KR102178366B1 - Double-sided adhesive film having embossed pattern adhesive layer - Google Patents

Abstract

The present invention relates to a double-sided adhesive film having an embossed pattern adhesive layer, according to the present invention, the base film; A flat adhesive layer formed on one surface of the base film; It is possible to provide a double-sided adhesive film having an embossed pattern adhesive layer including an embossed pattern adhesive layer formed to have an embossed pattern on the other surface of the base film, and a release film attached to one surface of the flat adhesive layer and the other surface of the embossed pattern adhesive layer, respectively. .

Description

Double-sided adhesive film having embossed pattern adhesive layer

The present invention relates to a double-sided adhesive film having an embossing pattern adhesive layer, and more particularly, by forming an embossed pattern on the adhesive layer attached to an adherend, air is easily discharged during construction, improving ease of construction and embossing with no residue. It relates to a double-sided adhesive film having a patterned adhesive layer.

Double-sided adhesive films are widely used to attach printing paper on which various patterns and designs are printed on the exterior of buildings, interiors, and advertisements.

Existing double-sided adhesive films have a structure in which a strong adhesive with strong adhesive strength is applied on both sides, and the printed paper is adhered to one side and then the other side is attached to the adherend.

When the conventional film is attached to an adherend such as a glass window, bubbles are easily formed between the film and the adherend, and it is difficult to remove the generated bubbles.

When such bubbles are formed, adhesive strength decreases over time, and there is a problem that is not good in terms of aesthetics. Therefore, construction experts or ordinary people require considerable attention and effort to construct so that bubbles do not remain.

In order to remove air bubbles, a method of scratching the film was used, but this had a problem in that the scratched portion spreads over time, resulting in a defect.

In addition, when the film is removed later, there is a problem that there is a high possibility that a residue in which the pressure-sensitive adhesive is transferred to the adherend occurs.

Therefore, it is necessary to develop a film that is easy to construct and does not leave a residue because air is easily removed between the adherend and the film.

In order to solve the above problems, the present invention provides a double-sided adhesive film having an embossed-pattern adhesive layer having no residual residue by forming an embossed pattern on the adhesive layer attached to the adherend to facilitate air discharge during construction. There is a purpose to provide.

In order to solve the above problems, a double-sided adhesive film having an embossed pattern adhesive layer according to an embodiment of the present invention includes a base film; A flat adhesive layer formed on one surface of the base film; It is possible to provide a double-sided adhesive film having an embossed pattern adhesive layer including an embossed pattern adhesive layer formed to have an embossed pattern on the other surface of the base film, and a release film attached to one surface of the flat adhesive layer and the other surface of the embossed pattern adhesive layer, respectively. .

In addition, the base film is a film composed of one of polyolefin, polyvinyl chloride, polypropylene (PP), polyethylene terephthalate (PET), polystyrene, polymethacrylate, and polycarbonate, or a composite film composed of two or more types. do.

In addition, at least one of the flat adhesive layer and the embossed pattern adhesive layer is characterized in that it comprises one of a silicone-based resin, a polyurethane-based resin, an acrylic resin, an olefin-based ethylene-vinyl acetate-based resin, and an epoxy-based resin.

In addition, at least one of the flat adhesive layer and the embossed pattern adhesive layer may further include an adhesion promoter that is at least one of maleic anhydride polymerized polypropylene and silane-based resin.

In addition, the embossed pattern adhesive layer is characterized in that the pressure-sensitive adhesive is filled in an intaglio pattern roll and transferred to the base film when the base film passes between the pattern roll and the rubber roll, and is shaped in an embossed form to have an embossed pattern.

In addition, the embossed pattern adhesive layer may further include gypsum, potassium sulfate, and disodium succinate.

In addition, the embossed pattern adhesive layer may further include alginic acid, hyaluronic acid, and chitin.

In addition, the embossed pattern adhesive layer may further include phenoxyethyl acrylate and phenyl maleimide.

The double-sided adhesive film having the embossed pattern adhesive layer according to the embodiment of the present invention as described above may form an embossed pattern on the adhesive layer attached to the adherend, thereby exhibiting an air-free function when attaching the film to the adherend.

Accordingly, when the film is attached, air is easily discharged according to the emboss pattern of the embossed pattern adhesive layer, so that the air bubble layer does not locally remain between the film and the adherend, thereby increasing adhesion and improving ease of construction.

In addition, when the film is removed from the adherend later, the residue can be removed cleanly without remaining.

1 is a cross-sectional view schematically showing a double-sided adhesive film having an embossed pattern adhesive layer according to an embodiment of the present invention.
2 is an exemplary view showing a relief patterning process for forming an embossed pattern adhesive layer of a double-sided adhesive film having an embossed pattern adhesive layer according to an embodiment of the present invention.
3 is an exemplary view showing an emboss pattern of the emboss pattern adhesive layer of a double-sided adhesive film having an emboss pattern adhesive layer according to an embodiment of the present invention.

Hereinafter, the description of the present invention with reference to the drawings is not limited to a specific embodiment, and various transformations may be applied and various embodiments may be provided. In addition, the content described below should be understood to include all conversions, equivalents, and substitutes included in the spirit and scope of the present invention.

In the following description, terms such as first and second are terms used to describe various elements, and their meanings are not limited thereto, and are used only for the purpose of distinguishing one element from other elements.

The same reference numbers used throughout this specification denote the same elements.

Singular expressions used in the present invention include plural expressions unless the context clearly indicates otherwise. In addition, terms such as "include", "include" or "have" described below are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification. It is to be construed and not to preclude the possibility of the presence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 3.

1 is a cross-sectional view schematically showing a double-sided adhesive film having an embossed pattern adhesive layer according to an embodiment of the present invention, and FIG. 2 is a double-sided adhesive film having an embossed pattern adhesive layer according to an embodiment of the present invention. It is an exemplary diagram showing the embossed patterning process of forming a layer, and FIG. 3 is an exemplary view showing the emboss pattern of the embossed pattern adhesive layer of the double-sided adhesive film having the embossed pattern adhesive layer according to an embodiment of the present invention.

1, a double-sided adhesive film 1 having an embossed pattern adhesive layer according to an embodiment of the present invention includes a base film 10, a flat adhesive layer 20, an embossed pattern adhesive layer 30, and a release film ( 40) may be included.

First, the base film 10 is a film composed of one of polyolefin, polyvinyl chloride, polypropylene (PP), polyethylene terephthalate (PET), polystyrene, polymethacrylate, and polycarbonate (PC), or a composite film composed of two or more types. Film may be, but is not limited thereto, triacetyl cellulose (TAC), polyethersulfone, polyacrylic resin, polyurethane resin, polyester, polysulfone, polymethylpentene, polyether ketone, diacetylene cellulose, acetate butyl It may be made of a plastic film such as late cellulose and (meth)acryl nitrile.

In addition, the base film 10 may be formed by including 5 to 30 parts by weight of TPAE (Thermoplastic Polyamide Elastomers) based on 100 parts by weight of polyethylene terephthalate (PET) or polycarbonate (PC).

At this time, when the blending amount of TPAE is less than 5 parts by weight, the effect on the moldability of polyethylene terephthalate (PET) or polycarbonate (PC) may be insignificant, and when it exceeds 30 parts by weight, polyethylene terephthalate (PET) or polycarbonate Due to poor compatibility with (PC), the flexibility of the base film 10 may be reduced.

When the base film 10 is provided as a plastic film, it may be formed by mixing ceramics.

This is to form a hydrophobic surface that excludes moisture and to compensate for the characteristics of a plastic having poor ventilation. By adding a ceramic to the plastic film, a plastic film having excellent strength and improved hydrophilicity and breathability may be provided.

Here, the ceramic may be provided with one of silicon dioxide, titanium dioxide, mica, clay, loess, and zeolite.

In addition, the ratio of the plastic film, the ceramic, and the compatibilizer may be mixed in a ratio of 8:1:1 to 5:4:1. (The compatibilizer always maintains a ratio of 1, and the closer it is to a ratio of 5:4:1, the better the hydrophilicity and breathability are formed)

In addition, ceramics may be formed to contain silver before mixing with plastics in order to add antibacterial properties.

That is, the plastic film formed by mixing ceramics may improve not only hydrophilicity and breathability, but also antibacterial properties.

Through this, when the base film 10 is formed of a plastic film, the flat adhesive layer 20 and the embossed pattern adhesive layer 30 may be better formed.

Such a base film 10 is preferably formed to a thickness of 20 μm to 250 μm to form the flat adhesive layer 20 and the embossed pattern adhesive layer 30, and it is preferable to withstand a certain force applied upon removal. Do.

The flat adhesive layer 20 is a layer formed in the form of a plane on one side of the base film 10, and a release film 40 may be attached to one side.

Accordingly, when the release film 40 is removed, various patterns, designs, etc. may be attached to the printed paper.

The flat adhesive layer 20 may be made of a pressure-sensitive adhesive, and the pressure-sensitive adhesive may include one of a silicone-based resin, a polyurethane-based resin, an acrylic resin, an olefin-based ethylene-vinyl acetate-based resin, and an epoxy-based resin, but is not limited thereto. Does not.

In addition, the flat adhesive layer 20 may further include an adhesion promoter, which is one or more of maleic anhydride polymerized polypropylene and silane-based resin.

The adhesion promoter may contain 8 to 15 parts by weight in 100 parts by weight of the adhesive. If the adhesion promoter is less than 8 parts by weight, the effect of improving the adhesion of the flat adhesive layer 20 is insignificant, and if it exceeds 15 parts by weight, the adhesion promoter This is because it may deteriorate or precipitate and appear as foreign matter.

That is, an adhesion promoter is further included in the flat adhesive layer 20 having an adhesive function, so that the adhesive strength of the flat adhesive layer 20 can be improved, and thus, adhesion to the base film 10 and adhesion to printing paper, etc. It can be improved.

In addition, the flat adhesive layer 20 may further include a hydrazine derivative when the adhesive is an acrylic resin.

The hydrazine derivative crosslinks with diacetone acrylamide of acrylic to form the flat adhesive layer 20 densely, thereby improving the adhesion between the flat adhesive layer 20 and the base film 10, improving adhesion and improving water resistance. have.

At this time, the hydrazine derivative may contain 1.5 to 3.3 parts by weight in 100 parts by weight of the adhesive. If the hydrazine derivative is less than 1.5 parts by weight, the above effect is insignificant, and if it exceeds 3.3 parts by weight, the flat adhesive layer 20 Difficulty forming may occur, and flexibility may be affected.

In addition, the flat adhesive layer 20 may further include a vinyl acetate-based copolymer.

The vinyl acetate-based copolymer may be adapted to form a layer by adjusting the viscosity of the flat adhesive layer 20.

These vinyl acetate-based copolymers preferably have a linear structure, and the vinyl acetate-based copolymer having a linear structure is in vinyl acetate as a monomer, vinyl versatate, isobutyl acrylate. (iso-butyl acrylate), n-Butyl acrylate, Ethyl acrylate, 2-Ethylhexyl acrylate, Lauryl acrylate, Ethylene It may be a vinyl acetate-based copolymer synthesized to have a linear polymerization structure by polymerizing a comonomer such as (Ethylene).

Further, the glass transition temperature (Tg) of the vinyl acetate-based copolymer having a linear structure is preferably -5 to 10°C.

At this time, if the glass transition temperature (Tg) is less than -5°C, the viscosity may increase too much, causing problems with hardening and physical properties of the flat adhesive layer 20, and if it exceeds 10°C, difficulties in forming the layer may occur. have.

Further, the vinyl acetate-based copolymer having a linear structure is preferably 7 to 11 parts by weight based on 100 parts by weight of the pressure-sensitive adhesive.

At this time, if the vinyl acetate-based copolymer is less than 7 parts by weight, the viscosity control function is insignificant, and if it exceeds 12 parts by weight, the viscosity may increase too much.

The composition of the flat adhesive layer 20 may have a weight average molecular weight of 700,000 to 1,200,000 g/mol.

At this time, if the weight average molecular weight is less than 700,000, the adhesive retention power is low, so that it may be separated from the base film 10, and if it exceeds 1,200,000, it may not be suitable for adhesion as the desired flat adhesive layer 20.

At this time, the thickness of the flat adhesive layer 20 is preferably formed in a range of 10 to 40 μm. If the thickness is less than 10 μm, the adhesive strength decreases and adhesion is not easy, and if it exceeds 40 μm, the double-sided adhesive film (1) May be too thick.

The embossed pattern adhesive layer 30 is a layer formed to have an embossed pattern on the other surface of the base film 10, and the release film 40 may be attached to the other surface.

Accordingly, when the release film 40 is removed, it may be attached to the adherend, which may exhibit an air-free function.

The embossed pattern adhesive layer 30 may be made of a pressure-sensitive adhesive through the above process, and the pressure-sensitive adhesive may include one of a silicone-based resin, a polyurethane-based resin, an acrylic resin, an olefin-based ethylene-vinyl acetate-based resin, and an epoxy-based resin. , But is not limited thereto.

In addition, the embossed pattern adhesive layer 30 may further include an adhesion promoter, which is one or more of maleic anhydride polymerized polypropylene and silane-based resin.

The adhesion promoter may include 8 to 15 parts by weight in 100 parts by weight of the adhesive. If the adhesion promoter is less than 8 parts by weight, the effect of improving the adhesion of the embossed pattern adhesive layer 30 is insignificant, and if it exceeds 15 parts by weight, the adhesion promoter This is because it may deteriorate or precipitate and appear as foreign matter.

That is, an adhesion promoter is further included in the embossed pattern adhesive layer 30 having an adhesive function, so that the adhesion of the embossed pattern adhesive layer 30 may be improved, and thus adhesion to the base film 10 and the printing paper The adhesion can be improved.

In addition, the embossed pattern adhesive layer 30 may further include gypsum, potassium sulfate, and disodium succinate.

By including gypsum, potassium sulfate and disodium succinate in the embossed pattern adhesive layer 30, shrinkage and expansion of the embossed pattern adhesive layer 30 is reduced to prevent shape deformation, improve shape stability, and shorten curing time. I can make it. In addition, adhesion to the base film 10 and adhesion to the adherend may be improved.

These gypsum, potassium sulfate and disodium succinate may be further included in the emboss pattern adhesive layer 30 in 100 parts by weight of the adhesive, 10 to 20 parts by weight, 40 to 60 parts by weight, and 30 to 38 parts by weight.

At this time, if the gypsum is less than 10 parts by weight, shrinkage may occur and shape stability may be deteriorated, and if it exceeds 20 parts by weight, swelling occurs and shape stability decreases, and precipitation may appear as a foreign material.

In addition, if potassium sulfate is less than 40 parts by weight, the effect of shortening the curing time is insignificant and swelling may occur, resulting in lower shape stability. If it exceeds 60 parts by weight, it may affect the flexibility, and shrinkage may result in lower shape stability. have.

In addition, when the amount of disodium succinate is less than 30 parts by weight, the effect of improving adhesion is insignificant, and when it exceeds 38 parts by weight, the air-free function may be deteriorated by affecting the flexibility.

In this way, since gypsum, potassium sulfate and disodium succinate interact with each other to exhibit the above effects, they may be mixed in parts by weight as described above to exhibit an optimum effect.

In addition, the embossed pattern adhesive layer 30 may further include alginic acid, hyaluronic acid, and chitin.

Here, alginic acid can improve the adhesion to the adherend of the embossed pattern adhesive layer 30 including carboxyl groups and play a role of preventing residues, and hyaluronic acid has a role of preventing residues by improving adhesion to the adherend including carboxyl groups. And improves flexibility, and chitin can improve the shape stability of the embossed pattern adhesive layer 30.

That is, the embossed pattern adhesive layer 30 further includes alginic acid, hyaluronic acid, and chitin, and the adhesion of the embossed pattern adhesive layer 30 to the adherend is improved to prevent the occurrence of residues, and flexibility and shape stability It is improved so that it is preferable to form an embossed pattern, and the air-free function can be better displayed.

At this time, by using a mixture of alginic acid, hyaluronic acid, and chitin, the above effect can be exhibited more effectively than when using one.

In addition, alginic acid, hyaluronic acid, and chitin may be further included in an amount of 10 to 15 parts by weight, 10 to 15 parts by weight, and 3 to 8 parts by weight in 100 parts by weight of the adhesive.

When the amount of alginic acid and hyaluronic acid is less than 10 parts by weight, the adhesiveness improvement and the effect of preventing residues may decrease, and when it exceeds 15 parts by weight, the physical properties of the embossed pattern adhesive layer 30 may be deteriorated.

In addition, if the amount of chitin is less than 3 parts by weight, the effect of improving shape stability is insignificant, and if it exceeds 8 parts by weight, the flexibility is too low, which may affect the air-free function.

In addition, the embossed pattern adhesive layer 30 may further include phenoxyethyl acrylate and phenyl maleimide.

At this time, phenoxyethyl acrylate and phenyl maleimide may be included in 3 to 7 parts by weight and 5 to 10 parts by weight in 100 parts by weight of the adhesive.

In the case of the embossed-pattern adhesive layer 30, elasticity control is important because the contraction stress must be uniformly generated on both sides, and when the contraction stress is not uniformly generated, problems such as low durability, phase difference, birefringence, and light leakage may occur. I can.

Accordingly, it is desirable to design to have a high refractive index, elastic modulus, and glass transition temperature in order to prevent the above problem.

Accordingly, phenoxyethyl acrylate and phenyl maleimide are further included, and phenoxyethyl acrylate is a high refractive material, and the refractive index of the embossed pattern adhesive layer 30 can be adjusted. In addition, since phenyl maleimide has high glass transition ionicity and high elasticity, the elasticity of the embossed pattern adhesive layer 30 can be controlled.

At this time, when the amount of phenoxyethyl acrylate is less than 3 parts by weight, the refractive index does not sufficiently increase, so that birefringence and light leakage may occur, and when it exceeds 7 parts by weight, the refractive index is sufficiently increased and thus inefficiency may occur.

In addition, when the amount of phenyl maleimide is less than 5 parts by weight, the elasticity is not sufficiently increased, so durability decreases, and when it exceeds 10 parts by weight, the elasticity is excessively increased, so that the embossing pattern of the embossed pattern adhesive layer 30 is smoothly formed. There may be a problem of not doing it.

In addition, the embossed pattern adhesive layer 30 may further include a hydrazine derivative and a vinyl acetate-based copolymer in the same manner as the flat adhesive layer 20. Since it includes the same as the flat adhesive layer 20, a detailed description will be omitted.

The embossed pattern adhesive layer 30 made as described above may be formed in a thickness of 15 to 50 μm through a gravure coating method.

At this time, when the embossed pattern adhesive layer 30 is less than 15 μm, the air-free function of removing air bubbles is inhibited, and when the thickness is 50 μm or more, there may be a problem that it is not easy to form the embossed pattern of the embossed pattern adhesive layer 30.

More specifically, the coating method of the embossed pattern adhesive layer 30 is a gravure coating method, as shown in FIG. 2, in which a pressure-sensitive adhesive (R, composition constituting the embossed-pattern adhesive layer), which is an adhesive polymer resin in the gravure Sara, is an intaglio pattern. When the roll 100 is filled and the base film 10 passes between the pattern roll 100 and the rubber roll 200, it is transferred to the base film 10 to form a three-dimensional shape in an embossed shape to form an embossed pattern.

Here, the pattern of the intaglio-shaped pattern roll 100 is not limited and may be formed in various shapes to variously form the emboss pattern of the emboss pattern adhesive layer 30.

In addition, a knife (N) is provided in the pattern roll 100 so that the adhesive (R) can be uniformly filled in the intaglio pattern roll 100 so that the formed emboss pattern can be uniformly formed as a whole.

Conventionally, by forming an embossed pattern on the base film 10, the type of the base film 10 was limited, or the adhesion of the base film 10 and the adhesive layer 30 to the base was lowered, requiring an additional process. By forming the layer 30, the type of the base film 10 is not limited and an additional process may not be required.

The release film 40 is attached to one surface of the flat adhesive layer 20 and the other surface of the embossed pattern adhesive layer 30 so that the adhesive strength of the flat adhesive layer 20 or the embossed pattern adhesive layer 30 from the outside is not reduced or damaged. Can protect.

This release film 40 may be made of one or more of epoxy-based, epoxy-melamine-based, aminoalkyd-based, acrylic-based, melamine-based, silicone-based, fluorine-based, cellulose-based, water-repellent resin-based, polyolefin-based, and paraffin-based, and from 1 μm to It is preferred to have a thickness of 2 mm.

At this time, if the thickness of the release film 40 is too thin or too thick outside the above range, it may be difficult to handle.

As described above, the double-sided adhesive film having the embossed pattern adhesive layer according to the embodiment of the present invention forms an embossed pattern on the adhesive layer attached to the adhesive, thereby exhibiting an air-free function when attaching the film to the adhesive. I can.

Accordingly, when the film is attached, air is easily discharged according to the emboss pattern of the embossed pattern adhesive layer, so that the air bubble layer does not locally remain between the film and the adherend, thereby increasing adhesion and improving ease of construction.

In addition, when the film is removed from the adherend later, the residue can be removed cleanly without remaining.

Hereinafter, the present invention will be described in more detail by examples.

However, the following examples are only illustrative of the present invention, and the contents of the present invention are not limited by the following examples.

[ Example ]

[Example 1]

A double-sided adhesive film was prepared by forming a flat adhesive layer on one side of the base film, and forming an emboss pattern adhesive layer having an emboss pattern with a silicone adhesive on the other side to a thickness of 25 μm.

At this time, the adhesive layer was formed by transferring the adhesive filled in the intaglio-type pattern roll while passing between the intaglio-type pattern roll and the rubber roll on the base film and forming a three-dimensional shape in a relief.

[Example 2]

In 100 parts by weight of the pressure-sensitive adhesive, it was prepared in the same manner as in Example 1, except that 8 parts by weight of an adhesion promoter which is maleic anhydride polymerized polypropylene was further included to form an embossed-pattern adhesion layer.

[Example 3]

In 100 parts by weight of the adhesive, it was prepared in the same manner as in Example 1, except that the embossed pattern adhesive layer was formed by further including 15 parts by weight of gypsum, 50 parts by weight of potassium sulfate, and 35 parts by weight of disodium succinate.

[Example 4]

In 100 parts by weight of the pressure-sensitive adhesive, it was prepared in the same manner as in Example 1, except that an embossed-pattern adhesive layer was formed further including 15 parts by weight of alginic acid, 15 parts by weight of hyaluronic acid, and 5 parts by weight of chitin.

[Example 5]

In 100 parts by weight of the pressure-sensitive adhesive, prepared in the same manner as in Example 1, except that 5 parts by weight of phenoxyethyl acrylate and 8 parts by weight of phenyl maleimide were further included to form an embossed-pattern adhesive layer. I did.

[Comparative Example]

A double-sided adhesive film was prepared by applying a silicone-based adhesive on both sides of the base film to form a flat adhesive layer to a thickness of 25 μm, respectively.

[ Experimental example ] Adhesion, Air-free function And Residue evaluation

The adhesive strength of Examples 1 to 5 and Comparative Examples, air-free function and residue upon adhesion were evaluated.

The double-sided adhesive films of Examples 1 to 5 and Comparative Examples were cut into 25mm * 120mm in the MD direction, and each of the specimens was attached to a polyimide film (Apical 25NPI), and then laminated with a weight of 4kgf/cm, and at 23°C and 50%RH. After leaving the sample in an atmosphere for 60 minutes, the adhesive strength was measured by measuring the stress on the sample at a peel angle of 180° and a peel rate of 300 mm/min.

The residue was adhered to the glass plate at 100° C. for 1 hour, and then it was measured whether the adhesive remained on the glass surface.

The results are shown in Table 1 below.

Here, the air-free function was evaluated as ◎: excellent, ○: excellent, △: normal, X: bad, and the residue was evaluated as ○: Yes, X: No.

Adhesion (g/25mm) Air-free function Residue Example 1 40 ◎ X Example 2 45 ◎ X Example 3 44 ◎ X Example 4 47 ◎ X Example 5 40 ◎ X Comparative example 50 X ○

As can be seen in Table 1, it was confirmed that Examples 1 to 5 exhibited excellent air-free function, but the comparative example did not exhibit the air-free function. In addition, Examples 1 to 5 had a slightly lower adhesive strength than Comparative Examples, but there was no significant difference, and it was confirmed that no residue was left.

However, it was confirmed that the residue remained in the comparative example.

That is, Examples 1 to 5 could be judged to be superior as double-sided adhesive films, exhibiting an air-free function without leaving a residue even though the adhesive strength was not significantly lower than the comparative example.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concept of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

1: double-sided adhesive film
10: base film
20: flat adhesive layer
30: embossed pattern adhesive layer
40: release film
100: pattern roll
200: rubber roll
R: adhesive
N: knife

Claims (8)

Base film;
A flat adhesive layer formed on one surface of the base film;
An embossed pattern adhesive layer formed to have an embossed pattern on the other side of the base film, and
Including a release film attached to one surface of the flat adhesive layer and the other surface of the embossed pattern adhesive layer, respectively,
At least one of the flat adhesive layer and the embossed pattern adhesive layer,
It includes one of a silicone resin, a polyurethane resin, an acrylic resin, an olefin-based ethylene-vinyl acetate-based resin, and an epoxy-based resin,
The embossed pattern adhesive layer,
Double-sided adhesive film having an embossed pattern adhesive layer further comprising gypsum, potassium sulfate and disodium succinate.
The method of claim 1,
The base film,
A double-sided adhesive film having an embossed pattern adhesive layer, characterized in that it is a film composed of one of polyolefin, polyvinyl chloride, polyethylene terephthalate (PET), polystyrene, polymethacrylate, and polycarbonate, or a composite film composed of two or more.
delete The method of claim 1,
At least one of the flat adhesive layer and the embossed pattern adhesive layer,
Maleic anhydride polymerized polypropylene and a double-sided adhesive film having an embossed pattern adhesive layer further comprising at least one of a silane-based resin adhesion promoter.
The method of claim 1,
The embossed pattern adhesive layer,
The double-sided adhesive film having an embossed pattern adhesive layer, characterized in that the pressure-sensitive adhesive is filled in an intaglio-type pattern roll and transferred to the base film when the base film passes between the pattern roll and the rubber roll, and is shaped in an embossed form to have an embossed pattern.
delete The method of claim 1,
The embossed pattern adhesive layer,
Double-sided adhesive film having an embossed pattern adhesive layer further comprising alginic acid, hyaluronic acid and chitin.
The method of claim 1,
The embossed pattern adhesive layer,
A double-sided adhesive film having an embossed pattern adhesive layer further comprising phenoxyethyl acrylate and phenyl maleimide.

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