JPH092504A - Heat-shrinkable cylindrical body - Google Patents

Abstract

PURPOSE: To provide a heat-shrinkable cylindrical body such as a cap seal with an unsealing tape, capable of being easily produced and being easily opened. CONSTITUTION: A heat-shrinkable film 4 is formed into a cylindrical shape by lapping one edge 4a of the film 4 on the other edge thereof, and an unsealing tape 2 is provided, which is stuck on an inner face side of the heat-shrinkable film 4 in the peripheral direction so that one end 2a of the unsealing tape 2 is projected from the overlapping portion between one edge 4a of the heat- shrinkable film 4 and the other edge thereof. A plurality of breaking means 3 capable of breaking the heat-shrinkable film 4 in a direction substantially parallel with the tape 2 are formed at one edge 4a of the heat-shrinkable film 4 and, moreover, in the vicinity of both sides of one end 2a of the unsealing tape 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a heat-shrinkable tubular body used as a cap seal or the like which is closely attached to a container such as a lid by heat shrinkage.

[0002]

2. Description of the Related Art Conventionally, in a synthetic resin container 21 or the like having a lid 22 capped thereon, a lid 22 and a portion near the connecting portion of the lid 22 and the container 21 are provided for accident prevention and hygiene reasons due to careless opening. As the heat-shrinkable tubular body used as the cap seal 20 attached over the entire length, as shown in FIG. 3A, a heat-shrinkable film formed in a tubular shape is attached to the lid 22 and the container body 21. However, the thing which made this heat-shrink and made it adhere | attach was used.

An opening tape 23 for facilitating the unsealing is usually provided on the cap seal 20.
Is adhered along the circumferential direction on the inner surface side, and one end 23a is provided so as to slightly project from the polymerized edge of the heat-shrinkable film to the outer surface, and when the cap seal 20 is opened, The projected one end 23a of the unsealing tape 23 is gripped, and the heat-shrinkable film is ruptured in the circumferential direction by the unsealing tape 23 to unseal (see FIG. 3B).

[0004]

When the unsealing tape 23 as described above is pulled in the circumferential direction of the cap seal 20 to break the heat-shrinkable film, tear strength such as polyethylene terephthalate as the heat-shrinkable film is not increased. When a high material is used, it is difficult to break by simply grasping and pulling the opening tape 23. Therefore, the notches 24 as shown in FIG. It is provided so as to induce the fracture of.

In order to manufacture the cap seal 20 having the cutouts 24, it is usual to form the cutouts 24 at the ends of the heat-shrinkable film, and then open the opening tape 23 between the cutouts 24. If the opening tape 23 is slightly misaligned at this time, it cannot be attached between the cutouts 24 and the cutout tape is attached on the cutouts 24. It may not be available as 24.

In order to prevent such misalignment, it is conceivable to form the notches 24 with a space considerably wider than the width of the unsealing tape 23.
When the heat-shrinkable film is broken from the notch 24 when the distance between the notch 23 and the notch 24 is too large, the heat-shrinkable film is inwardly directed toward the opening tape 23 as shown in FIG. It is difficult to break because the cut end is blocked by the opening tape 23 because it is broken at an angle due to the force of, and the appearance of the cut end of the cap seal 20 after the break is not formed parallel to the circumferential direction, it is said that the appearance is not good. There were difficulties.

The present invention has been made to solve the above problems, and an object thereof is to provide a heat-shrinkable tubular body such as a cap seal with an unsealing tape which is easy to manufacture and can be easily unsealed. And

[0008]

Means for Solving the Problems The present invention has been made to solve the above problems by superposing one edge 4a of a heat-shrinkable film 4 on the other edge 4b. Then, the one end 2a projects from the inner surface side of the heat-shrinkable film 4 in the circumferential direction from between the overlapping portions of the one edge 4a and the other edge 4b of the heat-shrinkable film 4. The heat-shrinkable film is provided with the unsealing tape 2 attached as
A plurality of breaking means 3 capable of breaking the heat-shrinkable film 4 in a direction substantially parallel to the unsealing tape 2 is formed at one end 4a of 4 and near both ends of the one end 2a of the unsealing tape 2. Especially.

[0009]

In other words, the unsealing tape is provided on one edge 1a of the heat shrinkable film 1 as described above and near both sides of the unsealing tape 2 provided so as to project from the overlapping portion of the heat shrinkable film 4. Since a plurality of fine breaking means 3 capable of breaking the heat-shrinkable film 4 in the direction parallel to 2 are formed, the breaking means 3 can be used even when a slight misalignment occurs when sticking the unsealing tape. Being formed on both sides of the unsealing tape 2, the heat shrink film 4 can easily be broken along the width of the unsealing tape 2.

Further, since the heat-shrinkable film 4 can be ruptured along the opening tape 2, the rupture can be performed smoothly and the cut end of the heat-shrinkable film 4 can be formed in a beautiful cut parallel to the circumferential direction. .

Further, when the breaking means 3 comprises a fine cutout formed by cutting out at least part of the thickness of the heat shrinkable film 4, when the heat shrinkable film 4 is heat shrunk, The edge of the heat-shrinkable film 4 on which the breaking means 3 is formed can be prevented from being deformed, and the outer appearance is not damaged even when the heat-shrinkable film 4 is closely attached to the container.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the heat-shrinkable tubular body of the present invention is used as a cap seal will be described below with reference to the drawings.

First, the structure of the cap seal will be described. 1 (a) (b) to FIG. 3 shows a cap seal body 1 made of a heat-shrinkable film 4, which is one end 4a of the heat-shrinkable film 4.
The other end 4b is polymerized on the other end 4b and formed into a tubular shape by bonding, and further, after being externally mounted over a container 12 made of a synthetic resin or the like and a lid 13 capped on the container 12, It is heat-shrinked and attached in close contact.

The heat-shrinkable film 4 of the material of the cap seal body 1 is a film obtained by subjecting a thermoplastic resin such as polyvinyl chloride, polyethylene terephthalate, polystyrene or the like to a heat-shrinking treatment to impart heat-shrinkability, and a tubular shape. A material that contracts in the circumferential direction when formed into a suitable shape is appropriately used.

Reference numeral 2 denotes an unsealing tape 2 made of synthetic resin which is circumferentially adhered to the inner surface of the cap seal body 1, and one end 2a of the unsealing tape 2 has the heat shrink film 4
It is formed so as to project to the outer surface of the cap seal main body 1 from between the one end edge portion 4a and the other end edge portion 4b which are overlapped with each other.

The opening tape 2 is attached to a position slightly lower than the lid 13 after mounting, and the lid 13 is removed from the container 12 when the cap seal body 1 is broken and the upper portion is removed. It is provided so that you can

Reference numeral 3 shown in FIG. 1 (b) is the opening tape 2
In order to tear the heat-shrinkable film 4 in a direction parallel to, the breaking means 3 is a breaking means formed in a large number in one edge 4a on the upper side of the polymerized heat-shrinking film 4. For example, a minute scratch that does not penetrate the heat-shrinkable film 4 is formed near the surface of the edge 4a of the heat-shrinkable film 4.

Next, a case of manufacturing the cap seal 10 having such a structure will be described. First, FIG.
As shown in (a), a large number of fine breaking means 3 are formed on one end 4a of the heat shrink film 4 having a long shape.

The breaking means 3 is a fine notch-shaped scratch formed in the width direction of the heat-shrinkable film 4, and is formed near one surface so as not to penetrate the heat-shrinkable film 4.

Next, an unsealing tape 2 made of a narrow synthetic resin film is adhered to one surface of the heat shrinkable film 4 with an adhesive or the like at a predetermined interval. At this time, the heat-shrinkable film 4 is bonded so that one end 2a of the unsealing tape 2 projects from one edge 4a of the heat-shrinkable film 4.

Further, the heat-shrinkable film 4 to which the unsealing tape 2 is adhered is arranged such that the one end 4a is connected to the other end so that the surface to which the unsealing tape 2 is adhered is the inner side. The heat-shrinkable film 4 is polymerized on the portion 4b, and the polymerized portion is bonded with an adhesive or the like to form a heat-shrinkable film 4 in a long tubular shape (see FIG. 2).
(See (b)), and then cut in the longitudinal direction to form the cap seal body 1.

At this time, one end portion 2a of the unsealing tape 2 projects to the outer surface from the lower side of the one end edge portion 4a of the heat-shrinkable film 4 which is superposed.

Further, the container 12 made of synthetic resin or the like having the lid 13 capped at the upper opening is fitted with the cylindrical cap seal body 1 and heat-treated. It is contracted and brought into close contact with the container 12. As this container, any container may be used as long as it is a container made of synthetic resin, glass or the like and having an arbitrary shape and capable of performing heat treatment for heat shrinkage.

Since the breaking means 3 is formed so as not to penetrate the heat shrinkable film 4 during the heat shrinkage,
Even when heat-shrinking, the heat-shrinking film 4 is heat-shrinked in a flat state without being deformed by the breaking means 3.

Next, when opening the cap seal 10 attached to the container 12 as described above, first, as shown in FIG. 1B, one end edge 4a of the heat shrinkable film 4 is exposed to the outer surface. Hold one end 2a of the unsealing tape 2 protruding to
The heat-shrinkable film 4 is lifted up and pulled in the circumferential direction so that the heat-shrinkable film 4 is broken from one edge 4a.

At this time, since a large number of the breaking means 3 as described above are formed at the one end edge portion 4a, the breaking means 3 is used as a trigger to heat at the substantially same position as the side edge portion of the unsealing tape 2. The shrink film 4 is not broken, the cut end 5 is not inclined, and a horizontal opening is formed along the circumferential direction of the cap seal body 1.

Then, the broken cap seal body 1
The lid 13 can be opened by removing the upper part of the. In this way, when the container is used by removing the upper portion of the cap seal 10 from the lid body 13, the heat shrinkable film 4 remaining on the container 12 side as described above has the cut end 5 broken by the unsealing tape. It is formed horizontally, and even if the container 12 is used with the remaining heat-shrinkable film 4 attached, it does not spoil the appearance.

Although the breaking means 3 is formed over the entire one edge 4a of the heat-shrinkable film 4 in the above embodiment, the breaking means 3 is formed over the one edge 4a of the heat-shrinkable film 4. It is not a condition that the opening tape 2 is formed on the entire surface, and a plurality of opening tapes 2 may be formed in the vicinity of both sides of the tape. However, when the unsealing tape 2 is bonded to the heat-shrinkable film 4, the breaking means 3 must be formed on both sides of the unsealing tape 2 even if they are misaligned.
The breaking means 3 is preferably formed to be considerably wider than the width of the tear tape 2.

Further, in the above-mentioned embodiment, the breaking means 3 is formed by scratching the surface so as not to penetrate the heat shrinkable film 4. However, in addition to such breaking means 3, for example, 2
In the laminated film of more than one layer, the heat-shrinkable film may have a notch formed in only one of them, or the notch penetrating the heat-shrinkable film 4 may be formed. However, it is preferable that the edge portion 4a on which the breaking means 3 is formed even when heat-shrinking is a breaking means 3 having a size, depth, and shape that does not deform due to heat shrinkage.

Further, in the above embodiment, the unsealing tape 2 is adhered over the entire circumference of the cap seal main body 1, but it is projected at one end edge portion 4a of the heat shrinkable film 4, for example, and one portion in the circumferential direction from this portion. It may be an unsealing tape provided only on the part. What is essential is that the opening tape is provided so that one end of the heat-shrinkable film projects from the edge of the heat-shrinkable film so as to induce the breakage of the heat-shrinkable film in the circumferential direction.

Further, although the opening tape 2 is formed of a synthetic resin film in the above embodiment, the material of the opening tape is not particularly limited, and the point is that tearing is induced when the heat shrinkable film 4 is opened. It is only necessary to use a tape having a narrow width capable of being applied, and a method for adhering to the heat shrinkable film may be adhesion by heat welding or the like other than the adhesive.

Further, as the unsealing tape 2, a film which shrinks in substantially the same manner as the heat shrinkable film may be used,
In this case, the heat-shrinkable film 4 shrinks and the opening tape 2 does not wrinkle, which is preferable.

The heat-shrinkable tubular body of the present invention is not limited to the cap seal as shown in the above embodiment,
It can also be used for shrink labels and sleeve packaging of multiple items.

[0034]

As described above, since the heat-shrinkable tubular body of the present invention can break the heat-shrinkable film with the same width as the width of the unsealing tape at the time of unsealing, the breaking is easy and reliable. In addition, since the cut end is beautifully formed along the opening tape, for example, when used as a cap seal, after breaking the heat shrink film from the opening tape, the container is left with the remaining heat shrink film attached. It does not spoil the appearance when used.

Further, even when the opening tape is attached, even if a slight displacement occurs, the breaking means is always provided in the vicinity of both sides of the opening tape, so that the opening tape can be easily attached. It is possible to easily automate the production of the heat-shrinkable tubular body, reduce the production cost, and obtain the heat-shrinkable tubular body economically.

Furthermore, since the end portion of the heat-shrinkable film is not deformed when heat-shrinkable, a heat-shrinkable tubular body which can be easily and satisfactorily opened with an unsealing tape and has a good appearance at the same time is obtained. You can

[Brief description of drawings]

FIG. 1A is a front view showing a state in which a cap seal according to the present invention is attached to a container, and FIG. 1B is a perspective view showing a state in which the cap seal is opened.

FIG. 2A is a front view showing a state where an unsealing tape is adhered to a heat shrink film, and FIG. 2B is a perspective view showing a state where the heat shrink film is formed into a tubular shape.

FIG. 3A is a front view showing a state in which a conventional cap seal is attached to a container, and FIG. 3B is a perspective view showing a state in which the conventional cap seal is opened.

[Explanation of symbols]

 1 Cap Seal Main Body 2 Unsealing Tape 3 Breaking Means 4 Heat Shrink Film 5 Cut Edge

Claims (2)

[Claims] 1. One edge portion (4a) of the heat shrink film (4)
Is formed into a tubular shape by superimposing on the other edge (4b), and one end (2a) of one of the heat shrink film (4) is formed on the inner surface side in the circumferential direction of the heat shrink film (4). The edge (4a) and the other edge (4a
An opening tape (2) attached so as to project from between the overlapping portions of b) is provided, and at the one edge portion (4a) of the heat shrink film (4), the opening tape (2) ) One end
A heat-shrinkable tubular shape characterized in that a plurality of breaking means (3) capable of breaking the heat-shrinkable film (4) are formed in the vicinity of both sides of (2a) in a direction substantially parallel to the unsealing tape (2). body. 2. The heat-shrinkable tube according to claim 1, wherein the breaking means (3) is a fine cutout formed by cutting out at least part of the thickness of the heat-shrinkable film (4). Shape.