KR20120008315A - Double-sided adhesive tape and method of manufacturing the same - Google Patents

Abstract

PURPOSE: A double-sided adhesive tape is provided to reduce the defect rate of adhesive layer, to improve workability, and to have scroll shape for being rolled. CONSTITUTION: A double-sided adhesive tape comprises: a step of forming a first adhesive layer(20) on one side of a base layer(10); a step of covering the first adhesive layer by a first release layer(40); a step of forming a second adhesive layer(30) on the other side of the base layer; a step of covering the second adhesive layer by a second adhesive layer(50); and a step of rolling the double-sided adhesive layer, comprising the base layer, the first adhesive layer, the second adhesive layer, the first release layer, and the second release layer, to roll-shape.

Description

Double-sided adhesive tape and method of manufacturing the same

The present invention relates to a double-sided adhesive tape and a method of manufacturing the same.

Double-sided adhesive tape is widely used to attach a target object to an adhesive surface. In particular, in the process of manufacturing an LCD TV or LCD monitor, a double-sided adhesive tape is used to adhere some parts to the panel. Such a double-sided adhesive tape comprises a base layer, an adhesive layer formed on both sides of the base layer, and a release layer covering each adhesive layer.

Conventionally, a method of directly attaching a pressure-sensitive adhesive layer separately manufactured in a thin film shape on both sides of a base layer is used as a method of manufacturing such a double-sided adhesive tape. In this case, wrinkles are generated in the adhesive layer of the thin film in the process of attaching the adhesive layer of the thin film to the base layer.

Further, according to the prior art, the base layer of the double-sided adhesive tape is made of soft material. In this case, there is a problem that the workability is bad because the base layer easily sags or easily stretches in the process of producing the double-sided adhesive tape.

In addition, according to the prior art, when winding the double-sided adhesive tape in the form of a roll, a defective product occurred because the release paper covering the pressure-sensitive adhesive layer is easily separated from the pressure-sensitive adhesive layer. Therefore, according to the prior art, the completed double-sided adhesive tape has a problem that can not be detected in the form of a roll.

Embodiments of the present invention are to provide a double-sided adhesive tape and a manufacturing method thereof configured to reduce the poor quality of the adhesive layer.

In addition, embodiments of the present invention to provide a double-sided adhesive tape and its manufacturing method configured to improve workability.

In addition, embodiments of the present invention to provide a double-sided adhesive tape and a method for manufacturing the same configured to be wound in a roll form.

According to an aspect of the present invention, in the double-coated tape with the first adhesive layer and the second adhesive layer respectively formed on both sides of the base layer, the first adhesive layer and the second adhesive layer is formed on the base layer in a coating method A double-sided adhesive tape is provided, which is characterized by the above-mentioned.

The base layer may include a first base layer in contact with the first adhesive layer; And a second base layer bonded to the first base layer, in contact with the second adhesive layer, and made of a harder material than the first base layer.

The first base layer may be made of a sponge material or a polyurethane material, and the second base layer may be made of polyethyleneterephthalate (PET) material.

A first release layer detachably coupled to the first adhesive layer to cover the first adhesive layer; And a second release layer detachably coupled to the second adhesive layer to cover the second adhesive layer.

The second release layer may have better elasticity than the first release layer.

The first release layer may be made of polyethyleneterephthalate (PET), and the second release layer may be made of polyethylene or polyvinyl chloride (PVC).

According to another aspect of the invention, the step of forming a first adhesive layer on one surface of the base layer by an application method; Covering the first adhesive layer with a first release layer; Forming a second adhesive layer on the other surface of the base layer by an application method; Covering the second adhesive layer with the second release layer; And the base layer, the first adhesive layer, the second adhesive layer, the first release layer, and the second release layer such that the first release layer is located inside and the second release layer is located outside. A method for producing a double-sided adhesive tape is provided, the method comprising winding the double-sided adhesive tape into a roll shape.

The base layer may include a first base layer in contact with the first adhesive layer; And a second base layer bonded to the first base layer, in contact with the second adhesive layer, and made of a harder material than the first base layer.

The first base layer may be made of a sponge material or a polyurethane material, and the second base layer may be made of polyethyleneterephthalate (PET) material.

The second release layer may have better elasticity than the first release layer.

The first release layer may be made of polyethyleneterephthalate (PET), and the second release layer may be made of polyethylene or polyvinyl chloride (PVC).

According to the embodiments of the present invention, by forming the first adhesive layer and the second adhesive layer in a coating method, the conventional adhesive layer in the form of a thin film attached to the base layer is bad unlike the conventional wrinkles occurred in the adhesive layer Defects can be reduced.

In addition, since the second base layer made of a material harder than the first base layer supports the first base layer, it is possible to effectively prevent the first base layer from sagging or stretching in the process of manufacturing the double-sided adhesive tape.

In addition, the second release layer is formed to have better elasticity than the first release layer, so that the first release layer and the second release layer are reliably bonded to the first adhesive layer and the second adhesive layer, respectively. Can be wound into a scroll shape.

1 is a view schematically showing a double-sided tape according to an embodiment of the present invention,
Figure 2 is a flow chart for a double-sided adhesive tape manufacturing method according to an embodiment of the present invention,
3 is a view schematically showing a process of manufacturing a double-sided adhesive tape according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, in the following description with reference to the accompanying drawings, the same or corresponding components are given the same or corresponding reference numerals and duplicate description thereof. Will be omitted.

1 is a view schematically showing a double-sided tape according to an embodiment of the present invention. Referring to FIG. 1, the double-coated tape 1 according to the present exemplary embodiment may include a base layer 10, a first adhesive layer 20, and a second adhesive layer 30.

In more detail, the first adhesive layer 20 and the second adhesive layer 30 are formed on both surfaces of the base layer 10. The first adhesive layer 20 and the second adhesive layer 30 are formed on both surfaces of the base layer 10 in a coating manner. That is, the first adhesive layer 20 and the second adhesive layer 30 are formed by applying the adhesive on both sides of the base layer 10 and drying it. As described above, the first adhesive layer 20 and the second adhesive layer 30 are formed in a coating method, and thus, a defective film is formed by attaching a separately prepared adhesive layer to a base layer and causing wrinkles on the adhesive layer. This can be reduced.

An acrylic adhesive may be used to form the first adhesive layer 20 and the second adhesive layer 30, but is not limited thereto.

According to the present embodiment, the base layer 10 may include a first base layer 11 in contact with the first adhesive layer 20 and a second base layer 12 in contact with the second adhesive layer 30. Can be. The first base layer 11 and the second base layer 12 are bonded to each other. In this case, the first base layer 11 and the second base layer 12 may be bonded to each other by an adhesive, but are not limited thereto. The base layer 10 including the first base layer 11 and the second base layer 12 is interposed between the first adhesive layer 20 and the second adhesive layer 30.

When the double-sided adhesive tape 1 is used to attach the first object (not shown) to the second object (not shown), the first base layer 11 may cause an impact or the like between the first object and the second object. Can function to absorb. To this end, the first base layer 11 may be made of a soft material. For example, the first base layer 11 may be made of a sponge material or a polyurethane material. However, this is only an example and the first base layer 11 may be made of various kinds of soft materials other than sponge or polyurethane (PU) material.

The second base layer 12 supports the first base layer 11. To this end, the second base layer 12 is made of a harder material than the first base layer 11. For example, the second base layer 12 may be made of polyethyleneterephthalate (PET) material. However, this is only an example and the second base layer 12 may have various materials for supporting the first base layer 11 according to the material of the first base layer 11. The second base layer 12 may be combined with the first base layer 11 to effectively prevent the first base layer 11 from sagging or stretching.

According to the present exemplary embodiment, the first adhesive layer 20 may be formed to have a smaller thickness than the second adhesive layer 30. For example, assume that the same amount of pressure-sensitive adhesive is applied to the first base layer 11 and the second base layer 12 to form the first pressure-sensitive adhesive layer 20 and the second pressure-sensitive adhesive layer 30. In this case, the adhesive applied to the first base layer 11 made of a soft material is relatively absorbed into the first base layer 11, whereby a relatively thin first adhesive layer 20 is formed. In addition, the pressure-sensitive adhesive applied to the second base layer 12 made of a harder material than the first base layer 11 is absorbed relatively less into the second base layer 12, so that the second pressure-sensitive adhesive layer is relatively thick. 30 is formed. As described above, when the first adhesive layer 20 is thinner than the second adhesive layer 30, the adhesive force of the first adhesive layer 20 becomes smaller than the adhesive force of the second adhesive layer 30.

The double-sided adhesive tape 1 thus formed is the first adhesive layer 20 having a weak adhesive force when the first object (not shown) needs to be temporarily attached to the second object (not shown). It can be used in the form of applying to the object and the second adhesive layer 30 having a strong adhesive force to the second object.

Meanwhile, the double-sided adhesive tape 1 according to the present embodiment may further include the first release layer 40 and the second release layer 50.

The first release layer 40 is detachably bonded to the first adhesive layer 20. In this case, one surface of the first release layer 40 in contact with the first adhesive layer 20 may be coated so that the first release layer 40 is easily separated from the first adhesive layer 20. The first release layer 40 covers the first adhesive layer 20 until the first adhesive layer 20 is separated from the first adhesive layer 20, so that the first adhesive layer 20 is exposed to the outside and contaminated to weaken the adhesive force. Effectively prevents.

The second release layer 50 is detachably bonded to the second adhesive layer 30. In this case, one surface of the second adhesive layer 30 may be coated so that the second release layer 50 is easily separated from the second adhesive layer 30. The second release layer 50 covers the second adhesive layer 30 to effectively prevent the adhesive force of the second adhesive layer 30 from being weakened.

According to the present embodiment, the second release layer 50 is formed to have better elasticity than the first release layer 40. When the double-sided adhesive tape 1 is wound in a roll shape such that the first release layer 40 is located inside and the second release layer 50 is located outside, as shown in FIG. 1, the double-sided adhesive tape 1 is The radius of curvature of the second pressure-sensitive adhesive layer 30 is bent to become larger than the radius of curvature of the first pressure-sensitive adhesive layer 20. In this case, according to this embodiment, the second release layer 50 is formed to extend better than the first release layer 40, so that the second release layer 50 and the first release layer 40 are respectively It can be reliably bonded to the second adhesive layer 30 and the first adhesive layer 20 while stretching to a size corresponding to the radius of curvature of the second adhesive layer 30 and the first adhesive layer 20.

In contrast, assuming that the first release layer and the second release layer have the same elasticity, in the process of winding the double-sided adhesive tape, the first release layer or the second release layer is formed of the first adhesive layer or the second adhesive layer, respectively. It does not increase by the size corresponding to the radius of curvature. In this case, the first release layer or the second release layer is partially separated from the first adhesive layer or the second adhesive layer, respectively, and cannot be reliably bonded.

Therefore, in the double-sided adhesive tape 1 according to the present embodiment, the first release layer 40 and the second release layer 50 are reliably attached to the first adhesive layer 20 and the second adhesive layer 30, respectively. In a coupled state, it can be wound into a scroll shape.

In this case, the first release layer 40 may be made of polyethyleneterephthalate (PET), and the second release layer 50 may be made of polyethylene or polyvinyl chloride (PVC), but is not limited thereto.

When the double-sided adhesive tape 1 is wound into a roll shape, storage and transportation are easy.

2 is a flowchart illustrating a method of manufacturing a double-sided adhesive tape according to an embodiment of the present invention, Figure 3 is a view schematically showing a process of manufacturing a double-sided adhesive tape according to an embodiment of the present invention. 1 to 3, the method of manufacturing a double-sided adhesive tape according to the present embodiment includes forming a first adhesive layer 20 on one surface of the base layer 10 by a coating method (S110), and first adhesive. Covering the layer 20 with the first release layer 40 (S130), forming a second adhesive layer 30 on the other surface of the base layer 10 by the coating method (S150), and the second Covering the adhesive layer 20 with the second release layer 50 (S170), and winding the double-sided adhesive tape 1 in the form of a roll (S190). Hereinafter, in describing the method for manufacturing a double-sided adhesive tape according to the present embodiment, the base layer 10, the first adhesive layer 20, the second adhesive layer 30, the first release layer 40, and the second release mold Features relating to layer 50 are replaced by the description for double-sided adhesive tape 1 described above.

In more detail, in the step (S110) of forming the first adhesive layer 20 on one surface of the base layer 10 by the coating method, the base layer 10 is supplied, the pressure-sensitive adhesive on one surface of the supplied base layer 10 (Not shown) is applied. In this case, the pressure-sensitive adhesive is supplied from the pressure-sensitive adhesive supply portion 61. The adhesive applied to one surface of the base layer 10 is dried by the adhesive drying part 62. The pressure-sensitive adhesive drying unit 62 may dry the pressure-sensitive adhesive by supplying hot air to the pressure-sensitive adhesive applied to the base layer 10 or irradiating infrared rays. In this case, it is preferable to keep the temperature for drying an adhesive below 130 degreeC. If the temperature of drying the adhesive is more than 130 degrees, the adhesive drying temperature is preferably lower than 130 degrees because the base layer 10 made of polyurethane or polyethylene terephthalate may be melted or denatured. Do. When the adhesive drying process is completed, the first adhesive layer 20 is formed on one surface of the base layer 10.

Next, in step (S130) of covering the first adhesive layer 20 with the first release layer 40, the first adhesive layer 20 formed on one surface of the base layer 10 may be the first release layer 40. Covered by). In this case, the first release layer 40 may be pressed by the pressing roller 63 to be bonded to the first adhesive layer 20.

Next, in the step (S150) of forming the second adhesive layer 30 on the other surface of the base layer 10 by the coating method, an adhesive (not shown) is applied to the other surface of the base layer 10 and dried. In this case, the pressure-sensitive adhesive applied to the other surface of the base layer 10 is supplied by the pressure-sensitive adhesive supply part 66, and the pressure-sensitive adhesive applied to the other surface of the base layer 10 is dried by the pressure-sensitive adhesive drying part 67. This step (S150) may be made in the same manner as the step (S110) to form the first adhesive layer 20 described above.

Next, in step S170 of covering the second adhesive layer 30 with the second release layer 50, the second adhesive layer 30 formed on the other surface of the base layer 10 is the second release layer 50. ) May be combined. In this case, the second release layer 50 may be compressed by the pressing roller 68 and bonded to the second adhesive layer 30.

Next, in the step (S190) of winding the double-sided adhesive tape 1 in a roll shape, the base layer 10, the first adhesive layer 20, the second adhesive layer 30, the first release layer 40 And the double-sided adhesive tape 1 including the second release layer 50 is wound in a roll shape so that the first release layer 40 is located inside and the second release layer 50 is located outside. In this case, the second release layer 50 is formed to have better elasticity than the first release layer 40, so that the first release layer 40 and the second release layer 50 are each the first adhesive layer 20. ) And the double-sided adhesive tape 1 may be wound in a roll shape in a state of being reliably coupled to the second adhesive layer 30.

On the other hand, the manufacturing equipment for implementing the double-sided adhesive tape and the manufacturing method according to the present embodiment is not limited to the contents shown in Figure 3 may be used a variety of manufacturing equipment.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

10: base layer
11: first base layer
12: second base layer
20: first adhesive layer
30: second adhesive layer
40: first release layer
50: second release layer

Claims (11)

In the double-sided tape in which the 1st adhesion layer and the 2nd adhesion layer were formed in both surfaces of the base layer, respectively,
And the first adhesive layer and the second adhesive layer are formed on the base layer by a coating method.
The method of claim 1,
The base layer,
A first base layer in contact with the first adhesive layer; And
And a second base layer bonded to the first base layer, in contact with the second adhesive layer, and made of a harder material than the first base layer.
The method of claim 1,
The first base layer is made of a sponge material or polyurethane (polyurethane) material,
The second base layer is a double-sided adhesive tape, characterized in that made of polyethylene (polyethyleneterephthalate) material.
The method according to claim 1, wherein
A first release layer detachably coupled to the first adhesive layer to cover the first adhesive layer; And
And a second release layer detachably coupled to the second adhesive layer to cover the second adhesive layer.
The method of claim 4, wherein
And the second release layer has better elasticity than the first release layer.
The method of claim 5,
The first release layer is made of polyethyleneterephthalate (PET) material,
The second release layer is a double-sided adhesive tape, characterized in that made of polyethylene (polyethylene) or polyvinyl chloride (PVC) material.
Forming a first adhesive layer on one surface of the base layer by an application method;
Covering the first adhesive layer with a first release layer;
Forming a second adhesive layer on the other surface of the base layer by an application method;
Covering the second adhesive layer with the second release layer; And
Both sides including the base layer, the first adhesive layer, the second adhesive layer, the first release layer and the second release layer so that the first release layer is located inside and the second release layer is located outside. A method of producing a double-sided adhesive tape, the method comprising the steps of winding the adhesive tape into a roll shape.
The method of claim 7, wherein
The base layer,
A first base layer in contact with the first adhesive layer; And
And a second base layer bonded to the first base layer, in contact with the second adhesive layer, and made of a harder material than the first base layer.
The method of claim 8,
The first base layer is made of a sponge material or polyurethane (polyurethane) material,
The second base layer is a double-sided adhesive tape, characterized in that made of polyethylene (polyethyleneterephthalate) material.
The method according to any one of claims 7 to 9,
The second release layer has a better elasticity than the first release layer, characterized in that the double-sided adhesive tape manufacturing method.
The method of claim 10,
The first release layer is made of polyethyleneterephthalate (PET) material,
The second release layer is made of polyethylene (polyethylene) or polyvinyl chloride (PVC) material, characterized in that the double-sided adhesive tape manufacturing method.

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