Adhesive material

Abstract

To provide a new sticking material which is made into a defluorinated water repellent agent and is improved in both rewinding properties and hand cutting properties.SOLUTION: The patch material includes a support made of a woven fabric impregnated with a non-fluorine water repellent and a hard finishing agent, and an adhesive layer formed on at least one surface of the support and covering the entire surface. The support is composed of a woven fabric impregnated with a treatment liquid containing 0.5 to 5.0% by mass of a hydrocarbon-based non-fluorine water repellent and 5.7 to 12.0% by mass of a hard finishing agent, or a woven fabric impregnated with two liquids of a treatment liquid 1 containing 0.5 to 5.0% by mass of a hydrocarbon-based non-fluorine water repellent and a treatment liquid 2 containing 5.7 to 12.0% by mass of a hard finishing agent in no particular order.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a water-repellent adhesive patch that is easy to use, and particularly to a water-repellent adhesive patch that is used for taping tape applications. [Background technology]

[0002] Taping tape is known as a medical or sports adhesive material designed to fix soft biological tissues such as joints, muscles, ligaments, or tendons. Taping tapes are often made with cotton threads, taking into consideration their ability to fixate arms and legs, ease of tearing, and breathability. However, once cotton threads become wet with water from the outside, they tend to dry slowly, causing discomfort and becoming heavy due to moisture absorption, which can impair the user's experience. Therefore, techniques for imparting water repellency to substrates have been proposed. For example, Patent Document 1 proposes an adhesive material comprising a support treated with a fluorine-based resin-based water repellent and an adhesive layer. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-248182 Summary of the Invention [Problem to be solved by the invention]

[0004] Conventionally, as shown in Patent Document 1 and the like, fluorine-based water repellents have been widely used when imparting water repellency to a substrate because excellent performance can be obtained with a small amount. However, in recent years, restrictions have been imposed on the use of perfluorohexanoic acid (PFHxA) and its salts, as well as PFHxA-related substances, which are contained in fluorine-based water repellents. This has led to a demand for the development of substrates that use non-fluorine-based water repellents that do not contain these substances, as well as patches and tapes that use such substrates. However, patches with a substrate treated with a non-fluorine-based water repellent are less easy to tear by hand than patches with a substrate treated with a fluorine-based water repellent, and when rolled up, the force required to unravel (unwind) them is heavy, making the patches less user-friendly. Therefore, improving unwindability and ease of tearing by hand is an issue when transitioning to non-fluorine-based water repellents in patches.

[0005] An object of the present invention is to provide a new adhesive patch that does not contain a fluorine-based water repellent agent and has improved rewindability and hand tearability. [Means for solving the problem]

[0006] The present inventors have discovered that by employing a hydrocarbon-based water repellent as the non-fluorinated water repellent and combining this with a hard finishing agent, and by adjusting the hydrocarbon-based water repellent and hard finishing agent to specific concentrations in the treatment liquid used for the water repellent treatment of the substrate, an adhesive material can be obtained that not only satisfies basic performance requirements such as water repellency and overlapping ability (self-backside adhesive strength), but also has satisfactory rewindability and hand tearability, and that an adhesive material that is particularly useful as taping tape can be provided.

[0007] That is, the present invention is directed to the following patches. [1] An adhesive patch comprising a support made of a woven fabric impregnated with a treatment liquid containing a non-fluorinated water repellent and a hard finishing agent, and an adhesive layer formed on at least one surface of the support and covering the entire surface of said surface, wherein the treatment liquid contains 0.5 to 5.0 mass% of a hydrocarbon-based non-fluorinated water repellent and 5.7 to 12.0 mass% of a hard finishing agent. [2] An adhesive material comprising: a support made of a woven fabric impregnated with a treatment liquid 1 containing a non-fluorinated water repellent and a treatment liquid 2 containing a hard finishing agent, in any order; and a pressure-sensitive adhesive layer formed on at least one surface of the support and covering the entire surface of said surface, the treatment liquid 1 contains a hydrocarbon-based non-fluorinated water repellent agent in an amount of 0.5 to 5.0 mass %, The adhesive material, wherein the treatment liquid 2 contains 5.7 to 12.0% by mass of a hard finishing agent.

[0008] Furthermore, the present invention provides the following embodiments. [3] The adhesive material according to [1] or [2], wherein the unwinding force (pulling speed: 300 mm±30 mm / min) is 7.6 N / 25 mm or less. [4] The adhesive material according to [1] or [2], wherein the hardening agent is an acrylic hardening agent or a vinyl acetate hardening agent. [5] The adhesive material according to [1] or [2], wherein the adhesive layer contains a rubber-based adhesive. [6] The adhesive material according to [1] or [2], which is in a roll shape and is used as a taping tape. [7] A method for producing an adhesive material comprising a support made of a woven fabric impregnated with a non-fluorinated water repellent and a hardening agent, and a pressure-sensitive adhesive layer formed on at least one surface of the support and covering the entire surface, the method comprising the steps of: obtaining the support by impregnating the woven fabric with a treatment liquid containing 0.5 to 5.0 mass% of a hydrocarbon-based non-fluorinated water repellent and 5.7 to 12.0 mass% of a hardening agent; The process includes a step of impregnating a woven fabric with two liquids, namely, treatment liquid 1 containing 0.5 to 5.0 mass% of a hydrocarbon-based non-fluorinated water repellent and treatment liquid 2 containing 5.7 to 12.0 mass% of a hard finishing agent, in any order to obtain a support. Method for manufacturing adhesive patches. [Effects of the Invention]

[0009] The adhesive material of the present invention satisfies the requirements for water repellency and overlapping properties (adhesive strength on the back side), and also has excellent rewindability and hand tearability, making it possible to provide an adhesive material that is particularly suitable for use as a taping tape, etc. DETAILED DESCRIPTION OF THE INVENTION

[0010] Conventionally, water repellents, whether fluorine-based or non-fluorine-based, have been able to function satisfactorily for use in clothing, etc. However, as mentioned above, when a non-fluorine-based water repellent is used alone in adhesive tapes and other adhesive patches with the aim of eliminating fluorine, problems arise: the tape is difficult to tear by hand, and when the adhesive is in roll form, the force required to unravel (unwind) it becomes heavy, making the adhesive less user-friendly. In this study, we discovered that by adding a hardening agent together with a non-fluorine-based water repellent to the substrate treatment liquid, and by setting the concentrations of the water repellent and hardening agent within specific ranges, we can produce a taping tape that is both easy to unwind and easy to tear by hand. The present invention will be described in detail below.

[0011] [Adhesive material] The adhesive material of the present invention is a patch comprising a backing made of a woven fabric impregnated with a hydrocarbon-based non-fluorinated water repellent and a hardening agent, and an adhesive layer formed on at least one surface of the backing and covering the entire surface. The backing is made of a woven fabric impregnated with a treatment solution containing 0.5 to 5.0 mass% of a hydrocarbon-based non-fluorinated water repellent and 5.7 to 12.0 mass% of a hardening agent. Alternatively, the fabric is characterized by being impregnated in any order with two liquids: treatment liquid 1 containing 0.5 to 5.0 mass% of a hydrocarbon-based non-fluorinated water repellent agent, and treatment liquid 2 containing 5.7 to 12.0 mass% of a hard finishing agent. An adhesive material having the above-described configuration satisfies basic performance requirements such as anchoring strength with the substrate when submerged in water and adhesive strength on its back surface, and also has excellent unwindability when made into a tape form, and is also well-rated for ease of tearing by hand.

[0012] [Rewinding force] In the adhesive patch of the present invention, the unwinding force (pulling speed: 300 mm±30 mm / min) is 7.6 N / 25 mm or less, and can be, for example, 7.4 N / 25 mm or less, more preferably 7.0 N / 25 mm or less. If the unwinding force exceeds 7.6 N / 25 mm, when the adhesive patch is in roll form, a large force is required to peel (unwind) the rolled adhesive patch from the roll when using it, and there is a risk that it will be difficult to peel off easily with one hand, and there is a risk that usability will be impaired. The unwinding force in the present invention refers to the force exerted when unwinding a rolled tape at a low speed in accordance with the test method for adhesive tapes specified in JIS Z 0237. By providing the above-mentioned specified unwinding force, the adhesive patch of the present invention can be easily unrolled with one hand when used in a rolled form, thereby providing an adhesive patch with excellent usability.

[0013] An example of a specific test procedure for the unwinding force is as follows: First, a sample in the form of a roll of adhesive material is prepared by wrapping an adhesive material (width: 25 mm) around a paper tube (core) and rotating it. A cylindrical shaft is fitted into the hollow part of the core (cardboard tube) of this roll-type adhesive material, and both ends of the cylindrical shaft are supported by a metal frame so that it can rotate freely. The metal frame is fixed to one of the gripping tools of a tensile tester. The roll-type adhesive material is rewound (unwound) by hand by about 50 mm, and the tip of the rewound portion is fixed with the other gripping tool of the tensile tester and rewound (pulled) (by the tensile tester). The stress when pulled at a speed of 300 mm ± 30 mm / min is measured (unit: N / 25 mm). The test is performed three times, and the average unwinding force is calculated and used as the unwinding force of the adhesive material (unit: N / 25 mm). There is no particular restriction on the lower limit of the unwinding force for the adhesive patch of the present invention, but if it is too low, the adhesive patch in roll form may be unwound more than necessary when used, which may actually make it less convenient to use, so the lower limit can be set to, for example, 0.5 N / 25 mm or more.

[0014] [Easy to tear by hand] In this specification, the term "hand tearability" refers to the ability of the adhesive patch to be easily torn by hand in the longitudinal or transverse direction. The hand tearability can be evaluated by partially cutting the adhesive material by hand and checking the ease of cutting (good hand tearability) and the presence or absence of remaining threads (fraying) at the cut surface.

[0015] <Support> The patch of the present invention uses a support made of a woven fabric treated with a treatment liquid containing a non-fluorine-containing water repellent.

[0016] <Woven fabric> The material (fiber) constituting the woven fabric is not particularly limited, and may be cellulose-based fibers such as cotton, rayon, etc.; synthetic fibers such as polyester, polyamide, acrylic, polyurethane, polyethylene, polypropylene, etc.; and these materials may be used alone or in combination. Furthermore, elastic fibers, non-elastic fibers, or the like may be used. These can be used in combination.

[0017] As an example, from the viewpoints of flexibility, stretchability, ease of hand tearing, adhesiveness to the back surface, etc., it is preferable to use a woven fabric in which a composite yarn of cellulosic fiber and elastic fiber is arranged in some or all of the warp threads, or a woven fabric in which one S-twisted strong twisted yarn and one Z-twisted strong twisted yarn of cellulosic fiber are arranged alternately in the warp threads. Examples of the cellulosic fibers include cotton, viscose rayon, and polynosic fibers. The composite yarn of cellulose fiber and elastic fiber refers to a twisted yarn, covered yarn, core spun yarn, etc., of the cellulose fiber and an elastic fiber (e.g., polyether polyurethane fiber, polyester polyurethane fiber, synthetic rubber fiber). Among these composite yarns, a core spun yarn of cellulose fiber and polyether polyurethane fiber (a yarn in which cotton yarn is wrapped around polyurethane fiber, also known as "CSY (core spun yarn)") is preferred, but is not limited to this. The blend ratio of cellulose fiber and elastic fiber in the composite yarn can be, for example, 85 to 98 mass% of cellulose fiber, or 90 to 96 mass%. The weft of the woven fabric may be made of any fiber, such as so-called synthetic fibers, such as polyester fibers, polyamide fibers, and acrylic fibers; or cellulosic fibers, such as cotton and rayon.

[0018] For example, in the case of a woven fabric using core spun yarns for the warp, the warp yarns can be 8-60 count core spun yarns arranged at a density of 16-48 threads per inch, and the weft yarns can be 6-30 count cotton yarns arranged at a density of 40-80 threads per inch.The warp yarns can also be a combination of 8-60 count core spun yarns and 8-60 count 100% cotton yarns. For example, when 100% cotton yarn is used for both the warp and weft, the warp yarn can be made of cotton yarn count 8 to 60 arranged at a density of 40 to 90 threads per inch, and the weft yarn can be made of cotton yarn count 6 to 30 arranged at a density of 30 to 70 threads per inch. For use as a taping tape, it is preferable that the woven fabric be one-way stretchable rather than two-way stretchable in order to improve the immobilization of the arms and legs.

[0019] The woven fabric used can be one that stops stretching when stretched by hand in the longitudinal direction at 50 to 150% elongation, or one that stops stretching when stretched by 60 to 120%. "Strain limit" refers to a state in which, when the patch is strongly pulled by hand in the longitudinal direction, the patch reaches its stretch limit and cannot be stretched any further. The longitudinal length of the patch before stretching is defined as 100%, and this refers to the ratio (%) of the stretched length of the patch when it reaches its stretch limit to that length (before stretching). For example, a "strain limit" of 100% means that the patch has been stretched to twice the length of the patch before stretching, reaching its limit.

[0020] Furthermore, in order for a patch having a support made of a woven fabric treated with a treatment solution containing a non-fluorine-containing water repellent to have high water repellency, it is preferable that no openings formed between the threads are visible when the woven fabric (untreated) is held through light. However, it is also preferable that the area of ​​the openings is 0.3 mm 2 An opening of this size or smaller is considered to have no effect on water repellency, and therefore such a small opening may be acceptable.

[0021] The thickness of the woven fabric is not particularly limited, but from the viewpoint of flexibility and stretchability, it can be, for example, in the range of 100 μm to 10 mm, or 500 μm to 7 mm, or 1 to 5 mm. In particular, for adhesive materials for taping tapes, woven fabrics with a thickness in the range of 2 to 4 mm can be used. The thickness of the woven fabric can be adjusted by the thickness of the threads and the number of threads per thread.

[0022] The edges of the woven fabric may be treated to prevent fraying of the threads, or may be made thinner than the center of the fabric by applying heat or pressure, or may be subjected to processing such as lock stitching.

[0023] <Treatment of woven fabric with treatment liquid containing non-fluorine water repellent> The backing used in the patch of the present invention is a woven fabric impregnated with a non-fluorine water repellent and a hardening agent, which will be described later. The woven fabric may be impregnated with a treatment liquid (one liquid) containing the non-fluorine water repellent and the hardening agent, or may be impregnated with two liquids, treatment liquid 1 containing the non-fluorine water repellent and treatment liquid 2 containing the hardening agent, in any order. In consideration of the number of treatment steps, a preferred embodiment is one in which the woven fabric is impregnated with a treatment liquid (one liquid) containing the non-fluorine water repellent and the hardening agent.

[0024] In the present invention, a hydrocarbon-based water repellent is used as the non-fluorinated water repellent, specifically, a water-repellent hydrocarbon group-containing compound such as an aliphatic hydrocarbon, an aliphatic carboxylic acid, a polyolefin, a polyacrylic acid ester, or a polymethacrylic acid ester. Examples of the aliphatic hydrocarbons include paraffinic hydrocarbons and olefinic hydrocarbons, and examples of the aliphatic hydrocarbons include those having 12 or more carbon atoms. The aliphatic carboxylic acid may be either saturated or unsaturated, and examples thereof include aliphatic carboxylic acids having 12 or more carbon atoms, and may also be esterified products of aliphatic carboxylic acids. Examples of the polyolefin include polyethylene, polypropylene, and ethylene-propylene copolymers. The polyacrylic acid ester and polymethacrylic acid ester preferably have a hydrocarbon group having 12 to 24 carbon atoms connected via an ester bond. The hydrocarbon group may be linear or branched, may be a saturated or unsaturated hydrocarbon, and may have an alicyclic or aromatic ring. Of these, linear groups are preferred, and linear alkyl groups are more preferred. The acrylic acid ester or methacrylic acid ester monomer in such a polymer may account for 80 to 100% by mass of the total amount of monomer units constituting the polymer.

[0025] The hydrocarbon-based non-fluorinated water repellent can be a commercially available product, and examples thereof include, but are not limited to, Mayshield (registered trademark) Z-1, Z-71, Z-210, P-350K, and P-700 manufactured by Meisei Chemical Industry Co., Ltd.; Neoseed (registered trademark) NR-90, NR-158, NR-7080, NR-7200, and TH-44 manufactured by Nicca Chemical Co., Ltd.; and Unidyne (registered trademark) XF-5001, XF-5002, and XF-5005 manufactured by Daikin Corporation.

[0026] Hard finishing agents are a general term for processing agents that give fibers a hard texture. Examples of hard finishing agents that can be used include synthetic resins such as melamine resins, polyester resins, polyamide resins, acrylic resins, vinyl acetate resins, polyvinyl alcohol resins, urethane resins, fluorine resins, silicone resins, and olefin resins, as well as starch. At least one of these can be used in the form of a liquid (emulsion or solution) obtained by dispersing or dissolving the resin in water or a solvent. In the present invention, acrylic hard finishing agents such as acrylic resin emulsions or vinyl acetate hard finishing agents such as vinyl acetate resin emulsions can be suitably used. These acrylic hard finishing agents and vinyl acetate hard finishing agents are commercially available, for example, Banstar (trade name) series manufactured by Chubu Saiden Co., Ltd., and Vinyblanc manufactured by Nissin Chemical Industry Co., Ltd. (trade name) series manufactured by Miki Riken Kogyo Co., Ltd.; Riken Resin (trade name) series, Rikensol (trade name) series manufactured by Union Chemical Industry Co., Ltd.; and the like, but are not limited to these.

[0027] The treatment liquid used for the impregnation treatment of the woven fabric can be in the form of an aqueous solution obtained by diluting the non-fluorinated water repellent (hydrocarbon-based water repellent) and / or the hard finishing agent with a solvent such as water or a water-alcohol, preferably water (purified water, industrial water, etc.). In the case of a one-component treatment liquid containing a non-fluorinated water repellent and a hard finishing agent, for example, the concentration of the non-fluorinated water repellent (solid content) is 0.5 to 5.0 mass %, and the concentration of the hard finishing agent (solid content) can be 5.7 to 12 mass %. Furthermore, when two components are used, namely treatment liquid 1 containing a non-fluorinated water repellent and treatment liquid 2 containing a hard finishing agent, the concentration of the water repellent (solid content) in treatment liquid 1 containing the non-fluorinated water repellent can be 0.5 to 5.0 mass %, and the concentration of the hard finishing agent (solid content) in treatment liquid 2 containing the hard finishing agent can be 5.7 to 12 mass %.

[0028] The impregnation treatment of a woven fabric may be performed by treating the knitted fabric with the treatment liquid containing the hydrocarbon-based non-fluorinated water repellent and / or the hard finishing agent using a pad nip method, spray method, coating method, kiss roll method, or the like. For example, when treating using the pad nip method, specifically, the woven fabric is immersed in the treatment liquid at a temperature of 4 to 30°C, e.g., 5 to 25°C, or at room temperature, for an appropriate period of time (impregnation treatment), and then the excess liquid is squeezed out and the fabric is dried at a temperature of 130°C or higher, preferably 130 to 200°C, to obtain a support made of a woven fabric impregnated with the non-fluorinated water repellent and hard finishing agent. When the woven fabric is impregnated with two liquids, treatment liquid 1 containing the non-fluorinated water repellent and treatment liquid 2 containing the hard finishing agent, the order of use of the two liquids is not particularly limited. For example, the fabric may be impregnated with one treatment liquid and dried, and then impregnated with the other treatment liquid and dried, following the procedure shown in the example of the pad nip method described above.

[0029] As mentioned above, when a non-fluorine-based water repellent is used to treat a substrate, satisfactory performance cannot be achieved in terms of hand tearability and rewindability. In response to this, the inventors have combined this with a hard finishing agent, thereby making it possible to improve both performances. However, as will be shown in the results of the Examples described later, if the amount of hard finishing agent is not appropriate, the hand-tearability may be satisfactory but the unwinding force may be too great, resulting in poor usability, or conversely, the unwinding force may be appropriate but the hand-tearability may be poor. Therefore, it is important to use the non-fluorine-based water repellent and hard finishing agent in combination within the appropriate range. For example, if the concentration of the non-fluorine-based water repellent agent is less than 0.5% by mass, the desired effect may not be obtained and the water repellent treatment (impregnation treatment with the treatment liquid) may not be stable, while if it is more than 5.0% by mass, the hand tearability may be deteriorated. Furthermore, if the concentration of the hard finishing agent is less than 5.7% by mass, there is a risk that the ease of hand tearing may deteriorate or that the force required to unwind may increase, and if it is more than 12% by mass, the support may become too hard, which may cause problems in the manufacturing process of the patch or may lead to an uncomfortable feeling when applied as a patch.

[0030] <Other processing, etc.> The backing of the patch of the present invention may contain, as needed, commonly used additives such as ultraviolet absorbers, antibacterial agents, antioxidants, fillers, pigments, fragrances, colorants, flame retardants, antistatic agents (anionic surfactants, cationic surfactants, nonionic surfactants), penetrating agents that promote penetration of the treatment solution into the backing, etc. These additives may be blended into the fibers that form the woven fabric, or may be added to the treatment solution when the woven fabric is surface-treated, or may be applied to the woven fabric, and are used in normal amounts depending on the type, as long as they do not impair the breathability of the patch. The backing of the patch of the present invention may be impregnated with a synthetic resin that has affinity and adhesiveness for the woven fabric.

[0031] <Adhesive layer> The adhesive layer formed on at least one surface of the support can be formed using adhesives such as (natural / synthetic) rubber-based adhesives, acrylic-based adhesives, urethane-based adhesives, silicone-based adhesives, polyvinyl alcohol-based adhesives, polyamide-based adhesives, etc. These adhesives may be used alone or in combination of two or more. Among these, a rubber-based adhesive having sufficient adhesiveness to the skin surface can be used.

[0032] Examples of rubber-based adhesives include those obtained by adding a tackifying resin (tackifier) ​​such as a rosin-based resin, a terpene-based resin, a terpene-phenol-based resin, a coumarone-indene resin, or a petroleum-based resin (aliphatic hydrocarbon resin, aromatic hydrocarbon resin) to a rubber-like elastomer such as natural rubber, polyisobutylene (PIB), polybutene, polyisoprene, styrene-isoprene-styrene block copolymer (SIS), styrene-butadiene copolymer (SBR), styrene-butadiene-styrene block copolymer (SBS), styrene-ethylene-butylene-styrene block copolymer (SEBS), styrene-ethylene-propylene-styrene block copolymer (SEPS), or a hydrogenated version of the above SBR, or a mixture of two or more of these.

[0033] The rubber-based adhesive may contain, as necessary, additives that are typically incorporated into adhesive layers, such as fillers (titanium oxide, zinc oxide, etc.), softeners (liquid butadiene rubber, liquid isoprene rubber, liquid styrene butadiene rubber, mineral oil, etc.), plasticizers, antioxidants (antioxidants, antiaging agents), ultraviolet absorbers, colorants, and fragrances. For example, relative to 100 parts by mass of the rubber-based adhesive, these can be added in proportions such as 60 to 130 parts by mass of tackifier, 15 to 45 parts by mass of softener, 20 to 80 parts by mass of filler, and 0.01 to 10 parts by mass of other additives.

[0034] In the adhesive patch of the present invention, the adhesive layer is adjacent to the support and formed on at least one surface of the support so as to cover the entire surface of that surface. In conventional adhesive patches comprising a support and an adhesive layer, the adhesive layer may not be formed on the entire surface of the support, but may be formed in a partial pattern such as a lattice, stripes, or dots, if necessary or desired. However, in the adhesive patch of the present invention, when the adhesive layer is adjacent to the support and formed on at least one surface of the support so as not to cover the entire surface of that surface, water may infiltrate or penetrate from the area not covered by the adhesive layer, which may reduce the waterproofness of the adhesive patch. The pressure-sensitive adhesive layer may be configured to consist of a single pressure-sensitive adhesive layer, or may be configured to have a plurality of pressure-sensitive adhesive layers laminated together. When the pressure-sensitive adhesive layer is configured to have a plurality of pressure-sensitive adhesive layers laminated together, different types of pressure-sensitive adhesive layers may be laminated together. The thickness of the pressure-sensitive adhesive layer can usually be set to 10 μm to 200 μm, for example, 20 μm to 100 μm.

[0035] The pressure-sensitive adhesive layer can also be provided on both sides of the support as needed. When pressure-sensitive adhesive layers are provided on both sides of the support, the pressure-sensitive adhesive layer provided on the side of the support that does not come into contact with the skin may be formed thinner than the pressure-sensitive adhesive layer provided on the side that usually comes into contact with the skin, and may be formed over the entire surface of the support, or may be formed partially (patterned) in a lattice, stripe, dotted, or other pattern. By providing the pressure-sensitive adhesive layer on the side that does not come into contact with the skin in the center or edge of the support, the adhesiveness of the back surface itself can be improved.

[0036] <Removal material> The release material is provided for the purpose of protecting the adhesive layer until immediately before the patch is used, and embodiments in which such a release material is provided can also be included in the patch of the present invention. The release material can be any of those commonly used in the technical fields of adhesive tapes and patches (adhesive materials). For example, paper substrates such as fine paper and glassine paper, plastic films (resin films) such as polyester (polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyethylene naphthalate, etc.), release-processed paper or release-processed film obtained by coating these paper substrates or resin films with a release agent having release properties such as silicone resin or fluororesin, laminated paper obtained by laminating these films, and laminated release-processed paper obtained by coating the laminated paper with a release agent, etc., can be used. The thickness of the release liner is not particularly limited, but is usually in the range of 10 μm to 1 mm, for example, 20 μm to 500 μm, and preferably 40 μm to 200 μm. 2 or 60-100g / m 2 It can be about. The amount of release agent applied during the release treatment is usually 0.1 to 10 g / m 2 The release treatment (mold release treatment) of the release material can be performed not only on the surface that contacts the adhesive layer, but also on the surface opposite the adhesive layer. In addition, one or both surfaces of the release material may be provided with an uneven shape to make it easier to remove the patch from the packaging material. The shape of the release material can be selected appropriately to match the shape of the patch, and its size can be the same as or slightly larger than the size of the support in the patch, and the corners can be rounded if desired. The release material may be composed of a single sheet or multiple divided sheets, and the cuts may be straight, wavy, or perforated, and the release materials may partially overlap each other.

[0037] <Method of manufacturing adhesive patches> The adhesive patch of the present invention can be manufactured by following the manufacturing method of conventional adhesive patches (adhesive patches). For example, an adhesive layer is first formed by coating one surface of the support with an adhesive, and if necessary, a release material is further laminated on the adhesive layer to form the adhesive patch. Specifically, for example, a pressure-sensitive adhesive layer can be formed by applying a solution or emulsion of an adhesive to a processing paper coated with a silicone-based release agent or the like, and then laminating the adhesive layer and a support to produce a patch in the form of a pressure-sensitive adhesive tape. The processing paper is a general term for paper or film used during the manufacturing process that does not remain in the product, and the films and papers exemplified above under "release material" can be used here. When the patch of the present invention further comprises a release material, a release material may be further laminated on the pressure-sensitive adhesive layer, or the release-treated processing paper may itself be used as the release material.

[0038] As described above, the adhesive patch of the present invention may further comprise a release material if necessary and may be provided as a sheet-shaped adhesive patch, or may be wound up into a roll and provided as a roll-shaped adhesive patch. The roll-shaped adhesive material may be in the form of an adhesive material with a release material wound into a roll, but because the adhesive material of the present invention has excellent adhesive strength on its back surface, it can also be in the form of a roll-shaped adhesive material without a release material by sequentially winding adhesive materials without a release material onto the back surface of the adhesive material to form a roll. When a release material is provided, the release material may be divided into two or more pieces to make it easier to peel off, or may have multiple slits in the width direction.

[0039] <Taping tape> The adhesive material of the present invention, particularly the roll-shaped adhesive material, has excellent backside adhesive strength and hand tearability, and can achieve an appropriate unwinding force, so it can be suitably used as a taping tape. Therefore, an adhesive material in a roll shape that is used as a taping tape, i.e., a taping tape formed from the adhesive material of the present invention, is also within the scope of the present invention. The taping tape of the present invention is suitable for use in sports that are performed for the purposes of injury prevention, first aid, and recurrence prevention. The present invention can also be used in the fields of sports taping, medical taping for preventing or relieving various pains such as lower back pain, sudden lower back pain, joint pain due to injury, pain from hallux valgus, etc. The taping tape of the present invention can also be used as an auxiliary means for rehabilitation, supporting the injured area during the functional recovery phase and relieving pain. [Example]

[0040] EXAMPLES The present invention will be specifically explained below with reference to examples and comparative examples, but the present invention is not limited to these examples.

[0041] [Example 1] The woven fabric used to form the support was a woven fabric (hereinafter referred to as "woven fabric a") in which the warp threads were 40 count 100% cotton yarns arranged at a density of 70 threads / inch and the weft threads were 20 count 100% cotton yarns arranged at a density of 38 threads / inch. A support treatment liquid was prepared by diluting Mayshield (registered trademark) Z-210 manufactured by Meisei Chemical Industry Co., Ltd. as hydrocarbon-based water repellent A at a concentration of 2.3 mass%, Vinyblanc GV6181 manufactured by Nissin Chemical Industry Co., Ltd., a vinyl acetate-based resin emulsion, as vinyl acetate-based hard finishing agent A at a concentration of 5.8 mass%, and penetrant (isopropanol) at a concentration of 1.5 mass% with industrial water. After immersing the woven fabric a in the treatment liquid at room temperature, excess liquid was squeezed out and the fabric was dried at a maximum temperature of 180°C for 3 to 4 minutes to obtain a support made of woven fabric treated with a hydrocarbon-based water repellent.

[0042] The adhesive (rubber-based) described in Table 2, which had been coated on a process paper, was applied to one side of the support in an amount of 80 g / m2 after drying. 2 The adhesive layer was formed by transfer coating so that the adhesive layer had the following properties, and the adhesive material of Example 1 was obtained.

[0043] [Examples 2, 6, and 7, and Comparative Examples 1 to 4] The adhesive materials of Examples 2, 6, and 7, and Comparative Examples 1 to 4 were obtained in the same manner as in Example 1, except that in the treatment solution for woven fabric a, the concentrations of the hydrocarbon-based water repellent and the vinyl acetate-based hard finishing agent A were changed to the concentrations shown in Table 3.

[0044] [Examples 3 to 5, 8, Comparative Examples 5 to 8] The woven fabric used to form the support was a woven fabric (hereinafter referred to as "woven fabric b") in which the warp yarns were 40-count cotton yarns and 40-count cotton core spun yarns with a polyurethane fiber core (1 cotton core spun yarn was used for every 2 cotton yarns) arranged at a density of 62 threads per inch, and the weft yarns were 16-count 100% cotton yarns arranged at a density of 48 threads per inch. The adhesive materials of Examples 3 to 5 and 8 and Comparative Examples 5 to 7 were obtained in the same manner as in Example 1, except that Meisei Chemical Industry Co., Ltd.'s Mayshield (registered trademark) P-350K was used as the hydrocarbon water repellent B instead of the hydrocarbon water repellent A, and Chubu Saiden Co., Ltd.'s Banstar S-18, an acrylic resin emulsion, was used as the acrylic hard finishing agent B instead of the vinyl acetate hard finishing agent A, and the concentrations of the hydrocarbon water repellent B and the acrylic hard finishing agent B in the treatment solution for woven fabric b were changed to the concentrations listed in Table 3. In addition, a patch of Comparative Example 8 was obtained using the same procedure as in Example 1, except that no hard finishing agent was used and the concentration of hydrocarbon-based water repellent B in the treatment liquid for woven fabric b was changed to the concentration shown in Table 3.

[0045] [Reference examples 1 and 2] Instead of hydrocarbon-based water repellents, AG-E550D, a fluorine-based water repellent manufactured by AGC Corporation, was used, and instead of vinyl acetate-based hard finishing agent A, Banstar S-18, an acrylic resin emulsion manufactured by Chubu Saiden Co., Ltd., was used as acrylic hard finishing agent B. The adhesive materials of Reference Examples 1 and 2 were obtained using the same procedure as in Example 1, except that in the treatment solution for woven fabric b (Reference Example 1) or woven fabric a (Reference Example 2), the concentrations of the fluorine-based water repellent and the acrylic hard finishing agent B were changed to the concentrations shown in Table 3.

[0046] [Table 1] [Table 2]

[0047] The patches of Examples 1 to 8, Comparative Examples 1 to 7, and Reference Examples 1 and 2 were subjected to various evaluation tests according to the following procedures. The results are shown in Table 3.

[0048] [Rewinding force] The unwinding force of the adhesive patch was measured in accordance with the low-speed unwinding force specified in JIS Z 0237. Specifically, a roll of adhesive material with a paper tube as the core was prepared (width 25 mm). A cylindrical shaft was fitted into the hollow part of the core (cardboard tube) of the roll-type adhesive material, and both ends of this cylindrical shaft were supported by a metal frame so that it could rotate freely. The metal frame was fixed to one of the gripping tools of a tensile tester. The roll-type adhesive material was manually unwound (unwound) by about 50 mm, and the tip of the unwound roll-type adhesive material was fixed with the other gripping tool of the tensile tester. The roll-type adhesive material was unwound (pulled) at a pulling speed of 300 mm ± 30 mm / min so that the angle between the unwound adhesive material and the roll surface was perpendicular, and the stress at this time (unwinding force: unit: N / 25 mm) was measured (average value of N = 3). The measurement atmosphere was a temperature of 23 ± 2 °C and a relative humidity of 50 ± 5%. The unwinding force was evaluated as ◯ when it was 7.6 [N / 25 mm] or less, and as × when it was more than 7.6 [N / 25 mm].

[0049] [Easy to tear by hand] The above-mentioned roll-shaped adhesive material was partially unwound and cut by hand to evaluate the ease of cutting (ease of hand-tearability), and the presence or absence of remaining threads (fraying) on ​​the cut surface was checked, and the hand-tearability was evaluated according to the following evaluation criteria (N=6). Good: Excellent hand tearability (easy to tear by hand), no threads left behind (fraying) on ​​the cut surface ×: Poor hand tearability (requires a lot of force to cut by hand or is difficult), threads remain (frayed) on the cut surface

[0050] [Flood anchoring power] From the adhesive material samples of each example produced, test pieces were cut into strips measuring 100 mm in the length direction and 25 mm in the width direction to serve as test pieces for measuring anchoring force. The adhesive surface of the test piece was attached to the adhesive surface of cloth tape No. 13 (with separator) (manufactured by Nichiban Co., Ltd.), and a 5 kg pressure roller was used to press the test piece back and forth once at a speed of 300 mm / min. The pressed sample (a sample having a laminated structure of cloth tape and anchoring force measurement test piece) was left for 20 minutes or more. The sample was then immersed in a thermostatic water bath at 45°C for 30 minutes, and the anchoring strength test piece was then peeled off from Cloth Tape No. 13 at a peel angle of 90° and a peel speed of 300 mm / min, and the 90° peel strength (water-immersed anchoring strength, unit: N / 25 mm) of the anchoring strength test piece against the adhesive surface of Cloth Tape No. 13 was measured (average value of N=3). The measurement atmosphere was a temperature of 23±2°C and a relative humidity of 50±5%. In this test, if the water immersion anchoring force is 9.8 [N / 25mm] or more, it can be evaluated as having sufficient water immersion anchoring force for practical use (sufficient anchoring force even when the patch is submerged in water).

[0051] [Self-back adhesive strength] The adhesive strength of the adhesive patch on its back surface was measured according to the 180° peeling method specified in JIS Z 0237. Specifically, two test pieces were cut into strips measuring 100 mm in the length direction and 25 mm in the width direction from the adhesive material sample of each example produced, and designated as test pieces 1 and 2. Test piece 1 was attached to a Bakelite board (phenolic resin board, manufactured by Sumitomo Bakelite Co., Ltd., PL-1102), and then the other test piece 2 was attached and overlapped approximately on top of the center of test piece 1, leaving the edge of test piece 2 unattached. Next, a 2 kg rubber roll was pressed against test piece 2, leaving the edge, and then reciprocated once at a speed of 300 mm / min. After 20 minutes had passed, the pressed sample (a sample having a laminated structure of Bakelite plate-test piece 1-test piece 2) was peeled from test piece 1 using an Instron tensile tester at a peel angle of 180° and a peel speed of 300 mm / min, and the 180° peel strength (self-backside adhesive strength, unit: N / 25 mm) of test piece 2 against test piece 1 was measured (average value of N=3). The measurement atmosphere was a temperature of 23±2°C and a relative humidity of 50±5%. In this test, if the adhesive strength on the back side is 2.9 [N / 25 mm] or more, it can be evaluated as having sufficient adhesive strength on the back side for practical use.

[0052] [Table 3]

[0053] As shown in Table 3, the adhesive patches of Examples 1 to 8, which had a support (woven fabric) treated with a treatment solution containing 0.5 to 5.0 mass% of a hydrocarbon-based water repellent and 5.7 to 12.0 mass% of a hardening agent, had an unwinding force of 7.6 N / 25 mm or less, and also had good hand-tearability (easily torn by hand, with no remaining threads on the cut surface), regardless of the type of hardening agent, and all performances were rated as ○. All of the adhesive patches of these Examples had a water penetration anchoring force of 9.8 [N / 25 mm] or more and a self-backing adhesive strength of 2.9 [N / 25 mm] or more, confirming that they had sufficient water penetration anchoring force and self-backing adhesive strength for practical use.

[0054] On the other hand, the adhesive materials of Comparative Examples 1 to 7, in which the content of the hard finishing agent was less than 5.7% by mass, had an unwinding force of more than 7.6 N / 25 mm (rating: ×), and were therefore poorly tearable by hand (a large force was required to cut by hand, and threads remained on the cut surface) (rating: ×). Furthermore, the adhesive patch of Comparative Example 8, which contained more than 5.0% by mass of water repellent agent, had poor hand tearability. Furthermore, if the content of the water repellent agent is less than 0.5% by mass, the water repellent treatment (impregnation treatment with the treatment liquid) is unstable, and if the content of the hard finishing agent is more than 12% by mass, the support becomes too hard, resulting in problems when manufacturing it into an adhesive material or when using it for subsequent testing.

[0055] As shown in the results of the Examples above, it has been confirmed that the adhesive patch of the present invention, which uses a woven fabric impregnated with a treatment solution containing a hydrocarbon-based non-fluorinated water repellent and a hard finishing agent in specific proportions, can realize an adhesive patch that exhibits excellent rewindability and hand tearability, and is particularly useful for taping tape applications.

Claims

1. The adhesive patch comprises a support made of a woven fabric impregnated with a treatment liquid containing a non-fluorinated water repellent and a hard finishing agent, and a pressure-sensitive adhesive layer formed on at least one surface of the support and covering the entire surface of said surface, wherein the treatment liquid contains 0.5 to 5.0% by mass of a hydrocarbon-based non-fluorinated water repellent and 5.7 to 12.0% by mass of a hard finishing agent.

2. An adhesive material comprising: a support made of a woven fabric impregnated with a treatment liquid 1 containing a non-fluorinated water repellent and a treatment liquid 2 containing a hard finishing agent, in any order; and a pressure-sensitive adhesive layer formed on at least one surface of the support and covering the entire surface of said surface, the treatment liquid 1 contains a hydrocarbon-based non-fluorinated water repellent agent in an amount of 0.5 to 5.0 mass %, The adhesive material, wherein the treatment liquid 2 contains 5.7 to 12.0% by mass of a hard finishing agent.

3. The unwinding force (pulling speed: 300 mm ± 30 mm / min) is 7.6 N / 25 mm or less, The adhesive material according to claim 1 or 2.

4. The hard finish is an acrylic hard finish or a vinyl acetate hard finish. The adhesive material according to claim 1 or 2.

5. The adhesive material according to claim 1 or 2, wherein the adhesive layer comprises a rubber-based adhesive.

6. 3. The adhesive material according to claim 1 or 2, which is in the form of a roll and is used as a taping tape.

7. A method for producing an adhesive material comprising a support made of a woven fabric impregnated with a non-fluorinated water repellent and a hardening agent, and a pressure-sensitive adhesive layer formed on at least one surface of the support and covering the entire surface, the method comprising the steps of: obtaining the support by impregnating the woven fabric with a treatment liquid containing 0.5 to 5.0 mass% of a hydrocarbon-based non-fluorinated water repellent and 5.7 to 12.0 mass% of a hardening agent; The method includes a step of impregnating a woven fabric with two liquids, namely, a treatment liquid 1 containing 0.5 to 5.0 mass % of a hydrocarbon-based non-fluorinated water repellent and a treatment liquid 2 containing 5.7 to 12.0 mass % of a hard finishing agent, in any order to obtain a support. Method for manufacturing adhesive patches.

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