JPH11278455A - Heat-insulating cup - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tapered heat-insulating cup made of paper with a heat- insulating material wound around a side wall wherein the cup is excellent in adhesion as a cylindrical paper body member on a surface of the heat-insulating layer and the side wall and excellent in re-stackability at the time of filling contents in the heat-insulating cup. SOLUTION: A tapered heat-insulating cup 1 comprises a cup body having a paper side wall 10 and a bottom wall 20 wherein a liner paper surface 10a of a heat-insulating material wound around a surface of the side wall 10 and an internal surface 10b of the side wall of the cup body are approximately smooth, the heat-insulating material has a heat-insulating layer 40, and the heat-insulating layer 40 is made of embossed paper having numerous spot protrusions 40b and spot recesses 40a. A plurality of elongated groove-like recesses 50 by embossing are provided on at least the liner paper surface 10a of the heat-insulating material linearly downwardly from a cup mouth 16 toward the bottom wall 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-insulating cup for storing instant foods and the like, and more particularly to a heat-insulating cup in consideration of re-stackability when filling contents.

[0002]

2. Description of the Related Art Conventionally, a taper cup made of paper or plastic before filling with contents is conventionally filled with the next cup in a stacker of a contents filling machine or a vending machine. It is nested, stacked so that it is not bulky (stacked), and when filling the contents, drop the bottom one cup that has been stacked and take it out (hereinafter referred to as restack) and fill the contents It is well known to do.

However, at the time of filling the above-mentioned contents, a restack failure phenomenon, that is, two cups arrived together or none of them came out depending on the stacking state of the cups, the shape of the cups, the state of the front and back surfaces, and the like. There was something to do.

In particular, in the paper heat-insulating cup according to the present invention, as shown in FIG. 7, when a plurality of cups are stacked, the slipperiness of the innermost layer surface (10b) of the cup side wall and the liner paper surface (10a) is increased. For this reason, the cups were closely adhered to each other, and the refilling property was poor in the content filling machine as described above.

Various measures have been taken to prevent the above restack failure phenomenon. For example, in a plastic cup, as shown in FIG. 8, the bottom wall (20) is formed on the inner surface of the cup side wall (10). ) Protrusions near (30)
Are provided at the same time as the cup body by injection molding or the like, and in the stacker of the content filling machine, the bottom portion (12) of the stacked cup side wall (12) is the projection (30) of the stacked cup.
As it does not fall any further, space is created between the cups to facilitate restacking.

However, in forming a general paper cup (including some paper heat insulating cups), a fan-shaped blank (14) of a paper cup shaped as shown in FIG. Wrap around the mold and seal the edge seal (1
4a) is sealed to form a cylindrical cup body member, which is integrated with the bottom wall by winding or the like around the body member to form a paper cup, or in the case of some heat-insulating cups, the above-described paper cup A heat insulating sheet (such as an embossed paper or a foamed resin sheet) is wound around and adhered to the cylindrical member to form a heat insulating cup. As in the case of the plastic cup, the protrusion (30) is formed simultaneously with the molding. It was difficult to apply. In particular, in the case of a heat insulating cup in which a heat insulating material having an embossed heat insulating layer is wrapped around the body of the cup body, the heat insulating material is stacked in a more tightly adhered state due to the effect of the heat insulating material, and thus has a problem due to restackability.

In the conventional heat-insulating cup formed as described above, a heat-insulating material, in particular, embossed paper having a large number of irregularities excellent in easy incineration and recyclability is used for a tubular body member of a paper cup. At the time of winding and bonding, only the projections are bonded, so that the problem of poor bonding is likely to occur.

A heat-insulating cup using the above-mentioned embossed paper having a large number of uneven portions as a heat-insulating layer is disclosed in JP-A-8-5876.
No. 2 discloses this.

[0009]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, and an object of the present invention is to provide a tapered paper heat insulating cup having an embossed heat insulating layer in the middle. The object of the present invention is to provide a heat-insulating cup excellent in adhesiveness between a heat-insulating layer and a cylindrical paper trunk member, and excellent in re-stackability at the time of filling in a filling machine or the like for filling the heat-insulating cup with contents.

[0010]

In order to achieve the above-mentioned object, the present invention is directed to a first aspect of the present invention, in which a cup body having a paper-made side wall and a paper-made bottom wall is provided outside the side wall. In a tapered heat-insulating cup in which an insulating material having an embossed heat-insulating layer on one side of a liner paper is wound and fixed on the inner surface side, a plurality of elongated groove-shaped recesses by embossing at least the liner paper surface of the heat-insulating material. The heat insulating cup is characterized by being provided with a heat insulating cup.

According to a second aspect of the present invention, the heat-insulating cup according to the first aspect, wherein the elongated groove-shaped concave portion extends linearly from the mouth portion of the side wall toward the bottom wall. It is.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the heat-insulating cup of the present invention has a paper-made side wall (10) and a paper-made bottom wall (20).
As shown in FIG. 2, the innermost layer (10d) of the side wall (10) and the liner paper (10)
c) The surface is substantially smooth, and an embossed heat insulating layer (4
0), and the heat insulating layer (40) has a large number of point-shaped concave portions (40).
a) and a heat insulating material provided outside the side wall (10) in a tapered heat insulating cup (1) as shown in FIG. 1 by using a heat insulating material made of embossed paper having a point-like convex portion (40b). At least on the surface of the liner paper (10a).

Further, the elongated groove-shaped concave portion (50)
Is characterized in that as shown in FIG. 1, it extends linearly in the direction of the bottom wall (20) from the mouth (16) of the side wall.

The position of the elongated groove-shaped concave portion (50) will be described in more detail. As shown in FIG. 3, the center point (O) of the fan-shaped blank (14) is located from the outer peripheral edge (14b) of the fan-shaped blank (14).
Are provided as a plurality of elongated groove-shaped concave portions (50) so as to extend in a straight line toward.

It is preferable that the length of the elongated groove-shaped concave portion (50) is slightly spaced from the outer peripheral edge (14b) of the fan-shaped blank (14) and slightly shorter than the inner peripheral edge (14c). It does not matter if you do not set an interval.

The number of the elongated groove-shaped concave portions (50) is plural, and it is preferable in terms of design from the outside that at least two of the elongated groove-shaped concave portions (50) are symmetrically opposed to each other in the state of a cylindrical cup. Also in the case of three or more, each elongated groove-shaped concave portion (5
It is preferable from the same design that the intervals of 0) are substantially equal.

The method of providing the above-mentioned elongated groove-shaped concave portion (50) is, for example, a heat insulating layer having a large number of dot-shaped concave portions (40a) and dot-shaped convex portions (40b) in a liner paper (10c) as shown in FIG. The heat insulating material to which (40) was adhered was applied to liner paper (10
c) From the side, it is punched out as a fan-shaped blank (14), and at the same time, is formed in the liner paper (10c) by embossing in a male form of the elongated groove-shaped recess (50). Thermal insulation layer (4
The point-like convex part (40b) of 0) is crushed and becomes flat.

The embossed paper as the heat insulating layer (40) having the flat point-like projections (40b) is bonded to the liner paper (10c) having the elongated groove-like recesses (50). As shown in FIG. 5, an adhesive (80) is applied to the fan-shaped blanks (14) from the point-like convex portion (40b) side by a roller coat or the like, and as shown in FIG. 6, the surface of the side wall (10) is formed. Is wound and adhered as a cylindrical body member to form a heat insulating cup.

As described above, when the elongated groove-shaped concave portion (50) is formed by embossing, the apex of the point-shaped convex portion (40b) is crushed and flattened, and the area to which the adhesive (80) is applied becomes large. The adhesion can be strengthened as a cylindrical body member on the surface of the side wall (10).

Further, as described above, by forming the heat insulating cup (1) in which a plurality of elongated groove-shaped concave portions (50) are provided on the surface (10a) of the liner paper of the heat insulating material on the side wall (10), When the heat insulating cups are stacked, a plurality of groove-like spaces are formed in the stacked heat insulating cups (1), and the adhesiveness between the heat insulating cups (1) is reduced.
The restacking property at the time of filling the contents can be improved.

[0021]

Next, the present invention will be described more specifically with reference to examples. Example 1 As shown in FIG. 4, a liner paper (10c) constituting a heat insulating material wound around a heat insulating cup (1) was coated on a coated ball having a basis weight of 230 g / m ² , and a heat insulating layer (40) was formed. The height of the point-like convex part (40b) is 3 mm, and the point-like convex part (4
0b) has a point-like convex part (40b) and a point-like concave part (40b).
The heat insulating material to which the heat insulating layer (40) made of embossed paper having a thickness of about 120 μm, which is a total of 7 pieces / cm ² , is punched out as a fan-shaped blank, and at the same time as shown in FIG. , Fan-shaped blanks (14)
Four elongated groove-shaped recesses (50) each having a width of 4 mm, a length of 50 mm, and a depth of about 800 μm are formed on a straight line from 13 mm below the outer peripheral edge (14b) to the center point (O) of the fan-shaped blank ( 14) on the surface of the liner paper (10c).

Subsequently, as shown in FIG. 5, the adhesive (8
As 0), an EVA-based paste is applied to the point-like convex portion (40b) side of the embossed paper by a roller coating method, and is wound around a surface of the side wall (10) as a cylindrical cup body member as shown in FIG. The heat insulating cup (1) was adhered.

Ten heat-insulating cups (1) obtained as described above are stacked as shown in FIG. 7, and these stacked heat-insulating cups are dropped toward the ground from a height of 45 cm above the ground. The re-stackability test was performed by measuring the strength of separating the lowermost heat-insulating cup (1).
At the same time, as a comparison, a similar test was performed on the heat-insulating cup of Example 1 in which the elongated groove-shaped concave portion (50) was not provided.

As a result of the restackability test, the heat-insulating cup provided with the elongated groove-shaped concave portion (50) in Example 1 weighed 5.9 kg.
The weight of the heat-insulating cup without 0) was 6.5 kg. That is, the re-stackability of the heat insulating cup of the present invention is 0.6
The increase in kg was observed.

Further, a peeling test was conducted between the heat insulating layer (40) and the side wall (10) of the heat insulating cup obtained in Example 1. As a result, delamination occurred in embossed paper as the heat insulating layer (40). , A heat-insulating cup showing strong adhesiveness.

[0026]

As described above, the present invention has the following effects. That is, it has a side wall made of paper and a bottom wall made of paper, and the innermost layer of the side wall and the liner paper surface (10a) of the heat insulating material are substantially smooth, and are wound around the side wall of the cup body having the heat insulating layer in the middle. In the heat-insulating cup, since the heat-insulating layer is made of embossed paper having a number of point-shaped convex portions and concave portions, and a heat-insulating material having a plurality of elongated groove-shaped concave portions formed by embossing at least on the liner paper surface, Stacking the heat-insulating cups creates multiple groove-shaped spaces in the stacked heat-insulating cups, which reduces the adhesion between the heat-insulating cups, thus improving the re-stacking property when filling the contents. it can.

When the elongated groove-shaped concave portion is formed by embossing as described above, the apex of the dot-shaped convex portion of the embossed paper as the heat insulating layer is crushed and flattened, and the area to which the adhesive is applied becomes large. There is an effect that the heat insulating material can be firmly bonded to the surface of the side wall of the main body as the cylindrical body member.

Accordingly, the present invention exerts an excellent practical effect in a filling step or the like when filling instant foods or the like into a heat insulating cup.

[Brief description of the drawings]

FIG. 1 is a perspective view of a heat insulating cup showing an embodiment of the present invention.

FIG. 2 is an explanatory view showing a side wall section of a side wall member of the heat insulating cup showing one embodiment of the present invention.

FIG. 3 is an explanatory view showing fan-shaped blanks of a heat-insulating cup showing one embodiment of the present invention.

FIG. 4 is an explanatory view showing a liner paper and a heat insulating layer of a heat insulating cup according to an embodiment of the present invention in a side cross section.

FIG. 5 is an explanatory view showing a state in which an adhesive is applied to the liner paper of the heat-insulating cup and the dot-shaped protrusions of the heat-insulating layer according to the embodiment of the present invention in a side cross section.

FIG. 6 is a perspective view illustrating a state in which a heat insulating layer is wound around and adhered to the liner paper of the heat insulating cup according to the embodiment of the present invention.

FIG. 7 is a cross-sectional view illustrating an example of a stacked state of plastic cups according to the present invention.

FIG. 8 is a perspective view illustrating a stacked state of cups according to the present invention.

[Explanation of symbols]

 1 Heat insulation cup 10 Side wall 10a Liner paper surface 10b Side wall inner surface 10c Liner paper 10d Innermost layer 12 Side wall bottom 14 Fan sector blanks 14a Edge seal Part 14b ‥‥ Outer rim 14c 周 Inner rim 16 元 Root 20 ‥‥ Bottom wall 30 ‥‥ Protrusion 40 ‥‥ Heat insulation layer 40 a ‥‥ Point-shaped recess 40 b ‥‥ Point-shaped protrusion 50 ‥‥ Slender groove Recess 80 Adhesive O ‥‥ Central point of fan type

Claims (2)

[Claims] 1. A heat insulating material having an embossed heat insulating layer on one surface of a liner paper is fixed to the outside of the side wall of a cup body having a paper side wall and a paper bottom wall by winding the heat insulating layer on the inner surface side. A heat-insulating cup, characterized in that the heat-insulating material has a plurality of elongated groove-shaped concave portions formed by embossing on at least the surface of the liner paper. 2. The device according to claim 1, wherein said elongated groove-shaped concave portion extends linearly from the mouth portion of the side wall toward the bottom wall.
Insulating cup as described.