JPH08217051A - Paper cup container - Google Patents

Abstract

PURPOSE: To provide a paper cup container of a simple constitution, of which the material can be comparatively less, and of which the blocking can be prevented from generating by a method wherein a spacer made of paper is attached to be joined to the lower peripheral wall of a side plate to form a step part. CONSTITUTION: For a paper cup container 10 consisting of a side plate 11 and bottom plate 12, a fan shape spacer which is made in advance is joined to the lower inner peripheral wall 13 of the side plate 11, and bonded by a method such as ultrasonic sealing, etc., from the outside of the paper cup container 10 to form a step part 15. As a paper for the spacer, a cup base paper on both surfaces or one surface of which polyethylene is laminated is used. Also, for the paper for the spacer, the part of an end surface 16 is covered with a waterproof tape, or one half of the paper thickness at a cut part of the paper is shaved off, and the remaining part is folded back and bonded to prevent the cut surface from being exposed on the surface as an end surface protecting process. When the paper cup containers 10 are stacked, a bottom-in-curl part 17 sits on the step part 15, and the paper cups are prevented from generating a blocking phenomenon to each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a paper cup container,
More specifically, the present invention relates to a paper cup container having a good feeder suitability in which the force for separating one of the stacked paper cup containers is reduced.

[0002]

2. Description of the Related Art Conventionally, one of stacked paper cup containers is used.
As a paper cup container with a looser force for separating one from the other, for example, Japanese Utility Model Laid-Open No. 60-78730, Japanese Utility Model Publication No.
A number of inventions and inventions have been disclosed, including the invention disclosed in Japanese Unexamined Patent Publication No. 62609. The phenomenon in which the stacked paper cup containers stick to each other and do not fall from the feeder is called a blocking phenomenon.

The former is a composite container formed by inserting an integrally molded container made of synthetic resin into a cup-shaped container made of paper as a base material, wherein the resin inner container has a stepped portion at the bottom of the side wall, And the top of the side wall of the outer container embraces the bead portion of the paper outer container, and the inner container is floatably supported in the outer container so as to provide an air layer between the inner container and the outer container. It is a container that does.

The latter is a simple container formed by molding paper into a cup shape to form a step portion by squeezing a part of the body and winding a foamed styrene paper sheet around the outer periphery of the body. The foamed styrene paper is joined to the outer peripheral portion of the body at a portion other than the stepped portion, and a coated paper is further attached to the surface of the foamed styrene paper. is there.

However, in these inventions and devices, an integrally molded container made of synthetic resin is inserted into the outside of a cup-shaped container made of paper as a main material, or a foamed styrene paper sheet is wound around the outer periphery of the body, Furthermore, a coated paper is stuck on it, and each is a so-called composite container or a complicated container having a shape close to that of a composite container, and requires a relatively large amount of materials.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to eliminate the above-mentioned problems associated with blocking paper cup containers for stacked paper cup containers. It is an object of the present invention to provide a paper cup container for blocking prevention which requires a relatively small amount.

[0007]

In order to achieve the above object in the present invention, first of all, in a first aspect of the invention, there is provided a paper cup container comprising a side plate and a bottom plate, wherein a spacer made of paper is provided on a lower inner peripheral wall of the side plate. The present invention provides a paper cup container, which is closely attached and has a step formed on the inner wall of the lower portion.

A second aspect of the present invention provides the paper cup container according to the first aspect, wherein the end portion of the spacer is end face protected.

[0009]

As described above, according to the present invention, since the paper spacer is closely attached to the lower inner peripheral wall of the side plate to form the stepped portion, when stacking the paper cup containers, The bottom incurl portion does not overlap the stepped portion and the paper cup containers do not cause a blocking phenomenon. Further, since the end face of the spacer is subjected to end face protection processing, the liquid will not soak into the end of the spacer even if a liquid-like container is put therein for a long period of time.

[0010]

The present invention will be described in detail with reference to the following examples.
As shown in FIG. 1, the paper cup container (10) of the present invention comprises a side plate (11) and a bottom plate (12), and a spacer (14) is closely attached to a lower inner peripheral wall (13) of the side plate of the paper cup. Consists of

First, a cup base paper having a basis weight of 210 g / m ² is extruded on one side to a thickness of 20 by an extrusion lamination method.
A side plate paper was prepared by laminating a polyethylene layer of μm.
Also, for forming the bottom plate (12) separately (inside)
A laminated material of polyethylene / cup base paper / polyethylene (outside) constitution was prepared.

Using the laminated material of the side plate and the bottom plate thus manufactured, a conventional paper cup molding machine is used, for example, the mouth outer diameter is 96 mm, the bottom outer diameter is 68 mm, and the height is 107.
A mm paper cup container was made.

Next, for example, by a extrusion lamination method, both sides of a cup base paper (20) having a basis weight of 210 g / m ² and a size degree of 1000 seconds (strong size) are each made to have a thickness of 1
Polyethylene (21) having a thickness of 5 to 45 μm was laminated to prepare a spacer paper. In this case, the polyethylene laminated on the cup base paper may be on one side only, not on both sides. The spacer paper is not limited to the cup base paper, and paper or plastic sheet whose front and back surfaces are coated with a plastic film such as polyethylene and whose end faces are protected may be used. However, it is preferable that the base paper has a strong size because of the problem of water permeability.

The spacer paper thus produced was die-cut into a fan-shaped predetermined size to produce a spacer (14). In this case, the size of the spacer is determined by the taper angle of the paper cup container, the thickness of the cup body, the cup height, etc., but the height of the spacer (14) when closely attached to the inner peripheral wall (13) is: From the bottom of the cup
It is preferably about 10 mm. Further, the thickness of the stepped portion (15) generated by the spacer (14) is 0.3 to
It is preferably 1.0 mm.

The end portion (16) of the spacer (14)
With a waterproof tape, or a method of protecting the end face of a roof paper pack that is distributed as a sake container, that is, scraping about half of the paper thickness of the cut part of the paper and folding back the remaining part and adhering it. By using a method in which the cut surface of the paper is not exposed on the surface (see FIG. 2), the cut surface of the spacer (14) is not exposed on the surface, and the water resistance of the spacer (14) is further improved. Further, instead of the paper spacer, a plastic ring having a trapezoidal cross section may be closely attached to the lower inner peripheral wall of the side plate and used as the spacer (14). As the plastic material at that time, a thermoplastic resin such as polyethylene or polypropylene can be preferably used, but the polyethylene resin is most suitable in consideration of the adhesiveness to the side plate of the paper cup container.

The fan-shaped spacer (1
The paper cup container of the present invention is completed by bringing 4) into close contact with the bottom of the inner peripheral wall surface of the previously prepared paper cup container and adhering it from the outside of the paper cup container by a method such as an ultrasonic sealing method.

In the above embodiment, the spacers are formed in an annular shape in advance and then adhered to the cup body side plates, but the spacers may be adhered to the fan-shaped cup side plates and then molded into a cup.

When the suitability of the paper cup container of the present invention, in which 25 pieces were stacked, was set in the feeder of the instant noodle filling and packaging machine and no suitability for the feeder was found, good results were obtained.

Further, according to the present invention, for example, a heat insulating sheet in which a liner paper is adhered to the outer surface side of a corrugated core paper is wrapped around the outer surface side of the paper cup body and adhered to the heat insulating paper cup container. Even in such a case, it is effective, and the bottom incurl portion of the cup or the liner paper which is the outermost layer does not overlap with the step portion of the spacer to cause the blocking phenomenon.

[0020]

As described above, according to the present invention, a paper spacer is closely attached to the lower inner peripheral wall of the side plate,
Since the step is formed, the stacking suitability is improved, and the filling machine is less likely to stop, and the efficiency of filling the paper cup container with the contents is improved. In addition, since the end face of the spacer is subjected to end face protection processing and is provided with water resistance, it is possible to store a liquid-shaped contained item for a long period of time. Furthermore, since the fan-shaped spacer is only brought into close contact with the paper cup, the amount of materials used can be relatively small.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a cross section showing an embodiment of the present invention.

FIG. 2 is a schematic explanatory view showing an example of an end face protection processing method.

[Explanation of symbols]

 10 ... paper cup container 11 ... side plate 12 ... bottom plate 13 ... inner peripheral wall 14 ... spacer 15 ... step 16 ... end 17 ... bottom incurl 20 ... paper 21 ... polyethylene

Front page continued (72) Inventor Makoto Igarashi 1-5-1 Taito, Taito-ku, Tokyo Toppan Printing Co., Ltd.

Claims (2)

[Claims] 1. A paper cup container comprising a side plate and a bottom plate, wherein a spacer made of paper is closely attached to a lower inner peripheral wall of the side plate, and a step portion is formed on the lower inner peripheral wall. Paper cup container to do. 2. The paper cup container according to claim 1, wherein the end portion of the spacer is end face protected.