JP2007302292A - Air permeable package and its component member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air permeable package suitably used as a package of a medical instrument achieving perfect sealing, reduction of time for sterilizing medical instruments and complete removal of a sterilizing gas and further preventing the medical instrument from being contaminated by dispersion of fine fibers, in a wide bonding condition in a case of relaxing the bonding condition. <P>SOLUTION: An air permeable package 1 has a plastic sheet 2 on one face totally consisting of a single sheet and two sheets on the other face, i.e., an air permeable sheet 4 and a plastic film 3 coated with an easy peeling heat-sensitive adhesive agent 6, and is formed by heat fusing the plastic sheet 2 and the air permeable sheet 4 and bonding the plastic sheet 2, the plastic film 3 and the air permeable sheet 4 to each other with the easy peeling heat-sensitive adhesive agent. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

TECHNICAL FIELD The present invention relates to a package having air permeability, and more particularly to a package suitable for packaging and storage for medical devices and a component thereof, which can satisfactorily perform sterilization treatment and maintenance of a sterilized state using air permeability. Belongs to the packaging technology field.

  Many medical devices including syringe needles and syringes need to be stored in sealed containers in a state in which the sterilized state is maintained after being sterilized, and various sealed containers are provided for this purpose. ing.

  For example, in JP-A-10-129720 (Patent Document 1), as a gas sterilization package for sterilizing and hermetically storing medical instruments and the like, the breathability of a breathable nonwoven fabric sheet used for sterilization treatment is When it is damaged by the heat sealant for bonding or when it is opened, the bonded non-woven sheet breaks in the fibrous layer, scatters fine fibers, and contaminates the stored medical device. A package that eliminates the problem has been proposed.

  The package for gas sterilization proposed in Patent Document 1 is obtained by superposing a breathable nonwoven fabric sheet and a synthetic resin sheet coated or laminated with an easily peelable heat sealant on the inner surface, and the superposed sheet. It is characterized by being bonded and sealed to each other along the outer peripheral edge of each other.

  Further, in Japanese Patent No. 3376542 (Patent Document 2), a complete sealing is possible, a sterilization process does not take time, and a packaging structure with little residual gas is provided. Adhesive to be used, and the adhesive to be used is peeled off from the bonded packaging material body and the sterilization sheet, and the adhesive melted by heating remains in both the sterilization sheet and the packaging material body. In addition to having properties, an adhesive layered on a packaging material body has been proposed.

Furthermore, in Japanese Patent Application Laid-Open No. 11-193067 (Patent Document 3), a synthetic resin container body provided with a peripheral edge for bonding on the outer periphery of an opening surface, a transparent resin sheet capable of heat seal bonding, and heat seal bonding. A container comprising a lid sheet body made of a polyethylene non-woven fabric dot-coated with an agent has been proposed.
JP-A-10-129720 (Claims) Japanese Patent No. 3376542 (Claims) JP-A-11-193067 (Claims)

  The packaging bodies described in Patent Documents 1 and 2 both prevent the passage of air, such as a sheet having air permeability that allows passage of air, such as a nonwoven fabric sheet, and a bacteria barrier property that prevents passage of bacteria. Uses a synthetic resin sheet that is air-impermeable and has a bacterial barrier property that prevents bacteria from passing, and a heat sealant or hot melt adhesive is laminated on the synthetic resin sheet side, allowing complete sealing In addition, the sterilization process does not take much time, there is almost no residual sterilization gas, the sterilization gas does not adversely affect the human body, and has an excellent effect of being easy to work. It is recognized that

  When the container described in Patent Document 3 is used for a food processing container, since the packaging materials described in Patent Documents 1 and 2 are both made of an opaque material such as a nonwoven sheet. The finish of the food cannot be seen without removing the lid from the container. Also, depending on the oil from the food, the polyethylene non-woven fabric may be discolored and deteriorated, resulting in poor appearance and not suitable for heat processing of food containing oil. In addition, when used for sterilization of medical equipment, the confirmation of the sterilized medical equipment is blocked by the sheet-like lid, so a mark is placed on the container separately so that the medical material placed in the container can be identified. This eliminates the disadvantages that are required to be included.

However, the heat sealing agent or hot melt adhesive used in the proposals of Patent Documents 1 and 2 is not only simply bonding the nonwoven fabric sheet and the synthetic resin sheet, but is easily peelable, or When peeling, the function that the adhesive melted by heating and melting has a property of remaining in both the sterilization sheet and the packaging material body is required.
Therefore, the heat sealant or hot melt adhesive to be used must be carefully selected according to the material of the nonwoven fabric sheet and the synthetic resin sheet. If the conditions and the like are not accurately managed, there is a problem that the intended effect cannot be obtained.

  In addition, the container proposed in Patent Document 3 is such that a part of the lid sheet body is made a transparent sheet, and properties such as easy confirmation of contents are given. Adhesion uses a heat seal adhesive that is dot-coated on a polyethylene non-woven fabric, and leaves the problems solved by the proposals of Patent Documents 1 and 2. In addition, there is a balance with the required transparency, and the nonwoven fabric constituting the lid sheet body must be small so that problems do not occur. It is small and has a hard time taking out contents.

  The inventor has relaxed such problems, in particular, the bonding conditions at the time of bonding, in other words, even in a wide bonding condition, the above-mentioned effects, that is, complete sealing, shortening the time for medical instrument sterilization treatment In addition to the absence of sterilization gas, etc., in particular, intensive studies were conducted to provide a breathable package suitable for a medical instrument package that does not contaminate the medical instrument due to the scattering of fine fibers.

As a result, the inventor said that the above-described problem is that the sheet constituting one surface of the package is composed of a breathable sheet such as a nonwoven fabric and a plastic film, and the breathable sheet is firmly formed with the plastic sheet on the other surface. It was found that the peeling part at the time of bonding and opening can be solved by making the plastic film and the breathable sheet a plastic sheet bonded with an easily peelable heat-sensitive adhesive. It was completed.

That is, the invention according to claim 1 of the present invention is
One side consists of two sheets: a plastic sheet, the other side a breathable sheet and a plastic film coated with an easily peelable heat-sensitive adhesive,
A part of each edge portion of the plastic sheet and the breathable sheet is heat-sealed,
The edge part of the plastic sheet to which the breathable sheet is not fused and a part of the edge part of the plastic film coated with the easily peelable heat-sensitive adhesive are interposed via the easily peelable heat-sensitive adhesive. Glued
The breathable sheet that is not fused or bonded to the plastic sheet and each edge of the plastic film are bonded via an easily peelable heat-sensitive adhesive with the plastic film facing the surface. It is a breathable package characterized by the above.

The invention according to claim 2 of the present invention is
The breathable package according to claim 1,
The breathable sheet is
It has a function of blocking the passage of bacteria.

The invention according to claim 3 of the present invention is
The breathable package according to claim 1 or 2,
The breathable sheet is
It is a non-woven fabric or sterilized paper made of synthetic resin.

The invention according to claim 4 of the present invention is
In the air-permeable package according to any one of claims 1 to 3,
The easily peelable heat-sensitive adhesive is
It is made of a polyethylene-based or polypropylene-based resin.

The invention according to claim 5 of the present invention is
The breathable package according to claim 1,
The easily peelable heat-sensitive adhesive is
The coating thickness is 1 to 50 μm.

The invention according to claim 6 of the present invention provides
The breathable package according to claim 1,
The plastic sheet is
It is a single-layer or multi-layer plastic sheet.

The invention according to claim 7 of the present invention provides
The breathable package according to any one of claims 1 to 6,
The plastic film is
It has an edge portion that becomes a grip portion when the plastic film is peeled off from the plastic sheet and the breathable sheet outside the edge portion bonded to the breathable sheet. It is what.

The invention according to claim 8 of the present invention provides
The breathable package according to claim 7,
The holding part of the plastic film is
The air-permeable sheet has an area that can cover the entire surface of the air-permeable sheet.

Furthermore, the invention according to claim 9 of the present invention is
9. The breathable packaging body according to any one of claims 1 to 8, comprising a heat-sealable plastic sheet, a breathable sheet, and a plastic film coated with an easily peelable heat-sensitive adhesive. It is a structural member.

Furthermore, the invention according to claim 10 of the present invention provides
In the component for air-permeable packaging according to claim 9,
The heat-sealable plastic sheet and a plastic film coated with an easily peelable heat-sensitive adhesive are integrated.

  In the breathable packaging body of the present invention, the breathable sheet forming the packaging body is heat-sealed and firmly bonded to the plastic sheet, and when the packaging body is opened, the breathable sheet is the plastic sheet. Therefore, the problem of contaminating medical devices due to the scattering of fine resin powders and fiber powders generated at the time of peeling cannot exist at all.

  In addition, since no adhesive is applied to the air-permeable sheet, almost the entire surface of the air-permeable sheet allows passage of sterilization gas for sterilization, so that the sterilization process does not take time and is sterilized. The gas does not remain in the package, and the human body is not adversely affected by the sterilized gas present in the package.

  Further, the heat-sealing of the air permeable sheet and the plastic sheet can be performed by heat melting of the plastic sheet, and even if the air permeable sheet has a paper quality such as sterilized paper, it can be performed without any problem. Of course, if the plastic sheet is difficult to heat-seal, such as polyethylene terephthalate, it is sufficient to use a laminate of polyethylene on the inner surface, and this does not cause any problems.

  In addition, since the plastic sheet and film that are bonded via an easily peelable heat-sensitive adhesive are both plastic and have the same shape, especially when using the same material, the application area for bonding, The application amount, further heating conditions, pressure conditions, etc. can be performed without strict management as in the conventional case, and the bonding process can be simplified.

  Furthermore, since the adhesion between the breathable sheet and the plastic film is bonded via an easily peelable heat-sensitive adhesive, the problem of adhesion between different materials remains, but the outer surface of the breathable sheet, that is, the container Adhesion on the outside, which significantly reduces the occurrence of problems compared to conventional ones.

Furthermore, since the breathable sheet and the plastic film are bonded with an easily peelable heat-sensitive adhesive, they can be easily opened when the contents are taken out, and the outlet is enlarged. Therefore, there is no problem in taking out contents such as medical instruments. In particular, by providing a gripping portion at the edge of the plastic film, opening becomes easier.

  Hereinafter, the breathable package according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a cross-sectional view of the breathable package of the present invention, and FIG. 2 is a front view for explaining the bonding state of each component of the breathable package.

  The breathable package 1 of the present invention has a function of blocking the passage of bacteria on one surface of the package 1 in the same manner as the conventional package, for example, the medical package described in Patent Document 1 or 2. Although the sheet 4 is used, it is not used for the entire surface of the packaging body 1 but constitutes one surface of the packaging body 1 in cooperation with the plastic film 3. Is made of a plastic sheet 2 as in the conventional case.

  The plastic sheet 2 only needs to block the passage of air and bacteria, that is, has air permeability and bacterial barrier properties, and a commonly used single-layer or multilayer plastic sheet can be used. A single layer of polyethylene, polypropylene, polyethylene terephthalate, polyvinyl chloride, polystyrene, nylon, etc., or a laminate of any of these, and a multilayer sheet in which an aluminum foil or the like is further laminated, A material that can be heat-sealed to the gas-sensitive sheet 4 by fusion, in particular, a polyethylene terephthalate film laminated with a polyethylene film can be preferably used.

  The plastic sheet 2 can be used as a bag-like package by overlapping the sheet made of the plastic film 3 and the air permeable sheet 4 as shown in FIG. Then, it can be formed into a cup shape and used as a blister pack.

  The plastic film 3 may be any one that prevents air and bacteria from passing through, that is, has an air permeability and a bacteria barrier property, and the same one as the plastic sheet 2 is used. In contrast, since no heat-sealing property is required, a wider variety of single-layer or multi-layer plastic sheets can be used.

These plastic sheet 2 and plastic film 3 can be used as a medical package so as to be compatible with sterilization treatment after storing a medical instrument such as a syringe needle or syringe. In the case of being used for sterilization by high-pressure steam that reaches a temperature of 110 ° C. or higher, a polypropylene sheet or a polypropylene-nylon composite sheet is selected and used.
The thicknesses of the plastic sheet 2 and the plastic film 3 are determined according to the size and weight of a medical device or the like to be stored, but those having a thickness of 1 mm or less are usually used.

  An easily peelable heat-sensitive adhesive 6 is applied to one surface of the plastic film 3 for adhesion to the plastic sheet 2 and the breathable sheet 4.

As this easily peelable heat-sensitive adhesive 6, an adhesive having a lower adhesive strength than the mechanical strength of the resin constituting the plastic sheet 2 or the plastic film 3 forming the package is used.
For example, when polyethylene is selected as the resin for the sheet or film, the easily peelable heat-sensitive adhesive 6 is an ethylene copolymer obtained by copolymerizing other types of polyethylene, vinyl acetate or the like having different properties, particularly adhesive properties, Alternatively, a polyethylene resin such as polyethylene to which a lubricant, a filler, an oil repellent and the like are added is used, or a polypropylene resin is similarly selected and used.

Moreover, in order to peel easily peelable heat-sensitive adhesive 6 without causing a problem at the time of opening, it is preferable to limit the coating thickness, and it is usually preferable to set the thickness to 50 μm or less. If the thickness exceeds 50 μm, the easily peelable heat-sensitive adhesive 6 does not peel at the time of opening, and the above-described problem, that is, resin powder or fiber powder may be generated.
The thickness is determined in consideration of the adhesive strength of the easily peelable heat-sensitive adhesive 6 or the like, but is usually 1 μm or more.

As a method for forming the easily peelable heat-sensitive adhesive 6 on the surface of the plastic film 3, a normal film laminating method or a coextrusion molding method is applied.
They should essentially be formed only on the heat seal part, but forming them over the entire surface can facilitate the work. Incidentally, the easily peelable heat-sensitive adhesive 6 applied to a portion other than the heat seal portion does not exhibit adhesiveness when not heated, and thus does not give any inconvenience to the items stored in the package 1.

  Furthermore, the plastic sheet 2 and the plastic film 3 can be integrated, that is, one sheet or film can be folded, and one surface thereof can be a plastic sheet 2, and the other surface can be a plastic film 3. The aforementioned easily peelable heat-sensitive adhesive 6 can be applied in advance to the inner surface of the plastic film 3 formed by bending.

As the air-permeable sheet 4 that prevents the passage of bacteria, as long as it has air permeability that allows the passage of air, and for sterilization of medical instruments, it is a sheet that has a bacteria barrier property that prevents the passage of bacteria, There are no particular restrictions on the material.
Therefore, natural fibers such as cellulosic fibers, synthetic fibers mainly composed of synthetic resin fibers such as polyethylene, polypropylene, polyethylene terephthalate, and nylon, or composite fibers of natural fibers and synthetic fibers, which are conventionally used for this purpose. A breathable nonwoven fabric sheet or sterilized paper prepared by the above method is used, and in particular, a nonwoven fabric made of polyethylene fibers can be used, and a commercially available product is DuPont Tyvek (trademark).
The air permeable sheet 4 has a size, that is, an area, which is determined according to the air permeability required for the package, and usually has an area of 1/4 to 1/20 of the total surface area of the package. It is done.

  The breathable package 1 using these plastic sheet 2, plastic film 3 and breathable sheet 4 is prepared as follows.

First, the plastic sheet 2 and the air permeable sheet 4 are laminated, and the plastic sheet 2 is heated under pressure in order to thermally melt the plastic sheet 2 and the air permeable sheet 4.
The conditions for pressurization and heating are appropriately selected according to the type and thickness of the resin forming the plastic sheet 2, and the heat-sealed portion 5 is formed.

  Next, a plastic film 3 is laminated on the fusion of the plastic sheet 2 and the breathable sheet 4 so as to form a package 1, and an easily peelable heat-sensitive adhesive coated with the plastic film 3. 6, the plastic film 3 and the plastic sheet 2, and the plastic film 3 and the breathable sheet 4 are heat-sealed.

  As described above, the package 1 prepared by using heat fusion and heat sealing (thermal adhesion) is heat sealed with the easily peelable heat-sensitive adhesive 6, so that the plastic film 3 and It is easy to peel off using the edge part of the plastic sheet 2, and the package 1 is opened.

In order to further facilitate the opening of the package 1, the peeling edge 7 of the plastic film 3 is extended from the heat seal portion of the plastic film 3 and the breathable sheet 4 to constitute the peeling gripping portion 7. Is preferred.
In addition, it is particularly preferable that the gripping portion 7 has an area that can cover the surface of the breathable sheet 4 because the easily contaminated nonwoven fabric and sterilized paper constituting the breathable sheet 4 can be protected.

  The package 1 can be printed with a display of contents, a manufacturer's name, or an instruction manual, and a label indicating the contents. Printing can also be applied after preliminarily printing on a film, sheet or the like constituting the package 1 and applying a protective coating if necessary.

  The breathable packaging body 1 of the present invention is suitable for storing medical devices such as syringe syringes, and when preparing the packaging body 1 described above, particularly when preparing the packaging body 1 by laminating the plastic film 3. In a state in which the stored items are stored, the plastic film 3, the plastic sheet 2, and the breathable sheet 2 are heat-sealed with a sealer or the like equipped with a heating body, so that they are fixed and the stored items are completely It is to be sealed.

The stored items sealed with these sheets and films can be sterilized using a gas sterilizing agent such as ethylene oxide, high-pressure steam, hydrogen peroxide, etc. by utilizing the breathability of the breathable sheet 4.
Since the gas sterilant passes through the entire surface excluding the fused portion of the breathable sheet 4, the passage of the gas sterilant is not restricted.
For this reason, time is not required for the sterilization treatment, and the residue of the gas sterilant in the sealed interior can be almost eliminated by repeating the replacement action.

By removing the heat-sealed portion between the plastic film 3 and the air-permeable sheet 4 and further the heat-sealed portion between the plastic sheet 2 and the sealed material, the air-permeable package 1 can be opened and taken out. become.
At the time of opening, the easily peelable heat-sensitive adhesive 6 is broken or peeled off at the interface, so that the breathable sheet 4 is damaged, the fiber powder is scattered, and the resin powder is scattered from the film or sheet. Absent.

As described above, the breathable package of the present invention dramatically reduces the contamination of the stored matter caused by the destruction of the breathable sheet while maintaining the characteristics of conventional products, due to resin powder and fiber powder. Therefore, it is used more widely in various industries, in particular, as a medical packaging body, not only in the medical field but also in the medical product supply industry.

It is sectional drawing which shows an example of the air permeable package concerning this invention. It is a front view explaining the adhesion state of each structural member of the air permeable package in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Breathable package 2 Plastic sheet 3 Plastic film 4 Breathable sheet 5 Thermal fusion part 6 Easy peelable heat-sensitive adhesive

Claims (10)

One side consists of two sheets: a plastic sheet, the other side a breathable sheet and a plastic film coated with an easily peelable heat-sensitive adhesive,
A part of each edge portion of the plastic sheet and the breathable sheet is heat-sealed,
The edge part of the plastic sheet to which the breathable sheet is not fused and a part of the edge part of the plastic film coated with the easily peelable heat-sensitive adhesive are interposed via the easily peelable heat-sensitive adhesive. Glued
The breathable sheet that is not fused or bonded to the plastic sheet and each edge of the plastic film are bonded via an easily peelable heat-sensitive adhesive with the plastic film facing the surface. Breathable packaging body characterized by. The breathable sheet is
The breathable package according to claim 1, which has a function of preventing passage of bacteria. The breathable sheet is
The breathable package according to claim 1 or 2, which is a synthetic resin nonwoven fabric or sterilized paper. The easily peelable heat-sensitive adhesive is
The breathable package according to any one of claims 1 to 3, wherein the breathable package is made of a polyethylene-based or polypropylene-based resin. The easily peelable heat-sensitive adhesive is
The breathable packaging body according to claim 1, wherein the coating thickness is 1 to 50 μm. The plastic sheet is
The breathable package according to claim 1, wherein the breathable package is a single-layer or multi-layer plastic sheet. The plastic film is
It has an edge portion that becomes a grip portion when the plastic film is peeled off from the plastic sheet and the breathable sheet outside the edge portion bonded to the breathable sheet. The breathable package according to any one of claims 1 to 6. The holding part of the plastic film is
The breathable package according to claim 7, wherein the breathable package has an area that can cover the entire surface of the breathable sheet. 9. The breathable packaging body according to any one of claims 1 to 8, comprising a heat-sealable plastic sheet, a breathable sheet, and a plastic film coated with an easily peelable heat-sensitive adhesive. Constituent member. The component for a breathable packaging according to claim 9, wherein the heat-sealable plastic sheet and a plastic film coated with an easily peelable heat-sensitive adhesive are integrated. .