KR102186008B1 - One side type adhesive tape for sealing water tank, preparing method of the same and water tank module using the same - Google Patents

Abstract

The present invention relates to a one-sided bonding type adhesive tape having improved workability and easy storability, to a production method thereof, and to a water tank module using the same. The one-sided bonding type adhesive tape comprises: a base film; a first bonding layer disposed on the base film; a release film disposed on the first bonding layer; and a second bonding layer disposed on the release film.

Description

One-sided bonding tape for water tank sealing, manufacturing method thereof, and water tank module using the same {ONE SIDE TYPE ADHESIVE TAPE FOR SEALING WATER TANK, PREPARING METHOD OF THE SAME AND WATER TANK MODULE USING THE SAME}

The present invention relates to a bonding tape for sealing a water tank, a manufacturing method thereof, and a water tank module using the same, and more particularly, to a bonding tape including a release film, a manufacturing method thereof, and a water tank module. More specifically, the present invention relates to a one-sided bonding type bonding tape including a release film, a method of manufacturing the same, and a water tank module.

Bonding articles, such as bonding tapes, have been used in various fields to join members. The bonding tape generally performs bonding with the skin adhesive using the adhesive force or adhesive force of the bonding layer including the bonding layer. In this case, in order to maintain the adhesion or adhesive activity of the bonding layer, a release film that is easily peeled may be attached to protect the bonding layer.

On the other hand, bonding tapes can be roughly divided into double-sided bonding tapes and one-sided bonding tapes. The double-sided bonding tape is configured such that, with the release film removed, bonding layers are disposed on both sides of the base film as the center to bond two opposing skin complexes. On the other hand, the one-sided bonding tape is configured such that the bonding layer is disposed only on one side of the base film in a state in which the release film is removed to bond two adjacent skin complexes.

Korean Patent Registration No. 10-1694182 (2017.01.03)

Patent Document 1 discloses a bonding tape having a microstructured surface. The bonding tape of Patent Document 1 contains a bonding member and a release liner. Patent Document 1 is characterized in that the surface of the bonding member is microstructured to improve the bonding strength between the skin complex and the bonding member. In addition, Patent Document 1 shows a state in which a bonding tape is rolled in the longitudinal direction and wound up.

However, when the bonding tape of Patent Document 1 is rolled and stored, there is a problem that the roll is easily released. That is, the bonding tape cannot be completely maintained in a wound state, which may cause inconvenient storage and operation. In addition, since the bonding tape maintains a taut shape while it is wound, damage may be caused to the bonding tape.

Meanwhile, bonding tape can be used to seal the water tank. Since the sealing tape for water tank sealing is continuously exposed to moisture in contact with water, it should not only have low moisture permeability, but also should have substantially no solubility in water. If the adhesive tape dissolves in water, harmful substances may be ingested by humans.

Accordingly, the problem to be solved by the present invention is to provide a one-sided bonding type bonding tape that improves workability, facilitates storage, and does not cause damage to the structure of the bonding tape. In addition, there is substantially no solubility in water, it is environmentally friendly, to provide a one-sided bonding adhesive tape for water tank sealing excellent in waterproof properties.

Another problem to be solved by the present invention is to provide a one-sided bonding type bonding tape in a rolled state that improves workability, facilitates storage, and does not cause damage to the structure of the bonding tape.

In addition, another problem to be solved by the present invention is to provide a method of manufacturing a one-sided bonding type bonding tape that improves workability, facilitates storage, and does not cause damage to the structure of the bonding tape.

Another problem to be solved by the present invention is to provide a water tank module using a sealing joint tape that does not show any harm to the human body.

The problems of the present invention are not limited to the technical problems mentioned above, and other technical problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

One-sided bonding type bonding tape according to an embodiment of the present invention for solving the above problems, the base film; A first bonding layer disposed on the base film; A release film disposed on the first bonding layer; And it characterized in that it comprises a second bonding layer disposed on the release film.

The base film may include a polyethylene foam film.

The release film may include a polyvinyl chloride film or a polyethylene terephthalate film.

In addition, the second bonding layer may include an acrylic copolymer, toluene, and ethyl acetate.

The second bonding layer may include 25% to 35% by weight of the acrylic copolymer.

The second bonding layer may contain 14% to 19% by weight of the toluene.

In addition, the second bonding layer may include 47% to 61% by weight of ethyl acetate.

The modulus of the first bonding layer may be greater than that of the second bonding layer.

In addition, the thickness of the first bonding layer may be greater than the thickness of the second bonding layer.

In addition, the release film has one side in contact with the second bonding layer and the other side in contact with the first bonding layer, and the release film is coated only on the other side, and is coated with silicone coating, polyethylene coating, or polyolefin. It can be a state.

The release film may have a plurality of through holes.

In addition, the second bonding layer may be at least partially inserted into the through hole, and the second bonding layer may contact the first bonding layer and the inner wall of the through hole.

One-sided bonding type bonding tape according to an embodiment of the present invention for solving the above other problems is rolled along the length direction.

Wherein the bonding tape, the base film; A first bonding layer disposed on the base film; A release film disposed on the first bonding layer; And a second bonding layer disposed on the release film, wherein the rolled bonding tape is rolled so that the second bonding layer faces outward and the base film faces inward, and the bonding tape is rolled In, it characterized in that the upper surface of the second bonding layer is attached in contact with the lower surface of the base film.

A method of manufacturing a one-sided bonding type bonding tape according to an embodiment of the present invention for solving the another problem is the step of applying a first bonding layer composition on one side of a base film and attaching the base film and the release film ; Applying a second bonding layer composition on the release film and winding the base film and the release film, wherein the second bonding layer composition is wound so as to contact the other surface of the base film to form a roll; And aging the wound roll at 35° C. to 50° C. for 48 hours or more.

Here, the composition of the first bonding layer composition and the composition of the second bonding layer composition may be different.

The second bonding layer composition is a step of mixing an acrylic copolymer, toluene and ethyl acetate, wherein the acrylic copolymer 25% to 35% by weight, the toluene 14% to 19% by weight, and the ethyl acetate 47% by weight Mixing% to 61% by weight; And aging the mixture at 40° C. to 50° C. for 48 hours or more.

A water tank module according to an embodiment of the present invention for solving the another problem, a plurality of water tank modules; And a bonding tape sealing between the plurality of water tank units.

Here, the bonding tape may be a bonding tape according to an embodiment of the present invention.

Details of other embodiments are included in the detailed description.

According to embodiments of the present invention, it is possible to provide a single-sided bonding tape for improved workability and easy storage, a single-sided bonding tape in a rolled state, a manufacturing method of the bonding tape, and a sealed water tank module. have.

In addition, it is possible to provide a one-sided splicing tape that does not damage the structure of the splicing tape and has excellent eco-friendly and waterproof properties, a single-sided splicing tape in a rolled state, a manufacturing method of splicing tape, and a sealed water tank module. have.

Effects according to the embodiments of the present invention are not limited by the contents illustrated above, and more various effects are included in the present specification.

1 is a cross-sectional view of a one-sided bonding type bonding tape according to an embodiment of the present invention.
2 is a cross-sectional view of a one-sided bonding type bonding tape according to another embodiment of the present invention.
3 is a cross-sectional view of a one-sided bonding type bonding tape according to another embodiment of the present invention.
4 is a cross-sectional view showing a state in which the bonding tape of FIG. 1 is rolled.
5 and 6 are cross-sectional views showing a bonding tape having a structure compared to the present invention.
7 and 8 are cross-sectional views showing a bonding tape having a structure compared to the present invention.
9 is a flow chart showing a method of manufacturing a one-sided bonding type bonding tape according to an embodiment of the present invention.
10 is a schematic diagram showing the manufacturing method of FIG. 9.
11 is a photograph of a bonding tape prepared according to Example 7.
12 is a photograph of configuring a water tank module using a bonding tape prepared according to Example 7.
13 is a photograph of a bonding tape prepared according to Comparative Example 18.
14 is a photograph of a bonding tape prepared according to Comparative Example 19.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms different from each other, and only the embodiments make the disclosure of the present invention complete, and those skilled in the art to which the present invention pertains. It is provided to fully inform the person of the scope of the invention, and the invention is only defined by the scope of the claims.

Spatially relative terms such as'above','upper','on','below','beneath', and'lower' are As shown, it may be used to easily describe the correlation between one device or components and other devices or components. Spatially relative terms should be understood as terms including different directions of the device when used in addition to the directions shown in the drawings. For example, when an element shown in the figure is turned over, an element described as'below or beneath' another element may be placed'above' another element. Therefore, the exemplary term'below' may include both the lower and upper directions.

The size, thickness, width, length, etc. of the components shown in the drawings may be exaggerated or reduced for convenience and clarity of description, so the present invention is not limited to the illustrated form.

The terms used in the present specification are for describing exemplary embodiments and are not intended to limit the present invention. In this specification,'and/or' includes each and every combination of one or more of the recited items. In addition, the singular form also includes the plural form unless otherwise stated in the text. As used in the specification,'comprises' and/or'comprising' does not exclude the presence or addition of one or more other elements other than the mentioned elements. Numerical ranges indicated using'to' represent numerical ranges including the values listed before and after them as lower and upper limits, respectively. "About" or "approximately" means a value or numerical range within 20% of the value or numerical range described thereafter.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used as meanings that can be commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, terms defined in a commonly used dictionary are not interpreted ideally or excessively unless explicitly defined specifically.

The term'bonding' as used herein is a concept including'adhesion' and'adhesion'.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view of a one-sided bonding type bonding tape 10 according to an embodiment of the present invention.

Referring to FIG. 1, a bonding tape 10 according to an embodiment of the present invention includes a base film 100, a first bonding layer 310 and a release film 200, and a second bonding layer 320 It may further include. When the release film 200 and the second bonding layer 320 are removed, only the base film 100 and the first bonding layer 310 may remain in the bonding tape 10. Accordingly, the bonding tape 10 may function like a one-sided bonding type bonding tape. Although only a part of the bonding tape 10 is shown in FIG. 1, they may be in the shape of a sheet extending in a plane or a strip shape extending in the length direction. In addition, although not illustrated in FIG. 1, the bonding tape 10 may be rolled and wound.

The base film 100 may maintain the shape of the entire bonding tape 10 and stably support an upper component such as the first bonding layer 310. The base film 100 may have higher strength and lower elasticity than the first bonding layer 310. In addition, the base film 100 may have flexibility.

In an exemplary embodiment, the base film 100 may include a polyethylene (PE) foam film, specifically a polyethylene foam foam film. Polyethylene foam film has the advantage of having high waterproofness, low moisture permeability and low moisture absorption compared to other films, such as urethane foam, acrylic foam, and polyvinyl chloride. Therefore, there is an effect that the bonding tape 10 according to the present embodiment can be used for sealing of a water tank. In addition, when the base film 100 includes polyvinyl chloride, etc., when used for sealing of a water tank, the chlorine component in the base film 100 is dissolved in water, which is not preferable for hygiene. On the other hand, in the present invention, since the base film 100 does not contain chlorine, there is an excellent hygiene and eco-friendly effect. In addition, the polyethylene foam film has an excellent effect in peeling from the second bonding layer 320 according to the present invention, which will be described later. This will be described in detail later.

The release film 200 may be disposed on the base film 100. The release film 200 is at least partially spaced apart from the base film 100, and a first bonding layer 310 may be interposed therebetween. That is, the base film 100 and the release film 200 may be combined by the first bonding layer 310. In some embodiments, the first bonding layer 310 may directly contact the base film 100 and the release film 200.

The release film 200 may be a member for protecting the surface of the first bonding layer 310. That is, when the first bonding layer 310 is a pressure-sensitive bonding layer, the first bonding layer 310 may maintain an appropriate adhesive strength or adhesive strength and persistence at room temperature. At this time, the bonding force of the first bonding layer 310 may be affected by the degree of contamination of the surface, the surface energy, the elasticity of the surface, and the moisture content of the surface. Accordingly, the first bonding layer 310 may be protected by disposing the release film 200 on the first bonding layer 310.

The release film 200 may include a base film such as paper or plastic. The release film 200 may have higher strength and lower elasticity than the first bonding layer 310. In addition, the release film 200 may have flexibility.

Examples of materials suitable for use in the release film 200 include polypropylene (PP), polybutene, polybutadiene, polymethylpentene, polyvinyl chloride, And polyethylene terephtalate, polyurethane, and the like. In some embodiments, a polyvinyl chloride or polyethylene terephthalate material may be preferable in terms of adhesion to the second bonding layer 320 to be described later.

In some embodiments, the release film 200 may be surface-treated or coated to facilitate peeling from the first bonding layer 310. For example, the release film 200 may be in a state in which the upper surface (based on FIG. 1) is not surface-treated or coated, and only the lower surface (based on FIG. 1) is surface-treated or coated. Through this, the peeling between the release film 200 and the first bonding layer 310 may be facilitated, while the separation between the release film 200 and the second bonding layer 320 may be made difficult. That is, the bonding force between the release film 200 and the first bonding layer 310 may be less than the bonding force between the release film 200 and the second bonding layer 320. The coating may include a silicone coating (or laminate), a polyethylene coating (or laminate), and/or a polyolefin coating (or laminate).

The thickness of the release film 200 may be greater than the thickness of the base film 100.

The first bonding layer 310 may be disposed between the base film 100 and the release film 200. The first bonding layer 310 may be bonded to the base film 100 and the release film 200. The first bonding layer 310 may be a layer that substantially performs a bonding function in the bonding tape 10 after the release film 200 and the second bonding layer 320 are removed. That is, when the bonding tape 10 is used, it may be a layer that performs final bonding with the skin adhesion. Therefore, the first bonding layer 310 may be preferably made of a material capable of exhibiting sufficient modulus and bonding strength. The bonding force between the first bonding layer 310 and the base film 100 may be greater than the bonding force between the first bonding layer 310 and the release film 200.

The first bonding layer 310 may be a pressure-sensitive adhesive layer or a pressure-sensitive adhesive layer, but the present invention is not limited thereto. The first bonding layer 310 may be made of a material that performs a known adhesion or adhesion function. For example, (meth) acrylate polymer, vinyl (vinyl) polymer, butyl (butyl) polymer, silicon (silicon) polymer, styrene (styrene) polymer, and/or combinations thereof. I can.

The second bonding layer 320 may be disposed on the release film 200. Specifically, it may be disposed on the upper surface of the release film 200 based on FIG. 1. The second bonding layer 320 may be directly disposed on the upper surface of the release film 200. The upper surface of the second bonding layer 320 of the bonding tape 10 may be kept exposed to the air. That is, a separate component may not be disposed on the second bonding layer 320. In some embodiments, while the bonding tape 10 is rolled and wound, the second bonding layer 320 may contact the base film 100 of the bonding tape 10 positioned outside the circumferential direction. However, even in this case, those skilled in the art can clearly understand that when the bonding tape 10 is unwound in order to use the bonding tape 10, the upper surface of the second bonding layer 320 is exposed. There will be.

The second bonding layer 320 may be a temporary bonding layer or a temporary bonding layer for maintaining the bonding tape 10 in a rolled state. Therefore, it is preferable that the second bonding layer 320 has a relatively small modulus and bonding strength, and the first bonding layer 310 and the second bonding layer 320 may have different compositions. For example, the modulus of the second bonding layer 320 may be smaller than that of the first bonding layer 310. The bonding force between the second bonding layer 320 and the release film 200 may be greater than the bonding force between the second bonding layer 320 and the base film 100. In addition, the thickness of the second bonding layer 320 may be smaller than the thickness of the first bonding layer 310. The thickness of the second bonding layer 320 is relatively small to facilitate peeling between the second bonding layer 320 and the base film 100, and the thickness of the first bonding layer 310 is relatively large, It can impart excellent bonding properties with.

In an exemplary embodiment, the second bonding layer 320 may include an acrylic copolymer, toluene, and ethyl acetate. The inventor of the present invention invented a novel bonding layer, that is, the second bonding layer 320, which did not exist in the conventional bonding tape. In addition, unlike the conventional bonding tape, the second bonding layer 320 maintains a solid bond with the release film 200 while the bonding tape 10 is rolled, whereas the second bonding layer 320 is the base film 100 ) And the result of researching and developing the composition of the second bonding layer 320 and the material of the base film 100 so that it can be easily peeled off, the present invention has been completed.

In some embodiments, the second bonding layer 320 includes acrylic copolymer, toluene, and ethyl acetate, but the weight ratio therebetween may have a specific relationship. For example, the second bonding layer 320 may include 25 wt% to 35 wt% of the acrylic copolymer, 14 wt% to 19 wt% of the toluene, and 47 wt% to 61 wt% of the ethyl acetate. .

If the weight of ethyl acetate exceeds 61% by weight, the second bonding layer 320 and the base film 100 according to the present embodiment, in particular, when the base film 100 is a polyethylene foam film, the second bonding layer 320 It is not easy to peel off the rear surface of the polyethylene foam film, and the second bonding layer 320 may partially remain on the rear surface of the polyethylene foam film.

On the other hand, when the weight of ethyl acetate is less than 47% by weight, the second bonding layer 320 and the base film 100 according to the present embodiment, especially when the base film 100 is a polyethylene foam film, the second bonding layer 320 The bonding force between the and the back of the polyethylene foam film may be too weak to be sufficient to achieve the effect according to the present invention.

If the weight of toluene is less than 14% by weight, the miscibility with ethyl acetate may be deteriorated, and complete bonding strength may not be exhibited. On the other hand, when the weight of toluene exceeds 19% by weight, the second bonding layer 320 may not exhibit stable bonding strength. For example, a difference may occur in bonding strength of the second bonding layer 320 depending on temperature, and reliability may not be guaranteed.

Meanwhile, the weight ratio between the acrylic copolymer and toluene may be about 8:12 to 9:12, or about 8:11 to 9:11.

Meanwhile, the thickness of the second bonding layer 320 may be about 5 μm to 15 μm, or about 8 μm to 12 μm, or about 10 μm. When the thickness of the second bonding layer 320 is 15 μm or more, peeling of the second bonding layer 320 and the base film 100 may not be easy.

In some embodiments, the thickness of the entire bonding tape 10 may be about 2 mm to 5 mm, or about 3 mm to 4 mm.

Hereinafter, other embodiments of the present invention will be described. However, a description of the same configuration as the above-described bonding tape 10 will be omitted, which will be clearly understood by those skilled in the art from the accompanying drawings.

2 is a cross-sectional view of a one-sided bonding type bonding tape 12 according to another embodiment of the present invention.

Referring to FIG. 2, the upper surface of the release film 200 of the bonding tape 12 according to the present embodiment is different from the bonding tape 10 according to FIG. 1 in that it has a groove or a groove.

The upper surface of the release film 200 facing the second bonding layer 322 may have a groove. In this case, the maximum thickness of the release film 200 may be greater than the thickness of the base film 100. In some embodiments, the minimum thickness of the release film 200 may be smaller than the thickness of the base film 100. A plurality of grooves may be provided along the length direction of the bonding tape 12. In addition, the grooves may extend along the width direction of the bonding tape 12 or may be arranged in plurality.

The second bonding layer 322 is disposed on the release film 200 and may at least partially fill the groove of the release film 200. Accordingly, the second bonding layer 322 may contact the inner wall of the groove. In addition, the minimum thickness of the second bonding layer 322 may be smaller than the thickness of the first bonding layer 310.

The bonding tape 12 according to the present embodiment may further improve bonding strength between the release film 200 and the second bonding layer 322. When the rolled bonding tape 12 is unwound through this, the second bonding layer 322 is easily peeled off from the base film 100, and the second bonding layer 322 completely remains on the release film 200. It can be easy to do.

3 is a cross-sectional view of a one-sided bonding type bonding tape 14 according to another embodiment of the present invention.

Referring to FIG. 3, the release film 200 of the bonding tape 14 according to the present embodiment differs from the bonding tape 10 according to FIG. 1 in that it has a through hole.

The release film 200 may have a through hole penetrating in the thickness direction. A plurality of through holes may be provided along the length direction of the bonding tape 14. In addition, a plurality of through holes may be formed along the width direction of the bonding tape 14.

The second bonding layer 324 is disposed on the release film 200, and may at least partially fill the through hole of the release film 200. Accordingly, the second bonding layer 324 may contact the inner wall of the through hole. In some embodiments, the second bonding layer 324 may be inserted into the through hole to contact the first bonding layer 310. Through this, the bonding state between the first bonding layer 310 and the release film 200 in the initial state may be strengthened. Further, the minimum thickness of the second bonding layer 324 may be smaller than the thickness of the first bonding layer 310.

The bonding tape 14 according to the present embodiment may further improve bonding strength between the release film 200 and the second bonding layer 324. When the rolled bonding tape 14 is unwound through this, the second bonding layer 324 is easily peeled off from the base film 100 and the second bonding layer 324 completely remains on the release film 200 It can be easy to do.

Hereinafter, with reference to FIGS. 4 to 8 further, the effect of the present invention will be described using the bonding tape 10 according to the embodiment of FIG. 1 as an example. However, it will be clearly understood by those of ordinary skill in the art that the effect of the bonding tape 10 according to the present embodiment can be equally applied to the effect of the bonding tape according to FIGS. 2 and 3.

4 is a cross-sectional view showing a state in which the bonding tape 10 of FIG. 1 is rolled. In addition, FIGS. 5 and 6 are cross-sectional views showing a bonding tape having a structure compared to the present invention, specifically FIG. 5 is a cross-sectional view of a bonding tape having a structure compared to the present invention, and FIG. 6 is a rolling bonding tape of FIG. It is a cross-sectional view showing the state. In addition, FIGS. 7 and 8 are cross-sectional views showing a bonding tape having a structure compared to the present invention, specifically FIG. 7 is a cross-sectional view of a bonding tape having another structure compared to the present invention, and FIG. 8 is a rolled bonding tape of FIG. It is a cross-sectional view showing the state.

The structure of the bonding tape shown in FIGS. 5 to 8 does not imply a conventional technique or a background technique, and the inventors of the present invention conceived as an alternative structure in the process of completing the present invention to highlight the effects of the present invention. It should be noted that this is indicated for harm. That is, it should be understood that the structures of FIGS. 5 to 8 are also included in the technical idea of the present invention.

First, referring to FIG. 4 further, the bonding tape 10 according to the present embodiment may be rolled and wound. Figure 4 shows two layers of rolled up rolls. That is, the bonding tape 10 shown in FIG. 1 may be stacked in a circumferential outward direction (upper side based on FIG. 4 ). In other words, the second bonding layer 320 may be rolled to face the outer circumferential direction (upper side based on FIG. 4) and the base film 100 toward the inner side (lower side based on FIG. 4 ).

The upper surface of the second bonding layer 320 of the bonding tape 10 located at the lower side may contact the lower surface of the base film 100 of the bonding tape 10 located at the upper side. Further, the upper surface of the second bonding layer 320 on the lower side may be rolled while maintaining a bonded state with the lower surface of the base film 100 on the upper side. Accordingly, the bonding tape 10 can stably maintain the rolled state. Since the bonding tape 10 can maintain the winding shape even in a state in which a relatively small tension is applied, a physical force applied to the bonding tape 10 can be reduced, thereby minimizing structural deformation. In addition, there is also an effect that can provide work convenience to the operator who performs the work with the rolled bonding tape 10 wound.

Next, referring further to FIGS. 5 and 6, the film having the present comparative structure is different from the bonding tape 10 according to the present embodiment in that it does not include the second bonding layer positioned on the uppermost side. Figure 6 shows two layers of a wound roll. That is, the film shown in FIG. 5 may be stacked in a circumferential outward direction (upper side based on FIG. 6 ).

The upper surface of the release film 201 of the film located at the lower side may contact the lower surface of the base film 101 of the film located at the upper side. In this case, in order to maintain the rolled shape of the film, the film must be pulled tightly and tension must be applied. Therefore, there is a problem in that the structure may be deformed due to excessive physical force being applied to the film.

In addition, when the tension disappears, as shown in FIG. 6, the release film 201 of the lower film and the lower surface of the base film 101 of the upper film may be spaced apart. Accordingly, it may cause inconvenience to a worker who performs work with the rolled film.

Next, referring to FIGS. 7 and 8 further, the film having the present comparative structure does not include the second bonding layer located at the top, but the second bonding layer 351 disposed under the base film 101. It is different from the bonding tape 10 according to the present embodiment in that it further includes. Figure 8 shows two layers of a wound roll. That is, the film shown in FIG. 7 may be stacked in a circumferential outward direction (upper side based on FIG. 8 ).

The upper surface of the release film 201 of the film located at the lower side may contact the lower surface of the second bonding layer 351 of the film located at the upper side. In addition, the upper surface of the lower release film 201 may be rolled while maintaining a bonded state with the lower surface of the second bonding layer 351 on the upper side. Accordingly, the tape film can stably maintain the rolled state.

However, when the release film 201 is removed in order to use the film having the comparative structure according to FIGS. 7 and 8, the first bonding layer 311 and the second bonding layer ( There is a problem that all 351) remain. When the first bonding layer 311 is used as a layer for bonding with the skin complex, the second bonding layer 351 faces the opposite direction of the skin complex, that is, toward the operator. Therefore, there is a problem that the second bonding layer 351 is attached to the operator's hand or work tool, and it is difficult to remove the tape film.

The bonding tape 10 according to the present embodiment has a second bonding layer 320 on the release film 200, unlike the film structure shown in FIGS. 5 to 8, and is released when the bonding tape 10 is used. By removing all of the second bonding layer 320 together with the film 200, there is an improved effect compared to the film having the comparative structure described above.

Hereinafter, a method of manufacturing a bonding tape according to the present invention will be described.

9 is a flow chart showing a method of manufacturing a one-sided bonding type bonding tape according to an embodiment of the present invention. 10 is a schematic diagram showing the manufacturing method of FIG. 9.

9 and 10, the method of manufacturing a bonding tape according to the present embodiment includes preparing a second bonding layer composition (S100), preparing a base film (S200), and forming a first bonding layer. Step (S300), disposing a release film (S400), forming a second bonding layer using a second bonding layer composition (S500), winding a bonding tape film (S600), and a bonding tape film It may include an aging step (S700).

First, a second bonding layer composition is prepared (S100). As described above, the second bonding layer according to the present invention was completed by the inventor of the present invention. Preparing the second bonding layer composition (S100) may include preparing a mixture by mixing an acrylic copolymer, toluene, and ethyl acetate (S110), and aging the mixture (S120).

Since the composition and mixing ratio of the acrylic copolymer, toluene, and ethyl acetate have been previously described, overlapping descriptions will be omitted. The step of aging the mixture (S120) may be performed at 40°C to 50°C for 48 hours or more. If the mixture is not aged for a sufficient time, the peeling force between the second bonding layer and the base film (especially when the base film is made of polyethylene film) decreases, and the second bonding to the lower surface of the base film in the process of unwinding the roll. A problem with the remaining layers can arise. In addition, when the aging temperature is less than 40°C, a problem of lowering the peeling force between the second bonding layer and the base film may occur. On the other hand, when the aging temperature exceeds 50°C, a decrease in bonding strength of the second bonding layer may be caused.

Next, the base film 100 is prepared (S200), and the first bonding layer composition 310a is applied on one surface of the base film 100 to form the first bonding layer 310 (S300) and the base The release film 200 is disposed on the base film 100 by attaching the film 100 and the release film 200 (S400).

In an exemplary embodiment, the base film 100 and the release film 200 may be wound around the first unwinding roll 910 and the second unwinding roll 930, respectively. The base film 100 and the release film 200 may be unwound from the first unwinding roll 910 and the second unwinding roll 930 and pass between the pair of transfer rolls 950. In addition, the first bonding layer composition 310a is applied between the base film 100 and the release film 200 to form the first bonding layer 310 interposed between the base film 100 and the release film 200 can do.

Next, the prepared second bonding layer composition 320a is applied on the release film 200 (S500). In an exemplary embodiment, the second bonding layer composition 320a is applied to the coating roll 970, and the second bonding layer 320 may be formed on the release film 200 using the coating roll 970. have. 10 illustrates a case in which the second bonding layer composition 320a is roll coated, but the present invention is not limited thereto.

Next, the bonding tape on which the second bonding layer 320 is formed is wound up using a winding roll 990 (S600). In this case, the winding roll 990 may be configured such that the second bonding layer 320 faces the outer circumferential direction and the base film 100 faces the inner circumferential direction. In this step, at least a portion of the second bonding layer 320 may be bonded to the lower surface of the base film 100, and at least a portion (outermost) of the second bonding layer 320 may be exposed to the air.

If the second bonding layer 320 faces in the circumferential inner direction and the base film 100 is wound toward the outer circumferential direction, the second bonding layer 320 that is located in the relatively inner side is located relatively outside A greater bending tensile force may be applied compared to the base film 100. Accordingly, damage to the second bonding layer 320 may be caused. On the other hand, when the base film 100 is directed inward as in the present embodiment, a relatively large bending tensile force may be applied to the base film 100. Since the base film 100 has a larger thickness than the second bonding layer 320, it is easy to distribute the bending tensile force in the circumferential direction, and there is an advantage of minimizing damage to the film.

Next, the bonding tape film wound on the winding roll 990 is aged (S700). The step of aging the bonding tape film (S700) may be performed at 35°C to 50°C for 48 hours or more. If the bonding tape film is not aged for a sufficient period of time, the second bonding layer 320 and the base film 100 are not completely adhered to each other, and a problem of peeling or separation occurs, so that the effect according to the present invention cannot be sufficiently achieved. In addition, when the aging temperature is less than 35°C, a problem of lowering the peeling force between the second bonding layer 320 and the base film 100 may occur. On the other hand, when the aging temperature exceeds 50°C, a decrease in bonding strength of the second bonding layer 320 may be caused.

Hereinafter, the present invention will be described in more detail with reference to experimental examples.

[Experimental Example 1: Second bonding layer composition]

A composition for a bonding layer was prepared and a film was prepared as shown in Table 1 below. Specifically, a first substrate having a size of 50 mm×100 mm was prepared, and a second bonding layer composition was applied to a thickness of approximately 10 μm using a slit coating. Then, a second substrate having a size of 50 mm×100 mm was attached to the second bonding layer composition.

First description
(For release film) Second bonding layer composition 2nd description
(For base film) Acrylic copolymer
(weight%) toluene
(weight%) Ethyl acetate
(weight%) Example 1 PVC 25 15 60 PE form Example 2 PVC 28 15 57 PE form Example 3 PVC 31 17 52 PE form Example 4 PVC 34 19 47 PE form Example 5 PET 25 15 60 PE form Example 6 PET 35 18 47 PE form Comparative Example 1 PVC 23 13 64 PE form Comparative Example 2 PVC 20 11 69 PE form Comparative Example 3 PVC 27 15 58 PA form Comparative Example 4 PVC 29 16 55 PA form Comparative Example 5 PVC 26 14 60 PU form Comparative Example 6 PVC 32 18 50 PU form Comparative Example 7 PVC 24 16 60 PVC form Comparative Example 8 PVC 32 18 50 PVC form Comparative Example 9 PET 22 13 65 PE form Comparative Example 10 PET 25 15 60 PU form Comparative Example 11 PET 25 15 60 PVC form

In Table 1, PVC refers to polyvinyl chloride, PET refers to polyethylene terephthalate, PA refers to polyacrylate, and PU refers to polyurethane.

Then, the first and second substrates of the films according to Examples 1 to 6 and Comparative Examples 1 to 11 were peeled to examine the peeling state. Peeling was performed at room temperature by pulling one end of the first substrate to one side and at the same time pulling one end of the second substrate to the other side and peeling, thereby performing a 180 degree peeling test. At this time, the peeling rate was 300 mm/min.

In the films according to Examples 1 to 6, the bonding layer (the second bonding layer) remained on the upper surface of the first substrate and not at all on the lower surface of the second substrate, and was in a clean state.

On the other hand, in the case of the films according to Comparative Example 1, Comparative Example 2, and Comparative Example 9, it was confirmed that the bonding layer remained on the lower surface of the second substrate, and the surface of the bonding layer on the first substrate was not smooth. This may be because the content of ethyl acetate in the second bonding layer composition is too high.

In the case of the films according to Comparative Example 3 and Comparative Example 4, there was a problem that the bonding between the second substrate and the bonding layer was too weak. When an external force was applied, the interface between the second substrate and the bonding layer was too easily peeled off.

In the case of the films according to Comparative Examples 5 to 8, Comparative Example 10, and Comparative Example 11, it was confirmed that the bonding layer remained on the lower surface of the second substrate, and the surface of the bonding layer on the first substrate was not smooth. This may be because the bonding force between the bonding layer composition according to the present invention and the polyurethane foam and polyvinyl chloride foam is too strong.

According to the results of Experimental Example 1, the second bonding layer composition according to the present example had excellent bonding strength with polyvinyl chloride and polyethylene terephthalate as the first substrate, while excellent peeling strength with the polyethylene foam film as the second substrate. Able to know.

[Experimental Example 2: Comparison with existing bonding layer]

Polyvinyl chloride or polyethylene terephthalate was used as the first substrate and a polyethylene foam film was used as the second substrate, but the second bonding layer was used as a conventionally known adhesive to prepare a film as shown in Table 2 below. As the adhesive, a solvent-based adhesive from Burim Chemical Co., Ltd. was used.

First description
(For release film) Second bonding layer 2nd description
(For base film) Comparative Example 12 PVC BA-720 PE form Comparative Example 13 PVC BA-1030 PE form Comparative Example 14 PVC BA-1960 PE form Comparative Example 15 PET BA-270 PE form

Then, in the same manner as in Experimental Example 1, the films according to Comparative Examples 12 to 15 were peeled to examine the peeling state.

In the case of the films according to Comparative Example 12, Comparative Example 14, and Comparative Example 15, it was confirmed that the adhesive layer remained on the lower surface of the second substrate, and the surface of the adhesive layer on the first substrate was not smooth. In addition, in the case of the film according to Comparative Example 13, there was a problem that the second substrate was damaged during the peeling process.

[Experimental Example 3: Confirmation of the influence of the thickness of the second bonding layer]

A film was prepared by varying the thickness of the bonding layer as shown in Table 3 below. The second bonding layer composition used in Comparative Example 16 and Comparative Example 17 was the same as in Example 1.

Second bonding layer thickness Example 1 10㎛ Example 2 10㎛ Comparative Example 16 20㎛ Comparative Example 17 50㎛

Then, the films according to Comparative Example 16 and Comparative Example 17 were peeled in the same manner as in Experimental Example 1 to examine the peeling state.

In the case of the films according to Comparative Examples 16 and 17, it was confirmed that the bonding layer remained on the lower surface of the second substrate, and the bonding layer surface on the first substrate was not smooth.

[Experimental Example 4: Preparation of bonding tape film]

<Example 7>

A bonding tape having the structure as shown in FIG. 1 was manufactured using the material according to Example 1. That is, a polyethylene foam film was used as a base film, and a polyvinyl chloride film was used as a release film. As the first bonding layer, BA-720 of Burim Chemical was used, and the second bonding layer was configured as shown in Table 1.

And the prepared bonding tape is shown in FIG. 11.

In addition, a photograph of configuring a water tank module using the prepared bonding tape is shown in FIG. 12. As for the water tank module, a plurality of water tank units having a size of 10 L were prepared, and a bonding tape was sealed between them.

<Comparative Example 18>

A bonding tape having the structure as shown in FIG. 5 was prepared. The base film, the release film, and the first bonding layer were made of the same material as in Example 7. And the prepared bonding tape is shown in FIG. 13.

<Comparative Example 19>

A bonding tape having the structure as shown in FIG. 7 was prepared. The base film, the release film, the first bonding layer and the second bonding layer were made of the same material as in Example 7. And the prepared bonding tape is shown in Figure 14.

First, referring to FIG. 13, the bonding tape according to Comparative Example 18 was not bonded between the base film and the release film, so it was difficult to maintain the rolled state. That is, as shown in FIG. 13, the take-up roll does not maintain its shape and is unwound, resulting in inconvenience in operation.

Next, referring to FIG. 14, in the bonding tape according to Comparative Example 19, since the base film and the release film were bonded through the second bonding layer, the rolled state could be stably maintained. However, after removing the release film, the bonding layer remains on one side and the other side based on the base film, which causes inconvenience when working with the bonding tape. In order to prevent this, there is an inconvenience in the operation of removing bonding force by applying a surfactant (detergent, etc.) to an unnecessary bonding layer.

Next, referring to FIG. 11, in the bonding tape according to Example 7, since the base film and the release film were bonded through the second bonding layer, the rolled state could be stably maintained. In addition, since the second bonding layer is removed together with the release film and can be used as a single-sided bonding type bonding tape, operation convenience can be clearly improved.

In addition, referring to FIG. 12, it can be seen that a water tank module can be stably configured using a bonding tape made of a component having low moisture permeability and low solubility in water.

The embodiments of the present invention have been described above, but these are only examples and do not limit the present invention, and those of ordinary skill in the field to which the present invention pertains should not depart from the essential characteristics of the embodiments of the present invention. It will be appreciated that various modifications and applications not illustrated above are possible. Therefore, the scope of the present invention should be understood to include modifications, equivalents, or substitutes of the technical idea exemplified above. For example, each component specifically shown in the embodiment of the present invention may be modified and implemented. And differences related to these modifications and applications should be construed as being included in the scope of the present invention defined in the appended claims.

10: splicing tape
100: base film
200: release film
310: first bonding layer
320: second bonding layer

Claims (10)

Base film;
A first bonding layer disposed on the base film;
A release film disposed on the first bonding layer; And
It includes a second bonding layer disposed on the release film,
The modulus of the first bonding layer is greater than that of the second bonding layer, the thickness of the first bonding layer is greater than the thickness of the second bonding layer,
The release film has one side in contact with the second bonding layer and the other side in contact with the first bonding layer, and the release film is a state coated only on the other side, and is coated with silicone coating, polyethylene or polyolefin,
Wherein the release film has a plurality of through holes, the second bonding layer is at least partially inserted into the through hole, and the second bonding layer contacts the first bonding layer and the inner wall of the through hole One-sided splicing tape. The method of claim 1,
The base film includes a polyethylene form film,
The release film includes a polyvinyl chloride film or a polyethylene terephthalate film,
The second bonding layer is one-sided bonding type bonding tape, characterized in that it comprises an acrylic copolymer, toluene (toluene) and ethyl acetate (ethyl acetate). The method of claim 2,
The second bonding layer,
25% to 35% by weight of the acrylic copolymer,
14% to 19% by weight of the toluene, and
One-sided bonding type adhesive tape comprising 47% to 61% by weight of ethyl acetate. delete delete delete A one-sided splicing tape rolled along the length direction,
The bonding tape,
Base film;
A first bonding layer disposed on the base film;
A release film disposed on the first bonding layer; And
Including a second bonding layer disposed on the release film,
The rolled bonding tape is rolled so that the second bonding layer faces outward and the base film faces inward,
In the state where the bonding tape is rolled, the upper surface of the second bonding layer is attached in contact with the lower surface of the base film,
The modulus of the first bonding layer is greater than that of the second bonding layer, the thickness of the first bonding layer is greater than the thickness of the second bonding layer,
The release film has one side in contact with the second bonding layer and the other side in contact with the first bonding layer, and the release film is a state coated only on the other side, and is coated with silicone coating, polyethylene or polyolefin,
Wherein the release film has a plurality of through holes, the second bonding layer is at least partially inserted into the through hole, and the second bonding layer contacts the first bonding layer and the inner wall of the through hole ,
Rolled one-sided splicing tape. Applying a first bonding layer composition on one side of the base film and attaching the base film and the release film;
Applying a second bonding layer composition on the release film and winding the base film and the release film, wherein the second bonding layer composition is wound so as to contact the other surface of the base film to form a roll; And
Including the step of aging the wound roll at 35 ℃ to 50 ℃ 48 hours or more,
The modulus of the first bonding layer is greater than that of the second bonding layer, the thickness of the first bonding layer is greater than the thickness of the second bonding layer,
The release film has one side in contact with the second bonding layer and the other side in contact with the first bonding layer, and the release film is a state coated only on the other side, and is coated with silicone coating, polyethylene or polyolefin,
Wherein the release film has a plurality of through holes, the second bonding layer is at least partially inserted into the through hole, and the second bonding layer contacts the first bonding layer and the inner wall of the through hole Method for producing a one-sided bonding type bonding tape. The method of claim 8,
The composition of the first bonding layer composition and the composition of the second bonding layer composition are different,
The second bonding layer composition,
Mixing an acrylic copolymer, toluene and ethyl acetate, comprising mixing 25% to 35% by weight of the acrylic copolymer, 14% to 19% by weight of the toluene, and 47% to 61% by weight of ethyl acetate step; And
A method for producing a one-sided bonding type bonding tape, characterized in that prepared, including the step of aging the mixture at 40°C to 50°C for 48 hours or more. A plurality of water tank units; And
A water tank module comprising the bonding tape according to claim 1 as a bonding tape for sealing between the plurality of water tank units.

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