KR101399948B1 - Sythetic lether and method thereof - Google Patents

Sythetic lether and method thereof Download PDF

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Publication number
KR101399948B1
KR101399948B1 KR1020140012401A KR20140012401A KR101399948B1 KR 101399948 B1 KR101399948 B1 KR 101399948B1 KR 1020140012401 A KR1020140012401 A KR 1020140012401A KR 20140012401 A KR20140012401 A KR 20140012401A KR 101399948 B1 KR101399948 B1 KR 101399948B1
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KR
South Korea
Prior art keywords
layer
synthetic leather
printing
release paper
coating layer
Prior art date
Application number
KR1020140012401A
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Korean (ko)
Inventor
하영문
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하영문
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Application filed by 하영문 filed Critical 하영문
Priority to KR1020140012401A priority Critical patent/KR101399948B1/en
Application granted granted Critical
Publication of KR101399948B1 publication Critical patent/KR101399948B1/en
Priority to PCT/KR2015/000863 priority patent/WO2015119395A1/en
Priority to CN201580007112.2A priority patent/CN106232896A/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

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)

Abstract

The present invention provides a method for manufacturing synthetic leather that can embody various shapes and colors on the synthetic leather by forming a print layer on top of a release paper to have various shapes and colors, forming a coating layer in the process of applying liquid polyurethane resin to the cured print layer, and integrating the print layer and the coating layer, which adhere to each other while the coating layer is being cured. According to the present invention, operation efficiency can be increased as the synthetic leather having various patterns and colors on a surface can be manufactured via a single continuous synthetic leather manufacturing process that uses an existing synthetic leather manufacturing process facility without a need to conduct a printing process for printing on the surface of the manufactured synthetic leather independently after conducting a synthetic leather manufacturing process for manufacturing the synthetic leather using polyurethane in advance.

Description

TECHNICAL FIELD [0001] The present invention relates to a synthetic leather and a synthetic leather,

The present invention relates to a method for producing synthetic leather and synthetic leather, and more particularly to a method for producing synthetic leather and synthetic leather having various shapes and colors on their surfaces.

Generally, leather is divided into natural leather and artificial leather (synthetic leather), and artificial leather raw materials are mainly made of polyurethane, silicone, and PVC, and are typically referred to as polyurethane. Natural leather is dyed and can be commercialized by itself, but its price is higher than artificial leather. Therefore, development of leather goods using artificial leather is actively being carried out.

Generally, polyurethane is used in the manufacture of such artificial leather. In general, a polyurethane resin is mixed with a solvent and a toner, and the blended polyurethane resin is applied to a release paper. After bonding the fabric to the fabric, Then, artificial leather is manufactured through post-processing 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 which is a combination of a printing technique and a dyeing technique. The sublimation transfer is a method of bonding a transfer paper printed with a transfer ink without a plate process to a transfer object and thermocompression at a specific temperature and pressure of 160 to 220 degrees. The ink of the printed transfer paper is vaporized without being subjected to a liquid process at a high temperature and at the same time, when the vaporized dye enters the through hole of the transferred object and the temperature drops again, the gaseous dye remains on the surface of the transferred object The third polymeric material is left in a state of being infiltrated, and the protruded portion or any layer is not integrated.

However, in the case of printing on the surface of polyurethane using a sublimation transfer, the transfer paper and the polyurethane can not withstand the high heat and the transfer paper is not peeled off. On the surface of the polymer layer of the polyurethane resin, And the ink tackiness is decreased. As the time passes after the transfer, the pattern is gradually faded due to the evaporation of the sublimable dye, thereby deteriorating the quality of the product.

As a prior art related to the present invention, Korean Patent Laid-Open Publication No. 2002-0036983 discloses a method of sublimating and transferring a pattern onto a polyurethane surface and a polyurethane product transferred by this method. In order to solve the conventional problem that the sublimation transfer is impossible because the polyurethane surface can not withstand the high heat due to the sublimation transfer on the wet or dry polyurethane surface, When the polyurethane is mixed with a solvent to change into a liquid phase, silicone is added to the mixture, and the mixture is dried to produce a polyurethane product, so that the transfer sheet and the polyurethane surface can be easily separated without being adhered.

However, the above-mentioned prior art still uses a sublimation transfer printing method in which a transfer sheet is attached to a polyurethane layer and the dye is impregnated on the surface of the polyurethane layer by using heat and pressure, so that the pattern formation on the polyurethane surface is not obvious, The pattern is gradually faded due to the evaporation of the sublimable dye and the quality of the product is deteriorated as time goes by after the transfer.

1. Korean Patent Publication No. 2002-0036983 2. Korean Patent Publication No. 2003-0049638

It is an object of the present invention to provide a method for producing synthetic leather and synthetic leather which can produce various shapes and colors on the surface of synthetic leather.

Another object of the present invention is to provide a method for producing synthetic leather and synthetic leather which can improve the quality of synthetic leather by allowing various shapes and colors formed in synthetic leather to last for a long time without evaporation or bleeding of the dye.

In order to solve the above problems, a method of manufacturing synthetic leather, which is an embodiment of the present invention, includes the steps of forming a printing layer on a release paper, applying a coating liquid on a release paper on which a printing layer is formed, curing the coating liquid to form a coating layer, A step of attaching a fabric to the surface of the synthetic leather through an adhesive or a hot lamination method, and a step of separating the release layer immediately or after maturing, wherein the printing layer and the coating layer form the surface of the synthetic leather .

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According to an embodiment of the present invention, the step of forming the print layer on the release paper may be characterized in that the print layer has various shapes and colors through gravure printing or offset printing.

According to an embodiment of the present invention, the coating liquid is a polyurethane resin, and the coating liquid is coated on the release paper on which the printing layer is formed and then cured to form a coating layer, And is applied onto a release paper on which a printing layer is formed.

According to one embodiment of the present invention, the printing layer and the coating layer are made of the same material, and the coating layer is formed by coating the coating solution on the release layer on which the printing layer is formed, and then curing the coating layer. The polyurethane resin is cured And the printing layer and the coating layer are adhered to each other while the polyurethane resin is applied and cured on the printing layer.

In order to solve the above-mentioned problems, the synthetic leather, which is another embodiment of the present invention, is characterized in that the printing layer and the coating layer are adhered to each other while the polyurethane resin is cured on the release paper, And the surface of the synthetic leather is formed.

According to the present invention, a printing layer having various shapes and patterns is freely formed on a releasing paper in advance through gravure printing or offset printing, and then a liquid polyurethane resin is applied on the printing layer to form a coating layer Layer and the coating layer are integrally bonded to each other, the printed layer is intact on the surface of the synthetic leather (the printed layer, which is embossed on the release surface, is embossed on the surface of the synthetic leather) so that a design aesthetic feeling can be freely produced .

Also, there is a problem that the transfer paper and polyurethane, which are generated when the synthetic leather is manufactured in advance and then printed on the surface of the synthetic leather through sublimation transfer on the synthetic leather, can not withstand high heat, The pattern formed by the sublimation transfer is not clearly formed on the surface of the polymer layer of the polyurethane resin and the stickiness of the ink is deteriorated. As the sublimation dye evaporates, the pattern gradually fades as time passes after the transfer, It is possible to prevent the problem of deterioration.

In addition, a synthetic leather production process for producing synthetic leather using polyurethane in advance is not required to independently perform a printing process for printing on the surface of the synthetic leather produced, Since the synthetic leather having various shapes and colors can be manufactured on the surface through the synthetic leather manufacturing process, the working efficiency can be improved.

1 is a flowchart illustrating a method of manufacturing a synthetic leather according to an embodiment of the present invention.
2 is a cross-sectional view illustrating a manufacturing process of synthetic leather according to an embodiment of the present invention.
3 is a process diagram showing a process of forming a coating layer by applying a liquid polyurethane resin liquid according to an embodiment of the present invention to a release paper on which a print layer is formed.

The following detailed description is merely illustrative, and is merely an example of the present invention. Further, the principles and concepts of the present invention are provided for the purpose of being most useful and readily explaining.

Accordingly, it is not intended to provide a more detailed structure than is necessary for a basic understanding of the present invention, but it should be understood by those skilled in the art that various forms that can be practiced in the present invention are illustrated in the drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a flow chart for explaining a method of manufacturing a synthetic leather according to an embodiment of the present invention, and FIG. 2 is a sectional view showing a manufacturing process of synthetic leather according to an embodiment of the present invention.

As shown in FIG. 1, a synthetic leather is produced by first forming a printing layer 20 on a release paper 10 (S21, see FIG. 2A) 10) is coated with a polyurethane resin to form a coating layer 30 (S22, see Fig. 2 (b)). The artificial layer 50 is formed by applying the adhesive 40 on the coating layer 30 continuously or attaching the fabric through the hot lamination method (S23, see FIG. 2 (c)). Finally, only the release paper 10 is separated and a synthetic leather 500 having various shapes and colors (hereinafter referred to as a pattern) printed on its surface is produced (S24, see FIG. 2D).

First, in general, synthetic leather using a polyurethane resin is produced by applying a polyurethane resin to a release paper, curing it, applying an adhesive thereon to form an adhesive layer, adhering a fabric thereon, and then continuously synthesizing Leather manufacturing process. In order to produce various patterns on the surface of the synthetic leather produced thereafter, a transfer paper printed with various patterns is placed on the surface of the synthetic leather, and then heat and pressure are applied to transfer the pattern printed on the transfer paper to the surface of the synthetic leather. The printing process using judicial methods should be carried out.

In order to produce various patterns on the surface of synthetic leather using such sublimation transfer method, first, synthetic leather production process using synthetic resin and polyurethane resin and various patterns on the surface of synthetic leather using transfer paper The production process of the synthetic leather and the printing process are separated from each other.

However, the method of producing the synthetic leather of the present invention is not limited to printing (or transferring) the surface of the synthetic leather on which the printed layer printed on the transfer paper is previously formed, but also to 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, in the synthetic leather manufacturing method of the present invention, the release paper 10 on which the print layer 20 having various patterns formed by gravure printing or offset printing is formed in advance is used. That is, a liquid polyurethane resin is applied and cured by using the release paper 10 on which the printing layer 20 is formed (S21) to form a coating layer (S22) ), The printed layer and the coating layer are integrally adhered to each other to form the surface of the synthetic leather to produce various patterns.

Hereinafter, a detailed description will be given of a process for producing synthetic leather to be performed in each step of the present invention.

The process of forming the print layer on the release paper (S21) may be performed by gravure printing or offset printing on the release paper. Here, polyurethane resin may be used as the material of the print layer 20 and various patterns may be printed on the release paper through gravure printing. That is, a printing layer having various patterns desired by the operator is formed on a release paper by gravure printing, and a material forming the printing layer is formed by using a polyurethane resin, and then a poly During the formation of the coating layer by applying the urethane resin, the printed layer and the coating layer are integrated to form the surface of the synthetic leather. Here, the release paper 10 may be coated with silicone so that the release paper 10 can be easily released from the polyurethane of the print layer and the coating layer.

Next, a coating liquid is coated on the release paper on which the printing layer is formed and then cured to form a coating layer (S22). The liquid polyurethane resin for coating layer 30 is coated on the printing layer 20, So that the entire surface of the printed material is brought into contact with the surface. A printing layer 20 and a coating layer (not shown) made of the same material during the curing of the liquid polyurethane resin continuously contacting the print layer (for example, drying in a heat chamber of about 80 to 180 DEG C for 1 to 3 minutes) 30 are adhered and integrated. It is to be understood that no adhesive is required to integrate the printing layer 20 and the coating layer 30 in a printed layer 20 composed of solid polyurethane, It is possible to make the surface of the synthetic leather. The polyurethane resin can be used by dissolving MEK and DMF as a solvent and adjusting the viscosity in a liquid state.

Meanwhile, the synthetic leather manufacturing method of the present invention is characterized in that high heat of 180 ° C or higher (for example, about 200 to 250 ° C) and pressure (4 to 8 kg / cm 2), such as sublimation transfer, The printing layer 20 of the present invention is integrated with the coating layer 30 without deforming according to heat and pressure in the form of a printed pattern so as to be directly formed on the surface of the synthetic leather, You can increase sense.

3 is a process diagram showing a process of forming a coating layer by applying a liquid polyurethane resin liquid according to an embodiment of the present invention to a release paper on which a print layer is formed.

Referring to FIG. 3, a coater (coating machine) may be used to adjust the thickness (for example, about 1 mm) to which the polyurethane resin 31 is applied. The knife 101 having the predetermined interval 200 and the knife roller 102 are disposed in the cotter and the release paper 10 on which the print layer 20 is formed is rotated by the rotation of the knife roller 102, (200). A release paper 10 on which a liquid polyurethane resin 31 is added and a printing layer 20 is formed together with a liquid polyurethane resin 31 is formed on the release paper 10 on which the printing layer 20 in the front end region of the coater is formed. The polyurethane resin is flattened by the fixed knife 101 when passing through the predetermined gap 200. A polyurethane resin is formed on the release paper 10 on which the printing layer 20 is formed in the rear end region of the coater, And then the coating layer 30 can be formed.

Referring again to FIG. 1, the process of forming a monolayer (S23) by attaching a fabric on a coating layer is performed by applying an aqueous adhesive or an oil-based adhesive on the coating layer, drying and then attaching a fabric or hot lamination And the fabric layer is adhered to form the circular layer (50). Finally, the process of separating or aging the release paper 10 immediately and separating only the release paper 10 (S24) can be used to produce the synthetic leather having the synthetic leather surface formed by integrating the printing layer and the coating layer.

That is, according to the present invention, the release layer formed with the print layer having various patterns in advance is used as the base base layer, and the print layer is integrally bonded with the undercoat layer in which the liquid polyurethane resin is cured to form the synthetic leather surface, The quality of the synthetic leather can be improved. 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, there is no need to invest additional facilities and the production efficiency can be improved as the continuous process progress is made.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, I will understand.

Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined by equivalents to the appended claims, as well as the appended claims.

10: release paper 20: print layer
30: Coating layer 31: Polyurethane resin
40: adhesive layer 50:
101: knife 102: cutting roller
500: Synthetic leather

Claims (6)

Forming a print layer on the release paper,
Applying a coating liquid on a release paper on which a printing layer is formed, and curing the coating liquid to form a coating layer,
Attaching a fabric to the coating layer through an adhesive or forming a monolayer through a hot lamination method, and
Further comprising the step of isolating the mold immediately after or immediately after aging,
Wherein the printing layer and the coating layer form the surface of the synthetic leather.
delete The method according to claim 1,
Wherein the step of forming the print layer on the release paper comprises printing layers having various shapes and colors through gravure printing or offset printing.
The method of claim 3,
Wherein the coating liquid is a polyurethane resin,
Wherein the coating liquid is coated on a release paper on which a printing layer is formed and then cured to form a coating layer on the release paper on which the printing layer is formed with a predetermined thickness through a coater.
The method of claim 3,
The printing layer and the coating layer are made of the same material,
The step of coating the coating liquid on the release paper on which the printing layer is formed and then curing the coating layer to form the coating layer comprises a step of curing the polyurethane resin on the release paper to coat the printing layer and the coating layer while the polyurethane resin is applied and cured on the printing layer previously formed, ≪ / RTI >
delete
KR1020140012401A 2014-02-04 2014-02-04 Sythetic lether and method thereof KR101399948B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1020140012401A KR101399948B1 (en) 2014-02-04 2014-02-04 Sythetic lether and method thereof
PCT/KR2015/000863 WO2015119395A1 (en) 2014-02-04 2015-01-27 Synthetic leather and method for manufacturing synthetic leather
CN201580007112.2A CN106232896A (en) 2014-02-04 2015-01-27 Synthetic leather and the manufacture method of synthetic leather

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020140012401A KR101399948B1 (en) 2014-02-04 2014-02-04 Sythetic lether and method thereof

Publications (1)

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KR101399948B1 true KR101399948B1 (en) 2014-05-29

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CN (1) CN106232896A (en)
WO (1) WO2015119395A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101656641B1 (en) * 2016-01-28 2016-09-09 엄기천 Method of preparing Thermoplastic Polyurethane film with patterns

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108660784A (en) * 2018-05-31 2018-10-16 海宁市硖石迅奇科技信息咨询服务部 A kind of warp knit PU wrapping strips and its manufacturing method

Citations (1)

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Publication number Priority date Publication date Assignee Title
JP2007100289A (en) 2005-09-09 2007-04-19 Dainippon Ink & Chem Inc Method for producing leathery material

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Publication number Priority date Publication date Assignee Title
JP4480263B2 (en) * 2000-12-26 2010-06-16 アキレス株式会社 Leather sheet
KR100437897B1 (en) * 2001-12-17 2004-06-30 이진섭 Polyurethane artificial leather not blurring with dye and method of makeing it by transfer printing
JP4950598B2 (en) * 2006-08-30 2012-06-13 帝人コードレ株式会社 Manufacturing method of sheet-like material
CN102758360B (en) * 2012-07-06 2014-04-09 河南永合塑胶有限公司 Polyurethane synthetic leather cleaning production process based on release paper transfer coating method

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Publication number Priority date Publication date Assignee Title
JP2007100289A (en) 2005-09-09 2007-04-19 Dainippon Ink & Chem Inc Method for producing leathery material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101656641B1 (en) * 2016-01-28 2016-09-09 엄기천 Method of preparing Thermoplastic Polyurethane film with patterns

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WO2015119395A1 (en) 2015-08-13

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