CN112522959A - Release film for manufacturing artificial leather - Google Patents
Release film for manufacturing artificial leather Download PDFInfo
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- CN112522959A CN112522959A CN201911049385.XA CN201911049385A CN112522959A CN 112522959 A CN112522959 A CN 112522959A CN 201911049385 A CN201911049385 A CN 201911049385A CN 112522959 A CN112522959 A CN 112522959A
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- artificial leather
- release film
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- light reflection
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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
- D06N3/007—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by mechanical or physical treatments
- D06N3/0077—Embossing; Pressing of the surface; Tumbling and crumbling; Cracking; Cooling; Heating, e.g. mirror finish
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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
- D06N3/0086—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique
- D06N3/0095—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by inversion technique; by transfer processes
- D06N3/0097—Release surface, e.g. separation sheets; Silicone papers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/042—Coating with two or more layers, where at least one layer of a composition contains a polymer binder
-
- 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
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
- D06N3/0015—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using fibres of specified chemical or physical nature, e.g. natural silk
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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
- D06N3/18—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with two layers of different macromolecular materials
- D06N3/183—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with two layers of different macromolecular materials the layers are one next to the other
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- 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
- D06N2211/00—Specially adapted uses
- D06N2211/12—Decorative or sun protection articles
- D06N2211/28—Artificial leather
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Textile Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
Abstract
The present invention relates to a release film for manufacturing artificial leather, comprising: a base layer; a pattern layer formed on the base layer, forming a pattern to be transferred to an artificial leather; and a release layer formed on the pattern layer, wherein a light reflection control structure is formed on the surface of the pattern layer. After the artificial leather is manufactured by using the release film having the above structure, the visibility of complicated figures and characters to be emphasized on the artificial leather can be maximized without requiring another printing or gravure printing process.
Description
Technical Field
The present invention relates to a release film for manufacturing artificial leather, and more particularly, to a release film capable of manufacturing artificial leather including various patterns having high visibility.
Background
Here, a background art about the present invention is provided, which is not necessarily a well-known art.
A general artificial leather is manufactured by forming a skin film of synthetic resin such as PVC or PU (polyurethane) on a release paper having a leather grain or other predetermined grain formed thereon, and then bonding a fabric or a woven or non-woven fabric using an adhesive. In this case, when a pattern such as a figure is formed on the surface of the artificial leather, a pattern is transferred to the surface of the synthetic resin by a general release paper.
Release paper (or release paper) is used in various fields, but the release paper used in the manufacturing process of polyurethane synthetic leather forms a synthetic resin layer such as polyethylene on a paper fabric and presses the synthetic resin layer using a mold formed with a desired grain so as to form a leather grain or embossing (emboss). Since the synthetic resin layer formed by pressure should be peeled off after the transfer of the grain on PVC or PU for forming artificial leather, treatment with a release agent such as silicone is performed.
On the other hand, when a grain is expressed on the artificial leather, in order to form a finer pattern, a film or paper is used as a base layer, and a photo-curable composition is used as a synthetic resin layer formed on the base layer. However, when the photocurable composition is used, the texture formed on the surface of the transferred artificial leather is often not sufficiently reflected, and the texture to be emphasized is blurred, thereby having a limitation in securing visibility.
Therefore, in general, when a complicated figure, a character, or the like, which is a rich and fine pattern, is expressed on the artificial leather, there is a problem in that it is necessary to introduce another printing process or to adopt a method of forming a gravure.
Disclosure of Invention
The present invention is directed to forming a pattern of artificial leather by using a light reflection control structure for controlling the direction and amount of reflected light, and properly arranging the light reflection control structure to form a pattern of complicated lines, letters, or the like.
Specifically, the light reflection control structure may employ a light reflection structure and/or a light scattering structure, and the light reflection structure and/or the light scattering structure are appropriately arranged to form a pattern of complex lines or characters.
In addition, the present invention has an object to precisely control the surface of the unevenness forming the light reflection structure to improve the visibility of the pattern formed on the artificial leather.
However, the object of the present invention is not limited to the above-mentioned object, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.
In order to solve the above problems, the present invention provides a release film for manufacturing artificial leather, comprising: a base layer; a pattern layer formed on the base layer, forming a pattern to be transferred to an artificial leather; and a release layer formed on the pattern layer, wherein a light reflection control structure is formed on the surface of the pattern layer.
In some embodiments, the light reflection control structure includes a light reflection structure that reflects incident light, and the light reflection structure includes one or more concave-convex structures selected from a prism (prism) shape and a prism-like shape, a lens (lenticule) shape and a lens-like shape, and a polygonal pyramid shape, a cone shape and a corner cube (corner cube) shape and a polygonal pyramid-like shape, and a cone shape and a corner cube-like shape.
In some embodiments, the light reflection structure is formed by regularly arranging the concave-convex structure.
In some embodiments, the uneven structure has a size of 5 to 1000 μm.
In some embodiments, a surface roughness Ra of a surface for reflecting light in the light reflecting structure is 1.5 μm or less.
In some embodiments, the light reflection control structure further comprises a light scattering structure that scatters incident light.
In certain embodiments, the light scattering structure comprises a structure selected from one or more of a Moth-eye (Moth-eye) morphology, a random asperity morphology, a hemispherical array morphology.
Advantageous effects
The artificial leather manufactured by the release film with the structure can form complicated patterns or characters on the artificial leather. In addition, after the artificial leather is manufactured, the visibility of complicated figures and characters to be emphasized can be maximized without requiring a separate printing or gravure printing process.
Drawings
Fig. 1A to 1F are cross-sectional views showing a light reflection structure formed on a release film according to an embodiment of the present invention.
Fig. 2A and 2B are cross-sectional views showing a light scattering structure formed on a release film according to an embodiment of the present invention.
Fig. 3 is an enlarged plan view showing a reflection pattern formed on a release film according to an embodiment of the present invention.
Fig. 4 is a schematic view showing a character pattern formed on a release film according to an embodiment of the present invention.
Fig. 5 is a schematic view showing a retroreflective pattern formed on a release film according to an embodiment of the present invention.
Fig. 6A and 6B are enlarged plan views showing the light reflection structure formed on the release film according to the embodiment of the present invention.
Fig. 7 is a sectional view showing the structure of a release film according to an embodiment of the present invention.
Fig. 8 is a sectional view showing a state before the artificial leather according to the embodiment of the present invention is separated from the release film.
Fig. 9 is an enlarged photograph showing a light reflection structure in which the convexes and concaves in the form of prisms are regularly arranged in one specific example of the present invention.
Fig. 10 is an enlarged photograph showing a light reflection structure in which lens-shaped convexes and concaves are regularly arranged in one example of the present invention.
Fig. 11 is an enlarged photograph showing an example of a light scattering structure including an irregular uneven structure in a specific example of the present invention.
Fig. 12 is an enlarged photograph showing a light scattering structure in a non-standardized hemispherical form arranged in one example of the present invention.
Fig. 13A and 13B are enlarged photographs showing an example of a rhombus-shaped reflection pattern formed by arranging a light reflection structure and a light scattering structure on an imaging release film according to an embodiment of the present invention.
Fig. 14A and 14B are enlarged photographs showing another example of a pattern-shaped reflection pattern formed by arranging a light reflection structure and a light scattering structure on an imaging release film according to an embodiment of the present invention.
Fig. 15 is a photograph of a sports shoe manufactured using artificial leather manufactured using the release film according to the present invention.
Reference numerals
30: reflective pattern
31: light scattering structure
70: release film
71: base layer
72: patterned layer
73: release layer
80: resin layer
83: adhesive layer
84: fabric
90: artificial leather
Detailed Description
In the following detailed description, before explaining the present invention in detail, it is to be understood that the terminology used in the description is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the present invention which will be limited only by the scope of the appended claims. Unless otherwise mentioned, all technical and scientific terms used in this specification have the same meaning as commonly understood in the art in technical terms.
Throughout this specification and claims, unless otherwise indicated, the term "comprise", or variations such as "comprises" or "comprising", are intended to imply the inclusion of a stated item, step or group of items or steps but not the exclusion of any other item, step or group of items or steps. On the other hand, unless explicitly stated to the contrary, the embodiments and examples of the present invention may be combined with any other examples except for the above. In particular, any feature indicated as being preferred or advantageous may also be combined with other features.
In one embodiment of the present invention, a release film required for manufacturing artificial leather including various patterns on the surface is provided. The release film for manufacturing artificial leather according to an embodiment of the present invention includes a light reflection control structure, so that the manufactured artificial leather includes a pattern formed by arranging the light reflection control structure.
Human vision can be thought of as the process of perceiving visible light reflected from the surface of things and entering our eyes. Therefore, according to the release film for manufacturing artificial leather according to an embodiment of the present invention, a structure for controlling light stimulating human vision is adopted when forming a pattern of artificial leather. In the present invention, a structure capable of controlling the direction of reflected light and the amount of reflected light as intended is defined as a light reflection control structure. In the present invention, strictly speaking, the light reflection control structure formed on the release film is actually a different structure corresponding to the light reflection control structure formed on the artificial leather as the final product in a mirror image. However, for convenience, in the description of the present invention, both the light reflection control structure formed on the release film and the light reflection control structure formed on the surface of the artificial leather by transferring the pattern layer of the release film are represented as the light reflection control structure. Also, the terms referred to as a light reflection structure and a light scattering structure as described later are also construed to mean both a structure formed on the release film and a structure transferred to the artificial leather.
Next, a light reflection control structure according to an embodiment of the present invention will be specifically described.
The light reflection control structure may comprise a light reflection structure. The light reflection structure is capable of reflecting incident light, and the light reflection structure is a structure capable of efficiently reflecting incident light according to the purpose. The light reflection structure may include at least one of a prism shape and a prism-like shape, a lens shape and a lens-like shape, a polygonal pyramid shape, a conical shape or a corner cube and a polygonal pyramid-like shape, and a conical shape or a corner cube-like concave-convex structure, which are regularly arranged, and when forming the pattern of the artificial leather, a combination of one or more selected from a plurality of light reflection structures may be used, and the light reflection structure may be formed of one or more of the concave-convex structures.
Fig. 1A to 1F are sectional views of a light reflection structure formed on a release film for manufacturing artificial leather according to an embodiment of the present invention. As shown in fig. 1A to 1D, the light reflection structure may be formed by regularly arranging a concave-convex structure in a prism form or a prism-like form. For example, as shown in fig. 1A, the prism shape includes a triangular prism shape having a cross section in the shape of a regular triangle or an isosceles triangle and a flat surface. As shown in fig. 1B to 1D, the prism-like form includes a form in which the cross-sectional shape is a shape obtained by cutting the apex of a triangle (fig. 1C) or a form in which the apex is arc-shaped (fig. 1D). As shown in fig. 1B, a prism-like form is also included in a form in which triangular cross sections are regularly spaced. As shown in fig. 1E and 1F, the light reflection structure may be formed by regularly arranging an uneven structure of lens-shaped unevenness. Although the lens-like form, the polygonal pyramid form, the conical form and the corner cubes and the polygonal pyramid-like form, the conical form and the corner cubes are not shown in fig. 1A to 1F, the structure thereof may be determined and arranged in comparison with the prism form, and the prism-like form and the lens form as shown in fig. 1A to 1F. In the following description, the prism-like form, the lens-like form, the polygonal pyramid-like form, the circular cone-like form, and the corner-like prism are also referred to as similar forms of prism form, lens form, polygonal pyramid form, circular cone form, and corner prism.
In the light reflection structure, when the irregularities in the prism shape are regularly arranged, the enlarged plan view may be drawn in a form of a straight line spaced at a constant interval (pitch). However, when the concave-convex structures of the prism or prism-like form are regularly arranged, the tracks of the peaks can be expressed as ripples or the like, which are exemplarily shown in fig. 6A and 6B.
The size of the irregularities of the light reflection structure may be expressed by the interval between patterns and other variables (e.g., height, cross-sectional angle, etc.). For example, in the prism form shown in FIG. 1A, the pitch p, which is the distance between the vertices of the cross-sectional triangle, may be 5 to 1000 μm. Typically, in prismatic morphology, the height h is determined when determining the pitch to profile angle a. The section angle a may be 5 ° to 170 °. In the present invention, the size of the light reflection structure can be expressed by the pitch and height between the regularly arranged concave-convex structures. The light reflecting structure size (pitch) may be defined, for example, as the pitch representing a prism, prism-like or lens morphology. For example, when the light reflecting structure is a polygonal pyramid, the size (pitch) may be defined as the longest base of the polygonal pyramid, and when in a conical state, may be defined as the diameter. In addition, the height may refer to the highest length (e.g., vertex-to-base height) when a perpendicular line is connected from base to vertex.
In addition, as the light reflection structure, when the surface of the artificial leather is formed with the projections and depressions in the form of the polygonal pyramid or the corner cube, and in the form of the polygonal pyramid or the corner cube, a retroreflective effect can be obtained. Fig. 5 is a schematic view illustrating a retroreflective pattern formed on a release film for manufacturing artificial leather according to an embodiment of the present invention. In particular, the corner cube shape shown in fig. 5 has an effect of emphasizing a desired pattern when light is irradiated as a structure capable of reflecting light along a trajectory in an incident direction. Therefore, the same or similar effect can be exhibited without forming other beads (beads) or the like for imparting the retroreflective effect, and the manufacturability of the artificial leather having the retroreflective effect can be improved. Furthermore, since beads (beads) or the like conventionally used for providing a retroreflective effect are prevented from falling off, the durability of the retroreflective effect can be improved.
In forming the artificial leather including the light reflection controlling structure, in order to form a pattern for maximizing a light reflection effect to improve visibility, a surface of a concavo-convex form constituting the light reflection structure should be flat. That is, when the roughness value of the surface of the concavo-convex form, which is a portion for reflecting light, exceeds a predetermined level, since light has a possibility of being excessively scattered on the surface, visibility of a pattern formed on the surface of the artificial leather may be poor. Therefore, the roughness Ra of the surface of the uneven pattern may be 1.5 μm or less in order to secure visibility.
On the other hand, the light reflection control structure may further include a light scattering structure, and the light scattering structure may include any structure as long as it does not cause the incident light to be specularly reflected but causes the incident light to be scattered (diffuse reflection) so that the reflected light perceived by human eyes becomes less, thereby appearing relatively dark or blurred (shadow) on the pattern. Fig. 2A and 2B are sectional views of a light scattering structure formed on an artificial leather by a release film for manufacturing the artificial leather according to an embodiment of the present invention. As shown in fig. 2A and 2B, representative light scattering structures may include a form having an irregular cross section (fig. 2A) or a form of lenses arranged in a hemispherical shape (fig. 2B). The light scattering structure may also include a moth-eye pattern.
In the present invention, the corresponding release film is formed by adjusting the form, size, and/or arrangement direction of the light reflection structures and/or the form, arrangement direction, etc. of the light scattering structures in the light reflection control structure in the release film, thereby transferring a desired pattern into the artificial leather when manufacturing the artificial leather, and forming the artificial leather including the corresponding desired pattern.
Next, an example of forming a pattern on artificial leather using a release film including a light reflection controlling structure will be described with further reference to fig. 3 and 4. Fig. 3 is an enlarged plan view of a reflection pattern formed on a release film for manufacturing artificial leather according to an embodiment of the present invention. As shown in fig. 1A to 1F, the light reflection structure formed on the surface of the artificial leather by the release film for manufacturing artificial leather according to the embodiment of the present invention may be regular prism-shaped irregularities (fig. 1A) or lens-shaped irregularities (fig. 1E). When the prism-shaped uneven structure is appropriately arranged in the release film, for example, a reflection pattern 30 shown in fig. 3 can be formed. More specifically, the reflection pattern shown in fig. 3 is obtained by dividing a predetermined square into four equal parts, arranging the four isosceles triangles to have the prism-shaped concavities and convexities, and arranging the directions of progression of the prism-shaped concavities and convexities at different angles. The concave-convex structure of fig. 3 is formed by disposing four isosceles triangles at ninety degrees. On a diagonal line 31 that quarters the regular quadrangle, a light scattering structure as shown in fig. 2A-2B may be disposed to maximize the reflection effect of the reflection pattern 30. Artificial leather in which a plurality of such reflection patterns are regularly arranged can be given a glittering effect that glitters according to an angle of human observation, and thus can improve aesthetic sense. The light reflection structure and the light scattering structure may be arranged to realize a reflection pattern, and when the angles of incident light and reflected light are predicted to arrange the arrangement angles of the prism shapes, a pattern that appears stereoscopically may also be realized on the artificial leather.
In addition, the light reflecting structure may be arranged at a portion corresponding to the shape of the letters, thereby forming letters with improved visibility on the surface of the artificial leather. Fig. 4 is a schematic view of a character pattern formed on a release film for manufacturing artificial leather according to an embodiment of the present invention. The text shown in fig. 4 illustrates the detailed structure within the shape of the text formed in the release film. As shown in fig. 4, the text portion may be a light-reflecting structure and the periphery thereof may be a light-scattering structure, or the text portion may be a light-scattering structure and the periphery thereof may be a light-reflecting structure. When a glittering effect is also imparted to characters, the directions of the prism-shaped convexes and concaves or the lens-shaped convexes and concaves may be arranged at various angles.
Next, a specific structure of the release film according to an embodiment of the present invention will be described. Fig. 7 is a schematic cross-sectional view of a release film for manufacturing artificial leather according to an embodiment of the present invention. Fig. 8 is a sectional view showing a state before the artificial leather according to the embodiment of the present invention is separated from the release film.
As shown in fig. 7, the release film may include a base layer 71, a pattern layer 72, and a release layer 73. The base layer may be a single layer, which may include at least one selected from Polystyrene (PS), Polypropylene (PP), polyethylene terephthalate (PET), and polyvinyl chloride (PVC). One surface of the base layer may form a pattern layer forming a pattern to be transferred to the surface of the artificial leather. The pattern layer may be formed on the base layer itself (in the base layer), but it is preferable to form another pattern layer in order to form a fine pattern. The pattern layer has a light reflection control structure formed therein, which can form a pattern to be transferred to the artificial leather. In order to precisely transfer the light reflection control structure having a size of several μm to several hundreds μm on the pattern layer, an ultraviolet curable resin may be used. The ultraviolet light curing resin can be selected from polyurethane, polyacrylate, polyepoxy, polyurethane acrylate, polyester acrylate, polyepoxy acrylate or organosilicon ultraviolet light curing resin. Preferred uv curable resins may include urethane acrylate, epoxy acrylate, polyester acrylate, silicone acrylate resins having (meth) acrylate at the molecular end, epoxy and vinyl curable resins having a molecular end reactive with cations, and the like.
As for the uv curable resin of the pattern layer, those skilled in the art can appropriately select a photo curable resin that can easily form a fine pattern in order to practice the present invention. For example, a photocurable resin composition disclosed in Korean laid-open patent publication No. 10-2014-0111603 (2014.09.19) or the like may be used for the pattern layer.
Various patterns to be formed on the artificial leather are formed on the pattern layer. Therefore, the uneven form can be formed so as to express various patterns, characters, and the like using the light reflection control structure including the light reflection structure and the light scattering structure. When the surface of the pattern layer is uneven, the photocurable resin constituting the pattern layer may be formed by a method such as imprinting or lithography. When an ultraviolet curable resin is used on the pattern layer in order to form a fine pattern, an ultraviolet imprint (imprinting) method may be employed. In the uv imprinting step, a stamp having a pattern may be used, and the surface roughness Ra of the uneven pattern constituting the light reflecting structure formed on the stamp may be 1.5 μm or less in order to improve the taste of the artificial leather as a final product and transfer a desired pattern. In order to precisely control the surface of the uneven pattern constituting the light reflection structure, a material having high hardness, for example, a diamond material blade (bite) can be used.
Therefore, in the embodiment of the present invention, a preferable release film includes a substrate layer, a pattern layer, and a release layer, and a surface of the pattern layer includes a light reflection control structure. As explained earlier, the light reflection control structure included in the surface of the pattern layer is actually a structure corresponding to the light reflection control structure formed on the artificial leather as a final product in a mirror image, strictly speaking, another structure. However, for convenience, in the description of the present invention, both the light reflection control structure included in the pattern layer of the release film and the light reflection control structure formed on the surface of the artificial leather by transferring the pattern layer of the release film are represented as the light reflection control structure. Similarly, hereinafter, the terms referred to as a light reflection structure and a light scattering structure are also construed to mean both a structure formed on the pattern layer of the release film and a structure transferred to the artificial leather.
The light reflection control structure included on the surface of the release film may include a light reflection structure and a light scattering structure, and the light reflection structure may be a structure capable of effectively reflecting incident light, in which a concave-convex structure is regularly arranged, and the concave-convex structure is formed by a combination of one or more kinds of concave-convex structures of a prism form and a similar form thereof (a prism-like form), a lens form and a similar form thereof (a lens-like form), a polygonal pyramid form, a conical cone form, a corner cube form and a similar form thereof (a polygonal pyramid-like form, a conical cone-like form, and a corner cube form). Fig. 9 is an enlarged photograph of a light reflection structure in which the irregularities in the form of prisms are regularly arranged in one example of the present invention. Fig. 10 is an enlarged photograph of a light reflection structure in which the irregularities in the lens form are regularly arranged in one example of the present invention. In addition, the light scattering structure may include any structure as long as it does not reflect the incident light along a predetermined path, but scatters (diffusely reflects) the incident light such that the reflected light perceived by human eyes becomes less, thereby appearing relatively dark or blurred (shadow) on the pattern. Fig. 11 is an enlarged photograph of an example of a light scattering structure having an irregular uneven structure in one example of the present invention. Fig. 12 is an enlarged photograph showing an example of a light scattering structure in which non-standardized hemispheres are arranged in one example of the present invention.
In the present invention, by adjusting the form, size, and/or arrangement direction of the light reflection structures and/or the form and arrangement direction of the light scattering structures, different light reflection control structures can be formed in the pattern layer of the release film, thereby forming a pattern to be transferred onto the artificial leather. Fig. 13 is an enlarged photograph of an example of a rhombus-shaped reflection pattern formed on a release film and having light-reflecting structures and light-scattering structures arranged in an array, according to an example of the present invention. Fig. 14 is an enlarged photograph of another example of a pattern-shaped reflection pattern formed on a release film and having a light reflection structure and a light scattering structure arranged in line according to an embodiment of the present invention.
On the other hand, returning to fig. 7, the release layer 73 functions to enable easy peeling of the resin cured into the artificial leather and the release film. The main component for constituting the release layer may be used without limitation as long as it can achieve the object. When the component constituting the surface layer of the artificial leather is polyurethane, silicone may be used in order to secure releasability. When the component constituting the surface layer of the artificial leather is silicone, a release layer containing a non-silicone compound as a main component can be formed. In particular, when the transferred pattern requires a finer hologram shape, at least one selected from Cr, Al, Ni, Si, and alloys containing the same may be vapor-deposited, and the pattern may be transferred in the form of a hologram
Is formed. When the release layer 20 is used by metal evaporation, when the metal evaporation layer is smaller than
When the metal deposition layer is larger than that of the metal film, the mold release effect may be lowered
The accuracy of the pattern may be affected. The preferable thickness of the metal deposition layer may be a thickness in consideration of optimizing the release effect and the transfer quality
Next, a manufacturing method of forming an artificial leather including a light reflection controlling structure using the release film including a light reflection structure as described above will be specifically described.
Since the light reflection structures are regularly arranged with a predetermined structure, they can be drawn in a linear state with a constant distance (pitch) in an enlarged plan view. On the other hand, the light scattering structure may include any structure as long as it does not reflect the incident light along the predicted path, but scatters the incident light so that the reflected light perceived by the human eye becomes less, thereby appearing relatively dark or blurred (milky & shadow) on the pattern. As shown in fig. 2A and 2B, representative light scattering structures may include a form having an irregular cross section (fig. 2A) or a form of lenses arranged in a hemispherical shape (fig. 2B).
The light reflection structure formed on the pattern layer of the release film according to an embodiment of the present invention may be regular prism-shaped irregularities or lens-shaped irregularities. The prism-shaped concave-convex structure may be appropriately arranged on the surface of the artificial leather to form the reflective pattern 30 to be transferred onto the final product, i.e., the artificial leather.
In addition, the light reflection structure is arranged on the pattern layer of the release film in a character form, so that characters with improved visibility can be transferred to the surface of the artificial leather. The characters shown in fig. 4 may be formed on the pattern layer of the release film according to an embodiment of the present invention, so that the detailed structure of the characters transferred to the artificial leather can be illustrated.
The size of the irregularities of the light reflection structure can also be expressed by the distance between patterns and other variables such as height and cross-sectional angle on the release film, as in the case of artificial leather. For example, in the prism morphology as shown in fig. 1A-1F, the distance between the vertices of the triangle, i.e., the pitch p, may be 5 to 1000 μm. Generally in prism morphology, the height h is determined when determining the pitch and profile angle a. The section angle a may be 5 ° to 170 °. The size of the light reflecting structure may be defined in the present invention as a pitch representing a prism or lens configuration. The size may be defined as the longest base of the polygonal pyramid when the light reflecting structure has a polygonal pyramid form, and as the diameter when the light reflecting structure has a circular cone form. Also, the height may refer to the highest length when a perpendicular line is connected from the bottom surface to the apex.
In particular, when the pattern layer of the release film is formed so that the corner cube pattern shown in fig. 5 can be transferred, a pattern having a retroreflective effect can be realized on the artificial leather.
In the artificial leather including the light reflection controlling structure on the surface, in order to form a pattern for maximizing the light reflection effect to improve visibility, the surface of the concavo-convex form for constituting the light reflecting structure should be flat, and thus the surface of the concavo-convex form for constituting the light reflecting structure of the release film should also be flat. Therefore, the surface roughness (Ra) of the uneven form may be 1.5 μm or less in terms of ensuring visibility.
Production example of Release film
An ultraviolet curable resin was injected between a 100 μm thick PET film (base layer) and a stamp having irregularities forming a light reflection control structure formed thereon, and the stamp was pressed to maintain a constant thickness between the base layer and the stamp. Irradiating the PET surface with 500mJ/cm2After the uv light of (1), the stamp was released, and fine irregularities were formed on the surface of the PET, thereby forming a pattern layer on the PET substrate. And coating organic silicon with the thickness of 0.3-1.0 mu m on the cured pattern layer to form a release layer.
The composition of the uv curable resin of the pattern layer is shown in table 1 below.
TABLE 1
| Distinguishing | By weight% | Remarks for |
| SR259 | ||
| 30 | Ultraviolet light curing | |
| SR348 | ||
| 30 | Ultraviolet light curing monomer | |
| SR351 NS | 10 | Ultraviolet light curing monomer |
| SR506 NS | 25 | Ultraviolet light curing monomer |
| IRGACURE 184 | 3 | Photopolymerization initiator |
| IRGACURE TPO | 2 | Photopolymerization initiator |
| 100 |
Examples of production of Artificial leather
A polyurethane composition prepared by mixing 100 parts by weight of a polyurethane resin with 500 parts by weight of MEK was coated on the manufactured release film using a 200 μm coating bar, and dried in a hot air drying oven at 80 ℃ for 5 minutes to form a polyurethane skin layer of about 20 μm. The coating process was repeated three times to form the thickness of the final polyurethane skin layer to be about 60 μm.
Coating adhesive on the surface layer and laminating non-woven fabric. And then, separating the polyurethane surface layer from the release layer of the release film to obtain the artificial leather.
The obtained artificial leather includes various patterns and characters formed by the light reflection control structure, and the visibility of the patterns and characters is excellent.
Fig. 15 is a photograph of a sports shoe manufactured using artificial leather manufactured using the release film according to the present invention. As shown in fig. 15, in the artificial leather, a large amount of light reflection occurs at a portion corresponding to the light reflection structure in the release film, thereby producing a visual effect brighter than other areas and improving the visibility of the artificial leather.
Industrial applicability
The artificial leather manufactured by the release film for manufacturing artificial leather of the present invention has high visibility and can include beautiful patterns, and thus can be applied to various fields such as clothing, bags, shoes, and the like.
Claims (8)
1. A release film for manufacturing artificial leather, comprising:
a base layer;
a pattern layer formed on the base layer, forming a pattern to be transferred to an artificial leather; and
a release layer formed on the pattern layer,
wherein a light reflection control structure is formed on the surface of the pattern layer.
2. The release film for manufacturing artificial leather according to claim 1,
the light reflection control structure includes a light reflection structure that reflects incident light, the light reflection structure including one or more concave-convex structures selected from the group consisting of prism shapes and prism-like shapes, lens shapes and lens-like shapes, and polygonal-pyramid shapes, conical shapes and corner-cube shapes and polygonal-pyramid-like shapes, conical shapes and corner-cube-like shapes.
3. The release film for manufacturing artificial leather according to claim 2,
the light reflection structure is formed by regularly arranging the concave-convex structure.
4. The release film for manufacturing artificial leather according to claim 2,
the size of the concave-convex structure is 5-1000 mu m.
5. The release film for manufacturing artificial leather according to claim 2,
the surface roughness Ra of the surface for reflecting light in the light reflection structure is less than or equal to 1.5 mu m.
6. The release film for manufacturing artificial leather according to any one of claims 1 to 5,
the light reflection control structure further includes a light scattering structure that scatters incident light.
7. The release film for manufacturing artificial leather according to claim 6,
the light scattering structure includes one or more structures selected from a moth-eye morphology, an irregular concavo-convex morphology, and a hemispherical array morphology.
8. The release film for manufacturing artificial leather according to claim 1,
the light reflection control structure is made of ultraviolet light curing resin.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020190107704A KR20210026641A (en) | 2019-08-30 | 2019-08-30 | Artificial Leather and Release Film for manufacturing thereof |
| KR10-2019-0107704 | 2019-08-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112522959A true CN112522959A (en) | 2021-03-19 |
| CN112522959B CN112522959B (en) | 2023-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921852227.3U Active CN211947686U (en) | 2019-08-30 | 2019-10-31 | Release film for manufacturing artificial leather |
| CN201911049385.XA Active CN112522959B (en) | 2019-08-30 | 2019-10-31 | Release film for manufacturing artificial leather |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921852227.3U Active CN211947686U (en) | 2019-08-30 | 2019-10-31 | Release film for manufacturing artificial leather |
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| KR (1) | KR20210026641A (en) |
| CN (2) | CN211947686U (en) |
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| KR20210026641A (en) * | 2019-08-30 | 2021-03-10 | (주)케이에프엠 | Artificial Leather and Release Film for manufacturing thereof |
| KR20230018585A (en) * | 2021-07-30 | 2023-02-07 | (주)케이에프엠 | Composition for resin layer of release film, release film, manufacturing method for same and manufacturing method for synthetic leather using same |
| KR20230130347A (en) * | 2022-03-03 | 2023-09-12 | (주)케이에프엠 | Release film, manufacturing method for same and manufacturing method for artificial leather using same |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102666094A (en) * | 2009-12-30 | 2012-09-12 | 乐金华奥斯株式会社 | Release film and method for manufacturing the same |
| TWI555636B (en) * | 2015-05-12 | 2016-11-01 | ming-xian Yao | Leather products with the release film |
| JP2018065306A (en) * | 2016-10-20 | 2018-04-26 | 株式会社加平 | Patterned sheet and method for producing patterned sheet |
| CN108215557A (en) * | 2018-02-01 | 2018-06-29 | 东莞市博扬包装材料有限公司 | Heat transfer film and its moulding process with concave-convex sense |
| CN211947686U (en) * | 2019-08-30 | 2020-11-17 | 凯仁精密材料有限公司 | Release film for manufacturing artificial leather |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3098799U (en) | 2003-06-25 | 2004-03-11 | 林 博恵 | Simulated bait box |
| KR20180104844A (en) | 2017-03-14 | 2018-09-27 | 안현주 | Dog food using fish internal water |
-
2019
- 2019-08-30 KR KR1020190107704A patent/KR20210026641A/en not_active Application Discontinuation
- 2019-10-31 CN CN201921852227.3U patent/CN211947686U/en active Active
- 2019-10-31 CN CN201911049385.XA patent/CN112522959B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102666094A (en) * | 2009-12-30 | 2012-09-12 | 乐金华奥斯株式会社 | Release film and method for manufacturing the same |
| TWI555636B (en) * | 2015-05-12 | 2016-11-01 | ming-xian Yao | Leather products with the release film |
| JP2018065306A (en) * | 2016-10-20 | 2018-04-26 | 株式会社加平 | Patterned sheet and method for producing patterned sheet |
| CN108215557A (en) * | 2018-02-01 | 2018-06-29 | 东莞市博扬包装材料有限公司 | Heat transfer film and its moulding process with concave-convex sense |
| CN211947686U (en) * | 2019-08-30 | 2020-11-17 | 凯仁精密材料有限公司 | Release film for manufacturing artificial leather |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20210026641A (en) | 2021-03-10 |
| CN112522959B (en) | 2023-05-09 |
| CN211947686U (en) | 2020-11-17 |
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