KR100801222B1 - Double-sided tape with adhesive layer of different adhesive strength and its manufacturing method - Google Patents

Abstract

The present invention relates to a double-sided tape having an adhesive layer of different adhesive strength and a method of manufacturing the same.

In particular, the first adhesive layer and the second adhesive layer having a lower adhesive strength than the first adhesive layer is made of a configuration that is formed on both sides of the base paper, respectively.

Accordingly, it is easy to attach, does not damage the surface to be deposited when removed, it is possible to recycle when contamination.

Description

A Double-Faced Tape With Different in Adhesive Strength on Each Face And Method for Manufacturing Thereof}

1 is a cross-sectional view showing a pressure-sensitive adhesive sheet using a conventional release paper.

Figure 2 is a cross-sectional view showing a double-sided tape according to the present invention.

Figure 3 is a cross-sectional view showing a double-sided tape according to another embodiment of the present invention.

4A and 4B are perspective views each showing a rolled-up state of a double-sided tape according to the present invention.

5 and 6 is a manufacturing process of the double-sided tape according to FIG.

7 is a flowchart for manufacturing a double-sided tape according to the present invention.

* Description of the symbols for the main parts of the drawings *

100 ... base 130 ... first adhesive layer

150 ... 2nd adhesive layer 210,230 ... release paper

410, 450 ... Adhesive layer forming unit 470 ... Inversion roller

490 ... UV reaction chamber

The present invention relates to a double-sided tape having an adhesive layer having a different adhesive strength and a method of manufacturing the same, and more particularly, to a first adhesive layer and a second adhesive layer having less adhesive strength than the first adhesive layer on both sides of the base paper. This structure is formed so as to be able to maintain a constant adhesive force irrespective of the attachment conditions, it is easy to attach, do not damage the adhered surface when removing the tape, and has an adhesive layer of different adhesive strength to be recycled in case of contamination It relates to a double-sided tape and a method of manufacturing the same.

In general, the adhesive tape forms an adhesive layer on one side of the resin film and is attached to and preserved with a release material. The release material is made of paper or stretched resin film (eg, stretched PET, OPP, etc.).

The tape for attachment is integrally formed on one side of the printed surface such as a picture and a picture to be protected, and attached to the wall surface or formed into a shape using a separate attachment material such as glass tape or double-sided tape. When attached to the front and back of the material is attached to the wall material.

However, in the case of the attachment method as described above, when affixing to a transparent material such as a glass window or a glass door, the aesthetic damage caused by the attachment material may damage the aesthetics of the space to which the printed material intended to be used for advertisement or decoration is rather damaged. There have been problems such as not providing convenience to users.

In order to solve such a problem, the registration utility model No. 285153 discloses a double-sided adhesive surface protection sheet 10, the configuration of which is formed of a feeder or synthetic resin as shown in Figure 1, a release agent used for single use A protective film 1 of a transparent body coated with an adhesive layer 2 made of an adhesive is attached to one surface of the release paper 3 coated with (3a), and the protective film 1 is made of an environmentally friendly material (PP, PE). It is composed of a) to form an adhesive layer (2) on both sides, respectively, and to attach the release paper (3) coated with a release agent (3a) to the outside.

The double-sided adhesive sheet for surface protection is configured as described above, by attaching the double-sided sheet 10 to the back of the printed material formed by photos, pictures and letters to the site to be attached to the adhesive layer (2) of the double-sided sheet 10 To attach.

However, the sheet as described above, the adhesive layer is formed on both sides of the double-sided sheet with the same material, so that the adhesive layer attached to any one side of the double-sided sheet is separated when the sheet is separated so that the groove surface is raised on the surface of the sheet. This occurs, and there is a disadvantage in that a part of the adherend is attached when the separation is difficult to repeatedly use the sheet.

An object of the present invention having the configuration described above is to provide a double-sided tape using a photocurable pressure-sensitive adhesive composition filed by the applicant of the present invention, and adhesiveness using a photocurable pressure-sensitive adhesive composition containing a silicone-modified acrylate as a main component The surface is not contaminated even with excellent and repeated desorption, and the adhesive is transferred to the adhered surface or the damage of the adhered surface by transfer is prevented, and the adhesive force is restored when removing foreign substances, and the stability and denaturation of physical properties It is to provide a double-sided tape having an adhesive layer of different adhesive strength to improve the productivity while blocking the and a method of manufacturing the same.

In order to achieve the above object, the present invention has a double-sided adhesive layer having different adhesive strengths, wherein the first adhesive layer and the second adhesive layer having less adhesive strength than the first adhesive layer are laminated on both sides of the base paper, respectively. Provide a tape.

In another aspect, the present invention, forming a first adhesive layer on one side of the base paper;

Attaching a release paper on the upper side of the first adhesive layer;

Inverting the base paper to which the release paper is attached and applying a photocurable adhesive to the other side of the base paper;

The present invention provides a method for producing a double-sided tape having an adhesive layer having different adhesive strength, wherein the photocurable adhesive is irradiated with light to form a second adhesive layer.

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

Figure 2 is a cross-sectional view showing a double-sided tape according to the present invention, Figure 3 is a cross-sectional view showing a double-sided tape according to another embodiment of the present invention, Figure 4a, b is a roll-shaped wound state of the double-sided tape according to the present invention, respectively 5 and 6 are a manufacturing process diagram of the double-sided tape according to Figure 4, Figure 7 is a flow chart for producing a double-sided tape according to the present invention.

In the double-sided tape of the present invention, the first adhesive layer 130 and the second adhesive layer 150 having less adhesive strength than the first adhesive layer 130 are laminated on both sides of the base paper 100, respectively.

At this time, the release paper 210, 230 is attached to the outside of the first adhesive layer 130 and the second adhesive layer 150 for convenience of use, respectively.

The base paper 100 uses a stretched resin film (stretched PET, OPP, PE, etc.).

In addition, the said 1st adhesive layer 130 uses an acrylic emulsion permanent adhesive as a normal acrylic pressure-sensitive adhesive.

The second adhesive layer 150 may include at least one or more acrylates or methacrylates, and photocurable silicone-modified acrylate oligomers in which the main chain contains polydimethyl siloxane; A polyfunctional acrylate monomer polymerized with the photocurable acrylate oligomer and having at least one or more acrylate or methacrylate groups in a molecule; And a photopolymerization initiator for initiating photopolymerization of the photocurable silicone-modified acrylate oligomer and the multifunctional acrylate monomer.

In addition, a recess 135 is integrally formed at one side of the second adhesive layer 150 so as to be distinguished from the layer to which the adhesive is attached on the glass surface when the double-sided tape is separated, so that a special mark layer can be formed when the double-sided sheet is removed. It will be.

The double-sided tape manufacturing process of the present invention having the laminated structure as described above will be described below.

5 to 7, the present invention first forms a first adhesive layer 130 on one side of the base paper 100.

At this time, since the base paper 100 is excellent in smoothness by using a stretched resin film (stretched PET, PP, OPP, etc.), the surface maintains the mirror surface shape, and the base paper 100 is fed in a roll shape. .

Then, the base paper 100 is passed through the adhesive layer forming unit 410, the pressure-sensitive adhesive made of an acrylic pressure-sensitive adhesive is applied to the upper surface and then heated to a temperature of 150 ~ 250 ℃, pressurized as a pressure roller flat 1, the adhesive layer 130 is formed, a release agent layer is integrally formed on the pressure roller to enable uniform compression through rotation.

At this time, the pressure sensitive adhesive for forming the first adhesive layer 130 is an emulsion permanent pressure sensitive adhesive which is a normal acrylic pressure-sensitive adhesive.

Subsequently, the base paper 100 on which the first adhesive layer 130 is formed is also continuously supplied in the form of a sheet, thereby easily stacking the release paper 210 on top of the first adhesive layer 130 to pass through the guide roll. Allow one transfer.

In addition, the release paper 210, the release agent is pre-treated so as to easily peel off from the pressure-sensitive adhesive, the release agent is a polysiloxane in which a methyl group or an organic group of a phenol group is bonded to silicon atoms with a siloxane bonded to silicon and carbon. .

And, the substrate used in the release paper is a variety of uses depending on the use, but in the present invention, any one selected from polylaminated paper, glazing paper, kraft paper, polyethylene paper, polypropylene paper is used, the release paper is also rolled Is committed.

Subsequently, the lamination of the release paper to the upper portion of the first adhesive layer 130 laminated on the base paper 100 is completed, the base paper having the laminated structure as described above is inverted through the inversion roller 470, and then the second adhesive layer. The photocurable adhesive is applied to the other side of the base paper 100 through the formation unit 450.

At this time, the photocurable pressure-sensitive adhesive, photocurable silicone-modified acrylate oligomer having at least one or more acrylate or methacrylate, the main chain contains a polydimethyl siloxane; A polyfunctional acrylate monomer polymerized with the photocurable acrylate oligomer and having at least one or more acrylate or methacrylate groups in a molecule; And a photopolymerization initiator for initiating photopolymerization of the photocurable silicone-modified acrylate oligomer and the multifunctional acrylate monomer.

The second adhesive layer 150 is formed by irradiating ultraviolet rays at a temperature of 60 to 90 ° C. while allowing the photocurable pressure sensitive adhesive to pass through the ultraviolet chamber 490.

In this case, the release paper 230 described above is also laminated on the second adhesive layer 150.

The double-sided tape having the above configuration is finally wound and used in a roll shape, and when the double-sided tape is directly used for the skin complex, it is not necessary to stack a separate release paper 230 as shown in FIG. When used as a plate used to attach a separate release paper 230 as shown in Figure 3a.

In addition, the photocurable silicone-modified acrylate oligomer is a silicon epoxy compound; And acrylate or methacrylate containing at least one or more carboxylic acids.

On the other hand, the double-sided tape of the present invention is integrally formed with a recess having a predetermined marking function on the second adhesive layer to form a constant marker layer on the surface of the mirror or the like by the contamination when separating the double-sided tape.

Comparative example

Looking at the adhesive strength of the first adhesive layer in contrast to the second adhesive layer of the present invention is as follows.

The adhesive strength measurement of the first adhesive was also pretreated at a temperature of 23 ± 2 ℃ and a relative humidity of 50 ± 5%, and then pressurized with a roller specified in 2KS M 6784 to test plates made of specimen glass plates, and then specified in KS B 5521. It was tested by a tensile tester.

As a result, when the initial deposition temperature is 5 ℃ or more was measured to 7N / 25mm in the temperature range of -20 ℃ ~ 80 ℃.

On the other hand, in order to test the characteristics of the adhesive constituting the second adhesive layer of the present invention, the room temperature state, the heating state of 80 ± 2 ℃, the dehumidification state of 20 ± 2 ℃ × 950 ± 5% RH, cooling of -40 ± 2 ℃ Condition, cold and repeated condition, accelerated exposure state test by WS-A was performed, and after completing the test, a test was performed to determine whether the adhesive remained by removing the specimen from the test plate.

Test Example 1

The adhesiveness of the second adhesive layer prepared according to the present invention was tested, and the test conditions consisted of a specimen glass plate with a roller specified in 2KS M 6784 after pretreatment of the sample at a temperature of 23 ± 2 ° C. and a relative humidity of 50 ± 5%. After pressurizing the test plate, it was tested with a tensile tester specified in KS B 5521.

In addition, tests at room temperature, heated at 80 ± 2 ℃, dehumidified at 20 ± 2 ℃ × 950 ± 5% RH, cooled at -40 ± 2 ℃, repeated repetition at cold state and accelerated exposure by WS-A After the completion of the test, the test piece was removed from the test plate to check whether the adhesive remained.

As a result, the present invention is shown in Table 1 below.

TABLE 1

Test Items unit Result (detection limit) Test Methods Remarks Adhesion (room temperature) N / 25mm 0.071 KS A 1107: 2004 Appearance (after adhesion test) - clear Visually Adhesion (after heat resistance test) N / 25mm 2.696 KS A 1107: 2004 Appearance (after heat adhesion test) - clear Visually Adhesion (After Moisture Resistance Test) N / 25mm 0.045 KS A 1107: 2004 Appearance (after moisture adhesion test) - clear Visually Adhesion (After Cold Resistance Test) N / 25mm 0.057 KS A 1107: 2004 Outward appearance (after cold resistance test) - clear Visually Adhesion (After Cold Heat Repeat Test) N / 25mm 4.180 KS A 1107: 2004 Appearance (after cold heat adhesion test) - clear Visually Adhesion (After Accelerated Exposure Test) N / 25mm 3.252 KS A 1107: 2004 KS A 2274: 2002 Appearance (After Promoting Exposure Adhesion Test) - clear Visually

As described above, the present invention is that there is no dust on the surface while maintaining the adhesive force required by the KS standards.

In addition, as in the comparison, the adhesive strength is maintained different from that of the first adhesive layer so that the second adhesive layer can be easily separated from the skin adhesion surface to which the second adhesive layer is attached.

In the second adhesive layer of the present invention, there is little change in the adhesive performance difference at ordinary temperature and the adhesive performance difference under various conditions.

Test Example 2

The harmfulness of the adhesive forming the second adhesive layer of the present invention was tested, and the detection state of Pb, Cd, Hg, and Cr was tested using an ICP test facility (Model JY-80C), and the results are shown in Table 2 below. Same as

TABLE 2

Test Items unit Result (detection limit) Test Methods Remarks Pb mg / kg Not detected (5mg / kg) ISO 6101- [2: 1997 CD mg / kg Not detected (1mg / kg) BS EN 1122: 2001 Hg mg / kg Not detected (1mg / kg) US EPA 3052: 1996 Cr mg / kg Not detected (2mg / kg) DIN 53314: 1996

As described above, the present invention does not detect any heavy metals that are harmful to the environment.

As described above, according to the present invention, the applicant of the present invention provides a double-sided tape using a photocurable pressure-sensitive adhesive composition registered therein, and has excellent adhesiveness and repetition by using a photocurable pressure-sensitive adhesive composition mainly containing silicone-modified acrylate. The surface is not contaminated even if it is attached or detached, and the adhesive is transferred to the adhered surface or the damage of the adhered surface is prevented by the transfer, and the adhesive force is restored when removing foreign substances, and the productivity is improved while blocking the stability and denaturation of physical properties. will be.

While the invention has been shown and described with respect to one embodiment, it will be appreciated that the invention can be variously modified and modified without departing from the spirit or scope of the invention as provided by the following claims. It will be clear to those skilled in the art that it can be easily understood.

Claims (9)

The first adhesive layer and the second adhesive layer having a lower adhesive strength than the first adhesive layer is made of a configuration that is laminated on both sides of the base paper, respectively, The base paper is made of a stretched resin film, The first adhesive layer is made of an acrylic pressure-sensitive adhesive, The second adhesive layer has at least one or more acrylates or methacrylates, the main chain is a photocurable silicone-modified acrylate oligomer containing polydimethyl siloxane; A polyfunctional acrylate monomer polymerized with the photocurable acrylate oligomer and having at least one or more acrylate or methacrylate groups in a molecule; And a photopolymerization initiator for initiating photopolymerization of the photocurable silicone-modified acrylate oligomer and the multifunctional acrylate monomer, the double-sided tape having an adhesive layer having different adhesive strengths, The second adhesive layer is a double-sided tape having an adhesive layer of different adhesive strength, wherein recesses are integrally formed. delete The photocurable silicone-modified acrylate oligomer of claim 1, further comprising: a silicon epoxy compound; And a double sided tape having an adhesive layer having different adhesive strengths, wherein the acrylate or methacrylate including at least one carboxylic acid is polymerized. delete The double-sided tape having an adhesive layer of different adhesive strength according to claim 1, wherein the double-sided tape is wound in a roll shape. A double-sided tape manufacturing method for forming an adhesive layer made of an acrylic pressure-sensitive adhesive on each side of the base paper to form a second adhesive layer on the other side of the base paper on which the first adhesive layer is laminated so as to be molded within the molding temperature of the first adhesive layer. To The second adhesive layer is a method of manufacturing a double-sided tape having an adhesive layer of different adhesive strength, characterized in that after applying the release paper on the upper side of the first adhesive layer and inverted it is applied. delete The method of claim 6, wherein the second adhesive layer is formed by UV curing after application of the photocurable pressure sensitive adhesive. The method of claim 6, wherein the first and second adhesive layers are laminated on the upper surface of the base paper by a step of applying a pressure-sensitive adhesive on the upper surface of the base paper, which is introduced into the roll shape in a continuous process, and then curing it. Method for producing a double-sided tape having an adhesive layer of different adhesive strength, characterized in that the release paper is put into a roll is laminated

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