JPH0226869Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improved packaging body that makes it possible to protect products from moisture, oxygen, and other gases that are harmful to the products when they are stored.

There are many products such as pharmaceuticals, enzymes, medical devices with these immobilized on solid surfaces, and various foods whose performance gradually deteriorates due to moisture, oxygen, etc. in the air. Therefore, when packaging these products, an important issue for storing these products is how to prevent the products from coming into contact with harmful ingredients.

Conventionally, when packaging products that required moisture and gas barrier properties, desiccants and degassing agents were packaged separately and enclosed in the product packaging bag, but the packaging bag containing the drug was used for the product. If the bag containing the drug is torn, the product will be contaminated. Furthermore, when the product package is opened, the packaging bag containing the medicine comes out at the same time as the product, and if the product is food, there is a risk of accidental ingestion.

Next, in order to eliminate these drawbacks, it has been considered to install a partition wall using breathable Heatron paper, etc., and store the product on one side and desiccant etc. on the other. Because there is paper (Fig. 4 C) in the cross section of the seal part (for example, Fig. 4 F),
Gas, water vapor, etc. enter from paper, and sufficient gas barrier properties, water vapor barrier properties, etc. cannot be obtained.

In addition, because the partition walls are made of paper, they do not have the strength of high-density polyethylene nonwoven fabric, and if external force is applied to the bag during transportation, the paper partition walls may tear and the product and medicine may be lost. The shortcomings such as storage are not resolved.

Furthermore, in order to eliminate the disadvantages of using Heatron paper as described above and the inconvenience that the product and the drug come out at the same time when taking out the product, for example, as described in Japanese Utility Model Publication No. 56-51506, Plastic film with holes drilled in the partition wall is used, and a special seal is provided only in the drug storage area near the outlet, but the plastic film with holes used in the partition wall The pore size is incomparably larger than that of high-density polyethylene nonwoven fabric, and if the drug is destroyed by external force, the broken and reduced size of the drug will transfer to the product through the holes, and the product and drug will be in contact with each other. The disadvantage of storing it away still remains.

Furthermore, since the pore size is large, it is not resistant to microbial permeation, and is therefore not suitable as a packaging bag for the above-mentioned medical instruments.

Furthermore, the bag must be opened as a whole, and even if an opening cut is provided, it is difficult to open the bag easily. (Fig. 4) This invention provides a packaging that can protect products from moisture, oxygen, and other gases that are harmful to products when they are stored, and that eliminates the above-mentioned drawbacks. be.

That is, the present invention interposes a high-density polyethylene nonwoven fabric coated with a resin for easy peeling on one side between two exterior films or sheets that have moisture and/or gas barrier properties and whose inner surfaces are heat-sealable. A packaging body characterized in that one exterior film or sheet can be easily peeled off and the other exterior film or sheet cannot be easily peeled off by at least welding the peripheral portion. It is.

According to the present invention, a desiccant, an oxygen scavenger, or a gas absorbent such as activated carbon is inserted between the exterior film or sheet that cannot be easily peeled off and the high-density polyethylene nonwoven fabric, and the other side is easily removed. By placing the product between the removable exterior film or sheet and the high-density polyethylene nonwoven fabric, the gas absorbent will not come out with the product when the product is taken out, and the gas absorption To provide a packaging body from which even if the drug is destroyed, there is no risk of contaminating the product with the destroyed drug, and the product can be easily taken out.

Moreover, the package according to the present invention can be suitably used for pharmaceuticals and medical instruments that require sterilization.

In other words, after storing the product, pass it through a polyethylene nonwoven fabric while sealing only the side where the product was stored, sterilize it with ethylene oxide gas, etc., then fill the other side with a gas absorbent and seal. It is possible to take out the product aseptically without exposing the gas absorbent storage side which has not been sterilized, that is, is contaminated with bacteria.

The package according to this invention will be specifically explained below based on the drawings.

A high-density polyethylene nonwoven fabric (spunbond material) such as Dupont's spunbonded olefin Tyvek, for example, is placed between two exterior films or sheets 2 and 3 that have moisture and/or gas barrier properties and can be heat-sealed on the inner surface. 1059B,
A nonwoven fabric 4 having small pores that is breathable and impermeable to bacteria, such as 1073B, is inserted and welded by heat sealing or the like.

When welding, if necessary, maintain the airtightness of the sealing surface on the nonwoven fabric surface and eliminate the air permeability of the nonwoven fabric to prevent gas from entering from the sealed area.
It is necessary to collapse the small pores in the nonwoven fabric using heat and pressure during heat sealing.

Other examples of exterior films or sheets that have moisture-proof and/or gas barrier properties and whose inner surfaces are heat-sealable include laminates of stretched vinylon film and polyolefin film, and laminates of polyethylene/polyvinyl alcohol copolymer films and polyolefin sheets. Examples include laminates, laminates of various plastic films coated with polyvinylidene chloride and polyolefin films, laminates of various plastic films, aluminum foil, and polyolefin films, and the like.

Among these, laminates of various plastic films, aluminum foils, and polyolefin films are particularly preferred because they have excellent moisture-proofing properties and gas-barrier properties.

For laminated heat sealing, the outer film or sheet 2 on the back side (the side containing chemicals such as oxygen absorbers)
The peripheral seal between the and nonwoven fabric 4 is heat-sealed so that it cannot be peeled off (if peeled, the aluminum body will break) by using polyethylene or the like, which is the same material as the nonwoven fabric, for the exterior film or sealant of the sheet 2.

Next, the peripheral seal between the exterior film or sheet 3 on the surface (product enclosing side) and the nonwoven fabric 4 is heat-sealed so that it can be peeled off by coating the nonwoven fabric with an olefin-based or ester-based coating agent. Ru.

That is, the sealing surface 7-2 on the back side (drug enclosing side)
is welded irremovably, and the seal surface 7-1 on the surface (product enclosing side) is welded removably, but in both cases, when welding, the small pores of the nonwoven fabric are crushed by pressure and temperature to create an airtight seal. do.

Therefore, the product-filled side on the front side and the drug-filled side on the back side are stored in a state completely free of oxygen, etc. in the bag after the drug is sealed until the product is ready for use.

When using the product, as shown in FIG. 3, the outer film or sheet 3 is peeled off from one side to take out the product and use it.

That is, the exterior film or sheet has perfect gas barrier properties, and by using high-density polyethylene nonwoven fabric for the partition walls, perfect airtight welding is possible by keeping the heat sealing conditions constant. In addition, the above-mentioned high-density polyethylene spunbond nonwoven fabric has excellent chemical resistance and is a small-porous nonwoven fabric, so it prevents the infiltration of bacteria, etc. or fine chemicals, and at the same time prevents harmful gases (e.g. Oxygen) to help absorption with drugs for removal,
This makes it possible to completely remove residual gas in the bag.

As mentioned above, the packaging body according to this invention completely removes harmful gases by wrapping medical instruments, materials, etc. in a high-density polyethylene nonwoven fabric together with a gas-absorbing drug, and also maintains sterile and airtight conditions. In addition to storing the product in the same condition, when using the product, only the product can be taken out and used by peeling off the outer film or sheet on the product enclosing side without opening the drug enclosing side.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a packaging bag according to an embodiment of the present invention. FIG. 2 is also a plan view. Figure 3 is a sectional view of the open state when taking out the product. FIG. 4 shows a sectional view of an example of a conventional packaging body. In the figure, 1...packaging body, 2...exterior film or sheet (for back side), 3...exterior film or sheet (for front side), 4...high density polyethylene nonwoven fabric,
5...Accommodated product, 6...Gas absorbent, 7...Peripheral heat seal part, A...Exterior film or sheet, B...Partition paper or perforated film, C...
Welding part (partition part) D...Contents, E...Drying agent, F...Heat sealing part.

Claims (1)

[Scope of utility model registration request] A high-density polyethylene nonwoven fabric coated with a resin for easy peeling on one side is interposed between two exterior films or sheets that have moisture and/or gas barrier properties and can be heat-sealed on the inner surface to seal the periphery. 1. A packaging body characterized by being welded so that one exterior film or sheet can be easily peeled off, and the other exterior film or sheet cannot be easily peeled off.