KR20170027701A - Adhesive sheet and production method for adhesive sheet - Google Patents

Abstract

A pressure-sensitive adhesive sheet comprising at least a substrate, a pressure-sensitive adhesive layer, and a release sheet laminated thereon, wherein the pressure-sensitive adhesive sheet is a pressure-sensitive adhesive sheet which can easily and accurately measure the physical properties of the pressure-sensitive adhesive laminate regardless of the form of the pressure- Sheet and a manufacturing method thereof. A pressure-sensitive adhesive sheet comprising at least a substrate, a pressure-sensitive adhesive layer, and a release sheet laminated thereon, wherein the pressure-sensitive adhesive laminate comprising a substrate and a pressure-sensitive adhesive layer is provided on an exfoliated sheet to be adhered to an adherend, And a part for measuring a physical property to be provided for measurement of the physical properties of the adhesive laminate, and the part for attaching the adherend and the part for measuring the physical property are arranged on the same release sheet in a plane.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a pressure-sensitive adhesive sheet,

The present invention relates to a pressure-sensitive adhesive sheet and a process for producing the pressure-sensitive adhesive sheet.

Particularly, as the pressure-sensitive adhesive sheet (pressure-sensitive adhesive sheet with release sheet) formed by laminating at least the substrate, the pressure-sensitive adhesive layer and the release sheet, regardless of the form of the pressure-sensitive adhesive laminate comprising the substrate and the pressure-sensitive adhesive layer, Sensitive adhesive sheet and a method for producing the same.

Conventionally, a label for display for displaying a predetermined content, a fixing tape for fixing a component in the interior of an electric appliance or the like, or a protective film for protecting components from dust and scratches , A pressure-sensitive adhesive layer formed by laminating a base material and a pressure-sensitive adhesive layer suitable for each application.

Such a sticky laminate has various forms depending on the use thereof, and it may be variously varied, for example, those having a very small size or a cut-out portion (for example, Patent Documents 1 and 2).

That is, Patent Document 1 discloses a printer having a printer housing and a platen roller in a printing portion for printing on a continuous label conveyed on a conveying path formed in the printer housing, And a control section for controlling the detecting section and the printing section so that the interval between the label outlet of the printer housing and the platen roller is set as the minimum label printing area in the conveying direction which is the limit of the minimum dimension as the printable label size, The continuum is a very small label continuum having a base sheet and a plurality of small labels having a pitch in the minimum label printing area while being adhered to the ground, A method of printing a minimal label continuum for printing on a label is disclosed. More specifically, by inserting a slit in the width direction in accordance with the size of each of the minimum labels in the minimum label area within the unit of the minimum label which can be arranged by a predetermined number of sheets within one unit of the minimum label printing area, The label placement area in which the label is formed is partitioned and the print content of the predetermined number of the minimum labels is supplied to the label placement area of each of the minimum labels so that the minimum label printing area and the minimum label printing area And the minimum labeling number is smaller than the number of labeling areas in a unit of day, the minimum labeling area is sequentially printed from the minimum label located at the beginning of the minimum labeling area.

Patent Document 2 discloses a label sheet comprising a label sheet provided with a pressure-sensitive adhesive layer on the back surface of a label base layer and a label identification formed by laminating an IC chip and a linear or coiled antenna line on the surface of the antenna- The information communication sheet is attached in such a manner that the IC chip is superimposed on the pressure sensitive adhesive layer side and is bonded to a portion of the sheet end edge portion of the label sheet in a direction crossing the antenna line of the label identification information communication sheet from the label base layer to the antenna supporting base layer And an inner end portion of the incision improvement is provided so as to extend in an area of the antenna supporting base layer and / or an area of the antenna line in a state in which the antenna line can be energized. .

Japanese Patent No. 4769109 (claims) Japanese Patent Application Laid-Open No. 2005-216054 (claims)

However, the micro label obtained by the printing method of the micro-label continuum described in Patent Document 1 can easily and precisely measure the physical property due to the fact that even if it is necessary to measure the physical properties such as the adhesive force due to the demand for quality control, It became difficult to do so.

Therefore, for example, even if it is confirmed that the physical properties of the product sample stored in the manufactured factory before the punching process were normal, it is possible to obtain a final product of the final product through the history of the transportation process, punching process, It is difficult to judge whether or not the physical properties of the label are normal. Thus, even if the change of physical properties is clear, there has been a problem of quality control that it is difficult to pursue the degree or cause.

Also, in the case of the IC label for preventing rewriting described in Patent Document 2, it is difficult to easily and precisely measure the physical properties due to provision of the section reduction. Therefore, similarly to the case of Patent Document 1, It looked.

Therefore, there has been a demand for a technique for improving the quality controllability of the adhesive laminate of the present invention in which it is difficult to measure the physical properties such as the adhesive force after the molding process, such as a very small thing or a cut portion.

SUMMARY OF THE INVENTION The present inventors have made intensive efforts in view of the above circumstances to provide a pressure-sensitive adhesive laminate comprising a substrate and a pressure-sensitive adhesive layer on an adherend to be adhered to an adherend on a release sheet, And a part for measuring the physical properties to be provided for the measurement of the physical properties of the adhesive laminate and by arranging the part for adherend application and the part for measuring physical property on the same peeling sheet in a plane, The present invention has been completed.

That is, an object of the present invention is to provide a pressure-sensitive adhesive sheet which can easily and accurately measure physical properties of a pressure-sensitive adhesive laminate regardless of the form of a pressure-sensitive adhesive laminate (portion for adherend patch) And a method of manufacturing the same.

According to the present invention, there is provided a pressure-sensitive adhesive sheet comprising at least a substrate, a pressure-sensitive adhesive layer and a release sheet laminated thereon, wherein the pressure-sensitive adhesive laminate comprising a substrate and a pressure-sensitive adhesive layer is provided on an adherend for adhering to an adherend And a part for measuring the physical properties to be provided for the measurement of the physical properties of the adhesive laminate and that the parts for attaching the adherend and the parts for measuring the physical properties are arranged on the same release sheet in a plane A pressure-sensitive adhesive sheet is provided, which can solve the above-described problems.

That is, in the case of the pressure-sensitive adhesive sheet of the present invention, since the pressure-sensitive adhesive laminate is molded and divided into the part to be adhered to the adherend and the part for measuring the physical property, the adhesive part of the adherend is difficult to be measured Even if the sheet is used, the physical properties of the adhesive laminate can be easily and accurately measured by using the portion for measuring the physical properties.

Further, in the pressure-sensitive adhesive sheet of the present invention, since the portion for attaching the adherend and the portion for measuring the physical property are disposed on the same release sheet in a plane, the portion for measuring the physical property has almost the same process history as that for the portion to be adhered to the adherend.

Therefore, by measuring the physical properties using the physical property measuring portion, the physical properties of the portion to be adhered at the time can be easily and accurately measured.

In forming the pressure-sensitive adhesive sheet of the present invention, it is preferable that the planar shape of the portion for measuring physical properties is at least one selected from the group consisting of a rectangle, an approximate rectangle, an ellipse, a substantially ellipse, a circle and a circle.

By such a constitution, it is possible to more easily and precisely measure the physical properties by using the physical property measuring portion.

In forming the pressure-sensitive adhesive sheet of the present invention, it is preferable that the surface area of the portion to be adhered to the adherend has a value of 400 mm 2 or less.

If such a constitution is employed, it is difficult to measure the physical property using the portion for attaching the adherend, because the area is insufficient. However, in the present invention, the physical property can be easily and accurately measured using the property measuring portion.

Further, in constructing the adhesive sheet of the present invention, it is preferable that the portion to be adhered to the adherend has a cut-out portion.

In the case of such a constitution, it is difficult to measure the physical property using the part to be adhered to the adherend because it breaks at the incision at the time of measuring the physical properties. However, in the present invention, the physical property can be easily and accurately measured have.

In forming the pressure-sensitive adhesive sheet of the present invention, it is preferable that the pressure-sensitive adhesive layer of the portion to be adhered to the adherend has a non-adhesive portion that is partially subjected to non-sticking treatment.

Although the physical properties of the non-adhesive portion are affected by the measurement results, it is difficult to measure the physical properties using the portion to be adhered to the adherend, but in the present invention, it is possible to easily and accurately measure the physical properties can do.

In forming the pressure-sensitive adhesive sheet of the present invention, it is preferable that the pressure-sensitive adhesive layer of the portion to be adhered to the adherend has a non-contact portion that does not partially contact the adherend.

In this case, the physical properties of the non-contact portion are affected by the measurement result, so that it is difficult to measure the physical property using the portion to be adhered to the adherend. In the present invention, however, .

Further, another aspect of the present invention is a method for producing a pressure-sensitive adhesive sheet, which comprises the following steps (I) to (II).

(I) a step of preparing a pressure-sensitive adhesive sheet which is formed by laminating at least a substrate, a pressure-sensitive adhesive layer and a release sheet,

(II) base material and a pressure-sensitive adhesive layer are laminated on a release sheet in such a manner that a part for attaching an adherend to be adhered to an adherend and a part for measurement of physical properties to be provided for measurement of physical properties of the pressure- To obtain a pressure-sensitive adhesive sheet in which a part for attaching an adherend and a part for measuring a physical property are arranged in a plane on the same release sheet

That is, in the method for producing a pressure-sensitive adhesive sheet of the present invention, a pressure-sensitive adhesive laminate comprising a substrate and a pressure-sensitive adhesive layer is formed on a release sheet, The part for attaching the adherend and the part for measuring the physical property are disposed on the same release sheet on the same plane so that the adhesive layer can be formed on the surface of the adherend laminate regardless of the shape of the part for adherend application, It is possible to obtain a pressure-sensitive adhesive sheet which can easily and accurately measure the physical properties of the sieve.

Further, in carrying out the method for producing a pressure-sensitive adhesive sheet of the present invention, in the step (II), the first processing means corresponding to the planar shape of the portion to be adhered to the adherend, It is preferable to perform the punching process by using a punching machine having second processing means corresponding to the second processing means.

By doing so, it is possible to make the process history of the part for measuring physical properties infinitely close to the process history of the part to be adhered to the adherend.

1 (a) to 1 (b) are diagrams for explaining a pressure-sensitive adhesive sheet of the present invention.
Figs. 2 (a) to 2 (b) are views for explaining the pressure-sensitive adhesive sheet of the present invention. Fig.
Figs. 3 (a) to 3 (b) are views for explaining the pressure-sensitive adhesive sheet of the present invention. Fig.
4 (a) to 4 (c) are views for explaining the pressure-sensitive adhesive sheet of the present invention.
Fig. 5 is another diagram provided for explaining the adhesive sheet of the present invention. Fig.
6 (a) to 6 (e) are diagrams for explaining a production method of a pressure-sensitive adhesive sheet of the present invention.

[First Embodiment]

1 (a) to 1 (b), a first embodiment of the present invention is a pressure-sensitive adhesive sheet (a pressure-sensitive adhesive sheet) comprising at least a substrate 6, a pressure-sensitive adhesive layer 4, and a release sheet 2 Sensitive adhesive layer 10 composed of a base material 6 and a pressure-sensitive adhesive layer 4 is provided on an exfoliating sheet 2 to have an adherend attaching portion 12 to be adhered to an adherend, And a part 14 for measuring a physical property to be provided for the measurement of the physical properties of the adhesive laminate 10 and the part 12 for attaching the adherend and the part 14 for measuring the physical property are formed in the same peeling Wherein the adhesive sheet (20) is arranged on the sheet (2).

1 (a) is a plan view of the pressure-sensitive adhesive sheet of the present invention, and FIG. 1 (b) is a cross-sectional view of the pressure- Sectional view.

1 (b), portions other than the adherend attachment portion 12 and the physical property measuring portion 14 in the adhesive laminate 10 are shown in a state in which they are removed by peeling off 2 (b), 3 (b), and 4 (b)).

Hereinafter, the first embodiment of the present invention will be described in detail with reference to the drawings appropriately.

1. Peeling sheet

The release sheet in the present invention is not particularly limited and includes, for example, a polyester film such as polyethylene terephthalate, polybutylene terephthalate and polyethylene naphthalate, a polyolefin film such as polypropylene and polyethylene, For example, a silicone or rubber-based releasing agent is applied to the release material of the release layer to provide a release layer.

The thickness of the release sheet is preferably in the range of usually 20 to 150 mu m, more preferably in the range of 25 to 75 mu m.

2. Adhesive laminate

In the present invention, the viscous laminate is a laminate including a substrate and a pressure-sensitive adhesive layer, and means a portion other than the release sheet in the pressure-sensitive adhesive sheet.

Hereinafter, the base material and the pressure-sensitive adhesive layer which are constituent elements of the adhesive laminate will be described.

(1)

The base material in the present invention is not particularly limited and may be appropriately selected from a plastic film, a paper base material, a nonwoven fabric and the like conventionally used as a base material of a pressure sensitive adhesive sheet.

For example, the plastic film may be a polyester film such as polyethylene terephthalate, polybutylene terephthalate and polyethylene naphthalate, a polyethylene film, a polypropylene film, a polyvinyl chloride film, a polyvinylidene chloride film, a polyvinyl alcohol film, A polyimide film, an ethylene-vinyl acetate copolymer film, a polystyrene film, a polycarbonate film, a polymethylpentene film, a polysulfone film, a polyetheretherketone film, a polyethersulfone film, a polyphenylene sulfone film, A fluororesin film, a polyamide film, an acrylic resin film, a norbornene resin film, and a cycloolefin resin film.

The film thickness of the base material is preferably in the range of usually 10 to 300 mu m, more preferably in the range of 20 to 150 mu m.

(2) Pressure-sensitive adhesive layer

The pressure-sensitive adhesive layer in the present invention is not particularly limited, and conventionally known pressure-sensitive adhesives such as acrylic, silicone, urethane, rubber can be used.

As the type of the pressure-sensitive adhesive, an active energy radiation curing type or hot-melt type pressure-sensitive adhesive may be used.

The thickness of the pressure-sensitive adhesive layer is preferably in the range of usually 1 to 200 탆, more preferably in the range of 5 to 50 탆.

(3) Other layers

In addition to the base material and the pressure-sensitive adhesive layer, an intermediate layer and other layers such as the adhesive layer (adhesion-promoting layer) may be laminated on the pressure-sensitive adhesive laminate.

(4) Parts for adherend attachment

The adhesive laminate of the present invention is characterized in that it has a portion for adherend application to be adhered to an adherend.

Although there is no particular limitation on the part for attaching the adherend to the object, in the following description, in measuring the physical properties using the part for attaching the adherend, The description will be made by way of example as the portions are particularly required.

(4) -1 Area

First, as shown in Fig. 1 (a), the area of the shape of the portion 12 to be adhered to the object to be adhered is not more than 400 mm < 2 > The sun, which is a value.

The reason is that if the area of the portion to be adhered to the adherend has a value of 400 mm 2 or less, the area becomes insufficient, and even if the portion to be adhered to the adherend is used as a direct sample, This is because it is difficult to measure the physical properties using the portion to be adhered to the adherend.

The planar shape of the portion to be adhered to the adherend is circular in FIG. 1 (a), but is not particularly limited, and may be any shape such as an ellipse or a rectangle depending on the application.

The "planar shape" in the present invention means a shape when the pressure-sensitive adhesive sheet is viewed from the upper side of the substrate as shown in Fig. 1 (a).

(4) -2 incision section

2 (a) to 2 (b), the portion 12 for adherend attachment is formed in the cut portion 30 as a second mode in which the physical property measurement using the adherend application portion is particularly difficult, . ≪ / RTI >

This is because, when the portion to be adhered to the adherend has a cutout, it breaks at the cutout at the time of measuring the physical properties, so that it becomes difficult to measure the physical property using the portion to be adhered to the adherend.

The portion for the adherend attachment having such a cut-out portion is affixed to the unsealed portion thereof to ensure that the product or case is unopened.

Therefore, the arrangement, the number, the length, the depth, and the like of the incision may be such that the portion for attaching the adherend can be broken enough to break the part to be adhered when the product or the case is opened. As a rough example, As shown in Fig. 2 (b).

As a method of forming the cut portion, for example, in addition to the processing means for forming the portion to be adhered to the adherend, processing means corresponding to the cut portion is provided in advance, so that the portion to be adhered to the adherend is punched Thereby forming an incision.

Alternatively, the incision can be formed by using a previously cut substrate or by separately cutting the substrate with a separate processing means separately from the formation of the portion to be adhered to the substrate.

2 (a) is a plan view of the pressure-sensitive adhesive sheet of the present invention, and Fig. 2 (b) is a plan view of the pressure- Sectional view.

(4) -3 Non-adhesive portion

3 (a) and 3 (b), the pressure-sensitive adhesive layer 4 of the portion 12 for adherend application is formed of the pressure-sensitive adhesive layer 4 as a third mode in which measurement of physical properties using the adherend application portion is particularly difficult, , And a non-adhesive portion (40) in which a non-adhesive treatment is partially performed.

This is because, when the portion to be adhered to the adherend has a non-adhered portion, the physical properties of the non-adhered portion are affected by the measurement result, so that it becomes difficult to measure the physical property using the adherend portion.

Such a portion for an adherend attachment having such a non-adhesive portion can be used for a label such as a POP label for a product requiring high releasability or a protective label for a small appliance in which adhesion of a pressure- Is used.

Therefore, the planar shape, arrangement, number and the like of the non-adhesive portions are not particularly limited, but roughly examples are shown in Figs. 3 (a) to 3 (b).

As a method of the adhesive treatment for forming the nonadhesive portion, for example, when the adhesive is an active energy ray curable adhesive, the active energy ray is irradiated to the adhesive over a predetermined mask, Cured portion to form a non-adhesive portion of a predetermined shape.

3 (a) is a plan view of the pressure sensitive adhesive sheet of the present invention, and FIG. 3 (b) is a cross sectional view of the pressure sensitive adhesive sheet when the pressure sensitive adhesive sheet is cut in a plane passing through the line segment CC in FIG. 3 Sectional view.

(4) -4 Non-contact part

4 (a) to 4 (c), the pressure-sensitive adhesive layer 4 of the part 12 to be adhered to the adherend is formed to be in contact with the pressure- And a non-contact portion 50 that is not in contact with the adherend 100 in part.

This is because, when the portion to be adhered to the adherend has a noncontact portion, the physical properties of the noncontact portion are affected by the measurement result, so that it becomes difficult to measure the physical property using the adherend portion.

The portion to be adhered with the non-contact portion having such a non-contact portion is used when, for example, a protective film is stuck to the lens portion so that the pressure sensitive adhesive layer does not come into direct contact with the lens portion when assembling a precision component such as a lens unit of a digital camera do.

Therefore, the planar shape, the three-dimensional shape, the arrangement and the number of the non-contact portions are not particularly limited, but roughly examples are shown in Figs. 4 (a) to 4 (c).

Further, the non-contact portion can be formed by, for example, punching a portion to be adhered to the adherend, and press-forming the concave portion of the upper mold and the convex portion of the lower mold.

4A is a plan view of the pressure sensitive adhesive sheet of the present invention, and FIG. 4B is a sectional view of the pressure sensitive adhesive sheet when the pressure sensitive adhesive sheet is cut in a plane passing through the line segment DD in FIG. And Fig. 4 (c) is a view showing a state in which the part for adherend attachment in the adhesive sheet shown in Fig. 4 (b) is attached to an adherend.

(4) -5 Planar shape

Further, as shown in Fig. 5, in the fifth mode in which the physical property measurement using the portion to be adhered is particularly difficult, there is no linear portion in the plane shape of the portion 12 for adherend application, .

The reason for this is that if the part for attaching the adherend has such a planar shape, it is difficult to measure the physical property using the part to be adhered to the adherend, for example, in the case of measurement of physical properties in which a predetermined linear distance is required, to be.

Therefore, it is preferable that the length of the linear portion in the plane shape of the portion to be adhered to the object to be adhered is preferably 30 mm or less, more preferably 20 mm or less More preferable.

5 is a plan view of the pressure-sensitive adhesive sheet of the present invention.

The planar shape of the portion to be adhered to the adherend is C-shaped in Fig. 5, but is not particularly limited.

In Fig. 5, although the plane shape of the physical property measuring portion 14 is circular, it has a sufficient area, so that a shape having a sufficient linear distance can be cut out as a sample for physical property measurement.

(5) Parts for measuring properties

The pressure-sensitive adhesive laminate according to the present invention is characterized by having a property-measuring portion to be provided for measurement of physical properties of the pressure-sensitive adhesive laminate.

This is because the physical properties of the adhesive laminate can be easily and accurately measured by using a part for measuring properties even in the case of the adhesive sheet of the present invention in which it is difficult to measure the physical properties after the molding with only the part to be adhered to the adherend.

Hereinafter, the physical property measuring portion will be described in detail.

(5) -1 Target property

The physical properties to be measured using the physical property measuring portion are not particularly limited, and examples thereof include adhesive force and holding force.

The adhesive force can be measured in accordance with, for example, JIS Z 0237: 2009, and the holding force can be measured in accordance with, for example, JIS Z 0237: 2009.

(5) -2 shape

The planar shape of the portion for measuring the physical properties may be a rectangular shape as shown in Fig. 3 (a), a substantially rectangular shape as shown in Fig. 1 (a), Fig. 2 (a) It is preferably at least one member selected from the group consisting of approximately elliptical, circular and substantially circular as shown in Fig.

The reason for this is that by using the shape of the plane shape of the portion for measuring physical properties as such, it is possible to more easily and accurately measure the physical properties by using the portion for measuring physical properties.

In other words, by making the planar shape of the portion for measuring physical properties into such a shape, it becomes possible to easily prepare a measurement specimen necessary for the above-mentioned physical property measurement, so that it is possible to more easily and accurately measure the physical properties have.

(5) -3 size

Further, it is preferable to set the maximum diameter in the plane shape of the physical property measuring portion within a range of 20 to 300 mm.

The reason for this is that when the maximum value is less than 20 mm, it may be difficult to easily prepare a sample for measurement of physical properties. On the other hand, when the maximum value exceeds 300 mm, the area of the portion to be adhered to the adherend which can be placed on the same release sheet may be excessively limited.

When the plane shape of the portion for measuring physical properties is a rectangle, a rectangle, an ellipse, or an ellipse, the length in the major axis direction is preferably within a range of 20 to 300 mm, , More preferably within a range of 45 to 200 mm.

The length (width) in the minor axis direction is preferably within a range of 1 to 30 mm, more preferably within a range of 1.5 to 28 mm, and more preferably within a range of 2 to 25 mm Is more preferable.

The maximum diameter in the present invention means the diameter of the circumscribed circle when a circle circumscribing the plane shape of the part for measuring physical properties is drawn.

(5) -4 placement

In the present invention, as shown in Figs. 1 (a), 2 (a), 3 (a), 4 (a) And the physical property measuring portion 14 are arranged on the same release sheet 2 in a plane.

The reason for this is that by such a constitution, the physical property measuring portion has almost the same process history as that of the portion to be adhered to the adherend, and as a result, the physical property is measured using the physical property measuring portion, This is because the physical properties of the part for use can be easily and accurately measured.

In addition, an aspect of the planar arrangement of the portion to be adhered to the adherend is basically the same as in the case of the conventional pressure sensitive adhesive sheet which does not have a portion for measuring physical properties, as shown in Figs. 1A, As shown in FIGS. 4A, 4A, and 5, it is preferable to arrange them so as to maximize the molding area within a range that does not lower the handling property in use.

On the other hand, an aspect of the plane arrangement of the portion for measuring the physical properties is, for example, as shown in Figs. 1A, 2A, 4A and 5, It is preferable that the adhesive patch application portion is arranged on the outside of the portion on which the adherend application portion is arranged in a plane along any one side.

The reason for this is that it is possible to suppress the inhibition of the planar arrangement of the portion to be adhered to the adherend with such a planar arrangement and to suppress the handling property when using the adherend portion for adherend, to be.

However, as long as the surface arrangement of the part to be adhered is not impeded and the handling property is not impaired, as shown in Fig. 3 (a) As shown in FIG.

[Second Embodiment]

A second embodiment of the present invention is a method for producing a pressure-sensitive adhesive sheet as a first embodiment, which comprises the following steps (I) to (II).

(I) a step of preparing a pressure-sensitive adhesive sheet which is formed by laminating at least a substrate, a pressure-sensitive adhesive layer and a release sheet,

(II) base material and a pressure-sensitive adhesive layer are laminated on a release sheet in such a manner that a part for attaching an adherend to be adhered to an adherend and a part for measurement of physical properties to be provided for measurement of physical properties of the pressure- To obtain a pressure-sensitive adhesive sheet in which a part for attaching an adherend and a part for measuring a physical property are arranged in a plane on the same release sheet

Hereinafter, the second embodiment of the present invention will be described in detail with reference to the drawings mainly on the points different from the first embodiment.

1. Process (I): Preparation of adhesive sheet

The step (I) is a step of preparing a pressure-sensitive adhesive sheet, which is formed by laminating at least a substrate, a pressure-sensitive adhesive layer and a release sheet.

Such a process can be carried out by a conventionally known method.

More specifically, a description will be given by taking as an example the case of using an acrylic-based inactive energy ray-curable pressure-sensitive adhesive composition. The pressure-sensitive adhesive composition is applied to a release sheet and dried to form a pressure-sensitive adhesive layer. .

Further, the pressure-sensitive adhesive sheet before the molding process can be produced as a continuum of objects and, if necessary, can be cut into sheets at predetermined intervals after a subsequent molding process.

2. Process (II): Forming process

6 (a) to 6 (e), the adhesive layered product 10 comprising the base material 6 and the pressure-sensitive adhesive layer 4 is laminated on the release sheet 2 (Not shown) to form an adherend attaching portion 12 and a physical property measuring portion (not shown) in the same manner as in the first embodiment Is a step of obtaining a pressure-sensitive adhesive sheet (20) in which the pressure-sensitive adhesive sheet (20) is disposed in a plane on the release sheet (2).

Such molding can be carried out by a conventionally known method and can be molded by punching or laser machining as shown in Figs. 6 (a) to 6 (b), for example.

6 (a) and 6 (b) are side sectional views showing a punching process.

6 (a) and 6 (b), the first processing means 214 corresponding to the planar shape of the portion 12 to be adhered to the object, It is preferable to perform the punching process by using the punching machine 200 having the second processing means (not shown) corresponding to the plane shape of the punching machine.

The reason is that if the punching process using such a punching machine is used, the process history of the part for measuring the physical property can be infinitely close to the process history of the part to be adhered to the adherend, and the physical property measurement is performed using the part for measuring the physical property , It is possible to more easily and accurately measure the physical properties of the portion to be adhered to the adherend.

6 (a) to 6 (b), the pressure-sensitive adhesive layer 4 of the portion 12 for adherend application as shown in Figs. 4 (a) to 4 (c) The adhesive sheet 20 of the present embodiment having the non-contact portions 50 not in contact with the adherend 100 is manufactured.

Hereinafter, the punching process shown in Figs. 6 (a) to 6 (b) will be described in detail.

6 (a), the pressure-sensitive adhesive sheet 20 'before the forming process is placed in a state in which the upper mold 210 and the lower mold 220 of the punching machine 200 are separated from each other Is fed in the feeding direction E at a constant feeding pitch and is then pushed by the upper mold 210 and the lower mold 220 during the feeding stop period as shown in FIG. 6 (b).

More specifically, as shown in Figs. 6 (c) to 6 (e), the adhesive laminate 10, which is a laminate composed of the substrate 6 and the pressure-sensitive adhesive layer 4, (Not shown) of the upper mold 210 by the first processing means 214 in the upper mold 210 and the incision corresponding to the plane shape of the part 12 to be adhered is formed by the first processing means 214 in the upper mold 210, An incision corresponding to the planar shape of the portion 14 for measuring the physical property is formed.

6 (c) is a plan view of the pressure-sensitive adhesive sheet obtained by the punching step shown in Figs. 6 (a) and 6 (b), and Fig. 6 (d) Fig. 6 (e) is a sectional view when the pressure-sensitive adhesive sheet is cut in a plane passing through the line segment YY in Fig. 6 (c) to be.

At the same time, the recessed portion 212 of the upper mold 210 and the protruded portion 222 of the lower mold 220 form the adherend attaching portion 12 of the pressure-sensitive adhesive sheet 20 ' The non-contact portion 50 is formed in the portion 12 for adherend attachment.

Thereafter, when the upper mold 210 and the lower mold 220 are separated from each other, the continuity of the adhesive sheet 20 and the adhesive sheet 20 'before processing is fed in the feeding direction E by a constant feeding pitch, The above process is repeated.

The final adhesive sheet 20 shown in Figs. 6 (c) to 6 (e) can be obtained by cutting the continuous sheet of the adhesive sheet 20 obtained by repeating the above steps into sheets.

In the final adhesive sheet 20 shown in Figs. 6 (c) to 6 (e), other than the adherend attachment portion 12 and the physical property measuring portion 14 in the adhesive laminate 10, The part is stripped off.

This is because when the pressure-sensitive adhesive sheet is used, the part for attaching the adherend or the part for measuring the physical property can be easily peeled off.

The peeling removal process may be performed at any point from the punching process to the cutting or winding process, and the process may be omitted in some cases.

6 (a) to 6 (b) have been specifically described. However, the punching process for forming the part for attaching the adherend and the part for measuring the physical property, the uneven processing for forming the non- And the order of cutting processing to cut into sheets is not particularly limited.

Therefore, for example, after the pressure-sensitive adhesive sheet before the forming process is cut into sheets, the non-contact portions may be formed by the irregularity process, and the punching process may be performed at the end.

Alternatively, the pressure-sensitive adhesive sheet before the forming process may be punched, cut into sheets, and finally, a non-contact portion may be formed by irregularity processing.

Alternatively, after the pressure-sensitive adhesive sheet before the forming process is punched, the non-contact portion may be formed by the irregularity process, and the sheet may be cut into sheets.

As described above, according to the pressure-sensitive adhesive sheet of the present invention, the pressure-sensitive adhesive laminate comprising the substrate and the pressure-sensitive adhesive layer is provided on the release sheet in such a manner that a portion for adherend application to be adhered to the adherend, The part to be adhered to the adherend and the part for measuring the physical property are arranged on the same peeling sheet so as to be provided for the physical property measurement to be provided for the measurement of the physical properties of the adherend laminate It is possible to easily and accurately measure the physical properties of the adhesive laminate.

Therefore, the pressure-sensitive adhesive sheet of the present invention is a pressure-sensitive adhesive sheet of the present invention, which is difficult to measure physical properties such as adhesion force after molding processing, such as a microprotective film or a label having a cutout portion, It is expected.

The present invention relates to a pressure-sensitive adhesive sheet, and more particularly, to a pressure-sensitive adhesive sheet, which comprises a pressure-sensitive adhesive sheet, A cut part, 40: a non-adhesive part, 50: a noncontact part, 100: an adherend, 200: a punching machine, 210: an upper mold, 212: a recess, 214: a first processing means, 220: part

Claims (8)

A pressure-sensitive adhesive sheet comprising at least a substrate, a pressure-sensitive adhesive layer, and a release sheet laminated thereon,
Wherein the adhesive laminate comprising the base material and the pressure-sensitive adhesive layer comprises a part for adherend application to be adhered to an adherend on the release sheet and a material for adherend to be adhered to the adherend, And is formed into a measuring part,
Wherein the part for attaching the adherend and the part for measuring the physical property are disposed in the same plane on the same release sheet. The method according to claim 1,
Wherein the planar shape of the portion for measuring the physical property is at least one selected from the group consisting of a rectangle, a substantially rectangular, an ellipse, a substantially ellipse, a circle, and a substantially circular shape. 3. The method according to claim 1 or 2,
Wherein an area of the adherend application portion in a plane shape is set to a value of 400 mm 2 or less. 4. The method according to any one of claims 1 to 3,
Wherein the portion for attaching the adherend has a cut-out portion. 5. The method according to any one of claims 1 to 4,
Wherein the pressure-sensitive adhesive layer of the portion to be adhered to the adherend has a non-adhered portion in which a non-adhered portion is partially applied. 6. The method according to any one of claims 1 to 5,
Wherein the pressure-sensitive adhesive layer of the portion to be adhered to the adherend has a non-contact portion that is not in contact with the adherend partly. A method for producing a pressure-sensitive adhesive sheet according to any one of claims 1 to 6,
A process for producing a pressure-sensitive adhesive sheet, which comprises the following steps (I) to (II).
(I) a step of preparing a pressure-sensitive adhesive sheet which is formed by laminating at least a substrate, a pressure-sensitive adhesive layer and a release sheet,
(II) A pressure-sensitive adhesive laminate comprising the base material and the pressure-sensitive adhesive layer, wherein the pressure-sensitive adhesive layer comprises a part to be adhered to an adherend on the release sheet and a part to be adhered to the adherend, A step of forming a pressure-sensitive adhesive sheet in which a part for measuring a physical property is formed and the part for attaching the adherend and the part for measuring a physical property are arranged in the same plane on the same release sheet 8. The method of claim 7,
The method according to any one of claims 1 to 3, wherein, in the step (II), the forming processing includes a first processing means corresponding to a planar shape of the portion to be adhered to the adherend and a second processing means corresponding to a planar shape of the material property measuring portion Is subjected to a punching process.

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