JP2005048071A - Adhesive tape or sheet, and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an adhesive tape or sheet having excellent reworkability and operability of correction of a stuck position; and to provide a method for producing the adhesive tape or sheet. <P>SOLUTION: The adhesive tape or sheet has an adhesive layer formed at least on one surface of a supporter. Partially concave parts are formed in the adhesive layer at least on one face of the supporter, and fiber-protruded structural parts in a structure in which the fiber is protruded to the outside part from the surface of the adhesive layer is formed on the wall faces of the concave parts. The fiber-protruded structural part is preferably a fiber-raised part in a structure in which the fiber stands on the wall face of the concave part partially formed in the adhesive layer at least at one face of the supporter so as to protrude to the outer side from the surface of the adhesive layer. Hole parts are preferable as the concave parts of the adhesive layer. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a pressure-sensitive adhesive tape or sheet and a method for producing the same, and more specifically, a pressure-sensitive adhesive tape or sheet excellent in reworkability and adhesion position correcting workability when an adherend is bonded using the pressure-sensitive adhesive tape or sheet. And a manufacturing method thereof.

  When adhering an adhesive tape or sheet to various adherends, it is required to easily and firmly adhere to a predetermined position of the adherend. Therefore, the adhesive tape or sheet is temporarily fixed. In addition, it is required to have a characteristic (so-called “reworkability”) that allows re-sticking, and a characteristic that enables correction of the sticking position (sticking position correcting workability). For example, an operation of bonding a flooring material to a floor can be given as an operation for bonding to a predetermined position. In the operation of laminating the flooring material to the floor, the flooring material must be inserted, and for that purpose, after the flooring material is inserted, the flooring material must be moved a considerable distance along the floor. . In such an operation, when a pressure-sensitive adhesive tape or sheet having a pressure-sensitive adhesive layer with a normal pressure-sensitive adhesive is used, the flooring material is inserted along the floor after insertion of the flooring material for tackiness and initial adhesiveness of the pressure-sensitive adhesive. It is impossible to move. Therefore, a method using a pressure-sensitive adhesive tape or sheet whose adhesive strength has been temporarily reduced using water or an organic solvent, a water-swelling granular material of a water-absorbing polymer interposed between the surface of the pressure-sensitive adhesive layer and the adherend A method (see Patent Document 1), a method of reducing an initial adhesion area using a pressure-sensitive adhesive tape or sheet having a concavo-convex structure on the surface of the pressure-sensitive adhesive layer (see Patent Document 2), There has been proposed a method of controlling the initial adhesive force using an adhesive tape or sheet in which a non-adhesive substance having a shape is formed in a convex shape (see Patent Document 3).

Japanese Patent No. 3296769 JP 2002-121503 A JP-A-7-310057

  However, for example, as described in Japanese Patent No. 3296769, water is used in a method in which a water-swelling granular material of a water-absorbing polymer is interposed between the surface of the pressure-sensitive adhesive layer and the adherend. In addition, water essentially inhibits adhesion, and it is not desirable to use it from the reliability of adhesion.

  In addition, as described in JP-A No. 2002-121503, in the method of reducing the initial adhesion area using an adhesive tape or sheet having an uneven structure on the surface of the adhesive layer, the adhesive tape or sheet Since the pressure-sensitive adhesive layer is present on the surface, the width of the position that can be corrected from the temporarily placed position is limited, and it cannot be said that the workability for correcting the applied position is sufficient.

  Furthermore, as described in JP-A-7-310057, initial adhesion using a pressure-sensitive adhesive tape or sheet in which a solid non-adhesive substance is formed in a convex shape on the surface of the pressure-sensitive adhesive layer. In the method of controlling the force, the non-adhesive substance is only bonded to the surface of the adhesive layer, and the structure of the non-adhesive substance is not controlled. Inevitably, the amount of non-adhesive substance used is inevitably increased, which is not desirable in terms of adhesive properties.

Therefore, the objective of this invention is providing the adhesive tape or sheet | seat which is excellent in rework property and sticking position correction workability | operativity, and its manufacturing method.
Another object of the present invention is to provide an adhesive tape or sheet useful as an adhesive tape or sheet for attaching a flooring material, and a method for producing the same.

  As a result of intensive studies to achieve the above-described object, the present inventors have found that the adhesive tape or the sheet is provided with a specific structure portion with fibers, and the adhesive tape or sheet is placed at a predetermined position on the adherend. It has been found that when adhering to the tape, temporary fixing and re-sticking can be performed, and correction of the sticking position can also be performed. The present invention has been completed based on these findings.

  That is, the present invention is a pressure-sensitive adhesive tape or sheet in which a pressure-sensitive adhesive layer is formed on at least one surface of a support, and a recess is partially formed in the pressure-sensitive adhesive layer on at least one surface of the support. And a convex fiber structure having a structure in which fibers protrude from the surface of the pressure-sensitive adhesive layer to the outside of the surface of the pressure-sensitive adhesive layer.

  The fiber convex structure portion has a structure in which fibers are erected from the wall surface of the recess partly formed on the pressure-sensitive adhesive layer on at least one surface of the support to the outside of the surface of the pressure-sensitive adhesive layer. It is preferable that it is a fiber raising part. The concave portion of the pressure-sensitive adhesive layer is preferably a hole.

  In the present invention, the support is a pressure-sensitive adhesive tape or a release liner for sheets, a pressure-sensitive adhesive layer is formed on one side of the pressure-sensitive adhesive tape or sheet release liner, and a pressure-sensitive adhesive is formed from the wall surface of the concave portion of the pressure-sensitive adhesive layer. It is preferable that the fiber convex structure part of the structure where the fiber protrudes outside the surface of the layer is formed.

  The said adhesive tape or sheet can be used conveniently as an adhesive tape or sheet for flooring material sticking.

  The present invention is also a method for producing the pressure-sensitive adhesive tape or sheet, wherein the flocking is performed on the wall surface of the recess partly formed on the pressure-sensitive adhesive layer on at least one surface of the support using the flocking method. A pressure-sensitive adhesive tape or sheet characterized by forming a fiber convex structure portion having a structure in which fibers protrude outward from the surface of the pressure-sensitive adhesive layer on the wall surface of the concave portion of the pressure-sensitive adhesive layer by processing. It is a manufacturing method. In this production method, a method of performing flocking on the wall surface of the concave portion of the pressure-sensitive adhesive layer in a state where a release liner having a hole at a portion corresponding to the concave portion of the pressure-sensitive adhesive layer is superimposed on the surface of the pressure-sensitive adhesive layer Is preferred.

  The pressure-sensitive adhesive tape or sheet of the present invention is excellent in reworkability and pasting position correction workability. Therefore, the adhesive tape or sheet of the present invention is useful as an adhesive tape or sheet for attaching a flooring material.

(Fiber convex structure)
In the pressure-sensitive adhesive tape or sheet of the present invention, a concave portion is partially formed in the pressure-sensitive adhesive layer on at least one surface of the support, and the wall surface of the concave portion of the pressure-sensitive adhesive layer (side surface on the concave side of the pressure-sensitive adhesive layer) In addition, a fiber convex structure having a structure in which fibers protrude from the surface of the pressure-sensitive adhesive layer to the outer side is formed. As described above, the fiber convex structure portion has a structure in which the fibers protrude from the concave wall surface of the pressure-sensitive adhesive layer to the outer side than the surface of the pressure-sensitive adhesive layer. It is not necessary to protrude outward from the surface of the adhesive layer, and at least some of the fibers (for example, fibers formed on the upper side of the concave wall surface of the adhesive layer) are external to the surface of the adhesive layer. It only has to protrude to the side. Further, as the fiber protruding outward from the surface of the pressure-sensitive adhesive layer, it is not necessary that the entire length of one fiber protrudes outward from the surface of the pressure-sensitive adhesive layer, and at least a part of the single fiber. However, it is only necessary to protrude outward from the surface of the pressure-sensitive adhesive layer. Furthermore, the fiber convex structure portion does not have to be formed on the entire wall surface of the concave portion of the pressure-sensitive adhesive layer, and may be formed on at least a part of the wall surface of the concave portion of the pressure-sensitive adhesive layer. In the present invention, the fiber convex structure can be configured such that an adhesive tape or a sheet can be temporarily bonded to the adherend, and then firmly bonded to the adherend by pressure bonding. It is important to have

  In addition, the recessed part of an adhesive layer is a hole (through-hole part) so that it may show below, and an adhesive tape or sheet is a base-less type double-sided adhesive tape or sheet so that it may show below. In this case, since the hole portion as the concave portion is an open portion on both surface sides of the pressure-sensitive adhesive layer, the fiber in the fiber convex structure portion sticks to the outer side than the surface of the pressure-sensitive adhesive layer. The surface of the adhesive layer can be at least one surface of the adhesive layer, and is preferably the surface on one side of the adhesive layer. Of course, when the concave portion of the pressure-sensitive adhesive layer is a depressed portion as shown below, or when the pressure-sensitive adhesive tape or sheet is a pressure-sensitive adhesive tape or sheet with a substrate as shown below, Since the concave portion (the depressed portion or the hole portion) is an open portion only on one side of the pressure-sensitive adhesive layer, the surface of the pressure-sensitive adhesive layer that is the open portion has the fibers of the fiber convex structure portion, It can be set as the surface of the adhesive layer which protrudes outside the surface of the adhesive layer.

  The fiber convex structure is not particularly limited as long as the fiber is a structure formed in a convex shape that protrudes outward from the surface of the pressure-sensitive adhesive layer. For example, the fiber is a concave portion of the pressure-sensitive adhesive layer. The fiber raising part which has the structure which stands up and protrudes from the wall surface to the outside rather than the adhesive layer surface (especially the end part of the fiber protrudes), and the mass of the fiber is the adhesive layer concave wall surface And a convex fiber structure having a structure in which a part of the fiber protrudes outward from the surface of the pressure-sensitive adhesive layer. The fiber convex structure portion may be composed of a single structure, or may be composed of a structure in which a plurality of structures are combined.

  In addition, one fiber convex structure part is normally comprised by the some fiber. The number and density of the fibers constituting one fiber convex structure portion are not particularly limited, and can be appropriately selected according to the intended reworkability, sticking position correction workability, the type of adherend, and the like.

  As the fiber convex structure portion, a fiber raised portion having a structure in which the fiber stands up and protrudes outward from the surface of the pressure-sensitive adhesive layer from the wall surface of the concave portion in which the fibers are partially formed in the pressure-sensitive adhesive layer is preferable. .

  FIG. 1 is a schematic view partially showing an example of the pressure-sensitive adhesive tape or sheet of the present invention, (a) is a schematic plan view seen from the top surface of the pressure-sensitive adhesive tape or sheet, and (b) is an XY in (a). It is a schematic sectional drawing of a line. In FIG. 1, 1 is an adhesive tape or sheet, 2 is an adhesive layer, 2a is a recess of the adhesive layer 2, 2a1 is a wall surface of the recess 2a of the adhesive layer 2, 2b is a surface of the adhesive layer 2, and 3 is an adhesive. Tape or sheet release liner (sometimes simply referred to as "release liner"), 4 is a release liner having a hole, 4a is a hole in the release liner 4, and 5 is a fiber raised portion. The pressure-sensitive adhesive tape or sheet 1 has a pressure-sensitive adhesive layer 2 formed on one side of a release liner 3 as a support, and the pressure-sensitive adhesive layer 2 has a recess 2a in the form of a through hole. The recess 2 a is partially formed in the pressure-sensitive adhesive layer 2. That is, the opening of the recess 2 a is partially formed on the surface of the pressure-sensitive adhesive layer 2. The pressure-sensitive adhesive layer 2 has a structure in which the surface 2b is protected by the release liner 4 having the hole 4a. The hole 4a of the release liner 4 and the recess 2a of the pressure-sensitive adhesive layer 2 are provided. And have a corresponding positional relationship. Specifically, the wall surface of the hole 4a and the wall surface of the recessed part 2a have the structure formed continuously. Furthermore, the fiber raising part 5 is provided in the wall surface 2a1 of the recessed part 2a of the adhesive layer 2 as a fiber convex structure part. The fiber raising portion 5 has a structure in which fibers stand up and protrude from the wall surface 2a1 of the recess 2a to the outside side of the surface 2b of the pressure-sensitive adhesive layer 2 (that is, the release liner 4 side having the hole 4a). is doing.

In FIG. 1, in the pressure-sensitive adhesive layer 2, the recess 2 a is provided in a shape that forms a plurality of lines as a whole. Therefore, the fiber raising part 5 also has a shape that forms a plurality of lines as a whole. In the recess 2a shown in FIG. 1, the interval between the lines (interval of the center of each line) is 10 mm, and the interval between the recesses included in one line (interval of the center of each recess) Is 10 mm. Moreover, the shape of the opening part in the adhesive layer surface of one recessed part is a substantially circular shape (area is about 0.8 mm < ² >) whose radius is about 0.5 mm. Furthermore, the adjacent lines have a configuration in which the respective concave portions in the other line are formed in a portion located in the central portion between the concave portions in one line. The fiber raising part 5 is formed in the wall surface of such a recessed part 2a.

  In addition, the photograph regarding the shape of the fiber raising part currently formed in FIGS. 2-3 at the recessed part wall surface of an adhesive layer is shown. FIG. 2 is a view showing a photograph relating to the shape of the fiber raised portion formed on the concave wall surface of the pressure-sensitive adhesive layer, as viewed from the top surface of the pressure-sensitive adhesive layer. FIG. 3 is a view showing a photograph relating to the shape of the fiber raised portion formed on the concave wall surface of the pressure-sensitive adhesive layer, and is a view showing the main part of the fiber raised portion according to FIG. 2. The photographs shown in FIGS. 2 to 3 are photographs taken using a trade name “VH-6200” (manufactured by KEYENCE) as a digital microscope under a magnification ratio of 50 to 175 times.

  As the structure of such a fiber raising portion, for example, (1) one end of one fiber is bonded and fixed to the concave wall surface of the pressure-sensitive adhesive layer, and the other end is not fixed (free In a state where the fibers stand up and protrude in a substantially I-shape outward from the surface of the pressure-sensitive adhesive layer (the structure shown in FIG. 1), (2) In the state where the central part is bonded to the concave wall surface of the pressure-sensitive adhesive layer and both ends of the fiber are not fixed (free), the fiber stands up in a substantially V-shape outside the surface of the pressure-sensitive adhesive layer. (3) Both ends of one fiber are bonded and fixed to the concave wall surface of the adhesive layer, and the center of the fiber is not fixed (free). In addition to the structure in which the fibers stand up and protrude in an inverted substantially U shape on the outer side than the surface of the adhesive layer, from the concave wall surface of the adhesive layer A structure in which the fibers stand up and protrude in the shape of a substantially W shape, a substantially M shape, a substantially N shape, a substantially O shape, or the like on the outer side of the surface of the adhesive layer. And the like. As the structure of the fiber raising portion, the structure (1) (a structure in which fibers stand up from the surface of the concave portion of the pressure-sensitive adhesive layer to the outside of the surface of the pressure-sensitive adhesive layer and protrude substantially in an I shape) is preferable. . Of course, the fiber raised portion is a state in which the fibers stand up straight from the wall surface of the concave portion of the pressure-sensitive adhesive tape or the pressure-sensitive adhesive layer for the sheet, such as an I-shape, and protrude outward from the surface of the pressure-sensitive adhesive layer. Alternatively, it may be in a state of having a form such as a jagged shape, a wavy shape, a loop shape, etc., standing up as a whole and protruding outward from the surface of the pressure-sensitive adhesive layer.

  The fiber convex structure portion is formed on the wall surface of the concave portion partially provided in the pressure-sensitive adhesive layer. Therefore, the overall shape of the fiber convex structure portion corresponds to the overall shape of the concave portion. become. The overall shape of the fiber convex structure part is not particularly limited, and can be appropriately selected according to the intended reworkability, pasting position correction workability, the type of adherend, and the predetermined pattern shape. You may have.

  For example, when the fiber convex structure portion is formed in a pattern shape as shown in FIG. 1 as a whole, that is, the fiber convex structure portion as a whole forms a plurality of lines. When provided, the interval between the lines can be selected from a range of about 1 to 100 mm (preferably 3 to 50 mm, more preferably 5 to 40 mm), for example. Moreover, the space | interval between each fiber convex-shaped structure part contained in one line can be selected from the range of about 1-100 mm (preferably 3-50 mm, more preferably 5-40 mm), for example. Furthermore, the positional relationship between the fiber convex structures in adjacent lines is not particularly limited, and may be a positional relationship that is a lattice shape as a whole, or a positional relationship that is an indefinite shape as a whole. Good.

  In addition, about one fiber convex-shaped structure part, it does not restrict | limit especially as a shape in the adhesive layer surface, For example, a substantially circular shape, a substantially polygonal shape, and an indefinite shape may be sufficient. Moreover, the number of the fiber convex structure part currently formed in the adhesive layer is not restrict | limited.

  On the surface of the pressure-sensitive adhesive layer, the total area of the portion where the fiber convex structure portion is provided (the area of the total fiber convex structure portion) is not particularly limited, and is, for example, 0 with respect to the total surface area of the pressure-sensitive adhesive layer. The area is desirably 0.001 to 20% (preferably 0.005 to 15%, more preferably 0.01 to 10%). If the area on the pressure-sensitive adhesive layer surface of all fiber convex structures is less than 0.001% with respect to the total surface area of the pressure-sensitive adhesive layer, the effect of reducing the initial adhesive strength is reduced, and reworkability and pasting position correction work are reduced. Sex is reduced. On the other hand, when the area on the surface of the pressure-sensitive adhesive layer of the all-fiber convex structure exceeds 20% with respect to the total surface area of the pressure-sensitive adhesive layer, the rework property and the workability for correcting the attaching position are improved. Adhesive strength to the adherend is reduced.

Moreover, it does not restrict | limit especially as an area in the adhesive layer surface of each fiber convex structure part, For example, 0.1-10 mm < ² > (preferably 0.3-5 mm < ² >, More preferably, 0.5-3 mm < ² >. ) Is preferably selected from a range of about, but may be less than 0.1 mm ^{2 or more} than 10 mm ² .

Furthermore, for example, when a plurality of fiber convex structure portions are provided so that the area of each fiber convex structure portion on the pressure-sensitive adhesive layer surface is 0.1 to 10 mm ² , between the fiber convex structure portions The shortest interval may be, for example, about 1 to 100 mm (preferably 3 to 50 mm, more preferably 5 to 40 mm).

  In addition, as an area in the adhesive layer surface of a fiber convex structure part, it can be set as the area of the part enclosed by the fiber convex structure part. That is, the area of the fiber convex structure portion on the surface of the pressure-sensitive adhesive layer corresponds to the area of the opening on the surface of the pressure-sensitive adhesive layer of the concave portion.

  The fiber constituting such a fiber convex structure is not particularly limited, and may be any of natural fiber, semi-synthetic fiber, and synthetic fiber. More specifically, examples of the fiber include cotton fiber, rayon fiber, polyamide fiber [aliphatic polyamide fiber, aromatic polyamide fiber (so-called aramid fiber), etc.], polyester fiber (trade name “Tetron”, etc.). Polyacrylonitrile fiber, carbon fiber, acrylic fiber, polyvinyl alcohol fiber (so-called vinylon fiber), polyethylene fiber, polyimide fiber, and fluorine resin fiber. As the fiber, cotton fiber, rayon fiber, polyamide fiber, and polyester fiber are suitable.

  Only one type of fiber may be used, or two or more types of fibers may be used in combination.

  As such a fiber, a short fiber can be suitably used. If the length of the fiber is increased, the adhesive force of the adhesive tape or sheet to the adherend is reduced, which is not preferable. The length of the fiber is desirably about 0.1 to 5 mm (preferably 0.3 to 5 mm, more preferably 0.3 to 2 mm). If the length of the fiber is too short, the pressure applied when the pressure-sensitive adhesive layer is adhered to the adherend may be low, which is not preferable because the reworkability and the pasting position correction workability are lowered. Further, if the length of the fiber is too short, it is difficult to manufacture and expensive, which is not preferable from the viewpoint of cost. On the other hand, if the length of the fiber is too long, the recovery rate of the adhesive strength is lowered, which is not desirable.

  The thickness of the fiber is not particularly limited, and can be selected from a range of about 0.1 to 20 denier (preferably 0.5 to 15 denier, more preferably 1 to 6 denier). If the thickness of the fiber is too large, the pressure applied when the pressure-sensitive adhesive layer is adhered to the adherend is increased due to a decrease in flexibility, which is not preferable. On the other hand, if the thickness of the fiber is too thin, the effect of reducing the initial adhesive strength is lowered, and the reworkability and the workability for correcting the attachment position are lowered.

  The method for forming the fiber convex structure portion (particularly, the fiber raising portion) is not particularly limited, but as shown below, a flocking method (particularly, an electrostatic flocking method) can be suitably used. it can. As the electrostatic flocking processing method, any of an up method, a down method, and a side method may be used. In addition, when forming a fiber convex-shaped structure part in the wall surface of the recessed part of an adhesive layer by a flocking method, a hole is provided in the position corresponding to the recessed part (recessed part which forms a fiber convex-shaped structure part) of an adhesive layer. It is preferable to use a release substrate (particularly a release film) that has the same. Such a release substrate can also be used as a release liner.

(Adhesive layer)
A concave portion is partially formed in the pressure-sensitive adhesive layer. Such a recess may be a depression, but is preferably a hole (through hole), and a hole is particularly preferable among the holes. In such a recess, the shape of the entire recess, the shape of the opening on the surface of the adhesive layer of each recess, the total area of the opening on the surface of the adhesive layer of the recess, the area of the opening on the surface of the adhesive layer of each recess For example, it can correspond to the fiber convex structure.

  In addition, when a recessed part is a depression part, the depth in particular is not restrict | limited, The depth corresponds to 1% or more (for example, 1-99%, preferably 30-90%) of the thickness of an adhesive layer. It can be suitably selected from the range.

  In addition, as shown below, when the adhesive tape or sheet is a base-less double-sided adhesive tape or sheet, a depressed portion as a recess is formed on at least one surface of the adhesive layer. Preferably, it is the surface of one side of an adhesive layer. Furthermore, when the pressure-sensitive adhesive tape or sheet is a double-coated pressure-sensitive adhesive tape or sheet with a base material as shown below, the recess (such as a depressed portion or a hole) is at least one of the pressure-sensitive adhesive layers. It can be formed on the surface, preferably the surface of the pressure-sensitive adhesive layer on one side.

  In the case where the recess is a hole, as a method of forming the hole, for example, a well-known or conventional hole forming machine [in particular, a convex structure (projection structure) of various shapes and a relative to the convex structure. Punching method using a perforation forming machine having a concave structure to be formed], a punching method using heat or light (for example, a method using a thermal head, a halogen lamp, a xenon lamp, a flash lamp, a laser beam, etc.), a mold ( For example, a molding method using a mold having a convex portion or the like may be used. In addition, when a recessed part is a depression part, as a method of forming a depression part, the formation method similar to a hole part is employable.

  When forming the fiber convex structure portion in the concave portion of the pressure-sensitive adhesive layer, as described above, the hole portion is provided at a position corresponding to the predetermined portion where the fiber convex structure portion is formed on the surface of the pressure-sensitive adhesive layer. When using the peeling base material (especially peeling film) which is carrying out, it is preferable to form the recessed part of an adhesive layer with the hole of the said peeling base material. For example, on the surface of the pressure-sensitive adhesive layer in which no recess is formed, a peeling base material that does not have holes is laminated and laminated, and punching processing such as perforation is performed from the side of the peeling base material using a hole forming machine. By carrying out the above, it is possible to simultaneously produce the concave portion of the pressure-sensitive adhesive layer (particularly, the hole portion by perforation) and the hole portion of the release substrate. By such a method, it can form easily so that the recessed part of an adhesive layer and the hole of a peeling base material may have a corresponding positional relationship. That is, the wall surface of the concave portion of the pressure-sensitive adhesive layer and the wall surface of the hole portion of the release substrate can be produced in a continuously formed configuration. Therefore, the wall surface of the concave portion of the pressure-sensitive adhesive layer is opened (opened) through the hole of the release substrate, and, for example, from the side of the release substrate through the hole of the release substrate, By performing flocking on the wall surface of the recess, fibers protrude from the wall surface to the outer side of the surface of the pressure-sensitive adhesive layer (the surface on the side of the peeling substrate having holes) from the wall surface. It is possible to efficiently form the fiber convex structure having the structure.

  In the punching process when forming the hole as the concave portion of the pressure-sensitive adhesive layer, the pressure-sensitive adhesive tape or sheet is a substrate-less type pressure-sensitive adhesive tape or sheet, and both surfaces of the pressure-sensitive adhesive layer are protected by a release liner. In this case, punching processing may be performed on the base material-less type adhesive tape or the entire sheet, but half-cut type punching processing is performed so that a cut line is not formed only on one release liner. Is preferred.

  The pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer is not particularly limited, and examples thereof include rubber-based pressure-sensitive adhesives, acrylic pressure-sensitive adhesives, polyester-based pressure-sensitive adhesives, urethane-based pressure-sensitive adhesives, polyamide-based pressure-sensitive adhesives, epoxy-based pressure-sensitive adhesives, and vinyl alkyls. Known pressure-sensitive adhesives such as ether pressure-sensitive adhesives, silicone pressure-sensitive adhesives, and fluorine-based pressure-sensitive adhesives can be used. Further, the adhesive may be a hot melt adhesive. An adhesive can be used individually or in combination of 2 or more types. The pressure-sensitive adhesive may be any type of pressure-sensitive adhesive such as an emulsion-based pressure-sensitive adhesive, a solvent-based pressure-sensitive adhesive, an oligomer-based pressure-sensitive adhesive, and a solid pressure-sensitive adhesive.

  In addition to the polymer component such as an adhesive component (base polymer), the adhesive is a crosslinking agent (for example, a polyisocyanate-based crosslinking agent, an alkyl etherified melamine compound-based crosslinking agent, etc.) depending on the type of the adhesive. ), Tackifiers (for example, rosin derivative resins, polyterpene resins, petroleum resins, phenol resins, etc.), plasticizers, fillers, anti-aging agents, and other suitable additives may be included. When the pressure-sensitive adhesive layer is cross-linked when forming the pressure-sensitive adhesive layer, a heat cross-linking method by heating, a UV cross-linking method by UV irradiation (UV cross-linking method), an electron beam cross-linking method by electron beam irradiation (EB cross-linking method), Any of natural curing methods for curing may be used.

  Adhesives include natural rubber and various synthetic rubbers (eg polyisoprene rubber, styrene / butadiene rubber, styrene / isoprene / styrene block copolymer rubber, styrene / butadiene / styrene block copolymer rubber, recycled rubber, butyl rubber) , Polyisobutylene, etc.) based rubber-based adhesive; acrylic polymer (homopolymer or copolymer) using one or more (meth) acrylic acid alkyl esters as monomer components An acrylic pressure-sensitive adhesive having a base polymer can be preferably used.

Examples of the (meth) acrylic acid alkyl ester in the acrylic pressure-sensitive adhesive include, for example, methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, isopropyl (meth) acrylate, (meth ) Butyl acrylate, isobutyl (meth) acrylate, s-butyl (meth) acrylate, t-butyl (meth) acrylate, pentyl (meth) acrylate, hexyl (meth) acrylate, heptyl (meth) acrylate , Octyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isooctyl (meth) acrylate, nonyl (meth) acrylate, isononyl (meth) acrylate, decyl (meth) acrylate, (meth) acrylic acid Isodecyl, undecyl (meth) acrylate, dodecyl (meth) acrylate, (Meth) acrylic acid tridecyl, (meth) acrylic acid tetradecyl, (meth) acrylic acid pentadecyl, (meth) acrylic acid hexadecyl, (meth) acrylic acid heptadecyl, (meth) acrylic acid octadecyl, (meth) acrylic acid nonadecyl, (meta And (meth) acrylic acid C _1-20 alkyl ester such as eicosyl acrylate [preferably (meth) acrylic acid C _4-18 alkyl (linear or branched alkyl) ester]. The (meth) acrylic acid alkyl ester can be appropriately selected according to the intended tackiness and the like. The (meth) acrylic acid alkyl ester can be used alone or in combination of two or more.

  Moreover, in the said acrylic adhesive, even if the (meth) acrylic-acid alkylester and the other monomer (copolymerizable monomer) copolymerizable with the said (meth) acrylic-acid alkylester as needed are used together Good. Examples of such copolymerizable monomers include (meth) acrylic acid, itaconic acid, maleic acid, fumaric acid, crotonic acid, isocrotonic acid and other carboxyl group-containing monomers or anhydrides thereof; sodium vinyl sulfonate, etc. Sulfonic acid group-containing monomers of styrene; aromatic vinyl compounds such as styrene and substituted styrene; cyano group-containing monomers such as acrylonitrile; olefins such as ethylene, propylene and butadiene; vinyl esters such as vinyl acetate; Amide group-containing monomers such as acrylamide, methacrylamide, N-vinylpyrrolidone, N, N-dimethyl (meth) acrylamide; hydroxyl group-containing monomers such as hydroxyalkyl (meth) acrylate and glycerol dimethacrylate; ) Aminoethyl acrylate, (meth) a Amino group-containing monomers such as liloylmorpholine; Imido group-containing monomers such as cyclohexylmaleimide and isopropylmaleimide; Epoxy group-containing monomers such as glycidyl (meth) acrylate and methyl glycidyl (meth) acrylate; 2 -Isocyanate group-containing monomers such as methacryloyloxyethyl isocyanate. Examples of the copolymerizable monomer include triethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, ethylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, and neopentyl glycol di Multifunctional such as (meth) acrylate, 1,6-hexanediol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol hexa (meth) acrylate, divinylbenzene And a copolymerizable monomer (polyfunctional monomer). A copolymerizable monomer can be used individually or in combination of 2 or more types.

  As a method for forming the pressure-sensitive adhesive layer, a known or conventional forming method can be adopted. For example, in the case of a pressure-sensitive adhesive tape or sheet having a pressure-sensitive adhesive tape or a base material for sheet, A method of applying an adhesive on a substrate (adhesive tape or sheet substrate) (application method), applying an adhesive on a release film such as a release liner to form an adhesive layer, and then applying the adhesive Examples thereof include a method (transfer method) of transferring the agent layer onto the substrate. In the case of a substrate-less pressure-sensitive adhesive tape or sheet having no pressure-sensitive adhesive tape or sheet substrate, the pressure-sensitive adhesive layer is formed by applying a pressure-sensitive adhesive on the release surface of a release liner as a support. Examples thereof include a method (application method).

  It does not restrict | limit especially as thickness of an adhesive layer, For example, it can select from the range of about 1-1000 micrometers (preferably 10-500 micrometers).

(Support)
As the support for supporting the pressure-sensitive adhesive layer, the pressure-sensitive adhesive tape or sheet is a base material (the pressure-sensitive adhesive tape or the base material for the sheet) when the pressure-sensitive adhesive tape or sheet is a pressure-sensitive adhesive tape or sheet having a pressure-sensitive adhesive layer on one or both sides. On the other hand, in the case of a double-sided pressure-sensitive adhesive tape or sheet of a base material-less type, a release liner (separator) can be used. In the case where the pressure-sensitive adhesive tape or sheet is a pressure-sensitive adhesive tape or sheet having a base material type on one or both surfaces, the pressure-sensitive adhesive layer is formed on one or both surfaces of the base material as a support. In addition, a fiber convex structure is formed on the wall surface of the concave portion of the pressure-sensitive adhesive layer formed on one side or both sides of the base material, and the surface of the pressure-sensitive adhesive layer is a release surface on the back side of the base material or a release liner. It may be protected by. On the other hand, when the pressure-sensitive adhesive tape or sheet is a substrate-less double-sided pressure-sensitive adhesive tape or sheet, the release liner serves as a support for the pressure-sensitive adhesive layer, and the fiber convex structure portion is formed on the wall surface of the concave portion of the pressure-sensitive adhesive layer. Is formed. In this case, when the recessed part formed in an adhesive layer is a depression part, the depression part as a recessed part can be formed in any one adhesive surface of an adhesive layer. Note that the release liner as the support supports the pressure-sensitive adhesive layer and protects the surface of the pressure-sensitive adhesive layer until the pressure-sensitive adhesive tape or sheet is used.

(Base material)
Examples of the base material (adhesive tape or base material for sheet) include plastic base materials such as plastic films and sheets; metal base materials such as metal foils and metal plates; paper (quality paper, Japanese paper, craft paper) Paper base materials such as glassine paper, synthetic paper, top coat paper, etc .; fiber base materials such as cloth, nonwoven fabric, and net; rubber base materials such as rubber sheets; foams such as foam sheets, etc. Thin leaves can be used. The substrate may have a single layer form or may have a laminated form. For example, as the base material, a plastic base material and another base material (paper base material, etc.) are laminated (2-3 layers composite) by lamination or coextrusion. Also good.

  The substrate is preferably a plastic film or sheet. Examples of such a plastic film or sheet material (plastic material) include α-polyethylene (PE), polypropylene (PP), ethylene-propylene copolymer, ethylene-vinyl acetate copolymer (EVA), and the like. Olefin resins containing olefin as a monomer component; polyester resins such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT); polyvinyl chloride (PVC); vinyl acetate resin; polyphenylene sulfide ( PPS); amide resins such as polyamide (nylon) and wholly aromatic polyamide (aramid); polyimide resins; polyether ether ketone (PEEK) and the like. The plastic material may be used alone, or may be used in a mixed state in which two or more kinds are combined. The plastic film or sheet may be an unstretched type or a stretched type subjected to a uniaxial or biaxial stretching process.

  In addition, for the base material, an inorganic filler (for example, titanium oxide, zinc oxide, etc.), an anti-aging agent (for example, an amine-based anti-aging agent, a quinoline-based anti-aging agent, a hydroquinone-based anti-aging agent, Phenolic antioxidants, phosphorus antioxidants, phosphite ester antioxidants, antioxidants, UV absorbers (eg salicylic acid derivatives, benzophenone UV absorbers, benzotriazole UV absorbers, hindered amines) And other additives such as lubricants, plasticizers, and colorants (eg, pigments, dyes, etc.).

  One or both sides of the base material are subjected to appropriate surface treatments such as physical treatment such as corona treatment and plasma treatment, and chemical treatment such as primer for the purpose of improving adhesion to the adhesive layer. It may be.

  As thickness of a base material, it can select from the range of about 10-300 micrometers, for example, Preferably about 30-200 micrometers.

(Release liner)
Examples of the release liner include a base material having a release treatment layer with a release treatment agent on at least one surface, and a fluorine-based polymer (eg, polytetrafluoroethylene, polychlorotrifluoroethylene, polyvinyl fluoride, polyfluoride). Low adhesive substrates made of vinylidene, tetrafluoroethylene / hexafluoropropylene copolymer, chlorofluoroethylene / vinylidene fluoride copolymer, etc.) and nonpolar polymers (for example, olefinic resins such as polyethylene and polypropylene) For example, a low-adhesive substrate made of can be used.

  As the release liner, for example, a release liner in which a release treatment layer is formed on at least one surface of the release liner base material can be suitably used. Examples of such release liner substrates include polyester films (polyethylene terephthalate films, etc.), olefin resin films (polyethylene films, polypropylene films, etc.), polyvinyl chloride films, polyimide films, polyamide films (nylon films), rayon films. In addition to plastic base film (synthetic resin film) such as paper, paper (quality paper, Japanese paper, kraft paper, glassine paper, synthetic paper, top coat paper, etc.), these can also be laminated and co-extruded. Examples include layered materials (2 to 3 layer composites).

  On the other hand, the release treatment agent constituting the release treatment layer is not particularly limited, and for example, a silicone release treatment agent, a fluorine release treatment agent, a long-chain alkyl release treatment agent, or the like can be used. The release treatment agents can be used alone or in combination of two or more.

  As the release treatment agent, a silicone release treatment agent is suitable from the viewpoint of releasability and cost. The silicone release treatment agent can be appropriately selected from known polysiloxane release treatment agents (silicone release treatment agents) having a polysiloxane polymer as a main component. As the silicone release treatment agent, among them, an addition reaction type polysiloxane release treatment agent can be suitably used. The addition reaction type polysiloxane-based release treatment agent can be cured by addition reaction type crosslinking (curing reaction) to form a peelable film, and can exhibit useful release characteristics.

  The addition reaction type polysiloxane-based release treatment agent has two groups (sometimes referred to as “Si—H bond reactive groups”) having reactivity with a group having an Si—H bond in the molecule. The polysiloxane polymer having the above, and the polysiloxane polymer having two or more hydrogen atoms bonded to the silicon atom in the molecule (particularly, the silicon atom having a Si—H bond in the molecule). A polysiloxane release treatment composition containing 2 or more polysiloxane polymers) can be used. The “Si—H bond” means “a bond between a silicon atom (Si) and a hydrogen atom (H)”.

In a polysiloxane polymer having two or more Si-H bond reactive groups, a group containing a carbon-carbon unsaturated bond (such as an alkenyl group) is used as the Si-H bond reactive group. Can do. Examples of the alkenyl group include a vinyl group, an allyl group, a butenyl group, a pentenyl group, and a hexenyl group (preferably a vinyl group, a propenyl group, and particularly a vinyl group). The Si-H bond reactive group is usually bonded to a silicon atom (for example, a terminal silicon atom or a silicon atom inside the main chain) of a polysiloxane polymer forming a main chain or a skeleton. In this case, for example, by using “HOSi (R ¹ ) (R ² ) OH” (R ¹ is a Si—H bond reactive group, R ² is a hydrogen atom or a hydrocarbon group) as a monomer component, A -H bond reactive group is introduced into the molecule.

  In addition, in the polysiloxane polymer having two or more Si—H bond reactive groups, examples of the polysiloxane polymer forming the main chain or skeleton include polydimethylsiloxane polymer and polydiethylsiloxane. Polymers, polyalkylalkylsiloxane polymers such as polymethylethylsiloxane polymers, polyalkylarylsiloxane polymers, and copolymers containing a plurality of silicon atom-containing monomer components [for example, poly (dimethylsiloxane) -Diethylsiloxane) etc.] and the like, and polydimethylsiloxane polymers are preferred.

  On the other hand, in a polysiloxane polymer having two or more silicon atoms having Si-H bonds in the molecule, the silicon atoms having Si-H bonds include silicon atoms in the main chain and silicon in the side chain. Any of the atoms may be included, that is, it may be included as a constituent unit of the main chain, or may be included as a constituent unit of the side chain. Note that the number of Si-H bond silicon atoms (silicon atoms to which hydrogen atoms are bonded) is not particularly limited as long as it is two or more.

As a polysiloxane polymer having two or more silicon atoms having Si—H bonds in the molecule, “—Si (R ³ ) (H) O—” (R ³ is carbonized as a monomer unit in the molecule). A polysiloxane polymer having at least two hydrogen groups) is preferable, and a polydimethylhydrogensiloxane polymer [for example, poly (dimethylsiloxane-methylsiloxane) and the like] is particularly preferable.

  In the polysiloxane release treatment agent, a polysiloxane polymer having two or more silicon atoms having Si—H bonds in the molecule has a function as a crosslinking agent.

  The amount of the polysiloxane polymer having two or more Si-H bonded silicon atoms in the molecule is not particularly limited. For example, the polysiloxane polymer having two or more Si-H bonded silicon atoms in the molecule is used. Si—H bond reaction in a polysiloxane polymer having two or more Si—H bond reactive groups and the number of moles of silicon atoms in the Si—H bond in the polymer (sometimes referred to as “number of moles (X)”) The number of moles of the sex group (sometimes referred to as “number of moles (Y)”) is preferably a ratio of mole number (X)> number of moles (Y), but the number of moles (X) / number of moles (Y ) May be selected from a range of a ratio of about 0.8 to 2.0 (preferably 1.0 to 1.8).

  A polysiloxane polymer having two or more Si-H bond reactive groups in the molecule and a polysiloxane polymer having two or more silicon atoms having a Si-H bond in the molecule (crosslinking agent) ), A catalyst can be used. As the catalyst, a platinum-based catalyst (for example, a platinum-based compound such as platinum fine particles, chloroplatinic acid or a derivative thereof) can be preferably used. The amount of the catalyst used is not particularly limited. For example, 0.5 to 10 parts by weight with respect to 100 parts by weight (solid content) of a polysiloxane polymer having two or more Si—H bond reactive groups in the molecule. It can be selected from the range (preferably 1 to 7 parts by weight).

In the present invention, the polysiloxane release treatment agent includes a polydimethylsiloxane polymer having two or more Si-H bond reactive groups (especially vinyl groups) in the molecule, and a monomer unit in the molecule. It is preferable to use a polydimethylsiloxane release agent based on a polydimethylhydrogensiloxane polymer having two or more “—Si (R ³ ) (H) O—” (R ³ is a hydrocarbon group). it can.

  The polysiloxane release treatment agent includes the above-described constituent components (for example, a polydimethylsiloxane polymer having two or more Si-H bond reactive groups in the molecule, a silicon atom having an Si-H bond in the molecule). It is possible to prepare a polysiloxane polymer having two or more, and a catalyst and various additives as necessary) by mixing them with an organic solvent as necessary. The polysiloxane release treatment agent can be used in a state where a polymer component such as a polysiloxane polymer is dissolved in an organic solvent. The polysiloxane release treatment agent contains known or conventional additives (for example, fillers, antistatic agents, antioxidants, ultraviolet absorbers, plasticizers, colorants (dyes, pigments, etc.)). May be.

  Examples of such a polysiloxane release treatment agent include a trade name “TPR6600” (manufactured by GE Toshiba Silicone), a trade name “KS-778” (manufactured by Shin-Etsu Chemical Co., Ltd.), and a trade name “KS-837” (Shin-Etsu). Chemical Co., Ltd.) are commercially available.

  The release treatment layer can be formed by applying a release treatment agent to a predetermined surface (at least one surface) of the release liner substrate and then performing a heating process for drying, curing reaction, or the like. In the heating step for drying, curing reaction, etc., a known or conventional heating method (for example, a method using a hot air dryer) can be used. The addition reaction type polysiloxane release treatment agent is applied to a predetermined surface of a release liner substrate, and then subjected to an addition reaction type curing reaction in a drying process or a curing reaction process to form a release film. By forming, excellent peeling characteristics can be exhibited.

Moreover, it is important to apply the release treatment agent in an appropriate application amount. If the coating amount of the release treatment agent is too small, the peeling force (force required for peeling) becomes large and causes a practical problem. On the other hand, if it is too much, the cost becomes high and it is economically disadvantageous. The appropriate coating amount (solid content) of the release treatment agent can be appropriately selected depending on the type of pressure-sensitive adhesive to be used, and is, for example, about 0.01 to 0.5 g / m ² .

  The thickness of the release liner, the thickness of the release liner substrate, the thickness of the release treatment layer, and the like are not particularly limited, and can be appropriately selected according to the shape of the fiber convex structure.

  In particular, when the release liner is used to protect the surface of the pressure-sensitive adhesive layer on the side where the fibers of the fiber convex structure portion protrude outside, the release liner has a fiber protruding from the surface of the pressure-sensitive adhesive layer. Therefore, it is preferable to use a release liner having a recess (hole or depression) in a part corresponding to the part or part where the fiber on the surface of the pressure-sensitive adhesive layer protrudes. Among them, a release liner having a hole (particularly, a perforated part) at a site corresponding to the concave part of the pressure-sensitive adhesive layer as shown in FIG. 1 is preferable. As a release liner having such a hole, in order to protect the fibers of the fiber convex structure portion from falling down, at least the thickness of the outer peripheral region of the hole (particularly the perforated portion) is such that the fiber convex structure portion It is preferable that the height of the fiber is equal to or higher than the height at which the fiber protrudes from the surface of the pressure-sensitive adhesive layer.

  As a method for forming a concave portion (particularly a perforated portion) of a release liner, for example, a well-known or conventional concave portion forming machine [among others, a convex structure (protruded structure) of various shapes and a relative to the convex structure. A method using a perforation forming machine having a concave structure], a method using heat or light (for example, a method using a thermal head, a halogen lamp, a xenon lamp, a flash lamp, a laser beam, etc.), a mold (particularly having a convex portion). And a method by molding using a mold).

(Adhesive tape or sheet)
As the pressure-sensitive adhesive tape or sheet, (1) the pressure-sensitive adhesive layer is formed on both surfaces of the base material as a support, and a concave portion is partially formed in the pressure-sensitive adhesive layer on at least one surface of the base material, And a double-sided pressure-sensitive adhesive tape or sheet with a base material, which has a fiber convex structure part in which fibers protrude from the surface of the pressure-sensitive adhesive layer to the outside of the surface of the pressure-sensitive adhesive layer, (2) pressure-sensitive adhesive The layer is formed on one side of the base material as a support, the concave portion is partially formed in the pressure-sensitive adhesive layer, and the fibers protrude from the wall surface of the concave portion to the outside of the surface of the pressure-sensitive adhesive layer. Type adhesive tape or sheet (single-sided adhesive tape or sheet) with a base material having a fiber convex structure part of the structure, (3) a recess is partially formed in the adhesive layer, and Fibers that protrude from the surface of the pressure-sensitive adhesive layer to the outside of the wall It has a Jo structure, also double-sided pressure-sensitive adhesive tape or sheet of base material-less type double-sided pressure-sensitive adhesive layer is protected by one or two release liners may be exemplified.

  Thus, the pressure-sensitive adhesive tape or sheet may have the form of a pressure-sensitive adhesive tape or sheet in which only one surface is a pressure-sensitive adhesive surface, and has the form of a pressure-sensitive adhesive tape or sheet in which both surfaces are pressure-sensitive adhesive surfaces. It may be. In the case of a double-sided pressure-sensitive adhesive tape or sheet, as described above, a fiber convex structure portion in which fibers protrude from the outer side may be formed only on one side of the pressure-sensitive adhesive surface. The fiber convex structure part which the fiber protrudes may be formed.

  The pressure-sensitive adhesive tape or sheet may be a pressure-sensitive adhesive tape (rolled body or wound body) wound in a roll shape, or may be a pressure-sensitive adhesive sheet in the form of a single layer or laminated sheets.

  As described above, the pressure-sensitive adhesive tape or sheet is provided on the surface of the pressure-sensitive adhesive layer on at least one side of the support, from the wall surface of the recess partially formed on the pressure-sensitive adhesive layer, to the outside of the surface of the pressure-sensitive adhesive layer. Since the fiber protrudes, the adhesive layer surface (adhesive surface) on the surface where the fiber protrudes is bonded to the adherend with a small load. Adhesion can be performed, and after reapplying or correcting the affixing position, it can be firmly adhered by applying a large load. The size of the load applied during temporary bonding is not particularly limited, the height at which the fibers of the fiber convex structure part protrude from the surface of the pressure-sensitive adhesive layer, the thickness of the fiber of the fiber convex structure part, and the material It can be controlled by the type of the. That is, the adhesive force immediately after the adhesive tape or sheet is attached can be controlled to a desired size by the fiber convex structure.

  The pressure-sensitive adhesive tape or sheet of the present invention forms a fiber convex structure portion on the wall surface of the concave portion (side surface on the concave portion side of the pressure-sensitive adhesive layer) formed at a predetermined site in the pressure-sensitive adhesive layer on at least one surface of the support. Can be manufactured. Specifically, using the flocking method, the wall surface of the concave portion of the pressure-sensitive adhesive layer is subjected to flocking on the wall surface of the concave portion partially formed on the pressure-sensitive adhesive layer on at least one surface of the support. In addition, by forming a fiber convex structure having a structure in which fibers protrude outward from the surface of the pressure-sensitive adhesive layer, fibers from the wall surface of the concave portion of the pressure-sensitive adhesive layer to the outer side of the surface of the pressure-sensitive adhesive layer. A pressure-sensitive adhesive tape or sheet having a protruding fiber structure can be produced. As such a flocking method, an electrostatic flocking method is particularly suitable.

  As an electrostatic flocking method, for example, a flocked object having an adhesive layer is set to be a counter electrode with respect to one electrode, a DC high voltage is applied to this, and a gap between the electrodes is applied. Processing to perform flocking by supplying flocks (short fibers) and causing the flocks to fly along the lines of electric force by Coulomb force and hitting the surface of the object to be transplanted (the wall surface of the concave portion of the adhesive layer) The method etc. are mentioned. Such an electrostatic flocking method is not particularly limited as long as it is a known electrostatic flocking method. For example, in “Fiber” Vol. 34, No. 6 (1982-6) Any of the up method, the down method, and the side method as described in "."

  When the fiber convex structure is formed on the wall surface of the concave portion of the pressure-sensitive adhesive layer by a flocking method (particularly, electrostatic flocking method), as described above, at least one surface is a release surface and a hole is formed. It is preferable to use a release substrate having a portion (sometimes referred to as a “release substrate having a hole”). When the peeling base material which has a hole part is used, a fiber convex-shaped structure part can be efficiently and easily formed in the wall surface of the recessed part of an adhesive layer. Specifically, in a state where a release liner having a hole in a portion corresponding to the concave portion of the pressure-sensitive adhesive layer is superimposed on the surface of the pressure-sensitive adhesive layer, flocking processing is performed on the wall surface of the concave portion of the pressure-sensitive adhesive layer (particularly, By carrying out (electrostatic flocking process), a fiber convex structure part can be formed in the wall surface of the recessed part of the adhesive layer corresponding to the hole of a peeling base material.

  In addition, as a peeling base material which has a hole part, the above-mentioned release liner which has a hole part (especially perforation part) can be used, Especially the hole whose base material for release liners is a plastic-type base material. A release film having a portion (particularly a perforated portion) is suitable.

  When the pressure-sensitive adhesive layer is already protected by a release liner that does not have holes, after peeling off the release liner, a release substrate having holes is bonded to the surface of the pressure-sensitive adhesive layer, and flocking is performed. Can be applied.

  The release substrate having the hole may be peeled after the fiber convex structure is formed, but is preferably used as it is as a release liner. That is, as a method for producing a pressure-sensitive adhesive tape or sheet having a fiber convex structure portion on the wall surface of the concave portion of the pressure-sensitive adhesive layer, for example, a concave portion of the pressure-sensitive adhesive layer is formed with a release liner having a hole (particularly a perforated portion). A method in which flocking is performed on the wall surface of the concave portion of the pressure-sensitive adhesive layer in a state where the surface is superimposed on the surface on the side of the adhesive layer is preferable.

  In addition, when the peeling base material which has a hole part is peeled and removed after forming a fiber convex structure part, the surface which the fiber of the fiber convex structure part in an adhesive layer protrudes has a recessed part. It can be protected by a liner (particularly, a release liner having a concave portion at a portion or a portion where the fiber of the fiber convex structure portion of the pressure-sensitive adhesive layer protrudes).

  In the pressure-sensitive adhesive tape or sheet of the present invention, since the fibers of the fiber convex structure part partially protrude from the surface of the pressure-sensitive adhesive layer, a small load is applied after overlapping the adherend as described above. Temporary bonding can be performed, and after temporary bonding, re-bonding and correction of the bonding position can be performed sufficiently and easily. That is, the pressure-sensitive adhesive tape or sheet of the present invention is excellent in reworkability and adhesion position correction workability when adhering adherends.

  In the present invention, the size (area occupied by one recess) and shape of each recess partially formed in the adhesive layer, the ratio of all recesses formed in the adhesive layer to the entire adhesive surface (all recesses) The ratio of the area occupied by the fiber), the fiber shape (length, thickness, etc.) and the material of the fiber convex structure part, and the adhesive force (initial adhesive force) immediately after application of the adhesive tape or sheet, and strong after application It is possible to control the adhesive strength (adhesive strength after pasting and storage) to be adhered to a desired size.

  Therefore, the pressure-sensitive adhesive tape or sheet of the present invention can be suitably used as a pressure-sensitive adhesive tape or sheet for applications that require re-bonding or correction of the attachment position after temporary bonding. It is useful as an adhesive tape or sheet (adhesive tape or sheet for attaching a flooring material) used for bonding to a floor. In addition, when using it as an adhesive tape or sheet for flooring material sticking, as an adhesive tape or sheet, both surfaces are adhesive surfaces, and the fiber of the fiber convex structure part has protruded partially on one adhesive surface. Double-sided pressure-sensitive adhesive tape or sheet having a configuration (a double-sided pressure-sensitive adhesive tape or sheet of a baseless type or with a base material) [that is, one of the double-sided pressure-sensitive adhesive surfaces is partially a fiber of a convex structure Is a pressure-sensitive adhesive surface (fiber convex structure forming pressure-sensitive adhesive surface), and the other pressure-sensitive adhesive surface is a pressure-sensitive adhesive surface (fiber convex structure non-forming pressure-sensitive adhesive surface) on which the fibers do not protrude. The double-sided pressure-sensitive adhesive tape or sheet] can be suitably used.

The method of bonding the flooring material to the floor using the pressure-sensitive adhesive tape or sheet of the present invention is not particularly limited as long as it is a method of bonding the flooring material to the floor via the pressure-sensitive adhesive tape or sheet. A suitable laminating method is suitable.
[Method of bonding flooring material to the floor]
As the pressure-sensitive adhesive tape or sheet, for example, a double-sided pressure-sensitive adhesive tape or sheet in which one surface is a fiber convex structure-forming pressure-sensitive adhesive surface and the other surface is a fiber convex structure-non-formed pressure-sensitive adhesive surface (baseless type or sheet) Using a double-sided pressure-sensitive adhesive tape or sheet with a base material), after sticking the adhesive surface of the adhesive tape or sheet on the fiber convex structure non-formed adhesive surface side to the flooring material, insert the flooring material into a predetermined place Then, the adhesive surface on the fiber convex structure forming adhesive surface side is pasted to the floor and temporarily adhered, and further, the flooring material is moved to a predetermined location along the floor, and then the adhesive tape or sheet is bonded by strong pressure bonding. The flooring material is firmly attached to the floor.

  When the pressure-sensitive adhesive tape or sheet is a pressure-sensitive adhesive tape or sheet having only one surface that is a pressure-sensitive adhesive surface, the one-sided pressure-sensitive adhesive surface is a fiber convex structure-forming pressure-sensitive adhesive surface, and the substrate-side surface is bonded. After bonding the flooring material to the floor with the adhesive, etc., the flooring material is inserted into a predetermined place, the adhesive surface on the fiber convex structure forming adhesive surface side is pasted to the floor and temporarily bonded, and the flooring material is then attached to the floor. Then, the flooring material can be firmly bonded to the floor via an adhesive tape or sheet by strong pressure bonding.

  Hereinafter, the present invention will be described in more detail based on examples, but the present invention is not limited to these examples.

(Example 1)
1% by weight heptane of a polydimethylsiloxane-based silicone release treatment agent (trade name “KS-778” (Shin-Etsu Chemical Co., Ltd.)) on one side of a polyester film (trade name “Lumirror # 38” manufactured by Toray Industries, Inc .; thickness 38 μm) After the solution was applied, it was dried at 120 ° C. for 2 minutes to produce a release liner (release paper; sometimes referred to as “release liner A1”). The coating amount of the treatment agent was 0.05 g / m ² .

  An acrylic pressure-sensitive adhesive (an acrylic pressure-sensitive adhesive in which the base polymer is a butyl acrylate-acrylic acid copolymer) is applied on the release-treated surface of the release liner A1 so that the thickness after drying is 30 μm. Then, a pressure-sensitive adhesive layer (sometimes referred to as “pressure-sensitive adhesive layer A”) is formed, and on the surface of the pressure-sensitive adhesive layer A, a release liner (release paper; “release” having the same configuration as the release liner A1 is formed. Liner A2 ”) may be superposed such that the release surface is in contact with the surface of the pressure-sensitive adhesive layer A to obtain a pressure-sensitive adhesive sheet (sometimes referred to as“ pressure-sensitive adhesive sheet A ”). That is, the pressure-sensitive adhesive sheet A has a layer configuration of “release liner A1 / pressure-sensitive adhesive layer A / release liner A2”.

  Further, the pressure-sensitive adhesive sheet A is cut by half-cutting using a die having a 1 mmφ (diameter: 1 mm) -shaped punching blade at an interval of 10 mm (a punching process is performed on the release liner A2 and the pressure-sensitive adhesive layer A). ) To obtain an adhesive sheet A having a structure as shown in FIG. That is, the punched pressure-sensitive adhesive sheet A has a layer configuration of “release liner A1 / adhesive layer A partially formed with perforated portions / release liner A2 partially formed with perforated portions”. is doing.

  FIG. 4 is a schematic cross-sectional view showing an adhesive sheet that has been punched by half-cut. In FIG. 4, 11 is a pressure-sensitive adhesive sheet that has been cut by half-cut, 21 is a pressure-sensitive adhesive layer having a perforated part, 21a is a perforated part of the pressure-sensitive adhesive layer 21, and 21a1 is a perforated part of the pressure-sensitive adhesive layer 21. The wall surface of 21a, 31 is a release liner having no perforated part, 41 is a release liner having a perforated part, and 41a is a perforated part of the release liner 41. The release liner A1 is partially formed on the release liner 31 that does not have a perforated part, and the adhesive layer A partially formed with the perforated part is partially formed on the adhesive layer 21 that has the perforated part 21a. The release liner A2 in which the perforated part is formed corresponds to the release liner 41 having the perforated part 41a.

  Using the polyamide fiber (fiber thickness 3 denier, fiber length 0.5 mm) on the punched adhesive sheet A, electrostatic flocking is performed from the release liner A2 side where the perforated part is formed. The fiber raised portion (“fiber raised portion A”) is applied to the wall surface of the perforated portion of the pressure sensitive adhesive layer as shown in FIG. 1 by flocking the polyamide fiber on the wall surface of the perforated portion of the pressure sensitive adhesive layer A. A double-sided pressure-sensitive adhesive sheet (sometimes referred to as “fiber convex structure-forming pressure-sensitive adhesive sheet A”). That is, the fiber convex structure-forming pressure-sensitive adhesive sheet A is a layer of “release liner A1 / adhesive layer A having a fiber raised portion A on the wall surface of a partially formed perforated portion / release liner A2 having a perforated portion”. It has a configuration. The fiber that protrudes most from the surface of the pressure-sensitive adhesive layer A protrudes from the surface of the pressure-sensitive adhesive layer A by about 0.5 mm. That is, the distance between the tip of the fiber most protruding from the surface of the pressure-sensitive adhesive layer A as the fiber of the fiber raising portion A and the surface of the pressure-sensitive adhesive layer A was about 0.5 mm.

(Example 2)
After coating a 1% by weight heptane solution of a polydimethylsiloxane-based silicone release treatment agent (trade name “TPR6600” manufactured by GE Toshiba Silicone) on a kraft paper laminated with polyethylene, the coating is performed at 120 ° C. for 2 minutes. Drying was performed to prepare a release liner (release paper; sometimes referred to as “release liner B1”). In this release liner B1, the coating amount of the silicone release treatment agent was 0.05 g / m ² .

  A rubber-based adhesive (natural rubber and styrene-butadiene rubber are blended in a ratio of natural rubber / styrene-butadiene rubber = 50/50 (weight ratio) on the release-treated surface of the release liner B1. The pressure-sensitive adhesive is coated so that the thickness after drying is 30 μm to form a pressure-sensitive adhesive layer (sometimes referred to as “pressure-sensitive adhesive layer B”), and further on the surface of the pressure-sensitive adhesive layer B. The release liner having the same configuration as the release liner B1 (release paper; sometimes referred to as “release liner B2”) is superposed so that the release-treated surface is in contact with the surface of the adhesive layer B, thereby A sheet (sometimes referred to as “adhesive sheet B”) was obtained. That is, the adhesive sheet B has a layer configuration of “release liner B1 / adhesive layer B / release liner B2”.

  Further, the pressure-sensitive adhesive sheet B was cut by half-cutting with a mold having a 1.5 mmφ (diameter: 1.5 mm) punching blade at intervals of 5 mm (release liner B2, adhesive layer B, and In the same manner as in Example 1, a pressure-sensitive adhesive sheet B having a structure as shown in FIG. 4 was obtained. That is, the punched pressure-sensitive adhesive sheet B has a layer configuration of “release liner B1 / adhesive layer B with partially perforated portions / release liner B2 with partially perforated portions”. is doing.

  The punched pressure-sensitive adhesive sheet B is subjected to electrostatic flocking from the release liner B2 side where the perforated part is formed using rayon fibers (fiber thickness 3 denier, fiber length 1 mm). By planting the rayon fiber on the wall surface of the perforated portion of the agent layer B, the fiber raised portion (in some cases referred to as “fiber raised portion B”) is formed on the wall surface of the perforated portion of the adhesive layer as shown in FIG. A double-sided pressure-sensitive adhesive sheet (sometimes referred to as “fiber convex structure-forming pressure-sensitive adhesive sheet B”). That is, the fiber convex structure-forming pressure-sensitive adhesive sheet B is a layer of “release liner B1 / pressure-sensitive adhesive layer B having a fiber raised portion B on the wall surface of a partially formed perforated portion / release liner B2 having a perforated portion”. It has a configuration. The fiber that protrudes most from the surface of the pressure-sensitive adhesive layer B protrudes from the surface of the pressure-sensitive adhesive layer B by about 1 mm. That is, the distance between the tip of the fiber most protruding from the surface of the pressure-sensitive adhesive layer B and the surface of the pressure-sensitive adhesive layer B as the fibers of the fiber raised portion B was about 1 mm.

(Example 3)
A 1% by weight heptane solution of a polydimethylsiloxane-based silicone release agent (trade name “KS-837” (manufactured by Shin-Etsu Chemical Co., Ltd.)) on one side of a polyethylene film (trade name “NSO” manufactured by Okura Kogyo Co., Ltd .; thickness 60 μm) After being coated, the film was dried at 120 ° C. for 2 minutes to produce a release liner (release paper; sometimes referred to as “release liner C1”). The coating amount of the agent was 0.04 g / m ² .

  An acrylic pressure-sensitive adhesive (an acrylic pressure-sensitive adhesive whose base polymer is a butyl acrylate-acrylic acid copolymer) is applied on the release treatment surface of the release liner C1 so that the thickness after drying is 30 μm. Then, a pressure-sensitive adhesive layer (sometimes referred to as “pressure-sensitive adhesive layer C”) is formed, and on the surface of the pressure-sensitive adhesive layer C, a release liner (release paper; “release” having the same configuration as the release liner C1 is formed. Liner C2 ”) may be overlapped so that the release surface is in contact with the surface of the pressure-sensitive adhesive layer C to obtain a pressure-sensitive adhesive sheet (sometimes referred to as“ pressure-sensitive adhesive sheet C ”). That is, the pressure-sensitive adhesive sheet C has a layer configuration of “release liner C1 / adhesive layer C / release liner C2”.

  Furthermore, the pressure-sensitive adhesive sheet C is cut by half-cutting using a die having a 1 mmφ (diameter is 1 mm) shape at intervals of 20 mm (a punching process is performed on the release liner C2 and the pressure-sensitive adhesive layer C). In the same manner as in Example 1, an adhesive sheet C having a structure as shown in FIG. 4 was obtained. That is, the punched pressure-sensitive adhesive sheet C has a layer structure of “release liner C1 / adhesive layer C partially formed with perforated portions / release liner C2 partially formed with perforated portions”. is doing.

  Using the polyamide fiber (fiber thickness 3 denier, fiber length 1.2 mm) on the punched pressure-sensitive adhesive sheet C, electrostatic flocking is performed from the release liner C2 side where the perforated part is formed. The fiber raised portion ("fiber raised portion C") is applied to the wall surface of the perforated portion of the adhesive layer as shown in FIG. A double-sided pressure-sensitive adhesive sheet (sometimes referred to as “fiber convex structure-forming pressure-sensitive adhesive sheet C”). That is, the fiber convex structure-forming pressure-sensitive adhesive sheet C is a layer of “release liner C1 / adhesive layer C having a fiber raised portion C on the wall surface of a partially formed perforated portion / release liner C2 having a perforated portion”. It has a configuration. The fiber that protrudes most from the surface of the pressure-sensitive adhesive layer C protrudes from the surface of the pressure-sensitive adhesive layer C by about 1.2 mm. That is, the distance between the tip of the fiber most protruding from the surface of the pressure-sensitive adhesive layer C and the surface of the pressure-sensitive adhesive layer C as the fibers of the fiber raised portion C was about 1.2 mm.

(Comparative Example 1)
A pressure-sensitive adhesive sheet produced in the same manner as the pressure-sensitive adhesive sheet A (sometimes referred to as “double-sided pressure-sensitive adhesive sheet D”) was used.

(Evaluation)
In Examples 1 to 3, the pressure-sensitive adhesive sheets (fiber convex structure-forming pressure-sensitive adhesive sheets A to C and double-sided pressure-sensitive adhesive sheets D) obtained by Examples and Comparative Examples are the sides where the fiber tips of the fiber raised portions protrude from the surface. The pressure-sensitive adhesive layer surface (adhesive surface) of Comparative Example 1, the pressure-sensitive adhesive layer surface (adhesive surface) on the release liner side, which was laminated later, was loaded on the acrylic plate from the release liner side at a load of 25 g / 22.5 cm ² . Then, the adhesive sheet was moved 6 mm from the position where the pressure-sensitive adhesive sheet was pasted, and then strongly pressure-bonded, and the workability of correcting the pasting position was evaluated depending on whether or not the movement at this time was easy.

  In addition, after being pasted, it was allowed to stand at room temperature (23 ° C.) for 24 hours, and then a polyester film (trade name “Lumirror # 38” manufactured by Toray Industries, Inc .; thickness: 38 μm) was lined on each pressure-sensitive adhesive sheet. Was used to measure the adhesive strength to the acrylic plate, and the adhesive strength of the pressure-sensitive adhesive layer having the fiber raised portion on the surface was evaluated based on the ratio of the double-sided pressure-sensitive adhesive sheet D of Comparative Example 1 to the adhesive strength.

  These evaluation results are shown in the columns of “Attachment position correction workability” and “Adhesive strength recovery rate (%)” in Table 1, respectively.

  As is clear from Table 1, the pressure-sensitive adhesive sheet according to the example (the pressure-sensitive adhesive sheet in which the fibers of the fiber raised portion protrude from the surface of the pressure-sensitive adhesive layer) is easy to correct the position after the initial application, and is strongly applied. After that, it was confirmed that the adhesive strength was good.

It is the schematic which shows partially an example of the adhesive tape or sheet | seat of this invention, (a) is the schematic plan view seen from the upper surface of the adhesive tape or sheet, (b) is the outline of the XY line in (a). It is sectional drawing. It is a figure which shows the photograph regarding the shape of the fiber raising part currently formed in the recessed part wall surface of an adhesive layer, and is the figure seen from the upper surface of the adhesive layer. It is a figure which shows the photograph regarding the shape of the fiber raising part currently formed in the recessed part wall surface of an adhesive layer, and is a figure which shows the principal part of the fiber raising part which concerns on FIG. It is a schematic sectional drawing which shows the adhesive sheet in which the punching process by a half cut was given.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Adhesive tape or sheet 2 Adhesive layer 2a Recessed part of adhesive layer 2 2a1 Wall surface of recessed part 2a of adhesive layer 2b Surface of adhesive layer 2 3 Adhesive tape or sheet release liner 4 Release liner having perforated part 4a Release Hole part of liner 4 5 Fiber raising part

Claims (7)

A pressure-sensitive adhesive tape or sheet having a pressure-sensitive adhesive layer formed on at least one surface of a support, wherein the pressure-sensitive adhesive layer on at least one surface of the support is partially formed with a recess, and A pressure-sensitive adhesive tape or sheet, characterized in that a fiber convex structure having a structure in which fibers protrude from the surface of the pressure-sensitive adhesive layer to the outer side is formed on the wall surface. The structure in which the fiber protrudes from the wall surface of the recess partly formed on the pressure-sensitive adhesive layer on at least one surface of the support so that the fiber rises outward from the surface of the pressure-sensitive adhesive layer. The pressure-sensitive adhesive tape or sheet according to claim 1, which is a fiber raising portion. The pressure-sensitive adhesive tape or sheet according to claim 2, wherein the concave portion of the pressure-sensitive adhesive layer is a hole. The support is a pressure-sensitive adhesive tape or sheet release liner, and a pressure-sensitive adhesive layer is formed on one side of the pressure-sensitive adhesive tape or sheet release liner. The pressure-sensitive adhesive tape or sheet according to any one of claims 1 to 3, wherein a fiber convex structure having a structure in which fibers protrude from the outside is formed. It is an adhesive tape or sheet for flooring material sticking, The adhesive tape or sheet in any one of Claims 1-4. A method for producing the pressure-sensitive adhesive tape or sheet according to claim 1, wherein the pressure-sensitive adhesive layer is partially formed on the pressure-sensitive adhesive layer on at least one surface of the support using a flocking method. By forming a flocking process on the wall surface of the concave portion, a fiber convex structure portion having a structure in which fibers protrude from the surface of the pressure-sensitive adhesive layer to the outer side is formed on the wall surface of the concave portion of the pressure-sensitive adhesive layer. A method for producing an adhesive tape or sheet. The pressure-sensitive adhesive according to claim 6, wherein a flocking process is performed on the wall surface of the concave portion of the pressure-sensitive adhesive layer in a state where a release liner having a hole at a portion corresponding to the concave portion of the pressure-sensitive adhesive layer is superimposed on the surface of the pressure-sensitive adhesive layer. Tape or sheet manufacturing method.

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