WO2009096149A1

WO2009096149A1 - Process for producing continuous coagulated rubber and process for producing sheet-form coagulated rubber

Info

Publication number: WO2009096149A1
Application number: PCT/JP2009/000177
Authority: WO
Inventors: Masanori Yamashita
Original assignee: Daikin Industries, Ltd.
Priority date: 2008-01-29
Filing date: 2009-01-20
Publication date: 2009-08-06
Also published as: JP2009178854A

Abstract

The time period required for forming an uncrosslinked rubber sheet is reduced, and the cost of forming an uncrosslinked rubber sheet is reduced. A process for producing a continuous coagulated rubber is provided which comprises the step of producing a water-containing continuous coagulated rubber and the step of dehydrating the water-containing continuous coagulated rubber. In the step of producing a water-containing continuous coagulated rubber, a rubber latex (RL) is continuously brought into contact with a coagulating liquid (CL) to produce a water-containing continuous coagulated rubber (LC). In the step of dehydrating the water-containing continuous coagulated rubber, the water in the water-containing continuous coagulated rubber is diminished.

Description

Long rubber coagulum manufacturing method and sheet-like rubber coagulum manufacturing method

The present invention relates to a method for producing a long rubber aggregate and a sheet rubber aggregate.

A rubber such as a fluoro rubber is sometimes formed into an uncrosslinked rubber sheet for shipment because of its easy handling. Usually, the uncrosslinked rubber sheet is formed by coagulating rubber latex with a coagulation liquid to form an uncrosslinked rubber coagulated particle (see, for example, Patent Document 1), and then drying the uncrosslinked rubber coagulated particle. Is formed by biaxial extrusion or the like.
JP 2002-317003 A

An object of the present invention is to reduce the time spent for molding an uncrosslinked rubber sheet and reduce the molding cost of the uncrosslinked rubber sheet.

The method for producing a long rubber agglomerate according to the first invention includes a water-containing long rubber agglomerate production process and a water-containing long rubber agglomerate dehydration process. In the hydrous long rubber agglomerate manufacturing process, the rubber latex is continuously brought into contact with the coagulation liquid to produce a hydrous long rubber agglomerate. The “long rubber agglomerate” referred to herein may have a film shape, a sheet shape, a thread shape, or a string shape. May be. Further, the long rubber coagulated body may be produced by applying a rubber latex on a substrate and then applying the coagulating liquid, or by producing a spinning method using the latex and the coagulating liquid. Alternatively, it may be produced by a wet spinning method using latex and a coagulating liquid. The “coagulation” here may be salting out. The “coagulation liquid” referred to here is a monovalent, divalent or trivalent salt solution or acid solution, such as an aluminum sulfate aqueous solution or a magnesium chloride aqueous solution. The “rubber latex” referred to here may be a synthetic rubber latex or a natural rubber latex. Examples of the rubber latex include silicone rubber latex, ethylene propylene rubber latex, acrylonitrile butadiene rubber latex, styrene butadiene rubber latex, chloroprene rubber latex, acrylic rubber latex, butyl rubber latex, and fluorine rubber latex. In addition, a crosslinking agent or a filler may be added to the rubber latex in advance. The cross-linking agent may be in the form of fine powder, but in such a case, it is preferable to further add a dispersant. Examples of the filler include water-insoluble fillers such as carbon and talc. Then, in the water-containing long rubber coagulum dewatering step, moisture in the water-containing long rubber coagulum is reduced. In this water-containing long rubber agglomerate dewatering step, the water-containing long rubber agglomerate may be directly air-dried, or after the water content of the water-containing long rubber agglomerate is pushed out by a pair of pressure rollers. The hydrous long rubber coagulum may be air dried. Moreover, the long rubber agglomerate according to the present invention is different from the rubber agglomerate obtained by biaxial extrusion as in the prior art. The long rubber agglomerate according to the present invention is a porous body, and the conventional rubber agglomerate is obtained by biaxial extrusion, and has almost no pores due to the compressive force. The long rubber coagulum according to the present application is characterized in this respect.

In this method for producing a long rubber coagulum, first, a rubber latex is continuously brought into contact with the coagulation liquid in a hydrous long rubber coagulum production process to produce a hydrous long rubber coagulum. Subsequently, the water | moisture content in a water-containing long rubber coagulated body is reduced in a water-containing long rubber coagulated body dehydration process. That is, in this method for producing a long rubber agglomerate, an uncrosslinked sheet (corresponding to the “long rubber agglomerate” in the present invention) is directly produced from the rubber latex without passing through the uncrosslinked rubber agglomerated particles. Molded. For this reason, if this long rubber agglomerate manufacturing method is used, the time spent on the uncrosslinked rubber sheet molding can be greatly reduced as compared with the conventional method, and the molding cost of the uncrosslinked rubber sheet can be reduced. Can do. In addition, this long rubber coagulum production method does not require production equipment such as coagulator, granulator, solid-liquid separator, twin screw extruder, etc., and greatly simplifies the production equipment. Can do. For this reason, this long rubber agglomerate manufacturing method can reduce the manufacturing cost of uncrosslinked rubber sheet molding from the viewpoint of equipment. In addition, the advantages of adopting the method for producing a long rubber agglomerate according to the present invention include a clean working environment (because no agglomerates are produced), a quiet working environment, It is conceivable that the maintenance work of the equipment becomes easy, it can be applied to varieties that cannot be applied to the extruder, the varieties can be easily switched, and the raw material (rubber latex) loss is reduced.

Incidentally, a method for producing a rubber latex film is disclosed in JP-A-10-638 and JP-T-2004-514209. In the production method disclosed in the former publication, moisture in the latex is evaporated by a drum having a side temperature set at 35 to 70 ° C. and hot air of about 70 to 120 ° C. to form an uncrosslinked rubber sheet. Manufacture. On the other hand, in the production method disclosed in the latter publication, an uncrosslinked rubber sheet is produced by evaporating water in the latex using a drum dryer of 95 to 160 ° C. and a conveyor dryer of 95 to 170 ° C. Yes. For this reason, in order to implement these manufacturing methods, at least two heating devices are required. On the other hand, in the method for producing a long rubber agglomerate according to the present invention, an uncrosslinked rubber sheet is produced by continuous agglomeration, and a heating device is not particularly required. For this reason, the method for producing a long rubber agglomerate according to the present invention has an advantage that the production cost can be reduced as compared with the method for producing a rubber latex film disclosed in JP-A-10-638.

In addition, Japanese Patent Application Laid-Open No. 2004-269656 discloses a method for manufacturing a rubber sheet. In the manufacturing method disclosed in this publication, after the rubber solution is sandwiched between two supports and the rubber solution is thinned through a roll or the like, the thinned rubber solution is immersed in a coagulation bath. To produce uncrosslinked rubber sheets. For this reason, in order to implement this manufacturing method, a highly viscous rubber solution must be prepared. However, it is extremely difficult to increase the viscosity of the rubber latex to the level of a rubber solution, and high molecular weight fluorinated rubber having a high fluorine content tends to hardly dissolve in a solvent. On the other hand, in the method for producing a long rubber coagulum according to the present invention, an uncrosslinked rubber sheet can be produced directly from rubber latex. For this reason, the method for producing a long rubber agglomerate according to the present invention has an advantage that it can be applied to a wide variety of rubbers as compared with the method for producing a rubber sheet disclosed in Japanese Patent Application Laid-Open No. 2004-269656.

The long rubber agglomerate production method according to the second invention is the long rubber agglomerate production method according to the first invention, wherein the rubber latex is continuously formed in the hydrous long rubber agglomerate production process. After being poured into the material, the coagulated liquid is applied to the rubber latex on the base material from a specific position, so that a water-containing long rubber coagulated body is sequentially produced. The “how to apply the coagulation liquid” may be spraying, spraying, injection, dropping, or injection. And the long rubber agglomerate manufacturing method further includes a water-containing long rubber agglomerate peeling step. In the water-containing long rubber agglomerate peeling step, the water-containing long rubber agglomerate produced in the water-containing long rubber agglomerate production step is peeled from the substrate. Then, in the water-containing long rubber coagulum dewatering step, the moisture in the water-containing long rubber coagulated body peeled from the base material in the water-containing long rubber coagulated body peeling step is reduced.
In this method for producing a long rubber agglomerate, first, after the rubber latex is continuously applied to the base material in the hydrous long rubber agglomerate production process, the coagulation liquid is applied to the rubber latex on the base material from a specific position. The water-containing long rubber agglomerates are produced sequentially. Next, in the water-containing long rubber coagulated body peeling step, the water-containing long rubber coagulated body manufactured in the water-containing long rubber coagulated body manufacturing step is peeled off from the base material. And the water | moisture content in the water-containing long rubber coagulated body peeled from the base material at the water-containing long rubber coagulated body peeling step in the water-containing long rubber coagulated body dehydrating step is reduced. For this reason, if this long rubber coagulated body manufacturing method is utilized, a long rubber coagulated body can be manufactured without waste by an appropriate amount of coagulating liquid. In addition, as in the method for producing a rubber sheet disclosed in JP-A-2004-269656, it is conceivable to provide a coagulation bath and pass the rubber latex applied to the substrate therethrough. The viscosity of is very low, and the shape of the sheet may not be maintained. Further, when using a coagulation bath, the concentration of the coagulant is changed over time, which is not preferable because the management of the coagulation bath becomes complicated and the quality of the uncrosslinked rubber sheet may vary. .

The long rubber agglomerate manufacturing method according to the third invention is the long rubber agglomerate manufacturing method according to the second invention, and further includes a deposit removing step. In the adhering matter removing step, adhering matter adhering to the base material after the hydrated long rubber coagulum is peeled is removed. Here, the “adherent” refers to a coagulation liquid, a rubber latex residue, or the like. In the case where the substrate is an endless annular belt, this deposit removal step is realized by providing a liquid sucking device or the like on the downstream side of the endless annular belt where the long rubber coagulum is peeled off. The “liquid suction device” referred to here is, for example, a sponge roller mechanism.
In this method for producing a long rubber agglomerated material, the adhering material adhering to the substrate after the water-containing long rubber agglomerated material is peeled off in the adhering material removing step is removed. For this reason, if this long rubber agglomerate manufacturing method is utilized, rubber latex can always be supplied to a clean substrate. Therefore, if this long rubber agglomerate manufacturing method is used, a high quality long rubber agglomerate can be produced.

The method for producing a long rubber agglomerate according to the fourth invention is a method for producing a long rubber agglomerate according to the second invention or the third invention, wherein the water-containing long rubber agglomerate dehydration step includes a water-containing length. A pressure-sensitive rubber agglomerate pressing step and a water-containing long rubber agglomerate air-drying step are included. In the water-containing long rubber agglomerate pressing step, the water-containing long rubber agglomerate is passed between at least a pair of pressure rollers. Further, in the water-containing long rubber coagulum air drying step, the water-containing long rubber coagulum after the water-containing long rubber coagulum pressurizing step is air-dried. The “air drying” here may be hot air drying or cold air drying. When a crosslinking agent is added to the rubber latex and hot air drying is used, the hot air temperature needs to be set to a temperature that does not initiate the crosslinking reaction. In addition, a wind dryer may be used for air drying of the water-containing long rubber coagulum, a guide roller or the like blown with anti-adhesion air may be used, or adhesion to the wind dryer. You may utilize in combination with the guide roller from which prevention air is blowing.

In this method for producing a long rubber agglomerate, the water-containing long rubber agglomerate is passed between at least a pair of pressure rollers in the water-containing long rubber agglomerate pressing step. Thereafter, the hydrous long rubber coagulum is air dried in the air drying step. Therefore, if this method for producing a long rubber agglomerated body is utilized, the water content in the long water agglomerated rubber agglomerated body can be pushed out in the water-containing long rubber agglomerated body pressing step, and the water-containing long rubber agglomerated body can be extruded. The strength of the precipitate can be improved. And the water-containing long rubber coagulated body whose strength has been increased in this way in the air drying process of the long rubber coagulated body can be completely dried.

The method for producing a long rubber agglomerate according to the fifth invention is a method for producing a long rubber agglomerate according to any one of the second invention to the fourth invention, further comprising a water-containing long rubber agglomerate washing step. Prepare. The water-containing long rubber agglomerate washing step may be performed between the water-containing long rubber agglomerate peeling step and the water-containing long rubber agglomerate dewatering step, or the water-containing long rubber agglomerate delamination step. It may be performed between the process and the hydrous long rubber coagulum pressurizing process, or may be performed between the hydrous long rubber coagulum pressurizing process and the hydrous long rubber coagulum air drying process. Also good. In the water-containing long rubber agglomerate washing step, the water-containing long rubber agglomerate peeled from the substrate in the water-containing long rubber agglomerate peeling step is washed with water.
In this method for producing a long rubber agglomerate, the water-containing long rubber agglomerate that has been peeled off from the base material in the water-containing long rubber agglomerate peeling step is washed with water. For this reason, if this long rubber coagulated body manufacturing method is utilized, the unnecessary component in rubber latex, the coagulant | flocculant in coagulating liquid, etc. can be removed from a long rubber coagulated body. Therefore, in this method for producing a long rubber agglomerate, a long rubber agglomerate having higher purity can be produced.

The method for producing a long rubber agglomerate according to the sixth aspect of the invention is a method for producing a long rubber agglomerate according to any of the second to fifth aspects of the invention, wherein the substrate has a part of the upper part being horizontal. It is an endless annular belt that is stretched around at least two rollers and circulates on a fixed track.
For this reason, if this long rubber agglomerate manufacturing method is utilized, a long rubber agglomerate can be easily manufactured from a low viscosity rubber latex. Incidentally, if the base material is a drum as disclosed in JP-A-10-638, there is a disadvantage that only a very thin film-like long rubber coagulum can be obtained from a low-viscosity rubber latex. is there.

The method for producing a long rubber agglomerate according to the seventh invention is the method for producing a long rubber agglomerate according to the sixth invention, wherein the endless annular belt extends from the outer surface to the entire circumference along the circumferential direction. It has at least two wall portions that are erected. Further, the endless annular belt is stretched around the roller so as to have a higher portion higher than the horizontal portion before and after the horizontal portion.
For this reason, if this long rubber coagulated body manufacturing method is utilized, a low-viscosity rubber latex can be held on an endless annular belt for a certain period of time at a certain height. Therefore, if a method for producing a long rubber agglomerate is utilized, a long rubber agglomerate having a relatively thick thickness can be produced from a low viscosity rubber latex.

The long rubber agglomerate production method according to the eighth invention is the long rubber agglomerate production method according to the sixth invention, wherein the endless annular belt extends from the outer surface to the entire circumference along the circumferential direction. It has at least two wall portions that are erected. Moreover, the liquid stop wall arrange | positioned with an endless annular belt and a slight clearance gap is provided between wall parts. The liquid stop wall may be provided only on the upstream side of the belt, or may be provided on both the upstream side and the downstream side.
For this reason, if this long rubber coagulated body manufacturing method is utilized, a low-viscosity rubber latex can be held on an endless annular belt for a certain period of time at a certain height. Therefore, if a method for producing a long rubber agglomerate is utilized, a long rubber agglomerate having a relatively thick thickness can be produced from a low viscosity rubber latex.

The long rubber coagulated body manufacturing method according to the ninth aspect of the present invention is the long rubber coagulated body manufacturing method according to any of the sixth to eighth aspects of the present invention, wherein vibration is applied to the endless annular belt.
For this reason, if this long rubber coagulated body manufacturing method is utilized, a rubber latex and coagulated liquid can be contacted more uniformly in a water-containing long rubber coagulated body manufacturing process. Therefore, if this long rubber agglomerate manufacturing method is utilized, a long rubber agglomerate having more uniform quality in the thickness direction can be produced.

The method for producing a sheet-like rubber agglomerate according to the tenth invention comprises a rubber latex charging step, a hydrous sheet-like rubber agglomerate production step, and a hydrous sheet-like rubber agglomerate dehydration step. In the rubber latex charging step, a predetermined amount of rubber latex is stretched on the container. As the “container” here, for example, a container having a relatively wide bottom such as a tray is preferable. In the sheet-like rubber agglomerate manufacturing process, the coagulating liquid is brought into contact with the rubber latex stretched on the container to produce a water-containing sheet-like rubber agglomerate. In the hydrous sheet-like rubber coagulum dewatering step, moisture in the hydrous sheet-like rubber coagulum is reduced. The sheet-like rubber agglomerate according to the present invention is different from the rubber agglomerate obtained by biaxial extrusion as in the prior art. The sheet-like rubber agglomerate according to the present invention is a porous body, and the conventional rubber agglomerate is obtained by biaxial extrusion, and has almost no pores due to the compressive force. The sheet-like rubber aggregate according to the present application is characterized in this respect.

In this sheet-like rubber agglomerate manufacturing method, first, a predetermined amount of rubber latex is stretched on the container in the rubber latex charging step. Next, in the hydrous sheet-like rubber coagulum production process, the coagulant liquid is brought into contact with the rubber latex stretched on the container to produce the hydrous sheet-like rubber coagulum. And the water | moisture content in a water-containing sheet-like rubber coagulum is reduced in a water-containing sheet-like rubber agglomerate dehydration process. That is, in this method for producing a sheet-like rubber coagulum, an uncrosslinked rubber sheet (corresponding to the “sheet-like rubber coagulum” in the present invention) is directly passed from the rubber latex without passing through the uncrosslinked rubber coagulated granules. Is formed. For this reason, if this sheet-like rubber agglomerate manufacturing method is used, the time spent for uncrosslinked rubber sheet molding can be greatly shortened compared to the conventional method, and the molding cost of the uncrosslinked rubber sheet can be reduced. Can do. In addition, in this method for producing a sheet-like rubber coagulum, production equipment such as a coagulator, a granulator, a solid-liquid separator, and a twin screw extruder is not required, and the production equipment is greatly simplified. Can do. For this reason, this sheet-shaped rubber agglomerate manufacturing method can reduce the manufacturing cost of uncrosslinked rubber sheet molding even from the viewpoint of equipment. In addition, as an advantage of adopting the sheet-like rubber agglomerate production method according to the present invention, the work environment is clean (because no agglomerates are produced), the work environment is quiet, the equipment It is conceivable that the maintenance work of the apparatus becomes easy, it can be applied to varieties that cannot be applied to the extruder, the varieties can be easily switched, and the raw material (rubber latex) loss is reduced.

By using the method for producing a long rubber agglomerate according to the first invention, it is possible to significantly reduce the time spent for forming the uncrosslinked rubber sheet as compared with the conventional method, and thus, reducing the molding cost of the uncrosslinked rubber sheet. be able to. In addition, this long rubber coagulum production method does not require production equipment such as coagulator, granulator, solid-liquid separator, twin screw extruder, etc., and greatly simplifies the production equipment. Can do. For this reason, this long rubber agglomerate manufacturing method can reduce the manufacturing cost of uncrosslinked rubber sheet molding from the viewpoint of equipment. In addition, the advantages of adopting the method for producing a long rubber agglomerate according to the present invention include a clean working environment (because no agglomerates are produced), a quiet working environment, It is conceivable that the maintenance work of the equipment becomes easy, it can be applied to varieties that cannot be applied to the extruder, the varieties can be easily switched, and the raw material (rubber latex) loss is reduced.

If the method for producing a long rubber agglomerate according to the second invention is utilized, a long rubber agglomerate can be produced without waste with an appropriate amount of the coagulation liquid.
If the long rubber agglomerate manufacturing method according to the third aspect of the invention is used, the rubber latex can be supplied to a clean substrate at all times. Therefore, if this long rubber agglomerate manufacturing method is used, a high quality long rubber agglomerate can be produced.
If the method for producing a long rubber agglomerate according to the fourth invention is utilized, in the water-containing long rubber agglomerate pressurizing step, moisture in the water-containing long rubber agglomerate can be extruded and the long rubber agglomerate can be extruded. The strength of the precipitate can be improved. And the water-containing long rubber coagulated body thus increased in strength in the air-drying process can be completely dried.
If the method for producing a long rubber coagulum according to the fifth invention is used, unnecessary components in the rubber latex, coagulant in the coagulation liquid, and the like can be removed from the long rubber coagulum. Therefore, in this method for producing a long rubber agglomerate, a long rubber agglomerate having higher purity can be produced.

If the method for producing a long rubber agglomerate according to the sixth invention is utilized, a long rubber agglomerate can be easily produced from a rubber latex having a low viscosity.
If the long rubber agglomerate manufacturing method according to the seventh aspect of the invention is used, a low-viscosity rubber latex can be held on the endless annular belt at a constant height for a certain period of time. For this reason, if the long rubber agglomerate manufacturing method is utilized, a long rubber agglomerate having a relatively thick thickness can be produced from a low viscosity rubber latex.
If the method for producing a long rubber agglomerate according to the eighth invention is utilized, a low-viscosity rubber latex can be held at a constant height on an endless annular belt for a certain period of time. For this reason, if the long rubber agglomerate manufacturing method is utilized, a long rubber agglomerate having a relatively thick thickness can be produced from a low viscosity rubber latex.

If the method for producing a long rubber agglomerate according to the ninth invention is utilized, the rubber latex and the coagulated liquid can be brought into contact more uniformly in the hydrous long rubber agglomerate production process. For this reason, if this long rubber agglomerate manufacturing method is utilized, the long rubber agglomerate which has more uniform quality by the thickness direction can be manufactured.
If the sheet-like rubber agglomerate manufacturing method according to the tenth invention is used, the time spent for uncrosslinked rubber sheet molding can be greatly reduced as compared with the conventional method, and the molding cost of the uncrosslinked rubber sheet can be reduced. be able to. In addition, in this method for producing a sheet-like rubber coagulum, production equipment such as a coagulator, a granulator, a solid-liquid separator, and a twin screw extruder is not required, and the production equipment is greatly simplified. Can do. For this reason, this sheet-shaped rubber agglomerate manufacturing method can reduce the manufacturing cost of uncrosslinked rubber sheet molding even from the viewpoint of equipment. In addition, as an advantage of adopting the sheet-like rubber agglomerate production method according to the present invention, the work environment is clean (because no agglomerates are produced), the work environment is quiet, the equipment It is conceivable that the maintenance work of the equipment becomes easy, it can be applied to varieties that cannot be applied to the extruder, the varieties can be easily switched, and the raw material (rubber latex) loss is reduced.

It is a simplified lineblock diagram showing some composition of a long rubber agglomerate manufacturing device concerning a 1st embodiment of the present invention. It is a simple lineblock diagram showing composition of the other part of a long rubber agglomerate manufacturing device concerning a 1st embodiment of the present invention. It is AA sectional drawing of the long rubber coagulum manufacturing apparatus which concerns on 1st Embodiment of this invention. It is a longitudinal cross-sectional view of the lower side drying guide roller provided in the elongate rubber agglomerate manufacturing apparatus which concerns on one Embodiment of this invention. It is a longitudinal cross-sectional view of the 2nd drying guide roller provided in the elongate rubber agglomerate manufacturing apparatus which concerns on 1st Embodiment of this invention. It is a simplification block diagram of the sheet-like rubber coagulum manufacturing apparatus which concerns on 2nd Embodiment of this invention.

Explanation of symbols

11 Endless annular belt (base material)
11b Wall 12 Subordinate roller (roller)
13 Driving roller (roller)
71 Pressure roller CL Coagulation liquid LC Long rubber coagulation sheet (long rubber coagulation body)
Pf Horizontal part Ph High part RL Rubber latex

-First embodiment-
The long rubber coagulated sheet manufacturing apparatus 1 according to the first embodiment of the present invention mainly includes a belt device 10, a rubber latex supply device 20, and a coagulation liquid supply device 30 as shown in FIGS. 1 and 2. The belt cleaning device 40, the first main guide roller 51, the second main guide roller 61, the dehydrating device 70, the cleaning device 80, the drying device 90, and the product tray 111. Hereinafter, these components will be described in detail.
(1) Belt Device As shown in FIGS. 1 and 3, the belt device 10 mainly includes an endless annular belt 11, a driving roller 13, a secondary roller 12, a first restraining roller 14, and a second restraining roller 15. Has been.

As shown in FIGS. 1 and 3, the endless annular belt 11 mainly includes a main body portion 11a and a pair of wall portions 11b. The wall portion 11b is erected over the entire circumference along the circumferential direction from the outer surface slightly inside the edge of the main body portion 11a. The endless annular belt 11 is stretched around the drive roller 13 and the slave roller 12 with the wall portion 11b facing outward. In addition, it is preferable that the main-body part 11a is formed with metal materials, such as stainless steel, from a viewpoint of intensity | strength. Moreover, it is preferable that this main-body part 11a is hydrophilically processed (refer 2nd Embodiment). Further, the wall portion 11b is preferably formed of a hydrophobic material that can be easily molded, such as rubber.
An electric motor (not shown) is mounted on the driving roller 13 and is driven to rotate about the shaft by the electric motor.

The sub-roller 12 is a roller having the same radius as that of the driving roller 13, and is installed so that the axis thereof is parallel to the axis of the driving roller 13. Further, the plane including the axis of the slave roller 12 and the axis of the drive roller 13 is in a relationship parallel to the horizontal direction, that is, in a relationship orthogonal to the vertical direction.
The first restraining roller 14 is a roller having a width that matches the width of the space sandwiched between the wall portions 11 b of the endless annular belt 11. It presses toward the subordinate roller 12 from the upper surface of 11a. In this state, the first restraining roller 14 is caught between the wall portions 11b.
The second restraining roller 15 is a roller having a width that coincides with the width of the space sandwiched between the wall portions 11 b of the endless annular belt 11. It is pressed toward the driving roller 13 from the upper surface of 11a. In this state, the second restraining roller 15 is caught between the wall portions 11b.

In this belt device 10, a horizontal portion Pf is formed in the upper part of the endless annular belt 11 between the contact point with the first restraining roller 14 and the contact point with the second restraining roller 15, and the slave roller 12. And the high-order part Ph which contacts the circular arc surface of the upper part of the drive roller 13 is formed. Note that the high-order portion Ph is positioned higher than the horizontal portion Pf. Further, in order to keep the upper surface of the endless annular belt 11 horizontal without causing the tension of the endless annular belt 11 to be excessive, a follower type roller row 16 is appropriately provided on the upper back of the endless annular belt 11. Provided.
(2) Rubber Latex Supply Device As shown in FIG. 1, the rubber latex supply device 20 mainly includes a rubber latex storage tank 21, a rubber latex supply pipe 22, a rubber latex supply amount adjustment valve 23, and a rubber latex discharger 24. It is composed of

As shown in FIG. 1, the rubber latex RL is stored in the rubber latex storage tank 21. In addition, the specific gravity of this rubber latex RL is larger than the specific gravity of water.
The rubber latex supply pipe 22 is a pipe extending from the lower end of the rubber latex storage tank 21 to the rubber latex discharger 24.
The rubber latex supply amount adjustment valve 23 is provided in the middle of the rubber latex supply pipe 22 and plays a role of adjusting the supply amount of the rubber latex RL flowing from the rubber latex storage tank 21 to the rubber latex discharger 24.
The rubber latex discharger 24 is a horizontally long container slightly narrower than the width of the space sandwiched between the wall portions 11b of the endless annular belt 11, and has a horizontally long slit-shaped discharge port (not shown) at the lower end. Yes. The rubber latex RL guided to the rubber latex discharger 24 is supplied to a space sandwiched between the wall portions 11b of the horizontal portion Pf of the endless annular belt 11 through the discharge port.

(3) Coagulated liquid supply device As shown in FIG. 1, the coagulated liquid supply device 30 mainly includes a coagulated liquid storage tank 31, a coagulated liquid supply pipe 32, a coagulated liquid supply amount adjustment valve 33, and The coagulating liquid sprayer 34 is configured.
As shown in FIG. 1, the coagulating liquid storage tank 31 stores the coagulating liquid CL. The coagulation liquid CL is, for example, an aluminum sulfate aqueous solution.
The coagulated liquid supply pipe 32 is a pipe extending from the lower end of the coagulated liquid storage tank 31 to the coagulated liquid sprayer 34.
The coagulating liquid supply amount adjusting valve 33 is provided in the middle of the coagulating liquid supply pipe 32, and serves to adjust the supply amount of the coagulating liquid CL flowing from the coagulating liquid storage tank 31 to the coagulating liquid sprayer 34. Is responsible.

The coagulating liquid sprayer 34 is a horizontally long container slightly narrower than the width of the space sandwiched between the wall portions 11b of the endless annular belt 11, and has a horizontally long coagulating liquid spray port (not shown) at the lower end. ing. Then, the coagulating liquid CL guided to the coagulating liquid sprayer 34 is sprayed onto the rubber latex RL poured into the endless annular belt 11 through the coagulating liquid spraying port.
(4) Belt Cleaning Device The belt cleaning device 40 is a device installed in the vicinity of the drive roller 13 on the upper side of the endless annular belt 11, and as shown in FIG. That is, the first sponge roller 41, the second sponge roller 42, the third sponge roller 43, the squeezing roller 44, the first drain pan 45, and the first drain pipe 46 are included.
The first sponge roller 41 is a roller having a width that matches the width of the space sandwiched between the wall portions 11 b of the endless annular belt 11, and is located at a position near the drive roller 13 in the horizontal portion Pf of the endless annular belt 11. The roller surface is installed so as to contact the upper surface of the main body 11a of the belt 11. In this state, the first sponge roller 41 is fitted between the wall portions 11b. The first sponge roller 41 sucks out liquid residues (such as a dispersion medium of coagulated rubber latex and a residue of coagulated liquid) on the endless annular belt 11.

The second sponge roller 42 is in contact with the roller surface of the first sponge roller 41 and sucks the liquid residue sucked by the first sponge roller 41.
The third sponge roller 43 is in contact with the roller surface of the second sponge roller 42 and sucks the liquid residue sucked by the second sponge roller 42.
The squeezing roller 44 is installed so as to be pressed against the third sponge roller 43, and squeezes the liquid residue sucked by the third sponge roller 43 to the first drainage tray 45.
The first drain tray 45 is provided for receiving liquid residue.
The first drain pipe 46 guides the liquid residue squeezed out to the first drain tray 45 to a drain tank (not shown).
(5) First main guide roller and second main guide roller The first main guide roller 51 and the second main guide roller 61 peel off the hydrous long rubber coagulation sheet LCo produced on the endless annular belt 11. It is provided to guide the dehydrator 70.

(6) Dehydrating device As shown in FIG. 1, the dehydrating device 70 mainly includes a pressure roller 71, a second drain tray 72, and a second drain pipe 73.
The pressure roller 71 compresses and dehydrates the hydrous long rubber coagulated sheet LCo and increases the density of coagulated materials in the hydrous long rubber coagulated sheet LCo. Hereinafter, the long rubber coagulated sheet LC dehydrated and densified in this manner is referred to as “high density long rubber coagulated sheet LCp”.
The second drainage tray 72 is provided to receive moisture squeezed out by the pressure roller 71 from the water-containing long rubber coagulation sheet LCo.
The second drain pipe 73 guides the water squeezed out to the second drain tray 72 to a drain tank (not shown).

(7) Cleaning Device As shown in FIG. 1, the cleaning device 80 mainly includes a first cleaning guide roller 81, a second cleaning guide roller 82, a third cleaning guide roller 83, and a cleaning tank 84. .
The first cleaning guide roller 81 and the second cleaning guide roller 82 are provided to guide the high-density long rubber coagulated sheet LCp to the cleaning tank 84.
The third guide roller is provided to guide the washed high-density long rubber coagulated sheet LCp (hereinafter referred to as “cleaned long rubber coagulated sheet LCw”) to the drying device 90.
A cleaning liquid WL is stored in the cleaning tank 84. The second cleaning guide roller 82 is immersed in this cleaning liquid.
(8) Drying Device As shown in FIG. 2, the drying device 90 mainly includes a drying furnace 91, a first drying guide roller 92, and a second drying guide roller 93.

As shown in FIG. 2, the drying furnace 91 is provided with a plurality of pairs of first drying guide rollers 92, one second drying guide roller 93 less than the first drying guide roller 92, and a heating device (not shown). Yes.
The first drying guide roller 92 includes an upper drying guide roller 92a and a lower drying guide roller 92b.
As shown in FIG. 4, the lower drying guide roller 92b mainly includes a shaft 921b, a block body 922b, and a cylindrical body 923b. The shaft 921b is a columnar bar-like member, and is disposed along the axis of the cylindrical body 923b. The shaft 921b is coupled to the cylindrical body 923b at the end of the cylindrical body 923b. As shown in FIG. 4, the block body 922b is a rod-shaped member having a substantially D-shaped cross section, and has a cylindrical through-hole extending in parallel to the flat surface portion Fp. The shaft 921b is inserted through the through hole of the block body 922b. The block body 922b is not coupled to the shaft 921b or the cylindrical body 923b. For this reason, in this block body 922b, the plane portion Fp always faces upward due to the weight balance. As shown in FIG. 4, the cylindrical body 923b has a plurality of through holes Pr in the radial direction, and is inserted outside the block body 922b. As a result, a horizontally long space SP is formed between the block body 922b and the portion of the cylindrical body 923b that comes into contact with the washed long rubber coagulation sheet LCw. Then, the dry heated air is supplied to the horizontally long space SP, and the dry heated air is discharged into the drying furnace 91 through the through hole Pr of the cylindrical body 923b.

As shown in FIG. 5, the second drying guide roller 93 mainly includes a shaft 931 and a cylindrical body 933. The shaft 931 is a columnar bar-like member, and is disposed along the axis of the cylindrical body 933. The shaft 931 is coupled to the cylindrical body 933 at the end of the cylindrical body 933. As shown in FIG. 4, the cylindrical body 933 has a plurality of through holes Pr in the radial direction and is inserted outside the shaft 931. As a result, a cylindrical space SP is formed between the shaft 931 and the cylindrical body 933. Then, dry heating air is supplied to the cylindrical space SP, and the dry heating air is discharged into the drying furnace 91 through the through hole Pr of the cylindrical body 933.
The washed long rubber coagulated sheet LCw is dried by the drying device 90 configured as described above. Hereinafter, the washed long rubber coagulated sheet LCw thus dried is referred to as “dried long rubber coagulated sheet LCd”.

(9) Product receiving tray The product receiving tray 111 receives the dried long rubber coagulation sheet LCd fed from the drying device 90 via the auxiliary guide roller 101.
<How to use the long rubber coagulum manufacturing apparatus>
At the start of production of the long rubber coagulated sheet LC, a lead film (not shown) is required. First, the lead film is set along the pass line of the long rubber coagulation sheet LC from the rubber latex discharger 24 to the auxiliary guide roller 101. After the lead film is set in this way, the rubber latex RL is supplied from the rubber latex discharger 24 onto the end of the lead film on the rubber latex discharger side, and the lead film is fed by various rollers. Then, continuous formation of the long rubber coagulated sheet LC is started. Then, when a certain time elapses, the lead film is discharged out of the system, and the long rubber coagulated sheet manufacturing apparatus 1 causes the long rubber coagulated sheet LC to flow in the pass line. In addition, when changing the type of latex, the long rubber coagulation sheet LC of the rubber latex before the change can be used as a lead film.

<Flow of long rubber coagulated sheet in long rubber coagulated body production apparatus>
Here, the change of the long rubber coagulated sheet in the long rubber coagulated sheet manufacturing apparatus 1 will be described.
In the long rubber coagulated sheet manufacturing apparatus 1, first, the rubber latex RL is continuously supplied from the rubber latex discharger 24 onto the endless annular belt 11 that circulates. And when this rubber latex RL passes under the coagulation liquid sprayer 34, coagulation liquid CL is sprayed and coagulated continuously, and it becomes a porous water-containing long rubber coagulation sheet LCo. Thereafter, the water-containing long rubber coagulated sheet LCo is peeled from the endless annular belt 11 by the first main guide roller 51 and the second main guide roller 61 and guided to the dehydrating device 70. Then, the water-containing long rubber coagulated sheet LCo led to the dehydrating device 70 passes through the pressure roller 71 to become a high-density long rubber coagulated sheet LCp, and the first cleaning guide roller 81 and the second cleaning guide roller 82 to the cleaning tank 84. The high-density long rubber coagulated sheet LCp passes through the cleaning tank 84 to become a washed long rubber coagulated sheet LCw, and is guided to the drying furnace 91 by the first drying guide roller 92. Then, the washed long rubber coagulated sheet LCw passes through the drying furnace 91 and becomes the dried long rubber coagulated sheet LCd. Finally, the dried long rubber coagulated sheet LCd is supplied to the product tray 111 by the auxiliary guide roller 101.

<Characteristics of long rubber coagulum manufacturing equipment>
(1)
In the long rubber coagulated sheet manufacturing apparatus 1 according to the first embodiment, the rubber latex RL is supplied onto the circulating endless annular belt 11, and then the coagulated liquid CL is sprayed on the rubber latex RL, so that the porous A long rubber coagulation sheet LC is sequentially formed. The long rubber coagulated sheet LC is peeled from the endless annular belt 11 and then dehydrated through the dehydrating device 70 and the drying device 90. That is, in this long rubber coagulated sheet manufacturing apparatus 1, an uncrosslinked rubber sheet is directly formed from the rubber latex RL without passing through the uncrosslinked rubber coagulated particles. For this reason, in this long rubber coagulated sheet manufacturing apparatus 1, the time spent for uncrosslinked rubber sheet molding can be greatly reduced as compared with the conventional case, and as a result, the molding cost of the uncrosslinked rubber sheet can be reduced. . Moreover, in this long rubber coagulation sheet manufacturing apparatus 1, manufacturing equipment, such as a coagulator, a granulator, a solid-liquid separator, and a twin screw extruder, is not required, and the manufacturing equipment is greatly simplified. ing. For this reason, this long rubber coagulated sheet manufacturing apparatus 1 reduces the manufacturing cost of uncrosslinked rubber sheet molding even from the viewpoint of equipment. In addition, if this long rubber coagulation sheet manufacturing apparatus 1 is adopted, the work environment becomes clean (because coagulation granules are not manufactured), the work environment becomes quiet, and maintenance work of equipment is performed. Can be applied to varieties that cannot be applied to the extruder, can be easily switched, and can reduce the raw material (rubber latex) loss.

(2)
In the long rubber coagulation sheet manufacturing apparatus 1 according to the first embodiment, a coagulation liquid sprayer 34 is employed instead of the coagulation bath. For this reason, in this long rubber coagulation sheet manufacturing apparatus 1, the long rubber coagulation sheet LC can be manufactured without waste by an appropriate amount of the coagulation liquid CL.
(3)
In the long rubber coagulated sheet manufacturing apparatus 1 according to the first embodiment, a belt cleaning device 40 is provided. The belt cleaning device 40 removes the liquid residue on the endless annular belt 11 after the water-containing long rubber coagulated sheet LCo is peeled off from the endless annular belt 11. For this reason, in this long rubber coagulated sheet manufacturing apparatus 1, the rubber latex RL can be supplied to the endless annular belt 11 that is always in a clean state. Therefore, in this long rubber coagulated sheet manufacturing apparatus 1, a high quality long rubber coagulated sheet LC is manufactured.

(4)
In the long rubber coagulated sheet manufacturing apparatus 1 according to the first embodiment, the hydrous long rubber coagulated sheet LCo is passed between the pressure rollers 71, and then the long rubber coagulated sheet LC is formed in the drying device 90. Air dried. For this reason, in this long rubber coagulated sheet manufacturing apparatus 1, the moisture in the water-containing long rubber coagulated sheet LCo is pushed out in the dehydrator 70 and the density of the long rubber coagulated sheet LC is increased. The strength of the scale rubber coagulation sheet LC is improved. Then, the long rubber coagulated sheet LC having such increased strength is completely dried in the drying device 90.
(5)
In the long rubber coagulated sheet manufacturing apparatus 1 according to the first embodiment, the high-density long rubber coagulated sheet LCp is washed with water in the cleaning device 80. For this reason, in this long rubber coagulation sheet manufacturing apparatus 1, unnecessary components in the rubber latex PL, coagulant in the coagulation liquid CL, and the like are removed from the long rubber coagulation sheet LC. Therefore, in this long rubber coagulated sheet manufacturing apparatus 1, a long rubber coagulated sheet LC with higher purity is manufactured.

(6)
In the long rubber coagulated sheet manufacturing apparatus 1 according to the first embodiment, an endless annular belt 11 is employed instead of a drum as a base material for applying the rubber latex RL. For this reason, in the long rubber coagulated sheet manufacturing apparatus 1, a relatively thick long rubber coagulated sheet LC can be easily manufactured even with the low-viscosity rubber latex RL.
(7)
In the long rubber coagulated sheet manufacturing apparatus 1 according to the first embodiment, the endless annular belt 11 is provided with a wall portion 11b. Further, in this long rubber coagulated sheet manufacturing apparatus 1, a horizontal portion Pf is formed in the upper part of the endless annular belt 11 between the contact point with the first restraining roller 14 and the contact point with the second restraining roller 15. In addition, a high-order portion Ph that is in contact with the arcuate surfaces of the upper portion of the slave roller 12 and the driving roller 13 is formed. For this reason, in this long rubber coagulated sheet manufacturing apparatus 1, the low-viscosity rubber latex RL can be held on the endless annular belt 11 at a constant height for a certain period of time. Therefore, in this long rubber coagulated sheet manufacturing apparatus 1, the long rubber coagulated sheet CL having a relatively thick thickness can be manufactured from the low viscosity rubber latex RL.

(8)
In the long rubber coagulated sheet manufacturing apparatus 1 according to the first embodiment, dry heated air is also blown out from the second drying guide roller 93 and the lower drying guide roller 92b. For this reason, in this long rubber coagulated sheet manufacturing apparatus 1, adhesion of the washed long rubber coagulated sheet LCw to the second drying guide roller 93 and the lower drying guide roller 92b is prevented. For this reason, in this long rubber coagulation sheet manufacturing apparatus 1, the long rubber coagulation sheet LC can be manufactured smoothly.
<Modification of First Embodiment>
(A)
Although not particularly mentioned in the previous embodiment, forced cooling may be performed after heat drying. In such a case, the long rubber coagulated sheet LC may be produced while flowing an adhesion preventing film such as a polyethylene sheet through the pass line. If it does in this way, adhesion of long rubber coagulation sheet LC piled up on product saucer 111 can be prevented, and handling of subsequent long rubber coagulation sheet LC will become easy.

(B)
In the long rubber coagulated sheet manufacturing apparatus 1 according to the previous embodiment, a horizontal portion between the contact point with the first restraining roller 14 and the contact point with the second restraining roller 15 in the upper part of the endless annular belt 11. In addition to the formation of Pf, a high-order portion Ph that contacts the arcuate surfaces of the upper portion of the slave roller 12 and the driving roller 13 was formed. However, the first restraining roller 14 and the second restraining roller 15 are removed so that the endless annular belt 11 is stretched only on the driving roller 13 and the slave roller 12, and the endless annular belt 11 is interposed between the wall portions 11b of the endless annular belt 11. A pair of liquid stop walls arranged with a slight gap from the belt 11 may be provided.
(C)
Although not particularly mentioned in the previous embodiment, a vibrator may be attached to the belt device 10. In this way, the rubber latex RL and the coagulation liquid CL can be brought into contact more quickly and uniformly on the endless annular belt 11, and a long rubber coagulate having a more uniform quality in the thickness direction is produced. be able to.

(D)
In the long rubber coagulated sheet manufacturing apparatus 1 according to the previous embodiment, the dried long rubber coagulated sheet LCd fed from the drying device 90 via the auxiliary guide roller 101 is stacked on the product tray 111. Instead of the auxiliary guide roller, or after the auxiliary guide roller, a winding roller may be installed to wind up the dried long rubber coagulated sheet LCd.
(E)
Although not particularly mentioned in the previous embodiment, a crosslinking agent may be mixed in the rubber latex RL stored in the rubber latex storage tank 21 in advance. Further, if necessary, a crosslinking agent dispersant may be mixed at the same time. This is preferably the same as the dispersion of rubber latex. In such a case, the drying temperature in the drying device 90 and the temperature of the drying heating air blown out from the second drying guide roller 93 and the lower drying guide roller 92b need to be set to a temperature at which the crosslinking reaction does not start.

(F)
Although not particularly mentioned in the previous embodiment, a cross-linking agent may be mixed in the coagulation liquid CL stored in the coagulation liquid storage tank 31 in advance. In such a case, it is necessary to set the drying temperature in the drying device 90 and the temperature of the dry heated air blown out from the second drying guide roller 93 and the lower drying guide roller 92b so that the crosslinking reaction does not start.
(G)
Although not particularly mentioned in the previous embodiment, a water-insoluble filler such as carbon or talc may be mixed in the rubber latex RL stored in the rubber latex storage tank 21.
(H)
Although not particularly mentioned in the previous embodiment, a rubber coagulated yarn may be continuously produced using a known pulling spinning method or wet spinning method.

(I)
In the long rubber coagulated sheet manufacturing apparatus 1 according to the previous embodiment, the drying heating air is blown out from the second drying guide roller 93 and the lower drying guide roller 92b. The temperature of the air blown from the guide roller 92b is not particularly limited, and may be room temperature.
(J)
In the long rubber coagulated sheet manufacturing apparatus 1 according to the previous embodiment, three

sponge rollers

41, 42, 43 are provided. Instead, one sponge roller having a large diameter is squeezed out. You may install it against. Further, when the amount of liquid treatment is large, it is possible to use a pump to suck the liquid instead of the sponge roller, and to perform cleaning with the roller.

(K)
In the long rubber coagulated sheet manufacturing apparatus 1 according to the previous embodiment, the coagulating liquid CL is sprayed after the rubber latex RL is supplied onto the endless annular belt 11. The rubber latex RL may be sprayed after being supplied to the top.
-Second Embodiment-
In the second embodiment of the present invention, an intended sheet-like rubber coagulation is performed through a rubber latex charging step, a coagulating liquid spraying step, a hydrous sheet-like rubber coagulum lifting step, and a hydrous sheet-like rubber coagulum drying step. The body is obtained.
In the rubber latex charging step, rubber latex is charged into the tray to form a rubber latex liquid film.

In the coagulating liquid spraying step, the coagulating liquid is sprayed onto the liquid film of rubber latex stretched on the tray, and a hydrous sheet-like rubber coagulated body is formed after a certain period of time. This coagulation liquid is the same as that used in the first embodiment. In this step, the coagulation liquid may simply be poured into the tray.
In the water-containing sheet-like rubber agglomerate pulling step, the water-containing sheet-like rubber agglomerate is removed from the tray.
In the water-containing sheet-like rubber agglomerate drying step, the water-containing sheet-like rubber agglomerate taken out from the tray is dried. As the drying method, the method described in the first embodiment can be used.
In addition, manufacture of a sheet-like rubber coagulation body may be continuously performed by the rubber coagulation sheet manufacturing apparatus 201 as shown in FIG.

As shown in FIG. 6, the rubber coagulated sheet manufacturing apparatus 201 according to the second embodiment mainly includes a belt device with tray 210, a rubber latex supply device 20, a coagulation liquid supply device 30, a product tray 221, and waste water. It consists of a tray 222 and a drain pipe 223.
In the present embodiment, the rubber latex supply device 20 and the coagulation liquid supply device 30 are the same as the rubber latex supply device 20 and the coagulation liquid supply device 30 of the first embodiment. Therefore, description of the rubber latex supply device 20 and the coagulation liquid supply device 30 is omitted in the present embodiment, and the belt device with tray 210, the product tray 221, the drain tray 222 and the drain pipe 223 will be described in detail.
(1) Belt Device with Tray As shown in FIG. 6, the belt device with tray 210 mainly includes an endless annular belt 211, a plurality of trays 218, a driving roller 13, and a secondary roller 12.

The endless annular belt 211 is stretched around the drive roller 13 and the slave roller 12.
The driving roller 13 and the sub roller 12 are the same as the driving roller 13 and the sub roller 12 according to the first embodiment. Therefore, the description is omitted here.
The tray 218 is a stainless steel tray, and the inner surface is smoothed by buffing. The tray 218 has a surface coated with a hydrophilizing agent such as sodium pyrophosphate or an optical semiconductor catalyst. For this reason, the rubber latex RL easily spreads on the bottom of the tray, and the sheet-like rubber aggregate SC easily peels from the tray 218. In addition, as a preferable product of the hydrophilizing agent, Ecoclean manufactured by Ikeda Co., Ltd. can be mentioned.
In the belt device with a tray 210, as in the belt device 10 according to the first embodiment, the endless annular belt 211 is horizontally bent without bending the upper surface without excessively tensioning the endless annular belt 211. In order to keep it, a follower type roller row 16 is appropriately provided on the upper back of the endless annular belt 211.

(2) Product tray The product tray 221 receives the porous water-containing sheet-like rubber coagulation SC that peels off from the tray 218. The bottom of the product tray 221 has a mesh shape so that the residual liquid that falls almost simultaneously with the hydrous sheet-like rubber coagulum SC is not accumulated. The water-containing sheet-like rubber agglomerates SC stored in the product tray 221 are later dried.
(3) Drainage tray The drainage tray 222 is provided to receive the remaining liquid flowing through the product tray 221. That is, the product tray 221 is always on the drain tray 222.
(4) Drain pipe The drain pipe 223 guides the remaining liquid discharged to the drain tray 222 to a drain tank (not shown).

<Modification of Second Embodiment>
(A)
Although the tray 218 according to the previous embodiment is made of stainless steel, the tray may be made of glass or made of enamel.
(B)
Although not particularly mentioned in the previous embodiment, an adhesion preventing film such as a polyethylene sheet may be drawn on the tray 218 before the rubber latex RL is supplied. In such a case, it is not particularly necessary to make the inner surface of the tray hydrophilic.
(C)
Although not particularly mentioned in the previous embodiment, the trays 218 may be arranged in a plurality of rows in the width direction of the endless annular belt 211.

(D)
In the rubber coagulation sheet manufacturing apparatus 201 according to the previous embodiment, the belt device with tray 210 that circulates on the vertical plane is adopted, but instead of this, a circulation conveyor device with tray that circulates on the horizontal surface is adopted. It doesn't matter. In such a case, if a mechanism for reversing the conveyor is provided in a part of the conveyor device, the same convenience as that of the belt device with tray 210 can be obtained.
(E)
Although not particularly mentioned in the previous embodiment, the rubber latex RL and the coagulation liquid CL may be continuously supplied to the tray 218 or intermittently in accordance with the interval between the trays 218. It may be supplied. In addition, when the rubber latex RL and the coagulation liquid CL are continuously supplied, it is preferable that the interval between the adjacent trays 218 be extremely narrow.

Hereinafter, the present invention will be described in more detail using examples.

A stainless steel tray in which 200 mL of Daikin Industries' fluororubber latex G901 (solid content: 26% by mass, emulsifier: ammonium perfluorooctanoate, emulsifier added amount: 1000 wt. After pouring into (width 150 mm x depth 250 mm x depth 40 mm), the tray was arbitrarily tilted so that the fluororubber latex was evenly distributed over the bottom of the tray, and a liquid thin film of the fluororubber latex was formed on the bottom of the tray. Thereafter, 300 mL of 0.07 mass% aluminum sulfate aqueous solution was sprayed on the tray using a watering funnel. After 60 seconds, a porous sheet-like rubber coagulum having a thickness of 5 to 8 mm was formed on the bottom of the tray. It was. In addition, holes with a diameter of 2 to 3 mm were observed in this sheet-like rubber coagulum. And when this sheet-like rubber aggregate was peeled off from the tray, this sheet-like rubber aggregate was peeled off as one sheet without tearing. The residual liquid was transparent. Then, this residual liquid was collected in a beaker, and 0.5 mL of a 26.6 mass% liquid aluminum sulfate stock solution was added to the beaker and allowed to stand overnight. As a result, a precipitate (uncoagulated rubber) was obtained. In addition, the mass after drying of this deposit was 0.1 mg or less.

A tray made of stainless steel in which 200 mL of Daikin Industries' fluororubber latex G901 (solid content: 26% by mass, emulsifier: ammonium perfluorohexanoate, added amount of emulsifier: 2000 wt.ppm relative to the mass of water) is left horizontally. After pouring into (width 150 mm x depth 250 mm x depth 40 mm), the tray was arbitrarily tilted so that the fluororubber latex was evenly distributed over the bottom of the tray, and a liquid thin film of the fluororubber latex was formed on the bottom of the tray. Thereafter, 300 mL of 0.08 mass% aluminum sulfate aqueous solution was sprayed on the tray using a watering can. After 60 seconds, a porous sheet-like rubber coagulum having a thickness of 5 to 8 mm was formed on the bottom of the tray. It was. In addition, holes with a diameter of 1 to 2 mm were observed in this sheet-like rubber coagulum. And when this sheet-like rubber aggregate was peeled off from the tray, this sheet-like rubber aggregate was peeled off as one sheet without tearing. The residual liquid was transparent. Then, this residual liquid was collected in a beaker, and 0.5 mL of a 26.6 mass% liquid aluminum sulfate stock solution was added to the beaker and allowed to stand overnight. As a result, a precipitate (uncoagulated rubber) was obtained. In addition, the mass after drying of this deposit was 0.1 mg or less.

(Comparative example)
200 mL of Daikin Industries' fluororubber latex G901 (solid content: 26% by mass, emulsifier: ammonium perfluorohexanoate, added amount of emulsifier: 2000 wt.ppm relative to the mass of water) was poured into a horizontally placed beaker. Thereafter, 300 mL of 0.08 mass% aluminum sulfate aqueous solution was poured into the beaker, and the contents were stirred with a spatula for 60 seconds. Agglomerates were observed at the bottom of the beaker. When this aggregate was removed and the remaining liquid was observed, it was slightly cloudy. Then, the remaining liquid was collected in another beaker, and 0.5 mL of 26.6 mass% liquid aluminum sulfate stock solution was added to the beaker and left overnight. As a result, a precipitate (uncoagulated rubber) was obtained. . In addition, the mass after drying of this deposit was 135 mg or less.

The method for producing a long rubber agglomerate according to the present invention can significantly reduce the time spent for forming an uncrosslinked rubber sheet as compared with the conventional method, and thus can reduce the molding cost of the uncrosslinked rubber sheet. It has characteristics and is useful as a latex rubber coagulation method.

Claims

A hydrous long rubber coagulum production process for producing a hydrous long rubber coagulum by continuously contacting a rubber latex (RL) with a coagulation liquid (CL);
A method for producing a long rubber coagulum comprising: a water-containing long rubber coagulum dewatering step for reducing moisture in the water-containing long rubber coagulum.
In the water-containing long rubber coagulum manufacturing process, the rubber latex is continuously poured onto the base material (11), and then the coagulated liquid is applied to the rubber latex on the base material from a specific position. In turn, the water-containing long rubber coagulum is produced,
A water-containing long rubber coagulated body peeling step for peeling the water-containing long rubber coagulated body produced in the water-containing long rubber coagulated body producing step from the substrate;
2. The water content in the hydrous long rubber coagulum desorbed from the substrate in the hydrous long rubber coagulum dewatering step is reduced in the hydrous long rubber coagulum dewatering step. Long rubber coagulum production method.
An adhering matter removing step for removing adhering matter adhering to the base material after the water-containing long rubber coagulum is peeled off;
The method for producing a long rubber coagulum according to claim 2.
The water-containing long rubber agglomerate dehydration step includes a water-containing long rubber agglomerate pressurizing step, and a water-containing long rubber agglomerate air drying step,
In the water-containing long rubber agglomerate pressing step, the water-containing long rubber agglomerate is passed between at least a pair of pressure rollers (71),
The long rubber coagulation according to claim 2 or 3, wherein in the water-containing long rubber agglomerate air drying step, the water-containing long rubber agglomerate after the water-containing long rubber agglomerate pressurizing step is air-dried. Body manufacturing method.
5. The water-containing long rubber coagulated body washing step for washing the water-containing long rubber coagulated body peeled from the base material in the water-containing long rubber coagulated body removing step with water. 5. The manufacturing method of the long rubber agglomerate as described.
The base material is an endless annular belt that is stretched around at least two rollers (12, 13) so that a part of the upper part thereof is horizontal and circulates on a fixed track.
The method for producing a long rubber coagulum according to any one of claims 2 to 5.
The endless annular belt has at least two wall portions (11b) erected from the outer surface over the entire circumference along the circumferential direction, and is higher than the horizontal portion before and after the horizontal portion (Pf). (Ph) is stretched over the roller to have
The method for producing a long rubber coagulum according to claim 6.
The endless annular belt has at least two wall portions erected from the outer surface over the entire circumference along the circumferential direction,
The method for producing a long rubber agglomerated body according to claim 6, wherein a liquid stop wall is provided between the wall portions and disposed with a slight gap from the endless annular belt.
The method for producing a long rubber coagulum according to any one of claims 6 to 8, wherein vibration is applied to the endless annular belt.
A rubber latex charging step of applying a predetermined amount of rubber latex (RL) to the container (218);
A hydrous sheet-like rubber coagulum production process for producing a hydrous sheet-like rubber coagulum (SC) by bringing a coagulation liquid (CL) into contact with the rubber latex stretched on the container;
A method for producing a sheet-like rubber coagulum comprising a dehydrated water-containing sheet-like rubber coagulation dehydrating step for reducing moisture in the hydrated sheet-like rubber coagulum.