JP2000229662A - Packaging container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the unsealability and self-supporting property by laminating a cardboard on an outer surface of a body part of a pillow type bag having a face-to- face thermal adhesion part and upper and lower edge thermal adhesion parts, forming a notch at the position close to the upper edge thermal adhesion part of a side end part of the face-to-face thermal adhesion part, and forming an unsealing line in the whole periphery of the cardboard corresponding to the notch. SOLUTION: After a laminate film 3 having a thermoplastic resin layer on an inner surface is adhered to a face-to-face thermal adhesion part 4 to form a cylinder, upper and lower end parts are folded inward in a V-shape and thermally adhered to form upper and lower edge thermal adhesion parts 5, 6, and to form a sealed gusset pillow type bag. A cardboard 2 is laminated over the whole periphery on the outer surface of the laminate film 3 to form a body part 1 of the bag, two notches 7 are formed at the positions close to the upper edge thermal adhesion part 5 from the center in the vertical direction of a side end of the face-to-face thermal adhesion part 4, and two unsealing lines 8 are formed over the whole periphery corresponding to the notches 7. A product can be protected thereby even when easily-cracked snack food, etc., is packaged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-supporting packaging container having a rigid body and excellent in gas barrier properties and openability.

[0002]

2. Description of the Related Art Conventionally, as a packaging container having a rigid body portion, for example, a bag container made of a synthetic resin having flexibility as described in Japanese Utility Model Application Laid-Open No. 55-123777 is known. There is known a bag-shaped free-standing container having a configuration in which a rigid, folded, cylindrical outer container is bonded to and integrated with the periphery thereof. However, the bag-shaped free-standing container of this configuration is configured such that a flexible synthetic resin bag container is adhered to the inner surface of a two-folded cylindrical outer container and integrated, and is folded in two. Since the cylindrical outer container and the flexible synthetic resin bag container are separately manufactured and then integrated, the manufacturing process of the synthetic resin bag container and the folding process are performed. There is a drawback that a manufacturing process of the cylindrical outer container and a process of integrating them are required, the manufacturing process is extremely complicated, and the production efficiency is not good. Further, there is a drawback that automatic filling and packaging cannot be performed because the film is not manufactured using a continuous roll-shaped film.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a packaging comprising a laminated film and a paperboard, which have a rigid body and therefore have excellent shape retention and self-sustainability, and also have excellent gas barrier properties and openability. To provide containers for use.

[0004]

Means for Solving the Problems The outer surface of the body of a pillow-type bag made of a laminated film having a thermoplastic resin layer on the inner surface and having a thermally bonded portion at the upper and lower edges, and a thermally bonded portion at the upper and lower sides. Corresponds to the notch by laminating paperboard on almost the entire area excluding the edge thermal bonding part and forming an inward notch near the upper edge thermal bonding part of the side edge of the joint palm thermal bonding part It has a configuration in which a continuous opening line is formed over the entire circumference of the paperboard, so that it has a rigid body with laminated paperboard and has excellent shape retention and packs fragile products such as snack foods. And a self-supporting packaging container with excellent display effect. In use, it can be easily opened by tearing the laminated film from the cuts provided in the joint thermal bonding portion, and then tearing the paperboard and the laminated film laminated on the body along the opening line. Further, since a paperboard having an opening line formed thereon is bonded and laminated at a predetermined position on the outer surface thereof, a bag-shaped or automatic filling and packaging can be performed by using a roll-shaped laminated film, thereby enabling efficient production.

[0005] In the above packaging container, a plurality of folding rules parallel to the vertical direction of the container are formed on the paperboard so that the paperboard is bent at a predetermined position to form a polygonal cross section of the body. This allows the body to have a polygonal cross-sectional shape, thus providing a container with excellent design. By providing the folded rules at four predetermined positions, the cross-sectional shape of the trunk can be made square, so that the outer shape can resemble a rectangular parallelepiped paper box.

In the above-mentioned packaging container, the upper and lower edges of the pillow-type bag are thermally bonded in such a manner that the upper and lower edges of the pillow-type bag are folded inward in a V-shape. It is possible to provide a self-supporting rigid packaging container having a circular or polygonal cross section of the edge heat bonding portion which does not protrude outside the trunk portion and a circular or polygonal shape.

In the above-mentioned packaging container, the upper and lower edge thermal bonding portions are thermally bonded with the upper and lower edge portions of the pillow type bag open, and bent at right angles along the top or bottom surface of the container. By bending both ends along the body and bonding the paper to the paperboard of the body, a rigid, self-supporting packaging container having a rectangular parallelepiped shape similar to a paper container can be obtained.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a first embodiment of the present invention, FIG. 2 is a cross-sectional view taken along a line II of FIG. 1, and FIG. 3 is a paperboard at a predetermined position on an outer surface for manufacturing the packaging container of the first embodiment. FIG. 4 is a plan view showing a laminated continuous sheet, FIG. 4 is a perspective view showing a second embodiment of the present invention, FIG. 5 is a cross-sectional view taken along the line II of FIG. 4, and FIG. FIG. 7 is a plan view showing a continuous sheet in which paperboard is laminated at a predetermined position on the outer surface for performing the operation, FIG. 7 is a perspective view showing a third embodiment of the present invention, and FIG.
FIG. 9 is a perspective view showing a state in the course of manufacture of the third embodiment, FIG. 9 is a perspective view showing a fourth embodiment of the present invention, 1, 1 'is a trunk, 2 is a paperboard, 3 is a laminated film, 4 is a joint thermal bonding part, 5 and 5 'are upper thermal bonding parts, 5a is an upper thermal bonding edge,
6, 6 'is the lower end thermal bonding portion, 6a is the lower edge of the lower thermal bonding portion, 7 is the cut, 8 is the opening line, 9 is the inner end of the joint thermal bonding portion, 11 is the ruled line, 12
Denotes a cutting position, 14 denotes a joint thermal bonding area, 15 denotes an upper thermal bonding area, and 16 denotes a lower thermal bonding area.

The first embodiment of the present invention is as shown in FIGS. 1 and 2, and is manufactured using the continuous sheet shown in FIG. As shown in FIG. 1, the shape of the first embodiment is a laminated film 3 having a thermoplastic resin layer on the inner surface.
The upper and lower ends are bent inward in a V-shape at the upper and lower ends and thermally bonded to form an upper edge thermal bonding portion 5 and a lower edge thermal bonding portion 6 for sealing. The gusseted pillow type bag is formed on the outer surface of the laminated film 3 forming the body 1 of the gusseted pillow type bag. The paperboard 2 is laminated over substantially the entire circumference of the body portion 1, and is inwardly provided at predetermined intervals at a position closer to the upper edge thermal bonding portion 5 than at the center in the vertical direction of the side end of the joint palm thermal bonding portion 4. The cutout 7 is formed so as to face the cutout 7 and two continuous opening lines 8 are formed on the paperboard 2 so as to correspond to the cutouts 7.

As shown in FIG. 2, the cross section of the body of the first embodiment has a circular shape having a structure in which a paperboard 2 is laminated on the outer surface of a laminated film 3. The packaging container of the first embodiment is manufactured using the continuous sheet shown in FIG. The continuous sheet shown in FIG. 3 has a configuration in which a rectangular paperboard 2 having an opening line 8 formed at a predetermined position is adhered to the outer surface of the laminated film 3 at regular intervals and laminated. The inner surfaces of the laminated film 3 are joined together and thermally bonded in the thermal bonding regions 14 on both sides of the paperboard 2 of the continuous sheet to form a thermal bonding portion 4 and formed on the paperboard 2 at the side end of the thermal bonding portion 4. A cut 7 is formed at a position corresponding to the opened tear line 8, and the laminated film 3 is thermally bonded at the upper end thermal bonding area 15 on the upper side of the paperboard 2 and the lower thermal bonding area 16 on the lower side thereof. It is produced by forming the portion 5 and the lower edge thermal bonding portion 6. When the inner surfaces of the laminated film 3 are joined together and thermally bonded to form the thermal bonding portion 4 on both sides of the paperboard 2 at the gasoline bonding regions 14 on both sides of the paperboard 2, the paperboard 2 is bent into a curved surface to form a circular body. 1 is formed.

In the case of the packaging container of the first embodiment, the body 1
Is made of a laminated structure of paperboard 2 and laminated film 3 and has rigidity and excellent shape retention, so that it can protect the product even when fragile snack foods and the like are packaged, and become independent. Because it is excellent, the display effect at the store is excellent. At the time of use, the laminated film 3 is grasped by the portion of the laminated film 3 defined by the two cuts 7 provided on the thermal joint portion 4 and pulled in a direction opposite to the direction in which the thermal bonding portion 4 is bent. 3 and tearing one of the laminated films 3 at the inner end 9 of the jointed thermal bonding portion, and then easily tearing the paperboard 2 laminated on the body 1 along the opening line 7 together with the laminated film 3 can do. When the tear strength of the laminated film 3 to be used is strong, the laminated film 3 can be easily broken by forming a fine scar on the laminated film 3 at the portion of the inner end 9 of the thermal bonding portion shown in FIG. . FIG.
Since the contents can be automatically filled and packaged using the continuous sheet shown in (1), a packaging container can be produced very efficiently.

The second embodiment of the present invention is basically the same as that shown in FIGS. 4 and 5, except that the sectional shape of the body 1 'is square as shown in FIG. Has the same configuration as the first embodiment. In the packaging container of the second embodiment, the same effect as that of the first embodiment is obtained, and since the cross-sectional shape of the body portion 1 'is square, a design effect different from that of the first embodiment is obtained. is there. The packaging container of the second embodiment is manufactured using the continuous sheet shown in FIG. The continuous sheet shown in FIG. 6 is different from the continuous sheet shown in FIG. 3 in that four folds 11 are formed on the paperboard 2. Using this continuous sheet, the inner surfaces of the laminated film 3 are joined together and thermally bonded at the two-sided thermal bonding regions 14 on both sides of the paperboard 2 to form the thermal bonding portion 4 of the paperboard 2. The body 1 ′ is bent by the folding rule 11 and has a rectangular cross section. The upper edge thermal bonding portion 5 and the lower edge thermal bonding portion 6 are formed in the same manner as in the first embodiment.

The folding position of the paperboard 2 is not formed at the position where the paperboard 2 is folded as in the continuous sheet shown in FIG. 6 for manufacturing the packaging container according to the second embodiment. By forming a plurality of pieces at narrow intervals, the corners are not bent at right angles as in the second embodiment, and a packaging container having rounded corners is obtained. By forming a plurality of creases in the bent portion as described above, a packaging container having rounded corners and different design properties can be obtained. Further, in the packaging containers of the first and second embodiments, the packaging container which is suspended and displayed by widening the upper and lower widths of the upper edge thermal bonding portion 5 and forming a hole in the upper edge thermal bonding portion 5 is provided. can do.

A third embodiment of the present invention is as shown in FIG. 7, in which the shape of the body 1 'is a square as in the second embodiment. The shape of the bonding portion 6 'is different. A laminated film 3 having a thermoplastic resin layer on the inner surface is formed into a tubular shape at the jointed thermal bonding portion 4 and thermally bonded at both upper and lower ends with both ends opened to form an upper edge thermal bonding portion.
On the outer surface of the laminated film 3 of the body portion 1 'of the flat pillow type bag which is sealed by forming a thermal bonding portion 5' and a lower edge 6 ', a palm joint thermal bonding portion 4, an upper edge thermal bonding portion 5' and a lower edge The paperboard 2 is laminated over substantially the entire surface of the region excluding the thermal bonding portion 6 'over the entire circumference of the body portion 1', and the upper edge thermal bonding portion 5 'and the lower edge thermal bonding portion are laminated.
6 ′ is folded along the top and bottom surfaces of the container, and the upper edge 5a and the lower edge 6a are bent along the body 1 ′ to form the paperboard 2 of the body 1 ′. It is a configuration in which it is bonded. Also in the third embodiment, the rigid body 1 '
It has excellent shape retention and can protect the product even when packaging snack foods that are easy to break, and it has a rectangular parallelepiped shape like a paper box, so it has excellent independence and can be used in stores. The display effect will be excellent. At the time of use, as in the first and second embodiments, the paperboard 2 and the laminated film 3 of the body 1 'can be easily opened by tearing from the cut portion of the thermal bonding portion 4 of the palm.

The third embodiment is manufactured by using a film in which the distance between adjacent paperboards 2 is reduced in the continuous sheet shown in FIG. Paperboard 2 of this continuous sheet
When the inner surfaces of the laminated films 3 in the two sided thermal bonding areas 14 are bonded together and thermally bonded to form the thermal bonding part 4, the paperboard 2 is bent by the four creases 11 to form a square cross section. In this state, the laminated film 3 is opened outward at the upper end thermal bonding area 15 on the upper side of the paperboard 2 and the lower thermal bonding area 16 on the lower side of the paperboard 2 to thermally bond the upper edge. The shape shown in FIG. 8 is obtained by forming the thermal bonding portion 5 'and the lower edge thermal bonding portion 6'. Next, the upper edge thermal bonding portion 5 ′ and the lower edge thermal bonding portion 6 ′ are bent along the top and bottom surfaces of the container, and the upper edge thermal bonding portion edge 5a and the lower thermal bonding portion edge 6a are further connected to the trunk 1 ′. Folded along the paperboard 2 of the body 1 '
By adhering to the surface, a rectangular parallelepiped packaging container can be obtained.

The fourth embodiment is as shown in FIG. 9, in which the cross section of the body 1 'is rectangular and basically the second
This is the same configuration as the embodiment. The outer shape of the body 1 'is substantially cubic and not shown, but differs in that the lower edge thermal bonding portion is bent and bonded along the bottom surface. The packaging container of the fourth embodiment has the same effect as the second embodiment, and a different design effect. In the first to third embodiments, the outer shape is vertically long. However, the body 1, 1 'may be substantially cubic or horizontally long as in the fourth embodiment.

As the laminated film 3, a laminate of a base material layer and a thermoplastic resin layer or a laminate of a base material layer, a gas barrier layer and a thermoplastic resin layer is used. 2 for base material layer
A biaxially stretched film such as axially stretched polyethylene terephthalate, biaxially stretched polypropylene, and biaxially stretched nylon is used, and a thickness of 12 to 20 μ is appropriate. As the thermoplastic resin layer, low-density polyethylene, linear low-density polyethylene, polypropylene, ethylene-vinyl acetate copolymer,
Ethylene-propylene copolymer or the like is used, and the thickness is 2
0 to 40μ is appropriate. 7 ~ for gas barrier layer
An aluminum foil having a thickness of 9 μm, a metal deposited layer of aluminum or the like, or a metal oxide deposited layer of silicon oxide or the like can be used. If the thickness of the thermoplastic resin layer in the laminated film 3 is too large, it is not preferable because the layer becomes difficult to tear.

It is preferable that the laminated film 3 is easily tearable and has excellent moisture proof and gas barrier properties. As a configuration of the laminated film 3, biaxially stretched polyethylene terephthalate / aluminum-deposited layer / low-density polyethylene,
Biaxially stretched polyethylene terephthalate / aluminum foil / low density polyethylene, biaxially stretched polyethylene terephthalate / aluminum deposited layer / polypropylene, biaxially stretched polyethylene terephthalate / aluminum foil / polypropylene, biaxially stretched polypropylene / aluminum deposited layer / polypropylene, biaxially stretched Polypropylene / polypropylene, biaxially stretched polyethylene terephthalate / polypropylene and the like.

[0019]

According to the present invention, the heat-bonded portions of the gasoline joints and the upper and lower edges are bonded to the outer surface of the body of a pillow-type bag which is made of a laminated film having a thermoplastic resin layer on the inner surface and has a jointed thermal bond portion and upper and lower edges. Laminate the paperboard almost all over the area except the part,
An inward cut is formed at a position near the upper end thermal bond at the side edge of the gasket thermal bond, and a continuous opening line is formed over the entire circumference of the paperboard in correspondence with the cut. It has a rigid body with laminated paperboard, has excellent shape retention, and is suitable for packaging snack foods and other fragile products. can do. In use, the laminated film can be easily opened by tearing the laminated film from the cut provided in the joint heat bonding portion and then tearing the paperboard laminated on the body along the opening line. Further, since a paperboard having an opening line formed thereon is bonded and laminated at a predetermined position on the outer surface thereof, a bag-shaped or automatic filling and packaging can be performed by using a roll-shaped laminated film, thereby enabling efficient production. In the packaging container described above, a plurality of folding rules parallel to the vertical direction of the container are formed in order to bend the paperboard on the paperboard at a predetermined position to make the cross-sectional shape of the body part a polygonal shape, Since the cross section of the body can be polygonal, a container having excellent design can be obtained. By providing the folded rules at four predetermined positions, the cross-sectional shape of the trunk can be made square, so that the outer shape can resemble a rectangular parallelepiped paper box. In the packaging container described above, the upper and lower edge thermal bonding portions are thermally bonded in a state where both sides of the pillow type bag are folded inward in a V-shape, so that the upper and lower edge thermal bonding portions have a trunk portion. A self-supporting rigid packaging container that does not protrude outward and has a circular or polygonal cross-section of the body can be provided. In the above-mentioned packaging container, the upper and lower edge thermal bonding portions,
After heat-bonding with the upper and lower ends of the pillow type bag open, they were bent at right angles along the top or bottom surface of the container, and both ends were bent and bonded so as to overlap the paperboard surface of the body. With this configuration, it is possible to provide a self-supporting packaging container having a rectangular parallelepiped shape and rigidity similar to a paper container.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line II of FIG. 1;

FIG. 3 is a plan view showing a continuous sheet in which paperboard is laminated at a predetermined position on an outer surface for manufacturing the packaging container according to the first embodiment.

FIG. 4 is a perspective view showing a second embodiment of the present invention.

FIG. 5 is a sectional view taken along the line II of FIG. 4;

FIG. 6 is a plan view showing a continuous sheet in which paperboard is laminated at a predetermined position on an outer surface for manufacturing a packaging container according to a second embodiment.

FIG. 7 is a perspective view showing a third embodiment of the present invention.

FIG. 8 is a perspective view showing a state in the course of manufacture of the third embodiment.

FIG. 9 is a perspective view showing a fourth embodiment of the present invention.

[Explanation of symbols]

1,1 'Body 11 Folded 2 Paperboard 12 Cut position 3 Laminated film 14 Joint thermal bonding area 4 Joint thermal bonding area 15 Upper thermal bonding area 5, 5' Upper thermal bonding area 16 Lower thermal bonding area 5a Upper thermal bonding area Edge 6, 6 'Lower edge thermal bonding section 6a Lower edge thermal bonding section edge 7 Notch 8 Opening line 9 Inner edge of joint thermal bonding section

Claims (4)

[Claims] 1. A thermal bonding part and an upper and lower edge of a pillow-type bag formed of a laminated film having a thermoplastic resin layer on the inner surface and having a thermal bonding part and a thermal bonding part at the upper and lower edges. A paperboard is laminated on substantially the entire surface excluding the heat bonding portion, and an inward cut is formed at a position near an upper edge thermal bonding portion of a side end portion of the joint thermal bonding portion to correspond to the cut. A packaging container having a configuration in which a continuous opening line is formed over the entire circumference of the paperboard. 2. A container in which a plurality of creases are formed in parallel with the container in a vertical direction so that the paperboard is bent at a predetermined position on the paperboard to form a polygonal cross section of the body. The packaging container according to claim 1, wherein: 3. The upper and lower edge thermal bonding portions are formed by thermally bonding upper and lower ends of the pillow type bag with both side ends inwardly folded in a V-shape. 3. The packaging container according to 1 or 2. 4. The upper and lower edge thermal bonding portions are thermally bonded with the upper and lower ends of the pillow-type bag open, bent at a right angle along the top surface or bottom surface of the container, and furthermore, the both ends are The packaging container according to claim 2, wherein the packaging container is configured to be bent along the trunk and adhered to the paperboard surface of the trunk.