JP6931318B2 - Adhesive sheet with release liner and release liner - Google Patents

Description

The present invention relates to an adhesive sheet with a release liner and a release liner that can be used therefor.

An adhesive sheet with a release liner, in which a release liner is laminated on a base sheet via an adhesive layer, is used for decoration, display, and the like. Such a decorative or display adhesive sheet has become widespread in place of the conventional decorative or display method by painting because it is only necessary to peel off the release liner and attach the adhesive layer to the adherend at the time of construction. There is.

When the adhesive sheet has a large area, air pools are likely to occur between the adhesive layer and the adherend during construction, which may spoil the aesthetic appearance of the adhesive sheet. There is also known a technique for allowing air to communicate between the adhesive layer and the adherend by providing an uneven portion on the surface of the release liner (Patent Documents 1 and 2).

Japanese Unexamined Patent Publication No. 07-224254 Japanese Unexamined Patent Publication No. 07-278508

These adhesive sheets with a release liner are expected to have high adhesive strength because the surface of the adhesive layer is provided with irregularities that allow air to pass through, but once attached to the adherend, the position is adjusted and rearranged thereafter. There is a problem that it becomes difficult to reposition.

Therefore, an object of the present invention is to provide an adhesive sheet with a release liner, which is excellent in air bleeding property during construction and excellent in repositioning suitability, and a release liner that can be used therefor.

In order to solve the above problems, the present inventors have conducted diligent studies and found that the release liner is an adhesive sheet with a release liner in which a release liner, an adhesive layer and a base sheet are laminated in this order. The purpose is achieved by having a plurality of striped convex portions of a predetermined size parallel to each other on the peeling-processed surface and providing uneven portions of a predetermined size between the striped convex portions. I found out that

That is, the present invention provides the following pressure-sensitive adhesive sheet with a release liner and a release liner that can be used therefor.
[1] An adhesive sheet with a release liner in which a release liner, an adhesive layer, and a base material sheet are laminated in this order.
The peeling liner has a plurality of striped protrusions parallel to each other on the peeling treatment surface in contact with the pressure-sensitive adhesive layer.
The width of the striped convex portion is 10 to 150 μm, and the height of the striped convex portion is 5 to 40 μm.
The distance between the center lines of the striped protrusions is 200 to 1000 μm.
Between the adjacent said stripe-shaped convex portion, the concave-convex portion is provided, the maximum height roughness Rz of the uneven portion is larger than 3 [mu] m, and, rather smaller than the height of the stripe-shaped protrusion,
An adhesive sheet with a release liner in which the heights of the uneven portions are not uniform.

[ 2 ] The peeling surface has a plurality of striped protrusions parallel to each other.
The width of the striped convex portion is 10 to 150 μm, and the height of the striped convex portion is 5 to 40 μm.
The distance between the center lines of the striped protrusions is 200 to 1000 μm.
Between the adjacent said stripe-shaped convex portion, the concave-convex portion is provided, the maximum height roughness Rz of the uneven portion is larger than 3 [mu] m, and, rather smaller than the height of the stripe-shaped protrusion,
A peeling liner in which the heights of the uneven portions are not uniform.

According to the pressure-sensitive adhesive sheet with a release liner of the present invention, there is provided a pressure-sensitive adhesive sheet having excellent air bleeding property during construction and excellent repositioning suitability, and a release liner that can be used therefor.

It is sectional drawing which shows one Embodiment of the pressure-sensitive adhesive sheet with a release liner of this invention. It is a perspective schematic view which shows the release liner among the pressure-sensitive adhesive sheet with a release liner of one Embodiment of this invention. It is sectional drawing which shows an example of the use method of an adhesive sheet.

<< Adhesive sheet with release liner >>
The pressure-sensitive adhesive sheet with a release liner of the present invention will be described with reference to the drawings. In addition, in the figure used in the following description, in order to make it easy to understand the features of the present invention, the main part may be enlarged for convenience, and the dimensional ratio and the like of each component are the same as the actual ones. Is not always the case.

FIG. 1 is a cross-sectional view schematically showing an embodiment of the pressure-sensitive adhesive sheet with a release liner of the present invention. FIG. 2 is a schematic perspective view showing a release liner among the adhesive sheets with a release liner.
The adhesive sheet 1 with a release liner shown here is formed by laminating the release liner 10, the adhesive layer 20, and the base sheet 30 in this order, and the release liner 10 is parallel to the release treatment surface in contact with the adhesive layer 20. The striped convex portions 11 have a plurality of striped convex portions 11, the width 12 of the striped convex portions 11 is 10 to 150 μm, the height 13 of the striped convex portions 11 is 5 to 40 μm, and the striped convex portions 11 are of each other. The center line spacing 14 is 200 to 1000 μm, the uneven portion 15 is provided between the striped convex portions 11, the maximum height roughness Rz of the uneven portion 15 is larger than 3 μm, and the striped convex portion is formed. It is smaller than the height 13 of 11.

FIG. 3 is a schematic cross-sectional view showing an example of how to use the adhesive sheet. When the adhesive sheet 1 with a release liner is used, the release liner 10 is peeled off, and the side of the adhesive layer 20 of the remaining adhesive sheet 40 is brought into contact with the adherend 50. The peeling liner 10 has a plurality of striped convex portions 11 parallel to each other on the peeling treatment surface in contact with the pressure-sensitive adhesive layer 20, so that the surface of the pressure-sensitive adhesive layer 20 bonded to the surface of the peeling liner 10 , A plurality of striped recesses 22 parallel to each other are formed, and since there are the striped recesses 22, air can be easily evacuated by applying pressure with a squeegee or a finger during construction. Since no air pool is generated, it can be easily and neatly attached with good adhesion. Further, since the release liner 10 is provided with the uneven portion 15 between the striped convex portions 11, the transfer surface 24 having the unevenness of the pressure-sensitive adhesive layer 20 corresponding to the uneven portion 15 is provided at the time of construction. It becomes the initial contact surface with the adherend, and can be excellent in repositioning suitability. The appearance of the adhesive sheet 40 after being attached is not impaired due to dents or the like on the surface of the base sheet 30 or the uneven structure being raised.

Hereinafter, each layer constituting the pressure-sensitive adhesive sheet with a release liner of the present invention will be described.

<Peeling liner>
The peeling liner has a plurality of striped protrusions parallel to each other on the peeling surface.
The width of the striped convex portion is 10 to 150 μm, preferably 20 to 130 μm, and more preferably 40 to 110 μm.

The height of the striped convex portion is 5 to 40 μm, preferably 10 to 30 μm, and more preferably 15 to 35 μm.

The distance between the center lines of the striped protrusions is 200 to 1000 μm, preferably 300 to 900 μm, and more preferably 400 to 800 μm.

Since the release liner has a plurality of striped protrusions having the above sizes parallel to each other, the surface of the pressure-sensitive adhesive layer provided on the surface of the release liner has a plurality of such sizes. The striped recesses are formed, and air can be easily evacuated during construction. It is preferable that the plurality of striped convex portions are continuously formed up to the edge portion of the base material sheet. The shape of the plurality of striped convex portions of the release liner may be any shape as long as a plurality of striped concave portions are formed on the surface of the pressure-sensitive adhesive layer and air can be easily evacuated during construction, regardless of the cross-sectional shape. The cross section of the plurality of striped protrusions of the release liner may be substantially square, approximately rectangular, approximately triangular, approximately semicircular, or substantially semi-elliptical. It may be.

Further, it is preferable that the plurality of striped convex portions of the release liner are parallel and regularly spaced at equal intervals. By making the plurality of striped protrusions parallel and regularly evenly spaced, the plurality of striped recesses on the surface of the adhesive layer can be made inconspicuous even when the base sheet is transparent or translucent. Can be done.

The plurality of striped convex portions 11 of the release liner 10 may have ones parallel to each other, for example, only ones parallel to each other as shown in FIG. 2, and ones parallel to each other. And may be in a grid pattern having those intersecting each other at right angles, may be parallelograms or rhombuses having those intersecting each other at a predetermined angle, and those parallel to each other and predetermined to each other. It may be a rhombus having something that intersects at an angle.

The release liner is provided with uneven portions between the striped convex portions.
The maximum height roughness Rz of the uneven portion is larger than 3 μm, preferably larger than 5 μm, and more preferably larger than 7 μm. Further, the maximum height roughness Rz of the uneven portion is smaller than the height of the striped convex portion, preferably smaller than 80% of the height of the striped convex portion, and is the height of the striped convex portion. More preferably, it is less than 70%.

The peeling liner has the striped convex portion, and the uneven portion is provided between the striped convex portions. By forming the uneven portion having the above size, the adhesive is applied when the adhesive sheet is applied. Since the layer is point-bonded to the adherend, it is possible to have excellent air bleeding property and excellent repositioning suitability.

It is preferable that the height of the uneven portion of the release liner is not uniform. Since the heights of the uneven portions are not uniform, the suitability for repositioning can be further improved.

As the release liner, at least one surface of the release liner base material is peeled off. The base material for the release liner is not particularly limited, and is, for example, a laminated paper obtained by laminating a thermoplastic resin such as polyethylene on a paper base material such as high-quality paper, glassin paper, or coated paper, or polyethylene terephthalate, polybutylene terephthalate, or polyethylene. Examples thereof include polyester films such as naphthalate and plastic films such as polyolefin films such as polypropylene and polyethylene. Further, it may be a laminated film in which these films are laminated.

As the release agent used for the release treatment, alkyd-based, silicone-based, fluorine-based, unsaturated polyester-based, polyolefin-based, wax-based, rubber-based, etc. are used, and in particular, alkyd-based, silicone-based, and fluorine-based release agents. Is preferable because it has heat resistance.

In order to peel off the surface of a film or the like that is a base material for a release liner using the above release agent, the release agent is used as it is without a solvent, or after being diluted or emulsified with a solvent, a gravure coater, a bar coater, or an air knife coater. , The release liner coated with the release agent by applying with a roll coater or the like may be provided at room temperature or under heating, or may be cured by an electron beam to form a release agent layer. The thickness of the release agent layer is not particularly limited, but is about 0.05 to 5 μm.

The thickness of the release liner is not particularly limited, but is usually about 10 to 250 μm, preferably about 20 to 200 μm.

(Manufacturing method of release liner)
As a method for producing a release liner, a release liner base material is formed into a predetermined shape by a conventionally known method using an embossed roll or the like, and a release agent such as silicone is further applied to provide a release treatment surface.
For example, after the entire surface of the metal roll is sandblasted, a plurality of striped recesses parallel to each other are etched, and the metal roll thus obtained is pressed against the release liner base material to form a predetermined shape on the release liner base material. By forming a striped convex portion 11 and further applying a release agent, a plurality of striped convex portions 11 parallel to each other corresponding to the striped concave portions of the metal roll, and sandblasting of the metal roll between the striped convex portions 11 A peeling liner 10 provided with uneven portions 15 having irregular heights corresponding to the treated surface can be produced.
Further, after the entire surface of the metal roll is etched into a conical shape having a certain depth, a plurality of striped recesses parallel to each other are etched, and the metal roll thus obtained is pressed against the base material for the release liner to form a release liner. By forming a predetermined shape on the base material for use and further applying a release agent, a plurality of striped convex portions 11 parallel to each other corresponding to the striped concave portions of the metal roll, and the striped convex portions 11 are connected to each other. A release liner 10 can be produced in which uneven portions 15 having regularly aligned heights corresponding to the conical etching surface of the metal roll are provided between them.

<Base sheet>
The base material sheet used for the pressure-sensitive adhesive sheet of the present invention is not particularly limited, and various plastic sheets, papers, and the like conventionally used as a base material sheet such as a pressure-sensitive adhesive sheet having an adhesive layer can be used. A decorative layer such as printing, printing, vapor deposition, or sputtering, or a functional layer such as a hard coat, a stain prevention coat, or a gloss adjustment coat may be formed on the surface of the material.

Examples of this plastic sheet include polyolefin resins such as polyethylene, polypropylene and various olefin copolymers, polyester resins such as polyethylene terephthalate, polyethylene naphthalate and polybutylene terephthalate, polystyrene resins, polyvinyl chloride resins and acrylics. Based resin, polycarbonate resin, polyamide resin, polyurethane resin, fluororesin such as polytetrafluoroethylene, polybutene, polybutadiene, polymethylpentene, ethylene vinyl acetate copolymer, ethylene (meth) acrylic acid copolymer, Examples of sheets consisting of ethylene (meth) acrylic acid ester copolymers, ABS resins, ionomer resins; thermoplastic elastomers containing components such as polyolefins, polyurethanes, polystyrenes, polyvinyl chlorides, and polyesters, and mixtures or laminates of these resins. be able to.

Further, these plastic sheets may be subjected to a corona treatment or a primer treatment, if desired, in order to improve the adhesion to a layer such as an adhesive layer, a printing layer or an ink receiving layer provided on the plastic sheet.
As the papers, high-quality paper, art paper, coated paper, kraft paper and the like are used. When paper is used as the base sheet, the basis weight is usually selected in the range of ^{40 to 120 g / m 2.}

The thickness of the base sheet is not particularly limited, but is usually selected in the range of 20 to 500 μm, preferably 30 to 300 μm.
Here, the "thickness of the base sheet" means the thickness of the entire base sheet, and for example, the thickness of the base sheet composed of a plurality of layers is the total of all the layers constituting the base sheet. Means the thickness of. Examples of the method for measuring the thickness of the base sheet include a method in which the thickness is measured at any five locations using a contact thickness gauge and the average of the measured values is calculated.

<Adhesive layer>
As the pressure-sensitive adhesive layer, a known one can be appropriately used.
The pressure-sensitive adhesive layer can be formed by using a pressure-sensitive adhesive composition containing various components for constituting the pressure-sensitive adhesive layer. The ratio of the contents of the components that do not vaporize at room temperature in the pressure-sensitive adhesive composition is usually the same as the ratio of the contents of the components in the pressure-sensitive adhesive layer. In addition, in this specification, "room temperature" means a temperature which is not particularly cooled or heated, that is, a normal temperature, and examples thereof include a temperature of 15 to 30 ° C.

The pressure-sensitive adhesive composition used for forming the pressure-sensitive adhesive layer is not particularly limited, and any one can be appropriately selected and used from those conventionally used for the pressure-sensitive adhesive layer of the pressure-sensitive adhesive sheet. For example, an acrylic pressure-sensitive adhesive, a rubber-based pressure-sensitive adhesive, a silicone-based pressure-sensitive adhesive, a polyurethane-based pressure-sensitive adhesive, a polyester-based pressure-sensitive adhesive, and the like can be used. Further, it may be an emulsion type, a solvent type or a solvent-free type, and may be a crosslinked type or a non-crosslinked type.
Examples of the acrylic pressure-sensitive adhesive include those obtained by cross-linking a copolymer composed of a monomer that imparts adhesiveness, a monomer that imparts cohesive force, and a monomer containing a cross-linking functional group with a cross-linking agent. ..
Examples of the monomer that imparts adhesiveness include (meth) acrylic acid alkyl esters such as butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, and octyl (meth) acrylate.
Examples of the monomer that imparts cohesive force include methyl (meth) acrylate, vinyl acetate, styrene, acrylonitrile, and the like.
Examples of the functional group-containing monomer include (meth) acrylic acid, maleic acid, itaconic acid, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, and 4-hydroxybutyl (meth) acrylate. Examples thereof include N-methylol (meth) acrylamide.
Examples of the cross-linking agent include an isocyanate-based cross-linking agent, an epoxy-based cross-linking agent, and a metal chelate-based cross-linking agent.

In addition to the above-mentioned components, the pressure-sensitive adhesive composition may further contain various additives such as colorants (pigments, dyes), deterioration inhibitors, antistatic agents, flame retardants, and ultraviolet rays.

The thickness of the pressure-sensitive adhesive layer can be appropriately selected depending on the intended purpose, but is preferably 5 to 100 μm, more preferably 5 to 80 μm, and particularly preferably 5 to 60 μm. Here, the "thickness of the pressure-sensitive adhesive layer" means the thickness of the entire pressure-sensitive adhesive layer, and for example, the thickness of the pressure-sensitive adhesive layer composed of a plurality of layers is the sum of all the layers constituting the pressure-sensitive adhesive layer. Means the thickness of. Examples of the method for measuring the thickness of the pressure-sensitive adhesive layer include a method in which the thickness is measured at any five locations using a contact thickness gauge and the average of the measured values is calculated.

The pressure-sensitive adhesive composition can be obtained by blending each component for forming a pressure-sensitive adhesive layer, such as an acrylic copolymer.

<< Manufacturing method of adhesive sheet with release liner >>
The pressure-sensitive adhesive sheet with a release liner can be manufactured by sequentially laminating the above-mentioned layers so as to have a corresponding positional relationship. The method of forming each layer is as described above.

For example, by applying the above-mentioned pressure-sensitive adhesive composition on the peel-processed surface of the release liner and drying it if necessary, the pressure-sensitive adhesive layer is laminated on the peel-processed surface of the release liner and peeled off from the base sheet. The pressure-sensitive adhesive layer formed on the peel-processed surface of the liner can be bonded to obtain a pressure-sensitive adhesive sheet with a peel-off liner. The surface of the pressure-sensitive adhesive layer of the pressure-sensitive adhesive sheet with a release liner on the release liner side has a surface shape in which the shape of the release-treated surface of the release liner is transferred in the reverse shape.

Further, by applying the above-mentioned pressure-sensitive adhesive composition on the base material sheet and drying it as necessary, the pressure-sensitive adhesive layer is laminated on the base material sheet, and the peeling-treated surface of the release liner and the base material sheet are covered. It is also possible to bond the pressure-sensitive adhesive layer formed on the surface to a pressure-sensitive adhesive sheet with a release liner. Also at this time, the surface of the pressure-sensitive adhesive layer of the pressure-sensitive adhesive sheet with the release liner on the release liner side has a surface shape in which the shape of the release-treated surface of the release liner is transferred to the reverse shape.

The pressure-sensitive adhesive composition may be applied to the peel-treated surface of the peel-off liner or the surface of the base sheet by a known method, for example, an air knife coater, a blade coater, a bar coater, a gravure coater, a roll coater, a roll. Examples thereof include a method using various coaters such as a knife coater, a curtain coater, a die coater, a knife coater, a screen coater, and a kiss coater.

If necessary, the coated pressure-sensitive adhesive composition may be crosslinked by heating. The heating conditions can be, for example, 80 to 130 ° C. for 1 to 5 minutes, but are not limited thereto.

Hereinafter, the present invention will be described in more detail with reference to examples of the pressure-sensitive adhesive sheet with a release liner. However, the present invention is not limited to the examples shown below.

[Measurement method of maximum height roughness Rz of uneven portion]
In accordance with JIS B0601: 2013, the surface roughness of the uneven portion between the striped convex portions was measured using "SURFTEST SV-3000" manufactured by Mitutoyo Co., Ltd., and the maximum height roughness Rz of the uneven portion was determined. I asked.

[Air bleeding property (air pool disappearance) test]
The sample was cut to 50 mm × 50 mm, an adhesive sheet from which the release liner was peeled off was attached to a melamine-coated plate so as to form a circular air pool with a diameter of 15 mm, and the adhesive sheet was crimped with a squeegee and evaluated according to the following criteria. ..
◯: The air pool disappeared.
X: The air pool did not disappear.

[Repositioning aptitude test]
An adhesive sheet with a release liner was cut into a width of 50 mm and a length of 100 mm to prepare a test piece. As a base material to which the adhesive sheet is attached, a flat melamine-coated plate whose surface was wiped with ethanol was prepared. Subsequently, the release liner was peeled off from the pressure-sensitive adhesive sheet with the release liner, and the test piece was placed so that the pressure-sensitive adhesive layer was in contact with the melamine-coated plate. After 10 seconds, the pressure-sensitive adhesive sheet was moved (sliding) along the base material in a state where the pressure-sensitive adhesive layer of the pressure-sensitive adhesive sheet and the melamine-coated plate were in contact with each other.
◯: The adhesive sheet could be smoothly moved in the direction along the base material.
Δ: The adhesive sheet could be moved in the direction along the base material, although it was caught.
X: The adhesive sheet could not be moved in the direction along the base material.

[Example 1]
(Manufacturing of base sheet)
The composition for a base sheet obtained by melting the following base resin was formed into a film having a thickness of 80 μm using a calendar to obtain a base sheet.

Base resin:
Polyvinyl chloride (PVC): 100 parts by mass, dioctyl phthalate: 20 parts by mass, epoxy plasticizer: 5 parts by mass, barium zinc-based stabilizer: 2 parts by mass, titanium oxide (pigment): 10 parts by mass

(Manufacturing of adhesive composition)
92 parts by mass of butyl acrylate and 8 parts by mass of acrylic acid as a monomer component, 200 parts by mass of ethyl acetate as a solvent, and 0.2 parts by mass of azobisisobutyronitrile as a polymerization initiator were added to the reactor. Mixed. After degassing with nitrogen gas for 4 hours and gradually raising the temperature to 60 ° C., the polymerization reaction was carried out with stirring for 24 hours, and an ethyl acetate solution containing an acrylic copolymer having a weight average molecular weight of 650,000 (dry mass). A concentration of 33% by mass) was obtained. A pressure-sensitive adhesive composition was obtained by adding 1 part by mass of an isocyanate-based cross-linking agent to 100 parts by mass of an ethyl acetate solution.

(Manufacturing of release liner)
After sandblasting the entire surface of the metal roll, a plurality of striped recesses parallel to each other are etched, and the metal roll thus obtained is pressed against the polyethylene surface of the release liner base material obtained by laminating polyethylene on the paper base material. By forming a surface having a predetermined shape shown in FIG. 2 on the base material for a release liner and further applying a release agent made of polyethylene to a thickness of 0.1 μm, the metal rolls are parallel to each other corresponding to the striped recesses of the metal roll. The peeling liner of Example 1 is provided with the plurality of striped convex portions 11 and the uneven portions 15 having irregular heights corresponding to the sandblasted surface of the metal roll between the striped convex portions 11. Was produced.
The width of the striped convex portions of the obtained release liner is 80 μm, the height of the striped convex portions is 20 μm, the centerline spacing between the striped convex portions is 600 μm, and the stripe-shaped convex portions are of each other. The maximum height roughness Rz of the uneven portion of the uneven height between them was 10.2 μm.

(Manufacturing of adhesive sheet with release liner)
The pressure-sensitive adhesive composition was applied to the release liner of Example 1 so that the thickness of the pressure-sensitive adhesive layer after drying was 30 μm, dried at 90 ° C. for 1 minute, and then transferred to the base sheet. A pressure-sensitive adhesive layer was formed to prepare a pressure-sensitive adhesive sheet with a release liner according to Example 1. Table 1 shows the performance evaluation results of this adhesive sheet.

[Example 2] (Reference example)
(Manufacturing of release liner)
After the entire surface of the metal roll is etched into a conical shape with a certain depth, a plurality of striped recesses parallel to each other are etched, and the metal roll thus obtained is used as a base material for a release liner in which polyethylene is laminated on a paper base material. By pressing against the polyethylene surface, a surface of a predetermined shape is formed on the base material for the release liner, and by applying a release agent made of silicone to a thickness of 0.1 μm, it corresponds to the striped recesses of the metal roll. A plurality of striped convex portions 11 parallel to each other and conical concave and convex portions 15 having a constant height corresponding to the etching-treated surface of the metal roll are provided between the striped convex portions 11. The release liner of Example 2 was prepared.
The width of the striped convex portions of the obtained release liner is 80 μm, the height of the striped convex portions is 20 μm, the centerline spacing between the striped convex portions is 600 μm, and the stripe-shaped convex portions are of each other. The maximum height roughness Rz of the conical uneven portion having a constant height between them was 10.0 μm.

(Manufacturing of adhesive sheet with release liner)
Similar to Example 1, the pressure-sensitive adhesive composition was applied to the release liner of Example 2 so that the thickness of the pressure-sensitive adhesive layer after drying was 30 μm, dried at 90 ° C. for 1 minute, and then the base. The pressure-sensitive adhesive layer was formed by transferring to a material sheet to prepare a pressure-sensitive adhesive sheet with a release liner according to Example 2. Table 1 shows the performance evaluation results of this adhesive sheet.

[Comparative Example 1]
Similar to Example 1, with a release liner of Comparative Example 1 except that the conditions for sandblasting the entire surface of the metal roll were adjusted so that the maximum height roughness Rz of the uneven portion was 1.2 μm. An adhesive sheet was prepared. Table 1 shows the performance evaluation results of this adhesive sheet.

[Comparative Example 2]
Comparative examples except that the conditions for etching a plurality of striped concave portions parallel to each other on the metal roll were adjusted so that the width of the striped convex portion was 8 μm and the height of the striped convex portion was 5 μm. In the same manner as in No. 1, an adhesive sheet with a release liner of Comparative Example 2 was produced. Table 1 shows the performance evaluation results of this adhesive sheet.

[Comparative Example 3]
Comparative Example 3 in the same manner as in Comparative Example 1 except that the conditions for etching a plurality of striped concave portions parallel to each other on the metal roll were adjusted so that the height of the striped convex portions was 3 μm. An adhesive sheet with a peeling liner was prepared. Table 1 shows the performance evaluation results of this adhesive sheet.

In the pressure-sensitive adhesive sheet with a release liner of Examples 1 and 2, the width of the striped convex portion is 10 to 150 μm, the height of the striped convex portion is 5 to 40 μm, and the center of the striped convex portions is located on each other. The line spacing is 200 to 1000 μm, uneven portions are provided between the striped convex portions, the maximum height roughness Rz of the uneven portions is larger than 3 μm, and the striped convex portions have. Since it is smaller than the height, it has excellent air bleeding property during construction and also has good repositioning suitability. In the adhesive sheet with a release liner of Comparative Example 1, the height of the striped convex portion was 5 μm or more, so that the air bleeding property was good, but the maximum height Rz of the uneven portion was 3 μm or less, so that it was suitable for repositioning. Was defective. In the adhesive sheet with a release liner of Comparative Example 2, the maximum height roughness Rz of the uneven portion is 3 μm or less, the width of the striped convex portion is less than 10 μm, the air bleeding property is poor, and the repositioning suitability is also good. It was bad. In the adhesive sheet with a release liner of Comparative Example 3, the maximum height roughness Rz of the uneven portion is 3 μm or less, the height of the striped convex portion is less than 5 μm, the air bleeding property is poor, and the position is suitable for repositioning. Was also bad.

The adhesive sheet with a release liner of the present invention is excellent in air bleeding property during construction and excellent in repositioning suitability. It can be suitably used as a label or the like.

1 ... Adhesive sheet with release liner, 10 ... Release liner, 20 ... Adhesive layer, 30 ... Base sheet, 40 ... Adhesive sheet, 50 ... Adhesive, 11. .. Striped convex part, 12 ... Width of striped convex part, 13 ... Height of striped convex part, 14 ... Center line spacing between striped convex parts, 15 ... Concavo-convex part , 22 ... Striped recesses, 24 ... Transfer surface with irregularities

Claims (2)

An adhesive sheet with a release liner in which a release liner, an adhesive layer, and a base sheet are laminated in this order.
The peeling liner has a plurality of striped protrusions parallel to each other on the peeling treatment surface in contact with the pressure-sensitive adhesive layer.
The width of the striped convex portion is 10 to 150 μm, and the height of the striped convex portion is 5 to 40 μm.
The distance between the center lines of the striped protrusions is 200 to 1000 μm.
Between the adjacent said stripe-shaped convex portion, the concave-convex portion is provided, the maximum height roughness Rz of the uneven portion is larger than 3 [mu] m, and, rather smaller than the height of the stripe-shaped protrusion,
An adhesive sheet with a release liner in which the heights of the uneven portions are not uniform. The peeling surface has a plurality of striped protrusions parallel to each other.
The width of the striped convex portion is 10 to 150 μm, and the height of the striped convex portion is 5 to 40 μm.
The distance between the center lines of the striped protrusions is 200 to 1000 μm.
Between the adjacent said stripe-shaped convex portion, the concave-convex portion is provided, the maximum height roughness Rz of the uneven portion is larger than 3 [mu] m, and, rather smaller than the height of the stripe-shaped protrusion,
A peeling liner in which the heights of the uneven portions are not uniform.

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