WO1997045332A1

WO1997045332A1 - Method for making bamboo veneer container and container thereof

Info

Publication number: WO1997045332A1
Application number: PCT/CN1996/000112
Authority: WO
Inventors: Jejan Carlos
Original assignee: Jejan Carlos
Priority date: 1996-05-24
Filing date: 1996-12-20
Publication date: 1997-12-04
Also published as: CN2247637Y; AU1188497A

Abstract

A method for making bamboo container comprises the steps of cooking the green bamboo trunk to soften it, peeling off a veneer along the outer surface of the bamboo trunk, binding at least two veneer sheets, which grain directions of adjacent two-ply veneers are crossed each other, to form the laminated bamboo plywood member, squeezing said laminated bamboo plywood member and forming a container. This simple, economic and low cost method can be used for mass production. The invention further contemplates a container formed thereof with high strength and low cost. The container can be used in various fields, especially available as a disposable food container.

Description

Manufacturing method of bamboo container and manufactured container

The present invention relates to a method for manufacturing a container, and particularly to a method for manufacturing a bamboo container, and a bamboo container made by the method.

Background technique

At present, most of the food containers on the market, especially disposable food containers, are foamed PS containers. Such containers are widely used for their advantages such as convenient use, low price, and convenient for mass production. However, after such containers are used, It is difficult to degrade naturally, has become a white pollution, and seriously pollutes the natural environment. Therefore, there is an urgent need for a container made of a naturally degradable material.

As is known to all, Meng Zongzhu (commonly known as Moso bamboo, Phoebe bamboo, and Ma bamboo) is rich in nature and is also very easy to plant artificially. In the past, it has been used as a material for making containers. Containers made of bamboo have the advantage of being non-toxic and can be naturally degraded in the natural world without causing pollution to the environment. In the existing process for manufacturing bamboo containers, the production steps are usually as follows: material preparation, that is, the bamboo is stripped into bamboo strips and the inner and outer bamboo skins and slubs are removed; weaving, that is, the bamboo strips are manually woven into a container shape in the shape of a cross Bonding, that is, using non-toxic glutinous rice glue to glue and cure the woven container for 1-5 minutes. However, the above-mentioned production method has the following disadvantages: The bamboo strips need to be woven together by hand, not only the uneven surface of the container after being made; the bamboo skin and bamboo knots need to be removed when preparing the materials, and the raw materials are wasted; It will lose adhesion and cause leakage, as well as long glue time. These shortcomings of the prior art result in low production efficiency and high cost of bamboo containers, which cannot tolerate high temperatures, so it is difficult to widely use them in various occasions, and it is not suitable for use as disposable containers.

In Japanese Patent Application No. 218495 invented by Qinggang Gao Min, there is also disclosed a method for manufacturing a container such as a plate from bamboo material, in which the bamboo material is first cut and split into many elongated bamboo strips in the axial direction. Then, these bamboo strips are glued together to form a laminated bamboo board, and then the laminated bamboo board is cut into many thin bamboo pieces, and finally the thin bamboo pieces are made into a plate by pressing, cutting and bonding. Although no weaving step is required in this method, the process of producing laminated bamboo boards is long and it is not easy to mass-produce them; moreover, the laminated boards are cut into thin slices to increase the cost. In addition, The lamination of the laminated sheet is not good, and it is easy to break at the corners of the container, and the laminated joint is also easy to crack and deform after drying. Therefore, it still cannot be widely used.

Disclosure of invention

In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a method for manufacturing a bamboo container. By using the method, mass production can be achieved with high production efficiency and low cost.

The above object of the present invention is mainly achieved by the following steps:

1 · Cut the raw bamboo of required size;

2 · Steaming and softening raw bamboo; 3 · peel the raw bamboo after cooking into thin bamboo chips along the circumferential direction, the thickness of the bamboo chips is 0.2-0.8 mm; 4 · glue at least two or more (including two) thin bamboo chips together, and make each The fibers of two adjacent layers are at an angle to each other;

5 · Laminate the bamboo sheet into a container shape;

6. Repair the burr of the formed container;

Still another object of the present invention is to provide a bamboo container made by the above method. The container has low cost, smooth surface, high strength at high temperature, and is non-toxic and pollution-free to people and the natural environment.

To this end, the present invention provides a bamboo container, the container is at least two layers of thin bamboo flakes glued, pressed, and the fibers of the thin bamboo flakes of each layer at an angle to each other.

Compared with the method of manufacturing bamboo containers in the prior art, the method of the present invention directly peels the raw bamboo into thin bamboo chips, thereby saving raw materials and simplifying the process; and making each adjacent two layers of fibers angled At least two layers of thin bamboo sheets are glued together, and then pressed into a container, which not only saves the Γ weaving process, but also has a strong laminated sheet strength. The finished container can withstand high temperature, no cracking and high strength. . Therefore, the manufacturing method and the manufactured container of the present invention can realize mass production, low cost, and high strength, and thus can be widely used in various occasions, especially because of low cost, and can be used as disposable food containers.

Brief description of the drawings

In order to further explain the features and advantages of the present invention, the following describes in more detail with reference to the embodiments shown in the accompanying drawings. among them:

1 is a flowchart of a preferred embodiment of a method for manufacturing a bamboo container according to the present invention;

2 is a schematic diagram of an embodiment of a bamboo container of the present invention;

Fig. 3 is a cross-sectional view taken along the line A-A of the container shown in Fig. 2.

The best way to implement the invention

Please refer to FIG. 1, which shows a preferred embodiment of a method for manufacturing a bamboo container according to the present invention. This method embodiment includes the following steps:

1. Select bamboo as raw material. The type of bamboo is Mengzong bamboo (such as Moso bamboo, Phoebe bamboo, and Ma bamboo). The thickness of the selected raw bamboo is more than 10 mm. It is best to cut the raw bamboo according to the required size.

2. Cooking the raw bamboo cuts, the cooking time is about 60-90 minutes; after cooking, the raw bamboos are softened, which facilitates the subsequent peeling into thin slices. In addition, through the cooking process, the sugar and starch in the raw bamboos can also be cooked. The removal of quality and other impurities not only makes the finished container insect-proof and mildew-proof, but also solves the problem that bamboo food containers cannot be insecticide-proofed with a simple process.

3. The cooked raw bamboo is peeled into thin bamboo slices while hot, and the peeling is performed along the circumferential direction; the thickness of the bamboo slices is about ϋ · 2-0 · 8 mm, so that the raw bamboo can be fully utilized, and the raw materials are saved most. lower the cost.

⁴ -Cut the thin bamboo strips to the required size according to the size of the container to be made.

5 · In order to enhance the ability to prevent insects and mildew, thin bamboo chips can also be dried and carbonized.

6. Glue at least two layers of thin bamboo pieces together with each adjacent two layers of fibers at an angle to each other. The time is about 30-60 seconds; when the thin bamboo flakes are glued to contain three layers, and the fibers of each of the flakes form an angle of 90 ° with each other, the tension and stress reach the optimal equilibrium point, and the toughness and Best elasticity and easy deformation.

7. In order to obtain a smoother surface, the thin bamboo sheet can also be sanded.

8. Extrude the thin bamboo sheet into the desired container shape. The extrusion time is about 30-60 seconds. 9.Finish the burr of the container after molding.

10. Depending on the contents (such as wet items), the surface of the container can be spray-painted to enhance its impermeability.

It can be known from the above-mentioned implementation method that the method of the present invention directly strips the raw bamboo into bamboo chips, and can completely use the raw bamboo, thus saving raw materials, low cost, and simple process; at the same time, at least two layers are thin The bamboo pieces are glued together in such a way that every two adjacent layers of fibers form an angle with each other, so they have good toughness, elasticity, good molding effect, and high strength of the container made. In short, the method of the invention can achieve mass production. , Low cost, high strength of the container made, so it can be widely used in various occasions, especially as a disposable food container.

Please refer to FIG. 2 and FIG. 3 again, which show a bamboo container made by the method of the present invention. As shown in the figure, the container 1 is made of three layers of thin bamboo chips la, lb, lc through an adhesive glue and pressed by an extrusion molding device; in particular, the fibers of each layer of thin bamboo chips are glued during gluing. The directions are set at an angle with each other, so that the glued laminate has good toughness, elasticity, and good molding effect. In this embodiment, the fibers of each thin bamboo sheet form a 90 ° angle with each other. Best performance, high strength of the container

Of course, the foregoing merely describes the characteristics and advantages of the manufacturing method and the container of the present invention in combination with the preferred embodiments, and these embodiments have no limiting effect on the present invention. Those skilled in the art can easily recognize that according to the present invention, The basic concept of the invention may also make various changes to the above embodiments. For example, the number of thin bamboo sheets used may be four or more, and the fiber direction of the thin bamboo sheets may be at any acute angle. However, it is easy to understand that, Without departing from the basic idea of the invention, these possible variations will fall within the scope of the claims appended hereto.

Claims

1. A method for manufacturing a bamboo container, comprising making raw bamboo into thin bamboo pieces, gluing at least two layers of thin bamboo pieces together, and extruding the glued thin bamboo pieces into a container, which is characterized by comprising: The following steps: a- Select bamboo as raw material, intercept the original bamboo in the required size;

b- cooking softened intercepted raw bamboo;

c. The raw bamboo after cooking is peeled into thin bamboo slices along the right circumference while hot;

d- Cut the processed thin bamboo slice into the required size according to the size of the container to be made.

e. At least two layers of thin bamboo pieces are glued together in a manner that the fibers are angled to each other, and the glue time is about 30-60 seconds;

f- Extrude the thin bamboo sheet into the desired container shape.

g- Trimmed container burrs.

2- The method according to claim 1, further comprising drying and carbonizing the thin bamboo sheet between steps d and e.

3. The method according to claim 1 or 2, further comprising a step of sanding the thin bamboo sheet between steps e and f.

4. The method according to claim 1, further comprising spray-painting the surface of the container after step g.

5-The method according to claim 3, further comprising spray-painting the surface of the container after step g.

6 · A kind of bamboo container, characterized in that the container is glued and pressed by at least two layers of thin bamboo pieces, and the fibers of the two adjacent thin bamboo pieces are at an angle to each other,

The container according to claim 6, wherein the container is composed of three layers of thin bamboo pieces.

8. The container according to claim 6 or 7, characterized in that the fibers of the thin bamboo flakes in each layer of the container form a 90 angle with each other.