JPH019571Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in a packaging bag capable of gas sterilizing medical instruments and medical aids in a packaged state and maintaining the sterilized state for a long time.

Conventionally, packaging bags for sterilization have been known in which a breathable member such as a paper tube is sandwiched and glued to the sealing edge of the bag body, and sterilization gas is allowed to enter through openings at both ends of the paper tube. The disadvantage was that the entry passage for sterilizing gas was small and it took time for complete sterilization.

In order to solve the above-mentioned drawbacks, the present applicant first proposed that a gas-permeable and bacteria-impermeable double-folded paper tape be placed close to the opening edge of the bag, with the fold facing inward. We proposed a sterile packaging bag with a large sterile gas permeation passageway that is clamped on the inner surface of the bag. (Refer to Utility Model Publication No. 61-7161) In the above-mentioned prior invention, both sides of the bi-folded paper tape are adhered to the inner surface of the bag in a narrow strip in the longitudinal direction, and the inner surface of the bag at the edge of the bag opening is locally bonded. However, the adhesive strength between the paper tape and the inner surface of the bag was insufficient, and the paper tape could not be stored inside the bag. There was a risk of adhesive failure due to the expanding effect of the adhesive edges due to the movement of the article.

In this invention, both sides of a double-folded paper tape sandwiched within the bag opening edge are adhered to the inner surface of the bag using a thin cloth adhesive part, and the opposing inner surfaces of the bag on both sides adjacent to the paper tape sandwiched part are locally adhered. The above-mentioned danger is eliminated by providing sufficient adhesive strength.

That is, in the present invention, a gas-permeable and bacteria-impermeable double-folded paper tape is placed close to the opening edge of a bag made of a heat-adhesive impermeable film, with the fold facing inward of the bag. In a sterilized packaging bag that is clamped to the inner surface of the bag, a width narrower than the width of the paper tape is used to divide the paper tape in the longitudinal direction into a narrow adhesive part where both sides of the paper tape are thermally bonded to the inner surface of the bag, and a narrow adhesive part in the longitudinal direction. The object of the present invention is to provide a sterilized packaging bag characterized in that a wide adhesive part is provided which partially straddles the paper tape and also heat-bonds the opposite air-impermeable film of the bag.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view, and numeral 1 indicates an air-impermeable film with internal heat adhesive properties, such as a transparent synthetic resin film, which forms the bag body, and numeral 10 indicates the air-impermeable film 1.
2 is the folded edge, and 2 is the opening edge. 3 is a double-folded paper tape having gas permeability and bacteria impermeability that is sandwiched between the two air impermeable films 1, 1 of the bag close to and parallel to the opening edge 2; is located inside the bag and opens outward. Reference numeral 4 designates narrow adhesive portions which are narrower than the tape widths on both outer surfaces of the paper tape 3 and are thermally bonded to both inner surfaces of the bag, which are provided approximately in the central longitudinal direction of the paper tape 3; The air-impermeable films 1 of the opposing bags on both sides are bonded across the paper tape 3 at wide-width bonding parts by thermal bonding which are provided at predetermined intervals so as to be larger than the width of the paper tape 3.

Reference numeral 6 indicates a side edge adhesive portion of the bag body, and 7 indicates an open side edge for storing articles, which is sealed by heat bonding after storing the article.

Reference numeral 9 denotes a ventilation path that communicates between the inside and outside of the bag due to the gas permeability of the folded paper tape 3.

FIG. 2 is a cross-sectional view taken along the line A-A in FIG. 3 are completely folded and tightly attached, and the air-impermeable film 1 is flow-filled into the fiber structure of the paper by thermocompression bonding, and the upper and lower air-impermeable films 1, 1 are heat-sealed. The side edge adhesive portion 6 is also in approximately the same adhesive state.

FIG. 3 is a cross-sectional view taken along the line B-B in FIG. The folded side of the paper tape 3 forms a gas permeable boundary between the inside and outside of the bag, forming a ventilation path 9.
The ventilation area of the ventilation passage 9 is determined by the length and spacing in the longitudinal direction of the paper tape 3 of the wide adhesive part 5, but even if the total ventilation area is extremely large, the opposing gaps of the bag above and below the paper tape 3 Air permeable film 1,
1 is firmly thermally bonded, the strength of the bag is maintained sufficiently, and even if the weight of the contents is large, the bag can be prevented from breaking at the narrow adhesive part 4 between the impermeable film 1 and the paper tape 3.

FIG. 4 shows a sterilized packaging bag of the present invention in which an article 8 is housed and sterilized. After housing the article 8, the open side edge 7 is thermally bonded to form a sealed side edge 7a, and this packaging bag is placed in a sterilization gas pressure treatment chamber. The sterilized gas is quickly infiltrated into the packaging bag through the ventilation passage 9 to perform internal sterilization in a short time, and after the sterilization gas in the processing chamber has been discharged, the sterilized packaging bag is taken out as it is. Store it until use, or if it will be stored for a long time, seal the opening edge 2 by thermally bonding the opening edge 2 as shown in the figure.
If a, the sterile state can be maintained for a long time.

The material of the air-impermeable film of the bag, the shape of the bag, the order of the thermal bonding process, etc. are appropriately selected depending on the manufacturing conditions such as the automatic packaging process.

Since the sterile packaging bag of the present invention has the above-mentioned structure and function, it can efficiently and completely sterilize packages such as medical instruments and medical auxiliary materials, and has practical effects such as maintaining the sterile state and packaging strength. It is something that plays.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an example of the sterile packaging bag of the present invention before product packaging, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, and Fig. 3 is a cross-sectional view taken along the line B-B in Fig. 1. FIG. 4 is a plan view of the packaging bag after packaging sterilization. 1... Impermeable film, 2... Opening edge, 3...
...Paper tape, 4...Narrow width adhesive part, 5...Wide width adhesive part, 6...Side edge adhesive part, 7...Open side edge, 8...
Article, 9... Ventilation path, 10... Folded edge.

Claims (1)

[Scope of utility model registration request] Close to the opening edge 2 of the bag made of a heat-adhesive air-impermeable film 1, place a double-folded paper tape 3 that is gas permeable and bacteria-impermeable onto the inner surface of the bag with the fold facing inward. In the sterilized packaging bag, the paper tape 3 has a width narrower than the width of the paper tape 3, and both sides of the paper tape 3 are thermally bonded to the inner surface of the bag in the longitudinal direction. This sterilized packaging bag is characterized in that it has a wide adhesive part 5 which partially straddles the paper tape 3 and heat-bonds the opposite air-impermeable film 1 of the bag.