JP2023163467A - Production method of continuous sheet, and production apparatus of fiber - Google Patents

Abstract

To provide a production apparatus of a continuous sheet (fiber) regenerated from short fibers as raw material.SOLUTION: A production apparatus of a continuous sheet for use in fiber production includes a mixing/depositing unit for mixing raw material fibers and a resin to form a mixture and depositing the mixture to form a web, a compressor unit for compressing the web to form a sheet, and a shredder unit for shredding the sheet to form a continuous sheet.SELECTED DRAWING: Figure 1

Description

The present invention relates to a long sheet manufacturing device and a yarn manufacturing device.

Conventionally, as shown in Patent Document 1, a twisted elastic paper yarn includes a core thread, a splint thread, and a pressing thread, and the core thread contains an elastic thread that shrinks highly in hot water, and the splint thread contains a twisted elastic thread. The yarn is a paper slit yarn, and the holding yarn is a stretchable paper yarn, which is at least one yarn selected from a non-stretchable yarn and a stretchable yarn that shrinks highly in hot water.

JP 2015-140488 Publication

The above-mentioned paper yarn is made by paper-making, slitting, and twisting a relatively long fiber pulp (for example, softwood pulp, Manila hemp, mulberry tree, or mitsumata). However, there has been a problem in that it is difficult to manufacture yarn using relatively short fibers (fibers obtained from waste paper, recycled chemical fibers, synthetic fibers, etc.).
Further, when yarn is normally manufactured using paper rolls manufactured by a paper manufacturer, the weight of the paper rolls is on the order of several tons, and it is difficult to change the material midway. On the other hand, in the apparel industry, the amount of yarn required for one garment ranges from several hundred grams to one kilogram. Therefore, a device that can handle high-mix, low-volume production is desired.

The long sheet manufacturing device is a long sheet manufacturing device used for manufacturing yarn, and includes a mixing/depositing section that mixes raw material fibers and resin, generates a mixture, and deposits it to form a web. a pressing section that compresses the web to form a sheet; and a shredding section that shreds the sheet to form a long sheet.

The yarn manufacturing device includes: a mixing/depositing section that mixes raw material fibers and resin to produce a mixture and deposits it to form a web; a pressurizing section that compresses the web to form a sheet; It includes a shredding section that shreds the sheet to form a long sheet, and a twisting section that twists the long sheet to form a thread.

FIG. 1 is a schematic diagram showing the configuration of a long sheet manufacturing apparatus according to a first embodiment. FIG. 1 is a schematic diagram showing a partial configuration of a separation drum according to the first embodiment. FIG. 1 is a schematic diagram showing a partial configuration of a deposition drum according to a first embodiment. FIG. 3 is a schematic diagram showing a partial configuration of another deposition drum according to the first embodiment. 1 is a flowchart showing a method for manufacturing a long sheet according to the first embodiment. FIG. 2 is a schematic diagram showing the configuration of a yarn manufacturing apparatus according to a second embodiment. 7 is a flowchart showing a method for manufacturing yarn according to a second embodiment.

1. First Embodiment First, the configuration of the long sheet manufacturing apparatus 1 will be described. The long sheet manufacturing device 1 is a device that manufactures a narrow long sheet Sa for use in yarn manufacturing.
As shown in FIG. 1, the long sheet manufacturing apparatus 1 includes, for example, a coarse crushing section 10, a dry defibration section 20, a sorting section 30, a sorted material conveying section 40, a resin supplying section 50, and a mixing/defibrating section 10. It includes a deposition section 60, a pressure section 90, a heating section 100, a shredding section 110, and a winding section 120.

The crushing section 10 shreds the supplied raw material into small pieces in air such as the atmosphere. The shape and size of the strips are, for example, several cm square. The coarse crushing section 10 has a coarse crushing blade 14, and the coarse crushing blade 14 shreds the input raw material. As the coarse crushing section 10, for example, a shredder can be used. The raw material shredded by the coarse crushing section 10 is received by a hopper 16 and then transferred to a dry defibration section 20 via a pipe 17.

Here, the raw materials supplied to the crushing section 10 are woven fabrics, nonwoven fabrics, filters, etc. containing various types of fibers. When supplying these raw materials to the crushing section 10, it is preferable to supply the raw materials in a dried state.
The fibers constituting the raw material include at least one of recycled fibers, synthetic fibers, chemical fibers, and natural fibers. In addition, each of the above-mentioned fibers may be used alone or may be mixed as appropriate.
Examples of recycled fibers or chemical fibers include counter cloth (manufactured by Kuraray Co., Ltd.), kitchen cloth, rayon, cupra, and the like.
Examples of synthetic fibers or chemical fibers include polyester, polyethylene, polypropylene, acrylic, nylon, and urethane.
Examples of natural fibers include animal fibers and vegetable fibers. Examples include wool, pulp, waste paper, old cloth, and silk.
Each fiber may be subjected to various surface treatments. Further, the material of the fiber may be a pure substance or may be a material containing a plurality of components such as impurities and other components. Note that the raw material may be a used product (recycled product) or an unused product (new product).

The fiber length of each raw material is not particularly limited, but each fiber is an independent fiber, and the length of the fiber along the longitudinal direction is approximately less than 20 mm. Usually, fibers having a fiber length of approximately 20 mm or more are used for manufacturing yarn. This is to ensure tensile strength. Therefore, it is difficult to use raw materials with a fiber length of less than 20 mm for yarn production because of their reduced tensile strength, and conventionally they have been discarded as fiber waste. The long sheet manufacturing apparatus 1 of this embodiment is configured to be able to manufacture a long sheet Sa to be used for yarn manufacturing using such raw materials of fibers having a relatively short fiber length. In other words, raw materials that were previously discarded can be reused, reducing the burden on the environment.

The dry defibration section 20 performs dry defibration to generate fibers. Here, processing such as defibration in air such as the atmosphere rather than in a liquid is referred to as a dry process. The material that has been defibrated in the dry defibrator 20 is referred to as a defibrated material. As the dry defibration section 20, for example, an impeller mill is used. The dry defibration section 20 has a function of generating an airflow that sucks the raw material and discharges the defibrated material. Thereby, the dry defibration section 20 can suck the raw material from the inlet 22 along with the airflow using the airflow generated by itself, perform the defibration process, and transport the defibrated material to the discharge port 24 . The defibrated material that has passed through the dry defibration section 20 is transferred to the sorting section 30 via the pipe 28. Note that the airflow for conveying the defibrated material from the dry defibration unit 20 to the sorting unit 30 may be generated by using the airflow generated by the dry defibration unit 20, or by providing an airflow generating device such as a blower. Air currents may also be used.

The sorting section 30 introduces the defibrated material defibrated by the dry defibrating section 20 through an inlet 32 and sorts it according to the length of the fibers. The sorting section 30 includes a separation drum 31 and a housing section 33 that accommodates the separation drum 31. The separation drum 31 is for sorting fibers by fiber length, and uses, for example, a sieve. As shown in FIG. 2, the separation drum 31 has a mesh, that is, a plurality of openings 31a. The opening 31a is a circular through hole. Then, fibers or particles smaller than the opening size of the mesh, that is, the first sorting material passes through the mesh, and fibers or particles larger than the opening size of the mesh, undisintegrated pieces and lumps, that is, the second sorting material that does not pass through the mesh. You can separate things. The first sorted object is transferred to the sorted object transport section 40. The second sorted material is returned to the hopper 16 from the discharge port 34 via the pipe 36, and is again introduced into the dry defibration section 20. The separation drum 31 is a cylindrical sieve that is rotationally driven by a motor. As the mesh for the separation drum 31, for example, a wire mesh, expanded metal made by stretching a metal plate with cuts, or punched metal made by forming holes in a metal plate using a press or the like is used.

The sorted material transport section 40 deposits the first sorted material sorted by the sorting section 30 and transports it downstream. The sorted material conveying section 40 includes a mesh belt 46, a tension roller 47, and a suction mechanism 48.

The suction mechanism 48 can suck the first sorted material dispersed in the air by the separation drum 31 onto the mesh belt 46 . The first sort is deposited on the moving mesh belt 46.

The mesh belt 46 is stretched by a tension roller 47, and has a configuration that allows air to pass through it but not easily through the first sorted material. The mesh belt 46 moves as the tension roller 47 rotates. While the mesh belt 46 is continuously moving, the first sorted materials that have passed through the sorting section 30 are continuously piled up.

The suction mechanism 48 is provided below the mesh belt 46. The suction mechanism 48 can generate a downward airflow. The first sorted material dispersed in the air by the sorting section 30 can be sucked onto the mesh belt 46 by the suction mechanism 48 . Thereby, the discharge speed from the sorting section 30 can be increased.

The first sorted material deposited on the mesh belt 46 is conveyed downstream. The first sorted material is put into a hopper 55 arranged near the tension roller 47a located downstream in the conveyance path of the first sorted material of the mesh belt 46.
Note that a blade 49 is arranged on the downstream side of the tension roller 47a of the mesh belt 46. The width of the blade 49 is approximately the same as the width of the mesh belt 46. The blade 49 peels off the first sorted material adhering to the mesh belt 46 from the mesh belt 46. The first sorted material stripped off by the blade 49 is thrown into a hopper 55. The first sorted material placed in the hopper 55 is transferred to the mixing/depositing section 60 via the pipe 56.

A resin supply section 50 that supplies resin is arranged between the sorting section 30 and the mixing/deposition section 60. Resin is introduced into the hopper 55 through the supply port 52 of the resin supply section 50 . As a result, the first sorted material and the resin are transferred to the mixing/depositing section 60 via the pipe 56. Note that the first sorted material and the resin may be transferred using a blower or the like.

The resin supply unit 50 supplies resin for binding the fibers together. The resin is a thermoplastic resin or a thermosetting resin, such as AS resin, ABS resin, polypropylene, polyethylene, polyvinyl chloride, polystyrene, acrylic resin, polyester resin, polyethylene terephthalate, polyphenylene ether, polybutylene terephthalate, polyamide, These include polycarbonate, polyacetal, polyphenylene sulfide, polyether ether ketone, etc. Furthermore, biodegradable resins such as PLA resin, PBS resin, and PLA-PBS core-sheath resin are also applicable. These resins may be used alone or in an appropriate mixture. That is, the additive may contain a single substance or may be a mixture, each consisting of a single substance or a plurality of substances.

The resin is melted by heating and binds the plurality of fibers together. Therefore, if the resin and fibers are mixed and not heated to a temperature at which the resin melts, the fibers will not bind to each other.

Note that the resin may be in the form of powder or fiber, but preferably has a core-sheath structure. In this case, for example, the polyethylene is arranged around the polyester. Then, the polyethylene is dissolved and the fibers are bonded together via the polyester. Since the fibers are bound to each other with the polyester core interposed, the tensile strength between the fibers can be improved. When the resin has a core-sheath structure, it is preferable that the resin supply unit 50 appropriately adopt a mechanism that prevents resin from clogging when supplying the resin.

The mixing/depositing section 60 introduces the first sorted material of the raw material and the resin from the inlet 72, and mixes the first sorted material (fiber) and the resin to produce a mixture. The fibers contained in the mixture are then loosened and dispersed in the air as it falls. Furthermore, when the resin supplied from the resin supply section 50 has a fibrous shape or a core-sheath structure, the mixing/depositing section 60 loosens the resin contained in the mixture. Then, the mixing/depositing section 60 deposits the mixture of the first sorted material and the resin with good uniformity to form the web W.

The mixing/deposition section 60 has a deposition drum 71 and a housing section 73 that accommodates the deposition drum 71. The deposition drum 71 is a cylindrical sieve that is rotationally driven by a motor. As the deposition drum 71 rotates, the first sorted material and the resin are mixed to form a mixture. As shown in FIG. 3A, the deposition drum 71 has a mesh, that is, a plurality of openings 71a. The openings 71a are elongated through holes, and the openings 71a are arranged in a staggered manner. That is, in this embodiment, the shape of the opening 31a of the separation drum 31 and the shape of the opening 71a of the deposition drum 71 are different. The deposition drum 71 functions as a sieve. Then, the deposition drum 71 allows fibers and particles with smaller mesh openings to pass through, and deposits the mixture. By forming the opening 71a of the deposition drum 71 into a long hole, fibers and resin having a core-sheath structure can be easily deposited.
Note that, as shown in FIG. 3B, the openings 71b of the deposition drum 71 may be arranged in a herringbone shape. Even in this case, fibers and resin having a core-sheath structure can be easily deposited.

Further, the mixing/depositing section 60 includes a mesh belt 82, a roller 84, and a suction mechanism 86. Mesh belt 82 is arranged below deposition drum 71 . The suction mechanism 86 can generate a downward airflow. The mixture dispersed in the air by the deposition drum 71 can be sucked onto the mesh belt 82 by the suction mechanism 86 . Thereby, the discharge speed from the deposition drum 71 can be increased. Furthermore, the suction mechanism 86 can form a downflow in the falling path of the mixture, and can prevent the fibers and resin from becoming entangled while falling. The mixture that has passed through the deposition drum 71 is deposited on the mesh belt 82 to form the web W.

The mesh belt 82 is an endless belt, and is stretched around a plurality of rollers 84. Due to the rotation of the rollers 84, the mesh belt 82 moves continuously, and the web W is conveyed downstream. The mesh belt 82 is made of, for example, metal, resin, cloth, nonwoven fabric, or the like. The surface of the mesh belt 82 is composed of a net lined with openings of a predetermined size. Among the fibers and particles falling from the deposition drum 71, fine particles with a size that can pass through the meshes fall below the mesh belt 82, and fibers and resins with a size that cannot pass through the meshes are deposited on the mesh belt 82. , and are conveyed in the downstream direction as the mesh belt 82 moves.

A pressurizing section 90 is arranged downstream of the mixing/depositing section 60. The pressure unit 90 compresses the web W. Further, a heating section 100 is arranged downstream of the pressurizing section 90. In the pressurizing section 90 and the heating section 100, by heating the web W in a compressed state, the resin is melted, and the fibers can be bound together via the resin. Thereby, the sheet S is formed.
Note that the mixing/deposition section 60 may be configured as one unit, or may be configured as two units in which the mixing section and the deposition section are separated.

The pressing unit 90 is composed of a pair of calender rollers 91, and presses the web W by sandwiching it with a predetermined nip pressure. The web W is compressed by being pressurized, the thickness of the web W is reduced, and the density of the web W is increased. One of the pair of calendar rollers 91 is a driving roller driven by a motor (not shown), and the other is a driven roller. The calendar roller 91 is rotated by the driving force of the motor and conveys the web W, which has become denser due to pressure, toward the heating section 100 .

The heating section 100 includes a pair of heating rollers 101. The heating roller 101 is heated to a preset temperature by a heater installed inside or outside. The heating rollers 101 sandwich the web W compressed by the calendar roller 91 and apply heat to form the sheet S. Note that the heating unit 100 may be configured by, for example, a hot press molding machine, a hot plate, a warm air blower, an infrared heater, a flash fixing device, or the like.

One of the pair of heating rollers 101 is a driving roller driven by a motor (not shown), and the other is a driven roller. The heating roller 101 is rotated by the driving force of the motor and conveys the formed sheet S toward the shredding section 110 .

The shredding unit 110 shreds the sheet S to form a long sheet Sa. That is, a long sheet Sa having a narrow width and a long length is formed. For the shredding section 110, for example, a shear slit type slitter or a gang slit type slitter can be used, but it is preferable to use a gang slit type slitter. The gang slit type slitter can suppress the occurrence of sagging on both cut surfaces of the long sheet Sa.

The shredding section 110 includes an upper blade 111 and a lower blade 112. The upper blade 111 is rotated by the driving force of a motor or the like. The sheet S is passed between the upper blade 111 and the lower blade 112, and the sheet S is cut by meshing the upper blade 111 and the lower blade 112. The sheet S is continuously cut along the conveyance direction.
A plurality of pairs of the upper blade 111 and the lower blade 112 are arranged in the width direction of the sheet S. The interval between the upper blades 111 is set according to the width dimension of the long sheet Sa to be formed. Each lower blade 112 is arranged in accordance with each upper blade 111.
Note that the distance between the upper blades 111 (the distance between the lower blades 112) may be uniform or may be different. It can be appropriately set according to the width dimension of the long sheet Sa to be formed. Thereby, long sheets Sa having different width dimensions can be manufactured at the same time.
Here, the long sheet Sa is a long sheet having a width dimension of about 1 mm to 15 mm, for example. However, the width dimension is not limited to this.
Note that both end portions of the sheet S shredded by the shredding section 110 do not have a constant width dimension, so they do not become a long sheet Sa. It will be reinserted. On the other hand, the long sheet Sa is conveyed to the winding section 120.

The winding unit 120 winds up the formed long sheet Sa to form a rolled body (ribbon).
The winding unit 120 includes a rotating shaft and is configured to be rotatable about the rotating shaft. Then, a core for winding up the long sheet Sa is set on the rotating shaft, and the rotating shaft is rotated with the most downstream end of the long sheet Sa attached to the core. The width dimension of the core portion is approximately the same as the width dimension of the long sheet Sa. The core rotates as the rotating shaft rotates, and the long sheet Sa is wound around the core to form a ribbon. Then, remove the ribbon from the rotating shaft.
Through the above steps, the long sheet Sa is formed. Note that the yarn can be manufactured by separately twisting the long sheet Sa using a twisting section or the like.

Next, a method for manufacturing the long sheet Sa will be explained.
In addition, in this embodiment, the manufacturing method of long sheet Sa by the long sheet manufacturing apparatus 1 is demonstrated.

As shown in FIG. 4, in the raw material fiber production step (step S11), the raw material is defibrated to produce fibers.
Raw materials include woven fabrics, nonwoven fabrics, filters, etc. containing various fibers. The fibers constituting the raw material include at least one of recycled fibers, synthetic fibers, chemical fibers, and natural fibers.
In this embodiment, raw material fibers are generated by simultaneously defibrating a first material containing chemical fibers, synthetic fibers, or regenerated fibers and a second material consisting of natural fibers.
For example, a counter cloth (manufactured by Kuraray Co., Ltd.) as a first material and waste paper as a second material are simultaneously defibrated by the dry defibration section 20 to generate raw material fibers. By defibrating the counter cloth and waste paper at the same time, the stickiness of the resin contained in the counter cloth is suppressed by the fibers contained in the waste paper, and the defibration process can be performed reliably. Note that the counter cloth may be washed and dried before defibration.

Next, in the mixture generation step (step S12), raw material fibers and resin are mixed in a gas to generate a mixture.
Specifically, the fibers defibrated by the dry defibration section 20 and the resin supplied from the resin supply section 50 are mixed by the deposition drum 71 of the mixing/deposition section 60 . Note that the resin supplied from the resin supply section 50 preferably has a core-sheath structure. In this case, the resin is constructed such that, for example, polyethylene surrounds polyester.

Next, in the web forming step (step S13), the mixture is deposited to form the web W.
Specifically, by rotating the deposition drum 71, the fibers and resin contained in the mixture are dispersed and rained down through the openings 71a (71b) of the deposition drum 71. The mixture that has passed through the openings 71a (71b) is deposited on the mesh belt 82 to form the web W.
Since the shape of the opening 71a (71b) of the deposition drum 71 is a long hole or a herringbone shape, fibers and resin having a core-sheath structure can efficiently pass therethrough and can be deposited easily.

Next, in a sheet forming step (step S14), the web W is compressed to form a sheet S. Specifically, the sheet S is formed by compression of the web W by the pressure unit 90 and heating by the heating unit 100 .

Next, in a long sheet forming step (step S15), the sheet S is shredded to form a long sheet Sa. Specifically, the sheet S is cut (shredded) into desired width dimensions by the shredding section 110. For example, the sheet S is cut into pieces with a width of 10 mm. As a result, a narrow and elongated long sheet Sa is manufactured.
The long sheet Sa shredded by the shredding section 110 is wound up by the winding section 120 to form a plurality of ribbons. Note that the yarn can be manufactured by separately twisting the long sheet Sa using a twisting section or the like.

In addition, in this embodiment, the counter cloth and waste paper are simultaneously defibrated to generate fibers to form the sheet S, but the present invention is not limited thereto.
For example, the sheet S may be formed by defibrating a synthetic woven fabric of rayon or cupro to generate raw material fibers.
Alternatively, the sheet S may be formed by defibrating a polyester filter to generate raw material fibers.
Alternatively, the sheet S may be formed by defibrating a polypropylene nonwoven fabric to generate raw material fibers.
Alternatively, the sheet S may be formed by defibrating waste paper to generate raw material fibers. In this case, the amount of resin supplied is increased. Thereby, a sheet S with high tensile strength can be formed. Further, when the sheet S is formed by defibrating waste paper to generate raw material fibers, the surface of the sheet S may be subjected to surface treatment by spraying a urethane emulsion onto the surface of the sheet S. In this case, for example, a spraying section that sprays the urethane emulsion is disposed between the heating section 100 and the shredding section 110. Thereby, the tensile strength of the sheet S (long sheet Sa) can be increased.

As described above, according to the present embodiment, even if the raw material is a fiber having a relatively short fiber length, the strength between the fibers increases by forming it into a sheet using the long sheet manufacturing apparatus 1, making it suitable for yarn manufacturing. A long sheet Sa can be provided. In addition, raw materials with short fiber lengths that were conventionally discarded can be reused, reducing environmental impact.

2. Second Embodiment Next, a second embodiment will be described.
First, the configuration of the yarn manufacturing device 2 will be explained. The yarn manufacturing device 2 is a device that manufactures yarn T.
As shown in FIG. 5, the yarn manufacturing apparatus 2 includes, for example, a coarse crushing section 10, a dry defibration section 20, a sorting section 30, a sorted material conveyance section 40, a resin supply section 50, and a mixing/deposition section. 60, a pressing section 90, a heating section 100, a shredding section 110, and a twisting section 130.
Note that the configuration of the yarn manufacturing device 2 other than the twisting section 130 is the same as that of the first embodiment, so a description thereof will be omitted.

The twisting section 130 forms a thread T by twisting the long sheet Sa formed by the shredding section 110. The yarn twisting section 130 includes, for example, a double twister, an Italian type yarn twister, an Atwood type yarn twister, a pirn yarn feed up twister, a ring twister, a combination twister, and the like.

Next, a method for manufacturing the thread T will be explained.
In this embodiment, a method for manufacturing yarn T using the yarn manufacturing device 2 will be described.

As shown in FIG. 6, the method for manufacturing yarn T includes a raw material fiber production step (step S21) in which raw materials are defibrated to produce fibers, and a raw material fiber and resin are mixed in a gas to produce a mixture. a web forming step (step S23) of depositing the mixture and forming the web W; a sheet forming step (step S24) of compressing the web W to form the sheet S; The process includes a long sheet forming step (step S25) of cutting S into long sheets to form long sheets Sa, and a thread forming step (step S26) of forming threads by twisting the long sheets Sa.
Note that steps S21 to S25 in this embodiment are the same as steps S11 to S15 in the first embodiment, so the explanation will be omitted.

In the yarn forming step (step S26), the long sheet Sa formed by the shredding section 110 is twisted by the twisting section 130 to form a yarn T.
Through the above steps, the thread T is manufactured.

As described above, according to this embodiment, in addition to the effects of the first embodiment, the following effects can be obtained.
In the yarn manufacturing apparatus 2, the process from starting raw materials to forming the yarn T can be carried out in an integrated line. Further, when yarn is manufactured using paper rolls manufactured by a paper manufacturer as a material, the weight of the paper roll is usually on the order of several tons, making it difficult to change the material during processing. However, in this embodiment, it is possible to manufacture the thread T from a small amount of raw materials. That is, in the apparel industry, the amount of yarn T required for one garment ranges from several hundred grams to 1 kg, so it is possible to handle high-mix, low-volume production.

DESCRIPTION OF SYMBOLS 1... Long sheet manufacturing device, 2... Yarn manufacturing device, 10... Crushing part, 20... Dry defibration part, 30... Sorting part, 31... Separation drum, 31a... Opening, 32... Inlet, 33... Housing part , 34... Discharge port, 40... Sorted material conveyance section, 46... Mesh belt, 50... Resin supply section, 52... Supply port, 60... Mixing/deposition section, 71... Deposition drum, 71a... Opening, 71b... Opening, 72 ...Introduction port, 73...Housing part, 82...Mesh belt, 90...Pressure part, 91...Calendar roller, 100...Heating part, 101...Heating roller, 110...Shredding part, 111...Upper blade, 112...Lower blade , 120... Winding section, 130... Twisting section, W... Web, S... Sheet, Sa... Long sheet, T... Yarn.

Claims (11)

A long sheet manufacturing device used for yarn manufacturing,
a mixing/depositing section that mixes raw material fibers and resin to generate a mixture and deposits it to form a web;
a pressing unit that compresses the web to form a sheet;
A long sheet manufacturing apparatus, comprising: a shredding section that shreds the sheet to form a long sheet. a mixing/depositing section that mixes raw material fibers and resin to generate a mixture and deposits it to form a web;
a pressing unit that compresses the web to form a sheet;
a shredding section that shreds the sheet to form a long sheet;
A yarn manufacturing device comprising: a yarn twisting section that forms yarn by twisting the elongated sheet. The long sheet manufacturing apparatus according to claim 1,
An apparatus for manufacturing a long sheet, further comprising a dry defibration section that defibrates the raw material to produce the fibers. The long sheet manufacturing apparatus according to claim 3,
An apparatus for manufacturing a long sheet, comprising a separation drum for sorting the fibers according to fiber length on the downstream side of the dry defibration section. The long sheet manufacturing apparatus according to claim 1,
The mixing/depositing section is a long sheet manufacturing apparatus, wherein the mixing/depositing section mixes the fibers and the resin and has a depositing drum on which the mixture is deposited. The long sheet manufacturing apparatus according to claim 1,
a dry defibration unit that defibrates the raw material to produce the fibers;
a separation drum for sorting the fibers by fiber length on the downstream side of the dry defibration section;
The mixing/deposition section includes a deposition drum that mixes the fibers and the resin and deposits the mixture,
A long sheet manufacturing apparatus, wherein the opening shape of the separation drum and the opening shape of the deposition drum are different. The long sheet manufacturing apparatus according to claim 6,
A long sheet manufacturing apparatus, wherein a resin supply section that supplies the resin is disposed between the separation drum and the deposition drum. The yarn manufacturing device according to claim 2,
A yarn manufacturing apparatus further comprising a dry defibration section that defibrates the raw material to produce the fibers. The yarn manufacturing device according to claim 8,
A yarn manufacturing apparatus, comprising a separation drum downstream of the dry defibration section for sorting the fibers according to fiber length. The yarn manufacturing device according to claim 2,
The mixing/depositing section is a yarn manufacturing apparatus, wherein the mixing/depositing section mixes the fibers and the resin and has a depositing drum on which the mixture is deposited. The yarn manufacturing device according to claim 2,
a dry defibration unit that defibrates the raw material to produce the fibers;
a separation drum for sorting the fibers by fiber length on the downstream side of the dry defibration section;
The mixing/deposition section includes a deposition drum that mixes the fibers and the resin and deposits the mixture,
A yarn manufacturing apparatus, wherein the opening shape of the separating drum and the opening shape of the depositing drum are different.

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