JP2011000166A - Air-permeable adhesive tape - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air-permeable adhesive tape which has the great ability to ensure adhesion between a woven fabric and an adhesive agent layer, can restrain the adhesion from deteriorating due to contact with perspiration, water, and the like, and has other outstanding abilities.SOLUTION: The air-permeable adhesive tape includes a base material and the adhesive agent layer. The base material is the woven fabric in which the warp in which polyurethane yarn as core yarn is covered with synthetic fiber yarn and the weft in which the synthetic fiber yarn as the core yarn is covered with cotton yarn are plain-woven.

Description

The present invention relates to a breathable pressure-sensitive adhesive tape.

In general, an adhesive tape used for medical use, sports use or the like has a configuration in which an adhesive layer is formed on one side of a base material made of paper, cloth, plastic film or the like. For example, medical adhesive tapes are used for fixing absorbent cotton, gauze, bandages, shipping agents, etc. to human skin, and sports tapes are mainly used for fixing, compressing, and protecting affected areas. . In recent years, adhesive tapes called kinesiology tapes that can improve blood and lymph circulation, support movement of muscles and joints, and relieve epidermal tension have also been used.

The general structure of a kinesiology tape as an example of an adhesive tape has a three-layer structure of woven fabric / adhesive layer / release paper. The woven fabric includes warp yarn covered with a cotton yarn as a core yarn and a polyurethane yarn. A plain weave with cotton weft has been proposed. By sticking the longitudinal direction of the kinesiology tape (having elasticity) along the muscle flow, it can be expected to relieve pain and stiffness, improve blood flow, and prevent injury during exercise.

However, such a general kinesiology tape absorbs cotton yarn due to sweating or contact with water, etc., so the adhesive strength of the tape (particularly the adhesive strength on the back of the tape) is greatly reduced and the tape tends to peel off. There is.

Moreover, although various proposals are made as an adhesive tape (for example, Patent Documents 1 to 4), a detailed examination of a base material (woven fabric or the like) has not been made here. Furthermore, there are problems such as a decrease in adhesive force due to perspiration and contact with water, and adhesive residue is likely to occur due to low adhesion between the substrate and the adhesive layer.

JP-A 61-284252 JP-A-6-200220 Japanese Patent Laid-Open No. 6-166853 Japanese Patent Application Laid-Open No. 8-175799

In view of the above-described situation, the present invention has excellent adhesion between a woven fabric and an adhesive layer, and at the same time, can suppress a decrease in adhesive force due to contact with sweat or water, and has excellent breathability in other performances. The object is to provide an adhesive tape.

The present invention is a breathable pressure-sensitive adhesive tape having a base material and an adhesive layer, wherein the base material is covered with a warp yarn covered with a synthetic fiber yarn using a polyurethane yarn as a core yarn and a cotton yarn using a synthetic fiber yarn as a core yarn. A breathable pressure-sensitive adhesive tape characterized in that a woven fabric in which a weft that has been ringed is a plain weave.
The pressure-sensitive adhesive layer is preferably obtained by using a pressure-sensitive adhesive composition containing an acrylic pressure-sensitive adhesive, a water-absorbing polymer compound and a hydrophobic organic solvent.
The breathable pressure-sensitive adhesive tape is preferably a kinesiology tape.

Since the breathable pressure-sensitive adhesive tape of the present invention has the above-described configuration, it can suppress a decrease in the adhesive strength of the tape due to perspiration or contact with water, and at the same time, obtain good adhesion between the woven fabric and the pressure-sensitive adhesive layer. Is also possible. Furthermore, since functions can be easily imparted by various additives such as water repellents and antibacterial agents, functions such as water repellency and antibacterial properties can also be imparted.

It is an example of the schematic diagram which showed the structure of the air-permeable adhesive tape of this invention. It is an example of the schematic diagram which showed the product which wound up the air permeable adhesive tape of the structure shown by FIG. 1 in roll shape.

Hereinafter, the present invention will be described in detail.
In the breathable pressure-sensitive adhesive tape of the present invention, a woven fabric in which warp yarn covered with a synthetic fiber yarn as a core yarn and weft yarn covered as a core yarn with a cotton yarn as a core yarn is used as a base material. Is done.

As mentioned above, in general kinesiology tapes using plain woven fabrics of warp and cotton weft covered with cotton yarn as the core yarn, the adhesive force decreases due to contact with moisture, etc., making it easy to peel off For this reason, it is conceivable to use synthetic fiber yarns such as polyester that hardly absorb water instead of cotton yarns. However, a tape based on a woven fabric using such synthetic fiber yarn has poor adhesion between the woven fabric and the pressure-sensitive adhesive layer, and is likely to have adhesive residue.

On the other hand, in the present invention, as the warp yarn, a polyurethane yarn (core yarn) covered with a synthetic fiber yarn is used, so that water absorption is suppressed and even if sweating or contact with water occurs. Adhesive strength can be maintained. In addition, the use of a synthetic fiber yarn (core yarn) covered with cotton yarn as the weft makes it easier for the adhesive to penetrate between the fibers of the woven fabric, resulting in an anchoring effect. Property is improved. By the above actions, it is possible to achieve both high adhesion between the woven fabric and the adhesive layer, which are difficult to achieve at the same time, and suppression of decrease in adhesive force due to perspiration and contact with water.

The warp yarn of the woven fabric is a polyurethane yarn used as a core yarn and covered with a synthetic fiber yarn (a covering yarn in which a synthetic fiber yarn is spirally wound around a polyurethane yarn).
The warp polyurethane yarn is an elastic yarn composed of polyester polyurethane or polyurethane urea, polyether polyurethane or polyurethane urea, and other organic synthetic resin bodies are combined or mixed with the polyurethane or polyurethane urea. An elastic yarn or the like may be used.

The warp synthetic fiber yarn is not particularly limited, and polyester, polyacrylonitrile, polyamide fiber and the like can be used, but polyester fiber is particularly preferable from the viewpoint of price and dimensional stability.

The weft of the woven fabric is a synthetic fiber yarn covered with a cotton yarn as a core yarn (a covering yarn in which a cotton yarn is wound in a spiral shape around the synthetic fiber yarn).
The synthetic fiber yarn of the said weft is not specifically limited, The thing similar to the synthetic fiber yarn used for the said warp can be used.

In the above weft yarn, the mixing ratio of the synthetic fiber yarn and the cotton yarn is preferably in the range of 95: 5 to 30:70, more preferably in the range of 80:20 to 50:50 in terms of mass ratio. When the mixing ratio of the cotton yarn is too small, the anchoring effect cannot be obtained, the adhesiveness with the pressure-sensitive adhesive is lowered, and various additives (such as antibacterial agent and water repellent) are difficult to permeate and it is difficult to impart functions. . When it is too much, there is a possibility that the tape adhesive force may be reduced due to water absorption.

The number of single yarns, the cross-sectional shape, etc. of the polyurethane yarn and synthetic fiber yarn used as the warp and weft are not particularly limited. For example, the yarn may be a monofilament composed of one single yarn or a multifilament composed of a plurality of single yarns. The cross-sectional shape of the yarn may be circular or flat.

Further, the covering yarn used as warp and weft may be spirally wound (SCY: single covered yarn), or spirally wound twice (DCY: double Covered yarn) or a three-fold wound may be used.
Furthermore, the covering yarn can also be used as a composite yarn by blending with other known fibers, twisting or the like, as long as the effects of the present invention are not impaired.

Basis weight of the woven fabric is preferably 10 to 500 g / ^{m 2,} and more preferably 20 to 200 g / ^{m 2.} If it is less than 10 g / m ² , the eyes become rough, and the adhesive may be easily exposed through bonding. If it exceeds 500 g / m ² , the eyes become too dense and the adhesive may not be sufficiently penetrated.

The woven fabric (base material) is preferably water-repellent. Thereby, even when sweating or water coming into contact with the adhesive tape when used by being attached to human skin, water absorption to the woven fabric is prevented by the water repellent finish. For this reason, the adhesive force of a tape can be maintained favorable at the time of sticking.

It does not specifically limit as a method to perform the said water-repellent processing, It can carry out by a conventionally well-known method. For example, a method of spraying an aqueous solution of water repellent on a woven fabric, a method of impregnating (dipping) a woven fabric into an aqueous solution of a water repellent, or a partially impregnated bath (bath) containing an aqueous solution of a water repellent. The water repellent is adhered to the constituent fibers of the woven fabric by a roller coating method or the like that imparts a water repellant to the woven fabric by rotating the arranged roller while moving the woven fabric in contact with the roller. be able to.

The water repellent is not particularly limited as long as it is capable of imparting water repellency. Fluorine water repellent, silicon water repellent, wax water repellent, zirconium water repellent, ethylene Examples thereof include urea water repellents, methylolamide water repellents, pyridinium salt water repellents, and the like. Of these, wax-based water repellents are preferable, and paraffin wax is particularly preferable. In this case, the adhesiveness with the pressure-sensitive adhesive layer can be improved, and a decrease in the adhesive strength due to sweating or contact with water can be prevented. Moreover, the outstanding air permeability and moisture permeability can be maintained.

Examples of the wax water repellent include natural wax such as petroleum wax and synthetic wax such as polyethylene wax. Examples of the petroleum wax include paraffin wax. The paraffin wax is a wax that is solid at normal temperature and is produced by a petroleum refining process. Usually, the main component is a linear paraffinic hydrocarbon having 20 to 40 carbon atoms and a small amount of branched paraffin. Usually, it has a property of melting at a temperature of 40 to 100 ° C. The paraffin wax preferably has a molecular weight of 300 to 550. The said water repellent may be used independently and may use 2 or more types together.
The drying temperature of the woven fabric to which the water repellent is adhered by the method described above is preferably 60 to 160 ° C. and the drying time is preferably 1 to 600 seconds.

The woven fabric (base material) is preferably subjected to antibacterial processing. Thereby, since excellent antibacterial properties can be imparted to the breathable pressure-sensitive adhesive tape, for example, when it is applied to human skin for a long period of time, it is possible to prevent the generation of malodor and the adverse effect on the skin due to the proliferation of resident skin bacteria. Examples of the antibacterial agent include inorganic antibacterial agents and organic antibacterial agents.

Examples of the inorganic antibacterial agents include metals such as silver, zinc, copper, titanium, and molybdenum; these metal ions are converted into silica, zeolite, synthetic zeolite, zirconium phosphate, calcium phosphate, zinc calcium phosphate, ceramic, alumina silicon, and titanium. Examples include those supported on inorganic fine particles such as zeolite, apatite, and calcium carbonate; those obtained by laminating or coating the surface of inorganic compound particles with other inorganic oxides, composite oxides, etc. by a sol-gel method. .

Examples of the organic antibacterial agents include chitin, chitosan, wasabi and mustard extracts, hinokitiol, tea extracts and other natural products, allyl isothiocyanate, polyoxyalkylene trialkyl ammonium, benzalkonium chloride, hexamethylene biguanide hydrochloride Quaternary ammonium salts such as organic silicon quaternary ammonium salts, benzalkonium chloride, phenylamide compounds, biguanide compounds, sulfoisophthalic acid tetraalkylphosphonium salts or diesters thereof, alcohols such as ethanol and isopropanol, benzoic acid Acid, benzoates, salicylic acid, salicylates, phenol, sorbic acid and its salts, dehydroacetic acid and its salts, paraoxybenzoate (paraben), polylysine or polylysine salt, ammonium base, Suhoniumu bases, sulfonium bases, phenylamide group, and a polymer compound having antimicrobial activity group such as biguanide groups in the main chain or side chain. Especially, it is preferable to use a biguanide antibacterial agent.

The antibacterial processing method is not particularly limited as long as it is a method that can be included in the base material. For example, in addition to the water repellent, in addition to the water repellent, the water repellent processing of the woven fabric with the water repellent Examples thereof include a method of performing the above water-repellent processing and antibacterial processing after adding an antibacterial agent.

For example, when long fiber yarns such as polyester fibers are used as the base material, various additives such as water repellents and antibacterial agents are difficult to penetrate and it is difficult to impart a function to the base material. Because we use warp which covered yarn (core yarn) with synthetic fiber yarn, and we use woven fabric that weaved plain yarn which covered synthetic fiber yarn (core yarn) with cotton yarn as base material The penetration of the additive can be ensured, and a desired function can be imparted.

The breathable pressure-sensitive adhesive tape of the present invention has a pressure-sensitive adhesive layer. The said adhesive layer can be formed using the adhesive composition containing an adhesive. As said adhesive layer, what is obtained using the adhesive composition containing an acrylic adhesive, a water absorbing polymer compound, and a hydrophobic organic solvent is preferable. By having the woven fabric (base material) and the pressure-sensitive adhesive layer formed of the pressure-sensitive adhesive composition, excellent breathability and moisture permeability can be expressed. For this reason, it is possible to satisfactorily prevent skin respiration inhibition, skin stuffiness and blurring. Moreover, it becomes possible to maintain favorable adhesive force.

The acrylic pressure-sensitive adhesive is a pressure-sensitive adhesive containing an acrylic polymer.
Examples of the acrylic polymer include a homopolymer of (meth) acrylic acid alkyl ester, a copolymer thereof, or a copolymer of (meth) acrylic acid alkyl ester and a copolymerizable monomer. Can do.

Examples of the (meth) acrylic acid alkyl ester include esters obtained from primary to tertiary alcohols having 2 to 18, preferably 4 to 12 carbon atoms of an alkyl group, and acrylic acid or methacrylic acid. Can do. Specific examples include methyl (meth) acrylate, isopropyl (meth) acrylate, butyl (meth) acrylate, isobutyl (meth) acrylate, hexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, and the like.

The copolymerizable monomer has at least one unsaturated double bond involved in the copolymerization reaction in the molecule, and has a functional group such as a carboxyl group, a hydroxyl group, a sulfoxyl group, an amino group, and an amide group. The monomer which has in a side chain can be mentioned. These may be used alone or in combination of two or more.

The water-absorbing polymer compound may be one that absorbs water from several hundred times its own weight and swells, does not dissolve, and does not release the absorbed water even when pressure is applied to the swollen material. If it does not specifically limit. For example, a sodium polyacrylate compound, polyethylene glycol, polypropylene glycol, polyvinyl alcohol, cellulose ester, polyamide, polyvinyl pyrrolidone, etc. can be mentioned. Of these, a sodium polyacrylate compound, polypropylene glycol, and polyethylene glycol are preferable, and a sodium polyacrylate compound and polypropylene glycol are particularly preferable. Thereby, excellent processability, air permeability, and safety can be obtained, and it is also relatively inexpensive. Furthermore, excellent air permeability and moisture permeability can be obtained and good adhesive strength can be maintained.

The above water-absorbing polymer compound absorbs water, so that uniform air-permeable pores are obtained in the pressure-sensitive adhesive layer. Therefore, water is usually added as the pressure-sensitive adhesive composition used to form the pressure-sensitive adhesive layer. Or a water-absorbing polymer compound that absorbs water is used.
In the pressure-sensitive adhesive composition, the content of the water-absorbing polymer compound is preferably 0.1 to 5 parts by mass with respect to 100 parts by mass of the acrylic pressure-sensitive adhesive (solid content).

It does not specifically limit as said hydrophobic organic solvent, A conventionally well-known thing can be used, For example, ethyl acetate, toluene, hexane, mineral oil, petroleum ether etc. can be mentioned. Of these, ethyl acetate and toluene are preferable from the viewpoints of drying conditions of the pressure-sensitive adhesive (which affects air permeability) and cost.

The pressure-sensitive adhesive layer preferably contains an antibacterial agent. Thereby, propagation of skin resident bacteria can be suppressed favorably.
The antibacterial agent is not particularly limited, and the same antibacterial agent can be used. Of these, inorganic antibacterial agents are preferable, and silver antibacterial agents are particularly preferable. Thereby, while improving the antibacterial property of a breathable adhesive tape, the outstanding safety, heat resistance, and workability can also be acquired.

When the pressure-sensitive adhesive layer contains a silver-based antibacterial agent, the pressure-sensitive adhesive layer preferably further contains an alkyl ether phosphate or a salt thereof. Thereby, since a silver type antimicrobial agent can be disperse | distributed uniformly in an adhesive layer, it becomes possible to exhibit favorable antimicrobial property. The method of blending the alkyl ether phosphate ester and its salt is not particularly limited, but it is preferable to use a silver antibacterial agent made into a paste using an alkyl ether phosphate ester or salt thereof. Thereby, precipitation of the silver-type antibacterial agent at the time of mixing | blending an adhesive composition can be prevented, and an antibacterial agent can be disperse | distributed uniformly in an adhesive layer. Of these, alkyl ether phosphates are preferred.

Although it does not specifically limit as said alkyl ether phosphate ester or its salt, The compound (alkyl phosphate ester, polyoxyalkylene alkyl ether phosphate ester, its salt) represented by a following formula is preferable. The said compound can be obtained by phosphoric acid esterification reaction of alcohol or polyoxyalkylene alkyl ether.

In the formula, R is the same or different and represents a hydrophobic group of a general surfactant such as an alkyl group or alkenyl group having 1 to 26 carbon atoms, or a phenyl group, a benzyl group, a cresyl group, or a naphthyl group. R is preferably an alkyl group or an alkenyl group. 1-18 are preferable and, as for carbon number of said R, 4-18 are more preferable. AO represents an oxyalkylene group having 2 to 4 carbon atoms, and is preferably an oxyethylene group. a is preferably 0 to 50, more preferably 0 to 30, and particularly preferably 0 to 20. b represents an integer of 1 to 3. M is the same or different and represents a hydrogen atom, an alkali metal, an alkaline earth metal, an ammonium group, or a mono, di, or trialkyl (carbon number 2 to 5) ammonium group that may be substituted, A hydrogen atom is preferred.

The pressure-sensitive adhesive composition preferably contains a curing agent. As the curing agent, known ones can be used, but an isocyanate curing agent is preferable.
In the pressure-sensitive adhesive layer, additives such as known plasticizers, softeners, fillers, tackifiers and the like can be appropriately blended as necessary.

The pressure-sensitive adhesive layer can be formed by, for example, dissolving or dispersing a pressure-sensitive adhesive, and if necessary, other components in an organic solvent, applying the obtained composition to one side of a substrate, and drying. Moreover, it can also apply | coat to the single side | surface of the separator layer mentioned later, and can also form it by drying. Weight of the pressure-sensitive adhesive layer (after drying) is preferably 10~90g / ^{m 2,} and more preferably 30~70g / ^{m 2.}

The breathable pressure-sensitive adhesive tape is used immediately before application to the skin surface for the purpose of preventing the adhesive layer from adhering to equipment, containers, etc. during manufacture, transportation and storage, and preventing deterioration of the tape. Until then, it is preferable to cover and protect the exposed surface of the pressure-sensitive adhesive layer with a separator layer. In this case, the breathable pressure-sensitive adhesive tape has a structure in which a base material, a pressure-sensitive adhesive layer, and a separator layer are laminated in this order. At the time of use, the separator layer is peeled off to expose the surface of the pressure-sensitive adhesive layer, which is used after being attached to the skin.

The separator layer is not particularly limited as long as it can be easily peeled off from the pressure-sensitive adhesive layer at the time of use. For example, a peeling treatment can be performed by applying a silicone resin, a fluororesin, or the like on the surface in contact with the pressure-sensitive adhesive layer. Examples thereof include films such as applied polyester, polyvinyl chloride, polyvinylidene chloride, and polyethylene terephthalate, high-quality paper, paper such as glassine paper, and high-quality paper or laminated film of glassine paper and polyolefin.

The breathable pressure-sensitive adhesive tape preferably has an air permeability of 20 cm ³ / cm ² · s or more according to JIS L1096A method (Fragile tester). Thereby, it can suppress that skin irritation occurs because there is too little air permeability. The air permeability is a value calculated by sucking from one of the test pieces having a unit area (125 Pa) and measuring the amount of air passing therethrough.

The breathable pressure-sensitive adhesive tape preferably has a pressure-sensitive adhesive strength (vs. glass) according to JIS Z0237 of 4.0 to 8.0 N / 25 mm. If it is within the above range, it can be used by being well applied to human skin. “Adhesive strength according to JIS Z 0237 (vs. glass)” is an adhesive strength measured by the 180-degree peeling method specified in JIS Z0237 except that a glass plate is used instead of a SUS304 steel plate as a test plate. (23 ± 2 ° C., relative humidity 50 ± 5%).

The breathable pressure-sensitive adhesive tape having the air permeability and the adhesive strength within the above ranges is appropriately selected from woven fabrics constituting the base material, and a pressure-sensitive adhesive composition containing an acrylic pressure-sensitive adhesive, a water-absorbing polymer compound, and a hydrophobic organic solvent. It can be manufactured by a technique such as using a product. In addition, the said air permeability and adhesive force are values measured using the tape (there is no separator layer) which consists of a base material and an adhesive layer.

The breathable pressure-sensitive adhesive tape of the present invention can be suitably used as a muscle / joint support tape and a blood circulation promoting tape. More specifically, it can be suitably used as a kinesiology tape.

The above kinesiology tape is a tape used for the natural therapy “kinesio taping method” based on kinesiology (a study that specializes in the study of muscle motor functions related to body movement based on medicine). Tape. The above kinesiology tape has a certain degree of elasticity and adhesiveness that fits the body. It can be applied to painful or stiff areas to promote human natural healing power and relieve or cure disorders. It is.

Specifically, the kinesiology tape has the following effects (1) to (3).
(1) Improvement of blood / lymph fluid circulation (Skin is lifted by tape and blood / lymph fluid circulation is improved, so that metabolism is activated, fatigue recovery is accelerated, and muscle fatigue is reduced.)
(2) Supports movement of muscles and joints (tape lifts the skin and smoothes the movement of muscles. Stretch also supports the movement of muscles and smoothes the movement of joints.)
(3) Relieve the tension of the epidermis (appropriate irritation is given to the skin by elasticity, and the tension of the epidermis is relieved)

The breathable pressure-sensitive adhesive tape of the present invention can be produced by a conventionally known production method, and examples thereof include the following methods. First, the pressure-sensitive adhesive composition is applied to one side of the separator layer and dried to form a pressure-sensitive adhesive layer. After attaching the pressure-sensitive adhesive layer formed on the separator layer and the woven fabric (base material), the breathable pressure-sensitive adhesive tape is manufactured by performing steps such as cutting and winding up as necessary. Is done.

In the production of the above breathable pressure-sensitive adhesive tape, the adhesive layer and the woven fabric are bonded to each other by reducing the viscosity of the pressure-sensitive adhesive layer (pressure-sensitive adhesive composition) by heating, and both sides of the tape (both sides of the separator layer and the woven fabric). It is preferable to carry out while applying pressure. Thereby, since an adhesive composition can be penetrated into the inside of the space | gap of a woven fabric, a favorable anchoring effect is acquired and the adhesiveness of a woven fabric and an adhesive layer can be improved.

The heating temperature of the pressure-sensitive adhesive composition is preferably in the range of 40 to 100 ° C. By adjusting within this range, the anchoring effect is promoted and good adhesion can be obtained.

An example of a schematic view of the breathable pressure-sensitive adhesive tape of the present invention is shown in FIGS.
FIG. 1 is a schematic view showing a configuration of a breathable pressure-sensitive adhesive tape (kinesiology tape) according to the present invention, in which a substrate 1 (woven fabric), an adhesive layer 2 and a separator layer 3 are laminated. . FIG. 2 is a schematic view showing a product obtained by winding the breathable pressure-sensitive adhesive tape having the above configuration into a roll shape.

EXAMPLES Hereinafter, although an Example is hung up and demonstrated in more detail, this invention is not limited only to these Examples. In the examples, “parts” and “%” mean “parts by mass” and “% by mass” unless otherwise specified.

Example 1 Production of Kinesiology Tape The woven fabric was a warp yarn covered with a polyester yarn using polyurethane yarn (40 denier) as a core yarn, and a weft yarn covered with a cotton yarn using a polyester yarn as a core yarn (mixing ratio: A plain weave of 65% polyester and 35% cotton yarn was used. As the woven fabric (base material), a liquid dyeing machine which was circulated in a solution of 3% paraffinic water repellent and 1.5% biguanide antibacterial, water repellent and antibacterial processed was used. The elongation at break was about 80%. The warp and weft (covering yarn) used for the woven fabric is SCY (single covered yarn).

20 parts by mass of ethyl acetate, 40 parts by mass of toluene, 100.0 parts by mass of acrylic adhesive, 1.0 part by mass of water-absorbing polymer compound, 20 parts by mass of ion-exchanged water, 3.0 parts by mass of isocyanate curing agent, silver 0.1 parts by mass of an antibacterial agent was mixed to obtain an adhesive solution having a viscosity of 5000 cps. This pressure-sensitive adhesive solution was applied to the silicon surface of single-sided polylamination release paper with a comma coater, the solvent was dried at a temperature gradient of 50 to 140 ° C., and then bonded to a woven fabric (base material) to obtain a sample.

The weight of the pressure-sensitive adhesive layer after drying was 57 g / m ² . In addition, at the time of bonding, the formed pressure-sensitive adhesive layer (pressure-sensitive adhesive composition) is heated at 60 ° C., and is applied while applying pressure from both sides of the release paper and the woven fabric, and the pressure-sensitive adhesive composition reaches the inside of the void of the woven fabric I got things in. The silver antibacterial agent used was pasted using an alkyl ether phosphate.

The commercial products used are as follows.
Paraffinic water repellent: “TH-44” (Nichika Chemical)
Acrylic adhesive: “Cybinol AT-1104 (manufactured by Seiden Chemical)”
Water-absorbing polymer compound: “Aronbis S” (manufactured by Nippon Pure Chemicals, sodium polyacrylate)
Isocyanate curing agent: “Takenate B-830” (manufactured by Mitsui Takeda Chemical),
Silver antibacterial agent: “Zeomic AW10N” (Sinenen)

Example 2
A sample was prepared in the same manner as in Example 1 except that the mixing ratio of the weft of the woven fabric was changed to polyester yarn (95%) / cotton yarn (5%).

Example 3
A sample was prepared in the same manner as in Example 1 except that the mixing ratio of the weft of the woven fabric was changed to polyester yarn (30%) / cotton yarn (70%).

Example 4
A sample was prepared in the same manner as in Example 1 except that the mixing ratio of the weft of the woven fabric was changed to polyester yarn (96%) / cotton yarn (4%).

Example 5
A sample was prepared in the same manner as in Example 1 except that the mixing ratio of the weft of the woven fabric was changed to polyester yarn (29%) / cotton yarn (71%).

Comparative Example 1
A sample was prepared in the same manner as in Example 1 except that the weft of the woven fabric was changed to cotton yarn (100%).

Comparative Example 2
A sample was prepared in the same manner as in Example 1 except that the weft of the woven fabric was changed to polyester yarn (100%).

[Evaluation]
The samples obtained above were subjected to the following evaluation tests, and the results are shown in Table 1.
(Breathable)
It measured according to JIS L1096 air permeability A method. In addition, it evaluated with the adhesive tape after peeling release paper.
○: Air permeability is 20 cm ³ / cm ² · s or more ×; Air permeability is less than 20 cm ³ / cm ² · s

(Water repellency)
It measured according to JIS L1092 water repellency test (spray test). In addition, it evaluated with the adhesive tape after peeling release paper.
○: Water repellency 4 or more ×; Water repellency 3 or less

(Antibacterial)
The test was conducted in accordance with a test method for JIS Z2801 plastic products. In addition, it evaluated with the adhesive tape after peeling release paper.
○: Antibacterial activity value of 2.0 or more ×; Antibacterial activity value of less than 2.0

(Adhesion between woven fabric and adhesive layer)
The pressure-sensitive adhesive surfaces of the samples were bonded together and judged from the peeled state when peeled off by hand.
○: The adhesive layer did not peel off at the interface.
X: Interfacial peeling occurred between the woven fabric and the pressure-sensitive adhesive layer.
Δ: Interfacial peeling occurred partially.

(Adhesive strength 1)
It measured according to JIS Z0237. Each test sample was cut to a width of 25 mm and a length of 150 mm, and then the release paper was peeled off. The obtained adhesive tape was attached to a glass plate and left at a temperature of 23 ° C. and a relative humidity of 50% for 24 hours. The adhesive strength when each test sample was peeled off from each of the obtained adherends at a tensile speed of 300 mm / min and a tensile angle of 180 degrees was measured.
○: Adhesive strength 6.0 ± 2.0 N / 25 mm
X: Adhesive force greater than 8.0 N / 25 mm or less than 4.0 N / 25 mm

(Adhesive strength 2)
It measured according to JIS Z0237. Each test sample was cut to a width of 25 mm and a length of 150 mm, and then the release paper was peeled off. The obtained adhesive tape was attached to the back surface of a separately prepared adhesive tape and left in water at a temperature of 23 ° C. for 1 hour. The adhesive strength when each test sample was peeled off from each of the obtained adherends at a tensile speed of 300 mm / min and a tensile angle of 180 degrees was measured.
○: Adhesive strength 2.0 N / 25 mm or more ×; Adhesive strength less than 2.0 N / 25 mm

From the table, the pressure-sensitive adhesive tape of the example using a woven fabric in which a covering yarn obtained by covering a polyurethane yarn (core yarn) with a polyester yarn is a warp yarn, and a covering yarn obtained by covering a polyester yarn (core yarn) with a cotton yarn is used as a weft yarn. Excellent adhesion and adhesive strength. Moreover, since this used the adhesive composition containing an acrylic adhesive, polyacrylic acid sodium, an isocyanate type hardening | curing agent, ethyl acetate, and toluene, it had favorable air permeability. Furthermore, the water repellency and antibacterial properties were good because the water repellency and antibacterial processing were performed with paraffinic water repellent and biguanide antibacterial agents.
On the other hand, in the comparative example, the thing excellent in all these performances was not obtained.

The breathable pressure-sensitive adhesive tape of the present invention can be suitably used as a medical / sports pressure-sensitive adhesive tape, particularly a kinesiology tape.

1 Base material (woven fabric)
2 Adhesive layer 3 Separator layer

Claims (3)

A breathable adhesive tape having a substrate and an adhesive layer,
The base material is a woven fabric in which a warp yarn covered with a synthetic fiber yarn using a polyurethane yarn as a core yarn and a weft yarn covered with a cotton yarn as a core yarn covered with a cotton yarn are plain woven. tape. The breathable pressure-sensitive adhesive tape according to claim 1, wherein the pressure-sensitive adhesive layer is obtained by using a pressure-sensitive adhesive composition containing an acrylic pressure-sensitive adhesive, a water-absorbing polymer compound and a hydrophobic organic solvent. The breathable pressure-sensitive adhesive tape according to claim 1 or 2, which is a kinesiology tape.

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