JP2014084175A - Heat insulating cup - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat insulating cup which can be inexpensively manufactured in a production line.SOLUTION: A heat insulating cup comprises an inner cup 10, a lid member 30, and a paper-made outer casing 50 covering the inner cup 10. An embossed part is formed on an outer periphery 10A of a drum part of the inner cup. In this embossed part, a plurality of convex rhombic parts in the same shape are continuously formed having the convex rhombic parts as constitutional unit surfaces, and the embossed part is configured to form a raised pattern on the outer periphery of the drum part of the inner cup. A lot of gap parts 16 are formed between the outer periphery of the drum part of the inner cup and an inner periphery 50A of a drum part of the outer casing.

Description

The present invention relates to a heat insulating cup.

Conventionally, as a container for packaging instant foods such as ramen, as a heat insulating cup consisting of a plastic layer, an adhesive, and a paper layer from the inside, the paper layer is laminated in order from the outside, a paperboard layer, a corrugated paper layer, and a reinforced paperboard layer An insulated cup has been proposed (Patent Document 1).

JP-A-7-81005

However, in the heat insulating cup having a corrugated paper layer, it is difficult to mass-produce the heat insulating cup on the production line, so that the productivity is inferior and the heat insulating cup cannot be mass-produced at a low cost. It was.

Accordingly, the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a heat insulating cup that can be produced on a production line and can be produced at low cost.

Another object of the present invention is to provide a heat insulating cup having a high heat insulating property of a container.

Another object of the present invention is to provide a heat insulating cup having high compressive strength (buckling strength).

Yet another object of the present invention is to provide a heat insulating cup that has no restrictions on expression by printing on the outer peripheral surface of the heat insulating cup, and is excellent in terms of food labels such as sellers and contents and appeal of products. There is to do.

The heat insulation cup according to the present invention is a heat insulation cup provided with a resin inner cup in which an opening is formed and an embossed portion is formed on the outer periphery of the body portion, and a paper outer cylinder covering the inner cup. The embossed portion of the inner cup is formed by continuously forming a plurality of convex rhombus portions having the same shape with the convex rhombus portion as a constituent unit surface, and forming a pattern protruding on the outer periphery of the inner cup body, A gap is formed between the inner periphery of the inner cup and the inner periphery of the outer cylinder.

A top is formed at the center of the convex rhombus, and the contact between the outer periphery of the inner cup and the outer cylinder of the inner cup provided with this apex is used as a point contact to reduce heat conduction from the inner cup to the outer cylinder, thereby contributing to heat insulation. It is preferable to adopt a configuration to do so.

The inner cup may be composed of a single layer of a thermoplastic resin sheet, and may be formed of a laminated structure of two or more layers, for example, a three-layered thermoplastic resin sheet having an innermost layer, an intermediate layer, and an outermost layer. You can also.

According to the present invention having the above configuration, the following effects can be obtained.
(1) It is possible to produce on a production line, and an insulated cup that can be produced at low cost can be obtained.
(2) A heat insulating cup having a high heat insulating property of the container is obtained.
(3) A heat-insulating cup having high compressive strength (buckling strength) and less likely to cause deformation of the cup due to pallet stacking during warehouse storage, for example, is obtained.
(4) There is no restriction of expression by printing on the outer peripheral surface of the heat insulating cup, and an excellent heat insulating cup can be obtained in terms of food labels such as sellers and contents and appeal of products.

It is a perspective view which shows the heat insulation cup which concerns on the Example of this invention, and shows the state which peeled a part of cover body. The center longitudinal cross-section schematic of the heat insulation cup which concerns on the Example of this invention is shown. It is a front view of the inner cup which comprises the heat insulation cup which concerns on the Example of this invention. The center vertical end surface schematic of the inner cup which comprises the heat insulation cup which concerns on the Example of this invention is shown. FIG. 5 is a partially enlarged end face schematic view taken along the line XX in FIG. 4. FIG. 6 is a partially enlarged schematic end view of a YY section in FIG. 4.

Below, the Example of the heat insulation cup of this application is described using drawing.

1 to 4, the heat insulating cup 1 includes an inner cup 10, a lid member 30, and a paper outer cylinder 50 that covers the inner cup 10.

The inner cup 10 is formed of a single layer thermoplastic resin sheet. The inner cup 10 includes an opening 11 and a flange 12 is formed on the periphery of the opening.

An embossed portion 13 is formed on the outer periphery 10 </ b> A of the inner cup 10. The embossed portion 13 is formed by continuously forming a plurality of convex rhombus portions 14, 14... Having the same shape with the convex rhombus portion 14 as a constituent unit surface, and is raised on the outer periphery of the inner cup barrel portion. Is formed and configured. .. Are formed between the outer periphery 10A of the inner cup 10 and the inner periphery 50A of the outer cylinder 50.

A top 15 is formed at the center of the convex rhombus 14, and the contact between the outer peripheral portion of the inner cup 10 and the outer cylinder 50 of the inner cup 10 provided with the top 15 is a point contact from the inner cup 10 to the outer cylinder 50. The heat conduction is reduced to contribute to heat insulation. The inner cup 10 and the outer cylinder 50 are bonded.

The lid 30 is heat-sealed at the flange portion 12 to seal the inner cup 10.

Further, as described above, the outer cylinder 50 is covered outside the inner cup 10, and the outer cylinder includes a paperboard layer 51, and the paperboard layer is formed by winding the inner cup 10 as a sleeve. . Thus, there is no restriction of expression by printing on the outer peripheral surface of the heat insulating cup 1, and it is possible to form a heat insulating cup that is excellent in terms of food display such as sellers and contents, and appeal of products. A curled portion 57 is formed by curling the lower end of the sleeve inward.

[Compression strength test (buckling strength test) and heat insulation test of heat insulation cup]
Heat insulation cup according to the present invention and Comparative Example 1 [Insulation cup provided with plastic layer (surface flat), corrugated paper layer, sleeve from inner surface], Comparative Example 2 [Plastic layer (surface flat) from inner surface, sleeve (however, About each heat insulation cup of the heat insulation cup provided with the embossed paper], the compressive strength test (buckling strength test) and the heat insulation test were done by the following test methods.
(Measurement method of compressive strength test (buckling strength test))
The heat insulating cup was set vertically on a compressive strength measuring machine, the crosshead speed was set to 50 mm / min, a vertical load was applied, and the load when the inner cup was buckled was measured.
(Measurement method for thermal insulation test)
With the heat insulating cup fixed to the jig, a fixed amount (about 320 ml) of boiling water was put into the heat insulating cup and covered with a lid. Measurement was started by starting the thermometer in a state where the heat insulation cup was pressed with a force of 5 N using a force gauge. The surface temperature sensor was pressed against the center of the outer cylinder of the heat insulation cup with a constant pressure, and the surface temperature of the heat insulation cup was measured. The peak value for 3 minutes from the start of measurement was measured, the same test was performed 3 times, and the average value of 3 times was taken as the measured value of the cup surface temperature.
The test results are shown in Table 1.

DESCRIPTION OF SYMBOLS 1 Heat insulation cup 10 Inner cup 11 Opening part 12 Flange part 13 Embossed part 14 Convex-shaped rhombus part 15 Top part 16 Cavity part 30 Cover body 50 Outer cylinder 51 Paperboard layer 57 Curled part

Claims (2)

A heat-insulating cup comprising an inner cup made of resin in which an opening is formed and an embossed part is formed on the outer periphery of the body, and a paper outer cylinder covering the inner cup,
The embossed portion of the inner cup is formed by continuously forming a plurality of convex rhombus portions having the same shape with the convex rhombus portion as a constituent unit surface, forming a pattern protruding on the outer periphery of the inner cup body, The heat insulation cup characterized by forming the space | gap part between the trunk | drum outer periphery of an inner cup, and the trunk | drum inner periphery of the said outer cylinder. The heat insulation cup according to claim 1, wherein the convex rhombus has a top at the center.

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