JPH06156469A - Paper tray - Google Patents

Abstract

PURPOSE:To use a paper tray as a container of fruits and vegetables which contain moisture. CONSTITUTION:A sheet of blank paper is folded to form a nearly rectangular bottom 1 and side walls 2a and 2b which are raised from the bottom 1. Extending parts 3 of the long side walls 2a are folded and pasted on the outer faces of the adjacent short side walls 2b to form a tray main body, and a water- absorbing sheet 4 endowed with antifungal properties is attached so as to cover the inner surface of the bottom 1. Therefore, as moisture contained in the content is absorbed by the water-absorbing sheet 4, a decrease in the rigidity of the tray main body is prevented. In addition, the buffering effect of the water- absorbing sheet 4 prevents the content from deteriorating and its antifungal properties restrain the growth of microorganism and keep its freshness for a long period of time. The spacing effect of the water-absorbing sheet 4 allows the trays in stack to be easily taken out.

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 suitable for containing strawberries and other fruits and vegetables.

[0002]

2. Description of the Related Art Conventionally, a plastic tray is generally used as a container for arranging strawberries in a store. In addition to strawberries, similar plastic trays are used for various fruits and vegetables such as melons, pears, tomatoes and eggplants. In addition to plastic trays, for example
There is an assembling container made of cardboard for packaging chicken eggs, fruits and vegetables, etc. as described in the publication. In addition, the actual development Sho 62-
Japanese Patent No. 80870 discloses a molded container for fresh food using a laminated material formed by coating a water absorbent resin on a substrate such as plastic.

[0003]

As described above, the tray-shaped container for storing strawberries is usually made of plastic, but recently, as an ecological measure, there is a demand to use a paper tray instead of the plastic tray. However, the paper tray has a problem that it absorbs water and loses rigidity when it contains a lot of water such as strawberries.
In addition, there is a problem that the contents are easily damaged due to no buffering action, or when the same shapes are stacked, they are in close contact with each other and it is not easy to take them out one by one. Further, there is a problem that the contents with such a high moisture content come into direct contact with the paper container, the microorganisms easily propagate, and the contents rot more quickly.

The present invention has been made in view of the above problems, and an object of the present invention is to enable the use of a paper tray as a container for fruits and vegetables containing water.

Further, the present invention provides a paper tray which prevents the rigidity of the container from being lowered due to the moisture discharged from the contents, has a cushioning action, and can be easily taken out from the stack. With the goal.

Another object of the present invention is to provide a paper tray capable of preventing the growth of microorganisms and keeping freshness for a long time.

[0007]

The paper tray of the present invention comprises a bottom formed of a paper blank and side walls folded from the bottom and connected to each other.
A water absorbing sheet is laid on the bottom portion.

The water absorbing sheet may have antibacterial properties.

[0009]

In the paper tray of the present invention, the moisture absorbing sheet absorbs the moisture that comes out of the contents, thereby preventing the tray body from absorbing moisture and losing its rigidity. Further, the water absorbing sheet acts as a cushioning material, and deterioration of the contents due to impact is prevented. Further, when the paper trays are stacked, the water absorbing sheets serve as spacers to form a gap between the tray bodies, which makes it easy to take out the paper trays one by one. Further, by imparting antibacterial properties to the water-absorbent sheet, the proliferation of microorganisms is suppressed, and the freshness of the food, which is the content, is maintained for a long time.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a paper tray according to an embodiment of the present invention, and FIG. 2 is a plan view of the paper tray. In the paper tray of this embodiment, one paper blank is folded to form a substantially rectangular bottom portion 1 and a pair of side walls 2a and 2b on the long side and the short side folded up from the bottom portion 1, Each side wall 2a on the long side
Side walls 2 on the short side adjacent to each other by folding back the extension portions 3 on both sides of the
The tray main body is made by gluing the outer surface of b to the tray main body, and the water absorbing sheet 4 is attached so as to cover the inner surface of the bottom portion 1.

The water-absorbent sheet 4 is formed, for example, between a water-permeable film (paper, non-woven fabric, etc.) and a water-impermeable film (plastic film) and an acrylate superabsorbent resin and an antibacterial metal ion (silver, An antibacterial sheet formed by sandwiching zeolite-based solid particles carrying (copper, zinc, etc.) and ethylene-vinyl acetate copolymer as an adhesive between them and thermocompression bonding, in which case a water-permeable membrane is placed on the upper surface. It is attached to the bottom 1 so that

This paper tray can be used as a strawberry container, or as a container for fruits and vegetables such as melon, pear, cherry tomato, eggplant, mandarin orange, bamboo shoot, peach, and persimmon. At this time, the water that comes out of the contents is absorbed by the water absorbing sheet 4, so that the tray body is prevented from absorbing the water and losing its rigidity, and the water absorbing sheet 4 acts as a cushioning material, so that the contents due to the impact are absorbed. Deterioration of objects is prevented.

Further, in the case of a paper tray, it is not possible to form a flange on the opening edge unlike the plastic tray, so that the opening edge is in close contact with each other in the stacked state and it is not easy to separate them. Therefore, in general, it is necessary to take measures such as providing a projection on the bottom to make a gap between stacked containers, or providing a winding fastening portion at the opening edge like a paper cup. However, in the case of the paper tray of this embodiment, as shown in FIG. 3, the water absorbing sheet 4 serves as a spacer to form a gap between the upper and lower tray bodies, so that the above-mentioned protrusions and winding tightening portions are not provided. Both are easy to pull apart and can be easily taken out one by one from the stack. Further, since the water absorbing sheet 4 is an antibacterial sheet, the growth of microorganisms is suppressed and the freshness of the contents is maintained for a long time.

[0015]

The present invention is constructed as described above, and it is possible to prevent the rigidity of the paper tray from being lowered by the moisture discharged from the contents, and also to prevent the contents from deteriorating due to the cushioning action, and to prevent the sheet. Since the antibacterial action of the above can suppress the proliferation of microorganisms and keep the freshness of the contents for a long time, the paper tray can be used as a container for fruits and vegetables. In addition, the spacer action of the water absorbing sheet laid on the bottom facilitates removal from the stack.

[Brief description of drawings]

FIG. 1 is a perspective view of a paper tray according to an embodiment of the present invention.

FIG. 2 is a plan view of a paper tray according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view illustrating a stacking state of paper trays according to an exemplary embodiment of the present invention.

[Explanation of symbols]

 1 Bottom part 2a, 2b Side wall 4 Water absorbing sheet

Claims (2)

[Claims] 1. A tray-shaped container formed of a paper blank and having a bottom portion and side walls folded from the bottom portion and connected to each other, wherein a water absorbing sheet is laid on the bottom portion. Paper tray. 2. The paper tray according to claim 1, wherein the water absorbing sheet has antibacterial properties.