WO2003042313A1

WO2003042313A1 - Adhesive sheet and method for producing the same

Info

Publication number: WO2003042313A1
Application number: PCT/JP2002/004614
Authority: WO
Inventors: Hiromu Iwakawa
Original assignee: Chuetsu Tech Co., Ltd.
Priority date: 2001-11-12
Filing date: 2002-05-13
Publication date: 2003-05-22
Also published as: JP3548931B2; JP2003147293A

Abstract

An adhesive sheet comprising a sheet body (1), an adhesive layer applied to the sheet body (1), and a large number of isolation members (3, 3, ...) formed in parallel, at a desired interval, to stand up from the surface of the adhesive layer. When the sheet is applied to an object, it exhibits a sufficient adhesion only when it is pressed with a force of a specified level or above. Since bubbles generated when the sheet is positioned or applied under temporarily bonded state, can be removed, even an unskilled person can apply the sheet onto an object, e.g. a wall, beautifully and easily.

Description

Description Adhesive sheet and method for producing the same

The present invention relates to an adhesive sheet mainly used for interiors of buildings and the like, which is adhered to an adherend by pressing the adherend with a certain or more pressing force, and a method for producing the adhesive sheet. . Background art

In general, the interior of the building's inner wall is made by attaching a decorative sheet with embossed or printed decoration on the surface of the panel for the inner wall fixed to a pillar or the like. Sheets have been commercialized, for example, in which an adhesive is applied in advance on the back surface to provide an adhesive layer, and the adhesive layer is coated with a release protective paper that can be peeled off without impairing the adhesiveness. It is difficult for laymen to put these on, and it is mainly done by skilled craftsmen.

However, in the conventional technology as described above, since the adhesive layer of the sheet is flatly applied to the entire back surface of the sheet, it is difficult to peel off the sheet once it is attached to the panel. If it is misaligned, it is difficult to correct it, and even if it comes off, the adhesive sticks to the panel surface and remains, making it impossible to attach the sheet again. Furthermore, air bubbles tend to be generated between the sheet and the panel during sticking, and it has been difficult to remove these air bubbles.

Therefore, if you want to finish the wall beautifully, it is difficult for the layman to stick the sheet, and the work must rely on craftsmen with high specialized skills, which increases the construction cost. There was a problem.

An object of the present invention is to provide an inexpensive adhesive type that can be beautifully and easily installed by amateurs. An object of the present invention is to provide a sheet and a method for producing the pressure-sensitive adhesive sheet. Disclosure of the invention

In order to achieve the above object, the pressure-sensitive adhesive sheet according to the present invention comprises a sheet body, a pressure-sensitive adhesive layer applied to the sheet body in a superimposed manner, and a raised state from the surface of the pressure-sensitive adhesive layer. A large number of separating members arranged in parallel at desired intervals. The sheet body may include a blocking layer for blocking the pressure-sensitive adhesive between the sheet body and the pressure-sensitive adhesive layer.

An elastic material having elasticity and capable of being impregnated with an adhesive is overlaid on the sheet body, and the elastic material is impregnated with the adhesive to form an adhesive layer.

It is possible to form a weak adhesive layer on the surface of the separating member.

The sheet body, the blocking layer, the elastic layer, and the separating member can be formed of a polyolefin-based resin.

Peelable release protection paper can be laminated and attached to the elastic layer via the separating member without impairing the adhesiveness of the adhesive.

Further, in the method for producing a pressure-sensitive adhesive sheet according to the present invention, a pressure-sensitive adhesive is applied to a sheet body to form a pressure-sensitive adhesive layer, and then the molten synthetic resin material continuously and linearly extruded from a die is moved. The linear laminating process of continuously adhering to the surface of the pressure-sensitive adhesive layer of the sheet body described above allows a large number of separating members arranged in parallel at desired intervals to be formed on the surface of the pressure-sensitive adhesive layer by the pressure-sensitive adhesive. It is formed so as to be raised from the surface of the agent layer.

A blocking layer for blocking the adhesive can be provided on the sheet body.

An elastic material having elasticity and capable of impregnating with an adhesive is provided on the sheet body in an overlapping manner, and the elastic material can be impregnated with the adhesive to form an adhesive layer. Further, in the method for producing a pressure-sensitive adhesive sheet according to the present invention, a flexible material having elasticity with respect to the sheet body and capable of impregnating the pressure-sensitive adhesive is provided in an overlapping manner, and is continuously formed linearly from the die. The extruded molten synthetic resin is continuously adhered to the surface of the elastic body of the moving sheet body by a linear laminating process. After forming the separating member in a state of being raised from the surface of the elastic material, the adhesive is impregnated into the elastic material, and the adhesive attached to the surface of the separating member is thinly removed and left off. It is also possible to form a weak adhesive layer on the surface of the separating member.

Other objects and features of the present invention will become apparent from the following description based on the accompanying drawings. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a cross-sectional view showing an example of an adhesive sheet according to the present invention, FIG. 2 is a cross-sectional view showing a temporarily attached state of the adhesive sheet of the above, and FIG. FIG. 4 is a cross-sectional view showing a state of attachment, FIG. 4 is a side view schematically showing a manufacturing apparatus used for the method of manufacturing an adhesive sheet according to the present invention, FIG. Fig. 6 is a cross-sectional view showing the same state of impregnation with the pressure-sensitive adhesive, Fig. 7 is a perspective view showing the same state of linear laminating, and Fig. 8 is a method for producing a pressure-sensitive adhesive sheet according to the present invention. FIG. 9 is a cross-sectional view showing another example of the pressure-sensitive adhesive impregnated state, FIG. 9 is a cross-sectional view showing an example of the pressure-sensitive adhesive sheet according to the above method, and FIG. 10 is a cross-sectional view showing another example of the pressure-sensitive adhesive sheet according to the present invention. FIG. 11 is a cross-sectional view showing the state of a step of forming a barrier layer of the pressure-sensitive adhesive sheet of the above, and FIG. 12 is a pressure-sensitive adhesive of the above. Sectional view showing the state of Chakukotei, first FIG. 3 is a sectional view showing still another example of the pressure-sensitive adhesive type sheet according to the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

The present invention will be described in more detail with reference to the accompanying drawings. FIG. 1 schematically shows an example of an adhesive sheet. In the figure, reference numeral A denotes an adhesive sheet.Adhesive sheet A is formed by impregnating a sheet body 1 and a flexible material 2 with an adhesive. Is , And a number of separating members 3, 3... Arranged in parallel at desired intervals in a state of being raised from the surface of the adhesive layer. On the surface of the pressure-sensitive adhesive layer, protective release paper 4 is superposed with separating members 3, 3,...

The sheet body 1 is formed into a sheet shape using a polyolefin resin such as polyethylene or a PET resin. The surface is embossed or printed for decoration. On the other hand, on the back surface of the sheet body 1, a blocking layer 5 is formed in a film shape from a polyolefin resin or a PET resin. The blocking layer 5 is located between the sheet body 1 and the elastic layer 2 impregnated with the adhesive, and blocks the flow of air, water, adhesive and the like between each other.

The elastic member 2 is made of a nonwoven fabric or a foamed polyethylene made of polyolefin resin, has elasticity, and can be impregnated with an adhesive. The width of the isolation member 3 is 0.5 mn! From the surface of the pressure-sensitive adhesive layer 2 formed by impregnating a pressure-sensitive material with a pressure-sensitive adhesive in a very fine line of about 3 mm, 0, l mn! It is formed in a raised state of 0.5 mm. The separating members 3, 3 adjacent to each other are arranged in parallel at desired intervals (2 mm to 20 mm).

In the pressure-sensitive adhesive sheet A, since the separating members 3, 3,... Are raised from the surface of the pressure-sensitive adhesive layer formed by impregnating the elastic material 2 with the pressure-sensitive adhesive, as shown in FIG. A gap 7 is formed between the pressure-sensitive adhesive layer and the adherend 6. Therefore, when the protective release paper 4 is peeled off and used on an adherend, such as a wall or a board, the surface of the adhesive layer is adhered to the adherend 6 unless a certain pressing force is applied thereto. No contact with 6, adhesive does not show sufficient adhesive strength. On the other hand, when the pressure-sensitive adhesive sheet A is pressed against the adherend 6 with a certain pressing force or more, as shown in FIG. 3, the separating members 3, 3,. It sinks into the elastic material 2 of the adhesive layer. Therefore, there is no gap 7 between the pressure-sensitive adhesive layer formed by impregnating the elastic material 2 with the pressure-sensitive adhesive and the adherend 6, and the adhesive impregnated in the elastic material 2 has a bonding surface of the adherend 6. And the adhesive sheet A has sufficient adhesive strength to the adherend 6 Applied and stuck.

Next, a method for producing the above-mentioned pressure-sensitive adhesive sheet will be described.

FIG. 4 shows an outline of an apparatus for producing an adhesive sheet, which is a single line in which a barrier layer forming machine 10, an adhesive applying machine 11, and a linear laminating machine 12 are continuous. Is configured as The sheets are sequentially moved by moving means including rollers and the like.

The barrier layer forming machine 10 includes an extruder 13 for extruding the molten synthetic resin material, a barrier layer forming die 14 attached to the extruder 13, and pressing means 1 for pressing the sheet with a desired pressure. 5 is provided.

The blocking layer forming die 14 is attached to the tip of the extruder 13. The blocking layer forming die 14 is provided with a resin discharge hole 16 formed in a continuous slit shape on the lower surface. By laminating the melted synthetic resin material onto the moving sheet from the resin discharge hole 16 continuously, the entire surface of the sheet is subjected to laminating. The elastic material 2 can be attached to the sheet body 1 by laminating the elastic material 2 in a state where the synthetic resin material is melted.

The pressing means 15 is provided with a pair of rollers (cooling roll 17, press opening 18) which are close to each other, and by passing between the cooling roll 17 and the press roll 18. Pressure is applied to the sheet to be passed. The adhesive applying machine 11 includes an applying means 19 for applying an adhesive to the sheet body 1 or the elastic material 2, and a drying furnace 20 for heating and curing the sheet body on which the adhesive is applied. And.

The attaching means 19 is constituted by, for example, an automatic applicator called an adhesive coater shown in FIG. The adhesive coater includes a feed roller 21 and an adhesive tray 22.

The pressure-sensitive adhesive tray 22 can adjust the distance to the feed roller 21. In the figure, the surface of the elastic material 2 is the adhesive 2 2 a in the adhesive tray 2 2. The sheet is sent out by the feed roller 21 and passed through the adhesive tray 2 2 containing the adhesive 2 2 a, so that the adhesive 2 2 a becomes the elastic material 2. It is to be applied and impregnated.

In addition, the attaching means 19 may be a means using a transfer method in addition to the one constituted by the adhesive coater described above. An application means using such a transfer method is to apply a pressure-sensitive adhesive in advance on a release paper which can be peeled off without deteriorating the adhesiveness of the pressure-sensitive adhesive, to form a sheet for pressure-sensitive adhesive transfer, The adhesive is transferred from the adhesive transfer sheet to the elastic material 2 and impregnated.

The linear laminating machine 12 is composed of an extruder 23 for extruding a molten synthetic resin material, a linear laminating die 24 attached to the extruder 23, and a sheet applying a desired pressure. And press means 25 for pressing.

The linear laminating die 24 is attached to the tip of the extruder 23. As shown in FIG. 7, the linear laminating die 24 is formed with a large number of discharge holes 26, 26,... . The synthetic resin material melted into the sheet is continuously and linearly extruded from the discharge holes 26. In this way, the synthetic resin material melted from the linear laminating die 24 is continuously extruded in a linear shape, and adhered to the surface of the adhesive layer (elastic material 2). The arranged linear laminating process can be performed. The linear laminating die 24 is formed by attaching a forming adapter having discharge holes formed at desired intervals on the lower surface to a forming die body having slit-shaped discharge holes connected to the lower surface. It may be one that can perform linear laminating.

The pressing means 25 is provided with a pair of rollers (a cooling port 27 and a pressing port 28) which are close to each other, and is passed between the cooling roll 27 and the press roll 28. As a result, pressure is applied to the passing sheet. A method for producing the pressure-sensitive adhesive sheet according to the present invention using the above apparatus will be described. First, as shown in FIG. 5, the sheet body 1 is sent to the barrier layer forming machine 10 and an elastic material (nonwoven fabric, foamed polyethylene, etc.) 2 is sent from the opposite side of the sheet body 1 to the sheet body 1. Immediately after the laminating synthetic resin material made of polyethylene resin or the like is allowed to flow down from the insulating layer forming die 14, the sheet body 1, the synthetic resin material, and the elastic material 2 are overlapped. Next, the laminated products are sequentially fed to a pressing means 15 and pressurized, and the laminated resin is cooled and solidified to form a film-shaped barrier layer 5 between the sheet body 1 and the elastic material 2. At the same time, the sheet body 1, the shielding layer 5, and the elastic material 2 are integrally bonded.

Next, the sheet body 1 on which the elastic material 2 is bonded is sent to the adhesive applying machine 11, and the adhesive is applied to the elastic material 2 by the applying means 19 to be impregnated. When an adhesive coater is used as the attaching means 19, as shown in FIG. 6, the sheet body 1 integrally having the elastic layer 2 is sent out by the feed roller 21 and the adhesive tray 2 2 Let through. By doing so, the pressure-sensitive adhesive 2 2 a is adhered to and impregnated on the elastic material 2, and the pressure-sensitive adhesive layer in which the elastic material 2 is impregnated with the pressure-sensitive adhesive is formed on the sheet body 1 via the blocking layer 5. It has become so.

When a transfer method is used as the attaching means 19, the adhesive transfer sheet is attached to the surface of the elastic material, and the transfer is promoted by applying a calo-pressure or heating to the elastic material. The adhesive is transferred and impregnated.

Next, the sheet body 1 on which the adhesive layer is adhered by impregnating the adhesive into the adhesive 2 is sent to the drying path 20 and heated at a predetermined temperature to cure the adhesive.

After the pressure-sensitive adhesive is cured, the sheet body 1 is sent to a linear laminating machine 12 and subjected to linear laminating according to the following procedure as shown in FIG. On the surface of the adhesive layer formed by impregnating the elastic material 2 with the adhesive, a synthetic laminating material for laminating made of polyethylene resin melted from a linear laminating die 24 on the surface of the adhesive layer. Continuously extruded linearly against the sheet body 1, containing adhesive in the elastic material 2 A synthetic resin material is continuously adhered to the surface of the pressure-sensitive adhesive layer formed by immersion. Next, in this state, the sheet body is passed through a pressing means 25 composed of a cooling roll 27 and a press roll 28 to apply pressure, and the synthetic resin material is cooled and solidified. In this manner, the separating members 3, 3... Arranged in parallel at desired intervals (2 mm to 20 mm) on the surface of the pressure-sensitive adhesive layer formed by impregnating the pressure-sensitive adhesive into the elastic material 2 are formed. The pressure-sensitive adhesive layer is formed so as to protrude from the surface of the pressure-sensitive adhesive layer formed by impregnating the pressure-sensitive adhesive. Thus, the adhesive sheet A is formed, and the protective release paper 4 is formed on the surface of the adhesive layer formed by impregnating the elastic material 2 of the adhesive sheet with the adhesive, with the separating members 3, 3,. After superimposition, winding work on a roll or the like is completed.

The method for producing the pressure-sensitive adhesive sheet according to the present invention is not limited to the case where the surface of the pressure-sensitive adhesive layer formed by impregnating the pressure-sensitive adhesive into the elastic material 2 is subjected to linear laminating. An elastic material 2 having elasticity and being impregnated with an adhesive is superposed on the sheet body 1, and a linear laminating process is performed on the surface of the elastic material 2 in the same manner as described above. After separating members 3, 3... Arranged in parallel at desired intervals in a state of being raised from the material 2, as shown in FIG. 2 is impregnated with an adhesive 2 2a, and a brush called a doctor coater 30 is used to separate the separating members 3, 3. May be formed on the surface of the weak adhesive layer 31 (FIG. 9).

In this case, the weak pressure-sensitive adhesive layer 31 exhibits extremely low pressure-sensitive adhesiveness because the amount of pressure-sensitive adhesive is small (1 to 1 Og).

Further, the pressure-sensitive adhesive sheet according to the present invention is not limited to the pressure-sensitive adhesive sheet provided with the elastic material made of the above-mentioned nonwoven fabric or the like, but may be a pressure-sensitive adhesive sheet B as shown in FIG. Alternatively, the pressure-sensitive adhesive layer may be provided by directly applying a pressure-sensitive adhesive layer. In this case, a large number of separating members 3 are formed directly on the surface of the pressure-sensitive adhesive layer 32 in a parallel arrangement. As shown in FIG. 11, the production of such an adhesive sheet B is carried out by using a blocking layer forming machine 10 to form a blocking layer forming die 14 on the back surface of the moving sheet body 1. The synthetic resin material for lamination made of the molten polyethylene resin is continuously extruded, and the entire back surface of the sheet body 1 is laminated with the synthetic resin material. Then, the sheet body 1 is passed through the pressing means 15 in a state where the synthetic resin is superimposed, and is pressed under a constant pressure, and the laminated resin is cooled and solidified to form a shielding layer 5 on the back surface of the sheet body 1. To form

When an adhesive is applied in the adhesive applying machine 11, as shown in FIG. 12, when an adhesive coater is used as the applying means 19, a feed roller 21 and an adhesive are used. The distance between the adhesive pan 22 and the adhesive pan 22 should be adjusted so that the surface of the adhesive 22 a in the adhesive pan 22 contacts the surface of the sheet body 1 (blocking layer 5). Thus, an adhesive layer 32 is formed on the back surface of the sheet body i.

Then, in the same manner as in the above-described embodiment shown in FIG. 7, the surface of the pressure-sensitive adhesive layer 32 is subjected to a linear lamination process to form the separating members 3, 3,..., And the pressure-sensitive adhesive sheet B is formed. In the case where the sheet body 33 itself is a film or the like that blocks the adhesive, the step of forming the barrier layer by the barrier layer forming machine 10 can be omitted. As shown in FIG. 13, the pressure-sensitive adhesive sheet C thus formed has a pressure-sensitive adhesive layer 32 directly formed on the back surface of the sheet body 33, and a large number of pressure-sensitive adhesive layers 32 are formed on the surface of the pressure-sensitive adhesive layer 32. Are formed in parallel with each other.

In the above-described embodiment, the step of superimposing the barrier layer 5 and the elastic material 2 on the sheet body 1, the step of applying an adhesive to the elastic material 2, and the separation members 3, 3. Although the example in which the steps are performed continuously by one line has been described, each step may be performed by a separate apparatus. In addition, the synthetic resin is extruded linearly continuously from the surface of the adhesive layer of a general-purpose product sold in a state where the adhesive layer is laminated on the sheet body in advance, and a separating member is desired on the surface of the adhesive layer. You may make it form a parallel arrangement for every space | interval. As described above, according to the present invention, the pressure-sensitive adhesive sheet according to the present invention includes a sheet main body, a pressure-sensitive adhesive layer that is superimposed on the sheet main body, and a state protruding from the surface of the pressure-sensitive adhesive layer. And a large number of separating members arranged in parallel at desired intervals, so that when the sheet is stuck to the adherend, unless the sheet is pressed with a certain pressing force or more, the sheet is Able to remove air bubbles generated during positioning and pasting with temporary bonding without sufficient adhesive strength, and even with amateurs, can easily and beautifully attach sheets to objects such as walls You can stick.

Further, since the sheet main body is provided with a blocking layer for blocking the pressure-sensitive adhesive between the sheet main body and the pressure-sensitive adhesive layer, the pressure-sensitive adhesive does not spread on the surface of the sheet main body.

Further, an elastic material having elasticity and capable of impregnating an adhesive is superimposed on the sheet body, and the elastic material is impregnated with the adhesive to form an adhesive layer. Since the separating member sinks into the elastic material, the shape of the separating member is not exposed on the surface of the sheet body, and it is hardly affected by the unevenness of the adherend or the adhesive, and the finish is beautiful. be able to.

Further, the method for producing a pressure-sensitive adhesive sheet according to the present invention is a method for forming a pressure-sensitive adhesive layer by applying a pressure-sensitive adhesive to a sheet body, and then continuously extruding a molten synthetic resin material from a die in a linear shape, By a linear laminating process that is continuously applied to the surface of the pressure-sensitive adhesive layer of the moving sheet body, a large number of separating members arranged in parallel at desired intervals on the surface of the pressure-sensitive adhesive layer, By forming the sheet so as to be higher than the surface of the pressure-sensitive adhesive layer, when the sheet is stuck to an object to be adhered, the sheet exerts sufficient adhesive force unless pressed with a certain pressing force or more. Instead, it is possible to remove air bubbles generated during positioning and pasting in a state of temporary bonding, and even an amateur can beautifully and easily adhere to an adherend such as a wall.

Further, an elastic material having elasticity and capable of impregnating the pressure-sensitive adhesive is provided on the sheet body in an overlapping manner, and the molten synthetic resin material continuously and linearly extruded from the die is subjected to elasticity of the moving sheet body. By linear laminating processing that is continuously applied to the material surface, After forming a large number of separating members arranged in parallel at desired intervals on the surface of the elastic material so as to be raised from the surface of the elastic material, the elastic material is impregnated with an adhesive, and the separating member is formed. The adhesive adhered to the surface is left thin on the surface and comes off, forming a weak adhesive layer on the surface of the separating member, which is temporarily fixed by the weak adhesive layer on the surface of the separating member. It is possible to easily adjust the position of the makeup sheet in the state in which the makeup sheet is placed.

Claims

The scope of the claims

Ϊ. The sheet body, a viscous agent layer superimposed on the sheet body, and a plurality of viscosities formed parallel to each other at desired intervals, formed so as to be raised from the surface of the viscous inscription layer. Adhesive sheet characterized by comprising a separating member of

2. The pressure-sensitive adhesive sheet according to claim 1, wherein the sheet body has a blocking layer for blocking the pressure-sensitive adhesive between the pressure-sensitive adhesive layer and the gap.

3. The feeder according to claim 1 or 2, wherein the sheet body is formed by laminating an elastic material having elasticity and being impregnable with an adhesive, and forming the adhesive layer by impregnating the adhesive with the adhesive. Adhesive sheet.

4. The pressure-sensitive adhesive sheet according to claim 1, 2 or 3, wherein a weak pressure-sensitive adhesive layer is formed on the surface of the separating member.

5. The adhesive sheet according to claim 1, wherein the sheet body, the blocking layer, the elastic layer, and the separating member are formed of a polyolefin resin.

6. The pressure-sensitive adhesive sheet according to claim 1, 2 or 3, wherein a peeling protective paper which can be peeled off without damaging the adhesiveness of the pressure-sensitive adhesive is laminated and attached to the elastic layer via a separating member.

7. After applying an adhesive to the sheet body to form an adhesive layer, the molten synthetic resin squeezed continuously from the die into a linear shape is applied to the surface of the adhesive layer of the moving sheet body. A large number of separating members arranged in parallel at desired intervals on the surface of the pressure-sensitive adhesive layer by the linear laminating process for continuous application, in a state of being raised from the surface of the pressure-sensitive adhesive layer. A method for producing a pressure-sensitive adhesive sheet, comprising:

8. The test of the pressure-sensitive adhesive sheet according to claim 4, wherein a blocking layer for blocking the pressure-sensitive adhesive is provided on the sheet body.

9. The pressure-sensitive adhesive layer is formed by laminating an elastic material having elasticity and capable of impregnating an adhesive on the sheet body, and impregnating the elastic material with the adhesive.

Manufacturing of the wearable sheet described in 5: Method. 10) An elastic material that has elasticity to the sheet body and can be impregnated with an adhesive is provided on top of the sheet, and the molten synthetic resin material continuously extruded linearly from the die is transferred to the sheet as described above. By the linear laminating process continuously applied to the surface of the elastic material of the main body, a large number of separating members arranged in parallel at desired intervals are raised on the surface of the elastic material from the surface of the elastic material. After being formed in a state of being separated, the elastic material is impregnated with a pressure-sensitive adhesive, and the pressure-sensitive adhesive adhered to the surface of the separating member is thinly removed and left on the surface of the separating member. A method for producing a pressure-sensitive adhesive sheet for forming a layer.