JP2020084396A - Defibration apparatus, regeneration apparatus and defibration method - Google Patents

Abstract

To provide a defibration apparatus, a regeneration apparatus and a defibration method, capable of producing a high-quality sheet.SOLUTION: A defibration apparatus comprises a feed part 132 for feeding a material containing fiber and a resin having a glass transition temperature of 25°C or less, in a state with the resin attached to the fiber, a defibration part 131 for defibrating the material fed from the feed part, a discharge part 133 for discharging a defibrated product M3 defibrated by the difibration part 131, and a cooling part 5 for cooling such that the temperature of the defibrated product M3 discharged from the discharge part 133 is controlled to less than 25°C.SELECTED DRAWING: Figure 2

Description

The present invention relates to a defibrating device, a regeneration processing device, and a defibrating method.

In recent years, for example, as disclosed in Patent Document 1, there is known a recycling apparatus that recycles not only paper as a raw material but also a raw material other than paper such as a dry pulp nonwoven fabric.

The regenerating apparatus disclosed in Patent Document 1 is one in which a coarse disintegrated material of a dry pulp non-woven fabric is mixed with a pulp for papermaking in a state of coarsely disaggregated fiber lumps, and paper is made by an ordinary wet paper machine. ..

Such a wet type sheet manufacturing apparatus requires a large amount of water, and the apparatus becomes large. Furthermore, maintenance of the water treatment facility is time-consuming, and the energy required for the drying process is large.

Therefore, in order to reduce the size and save energy, it is possible to apply a dry method that does not use water as much as possible.

JP-A-8-127998

However, when the dry pulp nonwoven fabric is defibrated by the dry method, the temperature of the defibrated dry pulp nonwoven fabric increases. Due to this temperature rise, the viscosity of the adhesive resin contained in the dry pulp non-woven fabric is lowered, and the resin binds the fibers to each other to form a lump, which can be stably supplied to the subsequent process. Becomes difficult. As described above, it is difficult to dry and defib a raw material containing a resin having an adhesive property, such as a dry pulp nonwoven fabric, and to regenerate it.

The present invention has been made to solve the above problems, and can be realized as the following.

The defibration apparatus of the present invention includes a fiber and a resin having a glass transition temperature of 25° C. or less, and a supply unit that supplies a material in a state in which the resin is attached to the fiber,
A defibration unit for defibrating the material supplied from the supply unit,
A discharging section for discharging the defibrated material defibrated by the defibrating section,
And a cooling unit that cools the defibrated material discharged from the discharging unit to a temperature of less than 25°C.

The defibration apparatus of the present invention includes a fiber and a resin having a glass transition temperature of 25° C. or lower, and a first material in a state where the resin is attached to the fiber, and a second material that inhibits the binding property of the resin. A supply unit for supplying
A defibration device, comprising: a defibration unit that defibrates the first material in a state where the first material and the second material supplied from the supply unit are mixed.

A regeneration processing device of the present invention is a defibration device of the present invention,
And a stacking unit configured to stack the defibrated material defibrated by the defibrating device to form a web.

The defibration method of the present invention comprises a step of supplying a material containing a fiber and a resin having a glass transition temperature of 25° C. or lower, and a material in a state in which the resin is attached to the fiber together with air,
A step of defibrating the supplied material,
A step of discharging the defibrated defibrated material,
In the step of defibrating the material, defibration is performed while cooling so that the temperature of the defibrated material discharged is less than 25°C.

The defibration method of the present invention includes a fiber and a resin having a glass transition temperature of 25° C. or lower, and a first material in a state where the resin is attached to the fiber, and a second material that inhibits the binding property of the resin. And the process of supplying from
And a step of defibrating the first material in a state of mixing the supplied first material and the second material.

FIG. 1 is a schematic side view showing a sheet manufacturing apparatus provided with a first embodiment of a recycling apparatus of the present invention. FIG. 2 is a sectional view showing a first embodiment of the defibrating device of the present invention. FIG. 3 is an enlarged schematic diagram showing the state of the raw material before and after being defibrated by the defibration device shown in FIG. 2. FIG. 4 is a sectional view showing a second embodiment of the defibrating device of the present invention. FIG. 5: is sectional drawing which shows 3rd Embodiment of the disentanglement apparatus of this invention. FIG. 6 is a sectional view showing a fourth embodiment of the defibrating device of the present invention. FIG. 7: is sectional drawing which shows 5th Embodiment of the disentanglement apparatus of this invention. FIG. 8 is an enlarged schematic view showing the state of the raw material before and after being defibrated by the defibration device shown in FIG. 7. FIG. 9 is an enlarged schematic diagram showing the state of the raw material before and after being defibrated by the defibrating apparatus according to the sixth embodiment of the present invention. FIG. 10: is an expanded schematic diagram which shows the state of the raw material before and after being disentangled with the conventional disentanglement apparatus.

Hereinafter, a defibration apparatus, a reprocessing apparatus, and a defibration method of the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.

<First Embodiment>
FIG. 1 is a schematic side view showing a sheet manufacturing apparatus provided with a first embodiment of a recycling apparatus of the present invention. FIG. 2 is a sectional view showing a first embodiment of the defibrating device of the present invention. FIG. 3 is an enlarged schematic diagram showing the state of the raw material before and after being defibrated by the defibration device shown in FIG. 2. FIG. 10: is an expanded schematic diagram which shows the state of the raw material before and after being disentangled with the conventional disentanglement apparatus.

Note that, for convenience of description, three axes orthogonal to each other will be referred to as an x-axis, a y-axis, and a z-axis, as shown in FIG. 1 below. The xy plane including the x-axis and the y-axis is horizontal, and the z-axis is vertical. In addition, the direction in which the arrow of each axis faces is referred to as "+", and the opposite direction is referred to as "-". Further, the upper side of FIGS. 1 and 2 is referred to as “upper” or “upper”, and the lower side is referred to as “lower” or “lower”. Further, the x-axis-side in FIG. 1 is referred to as "upstream side", and the x-axis + side is referred to as "downstream side".

As shown in FIGS. 1 and 2, the sheet manufacturing apparatus 100 includes a reprocessing apparatus 10, a sheet forming unit 20, a cutting unit 21, a stock unit 22, and a collecting unit 27. Further, the reprocessing apparatus 10 includes a raw material supply unit 11, a crushing unit 12, a defibrating device 13, a sorting unit 14, a first web forming unit 15, a subdivision unit 16, a mixing unit 17, and a loosening unit. The unit 18, the second web forming unit 19, and the control unit 28 are provided. Of these, the raw material supply unit 11, the crushing unit 12, and the defibrating device 13 are installed on the upstream side.

Further, as shown in FIGS. 1 and 2, the sheet manufacturing apparatus 100 includes a humidifying section 231, a humidifying section 232, a humidifying section 233, a humidifying section 234, a humidifying section 235, and a humidifying section 236. There is. In addition, the sheet manufacturing apparatus 100 includes a blower 173, a blower 261, a blower 262, and a blower 263.

Further, in the sheet manufacturing apparatus 100, a raw material supplying step, a crushing step, a defibrating step, a selecting step, a first web forming step, a dividing step, a mixing step, a loosening step, and a second web. The forming step, the sheet forming step, and the cutting step are performed in this order.

The configuration of each part will be described below.
As shown in FIG. 1, the raw material supply unit 11 is a part that performs a raw material supply step of supplying the raw material M1 to the crushing unit 12. The raw material M1 is a sheet-shaped material made of a material 50 containing fibers 30 and an adhesive 40 that bonds the fibers 30 to each other, that is, a chemical bond nonwoven fabric. FIG. 3 shows a raw material (coarse crushed piece) M2 in a state where the sheet-like chemically bonded nonwoven fabric is crushed in the crushing section 12 and a state in which the crushed piece M2 is defibrated by an arrow α.

Examples of the fiber 30 include natural fiber, regenerated fiber, and synthetic fiber. The hydrophilic fibers may be used alone or in combination of two or more.

Examples of natural fibers include natural cellulose fibers such as cotton, hemp, wool and pulp. Regenerated fibers include regenerated cellulose fibers such as rayon and cupra. Examples of the synthetic fiber include a synthetic fiber made of a thermoplastic resin having at least one of a hydrophilic functional group such as a hydroxyl group, a carboxyl group and a sulfonic acid group and a hydrophilic bond such as an amide bond.

The content of the fibers 30 in the material 50 is not particularly limited and is, for example, preferably 50% by mass or more and 95% by mass or less, and more preferably 70% by mass or more and 85% by mass or less.

Examples of the adhesive 40 include a hot-melt adhesive containing a resin having a glass transition temperature of room temperature or lower, that is, 25° C. or lower. Examples thereof include polyacrylic acid resin, polyacrylic acid ester resin, low-density polyethylene resin, and ethylene acetic acid. Examples thereof include vinyl resin, synthetic rubber, copolyamide resin and copolyester resin.

An adhesive 40 is spread and attached to the fibers 30, and the fibers 30 are bound by the adhesive 40.

The content of the adhesive 40 in the material 50 is not particularly limited and is, for example, preferably 5% by mass or more and 40% by mass or less, and more preferably 10% by mass or more and 30% by mass or less.

The crushing unit 12 is a part that performs a crushing step of crushing the raw material M1 supplied from the raw material supply unit 11 in the air such as the atmosphere. The crushing section 12 has a pair of crushing blades 121 and a chute 122.

By rotating the pair of coarsely crushing blades 121 in opposite directions, the raw material M1 can be coarsely crushed between them, that is, cut into coarsely crushed pieces M2. The shape and size of the coarsely crushed pieces M2 are preferably suitable for the defibration process in the defibration device 13, for example, small pieces having a side length of 100 mm or less are preferable, and 10 mm or more and 70 mm or less. More preferably, it is a small piece.

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

Further, a humidifying section 231 is arranged above the chute 122 so as to be adjacent to the pair of coarse crushing blades 121. The humidifying part 231 humidifies the coarsely crushed pieces M2 in the chute 122. The humidifying section 231 may be of a vaporization type, an ultrasonic type, or a heating type. By supplying the humidified air to the coarsely crushed pieces M2, it is possible to prevent the coarsely crushed pieces M2 from adhering to the chute 122 or the like due to static electricity.

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

The defibration device 13 has a rotary blade 134 that rotates at high speed, and is a part that performs a defibration process step of defibrating the coarsely crushed pieces M2 in the air, that is, in a dry manner. By the defibration process by the defibration device 13, the defibrated material M3 can be generated from the coarsely crushed pieces M2. Here, “to disintegrate” means to disintegrate most of the coarsely crushed pieces M2 formed by binding a plurality of fibers 30 into individual pieces. Then, the loosened material becomes the defibrated material M3. The defibrated material M3 has a linear shape or a band shape. The configuration of the defibrating device 13 will be described in detail later.

The defibrating device 13 can generate a flow of air from the crushing unit 12 toward the sorting unit 14, that is, an airflow, by rotating the rotary blade 134. Thereby, the coarsely crushed pieces M2 can be sucked from the tube 241 to the defibrating device 13. Further, after the defibration process, the defibrated material M3 can be sent to the sorting unit 14 via the tube 242.

A blower 261 is installed in the middle of the tube 242. The blower 261 is an airflow generation device that generates an airflow toward the selection unit 14. As a result, the delivery of the defibrated material M3 to the sorting unit 14 is promoted.

The sorting unit 14 is a portion that performs a sorting step of sorting the defibrated material M3 according to the size of the fiber length. In the sorting part 14, the defibrated material M3 is sorted into a first sorted material M4-1 and a second sorted material M4-2 larger than the first sorted material M4-1. The first sorted product M4-1 has a size suitable for subsequent production of the sheet S. The average length is preferably 1 μm or more and 30 mm or less. On the other hand, the second sorted matter M4-2 includes, for example, one in which defibration is insufficient, one in which defibrated fibers are excessively aggregated, and the like.

The selection unit 14 includes a drum unit 141 and a housing unit 142 that houses the drum unit 141.

The drum part 141 is a sieve which is composed of a net having a cylindrical shape and rotates around its central axis. The defibrated material M3 flows into the drum portion 141. Then, as the drum part 141 rotates, the defibrated material M3 smaller than the mesh opening is selected as the first selected material M4-1, and the defibrated material M3 having a size larger than the mesh opening is It is sorted as the second sorted product M4-2.

The first sorted matter M4-1 drops from the drum portion 141.
On the other hand, the second sorted matter M4-2 is sent out to the pipe 243 connected to the drum part 141. The pipe 243 is connected to the pipe 241 on the side opposite to the drum part 141, that is, on the downstream side. The second sorted matter M4-2 that has passed through the tube 243 merges with the coarsely crushed pieces M2 in the tube 241, and flows into the defibrating device 13 together with the roughly crushed pieces M2. Thereby, the second sorted matter M4-2 is returned to the defibrating device 13 and defibrated with the coarsely crushed pieces M2.

Further, the first sorted matter M4-1 from the drum portion 141 is dispersed and dropped in the air, and goes toward the first web forming portion 15 located below the drum portion 141. The 1st web formation part 15 is a part which performs the 1st web formation process which forms the 1st web M5 from the 1st selection thing M4-1. The first web forming unit 15 includes a mesh belt 151, three stretching rollers 152, and a suction unit 153.

The mesh belt 151 is an endless belt, and the first sorted matter M4-1 is accumulated. The mesh belt 151 is wound around three stretching rollers 152. Then, by the rotation drive of the stretching roller 152, the first sorted matter M4-1 on the mesh belt 151 is transported to the downstream side.

The first sorted product M4-1 has a size larger than the mesh openings of the mesh belt 151. As a result, the first sorted matter 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 matter M4-1 is conveyed to the downstream side together with the mesh belt 151 while being accumulated on the mesh belt 151, the first sorted matter M4-1 forms a layered form and serves as the first web M5 having a predetermined width in the y-axis direction. It is formed.

In addition, for example, dust or dust may be mixed in the first sorted matter M4-1. Dust or dust may be generated by, for example, coarse crushing or defibration. Then, such dust and dirt will be collected by the collecting unit 27 described later.

The suction unit 153 is a suction mechanism that sucks air from below the mesh belt 151. As a result, the dust and the dust that have passed through the mesh belt 151 can be sucked together with the air.

The suction unit 153 is connected to the collection unit 27 via the pipe 244. The dust sucked by the suction unit 153 is collected by the collection unit 27.

A pipe 245 is further connected to the recovery unit 27. A blower 262 is installed in the middle of the tube 245. By the operation of the blower 262, a suction force can be generated in the suction section 153. This promotes formation of the first web M5 on the mesh belt 151. The first web M5 is the one from which dust and dirt have been removed. Further, dust and dirt pass through the pipe 244 and reach the collection unit 27 by the operation of the blower 262.

The housing section 142 is connected to the humidifying section 232. As a result, humidified air is supplied into the housing portion 142. The humidified air can humidify the first sorted matter M4-1, so that it is possible to suppress the first sorted matter M4-1 from adhering to the inner wall of the housing portion 142 by an electrostatic force.

An independent humidifying section 235 is arranged on the downstream side of the sorting section 14. As a result, water can be supplied to the first web M5, and thus the water content of the first web M5 is adjusted. By this adjustment, it is possible to suppress the attraction of the first web M5 to the mesh belt 151 due to the electrostatic force. Accordingly, the first web M5 is easily separated from the mesh belt 151 at the position where the mesh belt 151 is folded back by the stretching roller 152.

The subdivision section 16 is arranged on the downstream side of the humidifying section 235. The subdivision portion 16 is a portion that performs a dividing step of dividing the first web M5 separated from the mesh belt 151. The subdivision portion 16 has a propeller 161 rotatably supported, and a housing portion 162 that houses the propeller 161. Then, the rotating propeller 161 can divide the first web M5. The divided first web M5 becomes a subdivided body M6. Further, the subdivision body M6 descends in the housing portion 162.

The housing part 162 is connected to the humidifying part 233. As a result, humidified air is supplied into the housing portion 162. The humidified air can also prevent the subdivided body M6 from adhering to the inner walls of the propeller 161 and the housing portion 162 by electrostatic force.

A mixing unit 17 is arranged on the downstream side of the subdivision unit 16. The mixing part 17 is a part that performs a mixing step of mixing the subdivided body M6 and the resin P1. The mixing unit 17 has a resin 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 body M6 and the resin P1 passes on the +z axis side.

A molding resin supply unit 171 is connected in the middle of the pipe 172. The molding resin supply unit 171 has a screw feeder 174 extending in the x-axis direction. By rotating the screw feeder 174, the molding resin P1 can be supplied to the pipe 172 as powder or particles. The molding resin P1 supplied to the pipe 172 is mixed with the subdivided body M6 to form the mixture M7.

The molding resin P1 is used to bind the fibers to each other in a later step. For example, a thermoplastic resin or a curable resin can be used, but it is preferable to use the 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, polyethylene. Polyester such as terephthalate, polybutylene terephthalate, nylon 6, nylon 46, nylon 66, nylon 610, nylon 612, nylon 11, nylon 12, nylon 6-12, polyamide such as 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, polyolefin-based, polyvinyl chloride-based, polyurethane-based, polyester-based, polyamide-based, Examples thereof include various thermoplastic elastomers such as polybutadiene-based, trans-polyisoprene-based, fluororubber-based, chlorinated polyethylene-based, and the like, and one or more selected from these may be used in combination. Preferably, the thermoplastic resin is polyester or one containing the same.

In addition to the molding resin P1, for example, a colorant for coloring the fibers, an aggregation inhibitor for suppressing the aggregation of the fibers or the aggregation of the resin P1, may be supplied from the resin supply unit 171. A flame retardant for making fibers and the like less likely to burn, a paper strength enhancer for increasing the paper strength of the sheet S, and the like may be included. Alternatively, the resin P1 may be mixed in advance to be composited and supplied from the molding resin supply unit 171.

A blower 173 is installed in the middle of the pipe 172, downstream of the resin supply unit 171. The subdivided body M6 and the resin P1 are mixed by the action of the rotating part such as the blade of the blower 173. Further, the blower 173 can generate an airflow toward the loosening portion 18. By this air flow, the subdivided body M6 and the resin P1 can be stirred in the pipe 172. As a result, the mixture M7 can flow into the loosening portion 18 in a state where the subdivided bodies M6 and the molding resin P1 are uniformly dispersed. Further, the subdivided body M6 in the mixture M7 is loosened in the process of passing through the tube 172, and becomes finer fibrous.

The disentanglement part 18 is a part which performs the disentanglement process which disentangles the mutually entangled fibers in the mixture M7. The loosening unit 18 includes a drum unit 181 and a housing unit 182 that houses the drum unit 181.

The drum portion 181 is a sieve that is composed of a mesh body having a cylindrical shape and rotates around its central axis. The mixture M7 flows into the drum portion 181. Then, as the drum portion 181 rotates, fibers or the like in the mixture M7 that are smaller than the mesh openings can pass through the drum portion 181. At that time, the mixture M7 is loosened.

The housing section 182 is connected to the humidifying section 234. 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.

Further, the mixture M7 loosened in the drum portion 181 is dispersed and dropped in the air and heads for the second web forming portion 19 located below the drum portion 181. The 2nd web formation part 19 is a part which performs the 2nd web formation process which forms the 2nd web M8 from the mixture M7. The second web forming unit 19 has a mesh belt 191, a tension roller 192, and a suction unit 193.

The mesh belt 191 is an endless belt, and the mixture M7 is accumulated. The mesh belt 191 is wound around four stretching rollers 192. The mixture M7 on the mesh belt 191 is conveyed to the downstream side by the rotation drive of the stretching roller 192.

Most of the mixture M7 on the mesh belt 191 has a size equal to or larger than the mesh opening of the mesh belt 191. As a result, the mixture M7 is restricted from passing through the mesh belt 191, and thus can be deposited on the mesh belt 191. In addition, the mixture M7 is conveyed to the downstream side together with the mesh belt 191 while being accumulated on the mesh belt 191, and thus is formed as a second web M8 having a layered shape and having a predetermined width in the y-axis direction.

The suction unit 193 is a suction mechanism that sucks air from below the mesh belt 191. As a result, the mixture M7 can be sucked onto the mesh belt 191, so that the accumulation of the mixture M7 on the mesh belt 191 is promoted.

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

A humidifying section 236 is arranged on the downstream side of the loosening section 18. 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 attraction of the second web M8 to the mesh belt 191 due to the electrostatic force. As a result, the second web M8 is easily separated from the mesh belt 191 at the position where the mesh belt 191 is folded back by the tension roller 192.

The total amount of water added to the humidifying section 231 to the humidifying section 236 is preferably, for example, 0.5 parts by mass or more and 10 parts by mass or less with respect to 100 parts by mass of the material before humidification.

The sheet forming unit 20 is arranged on the downstream side of the second web forming unit 19. The sheet forming portion 20 is a portion that performs a sheet forming step of forming the sheet S from the second web M8. The sheet forming unit 20 includes a pressure unit 201 and a heating unit 202.

The pressing unit 201 has a pair of rollers 203, and can press the second web M8 between the rollers 203 without heating. As a result, the density of the second web M8 is increased. The degree of heating at this time is, for example, preferably such that the resin P1 is not melted. Then, the second web M8 is conveyed toward the heating unit 202. It should be noted that one of the pair of calendar rollers 203 is a driving roller driven by the operation of a motor (not shown), and the other is a driven roller.

The heating unit 202 has a pair of heating rollers 204, and can press the second web M8 while heating the second web M8 between the heating rollers 204. By this heating and pressing, the resin P1 is melted in the second web M8, and the fibers are bound to each other via the melted resin P1. As a result, the sheet S is formed. Then, the sheet S is conveyed toward the cutting section 21. In addition, one of the pair of heating rollers 204 is a main driving roller driven by the operation of a motor (not shown), and the other is a driven roller.

A cutting unit 21 is arranged on the downstream side of the sheet forming unit 20. The cutting part 21 is a part that performs a cutting step of cutting the sheet S. By cutting, a sheet S having a desired shape and size is obtained. Then, the sheet S is conveyed further downstream and accumulated in the stock section 22.

Each unit included in such a sheet manufacturing apparatus 100 is electrically connected to the control unit 28. The operation of each of these parts is controlled by the controller 28.

The control unit 28 has a CPU (Central Processing Unit) 281 and a storage unit 282. The CPU 281 can make various judgments and various commands, for example.

The storage unit 282 stores, for example, various programs such as a program for manufacturing the sheet S, various calibration curves, and tables.

The control unit 28 may be built in the sheet manufacturing apparatus 100 or may be provided in an external device such as an external computer. In addition, the external device communicates with the sheet manufacturing apparatus 100 via a cable or the like, wirelessly communicates, or a network such as the Internet is connected via the sheet manufacturing apparatus 100, for example. There is.

Further, the CPU 281 and the storage unit 282 may be integrated and configured as one unit, for example, or the CPU 281 may be built in the sheet manufacturing apparatus 100 and the storage unit 282 may be an external computer or the like. It may be provided in the device, or the storage unit 282 may be built in the sheet manufacturing apparatus 100 and the CPU 281 may be provided in an external device such as an external computer.

Next, the defibrating device 13 will be described in detail.
As shown in FIG. 2, the defibration device 13 is a part that performs a defibration process step, and includes a defibration unit 131, a supply unit 132 that is a port that supplies the coarsely crushed pieces M2, and a defibration unit 131. The cooling unit 5 has a discharging unit 133 that is a port for discharging the defibrated material M3.

The defibration process step includes a step of supplying the coarsely crushed pieces M2, that is, the material 50, a step of defibrating the supplied material 50 by the rotary blade 134, and a step of discharging the defibrated defibrated material M3. have. The step of supplying the material 50 is performed by the supply unit 132, the step of defibrating the material 50 is performed by the defibrating unit 131, and the step of discharging the defibrated material M3 is performed by the discharging unit 133.

The defibrating unit 131 includes a plurality of rotary blades 134 that rotate at high speed, a shaft 135 that concentrically supports the rotary blades 134, a housing 136 that houses the rotary blades 134 and the shaft 135, and a shaft that is rotatably supported. A pair of bearings 137 and a rotary drive source 138 connected to one end of the shaft 135.

In the defibrating unit 131, one rotary blade 134 has, for example, a plurality of blades radially arranged with respect to the shaft 135, and the plurality of rotary blades 134 are arranged along the axial direction of the shaft. On the inner wall of the defibrating unit 131 of the housing 136, a protruding fixed blade (not shown) is provided on a part or the entire circumferential surface. Therefore, the material supplied between the rotary blade 134 and the fixed tooth enters and is disentangled by the shearing force generated at that time. Further, the shaft 135 is rotatably supported by a pair of bearings 137 that are installed to face the wall of the housing 136.

The end of the shaft 135 on the left side in FIG. 4 is provided so as to project to the outside of the housing 136, and the projecting portion is connected to the rotary drive source 138. The rotary drive source 138 has a motor driver, a transmission, etc., which are not shown. The motor driver is electrically connected to the control unit 28 shown in FIG. 1 and a power source (not shown), and its operation is controlled according to a program set by the control unit 28 by energization from the power source.

The rotational force of the rotary drive source 138 is transmitted to the shaft 135, and the rotary blades 134 rotate in the same direction together with the shaft 135. As a result, an airflow, particularly a swirling flow, is generated in the housing 136, and the coarsely crushed pieces M2 supplied from the supply unit 132 are transferred to the right side in FIG. Further, during this transfer, the coarsely crushed pieces M2, that is, the material 50 may come into contact with the rotating blade 134 that rotates at a high speed, or may be sandwiched between the rotating blade 134 and the inner wall surface of the housing 136 or the fixed blade, The coarsely crushed pieces M2 are defibrated to become defibrated material M3. Then, the defibrated material M3 rides on the swirl flow and is discharged to the outside from the discharge portion 133.

Here, as described above, the raw material M1 supplied to the sheet manufacturing apparatus 100 is, as shown in FIG. 10, a hot melt adhesive containing fibers 30 and a resin having a glass transition temperature of room temperature or lower, that is, 25° C. or lower. The adhesive 40, which is an agent, is included. An adhesive 40 is spread and attached to the fibers 30, and the fibers 30 are bound by the adhesive 40.

When the coarsely crushed pieces M2 obtained by roughly crushing such a raw material M1 are defibrated, the temperatures of the fibers 30 and the adhesive 40 rise during the defibration. This is due to friction between the rotary blade 134 and the inner wall of the housing 136, heat of the rotary drive source 138 being transferred into the housing 136 via the shaft 135, and the like.

When the temperature of the adhesive 40 rises, the adhesiveness increases, and the fibers 30 become entangled with each other as shown by the arrow in the defibrated state in FIG. As a result, even when trying to defibrate the fibers 30, it becomes difficult to loosen them one by one, and the fibers 30 in the defibrated material M3 are re-bonded to each other, and a so-called “damage” occurs. .. If the second web M8 is formed in this state and formed into the sheet S, the supply becomes unstable, or the sheet is conveyed as a lump, and uneven thickness is conspicuous, and the quality of the sheet S is deteriorated. In FIG. 10, α indicates defibration.

Therefore, in order to solve such a problem, in the defibrating device 13 of the present invention, the defibrating material M3 discharged from the discharging portion 133 is defibrated while being cooled by the cooling portion 5 such that the temperature of the defibrated material M3 is less than 25°C. It is configured to perform. The cooling unit 5 will be described below.

The cooling unit 5 is provided outside the housing 136 and includes a housing cooling unit 5A that cools the housing 136. The housing cooling unit 5A is connected to the cooling chamber 51 provided outside the housing 136 so as to cover the outer peripheral portion of the housing 136 and the cooling chamber 51 so as to communicate with the cooling chamber 51. A coolant supply unit 52 that is a supply port and a coolant discharge unit 53 that is a port that is provided at a position different from the coolant supply unit 52 of the cooling chamber 51 and discharges the coolant R in the cooling chamber 51 are provided. There is.

The cooling chamber 51 is provided so as to cover the side wall 139 of the outer peripheral portion of the housing 136 other than the surface on which the bearing 137 is installed. Since the inner surface of the side wall 139 is in contact with or close to the defibrated material M3, the defibrated material M3 can be cooled more directly by the configuration of covering the side wall 139.

The coolant supply unit 52 is connected to a coolant supply source (not shown), and supplies the coolant R in a state of being cooled to 0° C. or higher and 20° C. or lower into the cooling chamber 51, for example. The refrigerant R is not particularly limited, and examples thereof include liquids such as water, air, nitrogen gas, expectations for alternative CFC gas, and the like. When the refrigerant R is tin, it constitutes a water jacket.

Then, the supplied refrigerant R is discharged from the refrigerant discharge part 53 while circulating in the cooling chamber 51 and absorbing the heat in the housing 136 via the side wall 139 of the housing 136. The coolant supply unit 52 and the coolant discharge unit 53 are provided on the opposite sides of the housing 136. As a result, the circulation path of the refrigerant R can be made sufficiently long, and the refrigerant R can evenly absorb the heat of the housing 136.

In addition, in order to increase the heat dissipation area, a heat sink such as a heat dissipation fin or a labyrinth may be installed on the outer surface of the side wall 139. Further, instead of the cooling chamber 51, a spiral tube may be wound around the outer circumference of the housing 136, and the refrigerant R may flow in the tube.

In the defibration device 13, defibration is performed while the defibration unit 131 is cooled by such a cooling unit 5. In the present invention, cooling is performed so that the temperature of the defibrated material M3 discharged from the discharging unit 133 is lower than 25°C. As a result, the adhesive 40 of the defibrated material M3 being defibrated is defibrated at a temperature lower than its own glass transition temperature. Therefore, as shown in FIG. 10, it is possible to prevent the viscosity of the adhesive 40 from becoming low and to prevent the fibers 30 from being entangled with each other. That is, as shown in FIG. 3, defibration can be performed satisfactorily, and in the subsequent step, the fibers 30 to which the adhesive 40 is attached and the fibers 30 to which the adhesive 40 is not attached are separated. be able to. As a result, it is possible to prevent lumps from occurring in the defibrated material M3, prevent uneven thickness from occurring in the second web M8, and, as a result, the second web M8 having a uniform thickness as much as possible. It is possible to manufacture the sheet S whose thickness is as uniform as possible.

Cooling so that the temperature of the defibrated material M3 discharged from the discharging portion 133 is lower than 25° C. can be realized by setting the temperature of the refrigerant R by the following method.

As this method, for example, a temperature sensor (not shown) is provided in the discharge part 133, the detected temperature is regarded as the temperature of the defibrated material M3, and the temperature of the refrigerant R is adjusted, or the operating condition of the defibrated part 131. And a method of determining the temperature of the refrigerant R based on the calibration curve or the multidimensional table showing the relationship between the temperature of the refrigerant R and the temperature of the defibrated material M3 experimentally.

It is preferable that the coolant supply unit 52 and the coolant discharge unit 53 are connected by a circulation circuit (not shown), and a heat exchange unit for adjusting the temperature of the coolant R is provided in the middle of the circulation circuit. As a result, it is possible to suppress an increase in the amount of the refrigerant R used. Further, it is possible to omit the separate installation of the storage part for storing the refrigerant R. Therefore, it contributes to downsizing and simplification of the device.

As described above, the defibrating device 13 includes the fiber 30 and the resin 20 having a glass transition temperature of 25° C. or less, and the supply unit 132 that supplies the material 50 in the state in which the resin 20 is attached to the fiber 30; A defibrating unit 131 for defibrating the material 50 supplied from the supplying unit 132, a discharging unit 133 for discharging the defibrated material M3 defibrated by the defibrating unit 131, and a defibrated material discharged from the discharging unit 133. And a cooling unit 5 that cools the M3 to a temperature of less than 25°C.

Further, the defibration method executed by the defibration device 13 includes a step of supplying the material 50 including the fibers 30 and the resin 20 having a glass transition temperature of 25° C. or lower, and the resin 50 attached to the fibers 30 together with air. And a step of defibrating the supplied material 50 and a step of discharging the defibrated defibrated material M3. Then, in the step of defibrating the material 50, defibration is performed while cooling the discharged defibrated material M3 so as to be less than 25°C.

According to the present invention as described above, the adhesive 40 of the defibrated material M3 being defibrated can be defibrated at a temperature lower than its glass transition temperature. Therefore, as shown in FIG. 10, it is possible to prevent the viscosity of the adhesive 40 from becoming low and to prevent the fibers 30 from being entangled with each other. That is, as shown in FIG. 3, defibration can be performed satisfactorily, and in the subsequent step, the fibers 30 to which the adhesive 40 is attached and the fibers 30 to which the adhesive 40 is not attached are separated. be able to. As a result, it is possible to prevent lumps from occurring in the defibrated material M3, prevent uneven thickness from occurring in the second web M8, and, as a result, the second web M8 having a uniform thickness as much as possible. It is possible to manufacture the sheet S whose thickness is as uniform as possible.

Further, the cooling unit 5 has a casing cooling unit 5</b>A that is provided outside the casing 136 that houses the rotary blades 134 and that cools the casing 136. This is a configuration for cooling 131. By cooling from around the defibrating unit 131 in this way, it is possible to prevent heat from the outside from being transferred to the defibrating unit 131. Therefore, cooling can be performed more reliably. In addition, it is easy to control the cooling temperature.

Further, the recycling apparatus 10 includes a defibrating device 13, a second web forming unit 19 that is a deposition unit that deposits the defibrated material M3 defibrated by the defibrating device 13 to form a second web M8, Equipped with. As a result, it is possible to manufacture the second web M8 having a thickness as uniform as possible while enjoying the advantages of the defibrating device 13 described above.

<Second Embodiment>
FIG. 4 is a sectional view showing a second embodiment of the defibrating device of the present invention.

Hereinafter, a second embodiment of the defibrating device, the regeneration processing device, and the defibrating method of the present invention will be described with reference to this figure, but the description will focus on the differences from the above-described embodiment, and the same matters will be described. The description is omitted.
This embodiment is the same as the first embodiment except that the configuration of the cooling unit is different.

As shown in FIG. 4, the housing cooling unit 5A includes a cooling element 54 and a heat dissipation block 55. Further, for the cooling element 54, for example, a thermoelectric element such as a Peltier element can be used, and heat is transferred to itself by energization to absorb heat, that is, cool the object. In the case cooling unit 5A, the heat absorbing sides of the plurality of cooling elements 54 are provided in contact with the side wall 139 of the case 136.

The heat dissipation block 55 is provided so as to cover the side wall 139 of the housing 136 together with the cooling element 54. The heat dissipation block 55 has a function of allowing the cooling element 54 to efficiently dissipate the heat on the heat dissipation side to the outside and a function of preventing the heat from the outside from being transferred to the housing 136.

According to such a casing cooling unit 5</b>A, it is possible to prevent heat from the outside from being transferred to the defibrating unit 131 by cooling from around the defibrating unit 131. Therefore, cooling can be performed more reliably, defibration can be performed satisfactorily, and a high-quality sheet S can be obtained. In addition, it is easy to control the cooling temperature. Furthermore, since the cooling element 54 can be installed in any position and in any number, the cooling element 54 can be arranged as desired according to the shape of the housing 136. In addition, it is possible to intensively cool a desired portion.

<Third Embodiment>
FIG. 5: is sectional drawing which shows 3rd Embodiment of the disentanglement apparatus of this invention.

Hereinafter, a third embodiment of a defibrating device, a regeneration processing device, and a defibrating method of the present invention will be described with reference to this drawing, but the description will focus on the differences from the above-described embodiment, and the same matters will be described. The description is omitted.
This embodiment is the same as the first embodiment except that the configuration of the cooling unit is different.

As shown in FIG. 5, the cooling unit 5 includes a cold air supply unit 5B that supplies cold air C to the defibrating unit 131. Thereby, as will be described later, the coarsely crushed pieces M2 can be cooled in advance, and the temperature of the defibrated material M3 discharged from the discharging unit 133 can be set to less than 25°C.

The cold air supply unit 5B includes a cold air supply source 56, a connection unit 57 that connects the cold air supply source 56 and the supply unit 132, and a valve 58 provided in the middle of the connection unit 57.

The cold air supply source 56 can be configured to include, for example, a cold air generation device and an air supply pump, which are not shown. Further, a cylinder filled with cold air C may be used. The cold air supply source 56 can generate the cold air C and supply the cold air C to the supply unit 132 via the connection unit 57. The temperature of the cold air C is not particularly limited, but may be, for example, a temperature at which no dew condensation occurs, but is set to 0° C. or higher and 15° C. or lower.

Further, a valve 58 is provided in the middle of the connecting portion 57, and it is possible to switch between a state in which the cold air C is supplied and a state in which the cold air C is shut off. The valve 58 may be a main valve that is manually opened and closed, or may be an electromagnetic valve that is electrically opened and closed. In the case of an electromagnetic valve, it is preferably electrically connected to the control unit 28 shown in FIG. 1 and its operation is controlled.

The cold air C supplied from the cold air supply source 56 joins the coarsely crushed pieces M2, that is, the material 50 in the supply unit 132, and can cool the coarsely crushed pieces M2 before defibrating. Then, when the cooled coarsely crushed pieces M2 are defibrated, the temperature of the defibrated material M3 will rise to some extent, but the temperature of the defibrated material M3 discharged from the discharge part 133 will be less than 25° C. in advance. By cooling, the adhesive 40 of the defibrated material M3 being defibrated can be defibrated at a temperature lower than its glass transition temperature. As a result, it is possible to prevent lumps from occurring in the defibrated material M3, prevent uneven thickness from occurring in the second web M8, and, as a result, the second web M8 having a uniform thickness as much as possible. It is possible to manufacture the sheet S whose thickness is as uniform as possible.

Although air is used as the cold air C, it may be a gas having another composition or a mixed gas with air.

Further, in the present embodiment, the cool air C is supplied to the supply unit 132, but the present invention is not limited to this, and may be directly supplied to the defibration unit 131, for example.

Further, a configuration may be adopted in which a recovery unit (not shown) that recovers the cool air C is provided and the recovered gas is reused.

<Fourth Embodiment>
FIG. 6 is a sectional view showing a fourth embodiment of the defibrating device of the present invention.

Hereinafter, a fourth embodiment of the defibrating device, the regeneration processing device, and the defibrating method of the present invention will be described with reference to this figure, but the description will focus on the differences from the above-described embodiment, and the same matters will be described. The description is omitted.
This embodiment is the same as the third embodiment except that the configuration of the cooling unit is different.

As shown in FIG. 6, the cooling unit 5 includes a dry ice supply unit 5C that supplies dry ice D to the defibrating unit 131. Thereby, as will be described later, the coarsely crushed pieces M2 can be cooled in advance, and the temperature of the defibrated material M3 discharged from the discharge part 133 can be kept below 25°C. Dry ice D is a kind of sublimation type coolant.

The dry ice supply unit 5C includes a storage unit 59 that stores the granular dry ice D, a connection unit 57 that connects the storage unit 59 and the supply unit 132, and a valve 58 provided in the middle of the connection unit 57. Have.

The dry ice D supplied from the dry ice supply unit 5C merges with the coarsely crushed pieces M2, that is, the material 50 in the supply unit 132, and the coarsely crushed pieces M2 can be cooled before being defibrated. Further, during the defibration, the dry ice D is agitated or crushed and agitated, and the dry ice D can be cooled by contact with the defibrated material M3. Then, against the temperature rise of the defibrated material M3 that accompanies the defibration, the defibrated material M3 discharged from the discharge part 133 is chilled in advance so that the temperature of the defibrated material M3 is less than 25° C. The adhesive 40 of the defibrated material M3 in the process of being defibrated can be defibrated at a temperature lower than its glass transition temperature. As a result, it is possible to prevent lumps from occurring in the defibrated material M3, prevent unevenness in thickness from occurring in the second web M8, and, as a result, the second web M8 having a uniform thickness as much as possible, and It is possible to manufacture the sheet S whose thickness is as uniform as possible.

Further, when dry ice D is used as the coolant, it sublimates into a gas without passing through the liquid due to the heat absorption, and becomes a gas, so that the fibers 30 and the like in the defibrated material M3 can be defibrated without being adversely affected. it can. Furthermore, since almost all of the dry ice D that has passed through the defibrating device 13 is in a vaporized state, the work of collecting the dry ice D can be omitted.

The average particle size of the dry ice D stored in the storage section 59 is preferably 1 μm or more and 200 μm or more, and more preferably 5 μm or more and 100 μm or less. As a result, the particles of the dry ice D can uniformly contact the coarsely crushed pieces M2, that is, the material 50, and the coarsely crushed pieces M2 or the defibrated material M3 can be efficiently defibrated.

Further, the ratio X/Y of the supply amount X of the coarsely crushed pieces M2 supplied to the defibrating unit 131 and the supply amount Y of the dry ice D supplied to the defibrating unit 131 is 1/3 or more and 3 or less. It is preferable that it is 1 or more and 2 or less. Thereby, the coarsely crushed pieces M2 and the defibrated material M3 can be cooled without excess or deficiency.

In the present embodiment, the dry ice D is supplied to the supply unit 132, but the present invention is not limited to this. For example, the dry ice D may be directly supplied to the defibration unit 131.

<Fifth Embodiment>
FIG. 7: is sectional drawing which shows 5th Embodiment of the disentanglement apparatus of this invention. FIG. 8 is an enlarged schematic view showing the state of the raw material before and after being defibrated by the defibration device shown in FIG. 7.

Hereinafter, a fifth embodiment of the defibrating device, the regeneration processing device, and the defibrating method of the present invention will be described with reference to these drawings, but the description will focus on the differences from the above-described embodiment and the same matters Will not be described.
This embodiment is the same as the third embodiment except that the configuration of the cooling unit is different.

As illustrated in FIG. 7, the defibrating device 13 includes an inhibitor supply unit 5D that supplies an inhibitor M9 that is a second material that inhibits the binding property of the adhesive 40. The inhibitor supply unit 5D includes an inhibitor storage unit 51D that stores the inhibitor M9, a connection unit 57 that connects the inhibitor storage unit 51D and the supply unit 132, and a valve 58 provided in the middle of the connection unit 57. Have.

In the present embodiment, the inhibitor M9 is derived from paper containing cellulose fibers, and may be in the form of, for example, a small piece, a cotton shape, a sheet shape, or a granular shape. The cellulose fibers contained in these may be those having a fibrous form containing cellulose as a main component as a main component, and may include hemicellulose and lignin in addition to cellulose. Further, the inhibitor M9 may be, for example, recycled paper produced by disintegrating waste paper to be recycled, CMC powder, or the like.

FIG. 8 shows that the material 50 (coarse crushed pieces M) and the inhibitor M9 are put into the defibrating device 13 in a mixed state, and the material 50 (coarse crushed pieces M) and the inhibitor defibrated as the defibration process proceeds. It is the figure which showed the state process of M9. In FIG. 8, α represents defibration and β represents mixing.

Thus, the inhibitor M9, which is the second material, is solid at 30°C. That is, the glass transition temperature of the inhibitor M9 is higher than the glass transition temperature of the adhesive 40. The coarsely crushed pieces M2 and the inhibitor M9 are defibrated by the defibrating unit 131 to raise the temperature and the viscosity of the adhesive 40 decreases, but as shown in FIG. The resulting inhibitor M9 is mixed with the material 50 and adheres to the surface of the adhesive 40 having a reduced viscosity. As a result, the area where the adhesive 40 having reduced viscosity is exposed on the surface is sufficiently small. Therefore, it is possible to prevent the adhesive 40 having a reduced viscosity from being entangled with the surrounding fibers 30. That is, reattachment of the fiber 30 to the surface of the adhesive 40 is prevented. As a result, as shown in FIG. 8, it is possible to satisfactorily disintegrate, and it is possible to obtain fibers in a state in which each fiber 30 is loosened one by one in the subsequent step and is appropriately disintegrated.

If the inhibitor M9, which is the second material, is derived from paper, even if the inhibitor M9 is transported to the downstream side together with the defibrated material M3 and is mixed with the second web M8, foreign matter is not mixed. Therefore, the work of removing the inhibitor M9 can be omitted, which is advantageous for manufacturing.

The average fiber length of the cellulose fibers is not particularly limited, but is preferably 0.01 mm or more and 10 mm or less, more preferably 0.1 mm or more and 1 mm or less. Thereby, when the inhibitor M9 adheres to the surface of the adhesive 40, the surface can be covered without any gap. Therefore, it is possible to more effectively prevent the occurrence of lumps in the defibrated material M3. Further, even if the adhesive 40 is deformed during defibration and the adhesive is exposed, the exposed portion can be adhered and covered without a gap.

For the same reason, the average fiber width of the cellulose fibers is preferably 5 μm or more and 50 μm or less, and more preferably 7 μm or more and 40 μm or less.

For the same reason, the average aspect ratio of the cellulose fibers, that is, the ratio of the average length to the average width is preferably 3 or more and 600 or less, and more preferably 10 or more and 400 or less.

The ratio A/B of the supply amount A of the material 50 which is the first material supplied from the supply unit 132 per unit time and the supply amount B of the inhibitor M9 which is the second material per unit time is 1/3 or more. It is preferably 3 or less, more preferably 1/2 or more and 2 or less. As a result, the inhibitor M9 can be supplied to the material 50 without excess or deficiency, and the above effect can be more reliably exhibited.

As described above, the defibrating device 13 includes the fiber 30 and the adhesive 40 that is a resin having a glass transition temperature of 25° C. or less, and the material 50 that is the first material in a state in which the adhesive 40 is attached to the fiber 30. , A supply unit 132 that supplies the inhibitor M9 that is the second material that inhibits the binding property of the adhesive 40, and the material 50 that is supplied from the supply unit 132 and the inhibitor M9 are mixed. And a defibrating unit 131 for defibrating.

In addition, the defibration method executed by the defibration device 13 includes the fibers 30 and the adhesive 40 that is a resin having a glass transition temperature of 25° C. or less, and is the first material in a state where the adhesive 40 is attached to the fibers 30. A step of supplying a certain material 50 and an inhibitor M9, which is a second material that inhibits the binding property of the adhesive 40, from the supply unit 132, and the material 50 and the inhibitor M9 in a mixed state. And the step of defibrating 50.

As a result, the inhibitor M9 is mixed with the material 50 and adheres to the surface of the adhesive 40. As a result, the area where the adhesive 40 having reduced viscosity is exposed on the surface is sufficiently small. Therefore, it is possible to prevent the adhesive 40 having a reduced viscosity from being entangled with the surrounding fibers 30. That is, as shown in FIG. 8, it is possible to satisfactorily defibrate, and it is possible to obtain fibers in a state where each fiber 30 is unraveled one by one in the subsequent step and is appropriately defibrated. As a result, it is possible to prevent lumps from occurring in the defibrated material M3, prevent uneven thickness from occurring in the second web M8, and, as a result, the second web M8 having a uniform thickness as much as possible. It is possible to manufacture the sheet S whose thickness is as uniform as possible.

<Sixth Embodiment>
FIG. 9 is an enlarged schematic diagram showing the state of the raw material before and after being defibrated by the defibrating device according to the sixth embodiment of the present invention.

Hereinafter, a sixth embodiment of the defibrating device, the regeneration processing device, and the defibrating method of the present invention will be described with reference to this figure, but the description will focus on the differences from the above-described embodiment, and the same matters will be described. The description is omitted.

This embodiment is the same as the fifth embodiment except that the constituent material of the inhibitor is different.
FIG. 9 shows that the material 50 (coarse fragments M) and the inhibitor M9 are put in the defibrating device 13 in a mixed state, and the material 50 (coarse fragments M) and the inhibitor defibrated as the defibration process proceeds. It is the figure which showed the state process of M9. In FIG. 9, α represents defibration and β represents mixing.

As shown in FIG. 9, the inhibitor M9 is composed of resin particles that are solid at 30° C. The resin particles are not particularly limited as long as the glass transition temperature is 25° C. or higher, and examples thereof include polyolefins such as AS resin, ABS resin, polyethylene, polypropylene, ethylene-vinyl acetate copolymer (EVA), modified polyolefins, Acrylic resin such as polymethylmethacrylate, polyester such as polyvinyl chloride, polystyrene, polyethylene terephthalate, polybutylene terephthalate, nylon 6, nylon 46, nylon 66, nylon 610, nylon 612, nylon 11, nylon 12, nylon 6-12, Polyamide such as nylon 6-66, polyphenylene ether, polyacetal, polyether, polyphenylene oxide, polyetheretherketone, polycarbonate, polyphenylene sulfide, thermoplastic polyimide, polyetherimide, liquid crystal polymer such as aromatic polyester, styrene type, polyolefin type , Polyvinyl chloride-based, polyurethane-based, polyester-based, polyamide-based, polybutadiene-based, trans-polyisoprene-based, fluororubber-based, chlorinated polyethylene-based thermoplastic elastomers, and the like, and one selected from these or Two or more kinds can be used in combination.

As described in the first embodiment, these materials can be used as the resin P1 to be mixed with the defibrated material M3 when the second web M8 is manufactured, and thus the inhibitor M9 is defibrated material. Even if it is transported to the downstream side together with M3 and mixed with the second web M8, no foreign matter is mixed.

The average particle diameter of the resin particles is preferably 1 μm or more and 500 μm or less, and more preferably 3 μm or more and 400 μm or less. Thereby, when the inhibitor M9 adheres to the surface of the adhesive 40, the surface can be covered without any gap. Therefore, it is possible to more effectively prevent the occurrence of lumps in the defibrated material M3. Further, even if the adhesive 40 is deformed during defibration and the adhesive is exposed, the exposed portion can be adhered and covered without a gap.

As the average particle size of the resin particles, for example, a volume average particle size MVD (Mean Volume Diameter) measured by a laser diffraction type particle size distribution measuring device can be used. In a particle size distribution measuring device having a laser diffraction/scattering method as a measurement principle, that is, a laser diffraction type particle size distribution measuring device, the particle size distribution can be measured on a volume basis.

The shape of the resin particles is not particularly limited, and may be granular, acicular, scale-like, or the like.

According to the present embodiment as described above, the same effect as that of the fifth embodiment can be obtained.

Although the defibrating apparatus, the regenerating processing apparatus, and the defibrating method of the present invention have been described above with reference to the illustrated embodiment, the present invention is not limited thereto, and each unit constituting the defibrating apparatus and the regenerating processing apparatus. And each step can be replaced with one having any configuration capable of exhibiting the same function. Further, any constituents or steps may be added.

Further, the defibrating device, the regeneration processing device, and the defibrating method of the present invention may be a combination of any two or more configurations and features of the above-described embodiments.

100... Sheet manufacturing apparatus, 10... Regeneration processing apparatus, 5... Cooling section, 5A... Casing cooling section, 5B... Cold air supply section, 5C... Dry ice supply section, 5D... Inhibitor supply section, 51... Cooling chamber,
51D... Inhibitor storage part, 52... Refrigerant supply part, 53... Refrigerant discharge part, 54... Cooling element, 55... Radiating block, 56... Cold air supply source, 57... Connection part, 58... Valve, 59... Storage part, 11 ... Raw material supply section, 12... Coarse crushing section, 121... Coarse crushing blade, 122... Shoot, 13... Disentanglement apparatus, 131... Disentanglement section, 132... Supply section, 133... Discharge section, 134... Rotating blade, 135... Shaft, 136... Casing, 137... Bearing, 138... Rotational drive source, 139... Side wall, 14... Sorting section, 141... Drum section, 142... Housing section, 15... First web forming section, 151... Mesh belt, 152 ... tension roller, 153... suction part, 16... subdivision part, 161... propeller, 162... housing part, 17... mixing part, 171... resin supply part, 172... pipe, 173... blower, 174... screw feeder, 18... Unraveling part, 181... Drum part, 182... Housing part, 19... Second web forming part, 191... Mesh belt, 192... Stretching roller, 193... Suction part, 20... Sheet forming part, 201... Pressing part, 202 ... heating part, 203... calendar roller, 204... heating roller, 21... cutting part, 211... first cutter, 212... second cutter, 22... stock part, 231... humidifying part, 232... humidifying part, 233... humidifying part 234... Humidifying part, 235... Humidifying part, 236... Humidifying part, 241... Pipe, 242... Pipe, 243... Pipe, 244... Pipe, 245... Pipe, 246... Pipe, 261... Blower, 262... Blower, 263... Blower, 27... Recovery unit, 28... Control unit, 281... CPU, 282... Storage unit, 20... Resin, 30... Fiber, 40... Adhesive, 50... Material, M1... Raw material, M2... Coarse crushed piece, M3... Dissolution Fiber, M4-1... First selection, M4-2... Second selection, M5... First web, M6... Subdivision, M7... Mixture, M8... Second web, M9... Inhibitor, C... Cold air , D... Dry ice, R... Refrigerant, S... Sheet

Claims (11)

A supply unit that includes a fiber and a resin having a glass transition temperature of 25° C. or lower, and that supplies a material in a state where the resin is attached to the fiber,
A defibration unit for defibrating the material supplied from the supply unit,
A discharging section for discharging the defibrated material defibrated by the defibrating section,
A defibrating device comprising: a cooling unit that cools the defibrated material discharged from the discharging unit to a temperature of less than 25° C. The defibrating unit has a rotating rotary blade and a housing that houses the rotary blade,
The defibration device according to claim 1, wherein the cooling unit includes a casing cooling unit that is provided outside the casing and cools the casing. The defibration device according to claim 1, wherein the cooling unit includes a cold air supply unit that supplies cold air to the defibration unit. The defibrating device according to claim 1, wherein the cooling unit includes a dry ice supply unit that supplies dry ice to the defibration unit. A supply unit that includes a fiber and a resin having a glass transition temperature of 25° C. or lower, and that supplies a first material in a state where the resin is attached to the fiber and a second material that inhibits the binding property of the resin;
A defibration device, comprising: a defibration unit that defibrates the first material in a state where the first material and the second material supplied from the supply unit are mixed. The defibration apparatus according to claim 5, wherein the second material is solid at 30°C. The defibration apparatus according to claim 5, wherein the second material is derived from paper. The ratio A/B of the supply amount A of the first material per unit time and the supply amount B of the second material per unit time supplied from the supply unit is 1/3 or more and 3 or less. The defibration apparatus according to any one of 5 to 7. A defibration device according to any one of claims 1 to 8,
And a stacking unit configured to stack the defibrated material defibrated by the defibrating apparatus to form a web. A step of supplying, together with air, a material having fibers and a resin having a glass transition temperature of 25° C. or lower, and the resin having the resin adhered to the fibers;
A step of defibrating the supplied material,
A step of discharging the defibrated defibrated material,
In the step of defibrating the material, defibration is performed while cooling the discharged defibrated material so that the temperature of the defibrated material is less than 25° C. A step of supplying from a first material containing fibers and a resin having a glass transition temperature of 25° C. or lower and having the resin adhered to the fibers, and a second material that inhibits the binding property of the resin;
And a step of defibrating the first material in a state where the supplied first material and the second material are mixed with each other.

Images