JP2001031048A - Disposable container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shut off the odor of a wood when a container is used for foods or cooking, positively making use of the advantages of the wood, to ensure the environmental protection during the disposal, and to make an effective use of the wooden resources such as thinnings by providing a biodegradable plastic layer on a face side, a reverse side or face and reverse sides of a wooden sheet body. SOLUTION: A biodegradable plastic layer 2 is provided on a surface of a body 1 formed by forming a wooden sheet in a dish-like shape. The biodegradable plastic layer 2 may be provided on a reverse side of the body 1, or both face and reverse sides thereof. The body is formed by steaming the wooden sheet with the steam high in temperature and pressure, and forming it by a forming press, or by drying the wooden sheet while pressing it in the forming press. The biodegradable plastic layer 2 is formed by placing a sheet-like biodegradable plastic on a specified part of the body 1, and covering it thereon through the thermal bonding. The biodegradable plastic consists of aliphatic polyester or this polyester with starch blended therein.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container mainly made of wood, and more particularly to a disposable container.

[0002]

2. Description of the Related Art Conventionally, containers for simple packaging of foodstuffs and disposable containers used for hiking and the like are made of synthetic resin or molded wooden material.

[0003]

Among the above-mentioned conventional disposable containers, a synthetic resin disposable container is easy to manufacture and is convenient for mass consumption, but disposal treatment after use has recently become a problem. As is well known, there is a demand for a material that can replace synthetic resin.

Although wood can be discarded by incineration, it requires a considerable thickness to maintain its shape and obtain the necessary strength. Considering that it is disposable, it is usually thinned wood. For example, a method of forming a thin plywood sheet made of a plurality of useless thin sheets using a plywood obtained by superposing a plurality of such thin sheets has been considered.

[0005] As described above, the problem of dioxin during incineration of synthetic resin or the problem of molding efficiency, material consumption and incineration amount has been raised in the case of wooden materials due to thick plywood.

[0006] Therefore, the present invention is to provide a disposable container which is made of wood as a main raw material, has sufficient strength even with a thin plate, and has no problem in disposal.

[0007]

The disposable container according to the present invention is characterized in that a wooden thin plate body is provided with a biodegradable plastic layer on the front surface, the back surface, or the front and back surfaces. Further, the wooden thin plate body may be a plywood using a biodegradable plastic layer as an adhesive. Further, a plywood molded using a biodegradable plastic layer as an adhesive may be used as a disposable container.

[0008] By applying a biodegradable plastic layer to the wooden thin plate main body, the characteristics of the plastic are used to maintain and fix the molding of the wooden thin plate main body, to exert an action of supplementing the strength, and to act as an adhesive. Play. And since the surface with the biodegradable plastic layer covers the wooden surface, applying it to the surface can prevent the smell of wood from transferring to the food to be placed, and applying it only to the back surface allows the surface to keep the wooden surface as it is It works.

Furthermore, when biodegradable plastic is disposed of in soil, it is decomposed by microorganisms and returns to nature, and is decomposed without generating high heat or toxic gas. It can be disposed of by incineration and burns at a low temperature, and the gas is harmless.

[0010]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional front view showing an embodiment of the present invention, in which a biodegradable plastic layer 2 is applied to the surface of a main body 1 formed by shaping a wooden thin plate into a dish shape. The biodegradable plastic layer 2 may be provided on the back surface of the main body 1 (FIG. 2) or on both the front and back surfaces.

The wooden thin plate constituting the main body may be a single plate or a plywood. The main body is formed by steaming a thin wooden plate with high-temperature and high-pressure steam, forming the main body with a forming press, and drying the wooden thin plate while pressing it with the forming press. Then, the biodegradable plastic layer 2 is applied to a predetermined portion of the main body 1 with a sheet-shaped biodegradable plastic,
It can be provided by heat fusion or the like.

The biodegradable plastic is made from aliphatic polyester or a blend of the polyester and starch. Polylactic acid for aliphatic polyester,
There are polycaprolactone, polybutylene succinate, polyhydroxybutyric acid, polybutylene adipate, and the like. In the present invention, a lactic acid-based resin having tensile strength, elasticity, and transparency is preferable.

FIG. 4 is a cross-sectional view showing an embodiment in which the biodegradable plastic layer 2 is used as an adhesive. The biodegradable plastic molded into a sheet or a powder is heated and melted. When sandwiched between the veneers 3 and 3, the biodegradable plastic is solidified as the temperature of the biodegradable plastic decreases and has an adhesive action. When using powder, wood flour may be mixed.

[0014]

As described above, according to the present invention, a disposable container is constructed using wood and biodegradable plastic.
Both raw materials are decomposed in the soil and returned to nature, so that the waste treatment conforms to environmental preservation, and has the effect of being able to treat at low temperatures even if incinerated.

Since the biodegradable plastic layer supplements the maintenance and strength of the wooden body, the wooden body can be made of a thin plate, so that the material can be effectively used and the efficiency of post-use treatment can be improved. Applying a degradable plastic layer,
If the plywood of the wooden body is made of a biodegradable plastic as an adhesive, the effect can be further enhanced.

Furthermore, if a biodegradable plastic layer is selectively applied to the front surface or the back surface, it is possible to positively prevent the smell of wood or use the characteristics of wood in relation to foods and dishes.

As described above, the present invention solves the problem of disposing of disposable containers, and at the same time, has an effect of promoting the effective use of tree resources such as thinned wood.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view showing an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view showing another embodiment of the present invention.

FIG. 3 is a partial cross-sectional view showing another embodiment of the present invention.

FIG. 4 is a partial sectional view showing an embodiment of a thin wooden plate.

[Explanation of symbols]

 1 wooden thin plate body 2 biodegradable plastic layer 3 veneer

Claims (5)

[Claims] 1. A disposable container in which a biodegradable plastic layer is applied to the surface of a thin wooden plate body. 2. A disposable container in which a biodegradable plastic layer is applied to the back of a thin wooden plate body. 3. A disposable container in which a biodegradable plastic layer is applied to the front and back surfaces of a wooden thin plate main body. 4. A disposable container formed by molding a thin wooden plate polymerized using a biodegradable plastic layer as an adhesive. 5. The disposable container according to claim 1, wherein the wooden thin plate body is the container according to claim 4.