JPH0858756A - Container and sleeve component for said container - Google Patents

Abstract

PURPOSE: To increase the strength of a container made of thin plastic to make it easy to hold, and reduce the usage of plastics by a method wherein the container main body is covered with a paper sleeve, ends of the sleeve are bonded together with a shrink film in between and the shrink film is heat-shrunk. CONSTITUTION: A container main body 2 made of thin plastic is covered with a tubular paper sleeve 3, and the side edges off the sleeve 3 are bonded together with a shrink film 5 in between. Then, the shrink film 5 is heat-shrunk to hold the sleeve 3 around the circumferential face of the container main body 2. Thereby, a container 1 becomes stable in shape and easy to hold as the circumference of the container main body 2 is reinforced by the sleeve 3, and the process is simplified and the usage of plastic is reduced as the container main body 2 can be reinforced by heat-shrinking process alone.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage container in which a plastic container body is covered with a paper sleeve, and the thickness of the plastic container is reduced.

[0002]

2. Description of the Related Art Conventionally, it is known that a plastic bottle commercially available as a storage container has a paper label or a shrink film attached to its periphery.

However, recently, from the viewpoint of environmental protection, it has been proposed to reduce the amount of plastics used, and as an attempt to reduce the amount of plastics, research has been carried out to reduce the thickness of plastic bottles. Further, in the case of a thin plastic bottle, there is a disadvantage that it is easily deformed and difficult to hold just by pasting a paper label or a shrink film.

Therefore, researches and developments have been made on a plastic bottle in which the body portion is made thin and the circumference is covered with a paper sleeve, or a plastic container is housed in a box-shaped pack.

For example, in Europe, there is a plastic bottle having a square cross section covered with a paper sleeve.
In this plastic bottle, a recess is formed on the ridge of the box shape, and a projection protruding inside the cylinder is formed on the ridge of the paper sleeve. The paper sleeve and the plastic bottle are fitted together, and By fitting the recess of the plastic bottle and the projection of the paper sleeve, both are fixed.

For fixing the paper sleeve to the plastic bottle, a fitting groove extending laterally is formed on the peripheral surface of the body of the plastic bottle, the upper end of the paper sleeve is bent inside the cylinder, and the paper groove is inserted into the fitting groove. In some cases, the folded end of the sleeve is fitted to fix the paper sleeve and the plastic bottle.

[0007]

However, in such a conventional storage container, when a method of forming a recess or a fitting groove in a plastic bottle is adopted, since polyethylene terephthalate is relatively hard, it is formed by blow molding of a heating preform. In this case, it is difficult to form a recess having a small area and a large depth on the peripheral surface of the plastic bottle, and there is a problem that the sleeve and the plastic bottle are difficult to adhere to each other.

Therefore, it is conceivable that the paper sleeve and the plastic bottle may be glued and bonded together, or hot-melt bonding may be performed, without forming a recess for fixing the sleeve on the peripheral surface of the plastic bottle. However, when the paper sleeve and the plastic bottle are glued and bonded, there is a problem in that the peeling process is difficult because the glue and the paper piece remain attached during recycling.

Further, in the case of hot melt, since an adhesive or a thermoplastic resin must be provided inside the paper sleeve, the manufacturing cost of the paper sleeve becomes high, and the heater and temperature for hot melt are increased. Since a control device etc. is required, there is a problem that the equipment becomes large-scale.

The present invention focuses on such a problem, and makes a container body made of thin-walled plastic to have a certain hardness by means of a paper sleeve, thereby making it easy to hold the entire container and at the same time making the sleeve and the container. It is an object of the present invention to provide a storage container that can reduce the manufacturing time by not using an adhesive for fixing to the main body, and can be applied not only to a circular cross section but also to a rectangular cross section or the like.

[0011]

In order to solve the above-mentioned problems, a storage container according to claim 1 of the present invention is a storage container in which a container body made of thin plastic is held and covered in a cylindrical paper sleeve. In the container, the circumferential ends of the paper portion of the sleeve are adhered to each other with a shrink film interposed, and the shrink film is heat-shrinked to hold the peripheral surface of the container body by the sleeve. .

The storage container of claim 2 of the present invention is the same as that of claim 1.
In the storage container described above, the container body has a rectangular tube shape, and one or more shrink films are provided at a portion corresponding to a ridge line portion of a peripheral wall portion of the rectangular tube-shaped container body.

The sleeve structure for a storage container according to claim 3 of the present invention is formed in a tubular shape to form a paper sleeve for covering the peripheral surface portion of the container body made of thin plastic, and is as large as the container body. A sleeve structure to be used after being cut into pieces, in which one or more shrink films extending in the longitudinal direction of the tube are interposed and a long and narrow cardboard is bonded in a tube shape, and the cardboard and the shrink film are tube-shaped. It is characterized by being flatly folded.

[0014]

According to the storage container of claim 1 of the present invention, since the paper sleeve firmly holds the container body by heat shrinkage of the shrink film, the workability is good, the amount of plastic used is small, and the cardboard By using, it is possible to maintain a stable shape even in a thin-walled container body that is easily deformed, and it is possible to increase the strength of the entire storage container and make it easier to hold.

According to the storage container of claim 2 of the present invention, in addition to the function of the storage container of claim 1, the ridge line portion of the container body of the box-shaped container is stronger than the flat surface portion, and the paper sleeve Since both ends are strongly pulled due to heat shrinkage of the shrink film, the entire storage container is not easily deformed even if the shrink film is located at the ridge. Further, since the flat surface portion of the container body is supported by the paper sleeve and the shape of the entire storage container is stably maintained, it is easy to hold.

According to the sleeve structure for a storage container of claim 3 of the present invention, the sleeve structure is cut to a desired length with respect to the length of the container body, and the container body is placed inside the sleeve structure. When the container body is positioned and the container body is filled with liquid or gas to heat-shrink the sleeve structure, the periphery of the container body is reinforced by the sleeve structure, so that the storage container has a stable shape and is easy to hold. ， Reinforcement of the container body is completed only by heat shrinkage, so work is easy. Also, since shrink film is only partially used, the amount of plastic used is small.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A storage container according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a storage container according to the first embodiment of the present invention. The storage container 1 comprises a container body 2 and a paper sleeve 3. Of course, the container body 2 is sealed by a cap (not shown). The container body 2 is made of thin plastic, and is made of polyethylene (P
E), made of plastic such as polyethylene terephthalate (PET), and formed by direct blow molding or stretch blow molding. In this embodiment, the body 2a of the container body 2 is formed thinner than the mouth 2b. As shown in FIG. 2, the body portion 2a includes a step portion 2 extending in the circumferential direction.
Three c are formed, and the container body 2 itself is reinforced.

The sleeve 3 has a cross-sectional shape extending in a tubular shape, and is composed of a cardboard portion 4 having a cylindrical shape and a shrink film 5 connecting end portions 4a and 4b in the circumferential direction of the cardboard portion 4. The cardboard 4 may be made of paperboard so as to easily maintain a strong shape. When wound in a roll, use a type with a basis weight of 50 g / m ² or less that is less likely to wrinkle.

The shrink film 5 extends in the longitudinal direction of the sleeve 3 and is adhered to the end portions 4a and 4b of the thick paper portion 4. The shrink film 5 is made of a material such as polyvinyl chloride (PVC) or polyethylene terephthalate (PE) that has been prestressed by uniaxial stretching, biaxial stretching or multiaxial stretching so as to shrink when heated.
It is formed of a plastic film made of T), polystyrene (PS) or the like. The thickness of the shrink film 5 is 20 μm to 200 μm.

According to the storage container 1 shown in FIG.
Both ends 4a and 4b of the cardboard 4 are connected by a shrink film 5, and the shrinkage of the shrink film 5 by heat shrinks the thick paper part 4
Since the container body 2 is clamped by the container body 2, even if the body portion 2 of the container body 2 is thin and easily deformed, the rigidity of the cardboard portion 3 makes the storage container 1 itself difficult to deform and easy to hold.

Particularly, in this embodiment, the mouth portion 2 of the body portion 2a is
The periphery of the connection part with the b side and the bottom part extends in the horizontal direction, and in addition to having strength against the deformation force from the side, the sleeve 3 has a portion from the top to the bottom of the body part 2a. Since they are held in close contact with each other, the strength of the storage container 1 as a whole is improved, and it is difficult for it to deform. After the liquid as the content is poured, the container body 1 can be separated from the sleeve 3 by deforming the container body 1 from the outside.

FIG. 3 shows a storage container 1 according to the second embodiment of the present invention.
Indicates 0. The storage container 10 includes a plastic container body 11 formed by blow molding and a sleeve 12. Upper part 11a of the body 11 of the container body 11
Is thin, and the lower part 11 of the body 11 of the container body 11 is
The b is formed so as to bulge slightly outside the upper portion 11a. The sleeve 12 is formed by connecting both ends of a cardboard 12a with a shrink film 13. The shrink film 13 is made of the same material as the shrink film 5 of the first embodiment, and shrinks by heating to shrink the upper part 11 of the body 11.
A is tightened.

According to the storage container 10 of this embodiment, the first
As with the embodiment, the amount of plastic used in the container body 11 can be reduced, and since only the upper portion 11a of the body portion 11 is covered with the sleeve 12, if the lower portion 11b of the body portion 11 is made transparent, There is an advantage that it is easy to check the amount of liquid.

FIG. 4 shows a first embodiment of the sleeve structure of the present invention.

This sleeve structure 20 is formed by connecting both ends of a cardboard portion 21 which can be expanded in a tubular shape with a shrink film 22 made of the same material as the shrink film 5 of FIG. The thick paper portion 21 and the shrink film 22 are continuous in the longitudinal direction and are wound in a roll shape. The sleeve structure 20 is unwound and separated from the container body 2 or 11 of FIG.

FIG. 5 shows a second embodiment of the sleeve structure, and this sleeve structure 30 is wound in a roll shape like the sleeve structure 20 of FIG. 4, and can be spread in a rectangular cross section. The end portions forming the ridge line portion 31a of the thick paper portion 31 spread in a rectangular cross section are connected by the shrink film 32a. The shrink film 32a is adhered to the outside of the cylinder. Of course, the sleeve structure 30 may be expanded in a circular shape or an elliptical shape according to the sectional shape of the container body.

FIG. 6 shows a modified example of the sleeve structure shown in FIG. 5. This sleeve structure 30 'has a cardboard portion 31.
Shrink film 32b is adhered to both ends of
As a result, the thick paper portion 31 is formed in a tubular shape. The shrink film 32b is bonded so as to be located inside the tubular body.

FIG. 7 shows a sleeve structure 33 according to the third embodiment.
A plastic film 35 is adhered to one side of No. 4, and a shrink film 36a is adhered to the plastic film 35 by heat sealing. This Figure 7
The sleeve structure 33 is wound in a roll shape as shown in FIG. 4, and can be expanded according to the sectional shape of the container body such as rectangular, circular or elliptical. In this sleeve structure 33, the plastic film 35 is located outside the cylinder, and the shrink film 36
Although a is adhered from the outside of the cylinder,
As shown in the sleeve structure 33 ', the plastic film 35' may be positioned inside the tubular body and the shrink film 36b may be adhered to the inside of the tubular body by heat sealing.

FIG. 9 shows a sleeve structure 37 of the fourth embodiment. This sleeve structure 37 is wound in a roll shape like the sleeve structure shown in FIG. 4, and a pair of shrink film 39 in which the ends of a pair of opposing cardboard parts 38, 38 are opposed to each other. , 39 are bonded together. Of course, the shrink films 39, 39 may be positioned inside the tubular body to connect the cardboard portions 38, 38 to each other as in the sleeve constructions 30 ', 33' of FIGS.

According to this sleeve structure 37, since there are a pair of shrink films 39, 39, it is easy to fold it, and it is easy to wind it in a roll shape.
It becomes difficult for wrinkles to be formed in 8, 38. Also, the thick paper part 3
Since 8 and 38 are connected by the shrink films 39 and 39, when the sleeve structure 37 is cut into a desired length and fitted to the container body having a box-shaped cross section, the close contact with the peripheral wall portion of the container body is performed. As a result, the strength of the entire storage container can be expected to improve, and the inside can be easily seen, further improving ease of use.

[0032]

According to the storage container of claim 1 of the present invention,
Workability is good because the paper sleeve holds the container body firmly due to the shrinkage of the shrink film.
In addition to reducing the amount of plastic used, the use of thick paper can maintain a stable shape even in a thin-walled container body that is easily deformed, and the strength of the entire storage container can be increased to facilitate holding.

According to the storage container of claim 2 of the present invention, in addition to the function of the storage container of claim 1, the ridge line portion of the container body of the box-shaped container is stronger than the flat surface portion, and the paper sleeve Since both ends are strongly pulled due to heat shrinkage of the shrink film, the entire storage container is not easily deformed even if the shrink film is located at the ridge. Further, since the flat surface portion of the container body is supported by the paper sleeve and the shape of the entire storage container is stably maintained, it is easy to hold.

According to the sleeve structure for a storage container of claim 3 of the present invention, since it is tubular and is folded, it can be wound in a roll shape. Cut the sleeve structure to a desired length with respect to the length of the container body, position the container body inside the sleeve structure, and fill the container body with liquid or gas to heat-shrink the sleeve structure. Then, the periphery of the container body is held and reinforced by the sleeve structure, so that the storage container has a stable shape and is easy to hold. Moreover, since the reinforcement of the container body is completed only by heat shrinkage, the work is easy. Furthermore, since shrink film is only partially used, the amount of plastic used is small. When there are two or more shrink films,
Folding of the sleeve structure is easy.

[Brief description of drawings]

FIG. 1 is a perspective view of a storage container according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a container body of the storage container shown in FIG.

FIG. 3 is a perspective view of a storage container according to a second embodiment of the present invention.

FIG. 4 is a perspective view of the sleeve structure according to the first embodiment of the present invention wound in a roll shape.

FIG. 5 is a sectional view of a sleeve structure according to a second embodiment of the present invention.

FIG. 6 is a cross-sectional view of the sleeve structure of the modified example of FIG.

FIG. 7 is a sectional view of a sleeve structure according to a third embodiment of the present invention.

FIG. 8 is a cross-sectional view of the sleeve structure of the modified example of FIG.

FIG. 9 is a sectional view of a sleeve structure according to a fourth embodiment of the present invention.

[Explanation of symbols]

 1 Storage Container 2 Container Body 3 Sleeve 4 Cardboard Section 5 Shrink Film 10 Storage Container 11 Container Body 12 Sleeve 13 Shrink Film 20 Sleeve Constituent 21 Cardboard Section 22 Shrink Film

Claims (3)

[Claims] 1. A storage container in which a container body made of thin-walled plastic is held and covered in a cylindrical paper sleeve, and circumferential ends of the paper portion of the sleeve are bonded with a shrink film interposed therebetween. A storage container characterized in that the shrink film is heat-shrinked and the peripheral surface of the container main body is held by the sleeve. 2. The storage container according to claim 1, wherein the container body is in the shape of a rectangular tube, and the shrink film is provided in one or more portions in contact with the ridge line portion of the peripheral wall of the container body in the rectangular tube shape. A storage container characterized by that. 3. A sleeve structure which is formed in a tubular shape to form a paper sleeve for covering a peripheral surface portion of a container body made of thin plastic, and which is used by cutting into a size of a container body. A storage container characterized in that a long and narrow cardboard is bonded in a tubular shape with one or more shrink films extending in the longitudinal direction of the tube interposed, and the tubular body of the cardboard and the shrink film is flatly folded. Sleeve composition.