KR20200015215A - Release film patterned and Tape comprising the same - Google Patents

Abstract

The present invention relates to a patterned release film and a tape including the same, and specifically, to solve the problem that the laminated tapes stick to each other even without adopting the kanji used to solve the conventional problem, and between the tapes. The present invention relates to a patterned release film and a tape including the same, which can solve the problem that the tape is not loaded one by one due to vacuum or static electricity.

Description

Release film patterned and Tape comprising the same

The present invention relates to a patterned release film and a tape comprising the same.

Generally, a release film is used for a double-sided adhesive tape, a single-sided adhesive tape with a release film, a protective film of a product, etc. As such a release film, the method of apply | coating a mold release agent, such as a silicone type compound, a long chain alkyl type compound, and polyvinyl alcohol carbamate, on the surface of base materials, such as a resin film and paper, has conventionally been employ | adopted. However, since the release film of the type which apply | coats such a mold release agent to a base material is difficult to uniformly apply, it is difficult to control a release force, and when it is a process of manufacturing a mold release film in roll shape, it is to the adhesion layer side of a release film facing. There arises a problem that the release agent is transferred and the re-adhesive property (the adhesive force of the pressure-sensitive adhesive layer after peeling off the release film) is lowered.

In order to solve the above problem, a release film using polyolefin resin crosslinked by polysiloxane (JP-A-10-44349), or a release film containing a fatty acid amide compound in polyethylene resin (JP-A-2006) A release film which mix | blended a mold release agent with resin, such as the release film (Japanese Unexamined-Japanese-Patent No. 2009-161482) and the release film which contains a fatty acid bisamide type compound in the propylene polymer. Moreover, the agricultural film which consists of a resin composition obtained by adding a fatty acid bisamide compound to an ethylene-alpha-olefin copolymer is disclosed (Japanese Patent Laid-Open No. 2002-128965).

In addition, the adhesive tape including the release film is used by laminating, and at this time, the adhesive is transferred to the base film so that the laminated tapes adhere to each other, thereby causing a defect, and a vacuum or static electricity is applied between the tape and another adjacent tape. This causes a problem that the tapes are not loaded one by one.

In order to solve this problem can be inserted between the tape between the tape, in this case there is a problem that the cost increases due to the additional process for inserting the paper and the material cost of the paper.

According to one embodiment of the present invention, as a release film including a pattern layer, even if not using the paper used to solve the conventional problem solved the problem that the laminated tape is stuck and the defect occurs, vacuum between the tape The present invention provides a patterned release film and a tape including the same, which can solve the problem that the tape is not loaded one by one due to jamming or static electricity.

One preferred embodiment of the present invention for solving the above problems is a transparent base film; A release agent layer formed on one surface of the transparent base film; And it comprises a pattern layer formed on the other side of the transparent base film, the pattern step of the pattern layer is to provide a release film of 0.5 ~ 1000㎛.

The pattern structure of the pattern layer is characterized in that it comprises a pattern formed in a regular or irregular pattern of hemispherical, conical, tetrahedral or triangular pyramid or a prism-shaped triangular prism or semi-cylindrical column arranged in a predetermined direction.

The pattern layer is formed using a UV imprinting (imprinting) method, or characterized in that formed in the pattern layer including any one or more selected from particles of the bead and the amorphous.

When the pattern layer is formed by including any one or more selected from beads and amorphous particles, the pattern is formed by adding particles to a thermosetting resin composition or an ultraviolet curable resin composition and curing the particles.

It characterized in that it comprises an antistatic coating layer between the release agent layer and the transparent base film and / or on the other side of the pattern layer, respectively.

According to another preferred embodiment of the present invention, it is to provide a tape comprising the above-described release film.

The patterned release film and the tape including the same according to an embodiment of the present invention eliminate the problem that the laminated tapes stick to each other even without adopting a paper used to solve the conventional problem, and vacuum between the tapes. This eliminates the problem that the tape is not loaded one by one due to jamming or static electricity.

1 is a view schematically showing the structure of a release film according to an embodiment of the present invention.
2 is a view schematically showing the structure of a release film according to another embodiment of the present invention.
3 is a photograph taken from the front of the pattern layer of the release film according to Example 1 of the present invention.
4 is a view showing a pattern layer of a release film according to Example 4 of the present invention.
5 is a view showing a pattern layer of a release film according to Example 5 of the present invention.

One preferred embodiment of the present invention is a transparent base film; A release agent layer formed on one surface of the transparent base film; And it comprises a pattern layer formed on the other side of the transparent base film, the pattern step of the pattern layer is to provide a release film of 0.5 ~ 1000㎛.

1 is a view schematically showing the structure of a patterned release film according to an embodiment of the present invention.

Referring to FIG. 1, a release agent layer is positioned on one surface of the transparent base film, and a pattern having various forms of block structures is formed on the pattern layer formed on the other side of the transparent base film.

As shown in FIG. 1, the pattern step of the pattern layer means a distance between the highest point and the lowest point of the pattern structure.

When the pattern step is in the range of 0.5 to 1000 μm, preferably 0.5 to 50 μm, more preferably 5 to 30 μm, even if no interlayer paper is employed, the laminated tapes stick to each other to solve the problem of defects. It can solve the problem that the tapes are not loaded one by one due to the vacuum between the tapes or the static electricity.

The pattern structure of the pattern layer may include hemispherical, conical, tetrahedral or triangular pyramidal regular or irregularly formed patterns, or may include patterns formed by arranging prismatic triangular or semi-cylindrical columns in a predetermined direction. Is preferably a pattern structure in which hemispherical shapes are distributed irregularly.

The pattern layer may be formed using a UV imprinting method, or may be formed by including a bead in the pattern layer.

In the case of forming the pattern layer by using the UV imprinting method, after coating a composition including an acrylate-based resin for UV curing on one surface of the base film, applying pressure with a mold, curing by irradiating UV lamp and convex The pattern of the structure can be formed.

The mold may use a mold engraved with a pattern according to any purpose, and in another embodiment of the present invention includes a regular or irregularly formed pattern of a hemispherical shape, a cone shape, a tetrahedron shape, or a triangular shape shape or a prism shape as described above. The triangular prism or semi-circle of the can be used a mold engraved with a convex structure including a pattern formed by being arranged in a predetermined direction.

In addition, the pattern layer may be formed to include a pattern including any one or more selected from beads and amorphous particles, which is a conventional method in the field of the present invention. By dispersing and coating a coating liquid to form a pattern layer can be formed on the surface of the pattern layer, such as hemispherical embossing structure or irregular hemispherical structure.

When the pattern layer is formed by including any one or more selected from beads and amorphous particles, the pattern may be formed by adding particles to a thermosetting resin composition or an ultraviolet curable resin composition and curing the particles.

The base film is not particularly limited as long as it is transparent, and examples thereof include polyterephthalate (PET), polyimide (PI), PC, PVC, PP, PE, and the like.

In addition, the release film may include an antistatic coating layer between the release agent layer and the transparent base film and / or on the other surface of the pattern layer, respectively.

2 is a view schematically showing the structure of a release film according to another embodiment of the present invention.

Referring to FIG. 2, an antistatic coating layer may be included between a release agent layer (release agent coating layer) and a base film, and an antistatic coating layer may be included on a lower surface of the pattern layer.

According to another embodiment of the present invention, to provide a tape comprising the above-described release film.

The tape includes a variety of tapes that enter the interior of the electronic product.

The tape may be a single layer structure composed of a base material and a point adhesive, or may be a multilayer structure in which the single layer structure is laminated.

The tape including the release film is preferably a structure in which a base material, a dot / adhesive located on one surface of the base material, and another surface of the dot / adhesive and a release layer of the release film are grafted, but is not limited thereto.

Examples of the tape may include PET, PC, PI, copper foil, heat dissipation sheet, foam sheet, and the like, but are not limited thereto.

When the tape is laminated, including the release film having a pattern layer, the tape forms an air layer between the tape and the tape, and makes the sheet fed by the sheet automatic loading machine, so that the tape is not loaded one by one due to vacuum or static electricity. Can solve the problem. In addition, it is possible to prevent the defects while reducing the process and material costs due to adopting the interstitial sheets are not employed, so as to prevent the defects due to the adhesion problem between the tapes.

Example

Hereinafter, the present invention will be described in more detail with reference to Examples. These examples are only for illustrating the present invention more specifically, and the present invention is not limited thereto.

< Example  1>

A PET substrate having a thickness of 250 μm and a tape having an acryl adhesive (adhesive strength of 1,500 gf / inch) formed on a thickness of 30 μm were prepared.

Meanwhile, a release film layer having a thickness of 0.5 μm was formed on one surface of the transparent PET having a thickness of 50 μm, and a pattern layer of 30 μm (variable) was formed on the other surface of the transparent PET to prepare a release film.

Then, a tape including a patterned release film was prepared by laminating the pressure-sensitive adhesive side of the prepared tape and the release agent layer of the release film.

At this time, the pattern structure of the pattern layer is shown in FIG.

3 is a photograph taken from the front of the pattern layer of the release film according to the first embodiment. As shown in Figure 3, the pattern layer has an irregular hemispherical shape, the step was satisfied the range of 5 ~ 30㎛.

< Example  2>

It carried out by the method similar to Example 1 except forming so that the level | step difference of a pattern layer may be satisfied in the range of 0.5-2 micrometers.

< Example  3>

The same procedure as in Example 1 was carried out except that the step of the pattern layer was formed to satisfy the range of 2 to 5 μm.

< Example  4>

It carried out by the same method as Example 1 except the pattern structure of the pattern layer was formed like FIG.

4 is a view showing a pattern layer of a release film according to Example 4 of the present invention, having a step E having a width of 6.7 μm, a cross section having a width of 125 μm, and a block having a rectangular shape and a width of 30 μm. The cubic structure, in which the block structure having a rectangular cross section was formed in a diagonal line in a square of width (A) 600 µm x length (B) 600 µm, had a regularly arranged pattern.

< Example  5>

It carried out by the same method as Example 1 except the pattern structure of the pattern layer was formed like FIG.

FIG. 5 is a view showing a pattern layer of a release film according to Example 5 of the present invention, in which a block E having a step E having a width of 4.2 μm and a cross section having a width of 30 μm is regularly arranged at regular intervals. Had structure.

< Comparative example  1>

It carried out by the method similar to Example 1 except forming the level | step difference of a pattern layer below 0.5 micrometer.

< Measurement example >

The physical properties of the tapes prepared from the above Examples and Comparative Examples were evaluated according to the following methods, and the results are shown in Table 1 below.

 (1) Measurement of the number of transfer failures: 100 finished tapes of the finished tape in rectangular form were stacked by using a punching machine (8cm × 16cm), and then a bundle of 100 stacked tapes was put between the glass plates and 70 gf Leave for 5 hours under a / cm2 load. Then, the glass plate is removed and conveyed one by one using a suction feeder. At this time, record the number of times failed to transfer one by one.

division Pattern step Number of transfer failures Example 1 5 ~ 30㎛ 0 Example 2 0.5 ~ 2㎛ 9 Example 3 2 ~ 5㎛ 3 Example 4 6.7 ㎛ 16 Example 5 4.2 μm 14 Comparative Example 1 <0.5 μm 43

As shown in Table 1, Examples 1 to 5 recorded a numerical value that is significantly lower than that of Comparative Example 1 because the step difference in the pattern layer of the release film satisfies the range of 0.5 to 30 μm. In particular, when the pattern layer had irregular hemispherical shape but the step was satisfied with the range of 5 ~ 20㎛, it was found that the number of transfer failures was 0, which is the best effect.

Claims (6)

Transparent base film;
A release agent layer formed on one surface of the transparent base film; And
It includes a pattern layer formed on the other side of the transparent base film,
The pattern step of the pattern layer is a release film of 0.5 ~ 1000㎛. The pattern structure of claim 1, wherein the pattern structure of the pattern layer includes a regular or irregular pattern of hemispherical, conical, tetrahedral, or triangular pyramid, or includes a pattern formed by arranging prismatic triangular or semi-cylindrical columns in a predetermined direction. Release film, characterized in that. The release film of claim 1, wherein the pattern layer is formed using a UV imprinting method, or the pattern layer is formed by including at least one selected from beads and irregular particles.
The method of claim 1, wherein when the pattern layer is formed including any one or more selected from beads and amorphous particles, the pattern is formed by adding particles to a thermosetting resin composition or an ultraviolet curable resin composition to form a pattern. Release film to say.
The release film of claim 1, further comprising an antistatic coating layer between the release agent layer and the transparent base film and / or on the other side of the pattern layer, respectively.
Tape comprising a release film according to any one of claims 1 to 5.

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