JP2010180271A - Easily pastable self-adhesive sheet and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an easily pastable self-adhesive sheet in which the air easily escapes when pasted to an object, easily pastable to an adherend even when the indentation pitch of the self-adhesive layer is >500 μm, exhibiting good appearance after adhered without blister, and showing no indentation patterns on the surface of the substrate corresponding to those on the surface of the self-adhesive layer. <P>SOLUTION: This self-adhesive sheet includes a substrate sheet, and a self-adhesive layer provided on the substrate sheet, the layer having indentation patterns formed by means of a release sheet having the indentation patterns. (1) A plurality of recessed grooves having openings at the edges of the substrate sheet are provided in a lattice-like pattern or in parallel, wherein the interval of the opposing recessed grooves is >500 μm and ≤2 mm, the width of the opening is 10-200 μm, and the depth is 5-100% of the self-adhesive layer. (2) A shape-transfer coefficient of the substrate sheet defined by the specific formula is ≤5.6. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an easily sticky pressure-sensitive adhesive sheet and a method for producing the same. More specifically, according to the present invention, air can be easily removed when affixed to an adherend, it can be easily affixed, blisters are not generated after application, and the uneven pitch of the pressure-sensitive adhesive layer is more than 500 μm. However, the uneven pattern on the surface of the adhesive layer does not appear on the surface of the substrate, the appearance is good, and the marking film that requires air bleeding performance at the time of application or the adhesive that requires blister resistance after application The present invention relates to an easily sticky pressure-sensitive adhesive sheet suitably used as a label and the like, and a method for efficiently producing the easily sticky pressure-sensitive adhesive sheet.

Conventionally, a pressure-sensitive adhesive sheet is generally composed of a base sheet, a pressure-sensitive adhesive layer formed on the surface thereof, and a release sheet usually provided thereon. In use, the release sheet is peeled off and pasted so that the pressure-sensitive adhesive layer is in contact with the adherend.
However, when the area of the pressure-sensitive adhesive sheet is large to some extent, an air stay tends to remain between the pressure-sensitive adhesive layer and the adherend, and the portion of the air stay becomes a so-called “bulge” and stuck. There was a problem that a swelling occurred on the surface side of the pressure-sensitive adhesive sheet, making it difficult to stick the pressure-sensitive adhesive sheet cleanly. Therefore, once pasted, peel off the pasting method, or when pasting on an adherend such as glass, wet the adherend surface with a surfactant-containing aqueous solution, stick the adhesive sheet and dry, etc. Troublesome measures were taken.
Therefore, in order to solve such a problem, for example, Patent Document 1 discloses a surface sheet, an adhesive layer having a large number of independent small convex portions, and an independent intimate contact with the large number of small convex portions. By forming the release sheet having a large number of small recesses, a pressure-sensitive adhesive sheet has been proposed that can remove air from the gaps between the protrusions to the outside, and can be attached without causing “blowing”. Yes.
Further, in Patent Document 2, the surface of a release film having a large number of recesses is filled with an adhesive in the recesses, and an adhesive layer having a predetermined thickness is continuously formed thereon. A method has been proposed in which a pressure-sensitive adhesive is formed on the surface of the pressure-sensitive adhesive by applying the pressure-sensitive adhesive thicker than the depth of the concave portion and then bonding a substrate to the surface of the pressure-sensitive adhesive layer.
However, as described above, when the surface of the pressure-sensitive adhesive layer is a convex body, the surface of the base material becomes uneven, resulting in a defect that the appearance is deteriorated.

Further, Patent Document 3 is an article with an adhesive for decorative use, comprising a stretchable polymer film having a thickness of 300 μm or less and causing at least 5% inelastic deformation when stretched to 115%, Grooves formed on the pressure sensitive adhesive surface define a volume of at least 1 × 10 ³ μm ³ in any circular region with a diameter of 500 μm and are preferably arranged at a pitch of 400 μm or less, and are initially wet A pressure-sensitive adhesive sheet having a surface roughness that shows a percentage of at least 85%, has no periodicity in the surface appearance of the extensible polymer film after final application, and does not exceed the surface roughness of the extensible polymer itself is disclosed. Yes.
By the way, as a method of providing unevenness on the pressure-sensitive adhesive surface, a metal roll having an uneven structure is pressed against the surface of the release sheet, the unevenness is applied to the surface of the release sheet, the adhesive is applied to the surface, and the substrate sheet is applied. A method of bonding is generally used.
However, when the pitch of the unevenness on the surface of the release sheet is increased, the substrate is deformed following the unevenness on the surface of the release sheet, and the unevenness pattern on the surface of the release sheet is raised on the surface of the substrate. There was a problem of becoming.

Japanese Utility Model Publication No.6-20043 JP-A-11-140391 Special Table 2002-544364

  The present invention has been made under such circumstances, and even when the uneven pitch of the pressure-sensitive adhesive layer is more than 500 μm, air can be easily removed when affixed to an adherend, and can be easily affixed. An object of the present invention is to provide an easy-adhesive pressure-sensitive adhesive sheet having a good appearance without causing blisters to occur later and without causing uneven patterns on the surface of the pressure-sensitive adhesive layer to appear on the surface of the base material.

As a result of intensive studies to develop an easily sticky pressure-sensitive adhesive sheet having the above-mentioned preferable properties, the present inventor used a substrate sheet having a shape transfer coefficient defined by a specific formula below a certain value. And on the pressure-sensitive adhesive layer surface, by forming a specific concave-convex pattern in which a plurality of concave grooves are provided in a lattice shape or in parallel, an easily sticky pressure-sensitive adhesive sheet that can meet the above-mentioned purpose is obtained, and It has been found that this easily sticky pressure-sensitive adhesive sheet can be efficiently produced by a production method having a specific process, and the present invention has been completed based on this finding.
That is, the present invention
[1] A pressure-sensitive adhesive sheet having a base material sheet and a pressure-sensitive adhesive layer provided on the surface of the base material sheet with a concavo-convex pattern formed by a release sheet having a concavo-convex pattern,
(1) As the concave / convex pattern of the pressure-sensitive adhesive layer, a plurality of concave grooves opened at the edge of the base sheet are provided in a lattice shape or in parallel, and the interval between the opposing concave grooves is larger than 500 μm. 2 mm or less, the opening width is 10 to 200 μm, the depth is 5 to 100% of the thickness of the pressure-sensitive adhesive layer, and (2) the shape of the base sheet defined by the following formula (1) The transfer coefficient is 5.6 or less,
Easy-adhesive adhesive sheet, characterized by
Shape transfer coefficient = 1 / (TME × D ³ ) (1)
(However, TME is the tensile elasticity modulus (N / mm < ² >) of a base material sheet, and D is the thickness (mm) of a base material sheet.)
[2] The easy-adhesive pressure-sensitive adhesive sheet according to the above [1], wherein the shape in the lattice in the groove grooves provided in a lattice shape is a square, a rectangle or a parallelogram,
[3] The easy-adhesive pressure-sensitive adhesive sheet according to the above [1] or [2], wherein the interval between opposing concave grooves is 550 μm to 1 mm,
[4] The easy-adhesive pressure-sensitive adhesive sheet according to any one of the above [1] to [3], wherein the opening width of the groove is 20 to 100 μm,
[5] The easy-adhesive pressure-sensitive adhesive sheet according to any one of [1] to [4] above, wherein the substrate sheet has a shape transfer coefficient of 5 or less.
[6] The easily sticky pressure-sensitive adhesive sheet according to any one of [1] to [5] above, wherein the thickness of the pressure-sensitive adhesive layer is 5 to 100 μm, and [7] the above items [1] to [6]. A method for producing an easily sticky pressure-sensitive adhesive sheet according to any one of
(A) a step of forming a plurality of ridges in a predetermined shape on the release treatment layer surface of the release sheet, (b) a step of forming an adhesive layer on the side of the release sheet where the ridges are provided, and ( c) a step of transferring the pressure-sensitive adhesive layer formed in the step (b) to the base material sheet;
A process for producing an easily sticky pressure-sensitive adhesive sheet, characterized by comprising:
Is to provide.

  According to the present invention, air can be easily removed when affixed to an adherend, and can be easily affixed, and blisters do not occur even after affixation, and the uneven pitch of the adhesive layer is over 500 μm. , Marking film that has a good appearance and air bleeding performance is required at the time of application, and adhesive label that requires blister resistance after application, etc. As such, it is possible to provide an easily sticky pressure-sensitive adhesive sheet that is suitably used and a method for efficiently producing the easily sticky pressure-sensitive adhesive sheet.

It is a wave | undulation curve (vertical magnification 2000 times) which shows the pitch of the protruding item | line of the shape transfer surface of a peeling sheet. It is the waviness curve (vertical magnification 5000 times) of the surface of the adhesive sheet of Example 7. FIG. It is a wave | undulation curve (vertical magnification 5000 times) of the surface of the adhesive sheet of the comparative example 1.

  The pressure-sensitive adhesive sheet of the present invention is a pressure-sensitive adhesive sheet having a base material sheet and a pressure-sensitive adhesive layer having a concavo-convex pattern formed by a release sheet having a concavo-convex pattern on the surface of the base material sheet. A specific concavo-convex pattern in which a plurality of concave grooves are provided in a lattice shape or in parallel is formed on the surface of the agent layer, and the shape transfer coefficient defined by the following formula (1) as a base sheet is 5 .6 or less is used.

[Base sheet]
In the pressure-sensitive adhesive sheet of the present invention, as the base sheet, the formula (1)
Shape transfer coefficient = 1 / (TME × D ³ ) (1)
(However, TME is the tensile elasticity modulus (N / mm < ² >) of a base material sheet, and D is the thickness (mm) of a base material sheet.)
It is necessary to use one having a shape transfer coefficient defined by (1) of 5.6 or less. If this shape transfer coefficient is 5.6 or less, a plurality of concave grooves are provided in a lattice shape or in parallel as an uneven pattern on the surface of the pressure-sensitive adhesive layer described later, and the interval (pitch) between the opposing concave grooves is set. Even if it is larger than 500 micrometers, if it is 2 mm or less, it can suppress that this uneven | corrugated pattern protrudes in a base material sheet. In the base material sheet having a shape transfer coefficient exceeding 5.6, the uneven pattern on the surface of the pressure-sensitive adhesive layer is raised on the base material sheet, and the appearance is deteriorated. The preferable shape transfer coefficient is 5 or less, and the lower limit thereof is not particularly limited, but is usually about 0.2 in consideration of the thickness of the base sheet.
In addition, the tensile elasticity modulus TME of the base material sheet in the said Formula (1) is a value measured based on ISO 527-3.

There is no restriction | limiting in particular as a base material sheet used for the adhesive sheet of this invention, Various plastic sheets, synthetic paper, etc. which are conventionally used as base material sheets, such as an adhesive sheet which has an adhesive layer, can be used.
Examples of the plastic sheet include polyolefin resins such as polyethylene, polypropylene and various olefin copolymers, polyester resins such as polyethylene terephthalate and polyethylene naphthalate, polystyrene resins, polyvinyl chloride resins, acrylic resins, urethanes. Examples thereof include a sheet made of a modified acrylic resin, a polycarbonate resin, a polyamide resin, a fluorine resin such as polytetrafluoroethylene, and a mixture or laminate of these resins.
These plastic sheets may be sheets having an ink receiving layer corresponding to each printing method formed on the surface to be printed to give printability, or may be porous sheets. Good.

In addition, these plastic sheets may be subjected to surface treatment such as an oxidation method or a concavo-convex method, if desired, in order to improve adhesion to layers such as a pressure-sensitive adhesive layer, a printing layer and an ink receiving layer provided thereon. Can do. Examples of the oxidation method include corona discharge treatment, plasma treatment, chromic acid treatment (wet), flame treatment, hot air treatment, ozone / ultraviolet irradiation treatment, and examples of the unevenness method include a sand blast method, a solvent, and the like. Treatment methods and the like. These surface treatment methods are appropriately selected according to the type of the film, but in general, the corona discharge treatment method is preferably used from the viewpoints of effects and operability. Moreover, the primer process which provides a primer layer can also be performed.
As the synthetic paper, for example, polypropylene-based foamed synthetic paper can be used.
The thickness of the base sheet is selected so that the shape transfer coefficient is 5.6 or less, preferably 5 or less, but is usually about 20 to 500 μm, preferably 30 to 200 μm.

[Adhesive layer]
(Concave groove)
In the pressure-sensitive adhesive layer, as the uneven pattern, a plurality of concave grooves opened at the edge of the base sheet are provided in a lattice shape or in parallel, and the interval between the opposing concave grooves is greater than 500 μm and 2 mm. Below, it is required that the opening width is 10 to 200 μm and the depth is 5 to 100% of the thickness of the pressure-sensitive adhesive layer.
Even if the interval between the opposing groove grooves is larger than 500 μm, if it is 2 mm or less, the air release property at the time of sticking is good, and the uneven pattern on the surface of the adhesive layer does not float on the surface of the base material sheet, and the appearance Is good. When the interval between the concave grooves is 500 μm or less, the adhesion area becomes small and the adhesive force becomes insufficient. The distance between the opposing concave grooves is preferably in the range of 550 μm to 1 mm.
In the present invention, the cross-sectional shape of each concave groove is not particularly limited, and various shapes such as a V-shaped shape, an inverted trapezoidal shape, and a tapered U-shaped shape are possible. Further, from the viewpoint of easy air removal and the balance of adhesive strength, the opening width of each groove is 10 to 200 μm, preferably 20 to 100 μm, and the depth is 5 of the thickness of the adhesive layer. -100%, preferably 10-80%.
In the present invention, the thickness of the pressure-sensitive adhesive layer is usually 5 to 100 μm, preferably 10 to 60 μm.
In the pressure-sensitive adhesive sheet of the present invention, the plurality of groove grooves that open to the end edge portion may be provided in a lattice shape or may be provided in parallel. When provided in a lattice shape, the shape in the lattice may be a square, a rectangle, or a parallelogram, and each groove is in communication with each other.

(Adhesive)
There is no restriction | limiting in particular as an adhesive used for formation of the said adhesive layer, Arbitrary things can be suitably selected and used from what is conventionally used for the adhesive layer of an adhesive sheet. For example, an acrylic adhesive, a rubber adhesive, a silicone adhesive, a polyurethane adhesive, a polyester adhesive, and the like can be used.

[Method for producing adhesive sheet]
As a method for producing the pressure-sensitive adhesive sheet of the present invention, any method can be used as long as a pressure-sensitive adhesive layer having grooves having the above-mentioned shape can be formed on the surface of the base sheet or in parallel. it can. For example, after a flat pressure-sensitive adhesive layer is directly provided on the surface of the substrate sheet, a method in which the pressure-sensitive adhesive layer is brought into contact with an embossing roll to form a lattice-like or parallel concave groove having a predetermined shape is used. However, according to the following method of the present invention, the target pressure-sensitive adhesive sheet can be efficiently produced.
The production method of the pressure-sensitive adhesive sheet of the present invention includes (a) a step of forming a plurality of ridges in a predetermined shape on the release treatment layer surface of the release sheet, and (b) a side where the ridges of the release sheet are provided. It has the process of forming an adhesive layer, and the process of (c) transferring the adhesive layer formed at the said (b) process to a base material sheet.

(Step (a))
In this step (a), the base material for release sheet is subjected to shape processing by a known method using a metal roll or the like to form a plurality of ridges in a predetermined shape, and a release agent such as silicone resin is applied thereto. And providing a release treatment layer to form a shape transfer surface.
((B) Process)
This step (b) is a step of forming a pressure-sensitive adhesive layer by a conventionally known method on the release treatment layer of the release sheet provided with the shape transfer surface (plural ridges) in the step (a). It is. In this way, a pressure-sensitive adhesive layer with a release sheet is obtained.
(Step (c))
The step (c) is a step of transferring the pressure-sensitive adhesive layer to the base material sheet by bonding the base material sheet to the pressure-sensitive adhesive layer with a release sheet obtained in the step (b). In this manner, the pressure-sensitive adhesive sheet of the present invention having a pressure-sensitive adhesive layer provided with a concavo-convex pattern in which the groove has a predetermined shape can be produced. In use, the release sheet is peeled off, the adhesive layer is brought into contact with the adherend, and affixed while applying pressure with a squeegee or a finger, so that each groove becomes an air flow path, and the air flows. Since it does not come out and air pockets do not occur, it can be easily and cleanly attached with good adhesion. Moreover, the adhesive sheet after sticking does not have a dent or the like on the surface of the base sheet, or the groove structure is raised, so that the appearance is not impaired.

(Peeling sheet)
Examples of the release sheet used in the production method of the present invention include paper substrates such as fine paper, glassine paper, and coated paper, laminated paper obtained by laminating a thermoplastic resin such as polyethylene on these paper substrates, or polyethylene terephthalate. In addition, a release film such as a silicone resin may be applied to a plastic film such as polybutylene terephthalate or polyethylene naphthalate, or a polyolefin film such as polypropylene or polyethylene. Although there is no restriction | limiting in particular about the thickness of this peeling sheet, Usually, it is about 30-180 micrometers.

EXAMPLES Next, although an Example demonstrates this invention further in detail, this invention is not limited at all by these examples.
Various characteristics in each example were measured according to the following methods.
(1) Shape transfer coefficient of substrate sheet It was determined according to the method described in the specification text.
(2) Tensile yield strength and tensile yield elongation A base sheet is cut into a width of 15 mm and a length of 150 mm, attached to a tensile tester with a chuck interval of 100 mm, and pulled at a pulling speed of 200 mm / min, according to ISO 527-3. Tensile yield strength (N / 15 mm) and tensile yield elongation (%) were determined.
(3) Stress relaxation rate and residual tensile strength A base sheet is cut into a width of 15 mm and a length of 150 mm, attached to a tensile tester at a chuck interval of 100 mm, pulled at 5% at a pulling speed of 200 mm / min, and stopped. The tensile strength after 5 minutes and the tensile strength after elapse of 5 minutes were read, and the tensile stress relaxation rate was determined by the following formula.
Tensile stress relaxation rate (%) = [(A−B) / A] × 100
(However, A shows the tensile strength immediately after stopping, and B shows the tensile strength after 5 minutes.)
(4) Tensile elastic modulus The base sheet is cut into a width of 15 mm and a length of 150 mm, attached to a tensile tester with a chuck interval of 100 mm, and pulled at a tensile speed of 200 mm / min, and the tensile elastic modulus is obtained according to ISO 527-3. It was.
(5) Appearance The adhesive used in the examples and comparative examples is applied to release paper having a pitch of ridges of 570 μm, and each substrate sheet is pasted through a laminate roll having a linear pressure of 30 N / cm. Together, a pressure-sensitive adhesive sheet is produced.
Next, the release paper is peeled off from the pressure-sensitive adhesive sheet, attached to a glass plate, and the surface waviness curve of the pressure-sensitive adhesive sheet is measured according to ISO 4287-1997, a surface roughness measuring machine [manufactured by Mitutoyo Corporation, model name “SURF TEST SV -3000 "].
In the undulation curve, the case where the same pitch (570 μm) as the pitch of the protruding strips of the release paper does not appear is indicated as “◯”, the case where it appears as “X”, and the case where the pitch appears but is not recognized by the naked eye. ○ and Δ are acceptable.

Example 1
By laminating polyethylene of 30 μm thickness on high-quality paper of 110 g / cm ² , forming a ridge of a predetermined shape using an embossing roll on the polyethylene side, and further applying a silicone resin with a thickness of 0.1 μm A release sheet having a shape transfer surface was formed. The ridges are tapered U-shaped sections having a height of 20 μm and a width of 60 μm, and form a lattice shape perpendicular to the pitch of 570 μm.
Next, on the release treatment layer of this release sheet, an acrylic pressure-sensitive adhesive [manufactured by Nippon Synthetic Chemical Industry Co., Ltd., “Coponil N-2147” 100 parts by mass, Nippon Polyurethane Industry Co., Ltd., Coronate L ”1 part by mass] After forming an adhesive layer having a thickness of 26 μm, an 80 μm-thick polypropylene synthetic paper [manufactured by YUPO Corporation, trade name “YUPO 80”] is pasted on the adhesive layer as a base sheet. Was made.
The shape of the pressure-sensitive adhesive layer is a regular grid-like groove, and the pitch of the vertical and horizontal grooves is 570 μm, that is, the shape in the grid is a square having a side of 570 μm. The thickness of the pressure-sensitive adhesive layer was 26 μm.
The cross-sectional shape of the groove is a tapered U-shape, the opening width is 60 μm, and the depth is 20 μm.
Various properties of this pressure-sensitive adhesive sheet were determined. The results are shown in Table 1.

Examples 2 to 8 and Comparative Examples 1 and 2
In Example 1, a pressure-sensitive adhesive sheet was prepared in the same manner as in Example 1 except that a substrate sheet of the type shown in Table 1 was used, and various properties were evaluated. The results are shown in Table 1.

Example 9
In Example 1, PET38 is used as a base sheet, and the shape of the pressure-sensitive adhesive layer is provided with a plurality of parallel grooved grooves in which the interval between opposed grooved grooves is 570 μm instead of the regular lattice-shaped grooved grooves. Except for the above, an adhesive sheet was prepared in the same manner as in Example 1, and various properties were evaluated. The results are shown in Table 1.

[note]
Types of base sheet • YUPO 80: “YUPO SGS # 80” manufactured by YUPO CORPORATION, polypropylene synthetic paper • YUPO 60: “YUPO SGS # 60” manufactured by YUPO Corporation, polypropylene synthetic paper • YUPO 110 : "YUPO SGS # 110" manufactured by YUPO CORPORATION, polypropylene synthetic paper-PP50: "Alphan S type" manufactured by Oji Specialty Paper Co., Ltd., polypropylene-OWP-3: "PVC80 OWP- manufactured by Okamoto Co., Ltd." 3 ", Polyvinyl chloride (Calendar film)
・ SK900: “SK900” manufactured by Zeon Kasei Co., Ltd., polyvinyl chloride (cast film)
・ Peach 135: “Peach Coat SPRY-135SMIP3” manufactured by Nisshinbo Co., Ltd., polypropylene synthetic paper ・ PET50: “Lumirror # 50 T60” manufactured by Toray Industries, Inc. ・ PET38: “Lumirror # 38” manufactured by Toray Industries, Inc. T60 ”, polyethylene terephthalate ・ UAZ3000:“ UAZ3000 ”manufactured by Zeon Kasei Co., Ltd., urethane-modified acrylic resin ・ PUAC2000:“ PUAC2000 ”manufactured by ZEON Kasei Co., Ltd., two layers of urethane-modified acrylic resin In Examples 1 to 9, which are the pressure-sensitive adhesive sheets of the invention, the shape transfer coefficient of the base sheet is less than 5.6, and the appearance evaluation is acceptable. In Example 5, since the shape transfer coefficient is larger than the preferable range of 5 or less, the appearance evaluation is acceptable, but Δ.
On the other hand, in Comparative Examples 1 and 2, the shape transfer coefficient exceeds 5.6, and the external appearance evaluation is unacceptable.

  The easy-adhesive pressure-sensitive adhesive sheet of the present invention allows air to escape easily when being applied to an adherend, and can be easily applied, and blisters are not generated after application, and the uneven pitch of the adhesive layer exceeds 500 μm. Even if the surface of the adhesive layer does not have a relief pattern on the surface of the substrate, the appearance is good, and the marking film is required to have air bleeding performance at the time of application, and the blister resistance after application is required. It is suitably used as an adhesive label to be used.

Claims (7)

A pressure-sensitive adhesive sheet having a base material sheet and a pressure-sensitive adhesive layer provided with a concave-convex pattern formed by a release sheet having a concave-convex pattern on the surface of the base sheet,
(1) As the concave / convex pattern of the pressure-sensitive adhesive layer, a plurality of concave grooves opened at the edge of the base sheet are provided in a lattice shape or in parallel, and the interval between the opposing concave grooves is larger than 500 μm. 2 mm or less, the opening width is 10 to 200 μm, the depth is 5 to 100% of the thickness of the pressure-sensitive adhesive layer, and (2) the shape of the base sheet defined by the following formula (1) The transfer coefficient is 5.6 or less,
Easy-adhesive adhesive sheet characterized by
Shape transfer coefficient = 1 / (TME × D ³ ) (1)
(However, TME is the tensile elasticity modulus (N / mm < ² >) of a base material sheet, and D is the thickness (mm) of a base material sheet.)   The easily sticky adhesive sheet of Claim 1 whose shape in the grating | lattice in the groove provided in the grid | lattice form is a square, a rectangle, or a parallelogram.   The easily sticky adhesive sheet of Claim 1 or 2 whose space | interval of the opposing groove groove | channel is 550 micrometers-1 mm.   The easily sticky adhesive sheet in any one of Claims 1-3 whose opening width of a grooved groove is 20-100 micrometers.   The easily sticky adhesive sheet in any one of Claims 1-4 whose shape transfer coefficient of a base material sheet is 5 or less.   The easily sticky adhesive sheet in any one of Claims 1-5 whose thickness of an adhesive layer is 5-100 micrometers. It is a manufacturing method of the easily sticky adhesive sheet in any one of Claims 1-6,
(A) a step of forming a plurality of ridges in a predetermined shape on the release treatment layer surface of the release sheet, (b) a step of forming an adhesive layer on the side of the release sheet where the ridges are provided, and ( c) a step of transferring the pressure-sensitive adhesive layer formed in the step (b) to the base material sheet;
The manufacturing method of the easily sticky adhesive sheet characterized by having.

Images