JPH10101153A - Cup container for microwave oven - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable direct holding of the external face of a container with one's bare hand after the contents have been heated in a microwave oven, by sticking a heat-insulation sheet on the outer periphery of the cup container. SOLUTION: A heat-insulation sheet B constituted of a heat-insulative sheet 11 and an adhesive layer 21 laminated on the rear face of the heat-insulative sheet 11 is stuck on the outside face of the peripheral side face 1 of a cup container A. The heat-insulative sheet 11 is formed of a single raw material sheet 12. Non-woven cloth made by mixing of natural fiber and synthetic fiber chiefly composed of natural fiber, non-woven cloth made by mixing of synthetic fiber and natural fiber chiefly composed of synthetic fiber, or porous foam sheet made by foaming of synthetic resin, is used. Since the heat-insulation sheet containing air, provided with a porous non-woven cloth or a foam layer is stuck on the outer peripheral face of such a container, a heat-insulation effect is brought out and the structure makes it possible to directly hold the container with one's bare hand and take it out even immediately after it has been heated in a microwave oven.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave oven cup for packaging an article for heating a microwave oven such as a cooked food or a cooked food.

[0002]

2. Description of the Related Art Conventionally, there are various types of cup containers for microwave ovens, but after heating the contents of the cup container with a microwave oven, the outer peripheral side surface of the cup container is heated so that it cannot be directly held by hand. Therefore, it was difficult to directly take out the cup container from the microwave oven by hand.

In order to prevent the heat from being transmitted to the outer periphery of the cup container even when the contents are heated, the cup container body is formed of a heat insulating material such as porous styrene foam or the cup container. As the microwave oven cup container, one having an irregular outer peripheral surface formed by press embossing or the like, or having a double inner peripheral surface inside a cup container is used as a microwave oven cup.

However, in the cup container, a special heat-insulating resin material such as styrene foam is used for the molding process of the cup container body, the cup container body is press-embossed, or the peripheral side wall of the cup container is formed. It takes time and effort to form a complicated double structure, and the cost of materials and production tends to be higher than that of ordinary cup containers such as paper cups and plastic cups.

The present invention relates to a cup container having a heat insulating property such that the outer peripheral surface of the cup container can be directly held by a hand even after the contents of the cup container are heated by a microwave oven. It is to make it possible at a cost.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a cup container A.
A heat insulating sheet B is adhered to an outer peripheral surface of the microwave oven.

The present invention also provides the above-mentioned microwave oven cup container, wherein the heat-insulating sheet B comprises a heat-insulating sheet 11;
This is a cup container for a microwave oven constituted by an adhesive layer 21 provided on the back surface of the sheet 11.

The present invention also relates to the above-mentioned microwave oven cup container, wherein the heat insulating sheet 11 is a heat insulating single material sheet 12.

The present invention also provides the above-mentioned microwave oven cup container, wherein the heat-insulating sheet 11 comprises a base sheet 13 made of paper or a synthetic resin film, and a heat-insulating single-material sheet laminated on the sheet 13. 12 is a microwave oven cup container.

The present invention also provides the microwave oven cup container, wherein the heat-insulating single-material sheet 12 is a natural or synthetic nonwoven fabric sheet or a foam sheet.

The present invention also relates to the above-mentioned microwave oven cup container, wherein the heat insulating sheet 11 comprises a base sheet 13 made of paper or a synthetic resin film, and a foamable resin layer before foaming laminated on the sheet 13. 14 is a microwave oven cup container.

The present invention also relates to the above-mentioned microwave oven cup container, wherein the cup container A is filled with the contents and sealed with a cover sheet.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The microwave oven cup container of the present invention will be described below in detail according to embodiments.

FIG. 1A is a perspective view of a cup container for a microwave oven according to the present invention, wherein A is a cup container, 1 is an outer peripheral surface of the cup container A, 2 is a bottom surface, and 3 is an upper opening flange portion. , B are heat insulating sheets bonded to the outer peripheral surface 1.

The shape and material of the cup container A are not limited. For example, the cup container A may be a normal paper cup or a plastic cup. I have.

FIG. 1B is an enlarged side view of a portion M of the cup container for a microwave oven according to the present invention. The heat insulating sheet 11 and the heat insulating sheet are provided on the outer surface of the peripheral side surface 1 of the cup container A. The heat insulating sheet B is adhered to the adhesive layer 21 laminated on the back surface of the sheet 11.

The adhesive layer 21 may be of a dry type or a wet type, and may be a heat-meltable heat-sensitive adhesive (acrylic, polyester, vinyl acetate adhesive, other hot melt type). Adhesives),
An adhesive pressure-sensitive adhesive (acrylic, polyester, vinyl acetate-based adhesive) or the like is used.

The heat insulating sheet B to be adhered to the microwave oven cup container of the present invention is as shown in FIGS. 2 (a) to 2 (c).

FIG. 2A is an example of the heat insulating sheet B, and is a side sectional view of the heat insulating sheet B composed of the heat insulating sheet 11 and the adhesive layer 21. It is formed by a certain single material sheet 12.

The heat-insulating single-material sheet 12 may be a nonwoven fabric formed by mixing natural fibers (cellulose fibers) or synthetic fibers mainly composed of natural fibers (fibers made of polypropylene, nylon, polyethylene terephthalate, etc.), or A synthetic fiber (a fiber made of polypropylene, nylon, polyethylene terephthalate or the like) or a nonwoven fabric mixed with a natural fiber (cellulose fiber) mainly composed of a synthetic fiber, or a synthetic resin such as polypropylene or polyethylene terephthalate is mixed and foamed with a foaming agent. A porous foam sheet is used.

FIG. 2B shows another example of the heat insulating sheet B composed of the heat insulating sheet 11 and the adhesive layer 21. As the heat insulating sheet 11, natural fibers or Insulation such as a non-woven fabric made of fibers mainly composed of natural fibers, or a non-woven fabric made of synthetic fibers or fibers mainly composed of synthetic fibers, or a porous foam sheet formed by mixing a synthetic resin with a foaming agent and foaming. A laminate of single material sheets 12 is used, and a paper sheet, a plastic film, or a plastic sheet is used as the base sheet 13.

FIG. 2C shows another example of the heat insulating sheet B composed of the heat insulating sheet 11 and the adhesive layer 21.
The foaming resin layer 14 before foaming (a foaming resin layer of a resin type or printing ink type, which is obtained by mixing and adding a foaming agent having an expansion ratio into a synthetic resin liquid as appropriate; a dried and solidified film layer) A material that is partially or partially (patterned) laminated is used.

When the heat insulating sheet B provided with the foamable resin layer 14 before foaming is adhered to the cup container A via the adhesive layer 21, when the contents of the cup container A are heated by a microwave oven, At the same time, the foamable resin layer 14 is also heated and foamed to form a porous heat-insulating layer.

FIG. 3A shows a heat insulating sheet B according to the present invention in which a printed pattern layer 15 is provided on the surface of the heat insulating sheet 11, and FIG. A heat insulating sheet B in which a picture layer 15 is provided and a protective layer 16 made of a transparent synthetic resin is provided on the surface of the printed picture layer 15, and can be used as a heat insulating label or heat insulating seal.

FIG. 4 shows another embodiment of the cup container for a microwave oven according to the present invention, wherein a cover sheet 4 is adhesively sealed to the upper opening flange portion 3 of the cup container A so as to be peelable.
The cup container A is in a sealed state. The inside of the cup container A is filled with instant food for heating or the like, and then the cover sheet 4 is sealed with an adhesive seal. In addition, 5 is a knob protrusion for opening.

In the present invention, the cup container A may be a paper cup container having a paraffin coating or a synthetic resin coating on the inner surface or the inner and outer surfaces of the cup container A, and a plastic cup container.

As a plastic cup container A,
Multi-layered synthetic resin film (eg, polypropylene), double-layered synthetic resin film (eg, polypropylene / polyethylene), or triple-layered synthetic resin film (eg, polypropylene / ethylene-vinyl alcohol / polypropylene) Those molded with a synthetic resin film can be used.

The cover sheet 4 used in the microwave oven cup container (see FIG. 4) according to the other embodiment of the present invention can be appropriately selected and used depending on the material of the cup container A. When the cup container A is molded from a synthetic resin film having a three-layer structure (polypropylene / ethylene-vinyl alcohol / polypropylene, etc.), polyethylene terephthalate / nylon /
A three-layer synthetic resin film of unstretched polypropylene can be used, and the polypropylene resin layer of the upper opening flange portion 3 of the cup container A and the polyethylene terephthalate layer (or unstretched polypropylene layer) of the cover sheet 4 are added later. The cup container A is hermetically sealed by heat bonding so that the cup container A can be peeled and opened.

[0029]

The cup container for a microwave oven according to the present invention has a heat insulating sheet adhered to the outer peripheral surface of the cup container main body. The heat insulating sheet can also be applied to a simple paper or plastic cup container main body having a simple structure. Can be applied to obtain a heat insulating microwave cup container.

For example, the present invention is used as a microwave oven cup container having a heat insulating effect in which instant foods for heating a microwave such as retort soup, retort cup soup, instant miso soup, instant soup, and other various microwave heating articles are packaged. The heat insulating sheet adhered to the outer peripheral surface of the cup container can be used as a label, a sticker, or the like for displaying a product or decoration by appropriately printing and displaying a printed pattern, characters, or the like on the surface.

In order to fill a cup container with food and sterilize the retort, it is necessary to package the food using a plastic cup container such as polypropylene. When this cup container is heated by a microwave oven, However, the heat of the contents is transmitted to the outer peripheral surface of the cup container main body and is heated so that it cannot be held by hand. However, the microwave cup container of the present invention has a porous nonwoven fabric or a foam layer on the outer peripheral surface of the cup container. Because the heat-insulating sheet containing air is adhered, the heat transfer to the outer surface of the heat-insulating sheet can be delayed to exhibit the heat insulating effect.
The cup container can be directly taken out of the microwave oven by hand, and the cup container can be easily heated by the microwave oven.

Further, in the cup container for a microwave oven of the present invention, the heat insulating sheet can be easily and mechanically bonded to the cup container body by a labeler device for a normal cup container.

[Brief description of the drawings]

1A is an external perspective view of a microwave oven cup container according to the present invention, and FIG. 1B is a partial sectional side view thereof.

FIGS. 2A to 2C are side sectional views of various heat insulating sheets adhered to the outer peripheral surface of the container of the microwave oven cup container of the present invention.

3A and 3B are side sectional views of various heat-insulating labels and seals adhered to the outer peripheral surface of the container of the microwave oven container according to the present invention.

FIG. 4 is an external perspective view illustrating another embodiment of the microwave oven cup container of the present invention.

[Explanation of symbols]

A: cup container B: heat insulating sheet 1: outer peripheral surface 2: bottom surface 3: upper opening flange portion 4:
Covering sheet 5 ... Opening knob

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koichi Tanaka 1-5-1, Taito, Taito-ku, Tokyo Letterpress Printing Co., Ltd.

Claims (7)

[Claims] 1. A cup container for a microwave oven, wherein a heat insulating sheet B is adhered to an outer peripheral surface 1 of a cup A. 2. The heat insulating sheet B is a heat insulating sheet 11
The microwave oven cup container according to claim 1, comprising: an adhesive layer 21 provided on the back surface of the sheet 11. 3. The cup container for a microwave oven according to claim 2, wherein the heat insulating sheet 11 is a heat insulating single material sheet 12. 4. The microwave oven according to claim 2, wherein the heat insulating sheet is a base sheet made of paper or a synthetic resin film, and a heat insulating single material sheet laminated on the sheet. Cup container. 5. The microwave oven cup container according to claim 3, wherein the heat insulating single material sheet 12 is a natural or synthetic fiber nonwoven fabric sheet or a foam sheet. 6. The microwave oven cup according to claim 2, wherein the heat insulating sheet is a base sheet made of paper or a synthetic resin film, and a foaming agent layer before foaming laminated on the sheet. container. 7. The microwave oven cup container according to claim 1, wherein said cup container A is filled with contents and sealed with a cover sheet.