JPH11310230A - Paper container with pouring port - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper container with a pouring port wherein attaching efficiency of the pouring port is good and a volume reduction ratio is excellent at the time of disposal after use. SOLUTION: The paper container including a pouring port attached from an exterior to the vicinity of a blanked hole for pouring via a flange of the pouring port has a bottom of the flange 3 hot-bonded to the vicinity of the blanked hole 2 with a laminate film piece 4 having an aluminum foil between both interposed by means of high frequency sealing. In addition, at least an end of the laminate film piece 4 is extended outside the flange 3 to form a tab 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper container with a spout, which has a good spout mounting efficiency, and which can be reduced in volume upon disposal after use.

[0002]

2. Description of the Related Art Conventionally, when a paper container is formed from a carton blank by a forming and filling machine, a spout in a paper container with a spout is formed around a punched hole formed in a head panel of the carton blank and the spout. The flange is firmly and thermally bonded between the opposing surfaces. The spout can be installed in an external manner in which the carton blank is punched from the outside of the punched hole or an internal manner in which the spout is installed from the inside. The present invention is directed to an external system. Thermal bonding in the case of the external mounting method is based on the thermal bonding between the polyethylene layer on the outermost surface of the carton blank and the bottom of the flange of the spout made of thermoplastic resin. The sonic sealing method is generally used.

[0003]

Generally, the spout is firmly heat-bonded to the head panel of the paper container in order to perform the function of protecting the physical contents as a package and the function of spouting. Cannot be removed. In the case of thermal bonding using hot air, the initial equipment cost can be reduced, but it is difficult to maintain optimum working conditions, and there is a problem that the thermal bonding is difficult to stabilize. In the case of thermal bonding using an ultrasonic seal, not only is the equipment cost of an ultrasonic oscillator, a converter that converts electrical energy into longitudinal vibration, which is mechanical energy, a horn that transmits vibration, etc. increased, but also the equipment itself becomes larger. There's a problem. Also, since the work must be intermittent, it takes 1-2 seconds / cycle,
There is a problem that there is a limit in improving work efficiency. Furthermore, even if the paper container is folded to reduce its volume after use, the spout that is firmly bonded with heat cannot be easily removed, so that the paper container cannot be folded flat. . The present invention has been made in view of such problems, and has a good spout attaching work efficiency, and can be easily removed after use to dispose of the spout, thereby facilitating volume reduction. The purpose is to provide containers.

[0004]

According to the present invention, there is provided a paper container in which a spout is attached to a periphery of a punching hole for pouring from the outside by a flange of the spout. A laminated film piece having an aluminum foil is interposed between the bottom surface of the flange and the peripheral portion of the punched hole so as to form a sheet. Further, at least one end of the laminated film piece is extended outside the flange to form a knob piece.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the drawings. FIG. 1 is a perspective view of a paper container with a spout according to the present invention. Paper container 2 with spout according to the invention
0 is a spout 1 on a predetermined head panel 1 as shown in FIG.
0 is attached. Hereinafter, the term “pouring port” is used in the meaning of a pouring port combination in which a screw cap is combined with a pouring port body composed of a cylindrical body and a flange. The carton shape of the paper container 20 with a spout according to the present invention is arbitrary. That is, the spout 10 is provided at the head of the gable top carton shown in FIG. 1 (a), the flat top carton shown in FIG. 1 (b), and the slant top carton which is a modification of the gable top carton shown in FIG. 1 (c).
Any form can be used as long as it has a panel that can be attached. In the spouted paper container 20 according to the present invention, the spout 10 and the head panel 1 are
The laminated film piece 4 may be bonded to the periphery of the punched hole of the head panel 1 at the stage of the carton blank in advance. In addition, one end of the laminated film piece 4 is extended outward to form the knob piece 4. The knob 4 is used to remove the spout 10 from the head panel 1 after use. Further, it is preferable to provide a folding ruled line K composed of, for example, a Y-shaped ruled line and a horizontal ruled line connecting the intersection thereof horizontally as shown in FIG. 1 on the body side wall of the paper container 20 with a spout.

FIG. 2 is an explanatory view of a spout mounting portion of a paper container with a spout according to the present invention. FIG. 2A is a plan view of a spout attachment portion, and FIG. 2B is a cross-sectional view taken along line xx ′ in FIG. 2A. The spout 10 in the spout-equipped paper container 20 according to the present invention is shown in FIGS. 2 (a) and 2 (b).
As is apparent from the above, the bottom surface of the hollow disk-shaped flange 3 and the outer surface of the periphery of the perforated hole 2 of the head panel 1 facing it are heat-sealed by the high-frequency sealing method with the laminated film piece 4 interposed therebetween. Bonded, and the heat bonding area is H
Indicated by The type of the spout 10 having the flange 3 is arbitrary, and although not shown, a second cylindrical body is provided inside the spout body, and the second cylindrical body is provided with the screw cap 6.
The inner seal 8 is broken by being pushed into the container in conjunction with the opening of the container, or the type that breaks the membrane closing the cylindrical body by pulling the pull ring. You may. Further, a packing material 7 may be used on the back side of the screw cap 6.

FIG. 3 is an explanatory view of a high-frequency seal using a laminated film piece in a paper container with a spout according to the present invention. FIG. 3 is an enlarged view of a portion A in FIG. Carton blank 1 of paper container 20 with spout according to the invention
Is a paperboard having a polyethylene layer on both sides, and its specifications vary depending on the application. For example, the material has the following layer configuration in order from the surface. Low density polyethylene 30μm / bleached kraft paper (285-
400 g / m ² ) / polyethylene 20 μm / silicon oxide-deposited polyethylene terephthalate film 12 μm / low density polyethylene 60 μm On the other hand, the flange 3 of the spout 10 is usually made of medium density or high density polyethylene. Laminated film piece 4 used for paper container 20 with spout according to the present invention
Has the following layer structure from the flange 3 side, that is, from the outside, as shown in FIG. Adhesive layer / Polyethylene / Aluminum foil 7μm / Polyethylene For the inner polyethylene, polyethylene of almost the same grade as the low-density polyethylene used in the carton can be used, but the polyethylene on the front side has a role as a strength layer. The use of medium or high density polyethylene is preferred. Therefore, in order to effectively perform the thermal bonding between the flange 3 and the laminated film piece 4 in a shorter time, it is preferable to provide, for example, an admer-based adhesive layer on the outermost surface of the laminated film piece 4. In place of the polyethylene layer on the front side, an extremely thin film of polyethylene terephthalate, polycarbonate or the like having excellent tensile strength may be used.

The high-frequency seal can be sealed by high-frequency dielectric heating in the case of resins having a high dielectric loss, but together in the case of resins having a low dielectric loss such as polyethylene used in the present invention. High-frequency sealing by high-frequency induction heating, in which adjacent polyethylenes are heated and fused together by the heat generated by the laminated aluminum foil of the conductor, is possible. The temperature of the high-frequency seal by high-frequency induction heating rises rapidly, and the polyethylene (sealant) layers facing each other can be thermally bonded only by passing between the electrodes to which the high-frequency voltage is applied. Therefore, as compared with the case of the conventional ultrasonic seal by intermittent operation, about 1.
The spout 10 can be attached to the carton blank with 5 to 3 times the work efficiency (the number of thermal bonding processes per unit time), and the line speed of the entire molding and filling can be increased.

After the use of the paper container 20 with the spout according to the present invention, the knob 4 protruding outward from the flange 3 of the spout 10 is sandwiched between fingertips as shown by an arrow shown in FIG. When lifted, the heat bonding area H on the knob piece 4 side
Shear stress concentrates on the outer edge of the paperboard, from which delamination of the paperboard occurs, which propagates to the entire heat bonding area H and allows the spout 10 to be peeled from the surface of the head panel 1. Outlet 1
The volume reduction by folding the paper container 20 that has lost zero is
It is superior to the one with the remaining spout and can be folded almost flat. in this case,
It is preferable to provide a folding ruled line K as shown in FIG.

[0010]

According to the present invention, a laminated film piece having an aluminum foil is interposed between the bottom surface of the flange 3 of the spout 10 and the periphery of the punched hole 2 in the head panel 1 of the carton blank facing it. As a result, thermal bonding using a high-frequency seal becomes possible, so that the line speed of molding and filling can be increased, and work efficiency is improved. Also, by extending at least one end of the laminated film piece to the outside of the flange to form the knob piece 4,
After use, the knob 4 allows the spout 10 to be easily removed, which not only increases the volume reduction rate of the paper container, but also allows the plastic and paper to be discarded or recycled.

[Brief description of the drawings]

FIG. 1 is a perspective view of a paper container with a spout according to the present invention.

FIG. 2 is an explanatory view of a spout mounting portion of a paper container with a spout according to the present invention.

FIG. 3 is an explanatory view of a high-frequency seal using a laminated film piece in a paper container with a spout according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Head panel, carton blank 2 Punched hole 3 Flange 4 Laminated film piece, knob piece 5 Cylindrical body 6 Screw cap 7 Packing material 8 Inner seal 10 Spout of paper container with spout according to the present invention 20 Spout according to the present invention Paper container with outlet H Thermal bonding area K Folding rule

Claims (2)

[Claims] 1. A paper container in which a spout is attached to a periphery of a punching hole for pouring from outside by a flange of the spout, wherein a bottom surface of the flange and a periphery of the punching hole are formed of aluminum foil. A paper container with a spout characterized by being thermally bonded by a high-frequency seal with a laminated film piece having the following. 2. The paper container with a spout according to claim 1, wherein at least one end of the laminated film piece is extended outside the flange to form a knob piece.