Adhesive body with separator

Abstract

To provide an adhesive body with a separator that suppresses or prevents a linear adhesive body from being crushed or falling off.SOLUTION: An adhesive body with a separator comprises a linear adhesive body and a separator, in which the compressive elastic modulus of the separator is 1.5 MPa or less.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an adhesive article with a separator. [Background technology]

[0002] BACKGROUND ART Linear adhesive bodies have been known in the past. For example, Patent Document 1 discloses a thread-like adhesive device characterized by having an adhesive attached to a thread-like core material. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 03-231980 Summary of the Invention [Problem to be solved by the invention]

[0004] Such adhesive bodies are linear and therefore can be easily applied to narrow spaces, etc. Furthermore, unlike liquid adhesives, there is no risk of dripping or spilling.

[0005] Here, in adhesive bodies, measures are usually taken to protect the adhesive surfaces during storage to prevent the adhesive surfaces from sticking together or from losing their adhesive strength due to the adhesion of dust or the like to the adhesive surfaces. For example, a typical single-sided adhesive tape is protected by being wound so that the adhesive surface and the non-adhesive surface (back surface) are stuck together, or by having a separator attached to the adhesive surface. Also, in double-sided adhesive tapes, the adhesive surfaces are protected by being wound with a separator sandwiched between the adhesive surfaces to prevent them from coming into contact with each other, or by having separators attached to both adhesive surfaces.

[0006] However, in the case of linear adhesive bodies, methods for protecting the adhesive surface during storage have not been fully investigated. Patent Document 1 describes a method of storing thread-like adhesives on a reel without using a separator, by winding the thread-like adhesives on the reel so that the areas where they are in close contact with each other are reduced. However, this type of method is only applicable to adhesive bodies with low adhesive strength, because it becomes difficult to peel the adhesive bodies apart when the adhesive strength of the thread-like adhesive is high.

[0007] In protecting the adhesive surface of a linear adhesive body, it is conceivable to protect the adhesive surface using a separator, as in the case of double-sided adhesive tape. That is, it is conceivable to protect the adhesive body by a method such as sandwiching the linear adhesive body using a separator such as that used in adhesive tape, or by sandwiching a separator between linear adhesive bodies and winding them. Such a method can also be applied to adhesive bodies with high adhesive strength. However, in this method, the adhesive body may be crushed by the pressure caused by the tight wrapping when clamping or winding, which may damage the shape of the adhesive body. Also, since the separator is flat and the adhesive body is linear, there is a risk that the adhesive body may roll on the separator and fall off.

[0008] The present invention has been completed in view of the above, and has an object to provide an adhesive body with a separator in which crushing and falling off of the linear adhesive body are suppressed or prevented. [Means for solving the problem]

[0009] One aspect of the present invention relates to a separator-attached adhesive body, which comprises a linear adhesive body and a separator, wherein the separator has a compressive modulus of elasticity of 1.5 MPa or less. In the above-mentioned separator-attached adhesive body, a slit may be formed in the separator, and at least a part of the adhesive body may be disposed in the slit. Another aspect of the present invention relates to an adhesive body with a separator, comprising a linear adhesive body and a separator, wherein a slit is formed in the separator, and at least a portion of the adhesive body is disposed within the slit. In the separator-attached adhesive body of each of the above aspects, the slit may be formed along the longitudinal direction of the separator. In the separator-attached adhesive body of each of the above-mentioned embodiments, the adhesive body is preferably thread-shaped. In the separator-attached adhesive body of each of the above-mentioned embodiments, the separator-attached adhesive body may be wound into a roll. [Effects of the Invention]

[0010] The separator-attached adhesive body of the present invention can suppress or prevent the linear adhesive body from being crushed or falling off. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1(a) is a schematic diagram of a separator-attached adhesive body according to one configuration example of the first embodiment of the present invention wound into a roll (roll-shaped separator-attached adhesive body), and FIG. 1(b) is a cross-sectional view of a cross section perpendicular to the winding direction of the separator-attached adhesive body according to the configuration example. [Figure 2] FIG. 2 is a perspective view showing a state in which a separator-attached adhesive body according to one configuration example of the first embodiment of the present invention is wound around a reel. [Figure 3] FIG. 3 shows a specific example of how to wind a separator-attached adhesive thread. [Figure 4] FIG. 4 is a diagram showing another specific example of how to wind a separator-attached adhesive thread. [Figure 5] (a) of Figure 5 is a cross-sectional view of a cross section perpendicular to the longitudinal direction of a separator in one configuration example of the second embodiment of the present invention, and (b) of Figure 5 is a cross-sectional view of a cross section perpendicular to the winding direction of a roll-shaped separator-attached adhesive body relating to this configuration example. [Figure 6](a) of Figure 6 is a cross-sectional view of a cross section perpendicular to the longitudinal direction of a separator-attached adhesive body in one configuration example of the second embodiment of the present invention, and (b) of Figure 6 is a cross-sectional view of a cross section perpendicular to the winding direction of a roll-shaped separator-attached adhesive body in this configuration example. [Figure 7] (a) of Figure 7 is a cross-sectional view of a cross section perpendicular to the longitudinal direction of a separator-attached adhesive body in one configuration example of the second embodiment of the present invention, and (b) of Figure 7 is a cross-sectional view of a cross section perpendicular to the winding direction of a roll-shaped separator-attached adhesive body relating to this configuration example. DETAILED DESCRIPTION OF THE INVENTION

[0012] The separator-attached adhesive body according to the first embodiment of the present invention comprises a linear adhesive body and a separator, and the separator has a compressive elastic modulus of 1.5 MPa or less. The separator-attached adhesive body according to the second embodiment of the present invention comprises a linear adhesive body and a separator, a slit is formed in the separator, and at least a part of the adhesive body is disposed in the slit.

[0013] These embodiments will be described in detail below. However, the present invention is not limited to the embodiments described below. Furthermore, in the following drawings, components and parts that perform the same function may be denoted by the same reference numerals, and duplicated explanations may be omitted or simplified. Furthermore, the embodiments shown in the drawings are schematic in order to clearly explain the present invention, and do not necessarily accurately represent the size or scale of the actual product. In addition, in this specification, the term "linear" is a concept that encompasses not only straight lines, curved lines, broken lines, etc., but also a state in which the material can be bent in various directions and angles like a thread (hereinafter also referred to as "thread-like").

[0014] [First embodiment] The separator-attached adhesive body according to the first embodiment of the present invention comprises a linear adhesive body and a separator, and the separator has a compressive modulus of elasticity of 1.5 MPa or less. The compressive modulus of the separator in this embodiment is preferably 1.2 MPa or less, and more preferably 1 MPa or less. While there is no particular lower limit to the compressive modulus of the separator in this embodiment, it is, for example, 0.001 MPa or more from the viewpoint of obtaining appropriate strength. The compressive modulus can be measured by the following method.

[0015] The compressive modulus of the separator can be measured by the following compression test using, for example, an autograph (a small tabletop tester EXtest manufactured by Shimadzu Corporation). In a room at 23°C, a separator (4 cm long x 4 cm wide) was placed on an acrylic stand, and a cylindrical indenter (SUS, indenter area: 100 mm 2 ) is pressed vertically against the center of the separator at a compression rate of 0.1 mm / min, while measuring the compressive stress, and the compressive modulus E (MPa) is calculated using the following formula. E(MPa)=(σ2-σ1) / (ε2-ε1) Compressive stress σ1: 0.005 (MPa) Compressive stress σ2: 0.01 (MPa) Compressive strain value ε1: Compressive strain value at compressive stress σ1 Compressive strain value ε2: Compressive strain value at compressive stress σ2

[0016] The separator in this embodiment has excellent cushioning properties because it has a compressive modulus of elasticity of 1.5 MPa or less. As a result, in the separator-attached adhesive body of this embodiment, the linear adhesive body is stably protected in a state where it is suppressed or prevented from being crushed or falling off. This will be explained in detail below.

[0017] FIG. 1(a) is a schematic diagram of a separator-attached adhesive body according to one example of the present embodiment wound into a roll (a roll-shaped separator-attached adhesive body). FIG. 1(b) is a cross-sectional view of a cross section perpendicular to the winding direction of the separator-attached adhesive body according to the example. The separator 12 in this example has a compressive modulus of 1.5 MPa or less and has excellent cushioning properties. Therefore, when the separator 12 is wound together with the linear adhesive body 11, it deforms according to the shape of the linear adhesive body 11, as shown in FIG. 1(b). This alleviates the stress that the linear adhesive body 11 receives from the separator 12, thereby suppressing or preventing the linear adhesive body 11 from being crushed, and maintaining the shape of the adhesive body. Furthermore, as shown in FIG. 1(b), in the separator-attached adhesive body 10 of this example, the linear adhesive body 11 is sandwiched between the separator 12 so as to be wrapped around it, making it less likely to roll and less likely to fall off the separator 12. In the example shown in (b) of Figure 1, there is a gap between the linear adhesive body 11 and the separator 12, but this embodiment is not limited to this, and there may be no gap between the linear adhesive body 11 and the separator 12.

[0018] While Fig. 1(a) shows an example in which the adhesive body 10 is wound so that the side where the linear adhesive body 11 is disposed faces inward, the adhesive body 10 may be wound so that the side where the linear adhesive body 11 is disposed faces outward. As shown in Fig. 2, the separator-attached adhesive body 10 of this embodiment may be wound around a reel 14 or the like. The separator-attached adhesive body 10 of this embodiment does not have to be wound; for example, the linear adhesive body 11 may be sandwiched between a plurality of separators 12.

[0019] As an example, the separator-attached adhesive body 10 is wound into a roll as follows. FIG. 3 is a diagram showing a specific example of how to wind the separator-attached adhesive body 10, in which the adhesive body is thread-shaped (thread-shaped adhesive body). As shown in FIG. 3, the thread-shaped adhesive body 11 is traverse-wound (cross-wound) over a predetermined width on the reel 14 as a guide G of the winding machine WM moves back and forth in the width direction of the reel 14 (paper tube, winding core). As shown in FIG. 3(a), when the thread-shaped adhesive body 11 reaches the right (or left) end in the width direction of the reel 14, the separator 12 is sandwiched between the thread-shaped adhesive body 11 and the separator 12. The separator 12 is a sheet having a size that is at least the predetermined width and at least the outer periphery of the reel 14. From the viewpoint of convenience, the upper limit of the length of the separator 12 is preferably about twice the outermost circumference when wound, i.e., the outermost circumference when the thread-shaped adhesive body 11 and the separator 12 are wound around the reel 14. As shown in (b) of Figure 3, when the guide G moves in the width direction, the thread-like adhesive body 11 is wound into a roll on the reel 14 via the separator 12. The sandwiching of the separator 12 shown in (a) of Figure 3 is preferably performed automatically.

[0020] To wind the separator-attached adhesive body, a winder WM2 shown in FIG. 4 may be used instead of the winder WM shown in FIG. 3. The winder WM2 is a winder WM to which a touch roll unit TR has been added. The touch roll unit TR is provided parallel to the reel 14 below a guide G that moves back and forth in the width direction of the reel 14, and presses the surface of the reel 14 (via the thread-like adhesive body 11 and the separator 12). When the thread-like adhesive body 11 reaches the right (or left) end of the reel 14 in the width direction, the separator 12 is inserted in the direction indicated by arrow I, and the separator 12 is positioned between the reel 14 and the touch roll unit TR, sandwiching the separator 12. When the guide G moves in the width direction in this state, the thread-like adhesive body 11 is wound into a roll on the reel 14 via the separator 12. During winding, the separator 12 is pressed against the reel 14 by the touch roll portion TR, so that the separator-attached adhesive body can be wound up without loosening.

[0021] Furthermore, in the separator-attached adhesive body of this embodiment, as in the second embodiment described later, it is preferable that a slit is formed in the separator and at least a part of the adhesive body is disposed in the slit. Fig. 5(a) shows a cross-sectional view perpendicular to the longitudinal direction of a separator 22 in which a slit 23 is formed, and Fig. 5(b) shows a cross-sectional view perpendicular to the winding direction of a roll (roll-shaped separator-attached adhesive body 20) in which a separator-attached adhesive body 20 including a separator 22 in which a slit 23 is formed is wound. In this configuration, at least a portion of the linear adhesive body 21 is disposed within the slit 23, so that the stress that the linear adhesive body 21 receives from the separator 22 when wound is further alleviated, making it even less likely to be crushed. In addition, since the linear adhesive body 21 is held within the slit 23, it is even less likely to roll. A preferred aspect of the slit 23 is the same as that described in the section on the second embodiment below.

[0022] The material of the separator in this embodiment is not particularly limited as long as it has the above-mentioned compressive elastic modulus, but the separator in this embodiment is preferably a separator mainly made of a porous material, as this makes it easier to obtain high cushioning properties. Here, "a separator mainly made of a porous material" means a separator made only of a porous material, or a laminate of a layer made of a porous material and another layer.

[0023] Examples of the porous material include the following (1) to (3). (1) Paper, woven fabric, nonwoven fabric (e.g., polyester (e.g., polyethylene terephthalate (PET)) nonwoven fabric, etc.). (2) A material obtained by mechanically perforating a solid film made of one or more resins selected from the group consisting of polyester (e.g., polyethylene terephthalate (PET)), nylon, Saran (trade name), polyvinyl chloride, polyethylene, polypropylene, ethylene-vinyl acetate copolymer, polytetrafluoroethylene, and ionomer. (3) Foam materials such as polyolefin foams (e.g., non-crosslinked polyethylene foams, crosslinked polyethylene foams, polypropylene foams, foams containing polyethylene (PE) and polypropylene (PP) as components, etc.), polyester foams (e.g., polyethylene terephthalate foams, etc.), urethane foams (e.g., flexible urethane foams, rigid urethane foams, urethane-modified polyisocyanurate foams, polyisocyanurate foams, etc.), or rubber-based foams. Among these, foam materials are preferred because of their good cushioning properties, and polyolefin foam materials are more preferred.

[0024] The porous material has an apparent density of 900 kg / m as measured in accordance with JIS K 7222 (2005). 3 It is preferable that the resistance is 200 kg / m or less. 3 If the porous material has such an apparent density, the separator 22 will have particularly excellent cushioning properties. On the other hand, from the viewpoint of strength, the apparent density of porous materials is 15 kg / m 3 More than 25kg / m is preferable. 3 The above is more preferable.

[0025] When the porous material is a foam material, the average major axis of the micropores is preferably in the range of 10 to 1000 μm, and the average minor axis is preferably in the range of 10 to 1000 μm. From the viewpoint of flexibility, the porosity of the foam material is preferably 50 to 99%, more preferably 60 to 98%. Here, the "porosity" refers to the area ratio of the micropores to the area of ​​the material in a plane perpendicular to the thickness direction of the foam material.

[0026] The separator may also have other layers in addition to the layer made of a porous material. Examples of other layers include a solid film made of metal or resin, a skin layer, and a release layer.

[0027] A solid metal or resin film is a non-porous metal or resin film that has not been mechanically perforated, and may be provided to suppress the elongation of the separator. Suppressing the elongation of the separator has advantages such as easier transport and easier uniform application of a release treatment agent. Note that even if a metal or resin film has micropores that inevitably occur during the manufacturing process of forming the metal or resin into a film, such a metal or resin film is included in the category of "solid film." Examples of solid resin films include films formed from one or more resins selected from the group consisting of polyesters (e.g., polyethylene terephthalate (PET), polyethylene naphthalate (PEN), etc.); polyamides (e.g., nylon, etc.); polyvinyl chloride (PVC); polyvinyl acetate (PVAc); polyvinylidene chloride; polyolefins (e.g., polyethylene (high-density polyethylene, low-density polyethylene), polypropylene, reactor TPO, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer (EVA), etc.); polyimides (PI); fluorine-based resins (e.g., polytetrafluoroethylene); cellophane; and ionomer resins (e.g., resins in which a polymer having polyethylene units (E) and acrylic acid units (A) is crosslinked with a metal (M)). Examples of solid metal films include aluminum foil, copper foil, and stainless steel foil.

[0028] The solid film is preferably a solid film made of a resin, more preferably a film formed from one or more resins selected from the group consisting of polyolefin, polyester, and polyimide, and even more preferably a film formed from one or more resins selected from the group consisting of polyethylene (high-density polyethylene, low-density polyethylene), polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, and polyethylene terephthalate.

[0029] The thickness of the metal or resin solid film is preferably 3 to 80 μm, more preferably 3 to 50 μm, and even more preferably 10 to 50 μm, from the viewpoint of maintaining the cushioning properties of the separator and stably forming the release layer described below.

[0030] The lamination of the solid film to the layer of porous material is carried out by a conventional method for producing laminated films, such as heat pressing using a heat press or continuous roll-to-roll heat lamination.

[0031] The "skin layer" is a thin porous layer formed on the surface of a layer made of a porous material, and has a smaller porosity than the layer made of the porous material. This layer may be provided to suppress elongation of the separator. The "porosity" refers to the area ratio of micropores to the area of ​​the thin layer in a plane perpendicular to the thickness direction of the layer made of the porous material. The porosity of the skin layer is preferably 10% or less, more preferably 5% or less, from the viewpoints of maintaining the cushioning properties of the layer made of the porous material and stably forming the release layer described below. The thickness of the skin layer is preferably 3 to 50 μm, more preferably 3 to 20 μm, from the viewpoints of maintaining the cushioning properties of the separator and stably forming the release layer described below. The skin layer can be formed, for example, by melting the surface of the porous material layer. For example, by using a heating roll set at a temperature about 5 to 20°C lower than the melting point of the porous material and reducing the rotation speed of the heating roll to be lower than the running speed of the porous material layer, the skin layer can be formed on the contact surface of the porous material layer with the heating roll.

[0032] The release layer is a layer formed on the contact surface between the separator and the adhesive body, which is less likely to be adhered by the adhesive body, and may be provided to facilitate separation of the separator from the adhesive body. The release layer can be formed, for example, by applying a release treatment agent (release agent) to the surface of the separator and curing it.

[0033] The release treatment agent (release agent) used to form the release layer is not particularly limited, and examples thereof include fluorine-based release agents, long-chain alkyl acrylate-based release agents, and silicone-based release agents. Silicone-based release agents are preferred, and curing methods such as ultraviolet irradiation and electron beam irradiation are preferred. Furthermore, among silicone-based release agents, cationically polymerizable ultraviolet-curable silicone-based release agents are preferred. Cationically polymerizable ultraviolet-curable silicone-based release agents are mixtures containing cationically polymerizable silicone (polyorganosiloxanes having epoxy functional groups in the molecule) and onium salt-based photoinitiators. Those in which the onium salt-based photoinitiator is a boron-based photoinitiator are particularly preferred. The use of cationically polymerizable ultraviolet-curable silicone-based release agents in which the onium salt-based photoinitiator is a boron-based photoinitiator provides particularly good releasability (mold releasability). The cationically polymerizable silicone (polyorganosiloxanes having epoxy functional groups in the molecule) has at least two epoxy functional groups per molecule and may be linear, branched, or a mixture thereof. The type of epoxy functional group contained in the polyorganosiloxane is not particularly limited, as long as it undergoes ring-opening cationic polymerization in the presence of an onium salt photoinitiator. Specific examples include γ-glycidyloxypropyl, β-(3,4-epoxycyclohexyl)ethyl, and β-(4-methyl-3,4-epoxycyclohexyl)propyl groups. Such cationic polymerization silicones (polyorganosiloxanes having epoxy functional groups in the molecule) are commercially available, and commercially available products can be used. Examples include UV9315, UV9430, UV9300, TPR6500, and TPR6501 manufactured by Toshiba Silicones Co., Ltd.; X-62-7622, ​​X-62-7629, X-62-7655, X-62-7660, and X-62-7634A manufactured by Shin-Etsu Chemical Co., Ltd.; and Poly200, Poly201, RCA200, RCA250, and RCA251 manufactured by Arakawa Chemical Industries, Ltd.

[0034] Furthermore, the silicone-based release agent can also be a thermosetting addition-type silicone-based release agent (thermosetting addition-type polysiloxane-based release agent).The thermosetting addition-type silicone-based release agent essentially comprises a polyorganosiloxane containing an alkenyl group as a functional group in the molecule (alkenyl group-containing silicone) and a polyorganosiloxane containing a hydrosilyl group as a functional group in the molecule.

[0035] Among the polyorganosiloxanes containing alkenyl groups as functional groups in the molecule, polyorganosiloxanes having two or more alkenyl groups in the molecule are preferred. Examples of the alkenyl groups include vinyl groups (ethenyl groups), allyl groups (2-propenyl groups), butenyl groups, pentenyl groups, and hexenyl groups. The alkenyl groups are usually bonded to silicon atoms (for example, terminal silicon atoms or silicon atoms within the main chain) of the polyorganosiloxane that forms the main chain or skeleton.

[0036] In addition, examples of the polyorganosiloxane forming the main chain or skeleton include polyalkylalkylsiloxanes (polydialkylsiloxanes) such as polydimethylsiloxane, polydiethylsiloxane, and polymethylethylsiloxane, as well as polyalkylarylsiloxanes, and copolymers using multiple silicon atom-containing monomer components [e.g., poly(dimethylsiloxane-diethylsiloxane)]. Among these, polydimethylsiloxane is preferred. That is, preferred examples of polyorganosiloxanes containing alkenyl groups as functional groups in the molecule include polydimethylsiloxanes having vinyl groups, hexenyl groups, or the like as functional groups.

[0037] The polyorganosiloxane crosslinking agent containing a hydrosilyl group as a functional group in the molecule is a polyorganosiloxane having a hydrogen atom (particularly a silicon atom having an Si-H bond) bonded to a silicon atom in the molecule, and a polyorganosiloxane having two or more silicon atoms having an Si-H bond in the molecule is particularly preferred. The silicon atom having an Si-H bond may be either a silicon atom in the main chain or a silicon atom in a side chain, that is, it may be contained as a structural unit of the main chain or as a structural unit of the side chain. The number of silicon atoms in the Si-H bond is not particularly limited as long as it is two or more. Specific examples of the polyorganosiloxane crosslinking agent containing a hydrosilyl group as a functional group in the molecule include polymethylhydrogensiloxane and poly(dimethylsiloxane-methylhydrogensiloxane).

[0038] The thermosetting silicone release treatment agent may contain a reaction inhibitor (reaction retarder) together with the thermosetting silicone resin to provide storage stability at room temperature. When a thermosetting addition type silicone release agent is used as the release agent, examples of the reaction inhibitor include 3,5-dimethyl-1-hexyn-3-ol, 3-methyl-1-penten-3-ol, 3-methyl-3-penten-1-yne, and 3,5-dimethyl-3-hexen-1-yne.

[0039] In addition to the above components, the thermosetting silicone-based release treatment agent may contain a release control agent, etc., if necessary. Specifically, a release control agent such as an MQ resin, or a polyorganosiloxane not having an alkenyl group or a hydrosilyl group (such as a trimethylsiloxy group-endblocked polydimethylsiloxane) may be added. The content of these components in the release treatment agent is not particularly limited, but is preferably 1 to 30 mass % based on the total solid content.

[0040] Thermosetting silicone release treatment agents typically contain a curing catalyst. The curing catalyst is preferably a platinum-based catalyst commonly used for thermosetting addition silicones. Among these, at least one platinum-based catalyst selected from chloroplatinic acid, platinum olefin complexes, and chloroplatinic acid olefin complexes is preferred. The curing catalyst can be used as is or in a form dissolved or dispersed in a solvent.

[0041] The amount of the curing catalyst (solid content) is preferably 0.05 to 0.55 parts by mass, and more preferably 0.06 to 0.50 parts by mass, per 100 parts by mass of the thermosetting silicone resin (resin content). If the amount of the curing catalyst is less than 0.05 parts by mass, the curing rate will be slow, and if it exceeds 0.55 parts by mass, the pot life will be significantly shortened.

[0042] In order to improve coating properties, an organic solvent is usually used in a coating liquid containing a release treatment agent used when providing a release layer. The organic solvent is not particularly limited, and examples that can be used include aliphatic or alicyclic hydrocarbon solvents such as cyclohexane, hexane, and heptane; aromatic hydrocarbon solvents such as toluene and xylene; ester solvents such as ethyl acetate and methyl acetate; ketone solvents such as acetone and methyl ethyl ketone; and alcohol solvents such as methanol, ethanol, and butanol. These organic solvents may be used alone or in combination of two or more.

[0043] The thickness of the release layer is preferably 0.001 to 10 μm, more preferably 0.03 to 5 μm, and particularly preferably 0.1 to 1 μm, from the viewpoint of excellent peelability (releasability) and suppression of thickness unevenness (stable formation of the release layer).

[0044] Furthermore, as the separator in this embodiment, a film that has been subjected to an uneven surface treatment can also be suitably used. Here, the surface roughness (Ra) of the film subjected to the unevenness treatment is preferably 0.05 μm or more, more preferably 0.07 μm or more, from the viewpoint of the shape retention of the filamentous adhesive. Furthermore, the surface roughness (Ra) is preferably 50 μm or less, more preferably 30 μm or less, because the filamentous adhesive becomes more likely to move during storage. The surface roughness (Ra) of the film subjected to the unevenness treatment is defined in accordance with JIS B 0601 (1994 edition), and can be measured using a stylus-type surface roughness measuring instrument (for example, a high-precision microprofile measuring instrument manufactured by Kosaka Laboratory, product name "Surfcorder ET4000").

[0045] Examples of methods for providing the uneven surface include embossing and blasting. Alternatively, a composition containing a binder resin and particles may be applied to the temporary support, and then the composition may be cured to form an uneven surface on the temporary support. Other known methods may also be used, such as screen printing, gravure printing, or transfer by nanoimprinting. Among these, embossing is particularly preferred because it is easy to obtain the desired releasability.

[0046] The material of the film to be subjected to the unevenness treatment is not particularly limited as long as it satisfies the above-mentioned compressive elastic modulus, and may be appropriately selected depending on the desired releasability, hardness, etc. For example, paper, resin film, metal foil, etc. that have been subjected to a roughening treatment can be used. Examples of resins that can be used to form the resin film include polyester resins, polyolefin resins, polyamide resins, polyimide resins, polyphenylene sulfide resins, polycarbonate resins, polyurethane resins, ethylene-vinyl acetate resins, fluorine-based resins such as polytetrafluoroethylene, and acrylic resins such as polymethyl methacrylate. The resin film may be formed using a resin material containing one of these resins alone, or may be formed using a resin material in which two or more of these resins are blended. The resin film may be unstretched or stretched (uniaxially or biaxially stretched).

[0047] Furthermore, the film having been subjected to the uneven surface treatment can also be subjected to a release treatment as needed. The release treatment is the same as the release treatment applied to the separator mainly made of the above-mentioned porous material.

[0048] The thickness of the separator in this embodiment is not particularly limited as long as it has the above-mentioned compressive elastic modulus, but from the viewpoint of handleability, it is preferably 10 μm or more, more preferably 20 μm or more. Furthermore, the upper limit of the thickness of the separator in this embodiment is also not particularly limited, and may be, for example, 10,000 μm or less, but from the viewpoint of cost, it is preferably 1,000 μm or less, more preferably 700 μm or less.

[0049] The adhesive body in this embodiment is not particularly limited as long as it is linear. The cross-sectional shape of the adhesive body in this embodiment is circular in Fig. 1(b), but is not limited thereto and may be various shapes such as an ellipse, a rectangle such as a square, etc. Furthermore, the thickness of the adhesive body in this embodiment is not particularly limited, and a thickness suitable for the application can be selected, but it is usually about 0.01 to 3 mm. Furthermore, the length of the adhesive body in this embodiment is not particularly limited, and a length suitable for the application can be selected.

[0050] The adhesive body in this embodiment may include a core material and a layer (adhesive layer) made of an adhesive that covers the core material, or may be made of only an adhesive without including a core material.

[0051] The adhesive constituting the adhesive body in this embodiment is not particularly limited, and known adhesives can be used. Examples include acrylic adhesives, rubber adhesives, vinyl alkyl ether adhesives, silicone adhesives, polyester adhesives, polyamide adhesives, urethane adhesives, fluorine-based adhesives, and epoxy adhesives. Among these, rubber adhesives and acrylic adhesives are preferred from the viewpoint of adhesiveness, and acrylic adhesives are particularly preferred. Note that only one type of adhesive may be used alone, or two or more types may be used in combination.

[0052] Acrylic adhesives are primarily composed of polymers of monomers that contain alkyl (meth)acrylate esters such as ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, isooctyl acrylate, and isononyl acrylate as the main component, with modifying monomers such as acrylonitrile, vinyl acetate, styrene, methyl methacrylate, acrylic acid, maleic anhydride, vinylpyrrolidone, glycidyl methacrylate, dimethylaminoethyl methacrylate, hydroxyethyl acrylate, and acrylamide added as needed.

[0053] Rubber-based adhesives are made primarily from rubber polymers such as natural rubber, styrene-isoprene-styrene block copolymer, styrene-butadiene-styrene block copolymer, styrene-ethylene-butylene-styrene block copolymer, styrene-butadiene rubber, polybutadiene, polyisoprene, polyisobutylene, butyl rubber, chloroprene rubber, and silicone rubber.

[0054] These adhesives may also be appropriately blended with various additives such as tackifying resins such as rosin-based, terpene-based, styrene-based, aliphatic petroleum-based, aromatic petroleum-based, xylene-based, phenol-based, coumarone-indene-based, and hydrogenated versions of these, as well as crosslinking agents, viscosity modifiers (thickeners, etc.), leveling agents, release modifiers, plasticizers, softeners, fillers, colorants (pigments, dyes, etc.), surfactants, antistatic agents, preservatives, antioxidants, UV absorbers, antioxidants, and light stabilizers.

[0055] The adhesive may be either a solvent-based adhesive or a water-dispersed adhesive, with water-dispersed adhesives being preferred because they allow high-speed coating, are environmentally friendly, and have minimal effects on the core material (swelling, dissolution) due to the solvent.

[0056] Furthermore, the adhesive in this embodiment is preferably a pressure-sensitive adhesive. That is, the adhesive constituting the adhesive in this embodiment is preferably a pressure-sensitive adhesive. When a pressure-sensitive adhesive is used as the adhesive constituting the adhesive, the adhesive is easy to work with when it is attached to an object (adherend). Furthermore, when a hot-melt adhesive is used, for example, heating is required when attaching the adhesive to the adherend, which may cause deterioration of the adherend. However, when a pressure-sensitive adhesive is used, there is no risk of such deterioration.

[0057] In the case where the adhesive body of the present embodiment includes a core material, the material of the core material is not particularly limited and can be appropriately selected depending on the required properties such as strength, weight, and hardness. For example, resin, rubber, foam, inorganic fiber, composites thereof, etc. can be used. Examples of resins include polyolefins such as polyethylene (PE), polypropylene (PP), ethylene-propylene copolymer, and ethylene-vinyl acetate copolymer; polyesters such as polyethylene terephthalate (PET); vinyl chloride resin; vinyl acetate resin; polyimide resin; polyamide resin; fluorine-based resin; etc. Examples of rubbers include synthetic rubbers such as natural rubber and urethane rubber. Examples of foams include polyurethane foam and polychloroprene rubber foam. Examples of fibers include glass fiber, carbon fiber, and metal fiber. The cross-sectional shape of the core material is also not particularly limited.

[0058] Furthermore, if the adhesive body in this embodiment is in the form of a thread, it is preferable because the adhesive body can be arranged on the adherend in various shapes, such as a curved shape. Examples of materials that can be used for the thread-like core material in the thread-like adhesive include various polymeric materials such as rayon, cupra, acetate, promix, nylon, aramid, vinylon, vinylidene, polyvinyl chloride, polyester, acrylic, polyethylene, polypropylene, polyurethane, polychlor, and polylactic acid; various rubbers, such as glass, carbon fiber, and synthetic rubbers, such as natural rubber and polyurethane; natural materials, such as cotton and wool; and metals. Examples of the form of the thread-like core material include monofilament, multifilament, spun yarn, textured yarn, bulky yarn, and stretch yarn, which have been subjected to crimping or bulking processes, as well as yarns that are combinations of these by twisting them together. The cross-sectional shape can be not only circular, but also rectangular, such as square, star-shaped, elliptical, hollow, and the like.

[0059] In addition, when the adhesive body is a thread-like adhesive body (thread-like adhesive body), it is preferable that the separator is easily deformed even at a low compressive stress of, for example, 0.01 MPa, because it is thinner and more easily deformed than other linear members such as cables. Therefore, the compressive strain value ε2 at a compressive stress σ2 of 0.01 MPa is preferably 0.01 or more, more preferably 0.02 or more.

[0060] If necessary, the core material may contain various additives such as fillers (inorganic fillers, organic fillers, etc.), antioxidants, antioxidants, ultraviolet absorbers, antistatic agents, lubricants, plasticizers, colorants (pigments, dyes, etc.), etc. The surface of the core material may be subjected to known or conventional surface treatments such as corona discharge treatment, plasma treatment, and application of a primer.

[0061] Furthermore, when the adhesive body of this embodiment includes a core material and an adhesive layer, the amount of adhesive (weight of the adhesive layer per unit length) is not particularly limited and may be determined appropriately depending on the type of member to be attached and the intended use. From the viewpoint of adhesiveness, however, for example, 2 mg / m or more is preferable, 5 mg / m or more is more preferable, and 8 mg / m or more is even more preferable. On the other hand, if the amount of adhesive is excessive, the adhesive must be applied to the core material multiple times during the manufacturing process, and the applied adhesive takes time to dry, resulting in low manufacturing efficiency. Therefore, the amount of adhesive is preferably 200 mg / m or less, more preferably 180 mg / m or less, and even more preferably 160 mg / m or less. The thickness of the core material is not particularly limited either and may be determined appropriately depending on the type of member to be attached and the intended use, but is, for example, about 20 to 2000 dtex.

[0062] Furthermore, when the adhesive body of this embodiment comprises a core material and a pressure-sensitive adhesive layer, the pressure-sensitive adhesive layer may cover the entire surface of the core material (the surface in the longitudinal direction), or may cover only a portion of the surface of the core material. Furthermore, the pressure-sensitive adhesive layer is typically formed continuously, but is not limited to such a form and may be formed in a regular or random pattern, such as a dotted or striped pattern. The end surfaces of the core material may or may not be covered by the pressure-sensitive adhesive layer. For example, when the pressure-sensitive adhesive article is cut during the manufacturing process or during use, the end surfaces of the core material may not be covered by the pressure-sensitive adhesive layer.

[0063] An adhesive body without a core material can be obtained, for example, by next preparing an adhesive, applying the adhesive in a line shape to the separator using a dispenser, and drying it by heating as necessary. An adhesive body having a core material can be obtained, for example, by applying an adhesive to a core material using a conventional coater such as a gravure roll coater, reverse roll coater, kiss roll coater, dip roll coater, bar coater, knife coater, or spray coater, and then drying appropriately.

[0064] [Second embodiment] The separator-attached adhesive body according to the second embodiment of the present invention comprises a linear adhesive body and a separator, a slit is formed in the separator, and at least a part of the adhesive body is disposed in the slit. Figure 6(a) shows a cross-sectional view perpendicular to the longitudinal direction of the separator-attached adhesive body 30 of this embodiment, and Figure 6(b) shows a cross-sectional view perpendicular to the winding direction of a roll of the separator-attached adhesive body 30 of this embodiment (roll-shaped separator-attached adhesive body 30).

[0065] In the separator-attached adhesive body 30 of this embodiment, at least a part of the linear adhesive body 31 is disposed within the slit 33, and therefore, even when rolled up, it is not easily subjected to pressure from the separator 32 and is not easily crushed. Furthermore, in this embodiment, at least a part of the linear adhesive body is disposed within the slit, and therefore it is not easily dropped off.

[0066] The shape, width, depth, etc. of the slit in this embodiment are not particularly limited as long as at least a part of the adhesive body can be placed inside the slit. In order to further reduce the pressure applied from the separator to the adhesive body and make the adhesive body even more difficult to crush, it is preferable that the shape, width, depth, etc. of the slit be configured so that the entire adhesive body can be stored in the slit. That is, in a cross-sectional view perpendicular to the longitudinal direction when the adhesive body 31 is stored (not wound, etc.), the slit 33 of this embodiment is preferably configured so that the adhesive body 31 does not protrude from the surface 32a of the separator 32 on which the slit 33 is formed, as shown in the configuration examples in Figures 6(a) and (b). Examples of the cross-sectional shape of such a slit include a V-shape, a U-shape, an arc-shape, a concave shape, etc. For example, in the configuration example shown in Fig. 6(a), the cross-sectional shape of the slit 33 is V-shaped, and in the configuration example shown in Fig. 7(a), the cross-sectional shape of the slit 43 is concave. In the configuration examples shown in Fig. 7(a) and (b), the separator-attached adhesive body 40 is also preferably configured so that the adhesive body 41 does not protrude from the surface 42a of the separator 42 on the side where the slit 43 is formed. The cross-sectional shape of the slit is not limited to a straight line or a curved line, but may be a zigzag line, a wavy line, or the like. On the other hand, from the viewpoint of productivity, it is preferable that the slits are formed in the form of simple cuts, for example, as shown in FIG. 5(a). Furthermore, if the slit is formed along the longitudinal direction of the separator, it is preferable because the separator-attached adhesive body can be easily wound into a roll.

[0067] In this embodiment, the number of slits formed in the separator is not particularly limited, and may be 1 or 2 or more. Furthermore, slits may be formed on only one side of the separator, or on both sides.

[0068] Although the compressive elastic modulus of the separator in this embodiment is not particularly limited, in order to further reduce the stress that the adhesive body receives from the separator and make the adhesive body even more resistant to crushing, it is preferable that the separator in this embodiment also has high cushioning properties. From this viewpoint, it is preferable that the separator in this embodiment also has a compressive elastic modulus of 1.5 MPa or less, as in the first embodiment.

[0069] In addition, the material of the separator in this embodiment is not particularly limited, but in order to easily obtain high cushioning properties, the separator in this embodiment is preferably a separator mainly made of a porous material, as in Embodiment 1. As the porous material, for example, those exemplified in the section of the first embodiment can be used.

[0070] Furthermore, the separator of this embodiment may include other layers such as a metal or resin solid film, a skin layer, a release layer, etc., similar to the separator of the first embodiment. Furthermore, the adhesive body of this embodiment is not particularly limited as long as it is thread-like, and the same adhesive body as described in the section of the first embodiment can be used.

[0071] When using the separator-attached adhesive body of each embodiment described above, for example, it can be used in a mode in which the adhesive body is peeled off from the separator and attached to an adherend. Alternatively, it can be used in a mode in which the separator-attached adhesive body together with the separator is attached to an adherend, and then the separator is peeled off, that is, the adhesive body is transferred to the adherend.

[0072] The transfer method when a thread-like adhesive body (thread-like adhesive body) is used will be described below. First, the adhesive surface of the thread-like adhesive body attached to a separator is brought into contact with the adherend, and the thread-like adhesive body is pressed against the adherend via the separator using a roller, fingers, or the like to adhere it. Thereafter, the separator is peeled off and removed from the adhesive threads adhered to the adherend to expose the adhesive threads, thereby attaching the adhesive threads to the adherend in a desired shape.

[0073] To ensure reliable transfer of the thread-like adhesive, i.e., to prevent the thread-like adhesive from peeling off from the adherend and remaining on the separator, peeling is preferably performed when peeling and removing the separator from the adherend, with the peel angle being preferably 5° or greater, more preferably 10° or greater, and even more preferably 20° or greater. When peeling, the separator may be peeled off while deforming, the adherend may be peeled off while deforming, or both the separator and the adherend may be peeled off while deforming. A suitable peeling method may be selected depending on the hardness (ease of deformation) of the separator and the adherend.

[0074] As described above, the thread-like adhesive is formed (drawn) on the separator in a shape that is the inverse of the desired shape, and then transferred to the separator, so that the thread-like adhesive is attached to the adherend in the desired shape. In this way, the thread-like adhesive can be easily attached to the adherend even when the attachment shape is complex. Because of these characteristics, the method of attaching a thread-like adhesive by transfer is suitable as a method of attaching a thread-like adhesive for fixing, in a desired shape, cables such as electric wires and optical fibers, LED fiber lights, optical fiber sensors such as FBGs (Fiber Bragg Gratings), various wires (linear members) such as threads, strings, and wires, and thin members. Even in cases where a wire or thin member is to be fixed to another member with a complex shape, the method of attaching a thread-like adhesive by transfer makes it possible to easily attach the thread-like adhesive to the member to which the wire or thin member is to be attached, in accordance with the complex shape that the wire or thin member should have. Furthermore, for example, if a thread-like adhesive is used for temporary fixing (temporarily fastening) when sewing textile products such as clothes, shoes, bags, hats, and leather products, it is easy to temporarily fix the product while avoiding the sewn area, and it is easy to prevent the adhesive from adhering to the needle. If the product to be sewn has a complex shape or is easily deformed, it may not be easy to apply the thread-like adhesive, but even in such cases, the above-mentioned application method using transfer of the thread-like adhesive can easily apply the thread-like adhesive. [Example]

[0075] The present invention will be specifically explained below with reference to examples, but the present invention is not limited to these examples in any way.

[0076] (Preparation of adhesive) A reaction vessel equipped with a condenser, nitrogen inlet tube, thermometer, and stirrer was charged with 40 parts by mass of ion-exchanged water, and nitrogen gas was introduced while stirring at 60°C for at least 1 hour to perform nitrogen substitution. 0.1 parts by mass of 2,2'-azobis[N-(2-carboxyethyl)-2-methylpropionamidine]n hydrate (polymerization initiator) was added to the reaction vessel. While maintaining the system at 60°C, Monomer Emulsion A was gradually added dropwise over 4 hours to allow the emulsion polymerization reaction to proceed. Monomer emulsion A was prepared by adding 98 parts by mass of 2-ethylhexyl acrylate, 1.25 parts by mass of acrylic acid, 0.75 parts by mass of methacrylic acid, 0.05 parts by mass of lauryl mercaptan (chain transfer agent), 0.02 parts by mass of γ-methacryloxypropyltrimethoxysilane (manufactured by Shin-Etsu Chemical Co., Ltd., trade name "KBM-503"), and 2 parts by mass of sodium polyoxyethylene lauryl sulfate (emulsifier) ​​to 30 parts by mass of ion-exchanged water and emulsifying them. After the dropwise addition of monomer emulsion A was completed, the system was maintained at 60°C for an additional 3 hours, cooled to room temperature, and then the pH was adjusted to 7 by adding 10% aqueous ammonia, yielding an acrylic polymer emulsion (water-dispersible acrylic polymer). For every 100 parts by mass of the acrylic polymer contained in the acrylic polymer emulsion, 20 parts by mass (solids) of a tackifier resin emulsion (manufactured by Arakawa Chemical Industries, Ltd., product name "E-865NT") was added. Furthermore, the pH was adjusted to 7.2 and the viscosity to 10 Pa·s using 10% by mass ammonia water as a pH adjuster and polyacrylic acid (manufactured by Toagosei Co., Ltd., product name "Aron B-500") as a thickener. In this way, a water-dispersible acrylic pressure-sensitive adhesive was obtained.

[0077] (Preparation of adhesive body) A multifilament yarn (280 dtex) consisting of 48 polyester yarns (filaments) twisted at 150 turns / m was used as the core material. The water-dispersible acrylic pressure-sensitive adhesive obtained above was applied to this core material by dipping so that the adhesive amount in the resulting adhesive body was 22 mg / m, and then dried at 80°C for 5 minutes to form an adhesive layer, thereby obtaining an adhesive body (thread-like adhesive body).

[0078] Example 1 A polyethylene foam substrate (PE, manufactured by Nitto Denko Corporation) measuring 4 cm in length, 4 cm in width, and 0.5 mm in thickness was prepared as a separator. The 4 cm long thread-like adhesive material prepared as described above was attached to one side of this separator from the opposite side to obtain an adhesive material with a separator of Example 1.

[0079] <Example 2> An adhesive body with a separator of Example 2 was obtained in the same manner as in Example 1, except that an embossed polyurethane film (surface roughness Ra: 0.2 μm) measuring 4 cm in length, 4 cm in width, and 0.3 mm in thickness was used as the separator.

[0080] Example 3 An adhesive body with a separator of Example 3 was obtained in the same manner as in Example 1, except that a foamed polyethylene P1005 (manufactured by Fuji Rubber Co., Ltd.) measuring 4 cm in length, 4 cm in width, and 10 mm in thickness was used as the separator.

[0081] Example 4 An adhesive body with a separator of Example 4 was obtained in the same manner as in Example 1, except that a rubber sponge NR33 (manufactured by Inoac Corporation) measuring 4 cm in length, 4 cm in width, and 5 mm in thickness was used as the separator.

[0082] <Example 5> A polyethylene terephthalate (PET) film measuring 4 cm in length, 5 cm in width, and 0.5 mm in thickness was prepared as a separator. A 0.2 mm deep, 0.4 mm wide concave slit was formed in the separator from the 5 cm edge to the opposing 5 cm edge using a TAMIYA CRAFT TOOLS FINE ENGRAVING BLADE (0.4 mm carbide engraving blade, Tamiya Corporation) as shown in Figure 7(a). The 4 cm long filamentous adhesive body prepared as described above was inserted into the formed slit, yielding an adhesive body with a separator according to Example 5.

[0083] Example 6 An adhesive body with a separator of Example 6 was obtained in the same manner as in Example 5, except that the shape of the slit was changed to a V-shaped slit with a depth of 0.4 mm and a width of 0.4 mm as shown in Figure 6(a). The V-shaped slit was formed by placing a 5 cm razor blade obliquely against the separator surface from one 5 cm side to the opposite 5 cm side and gradually hitting it with a hammer.

[0084] Example 7 An adhesive body with a separator of Example 7 was obtained in the same manner as in Example 5, except that the shape of the slit was changed to a V-shaped slit with a depth of 0.2 mm and a width of 0.4 mm as shown in Figure 6(a). The V-shaped slit was formed by placing a 5 cm razor blade obliquely against the separator surface from one 5 cm side to the opposite 5 cm side and gradually hitting it with a hammer.

[0085] Example 8 An adhesive body with a separator of Example 8 was obtained in the same manner as in Example 5, except that a polyethylene foam substrate (manufactured by Nitto Denko Corporation) measuring 4 cm in length, 5 cm in width, and 0.5 mm in thickness was used as the separator.

[0086] Example 9 A polyethylene foam substrate (manufactured by Nitto Denko Corporation) measuring 4 cm in length, 5 cm in width, and 0.5 mm in thickness was prepared as a separator. A 0.2 mm deep, notched slit was formed in this separator from one side to the opposing side, as shown in Figure 5(a). The thread-like adhesive body prepared as above, having a length of 4 cm, was placed in the formed slit, and an adhesive body with a separator of Example 9 was obtained. The cut-like slits were formed by placing a 5 cm razor blade perpendicularly against the separator surface from one 5 cm side to the opposing 5 cm side and slowly hitting it with a hammer.

[0087] <Comparative Example 1> An adhesive body with a separator of Comparative Example 1 was obtained in the same manner as in Example 1, except that a polyethylene terephthalate (PET) film measuring 4 cm in length, 4 cm in width, and 0.5 mm in thickness was used as the separator.

[0088] (Compression modulus) The compressive modulus of the separator was measured by the following compression test using an autograph (a small tabletop tester EXtest manufactured by Shimadzu Corporation). The results are shown in Table 1. In a room at 23°C, the separator (4 cm long x 4 cm wide) used in each example was placed on an acrylic stand, and a cylindrical indenter (made of SUS, indenter area: 100 mm 2 The compressive stress was measured while pressing the separator vertically against the center of the separator at a compression rate of 0.1 mm / min, and the compressive modulus E (MPa) was calculated using the following formula. E(MPa)=(σ2-σ1) / (ε2-ε1) Compressive stress σ1: 0.005 (MPa) Compressive stress σ2: 0.01 (MPa) Compressive strain value ε1: Compressive strain value at compressive stress σ1 Compressive strain value ε2: Compressive strain value at compressive stress σ2

[0089] (Shape retention of adhesive body) The separator-attached adhesive body prepared in each Example was placed on a first acrylic plate measuring 4 cm long x 4 cm wide, with the surface of the separator-attached adhesive body facing downward, and a second acrylic plate was placed on top of it (first acrylic plate / adhesive body / separator / second acrylic plate). A load of 2 kg was applied from above for 20 minutes, and after the load was removed, the adhesive body was visually inspected to see if it retained its shape according to the following evaluation criteria. The results are shown in Tables 1 and 2. ◎: The same shape as before the load was applied is maintained 〇: The shape remains almost the same as before the load was applied △: The adhesive body was crushed and spread out horizontally, but the shape of the adhesive body was maintained ×: The adhesive body is crushed and spreads sideways, and the shape of the adhesive body cannot be maintained.

[0090] [Table 1]

[0091] As shown in Table 1, in the separator-attached adhesive bodies of Examples 1 to 4, in which the separator had a compressive modulus of elasticity of 1.5 MPa or less, crushing of the adhesive body was suppressed or prevented even after a load was applied, and the shape of the adhesive body was maintained. On the other hand, in the separator-attached adhesive body of Comparative Example 1, in which the separator had a compressive modulus of elasticity of more than 1.5 MPa, the adhesive body was crushed after a load was applied, and the shape of the adhesive body could not be maintained.

[0092] [Table 2]

[0093] As shown in Table 2, in the separator-attached adhesive bodies of Examples 5 to 9, in which a slit was formed in the separator and the adhesive body was placed in the slit, crushing of the adhesive body was suppressed or prevented even after a load was applied, and the shape of the adhesive body was maintained. Even in the separator-attached adhesive bodies of Examples 5 to 7, in which the separator had a compressive modulus of elasticity exceeding 1.5 MPa, the slits formed in the separator prevented the adhesive body from being deformed and crushed. In Example 7, in which the slits were shallower than in Example 6, the adhesive body was crushed and spread out horizontally, but the shape of the adhesive body was maintained. In Example 8, in which the separator had a compressive modulus of elasticity of 1.5 MPa or less, no deformation of the adhesive body was observed, and in Example 9, the shape remained almost the same as before the load was applied.

[0094] The separator-attached adhesive body of the present invention as described above is preferable because it can protect linear adhesive bodies by suppressing or preventing them from being crushed or falling off. Furthermore, the separator-attached adhesive body of the present invention can protect even linear adhesive bodies with high adhesive strength by suppressing or preventing them from being crushed or falling off.

[0095] The present invention is not limited to the above-described embodiments, and can be appropriately modified, improved, etc. In addition, the material, shape, dimensions, numerical values, form, number, location, etc. of each component in the above-described embodiments are arbitrary and not limited as long as they can achieve the present invention. [Explanation of symbols]

[0096] 10, 20, 30, 40 adhesive with separator 11, 21, 31, 41 Adhesive 12, 22, 32, 42 separator 32a, 42a: The surface of the separator on which the slit is formed 14 reels 23, 33, 43 slits

Claims

1. The adhesive tape comprises a linear adhesive body and a separator, The separator has a compressive modulus of elasticity of 1.5 MPa or less.

2. The separator-attached adhesive body according to claim 1, wherein a slit is formed in the separator, and at least a portion of the adhesive body is disposed in the slit.

3. The adhesive tape comprises a linear adhesive body and a separator, The separator has a slit formed therein, and at least a portion of the adhesive body is disposed within the slit.

4. The separator-attached adhesive body according to claim 2 or 3, wherein the slit is formed along the longitudinal direction of the separator.

5. The separator-attached adhesive body according to any one of claims 1 to 4, wherein the adhesive body is thread-shaped.

6. The separator-attached adhesive body according to any one of claims 1 to 5, wherein the separator-attached adhesive body is wound in a roll shape.

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