to produce a hardened paper having improved tensile strength and tensile strength And more particularly to a method for manufacturing hanji paper for enhancing physical properties of used hanji paper.
Recently, as the interest in the environment and health has increased, the final product using natural fibers has also become more sophisticated and sophisticated. As a result, the fibers using Korean paper have a variety of properties such as far infrared ray emission, antibacterial, deodorant, breathable, It has a function and is attracting attention as a new fiber.
Hanji fiber, which is a promising well-being natural fiber in the 21st century, is a traditional Hanji fiber made of duck fiber, which is harmless to human body. It is made of mackerel bark and used as a typical environment-friendly natural fiber material harmless to human body. It is widely used in traditional clothing as well as traditional hanbok, and has been recognized for its eco-friendliness due to its various functions such as loam level far infrared ray emission, antibacterial property, deodorizing performance, sweat-absorbing quick drying property and easy dyeing ability. And the related field is expected to grow rapidly.
However, the above-mentioned Korean paper fibers have antibacterial properties, excellent air permeability, excellent sweat absorbing ability, and are useful for the health of the human body. However, they are weak and easily torn in water,
In order to solve the above-mentioned problems, the applicant of the present invention has filed a patent application entitled " Preparation of Multifunctional Chinese Fibers Containing Leaf Bark and Leaf Extracts ", Korean Intellectual Property Office Publication No. 10-2013-0115676 (published on October 22, 2013) Method ".
However, the above-mentioned prior patent of the present applicant can not overcome limitations of the conventional range of traditional Korean paper use such as mechanical tensile strength and fails to cover the functionality that is lacking in modern consumers who demand new functional Korean paper fiber products, There is a problem in that it can not satisfy all of the application requirements characteristics.
Conventional prior art documents are as follows. All of these prior arts have a limitation in reducing the fineness and enhancing the strength, because the yarn having the low elongation is wrapped around the cotton yarn.
Document 1: Korean Registered Patent Publication No. 10-1336632
(Hanji yarn / synthetic fiber covering company with excellent tensile strength, registered on November 28, 2013)
Document 2: Korean Patent Laid-Open Publication No. 10-2012-0073459
(Composite yarn using branch and method of manufacturing the same, date of publication: July 7, 2012)
The applicant of the present invention has made efforts to solve the problems of the prior art, and as a result,
The present invention, which is superior in mechanical properties such as tensile strength, fracture strength and compressive strength while maintaining the inherent inherent effects of Korean paper compared to the prior art Hanji which has a high tensile strength in the manufacture of Hanji, It was completed.
As described above, there is a technical problem in the production of the functionalized Chinese paper fiber of the prior art,
Which has a higher tensile strength and is more frequent in filament yarns than conventional hanji yarns which have a higher tensile strength than those of conventional hanji yarns, The present invention has been made to solve the technical problem that must be developed.
The present invention has been made in order to further reinforce the functions of the above-described conventional hanji fibers,
A fine powder of wood pulp pulverized and pulverized at a particle size of 500-800 mesh in an air stream mill so that there is no frictional heat or nutrient destruction in 85% (weight ratio) of abaca pulp, which is a stem type manila tribo-pulp having excellent cohesion and water resistance. (weight ratio) of 3% (weight ratio) and 3% (weight ratio) of PEO (polyethylene oxide) as a dispersing agent to the fiber-mixed mixed material mixed with 15% by weight (hwp) Lt; / RTI >
A functional sheet having morphological stability and durability is produced by forming a hard film so as not to be torn or broken by being blended with a paper machine with a long-
As described above, the functional sheet formed by papermaking was divided into a width of 1.8 to 2 mm by a slitter to make a predetermined width of a tape, and then twisted with a fiber twist, and then stretched finely to be strong and smooth, It is an object of the present invention to provide a manufacturing method of Hanji for enhancing the physical properties of Hanji Co.,
The paper sheet for enhancing the physical properties of the papermaking paper of the present invention, formed as described above,
In order to improve the mechanical strength of the Korean paper fiber material and to process the wood powder in the form of fine powder so as to have affinity and affinity with the abaca pulp paper through the structural change, Which is superior in mechanical properties such as tensile strength, breaking strength and compressive strength while maintaining the inherent strength of Korean paper compared to cotton.
Therefore, when the fabric is manufactured using the high-tensile Hanji yarn of the present invention, it is possible to manufacture articles made of Hanji fiber having excellent stretchability, so that the fabric can be made more comfortable when manufactured.
In addition, the present invention relates to a method for manufacturing a hanji paper sheet, which is characterized in that tensile strength, breaking strength, compressive strength And the like, thereby maximizing the advantages of Hanji Co., and minimizing the process inhibition factors such as knitting at the time of knitting, thereby realizing an effect of easy weaving.
In particular, the paper of the present invention has a problem in that the surface of the paper of the present invention is not smooth and the thickness is uneven and the tensile strength and elongation are weak, so that there is a problem of frequent cutting phenomenon at the time of knitting and uneven texture of the fabric. And is excellent in durability, water resistance and morphological stability, and is strong and smooth. Therefore, it is possible to knit effectively because knotting does not occur at the time of knitting, so that it is possible to knit socks, sportswear, waist belt, etc. It will be effective when applied to health and household goods.
In addition, the present invention is an automated papermaking process, which replaces the problem of shipment to each chapter, which is a disadvantage of the conventional papermaking papermill in the past, so that the productivity and the convenience of operation are greatly improved compared to the conventional papermaking.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the configuration of the present invention will be described in detail.
The present invention relates to a method for manufacturing a hanji paper for enhancing the physical properties of paper-making paper,
A fine powder of wood pulp pulverized and pulverized at a particle size of 500-800 mesh in an air stream mill so that there is no frictional heat or nutrient destruction in 85% (weight ratio) of abaca pulp, which is a stem type manila tribo-pulp having excellent cohesion and water resistance. (weight ratio) of 3% (weight ratio) and 3% (weight ratio) of PEO (polyethylene oxide) as a dispersing agent to the fiber-mixed mixed material mixed with 15% by weight (hwp) Lt; / RTI >
A functional sheet having morphological stability and durability is produced by forming a hard film so as not to be torn or broken by being blended with a paper machine with a long-
As described above, the functional sheet formed by papermaking was divided into a width of 1.8 to 2 mm by a slitter to make a predetermined width of a tape, and then twisted with a fiber twist, and then stretched finely to be strong and smooth, It is a manufacturing method of Hanji for strengthening the physical properties of Hanji which uses Hanji.
The Abaca fiber (Manila hemp) is excellent in durability, moisture absorption, absorption and sweat absorbability, and has excellent drape and elasticity, superior water resistance such as erosion and shrinkage in water, ease of mixing with other fibers, biodegradable environmentally friendly material And the like.
Abba pulp can be replaced with duck pulp having excellent antimicrobial effect or mixed pulp of Abaka pulp with duck pulp in the above-mentioned fiber composition. In order to prevent tearing or breakage even though it is porous of fine pore structure, And durability is improved.
In addition, it can be dried with a far-infrared ray dryer that emits radiant heat after grassing. It can dry up the moisture inside the mixed material due to the far-infrared radiant heat. It activates cell tissue and makes the best condition without changing color. It is possible to maximize the antioxidant power by activating the low molecular weight antioxidants present in natural products by irradiation with far infrared ray, and at the same time, it can remove heavy metals and toxic substances by powerful sterilizing and purifying action of far infrared rays.
The thus-formed physical property-strengthening paper of the present invention maintains a firm bond with the abaca fiber by mixing the mechanical properties such as tensile strength, which are insufficient in the conventional hanji fiber, with the hwp of the pulverized wood pulp to the abaca pulp In contrast to the prior art Hanji which has a high tensile strength in the production of Hanji paper and has a tendency to occur frequently due to the processing of wood pulp into a fine powder form so as to have affinity with the abaca pulp paper through the fiber structure change, It has excellent mechanical properties such as tensile strength, breaking strength and compressive strength,
Hard wood pulp (hard wood pulp, Hwp. Hard wood pulp) was well adhered between abaca pulps, and slitting was smooth without slitting when slicing with a sheet of paper. Therefore, As compared with Hanji yarn of the prior art, it has a straight structure of a structure in which the entire constituent material is integrated, but is excellent in durability, water resistance and morphological stability, and is strong and smooth, It was confirmed that the mechanical properties such as strength breaking strength were improved.
Accordingly, the present invention relates to an abaca Hanji sign bar made of an environmentally friendly composite material containing a hanji raw material in place of Hanji which is composed of Hanji dod pulp of a conventional simple function, and has basically a weak and easily tearable defect in water, It is solid and lightweight because it is hard to form and it has hardness, cracks and easy decomposition in water when it is dry.
In the present invention, as the fiber-reinforced raw material to be added to the above-mentioned abaca pulp raw material, the pulverized powder is pulverized into fine coarse pulverulent particles so as to exhibit high strength and multi-
The woody part of wood, which is a pulverulent fibrous material, is finely pulverized and pulverized into ultrafine particles. Therefore, the wood powder in which the cellulose particles of the present invention are finely pulverized has a wider surface area and a larger contact area between particles And the strength of the wood powder is increased. Thus, the wood powder in the state of fine particles removes the space between the materials as much as possible through the tight coupling between the materials and increases the strength by making the three-dimensional structure.
It is a granular wood powder made by pulverizing wood. Wood flour is used in the production of Hanji paper, which can reduce the amount of pulp used. Therefore, it is possible to drastically reduce the production cost of Korean paper fiber. It is possible to reduce dehydration and drying cost, It can prevent pollution and save energy.
In other words, the fine powder functions as a wall to have rigidity. The wood powder and abaca pulp widen the entire surface area of the sheet and maximize the contact area between the particles, which strengthens the binding force to prevent shrinkage or cracking after drying Thereby maintaining the morphological stability and maintaining the required strength of the fiber yarn.
Particularly, the present invention relates to a method for pulverizing and classifying air stream type pulverizers of high-speed instantaneous reaction distributed in Hanji Co., The functional porosity of the present invention is effective in releasing a large amount of far infrared ray which is beneficial to the human body so that it is safe for the exposure to bacteria and viral bacteria harmful to the human body, State can be maintained.
As a result of the applicant's experiments, the tensile strength, the tear strength and the tensile strength for measuring the flexibility of the paper made from ordinary paper pulp produced by a conventional method were greatly improved, and the stability was morphologically stable. It was confirmed that sterilization antimicrobial ability to prevent diffusion and heat resistance to withstand high temperatures were also realized, and that it was formed so as not to be deformed by shrinkage or expansion due to moisture or heat while having perforation resistance.
In the present invention, a functional material such as a fine-grained biotite or a fine powder may be further added.
The functional material may be selected from various equivalents of physical properties that emit far-infrared rays and anions, and may be mixed with one or more. In order to maintain the effective properties such as electrical properties, anion emission, and far- And then pulverized in a fine particle state by a pulverizer such as a mill or a crusher.
In addition, vegetable natural adhesives that are harmless to the human body can be added as a glutamate enhancer. In this case, vegetable natural adhesives which are harmless to the human body as glutamate enhancer added to the mixed material can be gum, locust bean gum, At least one kind of water soluble polymer selected from the group consisting of water-soluble polymeric substances having a function as a thickener for the polymer.
In the addition step, additives such as sizing agent, retention agent, soil strength enhancer, wet strength agent and dispersant may be added to the mixed pulp mixed with the pulp in accordance with the purpose of use, and various properties required for the application may be imparted to the paper.
The dispersant of the present invention is preferably polyethylene oxide (PEO: POLY ETHYLENE OXIDE) for loosening the internal spacing of the cellulose fibers during the mixing process.
The present invention can be washed like ordinary fibers and is stronger than materials having different shape stability and durability, so that both weaving and knitting are possible, lightweight material is good in biodegradability, has excellent durability and washing resistance, has a unique texture and sensitivity Textile material
Further, the present invention can provide a paper sheet excellent in physical properties, particularly tensile strength, and can be applied to various fields related to paper making.
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While the present invention has been described in connection with certain exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. .
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Claims (1)
The wood pulp is finely pulverized to a particle size of 500-800 mesh in an air-flow mill so that there is no frictional heat or nutrient destruction,
The dispersant added to the fibrous phase mixture of Abaca pulp and wood pulp is mixed with 3% (weight ratio) of PEO (polyethylene oxide) in order to loosen the internal spacing of the cellulose fibers to remove entanglement, Forming,
The functional material mixed material formed as described above forms a functional sheet so that the fine wood pulp powder acts as a fiber wall when being papermaking to have rigidity,
The functional sheet thus formed is divided and finely stretched to produce a Hanji yarn having improved resistance to theft and tensile strength. A method for manufacturing Hanji paper for enhancing the physical properties of the Hanji paper
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150190130A KR101879650B1 (en) | 2015-12-30 | 2015-12-30 | The manufacturing method of a Korean-paper Fiber Having Exellent Tensile Strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150190130A KR101879650B1 (en) | 2015-12-30 | 2015-12-30 | The manufacturing method of a Korean-paper Fiber Having Exellent Tensile Strength |
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| Publication Number | Publication Date |
|---|---|
| KR20170079489A KR20170079489A (en) | 2017-07-10 |
| KR101879650B1 true KR101879650B1 (en) | 2018-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1020150190130A KR101879650B1 (en) | 2015-12-30 | 2015-12-30 | The manufacturing method of a Korean-paper Fiber Having Exellent Tensile Strength |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200053787A (en) | 2018-11-09 | 2020-05-19 | 이경희 | Process Of Producing Rayon Fabrics Having Excellent Touch And Cool-Feeling |
| KR102554140B1 (en) * | 2020-10-14 | 2023-07-12 | 윤재순 | Multiple function pulp papar yarn and shroud fabric for the dead from the same |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060027349A1 (en) * | 2002-12-20 | 2006-02-09 | Shannon Thomas G | Strength additives for tissue products |
| KR20130115676A (en) * | 2012-04-13 | 2013-10-22 | 주식회사 자연담은한지 | Fabrication methods of korean-paper fabrics and composite yarns of korean-paper filament |
| KR20130130887A (en) * | 2012-05-23 | 2013-12-03 | 주식회사 자연담은한지 | Anti-bacterial perfume korean wall-paper |
| KR20140119554A (en) * | 2013-04-01 | 2014-10-10 | 김신익 | manufacturing method for functional paper |
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2015
- 2015-12-30 KR KR1020150190130A patent/KR101879650B1/en active IP Right Grant
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060027349A1 (en) * | 2002-12-20 | 2006-02-09 | Shannon Thomas G | Strength additives for tissue products |
| KR20130115676A (en) * | 2012-04-13 | 2013-10-22 | 주식회사 자연담은한지 | Fabrication methods of korean-paper fabrics and composite yarns of korean-paper filament |
| KR20130130887A (en) * | 2012-05-23 | 2013-12-03 | 주식회사 자연담은한지 | Anti-bacterial perfume korean wall-paper |
| KR20140119554A (en) * | 2013-04-01 | 2014-10-10 | 김신익 | manufacturing method for functional paper |
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| KR20170079489A (en) | 2017-07-10 |
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