JP4615121B2 - Container for liquid - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquid container comprising a paper container main body and a shrink film covering at least a part of the outer surface of the container main body.
[0002]
[Prior art]
In recent years, liquid containers comprising a paper container main body and a shrink film covering at least a part of the outer surface of the container main body have been frequently used to accommodate various beverage products and non-food liquid products. It is becoming. In this type of conventional liquid container, the product name, design, necessary display items, etc. are printed on the outer surface of the container body, and the shrink film adheres to the container body due to static electricity and the contents. In order to prevent mischief against, the entire outer surface of the container main body is covered, or the opening portion is covered.
[0003]
[Problems to be solved by the invention]
Due to increasing environmental awareness in recent years, this type of container has also been collected for reuse of paper pulp and is increasingly used as recycled paper. In order to use paper, it was necessary to perform deinking processing, and there was a problem that the cost for this processing was large.
[0004]
Conventionally, since a container manufacturing company needs to prepare an inventory of blank plates that form a container body for each product, there is a problem that the amount of inventory is large and storage costs increase, and products are sold. If there is no unused blank board left, it cannot be diverted to other products and will be discarded or recycled, but the printed blank board is expensive, There was a problem that economic loss was large.
[0005]
The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a liquid container which is designed to reduce the economic burden and storage costs caused by disposal / recycling.
[0006]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the invention of claim 1 is a liquid container comprising a paper container body and a shrink film covering at least a part of the outer surface of the container body. The outer surface side is plain, a printing layer is applied to the inner surface side of the shrink film, and an OP coat layer is applied to the inner surface side of the printing layer for imparting slipperiness during shrinking. is there.
[0008]
Further, the invention of claim 2, and in the liquid container according to claim 1, wherein the container body is covered by the the infusion outlet shrink film with have a spout, to break the shrink film An opening means for exposing the spout is provided.
[0009]
According to a third aspect of the present invention, in the liquid container according to the second aspect , the opening means is a perforation line engraved in the shrink film.
[0010]
According to a fourth aspect of the present invention, in the liquid container according to the first to third aspects, the shrink film has a thickness of 30 to 100 μm.
[0011]
According to a fifth aspect of the present invention, in the liquid container according to any one of the first to fourth aspects, the shrink film is made of polyethylene terephthalate.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.
1 is a perspective view of a liquid container 1 according to an embodiment of the present invention, FIG. 2 is a perspective view showing a state in which a cylindrical shrink film 3 is covered on a container body 2, and FIG. 3 is a side wall of the liquid container 1. FIG.
[0013]
A liquid container 1 shown in FIG. 1 is for containing sake, and includes a paper container body 2 and a shrink film 3 that covers the outer surface of the container body 2.
[0014]
The container body 2 has a bottomed rectangular tube shape having a gable roof-shaped top wall 4, and a cylindrical spout (not shown) protruding outward is attached to one inclined surface of the top wall 4. A cap 5 having a cylindrical shape is screwed to the spout. The container body 2 is formed of a blank plate punched into a predetermined shape, and this blank plate is formed by laminating, for example, a polyethylene layer, a polyethylene terephthalate layer, an aluminum layer, a polyethylene layer, a paper layer, and a polyethylene layer in order from the inner surface. It is configured.
The outer surface side of the blank plate is not printed and is plain.
[0015]
As shown in FIG. 3, on the inner surface side of the shrink film 3, a printing layer 6 and an OP coat layer 7 for imparting slipperiness during shrinking are sequentially laminated. By providing the OP coat layer 7, the shrink film 3 becomes slippery with respect to the container body 2 during heat shrinkage, and wrinkles are less likely to occur.
[0016]
As a material for the shrink film 3, PET (polyethylene terephthalate) is preferable because it has a rapid thermal shrinkage and a high elastic modulus, and thus has good workability during production. PET is optimal for the present invention because it has the advantage that there is little adhesion of foreign matter to the film surface called “fish eye”, it is easy to print, and the finish is beautiful.
[0017]
In addition, as a uniaxial shrink film, there are polyvinyl chloride (hereinafter referred to as PVC) and expanded polystyrene (hereinafter referred to as OPS), but PVC may generate dioxin during incineration. Since shrinkage occurs over time, there is a problem that it is difficult to use in terms of manufacturing.
[0018]
The thickness of the shrink film 3 is preferably about 30 to 100 μm, more preferably about 50 μm. The thermal shrinkage rate may be about 50 to 60% at 100 ° C. for 10 seconds, but preferably 80% or more.
[0019]
The shrink film 3 is formed in a cylindrical shape before being attached to the container body 2 and contracts in the circumferential direction. The print layer 6 is formed so as to cover the entire four side walls of the container body 2 as shown by hatching in FIGS. 1 and 2 in a state where the shrink film 3 is mounted on the outer surface of the container body 2.
[0020]
On the shrink film 3, perforation lines 8 to 10 for opening the container body 2 are engraved. The perforation lines 8 and 9 are engraved so as to reach the upper part of one side wall of the container body 2 by vertically cutting one inclined surface of the top wall 4 from the upper end of the container body 2 so as to sandwich the cap 5 therebetween. The perforation line 10 is engraved so as to extend in the horizontal direction over the entire circumference of the upper part of the side wall of the container body 2, and intersects the perforation lines 8 and 9.
[0021]
The blank plate forming the container body 2 is formed into a cylindrical shape by bonding the side end portions, and then formed into a predetermined shape by a filling machine and filled with high-temperature contents and cooled in a cooling tank. The surface moisture is removed. And the shrink film 3 formed in the cylinder shape is externally fitted by the side surface of the container main body 2, as shown in FIG.
[0022]
And the container main body 2 with which the shrink film 3 was mounted | worn is passed through a shrink film tunnel, the shrink film 3 shrink | contracts with the heat | fever of the spray sprayed inside, and it adheres to the outer surface of the container main body 2, and shows in FIG. It will be in such a state.
[0023]
To open the liquid container 1, the portion between the perforation lines 8 and 9 at the upper end of the shrink film 3 is pinched and pulled down in the direction of the cap 5. Then, the shrink film 3 is broken along the perforation lines 8 and 9. When the break reaches the perforation line 10, the portion of the shrink film 3 pinched with fingers is pulled in the direction of the perforation line 10. Then, the part enclosed by the perforation lines 8-10 in the shrink film 3 is cut off, and an opening part is formed.
[0024]
And a finger is put in this opening part, the cap 5 is removed, and the content is taken out through a spout. After removing a desired amount of contents, the cap 5 is attached to the spout again. Note that a tear tape may be attached to the shrink film 3 to improve the unsealing property.
[0025]
When the contents disappear, the shrink film 3 is removed from the container body 2 and discarded as general waste. The container body 2 passes through a distributor such as a store or a co-op to a recycling company and becomes recycled paper. At this time, since deinking processing is unnecessary, the recycling cost is lower than before.
[0026]
Moreover, when a product becomes unsold, the blank board which forms the plain container main body 2 can be diverted to other products, so there is less economic loss than before. Furthermore, since the amount of waste is significantly reduced as compared with the prior art, it is environmentally preferable.
[0027]
In addition, this invention is not limited to embodiment mentioned above, A various deformation | transformation can be given to embodiment mentioned above in the range which does not deviate from the summary of this invention.
[0028]
【The invention's effect】
As described above, the liquid container according to the present invention has a plain outer surface of the paper container main body, and the shrink film covering the outer surface of the container main body is printed, so that it is removed when the container main body is recycled. Since there is no need to perform black ink processing, the recycling cost is low. Moreover, since the blank board which forms a plain container main body can be diverted to other products, there is little economical loss. Moreover, it is not necessary to prepare a stock of blank plates for each product. Therefore, the economic burden and storage cost caused by disposal / recycling can be reduced.
[0029]
In addition, the liquid container is provided with a printing layer on the inner surface side of the shrink film, and an OP coat layer for imparting slipperiness at the time of shrinking on the inner surface side of the printing layer. While printing is difficult to peel off, the shrink film becomes slippery with respect to the container body during heat shrinkage, and wrinkles are hardly generated .
[0030]
Moreover, the said container for liquids has favorable opening property by providing the opening means for breaking a shrink film and exposing the spout of a container main body.
[0031]
In addition, the liquid container has a low manufacturing cost because the opening means is a perforation line engraved in the shrink film.
[0032]
Moreover, since the shrink film is made of polyethylene terephthalate, the liquid container has a rapid thermal contraction and a high elastic modulus, so that the workability at the time of manufacture is good. Moreover, there is little adhesion of the foreign material to the film surface, it can be printed easily and can be finished beautifully.
[Brief description of the drawings]
FIG. 1 is a perspective view of a liquid container 1 according to an embodiment of the present invention.
FIG. 2 is a perspective view showing a state in which a cylindrical shrink film 3 is covered on the container body 2. FIG.
FIG. 3 is a schematic cross-sectional view of a side wall of a liquid container 1;
[Explanation of symbols]
1 Liquid container 2 Container body 3 Shrink film

Claims (5)

A liquid container comprising a paper container main body and a shrink film covering at least a part of the outer surface of the container main body, the outer surface side of the container main body being plain, and a printing layer on the inner surface side of the shrink film Applied,
A liquid container, wherein an OP coat layer for imparting slipperiness during shrinking is applied to the inner surface side of the printing layer . The container body has a spout, the spout is covered with the shrink film, and an opening means is provided for breaking the shrink film to expose the spout. The liquid container according to claim 1 . The liquid container according to claim 2 , wherein the opening means is a perforation line engraved in the shrink film. Liquid container according to any one of claims 1 to 3, wherein the thickness of the shrink film is 30 to 100 [mu] m. Liquid container according to any one of claims 1 to 4 wherein said shrink film is characterized in that it consists of polyethylene terephthalate.

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