JP2007330376A - Medical adhesive tape or sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide medical adhesive tape or sheet having an excellent manual cutting performance which can be cut by a user at a desired length. <P>SOLUTION: The medical adhesive tape or sheet comprises a nonwoven fabric substrate and an adhesive layer disposed on at least one surface of the substrate. A plurality of pores are provided on the tape or sheet so that the corners of the pores are aligned in at least one direction. The distance between one alignment of the pores and another alignment of the pores adjacent thereto is ≥1 mm and ≤15 mm. The nonwoven fabric substrate is preferably made of a thermoplastic resin. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a medical pressure-sensitive adhesive tape or sheet, and more particularly, to a medical pressure-sensitive adhesive tape or sheet used in the medical, hygiene field, sports field, etc., which requires hand cutting.

  Medical pressure-sensitive adhesive tapes or sheets generally have a pressure-sensitive adhesive layer on one side of a substrate, and there are many pressure-sensitive adhesive tapes or sheets in which the substrate is a nonwoven fabric. Thus, the pressure-sensitive adhesive tape or sheet whose base material is a nonwoven fabric is economically inexpensive, and some have excellent properties such as mechanical strength and adhesiveness.

  By the way, the medical adhesive tape is often required to have a hand-cut property that can be cut by hand. Various reports have heretofore been made on imparting hand-cutting properties to pressure-sensitive adhesive tapes. For example, examples have been reported in which holes are formed in pressure-sensitive adhesive tapes to improve hand cutting properties.

  JP-A-9-502111 discloses a non-woven surgical tape having a perforation, and an adhesive tape having a binder-containing non-woven web as a support has a perforation length of about 0.2 mm or more, A perforation having a perforation length of about 5 mm or less and an interval between adjacent perforations of about 0.1 mm or more and about 1.0 mm is provided. Japanese Utility Model Laid-Open No. 7-38153 discloses a perforated tape, for example, a length of 3 cm, 5 cm, or 8 cm, which is convenient for daily use, such as cello tape (registered trademark) or medical bandages. The perforation is easy to cut.

In general, a nonwoven fabric adhesive tape is difficult to cut by hand, and even if it can be cut by hand, its cut surface is often cut in an irregular state (a state where the stumps are not uniform). Moreover, in order to ensure the strength of the pressure-sensitive adhesive sheet itself, for example, it is necessary to appropriately adjust the size and interval of the perforation holes. In order to ensure the strength of the pressure-sensitive adhesive sheet itself, the conventional pressure-sensitive adhesive sheet is designed so that the pitch with respect to the perforation length direction has a certain interval or more.
However, in actual use, it is desirable that the adhesive tape can be cut to a desired length according to the purpose of use and the user without being limited by the pitch interval of the perforations provided.

Japanese National Patent Publication No. 9-502111 Japanese Utility Model Publication No. 7-38153

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a medical adhesive tape or sheet that can be cut by hand at a desired length and that can be cut straight. There is to get.

As a result of intensive studies, the present inventors have found that this problem can be solved by forming a specific hole using a specific support, and have completed the present invention.
That is, the medical pressure-sensitive adhesive tape or sheet of the present invention is a medical pressure-sensitive adhesive tape or sheet having an adhesive layer on at least one surface of the nonwoven fabric base material, and has holes so that the end portions are arranged in at least one direction. The distance between the rows is 1 mm or more and 15 mm or less.

  Here, the inter-column distance is preferably 1 mm or more and 10 mm or less.

Further, the nonwoven fabric substrate can be formed using a thermoplastic resin.
The nonwoven fabric substrate may be impregnated with a binder.

  In this invention, the surface on the opposite side to the surface which provided the said adhesion layer of the said nonwoven fabric base material may be peeling-processed.

In the present invention, the medical pressure-sensitive adhesive tape or sheet can be wound and stored in a roll form.

  ADVANTAGE OF THE INVENTION According to this invention, the medical adhesive tape or sheet | seat excellent in hand cutting property is obtained.

BEST MODE FOR CARRYING OUT THE INVENTION

  The medical adhesive tape or sheet of the present invention (hereinafter sometimes referred to as “adhesive tape or the like”) has an adhesive layer on at least one surface of the substrate. However, this base material consists of a nonwoven fabric.

  The nonwoven fabric used for this invention is not specifically limited about fiber length, a fiber diameter, etc. As a material for forming the nonwoven fabric, a thermoplastic resin is preferable, and polyolefin fibers, polyester fibers, and the like are more preferable from the viewpoints of easy procurement and easy perforation treatment. The nonwoven fabric may be formed using two or more kinds of materials, or may be a laminate of two or more layers that are the same or different.

  As a formation method of a nonwoven fabric, the manufacturing method generally used for the manufacture of a nonwoven fabric, for example, a dry method, a wet method, and a spun bond method, is not specifically limited. For example, in the dry method, an adhesive type immersion method, a printing method, a spray method, a powder method, a thermal bond method, etc., a mechanical bond type felt method, a stitch method, a needle punch method, a hydroentangled type spunlace method, Spin type spunbond method, mesh method, melt blow method, film method, etc. In wet methods, hydroentangled type spunlace method, spun method spunbond method, flash method, papermaking method, heat-bonded fiber method, heat A pressure method, an adhesive method, or the like is employed. Moreover, you may laminate the nonwoven fabric from which a manufacturing method differs.

As for the nonwoven fabric which comprises a base material, it is preferable that the basic weight of the whole nonwoven fabric is 10 g / m < ² > or more and 80 g / m < ² > or less. Considering the texture and mechanical strength, the basis weight of the whole nonwoven fabric is more preferably 12 g / m ² or more and 60 g / m ² or less.

  As will be described later, holes are formed in the nonwoven fabric constituting the base material of the medical adhesive tape or sheet of the present invention. However, in the present invention, it is preferable to subject the nonwoven fabric to a chemical binder treatment before forming the holes in the nonwoven fabric. For example, the chemical binder treatment can be performed by impregnating a non-woven fabric with a chemical binder or applying a chemical binder coating solution to at least one surface of the non-woven fabric.

  The chemical binder is not particularly limited, and a general chemical binder can be used. However, there is little chemical skin irritation, and the nonwoven fabric treated with the chemical binder does not give a sense of incongruity when it comes into contact with the skin. It is preferable to use a chemical binder that can realize flexibility and that allows the nonwoven fabric treated with the chemical binder to exhibit moisture permeability.

  Examples of the chemical binder preferably used include acrylic resin, vinyl acrylic resin, acetate / ethylene, and polyvinyl acetate. In addition, latexes bonded to acrylic resins, styrene / butadiene rubber, vinyl acetate / ethylene, vinyl acetate / acrylates, polyvinyl chloride, polyvinyl alcohols, polyurethanes, vinyl acetates, acrylic / vinyl acetate, etc. Examples of water-based chemical binders including those similar to these include acrylic latex binder, styrene / butadiene rubber latex, acrylic / vinyl acetate copolymer latex, and the like.

  For example, a chemical binder treatment can be performed by applying a water-based chemical binder to a nonwoven fabric using a wire wound rod, reverse roll, air knife, spray, or the like.

The amount of the chemical binder used may be appropriately determined according to the desired properties required for the medical adhesive tape, etc., for example, according to the mechanical strength (drying temperature, wet strength), tear properties, etc. preferable. In general, the amount of chemical binder used is preferably about 3 g / m ² or more and about 50 g / m ² or less, more preferably about 5 g / m ² or more and about 35 g / m ² or less.

  In the present invention, it is preferable to apply a back treatment after the chemical binder treatment is applied to the nonwoven fabric. By applying the back surface treatment to the nonwoven fabric, it is possible to smoothly unwind the formed medical pressure-sensitive adhesive tape or sheet even when the pressure-sensitive adhesive sheet is stored in the form of a roll. For example, the back treatment is preferably performed by applying a back treatment agent such as silicone, fluorine, long-chain alkyl, or wax. The amount of the back surface treatment agent used is preferably appropriately determined in consideration of the type of pressure-sensitive adhesive.

  The base material constituting the adhesive tape or the like of the present invention has a hole. The holes are provided such that at least one end forms a row. Here, the “end” refers to a corner, one side, a part of an arc, and the like. The shape and size of the hole is not particularly limited. For example, the shape of the hole can be arbitrarily selected on a straight line, a circle, a trapezoid, a quadrangle, a polygon, etc. It is necessary to be provided so as to form a row when viewed. For example, in the case of a straight hole, a straight longitudinal hole is provided so as to be arranged on the line, and in the case of a circular hole, a line is formed by connecting the circular holes. In the case of a quadrangular hole, the tips of the square corners are arranged in a row.

  The row of holes constituting the hole portion has a distance between rows, that is, a distance between the row and the adjacent row is 1 mm or more and 15 mm or less, preferably 1 mm or more and 10 mm or less, more preferably 3 mm or more, 7 mm or less. If the distance between the rows is 1 mm or more and the hole is formed, even if it is cut by hand, it can be cut so that the cut surface is almost straight. That is, it can cut along one row of holes without the cut surface extending over adjacent rows. Further, if the distance between rows is 15 mm or less, it is cut at a desired length, that is, a predetermined length according to the application, or a desired length determined by the convenience of the person using the adhesive tape. be able to. If the distance between the rows exceeds 15 mm, the length of the adhesive tape is longer than the required length, or if it is not shortened, there is a problem in usability because the situation that it cannot be cut easily occurs. If it is forcibly cut, it cannot be cut straight and tends to be a dirty cut surface.

  This hole may be a through-hole or a hollow state that does not penetrate, and these holes may be mixed as long as they do not adversely affect hand cutting properties. Needless to say, all the holes are preferably through-holes from the viewpoint of hand cutting.

  The hole can be formed by, for example, die roll cutting with a blade, cutting with laser irradiation, drilling with a metal roll, or the like. For example, when a hole is drilled in a base material by a metal roll, a metal roll provided with a protrusion having a hole shape and a pressure roll (a metal roll having a smooth surface) are arranged to face each other. A hole can be formed in the base material by sandwiching and passing a base material such as a nonwoven fabric between the rolls. In this case, the protrusions of the metal roll forming the holes are arranged at regular intervals, for example, and the tips of the protrusions may be pointed or flat.

  As the pressure roll, a stainless steel roll having a smooth surface, a rubber roll having a smooth surface obtained by coating a core metal with silicon rubber, and the like can be used.

  The metal roll is preferably heated to about 150 ° C. or higher and about 400 ° C. or lower, and the pressure roll is preferably heated to about 50 ° C. or higher and about 150 ° C. or lower.

  The pressure applied between the metal roll and the pressure roll, and the speed at which the non-woven fabric passes between these rolls (flow rate), take into account the shape of the protrusion of the metal roll, the temperature of the protrusion, the thickness of the non-woven fabric, etc. It is preferable to set so that appropriate holes are formed in the nonwoven fabric. In general, the pressure between the rolls is preferably about 5 kg / cm or more and about 200 kg / cm or less in terms of linear pressure, and the flow speed for passing the nonwoven fabric is about 1 m / min or more and about 50 m / min or less. It is preferable.

  The medical adhesive tape or the like of the present invention has an adhesive layer on one surface of the substrate. For example, the adhesive layer is provided on the surface opposite to the surface coated with the non-woven fabric chemical binder. The pressure-sensitive adhesive used to form the pressure-sensitive adhesive layer can be adhered to the skin, has flexibility to follow the skin, has little irritation to the skin (chemical irritation, physical irritation), and Those having moisture permeability are preferably used. For example, a pressure-sensitive adhesive for medical application can be used. Examples of the pressure-sensitive adhesive satisfying such requirements include a synthetic rubber-based pressure-sensitive adhesive mainly composed of a styrene-isobutylene-styrene copolymer, a polyurethane-based pressure-sensitive adhesive, a polysiloxane-based pressure-sensitive adhesive, a natural rubber-based pressure-sensitive adhesive, An ether pressure-sensitive adhesive, an acrylic pressure-sensitive adhesive, or the like can be used alone or in admixture of two or more.

  As the acrylic polymer constituting the acrylic pressure-sensitive adhesive, an acrylate ester is preferably used. Examples of the acrylate ester include esters of acrylic acid or methacrylic acid having an aliphatic group such as a butyl group, 2-ethylhexyl group, isononyl group, isooctyl group, and the like. Moreover, in order to improve cohesion and adhesiveness, you may copolymerize acrylic acid or methacrylic acid ester etc. as a vinyl ester which has a carboxyl group as needed.

  In the present invention, if necessary, a functional group that becomes a crosslinking point in the side chain, for example, a hydroxyl group, an amino group, an epoxy group or the like, and divinyl acrylate, trimethylpropanol triacrylate, dipentaerythritol hexaacrylate Polyfunctional unsaturated monomers having two or more polymerizable carbon-carbon double bonds in one molecule such as pentaerythritol triacrylate can be used in combination as a copolymerization monomer.

  The acrylic polymer used in the present invention may further contain an initiator. The initiator is not particularly limited. For example, a radical is generated by thermal decomposition of a peroxide such as hydrogen peroxide or benzoyl peroxide, or an azo compound represented by azobisisobutyronitrile (AIBN). A general initiator or the like that can generate radicals by irradiation of ultraviolet rays or the like can be used.

  The polymerization method for forming the acrylic polymer may be a solution polymerization method, an emulsion polymerization method, a suspension polymerization method, or the like, and is not particularly limited. For example, in the presence of a solvent or water, polymerization can be carried out by generating radicals using an initiator by thermal decomposition, or by generating radicals using an initiator that generates radicals by ultraviolet irradiation.

  If necessary, the pressure-sensitive adhesive is a plasticizer typified by a polyhydric alcohol such as glycerin, polyethylene glycol, polypropylene glycol, a water-soluble or water-absorbing resin such as polyacrylic acid, a cross-linked polyacrylic acid, or polyvinylpyrrolidone, Various additives such as rosin-based, terpene-based and petroleum-based tackifiers, various softeners, fillers and pigments can be blended.

  The pressure-sensitive adhesive layer is formed using the above-mentioned pressure-sensitive adhesive, but the pressure-sensitive adhesive layer may be provided on the entire surface of the substrate or may be partially provided. In the case where the adhesive layer is partially provided on the substrate, it can be provided in the form of dots or streaks. Since skin irritation is likely to occur when the skin is steamed, it is preferable to have a space that functions as an air passage. As the streaky shape, it is preferable that a space functioning as an air passage is secured, and examples thereof include a straight shape and a wavy shape, and other shapes may be used. Generally, a wavy shape in which the cross-sectional area of the interstitial space has little change with time is preferable. The adhesive layer may be a laminate in which two or more adhesive layers having different adhesive forces are laminated. In this case, for example, one adhesive layer is provided on the entire surface of the substrate, and the other adhesive layer is provided partially. You can also. In the present invention, the shape of the pressure-sensitive adhesive layer is preferably determined as appropriate depending on the properties of the pressure-sensitive adhesive layer and the use site of the formed pressure-sensitive adhesive tape or sheet.

  The adhesive layer may be formed by solution coating, emulsion coating, or hot melt coating using an adhesive.

  The adhesive layer may be provided before the hole is formed in the nonwoven fabric, or may be provided after the hole is formed. In the case of the pressure-sensitive adhesive tape in which the pressure-sensitive adhesive layer is formed after the hole is formed in the base material, the hole of the pressure-sensitive adhesive tape or the like may be a through-hole or a hole in a depressed state without penetrating. The through hole may be closed with an adhesive layer.

  The thickness of the pressure-sensitive adhesive layer constituting the medical pressure-sensitive adhesive tape or the like of the present invention is preferably appropriately determined according to the site to which the medical pressure-sensitive adhesive tape or the like is applied, the characteristics of the pressure-sensitive adhesive, etc. It is preferably 100 μm or less, more preferably 20 μm or more and 70 μm or less. If the thickness of the adhesive layer exceeds 100 μm, the water vapor permeability required for medical adhesive tapes and the like may not be obtained, making it difficult to impart sweat resistance. May cause irritation.

  The pressure-sensitive adhesive layer may be directly provided on one surface of the base material, for example, the surface opposite to the surface subjected to the chemical binder treatment of the nonwoven fabric, or may be indirectly provided. Here, “indirect” means that the substrate (including a substrate treated with a chemical binder or the like) and the adhesive layer are not in direct contact with each other, for example, the anchoring property between the adhesive layer and the substrate is improved. For this purpose, it means that the base material is applied to the surface of the base material, and the base material and the adhesive layer are stacked with a layer formed by applying the base coating material interposed therebetween.

  In the medical pressure-sensitive adhesive tape of the present invention, the surface of the pressure-sensitive adhesive layer may be covered with a release liner until use in order to prevent contamination of the surface of the pressure-sensitive adhesive layer. As the release liner, those generally used for an adhesive tape or sheet to be attached to the skin can be used. Specifically, the surface of high-quality paper, glassine paper, parchment paper, etc., coated with a release agent having a release performance such as silicone, or the high-quality paper coated with a resin anchor or polyethylene laminated What coated the release agent which has peeling performances, such as silicone, on the surface can be used.

  The medical adhesive tape or the like of the present invention can be in a roll form, and can be wound and stored, transported, etc. in a roll form. In this case, it is preferable to perform a peeling treatment on the back surface of the nonwoven fabric substrate, for example, on the surface of the substrate that has been subjected to the chemical binder treatment.

The medical pressure-sensitive adhesive tape or sheet of the present invention is suitable for medical use and hygiene materials such as adhesive bandages, covering materials for covering wound portions, post-surgical addressing materials, catheter needle penetrations and cover materials such as gauze. Further, it is preferably used for forming medical products such as fixing tapes and instrument holding tapes combined with other supports. It is suitable as a tape for body shape reinforcement and correction in trimmings, or as a tape for sports taping. The medical pressure-sensitive adhesive tape or sheet of the present invention exhibits an effect particularly excellent in hand cutting properties, and can be cut by hand at any length, and the cut surface is not uneven and has a good cut surface. .

  The present invention will be described more specifically with reference to the following examples. However, the present invention is not limited to these examples, and various applications are possible without departing from the technical idea of the present invention. In the following examples, unless otherwise specified, “part” means “part by weight”, and “%” means “% by weight”.

Example 1
Polyester fiber (basis weight 25g / m ² , "ELTAS E01025" manufactured by Asahi Kasei) is impregnated with a chemical binder (water-based binder containing acrylic resin) to perform binder treatment, and contains acrylic resin 15g / m ² I let you. The obtained nonwoven fabric substrate had a basis weight of 40 g / m ² .

  A mixture of 95 parts by weight of 2-ethylhexyl acrylate and 5 parts by weight of acrylic acid is mixed with ethyl acetate, 0.2 part of benzoyl peroxide (BPO) is added as a polymerization initiator, and a copolymerization reaction is performed in a nitrogen atmosphere. An acrylic copolymer was obtained. The obtained acrylic copolymer was applied to the silicone-treated surface of the release paper treated with silicone so that the thickness after drying was 40 μm, and dried in a drying building at 120 ° C. under the condition of 12 m / min to be adhered. A layer was formed. On the adhesive layer, the obtained non-woven fabric substrate was placed and bonded together to produce an adhesive sheet. Holes were formed in this adhesive sheet. That is, a pressure-sensitive adhesive sheet having a length of about 50 cm and a width of about 25 mm is cut out from the pressure-sensitive adhesive sheet, and a round shape having irregularities (the depth of the concave portion is 0.6 mm and the height of the convex portion is 1.0 mm). Using a blade cutter knife, perforations were formed in the length direction with a width of 5 mm (inter-row distance was 5 mm).

  About the obtained medical adhesive sheet, four persons (a, i, u, d) performed the following evaluation, respectively. These results are shown in Table 1.

Evaluation of hand cutting ability:
The medical adhesive sheet was torn with a finger to a length of 25 mm in a direction (width direction) perpendicular to the flow direction of the sheet at a desired length position. However, the measurement was performed 3 times (n = 3). The cut part which teared the medical adhesive sheet was observed, and the frequency | count that the cut surface cut | disconnected in one direction was counted. Moreover, it evaluated according to the following evaluation criteria.

(Evaluation criteria)
A There was no deformation at the end, and it could be cut straight.
B Although the part grasped with the finger was deformed, it could be cut straight.
C Wrinkles occurred at the part gripped by the finger, and it was cut obliquely.
D Could not be cut.

(Example 2)
In Example 1, a medical pressure-sensitive adhesive sheet was produced in the same manner as in Example 1 except that the distance between the perforation lines formed on the pressure-sensitive adhesive sheet was changed from 5 mm to 1 mm.
The same evaluation as Example 1 was performed about the obtained adhesive sheet for skin sticking. These results are shown in Table 1.

(Example 3)
In Example 1, a medical pressure-sensitive adhesive sheet was produced in the same manner as in Example 1 except that the distance between the perforation lines formed on the pressure-sensitive adhesive sheet was changed from 5 mm to 3 mm.
The same evaluation as Example 1 was performed about the obtained adhesive sheet for skin sticking. These results are shown in Table 1.

Example 4
In Example 1, a medical pressure-sensitive adhesive sheet was produced in the same manner as in Example 1 except that the distance between the perforation lines formed on the pressure-sensitive adhesive sheet was changed from 5 mm to 10 mm.
The same evaluation as Example 1 was performed about the obtained adhesive sheet for skin sticking. These results are shown in Table 1.

(Comparative Example 1)
In Example 1, a medical pressure-sensitive adhesive sheet was produced in the same manner as in Example 1 except that the distance between the perforation lines formed on the pressure-sensitive adhesive sheet was changed from 5 mm to 17 mm.
The same evaluation as Example 1 was performed about the obtained adhesive sheet for skin sticking. These results are shown in Table 1.

(Comparative Example 2)
In Example 1, a medical pressure-sensitive adhesive sheet was produced in the same manner as in Example 1 except that the distance between the perforation lines formed on the pressure-sensitive adhesive sheet was changed from 5 mm to 20 mm.
The same evaluation as Example 1 was performed about the obtained adhesive sheet for skin sticking. These results are shown in Table 1.

  As is clear from Table 1, the medical adhesive tapes of Examples 1 to 4 can be cut by hand at a desired length for each of four persons (a, i, u, e), and straight. Could be cut. In addition, the medical adhesive tapes of Examples 1 to 4 were able to cut the cut ends without being uneven. That is, it turned out that the medical adhesive tape of this invention is excellent in hand cutting property.

On the other hand, in Comparative Examples 1 and 2 having a hole where the distance between the rows exceeds 15 mm, wrinkles may occur in the portion gripped by the finger or may be cut obliquely, and some people cannot cut even once. was there.
In addition, in the adhesive tape whose space | interval between rows | rows is 0.5 mm, a cut surface may straddle the adjacent hole row | line | column, and it was difficult to form a straight cut surface.

  The medical pressure-sensitive adhesive tape or sheet of the present invention is suitable as a pressure-sensitive adhesive tape or sheet used in the medical field, sports field, etc., and particularly suitable when hand cutting is required. Further, if necessary, it can be cut into an appropriate size, shape, etc. and used as, for example, an emergency bandage, plaster, adhesive bandage, taping tape or the like.

Claims (6)

  A medical pressure-sensitive adhesive tape or sheet having an adhesive layer on at least one surface of a non-woven fabric substrate, wherein the end portions are arranged in rows in at least one direction, and the distance between the rows is 1 mm or more A medical pressure-sensitive adhesive tape or sheet having a thickness of 15 mm or less.   The medical adhesive tape or sheet according to claim 1, wherein the distance between the rows is 1 mm or more and 10 mm or less.   The medical adhesive tape or sheet according to claim 1 or 2, wherein the nonwoven fabric substrate is formed using a thermoplastic resin.   The medical adhesive tape or sheet according to any one of claims 1 to 3, wherein the nonwoven fabric substrate is impregnated with a binder.   The medical adhesive tape or sheet according to any one of claims 1 to 4, wherein a surface of the nonwoven fabric base opposite to the surface on which the adhesive layer is provided is peeled off.   The medical adhesive tape or sheet according to any one of claims 1 to 5, wherein the medical adhesive tape or sheet is wound and stored in a roll form.