JPH11124119A - Tray-like container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a container convenient for wrap-packaging using a tray-like container to save labor for preparing a water absorbing sheet or an oil absorbing sheet and placing the sheet in packaging contents containing moisture or oil. SOLUTION: The tray-like container A is molded by vacuum molding or pressure forming using a composite sheet material comprising a plastic film layer 1 and a non-woven cloth layer 2. The tray-like container A comprises the composite sheet material comprising the plastic film layer 1 and the non- woven cloth layer 2 tightly molded by vacuum molding or pressure forming on an internal face of an intermediate tray-like container molded with the non-woven cloth layer 2 on an internal side of the container or which comprises a paper board layer 3 molded into a tray. The container A is tightly molded with the non-woven cloth layer 2 on the internal side of the container.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tray-shaped container having water absorption and hygroscopicity.

[0002]

2. Description of the Related Art Plastic tray-shaped containers are used to put fresh or frozen foods such as seafood and fruits and vegetables, or prepared foods such as tempura and fried foods in a tray-shaped container, and package the outside thereof using a wrap film. In general, it is widely used as a container or the like.

[0003] Contents such as fish and shellfish and fresh foods contain moisture, and in the case of contents packaged as frozen foods, moisture is generated at the time of thawing, and tempura and fries contain oil. It is easy for moisture and oil to leak out from the wrapped container. I have.

[0004]

However, in the case of wrapping as described above, it is necessary to prepare a water-absorbing sheet or an oil-absorbing sheet to be spread on the inner bottom surface of the tray-shaped container. It took extra time to lay.

[0005] The present invention is a container which is convenient for wrapping and packaging using a tray-like container. When wrapping and wrapping contents containing water and oil, preparation of a water-absorbent sheet or an oil-absorbing sheet is desired. And to save labor of laying those sheets.

[0006]

Means for Solving the Problems A first invention of the present invention is:
A plastic film layer 1 and a nonwoven fabric layer 2 are formed on the inner surface of an intermediate tray-shaped container made of a paperboard layer 3 formed into a tray.
A tray-shaped container in which the composite sheet material is tightly formed by vacuum forming or pressure forming, wherein the non-woven fabric layer 2 is formed on the inner surface side of the container and is closely formed.

The present invention also provides the tray-shaped container according to the above invention, wherein the tray-shaped container is provided with a flange portion,
This is a tray-shaped container provided with a region where the nonwoven fabric layer 2 is not formed along the outer peripheral end or the inner peripheral end of the flange portion.

[0008]

The tray-shaped container of the present invention is formed by a composite structure of the plastic film layer 1 and the non-woven fabric layer 2 and thus has not only a waterproof property but also a water-absorbing or oil-absorbing non-woven fabric on the inner bottom surface of the container. When the wrapping is performed by placing the contents containing moisture and oil in a tray-like container and wrapping it with a wrap film from the outside thereof, the moisture and oil coming out of the contents are not covered by the nonwoven fabric layer 2. , And can be prevented from leaking out of the wrap package.

In the tray-shaped container of the present invention, an adhesive layer is provided as necessary on the surface of the nonwoven fabric layer 2 at the flange portion, and a sheet-shaped sealing lid material (at least a heat-sealed portion on the back surface) is provided at the opening of the container. A plastic film, an aluminum foil, or the like having a sealing property) is superimposed on the surface of the nonwoven fabric layer 2 of the flange portion to cover and heat-seal it, and the lid can be covered with the sealing property. it can.

In the tray-shaped container of the present invention, an adhesive layer is provided as necessary in a region where the nonwoven fabric layer 2 is not formed on the flange portion, and a sheet-shaped sealing lid ( At least the back has heat sealability)
Can be overlaid on the surface of the flange portion, covered and heat-sealed, and can be covered in a sealed state.

The tray-shaped container of the present invention can be used, for example, for heating a microwave oven. In this case, when the contents are put in a tray-shaped container and a lid material is provided and the microwave is heated while maintaining the sealed state, the water vapor generated from the food is released to the outside from the flange end surface of the tray-shaped container through the nonwoven fabric layer 2. When a tray-shaped container for heating a microwave oven is used, for example, when the nonwoven fabric layer 2 has a large thickness or the nonwoven fabric layer 2 has a coarse fiber density, the outer wrap film is opened. Without this, air can be removed by microwave heating.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a tray-shaped container according to the first invention will be described in detail with reference to the sectional side view of FIG. A
1 is an overall perspective view showing an example of a tray-shaped container according to the first invention or the second invention, which is a rectangular tray-shaped container in plan view, 11 is a container bottom portion, 12 is a side portion, and 13 is a necessary portion. It is a flange portion provided accordingly. The planar shape of the tray-shaped container of the present invention is not limited to a rectangular shape, but may be a polygonal shape, an elliptical shape, a circular shape, or the like.

FIG. 2A shows a tray-shaped container A according to the first invention.
FIG. 2B is a partial side sectional view of a bottom portion 11 of the tray-shaped container A, and FIG. 2B is a side sectional view of a side portion 12 and a flange portion 13 of the tray-shaped container A. Are the water-absorbing or oil-absorbing nonwoven fabric layer 2. Note that, in FIG.
Is provided with a nonwoven fabric layer 2 on the entire surface, but in the present invention, if necessary, a region where the nonwoven fabric layer 2 is not laminated is provided along the outer peripheral end or inner peripheral end of the flange portion 13. Is possible.

The tray-shaped container A of the first invention can be manufactured by a vacuum forming method.
A composite sheet material comprising a non-woven fabric layer 2 and a water-absorbing or oil-absorbing nonwoven fabric layer is coated on a vacuum forming mold (a wooden mold or a metal mold) for forming a tray-like container, and the composite sheet material is heated while heating. Air suction through the vacuum suction holes provided at the bottom, side, or boundary between the bottom and side of the mold, and after adsorbing the composite sheet material on the inner surface of the mold, solidify by cooling. It is manufactured by The above-mentioned molding method may be a compressed air molding method.

As the plastic film layer 1 of the composite sheet material used for molding the tray-shaped container A of the first invention, a thermoplastic plastic film can be used. For example, polypropylene, polyethylene, polyethylene terephthalate, polypropylene, or the like can be used. Vinyl chloride or the like can be used.

The layer thickness of the film layer 1 is not particularly limited, but can be appropriately set, for example, by setting the layer thickness to be large according to the specifications of the container such as the strength and waterproofness of the container.

As the non-woven fabric layer 2, a non-woven fabric sheet mainly composed of natural fibers or synthetic resin fibers such as rayon, satin, nylon, polyester, polyolefin (polyethylene, polypropylene, etc.) and cellulose can be used.

The layer thickness of the non-woven fabric layer 2 is not particularly limited, but can be appropriately set, for example, by setting the layer thickness thicker in accordance with the required water absorption and the required oil absorption of the container.

Further, as the thickness of the nonwoven fabric layer 2 is increased,
In addition, as the nonwoven fabric layer 2 having a higher fiber density is used, the air permeability of the nonwoven fabric increases, and for example, air can be released by heating the microwave oven without opening the lid as a package for heating the microwave oven. Become. Also in this case, if the content is frozen food, no leakage of the content occurs during distribution and storage. In addition, freeze-drying during freezing does not occur.

FIG. 3 is a partial side sectional view of the tray-shaped container A of the second invention shown in FIG. 1, and a plastic film is formed on the inner surface of the intermediate tray-shaped container formed of the paperboard layer 3 formed into a tray shape. This is a tray-like container in which a composite sheet material of the layer 1 and the nonwoven fabric layer 2 is closely formed by vacuum forming or pressure forming. The tray-like container A according to the second aspect of the present invention.
Also, the nonwoven fabric layer 2 is subjected to close contact forming processing with the nonwoven fabric layer 2 facing the inner surface of the container.

The paperboard layer 3 formed into a tray is formed by bending each fold from a blank paperboard sheet on the inner surface of a tray-shaped forming die for vacuum forming or pressure forming a composite sheet material. Load the intermediate tray-shaped container,
It is manufactured by covering the composite sheet material from above and performing vacuum forming or pressure forming while heating.

[0022]

According to the tray-shaped container of the present invention, it is not necessary to prepare a water-absorbing sheet or an oil-absorbing sheet to be spread on the inner bottom surface of the tray-shaped container as in the conventional case. When wrapping the contents containing moisture such as seafood and fresh food, frozen foods that generate moisture by thawing, and the contents containing oil such as tempura and fry in a dray-shaped container, This can save labor for preparing a water-absorbing sheet or an oil-absorbing sheet and laying those sheets in a tray-like container, which is effective for improving the efficiency of wrap packaging work using a wrap film using the tray-like container.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a tray-shaped container according to the first invention or the second invention.

FIGS. 2A and 2B are partial side sectional views of the tray-shaped container of the first invention.

FIG. 3 is a partial sectional side view of the tray-shaped container of the second invention.

[Explanation of symbols]

A: tray-like container 1: plastic film layer 2: nonwoven fabric layer 3: paperboard layer 11: bottom part 12: side part 13: flange part

Claims (2)

[Claims] 1. A plastic film layer 1 is formed on the inner surface of an intermediate tray-shaped container comprising a paperboard layer 3 formed into a tray.
A tray-like container in which a composite sheet material of the non-woven fabric layer 2 and the non-woven fabric layer 2 are tightly formed by vacuum forming or pressure forming, wherein the non-woven fabric layer 2 is tightly formed with the inner surface of the container. container. 2. The tray according to claim 1, wherein the tray-shaped container is provided with a flange portion, and a region along which the nonwoven fabric layer 2 is not formed along the outer peripheral edge or the inner peripheral edge of the flange portion. Container.