JPH07116014A - Food container - Google Patents

Abstract

PURPOSE:To prevent absorption of water content of food or the like and transfer of smell of a wood material to foods by forming a food container of which side walls are fitted to the circumferential part of bottom piece and of which upper part is open while side wall is made of a water-impermeable resin layer on the substantially whole surface of the inner circumferential face of a wooden thin plate member. CONSTITUTION:A food container A of which upper part is open is composed of side wall 2 erected at the four sides as well as a bottom part 1 of which front face made of water-impermeable paper material having a resin layer on its surface. The side wall 2 is bent angularly with cut grooves 9 formed at the inner sides of a wooden thin plate member 3, and ends are connected by a stapler 7 or adhesive. At the inner face of the thin plate 2 a water-impermeable resin layer 4 is formed while at the outer circumferential face a resin layer 4a is formed. In grooves arranged at the lower part of the inner face the four sides of the bottom part 1 are fitted. It is thus possible to prevent absorption of water content from foods such as rice and the like and prevent transfer of smell of wood material to the foods. Furthermore it is possible to wash the container easily after usage and dispose and burn it easily upon non-use.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disposable food container mainly used for folded lunch boxes and the like,
More specifically, the present invention relates to a technique that uses a wooden thin plate material to enhance the texture of a food container and facilitates incineration, while avoiding the problems that occur when the side wall is made of a wooden thin plate material.

[0002]

2. Description of the Related Art Conventionally, a disposable food container used for bent lunches such as bentoes sold at stations, lunches for lunch and catering lunches, is used as a food container on a side wall and a bottom surface piece of its periphery. It was made of a thin wooden material that retains strength and texture to the extent that it can be used for food and also has sterilizing power.

[0003]

However, a large amount of food containers can be packed in a short time by rapidly cooling the cooked rice to room temperature, for example, by a machine such as a vacuum cooling device and the like. However, in the packed rice that touches the side wall of the container, water is absorbed by the side wall of the thin wooden plate, and the absorbed rice shrinks tightly, significantly reducing the taste. There was a problem of doing.

Therefore, styrene foam sidewalls have come to be used. Styrofoam thickness from 3.5 to
By setting the thickness to about 5.0 mm, it is possible to provide a food container that does not absorb water and has a wood-like texture while having sufficient strength to withstand the application, and exhibited its function. However, as a result of the rapid growth resulting from the expansion of domestic demand, plastic dust, which has explosively increased, has been highlighted as a subject of global environmental conservation. It has been pointed out that the furnace is damaged due to the high temperature generated during incineration, or soot is generated due to incomplete combustion that requires a large amount of air during incineration, and it goes without saying that foamed plastic is included in the plastic. is there.

Therefore, there has been a need for a container made of a material which has the strength required for a bento container, does not absorb the moisture of the food to be packed therein, and does not hinder the above local environment. The present invention provides such a food container.

[0006]

The present invention is a food container formed by attaching a side wall 2 to a peripheral portion of a bottom piece 1 and opening the upper side thereof, and the side wall 2 is made of a wooden thin plate material 3. The water impermeable resin layer 4 is formed on substantially the entire inner peripheral surface of the container. The bottom piece 1 is characterized in that the resin layer 4 is formed on substantially the entire inner surface of the container of the paper material 5.

Further, the present invention is characterized in that a water impermeable resin film layer 4a is formed on substantially the entire outer peripheral surface of the container of the thin wooden plate material 3.

[0008]

By using the wooden thin plate material 3 for the side wall 2, the resin layer 4 is formed while maintaining the wooden texture while having a sufficient strength required for a container. It is possible to block the original water absorption of.
Further, the resin layer 4 has a thickness of 20 to 80 μm and has a thickness of 3.5.
It is about 1/10 of the amount of resin of styrene foam having a thickness of ~ 8.0 mm, and no high temperature and generation of soot are observed during incineration.

Further, since the bottom piece 1 is made of the paper material 5, the bottom piece 1 is not cracked or broken. The resin layer 4 prevents the bottom piece 1 from absorbing water, and can be easily incinerated. Further, a non-water-permeable resin film layer 4a is formed on substantially the entire outer peripheral surface of the wooden thin plate 3, and the wooden thin plate 3
The strength of the corner portion can be significantly increased, and the corner portion can be easily bent without the need to hydrate the conventional corner portion.

[0010]

1 shows a perspective view of a food container A, in which a bottom piece 1 is fitted into a fitting groove 6 formed continuously on a strip-shaped side wall 2.
The outer peripheral portion of the side wall 2 is fitted into the side wall 2 while maintaining such a coupled state.
A box-shaped food container A having an opening at the top is formed by stopping both ends of the container with a stapler 7. Instead of a stapler, it may be stopped with a hot melt adhesive, an instant adhesive, or a bolt. Such a food container A can be easily incinerated, and deterioration of the cooked rice and side dishes can be avoided. The configuration will be described in detail below.

On the side wall 2, a resin layer 4 having water impermeability and water repellency is formed on substantially the entire inner peripheral surface of the container of a thin wooden plate material 3. As the thin plate material 3, a soft and easy-to-bend material such as a Shinano tree is used, and the thickness is 2 mm to 3
Although it is about mm, it may be thicker than this. Resin layer 4
In order to form the thin plate material 3 on the inner peripheral surface of the container, a resin film may be laminated on the thin plate material 3 or a resin solution may be coated on the thin plate material 3. In the case of laminating, a hot melt type or emulsion type adhesive is used. As the resin layer 4, polystyrene having heat resistance, acid resistance and oil resistance is preferable, but a general-purpose resin such as polyethylene and polypropylene having a low melting point and easily incinerated even in a simple incinerator can be adopted. , Other may be used. And, even if polystyrene having acid resistance and oil resistance is adopted, it may be able to withstand the oxidative action by the fried tempura or lemon. A resin film layer 4a having a film-like strength is laminated on the outer surface of the side wall 2. The resin layer 4 and the resin film layer 4a inside and outside are transparent or semi-transparent, and
The grain of the thin plate material 3 can be seen through and the texture of the tree can be fully felt. Then, the resin layer 4 on the inner surface
The thickness of the resin film layer 4a on the outer surface is preferably about 40 to 100 μm. By the way, as shown in FIG. 3, a decorative paper 11 having a wood pattern or various patterns printed thereon is attached to the outer surface of the side wall 2, and the resin film layer 4a is laminated on the outer side of the decorative paper 11. Is also good.

At the corner portion of the side wall 2, one or a plurality of cut grooves 9 ... Are formed so that bending can be easily performed. The kerf 9 is approximately U-shaped, approximately V-shaped
Either letter shape is acceptable. The cutting grooves 9 ... And the fitting grooves 6 are cut with a cutting tool such as a saw or a cutter, and the wood is exposed in the cutting grooves 9 and the fitting grooves 6. A container in which the peripheral portion of the bottom surface piece 1 is adhered to the lower end of the side wall 2 without providing the fitting groove 6 in the side wall 2 may be used. Also,
The bottom piece 1 also has a resin layer 4 formed on substantially the entire inner surface of the container of the paper material 5 by means similar to the above. Even in such a case, the resin film layer 4a may be formed. The lid 8 is also a paper material 5 on which the resin layer 4 is similarly formed.
Even in such a case, the resin film layer 4a may be formed.

In such a food container A, the wood appears on the upper end surface of the side wall 2 as it is, and the grain of the thin plate material 3 can be seen through the resin layer 4 and the resin film layer 4a. When the lid 8 of the food container A on which rice and side dishes are placed is taken out, the texture of wood is felt, and the flavor and taste can be felt compared to the resin container. In this way, while taking advantage of the goodness of wood, the side wall 2
Water impermeable resin layer 4 formed on substantially the entire inner peripheral surface of the container
The water content of the food, especially the rice, which has been prepared in step 1, prevents the active water absorption action caused by the contact with the side wall 2 of the wood. In this way, the rice attached to the side wall 2 can be fully enjoyed by avoiding the rice being hardly contracted by water absorption. And, the adverse effect on the side dish due to the water absorption is also avoided. By the way, the resin film layer 4a is also formed on the outer surface of the side wall 2.
Is formed, the strength of the wooden thin plate member 3, particularly the strength of the corner portion is significantly increased, and the restriction of the depth of the kerf 9 for bending is reduced. Thus, unlike the conventional case, the corner portion can be bent without hydrating the corner portion, and the drying step in the case of hydrating the corner portion is omitted, resulting in higher productivity. Then, even when the bento is kept in the refrigerator, the dew condensation formed on the side wall is absorbed in the side wall, and in the embodiment shown in FIG. 3, the decorative paper 11 is prevented from peeling off and the deterioration of the appearance is also avoided. . Further, it is possible to prevent the dirt from conspicuously appearing along the grain of the inner surface of the wooden side wall 2 due to the dew condensation, and not to be a hotbed of various germs.

The bottom surface piece 1 has the resin layer 4 formed on substantially the entire inner surface of the container of the paper material 5, so that the bottom surface piece 1 does not crack or break. The resin layer 4 prevents the bottom piece 1 of the paper material 5 from absorbing water while facilitating disposal such as incineration, so that the moisture of the rice that is in contact with the bottom piece 1 is absorbed and shrinks firmly. Therefore, the taste of the rice is not impaired, and the bottom piece 1 of the paper material 5 does not swell due to water absorption and the bottom does not easily come off.

Although the present invention is applied to the lunch box in the embodiment, the present invention may be applied to any other food container A.

[0016]

As described above, the present invention is a food container formed by attaching a side wall to a peripheral portion of a bottom piece and closing the upper side, the side wall being an inner peripheral surface of a wooden thin plate container. Since a non-water-permeable resin layer is formed on almost the entire surface of the rice, it is possible to prevent the active water absorption effect of the moisture of the arranged food, especially the rice, coming into direct contact with the side wall of the wood, and as a result, the rice absorbs water. It can be prevented from shrinking firmly and can be fully enjoyed without the smell of wood being transferred to the rice on the side wall.

The same applies to the side dish, and in the side dish with a further color, the color is not soaked and spread on the side wall, and the container has a very clean feeling. Also, with respect to the bottom piece, since the resin layer is formed on almost the entire inner surface of the container of paper material, the same effect as that of the side wall can be obtained, and further, the bottom piece is swollen by water absorption and the bottom easily comes off. It also has the advantage of never happening.

Further, since the water-impermeable resin film layer is formed on substantially the entire outer peripheral surface of the wooden thin plate container, it is possible to prevent dirt from seeping in when handling and to keep it clean only by wiping. . The strength of the bent corners of the thin wooden plate is greatly increased, and the corners can be bent without the need to hydrate as in the past.As a result, the drying process when hydrated can be omitted and productivity is increased. be able to.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention.

2A is a partially developed front view of a side wall, FIG. 2B is a sectional view, FIG. 2C is a sectional view of a bottom piece, and FIG. 2D is a sectional view of a lid.

FIG. 3 is a developed sectional view of a side wall of another embodiment.

[Explanation of symbols]

 1 Bottom piece 2 Side wall 3 Thin plate material 4 Resin layer 4a Resin film layer 5 Paper material

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] January 17, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction content]

Therefore, styrene foam sidewalls have come to be used. Styrofoam thickness from 3.5 to
By setting the thickness to about 5.0 mm, it is possible to provide a food container that does not absorb water and has a wood-like texture while having sufficient strength to withstand the application, and exhibited its function. However, as a result of the rapid growth resulting from the expansion of domestic demand, plastic dust, which has explosively increased, has been highlighted as a subject of global environmental conservation. It has been pointed out that the furnace is damaged due to the high temperature generated during incineration, or soot is generated due to incomplete combustion that requires a large amount of air during incineration, and it goes without saying that Styrofoam is included in the plastic. .

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

[0010]

1 shows a perspective view of a food container A, in which a bottom piece 1 is fitted into a fitting groove 6 formed continuously on a strip-shaped side wall 2.
The outer peripheral portion of the side wall 2 is fitted into the side wall 2 while maintaining such a coupled state.
A box-shaped food container A having an opening at the top is formed by stopping both ends of the container with a stapler 7. Instead of a stapler, it may be stopped with a hot melt adhesive, an instant adhesive, a bolt or the like. Such a food container A can be easily incinerated, and deterioration of the cooked rice and side dishes can be avoided. The configuration will be described in detail below.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction content]

On the side wall 2, a resin layer 4 having water impermeability and water repellency is formed on substantially the entire inner peripheral surface of the container of a thin wooden plate material 3. As the thin plate material 3, a soft and easy-to-bend material such as a Shinano tree is used, and the thickness is 2 mm to 3
Although it is about mm, it may be thicker than this. Resin layer 4
In order to form the thin plate material 3 on the inner peripheral surface of the container, a resin film may be laminated on the thin plate material 3 or a resin solution may be coated on the thin plate material 3. In the case of laminating, a hot melt type or emulsion type adhesive is used. As the resin layer 4, polystyrene having heat resistance, acid resistance and oil resistance is preferable, but a general-purpose resin such as polyethylene or polypropylene having a low melting point and easily incinerated even in a simple incinerator can be adopted. , Other may be used. And, even if polystyrene having acid resistance and oil resistance is adopted, it may be able to withstand the oxidative action by the fried tempura or lemon. A resin film layer 4a having a film-like strength is laminated on the outer surface of the side wall 2. The resin layer 4 and the resin film layer 4a inside and outside are transparent or semi-transparent, and
The grain of the thin plate material 3 can be seen through and the texture of the tree can be fully felt. Then, the resin layer 4 on the inner surface
Is preferably about 20 to 40 μm, and the thickness of the resin film layer 4a on the outer surface is about 40 to 100 μm. By the way, as shown in FIG. 3, the outer surface of the side wall 2 has a wood pattern,
Alternatively, the decorative paper 11 on which various patterns are printed may be attached, and the resin film layer 4a may be laminated on the outer side of the decorative paper 11.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction content]

In such a food container A, the wood appears on the upper end surface of the side wall 2 as it is, and the grain of the thin plate material 3 can be seen through the resin layer 4 and the resin film layer 4a. When the lid 8 of the food container A on which rice and side dishes are placed is taken out, the texture of wood is felt, and the flavor and taste can be felt compared to the resin container. In this way, while taking advantage of the goodness of wood, the side wall 2
Water impermeable resin layer 4 formed on substantially the entire inner peripheral surface of the container
The water content of the food, especially the rice, which has been prepared in step 1, prevents the active water absorption action caused by the contact with the side wall 2 of the wood. In this way, the rice attached to the side wall 2 can be fully enjoyed by avoiding the rice being hardly contracted by water absorption. And, the adverse effect on the side dish due to the water absorption is also avoided. By the way, the resin film layer 4a is also formed on the outer surface of the side wall 2.
Is formed, the strength of the wooden thin plate member 3, particularly the strength of the corner portion is significantly increased, and the restriction on the depth and width of the kerf 9 for bending is reduced. Thus, unlike the conventional case, the corner portion can be bent without hydrating the corner portion, and the drying step when hydrating the corner portion is omitted can be omitted, resulting in higher productivity. When the lunch box is kept in the refrigerator, the dew condensation on the side wall is absorbed in the side wall, and in the embodiment shown in FIG. 3, the decorative paper 11 is prevented from peeling off, and the deterioration of the appearance is also avoided. . Then, it is possible to prevent the dirt from conspicuously appearing along the grain of the inner surface of the wooden side wall 2 due to the dew condensation, and not to be a hotbed of various germs.

Claims (3)

[Claims] 1. A food container formed by attaching a side wall to a peripheral portion of a bottom piece and opening the upper side thereof, wherein the side wall is impermeable to water on substantially the entire inner peripheral surface of the container made of a thin wooden plate material. A food container comprising the resin layer of 1. 2. The food container according to claim 1, wherein the bottom piece has a resin layer formed on substantially the entire inner surface of the container made of a paper material. 3. The food container according to claim 1, wherein a water-impermeable resin film layer is formed on substantially the entire outer peripheral surface of the container made of a wooden thin plate material.