JP6761263B2 - Packaging, packaging manufacturing method, packaging bag, and use of packaging bag - Google Patents

Description

The present invention relates to a wrapping body, a method for manufacturing a wrapping body, a wrapping bag, and the use of the wrapping bag.

When transporting infectious substances, etc., the contents may be put in the bag and the bag may be sealed for transportation. From the viewpoint of versatility, a bag used for transportation is required to be a bag that can be sealed by a simple operation without using special equipment. As such a packaging bag, for example, a packaging bag in which the opening can be easily sealed by hand without using a special machine such as a heat sealer after the contents are put in through the opening. It is known (see Patent Document 1 and Patent Document 2).

Japanese Unexamined Patent Publication No. 11-59696 Japanese Unexamined Patent Publication No. 2012-6637

As a packaging bag used during transportation, for example, from the viewpoint of preventing the contents from popping out even under low pressure such as during air transportation, and to satisfy the pressure resistance stipulated as the transportation rules during transportation of infectious substances and the like. From the viewpoint of this, there is a demand for a bag having excellent pressure resistance after sealing.
In the packaging bags described in Patent Documents 1 and 2, when a high internal pressure is applied after sealing, the contents may pop out from the sealed portion, and the pressure resistance after sealing is insufficient. In particular, the packaging bag described in Patent Document 2 is prone to wrinkles when sealing the opening with a sealing material when bulky contents are put in, the sealing operation is not easy, and the pressure resistance after sealing is high. It was inadequate.

Therefore, an object of the present invention is to provide a package having excellent pressure resistance. Another object of the present invention is to provide a packaging bag which can easily seal the opening and has excellent pressure resistance after sealing.

That is, the present invention includes at least a front surface film, a back surface film, an adhesive layer provided on the front surface film, and a sealing seal provided on the back surface film.
The front surface film and the back surface film are bonded to each other at both end edges in the width direction and one end edge in the longitudinal direction to form a closed portion on one end side in the longitudinal direction, and a part of the front surface film and a part of the back surface film Is a package in which a sealing portion is formed on the other end side in the longitudinal direction by being bonded to the pressure-sensitive adhesive layer.
In the sealing portion, the front surface film, the back surface film, and the pressure-sensitive adhesive layer are formed on the pressure-sensitive adhesive layer, the front surface film, the back surface film, the back surface film, the front surface film, the front surface film, and the back surface film in the thickness direction of the package. It has at least a laminated structure I laminated in this order, and a laminated structure II in which the pressure-sensitive adhesive layer, the back surface film, the front surface film, the front surface film, and the back surface film are laminated in this order.
Provided is a package in which the laminated structure I and the laminated structure II are covered with the sealing seal.

In the package, the laminated structure I is preferably located on the other end side in the longitudinal direction with respect to the laminated structure II.

The package further includes an inner film between the front surface film and the back surface film.
The inner film is sandwiched between the front surface film and the back surface film, and is bonded at both edges in the width direction.
The laminated structure I is a laminated structure in which the adhesive layer, the front surface film, the inner film, the back surface film, the back surface film, the inner film, the front surface film, the front surface film, the inner film, and the back surface film are laminated in this order.
It is preferable that the laminated structure II is a laminated structure in which the pressure-sensitive adhesive layer, the back surface film, the inner film, the front surface film, the front surface film, the inner film, and the back surface film are laminated in this order.

It is preferable that the package has a radius of curvature of 10 mm or less at the bent portion where the front surface film and the back surface film are bent in the sealed portion.

In the package, the front surface film and the back surface film are preferably bonded to each other at one end in the longitudinal direction via the bottom surface film.

Further, in the present invention, the front surface film and the back surface film are bonded to each other at both end edges in the width direction and one end edge in the longitudinal direction to form a closed portion on one end side in the longitudinal direction and an opening on the other end side in the longitudinal direction. Form and
An adhesive layer having the same width as the width of the surface film is provided on the outside of the packaging bag of the surface film.
A sealing seal having the same width as the width of the back surface film is provided on the outside of the packaging bag of the back surface film, with at least one side as an adhesive surface.
The adhesive surface is a packaging bag in which a part is attached to the back surface film and the remaining part is attached to a paper pattern.
The packaging bag is bent along the longitudinal direction, and the end of the surface film on the longitudinal opening side is attached to a part of the pressure-sensitive adhesive layer.
The packaging bag is further bent along the longitudinal direction, and a part of the back surface film is attached to another part of the adhesive layer.
The packaging body comprises attaching the remaining portion of the pressure-sensitive adhesive surface to the surface film so that the sealing seal covers the portion of the pressure-sensitive adhesive layer and the other portion. Providing a manufacturing method for.

Further, in the present invention, the front surface film and the back surface film are bonded to each other at both end edges in the width direction and one end edge in the longitudinal direction to form a closed portion on one end side in the longitudinal direction and an opening on the other end side in the longitudinal direction. Form and
An adhesive layer having the same width as the width of the surface film is provided on the outside of the packaging bag of the surface film.
A sealing seal having the same width as the width of the back surface film is provided on the outside of the packaging bag of the back surface film, with at least one side as an adhesive surface.
In a packaging bag in which a part of the adhesive surface is attached to the back surface film and the remaining part is attached to a paper pattern.
The packaging bag is bent along the longitudinal direction, and the end of the surface film on the longitudinal opening side is attached to a part of the pressure-sensitive adhesive layer.
The packaging bag is further bent along the longitudinal direction, and a part of the back surface film is attached to another part of the adhesive layer.
The packaging bag comprises attaching the remaining portion of the pressure-sensitive adhesive surface to the surface film so that the sealing seal covers the portion and the other portion of the pressure-sensitive adhesive layer. Provide use of.

Further, in the present invention, the front surface film and the back surface film are bonded to each other at both end edges in the width direction and one end edge in the longitudinal direction to form a closed portion on one end side in the longitudinal direction and an opening on the other end side in the longitudinal direction. It is a packaging bag to form
An adhesive layer having the same width as the width of the surface film is provided on the outside of the packaging bag of the surface film.
A sealing seal having the same width as the width of the back surface film is provided on the outside of the packaging bag of the back surface film, with at least one side as an adhesive surface.
A part of the adhesive surface is attached to the back surface film, and the remaining part is attached to the paper pattern.
When the length of the pressure-sensitive adhesive layer in the longitudinal direction is a, and the length in the longitudinal direction from the end of the surface film in the longitudinal direction to the end of the pressure-sensitive adhesive layer in the longitudinal direction is b. ,
A part of the adhesive surface in the longitudinal direction is located at a distance of (2ba) / 4 in the longitudinal direction from the end in the longitudinal opening side of the back surface film, and is in the longitudinal direction from the end in the longitudinal direction. It is between the position of (6b-a) / 8 and
The longitudinal outer end of the remaining portion of the adhesive surface is from the longitudinal opening side end of the back surface film to a position at a distance of (2ba) / 4 in the longitudinal direction from the longitudinal opening side end. between,
To provide a packaging bag characterized by that.

The packaging bag preferably has a ratio of a to b ((a / b) × 100) of 15 to 50%.

The packaging bag further includes an inner film between the front surface film and the back surface film.
The length of the inner film in the longitudinal direction is shorter than the length of the front surface film and the back surface film in the longitudinal direction.
The length in the width direction of the inner film is the same as the length in the width direction of the front surface film and the back surface film.
The inner film is bonded to the longitudinal opening side edge of the front surface film or the back surface film at the longitudinal opening side edge of the packaging bag.
It is preferable that the inner film is sandwiched and bonded between the front surface film and the back surface film at both end edges in the width direction of the packaging bag.

In the packaging bag, the longitudinal length of the inner film is greater than the longitudinal length from the longitudinal opening side end of the front surface film or the back surface film to the longitudinal opening side end of the pressure-sensitive adhesive layer. Is also preferable.

In the packaging bag, it is preferable that the front surface film and the back surface film are bonded to each other at one end in the longitudinal direction via the bottom film.

The package of the present invention has excellent pressure resistance. Further, the packaging bag of the present invention can easily seal the opening and has excellent pressure resistance after sealing.

FIG. 1 is a schematic view (perspective view) of a package body showing an example of the present embodiment. FIG. 2 is a schematic view (perspective view) of a packaging bag showing an example of the present embodiment. FIG. 3 is a plan view of the packaging bag of FIG. 2 when viewed from the surface film side. FIG. 4 is a plan view of FIG. 2 when viewed from the back film side. FIG. 5 is a sectional view taken along line YY in FIG. FIG. 6 is a schematic view of the use of a packaging bag showing an example of this embodiment. FIG. 7 is a cross-sectional view taken along the line XX in FIG. FIG. 8 is a diagram showing the dimensions of the packaging bag in Examples and Comparative Examples, and the bending position when the opening is sealed.

Hereinafter, embodiments for carrying out the present invention (hereinafter, simply referred to as “the present embodiment”) will be described in detail with reference to the drawings as necessary. The following embodiment is an example for explaining the present invention, and the present invention is not limited to the following embodiment, and can be appropriately modified and implemented within the scope of the gist thereof. ..

[Packaging]
The package of the present invention includes at least a front surface film, a back surface film, an adhesive layer provided on the front surface film, and a sealing seal provided on the back surface film.
The front surface film and the back surface film are bonded to each other at both end edges in the width direction and one end edge in the longitudinal direction to form a closed portion on one end side in the longitudinal direction, and a part of the front surface film and a part of the back surface film Is a package in which a sealing portion is formed on the other end side in the longitudinal direction by being bonded to the pressure-sensitive adhesive layer.
In the sealing portion, the front surface film, the back surface film, and the pressure-sensitive adhesive layer are formed on the pressure-sensitive adhesive layer, the front surface film, the back surface film, the back surface film, the front surface film, the front surface film, and the back surface film in the thickness direction of the package. It has at least a laminated structure I laminated in this order, and a laminated structure II in which the pressure-sensitive adhesive layer, the back surface film, the front surface film, the front surface film, and the back surface film are laminated in this order.
The laminated structure I and the laminated structure II are covered with the sealing seal.
In the present specification, the other end side in the longitudinal direction means the opening side in the longitudinal direction of the packaging bag when the contents are put in the packaging bag, and the one end side in the longitudinal direction is the longitudinal direction of the packaging bag. Refers to the closed side. That is, in the packaging bag, the other end in the longitudinal direction is the same as the end on the side of the opening in the longitudinal direction, and the one end in the longitudinal direction is the same as the end on the side of the closing portion in the longitudinal direction.
Further, the edge refers to a region having a predetermined width including the entire length of the outer contour line forming the edge.
Further, "bonded" between the front surface film and the back surface film means that the front surface film and the back surface film are bonded so as to form a structure that does not allow air to pass through. For example, the front surface film and the back surface film are bonded together. The film is directly bonded, another film or the like is sandwiched between the front surface film and the back surface film, and the film is folded once or more between the front surface film and the back surface film. It includes the fact that they are pasted together with each other in between.

FIG. 1 is a schematic view (perspective view) showing an example of the package of the present embodiment.
In the packaging body 81 of FIG. 1, the contents 82 are placed in a packaging bag provided with a front surface film 2 and a back surface film 3 and whose both sides are closed on the width direction end 15 side and the longitudinal direction one end 92 side, and the contents 82 are placed in the longitudinal direction. It is a sealed package in which a sealing portion 94 is formed on the other end 91 side. The sealing portion 94 is covered with a sealing seal 61. In the sealing portion 94, a part of the front surface film 2 and a part of the back surface film 3 are bonded to the pressure-sensitive adhesive layer 5 provided on the front surface film 2, and the pressure-sensitive adhesive layer is formed in the thickness direction of the package. Laminated structure I in which the front film, back film, back film, front film, front film, and back film are laminated in this order, and laminated structure II in which the adhesive layer, back film, front film, front film, and back film are laminated in this order. (See FIGS. 6 and 7).
In the packaging body 81 of FIG. 1, at one end 92 in the longitudinal direction, the bottom film 41 folded in two at the crease 42 heats the heat seal portion 163 between the front surface film and the bottom film, and the heat between the back surface film and the bottom film. It is bonded at the seal portion 164 (see FIGS. 5 and 7) to form the closed portion 93.
In the packaging body 81 of FIG. 1, the heat-sealed portion 161 between the front surface film and the back surface film, and the front surface film and the bottom surface film, in which the front surface film 2 and the back surface film 3 are directly bonded to each other at the widthwise ends 15 on both sides, The heat-sealing portion 163 and the heat-sealing portion 164 of the back surface film and the bottom surface film are formed, and the edges on both sides in the width direction are closed portions. The package 81 of FIG. 1 has a front surface film in the heat-sealing portion 163 of the front surface film and the bottom surface film and in the heat-sealing portion 164 of the back surface film and the bottom surface film, and in the heat-sealing portion 161 of the front surface film and the back surface film. 2 and the back surface film 3 are bonded to each other, and when the package 81 is made to stand on its own, the bottom surface film 41 does not spread too much and has a structure that makes it easy to stand on its own (see FIG. 7). In this example, the shape of the heat-sealed portion 163 between the front surface film and the bottom film and the heat-sealed portion 161 between the front surface film and the back surface film in the heat-sealed portion 164 between the back surface film and the bottom film is formed into the shape of the bottom film. 41 is cut out and is not sandwiched between the front surface film and the back surface film.
The package 81 of FIG. 1 is provided with a notch 17 at a part of the widthwise end 15 from the viewpoint of facilitating opening after packaging. The notch 17 does not have to have a notched portion, and may be, for example, a notch.
First, the packaging bag constituting the packaging body of the present embodiment will be described.

(Packaging bag)
In the packaging bag used for the packaging body of the present embodiment and the packaging bag of the present embodiment, the front surface film and the back surface film are bonded to each other at both end edges in the width direction and one end edge in the longitudinal direction, and one end side in the longitudinal direction. An opening is formed on the other end side in the longitudinal direction, and an adhesive layer having the same width as the width of the front surface film is provided on the outside of the packaging bag of the front surface film. A sealing seal is provided on the outside of the bag with at least one side as an adhesive surface, and a part of the adhesive surface is attached to the back surface film and the rest is attached to the release paper. Examples include packaging bags.
FIG. 2 is a schematic view (perspective view) showing an example of a packaging bag used for the packaging body of the present embodiment and a packaging bag of the present embodiment.

The packaging bag 11 of FIG. 2 includes a front surface film 2, a back surface film 3, a bottom surface film 41, an adhesive layer 5, a sealing seal 61, and an inner film 7.
In the packaging bag 11 of FIG. 2, at the end 14 on the side of the closing portion in the longitudinal direction, the bottom film 41 folded in two at the crease 42 is a heat-sealed portion 163 between the front surface film and the bottom film, and the back surface film and the bottom film. The heat-sealed portions (see FIGS. 5 and 7) are bonded together to form the closed portion 93.
Further, the packaging bag 11 of FIG. 2 has heat-sealing portions 162 of the front film, the back film and the inner film, heat-sealing portions 161 of the front film and the back film, and the front film at the widthwise ends 15 on both sides. A heat-sealing portion 163 with the bottom film and a heat-sealing portion 164 with the back surface film and the bottom film are formed, and the end edges on both sides in the width direction also form the closing portion 93.
Further, in the packaging bag 11 of FIG. 2, the front surface film 2, the back surface film 3, and the inside of the heat-sealing portion 162 of the front surface film, the back surface film, and the inner film are formed at the end 13 on the side of the opening in the longitudinal direction and on both ends in the width direction. Although the films 7 are integrally bonded together, in the remaining portion, the inner film 7 is bonded only to the back surface film 3, and the remaining portion forms the opening 12.
Further, the packaging bag 11 of FIG. 2 is provided with an adhesive layer 5 on the outside of the packaging bag of the front surface film 2, and a sealing seal 61 is provided on the outside of the packaging bag of the back surface film 3.
Further, the packaging bag 11 of FIG. 2 is provided with a notch 17 at a part of the width direction end 15 from the viewpoint of facilitating opening of the package after sealing.
In FIG. 2, De is the longitudinal direction and Dw is the width direction.

The shapes of the front surface film 2 and the back surface film 3 constituting the packaging bag 11 are not particularly limited, and examples thereof include a rectangular shape such as a rectangle.

The length and / or width of the front surface film 2 and the back surface film 3 constituting the packaging bag 11 may be the same or different, but the length and width may be further improved from the viewpoint of further improving the airtightness. Is preferably the same.
The lengths of the front surface film 2 and the back surface film 3 (“K” in FIG. 8) are preferably, for example, 100 to 700 mm, more preferably 150 to 650 mm.
The width of the front surface film 2 and the back surface film 3 (“A” in FIG. 8) is preferably, for example, 40 to 400 mm, and more preferably 50 to 350 mm.

As a method of bonding the front surface film 2 and the back surface film 3, heat sealing is preferable from the viewpoint of obtaining more excellent pressure resistance. The width of the portion to be bonded is preferably the same width at both end edges in the width direction and one end edge in the longitudinal direction from the viewpoint of efficiency of the bonding work, and is 5 to 30 mm from the viewpoint of further excellent sealing. Is preferable.

FIG. 3 is a plan view of the packaging bag of FIG. 2 when viewed from the surface film side.
In the packaging bag 11 of FIG. 3, an adhesive layer 5 having the same width as the width of the surface film 2 is provided on the surface film 2. A paper pattern may be provided on the surface of the pressure-sensitive adhesive layer 5 on the side not in contact with the surface film.

Examples of the pressure-sensitive adhesive layer 5 include a pressure-sensitive adhesive layer made of a pressure-sensitive adhesive such as an acrylic pressure-sensitive adhesive, a rubber-based pressure-sensitive adhesive, a silicone-based pressure-sensitive adhesive, and a urethane-based pressure-sensitive adhesive. As the pressure-sensitive adhesive layer 5, for example, a double-sided pressure-sensitive adhesive sheet composed of only the pressure-sensitive adhesive layer, a double-sided pressure-sensitive adhesive sheet having pressure-sensitive adhesive layers on both sides of the base material, or the like may be used.

The length from the longitudinal opening side end of the surface film 2 to the longitudinal opening side end of the pressure-sensitive adhesive layer 5 (“I” in FIG. 8) is, for example, 30 from the viewpoint of easily sealing the packaging bag. It is preferably about 200 mm, more preferably 40 to 150 mm.

The length a (“J—I” in FIG. 8) of the pressure-sensitive adhesive layer 5 in the longitudinal direction is preferably, for example, 15 to 80 mm from the viewpoint of further excellent airtightness and easier sticking. More preferably, it is 20 to 70 mm.
The longitudinal length of the pressure-sensitive adhesive layer 5 is a, and the longitudinal length from the longitudinal opening side end of the surface film 2 to the longitudinal opening side end of the pressure-sensitive adhesive layer 5 is b (in FIG. 8). When “J”), the ratio of a to b (a / b × 100) (“(J—I) / J × 100” in FIG. 8) is more excellent in airtightness and more convenient. From the viewpoint of easy sticking, for example, it is preferably 15 to 80%, more preferably 15 to 70%, further preferably 15 to 50%, and particularly preferably 20 to 50%. preferable.

The ratio of the length from the longitudinal opening side end of the surface film 2 to the longitudinal opening side end of the pressure-sensitive adhesive layer 5 with respect to the length in the width direction of the surface film 2 (“I / A × 100” in FIG. 8). ) Is preferably 30 to 70% from the viewpoint of further excellent pressure resistance after sealing.

The ratio of the length from the longitudinal opening side end of the surface film 2 to the longitudinal opening side end of the pressure-sensitive adhesive layer 5 with respect to the length in the width direction of the surface film 2 (“J / A × 100” in FIG. 8). ) Is preferably 40 to 90% from the viewpoint of further excellent pressure resistance after sealing. The ratio of the length from the longitudinal opening side end of the surface film 2 to the longitudinal opening side end of the pressure-sensitive adhesive layer 5 with respect to the width direction length of the surface film 2 is the width direction of the surface film 2. The value is larger than the ratio of the length from the longitudinal opening side end of the surface film 2 to the longitudinal opening side end of the pressure-sensitive adhesive layer 5 with respect to the length.

The ratio of the length of the pressure-sensitive adhesive layer 5 in the longitudinal direction to the length in the width direction of the surface film 2 (“(JI) / A × 100” in FIG. 8) is a viewpoint in which the pressure resistance after sealing is further excellent. Therefore, it is preferably 6 to 25%.

In the packaging bag 11 of FIG. 3, the closing portion 93 of the closing portion side end 14 in the longitudinal direction is formed of the front surface film 2, the back surface film 3, and the bottom surface film 41.

In the packaging bag of the present embodiment, the contents can be made to stand on its own after the contents are put in and sealed, and the contents 82 are difficult to move in the packaging 81. After the 82 is put in and sealed, the closed portion of the side end 14 of the closed portion in the longitudinal direction may have a structure capable of becoming independent. Examples of the structure capable of self-supporting include a structure in which a film having one or more creases is sandwiched between the front surface film 2 and the back surface film 3 at the closing portion 93 of the closing portion side end 14 in the longitudinal direction. Be done.

The packaging bag 11 of FIG. 3 is laminated with the front surface film 2, the bottom film 41 folded in two at the crease 42, and the back surface film 3 in this order at the closing portion 93 of the closing portion side end 14 in the longitudinal direction. The bottom film 41 is heat-sealed by the heat-sealing portion 163 between the front surface film and the bottom film, and the back surface film 3 and the bottom film 41 are heat-sealed by the heat-sealing portion 164 between the back surface film and the bottom film ( (See FIG. 5).

The shape of the bottom film 41 may be, for example, a rectangular shape such as a rectangle. The bottom film 41 may have one crease or a plurality of creases.
The width of the bottom film 41 is preferably the same as that of the front surface film 2 and the back surface film 3, for example.
As a method of bonding the bottom film 41 and the front surface film 2 and / or the back surface film 3, heat sealing is preferable from the viewpoint of obtaining more excellent pressure resistance. From the viewpoint of airtightness, the bottom film 41 is laminated so that the widthwise end and the longitudinal closure side end of the film to be bonded overlap each other at the widthwise end 15 and the longitudinal closure side end 14 on both sides. It is preferable to have.

The shape of the heat-sealed portion 163 between the surface film and the bottom film as seen from the surface film side is such that the crease 42 of the bottom film 41 is widened after the contents 82 are put in and sealed, and the crease 42 is widened and then the longitudinal closing portion is closed. The shape of the side (the shape when the one end 92 side in the longitudinal direction is viewed from the other end 91 side in the longitudinal direction) is wide in the central portion in the width direction and narrow in the end side in the width direction, so that the content 82 is inside the package 81. From the viewpoint of making it difficult to move, it is preferable that the length of the heat-sealed portion from the end in the longitudinal direction to the end in the longitudinal direction is longer on the end side in the width direction than on the center side in the width direction. Specifically, as shown in FIG. 3, the heat seal width is short at the central portion in the width direction and the heat seal width is long at the end side in the width direction, and more specifically, the heat seal is formed in an arc shape. Is preferable.
The shape of the heat-sealed portion 164 between the back surface film and the bottom surface film when viewed from the back surface film side is preferably the same shape.
Further, from the viewpoint that after the content 82 is put in, the content 82 does not spread too much at the crease 42 of the bottom film 41 but spreads appropriately, and the content 82 becomes more difficult to move in the package 81, the surface film and the bottom film are combined. A heat-sealing portion 161 of the front surface film and the back surface film is provided on a part of the widthwise end 15 of the packaging bag 11 in the heat-sealing portion 163 and the heat-sealing portion 164 of the back film and the bottom film. It is preferable to bond 2 and the back surface film 3. Specifically, the bottom surface film 41 may be cut off at the portion of the heat seal portion 161 between the front surface film and the back surface film, and the front surface film 2 and the back surface film 3 may be bonded to each other, or the front surface may be bonded via the bottom surface film 41. The film 2 and the back surface film 3 may be bonded together. The shape of the heat seal portion 163 between the front surface film and the bottom film and the heat seal portion 161 between the front surface film and the back surface film in the heat seal portion 164 between the back surface film and the bottom film (shape when viewed from the front surface film 2 side). ) For example, a semicircular shape or the like (FIG. 3).

FIG. 4 is a plan view of the packaging bag of FIG. 2 when viewed from the back surface film side.
The packaging bag 11 of FIG. 4 is provided with a sealing seal 61 on the back surface film 3 with at least one side as an adhesive surface 62. A part of the adhesive surface 62 of the sealing sticker 61 is attached to the back surface film 3, and the remaining portion is attached to the paper pattern 63.
The adhesive surface 62 of the sealing seal 61 has, in the longitudinal direction, the above-mentioned part where the adhesive surface 62 is exposed and the above-mentioned remaining part to which the release paper 63 is attached. In the sealing seal 61, the adhesive surface 62 is exposed, part of which is the longitudinal closing portion side of the back surface film 3, and the remaining portion to which the release paper 63 is attached is the longitudinal opening of the back surface film 3. It is attached to the back surface film 3 so as to be on the side of the portion (see FIG. 5).

The sealing seal 61 may be a double-sided adhesive seal having both sides as adhesive surfaces, or a single-sided adhesive seal having one side as an adhesive surface. In the case of a double-sided adhesive seal, a paper pattern 63 is provided on the remaining portion of the adhesive surface on one surface, and the adhesive surface on the other surface is separated from the entire surface from the viewpoint of ease of sealing the opening. It is preferable that a paper pattern is provided.
Examples of the sealing seal 61 include known adhesive seals. For example, the adhesive surface 62 includes an adhesive layer surface made of an adhesive such as an acrylic adhesive, a rubber adhesive, a silicone adhesive, and a urethane adhesive, and the release paper 63 includes a base material. Examples thereof include a mold release paper provided with a layer made of a silicone-based mold release agent, a fluorine-based mold release agent, or the like.

The length of the sealing seal 61 in the longitudinal direction (“ML” in FIG. 8) is, for example, 55 to 150 mm from the viewpoint of further excellent sealing and making it easier to seal the opening. Is preferable, and more preferably 60 to 140 mm.
The length of the sealing seal 61 in the width direction may be the same as the length of the back surface film 3 in the width direction, or may be shorter than the length of the back surface film 3 in the width direction. From the viewpoint of making it easy to attach the sealing seal, the length of the sealing seal 61 in the width direction is 80 to 100% with respect to the length (100%) of the back surface film 3 in the width direction. preferable.

The ratio of the length from the longitudinal opening side end of the pressure-sensitive adhesive layer 5 to the longitudinal opening side end of the sealing seal 61 with respect to the length in the width direction of the back surface film 3 (“(MI)) in FIG. / A × 100 ”) is preferably 0 to 45% from the viewpoint of further excellent pressure resistance after sealing.

The length from the longitudinal opening side end of the release paper 63 bonded on the adhesive surface 62 of the sealing seal 61 to the longitudinal opening side end of the adhesive layer 5 with respect to the length in the width direction of the back surface film 3. The ratio of the dimensions (“(IP) / A × 100” in FIG. 8) is preferably 1 to 30% from the viewpoint of efficiency of the work of attaching the adhesive surface of the sealing seal.

When the length of the pressure-sensitive adhesive layer 5 in the longitudinal direction is a, and the length in the longitudinal direction from the end of the surface film 2 in the longitudinal direction to the end of the pressure-sensitive adhesive layer 5 in the longitudinal direction is b. The outer end in the longitudinal direction (the end on the side of the opening in the longitudinal direction of the sealing seal 61) of the remaining portion (the portion to which the release paper 63 is attached) of the adhesive surface 62 of the sealing seal 61 is formed by the sealing seal. From the viewpoint of ease of sealing, between the end of the back surface film 3 in the longitudinal direction and the end of the back surface film 3 in the longitudinal direction at a distance of (2ba) / 4 It is preferable to have. That is, it is preferably between the end of the back surface film 3 on the side of the opening in the longitudinal direction and the first bending portion (see FIG. 6).

The inner end in the longitudinal direction (the portion where the back surface film 3 and the adhesive surface 62 are bonded and the portion where the release paper 63 is not bonded) of the adhesive surface 62 of the sealing seal 61 (the back surface film 3 and the adhesive surface). The longitudinal opening side end of the portion to which the 62 is bonded) is longitudinally (2ba) from the longitudinal opening side end of the back surface film 3 from the viewpoint of ease of sealing by the sealing seal. It is preferably between the position of the distance of / 4 and the position of the back surface film 3 from the side end of the opening in the longitudinal direction to the position of the distance of (6ba) / 8 in the longitudinal direction. That is, it is preferably between the first bent portion (see FIG. 6) and the second bent portion (see FIG. 6).

The length of the remaining portion of the sealing seal 61 attached to the release paper 63 in the longitudinal direction (“PL” in FIG. 8) is the peeling of the release paper when the sealing seal is used. From the viewpoint of ease, it is preferably 25 to 70 mm.

The length of the part of the sealing seal 61 in the longitudinal direction (“MP” in FIG. 8) attached to the back surface film 3 is from the viewpoint of further strengthening the sealing by the sealing seal. It is preferably 25 to 70 mm.

FIG. 5 is a cross-sectional view taken along the line XX in FIG.

The packaging bag used for the packaging body of the present embodiment and the packaging bag of the present embodiment may further include an inner film 7 between the front surface film 2 and the back surface film 3.
The length of the inner film 7 in the longitudinal direction is shorter than the length in the longitudinal direction of the front surface film 2 and the back surface film 3, and the length in the width direction is the length in the width direction of the front surface film 2 and the back surface film 3. It is the same, and at the longitudinal opening side edge of the packaging bag 11, it is bonded to the longitudinal opening side edge of the front surface film 2 or the back surface film 3, and the inner film 7 is attached to both widthwise edges of the packaging bag 11. , It is preferable that the front surface film 2 and the back surface film 3 are sandwiched and bonded to each other.
In the packaging bag 11 of FIGS. 2 to 5, the inner film 7 is bonded to the longitudinal opening side edge of the back surface film 3, and is not bonded to the longitudinal opening edge of the front film 3. Further, in the inner film 7, at the widthwise ends 15 on both sides of the packaging bag 11, the widthwise both ends of the inner film 7 are the sides of the front side film 2 in the width direction and the sides of the back surface film 3 in the width direction. It is sandwiched between them and pasted together.
A heat seal is preferable as a method for laminating the inner film 7. From the viewpoint of efficiency of the bonding work, the width of the portion to be bonded is preferably the same width at both end edges in the width direction and one end edge in the longitudinal direction, and is preferably 5 to 30 mm.

The inner film 7 has more excellent pressure resistance after sealing, and the length of the inner film 7 in the longitudinal direction is set to the front surface film 2 or the back surface from the viewpoint that the contents are less likely to scatter when the sealed body is broken. It is preferably longer than the length from the longitudinal opening side end of the film 3 to the longitudinal opening side end of the pressure-sensitive adhesive layer 5 (in FIG. 8, "I <H" is preferable).

The ratio of the length from the longitudinal opening side end of the pressure-sensitive adhesive layer 5 to the longitudinal opening side end of the inner film 7 with respect to the length in the width direction of the back surface film 3 (in FIG. 8, "(HI). ) / A × 100 ”) is preferably 1 to 30%, more preferably 1 to 20%, from the viewpoint of further excellent pressure resistance after sealing.

The front surface film 2, the back surface film 3, the bottom surface film 41, and the inner film 7 are preferably bonded at their edge edges, and preferably have heat-sealing properties for practical reasons.
Each film of the front surface film 2, the back surface film 3, the bottom surface film 41, and the inner film 7 includes a heat seal layer, and if necessary, a base material layer, a printing layer between the heat seal layer and the base material layer, and the like. Other layers of, may be included. Each film may be a single layer composed of a heat-sealing layer, or may be a plurality of layers including a heat-sealing layer, a base material layer, and other layers. Each film can be used so that the base material layer is located on the outside and the heat seal layer is located on the inside when processed into a bag shape. The inner film 7 may be provided with heat seal layers on both surfaces.

Examples of the material of the heat seal layer include low density polyethylene (LDPE), linear low density polyethylene (LLDPE), ethylene / α-olefin copolymer, ethylene / vinyl acetate copolymer, and ethylene / acrylic acid common weight. Examples thereof include coalescence, ethylene / acrylic ester copolymer, polypropylene, and propylene copolymer. From the viewpoint of odor, low density polyethylene (LDPE), linear low density polyethylene (LLDPE), polypropylene, and propylene are used together. Polymers are preferred.
Examples of the material of the base material layer and the intermediate layer include a stretched film made of polypropylene; a biaxially stretched film of a polyamide such as nylon 6, nylon 66, and MXD6 (polymethoxylylen adipamide); polyethylene terephthalate, polybutylene terephthalate, and the like. A biaxially stretched film made of a polyester resin or the like is preferably used. If necessary, as a base material layer and an intermediate layer, films such as ethylene-vinyl acetate copolymer saponified product (EVOH), polyvinylidene chloride (PVDC), and polyacrylonitrile (PAN); aluminum foil; silica, alumina. , A gas barrier film such as a biaxially stretched nylon film provided with a vapor-deposited layer such as aluminum or a PVDC coating layer, a biaxially stretched polyethylene terephthalate film, or a biaxially stretched polypropylene film may also be used. Among these, as the base material layer, a biaxially stretched film of a polyester resin such as polyethylene terephthalate or polybutylene terephthalate is preferable from the viewpoint of further excellent pressure resistance after sealing. Among these, as the intermediate layer, from the viewpoint of preventing the occurrence of pinholes due to bending, a biaxially stretched film of polyamide such as nylon 6, nylon 66, MXD6 (polymexylylene adipamide), and a coating layer of PVDC are used. The provided biaxially stretched nylon film is preferable.

A known dry lamination method or extrusion lamination method (sandwich lamination method) can be used for laminating the heat seal layer, the base material layer, and the intermediate layer. In the case of the dry lamination method, the type of adhesive may be selected in consideration of the type of contents, packaging form, etc., and is not particularly limited, but for example, a one-component or two-component polyurethane adhesive is preferable. , A two-component polyester polyurethane adhesive is more preferable. In the case of the extrusion lamination method, the resin used for extrusion is not particularly limited, and for example, low density polyethylene (LDPE), linear low density polyethylene (LLDPE), ethylene / α-olefin copolymer, and ethylene / vinyl acetate are used. Examples include polymers, ethylene / acrylic acid copolymers, ethylene / acrylic acid ester copolymers, polypropylene, propylene copolymers, etc. From the viewpoint of odor, low density polyethylene (LDPE), linear low density polyethylene, etc. (LLDPE), polypropylene, propylene copolymer is preferred.

The thickness of the front surface film 2, the back surface film 3, and the bottom surface film 41 constituting the packaging bag 11 may be 80 μm or more, preferably 90 μm or more, 230 μm or less, and preferably 200 μm or less.
The thickness of the inner film 7 constituting the packaging bag 11 may be 40 μm or more, preferably 50 μm or more, 150 μm or less, and preferably 140 μm or less.

(Manufacturing method of packaging)
Next, a method for manufacturing the package of the present embodiment and the use of the packaging bag of the present embodiment will be described.
In the method for manufacturing a package of the present embodiment, the front surface film and the back surface film are bonded to each other at both end edges in the width direction and one end edge in the longitudinal direction to form a closed portion on one end side in the longitudinal direction, and the other end in the longitudinal direction. Form an opening on the side,
An adhesive layer having the same width as the width of the surface film is provided on the outside of the packaging bag of the surface film.
A sealing seal with at least one side as an adhesive side is provided on the outside of the packaging bag of the back film.
The adhesive surface is a packaging bag in which a part is attached to the back surface film and the remaining part is attached to a paper pattern.
The packaging bag is bent along the longitudinal direction, and the end of the surface film on the longitudinal opening side is attached to a part of the pressure-sensitive adhesive layer.
The packaging bag is further bent along the longitudinal direction, and a part of the back surface film is attached to another part of the adhesive layer.
It is preferred that the sealing seal comprises affixing the remaining portion of the pressure-sensitive adhesive surface to the surface film so that the portion of the pressure-sensitive adhesive layer and the other portion are covered.

In the use of the packaging bag of the present embodiment, the front surface film and the back surface film are bonded together at both end edges in the width direction and one end edge in the longitudinal direction to form a closed portion on one end side in the longitudinal direction, and the other end side in the longitudinal direction. Form an opening in
An adhesive layer having the same width as the width of the surface film is provided on the outside of the packaging bag of the surface film.
A sealing seal with at least one side as an adhesive side is provided on the outside of the packaging bag of the back film.
In a packaging bag in which a part of the adhesive surface is attached to the back surface film and the remaining part is attached to a paper pattern.
The packaging bag is bent along the longitudinal direction, and the end of the surface film on the longitudinal opening side is attached to a part of the pressure-sensitive adhesive layer.
The packaging bag is further bent along the longitudinal direction, and a part of the back surface film is attached to another part of the adhesive layer.
It is preferred that the sealing seal comprises affixing the remaining portion of the pressure-sensitive adhesive surface to the surface film so that the portion of the pressure-sensitive adhesive layer and the other portion are covered.

FIG. 6 is a schematic view of the method for manufacturing the package of the present embodiment or the use of the packaging bag of the present embodiment. FIG. 6 shows an enlarged cross section of the packaging bag 11 in the vicinity of the longitudinal opening.
FIG. 6A is a packaging bag before the opening is sealed. An adhesive layer 5 is provided on the front surface film 2, a sealing seal 61 is provided on the back surface film 3, and an inner film 7 is provided between the front surface film 2 and the back surface film 3.

FIG. 6B is a schematic view showing the first bending in which the packaging bag 11 is bent along the longitudinal direction and the end of the surface film 2 in the longitudinal direction is attached to a part of the adhesive layer 5. is there. As a method of bending the packaging bag in the first bending, the packaging bag may be bent at the first bending portion, or the packaging bag may be rolled without folding at the bending portion. In FIG. 6B, the packaging bag is bent at the first bending portion 95.

At the time of the first bending, the front surface film 2 is attached to a part of the adhesive layer 5 so that the back surface film 3 can be attached to the pressure-sensitive adhesive layer 5 at the time of the second bending described later.
As a part of bonding the front surface film 2 and the pressure-sensitive adhesive layer 5 at the time of the first bending, the back surface film can be easily bonded to the pressure-sensitive adhesive layer at the time of the second bending, and the pressure resistance after sealing is further improved. It is preferably 30 to 60% with respect to the longitudinal length (100%) of the agent layer 5.

The pressure-sensitive adhesive layer 5 may be separated into two or more in the longitudinal direction. For example, in the first bending, a part of the pressure-sensitive adhesive layer to which the front surface film 2 is bonded and another portion of the pressure-sensitive adhesive layer to which the back surface film 3 is bonded in the second bending described later are separated in the longitudinal direction. May be provided.

FIG. 6C is a schematic view showing the second bending in which the packaging bag 11 is further bent along the longitudinal direction and a part of the back surface film 3 is attached to the remaining part of the adhesive layer 5. is there. As a method of bending the packaging bag in the second bending, the packaging bag may be bent at the second bending portion, or the packaging bag may be rolled without folding at the bending portion. In FIG. 6C, the packaging bag is bent at the second bent portion 96.

After the first bending and the second bending, the sealing portion 94 having the second bending portion 96 on the other end 91 side in the longitudinal direction and the first bending portion 95 on the one end 92 side in the longitudinal direction is formed. Can be done.
In the sealed portion 94, the first bent portion 95 may or may not be on the pressure-sensitive adhesive layer 5. Above all, from the viewpoint of further excellent pressure resistance, it is preferable that the first bent portion 95 is on the pressure-sensitive adhesive layer 5.

After the first bending and the second bending, the front surface film 2, the back surface film 3, and the pressure-sensitive adhesive layer 5 are formed on the sealing portion 94 in the thickness direction of the package 81. A laminated structure I97 in which the back film, the back film, the front film, the front film, and the back film are laminated in this order, and a laminated structure II98 in which the adhesive layer, the back film, the front film, the front film, and the back film are laminated in this order are formed. To.
Further, in the laminated structure I97, the front surface film 2, the back surface film 3, the adhesive layer 5, and the inner film 7 are the adhesive layer, the front surface film, the inner film, the back surface film, the back surface film, the inner film, the front surface film, and the front surface film. , Inner film, and back film, and in the laminated structure II98, the pressure-sensitive adhesive layer, back film, inner film, front film, front film, inner film, and back film are laminated in this order.
In the package of the present embodiment, the laminated structure I is preferably located on the other end 91 side in the longitudinal direction with respect to the laminated structure II.

FIG. 6D is a diagram in which the paper pattern 63 is peeled off from the sealing sticker 61.
In the method for manufacturing the packaging body of the present embodiment or the use of the packaging bag of the present embodiment, the release paper 63 attached on the sealing sticker 61 from the viewpoint of further simplifying the sealing operation by the sealing sticker. It is preferable that the end portion on the side of the second bent portion 96 is between the first bent portion 95 and the second bent portion 96.

The length of the release paper 63 attached on the sealing sticker 61 makes it difficult for the adhesive surface 62 of the sealing seal to adhere to the surface film 2 when the release paper is peeled off, and the operation of peeling off the release paper is easy. From the viewpoint, it is preferable that the length is not too long, and the longitudinal inner end of the part of the adhesive surface and the longitudinal outer end of the remaining portion of the adhesive surface in the packaging bag are in the above range. preferable.

FIG. 6E is a diagram in which the sealing seal 61 is attached to the surface film 2 so as to cover the laminated structure I97 and the laminated structure II98.
In FIG. 6E, the sealing seal 61 is a part of the pressure-sensitive adhesive layer 5 bonded to the front surface film 2 in the first bending, and the pressure-sensitive adhesive layer 5 bonded to the back surface film in the second bending. It is attached to the surface film 2 so as to cover the other portion.
The sealing seal 61 preferably covers the first bent portion 95 and the second bent portion 96.

FIG. 7 is a sectional view taken along line XX of the package of FIG. 1 showing an example of the package of the present embodiment.
In the package of FIG. 7, the front surface film 2, the bottom surface film 41, and the back surface film 3 are heat-sealed between the front surface film and the bottom surface film 163, and the back surface film and the bottom surface film are heat-sealed at the closed portion at one end in the longitudinal direction. It is pasted together in part 164.
The package 81 containing the contents 82 has a structure in which the folds 42 of the bottom film 41 are widened so that the package 81 can stand on its own.

The package 81 of FIG. 7 has a laminated structure I97 and a laminated structure II98 in the sealed portion 94, and the laminated structure I97 is located on the other end side in the longitudinal direction with respect to the laminated structure II98.

The package of FIG. 7 contains the contents 82. The contents of the package of the present embodiment include, for example, blood, cells, biological experimental materials, clinical specimens, clinical specimens, infectious substances such as urine and hair, bacteria, insecticidal bactericides, back disinfectants, herbicides and the like. Examples include primary containers such as plastic containers and glass containers containing urinary substances.

In the package of the present embodiment, the radius of curvature of the bent portion (the first bent portion 95 and the second bent portion 96 in FIG. 6) in which the front surface film 2 and the back surface film 3 are bent is 10 mm or less. It is preferably 8 mm or less, and more preferably 8 mm or less.
In the present specification, the bending radius can be measured, for example, by observing the cross section of the package with a microscope.

The package of the present embodiment preferably has a pressure resistance of 95 kPa or more as measured according to the UN standard (UN3373 P650).

The package of the present embodiment preferably has a pressure resistance at a temperature of 55 ° C. of 95 kPa or more, and more preferably 100 kPa or more.
The pressure resistance strength at a temperature of 55 ° C. can be measured by the method described in Examples described later.

The package of the present embodiment preferably has a pressure resistance at a temperature of −40 ° C. of 95 kPa or more, and more preferably 100 kPa or more.
The withstand voltage strength at a temperature of −40 ° C. can be measured by the method described in Examples described later.

It is preferable that the package of the present embodiment does not leak the liquid inside when the internal pressure is 100 kPa at each temperature of 55 ° C. or −40 ° C.
Leakage of the liquid at each temperature of 55 ° C. or −40 ° C. can be measured by the method described in Examples described later.

Since the package of the present embodiment has a specific laminated structure in the sealed portion and has two bent portions, it is excellent in pressure resistance. In particular, when the internal pressure of the package increases, the bent portion is closed at the first bent portion 85 and the second bent portion 86, the radius of curvature of the bent portion becomes smaller, and the pressure leaks from the opening even when the pressure is increased. It becomes difficult.
Above all, when the inner film 6 is provided, the bent portion is more easily closed, the gap in the bent portion is reduced, the airtightness of the sealed portion is further improved, and the pressure resistance is further improved. Further, if the inner film 6 is provided, the contents are less likely to pop out when the sealing seal of the package is damaged due to high pressure, and the safety is also excellent.
Further, if the closed portion on one end side in the longitudinal direction is formed by sandwiching the film folded once or more (for example, the bottom film 42 formed by the crease 42), the package is lengthened after the contents are sealed. It can stand on its own with the closed part on one end side facing down. Therefore, during transportation or the like, the contents are less likely to move inside the package, and the contents are less likely to leak.

In the method for manufacturing the package of the present embodiment and the use of the package of the present embodiment, the opening can be easily sealed without using a machine. In addition, wrinkles are less likely to occur when covering the sealed portion with the sealing seal.
Above all, the longitudinal inner end of the adhesive surface of the sealing sheet is located at a distance of (2ba) / 4 in the longitudinal direction from the longitudinal opening side end of the back surface film. It is between the side end and the position at a distance of (6ba) / 8 in the longitudinal direction, and the longitudinal outer end of the remaining portion of the adhesive surface is from the longitudinal opening side end of the back surface film. If it is between the end on the side of the longitudinal opening and the position at a distance of (2ba) / 4 in the longitudinal direction, it becomes easier to maintain a constant distance between the adhesive surface and the surface film after the second bending, and the film is sealed. The sealing operation by the seal can be easily performed, and the sealing portion is less likely to be wrinkled. Therefore, the pressure resistance is further excellent.

In the packaging bag used for the packaging body of the present embodiment and the packaging bag of the present embodiment, the front surface film and the back surface film are bonded to each other at one end edge in the longitudinal direction without using the bottom film, and the one end side in the longitudinal direction is attached. It may be a packaging bag that forms a closed portion.

The package of the present embodiment can be suitably used as a secondary container for transporting infectious substances.

Hereinafter, the present invention will be described in more detail based on Examples, but the present invention is not limited to these Examples.

(Example 1)
As the front film, back film, and bottom film, dry lamination is performed using polyethylene terephthalate as the base film, a biaxially stretched film of polyamide as the intermediate layer, and linear low density polyethylene (LLDPE) as the heat seal layer. A laminated film having a thickness of 122 μm laminated by the method was used. The front surface film and the back surface film were rectangular films having a width of 120 mm and a length of 220 mm. Further, as the bottom film, a rectangular film having a width of 120 mm and a length of 62 mm was used by folding it in two with a crease at a half position in the length direction. Further, as the inner film, a linear low-density polyethylene (LLDPE) single-layer film having a width of 120 mm, a length of 60 mm, and a thickness of 60 μm was used.
The width direction end edges are overlapped in the order of the front film, the inner film, and the back surface film so that the width direction ends and the other end edges in the longitudinal direction overlap each other, and the portion 10 mm from each end edge in the width direction is heated. I sealed it.
For the other edge in the longitudinal direction, the back surface film and the inner film were heat-sealed at a portion 10 mm from the edge.
The one end edge in the longitudinal direction is heat-sealed by stacking the front surface film, the bottom surface film, and the back surface film in this order so that both ends in the width direction and one end edge in the longitudinal direction overlap each other and the heat seal layers face each other. did. As shown in FIG. 2, the front surface film and the back surface film are heat-sealed at a part of both ends in the width direction in the heat-sealed portion between the front surface film and the bottom surface film, and the remaining portion at both ends in the width direction and one edge in the longitudinal direction. , The front surface film and the bottom surface film, and the back surface film and the bottom surface film were heat-sealed. In the heat-sealing portion between the front surface film and the back surface film at both ends in the width direction in the heat-sealing portion between the front surface film and the bottom surface film, the bottom surface film is cut into the shape of the heat sealing portion between the front surface film and the back surface film. Therefore, the front surface film and the back surface film are directly bonded to each other. The shape of the heat-sealed portion between the bottom film and the front surface film and the shape of the heat-sealed portion between the bottom film and the back surface film as viewed from the front surface film side are arcuate as shown in FIGS. 3 and 4). Both ends in the width direction were heat-sealed so as to be 10 mm or more from the edge. Then, a closed portion was formed on both end edges in the width direction and one end edge in the longitudinal direction, and an opening was formed on the other end side in the longitudinal direction.
Next, an adhesive layer having a width of 120 mm and a length of 25 mm was provided on the outside of the packaging bag of the surface film between the position of 50 mm and the position of 75 mm from the end of the longitudinal opening. An acrylic pressure-sensitive adhesive layer was used as the pressure-sensitive adhesive layer.
Next, a release paper having a width of 116 mm and a length of 30 mm is placed on a portion from one end in the length direction of the adhesive surface of the sealing seal having a width of 116 mm and a length of 65 mm to a position from one end in the length direction to 30 mm. They were pasted together to prepare a sealing seal. An acrylic pressure-sensitive adhesive was used as the pressure-sensitive adhesive for forming the pressure-sensitive adhesive surface. Then, from a position 10 mm from the longitudinal opening side end of the back surface film to a position 75 mm from the longitudinal opening side end of the back surface film, the portion where the paper pattern is attached is on the opening side. The back film and the sealing seal were bonded together. The paper pattern was attached by providing a blank portion 2 mm from both width ends of the back surface film. And I got a packaging bag.

The packaging bag was bent along the longitudinal direction at a position 30 mm from the longitudinal opening side end of the obtained packaging bag, and the longitudinal opening side end of the surface film and the adhesive layer were bonded together (first time). Bending). The length of the portion in which the surface film and the pressure-sensitive adhesive layer were bonded was 10 mm in the longitudinal direction.
Next, the packaging bag was further bent along the longitudinal direction at a position 50 mm from the longitudinal opening side end of the packaging bag, and the back surface film was attached to the pressure-sensitive adhesive layer (second bending). Then, from the longitudinal opening side end of the pressure-sensitive adhesive layer to the position 10 mm from the longitudinal opening side end, the pressure-sensitive adhesive layer, the front surface film, the inner film, the back surface film, the back surface film, the inner film, and the front surface film. , The surface film, the inner film, and the back surface film are laminated in this order from a position 10 mm from the longitudinal opening side end of the pressure-sensitive adhesive layer to a position 20 mm from the longitudinal opening side end of the pressure-sensitive adhesive layer. A sealed portion having a laminated structure II in which the pressure-sensitive adhesive layer, the back surface film, the inner film, the front surface film, the front surface film, the inner film, and the back surface film are laminated in this order was formed between the two.
Then, the release paper of the sealing seal was peeled off, the adhesive surface and the surface film were bonded so as to cover the laminated structure I and the laminated structure II, and the packaging bag was sealed. Then, a package was obtained.
Table 1 shows the dimensions of the packaging body and the bending position when the opening of the packaging bag is sealed (see FIG. 8).
In Table 1 and FIG. 8, “A” is the length in the width direction of the packaging bag. “B” is the length from the end of the opening in the longitudinal direction of the packaging bag to the position where it bends with the second bending. "C" is the length from the position of bending with the second bending to the position of bending at the time of the first bending (first bending portion). "D" is the length from the position of bending at the time of the first bending (the first bending portion) to the position of bending at the time of the second bending (the second bending portion). "E" is the length from the position of bending at the time of the second bending (the second bending portion) to the end on the side of the closing portion in the longitudinal direction of the inner film. "F" is the length from the end of the opening in the longitudinal direction of the packaging bag to the position where the packaging bag is bent at the first bending (the first bending portion). "G" is the length from the end of the opening in the longitudinal direction of the packaging bag to the position of bending at the time of the second bending (the second bending portion). “H” is the length from the end of the longitudinal opening of the packaging bag to the end of the inner film on the side of the longitudinal opening. “I” is the length from the end of the longitudinal opening of the packaging bag to the end of the adhesive layer on the side of the longitudinal opening. “J” is the length from the end of the longitudinal opening of the packaging bag to the end of the adhesive layer on the side of the longitudinal opening. "K" is the length of the packaging bag in the longitudinal direction. “L” is the length from the end of the longitudinal opening of the packaging bag to the end of the sealing seal in the longitudinal direction. "M" is the length from the end of the longitudinal opening of the packaging bag to the end of the sealing seal in the longitudinal direction. "N" is the length in the width direction of the sealing seal. "O" is the length from the widthwise end of the packaging bag to the widthwise end of the sealing seal. “P” is the length from the end of the opening in the longitudinal direction of the packaging bag to the end of the opening in the longitudinal direction of the release paper bonded on the adhesive surface of the sealing seal.

(Examples 2, 3, 5-8, Comparative Examples 1 to 3)
A package was obtained in the same manner as in Example 1 except that the dimensions of the front surface film, the back surface film, the inner film, the adhesive layer, the sealing seal, and the bending position were changed to the positions shown in Table 1.

(Examples 4 and 9)
As the front film, back film, and bottom film, dry lamination is performed using polyethylene terephthalate as the base film, biaxially stretched film of polyamide as the intermediate layer, and linear low density polyethylene (LLDPE) as the heat seal layer. Using a laminated film with a thickness of 193 μm laminated by the method, a rectangular film with a width of 300 mm and a length of 148 mm is used as a bottom film by folding it in two with a crease at half a position in the length direction as an inner film. Table 1 shows the dimensions of the front surface film, back surface film, inner surface film, pressure-sensitive adhesive layer, sealing seal, and bending position using a linear low-density polyethylene (LLDPE) single-layer film with a thickness of 100 μm. A package was obtained in the same manner as in Example 1 except that the position was changed to.

[Evaluation]
The following measurements were carried out on the packages obtained in Examples and Comparative Examples.

(Pressure resistance)
The UN standard pressure resistance was evaluated according to the UN standard (UN3373 P650). The case where the packaging bag did not break even at 95 kPa was evaluated as "○" (good pressure resistance), and the case where the packaging bag broke was evaluated as "x" (poor pressure resistance).
Further, a rubber sheet having a thickness of about 1 mm was fixed to the outside of the packaging bag using an adhesive tape on a part of the surface film that did not overlap with the inner film of the packaging bag. Then, at each temperature condition of 55 ° C. or -40 ° C., an injection needle connected to an air compressor is pierced into the rubber sheet on the surface film, and air is injected into the packaging bag at an amount of 1 L / min. , I kept sending air until the bag broke. Then, the pressure at the time of breaking the bag was measured and used as the withstand voltage strength (kPa) at each temperature. The higher the pressure resistance, the better the pressure resistance of the package.

(Leakage resistance)
In the above pressure resistance measurement, the leakage resistance of the package that did not break even at 100 kPa was evaluated.
A dye penetrant flaw detector (trade name "Color Check (registered trademark) penetrant FR-S" manufactured by Taseto Co., Ltd.) was placed inside the packaging bag and sealed in the same manner as described above to prepare a package. Then, under each temperature condition of 55 ° C. or −40 ° C., air was pressure-fed into the package using an air compressor to set the pressure to 100 kPa. Then, when the presence or absence of leakage was visually confirmed, no leakage was observed in all the packages evaluated.

(Easy to seal)
We asked 11 people to seal the packaging bags described in each example and comparative example, visually check the sealed part after packaging, and evaluate the ease of sealing by the number of packages with wrinkles in the sealed part. did. If there is no wrinkled package in the sealed part, it is evaluated as "○" (easy to seal), and if there is one or more wrinkled package, it is evaluated as "x" (difficult to seal). did.

(Comprehensive evaluation)
A package with good UN standard pressure resistance, pressure strength of 100 kPa or more, and easy to seal is marked with "○" (excellent pressure resistance and can easily seal the opening), UN standard pressure resistance or A package having poor sealability or a pressure resistance of less than 100 kPa was evaluated as "x" (poor pressure resistance or the opening cannot be easily sealed).

As shown in Table 1, the packages of Examples 1 to 9 were excellent in pressure resistance. In addition, the opening could be easily sealed.
In the packages of Comparative Examples 1 to 3, the back surface film and the pressure-sensitive adhesive layer could not be bonded to each other at the time of the second bending, and sufficient pressure resistance could not be obtained.

11 Packaging bag 12 Opening 13 Longitudinal opening side end 14 Longitudinal closing side end 15 Width direction end 161 Heat-sealing part between front film and back film 162 Heat-sealing part between front film, back film and inner film 163 Heat seal part between front film and bottom film 164 Heat seal part between back film and bottom film 17 Notch 2 Front film 3 Back film 41 Bottom film 42 Fold 5 Adhesive layer 61 Seal seal 62 Adhesive surface 63 Release paper 7 Inner film 81 Package 82 Contents 91 Longitudinal other end 92 Longitudinal one end 93 Closing part 94 Sealed part 95 First bending part 96 Second bending part 97 Laminated structure I
98 Laminated structure II
De Longitudinal direction Dw Width direction

Claims (12)

It comprises at least a front surface film, a back surface film, an adhesive layer provided on the front surface film, and a sealing seal provided on the back surface film.
The front surface film and the back surface film are bonded to each other at both end edges in the width direction and one end edge in the longitudinal direction to form a closed portion on one end side in the longitudinal direction, and a part of the front surface film and a part of the back surface film are formed. Is a package in which a sealing portion is formed on the other end side in the longitudinal direction by being bonded to the pressure-sensitive adhesive layer.
In the sealed portion, the front surface film, the back surface film, and the pressure-sensitive adhesive layer form the pressure-sensitive adhesive layer, the front surface film, the back surface film, the back surface film, the front surface film, the front surface film, and the back surface film in the thickness direction of the package. It has at least a laminated structure I laminated in this order, and a laminated structure II in which the pressure-sensitive adhesive layer, the back surface film, the front surface film, the front surface film, and the back surface film are laminated in this order.
A package body, wherein the laminated structure I and the laminated structure II are covered with the sealing seal. The package according to claim 1, wherein the laminated structure I is located on the other end side in the longitudinal direction with respect to the laminated structure II. An inner film is further provided between the front surface film and the back surface film.
The inner film is sandwiched between the front surface film and the back surface film, and is bonded at both edges in the width direction.
The laminated structure I is a laminated structure in which the pressure-sensitive adhesive layer, the front surface film, the inner film, the back surface film, the back surface film, the inner film, the front surface film, the front surface film, the inner film, and the back surface film are laminated in this order.
The package according to claim 1 or 2, wherein the laminated structure II is a laminated structure in which an adhesive layer, a back surface film, an inner film, a front surface film, a front surface film, an inner film, and a back surface film are laminated in this order. The package according to any one of claims 1 to 3, wherein the radius of curvature at the bent portion where the front surface film and the back surface film are bent is 10 mm or less in the sealed portion. The package according to any one of claims 1 to 4, wherein the front surface film and the back surface film are bonded to each other via a bottom film at one end in the longitudinal direction. The front surface film and the back surface film are bonded together at both end edges in the width direction and one end edge in the longitudinal direction to form a closed portion on one end side in the longitudinal direction and an opening on the other end side in the longitudinal direction.
An adhesive layer having the same width as the width of the surface film is provided on the outside of the packaging bag of the surface film.
A sealing seal having at least one side as an adhesive surface is provided on the outside of the packaging bag of the back surface film.
The adhesive surface is a packaging bag in which a part is attached to the back surface film and the remaining part is attached to a paper pattern.
The packaging bag is bent along the longitudinal direction, and the longitudinal opening side end of the surface film is attached to a part of the adhesive layer.
The packaging bag is further bent along the longitudinal direction, and a part of the back surface film is attached to another part of the pressure-sensitive adhesive layer.
The packaging comprises attaching the remaining portion of the pressure-sensitive adhesive surface to the surface film so that the sealing seal covers the portion and the other portion of the pressure-sensitive adhesive layer. Manufacturing method. The front surface film and the back surface film are bonded together at both end edges in the width direction and one end edge in the longitudinal direction to form a closed portion on one end side in the longitudinal direction and an opening on the other end side in the longitudinal direction.
An adhesive layer having the same width as the width of the surface film is provided on the outside of the packaging bag of the surface film.
A sealing seal having at least one side as an adhesive surface is provided on the outside of the packaging bag of the back surface film.
In a packaging bag in which a part of the adhesive surface is attached to the back surface film and the rest is attached to a paper pattern.
The packaging bag is bent along the longitudinal direction, and the longitudinal opening side end of the surface film is attached to a part of the adhesive layer.
The packaging bag is further bent along the longitudinal direction, and a part of the back surface film is attached to another part of the pressure-sensitive adhesive layer.
The packaging bag comprises affixing the remaining portion of the pressure-sensitive adhesive surface to the surface film so that the sealing seal covers the portion and the other portion of the pressure-sensitive adhesive layer. Use of. A packaging bag in which a front film and a back film are bonded together at both ends in the width direction and one end edge in the longitudinal direction to form a closed portion on one end side in the longitudinal direction and an opening on the other end side in the longitudinal direction. There,
An adhesive layer having the same width as the width of the surface film is provided on the outside of the packaging bag of the surface film.
A sealing seal having at least one side as an adhesive surface is provided on the outside of the packaging bag of the back surface film.
A part of the adhesive surface is attached to the back surface film, and the remaining part is attached to the paper pattern.
When the length in the longitudinal direction of the pressure-sensitive adhesive layer is a, and the length in the longitudinal direction from the end in the longitudinal opening side of the surface film to the end in the longitudinal direction of the pressure-sensitive adhesive layer is b. ,
From a position at a distance of (2ba) / 4 in the longitudinal direction from the longitudinal opening side end of the back surface film, the longitudinal inner end of the part of the adhesive surface is longitudinally oriented from the longitudinal opening side end. It is between the position of (6b-a) / 8 and
The longitudinal outer end of the remaining portion of the adhesive surface extends from the longitudinal opening side end of the back surface film to a position at a distance of (2ba) / 4 in the longitudinal direction from the longitudinal opening side end. between,
A packaging bag characterized by that. The packaging bag according to claim 8, wherein the ratio of a to b ((a / b) × 100) is 15 to 50%. An inner film is further provided between the front surface film and the back surface film.
The longitudinal length of the inner film is shorter than the longitudinal length of the front surface film and the back surface film.
The length in the width direction of the inner film is the same as the length in the width direction of the front surface film and the back surface film.
The inner film is bonded to the longitudinal opening side edge of the front surface film or the back surface film at the longitudinal opening side edge of the packaging bag.
The packaging bag according to claim 8 or 9, wherein the inner film is sandwiched and bonded between the front surface film and the back surface film at both widthwise edges of the packaging bag. Claim that the longitudinal length of the inner film is longer than the longitudinal length from the longitudinal opening side end of the front surface film or the back surface film to the longitudinal opening side end of the pressure-sensitive adhesive layer. The packaging bag according to any one of 8 to 10. The packaging bag according to any one of claims 8 to 11, wherein the front surface film and the back surface film are bonded to each other via a bottom film at one end in the longitudinal direction.

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