JPH0833673A - Tacky adhesive film for first-and adhesive plaster and first-aid adhesive plaster using the same film - Google Patents

Abstract

PURPOSE:To provide a tacky adhesive film which does not hinder skin respiration, prevents the skin stimulus generated by moistening, etc., prevents infiltration of water, detergents, etc., into absorption pad parts, etc., further prevents infiltration of bacteria, makes the prevention of the infiltration more perfect by hermetic sealing of the edges, has improved breaking strength and wear resistance and is improved in operability. CONSTITUTION:This tacky adhesive film for the first-aid adhesive plaster formed by applying a tacky adhesive on one surface of nonwoven fabric having air permeability and stretchability is formed by laminating the nonwoven fabric side surface with a film having moisture permeability and waterproofness, subjecting the edges thereof to a sealing treatment an/or laminating the surface on the nonwoven fabric side with a film selected from blanks made of polyurethane, polyester elastomer, porous polyolefin and porous polyvinyl chloride. This first-aid adhesive plaster is formed by using the tacky adhesive film.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure-sensitive adhesive film for a first-aid bandage and a first-aid bandage using the pressure-sensitive adhesive film for a first-aid bandage. More specifically, a nonwoven fabric having breathability and elasticity is used as a base fabric of the bandage. Then, the nonwoven fabric is laminated with a moisture-permeable and waterproof film, and the edge portion is subjected to a sealing treatment to provide a moisture-permeable and waterproof adhesive film for an emergency adhesive bandage and an emergency using the adhesive film. Regarding adhesive bandages.

[0002]

2. Description of the Related Art Conventionally, the problems to be solved by the invention
As the base material of the adhesive film for first aid bandages, polyvinyl chloride, polyethylene, polyester, polypropylene,
Films of cellulose, acetate, etc. are often used. However, since these films are inferior in breathability and moisture permeability, when used as a first-aid bandage, they obstruct skin breathing and cause stuffiness when applied to the skin.
It tends to cause skin irritation. In order to prevent this and give sufficient moisture permeability, it is necessary to use a sufficiently thin one, while when thinned, so-called waist disappears due to its flexibility, and when it is tried to stick to the affected area It is difficult to stick and it is difficult to put it on, and the utility tends to be lost. When attempting to use a thin film in consideration of such drawbacks, a method of using a support made of another film has been carried out to facilitate sticking, but the operation of sticking to the affected area becomes complicated, which is preferable. Absent. Therefore, when these films are used as a base material, measures such as provision of ventilation holes are generally taken, but still the parts other than the ventilation holes locally impede skin respiration, and the ventilation holes further serve as pads. The waterproofness was not sufficient as it could cause water to enter the parts. In order to improve such problems, various bandages made of a film having air permeability and water repellency have been studied. For example, a bandage using a porous air-permeable fluororesin film is disclosed in Japanese Utility Model Publication No. 61-65927. However, the fluororesin film has the drawback of low extensibility, that is, poor stretchability. Further, a bandage using a porous film treated with a water repellent is disclosed in JP-A-61-253.
058. Further, Japanese Patent Laid-Open No. 62-148538 discloses a perforated resin stretched film for emergency bandages in which a stretched film is perforated using an electron beam and a laser beam. Further, JP-A-5-111507 discloses a medical adhesive film using a film obtained by uniaxially stretching a thermoplastic resin containing an inorganic filler to make it porous. However, these porous films are treated with silicone resin,
Even if waterproof treatment is performed with a fluororesin or the like, it is possible to prevent the infiltration of water, but it is difficult to completely prevent the infiltration of a surfactant solution such as a detergent having a small surface tension.

On the other hand, in recent years, there is one using a base cloth made of a non-woven fabric made of a material such as polystyrene, polyurethane, or rayon. Since these are excellent in breathability and moisture permeability due to the nature of the non-woven fabric, the above-mentioned drawback of impeding skin breathing is solved, but there is a problem that water penetrates into the pad portion due to poor waterproofness. . Further, in order to use these base fabrics as an adhesive film for a first aid bandage, improvement in various properties such as strength and chemical resistance is required. The present invention provides a pressure-sensitive adhesive film for a first-aid bandage, which has never been seen to have sufficient waterproofness, particularly waterproofness against surfactant solutions such as detergent having a small surface tension, while ensuring sufficient air permeability and moisture permeability. It was made for the purpose of providing.

[0004]

According to the present invention, a nonwoven fabric having breathability and stretchability is laminated with a film having moisture permeability and waterproof property, and an edge portion is subjected to a sealing treatment to have moisture permeability. The object is to solve the above problems by applying an adhesive and / or applying the adhesive in a pattern. That is, the present invention, the pressure-sensitive adhesive film for a first-aid bandage, wherein a pressure-sensitive adhesive having moisture permeability is applied to one surface of the nonwoven fabric, or the adhesive film for a first-aid bandage is applied so as to have moisture permeability, the surface of the nonwoven fabric has moisture permeability and waterproofness. A pressure-sensitive adhesive film for a first-aid bandage, which is laminated with a film, and optionally further sealed at the edge thereof, and more specifically, stretchability of polystyrene-based polymer, polyurethane, polyester, etc. Moisture permeable to a non-woven fabric laminated with a waterproof and moisture permeable film such as polyurethane film, polyester elastomer film, polyolefin porous film, porous polyvinyl chloride film, etc. With a pressure sensitive adhesive, preferably a porous pressure sensitive adhesive, and / or a pattern of the pressure sensitive adhesive. Co - about coating the bandage adhesive film and bandage using said adhesive film.

The nonwoven fabric used in the present invention may be any as long as it has breathability and stretchability. Particularly known, styrene-isoprene-styrene type block copolymer, and polystyrene elastomer such as hydrogenated block copolymer hydrogenated thereto, polyurethane, polyester and elastic filaments formed from a mixture thereof and the like. Nonwoven fabrics are preferred, but not limited to. The stretch rate of the nonwoven fabric is 100% or more, the recovery rate when stretched by 50% is 70% or more, and the weight thereof is preferably in the range of ^{20 to} 200 g / m ² . The basis weight of the nonwoven fabric used in the present invention should be appropriately selected depending on the properties of the laminating film or the nonwoven fabric itself and the properties of the pressure-sensitive adhesive to be used, and it is not particularly limited, but preferably 20 to 200 g / m ² , More preferably 30-
It is 100 g / m ² . The thickness of the non-woven fabric, when laminating a laminate film, may be sufficient rigidity is imparted to the adhesive film for a first aid bandage, compared to a non-woven fabric usually used as a base material of the first aid bandage, Can be made thin, about 20-1000 μm, preferably 50-5
It is in the range of 00 μm.

The film used for the laminate of the nonwoven fabric in the present invention imparts waterproofness to the first-aid bandage without significantly impairing the breathability and moisture permeability of the non-woven fabric, and when used as a first-aid bandage, it has an appropriate balance of physical properties. The material is required to have waterproofness and still have moisture permeability when laminated on a nonwoven fabric. In order to have such characteristics, it is necessary that the film is a film that allows water vapor to pass through but prevents liquid water from permeating. As such a film, a known film formed of polyurethane, polyester elastomer, porous polyolefin, porous polyvinyl chloride or the like can be used. Among these, a polyurethane film, a polyester elastomer film, and the like are preferable because they have high waterproofness, high moisture permeability, and appropriate flexibility. As the polyester-based elastomer, “HYTREL” polyester-based elastomer manufactured by DuPont is preferable. Since the laminate film requires sufficient waterproofness, it is preferably a film formed by extrusion molding, blow molding or the like, and a stretched film can also be used. As the laminate film, a multilayer film in which films made of different materials are laminated can also be used.

The film used for the laminate needs to be made thinner to secure the moisture permeability if the moisture permeability of the film material is low, and it can be made thicker if the moisture permeability is high. It is necessary that the film has an appropriate rigidity when it is laminated, and in view of this, the thickness of the film is generally preferably 50 μm or less, and 2
˜30 μm is particularly preferable, and further preferably 5 to 15 μm. By laminating a film on a non-woven fabric, it becomes easy to balance the physical properties, so that it is possible to use a wide range of non-woven fabrics, especially so-called thin non-woven fabrics, and to improve strength and chemical resistance. The sex can also be improved easily. The method of laminating the film on the non-woven fabric is not particularly limited, but a method of using an adhesive for adhesion, a method of heat fusion, and the like can be used. Lamination may be performed on the nonwoven fabric before applying the pressure sensitive adhesive or after applying the pressure sensitive adhesive.

The pressure-sensitive adhesive used in the pressure-sensitive adhesive adhesive film of the present invention is not particularly limited as long as it has little irritation to the skin and has pressure-sensitive adhesiveness to the skin. A rubber-based pressure-sensitive adhesive, an acrylic pressure-sensitive adhesive Agents, polyurethane-based adhesives, silicone-based adhesives, styrene-isoprene-styrene type block copolymer-based adhesives, etc. can be used. Such an adhesive can be applied to the entire adhesive surface of the non-woven fabric, but in order to prevent a decrease in moisture permeability, a porous adhesive is applied or a pattern is applied without applying the adhesive to the entire surface. -It is preferable to coat.

As a method for making the pressure-sensitive adhesive porous, for example, a super absorbent polymer is used as an air-permeable agent, and after sufficiently absorbing water, it is dispersed in a pressure-sensitive adhesive solution, and after coating,
There is a method of making the material porous by evaporating water, but the method is not particularly limited to this method. The pattern coating can be carried out, for example, by adopting a screen coating method or a gravure coating method when the pressure-sensitive adhesive is coated on the substrate. It is not particularly limited to these. As a method of applying the adhesive to the substrate, a method of directly applying the adhesive to the nonwoven fabric or after applying the adhesive to release paper,
Various known methods such as a method of transferring to the non-woven fabric can be adopted.

In the first-aid bandage using the adhesive film for a first-aid bandage according to the present invention, a sheet-shaped bandage is cut into individual first-aid bandages, which is indicated by reference numeral 5 in FIG.
Also, an exposed portion of the non-woven fabric is generated at the edge portion indicated by the diagonal lines in FIG. 2, and water or a surfactant solution penetrates from the edge portion. Therefore, by sealing the edge portion with a heat seal or pressure bonding The waterproof performance can be improved. This sealing treatment may be performed on the sheet-shaped adhesive plaster before it is cut into individual adhesive plasters or after it is cut into individual adhesive plasters. The width of this sealing treatment is not particularly limited as long as it can prevent water or a surfactant solution from entering from the edge portion, but is preferably 0.5 to 4 mm.
And particularly preferably 1 to 2 mm. The adhesive film for a first-aid bandage of the present invention, from the film surface,
It is possible to almost completely prevent entry of liquids such as water and surfactant solutions. Further, by sealing the edge portion, it is possible to completely prevent the intrusion of liquid such as water and a surfactant solution. The adhesive film for a first-aid bandage of the present invention may be a bandage by any method, but as a method thereof, for example, a film having an appropriate long width, a method of winding the film into a first-aid bandage, and a suitable size of the film -A sheet, holding a water-absorbent pad in the center of the sheet, and then covering the adhesive surface with release paper to form an individual wrapping of the bandage that has been wrapped, using a sheet of appropriate size, without placing the pad An example of such a method is a method in which a sticking plaster whose adhesive surface is covered with release paper is wrapped to form an individual package. Hereinafter, the present invention will be described more specifically with reference to examples.

[0011]

EXAMPLES In this example, evaluation of each physical property was carried out according to the following methods. (1) Modulus: Sample width 25.4 mm (1 inch)
It is cut into a ribbon shape and attached to a tensile tester with an interval of 50 mm. The load when the sample piece was stretched by 5%, 10% and 100% was measured at a tensile rate of 100 mm / min to determine the stress per 1 cm of the sample width. (2) Tensile strength at break, tensile elongation at break: sample width 25.4
Cut into mm (1 inch) and set in a tensile tester with a gap of 50 mm. With a pulling speed of 100 mm / min,
The load and elongation when the test piece was cut were measured. (3) Adhesion to glass: The sample was cut into a width of 25.4 mm (1 inch), attached to a glass well washed with acetone, and attached with a roller having a weight of 4.5 kg and a rubber wound on an iron core.
Attach a reciprocating load to the tensile tester. The tensile speed was set to 300 mm / min, and the load at which the test piece peeled from the glass surface was measured.

(4) Water vapor transmission rate: A sample film was attached to a ring of a water vapor transmission cup defined in JIS Z 0208,
Securely attach it to the guide containing the dish containing water. Put this in a constant temperature / humidity chamber at 32 ℃, 30RH%,
The weight is measured every hour, and the measurement is repeated until the difference in weight per hour becomes stable. From the change in weight per hour, the moisture vapor transmission rate (g
/ M ² · 24 hours) was calculated. The water vapor transmission rate of human skin is considered to be about 1000 g / m ² · 24 hours. Therefore, the moisture permeability was evaluated according to the following criteria. 1500 (g / m ² · 24 hours) or more ^{◎ 1500~800 (g / m 2 ·} 24 ^{hours) ○ 800~300 (g / m 2} · 24 ^{hours) △ 300 (g / m 2} · 24 hours) than × (5) Waterproofness: Drop 0.1 ml of water or 0.75% detergent aqueous solution from a height of 2 cm on the surface of the sample in an indoor environment. The time from when the liquid was dropped to when the liquid completely penetrated into the sample was measured. Comparing the evaluation result by this method and the state when actually applied to the skin, when the liquid penetrates into the sample within 1 hour by this method, the expansion and contraction of the film, the skin etc The liquid easily penetrated into the bandage due to rubbing and the like, and no waterproof property was observed. On the other hand, in the case of not permeating for 3 hours or more, substantially no permeation was observed during actual use. Therefore, the waterproofness was evaluated according to the following criteria. Water resistance 3 hours or more ◎ Water resistance 1 to 3 hours △ Water resistance less than 1 hour ×

Example 1 A styrene-isoprene-styrene type block copolymer having a polystyrene content of 27% by weight and polypropylene were mixed in a pellet state so that the polypropylene content was 30% by weight. This is melt-mixed with an extruder, then discharged with a melt-blow spinning device to be fiberized, collected,
Non-woven fabric was obtained by thermocompression bonding (trade name: Septon, manufactured by Kuraray Co., Ltd.). The basis weight of the nonwoven fabric was 70 g / m ² . A polyurethane film having a thickness of 10 μm (manufactured by Tokunaga Trading Co., Ltd.) was laminated on one side of this non-woven fabric by heat fusion. Then, an acrylic pressure-sensitive adhesive in which a highly water-absorbent polymer (trade name: Sunwet, manufactured by Sanyo Kasei Co., Ltd.) is dispersed as a breathing agent is applied to the non-woven fabric side so as to have a thickness of 50 μm, and dried. Thus, a pressure-sensitive adhesive film for a first-aid bandage having the acrylic pressure-sensitive adhesive as a porous material was obtained. Using this adhesive film as a sample, according to the above method, (1) modulus, (2) tensile breaking strength and tensile breaking elongation,
(3) Adhesion to glass, (4) moisture permeability, and (5) waterproofness were measured, and the evaluation results are shown in Table 1.

[0014]

[Table 1]

Example 2 An adhesive film for a first-aid bandage was obtained by the same operation as in Example 1 except that the basis weight of the nonwoven fabric was 50 g / m ² . This adhesive film was evaluated in the same manner as in Example 1. The results are shown in Table 1. Example 3 One side of a nonwoven fabric (manufactured by Kuraray Co., Ltd.) having a basis weight of 50 g / m ² in which polyurethane elastic filaments were laminated and heat-sealed,
The polyurethane film having a thickness of 10 μm used in Example 1 was laminated by heat fusion, and the non-woven fabric surface side was coated with an acrylic pressure-sensitive adhesive having a highly water-absorbent polymer dispersed therein as a ventilation agent and dried. The adhesive film for a first aid bandage was obtained by making it porous, and evaluated in the same manner as in Example 1. The evaluation results are shown in Table 1.

Example 4 Weight per unit area of polyester elastic filaments 50 g /
Example 1 was applied to one side of a m ² non-woven fabric (Kuraray Co., Ltd.)
The 10 μm-thick polyurethane film used in 1. was laminated by heat fusion, and the non-woven fabric side was coated with an acrylic pressure-sensitive adhesive having a highly water-absorbent polymer dispersed as a breathing agent and dried to make it porous. Then, an adhesive film for a first aid bandage was obtained and evaluated in the same manner as in Example 1. The results are shown in Table 1.

Example 5 A styrene-isoprene-styrene type block copolymer having a polystyrene content of 27% by weight and polypropylene were mixed in the form of pellets so that the polypropylene content would be 20% by weight. This is melt-mixed with an extruder, then discharged with a melt-blow spinning device to be fiberized, collected,
Non-woven fabric was obtained by thermocompression bonding (trade name: Septon, manufactured by Kuraray Co., Ltd.). The weight of the non-woven fabric was 50 g / m ² . A 25 μm thick polyester elastomer film (trade name: Hytrel, manufactured by DuPont) was laminated on one surface of this non-woven fabric by heat fusion. Then, an acrylic pressure-sensitive adhesive in which a highly water-absorbent polymer (trade name: Sunwet, manufactured by Sanyo Kasei Co., Ltd.) is dispersed as a breathing agent is applied to the non-woven fabric side so as to have a thickness of 50 μm, and dried. Thus, a pressure-sensitive adhesive film for a first-aid bandage having the acrylic pressure-sensitive adhesive as a porous material was obtained. This adhesive film was evaluated in the same manner as in Example 1. The results are shown in Table 1.

Example 6 A styrene-isoprene-styrene type block copolymer having a polystyrene content of 27% by weight and polypropylene were mixed in a pellet state such that the polypropylene content was 20% by weight. This is melt-mixed with an extruder, then discharged with a melt-blow spinning device to be fiberized, collected,
Non-woven fabric was obtained by thermocompression bonding (trade name: Septon, manufactured by Kuraray Co., Ltd.). The weight of the non-woven fabric was 50 g / m ² . On one side of this non-woven fabric, a polyolefin porous film having a thickness of 50 μm (KT-50, manufactured by Mitsubishi Kasei Kogyo Co., Ltd.)
Was laminated by heat fusion. Then, an acrylic pressure-sensitive adhesive in which a highly water-absorbent polymer (trade name: Sunwet, manufactured by Sanyo Kasei Co., Ltd.) is dispersed as a breathing agent is applied to the non-woven fabric side so as to have a thickness of 50 μm, and dried. Thus, a pressure-sensitive adhesive film for a first-aid bandage having the acrylic pressure-sensitive adhesive as a porous material was obtained. This adhesive film was evaluated in the same manner as in Example 1. The evaluation results are shown in Table 1.

Example 7 A styrene-isoprene-styrene type block copolymer having a polystyrene content of 27% by weight and polypropylene were mixed in a pellet state so that the polypropylene content would be 20% by weight. This is melt-mixed with an extruder, then discharged with a melt-blow spinning device to be fiberized, collected,
Non-woven fabric was obtained by thermocompression bonding (trade name: Septon, manufactured by Kuraray Co., Ltd.). The weight of the non-woven fabric was 50 g / m ² . A porous vinyl chloride film having a thickness of 50 μm (VP-50, manufactured by Mitsubishi Kasei Kogyo Co., Ltd.) was laminated on one surface of this non-woven fabric by heat fusion. Then, on this non-woven fabric side, a highly water-absorbent polymer (trade name: sun wet,
An acrylic adhesive having Sanyo Kasei Co., Ltd. dispersed therein was applied so as to have a thickness of 50 μm, and dried to obtain an adhesive film for a first-aid bandage in which the acrylic adhesive was porous. This adhesive film was evaluated in the same manner as in Example 1. The evaluation results are shown in Table 1.

Comparative Example 1 A vinyl chloride film having a thickness of 75 μm (manufactured by Johnson & Johnson Co., Ltd.) was used as a base material, and a raw rubber adhesive was applied as an adhesive on one side to a thickness of 50 μm. An adhesive film similar to that used in commercial first-aid bandages was obtained. The evaluation results are shown in Table 1. In the sample of Comparative Example 1, as a result of low moisture permeability, skin breathing is impeded, and skin irritation may occur due to unevenness. From this result, it is understood that when a polyvinyl chloride film is used, it is necessary to ensure moisture permeability and it is necessary to take some measures such as making a hole in the film.

Comparative Example 2 The nonwoven fabric used in Example 1 was waterproofed with a fluororesin. As in Example 1, one side of this nonwoven fabric was coated with an acrylic pressure-sensitive adhesive having a superabsorbent polymer dispersed therein as a breathing agent so as to have a thickness of 50 μm, and dried to make the acrylic pressure-sensitive adhesive porous. The adhesive film for a first aid bandage was obtained. The evaluation results are shown in Table 1. It can be seen that in the case of a non-woven fabric without a laminate film, the waterproofness against soapy water is poor even if waterproof treatment is carried out, which is not preferable.

Summarizing the results in Table 1, the adhesive film for a first-aid bandage of the present invention is highly flexible, has excellent fit with the skin, and because of its excellent moisture permeability, it does not interfere with skin breathing and is stuffy. It is possible to prevent the harmful effects caused by the above. In addition, by laminating a moisture-permeable film to the nonwoven fabric, it is possible to prevent the infiltration of liquid such as water into the absorbent pad and the affected area, the breaking strength is strengthened, and fluff and dirt caused by rubbing the nonwoven fabric are also generated. It turns out that it can be prevented.

[0023]

The first-aid bandage using the adhesive film for a first-aid bandage of the present invention is flexible by making the base fabric a laminated nonwoven fabric having elasticity and moisture-permeable and waterproof film. With its excellent moisture permeability and excellent moisture permeability, it not only prevents the skin from breathing and prevents skin irritation caused by stuffiness, etc., but also completely absorbs water, detergent liquid, etc. into the absorbent pad and affected areas. It is possible to prevent the invasion of bacteria into the wound. This prevention of penetration can be made more complete by sealing the edge portion of the first aid bandage with a heat seal or the like. Further, by using the above-mentioned laminate film, it is possible to improve the breaking strength and abrasion resistance of the first-aid bandage, and further improve the operability when the first-aid bandage is applied to the affected part.

[Brief description of drawings]

FIG. 1 is a plan view of an example of the first-aid bandage of the present invention.

FIG. 2 is a front view of an example of the first-aid bandage of the present invention.

[Explanation of symbols]

1 ... Base cloth, 2 ... Adhesive layer, 3 ... Release paper,
4 ... Pad, 5 ... Edge

Claims (9)

[Claims] 1. A pressure-sensitive adhesive film for a first-aid bandage, comprising a breathable and stretchable non-woven fabric coated with an adhesive on one side,
An adhesive film for a first-aid bandage, characterized in that the surface of the non-woven fabric side is laminated with a film having moisture permeability and waterproof property, and an edge portion thereof is sealed. 2. A pressure-sensitive adhesive film for a first-aid bandage, wherein a pressure-sensitive adhesive is applied to one surface of a nonwoven fabric having breathability and stretchability,
The surface of the non-woven fabric side is laminated with a film having moisture permeability and waterproofness selected from the group consisting of a polyurethane film, a polyester elastomer film, a polyolefin porous film, and a porous polyvinyl chloride film. Adhesive film for first aid bandages. 3. The adhesive film for a first-aid bandage according to claim 2, wherein the edge portion is sealed. 4. The pressure-sensitive adhesive bandage adhesive film according to claim 1, wherein the edge portion is sealed by heat sealing or pressure bonding. 5. The adhesive film for a first-aid bandage according to any one of claims 1 to 4, wherein the non-woven fabric is made of a styrene-isoprene-styrene type block copolymer. 6. The adhesive film for a first-aid plaster according to any one of claims 1 to 5, wherein the non-woven fabric comprises hydrogenated styrene-isoprene-styrene type block copolymer and polypropylene. 7. The pressure-sensitive adhesive film for a first-aid bandage according to claim 1, wherein the pressure-sensitive adhesive is porous. 8. The adhesive film for a first-aid bandage according to claim 1, wherein the adhesive is patterned and coated. 9. A first-aid bandage using the adhesive film for a first-aid bandage according to any one of claims 1 to 8.