JP2012231919A - Adhesive tape for skin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adhesive tape having quick drying property which can facilitate evaporation of moisture and reduce unpleasant or odd feelings of a user, even if the moisture penetrates into a base material in hand-washing or bathing and so on.SOLUTION: The adhesive tape for skin includes: the base material 2 having knit fabric that is warp-knitted by a covered yarn having a synthetic non-elastic yarn wound around a stuffer thread made of a synthetic elastic yarn; and an adhesive layer 3 having adhesion and formed on one main surface of the base material 2.

Description

  The present invention relates to an adhesive tape for skin having quick drying properties.

  In recent years, adhesive tapes for skin have been used for various uses such as taping tapes, medical emergency bandages, and emergency bandages in the sports and medical fields. The skin adhesive tape supports, reinforces, and compresses the area by fixing the joints and muscles of the body with the skin adhesive tape, thereby reducing pain and promoting healing. be able to. The skin adhesive tape is relatively inexpensive and safe. For these reasons, the adhesive tape for skin is particularly suitably used for prevention of injury and emergency measures in sports.

  Normally, users of skin adhesive tapes perform sports competitions and daily life with the tape applied, so when swimming in a pool, washing hands, taking a bath, etc. The said tape will touch water and adhesiveness will fall.

  2. Description of the Related Art Conventionally, as a base material for an adhesive tape for skin, a woven fabric having stretchability composed of a plain weave structure in which cotton yarn and elastic yarn such as spandex are mixed has been used. Therefore, when the skin adhesive tape comes into contact with water by swimming, washing hands, bathing, etc., water is impregnated in the weaving thread that forms the fabric, causing discomfort and discomfort to the user. There is a problem.

  As a conventional technique for solving such problems, a technique related to a skin adhesive tape in which a main surface opposite to the main surface in contact with the adhesive layer of the base material is subjected to a water-repellent process such as a silicone coating. Is disclosed (for example, see Patent Document 1).

JP 2008-38201 A

  However, the water-repellent treatment can prevent the penetration of moisture into the base material if it is about a few drops of water, but when the entire skin adhesive tape is exposed to moisture for a long time, such as bathing In addition, when touching a water flow having a water pressure, such as hand washing or showering, there is a problem that sufficient water repellent effect cannot be exhibited and moisture permeates into the substrate.

  Further, even when moisture permeates into the base material in this way, there is no problem if the moisture evaporates in a short time, but the prior art skin adhesive tape does not take into account quick-drying properties. However, as described above, the water-repellent process is performed by a silicone coating or the like, so that there is a small gap for moisture to evaporate on the surface of the base material, and there is a problem that it is difficult to evaporate.

  Therefore, the conventional technology does not sufficiently solve the problem that moisture permeates into the base material due to adhesion of moisture by hand washing or bathing, and the user feels uncomfortable or uncomfortable.

  The object of the present invention is to have a quick-drying skin that is easy to evaporate even when water penetrates into the base material by hand washing or bathing, and can reduce the user's discomfort and discomfort. It is to provide an adhesive tape for use.

The present invention comprises a base material comprising a knitted fabric warp knitted with a covering yarn obtained by winding a synthetic fiber inelastic yarn around a core yarn comprising a synthetic fiber elastic yarn,
An adhesive tape for skin, comprising an adhesive layer having adhesiveness formed on one main surface of the substrate.

In the present invention, the synthetic fiber elastic yarn is a polyurethane yarn,
The synthetic fiber inelastic yarn is a polyester yarn.

  In the present invention, the pressure-sensitive adhesive layer is a foamable pressure-sensitive adhesive layer containing a pressure-sensitive adhesive resin and a foamable substance.

  According to the present invention, the base material is composed of a knitted fabric warp knitted with a covering yarn obtained by winding a synthetic fiber inelastic yarn around a core yarn of a synthetic fiber elastic yarn. As described above, since the knitting yarn is a covering yarn made only of synthetic fibers, the moisture can be evaporated in a shorter time as compared with the cotton yarn of natural fibers used in the base material as in the above-mentioned conventional technology. Can do. In addition, since the base material is a knitted fabric by warp knitting, the porosity can be increased and the air permeability can be increased as compared with a conventional woven fabric such as plain weave, and the air contact area of the base material Can be increased to promote moisture drying. Therefore, even in a state where moisture has permeated into the base material, the moisture can be evaporated in a short time, so that the user's discomfort and discomfort can be reduced.

  Further, according to the present invention, since the pressure-sensitive adhesive layer is a foamable pressure-sensitive adhesive layer containing a pressure-sensitive adhesive resin and a foamable substance, the pressure-sensitive adhesive is compared with a pressure-sensitive adhesive layer made of a conventional pressure-sensitive adhesive. Air permeability in the layer can be increased and air permeability can be increased. Therefore, when moisture permeates into the substrate, the moisture can be evaporated in a shorter time, and the user's discomfort and discomfort can be reduced.

It is sectional drawing of the adhesive tape 1 for skin which is one Embodiment of this invention. It is a graph which shows the change of a moisture content until the water | moisture content is impregnated in Example 1 and Comparative Examples 1-3, and the said water | moisture content dries.

  FIG. 1 is a cross-sectional view of a skin adhesive tape 1 according to an embodiment of the present invention. The skin adhesive tape 1 can be used for various applications such as a tape for taping, a medical emergency bandage, an emergency bandage, etc., and can be particularly suitably used for a tape for taping.

  The skin adhesive tape 1 includes a base material 2 and an adhesive layer 3 having adhesiveness formed on one main surface of the base material 2. Further, the release sheet 4 is provided on the surface of the pressure-sensitive adhesive layer 3 opposite to the surface facing the substrate 2.

  In the present embodiment, the release sheet 4 is provided on the surface of the pressure-sensitive adhesive layer 3 opposite to the surface facing the substrate 2, but in other embodiments, the release sheet 4 may not be provided.

  The skin adhesive tape 1 is used by peeling the release sheet 4 and sticking the exposed adhesive layer 3 so as to face a desired part of the body.

  The base material 2 is a knitted fabric that is warp knitted with a covering yarn in which an elastic yarn is a core yarn and an inelastic yarn is wound once or double around the core yarn.

  Synthetic fibers can be used as the fiber material that can be used for the elastic yarn that is the core yarn. For example, a polymer composition mainly composed of polyurethane can be used. Examples of the polyurethane include known polyurethanes such as polyethers, polyesters, and polycarbonates, and these can be obtained by reacting polyisocyanates, polymer diols, and other polyfunctional low molecular compounds having active hydrogen. .

  As a fiber material that can be used for the inelastic yarn wound around the core yarn, for example, synthetic fibers such as polyester, nylon, and polyolefin can be used. These fibers may be used alone or in combination of various types depending on the functionality and comfort at the time of sticking.

  Addition of antioxidants, matting agents, colorants, dyeability improvers, flame retardant improvers, antistatic agents, deodorizers, etc. to the synthetic fibers, depending on the functionality, design, etc. Can do.

  As described above, since the knitting yarn is a covering yarn made only of synthetic fibers, moisture can be evaporated in a shorter time compared to a natural fiber cotton yarn conventionally used for base materials.

  The fineness of the elastic yarn and the non-elastic yarn can be appropriately changed depending on the application of the skin adhesive tape 1 using a knitted fabric. For example, when used for a taping tape, quick drying, stretchability, thickness, etc. In view of the above, the elastic yarn is preferably within a range of 42 dtex to 46 dtex, and the inelastic yarn is preferably within a range of 31 dtex to 35 dtex. When the fineness of the non-elastic yarn is out of the above range, the base material 2 becomes too thick or too thin, and the balance with the elastic yarn becomes poor. Problems such as lowering.

  In this embodiment, a polyurethane elastic yarn having a fineness of 44 dtex is used as the core yarn, and a polyester inelastic yarn having a fineness of 33 dtex is used as the yarn wound around the core yarn.

  As long as the base material 2 is a knitted fabric by warp knitting, any knitting such as cord knitting, denby knitting, and atlas knitting may be used. By using a knitted fabric knitted by warp knitting as the base material 2, a warp knitting structure using a thin elastic yarn as a core yarn can be used as the base material 2, so that a woven fabric such as plain weave or oblique weave is used. It can be set as the base material 2 which has a stretching property compared with the case.

  In addition, since the knitted fabric has higher air permeability than the woven fabric, it is possible to increase the contact area of the fabric with air and achieve high quick drying. The reason why the knitted fabric has higher air permeability than the woven fabric is because of its high porosity.

  Therefore, when the base material 2 is knitted by warp knitting, the base material 2 has stretchability and quick-drying property, and even when water penetrates into the base material 2, the water is evaporated in a short time, and the user can It is possible to realize the adhesive tape 1 for skin with reduced discomfort and discomfort.

  Further, as shown in FIG. 1, by employing a knitted fabric knitted by warp knitting on the base material 2, it is possible to provide irregularities on the contact surface of the base material 2 that comes into contact with the pressure-sensitive adhesive layer 3. The contact area with the pressure-sensitive adhesive layer 3 can be reduced as compared with the case of using it, and the gap between the base material 2 and the pressure-sensitive adhesive layer 3 can be increased. Therefore, the air permeability in the state where the skin adhesive tape 1 is adhered to the body can be enhanced, and the moisture can be evaporated in a short time when the moisture penetrates into the substrate 2.

  In this embodiment, the base material 2 is a knitted fabric warp knitted with a covering yarn composed of a polyurethane elastic yarn having a fineness of 44 dtex and a polyester inelastic yarn having a fineness of 33 dtex, and is large only in the longitudinal direction. In order to expand and contract and prevent expansion and contraction in the width direction, polyester inelastic yarn is inserted as an insertion yarn and knitted.

  The yarn used as the insertion yarn may be an inelastic yarn, and the same fiber material that can be used for the inelastic yarn wound around the core yarn can be used.

  Further, the fineness can be appropriately changed depending on the use of the skin adhesive tape 1 using a knitted fabric. For example, when used for a taping tape, the fineness is considered from the viewpoint of quick drying, stretchability, thickness, and the like. Is preferably in the range of 80 dtex to 88 dtex. In this embodiment, a polyester inelastic yarn having a fineness of 84 dtex is used.

  The mixing ratio in the knitted fabric used for the base material 2 can be appropriately changed depending on the application of the skin adhesive tape 1 using the knitted fabric and the function to be given. For example, when used for a taping tape, From the viewpoint of quick drying, stretchability, thickness, and the like, it is preferable that the polyurethane elastic yarn has a mixed ratio of 3 to 10% and the polyester inelastic yarn has a mixing ratio of 90% to 97%. In the present embodiment, the mixture ratio of the knitted fabric used for the base material 2 is 5% for the polyurethane elastic yarn and 95% for the polyester inelastic yarn.

  In addition, the said mixing rate was measured according to the mixing rate test method 2nd part: fiber mixing rate of the textile product of standard number JIS L 1030-2.

The outline of the measurement procedure is as follows.
The pre-treated skin adhesive tape 1 is loosened and separated into yarns for each fiber type, dried and cooled, weighed, and the absolute dry mass of each of the polyester fiber and polyurethane fiber is obtained. The mixing ratio of polyester fiber and polyurethane fiber was determined from the absolute dry mass.

  Although the thickness of the knitted fabric used for the base material 2 can be appropriately changed depending on the use of the skin adhesive tape 1 using the knitted fabric, for example, when used for a taping tape, From the viewpoint of thickness and the like, a range of 0.20 mm to 0.40 mm is preferable. By having such a thickness, it has sufficient quick-drying and stretchability, and even when the clothes are worn on the body, the user does not feel uncomfortable, By contacting, the possibility that the taping tape is peeled off or the position of the taping tape is shifted can be reduced. In this embodiment, the thickness of the base material 2 is formed to 0.30 mm.

  The yarn density of the knitted fabric used for the base material 2 can be appropriately changed depending on the use of the skin adhesive tape 1 using the knitted fabric. For example, when used for a taping tape, it can be quickly dried or stretched. From the viewpoint of thickness that does not hinder body movement, the course density is within the range of 62 / 2.54 cm to 68 / 2.54 cm, and the well density is within the range of 30 / 2.54 cm to 34 / 2.54 cm. Preferably there is. As for the density of the knitted fabric used for the base material 2 in this embodiment, the course density is 65 / 2.54 cm, and the well density is 32 / 2.54 cm.

  The pressure-sensitive adhesive layer 3 is a foamable pressure-sensitive adhesive layer containing a pressure-sensitive adhesive resin and a foamable substance. The composition of the pressure-sensitive adhesive used for the pressure-sensitive adhesive layer 3 is not particularly limited as long as it has flexibility and viscoelasticity that can follow the skin. In this embodiment, an acrylic foaming adhesive is used.

  By using an acrylic foaming adhesive, the burden on the human body can be reduced, and compared with an adhesive layer made of a normal adhesive, the air permeability in the adhesive layer is increased and the skin Since the air permeability of the adhesive tape 1 can be increased, the moisture can be evaporated in a shorter time when the moisture penetrates into the base material 2, thereby reducing discomfort and discomfort to the user. can do.

  The pressure-sensitive adhesive resin constituting the pressure-sensitive adhesive layer 3 is not particularly limited as long as it is a rubber-based, acrylic-based, or silicone-based pressure-sensitive adhesive resin that is usually used for pressure-sensitive adhesives. It is preferable to use a resin.

  As the foamable substance constituting the pressure-sensitive adhesive layer 3, water, a thermally decomposable foaming agent, a thermally expandable microcapsule, or the like can be used. In this embodiment, water is used as the foamable substance.

  When water is used as the foamable substance, a water-absorbing polymer substance may be used together with water. Examples of the water-absorbing polymer material include starch-acrylonitrile graft polymer, starch-acrylic acid graft polymer, cellulose-acrylonitrile graft polymer, cellulose-styrene sulfonic acid graft polymer, polyvinyl alcohol cross-linked polymer, polyacrylate Cross-linked products, saponified products of polyacrylonitrile polymers, and the like can be mentioned.

  In the case of adding a water-absorbing polymer substance in addition to water, the amount of water added may be in the range of 10 to 3000 times, more preferably 20 to 600 times the weight part of the substance added amount. Range.

  Moreover, in other embodiment of this invention, when the adhesive layer 3 comprises, you may comprise including a foaming adjuvant. An inorganic filler etc. can be used as a foaming adjuvant. The foaming assistant functions as a cell nucleating agent for forming fine bubbles in the pressure-sensitive adhesive layer by refining the gas generated from the foamable substance.

  Further, if necessary, an antioxidant, a tackifier, a plasticizer, a preservative, and the like can be added to the adhesive resin.

  The thickness of the pressure-sensitive adhesive layer 3 can be appropriately changed depending on the use of the adhesive tape 1 for skin. For example, when used for a tape for taping, from the viewpoint of quick drying, stretchability, adhesiveness, thickness, etc. A range of 0.05 mm to 0.15 mm is preferable. By having such a thickness, it has sufficient quick-drying properties and stretchability, and does not cause a sense of incongruity to the user. A taping tape that does not work can be realized. In the present embodiment, the pressure-sensitive adhesive layer 3 is formed with a thickness of 0.12 mm.

  As the release sheet 4, any known release sheet can be used as long as it can be easily peeled off from the pressure-sensitive adhesive layer 3 when the skin adhesive tape 1 is used. For example, a paper coated with a release agent such as silicone or a plastic film can be used. In this embodiment, paper coated with silicone is used, and its thickness is 0.09 mm.

  The skin adhesive tape 1 can be produced using any known method as long as the base material 2 and the pressure-sensitive adhesive layer 3 are laminated in this order. In this embodiment, the adhesive tape 1 for skin provided with the release sheet 4 is coated with a pressure-sensitive adhesive that forms the pressure-sensitive adhesive layer 3 over the entire surface of one main surface of the strip-shaped release sheet 4. A base material which is a belt-shaped knitted fabric on the side where the pressure-sensitive adhesive layer 3 of the release sheet 4 is formed by heating at a temperature, for example, 120 ° C. to 160 ° C. to foam the pressure-sensitive adhesive. 2 is bonded, cut into a predetermined size, and wound into a roll.

  Here, in this embodiment, the pressure-sensitive adhesive is applied to the entire surface of the release sheet 4, but in other embodiments of the present invention, it may be applied in a stripe shape or a pattern shape, and a comb-shaped die is used. The adhesive may be applied in a desired line shape or wave shape by fixing the comb during application or moving the amplitude.

  By applying a pressure sensitive adhesive in a line shape or a wave shape, a space can be provided in a region where the pressure sensitive adhesive is not applied between the base material 2 and the pressure sensitive adhesive layer 3. In addition, air permeability can be improved, and moisture can be evaporated in a shorter time.

  Thus, when the pressure-sensitive adhesive is applied in a stripe shape or a wave shape, the contact area of the base material 2 that contacts the pressure-sensitive adhesive layer 3 is smaller than when the pressure-sensitive adhesive layer 3 is applied. It is preferable to increase the adhesiveness of the pressure-sensitive adhesive to be formed.

(Example)
Below, the skin adhesive tape 1 of this embodiment is compared with the existing skin adhesive tape sold in the market.

-Physical property value measurement The following Table 1 is a table | surface for comparing Example 1 applicable to the skin adhesive tape 1 of this embodiment, and Comparative Examples 1-3 which are the existing tapes. The air permeability in Table 1 was measured according to JIS L 1096 air permeability B method (Gurley method).

The outline of the measurement procedure is as follows.
Samples of about 50 mm × 50 mm were taken from five different points on each tape of Example 1 and Comparative Examples 1 to 3, and each cap was inserted into the air outlet of a Gurley type air permeability tester and the cap stun was screwed up. Tighten the specimen. Thereafter, the time required for 300 ml of air to be ejected through the sample under a constant pressure was measured. In addition, measurement was performed at three different locations for each test piece.

  Hand elongation is measured by peeling the release sheet provided on the skin adhesive tape, pulling both ends in the longitudinal direction of the skin adhesive tape, and measuring the longitudinal dimension when it stops stretching did. In addition, in the rate of manual elongation, the dimension in the longitudinal direction in a state where each skin adhesive tape is adhered to the release sheet is defined as 100%.

In addition, the basis weight was measured for a skin adhesive tape (a state excluding a release sheet).
Moreover, the mixed use rate was calculated | required by the method similar to the mixed use rate of the said adhesive tape 1 for skin.

  In Comparative Examples 1 to 3, the base material is common to cotton and polyurethane, and the construction method is also common to plain weave, but Comparative Example 1 is more breathable than Comparative Examples 2 and 3. ing. From this, it can be seen that the air permeability can be improved when the foamable pressure-sensitive adhesive is used rather than when the non-foamable pressure-sensitive adhesive is used as the pressure-sensitive adhesive.

  In addition, Example 1 and Comparative Example 1 have better air permeability than Comparative Example 1 even though the adhesive is a foaming adhesive. From this, it can be seen that the air permeability can be improved by forming the base material with a knitted fabric knitted with a warp knitting having a higher porosity than a plain woven fabric.

  Moreover, since Example 1 can provide an unevenness | corrugation in the contact surface of the base material 2 which contacts the adhesive layer 3 as mentioned above, when a adhesive enters into the said recessed part, a base material is a plain-woven fabric. Compared with the comparative examples 1-3 formed, the thickness which added the base material and the adhesive layer can be made thin. Therefore, the thickness of the skin adhesive tape 1 can be reduced. Moreover, Example 1 can make a fabric weight low compared with Comparative Examples 1-3.

  From these things, a user's uncomfortable feeling at the time of wearing of the skin adhesive tape 1 can be reduced. In addition, since the thickness can be reduced, it is possible to suppress wrinkling at the time of wearing, and for example, it is possible to reduce discomfort and discomfort caused to the user when used by wrapping multiple times.

  Moreover, since Example 1 is formed with the knitted fabric in which the base material 2 was warp knitted, the hand elongation rate should be higher than those of Comparative Examples 1 to 3 in which the base material is formed of a plain woven fabric. Can do. Therefore, when the skin adhesive tape 1 is attached to a part such as a joint, it can easily expand and contract along the movement of the body, reducing the user's uncomfortable feeling.

  The yarn density is the number of yarns within a predetermined range, and the yarn count indicates the thickness of the yarn. Based on the yarn density and yarn count, how much yarn is present within a certain range. I asked for the ratio. When the ratios of Comparative Examples 1 to 3 were compared, the ratio was 1: 1.1: 1.4. The higher the numerical value of this ratio, the larger the amount of yarn in the predetermined range, that is, the smaller the void (the lower the void ratio).

  Therefore, in Comparative Examples 2 and 3, the porosity of Comparative Example 2 is higher. Here, as shown in Table 1, in Comparative Example 2 and Comparative Example 3, Comparative Example 2 has higher air permeability. Thus, when air permeability is high, the relationship that the porosity is high is formed.

  In Comparative Examples 1 and 2, there is no significant difference in the ratio, but there is a large difference in air permeability. This is considered to be due to the fact that the use of the foamable pressure-sensitive adhesive can improve the air permeability as compared with the case of using the non-foamable pressure-sensitive adhesive as described above.

・ Quick-drying evaluation
FIG. 2 is a graph showing a change in moisture content until Example 1 and Comparative Examples 1 to 3 are impregnated with moisture and the moisture is dried. In FIG. 2, the line L1 shows the test result of Example 1, and the lines L11-L13 show the test result of Comparative Examples 1-3.

In the test shown in FIG. 2, a sample (5 cm wide × 10 cm long) is attached to an acrylic plate, and the weight (W) is measured. The sample was pulled up together with the acrylic plate after being immersed for 30 minutes, and excess water droplets adhering to the acrylic plate were removed by passing through a roller. The weight (W1) was measured, and the standard state (20 ° C. × 65% RH) was left in the room and the weight (Wx) at regular intervals was measured. The moisture content was calculated based on the following formula.
Moisture content (%) = {(W1-W)-(Wx-W)} / (W1-W) × 100

  From FIG. 2, it can be seen that Example 1 has a short drying time and quick drying property as compared with Comparative Examples 1 to 3.

-Drying speed evaluation The following numerical values are obtained by performing the same test as that shown in Fig. 2 with Example 1 stretched in the longitudinal direction and hand elongations of 170%, 150%, 130%, and 100%. In this case, the amount of change in water content per 30 minutes. In addition, the state affixed on the peeling sheet 4 is a state with 100% of hand elongation.

Hand elongation 170%: 70.8 (%) / 30 min
Hand elongation 150%: 68.7 (%) / 30 min
Hand elongation 130%: 67.4 (%) / 30 min
Hand elongation 100%: 50.0 (%) / 30 min

  As is apparent from the above numerical values, it can be seen that the skin adhesive tape 1 corresponding to Example 1 has better drying efficiency and quick-drying when stretched. This is considered to be caused by an increase in the surface area in contact with air as a result of the deformation of the knitted fabric of the knitted fabric and the increase in the void ratio. In the case of a woven fabric, it is considered that the same effect cannot be obtained because the woven fabric is not deformed as much as the knitted fabric even when stretched.

  Usually, the skin adhesive tape 1 is applied to the body while being stretched to some extent. In many cases, the body stretches more than the first attached state due to body movement. Therefore, when the stretched state as described above has a quick drying property, a good quick drying property can be realized in the use state.

1 Adhesive tape for skin 2 Base material 3 Adhesive layer 4 Release sheet

Claims (3)

A base material made of a knitted fabric warp knitted with a covering yarn obtained by winding a synthetic fiber inelastic yarn around a core yarn made of synthetic fiber elastic yarn;
An adhesive tape for skin comprising an adhesive layer having adhesiveness formed on one main surface of the substrate. The synthetic fiber elastic yarn is a polyurethane yarn,
The skin adhesive tape according to claim 1, wherein the synthetic fiber inelastic yarn is a polyester yarn.   The adhesive tape for skin according to claim 1 or 2, wherein the pressure-sensitive adhesive layer is a foamable pressure-sensitive adhesive layer containing a pressure-sensitive adhesive resin and a foamable substance.