CN112522959B - Release film for manufacturing artificial leather - Google Patents
Release film for manufacturing artificial leather Download PDFInfo
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- CN112522959B CN112522959B CN201911049385.XA CN201911049385A CN112522959B CN 112522959 B CN112522959 B CN 112522959B CN 201911049385 A CN201911049385 A CN 201911049385A CN 112522959 B CN112522959 B CN 112522959B
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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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- 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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- 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
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- 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 the artificial leather; and a release layer formed on the pattern layer, wherein a light reflection control structure is formed on a surface of the pattern layer. After the release film with the structure is used for manufacturing the artificial leather, other printing or gravure printing procedures are not needed, and the visibility of complex figures or characters to be emphasized on the artificial leather can be maximized.
Description
Technical Field
The present invention relates to a release film for manufacturing artificial leather, and more particularly, to a release film which can manufacture artificial leather including various patterns having high visibility.
Background
The background art to the invention is provided herein and is not necessarily a well-known technology.
The typical artificial leather is manufactured by forming a leather film with a synthetic resin such as PVC or PU (polyurethane) on a release paper having leather lines or other predetermined lines, and then bonding a fabric or a woven or non-woven fabric using an adhesive. At this time, when forming a pattern such as a figure 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 release paper used in the manufacturing process of polyurethane synthetic leather forms a synthetic resin layer such as polyethylene on a paper face material, and presses the synthetic resin layer using a mold formed with a desired grain so as to form leather grain or embossing (emboss). Since the synthetic resin layer formed by pressing should be peeled off after transferring the grain on PVC or PU for forming the artificial leather, the treatment is performed with a mold release agent such as silicone.
On the other hand, in the case of representing a grain on artificial leather, in order to form a finer pattern, a film or paper is used as a base layer, and a photocurable composition is used as a synthetic resin layer formed on the base layer. However, when the photocurable composition is used, there are many cases where the lines formed on the surface of the transferred artificial leather are not sufficiently reflective of light, blurring of the lines to be emphasized, and the like, and there is a limitation in ensuring visibility.
Therefore, in general, there is a problem in that, when a complicated pattern, such as a complicated figure or character, is expressed in a plentiful and fine pattern on an artificial leather, it is necessary to introduce another printing process or to use a method of forming a gravure.
Disclosure of Invention
The present invention aims at forming artificial leather pattern with light reflection controlling structure for controlling the direction and amount of reflected light and properly arranging the light reflection controlling structure to form complicated pattern.
Specifically, the light reflection control structure may employ a light reflection structure and/or a light scattering structure, which are appropriately arranged to form a pattern of complicated textures or characters or the like.
In addition, the present invention has an object to precisely control the surface on which the irregularities of the light reflecting structure are formed to improve the visibility of the pattern formed on the artificial leather.
However, the objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned will 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 the artificial leather; and a release layer formed on the pattern layer, wherein a surface of the pattern layer forms a light reflection control structure.
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 (lens) 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, a cone-like shape and a corner cube-like shape.
In some embodiments, the light reflecting structure is formed by regularly arranging the concave-convex structures.
In certain embodiments, the relief structure has a size of 5 to 1000 μm.
In some embodiments, the surface roughness Ra of the 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, an irregular concave-convex morphology, a hemispherical array morphology.
Advantageous effects
The release film with the structure can be used for manufacturing artificial leather, and complex patterns or characters can be formed on the artificial leather. In addition, after the artificial leather is manufactured, other printing or gravure processes are not required, and the visibility of complex figures or characters to be emphasized can be maximized.
Drawings
Fig. 1A to 1F are cross-sectional views showing a light reflecting 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 letter 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 a light reflecting structure formed on a release film according to an embodiment of the present invention.
Fig. 7 is a cross-sectional view showing the structure of a release film according to an embodiment of the present invention.
Fig. 8 is a cross-sectional view showing a state before separation of an artificial leather and a release film according to an embodiment of the present invention.
Fig. 9 is an enlarged photograph showing a light reflection structure in which irregularities in a prism form are regularly arranged in one embodiment of the present invention.
Fig. 10 is an enlarged photograph showing a light reflecting structure in which irregularities in a lens form are regularly arranged in one embodiment of the present invention.
Fig. 11 is an enlarged photograph showing an example of a light scattering structure including a non-standard uneven structure in an embodiment of the present invention.
Fig. 12 is an enlarged photograph showing a light scattering structure in which a non-standardized hemispherical shape is arranged in an embodiment of the present invention.
Fig. 13A and 13B are enlarged photographs showing an example of a diamond-shaped reflection pattern formed on a photographic release film according to an embodiment of the present invention, the diamond-shaped reflection pattern being made by arranging light reflection structures and light scattering structures.
Fig. 14A and 14B are enlarged photographs showing another example of a figure-shaped reflection pattern formed on a photographic release film according to an embodiment of the present invention, the figure-shaped reflection pattern being made of an arrangement of light reflection structures and light scattering structures.
Fig. 15 is a photograph of an athletic shoe manufactured using an artificial leather manufactured using a release film according to the present invention.
Reference numerals
30: reflection pattern
31: light scattering structure
70: release film
71: substrate layer
72: pattern layer
73: release layer
80: resin layer
83: adhesive layer
84: fabric
90: artificial leather
Detailed Description
In the following, 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 is defined by the scope of the appended claims. Unless otherwise indicated, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art.
Throughout this specification and the claims, unless otherwise indicated, the term "comprise (comprise, comprises, comprising)" is intended to cover the referenced product, step or group of products and steps without excluding any other product, step or group of products or group of steps. On the other hand, the various embodiments and examples of the present invention may be combined with any of the other various examples except where explicitly stated to the contrary. In particular, any feature indicated as being preferred or advantageous may be combined with other features.
In one embodiment of the present invention, a release film is provided that is required for manufacturing an artificial leather including various patterns on a surface. One embodiment of the present invention relates to a release film for manufacturing artificial leather, comprising a light reflection control structure, such that the manufactured artificial leather comprises a pattern formed by disposing the light reflection control structure.
Human vision can be thought of as the process of perceiving visible light reflected from the surface of a thing and entering our eyes. Therefore, the release film for manufacturing artificial leather according to an embodiment of the present invention has a structure for controlling light stimulating human vision 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 according to the intention 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 mirror image of the light reflection control structure formed on the artificial leather as the final product. However, for convenience, in the description of the present invention, 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 the transfer of the pattern layer of the release film are both represented as light reflection control structures. Also, the terms called a light reflecting structure and a light scattering structure as described later are also interpreted to mean both a structure formed on a release film and a structure transferred to 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 include a light reflection structure. The light reflecting structure is capable of reflecting incident light, and is capable of effectively reflecting the incident light according to purpose. The light reflection structure may include at least one of a regular prism shape and a prism-like shape, a lens shape and a lens-like shape, a polygonal pyramid shape, a cone shape or a corner cube and a concave-convex structure of a polygonal pyramid-like shape, a cone-like shape or a corner cube, and when forming the pattern of the artificial leather, a combination of one or more light reflection structures selected from a plurality of light reflection structures may be used, and the light reflection structure may be composed of one or more of the concave-convex structures.
Fig. 1A to 1F are cross-sectional views of light reflecting structures 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 concave-convex structures of a prism shape or a prism-like shape. For example, as shown in fig. 1A, the prism shape includes a triangular prism whose cross-sectional shape is a regular triangle or an isosceles triangle and whose surface is flat. As shown in fig. 1B to 1D, the prism-like shape includes a shape in which the cross-section is in the shape of a vertex of a cut triangle (fig. 1C) or a shape in which the vertex is arc-like (fig. 1D). As shown in fig. 1B, a form in which triangular cross sections are regularly spaced is also included in the prism-like form. As shown in fig. 1E and 1F, the light reflection structure may be formed by a concave-convex structure in which concave-convex of a lens form are regularly arranged. Although the lens-like morphology, the polygonal pyramid morphology, the conical morphology and the corner cube and the polygonal pyramid-like morphology, the conical morphology and the corner cube are not shown in fig. 1A to 1F, the structures thereof may be determined and arranged in comparison with the prism morphology, and the prism-like morphology and the lens morphology shown in fig. 1A to 1F. In the following description, the prism-like shape, the lens-like shape, the polygonal pyramid-like shape, the conical-like shape, and the corner-like prism are also referred to as a prism shape, a lens shape, a polygonal pyramid shape, a conical shape, and the like of the corner-like prism.
In the light reflection structure, when the irregularities in the form of prisms are regularly arranged, in general, an enlarged plan view can be drawn in the form of straight lines spaced at a certain interval (pitch). However, when the concave-convex structures of the prism or prism-like morphology are regularly arranged, the locus of the peaks can be expressed as a ripple or the like, which is exemplarily shown in fig. 6A and 6B.
The size of the relief of the light reflecting structure may be expressed in terms of the spacing between the figures 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 the prism morphology, the height h is determined when determining the pitch and the section angle a. The section angle a may be 5 ° to 170 °. In the present invention, the size of the light reflecting structure may be expressed by the pitch and height between the regularly arranged concave-convex structures. For example, the light reflecting structure size (pitch) may be defined as the pitch representing the 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 it is a conical shape, it may be defined as the diameter. In addition, height may refer to the highest length when connecting perpendicular lines from bottom edge to top edge (e.g., top to bottom edge height).
In addition, as the light reflection structure, when the irregularities of the polygonal pyramid shape or the corner cube shape and the polygonal pyramid-like shape or the corner cube-like shape are formed on the surface of the artificial leather, a retroreflective effect (retroreflective effect) can be obtained. Fig. 5 is a schematic view showing 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 form shown in fig. 5 has an effect of emphasizing a desired pattern when light is irradiated as a structure capable of reflecting a track of light in an incident direction. Therefore, even if other beads (beads) or the like are not formed to impart the retroreflective effect, the same or similar effect can be exhibited, and the manufacturability of the artificial leather having the retroreflective effect can be improved. In addition, since the dropping of beads (beads) or the like conventionally used for imparting a retroreflective effect is prevented, durability of the retroreflective effect can be improved.
In forming the artificial leather including the light reflection control structure, in order to form a pattern that maximizes the light reflection effect to improve visibility, the surface constituting the concave-convex shape of the light reflection structure should be flat. That is, when the roughness value of the surface of the concave-convex form as a portion for reflecting light exceeds a prescribed 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 ensure visibility.
On the other hand, the light reflection control structure may further include a light scattering structure, which may include any structure as long as it does not specularly reflect incident light but scatters (diffusely reflects) so that reflected light perceived by the human eye becomes small, thereby appearing relatively dark or blurred (milky & shadow) on the pattern. Fig. 2A and 2B are cross-sectional views of light scattering structures formed on an artificial leather by a release film for manufacturing an artificial leather according to an embodiment of the present invention. As shown in fig. 2A and 2B, a representative light scattering structure may include a form in which a cross section is irregular (fig. 2A) or a form in which lenses of hemispherical surfaces are arranged (fig. 2B). In addition, the light scattering structure may also include a moth-eye morphology.
In the present invention, the corresponding release film is formed by adjusting the form, size, and/or arrangement direction of the light reflection structure and/or the form, arrangement direction, etc. of the light scattering structure in the light reflection control structure in the release film, thereby transferring a desired pattern into the artificial leather when the artificial leather is manufactured, to form the artificial leather including the corresponding desired pattern.
Next, an example of forming a pattern on the artificial leather using a release film including a light reflection control structure is 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 using the release film for manufacturing the artificial leather according to an embodiment of the present invention may be a regular prism-shaped concave-convex (fig. 1A) or a lens-shaped concave-convex (fig. 1E). When the prism-shaped concave-convex structure is properly arranged in the release film, a reflection pattern 30 shown in fig. 3, for example, 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 concave-convex shape of a prism, and arranging the directions in which the concave-convex shape of the prism is formed at different angles. The concave-convex structure of fig. 3 is configured by arranging four isosceles triangles at ninety degrees, respectively. On the diagonal line 31 dividing the regular quadrangle into four, a light scattering structure as shown in fig. 2A to 2B may be arranged to maximize the reflection effect of the reflection pattern 30. The artificial leather in which a plurality of such reflection patterns are regularly arranged may be given a sparkling effect (glittering) that blinks according to the angle of human observation, and thus may improve aesthetic feeling. The light reflecting structure and the light scattering structure may be arranged to realize a reflection pattern, and when the angles of the incident light and the reflected light are predicted to arrange the arrangement angles of the prism forms, a pattern of three-dimensional appearance 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 letter, thereby forming the letter with improved visibility on the surface of the artificial leather. Fig. 4 is a schematic diagram of a letter pattern formed on a release film for manufacturing an artificial leather according to an embodiment of the present invention. The text shown in fig. 4 illustrates the detailed structure within the text shape formed in the release film. As shown in fig. 4, the letter portion may be a light reflecting structure and its periphery may be a light scattering structure, or the letter portion may be a light scattering structure and its periphery may be a light reflecting structure. When a flashing effect is also given to the character, the directions of the concave-convex shapes of the prism form or the concave-convex shapes of the lens form 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 cross-sectional view showing a state before separation of an artificial leather and a release film according to an embodiment of the present invention.
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, and may include at least one selected from Polystyrene (PS), polypropylene (PP), polyethylene terephthalate (PET), and polyvinyl chloride (PVC). A surface of the base layer may form a pattern layer, which forms 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, and the reflection control structure may form a pattern to be transferred to the artificial leather. In order to precisely transfer a light reflection control structure having a size of several μm to several hundreds of 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 acrylic, polyester acrylic 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 terminals, epoxy and vinyl curable resins, and the like, the molecular terminals of which are capable of reacting with cations.
Regarding the ultraviolet light curable resin of the pattern layer, for the practice of the present invention, a person skilled in the art can appropriately select a light curable resin which is easy to form a fine pattern. For example, a photocurable resin composition disclosed in korean laid-open patent publication No. 10-2014-011603 (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 concave-convex pattern 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 roughened, the photocurable resin constituting the pattern layer may be embossed or lithographically printed. When an ultraviolet curable resin is used on the pattern layer in order to form an elegant pattern, an ultraviolet imprinting (printing) method may be employed. In the ultraviolet imprinting step, a stamp having a pattern formed thereon 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 enhance the taste of the artificial leather as a final product and transfer the desired pattern. In order to precisely control the surface of the concave-convex pattern constituting the light reflecting structure, a material having high hardness, such as a diamond material blade (bit), may be used.
Thus, in an embodiment of the present invention, a preferred release film comprises a base layer, a pattern layer, a release layer, and the surface of the pattern layer comprises light reflection control structures. As described above, the light reflection control structure included in the surface of the pattern layer is actually a structure corresponding to the mirror image of the light reflection control structure formed in the artificial leather as the final product, and is strictly 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 transfer of the pattern layer of the release film are referred to as light reflection control structures. In the same manner, the terms called light reflecting structure and light scattering structure are also interpreted as representing both the structure of the pattern layer formed on the release film and the structure transferred to the artificial leather.
The light reflection control structure included in 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, and the concave-convex structure may be formed by regularly arranging concave-convex structures formed of one or more of a prism shape and a similar shape (prism-like shape), a lens shape and a similar shape (lens-like shape), a polygonal pyramid shape, a conical shape, a corner cube shape and a similar shape (polygonal pyramid-like shape, conical shape and corner cube-like shape). Fig. 9 is an enlarged photograph of a light reflecting structure in which irregularities in a prism form are regularly arranged in an embodiment of the present invention. Fig. 10 is an enlarged photograph of a light reflecting structure in which irregularities in the form of photographing lenses are regularly arranged in one embodiment of the present invention. In addition, the light scattering structure may include any structure as long as it does not reflect incident light along a predetermined path, but scatters (diffusely reflects) such that reflected light perceived by the human eye becomes small, thereby appearing relatively dark or blurred (milky & shadow) on the pattern. Fig. 11 is an enlarged photograph of an example of a light scattering structure having an irregular structure, in an embodiment of the present invention. Fig. 12 is an enlarged photograph of an example of a light scattering structure in which non-standardized hemispheres are arranged, in an embodiment of the present invention.
In the invention, different light reflection control structures can be formed in the pattern layer of the release film by adjusting the shape and size of the light reflection structure and/or the arrangement direction and/or the shape and arrangement direction of the light scattering structure, so that the pattern to be transferred onto the artificial leather is formed. Fig. 13 is an enlarged photograph of an example of a diamond-shaped reflective pattern formed on a release film and made of an arrangement of light reflecting structures and light scattering structures according to an embodiment of the present invention. Fig. 14 is an enlarged photograph of another example of a riffled-shaped reflection pattern formed on a release film and made of an arrangement of light reflection structures and light scattering structures according to an embodiment of the present invention.
On the other hand, returning to fig. 7, the release layer 73 functions to enable the resin and the release film cured into the artificial leather to be easily peeled off. 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 ensure peelability. When the component constituting the surface layer of the artificial leather is an organosilicon, a release layer containing a non-organosilicon compound as a main component can be formed. In particular, when the transferred pattern requires a finer shape of the hologram, at least one selected from Cr, al, ni, si and alloys including the same may be vapor deposited and may be
Is formed of a thickness of (a). When the release layer 20 is used by metal vapor deposition, the metal vapor deposition layer is less than +.>
In the case where the release effect is possibly lowered, and in the case where the metal deposition layer is more than +.>
At this time, the accuracy of the pattern may be affected. The preferable thickness of the metal deposition layer may be +.>
Next, a method of manufacturing an artificial leather including a light reflection control structure using the release film including a light reflection structure as described above is specifically described.
Since the light reflecting structures are regularly arranged in a predetermined arrangement, the light reflecting structures can be drawn in a straight line form separated by a certain 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 incident light along a predicted path, but scatters so that reflected light perceived by the human eye becomes small, thereby appearing relatively dark or blurred (milky & shadow) on the pattern. As shown in fig. 2A and 2B, a representative light scattering structure may include a form in which a cross section is irregular (fig. 2A) or a form in which lenses of hemispherical surfaces are arranged (fig. 2B).
The light reflection structure formed on the pattern layer of the release film according to an embodiment of the present invention may have regular prism-shaped irregularities or lens-shaped irregularities. The prismatic relief structure may be suitably arranged on the surface of the artificial leather to form the reflective pattern 30 to be transferred to the final product, i.e. the artificial leather.
In addition, the light reflecting 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 text shown in fig. 4 may be formed in the pattern layer of the release film according to an embodiment of the present invention, so that the detailed structure of the text transferred to the artificial leather may be illustrated.
Like artificial leather, the size of the irregularities of the light reflecting structure can also be expressed by the distance between figures and other variables (e.g., height and cross-sectional angle) on the release film. For example, in the prismatic configuration shown in fig. 1A-1F, the distance between the vertices of the triangle, i.e., pitch p, may be 5 to 1000 μm. Typically in prism morphology, the height h is determined when determining the pitch and the section 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 the pitch representing the morphology of the prisms or lenses. When the light reflecting structure is in the form of a polygonal pyramid, the size may be defined as the longest base of the polygonal pyramid, and when it is in the form of a cone, the diameter may be defined. And, the height may refer to the highest length when connecting the vertical line from the bottom surface to the vertex.
In particular, when the pattern layer of the release film is formed so that the corner cube shape 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 control structure on the surface, in order to form a pattern that maximizes the light reflection effect to improve visibility, the surface of the concave-convex form for constituting the light reflection structure should be flat, and thus the surface of the concave-convex form for constituting the light reflection structure of the release film should also be flat. Therefore, the surface roughness (Ra) of the concave-convex pattern may be 1.5 μm or less in order to secure visibility.
Production example of Release film
An ultraviolet curable resin was injected between a PET film (base layer) having a thickness of 100 μm and a stamper having irregularities constituting a light reflection control structure formed thereon, and the stamper was pressurized to maintain a constant thickness between the base layer and the stamper. Irradiation of PET surface with 500mJ/cm 2 After uv light of (a), the stamp was released and fine irregularities were formed on the surface of PET, thereby forming a pattern layer on the PET substrate. And coating the cured pattern layer with organosilicon with the thickness of 0.3-1.0 mu m to form a release layer.
The composition of the uv curable resin of the pattern layer is shown in table 1 below.
TABLE 1
| Differentiation of | Weight | Remarks |
| SR259 | ||
| 30 | Ultraviolet light solidifying | |
| SR348 | ||
| 30 | Ultraviolet light solidifying monomer | |
| SR351 NS | 10 | Ultraviolet light solidifying monomer |
| SR506 NS | 25 | Ultraviolet light solidifying monomer |
| IRGACURE 184 | 3 | Photopolymerization initiator |
| IRGACURE TPO | 2 | Photopolymerization initiator |
| 100 |
Example of production of Artificial leather
The polyurethane composition prepared by mixing 100 parts by weight of the polyurethane resin with 500 parts by weight of MEK was coated on the release film manufactured 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, thereby forming the thickness of the final polyurethane skin layer to about 60 μm.
And coating an adhesive on the surface layer and laminating a non-woven fabric. And then separating the polyurethane surface layer from the release layer of the release film, thereby obtaining 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 an athletic shoe manufactured using an artificial leather manufactured using a release film according to the present invention. As shown in fig. 15, the light reflection structure in the release film is formed to have a larger light reflection area than the other areas, and thus the visual effect of the artificial leather is brighter than the other areas, and the visibility of the artificial leather is improved.
Industrial applicability
The artificial leather manufactured by using the release film for manufacturing artificial leather according to the present invention has high visibility and may include beautiful patterns, and thus may be applied to various fields such as clothing, luggage, footwear, and the like.
Claims (4)
1. A release film for use in the manufacture of artificial leather, comprising:
a base layer;
a pattern layer formed on the base layer, forming a pattern to be transferred to the 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,
wherein the light reflection control structure includes a light reflection structure that reflects incident light, the light reflection structure includes one or more of concave-convex structures selected from a prism shape and a prism-like shape, a lens shape and a lens-like shape, and a polygonal pyramid shape, a cone shape and a corner cube shape and a polygonal pyramid-like shape, a cone-like shape and a corner cube-like shape,
the light reflecting structure is formed by regularly arranging the concave-convex structures,
the size of the concave-convex structure is 5-1000 mu m,
the surface roughness Ra of the surface for reflecting light in the light reflecting structure is 1.5 μm or less.
2. The release film for manufacturing artificial leather according to claim 1, wherein,
the light reflection control structure further includes a light scattering structure that scatters incident light.
3. A release film for manufacturing artificial leather according to claim 2, wherein,
the light scattering structure includes one or more selected from a moth-eye morphology, an irregular concave-convex morphology, and a hemispherical array morphology.
4. The release film for manufacturing artificial leather according to claim 1, wherein,
the light reflection control structure is composed 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 CN112522959A (en) | 2021-03-19 |
| CN112522959B true 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 |
Family Applications Before (1)
| 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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| Country | Link |
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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 |
| CN211947686U (en) | 2020-11-17 |
| CN112522959A (en) | 2021-03-19 |
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