JP2007275894A - Method for pulverizing fibrous material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for efficiently pulverizing a fibrous material containing fibers to obtain an easily reusable powdery product of the fibrous material. <P>SOLUTION: The method for pulverizing the fibrous material containing fibers enables to obtain an easily reusable powdery- or a chip-like product of the fibrous material. The method is carried out on a roll press 1, and comprises a step of roll-compressing/pulverizing the fibrous material between a pair of metallic rolls rotatably driven in a mutually-approaching directions in the roll press 1. In pulverizing the fibrous material, the step of roll-compressing/pulverizing is carried out on the press so that the pair of metallic rolls are energized and driven to apply a compression force to the fibrous material, whereby the fibrous material is spreaded out in its discharged direction due to rotation of the rolls. As a result, fibers contained in the fibrous material are torn, without flocculating, into small fiber pieces to make it possible to efficiently pulverize the fibrous material. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a method for pulverizing a fibrous material that pulverizes a fibrous material containing fibers. For example, waste materials of plant-based materials such as cotton, tea, and rush, and animal-based fibrous natural materials such as silk, leather, and wool. Further, it can be used for recycling waste materials of composite materials in which fiber layers and synthetic resin layers are laminated, waste materials of cotton fabrics, and the like.

Due to the recent enforcement of the recycling law, in the manufacturing industry, it is urgent to manufacture products that are easy to recycle and to construct a recycling system.
For example, in the beverage manufacturing industry, various types of drinks such as tea and coffee are sold, and with the rapid increase in production volume, tea shells that are the residue after extraction, natural vegetable fiber from coffee, and silk A large amount of silk fiber waste material is produced in the production of woven fabrics, and how to recycle it is a problem.

In addition, as a construction waste material, there is a problem of how to recycle rush used for tatami mats.
Further, there is a problem of how to recycle composite materials such as synthetic leather and tarpaulin, and waste materials such as cotton fabric obtained by laminating a fiber layer such as woven fabric and nonwoven fabric and a synthetic resin layer.

For this reason, in order to solve these problems, a method has been proposed in which each waste material is pulverized into a fine powder and added to a synthetic resin for reuse.
Specifically, the method for pulverizing the waste material includes a step of coarsely pulverizing using a screen mill using shearing force, a step of pulverizing the coarsely pulverized one of shearing force, impact force, and grinding force, And a step of pulverizing the pulverized product. Thus, by making each waste material into a fine powder, the waste material can be used for various applications, and therefore, there is an advantage that the recycling application can be greatly expanded.

  However, even when trying to pulverize fiber-based natural waste materials, composite materials composed of fiber layers and synthetic resin layers, cotton fabrics, etc. by such a pulverization method of waste materials, the fibers become entangled and become cottony during pulverization or collection Therefore, there is a problem that the pulverized product does not become a chip or powder and is difficult to reuse.

  An object of the present invention is to provide a method for pulverizing a fibrous material, which can efficiently pulverize a fibrous material containing fibers to obtain a fibrous material powder that can be easily reused.

In order to achieve the above object, a method for pulverizing a fibrous material according to the present invention is a method for pulverizing a fibrous material containing fibers, and is a pair of rotating materials while being biased toward each other. A roll compression pulverization step is performed in which the fibrous material is charged and compressed and pulverized between the metal rolls.
Here, the fiber material to be crushed includes plant-based fiber natural materials such as cotton, tea and rush, animal-based fiber natural materials such as silk, leather and wool, fiber layers such as woven fabric and non-woven fabric. It is preferable to target composite materials such as synthetic leather and tarpaulin obtained by laminating a synthetic resin and a cotton fabric. This is because the fibers are present in the material, and the fibers are entangled with a normal screen mill or the like, so that the fibers are entangled and are not easily formed into chips or powders.
Among these, the waste material of the skin material used for the seat sheet of the automobile is particularly difficult to be powdered because the flexible urethane foam is laminated.

In addition, the pair of metal rolls in the roll compression pulverization step rotate while being in contact with the urging force, and the roll rotation speed and the urging force can be arbitrarily determined as long as the fibrous material can be torn. .
The urging force acting on the pair of metal rolls is that one metal roll is a fixed roll, the urging means is provided on the other metal roll, and the other metal roll is urged on one metal roll. It can be made to act. As the urging means, one provided with a coil spring, a disc spring, a hydraulic device or the like that presses the rotating shaft of the other metal roll against the one roll side can be adopted.

According to the present invention, when the fibrous material is pulverized, by performing the roll compression pulverization step, the compressive force acts on the fibrous material by the biasing force of the pair of metal rolls, and the rotation of the roll The fiber material is stretched in the roll discharge direction by the above, so that the fibers in the fiber material are torn off into fine fiber pieces, and the pulverized product can be efficiently pulverized without becoming cottony. It is possible to obtain a fibrous material powder or chip-like material that can be easily reused.
In addition, since the fibrous material can be crushed only by a pulverizer mainly composed of a pair of rolls, the pulverization equipment can be miniaturized and the structure of the apparatus can be simplified.

In the above, the method for pulverizing a fibrous material of the present invention includes a pulverization step for pulverizing and / or an ultrafine pulverization step for pulverizing the pulverized product obtained by the roll compression pulverization step. preferable.
Here, the pulverization step and / or the ultrafine pulverization step can be performed using various known pulverizers, and it is preferable to employ a pulverizer having a function capable of ultrafine pulverization. The crusher can employ a device that pulverizes with any of shearing force, impact force, and grinding force. For example, a hammer mill, a jet mill, or the like can be employed as a device that performs only crushing. Further, as a device capable of crushing and pulverizing the thermosetting resin, a screen mill, a screen mill, a ball mill, a vibrating ball mill, a roller mill centrifugal classification mill described in JP-A-11-320558, or the like can be employed.
Then, as in the pulverization step and / or the ultrafine pulverization step, either the pulverization step or the ultrafine pulverization step may be performed after the roll compression pulverization step, You may implement a micronization process.

  By providing the crushing step and / or ultrafine pulverization step in this way, even if the pulverized product obtained by the roll compression pulverization step is not completely pulverized, it can be crushed in the crushing step. Therefore, a pulverized fibrous material that can be easily reused can be reliably obtained.

Moreover, it is preferable that the above-mentioned roll compression pulverization step is repeated a plurality of times.
Here, in order to repeatedly perform the roll compression pulverization step a plurality of times, the pulverized material once introduced into the pulverizer equipped with a set of metal rolls is again charged and the roll compression pulverization step is performed a plurality of times. Although a plurality of sets of metal rolls are provided in one apparatus, the pulverized material pulverized by the first set of metal rolls is put into the second set of metal rolls. Preferably, the pulverized product pulverized by the second set of metal rolls is further pulverized by the third set of metal rolls.

By repeating the roll compression pulverization step a plurality of times in this way, the fibers in the fibrous material by stretching can be torn in multiple stages, so that the fiber pieces are shortened and the finer fibrous material A pulverized material can be obtained.
In addition, since the roll compression pulverization step can be repeated a plurality of times simply by providing a plurality of sets of metal rolls in the pulverizer, efficient pulverization can be performed without increasing the size of the pulverizer.

Furthermore, the pair of metal rolls in the roll compression pulverization step described above preferably compresses the fibrous material with a pressure of 100 MPa or more, preferably 130 MPa or more.
Here, the pressure is not an axial force that acts on the shaft of one metal roll of the pair of metal rolls, but a pressure that acts on the fibrous material in a linear portion along the contact portion of the metal roll. Means.

The pressure can be measured by sandwiching a pressure measuring film including microcapsules encapsulating a coloring material with a pair of metal rolls and confirming the coloring state of the film after unloading. A plurality of types of pressure measuring films can be prepared according to the magnitude of pressure acting, such as for high pressure, medium pressure, and low pressure, and the approximate pressure can be measured based on the color development state of each type of film. . As a specific pressure measurement film, a prescale of Fuji Photo Film Co., Ltd. can be adopted.
This prescale is configured so that low pressure LW can be measured in the range of 2.5 to 10 MPa, medium pressure MW in the range of 10 to 50 MPa, and high pressure HS in the range of 50 to 130 MPa. And what is necessary is just to adjust the urging | biasing force between a pair of metal rolls so that the range of 100 Mpa or more may arise with HS for high pressures.

  By compressing the fibrous material at a pressure of 100 MPa or higher in the roll compression and pulverization step as described above, the fibrous material can be reliably stretched with the rotation of the roll, so the roll compression and pulverization step is efficiently performed. be able to.

Furthermore, the method for pulverizing a fibrous material according to the present invention preferably includes a cooling step for cooling the pair of rolls.
This cooling step can be performed by installing a cooling mechanism inside the cylindrical metal roll, but can also be performed by sprinkling water on the outer peripheral portion of the metal roll. Moreover, a cooling process may cool either one of a pair of metal rolls, and may cool both.
By providing the cooling step in this manner, it is possible to prevent the metal roll from being heated in association with the compression pulverization. Therefore, it is possible to prevent the deformation caused by the heating of the pair of metal rolls, and the roll in a stable state. A compression pulverization step can be performed.

In the roll compression and pulverization step, water is preferably added to the fibrous material when the fibrous material is charged.
The amount of water to be added may be an appropriate amount depending on the input amount of the material to be crushed, but as a general guideline, it is preferable to add about 10 wt% with respect to the input amount of the fibrous material.
By adding water in this manner, the pulverization efficiency of the fibrous material is improved, and a shorter pulverized fiber piece can be obtained.

  According to the present invention as described above, there is an effect that it is possible to obtain a fibrous material powder that is easily pulverized by efficiently pulverizing a fibrous material containing fibers.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a grinding system for carrying out a method for grinding a fibrous material according to an embodiment of the present invention. This crushing system consists of plant-based natural fiber materials such as cotton, tea and rush, animal-based natural fiber materials such as silk, leather, and wool, and synthetic leather and tarpaulin. The system includes a roll press 1, a crusher 2, an ultrafine pulverizer 3, and a collector 4.

The roll press 1 is a part for producing a fibrous material chip or a fibrous material powder by roll compressing and pulverizing the fibrous material, and in this embodiment, the two-stage roll press machines 11 and 12 are used. It is configured by connecting in series.
As shown in FIG. 2, the roll press machines 11 and 12 include a raw material charging hopper 21, a fixed roll 22, a movable roll 23, an urging device 24, and a pulverized material collection bucket 25.

The raw material charging hopper 21 is a portion into which a fibrous material as a raw material is charged, and the pulverized material recovery bucket 25 is a container for recovering the pulverized material pulverized by the roll press machines 11 and 12.
The fixed roll 22 is made of a metal cylindrical body, and is rotatably supported with respect to a rotation shaft (not shown) provided in the press body portion, and the rotation shaft is fixed to the press body portion. .

The movable roll 23 is made of a metal cylindrical body similar to the fixed roll 22 and is provided in the press main body portion so as to be rotatable about a rotation axis movable in an approaching and separating direction with respect to the rotation axis of the fixed roll 22. It is pivotally supported. Although not shown in FIG. 2, a cooling mechanism is provided inside the fixed roll 22 and the movable roll 23, and heating of the rolls 22 and 23 due to friction during pulverization is suppressed by the cooling mechanism. .
The rolls 22 and 23 have a diameter x length of, for example, 150 mm x 150 mm or 300 mm x 300 mm.
In addition, the fixed roll 22 and the movable roll 23 are configured to rotate synchronously by driving means such as a motor, and the number of rotations of these rolls 22 and 23 is arbitrarily adjusted by adjusting the driving means. can do.

  The urging device 24 is an urging unit that urges the movable roll 23 in a direction approaching the fixed roll 22, and includes a shaft portion 241 whose tip abuts against the outer peripheral surface of the movable roll 23, and a press main body portion of the shaft portion 241. And a plurality of disc springs 242 inserted between the movable rolls 23, and a pressing force adjusting screw 243 provided at the proximal end portion of the shaft portion 241 for adjusting the biasing force of the movable roll 23. By adjusting the pressing force adjusting screw 243, the pressing force of the shaft portion 241 against the movable roll 23 changes, and the urging force acting between the fixed roll 22 and the movable roll 23 can be adjusted. Yes.

The urging force adjusted by the urging device 24 is set to be 100 MPa in an upper and lower region having a width of 2.5 mm across the contact line between the fixed roll 22 and the movable roll 23.
The biasing force is set using the pressure measurement film described above. First, the pressure measurement film for high pressure is placed between the fixed roll 22 and the movable roll 23 in a state where the movable roll 23 is separated from the fixed roll 22. And the pressing force adjusting screw 243 is rotated to generate an urging force between the fixed roll 22 and the movable roll 23, and is tightened until the portion of the area of the pressure measuring film is colored to 100 MPa. Is called.

  The crusher 2 is a machine that crushes the pulverized material pulverized by the roll press 1 using a shearing force, and a screen mill is employed in the present embodiment. The screen mill includes a cylindrical main body and a rotary blade provided in the cylindrical main body, and performs pulverization using a shearing force between the fixed blade formed on the inner surface of the cylindrical main body and the rotary blade. By arranging a screen at the discharge side opening of the cylindrical main body, the charged raw material is repeatedly pulverized until it is crushed to a predetermined size.

The screen mill as the crusher 2 is used as a crusher when the clearance between the fixed blade and the rotary blade is set to 2 to 5 mm and the screen mesh diameter on the discharge side is set to 1 to 8 mmφ. On the other hand, when the clearance between the fixed blade and the rotary blade is set to 0.2 to 2 mm and the screen mesh diameter on the discharge side is set to 0.5 to 1 mmφ, it is used as a fine pulverizer.
Such a crusher 2 is used when a raw material fibrous material is a composite material such as synthetic leather or tarpaulin in which a fiber layer and a synthetic resin layer are laminated, or a cotton fabric is pulverized by a roll press 1, and roll compression pulverization is performed. The pulverized material obtained by the above is collected in the bucket 2A.

  The ultrafine powdering device 3 pulverizes plant fiber natural materials such as cotton, tea and rush, and animal fiber natural materials such as silk, leather and wool into ultrafine powder. In this embodiment, Single track jet mill is adopted. This single track jet mill has a compressed air flow path configured in a ring shape, a classifier connected to a part of the compressed air flow path, and a hopper for charging raw materials. Is a device in which the pulverized product collides with each other and is pulverized by introducing the pulverized product of the plant-based or animal-based natural fiber material that has passed through and circulating the pulverized product in the compressed air flow path. The fine powder pulverized to a particle size of is collected in a classifier and sent to the collector 4. In order to further reduce the particle size, it is preferable to install a ball mill in front of the single track jet mill and finely pulverize the product pulverized by the ball mill with the single track jet mill. Further, by pulverizing and compressing with the roll press 1 before being charged into the ball mill, the amount charged into the ball mill is increased, the pulverizing time is shortened, and the economy is improved.

  The collector 4 is a device that collects finely pulverized natural fiber material having a predetermined particle diameter, a cylindrical main body, and an airflow generator that generates a rotating airflow inside the cylindrical main body. The fine powder of the natural fiber material that cannot be collected by the collector 4 is collected by a bag filter (not shown) installed at the subsequent stage of the collector 4. The

Next, a procedure for pulverizing a fibrous material using the above-described pulverizing system for a fibrous material will be described.
(1) The fibrous material obtained as a waste material is charged into the raw material charging hopper 21 of the first-stage roll press machine 11 of the roll press 1, and the pulverization of the fibrous material by the roll press 1 is started (roll compression). Crushing step). The input amount of the fibrous material to the raw material charging hopper 21 is set to about 10 kg / h, and the roll rotation speed is set to about 10 rpm. At this time, approximately 10 wt% of water is charged into the raw material charging hopper 21 as necessary.

(2) In parallel with the roll compression and pulverization step, the cooling water is circulated through the cooling mechanism inside the fixed roll 22 and the movable roll 23, and the rolls 22 and 23 heated by the frictional heat generated during the pulverization of the fibrous material. Cooling by a cooling mechanism (cooling step).
(3) When the roll compression pulverization by the first stage roll press machine 11 is completed, the pulverized material of the fibrous material is put into the raw material charging hopper 21 of the second stage roll press machine 12, and the second time Roll compression pulverization is started. In addition, about concrete grinding | pulverization conditions, cooling of the rolls 22 and 23, etc., it is the same as that of the 1st time.

(4) When the fiber material used as a raw material is a composite material such as synthetic leather or tarpaulin and a laminate material of these with urethane foam, the pulverized material pulverized by the roll press 1 is put into the crusher 2, The pulverized product is crushed (pulverization step). The input amount of the pulverized material is 20 kg / h as a guide, and the rotation speed of the rotary blade is set to about 1000 rpm. Further, when pulverization is performed by setting the clearance between the fixed blade and the rotary blade to 5 mm and the discharge screen mesh diameter to 8 mmφ, a chip-shaped pulverized product having a size of about 5 mm square is obtained.

(5) When the raw fiber material is plant fiber natural material such as tea or rush, or animal fiber natural material such as silk, leather, wool, etc., Then, it is sent to the ultrafine pulverizer 3 and pulverized by this superfine pulverizer 3, so that it is made into a fine powder of natural organic matter and sent to the collector 4, and the natural organic matter fine powder is recovered.

According to this embodiment as described above, the following effects are obtained.
When the fiber material is pulverized, a roll compression pulverization step is performed, so that the compressive force acts on the fiber material by the urging force of the pair of metal rolls 22 and 23, and the rotation of the rolls 22 and 23 causes the fiber material to rotate. Since the material is stretched in the discharge direction of the roll, the fibers in the fiber material are torn off into fine fiber pieces, and the pulverized product can be efficiently pulverized without becoming cottony. Easy-to-use fibrous material powder or chips can be obtained.
Further, since the fibrous material can be pulverized only by the roll press 1 mainly composed of the pair of rolls 22 and 23, the pulverization equipment can be downsized and the structure of the apparatus can be simplified. it can.

Furthermore, by providing the crushing step in this way, even if the pulverized product obtained by the roll compression pulverization step is not completely powdered, it can be crushed in the crushing step. An easily usable pulverized fibrous material can be obtained with certainty.
And by repeating the roll compression pulverization step a plurality of times, the fibers in the fibrous material by stretching can be torn in multiple stages, so the fiber pieces are shortened and the finer fibrous material Can be obtained.

Moreover, since the roll press 1 that can be pulverized in multiple stages can be obtained simply by connecting the roll press machines 11 and 12 in series, efficient pulverization can be performed without increasing the size of the pulverizer. .
Furthermore, by compressing the fibrous material at a pressure of 100 MPa or more in the roll compression pulverization step, the fibrous material can be reliably stretched as the rolls 22 and 23 rotate, so that the roll compression pulverization step is efficient. Can be done.

And by providing the cooling process by the cooling mechanism inside the rolls 22 and 23, since it can suppress that the metal rolls 22 and 23 heat with compression grinding, it accompanies heating of a pair of metal rolls 22 and 23. Deformation and the like can be prevented, and the roll compression pulverization step can be performed in a stable state.
Further, by adding water during the roll compression pulverization step, the pulverization efficiency of the fibrous material is improved, and a pulverized product of shorter fiber pieces can be obtained.

In addition, this invention is not limited to the above-mentioned embodiment, The modification as shown below is also included.
In the said embodiment, although the roll press 1 connected the two roll press machines 11 and 12 in series, this invention is not restricted to this, 3-5 roll press machines are connected in series, You may repeat a 5-roll compression crushing process.

Moreover, in the said embodiment, although the single track jet mill was employ | adopted as the pulverization apparatus 3 which pulverizes tea etc., you may employ | adopt other types of jet mill, a ball mill, etc.
Furthermore, in the said embodiment, although the screen mill was employ | adopted as the crusher 2 which implements a crushing process, this invention is not restricted to this, You may employ | adopt other crushers, such as an impeller mill.
In addition, the specific structure, shape, and the like when implementing the present invention may be other structures as long as the object of the present invention can be achieved.

Hereinafter, the present invention will be described more specifically with reference to examples and comparative examples. In addition, this invention is not limited to the content of the Example.
[Example 1]
Plant fiber natural materials such as tea that are produced as waste materials from the beverage manufacturing industry, etc. are dried and then subjected to a roll compression pulverization step using the roll press machine 11 shown in FIG. To obtain fine powder of plant fiber natural material. In the first roll compression pulverization step, 10 wt% water is added to tea to perform compression pulverization. Other pulverization conditions are as follows.
Roll press machine 11: Roll press DP-150 type (manufactured by Seishin Co., Ltd.)
Roll diameter x roll length: 150 mm x 150 mm
Roll rotation speed: 10rpm
Input amount: 10 kg / h
Ultrafine powdering device 3: STJ-200 (jet mill, manufactured by Seishin Enterprise Co., Ltd.)
Air pressure: 7kg / cm ²
Input amount: 10 kg / h

[Example 2]
The material to be crushed is a laminate material of polyester fabric and urethane foam, which is a laminate of a fiber layer and a synthetic resin layer. After the roll compression pulverization process is repeated twice by the roll press machine 11, the crushing process by the crusher 2 is performed. The chip-like fibrous material pulverized product was obtained.
The grinding conditions are as follows.
Roll press machine 11: Roll press DP-150 type (manufactured by Seishin Co., Ltd.)
Roll diameter x roll length: 150 mm x 150 mm
Roll rotation speed: 10rpm
Water condition: 10 wt%
Number of passes: 2 passes
Input amount: 10 kg / h
Crusher 2: Made by Horai Co., Ltd., mesh mill HA-2542
Rotary blade rotation speed: 2500rpm
Fixed blade-rotary blade clearance: 2mm
Discharge screen mesh diameter: 2mm
Input amount: 20 kg / h

[Example 3]
A pulverized cotton fabric was obtained in the same manner as in Example 2, except that the material to be pulverized was a cotton fabric such as a shirt and sheets, and the crusher 2 was changed to the following specifications.
Crusher 2: Orient Mill VM-20, manufactured by Orient Co., Ltd.
Rotary blade rotation speed: 1000rpm
Fixed blade-rotary blade clearance: 5mm
Discharge screen mesh diameter: 8mm
[Example 4]
A tarpaulin material was obtained by the same operation as in Example 3 except that the material to be ground was a tarpaulin material made of PVC and cotton fabric.

[Comparative Example 1]
A material similar to that of Example 1 is used as a material to be crushed, coarsely pulverized by a screen mill, and then finely pulverized by a pulverizer 3 without performing roll compression pulverization by a roll press 1. Natural powder was obtained. The pulverizing conditions by the pulverizing apparatus 3 are the same as those in Example 1, and the pulverizing conditions of the screen mill are as follows. The average particle size of the pulverized product after coarse pulverization by a screen mill was 2 mm.
Screen mill: Orient mill VM-20, manufactured by Orient Co., Ltd.
Rotary blade rotation speed: 1000rpm
Fixed blade-rotary blade clearance: 2mm
Discharge screen mesh diameter: 2mm
Input amount: 10 kg / h

[Comparative Example 2]
The same material as in Example 2 was used as the material to be pulverized, and pulverized under the screen mill pulverization conditions of Example 2 to obtain a pulverized material.
[Comparative Example 3]
A material similar to that in Example 3 was used as a material to be pulverized, and pulverized under the screen mill pulverization conditions of Comparative Example 1 to obtain a pulverized material.
[Comparative Example 4]
A material similar to that in Example 4 was used as a material to be pulverized, and pulverization was performed under the screen mill pulverization conditions of Comparative Example 1 to obtain a pulverized material.
The results of Examples 1 to 4 and Comparative Examples 1 to 4 are shown in Table 1.

  When Example 1 and Comparative Example 1 are compared, in the case of plant-based fibrous natural materials such as tea, by carrying out a roll compression pulverization step using a roll press 1, the average particle size of the fine powder of the natural fibrous material is reduced. It can be seen that the maximum particle size can be greatly reduced. In addition, since the powder of the comparative example 1 has a fiber residue and cannot be used as it is, it is necessary to perform a classification process in a later stage.

  Further, when Example 2 and Comparative Example 2, Example 3 and Comparative Example 3, Example 4 and Comparative Example 4 are compared, the pulverized product by the screen mill and roll press 1 is in the form of powder or chips. However, in the case of Comparative Example 2, Comparative Example 3, and Comparative Example 4, the fibers are not cut short, and there is a lot of fluffing. Even if they are put into a molding machine or the like as they are, they are melted and reused. Can not. On the other hand, in the case of Example 2, Example 3, and Example 4, since there is no fluff and the fiber is sufficiently cut, it can be put into a molding machine and reused.

It is a schematic diagram showing the grinding | pulverization system for enforcing the grinding method of the thermosetting resin foam which concerns on embodiment of this invention. It is a side view showing the structure of the roll press machine for implementing the roll compression crushing process in the embodiment.

Explanation of symbols

1 Roll press (roll compression crushing process)
2 Crusher (Crushing process)

Claims (9)

A method for pulverizing a fibrous material for pulverizing a fibrous material containing fibers,
A method for pulverizing a fibrous material, comprising: a roll compression pulverization step for compressing and pulverizing the fibrous material between a pair of metal rolls that rotate while being biased toward each other. . The method for pulverizing a fibrous material according to claim 1,
A method for pulverizing a fibrous material, comprising a pulverization step for pulverizing and / or an ultrafine pulverization step for pulverizing the pulverized product obtained by the roll compression pulverization step. The method for pulverizing a fibrous material according to claim 1 or 2,
The method for crushing a fibrous material, wherein the roll compression crushing step is repeated a plurality of times. In the grinding method of the fibrous material in any one of Claims 1-3,
The pair of metal rolls in the roll compression pulverization step compresses the fibrous material with a pressure of 100 MPa or more. In the grinding method of the fibrous material in any one of Claims 1-4,
A method for pulverizing a fibrous material, comprising a cooling step for cooling the pair of rolls. In the grinding method of the fibrous material in any one of Claims 1-5,
In the roll compression pulverization step, water is added to the fibrous material when the fibrous material is charged. In the grinding method of the fibrous material in any one of Claims 1-6,
The method for pulverizing a fibrous material, wherein the fibrous material is a plant-based natural fiber material such as cotton, tea, or rush. In the grinding method of the fibrous material in any one of Claims 1-6,
The method for pulverizing a fibrous material, wherein the fibrous material is an animal-based fibrous natural material such as silk, leather, or wool. In the grinding method of the fibrous material in any one of Claims 1-8,
The said fibrous material is comprised from the composite material which laminated | stacked the single material of a fiber layer, or the fiber layer and the synthetic resin layer, The grinding method of the fibrous material characterized by the above-mentioned.

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