WO2018105322A1

WO2018105322A1 - Sheet manufacturing device, sheet manufacturing method, device for manufacturing pulp derived product, and method for manufacturing pulp derived product

Info

Publication number: WO2018105322A1
Application number: PCT/JP2017/040747
Authority: WO
Inventors: 細見　浩昭
Original assignee: セイコーエプソン株式会社
Priority date: 2016-12-06
Filing date: 2017-11-13
Publication date: 2018-06-14
Also published as: JP2018090931A

Abstract

The purpose of the present invention is to provide a sheet manufacturing device and manufacturing method that allow increasing freedom of materials to be procured. This sheet manufacturing device is provided with: a raw material supply unit for supplying raw material; a breaker unit for breaking the raw material and forming raw material fiber; and a pressure applying unit for applying pressure to a deposit wherein the raw material fibers are deposited, in the direction of the thickness thereof. A sterilization unit is provided between the breaking unit and the pressure applying unit.

Description

Sheet manufacturing apparatus, sheet manufacturing method, pulp-derived product manufacturing apparatus, and pulp-derived product manufacturing method

The present invention relates to a sheet manufacturing apparatus, a sheet manufacturing method, a pulp-derived product manufacturing apparatus, and a pulp-derived product manufacturing method.

Paper recycling has become widespread from the viewpoint of resource utilization, but in the past, accumulated waste paper has been industrially produced as recycled paper, and its method is called so-called wet processing. Regenerated pulp produced by disaggregation with water was formed on recycled paper (Patent Document 1).

古 Collected waste paper is discharged after being used in various ways, and it is not easy to sort the state of breakage or contamination. In particular, waste paper contaminated with bacteria cannot be visually judged and eliminated, and it must be avoided to supply the consumer with bacteria attached to recycled paper regenerated from the waste paper.

In that respect, Patent Document 1 generates a sterilized recycled pulp by adding an antibacterial agent, a sterilizing agent, a bactericidal agent, etc. as one of additives to the waste paper disaggregation water stored in the pulp adjusting unit, It is disclosed to suppress the remaining of contaminants such as bacteria on recycled paper.

However, environmental loads such as heavy use of water resources in wet recycled paper production and transportation of accumulated used paper in industrial recycled paper production with large equipment were large. Therefore, there is a dry recycled paper manufacturing device that does not use water as a technology for forming recycled paper in the office and forming paper that has been printed and discarded in the office in recent years into recycled paper and putting it into the printing machine as printing paper. (Patent Documents 2 to 4).

JP2015-227523A JP-A-7-175384 JP-A-10-171318 JP 2008-33034 A

Patent Documents 2 to 4 that disclose dry-type recycled paper manufacturing apparatuses do not disclose sterilization means as disclosed in Patent Document 1. However, the sterilization means using a large amount of water as disclosed in Patent Document 1 cannot be applied as it is. A conventional dry-type recycled paper manufacturing apparatus can be said to be a technology applied to a premise that uses used paper as a material, which is maintained in a relatively hygienic state, such as paper used in an office environment. Then, it aims at obtaining the sheet manufacturing apparatus and manufacturing method which make it possible to raise the freedom degree of the material to procure.

The present invention has been made to solve at least a part of the problems described above, and can be realized as the following forms or application examples.

[Application Example 1] In the sheet manufacturing apparatus of this application example, a raw material supply unit that supplies a raw material, a defibrating unit that defibrates the raw material to form raw material fibers, and a deposit on which the raw material fibers are deposited A pressurizing unit that pressurizes in the direction, and a sterilizing unit is provided between the defibrating unit and the pressurizing unit.

According to the sheet manufacturing apparatus of the present application example, the sheet manufacturing apparatus of the present application example has deposited the raw fiber and the defibrating unit that defibrates the used paper as the raw material, that is, the used paper to form the raw fiber. An apparatus for producing so-called dry-type recycled paper, comprising a pressurizing unit that pressurizes the deposit in the thickness direction. Waste paper used as a raw material is used and discharged in various usage environments, and it can be said that it is extremely difficult to obtain waste paper sorted according to the level of bacterial contamination.

Therefore, according to the sheet manufacturing apparatus of this application example, even after obtaining used paper as a raw material from a wide range of suppliers, before the raw fiber from which the used paper has been defibrated is input to the pressure unit where the recycled fiber is formed on the recycled sheet It can sterilize in the sterilization part arranged in the. And the sterilized raw material fiber can be formed in a reproduction | regeneration sheet | seat by a pressurization part. That is, it is possible to obtain used paper that is a raw material that is not limited to a supplier. And since the sheet | seat reproduced | regenerated from the used paper is obtained in the sterilized state, the risk of bacterial infection to the user can be reduced. In other words, it is possible to obtain a recycled sheet with improved safety compared to the conventional case.

Application Example 2 In the application example described above, the sterilization unit includes a conveying unit that conveys the raw fiber from the defibrating unit to the pressurizing unit.

According to the above application example, the raw fiber formed by the defibrating unit can be sterilized by the sterilizing unit while being conveyed to the pressurizing unit by the conveying unit. That is, an apparatus that enables continuous sterilization can be obtained.

Application Example 3 In the application example described above, the sterilization unit includes a light irradiation unit that irradiates a sterilization line.

According to the application example described above, the raw fiber can be easily sterilized by irradiating the raw fiber with a sterilization line which is a light beam having a sterilizing power. As the sterilizing line, a light beam having a wavelength of around 260 nm, so-called ultraviolet rays can be used.

Application Example 4 In the application example described above, the sterilization unit includes a liquid discharge unit that discharges a bactericide solution.

According to the above-described application example, the liquid bactericidal chemical solution can penetrate into the inside of the raw material fiber deposit even in a form in which the raw material fiber before being put into the pressurizing unit is deposited, and is high. A bactericidal effect can be obtained.

Application Example 5 In the application example described above, the sterilization unit includes a water vapor injection unit that injects water vapor heated to a sterilizable temperature.

Boil sterilization known as a conventional sterilization method is a method of sterilizing by immersing in boiling water, so-called boiling water of 100 ° C. According to the application example described above, since steam can be heated to a temperature equal to or higher than the boiling point of water, the raw fiber can be sterilized using readily available water. In addition, sterilization can be performed up to the inside of the raw material fiber deposit by spraying water vapor through the raw material fiber deposit.

Application Example 6 In the application example described above, the sterilization unit includes a humidification unit that humidifies the raw material and a microwave irradiation unit that irradiates microwaves.

According to the application example described above, the raw material fibers can be heated by adding moisture to the raw material in advance and heating the water molecules with microwaves. So-called heat sterilization can be easily performed. In addition, since the raw material fibers before being put into the pressurizing part are in a deposited form, moisture penetrates to the inside of the raw material fiber deposit, and can be heated to the inside of the raw material deposit. A high bactericidal effect can be obtained.

[Application Example 7] The sheet manufacturing method of this application example includes a raw material supply step for supplying raw materials, a defibrating step for defibrating the raw materials to form raw material fibers, a sterilization step for sterilizing the raw material fibers, It includes a deposition step of depositing the raw material fibers to form a deposit, and a pressurizing step of pressing the deposit in the thickness direction.

The sheet manufacturing method of this application example includes a used paper as a raw material, that is, a defibrating step for defibrating waste paper to form raw material fibers, a sterilizing step for sterilizing raw material fibers, and a deposit in which raw material fibers are deposited. And a pressurizing step of pressurizing in the thickness direction, so-called dry-type recycled paper manufacturing method. Waste paper used as a raw material is used and discharged in various usage environments, and it can be said that it is extremely difficult to obtain waste paper sorted according to the level of bacterial contamination.

Therefore, according to the sheet manufacturing method of this application example, even if the used paper used as a raw material is obtained from a wide range of suppliers, the raw material fiber formed by the defibrating process of the used paper is sterilized in the sterilization process before the pressurizing process. And a sterilized recycled sheet can be obtained. That is, it is possible to obtain used paper that is a raw material that is not limited to a supplier. And since the sheet | seat reproduced | regenerated from the used paper is obtained in the sterilized state, the risk of bacterial infection to the user can be reduced. In other words, it is possible to obtain a recycled sheet with improved safety compared to the conventional case.

Application Example 8 In the application example described above, the sterilization step includes a conveyance step of conveying the raw fiber from the defibration step to the deposition step.

According to the above application example, the raw fiber formed in the defibration process can be sterilized by the sterilization process during the transfer to the pressurization process by the transport process. That is, the sterilization process which continued the sterilization process can be enabled.

Application Example 9 In the application example described above, the sterilization step includes a sterilization line irradiation step of irradiating the raw fiber with a sterilization line.

Application Example 10 In the application example described above, the sterilization step includes a disinfectant solution discharging step of discharging a disinfectant solution onto the raw material fibers.

According to the application example described above, even if the applied disinfectant is in a form in which the raw material fibers before being put into the pressurizing step are deposited, it can penetrate into the inside of the raw material fiber deposits, A high bactericidal effect can be obtained.

Application Example 11 In the application example described above, the sterilization step includes a water vapor injection step of injecting water vapor heated to a temperature at which the raw material fibers can be sterilized.

Application Example 12 In the application example described above, the sterilization step includes a humidification step of humidifying the raw material fibers and a microwave irradiation step of irradiating microwaves.

According to the above application example, moisture can be preliminarily contained in the raw material by the humidification step, and the raw material fibers can be heated by microwave heating of the water molecules in the microwave irradiation step. So-called heat sterilization can be easily performed. In addition, since the raw material fibers before being put into the pressurization process are in a deposited form, moisture penetrates into the raw material fiber deposits, and can be heated to the inside of the raw material deposits. A high bactericidal effect can be obtained.

[Application Example 13] A pulp-derived product manufacturing apparatus according to this application example includes a raw material supply unit that supplies raw materials, a defibrating unit that defibrates the raw materials to form raw material fibers, and a dispersion unit that disperses the raw material fibers. , And a sterilizing part is provided between the defibrating part and the dispersing part.

The pulp-derived product manufacturing apparatus of this application example is an apparatus for manufacturing a so-called dry-type recycled pulp having a defibrating unit that defibrates used paper as a raw material, that is, used paper to form raw material fibers. Waste paper used as a raw material is used and discharged in various usage environments, and it can be said that it is extremely difficult to obtain waste paper sorted according to the level of bacterial contamination.

Pulp-derived products refer to products manufactured using cellulose fiber pulp produced from plants such as wood as one of the raw materials. The pulp-derived product manufacturing apparatus of this application example is an apparatus that manufactures pulp supplied as one of product raw materials from sheet-shaped raw materials.

Therefore, according to the pulp-derived product manufacturing apparatus of this application example, even after obtaining used paper as a raw material from a wide range of suppliers, after defibrating the raw material fiber at the used paper defibrating unit, It can be sterilized in a state and put into the dispersion part. Therefore, the pulp regenerated from waste paper is obtained in a sterilized state. That is, it is possible to reduce the risk of bacterial infection to the user while making it possible to obtain used paper as a raw material that is not limited to the supplier. In other words, it is possible to obtain a regenerated pulp having improved safety as compared with the prior art. In particular, it can be suitably used for products that require strong hygiene management, such as sanitary products such as disposable diapers and water-absorbing pads, and sanitary products.

[Application Example 14] The pulp-derived product manufacturing method of this application example includes a raw material supply step for supplying raw materials, a defibrating step for defibrating the cut raw materials to form raw material fibers, and sterilizing the raw material fibers And a mixing step of dispersing the raw material fibers, wherein the sterilizing step includes a conveying step of conveying the raw material fibers from the defibrating step to the mixing step.

According to the pulp-derived product manufacturing method of this application example, even after obtaining used paper as a raw material from a wide range of suppliers, after defibrating the raw material fiber in the used paper defibrating process, the state of the raw material fiber in the sterilization process Can be sterilized and put into the mixing process. Therefore, the pulp regenerated from waste paper is obtained in a sterilized state. That is, it is possible to reduce the risk of bacterial infection to the user while making it possible to obtain used paper as a raw material that is not limited to the supplier. In other words, it is possible to obtain a regenerated pulp having improved safety as compared with the prior art. In particular, it can be suitably used for products that require strong hygiene management, such as sanitary products such as disposable diapers and water-absorbing pads, and sanitary products.

The lineblock diagram showing the schematic structure of the sheet manufacturing device concerning a 1st embodiment. The block diagram which shows schematic structure of the sheet manufacturing apparatus which concerns on 2nd Embodiment. The block diagram which shows schematic structure of the modification 1 of the sheet manufacturing apparatus which concerns on 2nd Embodiment. The block diagram which shows schematic structure of the modification 2 of the sheet manufacturing apparatus which concerns on 2nd Embodiment. The block diagram which shows schematic structure of the sheet manufacturing apparatus which concerns on 3rd Embodiment. The block diagram which shows schematic structure of the sheet manufacturing apparatus which concerns on 4th Embodiment. The block diagram which shows schematic structure of the pulp origin product manufacturing apparatus which concerns on 5th Embodiment. The flowchart which shows the sheet | seat manufacturing method which concerns on 6th Embodiment. The flowchart which shows the pulp origin product manufacturing method which concerns on 7th Embodiment.

Embodiments according to the present invention will be described below with reference to the drawings.

(First embodiment)
FIG. 1 is a configuration diagram showing a schematic configuration of a sheet manufacturing apparatus according to the first embodiment. A sheet manufacturing apparatus 1000 shown in FIG. 1 includes a manufacturing unit 1010 that forms used paper Pu as a raw material on recycled paper Pr, a control unit 110, and a raw material supply unit 200 that supplies used paper Pu as a raw material. The production unit 1010 includes a crushing unit 10, a defibrating unit 20, a sorting unit 30, a first web forming unit 40, a rotating body 45, a mixing unit 50, a depositing unit 60, and a second web forming unit. 70, a sheet forming unit 80, and a cutting unit 90.

The sorting unit 30 and the depositing unit 60 are devices that generate loosely dispersed pulp fibers on an air flow without using water and suck them on a wire mesh to generate a web. Such a processing method is called an airlaid method, and a processing machine is called an airlaid processing machine.

The raw material supply unit 200 supplies the used paper Pu to the crushing unit 10. The raw material supply unit 200 is, for example, an automatic input unit for continuously inputting used paper Pu to the crushing unit 10. The used paper Pu supplied by the raw material supply unit 200 is not limited to used paper, and may be any paper that includes fibers such as a pulp sheet.

The crushing unit 10 cuts the used paper Pu supplied from the raw material supply unit 200 into pieces by cutting it in the air. The shape and size of the strip is, for example, a strip of several cm square. In the illustrated example, the crushing unit 10 has a crushing blade 11, and the charged raw material can be cut by the crushing blade 11. As the crushing part 10, a shredder can be used, for example. The used paper Pu cut by the crushing unit 10 is received by a hopper 21 provided in the defibrating unit 20 and then transferred (conveyed) to the defibrating device unit 23 through the tube 22.

The defibrating device unit 23 defibrates the raw material cut by the crushing unit 10. Here, “defibrating” in the present specification refers to unwinding the used paper Pu as a material to be defibrated formed by binding a plurality of fibers into one fiber. The defibrating device section 23 also has a function of separating substances such as resin particles, ink, toner, and a bleeding inhibitor adhering to the raw material from the fibers.

The raw fiber formed after passing through the defibrating device 23 is referred to as “defibrated material”. In addition to the defibrated fibers that have been unraveled, the “defibrated material” includes resin particles (resins that bind multiple fibers together), ink, toner, etc. In some cases, additives such as colorants, anti-bleeding materials, and paper strength enhancing agents are included.

The defibrating unit 23 performs defibrating in a so-called dry method in the atmosphere (in the air) without using a solvent, water, or the like. Specifically, an impeller mill is used as the defibrating device unit 23. The defibrating device unit 23 has a function of generating an air current that sucks the raw material and discharges the defibrated material. Thereby, the defibrating apparatus unit 23 can suck the raw material together with the airflow from the introduction port 23a by the airflow generated by itself, defibrate, and transport the defibrated material to the discharge port 23b. The defibrated material that has passed through the defibrating device unit 23 is transferred to the sorting unit 30 via the pipe 31. In addition, as the airflow for transporting the defibrated material from the defibrating device unit 23 to the sorting unit 30, an airflow generated in the defibrating device unit 23 may be used, or an airflow generating device such as a blower is provided, Airflow may be used.

The sorting unit 30 introduces the defibrated material defibrated by the defibrating unit 20 through the pipe 31 into the sorting device unit 33 from the introduction port 32, and sorts the defibrated material according to the length of the fiber. As the sorting device unit 33, for example, a sieve is used. The sorting device section 33 has a net (filter, screen), fibers or particles smaller than the mesh size of the mesh (one that passes through the mesh, the first sort), and fibers larger than the mesh size of the mesh. And undefibrated pieces and lumps (those that do not pass through the net, second sort). For example, the first selection is transferred to the mixing unit 50 via the pipe 44. The second selected item is returned to the defibrating unit 20 from the discharge port 34 via the pipe 35. Specifically, the sorting device unit 33 is a cylindrical sieve that is rotationally driven by a motor. As the net of the sorting unit 33, for example, a metal net, an expanded metal obtained by extending a cut metal plate, or a punching metal in which a hole is formed in the metal plate by a press machine or the like is used.

1st web formation part 40 conveys the 1st sorting thing which passed sorting part 30 to mixing part 50. The first web forming unit 40 includes a mesh belt 41 as a conveying unit, a tension roller 42, and a suction unit (suction mechanism) 43. Further, the first web forming unit 40 is opposed to the first web forming unit 40 through the mesh belt 41, and a first ultraviolet irradiation device 46a that irradiates ultraviolet rays UV as a sterilizing line between a suction unit 43 and a rotating body 45 described later. And the 2nd ultraviolet irradiation device 46b is arrange | positioned as a light irradiation part.

The suction unit 43 can suck the first sorted material dispersed in the air through the opening (opening of the mesh) of the sorting unit 30 onto the mesh belt 41. The first sorted matter is sucked from the sorting unit 30 by the suction unit 43 and is deposited on the mesh belt 41 moving in the direction indicated by the arrow T to form the web V. The basic configuration of the mesh belt 41, the stretching roller 42, and the suction unit 43 is the same as the mesh belt 71, the stretching roller 72, and the suction unit (suction mechanism) 73 of the second web forming unit 70 described later. .

The web V passes through the sorting unit 30 and the first web forming unit 40, is formed in a soft and swelled state with a lot of air, and is transferred in the T direction. The web V is irradiated with ultraviolet rays in the ultraviolet irradiation region of the

ultraviolet irradiation devices

46a and 46b.

As described above, the mesh belt 41 is capable of depositing the first selection, and can pass the ultraviolet UV irradiated from the second ultraviolet irradiation device 46b that irradiates the ultraviolet UV through the mesh belt 41. It has roughness. Accordingly, the web V on the mesh belt 41 is irradiated with ultraviolet UV from the upper side illustrated in the drawing from the first ultraviolet irradiation device 46a, and the ultraviolet UV is irradiated from below on the mesh belt 41 from the second ultraviolet irradiation device 46b. Irradiated.

As is well known, ultraviolet rays UV are rays that have a bactericidal effect on various bacteria as germicidal lines, and most of the bacteria remaining on the web V are killed by passing the web V through the ultraviolet rays UV. Can be sterilized. As described above, since the web V is formed by softly depositing the fibrous first selection, the ultraviolet UV can reach the inside of the web V, not only the surface of the web V, It can be sterilized up to the inside.

The used paper Pu supplied from the raw material supply unit 200 is used and discharged in various usage environments, and it is extremely difficult to obtain used paper Pu sorted according to the level of bacterial contamination. It's okay. Therefore, even if the used paper Pu as a raw material is obtained from a wide range of suppliers, it is applied to the web V by the

ultraviolet irradiation devices

46a and 46b provided in the first web forming unit 40 provided in the manufacturing unit 1010 of the sheet manufacturing apparatus 1000 according to the present embodiment. On the other hand, the recycled paper Pr obtained by the sheet manufacturing apparatus 1000 can be obtained in a sterilized state by irradiating ultraviolet rays UV which are sterilization lines. That is, it is possible to obtain used paper Pu that is a raw material that is not limited to a supplier.

Further, the raw material Pu is not limited to the waste paper Pu, and can be input into the sheet manufacturing apparatus 1000. For example, even if the raw material Pu includes fibers such as pulp sheets, the first after being defibrated by the defibrating unit 20 The web forming unit 40 can be sterilized by ultraviolet UV irradiation from the

ultraviolet irradiation devices

46a and 46b.

The web V irradiated with the ultraviolet rays UV is transferred on the mesh belt 41, put into the tube 44, and passes through the rotating body 45 provided in the tube 44. The rotating body 45 can cut the web V before the web V is conveyed to the mixing unit 50. In the illustrated example, the rotator 45 includes a base 45a and a protrusion 45b protruding from the base 45a. The protrusion 45b has, for example, a plate shape. In the illustrated example, four protrusions 45b are provided, and the four protrusions 45b are provided at equal intervals. When the base 45a rotates in the direction R, the protrusion 45b can rotate around the base 45a. By cutting the web V by the rotating body 45, for example, it is possible to reduce fluctuations in the amount of defibrated material per unit time supplied to the deposition unit 60 described later.

As described above, the first web forming unit 40 includes the

ultraviolet irradiation devices

46a and 46b that irradiate the web V with ultraviolet UV as a sterilization line. Is replaced with the sterilization unit 40 for explanation.

The mixing unit 50 mixes the first selected product that has passed through the screening unit 30 and is transported by the sterilization unit 40 with the binder resin powder. The mixing unit 50 includes a powder supply device 51 that supplies the binder resin powder, a pipe 52 that conveys the first selected material and the binder resin powder, and a blower 53. The tube 52 is continuous with the tube 44. In the mixing unit 50, an air stream is generated by the blower 53 and can be conveyed while mixing the first selected material and the binder resin powder supplied from the powder supply device 51 in the pipe 52. . The binder resin powder supplied from the powder supply device 51 includes a resin capable of binding a plurality of fibers. At the time when the resin is supplied, the plurality of fibers are not bound. The resin binds the plurality of fibers by melting when passing through a sheet forming portion 80 described later. Note that the mechanism for mixing the first selected product and the binder resin powder is not particularly limited.

The binder resin powder supplied from the powder supply device 51 is a thermoplastic resin or a thermosetting resin. For example, AS resin, ABS resin, polypropylene, polyethylene, polyvinyl chloride, polystyrene, acrylic resin, polyester resin. Polyethylene terephthalate, polyphenylene ether, polybutylene terephthalate, nylon, polyamide, polycarbonate, polyacetal, polyphenylene sulfide, polyether ether ketone, and the like. These resins may be used alone or as a mixture as appropriate.

The binder resin powder supplied from the powder supply device 51 includes, in addition to the resin that binds the fibers, a colorant for coloring the fibers and the fiber according to the type of the sheet to be manufactured. An aggregation inhibitor for preventing aggregation, a flame retardant for making fibers difficult to burn, and the like may be included. The mixture of the first selected product and the binder resin powder that has passed through the mixing unit 50 is transferred to the deposition unit 60 via the tube 54.

The deposition unit 60 introduces the mixture that has passed through the mixing unit 50 into the deposition device unit 62 from the introduction port 61, loosens the entangled fibers of the defibrated material, and lowers the fibers while dispersing them in the air. Furthermore, when the resin of the binder resin powder supplied from the powder supply device 51 is in a fibrous form, the deposition device unit 62 loosens the entangled resin fibers. Thereby, the deposition unit 60 can deposit the mixture on the second web forming unit 70 with good uniformity.

As the deposition unit 62, a cylindrical sieve having a rotating net is used, and fibers or particles contained in the mixture that has passed through the mixing unit 50 are smaller than the opening size of the mesh of the sieve, that is, fibers that can pass through the net. Or let the particles pass. The configuration of the deposition unit 60 is, for example, the same as the configuration of the sorting unit 30. It should be noted that the “sieving” of the deposition device unit 62 may not have a function of selecting a specific object. In other words, the “sieving” used as the deposition apparatus unit 62 means that a net is provided, and all of the mixture introduced into the deposition apparatus unit 62 may be allowed to pass through.

The second web forming unit 70 deposits the passing material that has passed through the deposition unit 60 to form the web W as a deposit. The second web forming unit 70 includes, for example, a mesh belt 71, a tension roller 72, and a suction unit (suction mechanism) 73. While moving, the mesh belt 71 accumulates the passing material that has passed through the opening (mesh opening) of the accumulation unit 60. The mesh belt 71 is stretched by a stretching roller 72, and is configured to allow air to pass therethrough. The mesh belt 71 moves continuously as the stretching roller 72 rotates. The passing material that has passed through the accumulation unit 60 descends on the mesh belt 71 that moves continuously, whereby the web W is formed on the mesh belt 71.

The suction part 73 is provided below the mesh belt 71 (on the opposite side to the accumulation part 60 side). The suction unit 73 can generate an airflow directed downward (airflow directed from the accumulation unit 60 to the mesh belt 71). Thereby, the discharge speed | rate of the passing material from the deposition part 60 can be enlarged.

As described above, by passing through the deposition part 60 and the second web formation part 70 (web formation process), the web W in a soft and swelled state containing a large amount of air is formed. The web W deposited on the mesh belt 71 is conveyed to the sheet forming unit 80. In the illustrated example, a humidity control unit 74 that adjusts the humidity of the web W is provided. The humidity control unit 74 can add water or water vapor to the web W to adjust the quantity ratio of the web W to water.

The sheet forming unit 80 pressurizes and heats the web W deposited on the mesh belt 71 to form the sheet S. In the sheet forming unit 80, by applying heat to the mixture of the defibrated material and the binder resin powder mixed in the web W, a plurality of fibers in the mixture are bound to each other via the binder resin powder. Can be worn.

The sheet forming unit 80 includes a pressurizing unit 81 that pressurizes the web W and a heating unit 82 that heats the web W pressed by the pressurizing unit 81. The pressurizing unit 81 includes a pair of

calendar rollers

81a and 81b, and applies pressure to the web W deposition direction, that is, the thickness direction. The web W is pressed to reduce its thickness, and the density of the web W is increased. The heating unit 82 includes a pair of heating rollers 82a and 82b. The sheet S is formed by heating the web W pressed by the

calendar rollers

81a and 81b by the heating rollers 82a and 82b, melting the resin, and binding the fibers. Here, the pressure applied to the web W by the

calendar rollers

81 a and 81 b of the pressurizing unit 81 can be higher than the pressure applied to the web W by the heating rollers 82 a and 82 b of the heating unit 82. The number of

calendar rollers

81a and 81b and heating rollers 82a and 82b is not particularly limited.

The sheet forming unit 80 is provided with a heating unit 82, and is heated to a temperature at which the resin is melted at the same time as the sheet is formed on the sheet S by the heating rollers 82a and 82b for melting the resin and binding the fibers. Thus, a certain degree of heat sterilization effect can be obtained. Therefore, when used as a material, used paper having a relatively hygienic state such as paper used in an office environment, the heat sterilization effect by the heating rollers 82a and 82b is effective.

However, if the temperature is extremely high in the final manufacturing process of the sheet, the sheet may be damaged and the strength of the sheet may be impaired. In the present embodiment, since the web V made of the raw material fibers defibrated is sterilized, it is not necessary to rely on heat sterilization by the heating rollers 82a and 82b. Therefore, since it is not necessary to raise the heating temperature excessively, the strength deterioration of the sheet can be suppressed.

The cutting unit 90 cuts the sheet S formed by the sheet forming unit 80. In the example shown in the figure, the cutting unit 90 cuts the sheet S in a direction parallel to the first cutting unit 91 that cuts the sheet S in a direction that intersects the conveyance direction of the sheet S, for example, a roller cutter or the like. A second cutting portion 92. The second cutting unit 92 cuts the sheet S that has passed through the first cutting unit 91, for example. By passing through the cutting unit 90, a single-size recycled paper Pr cut from the sheet S is formed. The cut single-sheet recycled paper Pr is discharged to the recycled paper discharge unit 300 and conveyed to a recycled paper storage unit (not shown). Note that the method of paper regeneration is not limited to the above-described method, and may be a method of physically removing a recording medium called toner attached to the surface of the recording medium, for example.

(Second Embodiment)
FIG. 2 is a configuration diagram illustrating a schematic configuration of the sterilization unit 1140 provided in the sheet manufacturing apparatus 1100 according to the second embodiment. The sheet manufacturing apparatus 1100 according to the second embodiment is a form in which the manufacturing unit 1010 including the sterilizing unit 40 in the sheet manufacturing apparatus 1000 according to the first embodiment is replaced with 1110 including the sterilizing unit 1140. Therefore, in other configurations, the same components as those in the sheet manufacturing apparatus 1000 according to the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

The sterilization unit 1140 included in the sheet manufacturing apparatus 1100 according to the present embodiment includes the suction unit 43 that deposits the first selection on the mesh belt 41 and the rotating body 45 included in the tube 44 in the direction of gravity of the mesh belt 41. A liquid discharge part 1141 as a sterilizing means is provided above (in the figure).

A drying device 1142 including a casing 1142b that covers the mesh belt 41 is disposed on the web V conveyance direction T side of the liquid ejection unit 1141, that is, between the liquid ejection unit 1141 and the rotating body 45.

The liquid discharge unit 1141 includes a discharge drive unit 1141a including a storage unit that introduces and stores a chemical solution to be sprayed from a chemical solution supply unit (not shown), and a pressurizing unit that applies pressure that can be discharged in a mist form to the chemical solution. A chemical spray unit 1141b for discharging the liquid in a mist form. And the mist chemical | medical solution Ms is sprayed from the chemical | medical solution spraying part 1141b toward the web V conveyed on the mesh belt 41. FIG. The sprayed chemical liquid is a sterilizing chemical liquid, and the web V sprayed with the atomized chemical liquid Ms is sterilized. As the bactericidal chemical solution, a known chemical solution is used. For example, alcohols, hydrogen peroxide solution, chlorhexidine gluconate, sodium hypochlorite, ozone water, etc. may be appropriately selected.

The web V sprayed with the atomized chemical liquid Ms is conveyed by the mesh belt 41 and passes through the housing 1142b of the drying device 1142. The housing 1142b is provided with a gas delivery unit 1142a that delivers dry gas into the housing 1142b, and the dry gas is sent into the housing 1142b. As the dry gas, for example, low-humidity air or heated air can be used.

Excess liquid components are vaporized by the dry gas in the web V passing through the housing 1142b, and discharged from the exhaust port 1142c provided in the housing 1142b to the outside of the manufacturing unit 1110 by an exhaust device (not shown).

In the sterilizing unit 1140 according to the present embodiment, since the sterilizing chemical liquid is sprayed on the web V by the liquid discharge unit 1141, the sterilizing chemical liquid is prevented from being conveyed to the rotating body 45 in a state of being attached in a liquid state. It is preferable that a drying device 1142 is provided. However, when the disinfectant liquid is a liquid having high volatility, the drying device 1142 may not be provided. However, it is preferable to provide a drying device 1142 as an exhaust device for discharging volatile components to the outside of the manufacturing unit 1110.

Since the sterilizing unit 1140 provided in the sheet manufacturing apparatus 1100 according to the present embodiment sprays the sterilizing agent solution toward the web V, the sterilizing agent solution can be infiltrated into the inside of the web V. Therefore, not only the surface of the web V but also the inside can be sterilized.

By providing the sterilizing unit 1140 for sterilizing the web V, the recycled paper Pr obtained by the sheet manufacturing apparatus 1100 can be obtained in a sterilized state. That is, even if the used paper Pu supplied from the raw material supply unit 200 is used and discharged in various usage environments, the sterilization process is performed in the state of the web V, so that the raw material Pu is not limited to the supplier. It is possible to obtain used paper Pu.

(Modification 1)
FIG. 3 shows a schematic configuration of Modification 1 of the sheet manufacturing apparatus 1100 according to the second embodiment described above. A sheet manufacturing apparatus 1100A of Modification 1 shown in FIG. 3 has a configuration in which a liquid discharge unit 1141 that constitutes a sterilization unit 1140 included in the sheet manufacturing apparatus 1100 shown in the second embodiment is arranged in the mixing unit 50. . Therefore, the same code | symbol is attached | subjected to the same component as the sheet manufacturing apparatus 1100 which concerns on 2nd Embodiment, and description is abbreviate | omitted.

In the sheet manufacturing apparatus 1100A shown in FIG. 3, the web V formed by the first web forming unit 140 and the binder resin powder supplied from the powder supply device 51 in the mixing unit 150 are mixed and formed. The mixed material is transferred by the blower 53 to the deposition section 60 through the pipe 154.

In the sheet manufacturing apparatus 1100A according to the first modified example, a liquid discharge unit 1500 that sprays a bactericide solution onto the mixture is disposed in a pipe 154 through which the mixture is transferred to the deposition unit 60. The liquid ejection unit 1500 includes an ejection drive unit 1500a and a chemical liquid spray unit 1500b. The liquid ejection unit 1500 includes an opening into the tube provided in the tube 154, and is held by a holding unit 154a that holds the liquid ejection unit 1500.

The mixture transported to the deposition unit 60 through the pipe 154 is sprayed with the mist chemical liquid Ms from the chemical spray unit 1500b of the liquid discharge unit 1500 held by the holding unit 154a before reaching the deposition unit 60. And sterilized in the form of a mixture. That is, in the sheet manufacturing apparatus 1100A according to the first modification, the sterilization unit is provided in the mixing unit 150, and sprayed with the sterilizing chemical liquid on the first selected material that is fibrous, so that the sheet is transferred to the sheet forming unit 80. Even if it is formed on the sheet, it can be sterilized up to the inside of the sheet.

(Modification 2)
FIG. 4 shows a schematic configuration of Modification 2 of the sheet manufacturing apparatus 1100 according to the second embodiment described above. The sheet manufacturing apparatus 1100B of Modification 2 shown in FIG. 4 is suitable for the web W formed through the second web forming unit 70 with respect to the sterilization unit 1140 provided in the sheet manufacturing apparatus 1100 shown in the second embodiment. In the humidity control unit 74 that applies humidity, a disinfectant is added. Therefore, the same code | symbol is attached | subjected to the same component as the sheet manufacturing apparatus 1100 which concerns on 2nd Embodiment, and description is abbreviate | omitted.

Also in the sheet manufacturing apparatus 1100B shown in FIG. 4, in the second web forming unit 70 in which the passing material that has passed through the deposition unit 60 is deposited and the web W is formed, a humidity control unit 171 that adjusts the humidity of the web W is provided. Water or water vapor is added to the web W to adjust the quantitative ratio between the web W and water. The sheet manufacturing apparatus 1100B according to the second modification includes a chemical solution supply unit 172 that supplies a sterilizing chemical solution to the humidity control unit 171. The chemical solution supply unit 172 includes a chemical solution supply device 172a that stores the sterilizing chemical solution and sends the stored sterilizing chemical solution to the delivery pipe 172b. Supply chemicals.

By supplying the bactericidal solution from the chemical supply unit 172 to the water or water vapor supplied from the humidity control unit 171 to the web W, water containing the bactericidal solution is added to the web W, and the web W is sterilized. Is done. That is, the sterilization unit 170 is configured. According to the sheet manufacturing apparatus 1100B according to the second modified example, the inside of the web W is added by adding moisture containing a bactericide solution to the web W in a state where the mixture is deposited, that is, in a state where the fibers are laminated. Bactericidal treatment can be performed by infiltrating the bactericidal solution.

(Third embodiment)
FIG. 5 is a configuration diagram illustrating a schematic configuration of the sterilization unit 1240 included in the sheet manufacturing apparatus 1200 according to the third embodiment. The sheet manufacturing apparatus 1200 according to the third embodiment is a form in which the manufacturing unit 1010 including the sterilizing unit 40 in the sheet manufacturing apparatus 1000 according to the first embodiment is replaced with a manufacturing unit 1210 including the sterilizing unit 1240. Therefore, in other configurations, the same components as those in the sheet manufacturing apparatus 1000 according to the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

The sterilization unit 1240 included in the sheet manufacturing apparatus 1200 according to the present embodiment includes the suction unit 43 that deposits the first selection on the mesh belt 41 and the rotating body 45 included in the tube 44 in the direction of gravity of the mesh belt 41. A water vapor injection device 1241 as a sterilizing means is disposed above (in the drawing).

The steam spraying device 1241 includes a steam generator 1241a and a steam spraying unit 1241b, and the steam spraying unit 1241b sprays high-temperature steam St toward the web V conveyed on the mesh belt 41. Further, a drying device 1242 including a casing 1242b that covers the mesh belt 41 is disposed on the web V conveyance direction T side of the water vapor injection device 1241, that is, between the water vapor injection device 1241 and the rotating body 45.

The web V conveyed on the mesh belt 41 passes through the injection region of the high-temperature water vapor St injected from the water-vapor injection unit 1241b of the water vapor injection device 1241, so that the high-temperature water vapor St is sprayed on the web V, and the high-temperature water vapor St. Part of the web passes through the web V and passes through the mesh of the mesh belt 41. Thereby, it is sterilized by the high temperature steam St to the inside with the surface of the web V. The temperature of the high-temperature steam St exceeds 100 ° C., which corresponds to so-called boiling sterilization, and is below the temperature at which carbonization due to thermal decomposition of the web V formed from the waste paper Pu made of wood-derived pulp as a raw material is not reached. It is preferable that it is the temperature of. Moreover, it is preferable to add a pressure that allows the web V to pass through the high-temperature steam St.

The web V sprayed with high-temperature steam St is conveyed by the mesh belt 41 toward the rotating body 45. A drying device 1242 is provided in the middle of the conveyance path of the mesh belt 41 to send out a drying gas for drying the web V on which the water vapor has been jetted. The web V sprayed with the high-temperature steam St by the steam spraying device 1241 is in a state containing the moisture imparted by the steam, but is heated to a high temperature up to the temperature of the high-temperature steam St. When separated from the region, the added water is evaporated and dried by the amount of heat added to the web by the high-temperature steam St. However, it is preferable to provide a drying device 1242 in order to reliably remove the water contained in the web V.

The web V on which the steam St has been sprayed is conveyed by the mesh belt 41 and passes through the housing 1242b of the drying device 1242. The housing 1242b is provided with a gas delivery unit 1242a that delivers dry gas into the housing 1242b, and the dry gas is sent into the housing 1242b. As the dry gas, for example, low-humidity air or heated air can be used. Excess moisture is evaporated by the dry gas from the web V that passes through the housing 1242b, and is discharged as exhaust vapor from an exhaust port 1242c provided in the housing 1242b to the outside of the manufacturing unit 1210 by an exhaust device (not shown).

By providing the sterilizing unit 1240 for sterilizing the web V, the recycled paper Pr obtained by the sheet manufacturing apparatus 1200 can be obtained in a sterilized state. That is, even if the used paper Pu supplied from the raw material supply unit 200 is used and discharged in various usage environments, the sterilization process is performed in the state of the web V, so that the raw material Pu is not limited to the supplier. It is possible to obtain used paper Pu.

(Fourth embodiment)
FIG. 6 is a configuration diagram illustrating a schematic configuration of the sterilization unit 1340 included in the sheet manufacturing apparatus 1300 according to the fourth embodiment. The sheet manufacturing apparatus 1300 according to the fourth embodiment is a form in which the manufacturing unit 1010 including the sterilizing unit 40 in the sheet manufacturing apparatus 1000 according to the first embodiment is replaced with a manufacturing unit 1310 including the sterilizing unit 1340. Therefore, in other configurations, the same components as those in the sheet manufacturing apparatus 1000 according to the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

The sterilization unit 1340 included in the sheet manufacturing apparatus 1300 according to the present embodiment is a gravity direction of the mesh belt 41 between the suction unit 43 that deposits the first selection on the mesh belt 41 and the rotating body 45 included in the tube 44. Above (illustrated above), a humidifying unit 1341 including a water discharge unit 1341b that discharges water droplets toward the web V, a microwave irradiation unit 1342 on the web V conveyance direction T side of the humidifying unit 1341, and a microwave A drying device 1343 is provided on the transport direction T side of the irradiation unit 1342.

The humidifying unit 1341 includes a discharge unit 1341a including a storage unit that introduces and stores water to be discharged from a water supply unit (not shown), and a pressurizing unit that applies a dischargeable pressure to the water, and water that discharges water droplets. A discharge unit 1341b. In addition, although the form which discharges droplet-shaped water is illustrated in this example, the water discharge part 1341b which can spray water in a mist form may be sufficient.

The web V humidified by the humidifying unit 1341 is returned to the microwave irradiation unit 1342 by the mesh belt 41. The microwave irradiation unit 1342 includes a microwave generation unit 1342a disposed inside a housing 1342b that shields the leakage of the microwave Mw to the outside, and is directed toward the web V conveyed into the housing 1342b. Mw is arranged to be able to irradiate. Then, the humidified web V is conveyed into the housing 1342b of the microwave irradiation unit 1342, and the microwave Mw is irradiated toward the web V from the microwave generation unit 1342a. Then, the water molecules contained in the web V are microwave-heated by the microwave Mw, and the bacteria remaining on the web V are sterilized by raising the temperature of the web V.

The web V heated by the microwave irradiation unit 1342 is conveyed to the drying device 1343 by the mesh belt 41. The web V is discharged and humidified by the water droplets Wd from the humidifying unit 1341, and enters a state containing moisture. However, the microwave V is heated to a high temperature by the microwave irradiation unit 1342, and the water contained in the web V evaporates. Will dry. However, it is preferable to provide a drying device 1343 in order to reliably remove the water contained in the web V.

The web V transported and passed through the microwave irradiation unit 1342 is transported by the mesh belt 41 and passes through the housing 1343b of the drying device 1343. The housing 1343b includes a gas delivery unit 1343a that delivers dry gas into the housing 1343b, and the dry gas is sent into the housing 1343b. As the dry gas, for example, low-humidity air or heated air can be used. Excess moisture is evaporated by the dry gas from the web V passing through the housing 1343b, and is discharged as exhaust vapor from an exhaust port 1343c provided in the housing 1343b to the outside of the manufacturing unit 1310 by an exhaust device (not shown).

By providing the sterilizing unit 1340 for sterilizing the web V, the recycled paper Pr obtained by the sheet manufacturing apparatus 1300 can be obtained in a sterilized state. That is, even if the used paper Pu supplied from the raw material supply unit 200 is used and discharged in various usage environments, the sterilization process is performed in the state of the web V, so that the raw material Pu is not limited to the supplier. It is possible to obtain used paper Pu.

The sheet manufactured by any one of the

sheet manufacturing apparatuses

1000, 1100, 1200, and 1300 according to the present embodiment becomes a material for various sheet processed products using a sheet processing machine that processes the sheet. Conventionally, disposable tableware such as paper cups, paper plates, and paper lunch boxes have been manufactured using virgin pulp due to hygiene problems. However, since the recycled paper manufactured in the present embodiment is a sanitary sheet, it can be processed into paper tableware that could not be manufactured with recycled paper conventionally. In addition, although embodiment mentioned above was demonstrated regarding the dry-type recycled sheet manufacturing apparatus, this invention is not limited to a dry-type apparatus, It is applicable also to a wet-type recycled sheet manufacturing apparatus.

(Fifth embodiment)
FIG. 7: is a block diagram which shows schematic structure of the pulp origin product manufacturing apparatus which concerns on 5th Embodiment. Here, the pulp-derived product refers to a product manufactured using cellulose fiber pulp produced from plants such as wood as one of the raw materials. The recycled paper Pr manufactured by the

sheet manufacturing apparatuses

1000, 1100, 1200, and 1300 described in the above embodiment is also one of the pulp-derived products. However, in the pulp-derived product manufacturing apparatus according to the present embodiment, the final product An apparatus capable of producing and obtaining pulp as one of raw materials from waste paper Pu will be described.

A pulp-derived product manufacturing apparatus 2000 (hereinafter referred to as a pulp manufacturing apparatus 2000) according to the fifth embodiment shown in FIG. 7 includes some of the components included in the manufacturing unit 1010 included in the sheet manufacturing apparatus 1000 according to the first embodiment. A pulp manufacturing unit 2100 is provided. Therefore, the same components as those in the sheet manufacturing apparatus 1000 according to the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

As described above, the pulp manufacturing apparatus 2000 includes the raw material supply unit 200 and the pulp manufacturing unit 2100, and the pulp Fp manufactured in the pulp manufacturing unit 2100 is stored in a storage bag 2300 disposed in the storage container 2200. Is done. In other words, the pulp manufacturing apparatus 2000 is an apparatus that uses pulp Fp as a manufactured product.

The pulp manufacturing apparatus 2000 is supplied with waste paper Pu from the raw material supply unit 200. The supplied used paper Pu is fed into the crushing unit 10 provided in the pulp manufacturing unit 2100, and is cut into pieces in the crushing unit 10 and fed into the defibrating unit 20. In the defibrating unit 20, the raw material fragmented in the defibrating device unit 23 is defibrated and formed into a defibrated material.

The defibrated material is subsequently transferred to the sorting unit 30, and the defibrated material is sorted using a sorting means such as a sieve according to the length of the fiber, and the first sorted product that has passed through the sorting unit 30 is the first web forming unit. Is conveyed to the mixing unit 50 as a web V through the sterilizing unit 40.

In the process of being conveyed by the mesh belt 41, the sterilizing unit 40 irradiates the web V formed with a lot of air and in a softly swelled state with ultraviolet rays UV by the

ultraviolet irradiation devices

46a and 46b. As is well known, ultraviolet rays UV are rays that have a bactericidal effect on various bacteria as germicidal lines, and most of the bacteria remaining on the web V are killed by passing the web V through the ultraviolet rays UV. Can be sterilized. As described above, since the web V is formed by softly depositing the fibrous first selection, the ultraviolet UV can reach the inside of the web V, not only the surface of the web V, It can be sterilized up to the inside.

The web V sterilized by the sterilization unit 40 is conveyed to the rotating body 45 by the mesh belt 41 and is conveyed to the mixing unit 50 through the rotating body 45. In the mixing unit 50, since the manufactured product of the pulp manufacturing apparatus 2000 according to the present embodiment is the pulp Fp, the binder resin powder mixed in the sheet manufacturing apparatus 1000 according to the first embodiment is not used, and the binding unit 50 is bonded. An additive material corresponding to the intended use of the final product to be obtained by further processing the pulp Fp instead of the resin powder is mixed. Examples of the additive material include water-absorbing polymer fine particles, fragrance, antibacterial agent and antistatic agent. Therefore, the additive material to be mixed is supplied from the powder supply device 51.

The mixture of the first selection product and the additive material generated in the mixing unit 50 is transferred to the dispersion unit 2110. The dispersion unit 2110 includes the same mechanism as the deposition unit 60 included in the manufacturing unit 1010 of the sheet manufacturing apparatus 1000 according to the first embodiment.

The dispersion unit 2110 introduces the mixture that has passed through the mixing unit 50 into the dispersion device unit 2112 from the introduction port 2111, loosens the entangled fibers of the defibrated material that is the first selected material, and more uniformly disperses the additive material in the fiber. It is lowered in the dispersing unit 2112 while being dispersed. As the dispersion unit 2112, a cylindrical sieve having a rotating mesh is used, and fibers or particles contained in the mixture that has passed through the mixing unit 50 are smaller than the opening size of the mesh of the sieve, that is, fibers that can pass through the mesh. Or let the particles pass. The configuration of the distribution unit 2110 is the same as the configuration of the selection unit 30, for example.

The pulp Fp as a mixture of the fiber and the additive material uniformly mixed by the dispersion unit 2112 is introduced from the discharge unit 2113 into the storage bag 2300 installed in the storage container 2200. In order to facilitate introduction of the pulp Fp into the storage bag 2300, a suction device 2400 that depressurizes the storage bag 2300 may be provided.

* The manufactured pulp Fp is supplied as one of the raw materials of the product. As described above, the pulp Fp formed by the pulp manufacturing apparatus 2000 according to the present embodiment is defibrated from the used paper Pu, which is a raw material, by the defibrating unit 20, and the mesh belt of the sterilizing unit 40 that is the first web forming unit. Since the web V deposited on 41 is sterilized before being conveyed to the mixing unit 50 by the ultraviolet rays UV of the sterilization line irradiated from the

ultraviolet irradiation devices

46a and 46b provided in the sterilization unit 40, It can be used for various products that require hygiene management.

Since the disperser unit 2112 has a rotary mesh drum structure, the inputted defibrated material is loosened to a state suitable for the final product by appropriately setting the mesh conditions and rotation conditions of the drum. . If the pulp Fp is formed into a uniform density cotton-like body, the cotton-like body can be processed into a water-absorbing pad such as a paper diaper, a napkin, or a paper towel by laminating the cotton-like body into a sheet having a predetermined thickness. Moreover, it can process into a tampon by loading this cotton-like body into the cylinder bag which consists of a water absorbing material. The pulp Fp manufactured in this embodiment can be processed into various sanitary and sanitary products using various conventional processing machines made of cotton-like materials as they are.

Furthermore, by forming the pulp Fp with a mold having a predetermined shape, an ink absorber that absorbs excess ink of the ink jet printer can be manufactured. Also, cotton-like materials such as sound-absorbing materials affixed inside speaker boxes, sound-absorbing materials that suppress the noise of various industrial products, heat-insulating materials that suppress heat transfer, and cushioning materials used when transporting crackers are used as materials. Applicable to various products. In addition, paper tableware such as a paper cup is generally manufactured by processing a sheet, but a pulp Fp that is a cotton-like body can be formed by an airlaid processing machine. This method is disclosed in Japanese Patent Application Laid-Open No. 2001-232611. That is, the pulp-derived product manufacturing apparatus of this embodiment can be applied to various products.

Moreover, even if the used paper Pu as a raw material is obtained from a wide range of suppliers, the used paper Pu to be input to the pulp manufacturing unit 2100 of the pulp manufacturing apparatus 2000 according to the present embodiment is defibrated after being defibrated. Since it will be thrown into the mixing part 50 and the dispersion | distribution part 2110 in the sterilized state, the used paper Pu used as the raw material which is not limited to a procurement source can be obtained. In addition, it is not limited to used paper Pu as a raw material, For example, it may contain fibers, such as a pulp sheet, and if a raw material is sterilized by the sterilization part 40 provided with the sterilization means applicable to the selected raw material. Good.

Although the pulp manufacturing apparatus 2000 described above is configured to include the sterilization unit 40 that performs sterilization processing using ultraviolet UV, it is based on the spraying of the mist chemical liquid Ms from the liquid discharge unit 1141 included in the sheet manufacturing apparatus 1100 according to the second embodiment. The sterilization unit 1140 that performs sterilization processing, or the sterilization unit 1240 that performs sterilization processing by jetting high-temperature steam St included in the sheet manufacturing apparatus 1200 according to the third embodiment, or the microwave included in the sheet manufacturing apparatus 1300 according to the fourth embodiment. Any of the sterilization units 1340 that perform sterilization processing by irradiation of the microwave Mw from the irradiation unit 1342 may be provided.

(Sixth embodiment)
As the sixth embodiment, a sheet manufacturing method by the sheet manufacturing apparatus 1000 according to the first embodiment will be described. FIG. 8 is a flowchart showing a sheet manufacturing method according to the sixth embodiment. Each step will be described with reference to FIG.

(Raw material supply process)
In the raw material supply step (S1), recycled waste paper Pu prepared in advance is set in the raw material supply unit 200, and the raw material supply unit 200 is mounted via a raw material supply unit mounting unit (not shown) of the sheet manufacturing apparatus 1000. Then, the used paper Pu set in the raw material supply unit 200 is conveyed toward the crushing unit 10 by a sheet feeding means provided in a raw material supply unit mounting unit (not shown).

(Defibration process)
In the defibrating step (S2), first, the used paper Pu conveyed and charged in the raw material supply step (S1) is formed into a few cm square strips by the crushing blade 11 provided in the crushing unit 10. Then, the defibrating step (S2) is performed by the defibrating device unit 23 provided in the defibrating unit 20 to unravel the used waste paper Pu into individual fibers. In the defibrating step (S2) according to the present embodiment, in the defibrating apparatus unit 23, so-called dry defibrating is performed in which defibrating is performed in the atmosphere (in the air) without using a solvent, water, or the like. .

(Sterilization process)
In the sterilization step (S3), the fibers of the first selected product obtained by being sorted by the sorting device unit 33 during the defibrating step (S2) on the mesh belt 41 provided in the sterilization unit 40 that is the first web forming unit. The web V is deposited by suction of the suction part 43. The sterilization step (S3) includes a conveyance step of conveying the formed web V by the mesh belt 41. The conveyance process includes a sterilization line irradiation process in which ultraviolet rays UV of a sterilization line, which is a sterilization means, is irradiated toward the web V from the

ultraviolet irradiation devices

46a and 46b.

(Deposition process)
The defibrated material obtained in the defibrating step (S2) is formed on the web V, sterilized in the sterilizing step (S3), and then conveyed to the mixing unit 50 by the mesh belt 41, and the deposition step (S4) is executed. Is done. The deposition step (S4) includes a step of mixing the defibrated material with a binder resin powder to be formed from the fibrous defibrated material to the sheet-like recycled paper Pr in a pressurizing step described later. The binder resin powder is a thermoplastic resin or a thermosetting resin. For example, AS resin, ABS resin, polypropylene, polyethylene, polyvinyl chloride, polystyrene, acrylic resin, polyester resin, polyethylene terephthalate, polyphenylene ether, polybutylene. Terephthalate, nylon, polyamide, polycarbonate, polyacetal, polyphenylene sulfide, polyether ether ketone, and the like. These resins may be used alone or as a mixture as appropriate. In addition to the resin that binds the fiber, the binder resin powder includes a colorant for coloring the fiber and an aggregation inhibitor for preventing the fiber from agglomerating according to the type of sheet produced. In addition, a flame retardant for making the fiber or the like difficult to burn may be included.

The mixture in which the defibrated material and the binder resin powder are mixed is transported to the deposition unit 60, transported and deposited from the deposition unit 60 to the second web forming unit 70, and is a soft and bulging web containing a lot of air. W is formed on the mesh belt 71. And the web W is conveyed to a pressurization process.

(Pressure process)
In the pressurizing step (S5), the web W is compressed in the stacking direction of the web W, that is, in the thickness direction by the pressurizing unit 81 provided in the sheet forming unit 80, and the web W compressed by the pressurizing unit 81 is compressed. The sheet S is formed by passing through the heating unit 82 to be heated. That is, the web W in which the defibrated material and the binder resin powder are mixed in the deposition step (S4) is fused by the heating unit 82, and the defibrated fibers are bound. By doing so, the web W can be formed on the sheet S. At this time, the heating unit 82 reaches a high temperature at which the resin can be melted, whereby the sheet S is sterilized to some extent.

The sheet manufacturing method according to the present embodiment is completed when the sheet S is obtained by the pressing step (S5). However, after the pressing step (S5), the recycled paper Pr is formed into a desired size. A step of cutting the sheet S may be provided.

The used paper Pu supplied in the raw material supply step (S1) is used and discharged in various usage environments, and it is extremely difficult to obtain used paper Pu sorted according to the level of bacterial contamination. It's okay. Therefore, according to the sheet manufacturing method according to the above-described embodiment, even if the used paper Pu is obtained from a wide range of suppliers, by providing the sterilization process (S3) after the defibrating process (S2), Is formed into a fibrous defibrated material, and then the deposition step (S4) and the pressurizing step (S5) are performed as a sterilized defibrated material, and a sterilized recycled paper Pr can be obtained. . That is, it is possible to obtain used paper Pu that is a raw material that is not limited to a supplier.

The sterilization process (S3) which shows the sheet manufacturing method concerning this embodiment illustrated using the sterilization part 40 which can perform sterilization processing by irradiation of ultraviolet rays UV with which the sheet manufacturing apparatus 1000 concerning a 1st embodiment was equipped in the above-mentioned example. Is a sterilization step (S3) including a sterilization unit liquid solution discharge step by a sterilization unit 1140 that performs sterilization processing by spraying the atomized chemical liquid Ms from the liquid discharge unit 1141 provided in the sheet manufacturing apparatus 1100 according to the second embodiment. Also good. Or the sterilization process (S3) including the water vapor | steam injection process by the sterilization part 1240 which performs the sterilization process by the injection of the high temperature water vapor | steam St with which the sheet manufacturing apparatus 1200 which concerns on 3rd Embodiment is equipped may be sufficient. Alternatively, a sterilization process including a humidification process by a sterilization unit 1340 for performing a sterilization process by irradiation of the microwave Mw from the microwave irradiation unit 1342 included in the sheet manufacturing apparatus 1300 according to the fourth embodiment, and a microwave irradiation process ( S3) may be used.

(Seventh embodiment)
As the seventh embodiment, a pulp-derived product manufacturing method by the pulp-derived product manufacturing apparatus 2000 according to the fifth embodiment will be described. FIG. 9 is a flowchart showing a pulp-derived product manufacturing method according to the seventh embodiment. Each step will be described with reference to FIG. As described above, the pulp-derived product refers to a product manufactured using cellulose fiber pulp produced from plants such as wood as one of the raw materials. Recycled paper Pr produced by the sheet production method described in the above embodiment is also one of the pulp-derived products, but in the pulp-derived product production method according to the present embodiment, pulp as one of the raw materials of the final product A method for generating and obtaining the paper from the used paper Pu will be described.

In the pulp-derived product manufacturing method according to the present embodiment, the steps from the raw material supply step (S1) to the sterilization step (S3) shown in the flowchart of FIG. 8 in the sheet manufacturing method according to the sixth embodiment are common steps. The post-process including the mixing step (S10) is different. Therefore, the description from the raw material supply process (S1) to the sterilization process (S3) in the flowchart of the pulp-derived product manufacturing method according to the present embodiment shown in FIG. 9 is omitted, and the subsequent process including the mixing process (S10) will be described. .

(Mixing process)
The sterilized defibrated material obtained up to the sterilization step (S3) is conveyed to the mixing unit 50, and the mixing step (S10) is executed. In the mixing step (S10), since the manufactured product of the pulp manufacturing apparatus 2000 used in the pulp-derived product manufacturing method according to the present embodiment is pulp Fp, the deposition step (S4) of the sheet manufacturing method according to the sixth embodiment. In this case, the binder resin powder that has been mixed in the process is not used, but an additive material is mixed according to the intended use of the final product obtained by further processing the pulp Fp instead of the binder resin powder. Examples of the additive material include water-absorbing polymer fine particles, fragrance, antibacterial agent and antistatic agent.

In the mixing step (S10), the first selected material conveyed in the mixing unit 50 shown in FIG. 7 and the additive material supplied from the powder supply device 51 are mixed and transferred to the dispersing unit 2110. The dispersion unit 2110 loosens the entangled fibers of the defibrated material that is the first selection, and lowers the mixed additive material in the dispersion device unit 2112 while more uniformly dispersing the fibers in the fiber. As the dispersion unit 2112, a cylindrical sieve having a rotating mesh is used, and fibers or particles contained in the mixture that has passed through the mixing unit 50 are smaller than the opening size of the mesh of the sieve, that is, fibers that can pass through the mesh. Alternatively, the uniform pulp Fp can be formed by passing the particles.

(Discharge process)
In the mixing step (S10), a discharging step (S11) is performed in which the pulp Fp lowered in the dispersing unit 2112 is discharged from the dispersing unit 2110 to a container that can be carried out. In the discharging step (S11), the storage bag 2300 installed in the storage container 2200 disposed in the discharge unit 2113 provided in the dispersion unit 2110 is decompressed by the suction device 2400, and the pulp Fp is sucked from the dispersion device unit 2112 to store the storage bag. It is stored in 2300.

The obtained pulp Fp is supplied as one of the raw materials of the product. Pulp Fp obtained by the pulp-derived product manufacturing method according to the present embodiment is a product that requires sanitary management because waste paper Pu as a raw material is subjected to a sterilization step (S2) by the sterilization unit 40 in the pulp manufacturing unit 2100. It can be suitably used for sanitary products such as disposable diapers and water absorbent pads, sanitary products and the like. Moreover, even if the used paper Pu as a raw material is obtained from a wide range of suppliers, according to the pulp-derived product manufacturing method according to this embodiment, after forming into a fibrous defibrated material by the defibrating step (S2), By passing through the sterilization step (S3), it becomes possible to form a sterilized defibrated material on the recycled paper Pr, and it is possible to obtain used paper Pu that is not limited to the procurement source.

The pasteurization process (S3) which shows the pulp origin product manufacturing method which concerns on this embodiment uses the pasteurization part 40 which can perform the pasteurization process by irradiation of the ultraviolet-ray UV with which the pulp origin product manufacturing apparatus 2000 which concerns on 5th Embodiment is equipped in the above-mentioned example. However, the sterilizing agent by the pulp-derived product manufacturing apparatus provided with the sterilizing unit 1140 that performs the sterilizing process by spraying the mist chemical liquid Ms from the liquid discharge unit 1141 provided in the sheet manufacturing apparatus 1100 according to the second embodiment. It may be a sterilization step (S3) including an application step. Or it is a sterilization process (S3) including the water vapor | steam injection process by the pulp origin product manufacturing apparatus with which the sterilization part 1240 which performs the sterilization process by the injection of the high temperature water vapor | steam St with which the sheet | seat manufacturing apparatus 1200 which concerns on 3rd Embodiment is provided Also good. Or the humidification process by the pulp origin product manufacturing apparatus provided with the sterilization part 1340 provided with the sterilization process by irradiation of the microwave Mw from the microwave irradiation part 1342 with which the sheet manufacturing apparatus 1300 which concerns on 4th Embodiment is equipped, and a microwave It may be a sterilization step (S3) including an irradiation step.

DESCRIPTION OF SYMBOLS 10 ... Crushing part, 20 ... Defibration part, 30 ... Sorting part, 40 ... 1st web formation part (sterilization part), 50 ... Mixing part, 60 ... Deposition part, 70 ... 2nd web formation part, 80 ... Sheet Forming unit, 90 ... cutting unit, 1010 ... manufacturing unit, 200 ... raw material supply unit, 300 ... recycled paper discharge unit, 1000 ... sheet manufacturing apparatus.

Claims

A raw material supply section for supplying raw materials;
A defibrating unit for defibrating the raw material to form raw material fibers;
A pressurizing unit that pressurizes the deposit in which the raw fiber is deposited in the thickness direction,
A sterilizing unit is provided between the defibrating unit and the pressing unit.
A sheet manufacturing apparatus.
The sterilizing part is
It has a transport means for transporting the raw fiber from the defibrating unit toward the pressurizing unit,
The sheet manufacturing apparatus according to claim 1.
3. The sheet manufacturing apparatus according to claim 1, wherein the sterilizing unit includes a light irradiation unit that irradiates a sterilizing line.
The sterilizing part is
It has a liquid discharge part that discharges the bactericidal solution.
The sheet manufacturing apparatus according to claim 1 or 2.
The sterilizing part is
It has a water vapor jet part that jets water vapor heated to a sterilizable temperature,
The sheet manufacturing apparatus according to claim 1 or 2.
The sterilizing unit is a humidifying unit for humidifying the raw material,
A microwave irradiation unit for irradiating microwaves,
The sheet manufacturing apparatus according to claim 1 or 2.
A raw material supply process for supplying raw materials;
Defibrating step of defibrating the raw material and forming raw material fiber;
A sterilization step of sterilizing the raw fiber;
Depositing the raw fibers to form a deposit;
A pressurizing step of pressurizing the deposit in a thickness direction,
The sheet manufacturing method characterized by the above-mentioned.
The sterilization step includes
Including a conveying step of conveying the raw fiber from the defibration step to the deposition step,
The sheet manufacturing method according to claim 7.
The sterilization step includes
Including a sterilization line irradiation step of irradiating the raw fiber with a sterilization line;
The sheet manufacturing method according to claim 7 or 8.
The sterilization step includes
Including a disinfectant solution discharging step of discharging the disinfectant solution to the raw fiber,
The sheet manufacturing method according to claim 7 or 8, characterized in that.
The sterilization step includes
Including a water vapor injection step of injecting water vapor heated to a temperature capable of sterilizing the raw fiber,
The sheet manufacturing method according to claim 7 or 8, characterized in that.
The sterilization step includes
A humidifying step of humidifying the raw fiber;
A microwave irradiation step of irradiating microwaves,
The sheet manufacturing method according to claim 7 or 8, characterized in that.
A raw material supply section for supplying raw materials;
A defibrating unit for defibrating the raw material to form raw material fibers;
A dispersion part for dispersing the raw fiber,
A sterilizing part is provided between the defibrating part and the dispersing part,
An apparatus for producing a pulp-derived product characterized in that.
A raw material supply process for supplying raw materials;
A defibrating step of defibrating the cut raw material to form raw material fibers;
A sterilization step of sterilizing the raw fiber;
Mixing step of dispersing the raw fiber,
The sterilization step includes a conveyance step of conveying the raw fiber from the defibration step to the mixing step.
A pulp-derived product manufacturing method characterized by the above.