JP2022035103A - Fiber body manufacturing method and fiber body manufacturing device - Google Patents

Abstract

To manufacture a recycled paper having length-average fiber length that is longer than that of a used paper as main material.SOLUTION: A fiber body manufacturing method includes: a first supply step to supply a first raw material M1A including a first fiber group; a second supply step to supply a second raw material M1B including a second fiber group having length-average fiber length longer than the length-average fiber length of the first fiber group; a formation step to form a first fiber body S1 including the first raw material M1A and the second raw material M1B. The length-average fiber length of the first fiber body S1 is equal to or longer than the length-average fiber length of the first fiber group.SELECTED DRAWING: Figure 2

Description

The present invention relates to a fiber body manufacturing method and a fiber body manufacturing apparatus.

Conventionally, a fiber body manufacturing apparatus for manufacturing recycled paper from used used paper as a raw material has been known. For example, in Patent Document 1, a first material supply unit that supplies a first material containing a first fiber and a second material supply unit that supplies a second material containing a second fiber having a length shorter than that of the first fiber are supplied. A sheet manufacturing apparatus as a fiber body manufacturing apparatus for easily adjusting the rigidity of the recycled paper to be manufactured by controlling the operation with and is disclosed.

JP-A-2019-065411

However, the fiber body as recycled paper produced by the fiber body manufacturing apparatus described in Patent Document 1 has a shorter fiber length than the first raw material which is recycled paper. That is, when recycled paper is repeatedly manufactured using recycled paper as a main raw material, there is a risk that the fiber length of the recycled paper will be significantly shortened.

The fiber body manufacturing method includes a first supply step of supplying a first raw material including a first fiber group, and a second fiber group having a longer average length fiber length as compared with the average length fiber length of the first fiber group. A second supply step of supplying a second raw material containing the above, and a forming step of forming a first fiber body containing the first raw material and the second raw material are included, and the length average of the first fiber body is included. The fiber length is equal to or greater than the average fiber length of the first fiber group.

The fiber body manufacturing method is a fiber body manufacturing method for manufacturing a second fiber body using the first fiber body, and is a third supply step of supplying the first fiber body as a third raw material, and the above-mentioned. The fourth supply step of supplying the fourth raw material including the fourth fiber group having a longer average length fiber length as compared with the length average fiber length of the third fiber group contained in the first fiber body, and the first fiber. The second fiber includes a defibration step of defibrating the body and a forming step of forming a second fiber containing the first fiber defibrated in the defibration step and the fourth raw material. The body length average fiber length is equal to or greater than the length average fiber length of the first fiber body.

The fiber body manufacturing apparatus includes a first supply unit that supplies the first raw material including the first fiber group, and a second fiber group having a longer average length fiber length as compared with the average length fiber length of the first fiber group. A second supply unit for supplying a second raw material containing the above, and a forming unit for forming a first fiber body containing the first raw material and the second raw material are provided, and the length average of the first fiber body is provided. The fiber length is equal to or greater than the average fiber length of the first fiber group.

The schematic diagram which shows the schematic structure of the fiber body manufacturing apparatus which concerns on embodiment. A flowchart illustrating a fiber body manufacturing method for manufacturing recycled paper. A table illustrating Examples 1 to 5 and Comparative Example 1. A flowchart illustrating a fiber body manufacturing method for manufacturing raw paper again. A table illustrating Example 6.

1. 1. Embodiment 1-1. The configuration of the fiber body manufacturing apparatus and the fiber body manufacturing method The schematic configuration of the fiber body manufacturing apparatus 100 according to the first embodiment will be described. The fiber body manufacturing apparatus 100 manufactures a new fiber body, that is, recycled paper, for example, by dryly defibrating used used paper as a raw material, fiberizing it, and then pressurizing, heating, and cutting it.

The fiber body manufacturing apparatus 100 shown in FIG. 1 includes a raw material supply unit 11, a coarse crushing unit 12, a defibration unit 13, a sorting unit 14, a first web forming unit 15, a subdivision unit 16, a mixing unit 17, a loosening unit 18, and a first. 2 The web forming portion 19, the sheet forming portion 20, the cutting portion 21, and the stock portion 22 are provided. Further, the fiber body manufacturing apparatus 100 includes humidifying units 231 to 236 and a control unit 3. The operation of each part included in the fiber body manufacturing apparatus 100 is controlled by the control unit 3. In the fiber body manufacturing apparatus 100 of the present embodiment, the raw material supply unit 11 is on the upstream side and the stock unit 22 is on the downstream side.

The control unit 3 controls the operation of each part of the fiber body manufacturing apparatus 100 to execute the fiber body manufacturing method. The control unit 3 has a CPU (Central Processing Unit) 31 and a storage unit 32. The CPU 31 can execute various programs stored in the storage unit 32, and can, for example, perform various determinations and various commands.

The control unit 3 may be built in the fiber body manufacturing apparatus 100, or may be provided in an external device such as an external computer. Further, the external device is connected to the fiber body manufacturing device 100 via a network such as, for example, when communicating with the fiber body manufacturing device 100 via a cable or the like, or when wirelessly communicating with the fiber body manufacturing device 100. There are cases. Further, the CPU 31 and the storage unit 32 may be integrated into one unit, for example, or the CPU 31 may be built in the fiber body manufacturing apparatus 100 and the storage unit 32 may be an external computer or the like. It may be provided in an external device, or the storage unit 32 may be built in the fiber body manufacturing apparatus 100, and the CPU 31 may be provided in an external device such as an external computer.

As shown in FIG. 2, the fiber body manufacturing method for manufacturing the first fiber body S1 which is recycled paper is performed by the fiber body manufacturing apparatus 100, and the first supply step, the second supply step, and the coarse crushing are performed. It has a process, a defibration process, a sorting process, a first web forming process, a dividing process, a binder supply process, a loosening process, a second web forming process, a pressurizing process, a heating process, and a cutting process.

The configuration of each part included in the fiber body manufacturing apparatus 100 will be described with reference to FIGS. 1 and 2.
The raw material supply unit 11 has a first supply step of supplying the first raw material M1A containing the first fiber group to the coarse crushing unit 12, and a second supply step of supplying the second raw material M1B containing the second fiber group to the coarse crushing unit 12. This is the part where the supply process is performed. The raw material supply unit 11 includes a first supply unit 11A that supplies the first raw material M1A to the coarse crushing unit 12, and a second supply unit 11B that supplies the second raw material M1B to the coarse crushing unit 12. Hereinafter, when it is not necessary to distinguish between the first raw material M1A and the second raw material M1B, it is simply referred to as raw material M1.

The raw material M1 supplied to the crushed portion 12 is made of a fiber material containing fibers, for example, in the form of a sheet. As the fiber material, hardwood, conifer, bamboo, bagasse, banana, kenaf, cotton, palm, straw, reed, corn, mulberry, ganpi and the like can be used.
In the second supply step of the present embodiment, the second raw material M1B including the second fiber group having a longer average length fiber length as compared with the average length fiber length of the first fiber group contained in the first raw material M1A is supplied. Will be done.
As an index showing the length of the fiber, a length average fiber length LL and a number average fiber length LN are known. The length average fiber length LL and the number average fiber length LN are represented by the following formulas (1) and (2).

In the formulas (1) and (2), ni indicates the number of fibers of the fraction i, and lil indicates the average length of the fibers of the fraction i. Further, i is a natural number.

In the present embodiment, the first raw material M1A and the second raw material M1B are sheet-shaped recycled paper, and the configuration of the fiber body manufacturing apparatus 100 supplied in the form of a sheet is exemplified. The first supply unit 11A and the second supply unit 11B have, for example, a stacker for stacking and accumulating used paper, and an automatic loading device for sending the used paper from the stacker to the coarsely crushed unit 12.

The coarse crushing unit 12 is a portion that performs a crushing step of coarsely crushing the first raw material M1A and the second raw material M1B supplied from the raw material supply unit 11 in the air or the like. The crushing portion 12 has a pair of crushing blades 121 and a chute 122.

The pair of coarse crushing blades 121 rotate in opposite directions to coarsely crush the first raw material M1A and the second raw material M1B between them, that is, cut them into coarse crushed pieces M2. The shape and size of the coarsely crushed piece M2 are preferably suitable for the defibration treatment in the defibration portion 13, for example, a small piece having a side length of 100 mm or less, and a small piece of 10 mm or more and 70 mm or less. Is more preferable.

The chute 122 is arranged below the pair of coarse crushing blades 121 and has a funnel shape, for example. As a result, the chute 122 can receive the coarsely crushed pieces M2 that have been coarsely crushed by the coarsely crushed blade 121 and have fallen.

Further, above the chute 122, a humidifying portion 231 is arranged adjacent to the pair of coarse crushing blades 121. The humidifying section 231 humidifies the coarsely crushed pieces M2 in the chute 122. The humidifying section 231 has a filter containing moisture, and is composed of a vaporization type humidifier that supplies humidified air with increased humidity to the coarse crushed piece M2 by passing air through the filter. By supplying the humidified air to the coarse crushed pieces M2, it is possible to prevent the coarse crushed pieces M2 from adhering to the chute 122 or the like due to static electricity.

The chute 122 is connected to the defibration portion 13 via a tube 241. The coarsely crushed pieces M2 collected in the chute 122 pass through the tube 241 and are conveyed to the defibration section 13.

The defibration section 13 is a portion for performing a defibration step of defibrating the first raw material M1A and the second raw material M1B coarsely crushed by the coarse crushing section 12. In the defibration step, the first fiber is extracted from the first fiber group contained in the first raw material M1A, and the second fiber is extracted from the second fiber group contained in the second raw material M1B.
The defibration unit 13 defibrates the coarsely crushed pieces M2 containing the first fiber group and the second fiber group in the air, that is, in a dry manner. By the defibration treatment in the defibration section 13, the defibrated product M3 can be produced from the coarsely crushed pieces M2. Here, "defibrating" means unraveling the coarsely crushed piece M2, which is formed by binding a plurality of fibers, into individual fibers. Then, this unraveled product becomes the defibrated product M3. The shape of the defibrated product M3 is linear or strip-shaped. Further, the defibrated products M3 may exist in a state of being intertwined and agglomerated, that is, in a state of forming a so-called "lump".

For example, in the present embodiment, the defibration portion 13 is composed of an impeller mill having a rotor that rotates at high speed and a liner located on the outer periphery of the rotor. The coarsely crushed piece M2 that has flowed into the defibration portion 13 is sandwiched between the rotor and the liner and defibrated.

The defibration section 13 can generate an air flow from the coarse crushing section 12 toward the sorting section 14, that is, an air flow, by rotating the rotor. As a result, the coarsely crushed piece M2 can be sucked from the tube 241 to the defibration portion 13. Further, after the defibration treatment, the defibrated product M3 can be sent to the sorting unit 14 via the tube 242.

The defibration unit 13 also has a function of separating resin particles adhering to the defibration product M3, coloring materials such as ink and toner, and substances such as bleeding preventive agents from the fibers.

The defibration section 13 is connected to the sorting section 14 via a tube 242. The defibrated product M3 passes through the tube 242 and is conveyed to the sorting unit 14.

A blower 261 is installed in the middle of the pipe 242. The blower 261 is an airflow generator that generates an airflow toward the sorting unit 14. This promotes the delivery of the defibrated product M3 to the sorting unit 14.

The sorting unit 14 is a part that performs a sorting step of sorting the defibrated product M3 according to the size of the fiber length. In the sorting unit 14, the defibrated product M3 is sorted into a first sorted product M4-1 and a second sorted product M4-2 which is larger than the first sorted product M4-1. The first selected product M4-1 has a size suitable for the subsequent production of the first fiber body S1. The second selected product M4-2 includes, for example, those with insufficient defibration, those in which the defibrated fibers are excessively aggregated, and the like.

The sorting unit 14 has a drum unit 141 and a housing unit 142 for accommodating the drum unit 141.

The drum portion 141 is a sieve formed of a cylindrical net body and rotates around the central axis thereof. The defibrated product M3 flows into the drum portion 141. Then, by rotating the drum portion 141, the defibrated product M3 smaller than the mesh opening is sorted as the first sorted product M4-1, and the defibrated product M3 having a size larger than the mesh opening is It is sorted as a second sort product M4-2. The first sorted object M4-1 falls from the drum portion 141.

The second sort product M4-2 is sent out to the pipe 243 connected to the drum portion 141. The side of the pipe 243 opposite to the drum portion 141, that is, the downstream side is connected to the pipe 241. The second sorted product M4-2 that has passed through the pipe 243 merges with the coarse crushed piece M2 in the pipe 241 and flows into the defibration portion 13 together with the coarse crushed piece M2. As a result, the second sorted product M4-2 is returned to the defibration section 13 and defibrated together with the coarsely crushed piece M2. Further, the first sorted product M4-1 from the drum portion 141 falls while being dispersed in the air, and heads toward the first web forming portion 15 located below the drum portion 141.

The first web forming unit 15 is a part that performs the first web forming step of forming the first web M5 from the first selected product M4-1. The first web forming portion 15 has a mesh belt 151, three tension rollers 152, and a suction portion 153.

The mesh belt 151 is an endless belt on which the first sort product M4-1 is deposited. The mesh belt 151 is hung around three tension rollers 152. Then, the first sorter M4-1 on the mesh belt 151 is conveyed to the downstream side by the rotational drive of the tension roller 152.

The size of the first sorted product M4-1 is larger than the opening of the mesh belt 151. As a result, the first sorted product M4-1 is restricted from passing through the mesh belt 151, and thus can be deposited on the mesh belt 151. Further, since the first sorted product M4-1 is conveyed to the downstream side together with the mesh belt 151 while being deposited on the mesh belt 151, it is formed as a layered first web M5.

Further, the first sorted product M4-1 contains, for example, dust, dust, fine particle CM such as a coloring material, and the like. Dust and dust can be produced, for example, by coarse crushing and defibration. Since the fine particle CM is smaller than the opening of the mesh belt 151, it passes through the mesh belt 151 and falls further downward. As a result, the first fiber and the second fiber are deposited on the mesh belt 151 as the first web M5.

The suction unit 153 is a suction mechanism that sucks air from below the mesh belt 151. As a result, the fine particle CM that has passed through the mesh belt 151 can be sucked together with the air.

Further, the suction unit 153 is connected to the collection unit 27 via the pipe 244. The fine particle CM sucked by the suction unit 153 is collected by the collection unit 27.

A pipe 245 is further connected to the recovery unit 27. Further, a blower 262 is installed in the middle of the pipe 245. By operating the blower 262, a suction force can be generated at the suction unit 153. This promotes the formation of the first web M5 on the mesh belt 151. The first web M5 has the fine particle CM removed. Further, the fine particle CM passes through the pipe 244 and reaches the recovery unit 27 by the operation of the blower 262.

The housing portion 142 is connected to the humidifying portion 232. The humidifying section 232 is composed of a vaporization type humidifier. As a result, humidified air is supplied to the inside of the housing portion 142. The humidified air can humidify the first sorted product M4-1, and thus can prevent the first sorted product M4-1 from adhering to the inner wall of the housing portion 142 due to electrostatic force.

A humidifying section 235 is arranged on the downstream side of the sorting section 14. The humidifying section 235 is composed of an ultrasonic humidifier that sprays water. As a result, water can be supplied to the first web M5, and thus the amount of water in the first web M5 is adjusted. By this adjustment, it is possible to suppress the adsorption of the first web M5 to the mesh belt 151 due to the electrostatic force. As a result, the first web M5 is easily peeled off from the mesh belt 151 at the position where the mesh belt 151 is folded back by the tension roller 152. A subdivision portion 16 is arranged on the downstream side of the humidifying portion 235.

The subdivided portion 16 is a portion for performing a dividing step for dividing the first web M5 peeled from the mesh belt 151. The subdivision portion 16 has a propeller 161 rotatably supported and a housing portion 162 for accommodating the propeller 161. Then, the first web M5 can be divided by the first web M5 being caught in the rotating propeller 161. The divided first web M5 becomes a subdivision M6. Further, the subdivided body M6 descends in the housing portion 162.

The housing portion 162 is connected to the humidifying portion 233. The humidifying section 233 is composed of a vaporization type humidifier. As a result, humidified air is supplied into the housing portion 162. This humidified air can also prevent the subdivision M6 from adhering to the inner wall of the propeller 161 or the housing portion 162 due to electrostatic force.

A mixing portion 17 is arranged on the downstream side of the subdivision portion 16. The mixing unit 17 supplies a binder P1 that binds the first fiber and the second fiber constituting the subdivision M6, and performs a binder supply step of mixing the subdivision M6 and the binder P1. It is a part. The mixing unit 17 has a binder supply unit 171, a pipe 172, and a blower 173.

The pipe 172 connects the housing portion 162 of the subdivision portion 16 and the housing portion 182 of the loosening portion 18, and is a flow path through which the mixture M7 of the subdivision M6 and the binder P1 passes.

A binder material supply unit 171 is connected in the middle of the pipe 172. The binder supply unit 171 has a screw feeder 174. By rotationally driving the screw feeder 174, the binder P1 can be supplied to the pipe 172 as powder or particles. The binder P1 supplied to the tube 172 is mixed with the fragment M6 to form a mixture M7.

The binder P1 binds fibers to each other in a later heating step. For example, a thermoplastic resin, a curable resin, or the like can be used, but it is preferable to use a thermoplastic resin. Examples of the thermoplastic resin include AS resin, ABS resin, polyethylene, polypropylene, polyolefin such as ethylene-vinyl acetate copolymer (EVA), modified polyolefin, acrylic resin such as polymethylmethacrylate, polyvinyl chloride, polystyrene and polyethylene. Polyester such as terephthalate and polybutylene terephthalate, polyamide (nylon) such as nylon 6, nylon 46, nylon 66, nylon 610, nylon 612, nylon 11, nylon 12, nylon 6-12 and nylon 6-66, polyphenylene ether, polyacetal. , Polyether, Polyphenylene oxide, Polyether ether ketone, Polycarbonate, Polyphenylene sulfide, Thermoplastic polyimide, Polyetherimide, Liquid crystal polymers such as aromatic polyester, styrene-based, Polyethylene-based, Polyvinyl chloride-based, Polyethylene-based, Polyester-based, Examples thereof include various thermoplastic elastomers such as polyamide-based, polybutadiene-based, transpolyisoprene-based, fluororubber-based, and chlorinated polyethylene-based, and one or a combination of two or more selected from these can be used. Preferably, as the thermoplastic resin, polyester or a resin containing the same is used. Further, the binder P1 may be a vegetable material such as starch or dextrin made from corn starch or the like.

In addition to the binder P1, for example, a colorant for coloring the fibers, and for suppressing the aggregation of the fibers and the aggregation of the binder P1 are supplied from the binder supply unit 171. It may contain a coagulation inhibitor, a flame retardant for making fibers and the like hard to burn.

Further, in the middle of the pipe 172, a blower 173 is installed on the downstream side of the binder material supply unit 171. The blower 173 can generate an air flow toward the loosening portion 18. By this air flow, the subdivision M6 and the binder P1 can be agitated in the pipe 172. As a result, the mixture M7 can flow into the loosening portion 18 in a state where the subdivision M6 and the binder P1 are uniformly dispersed. Further, the fragment M6 in the mixture M7 is loosened in the process of passing through the tube 172 to become a finer fibrous form.

The unraveling portion 18 is a portion of the mixture M7 that performs an unraveling step of unraveling entangled fibers with each other. The loosening portion 18 has a drum portion 181 and a housing portion 182 for accommodating the drum portion 181.

The drum portion 181 is a sieve formed of a cylindrical net body and rotates around the central axis thereof. The mixture M7 flows into the drum portion 181. Then, as the drum portion 181 rotates, the fibers or the like of the mixture M7, which are smaller than the mesh size of the mesh, can pass through the drum portion 181. At that time, the mixture M7 will be loosened.

Further, the mixture M7 loosened by the drum portion 181 falls while being dispersed in the air, and heads toward the second web forming portion 19 located below the drum portion 181. The second web forming unit 19 is a portion that performs a second web forming step of forming the second web M8 from the mixture M7. The second web forming portion 19 has a mesh belt 191, a tension roller 192, and a suction portion 193.

The mesh belt 191 is an endless belt on which the mixture M7 is deposited. The mesh belt 191 is hung around four tension rollers 192. Then, the mixture M7 on the mesh belt 191 is conveyed to the downstream side by the rotational drive of the tension roller 192.

Further, most of the mixture M7 on the mesh belt 191 is larger than the opening of the mesh belt 191. This restricts the mixture M7 from passing through the mesh belt 191 and thus can be deposited on the mesh belt 191. Further, since the mixture M7 is conveyed to the downstream side together with the mesh belt 191 while being deposited on the mesh belt 191, it is formed as a layered second web M8.

The suction unit 193 can suck air from below the mesh belt 191. This allows the mixture M7 to be sucked onto the mesh belt 191 and thus facilitates the deposition of the mixture M7 on the mesh belt 191.

A tube 246 is connected to the suction unit 193. Further, a blower 263 is installed in the middle of the pipe 246. By operating the blower 263, a suction force can be generated at the suction unit 193.

The housing portion 182 is connected to the humidifying portion 234. The humidifying section 234 is composed of a vaporization type humidifier similar to the humidifying section 231. As a result, humidified air is supplied into the housing portion 182. The humidified air can humidify the inside of the housing portion 182, and thus can prevent the mixture M7 from adhering to the inner wall of the housing portion 182 by electrostatic force.

A humidifying portion 236 is arranged on the downstream side of the loosening portion 18. The humidifying section 236 is composed of an ultrasonic humidifier. As a result, water can be supplied to the second web M8, and thus the amount of water in the second web M8 is adjusted. By this adjustment, it is possible to suppress the adsorption of the second web M8 to the mesh belt 191 due to the electrostatic force. As a result, the second web M8 is easily peeled off from the mesh belt 191 at the position where the mesh belt 191 is folded back by the tension roller 192.

A sheet forming portion 20 is arranged on the downstream side of the second web forming portion 19. The sheet forming portion 20 pressurizes and heats the second web M8 to form the sheet-shaped first fiber body S1. The sheet forming portion 20 has a pressurizing portion 201 and a heating portion 202. The pressurizing unit 201 is a portion that performs a pressurizing step of pressurizing the second web M8. The heating unit 202 is a portion that heats the second web M8 to perform a heating step of binding the first fiber and the second fiber contained in the second web M8 with the binder P1.

The pressurizing section 201 has a pair of calendar rollers 203, and the second web M8 can be pressurized between them without heating. This increases the density of the second web M8. Then, the second web M8 is conveyed toward the heating unit 202. One of the pair of calendar rollers 203 is a driven roller driven by the operation of a motor, and the other is a driven roller.

The heating unit 202 has a pair of heating rollers 204. The heating roller 204 includes a heater and is heated to a preset temperature by the heater. The pair of heating rollers 204 can pressurize while heating while sandwiching the second web M8. By this heating and pressurizing, the binder P1 is melted in the second web M8, and the fibers are bound to each other via the melted binder P1. As a result, the first fiber body S1 in which the first fiber and the second fiber are bonded is formed. Then, the first fiber body S1 is conveyed toward the cutting portion 21. One of the pair of heating rollers 204 is a driving roller driven by the operation of a motor, and the other is a driven roller.

A cutting portion 21 is arranged on the downstream side of the sheet forming portion 20. The cutting portion 21 is a portion for performing a cutting step for cutting the first fiber body S1. The cutting portion 21 has a first cutter 211 and a second cutter 212.

The first cutter 211 cuts the first fiber body S1 in a direction intersecting the transport direction of the first fiber body S1.

The second cutter 212 cuts the first fiber body S1 in a direction parallel to the transport direction of the first fiber body S1 on the downstream side of the first cutter 211.

By cutting the first cutter 211 and the second cutter 212 in this way, a sheet-shaped first fiber body S1 having a predetermined size can be obtained. Then, the first fiber body S1 is further transported to the downstream side and accumulated in the stock portion 22. The stock portion 22 has a tray or a stacker on which the first fiber body S1 of a predetermined size is placed.

The binding material supply step to the heating step described above is a binding step of binding the first fiber contained in the first fiber group and the second fiber contained in the second fiber group. Further, the sorting step to the cutting step including the binding step is a forming step of forming the first fiber body S1 including the first raw material M1A and the second raw material M1B.

Further, the cutting section 21 from the sorting section 14 described above is a forming section that forms the first fiber body S1 including the first raw material M1A and the second raw material M1B.

In the present embodiment, the configuration for supplying the sheet-shaped first raw material M1A and the second raw material M1B is exemplified, but the second raw material is not limited to the sheet shape, but is a powder-shaped or block-shaped fiber material. You may. When powdered fiber material is supplied as the second raw material, coarse crushing and defibration are not required. Therefore, the first raw material M1A is coarsely crushed in the coarse crushing step, and the first raw material is defibrated in the defibrating step. Will be done. The powdery second raw material can be supplied from a cartridge containing the powdery fiber material.

Further, the second raw material M1B binds the first fiber contained in the first fiber group of the first raw material M1A and the second fiber contained in the second fiber group of the second raw material M1B. The landing material P1 may be included. When the binding material P1 is included in the sheet-shaped second raw material M1B and supplied, the binding material supply unit 171 becomes unnecessary, so that the fiber body manufacturing apparatus 100 can be miniaturized. Further, when the binding material P1 is included in the sheet-shaped second raw material M1B and supplied, the binding material supply step becomes unnecessary, so that the flow for producing the fiber body can be simplified. The raw material in which the binder P1 is contained in the second raw material M1B can be formed by ejecting the binder P1 into droplets on the sheet-shaped second raw material M1B by an inkjet method. By controlling the discharge amount of the binder P1 to be discharged, the binder P1 having a predetermined mass ratio can be contained in the second raw material M1B.

Further, the binder P1 may be contained in the first raw material M1A. For example, when used paper from which the first fiber body S1 manufactured by the above-mentioned fiber body manufacturing apparatus 100 has been used is used as the first raw material M1A, the fibers of the first fiber body S1 are used in the first raw material M1A. The binding material P1 to be bound is contained. When the amount of the binder P1 contained in the first raw material M1A is small, it is preferable that the mass ratio of the binder of the second raw material M1B is larger than the mass ratio of the binder of the first raw material M1A. When the amount of the binder P1 contained in the first raw material M1A is large, it is preferable that the mass ratio of the binder of the second raw material M1B is smaller than the mass ratio of the binder of the first raw material M1A. Thereby, the total amount of the binder P1 to be used can be adjusted.

1-2. Examples 1-5
Next, an example and a comparative example in which the first fiber body S1 is manufactured by using the fiber body manufacturing apparatus 100 of the present embodiment and the fiber body manufacturing method will be described with reference to FIG.

In FIG. 3, in order from the upper row, the first raw material M1A supplied in the first supply step, the second raw material M1B supplied in the second supply step, the supply amount of the second raw material M1B, and the first formed by the fiber body manufacturing apparatus 100. The fiber body S1 and the evaluation result are shown. The first raw material M1A is a sheet-shaped raw material containing a first fiber group containing hardwood as a main component. The second raw material M1B is a sheet-shaped raw material containing a second fiber group containing a broad-leaved tree as a main component, and contains a binder P1 for binding the fibers to each other.

In the columns of each Example and Comparative Example, the length average fiber length LL [μm] calculated by the formula (1) of the first raw material M1A and the second raw material M1B supplied to the fiber body manufacturing apparatus 100, and the formula ( Each supply condition of the number average fiber length LN [μm] calculated in 2), the mass ratio [%] of the second raw material M1B to the first raw material M1A, and the first fiber body S1 formed by the fiber body manufacturing apparatus 100. The length average fiber length LL [μm] calculated by the formula (1) of the above is shown. Further, in the lower part of each Example and Comparative Example, the evaluation results represented by the three stages of A, B, and C are shown.

The evaluation result is obtained by LLS / LLA when the average length fiber length of the first raw material M1A is LLA and the average length fiber length of the first fiber body S1 is LLS.
As the evaluation result A, LLS / LLA ≧ 1.01, that is, the first fiber body S1 having a length average fiber length LLS 1% or more longer than the length average fiber length LLA of the first raw material M1A was obtained. Show the case.
The evaluation result B has 1.0 ≦ LLS / LLA <1.01, that is, the first having a length average fiber length LLS that is 0% or more and less than 1% longer than the length average fiber length LLA of the first raw material M1A. The case where the fiber body S1 is obtained is shown.
The evaluation result C shows a case where LLS / LLA <1.0, that is, the length average fiber length LLS of the first fiber body S1 is shorter than the length average fiber length LLA of the first raw material M1A.

In Comparative Example 1, the first raw material M1A having an average length fiber length LL = 800 μm and a number average fiber length LN = 560 μm was supplied in the first supply step, and the average length fiber length LL was supplied in the second supply step. A second raw material M1B having = 800 μm and a number average fiber length LN = 560 μm was supplied. That is, Comparative Example 1 is a case where the same raw material is supplied to the fiber body manufacturing apparatus 100. The average fiber length of the first fiber body S1 manufactured by the fiber body manufacturing apparatus 100 and the fiber body manufacturing method was LL = 753 μm. The first fiber body S1 manufactured under the conditions of Comparative Example 1 is shorter than the average fiber length of the first raw material M1A. Even if the second raw material M1B having the same length average fiber length as the first raw material M1A is supplied, the first fiber body S1 having the same length average fiber length cannot be produced. That is, when recycled paper is repeatedly manufactured using the first fiber body S1, which is recycled paper, as a main raw material, the average length of the fibers gradually becomes shorter.

In Examples 1 to 5, the second raw material M1B having a longer average length fiber length than the average length fiber length of the first raw material M1A was supplied.
In Example 1, the first raw material M1A having a length average fiber length LL = 800 μm and a number average fiber length LN = 560 μm is supplied in the first supply step, and the length average fiber length LL is supplied in the second supply step. The second raw material M1B having a number average fiber length of LN = 730 μm was supplied at a mass ratio of 20% with respect to the first raw material M1A. The average fiber length of the first fiber body S1 manufactured by the fiber body manufacturing apparatus 100 and the fiber body manufacturing method was LL = 810 μm. By adding the second raw material M1B, which has a longer average fiber length than the first raw material M1A, to the first raw material M1A, which is the main raw material, the length is 1% or more longer than the average fiber length of the first raw material M1A. It was possible to obtain the first fiber body S1 which is a recycled paper having an average fiber length.

In Example 2, in the first supply step, the first raw material M1A having a length average fiber length LL = 800 μm and a number average fiber length LN = 560 μm is supplied, and in the second supply step, the length average fiber length LL is supplied. The second raw material M1B having = 1200 μm and the number average fiber length LN = 840 μm was supplied at a mass ratio of 12% with respect to the first raw material M1A. The average fiber length of the first fiber body S1 manufactured by the fiber body manufacturing apparatus 100 and the fiber body manufacturing method was LL = 815 μm. By adding the second raw material M1B having a longer average fiber length than the second raw material exemplified in Example 1 to the first raw material M1A, the length of the first raw material M1A can be reduced with a smaller supply amount than that of Example 1. It was possible to obtain the first fiber body S1 having a length average fiber length 1% or more longer than the average fiber length.

In Example 3, the first raw material M1A having a length average fiber length LL = 800 μm and a number average fiber length LN = 560 μm is supplied in the first supply step, and the length average fiber length LL is supplied in the second supply step. The second raw material M1B having = 1500 μm and the number average fiber length LN = 1050 μm was supplied in a mass ratio of 7% with respect to the first raw material M1A. The average fiber length of the first fiber body S1 manufactured by the fiber body manufacturing apparatus 100 and the fiber body manufacturing method was LL = 812 μm. By adding the second raw material M1B having a longer average fiber length than the second raw material exemplified in Example 2 to the first raw material M1A, the supply amount of the first raw material M1A is further smaller than that of the second raw material. It was possible to obtain the first fiber body S1 having a length average fiber length 1% or more longer than the length average fiber length.

In Example 4, the first raw material M1A having a length average fiber length LL = 800 μm and a number average fiber length LN = 560 μm is supplied in the first supply step, and the length average fiber length LL is supplied in the second supply step. The second raw material M1B having = 1500 μm and the number average fiber length LN = 780 μm was supplied in a mass ratio of 7% with respect to the first raw material M1A. That is, in Example 4, the second raw material M1B having a shorter number average fiber length than that of Example 3 was used. The average fiber length of the first fiber body S1 manufactured by the fiber body manufacturing apparatus 100 and the fiber body manufacturing method was LL = 801 μm. The length average fiber of the first fiber body S1 obtained in Example 3 by adding the second raw material M1B having a shorter number average fiber length than the second raw material exemplified in Example 3 to the first raw material M1A. Although it was shorter than the length, it was possible to obtain the first fiber body S1 having a length average fiber length longer than the length average fiber length of the first raw material M1A. In other words, the second raw material M1B having a long number average fiber length has an effect of increasing the length average fiber length of the first fiber body S1.

In Example 5, the first raw material M1A having a length average fiber length LL = 800 μm and a number average fiber length LN = 560 μm is supplied in the first supply step, and the length average fiber length LL is supplied in the second supply step. The second raw material M1B having = 1800 μm and the number average fiber length LN = 560 μm was supplied at a mass ratio of 7% with respect to the first raw material M1A. That is, in Example 5, the second raw material M1B having a longer average fiber length than the first raw material M1A was used. The average fiber length of the first fiber body S1 manufactured by the fiber body manufacturing apparatus 100 and the fiber body manufacturing method was LL = 801 μm. Even when the second raw material M1B, which has a longer average fiber length than the first raw material M1A, is added to the first raw material M1A, the length average fiber length longer than the length average fiber length of the first raw material M1A. It was possible to obtain the first fiber body S1 having the above.

From the results of Examples 1 to 5, by adding a raw material having a longer average fiber length than the first raw material M1A, which is the main raw material, as the second raw material M1B, the length average is higher than that of the first raw material M1A. It becomes possible to manufacture the first fiber body S1 having a long fiber length. That is, it is possible to obtain the first fiber body S1 as recycled paper having a longer average fiber length than the first raw material M1A as used paper.
From the results of Examples 1 to 3, the second raw material M1B to be added to the first raw material M1A, which is the main raw material, by adding the raw material having a longer average fiber length as the second raw material M1B. The supply can be reduced.
From the results of Examples 3 to 5, it can be said that the number average fiber length of the second raw material M1B is preferably equal to or larger than the number average fiber length of the first raw material M1A.

1-3. Repeat cycle (recycled recycled paper)
FIG. 4 is a flowchart showing a fiber body manufacturing method for manufacturing a second fiber body which is regenerated paper using the first fiber body S1 which is a recycled paper manufactured by the flow of the fiber body manufacturing method shown in FIG. Is. The apparatus for producing the second fiber body is the same as the fiber body manufacturing apparatus 100 for producing the first fiber body S1, and the first fiber body S1 as the third raw material supplied to the first supply unit 11A and the first fiber body S1 2 The second fiber body is manufactured from the fourth raw material supplied to the supply unit 11B.

The third supply step supplies the first fiber body S1 including the third fiber group. In the fourth supply step, the fourth raw material including the fourth fiber group having a longer average length fiber length as compared with the average length fiber length of the third fiber group is supplied. The third supply step and the fourth supply step are performed by the raw material supply unit 11.

In the coarse crushing step, the first fiber body S1 and the fourth raw material are coarsely crushed in the air. In the defibration step, the first fiber body S1 and the fourth raw material are defibrated in the air. The coarse crushing step is performed in the crushing unit 12.
In the defibration step, the third fiber is extracted from the third fiber group contained in the first fiber body S1, and the fourth fiber is extracted from the fourth fiber group contained in the fourth raw material. The defibration step is performed in the defibration section 13.
When a powdery fiber material is supplied as the fourth raw material, coarse crushing and defibration are not required. Therefore, the first fiber body S1 is coarsely crushed in the coarse crushing step, and the first fiber is coarsely crushed in the defibration step. Body S1 is defibrated.

The forming step forms a second fiber body containing the first fiber body S1 defibrated in the defibration step and the fourth raw material. Since each step included in the forming step is the same as the flow for manufacturing the first fiber body S1, the description thereof will be omitted.

1-4. Example 6
Next, an example in which the second fibrous body, which is the raw paper, is manufactured by using the fibrous body manufacturing apparatus 100 of the present embodiment and the fibrous body manufacturing method will be described with reference to FIG.

In FIG. 5, in order from the upper row, the first fiber body S1 supplied in the third supply step, the fourth raw material supplied in the fourth supply step, the supply amount of the fourth raw material, and the second fiber formed by the fiber body manufacturing apparatus 100 are shown. The body and the evaluation result are shown. The first fiber body S1 is a sheet-like raw material containing a third fiber group containing coniferous trees as a main component. The fourth raw material is a sheet-shaped raw material containing a fourth fiber group containing coniferous trees as a main component, and contains a binder P1 that binds the fibers to each other.

In the column of Example 6, the length average fiber length LL [μm] calculated by the formula (1) of the first fiber body S1 and the fourth raw material supplied to the fiber body manufacturing apparatus 100, and the formula (2). Each supply condition of the calculated number average fiber length LN [μm] and the mass ratio [%] of the fourth raw material to the first fiber body S1 and the formula (1) of the second fiber body formed by the fiber body manufacturing apparatus 100. ) Is shown as the average fiber length LL [μm]. Further, the evaluation result B is shown in the lower part of Example 6.

In Example 6, the first fiber body S1 produced in Example 1 described above is supplied as a third raw material, and the length average fiber length is longer than the length average fiber length of the first fiber body S1. The raw material was supplied. The fourth raw material is the same raw material as the second raw material M1B used in Example 1.
In Example 6, in the third supply step, the first fiber body S1 having an average length fiber length LL = 810 μm and a number average fiber length LN = 570 μm is supplied, and in the fourth supply step, the average length fiber length is supplied. A fourth raw material having LL = 1050 μm and a number average fiber length LN = 730 μm was supplied at a mass ratio of 20% with respect to the first fiber body S1. The average fiber length of the second fiber body manufactured by the fiber body manufacturing apparatus 100 and the fiber body manufacturing method was LL = 818 μm. By adding the fourth raw material having a longer average fiber length than the first fiber body S1 to the first fiber body S1 which is the main raw material, the length average longer than the length average fiber length of the first fiber body S1. A second fiber body having a fiber length could be obtained.

The main raw material of the second fiber is the recycled paper S1 which is produced by adding the second raw material M1B, which has a longer average fiber length than the first raw material M1A, to the first raw material M1A which is recycled paper. As a result, it is a recycled paper that is repeatedly produced by adding a second raw material M1B. That is, it becomes possible to repeatedly manufacture recycled paper having an average fiber length longer than that of the first raw material M1A.

Although it has been described that the fiber body manufacturing method of the present embodiment is to manufacture the first fiber body S1 and the second fiber body by the dry fiber body manufacturing apparatus 100, it may be manufactured by wet paper making.
Further, although the case where the first raw material M1A and the second raw material M1B are fiber materials containing the same hardwood as a main component is exemplified, the first raw material M1A and the second raw material M1B may be different fiber materials. good.

As described above, according to the fiber body manufacturing apparatus 100 and the fiber body manufacturing method according to the present embodiment, the following effects can be obtained.

The fiber body manufacturing method includes a first supply step of supplying the first raw material M1A and a second raw material M1B including a second fiber group having a longer average fiber length than the first fiber group contained in the first raw material M1A. It includes a second supply step of supplying and a forming step of forming a first fiber body S1 including the first raw material M1A and the second raw material M1B. Thereby, it is possible to provide a fiber body manufacturing method capable of manufacturing the first fiber body S1 having a length average fiber length equal to or larger than the length average fiber length of the first fiber group contained in the first raw material M1A. ..

Since the fiber body manufacturing method includes a binding material supply step of supplying the binding material P1 and a heating step of binding the first fiber and the second fiber, the fiber body manufacturing apparatus 100 is a dry type. The first fiber body S1 can be manufactured.

In the fiber body manufacturing method, the binder P1 may be contained in the second raw material M1B and supplied. This eliminates the need for a step of supplying the binder P1, so that the manufacturing step of manufacturing the first fiber body S1 can be simplified.

In the second supply step, the fiber body manufacturing method further increases the length by supplying the second raw material M1B containing the second fiber group having a longer number average fiber length than the first fiber group contained in the first raw material M1A. The first fiber body S1 having a long average fiber length can be manufactured.

Since the fiber body manufacturing method includes a defibration step of defibrating the first raw material M1A, the first fiber can be suitably extracted from the first raw material M1A.

Since the fiber body manufacturing method includes a defibration step of defibrating the first raw material M1A and the second raw material M1B, the first fiber is suitably extracted from the first raw material M1A and the second fiber is suitably extracted from the second raw material M1B. can do.

The fiber body manufacturing method includes a coarse crushing step of coarsely crushing the first raw material M1A, or the first raw material M1A and the second raw material M1B. Thereby, the sheet-shaped first raw material M1A, or the sheet-shaped first raw material M1A and the second raw material M1B can be supplied.

In the fiber body manufacturing method, the binder P1 may be contained in the first raw material M1A. When the amount of the binder P1 contained in the first raw material M1A is small, the mass ratio of the binder P1 contained in the second raw material M1B is made larger than the mass ratio of the binder P1 of the first raw material M1A. 1 Fibrous body S1 can be suitably formed.

In the fiber body manufacturing method, the binder P1 may be contained in the first raw material M1A. When the amount of the binder P1 contained in the first raw material M1A is large, the mass ratio of the binder P1 contained in the second raw material M1B is made smaller than the mass ratio of the binder P1 of the first raw material M1A. 1 Fibrous body S1 can be suitably formed.

The fiber body manufacturing method includes a third supply step of supplying the first fiber body S1 and a fourth raw material including a fourth fiber group having a longer average fiber length than the third fiber group contained in the first fiber body S1. Includes a fourth supply step of supplying the above, and a forming step of forming a second fiber body including the first fiber body S1 and the fourth raw material. As a result, it is possible to produce a second fiber body which is a regenerated paper having a longer average fiber length than the first fiber body S1 which is a main raw material which is recycled paper.

The fiber body manufacturing apparatus 100 includes a first supply unit 11A for supplying the first raw material M1A, and a second raw material including a second fiber group having a longer average fiber length than the first fiber group contained in the first raw material M1A. It includes a second supply unit 11B for supplying M1B, and a forming unit from a sorting unit 14 to a cutting unit 21 for forming a first fiber body S1 in which a first raw material M1A and a second raw material M1B are mixed. Thereby, the fiber body manufacturing apparatus 100 capable of manufacturing the first fiber body S1 having a length average fiber length equal to or more than the length average fiber length of the first fiber group contained in the first raw material M1A is provided. can.

11 ... Raw material supply section, 11A ... 1st supply section, 11B ... 2nd supply section, 12 ... coarse crushing section, 13 ... defibration section, 14 ... sorting section, 15 ... first web forming section, 16 ... subdivision section, 17 ... Mixing part, 18 ... Unraveling part, 19 ... Second web forming part, 20 ... Sheet forming part, 21 ... Cutting part, 22 ... Stock part, 27 ... Recovery part, 100 ... Fiber body manufacturing equipment, M1A ... First Raw material, M1B ... second raw material, P1 ... binder, S1 ... first fiber.

Claims (11)

The first supply step of supplying the first raw material including the first fiber group, and
A second supply step of supplying a second raw material containing a second fiber group having a longer average length fiber length as compared with the average length fiber length of the first fiber group, and a second supply step.
Including a forming step of forming a first fiber body containing the first raw material and the second raw material.
The average length of the first fiber body is equal to or greater than the average length of the first fiber group.
A fiber body manufacturing method characterized by. The forming step includes a binding step of binding the first fiber contained in the first fiber group and the second fiber contained in the second fiber group.
The binding step is
A binder material supply step for supplying a binder material for binding the first fiber and the second fiber, and
A heating step of binding the first fiber and the second fiber with the binder, and
To include,
The fiber body manufacturing method according to claim 1. The second raw material contains a binder that binds the first fiber contained in the first fiber group and the second fiber contained in the second fiber group.
The forming step includes a binding step of binding the first fiber and the second fiber.
The binding step includes a heating step of binding the first fiber and the second fiber with the binding material.
The fiber body manufacturing method according to claim 1. The number average fiber length of the second fiber group is longer than the number average fiber length of the first fiber group.
The fiber body manufacturing method according to any one of claims 1 to 3, wherein the fibrous body is produced. Including a defibration step of defibrating the first raw material,
The fiber body manufacturing method according to any one of claims 1 to 4, wherein the fibrous body is produced. Including a defibration step of defibrating the first raw material and the second raw material.
The fiber body manufacturing method according to any one of claims 1 to 4, wherein the fibrous body is produced. The first raw material, or the first raw material and the second raw material are in the form of a sheet.
A coarse crushing step of coarsely crushing the first raw material, or the first raw material and the second raw material is included upstream of the defibration step.
The fiber body manufacturing method according to claim 6. The first raw material contains the binder and contains.
The mass ratio of the binder of the second raw material is larger than the mass ratio of the binder of the first raw material.
The fiber body manufacturing method according to claim 3. The first raw material contains the binder and contains.
The mass ratio of the binder of the second raw material is smaller than the mass ratio of the binder of the first raw material.
The fiber body manufacturing method according to claim 3. A fiber body manufacturing method for manufacturing a second fiber body using the first fiber body manufactured according to claim 1.
A third supply step of supplying the first fiber body as a third raw material, and
The fourth supply step of supplying the fourth raw material including the fourth fiber group having a longer average length fiber length as compared with the length average fiber length of the third fiber group contained in the first fiber body, and the fourth supply step.
The defibration step of defibrating the first fiber body and
It includes a forming step of forming a second fiber body containing the first fiber body defibrated in the defibration step and the fourth raw material.
The average length of the second fiber is equal to or greater than the average length of the first fiber.
A fiber body manufacturing method characterized by. The first supply unit that supplies the first raw material including the first fiber group,
A second supply unit for supplying a second raw material containing a second fiber group having a longer average length fiber length as compared with the average length fiber length of the first fiber group.
A forming portion for forming a first fiber body including the first raw material and the second raw material is provided.
The average length of the first fiber body is equal to or greater than the average length of the first fiber group.
A fiber body manufacturing device characterized by.

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