JP2008081870A - Papermaking roll and method for processing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide papermaking rolls having good paper separation from papermaking press rolls, providing even peel preventing effects of paper in the case of the multi-ply paper and capable of shortening the downtime caused by exchange of the papermaking press rolls relating to the papermaking rolls used in a paper machine and especially the papermaking press rolls used in a press part, and to provide a method for processing the papermaking rolls. <P>SOLUTION: The papermaking rolls are obtained by processing the surface of a base material by a rough polishing method or an applicating method and winding the processed base material on the surfaces of the papermaking rolls through an adhesive material. Furthermore, the method for processing the papermaking rolls is provided. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a papermaking roll used in a papermaking machine, and particularly relates to a papermaking press roll used in a press part, and is well separated from the papermaking press roll. In the case of multilayer paper, an effect of preventing paper peeling is also obtained. The present invention relates to a papermaking roll capable of shortening the downtime caused by replacement of a papermaking press roll, and a processing method thereof.

  In a paper machine, wet paper is formed from raw materials including water and fibers, and the formed wet paper is dehydrated while being pressed by a press part, and dried to obtain a dry paper product. At this time, in the press part, for example, in order to form a paper layer of multilayer paper, the moisture of the paper layer is removed by a papermaking press roll, but depending on the material of the papermaking press roll, surface properties, press conditions, etc., It has a great influence on the texture and texture of paper. Accordingly, the dewatering accuracy in the press part is a very important process in the production of paper (product), and there are many problems regarding the papermaking press roll used in the press part.

  The papermaking press roll is a pair of papermaking top press roll and papermaking bottom press roll. Usually, the paper machine has multiple papermaking press parts, and gradually passes through the presspart. The paper layer is dehydrated. In addition, a specific dehydration method for the press part is that a wet paper that is formed from a raw material and contains a large amount of moisture is passed between a pair of paper press rolls that are pressed while being held on the felt. Dehydration is carried out by transferring the moisture of the water to the felt side.

  According to this configuration, since one side (lower surface) of the wet paper is held by the felt, it is not in contact with the bottom press roll for papermaking through the felt, but the other side (upper surface) of the wet paper is the top for papermaking. It will be in direct contact with the press roll.

  In addition, when sending wet paper from the press roller to the press roller or the next process, the wet paper is peeled off from the felt, and the wet paper is transferred directly to the roll of the next process. It is necessary to peel off at a predetermined position. Therefore, in order to facilitate peeling, a natural granite roll has been used for the top press roll for papermaking. In addition, a resin-made or rubber-made roll that is softer than the paper-making top roll has been used for the paper-making bottom press roll.

  Natural granite rolls have many advantages because the surface can be finished in a mirror-like shape, so that the surface of the paper can be smooth, and because the surface hardness is high, it is durable. However, when there are concerns about roll breakage due to higher speeds and higher temperatures of paper machines, the use of granite, which is a natural resource, will lead to resource depletion, making it difficult to obtain granite itself in a few years. It was expected to be.

  As an alternative to natural granite, synthetic stones made by mixing hard resin or hard rubber with particles such as granite or dredged sand have been proposed and used (for example, see Patent Document 1).

  Further, a double felt press has been proposed as another means for increasing the dewatering efficiency in the press part. This is configured to press with a suction roll and a grooved press bottom roll, and dehydrate from the wet paper through two felts, so that the hardness of the grooved press bottom roll is lower than the hardness of the suction roll. Further, the surface of the grooved press bottom roll is formed of a rubber layer (see, for example, Patent Document 2).

  On the other hand, in the press part, paper separation failure is a problem. As shown in FIG. 6, the paper separation failure means that the wet paper (11) pressed against the paper making top press roll (9) and the paper making bottom roll (10) passes the pressure point (12). It peels from the top press roll for papermaking (9) and is held on the felt (13) and proceeds to the next process. However, it does not peel off even after passing the part to be peeled (14), and the top press roll for papermaking (9 ) Is a phenomenon that attracts and rotates while attached to the surface. Such a paper separation failure is a problem with a roll through which wet paper containing water of 40% or more passes on a paper machine, other than the papermaking press roll used in the press part.

As one means for improving this paper separation failure, a roll having a ceramic film formed on the surface of the roll has been proposed. This forms an undercoating layer made of, for example, an alloy of 95% Ni-5% Al on the surface of a roll shell made of cast steel constituting the press roll body for papermaking. On top of that, ceramic powder formed by adding 13% or more of TiO ₂ (titanium dioxide) to Al ₂ O ₃ (alumina) or ceramic powder containing TiO ₂ as 100% to form a ceramic spray coating is used. It is a press roll (see, for example, Patent Document 3).

  Further, as another means for improving the paper separation failure, a method of making paper while always applying a chemical solution to a papermaking press roll has been proposed. This is because the wax spreads uniformly on the surface of the papermaking press roll by continuously supplying and supplying a certain amount of wax as a paper separation improver to the surface of the rotating papermaking press roll. Thus, the paper separation is improved (for example, see Patent Document 4).

  On the other hand, for a roll through which wet paper whose water content is less than 40% passes, for example, a roll in a drying process, the roll is exchanged due to factors such as dirt and scratches.

JP 50-090704 A Japanese Patent Laid-Open No. 08-013372 Japanese Patent Laid-Open No. 10-219581 JP 2000-345489 A

  However, the synthetic stone proposed in Japanese Patent Application Laid-Open No. 50-090704 is inferior to the natural granite roll in terms of surface smoothness and water retention. It becomes difficult to separate the paper, resulting in defects such as running out of paper.

  Further, the double felt proposed in Japanese Patent Application Laid-Open No. 08-013372 has a dewatering power that is improved as compared with a case where a felt is held only on one surface of a wet paper and is dehydrated by pressurizing with a general papermaking press roll. However, if priority is given to paper releasability, the applied pressure may decrease depending on the felt material, and the paper releasability and dewatering power cannot be achieved at the same time.

  In addition, the papermaking press roll formed with the ceramic film proposed in Japanese Patent Laid-Open No. 10-219581 requires a separate process for forming a ceramic film on the surface by a thermal spraying method. Compared to the manufacturing cost, the price is high, and there is a concern that the manufacturing cost will be high particularly for products manufactured in a small lot. In addition, the number of days required for reworking and rewinding becomes longer, and there remains a problem in shortening the number of working days.

  In addition, the chemical solution applying means proposed in Japanese Patent Application Laid-Open No. 2000-345489 requires a fine adjustment to the amount of the chemical solution applied because the amount of the chemical solution applied greatly affects the paper releasability, and the amount applied is too small. If the amount of application is too large, there is a concern about the influence on wet paper. Further, the felt is liable to be contaminated with the chemical solution, and as a result, the dehydration power may be reduced.

  Furthermore, when manufacturing paper types with different paper layer structures, such as two-layer paper and three-layer paper, especially on a long-sheet paper machine, the number of paper press rolls required for that type increases costs. It becomes. In addition, since the papermaking press roll needs to be replaced every time the paper quality is changed, the downtime becomes longer. In the case of multilayer paper, only the upper layer does not leave the paper from the roll, causing delamination between the paper layers in the multilayer paper.

  In addition to the actual papermaking work, when examining the surface material specifications of papermaking press rolls, there is no other way than to purchase several types of expensive papermaking press rolls and test the surface suitability. Productive costs increase due to the cost associated with introduction and downtime associated with replacement work.

  In addition, in the paper machine, in addition to the papermaking press roll used in the press part, the roll is also used in the part where the wet paper whose moisture is less than 40% passes, and the replacement work due to dirt or scratches on the roll. Therefore, the downtime becomes long.

  The present invention aims to solve the above-mentioned problems. Specifically, the surface of the synthetic polymer material is processed to a desired roughness, and the processed synthetic polymer material is adhered to the surface of the papermaking roll. It aims at providing the roll for papermaking wound through a material, and its processing method.

  The papermaking roll in the present invention is characterized in that an adhesive layer is formed on the surface of the papermaking roll, and an upper layer having a synthetic polymer material is formed on the adhesive layer.

  The papermaking roll of the present invention is characterized in that the upper layer has a multilayer structure, the outermost layer of the upper layer is formed of a synthetic polymer material, and the layers are fixed with an adhesive.

  The papermaking roll in the present invention is a papermaking press roll.

  The papermaking roll in the present invention is characterized in that it is selected from any one of a resin, sponge or synthetic rubber having a synthetic polymer material thickness of 0.03 mm to 5.0 mm.

  The papermaking roll according to the present invention is characterized in that the surface hardness of the synthetic polymer material is A30 to A100.

  The papermaking roll in the present invention is characterized in that the synthetic polymer material has a surface roughness Ry of 5 μm to 70 μm.

  The processing method of the papermaking roll in the present invention is characterized in that an adhesive layer is formed on the surface of the papermaking roll, and a sheet-like synthetic polymer material is wound on the adhesive layer.

  The processing method of the papermaking roll in the present invention includes forming an adhesive layer on the surface of the papermaking roll, winding a sheet-like synthetic polymer material on the adhesive layer, and overlapping portions of the sheet-like synthetic polymer material It is characterized by forming by removing.

  In a paper machine, depending on the properties of the paper to be manufactured, the surface of a sheet or thin metal plate is pasted with a material of the required thickness such as resin, sponge, synthetic rubber, etc. It is possible to obtain a papermaking roll having an optimum surface by film polishing or the like, and it is possible to achieve both improvement in dewatering power and improvement in paper releasability.

  In particular, in the case of multi-layer paper production, the surface roughness of the top roll in the press part for papermaking is affected by the peelability of the paper, especially the peeling of only the upper layer, but according to this method, the surface roughness was different. Various types of top rolls can be easily replaced, and press conditions can be determined in a short time.

  A cheap resin film, sheet or metal plate is used as the base material, and a synthetic polymer material made of resin or synthetic rubber is bonded with an adhesive, and it is only necessary to rewind it to an existing paper roll. There is no need to purchase new artificial stone rolls or resin rolls. Further, it is not necessary to provide an expensive chemical coating apparatus for improving paper separation, and it is possible to reduce the cost because system maintenance is unnecessary.

  It is not necessary to replace the paper roll for each paper quality change. Instead, it can be applied simply by rewinding a synthetic polymer material suitable for the paper quality. The burden of is also reduced.

  It is not necessary to replace the paper roll due to dirt, scratches, etc., and it can be applied simply by rewinding a new synthetic polymer material. Therefore, the downtime associated with the paper roll replacement can be shortened, reducing the burden on workers. Is done.

  An inexpensive resin film, sheet or metal plate is used as the base material, and a surface material made of resin or synthetic rubber is bonded with an adhesive, and a generally available material that is generally available is used. This makes it possible to receive a stable material supply.

  When examining the specifications of the surface material of paper rolls, it is not necessary to purchase several types of expensive paper rolls with different surface materials, and several surface materials can be changed in a short time in the actual production line. It is possible to determine the quality and suitability, and it is possible to select the most suitable base material and surface material from many surface materials according to the characteristics of the paper quality to be manufactured. As a result, even in a high-speed paper machine, it is possible to select the optimum surface material of the paper roll in a short time, and it is possible to make a paper having the same structure as the conventional one and excellent in paper separation.

  Further, as an advantage of a paper manufacturer, it is possible to easily confirm the effect on an actual production line without performing roll replacement, so that an optimum material can be recommended to the paper manufacturer.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a process of winding a synthetic polymer material around the surface of a papermaking press roller by the rough polishing method according to the present invention. FIG. 2 shows a step of winding a synthetic polymer material around the surface of a papermaking press roller by the sticking method according to the present invention. FIG. 3 shows the surplus portion after the polished synthetic polymer material or the substrate with the synthetic polymer material is wound around the papermaking press roll in the present invention. FIG. 4 shows the joining state of the base material after the surplus portion in the present invention has been excised. FIG. 5 shows the procedure of the rough polishing method and the sticking method in the present invention.

  Examples of the processing method of the surface material of the papermaking press roll include a rough polishing processing method and a pasting processing method.

  First, a rough polishing method will be described with reference to FIGS. 1, 3, 4 and 5. FIG.

  First, a temporary roll (1) having a surface length longer than that of a papermaking press roll is set on a lathe and an adhesive is applied to the entire surface of the temporary roll (1) or a double-sided tape is applied. A sheet-like synthetic polymer material (2) selected from resin, sponge or synthetic rubber (including a mixture of minerals) on the surface of a temporary roll (1) which has been made sticky with an adhesive or double-sided tape ).

  The hardness of the synthetic polymer material (2) is preferably the surface hardness A100 in the case of synthetic rubber, and the other surface hardness is A30 to A100, and the thickness is 0.03 mm to 5.0 mm in consideration of the flexibility during the winding operation. Is preferred.

Moreover, as a condition (parameter range) of the synthetic polymer material (2), the level difference (surface roughness Ry) of the core portion is 5.0 μm to 70.0 μm, and the discharge valley depth (depth) is 3.0 μm to 30. 0.0 μm, oil reservoir amount (volume) 0.03 / mm ^{3 to} 1.00 mm ³ , and water film cohesive force (surface tension) 145 dyne / cm are preferable.

  Second, grinding stone polishing, diamond polishing or film polishing is performed on the synthetic polymer material (2) wound around the temporary roll (1). Grinding with a grindstone is performed in a state where the grindstone is installed on a lathe. In this case, the roughness count is preferably in the range of # 12 to # 1000, and among these, the range of # 30 to # 100 is optimal. On the other hand, film polishing is performed with sandpaper or a film in a state where the film is installed on a lathe.

  Polishing is preferably performed so that the surface roughness Ry in the surface roughness measuring instrument is within a range of 5.0 μm to 70.0 μm, and when polished so as to be within a range of 5.0 μm to 60.0 μm. More preferable. If the surface roughness Ry is less than 5.0 μm, a paper separation failure may occur. Conversely, if the surface roughness Ry exceeds 70.0 μm, streaks may enter the surface of the paper.

  Third, the polished synthetic polymer material (3) that has been polished is removed from the temporary roll (1), and a double-sided tape is applied to the synthetic polymer material (2), or an adhesive is applied by spraying or roll transfer. Then, one surface of the polished synthetic polymer material (3) that is not subjected to surface treatment is made sticky.

  Fourthly, the polished synthetic polymer material (3) is wound around the outer periphery of the papermaking press roll (4) while the adhesive surface is adhered to the surface of the papermaking press roll (4). The structure of the papermaking press roll in this case is a multilayer structure in which the outermost layer is formed of a synthetic polymer material in the order of the papermaking press roll, the adhesive layer, and the polished synthetic polymer material from the inside.

  Fifth, as shown in FIG. 3, if there is an excess part (7), it is cut out with a cutter or the like. The surplus portion (7) is a portion that overlaps when the polished synthetic polymer material (3) is wound around the papermaking press roll (4).

  Sixth, as shown in FIG. 4, the ends of the polished synthetic polymer material (3) are bonded and finished so as to be joined. The bonded portion (8) is formed by overlapping and cutting the polished synthetic polymer material (3) so that no gap is generated, and cutting and bonding the overlapping portions. The bonded portion of the polished synthetic polymer material (3) is preferably cut and bonded in a direction opposite to the rotational direction of the papermaking press roll (4). This is to make it difficult to peel off the polished synthetic polymer material (3) from the rotating papermaking press roll (4) when the paper machine is operated.

  Next, the pasting method will be described with reference to FIGS. 2, 3, 4, and 5.

  First, an adhesive is applied to either the front or back side of the substrate (5) selected from a film, sheet, metal plate, etc. by a roll transfer method, a blade method, or a spray method, and a resin, sponge, or synthetic material A sheet-like synthetic polymer material (2) such as rubber is bonded together to produce a substrate (6) with a synthetic polymer material.

  The hardness of the synthetic polymer material (2) is preferably a surface hardness A30 to A100, and the thickness is preferably 0.03 mm to 5.0 mm in consideration of flexibility during the winding operation.

Moreover, as a condition (parameter range) of the synthetic polymer material (2), the level difference (surface roughness Ry) of the core portion is 5.0 μm to 70.0 μm, and the discharge valley depth (depth) is 3.0 μm to 30. 0.0 μm, oil reservoir amount (volume) 0.03 / mm ^{3 to} 1.00 mm ³ , and water film cohesive force (surface tension) 145 dyne / cm are preferable.

  It is preferable to use a solvent-based adhesive.

  The condition of the synthetic polymer material (2) to be selected is preferably a surface roughness Ry of 5.0 μm to 70.0 μm in order to obtain paper separation without affecting the surface quality of the paper. The thickness is preferably 0.03 mm to 5.0 mm in consideration of flexibility during the winding operation.

  Second, a double-sided tape is applied to the back surface of the substrate with synthetic polymer material (6), or an adhesive is applied by a roll transfer method, a blade method or a spray method. Make one side non-surface treated with tackiness.

  As the adhesive, an acrylic emulsion type is used. The conditions for adhesion are such that the thickness of the adhesive layer is preferably 0.01 mm to 0.05 mm when the surface of the object in contact with the adhesive surface is smooth, and 0.05 mm to 0.5 mm in the case of a porous or irregular surface. The coating amount of is preferable.

  Thirdly, the base material (6) with a synthetic polymer material is wound around the outer periphery of the papermaking press roll (4) while sticking the tacky surface to the surface of the papermaking press roll (4). The structure of the papermaking press roll at this time is a multilayer in which the outermost layer is formed of a synthetic polymer material in the order of a papermaking press roll, an adhesive layer, a substrate, an adhesive layer, and a synthetic polymer material from the inside. It becomes a structure.

  Fourth, as shown in FIG. 3, if there is an excess part (7), it is excised with a cutter or the like. An excessive part (7) is a part which overlaps, when the base material (6) with a synthetic polymer material is wound around the papermaking press roll (4).

  Fifth, as shown in FIG. 4, the both ends of the base material (6) with the synthetic polymer material are bonded together and finished. The joint portion (8) is formed by stacking and stacking the base material (6) with a synthetic polymer material so that no gap is generated, and cutting and overlapping the overlapping portions. The bonded portion of the polished synthetic polymer material (3) is preferably cut and bonded in a direction opposite to the rotational direction of the papermaking press roll (4). This is to make it difficult to peel off the polished synthetic polymer material (3) from the rotating papermaking press roll (4) when the paper machine is operated.

  The surface roughness Ry of the synthetic polymer material (2) is set to 5 μm to 70 μm. However, depending on whether there is a problem of delamination, the surface roughness is suitable depending on whether there is a single layer or multiple layers in the paper machine. Ry is different. That is, in the case of a single layer, the surface roughness Ry is determined only from the viewpoint of paper separation between the wet paper and the roll, whereas in the case of multilayer, in addition to the paper separation between the wet paper and the roll, It is necessary to determine the surface roughness Ry from both sides in terms of delamination. Considering this, in order to prevent delamination, it is necessary to improve the paper separation from the roll, and it can be said that the surface of the multilayer needs to be rougher than the single layer. In this case, the surface roughness Ry is more preferably 50 μm to 70 μm.

  As the processing method of the surface material of the papermaking press roll (4), the rough polishing processing method and the sticking processing method have been described, but it is not necessary to remove the papermaking press roll (4) from the papermaking machine. It is an advantage that the substrate with synthetic polymer material (6) only needs to be wound around the papermaking press roll (4).

  However, it is also possible to remove the papermaking press roll (4) from the papermaking machine and process the surface material. In that case, a double-sided tape is first applied to the papermaking press roll (4), or the back surface of the synthetic polymer material (2) selected from resin, sponge, synthetic rubber (including a mixture of minerals), etc. Apply adhesive and wrap. Thereafter, the papermaking press roll (4) is placed on a lathe and polished with a grindstone. There is also a method of setting the papermaking press roll (4) on the paper machine after the polishing is completed. However, in consideration of the downtime and the burden on the operator, the above-described rough polishing method or pasting method is used. Is preferred.

  Embodiments of the present invention will be described below with reference to the drawings. Example 1 gives an example of a method of wrapping a synthetic polymer material for rough polishing on a papermaking press roll in the case of producing multilayer paper with a long paper machine, and Example 2 shows multilayer paper with a long paper machine. An example will be given of a method of winding a synthetic polymer material for pasting on a papermaking press roll in the case of manufacturing a paper.

  A method for winding a sheet-like PET film processed by a rough polishing method around a paper roll (4) using PET film as the synthetic polymer material (2), selecting film polishing as the polishing method, and FIG. This will be described with reference to FIGS. 3, 4 and 5.

  First, a temporary roll (1) having a surface length longer than that of the papermaking press roll (4) was set on a lathe, and a double-sided tape was wound around the back surface of the sheet-like PET film. A PET film having a thickness of 0.3 mm, which becomes the synthetic polymer material (2), was wound around the surface of the temporary roll (1) that was made sticky with a double-sided tape. After winding, the overlapping part of the PET film was cut out with a cutter, and bonded so that there was no overlap or gap in the joint.

  Secondly, film polishing was performed on the PET film wound around the temporary roll (1). For film polishing, a polishing jig with # 30 sand paper is set in a bite feeding device so that the average value of the surface roughness Ry in the surface roughness measuring instrument within the effective surface length of the roll is 70.0 μm. Polished.

  Third, the polished PET film after polishing is removed from the temporary roll (1), the adhesive material is once washed with alcohol, and then a double-sided tape is pasted on the back surface of the polished PET film. The surface not subjected to surface treatment was given tackiness.

  Fourthly, a polished PET film was wound around the outer periphery of the papermaking press roll (4) while sticking the adhesive surface to the surface of the papermaking press roll (4).

  Fifth, as shown in FIG. 3, the surplus portion (7) of the polished PET film was cut off with a cutter. The surplus portion (7) is a portion that overlaps when the polished PET film is wound around the papermaking press roll (4).

  Sixth, as shown in FIG. 4, both ends of the polished PET film were bonded to finish. The joined portion (8) was laminated by cutting and overlapping the polished PET film so that no gap was generated, and the overlapping portion was cut out and bonded.

  Seventh, the papermaking press roll (4) wrapped with the polished PET film is operated under pressure, and the whole is conditioned by press-bonding. After running-in for about 30 minutes, the paper is passed as usual. Three-layer paper was manufactured.

  Eighth, when paper quality was changed after papermaking, the polished PET film was peeled off, washed lightly with alcohol and water, and then papermaking was performed as usual in the original roll state.

  Regarding a method of winding a urethane sponge processed by a sticking method using a PET film as a substrate (5) and a urethane sponge as a sheet-like synthetic polymer material (2) around a press roll for papermaking (4) 2, FIG. 3, FIG. 4 and FIG.

  First, a solvent-based adhesive is spray-applied to one side of a PET film, which is a base material having a thickness of 0.3 mm, and urethane having a thickness of 0.8 mm and a surface roughness Ry of 70.0 μm is applied to the surface on which the adhesive is applied. A sponge was attached to produce a PET film with a urethane sponge.

  Second, a spray device composed of a compressor, stirrer, pressure reducing valve, hose, and nozzle is set with a 0.3 mm thick PET film with urethane sponge in a drive device composed of a roll group and a drive unit. An acrylic emulsion type adhesive was applied to the back surface of the PET film with urethane sponge (the surface on which the urethane sponge was not bonded). In the state set in the driving device, a release paper coated with silicon on one side was pasted on the surface coated with the adhesive to protect the adhesive surface.

  Thirdly, the urethane sponge is made to be parallel to the running surface of the papermaking press roll (4) while the adhesive surface of the PET film with urethane sponge is adhered to the surface of the papermaking press roll (4). An attached PET film was wound. The papermaking press roll (4) was rotated, and affixed until the PET film with urethane sponge overlapped while peeling the release paper.

  Fourth, as shown in FIG. 3, the surplus portion (7) of the PET film with urethane sponge was excised with a cutter or the like. An excess part is a part which overlaps, when a PET film with urethane sponge is wound around the papermaking press roll (4).

  Fifth, as shown in FIG. 4, the two ends of the PET film with urethane sponge were bonded together to finish. The joining part (8) was laminated by cutting together PET films with urethane sponge so as not to cause a gap, and the overlapping part was excised and pasted together.

  Sixth, the papermaking press roll wrapped with a PET film with urethane sponge is operated under pressure, and the whole is acclimated by pressure bonding. After running-in for about 30 minutes, the paper is passed through as usual. A layer paper was produced.

  Seventh, when paper quality was changed after papermaking, the PET film with urethane sponge was peeled off, washed lightly with alcohol and water, and then papermaking was carried out as usual in the original roll state.

  In the best mode and embodiments for carrying out the invention, an example in which a ground synthetic polymer material or a substrate with a synthetic polymer material is wound around a papermaking press roll is shown, but it is limited to a press roll. However, all the rolls used in the paper machine can be used, and the surface processing method and the surface processing conditions are adjusted according to the part of the roll to be used.

  Further, in the best mode and embodiment for carrying out the invention, the case of producing a three-layer paper with a long net paper machine has been described, but the present invention is not limited to this, and the roll in the circular net paper machine is described. However, it is also possible to cope with this, and it is also possible to produce a single-layer paper, two-layer paper, four-layer paper or more.

It is a figure which shows the process of winding a synthetic polymer material around the surface of the papermaking press roller by the rough polishing method in the present invention. It is a figure which shows the process of winding a synthetic polymer material around the surface of the press roller for papermaking by the sticking method in this invention. It is a figure which shows the surplus part after winding the ground synthetic polymer material or the base material with a synthetic polymer material around the papermaking press roll in this invention. It is a figure which shows the joining state of the base material after excising the excess part in this invention. It is a figure which shows the procedure of the rough grinding | polishing processing method and sticking processing method in this invention. It is a figure which shows the state of paper separation failure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Temporary roll 2 Synthetic polymer material 3 Polished synthetic polymer material 4 Paper-making press roll 5 Base material 6 Base material 7 with synthetic polymer material Excess part 8 Joining part 9 Top press roll 10 for paper making Bottom press roll 11 for paper making Wet paper 12 Pressing point 13 Felt 14 Point to be peeled off

Claims (7)

A papermaking roll, wherein an adhesive layer is formed on a surface of the papermaking roll, and an upper layer having a synthetic polymer material is formed on the adhesive layer. The papermaking roll according to claim 1, wherein the upper layer has a multilayer structure, the outermost layer of the upper layer is formed of a synthetic polymer material, and the layers are fixed with an adhesive. The papermaking roll according to claim 1 or 2, wherein the papermaking roll is a papermaking press roll. 4. The papermaking according to claim 1, wherein the synthetic polymer material is selected from any one of a resin, a sponge, and a synthetic rubber having a thickness of 0.03 mm to 5.0 mm. Rolls. The paper roll according to claim 1 or 4, wherein the synthetic polymer material has a surface roughness Ry of 5 µm to 70 µm. An adhesive layer is formed on the surface of the papermaking roll,
A method for processing a papermaking roll, comprising forming a sheet-like synthetic polymer material on the adhesive layer. An adhesive layer is formed on the surface of the papermaking roll,
A sheet-like synthetic polymer material is wound on the adhesive layer,
A method for processing a paper roll, wherein the overlap portion of the sheet-like synthetic polymer material is removed.

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