JP2003020013A - Container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a container for which covering of a neck part formed in a corrugated shape and sealing at its opening part can be done simultaneously. SOLUTION: This container is constituted by a container main body 10 and a heat shrinking sheet 20 attached to this container main body 10. The container main body 10 is constituted by a screw cap 12 for opening or closing a pouring port for stored content, and a neck part 13 having a substantial same diameter as that of this screw cap 12. The neck part 13 has its outer circumferential surface formed in a corrugated shape, and the heat shrinking sheet 20 is wound to cover an outer circumferential surface of the neck part 13 and the screw cap 12. An upper part above the neck part 13 of the heat shrinking sheet 20 is locally heated and shrunk to cause the opening part of the plastic container 1 to be sealed, a part covering the outer circumferential surface of the neck part 13 not heated does not produce any heat shrinkage along the outer circumferential surface of the neck part 13 formed in a corrugated shape, resulting in that the corrugated shape of the neck part 13 which is preferable in view of its design can be surely covered.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container having an outer peripheral surface of a neck portion formed in an uneven shape, and more particularly to a container in which a mouth portion is sealed and the outer peripheral surface of the uneven formed neck portion is inconspicuous.

[0002]

2. Description of the Related Art For example, a plastic container filled with sauce, soy sauce, beverage, liquor or the like is usually formed with an uneven outer peripheral surface of its neck in order to reduce its thickness and weight and to secure its strength. However, the unevenness formed on the neck portion may not be preferable in terms of design.
As shown in (a), a label 60 made of a non-shrinkable plastic sheet that is printed on the entire surface is wrapped around the neck 51 of the container body 50 to hide the neck 51 having an uneven outer peripheral surface. Was doing.

However, such a plastic container for filling the sauce, soy sauce or the like usually has a screw cap 52 for opening and closing the mouth, and as described above, the outer peripheral surface is formed in an uneven shape. Label 60 made of non-shrinkable plastic sheet on the neck portion 51
Since the screw cap 52 can be freely opened in a state where it is displayed in a store simply by winding it, it is desired to seal the mouth of such a plastic container.

[0004]

By the way, in order to seal the mouth portion of the container, a tubular cap seal formed of a heat-shrinkable sheet is fitted into the neck portion from the mouth portion of the container, and the cap seal is heated. A method in which the container is brought into close contact with the mouth of the container by shrinking is generally adopted.

However, when it is attempted to seal the mouth of the above-mentioned plastic container by mounting the cap seal made of such a heat-shrinkable sheet, as shown in FIG.
Cylindrical cap seal 6 inserted from the portion to the neck 51
When heat-shrinking 0a, the cap seal 60a causes heat shrink along the outer peripheral surface of the neck 51 formed in an uneven shape and adheres to the outer peripheral surface of the neck 51.
There is a problem that the characters printed on the portion corresponding to the above are distorted, and the unevenness of the neck portion 51, which is unfavorable in design, becomes noticeable.

Therefore, as shown in FIG. 6, the label 60b formed of a non-shrinkable plastic sheet is
Neck 5 to include the screw cap 52 part
Although a method of winding around the outer peripheral surface of No. 1 is also adopted, there is a problem that the mouth portion of the container cannot be surely sealed by simply winding around the label 60b formed of the non-shrinkable plastic sheet.

Therefore, an object of the present invention is to provide a container capable of simultaneously concealing a neck portion formed in a concavo-convex shape and sealing a mouth portion.

[0008]

Means for Solving the Problems and Effects Thereof In order to solve the above problems, the present invention comprises a lid member for opening and closing the mouth, and a neck portion or a body portion having an uneven outer peripheral surface. In the container, a heat-shrinkable sheet that is primarily heat-shrinkable in the winding direction, in a state of being projected to the upper side of the lid member, the outer peripheral surface over the neck portion or the body portion formed in an uneven shape from the lid member. By covering the neck portion or the neck portion and the body portion so as to cover the neck portion or the body portion so as to avoid the neck portion or the body portion formed in a concavo-convex shape, the heat-shrinkable sheet is partially heat-shrinked to thereby cover the lid. A container characterized in that a portion of the member protruding upward is closely attached to an upper surface of the lid member.

As described above, in this container, the heat-shrinkable sheet is projected to the upper side of the lid member so as to cover the outer peripheral surface thereof from the lid member to the uneven neck or body. The heat-shrinkable sheet is partially heated and shrunk so as to avoid the neck or body formed in an uneven shape by being wound around the neck, or the neck and the body, so that it projects above the lid member. Since the portion is brought into close contact with the upper surface of the lid member, the portion of the heat-shrinkable sheet above the neck portion is brought into close contact with the lid member and is reliably sealed. On the other hand, since heat contraction does not occur in the portion covering the neck portion or the body portion formed in a concavo-convex shape in the heat shrinkable sheet, the neck portion, or the heat shrinkable sheet wrapped around the neck portion and the body portion, By not printing along the outer peripheral surface of the neck or body formed in an uneven shape, by printing the entire surface of the heat-shrinkable sheet, etc., it is possible to surely hide the unevenness of the neck or body that is unfavorable in design. You can

Further, in the container of the invention according to claim 2, wherein the heat-shrinkable sheet is formed of a single expanded polystyrene sheet or a multi-layered sheet including an expanded polystyrene layer, Since the heat-shrinkable sheet itself is opaque and has a certain degree of thickness and rigidity, it is possible to obtain the effect that the irregularities formed on the outer peripheral surface of the neck or the body become even more inconspicuous.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments will be described below with reference to the drawings. FIG. 1 shows a plastic container 1 for filling a sauce. As shown in FIG. 1, the plastic container 1 comprises a container body 10 and a heat-shrinkable sheet 20 mounted on the container body 10. It is configured.

The container body 10 is, as shown in FIG.
It is equipped with a screw cap 12 for opening and closing the spout 11 of the sauce which is the content, and a neck 13 having substantially the same diameter as the screw cap 12, and in order to secure the strength of the container body 10, the outer periphery of the neck 13 The surface is formed in an uneven shape.

The heat-shrinkable sheet 20 is shown in FIG.
As shown in (b), it is formed from a long strip-shaped three-layer sheet with a thickness of 125 μm in which non-foamed polystyrene layers 22 and 23 with a thickness of 12 μm are laminated on both front and back surfaces of a foamed polystyrene layer 21 with a thickness of 101 μm. The width is set to be longer than the height from the lower end of the neck portion 13 of the container body 10 to the upper end of the screw cap 12.

Further, the heat-shrinkable sheet 20 has a structure shown in FIG.
And, as shown in FIG. 3 (a), the screw cap 12 with the spout 11 closed while being attached to the container body 10.
A perforation 20a located between the neck portion 13 and the neck portion 13 is formed. The plastic container 1 having the heat-shrinkable sheet 20 attached thereto has a heat-shrinkable property by gripping the screw cap 12 part and turning it in the opening direction. The sheet 20 is broken at the perforations 20a so that it can be easily opened.

Further, as shown in Table 1, the heat-shrinkable sheet 20 is designed to heat-shrink mainly in the longitudinal direction (MD), and the tensile elongation in the width direction (TD) is suppressed to 5%. Has been. The heat shrinkage rate shown in Table 1 is measured by immersing the test piece collected from the heat shrinkable sheet 20 in silicon oil at a predetermined temperature for 1 minute and then pulling it up.

[0016]

[Table 1]

The heat-shrinkable sheet 20 composed of such a three-layer sheet has a surface on which a polystyrene-based resin containing no foaming agent is superposed when the polystyrene-based resin containing a foaming agent is extruded from a melt extruder. As described above, and then stretched in the machine direction.

The expanded polystyrene layer 21 constituting the heat-shrinkable sheet 20 is expanded by a known chemical foaming agent or physical foaming agent to a foaming ratio of 2 to 10, preferably 2.5 to 10.
It is made of 7-fold expanded general-purpose polystyrene, or a resin whose main component is polystyrene, which is a copolymer of polystyrene with butadiene, acrylonitrile, methacrylic acid, acrylic acid, acrylic acid esters, etc. 50% by weight or more, preferably 70
Contains more than wt%. The non-foamed polystyrene layers 22 and 23 are styrene resins such as polystyrene, styrene / butadiene copolymer, styrene / acrylic acid copolymer, or a mixture of two or more of these styrene resins, or these. It is formed of a mixture of a resin such as polyethylene and ethylene-vinyl acetate copolymer, and preferably contains 50% by weight or more of a styrene component.

In order to form the plastic container 1 configured as described above, first, the heat-shrinkable sheet 20 described above is used.
From the sheet roll wound in a roll shape, after unwinding the heat-shrinkable sheet 20 and cutting it to a predetermined length,
As shown in FIGS. 4A and 4B, the container body 10 is wrapped so as to cover the outer peripheral surfaces of both the neck portion 13 and the screw cap 12.

At this time, the upper end of the heat-shrinkable sheet 20 is
The container main body 10 is wound so as to project above the screw cap 12 and the winding start portion of the heat-shrinkable sheet 20 is removed except for the screw cap 12 as shown in FIG. Is adhered to the outer peripheral surface of the neck portion 13 of the heat-shrinkable sheet 20 with an adhesive agent C1, and as shown in FIG. It is attached to the outer surface of the portion via the adhesive C2.

As the adhesives C1 and C2 used at this time, a heat-sensitive adhesive, a hot-melt adhesive or a liquid paste can be used, and as the adhesive C2, the surface of the heat-shrinkable sheet 20 is dissolved. It is also possible to use an organic solvent that does. When a heat-sensitive adhesive is used, it may be applied to the heat-shrinkable sheet 20 in advance and activated by heating this during sticking. When using a hot-melt adhesive or liquid glue, The heat-shrinkable sheet 20 may be applied immediately before sticking. When the heat-shrinkable sheet 20 is attached to the outer peripheral surface of the neck portion 13 with the adhesive C1, it may be attached to substantially the entire peripheral surface of the neck portion 13.

Subsequently, as shown in FIG. 1C, the neck portion 1 of the heat-shrinkable sheet 20 wrapped around the container body 10.
3 above, that is, by locally heat-shrinking the screw cap 12 portion, the heat-shrinkable sheet 20
Is closely attached to the outer peripheral surface of the screw cap 12, and the upper end of the heat-shrinkable sheet 20 is closely attached to the peripheral edge portion of the upper surface of the screw cap 12, the plastic container 1 as shown in FIG. 1 is completed.

As described above, this plastic container 1
The heat-shrinkable sheet 20 is wound around the neck portion 13 in a state of protruding to the upper side of the screw cap 12 so as to cover the outer peripheral surfaces of both the screw cap 12 and the neck portion 13, and the upper side of the neck portion 13 is locally localized. By heat-shrinking, the screw cap 12 is brought into close contact with the outer peripheral surface and the peripheral edge of the upper surface, so that the mouth of the plastic container 1 is reliably sealed.

On the other hand, since the portion of the heat-shrinkable sheet 20 below the screw cap 12, that is, the portion covering the outer peripheral surface of the neck portion 13 is not heated, that portion is the outer periphery of the neck portion 13 formed in an uneven shape. Does not cause heat shrink along the surface. Therefore, the pattern, characters, etc. printed on the surface of the heat-shrinkable sheet 20 covering the uneven portion of the neck 13 are not distorted, and the neck 13
By the heat-shrinkable sheet 20 wrapped around, the unevenness of the neck portion 13 which is unfavorable in design can be surely hidden.

The heat-shrinkable sheet 20 has a certain thickness in which non-foamed polystyrene layers 22 and 23 are laminated on both sides of an opaque foamed polystyrene layer 21.
Since it is formed of a layered sheet, when it is wound around the neck portion 13 having an uneven outer peripheral surface, most of the unevenness formed on the outer peripheral surface of the neck portion 13 appears on the surface of the heat-shrinkable sheet 20. Absent. Further, since the expanded polystyrene layer 21 forming the heat-shrinkable sheet 20 has appropriate rigidity, when the neck 13 covered with the heat-shrinkable sheet 20 is formed, it is formed on the neck 13. It is possible to obtain an effect that it is difficult to feel a sense of discomfort due to unevenness.

In the above embodiment, the heat-shrinkable sheet 20 is a multi-layer sheet in which the non-foamed polystyrene layers 22 and 23 are laminated on both sides of the foamed polystyrene layer 21, but the present invention is not limited to this. Not what is done,
A heat-shrinkable sheet formed of a foam polystyrene sheet alone may be used. However, by using a multi-layered sheet in which a non-foamed polystyrene layer is laminated on a foamed polystyrene layer, the effect of being able to neatly print and display the trade name and the like can be obtained.

Further, in the above-described embodiment, the thickness 125
Although the heat-shrinkable sheet 20 having a thickness of 100 μm is used, the heat-shrinkable sheet is not limited to this, and a heat-shrinkable sheet having a thickness of about 100 to 500 μm may be used depending on the unevenness of the outer peripheral surface of the neck 13 of the container body 10. You can select and use it.

Further, in the above-mentioned embodiment, the heat-shrinkable sheet 20 in which the non-foamed polystyrene layers 22 and 23 are laminated on the foamed polystyrene layer 21 is used, but the present invention is not limited to this and the non-foamed sheet is used. It is also possible to form the heat-shrinkable sheet with a synthetic resin sheet. However,
When a heat-shrinkable sheet formed of a foamed synthetic resin sheet that is inherently opaque and has a certain thickness and rigidity is used, as described above, the irregularities formed on the outer peripheral surface of the neck 13 are conspicuous. Since the effect of being difficult is obtained, it is desirable that the heat-shrinkable sheet used is formed of a foamed synthetic resin sheet.

Further, in the above-described embodiment, the container body 1
Although the case where the unevenness is formed on the neck portion 13 of No. 0 has been described, the invention is not limited to this and the present invention can be applied to the case where the unevenness is formed on the outer peripheral surface of the body of the container body. it can. However, in that case, the heat-shrinkable sheet is wrapped around the neck and the body so as to cover the outer peripheral surface from the lid member to the body formed in an uneven shape, and the upper side of the neck or the upper side of the body is partially covered. It needs to be heated and shrunk.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a container according to the present invention.

FIG. 2 is an exploded perspective view showing a container body that constitutes the same container.

FIG. 3A is a plan view showing a heat-shrinkable sheet that constitutes the same container, and FIG. 3B is a sectional view taken along line XX of FIG.

4A to 4C are process drawings showing a process of mounting the heat-shrinkable sheet on the container body of the same.

5A is a perspective view showing a conventional plastic container, and FIG. 5B is a perspective view showing another conventional plastic container.

FIG. 6 is a perspective view showing another conventional plastic container.

[Explanation of symbols]

1 plastic container (container) 10 container body 11 spouts 12 screw cap 13 neck 20 heat shrinkable sheet 20a Perforation 21 Expanded polystyrene layer 22, 23 Non-expanded polystyrene layer

Continued front page    F term (reference) 3E033 AA02 BA13 CA02 CA05 DA03                       DB01 EA04                 3E084 AA04 AA12 AA24 AB01 BA03                       BA08 CA01 CC03 DA01 DB03                       DB12 DC03 FA09 FB01 FD09                       GA04 GB04 GB08

Claims (2)

[Claims] 1. A container provided with a lid member for opening and closing a mouth and a neck or a body having an outer peripheral surface formed in an uneven shape, wherein the lid is a heat-shrinkable sheet that shrinks mainly in the winding direction. Wrap around the neck portion or the neck portion and the body portion so as to cover the outer peripheral surface of the lid member protruding from the lid member over the neck portion or the body portion formed in the uneven shape. By partially heat-shrinking the heat-shrinkable sheet so as to avoid the neck portion or the body portion formed in the above, the portion protruding upward of the lid member is brought into close contact with the upper surface of the lid member. A container characterized by that. 2. The container according to claim 1, wherein the heat-shrinkable sheet is formed of a single expanded polystyrene sheet or a multi-layered sheet including an expanded polystyrene layer.