JP3065505U - Double structure insulated paper cup - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat insulating paper cup having a double structure excellent in heat insulating performance and printing characteristics of a container surface. SOLUTION: This double-layer paper cup has a substantially truncated cone-shaped paper cup body having an outward curl portion at an upper opening edge, and a substantially truncated cone-shaped exterior material covering the outside of the paper cup body. The edge of the upper opening of the paper cup is folded inward, the leading end thereof is brought into contact with the outside of the paper cup body, the contact portion is adhered to the paper cup body, and a part of the exterior material folded inward is folded into the paper cup body. Abutting against the outward curl portion of the upper opening edge. Further, an inward curl portion is provided at a lower opening edge of the exterior material so that a part of the inward curl portion abuts on the outside of the paper cup main body, and a distance between the paper cup main body and the exterior material is from the top to the bottom of the paper cup. It is formed so as to have substantially the same interval.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a technique for providing heat insulation to use a paper cup-shaped container, mainly a tapered paper cup, as a container for instant noodles and the like. In particular, the present invention relates to a paper cup capable of keeping the surface of the container in a temperature range that can be sufficiently tolerated by a consumer holding the surface of the container when the cup is filled with hot water for eating.

[0002]

[Prior art]

 As the cup-shaped container used for instant noodles and instant miso soup, a styrofoam container and a PS molded container have been widely used in view of heat resistance, heat insulation and heat retention. In particular, Styrofoam containers have become the mainstream of instant noodle containers because they are inexpensive and have excellent heat insulating properties. Food containers require three functions: distribution packaging, cooking, and tableware functions. Styrofoam containers and PS molded containers are containers that have these functions. Paper cups have historically been used as containers for instant noodles since the early days, but have been replaced by styrene foam, which has better insulation and heat retention. As containers for instant noodles using paper cups, there are only a few containers that use a single corrugated cardboard sheet in order to provide heat insulation to the surface of the paper cup or those that are wound with thick multilayer paperboard. is there.

[0003] In addition, paper cups are often used in vending machines, family restaurants, and the like. Recently, a small-sized paper cup is heated by heating the laminating PE layer of the paper cup to foam the PE surface by evaporation of the base paper moisture. Containers can also be seen. Further, among the containers in which a heat insulating material is wound around a paper cup, a method of forming an air layer in an intermediate portion by overlapping two cups as one method has already been disclosed in Japanese Utility Model Registration No. 0257797. FIG. 6 shows this container. However, in this example, the exterior material directly contacts the outer surface of the inner container near the upper opening of the container, and the air layer is extremely narrow at the upper part of the container. Not enough.

[0004]

[Problems to be solved by the invention]

 An object of the present invention is to provide a double-walled paper cup in which an inner cup and an outer cup as an exterior material are overlapped to form an air layer in an intermediate portion, and have sufficient heat insulating performance and sufficient printing characteristics on the cup surface. The purpose is to provide a paper cup held by the user. The present inventors diligently studied the structure of a heat insulating container using a paper cup, and did not use a technique such as embossing, but designed a structure in which the distance between the double walls from the upper part to the lower part of the paper cup was almost equal. By finding out, it was possible to achieve both the heat insulation properties and the surface printing properties, and to complete the present invention.

[0005]

[Means for Solving the Problems]

 The first aspect of the present invention is a paper cup body made of a member mainly made of paper, having an outward curl portion at an upper opening edge and having a substantially circular horizontal cross-sectional shape, and a paper cup body made of a member mainly made of paper. In a double-structured paper cup which covers the outside and has an outer packaging material having a circular horizontal cross-sectional shape, the upper opening of the outer packaging material has an edge portion folded inward and a front end portion corresponding to the outer side of the paper cup body. The contact portion is adhered to the paper cup body, and a part of the exterior material folded inward contacts the outward curl of the upper opening edge of the paper cup body, and the lower opening edge of the exterior material faces inward. The paper cup has a curl part, and a part of the inward curl part contacts the outside of the paper cup body, so that the distance between the paper cup body and the outer packaging material is almost the same from the top to the bottom of the paper cup. Double-structured It is an artificial insulation paper cup.

A second aspect of the present invention is that the edge of the upper opening of the exterior material is folded inward in two steps, and the folded portion at the tip contacts the outside of the paper cup body, and the contact portion contacts the paper cup. 2. The double-walled heat insulating paper cup according to claim 1, wherein the paper cup is adhered to the main body.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be specifically described below. According to the present invention, in order to provide an air layer to improve the heat insulation of the paper cup, an outer material having the same taper as the inner cup mainly made of paper is wound around the paper cup body (inner cup) and the outer material. Is provided with a substantially uniform space (air layer). The double-walled gap between the paper cup body and the exterior material should be approximately the same from the top to the bottom of the paper cup, and the dimensions of the paper cup body should be sufficient to provide sufficient heat insulation. The structure is not so hot. Although the gap size of the double wall is not particularly limited, it is preferably about 0.5 mm to 3 mm, and more preferably about 1 mm to 2 mm. Also, as a contact portion between the exterior material and the paper cup body, the bottom (small diameter side) end of the exterior material has an inward curl structure, and the upper opening side (large diameter side) end is folded inward. Further, a structure may be employed in which the end is folded in two steps along a ruled line previously applied.

As described above, in the present invention, since the structure such as embossing is not used for the exterior material, the printed display is clear even if the surface label is attached to the exterior material, and further, the air layer in the middle portion is used as an air layer. Since the necessary and sufficient thickness is secured, the heat insulation of the container is sufficiently maintained.

The double-layered heat insulating paper cup of the present invention can be manufactured by the following method. As the production equipment, a sheet punching machine, cup molding machine and wrapping exterior machine will be used. The paper cup body (inner cup) of the insulated paper cup is formed by a known paper cup molding machine. Basically, a cylindrical body is formed by heat-sealing a body-pasted part of a PE-laminated blank punched in a fan shape. After that, it is punched into a circle from a separately prepared laminated paper roll, and is combined with a bottom member (bottom plate material) drawn into a U-shape. Then, the bottom is sealed and the top opening is curled to complete the molding of the inner cup. The material of the inner cup is not particularly limited, but a paperboard having a basis weight of about 150 to 400 g / m ² can be suitably used.

The exterior material is mainly punched out from a printed paperboard having a basis weight of about 200 to 400 g / m ² , and a fan-shaped member is glued and sealed in a cylindrical shape to form a large-diameter and a small-diameter end. The part is subjected to folding or narrowing processing. Thereafter, the exterior material molded into a cylindrical shape is united with the inner cup by a method such as gluing to form a double cup having a gap between the exterior paper and the inner cup. In this way, a cheap insulated double cup can be obtained.

[0011]

【Example】

 Hereinafter, the present invention will be described with reference to the drawings. FIG. 1 is a diagram illustrating an embodiment (first embodiment) of the present invention, in which a part is cut away and a cross section is displayed. The double-layered heat-insulating paper cup 1 of this embodiment is made of a paper-based member, has an outwardly curled portion 5 at an upper opening edge, and has a substantially circular horizontal cross-sectional shape. An outer package 3 which is made of a main component and covers the outside of the paper cup body and has a circular horizontal cross section is superposed inside and outside. A bottom plate 4 is adhered and fixed to the inner surface (inside) of the paper cup body 2 at the bottom of the paper cup body 2.

The upper opening of the exterior material 3 has an edge 7 bent inward at a substantially right angle, and a leading end portion thereof contacts the outer surface of the paper cup body and a contact portion is adhered to the paper cup body 2. At the same time, a part of the edge 7 of the exterior material folded inward is in contact with the outward curl 5 at the upper opening edge of the paper cup body. Further, the lower opening edge of the exterior material has an inward curl portion 6, and a part of the inward curl portion abuts on the outer surface (outside) of the inner cup body 2, so that the paper cup body and the exterior material are separated. The intervals are formed so that they are almost equal from the top to the bottom of the paper cup.

FIG. 2 is a diagram showing another embodiment (second embodiment) of the present invention different from FIG. 2 is different from FIG. 1 in that the edge 7 of the upper opening of the exterior material 3 is bent inward at an acute angle, and the other configuration is the same as that in FIG.

FIG. 3 is a diagram showing another embodiment (third embodiment) of the present invention, which is different from FIGS. 1 and 2. In the example of FIG. 3, the edge of the upper opening of the exterior material 3 is folded inward in two stages, and the folded portion 8 at the tip is provided with a large number of press lines (straight lines). The paper cup body 2 is squeezed inward by a pressing die 9 and contacts the outside of the paper cup body 2, and the contact portion is bonded to the paper cup body 2. Other configurations are the same as those in the example of FIG.

FIG. 4 is a diagram showing a reference example (an example of a paper cup which is not described in the claims for registration but is devised by the inventor to solve the same problem). In this example, an arc-shaped projection is provided above the body of the paper cup body 2 shown in FIG. The exterior material is provided with an inward curl portion at both the upper opening edge and the lower opening edge so that the inward curl portion 11 of the upper opening edge is in contact with the projection 10 of the paper cup body. The inward curl portion 11 is bonded and fixed to the paper cup body. The other structure is the same as that of FIG. 1, and similarly to the paper cup of FIG. 1, a space (air layer) having the same thickness is formed from above to below the paper cup.

FIG. 5 is also a partial view showing a reference example. In this example, the protrusion 10 of the paper cup main body 2 of FIG. 4 is further provided above, and the inward curl portion 5 and the protrusion 1 of the upper opening edge of the paper cup main body are provided. 0, the inward curl portion 11 at the upper open end of the exterior material 3 is fixed.

[0017]

[Effect confirmation test]

Next, a test was conducted to confirm the heat insulation performance of the paper cup of the present invention, and the results will be described. For the test, a conventional paper cup having the shape shown in FIG. 6 (a cup having a maximum gap thickness of 1.5 mm in the air layer portion) and a paper cup shown in FIG. (5 mm paper cup and 2.0 mm paper cup) were prepared and used for the test. Note that none of the paper cups, paper cup body (inner cup) torso portion, the polyethylene resin laminated with basis weight 260 g / m ² paperboard, outer package uses paperboard having a basis weight of 350 g / m ² on the inside Created.

The paper cup body test method is as follows. Each paper cup is filled with hot water at 95 ° C. to a position about 10 mm lower than the upper surface of the container and sealed with aluminum foil. This was performed by holding the hand near the center in the up-down direction and examining how many seconds it could be held as usual. The test results are as shown in Table 1. From these results, it was confirmed that the double-layered heat-insulating paper cup of the present invention had better heat insulation performance than the conventional double-layered heat-insulating paper cup. In addition, as a result of performing a similar test separately on a Styrofoam cup (about 1.7 mm thick), a value of about 80 to 100 seconds was obtained as a retention time, and the product of the present invention is the same as the Styrofoam cup. It was also confirmed that a degree of heat insulation performance could be achieved.

[0019]

[Table 1]

[0020]

[Effect of the invention]

 The double-layered heat-insulating paper cup of the present invention has a simple structure and has a configuration in which the air layers are arranged at equal intervals from the top to the bottom of the paper cup, so that it is excellent in heat insulation performance and can be manufactured at a low cost. In addition, since the exterior material is not structured to be embossed or the like, the paper cup has a smooth outer surface and a clear cosmetic print.

[Brief description of the drawings]

FIG. 1 is a view of a first embodiment showing a double-layered heat insulating paper cup of the present invention.

FIG. 2 is a view of a second embodiment of the present invention showing the double-layered heat-insulating paper cup;

FIG. 3 is a view of a third embodiment of the present invention showing the double-layered heat-insulating paper cup;

FIG. 4 is a diagram of a first reference example showing a double structure heat insulating paper cup;

FIG. 5 is a partial view of a second reference example showing a double structure heat insulating paper cup.

FIG. 6 is a diagram of a conventional double paper cup.

[Explanation of symbols]

 1: double-walled heat-insulating paper cup 2: paper cup body (inner cup) 3: exterior material 4: bottom plate 5: outward curl at the upper opening edge of the paper cup body 6: inward curl at the lower opening edge of the exterior material 7: Edge part of the exterior material folded inward 8: Folded part of the tip part folded in two steps of the exterior material 9: Press line (linear press type) 10: Projection 11: Upper opening edge of the exterior material Inward curl section at

Claims (2)

[Utility model registration claims] 1. A paper cup body having a substantially circular horizontal cross-sectional shape having an outward curl portion at an upper opening edge and made of a member mainly made of paper, and covering the outside of the paper cup body made of a member mainly made of paper. In a double-structured paper cup having an outer material having a substantially circular horizontal cross-sectional shape, an upper opening of the outer material is folded inward at an edge portion, and a front end portion abuts on and contacts the outside of the paper cup body. Part is adhered to the paper cup body, and a part of the exterior material folded inward abuts on the outward curl portion of the upper opening edge of the paper cup body, and the lower opening edge of the exterior material has an inward curl portion. Then, a part of the inward curl portion abuts on the outside of the paper cup main body, so that the interval between the paper cup main body and the exterior material is formed to be substantially equal from the upper part to the lower part of the paper cup. Double structure break Thermal paper cup. 2. An edge portion of an upper opening of the exterior material is folded inward in two stages, and a folded portion at a tip portion contacts the outside of the paper cup body, and the contact portion is bonded to the paper cup body. 2. The double-walled heat insulating paper cup according to claim 1, wherein: