Pressure-sensitive transfer adhesive tape and transfer tools

Abstract

To provide a pressure-sensitive transfer adhesive tape or transfer tool having good ease of use which can smoothly transfer an adhesive to a transfer target surface.SOLUTION: There is provided a pressure-sensitive transfer adhesive tape 1 which has a tape base material stretching in a transfer direction and adhesive layers 12 having an adhesive applied on one surface of the tape base material and is configured so that the adhesive is sequentially transferred to the transfer target surface by each part of the tape base material being sequentially pressed onto the transfer target surface by a transfer head moving relative to the transfer direction, wherein the adhesive layers 12 are formed by alternately arranging strip-shaped adhesive parts 121 and a void with no adhesive in the transfer direction, each of the strip-shaped adhesive parts 121 is inclined by a minute angle θ with respect to a tape short direction orthogonal to the transfer direction and the minute angle θ is set to a value where equal to or more than half of an area of one strip-shaped adhesive part 121 can temporarily fit within a pressure contact area A in a process where the adhesive layer 12 on the tape base material passes through the pressure contact area A pressed against the transfer target surface by a transfer head.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a pressure-sensitive transfer adhesive tape that supports an adhesive and is used to adhere paper such as envelopes and other adherends, and a transfer tool used to transfer the adhesive from this adhesive tape to the target surface of the adherend. [Background technology]

[0002] So-called "tape glue," that is, pressure-sensitive transfer adhesive tape in which an adhesive layer is provided on a long tape-shaped substrate, and transfer tools loaded with this, are widely available (see, for example, the following prior art documents). Transcription The device comprises a supply reel that holds the adhesive tape in a wound state, a transfer head around which the tape is wound, and a take-up reel that takes up the tape.

[0003] A user who wishes to use a transfer tool to apply adhesive to the target surface of an object, such as the flap (fold) of an envelope, grasps the transfer tool, presses the transfer head against the target surface, and then pulls the transfer tool in a certain direction. Through this operation, the tape substrate backed by the adhesive is unwound from the supply reel and directed toward the transfer head, and the tape substrate and the adhesive supported thereon are pressed against the target surface via the transfer head, resulting in the adhesive being transferred from the tape substrate to the target surface. After the adhesive has been transferred, the tape substrate is wound onto a take-up reel linked to the supply reel and collected.

[0004] In this type of product, along with adhesive strength, good adhesive release during use is also important. If adhesive release is poor, a tug-of-war occurs between the tape substrate and the surface to be transferred, causing the adhesive to tear off in a stringy motion between the two, leaving some of the adhesive remaining on the tape substrate.

[0005] As an effective method for improving adhesive breakage, dot pattern coating has been conventionally adopted, in which countless small blocks of adhesive are intermittently coated onto a tape substrate using printing technologies such as screen printing, gravure printing, offset printing, flexographic printing, etc. Another advantage of the dot pattern is that when the adhesive is transferred to the target surface, air can be released from between the scattered adhesive blocks, effectively avoiding the problem of air being trapped between the adhesive and the adherend, causing bubbles and wrinkles.

[0006] The adhesive layer of a ready-made adhesive tape has a structure in which multiple circular adhesive blocks are arranged horizontally along the short dimension of the tape, which is perpendicular to the transfer direction (the direction in which the tape substrate is stretched), and these band-shaped adhesive blocks are further arranged sequentially along the transfer direction. [Prior art documents] [Non-patent literature]

[0007] [Non-Patent Document 1] "Glue Tape <Dot Liner> | KOKUYO Stationery" (Dot Liner and KOKUYO are registered trademarks), [online], Reiwa 3, KOKUYO Co., Ltd., [Retrieved May 11, 2021], Internet<URL:https: / / www.kokuyo-st.co.jp / stationery / dotliner / > Summary of the Invention [Problem to be solved by the invention]

[0008] The present invention aims to realize a pressure-sensitive transfer adhesive tape or transfer tool that is easy to use and that can smoothly transfer an adhesive from a tape substrate to a target surface. [Means for solving the problem]

[0009] In order to solve the above-mentioned problems, the present invention provides a pressure-sensitive transfer adhesive tape and a method for sequentially transferring each portion of the pressure-sensitive transfer adhesive tape by moving the tape relative to a transfer target surface. The aforementioned Press the adhesive onto the surface to be transferred. The aforementioned A transfer tool comprising a transfer head that transfers onto a transfer target surface, and a tape supply mechanism that sequentially supplies the pressure-sensitive transfer adhesive tape to the transfer head at a speed corresponding to the relative movement, wherein the pressure-sensitive transfer adhesive tape comprises a tape substrate that stretches in the transfer direction, and an adhesive layer having an adhesive coated on one surface of the tape substrate, and each portion of the tape substrate is sequentially transferred by the transfer head that moves relatively in the transfer direction. The aforementioned The adhesive layer is configured so that the adhesive is sequentially transferred to the transfer surface by being pressed against the transfer target surface, the adhesive layer has strip-shaped adhesive portions and void portions without adhesive arranged alternately in the transfer direction, and each strip-shaped adhesive portion is inclined at a small angle with respect to the tape short dimension direction perpendicular to the transfer direction, The minute angle is set to a value that allows more than half of the area of ​​one of the strip-shaped adhesive portions to temporarily fit within the pressure contact area during the process of passing through the pressure contact area where the adhesive layer on the tape substrate is pressed against the surface to be transferred by the transfer head, and a transfer tool is constructed in which the dimension of the pressure contact area along the transfer direction is approximately 20% to approximately 62.5% of the diameter of the transfer head.

[0010] In the present invention, a pressure-sensitive transfer adhesive tape is attached to a surface to be transferred, and each portion of the pressure-sensitive transfer adhesive tape is sequentially transferred by relative movement with respect to the surface to be transferred. The aforementioned Press the adhesive onto the surface to be transferred. The aforementioned A transfer tool comprising a transfer head for transferring onto a transfer target surface, and a tape supply mechanism for sequentially supplying the pressure-sensitive transfer adhesive tape to the transfer head at a speed corresponding to the relative movement, wherein the pressure-sensitive transfer adhesive tape comprises a tape substrate stretching in the transfer direction and an adhesive layer having an adhesive coated on one surface of the tape substrate, and each portion of the tape substrate moves relatively in the transfer direction. The aforementioned The transfer head sequentially The aforementionedThe transfer tool is configured so that the adhesive is sequentially transferred onto the transfer target surface by being pressed against the transfer target surface, the adhesive layer having strip-shaped adhesive portions and adhesive-free void portions arranged alternately in the transfer direction, each strip-shaped adhesive portion being inclined at a slight angle with respect to the tape short dimension direction perpendicular to the transfer direction, and the slight angle is set so that the angle θ with respect to the tape short dimension direction satisfies H≧h+w tan θ (where h is the maximum dimension along the transfer direction of the cross section of the adhesive obtained by cutting one strip-shaped adhesive portion along a line parallel to the transfer direction, w is the width of the tape substrate along the tape short dimension direction, and H is the dimension along the transfer direction of the pressure contact area where the adhesive layer on the tape substrate is pressed against the transfer target surface by the transfer head), and the dimension H of the pressure contact area along the transfer direction is about 20% to about 62.5% of the diameter of the transfer head).

[0011] The pressure-sensitive transfer adhesive tape according to the present invention comprises a tape substrate stretching in a transfer direction and an adhesive layer having an adhesive coated on one surface of the tape substrate, and each portion of the tape substrate is sequentially transferred by a transfer head that moves relatively in the transfer direction. The aforementionedThe adhesive layer is configured so that the adhesive is sequentially transferred onto the transfer target surface by being pressed against the transfer target surface, and the adhesive layer has strip-shaped adhesive portions and adhesive-free void portions alternately arranged in the transfer direction, and each strip-shaped adhesive portion is inclined at a small angle with respect to the tape's short dimension direction, which is perpendicular to the transfer direction. The small angle is set to a value that allows more than half of the area of ​​one strip-shaped adhesive portion to temporarily fit within a pressure contact area in the process of the adhesive layer on the tape substrate passing through a pressure contact area where the transfer head presses the adhesive layer onto the transfer target surface. Alternatively, the minute angle θ is set so that the angle θ with respect to the tape short-dimension direction satisfies H≧h+w tan θ (where h is the maximum dimension along the transfer direction of the cross section of the adhesive obtained by cutting one of the strip-shaped adhesive portions along a line parallel to the transfer direction, w is the width along the tape short-dimension direction of the tape substrate, and H is the dimension along the transfer direction of the pressure-contact area where the adhesive layer on the tape substrate is pressed against the transfer target surface by the transfer head). The dimension along the transfer direction of the pressure-contact area is, for example, about 20% to about 62.5% of the diameter of the transfer head. The minute angle θ is set so that θ<about 10°, for example.

[0012] More preferably, the minute angle is set to a value that allows the entire area of ​​one of the strip-shaped adhesive portions to be temporarily contained within the pressure-contact area during the process of the adhesive layer on the tape substrate passing through the pressure-contact area. Each of the strip-shaped adhesive portions may be formed by a plurality of adhesive blocks arranged in a straight line. The strip-shaped adhesive portions may be arranged such that the adhesive blocks are adjacent to each other with some overlapping with each other.

[0013] If the adhesive blocks of the strip-shaped adhesive portion that are closest in the transfer direction are arranged so that they interlock without contacting each other while being relatively offset in the short dimension direction of the tape, the coating area ratio, which is the ratio of the adhesive blocks per unit area of ​​the tape substrate, can be significantly increased compared to existing pressure-sensitive transfer adhesive tapes, which helps to further increase the adhesive strength of the adhesive that is transferred and coated on the transfer target surface of the adherend.

[0014] More specifically, each adhesive block has a main adhesive area and a micro-adhesive area that protrudes integrally from this main adhesive area, and the micro-adhesive area of ​​the adhesive block in the strip-shaped adhesive portion on the rear side of the transfer direction is inserted into the gap formed between the adhesive blocks in the strip-shaped adhesive portion on the front side of the transfer direction.

[0015] In order to further improve adhesive removal, each of the gaps is designed to be continuous from one edge of the tape substrate in the short dimension direction to the other. [Effects of the Invention]

[0019] According to the present invention, it is possible to smoothly transfer an adhesive from a tape substrate to a transfer target surface, and it is possible to realize a pressure-sensitive transfer adhesive tape or transfer tool that is easy to use. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 1 is a perspective view showing a transfer tool according to an embodiment of the present invention. [Figure 2] FIG. 2 is a side view showing the transfer tool of the embodiment disassembled into a refill cartridge and a main body case. [Figure 3] FIG. 2 is an enlarged side view showing the transfer head and the pressure-sensitive transfer adhesive tape of the transfer tool of the embodiment. [Figure 4] FIG. 2 is a perspective view of the pressure-sensitive transfer adhesive tape of the embodiment. [Figure 5] FIG. 2 is a plan view showing the structure of the adhesive layer of the pressure-sensitive transfer adhesive tape of the embodiment. [Figure 6] FIG. 2 is an enlarged plan view showing the shape of an adhesive block that constitutes an adhesive layer of the pressure-sensitive transfer adhesive tape according to the embodiment; [Figure 7] FIG. 10 is a plan view showing the structure of an adhesive layer of a pressure-sensitive transfer adhesive tape according to a modified example of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0021] One embodiment of the present invention will be described with reference to the drawings. Figures 1 to 3 show a transfer tool 2 equipped with a pressure-sensitive transfer adhesive tape 1 according to this embodiment. The transfer tool 2 mainly comprises a refill cartridge 3 having a supply reel 31 and a take-up reel 32 for the adhesive tape 1 and a transfer head (roller) 33, a main case 4 in which the refill cartridge 3 is mounted and held, and an arm 5 rotatably connected to the main case 4 via a hinge.

[0022] 2 shows the state before the refill cartridge 3 is loaded into the main case 4 (or after the refill cartridge 3 has been removed from the main case 4). The pressure-sensitive transfer adhesive tape 1 is wound in advance around a pay-out reel 31. The adhesive tape 1 paid out from the pay-out reel 31 is wound around the outer periphery of a cylindrical transfer head 33 that is rotatably supported, and is then taken up onto a take-up reel 32.

[0023] The main case 4 is fitted with a main wheel 41 that pivotally supports the supply reel 31, a sub-wheel 42 that pivotally supports the take-up reel 32, and a gear 43 that is interposed between the two wheels 41, 42. These wheels 41, 42 and gear 43 cause the take-up reel 32 to rotate in response to the rotation of the supply reel 31. In the transfer tool 2, the reels 31, 32 and the wheels 41, 42 that support the reels 31, 32, and the gear 43 constitute a tape supply mechanism that sequentially supplies the adhesive tape 1 to the transfer head 33.

[0024] The arm 5, together with the main case 4 (and the refill cartridge 3 attached to the case), serves to clamp the adherend 0 having a transfer target surface onto which the adhesive 122 is to be transferred.

[0025] 1 and 3, when the object to be attached, for example the flap of a paper envelope 0, is clamped between the main case 4 and arm 5 of the transfer tool 2 and the transfer tool 2 is slid relatively in a fixed direction, typically along the width direction of the envelope 0, relative to the flap of the envelope 0, each section of the pressure-sensitive transfer adhesive tape 1 wrapped around the transfer head 33 is sequentially pressed against the inner surface of the flap, which is the surface to be transferred. Then, (blocks of) adhesive 122 coated on the base material 11 of the tape 1 is transferred to the inner surface of the flap.

[0026] At this time, the pressure-sensitive transfer adhesive tape 1 is gradually unwound from the supply reel 31 and gradually wound onto the take-up reel 32. More specifically, the tape 1 pressed against the flap of the envelope 0 is temporarily held to the flap by the adhesive 122, and the transfer head 33 moves toward the side of the supply reel 31 while pressing the tape 1 against the flap of the envelope 0. During this process, the transfer head 33 pulls out the tape 1 from the supply reel 31, and as the supply reel 31 pulled by the tape 1 rotates, the take-up reel 32 also rotates in conjunction with it. The rotational speeds of the supply reel 31 and the take-up reel 32 correspond to the speed of relative movement of the transfer tool 2 with respect to the flap of the envelope 0.

[0027] After the adhesive 122 is transferred to the inner surface of the flap, the flap is folded back to close the opening end of the main body (body) of the envelope 0, and the flap and the main body of the envelope 0 are pressed together with the adhesive 122 sandwiched between them, so that the flap is attached to the area near the opening of the main body and the envelope 0 is sealed.

[0028] 4 to 6, the pressure-sensitive transfer adhesive tape 1 of this embodiment is composed of a substrate 11 formed from a film in the shape of a long tape, and an adhesive layer 12 formed by applying an adhesive to one side of the tape substrate 11, i.e., the side that is exposed when the tape substrate 11 is wrapped around the transfer head 33 of the transfer tool 2 (the side that does not come into contact with the transfer head 33).

[0029] The film that is the material for tape substrate 11 is, for example, a polyethylene terephthalate film, but any material that can releasably support adhesive 12 may be used, including plastic films such as polyethylene, polypropylene, and polyvinyl chloride, as well as glassine paper and metal foil. It is also permissible to use substrate 11 in which a release layer made of silicone resin, fluororesin, or the like is provided on the outer surface of an object that does not have the ability to release adhesive 12, thereby imparting the ability to release adhesive 12.

[0030] 4 to 6, the adhesive layer 12 is formed by disposing a large number of adhesive blocks 122, separated by small gaps, intermittently on the tape substrate 11. Such an adhesive layer 12 can be formed by pattern coating using printing techniques such as screen printing, gravure printing, offset printing, and flexographic printing.

[0031] The type of adhesive 12 may be any type, such as acrylic, styrene, rubber, silicone, rosin, or urethane, but in order to apply it accurately and efficiently to the tape substrate 11 by a known printing method, it is preferable to use an acrylic adhesive containing an acrylic copolymer.

[0032] Among these, PSA compositions that have excellent heat resistance and weather resistance, which are necessary during production and storage, as well as excellent adhesive strength and cohesive strength, include those containing an acrylic triblock copolymer. The acrylic triblock copolymer is a triblock copolymer represented by the formula ABA or ABC (where A, B, and C each represent a different polymer block).

[0033] In the acrylic triblock copolymer, it is more preferable that at least one of the polymer blocks A, B, and C is composed of an alkyl acrylate unit and / or an alkyl methacrylate unit, and it is even more preferable that all of the polymer blocks A, B, and C are composed of an alkyl acrylate unit and / or an alkyl methacrylate unit. It is particularly preferable that the polymer block A is composed of an alkyl methacrylate, the polymer block B is composed of an alkyl alkyl ester, and the polymer block C is composed of an alkyl methacrylate or an alkyl acrylate.

[0034] Particularly suitable examples of acrylic triblock copolymers include triblock copolymers of the formula ABA or ABC, such as polymethyl methacrylate-b-polyn-butyl acrylate-b-polymethyl methacrylate, polymethyl methacrylate-b-polyethyl acrylate-b-polymethyl methacrylate, polymethyl methacrylate-b-polyn-butyl acrylate-b-polymethyl acrylate, polymethyl methacrylate-b-polyn-butyl acrylate-b-polyethyl acrylate, polymethyl methacrylate-b-poly2-ethylhexyl acrylate-b-polymethyl methacrylate, and the like.

[0035] The acrylic pressure-sensitive adhesive may consist solely of the triblock copolymer described above, or may contain other components as appropriate. Components that may be blended into the acrylic pressure-sensitive adhesive include acrylic diblock copolymers, tackifiers, etc., from the viewpoints of having good compatibility with the triblock copolymer, improving uniformity, and obtaining a pressure-sensitive adhesive with superior heat resistance and weather resistance.

[0036] The acrylic diblock copolymer is a diblock copolymer represented by the general formula XY (wherein X represents a polymer block mainly composed of methacrylic acid alkyl ester units having an alkyl group with 1 to 4 carbon atoms or an alkyl group having a cyclic structure, and Y represents a polymer block mainly composed of acrylate alkyl ester units having an alkyl group with 1 to 20 carbon atoms and / or methacrylic acid alkyl ester units having an alkyl group with 5 to 20 carbon atoms). Preferably, the polymer block X is mainly composed of methacrylic acid alkyl ester units having an alkyl group with 1 to 4 carbon atoms, and the polymer block Y is mainly composed of acrylate alkyl ester units having an alkyl group with 1 to 20 carbon atoms.

[0037] In the polymer block X, examples of the alkyl group having 1 to 4 carbon atoms include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, a sec-butyl group, an isobutyl group, and a tert-butyl group. Examples of the alkyl group having a ring structure include a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, and an isobornyl group. These groups may have a substituent, and examples of the substituent include alkoxy groups such as a methoxy group, an ethoxy group, an n-propoxy group, an isopropoxy group, and a tert-butoxy group; amino groups such as an N,N-dimethylamino group and an N,N-diethylamino group; and halogen atoms such as chlorine, bromine, and fluorine.

[0038] Examples of monomers constituting methacrylic acid alkyl ester units having an alkyl group having 1 to 4 carbon atoms or an alkyl group having a cyclic structure include methyl methacrylate, ethyl methacrylate, isopropyl methacrylate, sec-butyl methacrylate, isobutyl methacrylate, tert-butyl methacrylate, cyclohexyl methacrylate, isobornyl methacrylate, 2-methoxyethyl methacrylate, 2-(N,N-dimethylamino)ethyl methacrylate, trifluoromethyl methacrylate, etc. These can be used alone or in combination of two or more.

[0039] The polymer block represented by X in the general formula may contain only methacrylic acid alkyl ester units, but may also contain other monomer units other than methacrylic acid alkyl ester units having an alkyl group having 1 to 4 carbon atoms or an alkyl group having a cyclic structure, as long as the amount is small enough not to impair efficacy (usually 20% by mass or less relative to the total amount of polymer block X). Examples of such other monomer units include methacrylic acid alkyl esters having 5 or more carbon atoms, such as 2-ethylhexyl methacrylate and dodecyl methacrylate; acrylic acid alkyl esters, such as methyl acrylate, n-butyl acrylate and t-butyl acrylate; methacrylic acid esters other than alkyl esters, such as trimethylsilyl methacrylate; acrylic acid esters other than alkyl esters, such as trimethylsilyl acrylate; methacrylamide, N-methylmethacrylamide, N-ethylmethacrylamide, N-isopropylmethacrylamide, N,N-dimethylmethacrylamide and N,N-diethylmethacrylamide. Examples of the monomers include acrylamides such as acrylamide, N-methylacrylamide, N-ethylacrylamide, N-isopropylacrylamide, N,N-dimethylacrylamide, and N,N-diethylacrylamide; vinyl monomers having a carboxyl group such as methacrylic acid, acrylic acid, crotonic acid, maleic acid, maleic anhydride, and fumaric acid; aromatic vinyl monomers such as styrene, α-methylstyrene, and p-methylstyrene; conjugated diene monomers such as butadiene and isoprene; olefins such as ethylene and propylene; and lactones such as ε-caprolactone and valerolactone.

[0040] In the polymer block Y, examples of the alkyl group having 1 to 20 carbon atoms include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, a 2-methylbutyl group, a 3-methylbutyl group, an n-octyl group, a 2-ethylhexyl group, an isononyl group, a dodecyl group, a tridecyl group, and a stearyl group. Examples of the alkyl group having 5 to 20 carbon atoms include an n-pentyl group, a 2-methylbutyl group, a 3-methylbutyl group, an n-octyl group, a 2-ethylhexyl group, a dodecyl group, and a stearyl group. These groups may have a substituent, and examples of such a substituent include alkoxy groups such as a methoxy group, an ethoxy group, an n-propoxy group, an isopropoxy group, and a tert-butoxy group; amino groups such as an N,N-dimethylamino group and an N,N-diethylamino group; and halogen atoms such as chlorine, bromine, and fluorine.

[0041] Examples of monomers constituting acrylate alkyl ester units having an alkyl group having 1 to 20 carbon atoms include methyl acrylate, ethyl acrylate, n-propyl acrylate, isopropyl acrylate, n-butyl acrylate, isobutyl acrylate, sec-butyl acrylate, tert-butyl acrylate, n-hexyl acrylate, 2-ethylhexyl acrylate, dodecyl acrylate, tridecyl acrylate, stearyl acrylate, 2-methoxyethyl acrylate, 2-(N,N-dimethylamino)ethyl acrylate, trifluoromethyl acrylate, trimethoxysilylpropyl acrylate, etc. These can be used alone or in combination of two or more.

[0042] Examples of monomers constituting methacrylic acid alkyl ester units having an alkyl group having 5 to 20 carbon atoms include n-pentyl methacrylate, n-hexyl methacrylate, 2-ethylhexyl methacrylate, dodecyl methacrylate, tridecyl methacrylate, stearyl methacrylate, 2-methoxypentyl methacrylate, 2-(N,N-dimethylamino)pentyl methacrylate, perfluoropentyl methacrylate, 2-trimethoxysilylpentyl methacrylate, etc. These can also be used alone or in combination of two or more.

[0043] The polymer block represented by Y in the general formula may contain only alkyl acrylate units having an alkyl group with 1 to 20 carbon atoms and / or alkyl methacrylate units having an alkyl group with 5 to 20 carbon atoms, but may contain other monomer units other than alkyl acrylate units having an alkyl group with 1 to 20 carbon atoms and / or alkyl methacrylate units having an alkyl group with 5 to 20 carbon atoms in a small proportion (20% by mass or less based on the total amount of polymer block Y) within a range that does not impair efficacy. Examples of such monomer units include alkyl acrylates having an alkyl group with 21 or more carbon atoms, alkyl methacrylates having an alkyl group with 1 to 4 carbon atoms, alkyl methacrylates having an alkyl group with 21 or more carbon atoms, methacrylic acid esters other than alkyl esters such as trimethylsilyl methacrylate, acrylic acid esters other than alkyl esters such as trimethylsilyl acrylate, methacrylamide, N-methylmethacrylamide, N-ethylmethacrylamide, N-isopropylmethacrylamide, N,N-dimethylmethacrylamide, and N,N-diethylmethacrylamide. Examples of suitable monomers include acrylamides, acrylamide, N-methylacrylamide, N-ethylacrylamide, N-isopropylacrylamide, N,N-dimethylacrylamide, and N,N-diethylacrylamide; vinyl monomers having a carboxyl group, such as methacrylic acid, acrylic acid, crotonic acid, maleic acid, maleic anhydride, and fumaric acid; aromatic vinyl monomers, such as styrene, α-methylstyrene, and p-methylstyrene; conjugated diene monomers, such as butadiene and isoprene; olefins, such as ethylene and propylene; and lactones, such as ε-caprolactone and valerolactone.

[0044] The diblock copolymer represented by the above general formula may have a functional group such as a hydroxyl group, a carboxyl group, an acid anhydride group, an amino group, or a trimethoxysilyl group in the molecular side chain or at the molecular main chain terminal, if necessary.

[0045] Furthermore, in order to improve and easily adjust tack, adhesive strength, and holding power, it is preferable to blend a tackifier into the acrylic adhesive. Examples of tackifiers that can be blended include rosin derivatives such as rosin ester, gum rosin, tall oil rosin, hydrogenated rosin ester, maleated rosin, and disproportionated rosin ester; terpene-phenolic resins; terpene-based resins mainly composed of α-pinene, β-pinene, and limonene; (hydrogenated) petroleum resins; coumarone-indene resins; hydrogenated aromatic copolymers; styrene-based resins; phenol-based resins; and xylene-based resins. These can be used alone or in combination of two or more.

[0046] The presence or absence of a diblock copolymer, a triblock copolymer, and a tackifier, and the blending ratio can be appropriately selected depending on the use of the adhesive product, the type of adherend, etc., and are not particularly limited.

[0047] The adhesive 12 may be an emulsion type adhesive or a hot melt type adhesive.

[0048] In the pressure-sensitive transfer adhesive tape 1 of this embodiment, the adhesive is not evenly applied to the entire surface of the substrate 11, commonly known as a "solid coating." Instead, a large number of adhesive blocks 122 are applied, each separated by gaps. Each adhesive block 122 has substantially the same shape and dimensions. The adhesive layer 12 is divided into a large number of adhesive blocks 122 by gaps in order to ensure good adhesive separation when the adhesive 12 is transferred and applied to the transfer surface of the adherend 0, and to allow for good air escape when the adhesive 12 is used to bond the adherend 0.

[0049] On the other hand, the presence of voids also means that the amount of adhesive 12 that can be applied per unit area to the transfer target surface is reduced. If the amount of adhesive 12 is reduced, the strength of the adhesive by the adhesive 12 may be weakened accordingly.

[0050] In order to enable the adhesive 12 to be properly and smoothly transferred from the tape substrate 11 to the transfer surface of the adherend 0, and to apply a necessary and sufficient amount of adhesive 12 to the transfer surface to firmly bond the adherend 0, in this embodiment, as shown in Figures 5 and 6, the shape of each adhesive block 122 is not a simple circular dot like in existing conventional products, but is shaped like a "lemon" with whiskers 14 protruding forward and backward from a circle 13. This narrows the area of ​​the voids in the adhesive layer 12 and increases the application area ratio, i.e., the ratio of the area of ​​the adhesive blocks 122 to the unit area of ​​the tape substrate 11 (= area occupied by adhesive blocks 122 / area of ​​tape substrate 11), thereby increasing the actual amount of adhesive applied to the transfer surface.

[0051] Figures 5 and 6 show the structure of the adhesive layer 12 of the pressure-sensitive transfer adhesive tape 1. Assuming that the substrate 11 of the pressure-sensitive transfer adhesive tape 1 is transparent, Figures 5 and 6 show the shape when viewed through the substrate 11 from the inner side that contacts the transfer head 33 (not contacting the surface to be transferred) toward the outer side that contacts the surface to be transferred (not contacting the transfer head 33). Furthermore, if the adhesive 12 is transferred from the substrate 11 of the pressure-sensitive transfer adhesive tape 1 to the surface to be transferred, a group of adhesive blocks 122 as shown in Figures 5 and 6 will appear on the surface to be transferred.

[0052] The vertical direction T in FIGS. 5 and 6 represents the longitudinal direction of the tape substrate 11, and the horizontal direction S, which is perpendicular to this, represents the transverse direction of the tape substrate 11. The stretching direction T is also the direction in which the adhesive blocks 122 are sequentially transferred to the target surface. A user who intends to transfer and apply the adhesive 12 to the target surface using the transfer tool 2 grasps the main case 4 of the transfer tool 2, presses the transfer head 33 around which the adhesive tape 1 is wrapped against the target surface, and then, in this state, pulls the transfer tool 2 along the target surface. If FIGS. 5 and 6 are likened to the target surface, the transfer head 33 rolls and displaces along the transfer direction T in the figures, i.e., from top to bottom, through the transfer operation performed by the user, and in the process, each portion of the adhesive tape 1 is sequentially pressed against the target surface. At the same time, the adhesive blocks 122 located higher in the figure are transferred first, and the adhesive blocks 122 located lower are transferred later (in other words, in order from the adhesive blocks 122 located higher in the figure).

[0053] The adhesive layer 12 supported on the substrate 11 of the pressure-sensitive transfer adhesive tape 1 is composed of strip-shaped adhesive portions 121, each of which is an aggregate of multiple adhesive blocks 122 arranged horizontally along the tape's short-dimension direction S, arranged in multiple stages along the transfer direction T. Between the multiple adhesive blocks 122 contained in one strip-shaped adhesive portion 121 and between the strip-shaped adhesive portions 121 in each stage, there are gaps where no adhesive is applied. In other words, the adhesive blocks 122 are backed by the substrate 11 while being almost or completely separated from one another by the gaps. In Figures 5 and 6, the adhesive blocks 122 coated with adhesive are indicated by halftone dots. The areas without halftone dots represent gaps where no adhesive is present.

[0054] Focusing on one adhesive block 122, the adhesive block 122 comprises a main adhesive region 13 and a small adhesive region 14 that is connected to the main adhesive region 13 and has a smaller area than the main adhesive region 13. As shown in Fig. 6, the main adhesive region 13 has a substantially circular shape as depicted by the dashed line in the figure. The outer edge of the main adhesive region 13, which is the majority of the outer edge of one adhesive block 122, is curved and has no clear corners.

[0055] The main adhesive regions 13 of two adhesive blocks 122 that belong to the same strip-shaped adhesive portion 121 and are adjacent in the short direction of the tape are almost or completely separated by a gap while they are on the tape substrate 11, i.e., before they are transferred to the target surface. However, as shown in Figure 6, before the adhesive blocks 122 are transferred onto the tape substrate 11, there may already be a region C where the main adhesive region 13 of one block 122 comes into contact or overlaps slightly with the main adhesive region 13 of another adjacent block 122. Furthermore, when the adhesive blocks 122 are transferred from the tape substrate 11 to the target surface, they may be pressed and deformed between the transfer head 33 and the target surface, resulting in the main adhesive regions 13 of the two adhesive blocks 122 partially overlapping and connecting with each other.

[0056] The extremely small adhesive region 14 protrudes from the main adhesive region 13 both to the front side (upper side in the figure; the side of the tape 1 that reaches the transfer head 33 earlier and is pressed against the surface to be transferred) and to the rear side (lower side in the figure; the side of the tape 1 that reaches the transfer head 33 later and is pressed against the surface to be transferred) along the transfer direction T. The extremely small adhesive region 14 has a tapered shape such that its width along the tape's short direction S decreases as it moves away from the main adhesive region 13. The outer edge of the extremely small adhesive region 14 is curved except for its tip, with no clear corners.

[0057] Regarding the shape of a single adhesive block 122, the outer edge of its main adhesive region 13 and the outer edge of its very small adhesive region 14 are smoothly continuous at the turning point P, and there is no clear corner between them.

[0058] 5 and 6, for the sake of simplicity, the direction of an axis parallel to a line segment connecting the tips of the front and rear minimal adhesive regions 14 of one adhesive block 122 is defined as the Y direction, and the direction of an axis perpendicular to the Y direction is defined as the X direction. The X direction is the direction in which a line segment connecting the tips of the minimal adhesive regions 14 protruding forward in each of the multiple adhesive blocks 122 belonging to the same strip-shaped adhesive portion 121 extends, the direction in which a line segment connecting the tips of the minimal adhesive regions 14 protruding rearward in each of the multiple adhesive blocks 122 belonging to the same strip-shaped adhesive portion 121 extends, or the direction in which a line segment connecting the centers of the main adhesive regions 13 of the multiple adhesive blocks 122 belonging to the same strip-shaped adhesive portion 121 extends.

[0059] As will be described later, the Y direction does not necessarily coincide perfectly with the transfer direction T, and the X direction does not necessarily coincide perfectly with the tape short dimension direction S, and in this embodiment, both are offset by a small angle θ. However, this does not prevent θ=0°, making the Y direction coincide with the transfer direction T, and the X direction coincide with the tape short dimension direction S.

[0060] On a virtual XY plane equivalent to the surface of the tape substrate 11 or the surface to be transferred, the outer edge of the main adhesive region 13, in its entirety or for the most part except for the vicinity of the turning point P, is a "convex curve" such as a substantially circular arc, a substantially elliptical arc, a substantially hyperbolic curve, a substantially parabolic curve, or the like. A convex curve is a curve that divides a plane into inside and outside and ensures that any line segment connecting any two points within the plane (i.e., the adhesive-coated region 13) is included within the curve.

[0061] Conversely, the outer edge of the minimal adhesive region 14 is made up of a pair of "concave curves" that are approximately symmetrical about the Y axis, such as an approximately circular arc, an approximately elliptical arc, an approximately hyperbolic curve, an approximately parabolic curve, or the like, and the tips of the pair of concave curves appear to approach each other. A concave curve is a curve that does not satisfy the above-mentioned conditions for a convex curve, that is, a curve that divides a plane into inside and outside and does not necessarily include a line segment connecting any two points within the plane (i.e., the adhesive-coated region 14).

[0062] The outer edges of one adhesive block 122, i.e., the outer edges of the main adhesive region 13 and the outer edges of the minimal adhesive region 14, are continuous so as to have the same tangent at the turning point P where they are continuous. If the outer edge of one adhesive block 122 is regarded as a function curve y=f(x) on the XY plane, the turning point P[x P ,y P ], that is, x=x P In this case, f(x) is differentiable with respect to x.

[0063] Furthermore, at the turning point P, the direction of the tangent to the outer edge of the main adhesive region 13 and the outer edge of the minimal adhesive region 14 of one adhesive block 122, or the degree of curvature of the outer edge, changes. If the first derivative of f(x) obtained by differentiating it once with respect to x is expressed as f'(x), and the second derivative of f(x) obtained by differentiating it twice with respect to x is expressed as f''(x), then at the turning point P, f''(x P )=0 and / or f'(x P )=0 holds. f''(x P ) = 0 is almost always an "inflection point." P ) = 0 and f'(x1) > 0 and f'(x2) < 0, or f'(x1) < 0 and f'(x2) > 0. Here, x1 ≒ x P ≒x2, x1 <x P , x P <x2である。f’(x P ) = 0 is a "stationary point." Stationary points are almost always extreme values ​​(maximum or minimum values), but "stationary inflection points (saddle points)" that are both stationary and inflection points are not extreme values.

[0064] 5 and 6, the minimal adhesive region 14 of each adhesive block 122 belonging to a certain strip-shaped adhesive portion 121 enters into the gap between the main adhesive regions 13 of two adjacent adhesive blocks 122 belonging to another strip-shaped adhesive portion 121 located ahead of or behind the strip-shaped adhesive portion 121. As depicted by the two-dot chain line in Fig. 6, a line segment extending in the X direction connecting the tips of the minimal adhesive regions 14 of multiple adhesive blocks 122 belonging to the same strip-shaped adhesive portion 121 passes over the main adhesive regions 13 of the adhesive blocks 122 belonging to the other strip-shaped adhesive portion 121.

[0065] The diameter of the main adhesive region 13, which is substantially circular in one adhesive block 122, is set to a value within the range of about 0.5 mm to about 2 mm, for example. Experimental testing has shown that products molded from adhesive blocks 122 with a large main adhesive region 13 diameter exceeding 2 mm suffer from significantly worse adhesive breakage when transferring the adhesive from the tape substrate 11 to the transfer target surface. One adhesive block 122 has two minimal adhesive regions 14, one at the front and one at the back, and the ratio α / β of the sum of the areas of these two minimal adhesive regions 14, α, to the area β of the main adhesive region 13 integrated with them, is found to be: When the diameter of the main adhesive area 13 is about 0.5 mm: about 0.035 When the diameter of the main adhesive area 13 is about 0.75 mm: about 0.046 When the diameter of the main adhesive area 13 is about 1 mm: about 0.054 When the diameter of the main adhesive area 13 is about 1.5 mm: about 0.065 When the diameter of the main adhesive area 13 is about 2 mm: about 0.071 Here, it is assumed that a gap with a width G of approximately 0.1 mm is provided between the outer edge of an adhesive block 122 belonging to one strip-shaped adhesive portion 121 and the outer edge of an adhesive block 122 belonging to another strip-shaped adhesive portion 121. In order to reduce the area of ​​the gap as much as possible to increase the density of the adhesive blocks 122 and still improve adhesive removal, it is preferable to set the diameter of the main adhesive region 13 to approximately 2 mm or less and / or set the ratio α / β of the area α of the minimal adhesive region 14 to the area β of the main adhesive region 13 to approximately 0.071 or less.

[0066] Next, focusing on the group of multiple adhesive blocks 122, in this embodiment, strictly speaking, the multiple adhesive blocks 122 belonging to the same strip-shaped adhesive portion 121 are not lined up horizontally along the tape short-dimension direction S. As shown in Figures 5 and 6, the X direction in which the multiple adhesive blocks 122 belonging to the same strip-shaped adhesive portion 121 are lined up is inclined at a small angle θ from the tape short-dimension direction S. Furthermore, the Y direction in which the multiple stages of strip-shaped adhesive portions 121 are arranged is also not completely aligned with the transfer direction T in which the tape substrate 11 extends, i.e., the direction in which the transfer head 33 moves relative to the adhesive tape 1 and the transfer target surface, because the Y direction is perpendicular to the X direction.

[0067] As already mentioned, Figures 5 and 6 show a group of adhesive blocks 122 transferred from the pressed tape substrate 11 to the transfer target surface as a result of pressing the transfer head 33 of the transfer tool 2 against the transfer target surface and pulling the transfer tool and its transfer head 33 from top to bottom in the figures, with the surface being regarded as the transfer target surface of the adherend 0. The transfer direction T coincides with the vertical direction in Figures 5 and 6, but the Y direction slopes slightly downward to the right in the figures. The tape short dimension direction S coincides with the horizontal direction in Figures 5 and 6, but the X direction is slightly biased counterclockwise therefrom.

[0068] 5 and 6, the strip-shaped adhesive portion 121 located higher is transferred to the transfer target surface first, and the strip-shaped adhesive portion 121 located lower is transferred to the transfer target surface last. Regarding the multiple adhesive blocks 122 constituting one strip-shaped adhesive portion 121, each adhesive block 122 is transferred to the transfer target surface generally simultaneously. However, to be precise, the adhesive block 122 located further left in the figure is transferred to the transfer target surface first, and the adhesive block 122 located further right is transferred to the transfer target surface last. This is because the X direction in which the adhesive blocks 122 are arranged is angled downward by an angle θ to the right with respect to the tape short-dimension direction S, which is perpendicular to the transfer direction T. The reason for this structure is that when a user holds the transfer tool in their right hand to perform the transfer operation, the adhesive can be more reliably transferred from the tape substrate 11 to the transfer target surface, and there is a tendency for adhesive to not remain on the tape substrate 11.

[0069] For one adhesive block 122, naturally, the tiny adhesive area 14 located at the top of the figure is transferred to the surface to be transferred first, then the main adhesive area 13 is transferred to the surface to be transferred, and finally the tiny adhesive area 14 located at the bottom of the figure is transferred to the surface to be transferred.

[0070] During the transfer operation, the pressure-contact area A, where the adhesive layer 12 on the tape substrate 11 is pressed against the transfer target surface by the transfer head 33, moves along the direction T relative to the adhesive tape 1 and the transfer target surface, from top to bottom in FIGS. 5 and 6 and from left to right in FIG. 3 . The transfer head 33 is cylindrical in side view, and the transfer target surface it contacts is often flat. Therefore, purely geometrically, the adhesive tape 1 wrapped around the transfer head 33 and the transfer target surface should be in line contact. However, in reality, at least one of the transfer target surface, adhesive block 122, tape substrate 11, and transfer head 33 elastically deforms (although the tape substrate 11 is likely made of a hard resin and therefore unlikely to undergo elastic deformation such that its thickness is compressed), and the pressure-contact area A expands to some extent along the transfer direction T, as shown in FIGS. 3 and 5 .

[0071] The X direction is inclined at an angle θ with respect to the tape short-dimension direction S, and the angle θ is set to a value that allows at least half of the area of ​​one strip-shaped adhesive portion 121 to simultaneously fit within the pressed-contact area A. More preferably, the angle θ is set to a value that allows the entire area of ​​one strip-shaped adhesive portion 121 to simultaneously fit within the pressed-contact area A. The multiple adhesive blocks 122 that make up one strip-shaped adhesive portion 121 may be pressed against each other during the transfer operation and may be connected to each other (particularly, their main adhesive regions 13), or may already be connected to each other when they are applied to the tape substrate 11 during the manufacturing process of the adhesive tape 1. In order to reliably transfer such a strip-shaped adhesive portion 121 to the transfer target surface without tearing it midway, it is important to avoid making the angle θ unduly large.

[0072] The angle θ is, for example, H≧h+wtanθ 5 and 6, h is the maximum dimension along the transfer direction T of the cross section of the adhesive 121 obtained by cutting one strip-shaped adhesive portion 121 along a line parallel to the transfer direction T, and w is the width of the tape substrate 11 along the tape short-dimension direction S.

[0073] According to the design dimensions of transfer tools currently in widespread use, the conditions under which θ is maximized are as follows: Tape width: approx. 6mm Adhesive dimension h: approx. 1.5 mm Dimension H of pressure contact area A: approx. 2.5 mm This becomes:

[0074] Here, w≈6 mm is the width of the narrowest typical adhesive tape, and h≈1.5 mm is the diameter of the largest typical circular dot pattern.

[0075] H≈2.5 mm is a value experimentally determined using a typical transfer tool 2 equipped with a transfer head 33 with an outer diameter D of approximately 4 mm. Specifically, a pigment such as vermilion ink was applied to the transfer head 33 of the transfer tool 2, which was a test sample, or the tape 1 (or tape substrate 11) wrapped around it, and a certain amount of load was applied to press it against a paper surface simulating the surface to be transferred. The size of the pigment that adhered to the paper surface (colored the paper surface) was measured as the dimension H of the pressed area A, and this was determined from the results. Three transfer tools 2 were used in the experiment, and measurements were taken three times for each individual, and the average of the maximum and minimum values ​​of the dimension H of the pressed area A measured three times was obtained. Load: Approx. 0.3 kg: Maximum: Approx. 1.63 mm, Minimum: Approx. 0.7 mm Load: Approx. 0.5 kg: Maximum: Approx. 1.59 mm, Minimum: Approx. 0.71 mm Load: Approx. 1 kg: Maximum value: Approx. 2.04 mm, Minimum value: Approx. 1.01 mm Load: Approx. 1.5 kg: Maximum: Approx. 2.40 mm, Minimum: Approx. 1.75 mm Load: Approx. 2 kg: Maximum value: Approx. 2.66 mm, Minimum value: Approx. 2.24 mm The dimension H of the pressure contact area A along the transfer direction T takes a value between approximately 20% and approximately 62.5% of the diameter of the transfer head. Under the above conditions, tan θ ≒ 0.167, and θ ≒ 9.55°. In light of this, it is possible to set 0° < θ < approximately 10°.

[0076] In the adhesive tape 1 of this embodiment, the pitch λ along the Y direction of the arranged strip-shaped adhesive portions 121 is, for example, about 1.415 mm when the diameter of the main adhesive region 13 of the adhesive block 122 is about 1.5 mm, and about 1.82 mm when the diameter of the main adhesive region 13 of the adhesive block 122 is about 2 mm. These pitches λ are smaller than the dimension H of the pressure-contact area A.

[0077] In this embodiment, the pressure-sensitive transfer adhesive tape 1 comprises a tape substrate 11 extending in a transfer direction T and an adhesive layer 12 having an adhesive coated on one surface of the tape substrate 11, and is configured so that each portion of the tape substrate 11 is pressed sequentially against the transfer target surface by a transfer head 33 that moves relatively in the transfer direction T, thereby sequentially transferring the adhesive 12 to the transfer target surface. The adhesive layer 12 has strip-shaped adhesive portions 121 and adhesive-free void portions arranged alternately in the transfer direction, and each strip-shaped adhesive portion 121 is inclined at a small angle θ with respect to the tape short-length direction S that is perpendicular to the transfer direction T. The small angle θ is set to a value such that, during the process of passing through a pressure contact area A where the adhesive layer 12 on the tape substrate 11 is pressed against the transfer target surface by the transfer head 33, more than half (particularly, the entirety) of the area of ​​one strip-shaped adhesive portion 121 can temporarily be contained within the pressure contact area A. According to this embodiment, it is possible to realize an adhesive tape 1 and a transfer tool 2 that can smoothly transfer an adhesive and are more user-friendly and convenient.

[0078] In particular, it is unlikely that a moment will occur in which only the gaps in the tape 1 supported by the transfer head 33, where no adhesive 12 is present, face the surface to be transferred, or a moment will occur in which the area of ​​the adhesive 12 in contact with the surface to be transferred becomes extremely small. Therefore, when a user performs a transfer operation by moving the transfer tool 2 relative to the surface to be transferred along the transfer direction T, it is unlikely that a rattling vibration will occur in which the transfer head 33 repeatedly approaches and moves away from the surface to be transferred, and it can be expected that the vibration will be less likely to be transmitted to the transfer tool 2 and further to the user's fingers.

[0079] Furthermore, the adhesive can be suitably transferred from the tape substrate 11 to the transfer target surface. That is, the risk of the adhesive not being properly transferred to the transfer target surface and remaining on the tape substrate 11 is further reduced, and the used portion of the tape substrate 11 can be wound onto the take-up reel 32 without leaving any adhesive behind. side edgeThe adhesive is pressed and transferred onto the transfer target surface in sequence from the left edge to the other edge (right edge). However, since there are gaps between the strip-shaped adhesive portions 121, adhesive removal is easy.

[0080] Furthermore, the adhesive further strengthens the effective (practical) adhesive strength of the adherend O. As an example, imagine a situation in which the flap of envelope O is to be attached to the body of envelope O. A user would typically slide transfer tool 2 along the width of envelope O to apply adhesive to the inner surface of the flap, which is the surface to be transferred. Then, when someone tries to peel the flap of envelope O from the body of envelope O along the width (from left to right or right to left), the areas with strong adhesive and areas with weak or no adhesive are clearly separated and not alternately continuous along the width of envelope O, which is the transfer direction T. Therefore, the flap of envelope O is firmly adhered to the body of envelope O, making it difficult to peel. Furthermore, when someone tries to peel it off, the flap and / or body of envelope O are likely to tear, leaving their surface layer on the recipient. In other words, the fact that someone has opened envelope O and evidence of this will undoubtedly remain. Of course, being able to firmly glue the flap of envelope 0 also means that envelope 0 can be kept securely closed even if it becomes thick or bulky due to the large amount of contents (paper sheets, etc.) inside it.

[0081] Each strip-shaped adhesive portion 121 is formed by arranging a plurality of adhesive blocks 122 in the same straight line. The adhesive blocks 122 may be partially in contact with each other or may be completely separated. In this embodiment, the adhesive blocks 122 are close to each other in the X direction and are spaced apart from each other in the Y direction. Each strip-shaped adhesive portion 121 may be formed by arranging the adhesive blocks 122 adjacent to each other with some overlapping.

[0082] Each gap formed between the strip-shaped adhesive portions 121 arranged along the transfer direction T is continuous from one edge (left end) to the other edge (right end) along the short dimension direction S of the tape substrate, which helps to further improve adhesive shedding.

[0083] In addition, in this embodiment, the pressure-sensitive transfer adhesive tape 1 is configured to include a tape substrate 11 extending in a transfer direction T and a plurality of adhesive blocks 122 formed by applying an adhesive to one surface of the tape substrate 11, and the adhesive 12 is transferred to the transfer target surface by sequentially pressing each portion of the tape substrate 11 against the transfer target surface by a transfer head 33, and the adhesive block 122 includes a main adhesive region 13 having no corners on its outer edge, and a minute adhesive region 14 having an area smaller than the main adhesive region 13 and integrally protruding from a part of the main adhesive region 13, and the minute adhesive region 14 of another adhesive block 122 is filled in a gap formed between the main adhesive regions 13 of adjacent adhesive blocks 122. Agent region 14 The pressure-sensitive transfer adhesive tape 1 is configured in which a plurality of adhesive blocks 122 are arranged with gaps between them so that the adhesive can penetrate through the gaps. According to this embodiment, the adhesive strength of the adhesive can be sufficiently strengthened while ensuring good adhesive removal during the transfer operation.

[0084] The minute adhesive regions 14 in the adhesive block 122 have a tapered shape, but conversely, this also means that the base portions that connect to the main adhesive regions 13 are wider. This ensures that when the adhesive block 122 is transferred from the tape substrate 11 to the target surface, the minute adhesive regions 14 and the main adhesive regions 13 are reliably transferred to the target surface without being torn apart, and prevents a portion of the adhesive block 122 from remaining on the tape substrate 11 without being transferred.

[0085] The minute adhesive regions 14 protrude forward (upward in FIGS. 5 and 6) from the main adhesive region 13 along the transfer direction. The minute adhesive regions 14 also protrude backward (downward in FIGS. 5 and 6) from the main adhesive region 13 along the transfer direction. This increases the application area rate, increases the density of the adhesive blocks 122, and sufficiently increases the amount of adhesive that can be applied per unit area, thereby strengthening the adhesive strength of the adhesive to the adherend 0.

[0086] The present invention is not limited to the above-described embodiments. For example, in the pressure-sensitive transfer adhesive tape 1 of the above embodiment, one strip-shaped adhesive portion 121 is composed of a plurality of divided adhesive blocks 122. However, as shown in FIG. 7, one strip-shaped adhesive portion 121 may be composed of a single continuous adhesive block 122.

[0087] In addition, the specific configuration of each part can be modified in various ways without departing from the spirit of the present invention. [Explanation of symbols]

[0088] 0...Substrate with transfer target surface (envelope) 1...Pressure-sensitive transfer adhesive tape 11...Tape substrate 12...Adhesive layer 121...Strip-shaped adhesive part 122...Adhesive block 13...Main adhesive area 14...Micro adhesive area 2...Transfer tool 33...Transfer head 31, 32, 41, 42, 43...Tape supply mechanism (feed reel, take-up reel, main wheel, sub-wheel, gear) A...Pressure welding area P...Tipping point S: Short direction of tape T...transcription direction θ…Small angle

Claims

1. A pressure-sensitive transfer adhesive tape; a transfer head that moves relative to a transfer target surface to sequentially press each portion of the pressure-sensitive transfer adhesive tape against the transfer target surface, thereby transferring the adhesive to the transfer target surface; a tape supply mechanism that sequentially supplies the pressure-sensitive transfer adhesive tape to the transfer head at a speed corresponding to the relative movement; A transfer tool comprising: The pressure-sensitive transfer adhesive tape includes a tape substrate stretching in a transfer direction and an adhesive layer having an adhesive coated on one surface of the tape substrate, and is configured such that the adhesive is sequentially transferred to the transfer target surface by the transfer head moving relatively in the transfer direction, whereby each portion of the tape substrate is sequentially pressed against the transfer target surface, the adhesive layer has strip-shaped adhesive portions and gap portions without adhesive alternately arranged in the transfer direction, and each strip-shaped adhesive portion is inclined at a small angle with respect to the tape short-dimension direction perpendicular to the transfer direction; the minute angle is set to a value such that more than half of the area of ​​one of the strip-shaped adhesive portions can be temporarily accommodated within a pressure contact area in a process in which the adhesive layer on the tape substrate passes through a pressure contact area where the adhesive layer is pressed against the transfer target surface by the transfer head; A transfer tool in which the dimension of the pressure contact area along the transfer direction is about 20% to about 62.5% of the diameter of the transfer head.

2. A pressure-sensitive transfer adhesive tape; a transfer head that moves relative to a transfer target surface to sequentially press each portion of the pressure-sensitive transfer adhesive tape against the transfer target surface, thereby transferring the adhesive to the transfer target surface; a tape supply mechanism that sequentially supplies the pressure-sensitive transfer adhesive tape to the transfer head at a speed corresponding to the relative movement; A transfer tool comprising: The pressure-sensitive transfer adhesive tape includes a tape substrate stretching in a transfer direction and an adhesive layer having an adhesive coated on one surface of the tape substrate, and is configured such that the adhesive is sequentially transferred to the transfer target surface by the transfer head moving relatively in the transfer direction, whereby each portion of the tape substrate is sequentially pressed against the transfer target surface, the adhesive layer has strip-shaped adhesive portions and gap portions without adhesive alternately arranged in the transfer direction, and each strip-shaped adhesive portion is inclined at a small angle with respect to the tape short-dimension direction perpendicular to the transfer direction; The minute angle is an angle θ relative to the tape short dimension direction. H≧h+w tan θ It is set to be (Note that h is the maximum dimension, along the transfer direction, of a cross section of the adhesive obtained by cutting one of the strip-shaped adhesive portions along a line parallel to the transfer direction, w is the width of the tape substrate along the tape short dimension direction, H is the dimension along the transfer direction of a pressure contact area where the adhesive layer on the tape substrate is pressed against the transfer target surface by the transfer head. A transfer tool in which the dimension H of the pressure contact area along the transfer direction is about 20% to about 62.5% of the diameter of the transfer head.

3. A pressure-sensitive transfer adhesive tape used in the transfer tool according to claim 1, The tape includes a tape substrate extending in a transfer direction and an adhesive layer having an adhesive coated on one surface of the tape substrate, and the adhesive is sequentially transferred to the transfer target surface by a transfer head that moves relatively in the transfer direction, and each portion of the tape substrate is sequentially pressed against the transfer target surface by the transfer head, the adhesive layer has strip-shaped adhesive portions and gap portions without adhesive alternately arranged in the transfer direction, and each strip-shaped adhesive portion is inclined at a small angle with respect to the tape short-dimension direction perpendicular to the transfer direction; the minute angle is set to a value such that more than half of the area of ​​one of the strip-shaped adhesive portions can be temporarily accommodated within a pressure contact area in a process in which the adhesive layer on the tape substrate passes through a pressure contact area where the adhesive layer is pressed against the transfer target surface by the transfer head; A pressure-sensitive transfer adhesive tape in which the dimension of the pressure-contact area along the transfer direction is about 20% to about 62.5% of the diameter of the transfer head.

4. A pressure-sensitive transfer adhesive tape used in the transfer tool according to claim 2, The tape includes a tape substrate extending in a transfer direction and an adhesive layer having an adhesive coated on one surface of the tape substrate, and the adhesive is sequentially transferred to the transfer target surface by a transfer head that moves relatively in the transfer direction, and each portion of the tape substrate is sequentially pressed against the transfer target surface by the transfer head, the adhesive layer has strip-shaped adhesive portions and gap portions without adhesive alternately arranged in the transfer direction, and each strip-shaped adhesive portion is inclined at a small angle with respect to the tape short-dimension direction perpendicular to the transfer direction; The minute angle is an angle θ relative to the tape short dimension direction. H≧h+w tan θ It is set to be (Note that h is the maximum dimension, along the transfer direction, of a cross section of the adhesive obtained by cutting one of the strip-shaped adhesive portions along a line parallel to the transfer direction, w is the width of the tape substrate along the tape short dimension direction, H is the dimension along the transfer direction of a pressure contact area where the adhesive layer on the tape substrate is pressed against the transfer target surface by the transfer head. A pressure-sensitive transfer adhesive tape in which the dimension H of the pressure-contact area along the transfer direction is about 20% to about 62.5% of the diameter of the transfer head.

5. A pressure-sensitive transfer adhesive tape comprising a tape substrate stretching in a transfer direction and an adhesive layer having an adhesive coated on one surface of the tape substrate, wherein the adhesive is sequentially transferred to the transfer target surface by sequentially pressing each portion of the tape substrate against the transfer target surface by a transfer head that moves relatively in the transfer direction, the adhesive layer has strip-shaped adhesive portions and gap portions without adhesive alternately arranged in the transfer direction, and each strip-shaped adhesive portion is inclined at a small angle with respect to the tape short-dimension direction perpendicular to the transfer direction; The minute angle is an angle θ relative to the tape short dimension direction. θ<about 10° This pressure-sensitive transfer adhesive tape is set to be

6. 6. The pressure-sensitive transfer adhesive tape according to claim 3, 4 or 5, wherein each of the band-shaped adhesive portions comprises a plurality of adhesive blocks arranged in the same straight line.

7. 6. The pressure-sensitive transfer adhesive tape according to claim 3, wherein each of the voids is continuous from one edge of the tape substrate to the other edge of the tape substrate in the shorter dimension direction.

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