JP3349124B2 - Paper beverage container and method for producing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a paper beverage container and a paper beverage container .
Relates to a process for the preparation of Yobiso, especially for example, it relates to a method of manufacturing a paper beverage container and its housing the alcohol beverages such as Japanese sake.

[0002]

2. Description of the Related Art A conventional paper beverage container has a printed layer on the surface. This printing layer is formed by directly printing on the surface of the raw paper of a paper container. afterwards,
BACKGROUND ART A three-dimensional container capable of storing a beverage is manufactured by punching a raw paper into a predetermined shape, forming a spout, bending the hinge paper at a hinge line, and bonding a predetermined adhesive portion.

[0003]

However, according to the conventional method of printing a large amount of raw paper continuously and in large quantities on a large-sized printing press, it is not profitable unless a small-type large-lot production is performed.
It was difficult to handle multi-product small-lot production.

[0004] Therefore, a main object of the present invention is to provide a paper beverage container suitable for multi-kind small-lot production and to manufacture the same.
Is to provide a fabrication method .

[0005]

SUMMARY OF THE INVENTION A method for producing a paper beverage container according to the present invention has a structure for storing a beverage therein.
Seal the bottom of the cylindrical body and the side opposite to the bottom of the body.
The head is integrally formed and penetrates a part of the head
A step of preparing a plain paper container body including a spout to be made, a step of preparing a heat-shrinkable film to cover the paper container body, and printing a letter or pattern on the heat-shrinkable film to form a tube. Manufacturing a paper beverage container including a step of forming a heat-shrinkable film on a paper container body , and a step of heating and shrinking the heat-shrinkable film to adhere to the body of the paper container body. the method, the bent portion and the corner portion of the joint between the head of the body of paper container body heat shrunk heat shrinkable
The upper edge of the film is caught and the lower edge is the bottom of the body
With the head of the paper container body and the spout
This is a method for producing a paper beverage container, in which the entire peripheral surface of the body except the bottom is covered with a heat-shrinkable film. According to the present invention, a paper beverage container is completed by enclosing a plain paper container body with a heat-shrinkable film that has been printed in advance. When it is desired to change the design of printing or the like, only the heat-shrinkable film needs to be remade, so that the design of the paper beverage container can be changed easily and inexpensively.

In the method for producing a paper beverage container according to the present invention, the longitudinal length of the body of the paper container body is L1, the longitudinal length of the heat-shrinkable film before shrinkage is L2, When the contraction rate is a, L2> L1 /
It is preferable to satisfy the relationship of (100−a) × 100. In this case, the shrinkable heat-shrinkable film is prevented from being shorter than the longitudinal length of the body of the paper container body. Therefore, when heat shrinking the heat shrinkable film,
The lower edge of the heat-shrinkable film adheres to the periphery of the bottom of the paper container body, and the upper edge straddles the body and the head of the paper container body. Close to the seam. Since the seam between the trunk and the head is bent at a predetermined angle, the heat-shrinkable film after heat shrinkage is hooked on the bent portion of the seam. Therefore, the position of the upper edge portion of the heat-shrinkable film is prevented from shifting from the bent portion of the seam toward the bottom portion during the heat shrinkage, and the body portion of the paper container body is beautifully decorated by printing performed on the main surface in advance. be able to.

Further, in the method for producing a paper beverage container according to the present invention, after the step of heating and shrinking the heat-shrinkable film to bring the heat-shrinkable film into close contact with the paper container body, the heat-shrinkable film is further subjected to It is preferable to include a step of enclosing the entire paper container body with the heat-shrinkable film of No. 2. In this case, the paper container body is double-wrapped with the first heat-shrinkable film and the second heat-shrinkable film. Properties can be further improved.

[0008] According to the present invention, a rectangular cylindrical body with a bottom for storing a beverage therein, a head integrally formed so as to seal the side opposite to the bottom of the body, and a head. a paper container body that includes a spout and which is formed through a portion of the section, NetsuOsamu
Paper that has been shrunk to remove the head, spout, and bottom of the paper container body
A heat-shrinkable film that covers the body of the container body.
The heat-shrinkable heat-shrinkable film is connected to the head of the torso.
The upper edge is caught at the bends and corners of the seam, and the lower edge
Closely adheres to the seam at the bottom of the torso and covers the entire circumference of the torso.
Thus, a paper beverage container having a printed layer on the main surface thereof can be obtained. In this paper beverage container, since the seam between the trunk and the head is bent at a predetermined angle, the heat-shrinkable film after heat shrinkage is caught by the bending of the seam. Therefore, the position of the upper edge portion of the heat-shrinkable film is prevented from being shifted from the seam toward the bottom portion during the heat shrinkage, and the displacement of the print previously applied to the main surface and the distortion of the printed image are prevented. Therefore, the body of the paper container main body can be beautifully decorated by printing performed on the main surface of the heat-shrinkable film. Also, if encapsulated in double paper container body in the first heat-shrinkable film and the second heat-shrinkable film, the durability of the paper beverage container in such during distribution or storage can be enhanced .

The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments of the present invention with reference to the accompanying drawings.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION

FIG. 1 is a perspective view showing an example of a paper beverage container according to the present invention. The paper beverage container 10 includes a paper container body 12. The paper container body 12 includes a bottomed cylindrical body 12a for storing a beverage therein, and a body 12
a includes a head portion 12c integrally formed so as to seal the side opposite to the bottom portion 12b, and a spout 12d formed through a part of the head portion 12c. The spout 12d is the head 12
A circular through-hole is formed in a part of c, and a cylindrical member is fixed to the through-hole. A screw is cut on the outer peripheral wall surface of the cylindrical member, and a cap 13 is screwed to the screw.

FIG. 2 is an exploded view of the paper container main body 12. The paper container main body 12 is mainly made of paper, and has a barrier layer 14 formed on the entire surface to be the inner surface of the container for securely storing alcoholic beverages without allowing the beverage to permeate. The barrier layer 14 is formed by, for example, laminating an aluminum deposition film. Each piece constituting the paper container main body 12 is bent at a hinge line shown by a one-dot broken line in FIG. 2, and a predetermined bonding part (not shown) is bonded with an adhesive, so that it can store an alcoholic beverage or the like. A rectangular cylindrical container is formed.

The head 12c of the paper container body 12 is of a roof type. Each piece forming the head 12c is
Since it is formed by being bent inward from the seam with the trunk portion 12a, the seam between the head portion 12c and the trunk portion 12a becomes a substantially U-shaped bent portion 12e.

The paper beverage container 10 includes a first heat-shrinkable film 18. FIG. 3 shows the first heat-shrinkable film 18.
FIG. As the first heat-shrinkable film 18, a transparent synthetic resin film such as polyvinyl chloride, polyethylene, polyvinylidene chloride, polyester, polypropylene, and polystyrene is used.
On the surface of the first heat-shrinkable film 18, a print layer 20 on which characters, patterns, etc. are printed is formed. The printing layer 20 is the first
May be formed on the entire surface of the heat-shrinkable film 18 or only on a part thereof. The printing layer 20 is formed, for example, by continuously printing a long heat-shrinkable film wound in a roll shape by a rotary printing machine. Thereafter, the first heat-shrinkable film 18 is punched into a rectangular shape as shown in FIG. Then, the one edge portion 18a and the other edge portion 18b are overlapped and bonded or fused to form a cylindrical shape as shown in FIG. Note that the print layer 20 is not limited to being formed on the front surface of the first heat-shrinkable film 18 and may be formed on the back surface.

The upper edge 18 of the first heat-shrinkable film 18
c extends from the trunk 12a to the head 12c across the bent portion 12e. The lower edge 18d is located on the bottom 12 of the body 12a.
It is arranged so as to surround the periphery of b. In this state the first
The heat-shrinkable film 18 is heated and shrunk and adheres to the paper container body 12. Therefore, the first heat-shrinkable film 18 is hooked on the bent portion 12 e of the paper container main body 12. In particular, the paper container body 12 of this embodiment
Has four corner portions 12f on four sides of the bent portion 12e because it is substantially a quadrangular cylindrical shape. As a result, the corners 12f bite into the first heat-shrinkable film 18 firmly, and the upper edge 18c of the first heat-shrinkable film 18 is further reduced to the bottom 12b.
It can be prevented from shifting in the direction, and the body 12a of the paper container body 12 can be beautifully decorated with the printing layer 20 applied to the main surface in advance.

Further, the entirety of the paper container body 12 from above the first heat-shrinkable film 18 is
2 encapsulated. As the second heat-shrinkable film 22, the same material as the first heat-shrinkable film 18 can be used. Therefore, this paper beverage container 1
0 has a sectional structure as shown in FIG. The printing layer 20
The transparent second heat-shrinkable film 22 can be transmitted through and seen from the outside.

Next, a method for producing a paper beverage container according to the present invention will be described mainly with reference to FIGS. In the method of manufacturing the paper beverage container 10 of this embodiment, first, the plain paper container body 12 described above is prepared by a known method. The paper container body 12 is formed by punching a long raw paper into a shape as shown in FIG. 2, for example.
It is assembled by bending along a dashed line and bonding a predetermined portion.

Next, a tubular first heat-shrinkable film 18 on which characters, designs, etc. are printed is prepared. A printing layer 20 is formed on the surface of the first heat-shrinkable film 18 in advance. Then, one edge portion 18a and the other edge portion 18b of the first heat-shrinkable film 18 punched in a rectangular shape as shown in FIG. 3 are overlapped and adhered or fused, as shown in FIG. It is formed in a cylindrical shape. This first
The height L2 of the heat-shrinkable film 18 before heat-shrinkage is the height L1 of the body 12a of the paper container body 12 (from the seam between the bottom 12b of the body 12a and the seam between the body 12a and the head 12c). Is formed to have the following relationship. L2> L1 / (100−a) × 100 formula where a is a heat shrinkage rate of the material of the first heat shrinkable film 18. More specifically, for example, L1 is 255 m
m, and when the heat shrinkage rate of the first heat shrinkable film 18 is 4% or more, the first heat shrinkable film 18 before shrinkage
Is formed to have a length of 265.6 mm or more.

Next, as shown in FIG.
2 is covered with a first heat-shrinkable film 18. This step is performed using a cylindrical or cylindrical mandrel.
The heat-shrinkable film 18 is opened.

Next, the paper container main body 12 covered with the first heat-shrinkable film 18 is conveyed into the shrink tunnel T and heated, thereby shrinking the heat-shrinkable film 18 so as to shrink the paper container main body. 12 In this manner, the entire peripheral surface from the bent portion 12e of the joint between the body portion 12a and the head portion 12c of the paper container body 12 to the seam between the bottom portion 12b of the body portion 12a is covered with the first heat-shrinkable film 18. In this case, since the height L1 of the paper container body 12 and the longitudinal length L2 of the first heat-shrinkable film 18 have the above-described relationship, the first heat-shrinkable film 18
Bent portion 12e and four corner portions 12 of paper container body 12
The upper edge 18c of the first heat-shrinkable film 18 is prevented from being displaced in the direction of the bottom 12b.

Next, as shown in FIG.
Is prepared. The second heat-shrinkable film 22 is formed in the same manner as the first heat-shrinkable film 18, except that in this embodiment, the second heat-shrinkable film 22 is formed in a bottomed bag shape. The second heat-shrinkable film 22 is
The paper beverage container 10 of this embodiment is completed by covering the heat-shrinkable film 18 from above and dipping the shrink tunnel T.

According to this embodiment, the paper beverage container 10 is completed by enclosing the plain paper container body 12 with the first heat-shrinkable film 18 printed in advance. When it is desired to change the design of printing or the like, only the first heat-shrinkable film 18 needs to be recreated, so that the design of the paper beverage container 10 can be changed easily and inexpensively.

Further, in the paper beverage container 10 of this embodiment, the bent portion 12e of the joint between the body 12a and the head 12c is provided.
Is bent at a predetermined angle and has four corners 12f, so that the first heat-shrinkable film 18 after heat shrinkage is hooked on the bent part 12e and the corner 12f. Therefore, the upper edge portion 1 of the first heat-shrinkable film 18
The position of 8c is prevented from shifting from the bent portion 12e in the direction of the bottom portion 12b at the time of thermal contraction, and the displacement of the print layer 20 previously applied to the main surface and the distortion of the printed image are prevented. Further, since the paper container main body 12 is double-wrapped by the first heat-shrinkable film 18 and the second heat-shrinkable film 22, the paper beverage container 10 during distribution or storage can be used. The durability is improved.

[0023]

According to the present invention, a beverage container is completed by enclosing a plain paper container body with a printed heat-shrinkable film. Various types and brands of beverage containers can be used in a unified manner. If you want to change the design or brand of printing on the surface of the container, you do not need to recreate the entire container, you can make a plain paper container body,
Only the relatively inexpensive heat-shrinkable film needs to be changed.
Therefore, the beverage maker has no unnecessary inventory,
It is easy to handle high-mix low-volume production.

[Brief description of the drawings]

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

FIG. 2 is a development view showing an example of a paper container main body used for the paper beverage container shown in FIG.

FIG. 3 is an exploded view showing an example of a heat-shrinkable film used in the paper beverage container shown in FIG.

FIG. 4 is a perspective view showing a state where the heat-shrinkable film shown in FIG. 3 is formed into a cylindrical shape.

FIG. 5 is an illustrative view showing a step of a part of a step of manufacturing the paper beverage container shown in FIG. 1;

FIG. 6 is an illustrative view showing a step following the manufacturing step shown in FIG. 5;

FIG. 7 is an illustrative view showing, on an enlarged scale, a cross section of a main part of the completed paper beverage container after the step shown in FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Paper drink container 12 Paper container main body 12a Trunk 12b Bottom 12c Head 12d Spout 12e Bend 12f, 12g Corner 13 Cap 14 Barrier layer 18 First heat-shrinkable film 18a One edge 18b Other edge Part 18c Upper edge part 18d Lower edge part 20 Printing layer 22 Second heat-shrinkable film

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B65D 1/09 B41M 1/30 B65D 5/40 B65D 85/72

Claims (6)

(57) [Claims] 1. A rectangular tube with a bottom for storing a beverage therein.
Of the torso and the bottom of the torso so as to seal the opposite side.
A head formed on the body and formed through a part of the head
A step of preparing a plain paper container body including a spout to be prepared, a step of preparing a heat-shrinkable film to cover the paper-container body, and printing characters and patterns on the heat-shrinkable film A paper comprising: a step of forming a tubular shape; a step of covering the heat-shrinkable film on the paper container body; and a step of heating and shrinking the heat-shrinkable film to adhere to the body of the paper container body. a method of manufacturing a manufacturing a beverage container, the bent portion and the corner portion of the joint between the head of the body portion of the paper container body, and catching the top edge of the heat-shrinkable film thermally shrinkable The lower edge is the seam with the bottom of the body
And close the head and the spout and bottom of the paper container body.
Excluding the entire peripheral surface of the trunk with the heat-shrinkable film,
A method for producing a paper beverage container. 2. The paper beverage container according to claim 1, wherein the length of the body is L1.
The longitudinal length of the heat-shrinkable film before shrinkage is defined as L2, and the shrinkage rate of the heat-shrinkable film is defined as a, wherein the relationship of L2> L1 / (100−a) × 100 is satisfied. A method for producing the paper beverage container according to the above. 3. After the step of heating and shrinking the heat-shrinkable film to bring the heat-shrinkable film into close contact with the paper container main body, further, a second heat-shrinkable film is formed on the heat-shrinkable film from above the heat-shrinkable film. The method for producing a paper beverage container according to claim 1 or 2, comprising a step of enclosing the whole body. 4. A rectangular cylindrical body with a bottom for storing a beverage therein, a head integrally formed so as to seal a side opposite to a bottom of the body, and a head of the head. A paper container body including a spout formed to penetrate a part, and thermally contracted ,
Paper container excluding the head and the spout and bottom of the paper container body
A heat-shrinkable film enclosing the body of the container body , wherein the heat-shrinkable heat-shrinkable film is caught at an upper edge portion at a bent portion and a corner of a seam with the head of the body, A paper beverage container having a printing layer on a main surface having a lower edge in close contact with a seam with the bottom of the trunk and enclosing the entire peripheral surface of the trunk. Wherein said heat-shrinkable film comprises a first heat shrinkable film and a second heat-shrinkable film, the first heat shrinkable film, and the head of the body portion The upper edge portion is caught on the bent portion and the corner portion of the seam, the lower edge portion is in close contact with the periphery of the bottom of the body portion, and has a printing layer on the main surface covering the entire peripheral surface of the body portion, The paper beverage container according to claim 4, wherein the second heat-shrinkable film is formed so as to cover the entirety of the paper container body from above the first heat-shrinkable film. 6. The paper beverage container according to claim 6, wherein the length of the body is L1.
The longitudinal length of the heat-shrinkable film before shrinkage is defined as L2, and the shrinkage ratio of the heat-shrinkable film is defined as a, wherein the relationship of L2> L1 / (100−a) × 100 is satisfied. A paper beverage container according to claim 5.