JP3621372B2 - Bamboo fiber and carbonized bamboo fiber manufacturing method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention has a deodorizing action, a deodorizing action, an antibacterial action, and bamboo fibers and carbonized bamboo fibers having a wide range of uses such as Japanese paper, wallpaper, fine arts, barrier-free goods, chemicals, and oil product substitutes as high-grade fibers. The present invention relates to a manufacturing method, and relates to a technique for easily extracting bamboo fibers and carbonized bamboo fibers from natural bamboo materials.
[0002]
[Prior art]
A conventional method for manufacturing bamboo fiber is a method in which a round bamboo material cut into a predetermined length is vertically divided into 10 to 20 pieces by a powder bamboo machine, and further, the fiber is taken out through a pulverizer. The fiber length of bamboo fiber manufactured by this method is 2 to 3 cm at the longest, and the time required for manufacturing one lot is 1 to 2 hours. In order to take out a large amount of bamboo fiber by this method, it is necessary to perform the above method many times. Also, with this conventional method, it is impossible to take out bamboo fibers that are long in the fiber direction in order to apply the bamboo material to a pulverizer.
[0003]
[Problems to be solved by the invention]
The object of the present invention is to solve various problems of the conventional means as described above, and it is easy to process bamboo fibers from natural bamboo materials regardless of the length. In addition to making it possible to take out a large amount, it is also possible to take out not only bamboo fibers but also carbonized bamboo fibers depending on the conditions of the explosion operation.
[0004]
That is, the present invention does not require the work process of pulverizing from powdered bamboo unlike the conventional method, and only by setting a large amount of bamboo at once in the pressure can body, the bamboo fiber can be taken out regardless of the length. Therefore, it is an object to obtain a new technical means that can be easily performed, and hence the manufacturing cost of bamboo fiber is low.
[0005]
[Means for Solving the Problems]
In the method for producing bamboo fiber according to the present invention which has solved the above problems, the bamboo material 11 is put into the pressure can body 1 and water vapor is jetted into the pressure can body so that the temperature inside the pressure can body is 100 ° C. or higher. Heat is applied to the lignin layer, which plays a role in keeping the fibers in contact with each other, and then the pressure inside the can corresponding to the water vapor temperature is momentarily released to the atmosphere, so that only the lignin layer is decomposed without damaging the bamboo fiber. The bamboo fiber is taken out.
[0006]
That is, in the present invention, when collecting bamboo fiber from natural bamboo material, the pressure can body is used to expose the bamboo material to water vapor of 100 ° C. or higher and the corresponding pressure, and the pressure can body pressure is instantaneously released to the atmosphere . By performing the operation several times to several tens of times, the bamboo fiber can be easily taken out in a few hours regardless of the length.
[0007]
The feature of the manufacturing method of the present invention is that not only the bamboo fiber but also carbonized bamboo is changed by changing the treatment temperature in the pressure can containing the bamboo material and the treatment conditions such as the number of times the pressure is instantaneously released to the atmosphere. The fiber can also be taken out. One process time is 2 to 3 hours, and it has been confirmed by experiments of the inventors of the present invention that long bamboo fibers and carbonized bamboo fibers can be taken out in the fiber direction.
[0008]
According to the method for producing bamboo fiber and carbonized bamboo fiber according to the present invention, it is not necessary to go through the number of steps of vertical splitting of bamboo by a conventional powder bamboo machine and pulverizing step of taking out the fiber, and it is simple and easy for the operator to operate. In addition to shortening the working time, it is possible to take out a large amount of bamboo fiber or carbonized bamboo fiber of a desired length at a time, so that the manufacturing cost of bamboo fiber or carbonized bamboo fiber can be reduced. .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The Example of the manufacturing method of the bamboo fiber of this invention is shown below. The apparatus used in the examples is shown in FIG. In the figure, 1 is a horizontal cylindrical pressure tank having a pressure resistance of 10 kg / cm ² . One end of the pressure tank 1 is provided with a door 10 for taking contents in and out. The pressure tank 1 is provided with an open valve 2 for rapidly releasing the internal pressure to the atmosphere. In the illustrated apparatus, a butterfly valve is used as the release valve 2 in order to quickly release the pressure. A silencer 3 is connected to the discharge port of the release valve 2 to eliminate a large fluid sound when the pressure is released. Water vapor in the pressure tank 1 is released to the atmosphere via the silencer 3.
[0010]
A steam blowing pipe 7 having a large number of steam blowing holes is disposed at the bottom of the pressure tank 1, and this steam blowing pipe is connected to a steam boiler 8 via a steam valve 4. The opening degree of the steam valve 4 is controlled by a detection signal of a temperature sensor or a pressure sensor (not shown) installed in the pressure tank 1. In the figure, 6 is an automatic control panel, and 9 is a drain pipe of the pressure tank 1.
[0011]
The bamboo material 11 from which the bamboo fiber is to be taken out is mounted on a cart 5 having a bamboo material support frame and inserted into the pressure tank 1. The carriage 5 includes wheels 12 and moves between the rails in the pressure tank 1 and the rails outside the tank, and the bamboo material is taken in and out of the pressure tank 1.
[0012]
Next, an embodiment performed using the above apparatus will be described with reference to reference numerals (1) to (8) in FIG. 1 and FIG.
[0013]
First, the bamboo material which is still round is mounted on the cart 5 and fixed with a belt or the like, the cart 5 is put in the pressure tank 1 and the door 10 is closed (1). Then, the steam valve 4 is opened, the steam from the steam boiler 8 is blown into the pressure tank 1, and the pressure tank 1 is heated (2). In the first heating cycle, the tank internal temperature is maintained at 170 to 175 degrees Celsius, and heating is performed for 30 to 60 minutes (3). After the timer expires, the release valve 2 is opened to release the tank vapor to the atmosphere (4). In the illustrated apparatus, the time required to open and close the release valve 2 is about 5 seconds.
[0014]
Next, the open valve 2 is closed, the steam valve 4 is opened, and the heating steam is supplied again to the pressure tank 1 (5). In the second and subsequent heating cycles, it takes about 5 minutes for the temperature in the tank to rise to a predetermined 170 to 175 degrees Celsius (6), and after the temperature rise, the temperature is maintained at 170 to 175 degrees Celsius for 2 to 3 minutes ( 7). After the timer expires, the release valve 2 is opened to release the tank pressure to the atmosphere (8). Thereafter, the second and subsequent heating / decompression cycles (6) to (8) are repeated a predetermined number of times.
[0015]
The number of repetitions is 5 to 15 times depending on the size of the bamboo to be processed, 10 to 15 times for bamboo materials having a diameter of 100 mm or more, 7 to 10 times for bamboo materials having a diameter of 75 to 100 mm, and 5 to 7 times for bamboo materials having a diameter of 50 to 75 mm. The number of repetitions of about the number of times was appropriate.
[0016]
As Test Example 1, a bamboo material having a length of 3000 mm and a diameter of about 120 mm was treated under the conditions of a heating temperature of 173 ° C. and a heating / depressurization frequency of 15 times. As a result, a bamboo fiber having a length of 3000 mm could be taken out. As Test Example 2, 11 bamboo materials having a length of 3000 mm and a diameter of about 50 to 120 mm were simultaneously processed under the conditions of a heating temperature of 171 ° C. and a heating / depressurization frequency of 10 times. As a result, bamboo fibers having a length of 3000 mm were extracted from all the bamboo materials. . The total weight of the bamboo material obtained in Test Example 2 was 80 kg, and it was confirmed that bamboo fibers that were long in the fiber direction could be taken out at a large amount and at a low cost by using the method of the present invention.
[Brief description of the drawings]
FIG. 1 is a time chart showing an example of a heating / decompression cycle. FIG. 2 is a schematic perspective view of an apparatus used in the examples.
1 Pressure tank 11 Bamboo

Claims (2)

Predetermined placed natural bamboo material was cut into lengths (11) to the pressure can body (1), the pressure can body (1) and the heating and pressurizing operation supplies 100 ° C. or more temperature of the steam in the pressure can body (1) A method for producing bamboo fibers, wherein the bamboo fibers are separated from each other by repeating a pressure reducing operation for rapidly releasing the pressure in the atmosphere . Put natural bamboo material was cut into a predetermined length (11) to the pressure can body (1), and heating and pressurizing operation for supplying steam of the pressure can body (1) above 100 ° C. in temperature, pressure can body bamboo fiber cross separated by repeated rapidly and depressurization to atmospheric release the pressure, and supplying a temperature above the hot steam required to carbonize the bamboo during the heating operation, carbonized Bamboo fiber manufacturing method.

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