JPS636066Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a gas absorbent package, more specifically,
The present invention relates to a gas absorbent package that can be easily fixed to a plastic film surface by heat sealing.

BACKGROUND ART It is known that gas absorbents such as oxygen scavengers and desiccants are hermetically packaged using a breathable film such as paper or perforated plastic film. Conventionally, such a gas absorbent package has not been fixed to a bag or container for storing an article such as food, but has simply been enclosed in the bag or container together with the article. . Therefore, when an attempt is made to open such an article storage bag or container and take out the contents, the gas absorbent package is also taken out together with the contents. In such cases, accidents often occur where children or the like accidentally open the gas absorbent package and put the gas absorbent into their mouths.

In order to prevent such accidents from occurring, the present invention provides a gas absorbent package with a means that can be fixed to the inner surface of a packaging bag or container for storing articles in advance, and when the gas absorbent package is used, It is firmly fixed to the inner surface of the packaging bag or container, so that when the contents are taken out from the packaging bag or container, they are not discharged together with the contents.

That is, according to the present invention, there is a rectangular breathable film A having a heat-sealing surface formed by laminating and adhering two perforated films with water-resistant and/or oil-resistant paper interposed therebetween; A rectangular film B having a heat-sealing surface having the same length in the direction but a short length in the lateral direction is placed on both lateral ends of the film A with the heat-sealing surface inside, without overlapping. The films A and B are overlapped so that the edges 6 and 7 are formed, and the overlapping edges of the films A and B are heat-sealed with a gas absorbent contained inside. sealing strip 6,
7 is provided.

Next, one example of the embodiment of the present invention will be explained with reference to drawings. Fig. 1 shows a plan view of two films A and B used in the present invention, and Fig. a shows one side 1 of which is a heat sealing surface. The square-shaped breathable film A and Figure b are for the square-shaped film B whose one side 1' is the heat-sealing surface, and film B has the same length in the vertical direction as film A. However, the horizontal length is short. The shaded areas 2, 3, 4, 5 and 2', 3', 4', 5' are bonded when the heat-sealed surfaces 1, 1' are placed on the inside and the overlapping periphery is heat-sealed. Show the face. 6 and 7 indicate both side edges of film A that do not overlap when films A and B are polymerized,
A heat-sealable film strip for immobilizing the gas absorbent package of the present invention is formed.

FIG. 2 is an explanatory cross-sectional view of the gas absorbent package of the present invention, and C is the gas absorbent.

For film A, prepare two sheets of perforated plastic film A and B, and stack the two sheets A and B with water-resistant and/or oil-resistant paper between them.
A sheet having a heat-sealed surface formed by bonding the entire sheet together is applicable. In this case, any bonding method between the layers may be employed, such as bonding with an adhesive, a heat fusion method using a synthetic resin, and a dry lamination method. Further, the order in which each layer is bonded is arbitrary. As the water-resistant and/or oil-resistant paper used in this case, various conventionally known papers including those whose surfaces have been treated to be water-repellent or oil-repellent are used, such as:
Examples of water-resistant paper include paraffin paper, oil paper, asphalt paper, astringent paper, and pure white paper, and examples of oil-resistant paper include parchment paper and pseudo-sulfur paper. In particular, parchment paper and pseudo-parchment paper are preferred as they have water resistance and oil resistance. The thickness of this water-resistant and/or oil-resistant paper is not particularly limited, and can be appropriately determined in consideration of mechanical strength, flexibility, and the like.

In this way, when two perforated plastic films are laminated and adhered to form an integrated sheet through water- and/or oil-proof paper, the pores formed on the surface of the plastic film are The hole is closed (covered) with a water-resistant and/or oil-resistant paper interposed between the holes, and the surface of the water- and/or oil-resistant paper is exposed in the hole.
It has been found that the laminated plastic film thus formed has the property of being breathable through the pores formed in the plastic surface, but not allowing liquid to pass therethrough. For example, if a bag made of this laminated film is used as medicine packaging paper and an oxygen absorber is sealed in it, if the bag is left in the air, the sealed oxygen absorber will react with the oxygen in the air. This confirms that oxygen gas permeated the laminated film surface and entered the interior. On the other hand, even after this oxygen absorber sealed package is submerged in water for about a week, no water enters its interior. This confirms that the laminated film surface does not have water permeability.

The gas permeability through the surface of such a laminated film can be adjusted by the size and number of pores formed in the film surface, that is, the pore area ratio.

P=S×m/A×100 (%) P: Pore area ratio A: Film surface area S: Pore area m: Number of pores present in the film surface In the present invention, a laminated layer with significantly limited air permeability is used. When obtaining a film, the pore area ratio P of at least one of the film and film is set to 5% or less, usually from 0.1 to
It is better to set it to 2%.

When forming such a laminated film, in order to impart heat-sealability to the film, when used as medicine packaging paper, a low-temperature heat-melting film, such as a polyethylene film, is used as the film that forms the inner surface, and a polyethylene film is used as the outer surface. A high-temperature melting film such as polypropylene, nylon, polyester, etc. is used as the film forming the outer surface.

The film formed as described above has air permeability, but its water permeability and/or oil permeability is blocked. If the paper interposed between the film and the hole is water-resistant or oil-resistant, the laminated film is water-impermeable or oil-impermeable, respectively, and if it is water- and oil-resistant, it is resistant to water and oil. On the other hand, it is liquid-impermeable. In this way, the liquid impermeability of the laminated film depends on the properties of the paper interposed between the film and the film, but in this case, the liquid impermeability of the laminated film cannot be achieved no matter how the surface of conventional paper is processed. It is a remarkable thing that cannot be done. For example, even if the paper is waterproof, if it is immersed in water for a long time, water will penetrate and become wet, but this does not happen with such laminated films.

As the film B, any air-permeable or non-air-permeable film may be used as long as it has a sealing surface. Plastic film is generally used as the non-breathable film.

Examples of the gas absorbent C include substances that absorb or adsorb the target gas to be removed, such as an oxygen scavenger, a desiccant, a deodorizer, a carbon dioxide absorbent, and a sulfur dioxide absorbent.

In order to efficiently produce the gas absorbent package of the present invention, it is preferable to use a conventional packaging machine. That is, when this packaging machine is used, two long films A and B are continuously fed downward, and the films A and B are superposed and bonded to the bottom opening and the side opening to form a cylinder. , filling the cylinder with gas absorbent from above, adhering the upper end opening, and separating the gas absorbent package thus formed from the supply films A and B periodically. The desired gas absorbent packaging bodies are continuously produced.

The gas absorbent package of the present invention can be heat-sealed to the inner surface of a plastic film bag or container lid through a sealing strip, an example of which is shown in FIG. In FIG. 3, D indicates a plastic film forming the bag body and container lid body.
The gas absorbent adhesively fixed to the bag body or container lid in this way is different from conventional ones, and as shown in FIG. Because it is strongly fixed, it does not dangle and does not get in the way when putting in and taking out contents such as food, and it does not fall off because it is not subjected to external force from the contents when taking out and putting in the contents. Not at all. Therefore, when the contents are taken out, they are not discharged together, and accidents such as children eating the contents by mistake are prevented.

[Brief explanation of the drawing]

Figures 1a and 1b show plan views of films A and B for packaging the gas absorbent, Figure 2 is a cross-sectional view of the gas absorbent package, and Figure 3 shows the heat sealing of the gas absorbent. This figure shows a state in which the film is adhesively fixed to the inner surface of the film through the adhesive strip. A...Breathable film having a heat sealing surface, B
...Film having a heat-sealable surface, C...Gas absorbent, D...Film forming a bag or container lid, 6, 7... Heat-sealable strip.

Claims (1)

[Claims for Utility Model Registration] (1) A square-shaped breathable film A having a heat-sealing surface formed by laminating and adhering two perforated films with water- and/or oil-proof paper interposed therebetween; and the film A. A rectangular film B having a heat-sealed surface with the same length in the vertical direction but a shorter length in the lateral direction is attached to both lateral ends of the film A with the heat-sealed surface inside. The films A and B are overlapped so that non-overlapping edges 6 and 7 are formed, and the overlapping peripheral edges of the films A and B are fixed to both side edges having a structure in which a gas absorbent is housed inside and heat-sealed. heat-sealable strips 6, 7
A gas absorbent packaging body having: (2) The package according to claim 1 of the utility model registration claim, in which the gas absorbent is an oxygen absorber. (3) The package according to claim 1 of the utility model registration claim, in which the gas absorbent is a desiccant.