WO2015119395A1 - Synthetic leather and method for manufacturing synthetic leather - Google Patents

Synthetic leather and method for manufacturing synthetic leather Download PDF

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Publication number
WO2015119395A1
WO2015119395A1 PCT/KR2015/000863 KR2015000863W WO2015119395A1 WO 2015119395 A1 WO2015119395 A1 WO 2015119395A1 KR 2015000863 W KR2015000863 W KR 2015000863W WO 2015119395 A1 WO2015119395 A1 WO 2015119395A1
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WO
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Prior art keywords
synthetic leather
layer
printing
release paper
coating
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PCT/KR2015/000863
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French (fr)
Korean (ko)
Inventor
하영문
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하영문
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Application filed by 하영문 filed Critical 하영문
Priority to CN201580007112.2A priority Critical patent/CN106232896A/en
Publication of WO2015119395A1 publication Critical patent/WO2015119395A1/en

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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
    • D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/10—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/06—Interconnection of layers permitting easy separation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
    • D06P5/003—Transfer printing
    • D06P5/007—Transfer printing using non-subliming dyes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/748—Releasability
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/75—Printability

Definitions

  • the present invention relates to a synthetic leather and a method for manufacturing the synthetic leather, and more particularly to a method for manufacturing synthetic leather and synthetic leather having a variety of shapes and colors on the surface.
  • leather is divided into natural leather and artificial leather (synthetic leather), the raw material of artificial leather is largely used polyurethane, silicone, PVC, etc. Here, it is typically referred to as polyurethane.
  • Natural leather can be commercialized as it is dyed and dyed, but it is more expensive than artificial leather. Therefore, the development of leather goods using artificial leather has been actively made.
  • Polyurethane is mainly used when manufacturing such artificial leather, and generally, a solvent and a toner are mixed in a polyurethane resin, and the blended polyurethane resin is applied to a release paper, and then bonded to a fabric, and then aged and peeled. Next, artificial leather is manufactured by post-treatment such as printing on the surface of artificial leather.
  • Sublimation transfer is used to print various shapes and colors on the polyurethane surface.
  • the sublimation transfer is a digital printing method combining a printing technique and a dyeing technique.
  • the sublimation transfer is performed by bonding a transfer paper printed with a transfer ink without a plate making process to a transfer object and thermally compressing it at a specific temperature and pressure of 160 to 220 degrees.
  • the ink on the transfer paper is then vaporized without undergoing a liquid process at a high temperature, and at the same time, when the vaporized dye flows into the through hole on the surface of the transfer object and the temperature drops again, the gaseous dye becomes the surface of the transfer object. It remains as a third polymer material in the infiltrated state and is integrated in a state where no protrusions or layers are formed.
  • the transfer paper and the polyurethane do not withstand high heat, the transfer paper does not peel off, and the surface made of the polymer layer of the polyurethane resin Not only does not form the pattern is not obvious, but the adhesion of the ink is inferior, and as time passes after the transfer, the pattern gradually fades with the evaporation of the sublimable dye, there is a problem of lowering the quality of the product.
  • Korean Patent Laid-Open Publication No. 2002-0036983 discloses a method for sublimating and transferring a pattern on a polyurethane surface and a polyurethane product transferred by the method.
  • the prior art is a one-component type to solve the conventional problem that when the sublimation transfer to the wet or dry polyurethane surface, the polyurethane surface does not endure high heat (glue) and adheres to the transfer paper so that the sublimation transfer is impossible.
  • the silicone is added, mixed, and then dried to prepare a polyurethane product, so that the transfer paper and the polyurethane surface do not adhere to each other and are easily separated.
  • the prior art still uses the sublimation transfer printing by attaching the transfer paper to the polyurethane layer and printing the dye into the polyurethane surface by using heat and pressure, the pattern formation on the polyurethane surface as well as the adhesion of the ink Falling, and as time passes after the transfer, the pattern gradually fades with the evaporation of the sublimable dye, which still has the problem of degrading the quality of the product.
  • an object of the present invention is to provide a synthetic leather and a method for producing a synthetic leather that can produce a variety of shapes and colors on the surface of the synthetic leather.
  • the present invention is to provide a method for producing a synthetic leather and synthetic leather that can improve the quality of the synthetic leather by the long lasting various shapes and colors formed on the synthetic leather without evaporation or bleeding of the dye.
  • the method of manufacturing a synthetic leather of an embodiment of the present invention is a step of forming a printing layer on a release paper, forming a coating layer by applying a coating solution on a release paper on which the printing layer is formed, and curing, on the coating layer Adhering the fabric through an adhesive or hot lamination to form a fabric layer, and immediately or after aging and separating only the release, wherein the print layer and the coating layer form the surface of the synthetic leather.
  • the forming of the printing layer on the release paper is characterized in that the printing layer has various shapes and colors through gravure printing or offset printing.
  • the coating liquid is a polyurethane resin
  • the step of applying a coating liquid on a release paper on which a printing layer is formed and then curing the coating layer to form a coating layer through a coater (coater) to a predetermined thickness is characterized in that the printing layer is applied on the release paper formed.
  • the printing layer and the coating layer is the same material
  • the step of forming a coating layer by applying a coating solution on a release paper on which the printing layer is formed to form a coating layer is cured polyurethane resin on the release paper in advance
  • Polyurethane resin is applied on the print layer
  • the print layer and the coating layer is characterized in that it is integrally formed by curing.
  • synthetic leather which is another embodiment of the present invention is a polyurethane resin is cured on a release paper, the polyurethane resin is applied to the printed layer formed on the pre-formed print layer while the printing layer and the coating layer are bonded and integrally It is characterized in that the surface of the synthetic leather is formed.
  • the gravure printing or offset printing in advance to form a printing layer having a variety of shapes and patterns on the release paper in advance and then the printing when forming a coating layer formed by applying a liquid polyurethane resin on the printing layer
  • the layer and the coating layer are integrally combined so that the printed layer is embedded on the surface of the synthetic leather as it is (the printed layer embossed on the release paper appears intaglio on the surface of the synthetic leather), thereby creating a design aesthetics freely.
  • the transfer paper and polyurethane generated when printing on the surface of the synthetic leather through the sublimation transfer on the manufactured synthetic leather does not withstand high heat (transfer paper) does not peel off and
  • transfer paper On the surface of the polymer layer of polyurethane resin, the pattern formation by sublimation transfer does not occur clearly, and the adhesiveness of the ink is inferior, and as time passes after transfer, the pattern gradually fades with the evaporation of the sublimable dye to improve the quality of the product. The problem of deterioration can be prevented at the source.
  • FIG. 1 is a flowchart illustrating a method of manufacturing synthetic leather according to an embodiment of the present invention.
  • FIG. 2 is a cross-sectional view showing a manufacturing process of synthetic leather for each manufacturing process step according to an embodiment of the present invention.
  • Figure 3 is a process chart showing a process of forming a coating layer by applying a liquid polyurethane resin solution to a release paper formed with a printing layer according to an embodiment of the present invention.
  • coating layer 31 polyurethane resin
  • Characterized by a method for producing a synthetic leather characterized in that the printing layer and the coating layer forms the surface of the synthetic leather.
  • FIG. 1 is a flowchart illustrating a method for manufacturing synthetic leather according to an embodiment of the present invention
  • Figure 2 is a cross-sectional view showing a manufacturing process of synthetic leather for each manufacturing process step according to an embodiment of the present invention.
  • a printing layer 20 is formed on a release paper 10 (S21, see FIG. 2A), and a release paper on which the printing layer 20 is formed ( 10) by applying a polyurethane resin on the coating layer 30 is formed and cured (S22, Fig. 2 (b)).
  • the fabric layer 50 is formed by applying the adhesive 40 on the coating layer 30 or by attaching the fabric through a hot lamination method (S23, FIG. 2C).
  • the release paper 10 is separated to produce a synthetic leather 500 having various shapes and colors (hereinafter referred to as a pattern) printed on the surface (S24, FIG. 2 (d)).
  • synthetic leather using a polyurethane resin is a continuous synthesis in which a polyurethane resin is applied on a release paper, and then cured and an adhesive is formed thereon to form an adhesive layer. It consists of a leather manufacturing process. Subsequently, to produce various patterns on the surface of the manufactured synthetic leather, the transfer paper on which the various patterns are printed is placed on the surface of the synthetic leather, and then the heat and pressure are applied so that the printed pattern on the transfer paper is transferred to the surface of the synthetic leather. The printing process using the judicial method must be carried out.
  • the synthetic leather manufacturing method of the present invention is not printed (or transferred) on the surface of the synthetic leather in which the printing layer printed on the transfer paper is prepared in advance, but on the surface of the synthetic leather during the manufacturing process of the synthetic leather using the polyurethane resin. No additional process is required to produce various patterns. That is, the synthetic leather manufacturing method of the present invention uses a release paper 10 having a preprinted print layer 20 having various patterns printed through gravure printing or offset printing.
  • the release paper 10 formed with the printing layer 20 (S21) by coating and curing a polyurethane resin in liquid phase to form a coating layer (S22), fabric adhesion and maturation (S23) and only release paper 10 (S24)
  • the printing layer and the coating layer are integrally attached to form the surface of the synthetic leather to produce various patterns.
  • the process of forming the printing layer on the release paper (S21) may be performed through gravure printing or offset printing on the release paper.
  • a variety of patterns may be printed on a release paper by using a polyurethane resin as a material forming the print layer 20 and gravure printing. That is, by forming a printing layer having various patterns desired by an operator through gravure printing, and by using a polyurethane resin as the material forming the printing layer, the same material on the release paper on which the printing layer is formed During the application of the urethane resin to form a coating layer, the printing layer and the coating layer may be integrated to form the surface of the synthetic leather.
  • the release paper 10 release paper
  • a liquid polyurethane resin is applied to form a coating layer 30 on a printing layer 20 that is already solidified. It first comes into contact with the entire surface of the substrate.
  • the printing layer 20 and the coating layer made of the same material during the curing of the liquid polyurethane resin for example, drying for 1 to 3 minutes in a heat chamber of about 80 to 180 ° C.
  • the printing layer continuously ( 30) are bonded and integrated.
  • a predetermined adhesive is not required to integrate the print layer 20 and the coating layer 30, which means that the printing layer 20 made of solid polyurethane is coated with the coating layer while the liquid polyurethane resin is cured.
  • the polyurethane resin may be used by adjusting the viscosity in a liquid state by using MEK and DMF as a solvent.
  • the synthetic leather manufacturing method of the present invention such as a sublimation transfer to transfer the pattern printed on the transfer paper on the surface of the synthetic leather already manufactured high temperature (for example 200 ⁇ 250 °C) and pressure (4 ⁇ 8kg / Cm 2)
  • the printing layer 20 of the present invention is integrated with the coating layer 30 without deformation due to heat and pressure in the form of a printed pattern, thereby being produced on the surface of the synthetic leather as it is. I can raise a feeling.
  • Figure 3 is a process chart showing a process of forming a coating layer by applying a liquid polyurethane resin solution to a release paper formed with a printing layer according to an embodiment of the present invention.
  • a coater (coater, coating machine) may be used to adjust the thickness (eg, about 1 mm) to which the polyurethane resin 31 is applied.
  • the coater has a knife 101 and a cutting roller 102 having a predetermined interval 200, and the release paper 10 having the printing layer 20 formed thereon is rotated by the cutting roller 102. It is injected at intervals 200. Then, on the release paper 10 on which the print layer 20 of the front end of the coater is formed, the liquid polyurethane resin 31 is added and the release paper 10 on which the print layer 20 is formed together with the liquid polyurethane resin 31.
  • the polyurethane resin When the polyurethane resin is flattened by the knife 101 fixed when passing through the predetermined interval 200, the polyurethane resin is formed to a predetermined thickness on the release paper 10 having the printing layer 20 formed in the rear coater area.
  • the coating layer 30 may be formed by being applied and then cured.
  • the process of forming a fabric layer by pasting the fabric on the coating layer (S23) is followed by applying an aqueous adhesive or an oil-based adhesive on the coating layer, drying and pasting the fabric, or through hot lamination using heat.
  • the fabric is bonded to form the fabric layer 50.
  • the process (S24) of separating or aging only the release paper 10 immediately and then releasing only the release paper 10 the printed layer and the coating layer are integrally formed, thereby forming a synthetic leather having a surface of synthetic leather.
  • the printing layer is integrally combined with the coating layer during the curing of the liquid polyurethane resin to form a synthetic leather surface
  • the shape of the printed layer having a directing without being deformed can improve the quality of synthetic leather.
  • the printing layer can be formed on the surface of the synthetic leather without changing the manufacturing process of the synthetic leather, no additional facility is required to be invested, and as the continuous process proceeds, the production efficiency can be improved.
  • the printing layer and the coating layer when forming a coating layer formed by applying a liquid polyurethane resin on the printing layer after freely forming a printing layer having various shapes and patterns on the release paper in advance through gravure printing or offset printing.
  • the printed layer is embedded on the surface of synthetic leather as it is (the printed layer embossed on the release paper appears intaglio on the surface of synthetic leather), so that the design aesthetics can be freely produced. It is a very likely invention.

Abstract

The present invention provides a method for manufacturing synthetic leather wherein a printing layer is formed on release paper in advance so as to have various shapes and colors, a liquid-phase polyurethane resin liquid is applied to the hardened printing layer, thereby forming a coating layer, and the printing layer and the coating layer are bonded and integrated while the coating layer is hardened, thereby realizing various shapes and colors on the surface of the synthetic leather. According to the present invention, synthetic leather having various shapes and colors on the surface thereof can be manufactured through a single continuous synthetic leather manufacturing process, which uses synthetic leather manufacturing process facilities with no change, without having to perform a synthetic leather manufacturing process for manufacturing synthetic leather using polyurethane in advance, followed by an independent printing process for making printings on the surface of the manufactured synthetic leather, thereby improving the working efficiency.

Description

합성피혁 및 합성피혁의 제조방법Synthetic Leather and Manufacturing Method of Synthetic Leather
본 발명은 합성피혁 및 합성피혁의 제조방법에 관한 것으로서, 더욱 상세하게는 표면에 다양한 모양 및 색상을 갖는 합성피혁 및 합성피혁의 제조방법에 관한 것이다.The present invention relates to a synthetic leather and a method for manufacturing the synthetic leather, and more particularly to a method for manufacturing synthetic leather and synthetic leather having a variety of shapes and colors on the surface.
일반적으로 가죽은 천연가죽과 인조가죽(합성피혁)으로 나누어지며, 인조가죽의 원료는 크게 폴리우레탄, 실리콘, PVC 등을 사용하며, 여기서는 대표적으로 폴리우레탄이라 칭한다. 천연가죽은 염색을 하여 염색된 그 자체로 상품화가 가능하지만 인조가죽에 비하여 가격이 고가이다. 따라서 인조가죽을 이용한 가죽 상품의 개발이 활발하게 이루어지고 있다.In general, leather is divided into natural leather and artificial leather (synthetic leather), the raw material of artificial leather is largely used polyurethane, silicone, PVC, etc. Here, it is typically referred to as polyurethane. Natural leather can be commercialized as it is dyed and dyed, but it is more expensive than artificial leather. Therefore, the development of leather goods using artificial leather has been actively made.
이러한 인조가죽을 제조시 주로 폴리우레탄이 사용되며, 일반적으로 폴리우레탄수지에 용제와 토너를 넣어 배합하고, 배합된 폴리우레탄수지를 이형지에 도포하고, 이것에 원단에 접합후 숙성, 박리과정을 거친 다음 인조가죽 표면에 인쇄 등 후처리과정을 거쳐 인조가죽을 제조한다.Polyurethane is mainly used when manufacturing such artificial leather, and generally, a solvent and a toner are mixed in a polyurethane resin, and the blended polyurethane resin is applied to a release paper, and then bonded to a fabric, and then aged and peeled. Next, artificial leather is manufactured by post-treatment such as printing on the surface of artificial leather.
폴리우레탄 표면에 다양한 모양 및 색상을 인쇄하는 방법으로 승화전사가 사용된다. 상기 승화전사란 인쇄기술과 염색기술을 복합시킨 디지털 인쇄방식으로 제판과정 없이 전사잉크로 프린트한 전사지를 피전사물에 접합시켜 160~220도의 특정온도와 압력으로 열 압착해 주는 것인데, 이와 같이 열압착하면 프린트된 전사지의 잉크는 고온상태에서 액체과정을 거치지 않고 기화되며, 동시에 피 전사물 표면의 통공 속으로 기체화된 염료가 유입되어 온도가 다시 떨어졌을 때, 그 기체상태의 염료는 피 전사물의 표면에 침투한 상태에서 제3의 고분자물질로 남게 되어 돌출부분이나 아무런 층이 지지 않는 상태로 일체화 되는 것이다.Sublimation transfer is used to print various shapes and colors on the polyurethane surface. The sublimation transfer is a digital printing method combining a printing technique and a dyeing technique. The sublimation transfer is performed by bonding a transfer paper printed with a transfer ink without a plate making process to a transfer object and thermally compressing it at a specific temperature and pressure of 160 to 220 degrees. The ink on the transfer paper is then vaporized without undergoing a liquid process at a high temperature, and at the same time, when the vaporized dye flows into the through hole on the surface of the transfer object and the temperature drops again, the gaseous dye becomes the surface of the transfer object. It remains as a third polymer material in the infiltrated state and is integrated in a state where no protrusions or layers are formed.
그러나 승화전사를 이용하여 폴리우레탄의 표면에 인쇄할 경우, 전사지와 폴리우레탄이 고열(高熱)에 견디지 못하여 전사지가 박리 되지 않는 현상이 발생하고, 폴리우레탄 수지의 고분자 층으로 이루어진 표면에는 승화전사에 의한 문양 형성이 뚜렷이 일어나지 않을 뿐만 아니라 잉크의 점착성이 떨어지고, 전사 후 시간이 지날수록 승화성 염료의 증발에 따라 무늬가 점차로 옅어져 제품의 질을 저하시키는 문제점이 있다.However, when printing on the surface of the polyurethane by sublimation transfer, the transfer paper and the polyurethane do not withstand high heat, the transfer paper does not peel off, and the surface made of the polymer layer of the polyurethane resin Not only does not form the pattern is not obvious, but the adhesion of the ink is inferior, and as time passes after the transfer, the pattern gradually fades with the evaporation of the sublimable dye, there is a problem of lowering the quality of the product.
본 발명과 관련된 선행기술로 대한민국 공개특허공보 제2002-0036983호의 "폴리우레탄 표면에 무늬를 승화 전사하는 방법 및 이 방법으로 전사된 폴리우레탄 제품"이 개시되어 있다. 상기 선행기술은 습건식이나 건식 폴리우레탄 표면에 승화전사를 하면 폴리우레탄 표면이 고열(高熱)을 견디지 못하여 전사용지와 접착되어 분리가 되지 않아 승화전사가 불가능하였던 종래의 문제점을 해결하기 위하여 일액형 폴리우레탄을 용제와 배합하여 액상으로 변화시킬 때 실리콘을 첨가하여 혼합한 다음, 이를 건조시켜 폴리우레탄 제품을 제조하게 되면, 전사지와 폴리우레탄 표면이 접착되지 않고 쉽게 분리가 되도록 한 것이다.In the prior art related to the present invention, Korean Patent Laid-Open Publication No. 2002-0036983 discloses a method for sublimating and transferring a pattern on a polyurethane surface and a polyurethane product transferred by the method. The prior art is a one-component type to solve the conventional problem that when the sublimation transfer to the wet or dry polyurethane surface, the polyurethane surface does not endure high heat (glue) and adheres to the transfer paper so that the sublimation transfer is impossible. When the polyurethane is mixed with the solvent to change the liquid state, the silicone is added, mixed, and then dried to prepare a polyurethane product, so that the transfer paper and the polyurethane surface do not adhere to each other and are easily separated.
그러나 상기 선행기술은 여전히 폴리우레탄층에 전사지를 붙이고 열과 압력을 이용하여 폴리우레탄 표면에 염료가 스며들게 함으로써 인쇄하는 승화전사를 이용함에 따라 폴리우레탄 표면에 문양 형성이 뚜렷이 일어나지 않을 뿐만 아니라 잉크의 점착성이 떨어지고, 전사 후 시간이 지날수록 승화성 염료의 증발에 따라 무늬가 점차로 옅어져 제품의 질을 저하시키는 문제점을 여전히 가지고 있다.However, the prior art still uses the sublimation transfer printing by attaching the transfer paper to the polyurethane layer and printing the dye into the polyurethane surface by using heat and pressure, the pattern formation on the polyurethane surface as well as the adhesion of the ink Falling, and as time passes after the transfer, the pattern gradually fades with the evaporation of the sublimable dye, which still has the problem of degrading the quality of the product.
본 발명은 상술한 문제점을 해결하기 위해 안출된 것으로서, 본 발명의 목적은 합성피혁의 표면에 다양한 모양 및 색상을 연출할 수 있는 합성피혁 및 합성피혁의 제조방법을 제공하기 위한 것이다.The present invention has been made to solve the above-described problems, an object of the present invention is to provide a synthetic leather and a method for producing a synthetic leather that can produce a variety of shapes and colors on the surface of the synthetic leather.
또한 본 발명은 염료의 증발 또는 번짐없이 합성피혁에 형성된 다양한 모양 및 색상이 오래도록 지속가능함으로써 합성피혁의 품질을 향상시킬 수 있는 합성피혁 및 합성피혁의 제조방법을 제공하기 위한 것이다.In another aspect, the present invention is to provide a method for producing a synthetic leather and synthetic leather that can improve the quality of the synthetic leather by the long lasting various shapes and colors formed on the synthetic leather without evaporation or bleeding of the dye.
상기 과제를 해결하기 위해, 본 발명의 일실시예인 합성피혁의 제조방법은 이형지 상에 인쇄층을 형성하는 단계, 인쇄층이 형성된 이형지 상에 코팅액를 도포 후 경화시켜 코팅층을 형성하는 단계, 상기 코팅층 상에 접착제를 통하여 원단을 붙이거나 핫 래미네이션방식을 통하여 원단층을 형성하는 단계 및 즉시 또는 숙성시킨 후 이형지만을 분리하는 단계를 더 포함하며, 인쇄층과 코팅층이 합성피혁의 표면을 형성하는 것을 특징으로 한다.In order to solve the above problems, the method of manufacturing a synthetic leather of an embodiment of the present invention is a step of forming a printing layer on a release paper, forming a coating layer by applying a coating solution on a release paper on which the printing layer is formed, and curing, on the coating layer Adhering the fabric through an adhesive or hot lamination to form a fabric layer, and immediately or after aging and separating only the release, wherein the print layer and the coating layer form the surface of the synthetic leather. It features.
본 발명의 일실시예의 일태양에 의하면, 상기 이형지 상에 인쇄층을 형성하는 단계는 그라비아 인쇄 또는 옵셋인쇄를 통하여 인쇄층이 다양한 모양 및 색상을 갖는 것을 특징으로 한다.According to one embodiment of the present invention, the forming of the printing layer on the release paper is characterized in that the printing layer has various shapes and colors through gravure printing or offset printing.
본 발명의 일실시예의 일태양에 의하면, 상기 코팅액은 폴리우레탄수지이며, 인쇄층이 형성된 이형지 상에 코팅액를 도포 후 경화시켜 코팅층을 형성하는 단계는 코터(coater)를 통하여 상기 코팅액이 소정의 두께로 인쇄층이 형성된 이형지 상에 도포되는 것을 특징으로 한다.According to one embodiment of the present invention, the coating liquid is a polyurethane resin, and the step of applying a coating liquid on a release paper on which a printing layer is formed and then curing the coating layer to form a coating layer through a coater (coater) to a predetermined thickness. It is characterized in that the printing layer is applied on the release paper formed.
본 발명의 일실시예의 일태양에 의하면, 상기 인쇄층과 코팅층은 동일 물질이며, 인쇄층이 형성된 이형지 상에 코팅액를 도포 후 경화시켜 코팅층을 형성하는 단계는 이형지 상에 폴리우레탄수지가 경화되어 미리 형성된 인쇄층상에 폴리우레탄수지가 도포되어 경화되는 동안 인쇄층과 코팅층이 접착되어 일체로 형성되는 것을 특징으로 한다.According to one embodiment of the present invention, the printing layer and the coating layer is the same material, the step of forming a coating layer by applying a coating solution on a release paper on which the printing layer is formed to form a coating layer is cured polyurethane resin on the release paper in advance Polyurethane resin is applied on the print layer, and the print layer and the coating layer is characterized in that it is integrally formed by curing.
상기 과제를 해결하기 위해, 본 발명의 또 다른 일실시예인 합성피혁은 이형지 상에 폴리우레탄수지가 경화되어 미리 형성된 인쇄층상에 폴리우레탄수지가 도포되어 경화되는 동안 인쇄층과 코팅층이 접착되어 일체로 형성되어 합성피혁의 표면이 형성되는 것을 특징으로 한다.In order to solve the above problems, synthetic leather which is another embodiment of the present invention is a polyurethane resin is cured on a release paper, the polyurethane resin is applied to the printed layer formed on the pre-formed print layer while the printing layer and the coating layer are bonded and integrally It is characterized in that the surface of the synthetic leather is formed.
상기와 같은 본 발명에 따르면, 그라비아 인쇄 또는 옵셋 인쇄를 통하여 미리 이형지 상에 다양한 모양 및 무늬를 갖는 인쇄층을 자유롭게 형성한 후 상기 인쇄층상에 액상의 폴리우레탄수지를 도포하여 형성된 코팅층 형성시 상기 인쇄층과 코팅층이 일체로 결합되어 합성피혁의 표면에 인쇄층이 그대로 내포(이형지상에 양각으로 인쇄된 인쇄층이 합성피혁의 표면에서는 음각으로 나타남)됨으로써 디자인적인 심미감을 자유롭게 연출할 수 있는 장점이 있다.According to the present invention as described above, the gravure printing or offset printing in advance to form a printing layer having a variety of shapes and patterns on the release paper in advance and then the printing when forming a coating layer formed by applying a liquid polyurethane resin on the printing layer The layer and the coating layer are integrally combined so that the printed layer is embedded on the surface of the synthetic leather as it is (the printed layer embossed on the release paper appears intaglio on the surface of the synthetic leather), thereby creating a design aesthetics freely. .
또한 종래 미리 합성피혁을 제조한 후, 제조된 합성피혁상에 승화전사를 통하여 합성피혁의 표면에 인쇄를 할 경우 발생되는 전사지와 폴리우레탄이 고열(高熱)에 견디지 못하여 전사지가 박리 되지 않는 문제 및 폴리우레탄 수지의 고분자 층으로 이루어진 표면에는 승화전사에 의한 문양 형성이 뚜렷이 일어나지 않을 뿐만 아니라 잉크의 점착성이 떨어지고, 전사 후 시간이 지날수록 승화성 염료의 증발에 따라 무늬가 점차로 옅어져 제품의 질을 저하시키는 문제점을 원천적으로 방지할 수 있다.In addition, after the conventional synthetic leather is manufactured in advance, the transfer paper and polyurethane generated when printing on the surface of the synthetic leather through the sublimation transfer on the manufactured synthetic leather does not withstand high heat (transfer paper) does not peel off and On the surface of the polymer layer of polyurethane resin, the pattern formation by sublimation transfer does not occur clearly, and the adhesiveness of the ink is inferior, and as time passes after transfer, the pattern gradually fades with the evaporation of the sublimable dye to improve the quality of the product. The problem of deterioration can be prevented at the source.
또한 미리 폴리우레탄을 이용한 합성피혁을 제조하는 합성피혁 제조공정 수행후 제조된 합성피혁의 표면상에 인쇄를 하기 위한 인쇄공정을 독립적으로 진행할 필요없이 합성피혁 제조공정 설비를 그대로 이용하는 단 한번의 연속적인 합성피혁 제조공정을 통하여 표면에 다양한 모양 및 색상을 갖는 합성피혁을 제조할 수 있음으로 작업 효율성을 향상시킬 수 있다.In addition, there is no need to perform the printing process for printing on the surface of the synthetic leather manufactured after the synthetic leather manufacturing process that manufactures the synthetic leather using polyurethane in advance. Through the synthetic leather manufacturing process, it is possible to manufacture synthetic leather having various shapes and colors on the surface, thereby improving work efficiency.
도 1은 본 발명의 일 실시예에 따른 합성피혁의 제조방법을 설명하기 위한 순서도이다.1 is a flowchart illustrating a method of manufacturing synthetic leather according to an embodiment of the present invention.
도 2는 본 발명의 일 실시예에 따른 제조 공정단계별 합성피혁의 제조과정을 보인 단면도이다.2 is a cross-sectional view showing a manufacturing process of synthetic leather for each manufacturing process step according to an embodiment of the present invention.
도 3은 본 발명의 일 실시예에 따른 액상의 폴리우레탄수지액을 인쇄층이 형성된 이형지에 도포하여 코팅층을 형성하는 과정을 보인 공정도이다.Figure 3 is a process chart showing a process of forming a coating layer by applying a liquid polyurethane resin solution to a release paper formed with a printing layer according to an embodiment of the present invention.
도면의 주요부호 설명Explanation of Major Symbols in Drawings
10:이형지 20:인쇄층 10: release paper 20: printing layer
30:코팅층 31:폴리우레탄수지 30: coating layer 31: polyurethane resin
40:접착제층 50:원단층 40: adhesive layer 50: fabric layer
101:나이프 102:도마롤러101: knife 102: cutting board roller
500:합성피혁500: synthetic leather
이형지 상에 인쇄층을 형성하는 단계,Forming a printing layer on the release paper,
인쇄층이 형성된 이형지 상에 코팅액를 도포 후 경화시켜 코팅층을 형성하는 단계,Forming a coating layer by applying a coating solution on a release paper on which a printing layer is formed and curing the coating solution,
상기 코팅층 상에 접착제를 통하여 원단을 붙이거나 핫 래미네이션방식을 통하여 원단층을 형성하는 단계 및 즉시 또는 숙성시킨 후 이형지만을 분리하는 단계를 더 포함하며,Attaching the fabric through the adhesive on the coating layer or forming a fabric layer through a hot lamination method and separating the mold release immediately or after aging,
인쇄층과 코팅층이 합성피혁의 표면을 형성하는 것을 특징으로 하는 합성피혁의 제조방법을 특징으로 한다.Characterized by a method for producing a synthetic leather, characterized in that the printing layer and the coating layer forms the surface of the synthetic leather.
이하의 상세한 설명은 예시에 지나지 않으며, 본 발명의 실시 예를 도시한 것에 불과하다. 또한 본 발명의 원리와 개념은 가장 유용하고, 쉽게 설명할 목적으로 제공된다.The following detailed description is only illustrative, and merely illustrates embodiments of the present invention. In addition, the principles and concepts of the present invention are provided for the purpose of explanation and most useful.
따라서, 본 발명의 기본 이해를 위한 필요 이상의 자세한 구조를 제공하고자 하지 않았음은 물론 통상의 지식을 가진 자가 본 발명의 실체에서 실시될 수 있는 여러 가지의 형태들을 도면을 통해 예시한다.Accordingly, various forms that can be implemented by those of ordinary skill in the art, as well as not intended to provide a detailed structure beyond the basic understanding of the present invention through the drawings.
이하 첨부한 도면을 참조하여 본 발명의 바람직한 실시예에 대한 구성 및 작용을 상세히 설명하면 다음과 같다.Hereinafter, the configuration and operation of the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.
도 1은 본 발명의 일 실시예에 따른 합성피혁의 제조방법을 설명하기 위한 순서도이고, 도 2는 본 발명의 일 실시예에 따른 제조 공정단계별 합성피혁의 제조과정을 보인 단면도이다.1 is a flowchart illustrating a method for manufacturing synthetic leather according to an embodiment of the present invention, Figure 2 is a cross-sectional view showing a manufacturing process of synthetic leather for each manufacturing process step according to an embodiment of the present invention.
도 1에서 보는 바와 같이, 합성피혁의 제조방법은 먼저 이형지(10) 상에 인쇄층(20)을 형성하고(S21, 도 2의 (a)참조), 상기 인쇄층(20)이 형성된 이형지(10) 상에 폴리우레탄수지를 도포하여 코팅층(30)을 형성하여 경화시킨다(S22, 도 2의 (b)참조). 계속적으로 상기 코팅층(30)상에 접착제(40)를 도포하거나 핫 래미네이션방식을 통하여 원단을 부착시킴으로써 원단층(50)을 형성한다(S23, 도 2의(c)참조). 마지막으로 이형지(10)만을 분리하여 다양한 모양 및 색상(이하 무늬라 한다)가 표면에 인쇄된 합성피혁(500)이 제조된다(S24, 도 2의 (d)참조).As shown in FIG. 1, in the method of manufacturing synthetic leather, first, a printing layer 20 is formed on a release paper 10 (S21, see FIG. 2A), and a release paper on which the printing layer 20 is formed ( 10) by applying a polyurethane resin on the coating layer 30 is formed and cured (S22, Fig. 2 (b)). Subsequently, the fabric layer 50 is formed by applying the adhesive 40 on the coating layer 30 or by attaching the fabric through a hot lamination method (S23, FIG. 2C). Finally, only the release paper 10 is separated to produce a synthetic leather 500 having various shapes and colors (hereinafter referred to as a pattern) printed on the surface (S24, FIG. 2 (d)).
먼저 일반적으로 폴리우레탄수지을 이용한 합성피혁은 이형지상에 폴리우레탄수지를 도포한 후 경화시키고 그 위에 접착제를 도포하여 접착층을 형성한 다음 그 위에 원단을 접착시키고 숙성 후 상기 이형지만을 분리시키는 연속적인 합성피혁 제조공정으로 이루어진다. 이후 제조된 합성피혁의 표면에 다양한 무늬를 연출하기 위하여 다양한 무늬가 인쇄된 전사지를 합성피혁의 표면에 올려놓은 다음 열 및 압력을 가하여 전사지에 인쇄된 무늬가 합성피혁의 표면에 전사되도록 하는 승화전사법을 이용한 인쇄공정을 진행하여야 한다.In general, synthetic leather using a polyurethane resin is a continuous synthesis in which a polyurethane resin is applied on a release paper, and then cured and an adhesive is formed thereon to form an adhesive layer. It consists of a leather manufacturing process. Subsequently, to produce various patterns on the surface of the manufactured synthetic leather, the transfer paper on which the various patterns are printed is placed on the surface of the synthetic leather, and then the heat and pressure are applied so that the printed pattern on the transfer paper is transferred to the surface of the synthetic leather. The printing process using the judicial method must be carried out.
이러한 승화전사법을 이용하여 합성피혁의 표면에 다양한 무늬를 연출하기 위하여는 먼저 이형지 및 폴리우레탄수지를 이용하여 합성피혁을 제조하는 합성피혁 제조공정과 전사지를 이용한 합성피혁의 표면에 다양한 무늬를 인쇄하기 위하여 독립적으로 진행되는 인쇄공정이 요구됨으로써 합성피혁의 제조공정과 인쇄공정이 분리되어 있는 실정이다.In order to produce various patterns on the surface of synthetic leather using the sublimation transfer method, first, various patterns are printed on the surface of synthetic leather using synthetic leather manufacturing process and transfer paper to manufacture synthetic leather using release paper and polyurethane resin. In order to independently process the printing process is required in order to separate the manufacturing process and the printing process of synthetic leather.
그러나 본 발명의 합성피혁 제조방법은 전사지 상에 인쇄된 인쇄층이 미리 제조되어 있는 합성피혁의 표면에 인쇄(또는 전사)되는 것이 아니라 폴리우레탄수지를 이용한 합성피혁의 제조공정중 합성피혁의 표면에 다양한 무늬를 연출하기 위한 어떤 추가적인 공정이 요구되지 않는다. 즉 본 발명의 합성피혁 제조방법은 그라비아 인쇄또는 옵셋 인쇄를 통하여 인쇄된 다양한 무늬가 형성된 인쇄층(20)이 미리 형성된 이형지(10)를 이용한다. 즉 이러한 인쇄층(20)이 형성된 이형지(10)를 이용하여(S21) 액상의 폴리우레탄수지 도포 및 경화하여 코팅층 형성(S22), 원단 부착 및 숙성(S23) 그리고 이형지(10)만을 분리(S24)하는 합성피혁 제조공정을 그대로 진행하는 도중 인쇄층과 코팅층이 일체로 부착되어 합성피혁의 표면을 이루어 다양한 무늬를 연출할 수 있다.However, the synthetic leather manufacturing method of the present invention is not printed (or transferred) on the surface of the synthetic leather in which the printing layer printed on the transfer paper is prepared in advance, but on the surface of the synthetic leather during the manufacturing process of the synthetic leather using the polyurethane resin. No additional process is required to produce various patterns. That is, the synthetic leather manufacturing method of the present invention uses a release paper 10 having a preprinted print layer 20 having various patterns printed through gravure printing or offset printing. That is, by using the release paper 10 formed with the printing layer 20 (S21) by coating and curing a polyurethane resin in liquid phase to form a coating layer (S22), fabric adhesion and maturation (S23) and only release paper 10 (S24) In the course of the synthetic leather manufacturing process as it is, the printing layer and the coating layer are integrally attached to form the surface of the synthetic leather to produce various patterns.
이하 본 발명의 각 단계로 진행되는 합성피혁의 제조과정에 대하여 상세히 설명하도록 한다.Hereinafter will be described in detail with respect to the manufacturing process of synthetic leather proceeding to each step of the present invention.
먼저 이형지 상에 인쇄층을 형성하는 과정(S21)은 이형지상에 그라비아 인쇄 또는 옵셋 인쇄를 통하여 이루어질 수 있다. 여기서 인쇄층(20)을 이루는 물질로 폴리우레탄수지를 이용하고 그라비아 인쇄를 통하여 이형지상에 다양한 무늬가 인쇄되어 형성될 수 있다. 즉 그라비아 인쇄를 통하여 이형지 상에 작업자가 원하는 다양한 무늬를 갖는 인쇄층을 형성하고, 또한 상기 인쇄층을 형성하는 물질을 폴리우레탄수지를 사용함에 따라 이후 상기 인쇄층이 형성된 이형지 상에 동일 물질인 폴리우레탄수지를 도포하여 코팅층을 형성하는 도중 인쇄층과 코팅층이 일체화되어 합성피혁의 표면을 형성할 수 있다. 여기서 상기 이형지(10,릴리즈페이퍼)는 인쇄층 및 코팅층의 폴리우레탄과 쉽게 이형될 수 있도록 표면에 실리콘이 도포되어 있을 수 있다.First, the process of forming the printing layer on the release paper (S21) may be performed through gravure printing or offset printing on the release paper. Here, a variety of patterns may be printed on a release paper by using a polyurethane resin as a material forming the print layer 20 and gravure printing. That is, by forming a printing layer having various patterns desired by an operator through gravure printing, and by using a polyurethane resin as the material forming the printing layer, the same material on the release paper on which the printing layer is formed During the application of the urethane resin to form a coating layer, the printing layer and the coating layer may be integrated to form the surface of the synthetic leather. Here, the release paper 10 (release paper) may be coated with silicon on the surface to be easily released with the polyurethane of the printing layer and the coating layer.
다음으로 인쇄층이 형성된 이형지 상에 코팅액을 도포 후 경화시켜 코팅층을 형성하는 과정(S22)은 이미 고형화되어 있는 인쇄층(20)상에 코팅층(30)을 형성하기 위한 액상의 폴리우레탄수지가 도포되어 먼저 인쇄물의 전 표면과 맞닿게 된다. 계속적으로 인쇄층과 맞닿아 있는 액상의 폴리우레탄수지의 경화(예를 들어 80∼180℃ 정도의 열챔버에서 1∼3분간 드라이)가 진행되는 도중 동일 물질로 이루어진 인쇄층(20)과 코팅층(30)은 접착되어 일체화된다. 여기서 인쇄층(20)과 코팅층(30)을 일체화시키기 위하여 소정의 접착제가 요구되지 않음은 당연하며, 이는 고상의 폴리우레탄으로 이루어진 인쇄층(20)이 액상의 폴리우레탄수지가 경화되는 도중 코팅층과 접착되어 일체화됨으로써 합성피혁의 표면할 수 있다. 상기 폴리우레탄 수지는 MEK 및 DMF를 용제로 사용하여 녹여 액상상태로 점도를 조정하여 사용될 수 있다.Next, in the process of forming a coating layer by applying a coating solution on a release paper on which a printing layer is formed and curing (S22), a liquid polyurethane resin is applied to form a coating layer 30 on a printing layer 20 that is already solidified. It first comes into contact with the entire surface of the substrate. The printing layer 20 and the coating layer made of the same material during the curing of the liquid polyurethane resin (for example, drying for 1 to 3 minutes in a heat chamber of about 80 to 180 ° C.) in contact with the printing layer continuously ( 30) are bonded and integrated. In this case, it is obvious that a predetermined adhesive is not required to integrate the print layer 20 and the coating layer 30, which means that the printing layer 20 made of solid polyurethane is coated with the coating layer while the liquid polyurethane resin is cured. By being bonded and integrated, the surface of synthetic leather can be made. The polyurethane resin may be used by adjusting the viscosity in a liquid state by using MEK and DMF as a solvent.
한편 본 발명의 합성피혁 제조방법은 이미 제조된 합성피혁의 표면에 전사지에 인쇄된 무늬를 전사시키는 승화전사와 같이 180℃ 이상의 고열(예를 들어 200∼250℃ 정도) 및 압력(4~8kg/㎠)을 가할 필요가 없음으로, 본 발명의 인쇄층(20)은 인쇄된 무늬의 형태 그대로 열 및 압력에 따른 변형없이 코팅층(30)과 일체화됨으로써 합성피혁의 표면에 그대로 연출됨으로써 합성피혁의 심미감을 높일 수 있다.On the other hand, the synthetic leather manufacturing method of the present invention, such as a sublimation transfer to transfer the pattern printed on the transfer paper on the surface of the synthetic leather already manufactured high temperature (for example 200 ~ 250 ℃) and pressure (4 ~ 8kg / Cm 2), the printing layer 20 of the present invention is integrated with the coating layer 30 without deformation due to heat and pressure in the form of a printed pattern, thereby being produced on the surface of the synthetic leather as it is. I can raise a feeling.
도 3은 본 발명의 일 실시예에 따른 액상의 폴리우레탄수지액을 인쇄층이 형성된 이형지에 도포하여 코팅층을 형성하는 과정을 보인 공정도이다.Figure 3 is a process chart showing a process of forming a coating layer by applying a liquid polyurethane resin solution to a release paper formed with a printing layer according to an embodiment of the present invention.
도 3을 참조하면, 폴리우레탄수지(31)가 도포되는 두께(예를 들어 1mm 정도)를 조정하기 위하여 코터(coater, coating machine)가 이용될 수 있다. 상기 코터는 소정의 간격(200)을 갖는 나이프(101)와 도마롤러(102)가 배치되고, 먼저 인쇄층(20)이 형성된 이형지(10)가 도마롤러(102)의 회전에 의하여 상기 소정의 간격(200)으로 투입된다. 이후 코터의 전단영역의 인쇄층(20)이 형성된 이형지(10)상에는 액상의 폴리우레탄수지(31)가 첨가되고 액상의 폴리우레탄수지(31)와 함께 인쇄층(20)이 형성된 이형지(10)가 소정의 간격(200)을 통과시 고정된 나이프(101)에 의하여 폴리우레탄수지가 평탄화됨에 따라 코터 후단영역에는 인쇄층(20)이 형성된 이형지(10)상에 소정의 두께로 폴리우레탄수지가 도포되고 이후 경화되어 코팅층(30)이 형성될 수 있다.Referring to FIG. 3, a coater (coater, coating machine) may be used to adjust the thickness (eg, about 1 mm) to which the polyurethane resin 31 is applied. The coater has a knife 101 and a cutting roller 102 having a predetermined interval 200, and the release paper 10 having the printing layer 20 formed thereon is rotated by the cutting roller 102. It is injected at intervals 200. Then, on the release paper 10 on which the print layer 20 of the front end of the coater is formed, the liquid polyurethane resin 31 is added and the release paper 10 on which the print layer 20 is formed together with the liquid polyurethane resin 31. When the polyurethane resin is flattened by the knife 101 fixed when passing through the predetermined interval 200, the polyurethane resin is formed to a predetermined thickness on the release paper 10 having the printing layer 20 formed in the rear coater area. The coating layer 30 may be formed by being applied and then cured.
다시 도1을 참조하면, 다음으로 코팅층 상에 원단을 붙여 원단층을 형성하는 과정(S23)은 코팅층상에 수성접착제 또는 유성접착제를 도포, 건조한후 원단을 붙이거나 열을 이용한 핫래미네이션을 통하여 원단을 접착시켜 원단층(50)을 형성한다. 마지막으로 즉시 이형지(10)만을 분리하거나 숙성시킨 후 이형지(10)만을 분리하는 과정(S24)을 통하여 인쇄층 및 코팅층이 일체로 이루어져 합성피혁의 표면이 형성된 합성피혁이 제조될 수 있다.Referring back to FIG. 1, the process of forming a fabric layer by pasting the fabric on the coating layer (S23) is followed by applying an aqueous adhesive or an oil-based adhesive on the coating layer, drying and pasting the fabric, or through hot lamination using heat. The fabric is bonded to form the fabric layer 50. Finally, through the process (S24) of separating or aging only the release paper 10 immediately and then releasing only the release paper 10, the printed layer and the coating layer are integrally formed, thereby forming a synthetic leather having a surface of synthetic leather.
즉 본 발명에 따르면, 미리 다양한 무늬를 갖는 인쇄층을 형성된 이형지를 기본베이스층으로 하여, 상기 인쇄층이 액상의 폴리우레탄수지가 경화되는 도중 코팅층과 일체로 결합되어 합성피혁 표면을 형성함으로써 다양한 무늬를 갖는 인쇄층의 형태가 변형되지 않고 그대로 연출됨으로써 합성피혁의 품질을 향상시킬 수 있다. 또한 합성피혁의 제조공정의 변함없이 인쇄층을 합성피혁의 표면에 형성할 수 있음으로 추가적인 시설을 투자할 필요가 없으며, 연속적인 공정 진행이 이루어짐에 따라 생산효율성을 향상시킬 수 있다.That is, according to the present invention, by using a release paper having a printing layer having a variety of patterns in advance as a base base layer, the printing layer is integrally combined with the coating layer during the curing of the liquid polyurethane resin to form a synthetic leather surface The shape of the printed layer having a directing without being deformed can improve the quality of synthetic leather. In addition, since the printing layer can be formed on the surface of the synthetic leather without changing the manufacturing process of the synthetic leather, no additional facility is required to be invested, and as the continuous process proceeds, the production efficiency can be improved.
이상에서는 대표적인 실시 예를 통하여 본 발명에 대하여 상세하게 설명하였으나, 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자는 상술한 실시 예에 대하여 본 발명의 범주에서 벗어나지 않는 한도 내에서 다양한 변형이 가능함을 이해할 것이다.The present invention has been described in detail with reference to exemplary embodiments, but those skilled in the art to which the present invention pertains can make various modifications without departing from the scope of the present invention. Will understand.
그러므로 본 발명의 권리범위는 설명된 실시 예에 국한되어 정해져서는 안 되며, 후술하는 특허청구범위뿐만 아니라 이 특허청구범위와 균등한 것들에 의해 정해져야 한다.Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.
본 발명에 따르면, 그라비아 인쇄 또는 옵셋 인쇄를 통하여 미리 이형지 상에 다양한 모양 및 무늬를 갖는 인쇄층을 자유롭게 형성한 후 상기 인쇄층상에 액상의 폴리우레탄수지를 도포하여 형성된 코팅층 형성시 상기 인쇄층과 코팅층이 일체로 결합되어 합성피혁의 표면에 인쇄층이 그대로 내포(이형지상에 양각으로 인쇄된 인쇄층이 합성피혁의 표면에서는 음각으로 나타남)됨으로써 디자인적인 심미감을 자유롭게 연출할 수 있도록 한 것으로서, 산업상 이용가능성이 매우 높은 발명이다.According to the present invention, the printing layer and the coating layer when forming a coating layer formed by applying a liquid polyurethane resin on the printing layer after freely forming a printing layer having various shapes and patterns on the release paper in advance through gravure printing or offset printing. Combined with this one, the printed layer is embedded on the surface of synthetic leather as it is (the printed layer embossed on the release paper appears intaglio on the surface of synthetic leather), so that the design aesthetics can be freely produced. It is a very likely invention.

Claims (4)

  1. 이형지 상에 인쇄층을 형성하는 단계,Forming a printing layer on the release paper,
    인쇄층이 형성된 이형지 상에 코팅액를 도포 후 경화시켜 코팅층을 형성하는 단계,Forming a coating layer by applying a coating solution on a release paper on which a printing layer is formed and curing the coating solution,
    상기 코팅층 상에 접착제를 통하여 원단을 붙이거나 핫 래미네이션방식을 통하여 원단층을 형성하는 단계 및 즉시 또는 숙성시킨 후 이형지만을 분리하는 단계를 더 포함하며,Attaching the fabric through the adhesive on the coating layer or forming a fabric layer through a hot lamination method and separating the mold release immediately or after aging,
    인쇄층과 코팅층이 합성피혁의 표면을 형성하는 것을 특징으로 하는 합성피혁의 제조방법.A method for producing synthetic leather, characterized in that the printing layer and the coating layer form the surface of the synthetic leather.
  2. 제 1 항에 있어서,The method of claim 1,
    상기 이형지 상에 인쇄층을 형성하는 단계는 그라비아 인쇄 또는 옵셋 인쇄를 통하여 인쇄층이 다양한 모양 및 색상을 갖는 것을 특징으로 하는 합성피혁의 제조방법.Forming the print layer on the release paper is a method of manufacturing a synthetic leather, characterized in that the print layer has a variety of shapes and colors through gravure printing or offset printing.
  3. 제 2 항에 있어서,The method of claim 2,
    상기 코팅액은 폴리우레탄수지이며,The coating liquid is a polyurethane resin,
    인쇄층이 형성된 이형지 상에 코팅액를 도포 후 경화시켜 코팅층을 형성하는 단계는 코터(coater)를 통하여 상기 코팅액이 소정의 두께로 인쇄층이 형성된 이형지 상에 도포되는 것을 특징으로 하는 합성피혁의 제조방법.The step of forming a coating layer by applying a coating solution on a release paper on which a printing layer is formed and curing the coating liquid is coated onto a release paper on which a printing layer is formed to a predetermined thickness through a coater.
  4. 제 2 항에 있어서,The method of claim 2,
    상기 인쇄층과 코팅층은 동일 물질이며,The print layer and the coating layer is the same material,
    인쇄층이 형성된 이형지 상에 코팅액를 도포 후 경화시켜 코팅층을 형성하는 단계는 이형지 상에 폴리우레탄수지가 경화되어 미리 형성된 인쇄층상에 폴리우레탄수지가 도포되어 경화되는 동안 인쇄층과 코팅층이 접착되어 일체로 형성되는 것을 특징으로 하는 합성피혁의 제조방법.The step of forming a coating layer by applying a coating solution on a release paper on which a printing layer is formed and then curing the coating layer is performed by curing the polyurethane resin on a release paper, and then applying a curing coating to the printing layer. Method for producing a synthetic leather, characterized in that formed.
PCT/KR2015/000863 2014-02-04 2015-01-27 Synthetic leather and method for manufacturing synthetic leather WO2015119395A1 (en)

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