JP7083138B2 - Packaging film - Google Patents

Description

The present invention relates to a packaging film for covering the upper opening of a container containing an container containing, for example, oranges, apples, grapes, strawberries, papayas, mangoes, kiwis, fruits including peaches and various vegetables.

The above-mentioned packaging film is used when the film body is put on the upper opening of the container containing the container and sold at a store or the like. The product name, production area, etc. are displayed on the film body to provide the purchaser with product information and prevent the product from spilling out of the container. (See, for example, Patent Document 1).

Utility Model Registration No. 3106302

The packaging film is provided with an adhesive layer on each of the back surfaces of both sides extending outward in the width direction from both ends in the width direction of the film body, and the both sides are folded toward the back side to provide adhesive on the back surfaces of the both sides. A release agent layer that can be attached to and peelable from the back surface of the film body is provided on the back surface of the film body, and both sides of the film body are gripped when covering the upper opening of the container containing the contained material. By pulling it to both sides, the adhesive layers on both sides are exposed by peeling the both sides from the back surface of the film body, and the film body is placed around the opening of the container via the adhesive layer. It is fixed to the side wall of the.

Further, in order to securely fix the film body to the side wall portion around the opening of the container with the adhesive layers provided on both sides thereof, a certain amount of large adhesive force is required. Therefore, a large pulling force is required when grasping both sides and pulling them to both sides to peel them off from the film body, and especially for weak women, the work of peeling both sides from the film body is a troublesome work that requires a lot of labor. There was room for improvement.

In view of the above situation, an object of the present invention to solve the problem is to provide a packaging film in which both sides can be easily peeled off from the film body while the film body can be securely fixed to the container. ..

In order to solve the above-mentioned problems, the packaging film of the present invention is provided with an adhesive layer on each of the back surfaces of both side portions extending outward in the width direction from both ends in the width direction of the film body, and the both sides are placed on the back surface side. A release agent layer that can be folded and attached to the back surface of the back surface of the film body and can be peeled off is provided on the back surface of the film body, and the upper opening of the container containing the container is provided. The adhesive layer is exposed by peeling the both sides from the back surface of the film body by grasping the folded both sides and pulling them to both sides when covering the film body, and the pressure-sensitive adhesive layer is exposed through the pressure-sensitive adhesive layer. A packaging film having both sides fixed around the upper opening of the container, wherein the pressure-sensitive adhesive layer comprises a plurality of pressure-sensitive adhesive layers formed at intervals in the width direction. The first pressure-sensitive adhesive layer located on the end side of the plurality of pressure-sensitive adhesive layers is composed of a weak pressure-sensitive adhesive layer having a smaller adhesive force than the second pressure-sensitive adhesive layer located on the side separated from the end side. It is characterized by.

According to such a configuration, when covering the upper opening of the container containing the contained material, the first adhesive layer, which is a weak adhesive layer having a small adhesive force, is obtained by grasping the folded both sides and pulling them to both sides. Since it is peeled off from the layer, it can be easily peeled off even by a particularly weak woman. Then, after peeling off the first pressure-sensitive adhesive layer, the second pressure-sensitive adhesive layer is peeled off with momentum on both sides, and the second pressure-sensitive adhesive layer having a larger adhesive force than the first pressure-sensitive adhesive layer. Since the adhesive strength can be made smaller than that in the case of being composed of one pressure-sensitive adhesive layer, even a weak woman can easily peel it off. Then, by peeling both sides from the film body, the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer are exposed, and the film body is firmly attached to the periphery of the upper opening of the container via the two pressure-sensitive adhesive layers. Can be fixed to.

Further, in the packaging film of the present invention, the area of the first pressure-sensitive adhesive layer may be smaller than the area of the second pressure-sensitive adhesive layer.

According to the above configuration, by making the area of the first pressure-sensitive adhesive layer smaller than the area of the second pressure-sensitive adhesive layer, the adhesive strength of the first pressure-sensitive adhesive layer is smaller than the adhesive strength of the second pressure-sensitive adhesive layer. can do.

Further, in the packaging film of the present invention, each of the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer is formed in a substantially rectangular shape extending in a direction substantially orthogonal to the width direction and having substantially the same length. The width dimension in the width direction may be shorter in the first pressure-sensitive adhesive layer than in the second pressure-sensitive adhesive layer.

According to the above configuration, each of the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer is formed in a substantially rectangular shape extending in a direction substantially orthogonal to the width direction with substantially the same length, and the width dimension in the width direction is large. By making the first pressure-sensitive adhesive layer shorter than the second pressure-sensitive adhesive layer, the adhesive strength of the first pressure-sensitive adhesive layer can be made smaller than the adhesive strength of the second pressure-sensitive adhesive layer.

Further, in the packaging film of the present invention, the second pressure-sensitive adhesive layer is composed of a strip-shaped pressure-sensitive adhesive layer that is continuous in a direction substantially orthogonal to the width direction, and the first pressure-sensitive adhesive layer is substantially orthogonal to the width direction. It may be composed of a plurality of pressure-sensitive adhesive layers provided at intervals in the direction of the surface.

According to the above configuration, the second pressure-sensitive adhesive layer is composed of a strip-shaped pressure-sensitive adhesive layer that is continuous in a direction substantially orthogonal to the width direction, and the first pressure-sensitive adhesive layer is spaced apart in a direction substantially orthogonal to the width direction. The adhesive strength of the first pressure-sensitive adhesive layer can be made smaller than the adhesive strength of the second pressure-sensitive adhesive layer by being composed of the plurality of pressure-sensitive adhesive layers provided.

According to the present invention, the first pressure-sensitive adhesive layer located on the end side of the plurality of pressure-sensitive adhesive layers is from a weak pressure-sensitive adhesive layer having a smaller adhesive force than the second pressure-sensitive adhesive layer located on the side away from the end. By being configured, it is possible to provide a packaging film in which both sides can be easily peeled off from the film body while the film body can be securely fixed to the container.

It is a perspective view which looked at the packaging film of this invention from the back side. It is the bottom view which shows the one end part of the wrapping film, and shows the state before folding one end part, and was seen from the back surface. It is a vertical sectional view which shows the state just before folding both sides of the wrapping film. It is a vertical sectional view which shows the state which both sides of the wrapping film are peeled off from a film body. It is a perspective view which shows the state just before attaching both sides which peeled off the packaging film in a state which covered the upper opening of a container to the side wall part of a container. FIG. 3 is a perspective view showing a state in which both sides of the packaging film, which is peeled off while covering the upper opening of the container, are attached to the side wall of the container. It is a side view which shows the state which peeled off both sides of the packaging film in a state which covered the upper opening of a container, and attached to the side wall part of a container. It is the bottom view which shows the one side part of the packaging film of another embodiment, and shows the state before folding one side part, seen from the back surface.

Hereinafter, embodiments of the packaging film according to the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 3, the packaging film F includes a film body 1 and both side portions 2 and 2 extending outward in the width direction from both ends in the width direction (longitudinal direction) of the film body 1. In the following, the width direction of the packaging film F will be described as the longitudinal direction, and the direction orthogonal to the width direction will be described as the lateral direction.

The film body 1 has a wide first film portion 1A and dimensions in the longitudinal direction from both ends in the width direction of the first film portion 1A are shorter than those of the first film portion 1A and shorter than the first film portion 1A. The second film portions 1B and 1B having small dimensions in the direction are provided. The first film portion 1A is formed in a substantially square shape in which the dimensions in the longitudinal direction and the dimensions in the lateral direction are substantially the same, and arcuate portions 1C are formed at each of the four corners. The second film portion 1B extends outward (end side) in the longitudinal direction from the pair of arcuate portions 1C and 1C in the lateral direction. Further, the second film portions 1B and 1B are configured to have the same shape and the same size, and are configured to have a rectangular shape in which the dimension in the lateral direction is longer than the dimension in the longitudinal direction. The shape of the film body 1 is not limited to that shown in the figure. The side portions 2 and 2 are portions having the same dimensions as the second film portions 1B and 1B in the lateral direction and extending outward in the longitudinal direction from both ends in the longitudinal direction of the second film portions 1B and 1B, respectively. Both ends of the second film portions 1B and 1B in the longitudinal direction correspond to the creases 7 and 7 described later.

Further, the packaging film is used to cover the upper opening 4K of the container 4 containing the container 3 (see FIG. 6), and the name of the container 3 and the name of the container 3 are displayed on the front and back surfaces of the corona discharge-treated front and back surfaces. The place of origin etc. is printed. In FIGS. 1 and 2, the visible side is the back surface.

Further, the packaging film is made of a single film made of a transparent synthetic resin such as polypropylene or polystyrene, and the pressure-sensitive adhesive layer 5 is provided on each of the back surfaces of the both side portions 2 and 2. The pressure-sensitive adhesive layer 5 is formed inside the both side portions 2 and 2 in the lateral direction. Further, each of the inner surfaces of the second film portions 1B and 1B is provided with a strip-shaped release agent layer 6 parallel to the pressure-sensitive adhesive layer 5. The release agent layer 6 is formed so as to extend over both ends of the second film portions 1B and 1B in the lateral direction. Further, the longitudinal dimension of the release agent layer 6 is larger than the longitudinal dimension of the pressure-sensitive adhesive layer 5.

Each release agent layer 6 is made of a silicone-based resin, and the liquid resin is applied to the film body 1 in a strip shape and then cured by heating to a predetermined temperature to form a thin film-like release agent layer. Further, each release agent layer 6 can be attached by folding both side portions 2 and 2 to the back surface side at the crease 7 and aligning them with the adhesive layers 5 and 5 on the back surface of the second film portions 1B and 1B, respectively. It is configured to be peelable. By providing the pressure-sensitive adhesive layers 5 and 5 made of a peelable and reattachable pressure-sensitive adhesive, a packaging film that does not require a release tape (release paper) can be formed.

By combining the pressure-sensitive adhesive layers 5 and 5 and the release agent layers 6 and 6 as described above, the both side portions 2 and 2 are maintained in a folded state on the back surface of the film body 1.

As shown in FIGS. 5 to 7, the container 4 is made of various synthetic resins and has a rectangular box shape with an open upper end, and the container 3 contained in the container 4 includes strawberry and apple. , Grape, strawberry, papaya, mango, kiwi, various fruits including peach, and various vegetables may be used.

The pressure-sensitive adhesive layers 5 and 5 are formed of an acrylic pressure-sensitive adhesive, and each pressure-sensitive adhesive layer 5 is composed of a plurality of (two in this embodiment) pressure-sensitive adhesive layers formed at intervals in the longitudinal direction. There is. The first pressure-sensitive adhesive layer 5A located on the end side of the plurality of pressure-sensitive adhesive layers is composed of a weak pressure-sensitive adhesive layer having a smaller adhesive force than the second pressure-sensitive adhesive layer 5B located on the side away from the end. There is. Specifically, each of the first pressure-sensitive adhesive layer 5A and the second pressure-sensitive adhesive layer 5B is formed in a substantially rectangular shape extending in the lateral direction with substantially the same length, and the second pressure-sensitive adhesive layer 5B is formed in the longitudinal direction. The width dimension W1 of the first pressure-sensitive adhesive layer 5A in the width direction (longitudinal direction) is shorter than the width dimension W2 (see FIG. 2). As a result, the area of the first pressure-sensitive adhesive layer 5A becomes smaller than the area of the second pressure-sensitive adhesive layer 5B, and the first pressure-sensitive adhesive layer 5A is a weak pressure-sensitive adhesive layer having a smaller adhesive strength than the second pressure-sensitive adhesive layer 5B. To configure. The first pressure-sensitive adhesive layer 5A is arranged inward in the longitudinal direction at a predetermined distance from the end, and a picking allowance 8 that can be grasped by a finger is provided from the tip of the side portion 2 to the tip of the first pressure-sensitive adhesive layer 5A. It is formed between the side edges. The longitudinal distance L1 between the first pressure-sensitive adhesive layer 5A and the second pressure-sensitive adhesive layer 5B is set to be smaller than the longitudinal distance L2 of the picking allowance 8 (see FIG. 3).

When covering the upper opening 4K of the container 4 containing the container 3, the gripping margins 8 of the folded side portions 2 and 2 are grasped and pulled horizontally (outside in the longitudinal direction, in the direction of the arrow in FIG. 4). As a result, the first pressure-sensitive adhesive layer 5A, which is a weak pressure-sensitive adhesive layer having a small adhesive strength, is peeled off from the release agent layer 6, so that even a particularly weak woman can easily peel it off. Further, as shown in FIG. 4, when the gripping allowance 8 on both side portions 2 and 2 is grasped and pulled to both sides in the horizontal direction, the pressure-sensitive adhesive layers 5 and 5 and the release agent layers 6 and 6 on both side portions 2 and 2 are formed. Since the portion to which the two are connected rises vertically, the picking allowances 8 and 8 are in a horizontal posture facing the horizontal direction, so that the picking allowances 8 and 8 can be easily pulled in the horizontal direction. Then, after the first pressure-sensitive adhesive layer 5A is peeled off from the release agent layer 6, the second pressure-sensitive adhesive layer 5B is subsequently pulled from the release agent layer 6 with the both side portions 2 and 2 having momentum, and the first adhesion is performed. Since the adhesive strength of the second adhesive layer 5B, which has a larger adhesive strength than that of the agent layer 5A, can be reduced as compared with the case where the adhesive strength of the second adhesive layer 5B is composed of one adhesive layer, it can be easily peeled off even by a particularly weak woman. .. Then, by peeling the both side portions 2 and 2 from the film body 1, the first adhesive layer 5A and the second adhesive layer 5B of both side portions 2 and 2 are exposed, and the two adhesive layers 5A and 5B are exposed. Both side portions 2 and 2 can be firmly fixed to the side wall portion 4A around the upper opening 4K of the container 4 (see FIGS. 6 and 7).

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention.

For example, the first pressure-sensitive adhesive layer 5A and the second pressure-sensitive adhesive layer 5B shown in FIG. 2 may be formed as shown in FIG. That is, the second pressure-sensitive adhesive layer 5B is composed of a strip-shaped rectangular pressure-sensitive adhesive layer that is continuous in a direction substantially orthogonal to the width direction, and the first pressure-sensitive adhesive layer 5A is evenly spaced in a direction substantially orthogonal to the width direction. It may be composed of a plurality of pressure-sensitive adhesive layers 5a, 5a, 5a having the same shape (rectangular shape) and having the same size. With this configuration, the area of the first pressure-sensitive adhesive layer 5A is smaller than the area of the second pressure-sensitive adhesive layer 5B, and the first pressure-sensitive adhesive layer 5A has a smaller adhesive force than the second pressure-sensitive adhesive layer 5B. Become. The plurality of pressure-sensitive adhesive layers 5a, 5a, 5a may have different sizes or different shapes. In FIG. 8, the longitudinal dimension of the first pressure-sensitive adhesive layer 5A and the longitudinal dimension of the second pressure-sensitive adhesive layer 5B are the same. Further, the number of the plurality of pressure-sensitive adhesive layers 5a, 5a, 5a can be freely changed.

Further, in the above embodiment, the two pressure-sensitive adhesive layers 5A and 5B are provided, but three or more pressure-sensitive adhesive layers may be provided. In this case, the adhesive strength of the pressure-sensitive adhesive layer located at the end of the three or more pressure-sensitive adhesive layers is made smaller than the adhesive strength of the other plurality of pressure-sensitive adhesive layers.

Further, in the above embodiment, the film main body 1 is composed of the first film portion 1A and the two second film portions 1B and 1B, but the film main body 1 may be composed of one film portion. Further, the packaging film F may be formed in a rectangular shape, a square shape, an elliptical shape, or the like.

Further, in the above embodiment, the adhesive layer 5 is provided on each of the back surfaces of the side portions 2 and 2 extending outward in the width direction from both ends in the width direction of the film body 1, and both side portions 2 and 2 are folded to the back surface side on both sides. The adhesive layer 5 on the back surface of the portions 2 and 2 is provided on the back surface of the film body 1 so that the adhesive layer 5 on the back surface of the film body 1 can be attached and peeled off. Adhesive layers 5 are provided on the back surfaces of both ends in the width direction of the film body 1, and the back surfaces of the side portions 2 and 2 are provided on the back surfaces of the side portions 2 and 2 extending outward in the width direction from both ends in the width direction of the film body 1. A release agent layer 6 that can be folded sideways and attached to the back surface of the film body 1 and can be peeled off may be provided on each of the back surfaces of the both side portions 2 and 2. In this case, when covering the upper opening 4K of the container 4 containing the container 3, the folded both side portions 2 and 2 are grasped and pulled to both sides, whereby the both side portions from the back surface of the film body 1 are obtained. For packaging, the adhesive layer 5 is exposed by peeling off 2 and 2, and the both side portions 2 and 2 are fixed around the upper opening 4K of the container 4 via the adhesive layer 5. In the film, the pressure-sensitive adhesive layer 5 is composed of a plurality of pressure-sensitive adhesive layers formed at intervals in the width direction, and is located on a side of the plurality of pressure-sensitive adhesive layers separated from both side portions 2 and 2. The first pressure-sensitive adhesive layer is composed of a weak pressure-sensitive adhesive layer having a smaller adhesive force than the second pressure-sensitive adhesive layer located on both sides 2 and 2. The weak pressure-sensitive adhesive layer can be realized by making the area of the first pressure-sensitive adhesive layer smaller than the area of the second pressure-sensitive adhesive layer, as in the embodiment.

Further, in the above embodiment, by making the area of the first pressure-sensitive adhesive layer 5A smaller than the area of the second pressure-sensitive adhesive layer 5B, the first pressure-sensitive adhesive layer 5A has a higher adhesive force than the second pressure-sensitive adhesive layer 5B. However, the thickness of the first pressure-sensitive adhesive layer 5A applied to the film body 1 is made thinner than the thickness of the second pressure-sensitive adhesive layer 5B applied to the film body 1. The pressure-sensitive adhesive layer 5A may be formed as a weak pressure-sensitive adhesive layer having a smaller adhesive strength than the second pressure-sensitive adhesive layer 5B. In this case, the area of the first pressure-sensitive adhesive layer 5A may be the same as or substantially the same as the area of the second pressure-sensitive adhesive layer 5B, but in some cases, the area of the first pressure-sensitive adhesive layer 5A may be the area of the second pressure-sensitive adhesive. By making the area smaller than the area of the layer 5B, the first pressure-sensitive adhesive layer 5A may be formed into a weak pressure-sensitive adhesive layer having a lower adhesive strength than the second pressure-sensitive adhesive layer 5B.

1 ... film body, 1A ... first film part, 1B ... second film part, 1C ... arcuate part, 2 ... both sides part, 3 ... container, 4 ... container, 4A ... side wall part, 4K ... upper opening, 5 ... Adhesive layer, 5A ... First adhesive layer, 5a ... Adhesive layer, 5B ... Second adhesive layer, 6 ... Release agent layer, 7 ... Folds, 8 ... Picking allowance, F ... Packaging film, L1 , L2 ... distance, W1, W2 ... width dimension

Claims (4)

The film body that covers the upper opening of the container,
Both sides extending outward in the width direction from both ends in the width direction of the film body , and having both sides fixed around the upper opening.
Adhesive layers are provided on the back surfaces of both sides , and the adhesive layers on both sides are folded to the back side so that the adhesive layers on the back surfaces of both sides can be attached to and peeled off from the back surface of the film body. A release agent layer is provided on the back surface of the film body.
When covering the upper opening of the container containing the contained material, the adhesive is peeled off from the back surface of the film body by grasping the folded both sides and pulling them to both sides. A packaging film in which a layer is exposed and both sides thereof are fixed to the periphery via the pressure-sensitive adhesive layer.
The pressure-sensitive adhesive layer is composed of a plurality of pressure-sensitive adhesive layers formed at intervals in the width direction, and the first pressure-sensitive adhesive layer located on the end side of the plurality of pressure-sensitive adhesive layers is separated from the end side. A packaging film characterized by being composed of a weak adhesive layer having a smaller adhesive force than a second adhesive layer located on the side. The packaging film according to claim 1, wherein the area of the first pressure-sensitive adhesive layer is smaller than the area of the second pressure-sensitive adhesive layer. Each of the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer is formed in a substantially rectangular shape extending in a direction substantially orthogonal to the width direction with substantially the same length, and the width dimension in the width direction is the second pressure-sensitive adhesive. The packaging film according to claim 2, wherein the first pressure-sensitive adhesive layer is shorter than the agent layer. The second pressure-sensitive adhesive layer is composed of a strip-shaped pressure-sensitive adhesive layer that is continuous in a direction substantially orthogonal to the width direction, and a plurality of the first pressure-sensitive adhesive layers are provided at intervals in a direction substantially orthogonal to the width direction. The packaging film according to claim 2, wherein the film is composed of the pressure-sensitive adhesive layer of the above.

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