Wooden container and a process for manufacturing thereof

Abstract

A wooden container formed by a wooden sheet is provided. The wooden container (1) is formed by a ply wood sheet comprising two wooden sheets chosen from a large number of wooden sheets, one being an inferior sheet (6a) including at least one spoiled portion and another one being a superior sheet (6b) including no such spoiled portion. The inferior and superior sheets are laid with each other and glued mutually. The container comprising a bottom wall (2) and a peripheral wall (3) is formed inside with the superior sheet (6b) and outside with the inferior sheet (6a). Adhesion film (9) is formed between contacted surfaces of the sheets by lignin oozed from wood content. Supplementary adhesion may be added if necessary.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a wooden container such as tray and also to a process for manufacturing thereof wherein the container is formed by a plywood sheet comprising an inferior wooden sheet and a superior wooden sheet.BACKGROUND OF THE INVENTION[0002]It is known that a tray-like container for packing and selling food, fresh food such as fishes or vegetables for example, is formed and shaped by a foamed plastic sheet generally. The container is usually in white color, a film printed with a wood-grain pattern may be laminated on the plastic sheet in order to create a high grade appearance.[0003]Since the plastic container has a problem of waste treatment, it is desirable to spread wooden containers widely as possible which can be incinerated. In addition, wooden containers are excellent in hygroscopicity etc., they fit packing wet food. For this reason, a wooden container formed by a wooden thin plate is already proposed in prior art.[0004]A woode...

AI Technical Summary

Benefits of technology

[0012]The inferior sheet includes a spoiled portion, such as knot and crack, but it is located in outside, it does not cause trouble in the function of container. Moisture of wet food packed in the container does not leak outside, since the inside of container is formed with the superior sheet having no spoiled portion.

[0037]According to the present invention, the inferior and superior sheets are decreased in moisture in wood content by drying in advance of carrying out heating pressurization to the plywood sheet.

Problems solved by technology

On the contrary, when timber obtained from a thinner tree is sliced, many inferior sheets having spoiled portions such as knots and cracks and few superior sheets having no such spoiled portion are provided.

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