JPH0825319A - Fiber board and manufacture thereof - Google Patents

Abstract

PURPOSE:To obtain fiber board, which can be nailed as wood do. CONSTITUTION:Sheet-like vegetable fiber board is fed to a resin impregnating device 2 so as to be impregnated with self-crosslinking acrylate copolymer emulsion so as to be formed under heat and pressure with a forming press device 8 in order to produce fiber board. Since very hard resin film is produced in vegetable fiber, fiber board, which does not break even when nailed, is produced. Further, since fibers are interwiningly cured with each other, nails do not come out, resulting in being most suitable for building material. The board can be manufactured at a low cost and waste article can be easily disposed by incineration.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nailable synthetic building material and its manufacturing method.

[0002]

2. Description of the Related Art Conventionally, veneers and plywood are widely used as substitutes for natural wood because they are less expensive than natural wood.

[0003]

However, since the raw material for veneers and plywood is wood, substitutes still consume wood. Since it takes time to grow timber, it takes many years to recover it if it is cut down, and in recent years depletion of forest resources and environmental destruction have become problems.

On the other hand, plant fibers such as palm fiber, coconut fiber, hemp fiber, sugar cane fiber, hechima fiber, and bamboo fiber are less likely to be exhausted as a resource because the plant as a raw material thereof grows relatively quickly, and are inexpensive. The fiberboard manufactured from these materials is easily removed even when hit with a nail, and thus it is difficult to use as a building material and its use is limited.

An object of the present invention is to solve the above problems, to provide a low cost fiberboard which can be fixed with a nail, is lightweight, and is not easily exhausted as a resource, and a manufacturing method thereof.

[0006]

The fiber board of claim 1 of the present invention is obtained by impregnating a sheet-shaped plant fiber base material with a self-crosslinking acrylic ester copolymer emulsion and molding. The method of the present invention according to claim 2 is characterized in that a sheet-shaped plant fiber base material is impregnated with a self-crosslinking acrylic ester copolymer emulsion, and this base material is then heated and pressed to be molded. .

[0007]

[Function] The self-crosslinking acrylic acid ester copolymer emulsion has a good adhesive property with the plant fiber and has an effect of uniting the plant fiber together. The self-crosslinking acrylic ester copolymer emulsion has heat resistance, flexibility, film-forming property, and stickiness, and forms a very hard film on plant fibers.
It will be a building material that will not be destroyed by hitting nails. Moreover, the hardened base material made of vegetable fibers in which the fibers are intertwined with each other suppresses the pulling out of the nail like natural wood.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the drawings, but the present invention is not limited thereto.

FIG. 1 is a diagram showing a manufacturing process of a fiber board. First, the basis weight 1.0 to 8.0 kg / square meter base material 1 is put into the resin impregnation apparatus 2 of FIG. 2 to impregnate the resin.

As the material of the base material 1 to be used, in addition to the fiber raw material itself such as palm fiber, coconut fiber, oil palm fiber, hemp fiber, sugarcane fiber, hechima fiber, and bamboo fiber, a bag made from these It may be a recycled product of a fiber processed product such as a sheet or sheet. In the case of the fiber raw material itself such as palm, coconut fruit or hemp, the fiber raw material is first defibrated by a defibrating machine to give a felt-like nonwoven fabric. Palm and coconut fruits are crushed with a crusher, then crushed into pieces with a crusher before defibration. For the palm fruit, the outer shell of the shell part after removing the central copra is used. Each fiber has a length of 100 to 1,000 mm and a thickness of 0.2 to 1.5 mm,
These fibers are entangled in a non-oriented manner in the substrate. In the case of recycled products such as bags and sheets, they are cut to the specified size and cut into pieces with a basis weight of 1.0 to 2.0 kg / square meter.

A self-crosslinking acrylic ester copolymer emulsion is used as the molding resin, and the resin is impregnated in a weight ratio of 0.2 to 0.6 with respect to the fiber 1 and compressed. The self-crosslinking acrylic acid ester copolymer emulsion may be used as it is, or may be diluted with water or alcohol to an appropriate concentration. Furthermore, when a melamine resin of about 5 to 10% by weight is added to the self-crosslinking acrylic ester copolymer emulsion, heat resistance is improved and warpage of the fiber board can be prevented.

In the resin impregnating device 2, a plurality of pairs of upper and lower impregnated squeezing rolls 3 are installed inside and outside the resin dipping tank 4 at predetermined intervals. A self-crosslinking acrylic ester copolymer emulsion is poured into the resin dipping tank 4. Then, the strip-shaped substrate 1 is transferred while being compressed by the roll 3 at the right end of the drawing, and is supplied to the resin dipping tank 4. Here, the base material 1 is impregnated with resin and compressed. Next, the base material 1 is taken out from the resin dipping tank 4 and further compressed by the roll 3 at the left end of the drawing to squeeze the resin.

The resin impregnating device 2 may be spray-coated with high pressure air from both front and back surfaces of the base material 1 (not shown) instead of the type using the above-mentioned impregnated squeezing roll 3. When the impregnated squeezing roll is used, the base material is compressed, so that a molded base material having sufficient rigidity can be obtained. The amount of resin impregnated can be adjusted by adjusting the gap between the upper and lower rolls to be wide. Further, the strength of the substrate can be freely set by changing the amount of the solvent and adjusting the dilution ratio.

The substrate 1 impregnated with the resin in this way is dried in the drying furnace 5 in which the temperature inside the furnace is 100 ° C., washed in the cleaning device 6, preliminarily cut in the cutting device 7, and then in the molding press device. Then, it is hot pressed into a predetermined shape. At this time, the molding press device 8 has a pressing force of 10 to 50 kg / square centimeter and a temperature of 180 to 220 ° C. for 1.5 to 10 minutes.
The base material 1 is hot pressed.

The fiberboard manufactured as described above has a length of 18
It is a rectangle with a width of 0 to 240 cm and a width of 90 to 120 cm, a substrate density of about 500 kg / square meter, and a plate thickness of 3 to 15 mm.

[0016]

In summary, the plant fibers such as palm, coconut, and hemp used for the base material of the present invention are porous, so that they are well impregnated with resin and have a particularly high strength. In addition, since it is easy to impregnate with resin, it is easy to manufacture, and waste products can be easily incinerated. In addition, since the raw materials of these plant fibers are abundant and can be cultivated, the resources are almost limitless and the manufacturing cost is low. Furthermore, since the self-crosslinking acrylic acid ester copolymer emulsion is impregnated and cured, the strength is increased, and further, it can be fixed with a nail and can be widely used as a building material.

[Brief description of drawings]

FIG. 1 is a manufacturing process diagram of a fiber board.

FIG. 2 is an overall side view of a resin impregnation device.

[Explanation of symbols]

 1 substrate 2 resin impregnation device 8 molding press device

Claims (2)

[Claims] 1. A fiber board obtained by impregnating a sheet-shaped plant fiber base material with a self-crosslinking acrylic acid ester copolymer emulsion and molding. 2. A method for producing a fiber board, which comprises impregnating a sheet-shaped base material of a plant fiber with a self-crosslinking acrylic ester copolymer emulsion, and then heating and pressing the base material to form the fiber board. .