JP4255097B2 - Manufacturing method of fiber board - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a fiber board.
[0002]
[Prior art]
As one type of fiber board, for example, as shown in Japanese Patent Application Laid-Open No. 2000-127117, a non-thermoplastic fiber or a fiber layer such as a web, a fleece or a mat mainly composed of the same fiber is used. There are fiber boards that are formed by compression in the state. This type of fiber board is a fiber board using biodegradable fibers such as natural fibers and non-thermoplastic chemical fibers as non-thermoplastic fibers, and when used and discarded, it is buried in the soil, Alternatively, it is intended to be actively biodegraded and decomposed.
[0003]
Therefore, in order to manufacture the fiber board, a method of forming a board by compressing a non-thermoplastic fiber or a fiber layer such as a web, fleece, or mat mainly composed of the fiber with a binder interposed therebetween is adopted. In addition, as the binder, a binder component (binder solution) in which a binder component soluble in a solvent, for example, acetate, is dissolved in acetone, which is the solvent, is used.
[0004]
The binder solution is used by being applied to the upper surface of the fiber layer, and the fiber layer is further placed on the fiber layer having the binder solution applied to the upper surface, and the applied binder solution is used as two layers of fibers. Intervene between layers. In this state, the two fiber layers are heated and compressed by hot pressing or the like to form a fiber board. During this time, the binder solution evaporates the solvent, and the binder component adheres the fibers constituting the fiber layer to each other. The fiber board is formed by functioning as much as possible.
[0005]
[Problems to be solved by the invention]
By the way, when the manufacturing method is adopted, since the binder solution is a solution having a considerably high viscosity, the binder solution cannot be sprayed with a spray gun or the like, and the binder solution is applied to the upper surface of the fiber layer. , Troublesome application work such as hand painting work must be done. Further, since the binder solution has high viscosity but fluidity, the binder solution interposed between the two fiber layers still retains fluidity, and when the fiber layer is compressed, the binder component is There is a problem that it is difficult to manufacture a fiber board with uniform strength because it is pushed out to the surface and hardly remains in the center of the fiber layer, and the fibers in the fiber layer adhere to each other.
[0006]
Accordingly, an object of the present invention is to eliminate these problems by using the binder as a sheet without making it into a solution.
[0007]
[Means for Solving the Problems]
The present invention relates to a method for manufacturing a fiber board, and more particularly to a method for manufacturing a fiber board in which a board is formed by compressing a non-thermoplastic fiber or a fiber layer mainly composed of the fiber with a binder interposed.
[0008]
Thus, in the method for producing a fiber board according to the present invention, a sheet-like material having a binder component soluble in a solvent is used as a binder, and the binder component can be used while interposing the sheet-like material in the fiber layer. It is characterized in that it is heated and compressed by applying a soluble solvent.
[0009]
In the fiber board manufacturing method according to the present invention, the non-thermoplastic fiber may be natural fiber or non-thermoplastic chemical fiber, the binder component may be acetate, and the solvent may be acetone. In this case, the fiber layer may be any form of fiber layer such as a web, a fleece, or a mat.
[0010]
Moreover, in the manufacturing method of the fiber board which concerns on this invention, the said sheet-like thing is interposed between several layers of the said fiber layer as a structure which exhibits cloth shape, and the said fiber layer as a structure which exhibits the said sheet-like substance in bag shape. It can be made to interpose in the state which accommodated.
[0011]
[Operation and effect of the invention]
In the fiber board manufacturing method according to the present invention, since a sheet of a binder component is employed as a binder, no application work for the fiber layer is required as a solution-like binder as a means for interposing the binder in the fiber layer. It is. For this reason, in the said manufacturing method, the application | coating operation | work of a binder can be abbreviate | omitted, the operation | work to interpose in the fiber layer of a binder is easy, and handling is easy.
[0012]
Further, in the production method according to the present invention, since the binder component is interposed in the fiber layer in the form of a sheet, even if the fiber layer is heated and compressed with the binder component solvent applied to the fiber layer, All of the binder component is not extruded onto the surface of the fiber layer and can be sufficiently left in the fiber layer. For this reason, the binder component which remains in a fiber layer adhere | attaches the fibers in a fiber layer equally, and the fiber board which has the uniform intensity | strength as a whole can be manufactured.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
In the first embodiment of the production method according to the present invention, a mat of kenaf fibers, which are natural fibers, is employed as a fiber layer, acetate fibers in which acetate is fibrous as a binder component, and a solvent for the binder component As acetone is adopted. In the manufacturing method, a cloth is prepared from acetate fibers as a binder component, the prepared acetate fiber cloth is sandwiched between two layers of a kenaf fiber mat, and a solvent is placed on the kenaf fiber mat in this state immediately before hot pressing. Is sprayed, and then the kenaf fiber mat is press-molded while being heated to about 100 ° C. Thereby, the fiber board which consists of a kenaf fiber mat is manufactured.
[0014]
In the hot pressing step of the production method, the acetate fiber dissolves with acetone and penetrates the entire kenaf fiber mat, and also exhibits a binder function by evaporation of acetone, and bonds the fibers in the kenaf fiber mat evenly. Thus, a kenaf fiber board having a uniform strength as a whole is obtained. The kenaf fiber board has biodegradation characteristics due to microorganisms, etc. When the used kenaf fiber board is discarded, it is buried in the soil or treated with a biodegradation treatment apparatus using microorganisms. It can be biodegradable without polluting the environment.
[0015]
Thus, according to the manufacturing method, since the acetate serving as the binder component is interposed between the kenaf fiber mats in the state of the fiber cloth and the solvent acetone is sprayed thereon, the binder is heated. The component acetate is uniformly penetrated into the kenaf fiber mat by hot pressing of the kenaf fiber mat, and not all of it is pushed out to the surface of the kenaf fiber mat, and remains sufficiently in the kenaf fiber mat to leave the whole fiber. It contributes enough to the adhesion between each other.
[0016]
Moreover, according to the said manufacturing method, since the binder to be used is not a solution type binder (binder solution), the application | coating operation | work with respect to the fiber mat of a binder is unnecessary. For this reason, in the said manufacturing method, the problem resulting from the application | coating operation | work of a binder can be eliminated, and the problem which generate | occur | produces in the compression process resulting from the apply | coated binder solution can be eliminated.
[0017]
In the second embodiment of the production method according to the present invention, a mat of kenaf fibers, which are natural fibers, is used as the fiber layer, acetate fibers in which acetate is fibrous as the binder component, and a solvent for the binder component As acetone is adopted. However, in the said manufacturing method, a cloth bag is produced from the acetate fiber which is a binder component, and it uses for the hot press process in the state which accommodated the kenaf fiber mat in the produced acetate fiber cloth bag.
[0018]
In the manufacturing method, the kenaf fiber mat housed in an acetate fiber cloth bag is formed as one layer, and one or a plurality of layers thereof are layered, and acetone is sprayed on the mat to provide hot pressing. In hot pressing, the kenaf fiber mat is press-molded while being heated to about 100 ° C. Thereby, the fiber board which consists of a kenaf fiber mat is manufactured.
[0019]
According to the manufacturing method, the same effects as those of the manufacturing method of the first embodiment can be obtained. Furthermore, since the kenaf fiber mat is once accommodated in the acetate fiber cloth bag, it is accommodated in the acetate fiber cloth bag. It is easy to handle the kenaf fiber mat in a state, and it is possible to prevent the kenaf fibers from being scattered especially during transportation, spraying with acetone, hot pressing and the like.

Claims (4)

Non-thermoplastic fiber or fiber board manufacturing method in which a board is formed by compressing a binder in a fiber layer mainly composed of the same fiber, and a binder-like sheet material soluble in a solvent as a binder. A method for producing a fiber board, which is employed, wherein the sheet-like material is interposed in the fiber layer, and a solvent in which the binder component is soluble is applied and heated and compressed. 2. The method of manufacturing a fiber board according to claim 1, wherein the non-thermoplastic fiber is natural fiber or non-thermoplastic chemical fiber, the binder component is acetate, and the solvent is acetone. A manufacturing method of a fiber board. 3. The method for manufacturing a fiber board according to claim 1, wherein the sheet-like material has a cloth shape and is interposed between a plurality of layers of the fiber layer. 3. The method for manufacturing a fiber board according to claim 1, wherein the sheet-like material has a bag shape and is interposed in a state in which the fiber layer is accommodated.