JP2017036086A - Food storage container made of pulp material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a food storage container by which blood and juice do not enter the food storage container formed of a cardboard-like object composed of a pulp material, even if meat and a fish are obliquely or inversely stored.SOLUTION: A food storage container is formed by a process of forming in a cardboard-like object from a pulp material, forming a cutting part for forming a side surface piece in the four-corners of the cardboard-like object by coating a thermoplastic resin having heat seal capacity on the cardboard-like object and forming an overlapping part of a side surface piece in the four-corners by sticking to a surface of a sidewall by folding back a folding-back part, by providing the folding-back part in an upper part than a folding-in piece of the sidewall of sticking to the surface of the sidewall longer than the folding-in piece, by forming the folding-in piece shorter than adjacent both side parts, by providing the folding-in piece for connecting the side surface piece adjacent to the four-corners, and prevents blood and juice from entering by constituting so as not to have a cutting surface of the pulp material in an end part of the overlapping part of a container inner surface.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a food container made of pulp material, and more specifically, a food container made of cardboard made of lup material contains meat, fish, etc. The present invention relates to a food container in which liquid juice does not enter.

FIG. 1 shows a conventional food container. When the side walls 1a and 1b are erected, the side walls 1a and 1b and the short v-shaped folded piece 2 connected between the side walls 1c and 1b are erected together. The short v-shaped folded piece 2 is adhered to the surface of the side wall 1a. A portion longer than the v-shaped folded piece 2 on the side walls 1a and 1b has a problem that blood and juice are soaked from the cut surface 3 of the pulp material to make the appearance of the container dirty. Needless to say, no problem arises when the contents do not produce liquid juice such as blood.

This invention is made | formed in view of such a point, and it aims at providing the food storage container which solved the problem which infiltrates so that blood and juice may bleed, and makes the external appearance of a container dirty.

In order to achieve the above object, as a result of earnest research, the inventor has provided a folded portion at a portion above the folded piece of the side wall that is attached to the surface of the side wall longer than the folded piece, and folded the folded portion to return the side wall. By sticking to the surface, the cut surface does not appear on the surface, so that the problem of soaking in blood and juice so as to bleed does not occur, and the present invention has been achieved.

That is, the present invention is formed from a pulp material into a cardboard material, coated with a thermoplastic resin having a heat seal ability on the cardboard material, and formed with cutting portions that form side pieces at the four corners of the cardboard material, It has a folded piece connecting side pieces adjacent to the four corners, and the folded piece is formed shorter than both adjacent side parts, and is a portion above the folded piece on the side wall that is attached to the surface of the side wall longer than the folded piece. And the step of forming the overlapping portion of the side piece at the four corners by providing the folded portion to the surface of the side wall by folding the folded portion and attaching the pulp to the end of the overlapping portion on the inner surface of the container. It does not have a cut surface of the material.

It is preferable that the folded portion of the portion above the folded piece of the side wall is formed in a substantially rectangular shape (Claim 2). The folded portion of the side wall above the folded piece may be formed in a substantially triangular shape connected to the folded piece (Claim 3).

It is preferable that the pulp material is pulp alone or a mixture of pulp and other vegetable fiber materials (claim 4).

As described above, according to the present invention, the folded portion is provided at a portion above the folded piece of the side wall that is adhered to the surface of the side wall longer than the folded piece, and the folded portion is folded and adhered to the surface of the sidewall. As a result, the cut surface of the pulp material does not come out on the surface, so that it has a tremendous effect of solving the long-standing problem of infiltrating blood and juice so that the appearance of the container becomes dirty.

It is a partial expanded view which shows an example of the conventional food container. It is a partial expanded view which shows an example of the food container of this invention. It is a partial expanded view which shows the other example of the food container of this invention. It is a perspective view which shows an example of the metal mold | die which manufactures the food container used for this invention. It is a perspective view which shows the example of the food container of this invention.

1a, 1b, 1c, 1d ………… Sidewall
2 ……………………… Folding piece
3 ………………………… Cut surface of pulp material
4a, 4b ………………… Folding part
5 ………………………… Mold recess
6,6´ …………………… Rod 7 ……………………… U-shaped section 8 with a U-shaped cross section ……………………… Bent

Next, embodiments of the present invention will be described.

The present invention forms a food container from a pulp material. In order to form a food container from pulp or a material mainly composed of pulp, heat is formed from a pulp or a material mainly composed of pulp into a cardboard of a predetermined size and has a heat sealing ability on the back surface. What is necessary is just to heat-press the cardboard material which apply | coated the plastic resin and formed the cutting part which forms a side piece in the four corners of the said cardboard material with a pair of uneven | corrugated press molds. In order to press with a press die, the opposing side piece must be raised first. Instead of hot pressing with a mold, hot pressing may be performed by blowing hot air.

FIG. 4 shows an example of a mold used for this purpose, and rods 6 and 6 ′ are fixed to one opposing portion of the periphery of the mold recess 5. The side piece to be raised first may be placed on the rod 6, 6 '.

  FIG. 2 shows an embodiment of the present invention, in which a folded piece 2 is connected between side pieces 1a and 1b, and is above the folded piece 2 of the side piece 1a to be attached to the surface of the side piece 1a. A substantially rectangular folded portion 4a is formed in the portion. Even if the folded portion 4a is folded and pasted to the side piece 1a, the cut surface of the pulp material does not appear on the surface, so that there is no problem that blood or juice soaks up and the appearance of the container becomes dirty.

  FIG. 3 shows another embodiment of the present invention. The folding piece 2 is connected between the side pieces 1a and 1b, and the folding piece 2 of the side piece 1a is attached to the surface of the side piece 1a. A substantially triangular folded portion 4b is formed in the upper portion. Even if the folded portion 4b is folded and attached to the side piece 1a, the cut surface of the pulp material does not appear on the surface, so that there is no problem that the appearance of the container is made dirty by soaking in blood or juice.

  In order to produce a cardboard from a pulp material, a known method may be used. That is, what suspended the pulp material in water should just make a cardboard thing through a plowing process, a chopping process, and a drying process. The cardboard material obtained in this way is cut into the developed shape of the container or lid to be formed. Instead of virgin pulp, pulp made from old paper such as old newspaper can also be used.

  In the above embodiment, the folded portion is formed in a rectangle and a triangle, but the shape is not particularly limited as long as the folded portion can be formed.

  The step of coating the thermoplastic resin having the heat sealing ability may be before or after being cut into a developed shape. The thermoplastic resin should be coated on the back of the cardboard. The reason why the thermoplastic resin is coated is that it can be formed in a container with a mold and can prevent infiltration of moisture, blood, juice, etc. As the thermoplastic resin, it is particularly preferable to use polyethylene or polypropylene.

  The cardboard-like material thus formed is formed with cut portions for forming side pieces at the four corners. Then, a crease is formed at the boundary between the bottom surface and the side surface. The crease is preferably formed by a punching die.

  In order to form a food container with a pair of concave and convex heating press molds, a cardboard-like object is placed on the concave mold shown in FIG. 5, and one opposing side piece is more than the other opposing side piece. The food storage container 2 having a bowl-shaped section 7 having a U-shaped cross section shown in FIG. 5 is formed by first standing up and pressing and pressing from above with a convex mold to form a container and simultaneously heat-sealing the four corners. 'Can be manufactured in one step. The hook-like portion 7 is formed in a U-shaped cross section because, as shown in FIG. 5, a ring-shaped ridge 13 having a square cross section is provided on the outer periphery of the concave upper end of the concave mold. In FIG. 6, 3 is a cut surface located on the inner surface of the container.

  In the above embodiment, the bowl-shaped portion 7 is formed in a U-shaped cross section, but it is not particularly limited as long as it has a semicircular cross section, a triangular shape, or the like so long as a folded portion is formed.

  A bent portion 8 in the outer horizontal direction is continuously provided at the lower end of the bowl-shaped portion 7 having a U-shaped cross section. By providing the bent portion 8 in this way, the portion of the laminated thermoplastic resin film that protrudes from the container can be easily cut together with the bent portion 8.

  A crease is formed on the cardboard thus formed. The crease is preferably formed by a punching die. That is, at the bent part such as the boundary between the bottom surface and the side surface, the boundary between the side surface and the folded piece, a ridge is formed on the punching die, and a cardboard-like material is placed on this and pressed from above, so that Can be formed. Of course, the crease may be formed by other means.

  Although it does not specifically limit as a food storage container manufactured by the method of this invention, A tray, a universal container, etc. are mentioned as a suitable thing. Since the container manufactured as described above has no cut surface of the pulp material on the inner surface of the container, there is no possibility that blood such as meat, fish, and liver, moisture, etc. may infiltrate from here.

According to the invention, the pulp material is formed by providing a folded portion at a portion above the folded piece of the side wall that is adhered to the surface of the side wall that is longer than the folded piece and folding the folded portion to be adhered to the surface of the side wall. Since the cut surface does not appear on the surface, it solves the long-standing problem of making the appearance of the container dirty by infiltrating blood and juice so that its use is expected.

Claims (4)

Formed from a pulp material into a cardboard-like material, coated with a thermoplastic resin having a heat-sealability on the cardboard-like material, formed cut portions that form side pieces at the four corners of the cardboard-like material, and side surfaces adjacent to the four corners It has a fold piece to connect the pieces, the fold piece is formed shorter than the adjacent side portions, and a folded portion is provided in a portion above the side wall fold piece attached to the side wall surface longer than the fold piece. The folded portion of the pulp material is formed at the end portion of the overlapping portion of the inner surface of the container formed by the step of forming the overlapping portion of the side piece at the four corners by folding the folded portion and sticking it to the surface of the side wall. A food container characterized by not having. 2. The food container according to claim 1, wherein the folded portion of the side wall above the folded piece is formed in a substantially rectangular shape. 2. The food container according to claim 1, wherein the folded portion of the side wall above the folded piece is formed in a substantially triangular shape connected to the folded piece. The food container according to any one of claims 1 to 4, wherein the pulp material is a pulp alone or a mixture of pulp and another vegetable fiber material.

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