JPH03215008A - Method and apparatus for dispersing aggregate of short fiber into single fiber - Google Patents

Abstract

PURPOSE:To enable short fibers to be dispersed and blended uniformly into a powdery raw material by opening and dispersing the aggregate of short fibers in a dried state into one by one single fiber in the form of a raw material of various kinds of artificial fibers, and performing dry-mixing uniformly with fine particles. CONSTITUTION:While conducting initial opening for the aggregate 8 of short fibers by the needle projections 2 of a first rotator 1, it is supplied between both first and second rotators 1, 3, and then passed therethrough for allowing it to be opened and dispersed, and besides, during the period of the process, fine particles 17 or fine fibers and the like are blended into the dispersed fibers. In the next place, a fiber aggregate added with the fine particles or fine fibers is supplied forcibly into a third rotator 25 having a number of needle projections, and then opened and dispersed into a path 31 defined by a casing 30 disposed along the outer periphery of the third operator. And, they are scatteringly moved in the path by air flow produced by rotation of the third and a fourth rotator 25, 33, and then a powdery raw material 35 is mixed therein. Thus, the aggregate of dispersed and mixed short fibers can be dispersed and blended into the single fibers.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is directed to the production of aggregates of short fibers in a dry state in the raw material state of various artificial fibers produced in factories, such as carbon short fibers and aramid short fibers. This invention relates to a method and apparatus for opening and dispersing the fibers into single filaments and uniformly dry-mixing them with powder such as cement or refractories. (Prior Art) As shown in Japanese Patent Publication No. 63-6250, the inventor of the present invention has conventionally proposed a pair of upper rotating bodies each having a large number of fine protrusions erected at small intervals on the surface thereof, with a small gap between the tips of both fine protrusions. are disposed facing each other, and the short carbon fiber lumps are held down by the thin protrusions of one rotary body having a slow circumferential speed, while the small protrusions of the rotary body having a high circumferential speed are used to open the small lumps. A short carbon fiber aggregate supplying device is disposed above it so as to cause movement, and a pair of lower rotating bodies each having a large number of fine protrusions erected at small intervals on its surface are disposed below. Each of the fine protrusions intersects between the fine protrusions of the upper rotating body, and the fine protrusions intersect with each other slightly, do not intersect with each other, or have a slight gap, and the short fibers attached to the fine protrusions of the upper rotating body are At the same time, the fine protrusions of the rotating body with different circumferential speeds are made into elastic fine wires that can easily disperse insufficiently divided short carbon fiber lumps due to their own elasticity, and are passed between the lower rotating bodies to separate the fibers. We have proposed an apparatus for producing fine powder raw materials in a dry state in which short carbon fibers are dispersed and mixed in the form of single fibers, and are equipped with a means for mixing the short carbon fibers with fine powder raw materials. Furthermore, as shown in Japanese Patent Application Laid-Open No. 1-192826, (1) an aggregate of short fibers is forcibly fed approximately toward the center of a rotating body having a large number of small protrusions on its surface through a conveying device such as a pair of belt conveyors; A method for dispersing aggregates of short fibers into single fibers by scraping off the aggregates held at the tip of the transfer device by a large number of small protrusions on the surface of the rotating body and dispersing them into single fibers. (2) A transfer device such as a pair of belt conveyors is disposed toward the approximate center of a rotating body having a large number of small protrusions, and a device is provided to supply aggregates of short fibers to the transfer device; We proposed a device for dispersing short fiber aggregates into single fibers, which is equipped with a means for forcibly transferring the aggregates at the tip of the device and holding them while sending them out. (Problem to be solved by the invention) In recent years, nylon, vinylon, polypropylene,
Various fibers such as glass, carbon, aramid, and silicon carbide are artificially produced in factories, and fibers are composited with various materials such as metal, glass, plastic, ceramic, refractories, concrete, cement mortar, etc., depending on the purpose. Reinforced composite materials to increase the strength of mechanical properties, electromagnetic shielding that takes advantage of the characteristics of each material, surface heating concrete, cement mortar, etc., or as an alternative fiber to asbestos, which is a hot topic of public pollution problems. It is rapidly becoming popular or under development in many areas. These fiber diameters are approximately 7μ to 18μ
Continuous long fibers or such single fibers are bundled with a binder and cut into chip-shaped short fibers, or cross-shaped, filter-shaped, short fiber-shaped, whisker-shaped, etc., depending on the purpose. These are selected and used as appropriate. On the other hand, carbon, aramid, etc. in the fibers are used as refractories.
P. C. In order to be used as a reinforcing material for concrete, cement mortar, etc., monofilament is required due to its chemical stability, and short lengths of approximately 3 m to 10 cm are generally used due to its aspect ratio, unless it has a special purpose. It is desired to mix fibers randomly. In the above conventional technology, when trying to speed up the rotation of each drive part or increase the amount of supply per unit time in order to increase the capacity of the device, the fibers are easily damaged and the dispersion effect is insufficient, which naturally reaches its limit. In addition, when short fiber aggregates are supplied in a fixed quantity from the supply amount control device from above the pair of upper rotating bodies, the supply state is intermittent due to natural falling, resulting in the same problem as above. There was a fear. Furthermore,
On the other hand, if the operating time of one batch is too long, there will be defects such as fibers tending to granulate in the mixer, and there will naturally be certain restrictions on the correlation between fiber processing capacity and mixer capacity, which will reduce the processing capacity relative to the equipment cost. However, if you try to simplify the process by processing a mixture of small aggregates of short carbon fibers and fine powder or fine fibers, the fine powder will be deposited on the surface of the low-speed rotating drive part of the dispersion device. There was a problem in that it could become clogged with bodies, etc., making long-term continuous operation difficult.

In the latter case, aggregates of short fibers are sandwiched between a pair of belt conveyors and forcedly fed, making it possible to continuously feed a fixed amount, so there is little damage to the fibers, and mixing with fine powder or fine fibers is good. It was difficult to narrow the gap between the tip of the supply part and the tip of the needle-shaped protrusion of the rotating body beyond a certain limit, and there was a risk that fiber opening would be insufficient. The present invention aims to solve these problems. (Means for Solving the Problems) In order to achieve the above object, the present invention has the following objectives: (1) An aggregate of short fibers is sandwiched between a pair of belt conveyors and forced onto a first rotating body having a large number of needle-like protrusions. While initially opening the fibers using the needle-like protrusions of the first rotating body, the first rotating body and a second rotating body having a large number of needle-like protrusions on the surface are provided with a slight gap, and are rotated. The bodies are arranged facing each other with different circumferential speeds,
The initially opened short fibers are supplied between the two rotating bodies and passed through to open and disperse them, and during this process, fine powder or fine fibers are mixed into the dispersed fibers. ,
Next, this fine powder or fiber aggregate containing fine fibers is sandwiched between a pair of belt conveyors and forcibly fed to a third rotating body having a large number of needle-like protrusions, and the needle-like protrusions of the third rotating body The particles are opened and dispersed in a passage formed by a casing disposed along the outer periphery of the third rotary body, and are scattered and rotated within the passage by airflow generated by the rotation of the third and fourth rotary bodies. A method of dispersing aggregates of short fibers into single fibers by mixing fine powder or fine fibers or powdered raw materials such as cement and refractories into the dispersed fibers during the process and completely dispersing and mixing them. (2) A pair of belt conveyors are installed to forcibly convey short fiber aggregates toward a first rotating body having many needle-like protrusions on its surface, and A second rotating body having needle-like protrusions is disposed, and a means for mixing fine powder or fine fibers is provided, and the first and second rotating bodies are moved toward a third rotating body having a large number of needle-like protrusions on the surface. A pair of belt conveyors are installed to forcibly convey the fine powder or fiber aggregate containing fine fibers that has been opened and dispersed through the gap, and the first belt is conveyed from the pair of biting rollers at the tip of the belt conveyor. A casing is disposed along the outer periphery of the third and fourth rotating bodies in the rotational direction to form a passage for opening and dispersing and mixing the fine powder or the fiber aggregate containing fine fibers,
An apparatus for dispersing aggregates of short fibers into single fibers, which is equipped with means for mixing fine powder or fine fibers or powdery raw materials such as cement and refractories into the dispersed fibers during the process. (
3) The aggregate of short fibers according to claim 2, wherein a pair of biting rollers are disposed between the tip of the pair of belt conveyors and the tip of the needle-shaped protrusion protruding from the surface of the rotating body. A device that disperses the particles into different shapes.

(4) A first sweeper brush and a second sweeper brush are placed at the bottom of the first rotating body and the second rotating body, respectively, so that the rotating body and the brushes bite into each other, and a slight gap is provided between the opposing brushes. Further, third sweeper brushes for the second sweeper brush are arranged so as to be slightly offset from each other, and the circumferential speeds of the first sweeper brush, second sweeper brush, and third sweeper brush are sequentially slowed down. The present invention is characterized by an apparatus for dispersing aggregates of short fibers into single fibers according to claim 2.

(Example) A detailed explanation will be given below based on the illustrated example. 1
is a cylindrical first rotating body with a large number of needle-like protrusions 2 protruding from its surface, and has a diameter of 278 m and a diameter of 138 r.m. p. m, circumferential speed 2 m/
It is rotating in the direction of the arrow with s. 3 is a cylindrical second rotating body with a large number of needle-like protrusions 4 protruding from its surface, and has a diameter of 167 cm.
2 8r. p. m, and is arranged at a circumferential speed of 0.245 m/s at a slight interval on the side of the first rotating body 1, and rotates in the direction of the arrow. A first sweeper brush 5 and a second sweeper brush 6 are located below the first rotating body 1 and the second rotating body 3.
and the needle-like protrusions 2 and 4 of the first rotating body 1 and the second rotating body 3, respectively.
Sweeper brushes 5 and 6 are placed at a slight distance from each other. 7 is the third
The sweeper brush bites into the second sweeper brush 6, and the first sweeper brush 5 has a circumferential speed of 0.163■
/S rotates in the direction of the arrow. 8 is a short fiber aggregate in which short fibers such as pitch-based short carbon fibers and aramid short fibers having a diameter of about 3 to 1 square centimeter are intertwined. Reference numeral 9 denotes a belt conveyor arranged horizontally, and the vertical portion 9' is directed toward the center from above the first rotating body 1 by guide rollers 11.13. Reference numeral 12 denotes a biting belt conveyor disposed approximately parallel to the vertical portion 9' of the belt conveyor 9, and a belt conveyor 12 is provided between the guide roller 11.13 at the tip and the needle-shaped protrusion 2 of the first rotating body 1. A pair of biting rollers 14.15 are arranged, one
4 is fixed, and 15 is constantly pressed in the direction of one biting roller 14 by a spring arranged on the side. The gap between the biting rollers 14 and 15 and the needle-like protrusions 2 is about 0.5 mm. Reference numeral 16 denotes a hopper containing inorganic fine powder such as silica fume with a particle size of 0.1 μm to 1 μm or inorganic fine fibers such as alumina whiskers with a diameter of 0.01 μm to 1 μm. A gate 38 is supplied between the first rotary body 1 and the second rotary body 3, and controls the supply amount by vertical adjustment;
19 is an auxiliary belt conveyor. Reference numeral 20 denotes a belt conveyor that conveys the fine powder-containing fiber aggregate 21 falling from between the sweeper brushes 5 and 6 upward. It is directed toward the center from above the third rotating body 25 provided. Reference numeral 26 denotes a biting belt conveyor disposed approximately parallel to the vertical portion 20' of the belt conveyor 20, and a belt conveyor 26 is provided between the guide rollers 23 and 27 at the tip and the needle-like protrusion 24 of the third rotating body 25. A pair of biting rollers 28 and 29 are arranged, 28 being fixed and 29 being constantly pressed in the direction of one biting roller 28 by a spring arranged on the side. Biting roller 2
The gap between 8, 29 and the needle-like protrusion 24 is about 0.5 cm. A casing 30 is disposed from the biting roller 28 toward the lower right side along the outer periphery of the third rotary body 25 in the rotational direction, and further extends to the lower left side of the fourth rotary body 33, which has a large number of needle-shaped protrusions 32 protruding from its surface. A passage 31 is formed through which the fine powder-containing fiber aggregate is scattered, and the passage 31 is gradually widened. Reference numeral 34 denotes a hopper containing fine powder 35 similar to that described above, and a third rotary body 25 is conveyed by a belt conveyor 36 below.
and a fourth rotating body 33, 39 is a gate that controls the supply amount by vertical adjustment, and 40 is a cylindrical sleeve with a slit in the longitudinal direction, which rotates in the direction of the arrow to scatter the fine powder. The auxiliary member 37 is an auxiliary conveyor.

Next, the effect will be explained. The short fiber aggregates 8 supplied to the belt conveyor 9 are held down by the auxiliary belt conveyor 19 and fed from above between the vertical part 9' of the belt conveyor 9 and the biting belt conveyor 12, and are passed between the two. be forcibly deported. During this time, the flocculent aggregate of short fibers of about 3 to 10+ seconds is pinched by the guide roller 11.13 at the tip and continuously sent out. Then, the flocculent aggregates sent out are successively held securely between biting rollers 14 and 15, and are initially opened by the needle-like protrusions 2 of the first rotating body 1 and dispersed into single fibers. While adhering to the needle-like protrusion 2, it is sent to a portion facing the second rotating body 3 according to the direction of rotation thereof. At the same time, the fine powder 17 is also dropped by the belt conveyor 18 onto the opposing portion of the first rotating body 1 and the second rotating body 3. The circumferential speed of the first rotating body 1 is 2 m/s, and the circumferential speed of the second rotating body is about 1/10 of that, 0.245-/s. The continuously supplied single fibers are mixed with the fine powder 17, spread and dispersed by the needle-like projections 4 of the second rotating body 3, and fall between the first sweeper brush 5 and the second sweeper brush 6. The single fibers remaining on the surfaces of the first rotating body 1 and the second rotating body 3 are brushed off by the first sweeper brush 5 and the second sweeper brush 6, respectively.
Furthermore, the single fibers attached to the first sweeper brush 5 are transferred to the surface of the second sweeper brush 6, which has a slower circumferential speed, and the remaining single fibers are accumulated on the surface of the third sweeper brush 7, which has a slower peripheral speed. Ru. Since the tips of the second sweeper brush 6 and the third sweeper brush 7 are interlocked to some extent, the accumulated fibers are cleaned again by the second sweeper brush 6, and do not accumulate more than a certain amount, causing trouble in continuous operation. Never. In addition, the distance between the tips of the opposing parts of the first sweeper brush 5 and the second sweeper brush 6 is extremely small and the circumferential speeds of both are different, and fine powder is mixed in, so the dispersion of the opened single fibers is difficult. This will be further promoted. The fine powder-containing fiber aggregate 21 thus dispersed into single fibers falls onto the belt conveyor 20 located below between the first sweeper brush 5 and the second sweeper brush 6 and is conveyed upward.

Most of the short fiber aggregates falling from between the first sweeper brush 5 and the second sweeper brush 6 are dispersed in the form of single fibers. Partly because the circumferential speed of the brushes 5 and 6 is slow, mixing with the fine powder cannot be said to be sufficient yet. The fine powder-containing fiber aggregate 21 on the belt conveyor 20 is conveyed upward, pressed upward by the auxiliary belt conveyor 37, and fed from above between the vertical section 20' and the biting belt conveyor 26, and is passed between the two. Forced to be deported. The fibers are then pinched by the guide rollers 23 and 27 at the tip and sent out continuously, and then further opened by the needle-like protrusions 24 of the third rotating body 25 while being securely held by the biting rollers 28 and 29. , decentralized. Furthermore, the dispersed single fibers contain the same fine powder 35 stored in the hopper 34 above the opposing portion of the third rotating body 25 and the fourth rotating body 33.
Supplied by a belt conveyor 36, the single fiber aggregate is scattered and mixed by a cylindrical sleeve 40, and the single fiber aggregate, together with the re-added fine powder, is moved through the passage by a strong air flow generated by the rotation of the third and fourth rotating bodies 25 and 33. While the fibers are scattered and rotated in the passage 31 and transferred through the gradually expanding passage 31, the fiber opening and dispersion are further promoted, and the mixture with the fine powder is completed before being sent to the next process. In the next step, the dry short fibers subjected to the agglomeration prevention treatment may be dropped into a mixer into which powdered raw materials such as cement or refractories are charged, and the two may be mixed and stirred. The same amount of the fine powder is dropped and mixed in from above the part facing the second rotary body, and powdered raw materials such as cement or refractories are supplied in fixed quantities from above the parts facing the third and fourth rotary bodies, and continuous manufacturing processing is performed. You can. In this way, it is possible to obtain a dry powder in which the short fibers are uniformly dispersed and mixed into powdered raw materials such as cement or refractories. [Example of mixing with powdered raw materials] ■. (1) Pitch-based carbon short fibers (length 3m) 5% (weight ratio) (2) Inorganic fine powder (silica fume, particle size 0.1μ to 1μ) 15% (〃) (3) Cement 80% (〃 )2. (1) Aramid short fibers (length 6m) 10% (weight ratio) (2) Inorganic fine fibers (alumina whiskers, diameter 0.01μ to 0.1μ) lO
% (〃) (3) Carbonation force (particle size lμ) 80% (〃) [Example when mixed with molded product raw material] (1) Pitch-based short carbon fiber (length 6 mm) 3% (weight ratio) (2) Inorganic fine powder (silica fume, particle size 0.1μ to 1μ) 9% (〃) (3) Cement 35% (〃) (4) Aggregate (silica sand No. 6) 53% (weight ratio) In addition, the fine powder is supplied to the belt conveyor 9 together with short fiber aggregates, or it is sprayed sequentially during the process of dispersing and falling into single fibers, or the fine powder is fed into a mixer where the fine powder is dispersed in the form of a mist. It is also possible to mix single fibers dispersed in (Effects) The present invention consists of (1) forcibly feeding aggregates of short fibers to a first rotating body having a large number of needle-like protrusions while sandwiching them between a pair of belt conveyors; While initial castle opening is performed by the protrusions, the first rotating body and a second rotating body having a large number of needle-like protrusions on the surface are arranged facing each other with a slight gap and with different circumferential speeds of the respective rotating bodies. The initially opened short fibers are fed between the two rotating bodies and passed through to open and disperse them, and during this process, fine powder or fine fibers are added to the dispersed fibers. The fine powder or the fiber aggregate containing fine fibers is then sandwiched between a pair of belt conveyors and forcibly fed to a third rotating body having a large number of needle-like protrusions, and the needles of the third rotating body The fibers are opened and dispersed in the passage formed by the casing disposed along the outer periphery of the third rotary body due to the firing, and are scattered and dispersed in the passage by the air flow generated by the rotation of the third and fourth rotary bodies. During the process, fine powder or fine fibers or powdered raw materials such as cement and refractories are mixed into the dispersed fibers to completely disperse and mix the short fiber aggregates into single fibers. How to distribute to. (2) A pair of belt conveyors are installed to forcibly transport the aggregates of short fibers toward a first rotating body having a large number of needle-like protrusions on the surface, and a large number of short fiber aggregates are provided on the surface facing the first rotating body. A second rotary body having needle-like protrusions of A pair of belt conveyors are installed to forcibly convey Kansen, dispersed and mixed fine powder, or fiber aggregates containing fine fibers through the gap between the bodies, and from the pair of biting rollers at the tips of the belt conveyors, Third
A casing is disposed along the outer periphery of the fourth rotating body in the rotational direction to form a passage for opening and dispersing the fine powder or fiber aggregate containing fine fibers, and during the process, the casing is A device for dispersing aggregates of short fibers into single fibers, which is equipped with a means for mixing fine powder or fine fibers or powdered raw materials such as cement and refractories into the material. (1) A pair of biting rollers are disposed between the tip of the pair of belt conveyors and the tip of the needle-like protrusion protruding from the surface of the rotating body.The aggregate of short fibers according to claim 2 is formed into a single fiber. Distributing device. (4) A first sweeper brush and a second sweeper brush are provided at the bottom of the first rotating body and the second rotating body, respectively, so that the spaces between the rotating body and the brushes bite into each other,
The opposing brushes are arranged with a slight gap, and
2. The third sweeper brush for the second sweeper brush is arranged so as to be slightly bitten into each other, and the circumferential speeds of the first sweeper brush, the second sweeper brush, and the third sweeper brush are sequentially slowed down. Since the gist of the present invention is an apparatus for dispersing aggregates of short fibers into single fibers, it has the following effects compared to the conventional technology.

■ A wide selection of processed fiber shapes and lengths, and a wide range of processing capabilities. ■ There is little damage to processed fibers, and the anti-agglomeration treatment effect is reliable in dry manufacturing. ■ It is easy to increase the rotation of the main drive part of the device, and the cost of the device can be reduced relative to efficiency.

■ Continuous manufacturing processing is possible by slightly changing the specifications.

Furthermore, by the method and apparatus of the present invention, it is possible to obtain dry powder in which short fibers such as carbon and aramid, which are said to be difficult to disperse, are uniformly dispersed and mixed into powdered raw materials such as cement or refractories. Using this as a base, a commonly used mixer is used to mix concrete, p. c. Concrete, cement mortar, refractory molded products, etc. can be easily molded or manufactured into products containing the above-mentioned short fibers to meet various needs.

[Brief explanation of drawings]

The figure is a front view of an embodiment of the apparatus of the present invention that performs the method of the present invention. 1... First rotating body 2... Needle-like projection 3... Second rotating body 4... Needle-like projection 5... First sweeper brush 6... Second sweeper brush 7... Third sweeper brush 8...Short fiber aggregate 9...Belt conveyor 9'...Vertical portions 10, 11.1 of belt conveyor 9
3... Guide roller 12... Belt conveyor for coughing 14.15... Biting roller 16.34... Hopper 17.35... Fine powder 18.36... Belt conveyor 20. ... Belt conveyor 20'... Vertical portion 21 of belt conveyor 20...
Fiber aggregates containing fine powder 22, 23. 27... Guide roller 24... Acicular protrusion 25... Third rotating body 26... Belt conveyor for biting 28. 29... Coughing roller 30...Casing 3l...Passage 38.39...Gauge for adjusting the amount of fine powder supplied 40...Sleeve plate for assisting fine powder scattering

Claims (1)

[Scope of Claims] (1) An aggregate of short fibers is sandwiched between a pair of belt conveyors and is forcibly fed to a first rotating body having a large number of needle-like protrusions. While performing initial opening with the protrusions, the first rotating body and the second rotating body having a large number of needle-like protrusions on the surface
By arranging the rotating bodies facing each other with a slight gap and with different circumferential speeds of the rotating bodies, and supplying the above-mentioned initially opened short fibers between the two rotating bodies and allowing them to pass through. The fibers are opened and dispersed, and during this process, fine powder or fine fibers are mixed into the dispersed fibers, and then this fine powder or fiber aggregate containing fine fibers is sandwiched between a pair of belt conveyors. while forcibly feeding it to a third rotating body having a large number of needle-like protrusions,
The fibers are opened and dispersed by the needle-like protrusions of the third rotary body into a passage formed by a casing disposed along the outer periphery of the third rotary body, and the fibers are spread through the passage by the rotation of the third and fourth rotary bodies. The short fibers are dispersed and rotated by the generated air flow, and during the process, fine powder or fine fibers or powdered raw materials such as cement and refractories are mixed into the dispersed fibers so that they are completely dispersed and mixed. A method of dispersing aggregates into single fibers. (2) A pair of belt conveyors are installed to forcibly convey short fiber aggregates toward a first rotating body having many needle-like protrusions on its surface, and A second rotating body having needle-like protrusions is disposed, and a means for mixing fine powder or fine fibers is provided, and the first and second rotating bodies are moved toward a third rotating body having a large number of needle-like protrusions on the surface. A pair of belt conveyors are installed to forcibly convey the fine powder or fiber aggregate containing fine fibers that has been opened and dispersed through the gap. A casing is disposed along the outer periphery of the third and fourth rotating bodies in the rotational direction to form a passage for opening, dispersing and mixing the fine powder or fiber aggregate containing fine fibers, and for dispersing and mixing the fine powder or fiber aggregates during the process. A device for dispersing aggregates of short fibers into single fibers, which is equipped with means for mixing fine powder or fine fibers or powdered raw materials such as cement and refractories into the fibers. (3) A single short fiber aggregate according to claim 2, wherein a pair of biting rollers is disposed between the tip of the belt conveyor and the tip of the needle-shaped protrusion protruding from the surface of the rotating body. A device that disperses the particles into different shapes. (4) A first sweeper brush and a second sweeper brush are placed at the bottom of the first rotating body and the second rotating body, respectively, so that the rotating body and the brushes bite into each other, and a slight gap is provided between the opposing brushes. Further, third sweeper brushes for the second sweeper brush are arranged so as to slightly bite each other, and the peripheral speeds of the first sweeper brush, second sweeper brush, and third sweeper brush are sequentially slowed down. An apparatus for dispersing short fiber aggregates into single fibers according to claim 2.