EP1596000A1 - Procede permettant d'appliquer par aspersion un agent anti-taches sur la toile d'une machine a papier, et dispositif d'aspersion coulissant et agent anti-taches utilise a cet effet - Google Patents

Procede permettant d'appliquer par aspersion un agent anti-taches sur la toile d'une machine a papier, et dispositif d'aspersion coulissant et agent anti-taches utilise a cet effet Download PDF

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Publication number
EP1596000A1
EP1596000A1 EP03768279A EP03768279A EP1596000A1 EP 1596000 A1 EP1596000 A1 EP 1596000A1 EP 03768279 A EP03768279 A EP 03768279A EP 03768279 A EP03768279 A EP 03768279A EP 1596000 A1 EP1596000 A1 EP 1596000A1
Authority
EP
European Patent Office
Prior art keywords
canvas
antipollution agent
spraying
antipollution
paper
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP03768279A
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German (de)
English (en)
Other versions
EP1596000A8 (fr
Inventor
Kunio c/o MAINTECH CO. LTD. SEKIYA
Hiroshi c/o MAINTECH CO. LTD. SEKIYA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maintech Co Ltd
Original Assignee
Oji Paper Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oji Paper Co Ltd filed Critical Oji Paper Co Ltd
Publication of EP1596000A1 publication Critical patent/EP1596000A1/fr
Publication of EP1596000A8 publication Critical patent/EP1596000A8/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/30—Protecting wire-cloths from mechanical damage
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/32—Washing wire-cloths or felts

Definitions

  • the present invention relates to a method of spraying antipollution agent to a canvas of a paper machine, a spray nozzle used therein and antipollution agent.
  • a dry part (a dry step) of a paper machine is positioned at an extremely important portion in a paper making process.
  • the paper In the dry part of the paper machine, the paper is generally dried in such a manner as to wind the paper around surfaces of a plurality of heated drier rolls.
  • a canvas is generally provided in order to press the paper to the surfaces of the drier rolls from an outer side of the paper so as to increase drying efficiency.
  • Fig. 1 is a schematic view showing one example of a used mode of the canvas in the dry part of the paper machine (an upper canvas is partly omitted for simplifying).
  • One canvas A is provided in each of upper and lower sides per a group of about ten drier rolls R (in the case of a double canvas), and is supported by a canvas roll K, a tension roll L, a canvas drier M and the like, and forms a closed loop.
  • the paper W is pinched between the canvas A and the drier roll R and is strongly pressed to a surface of the heated drier roll R, thereby increasing the drying efficiency of the paper W.
  • a water vapor evaporated from the paper W is generally discharged to a drier pocket portion D corresponding to the space surrounded by the drier roll R and the upper and lower canvases A and the like, and is finally exhausted from an exhaust port of a hood covering the dry part on the basis of the ventilation of the drier pocket portion D.
  • the ventilation is executed by injecting a hot air through the canvas by a hot air roll, a hot air duct or the like, however, is affected by air permeability of the canvas.
  • a canvas having suitable air permeability is selectively used.
  • the air permeability of the canvas is important.
  • the paper powder, the pitch or the like enters into an air gap of a weaving of the canvas (a so-called canvas texture) and clogs the texture so as to reduce the air permeability of the canvas, so that the drying efficiency of the paper is significantly lowered.
  • the paper powder, the pitch or the like transferred to the outer surface of the canvas is further transferred to rolls brought into contact with the outer surface of the canvas from the outer surface of the canvas.
  • the rolls brought into contact with the outer surface of the canvas mean a tension roll L, a canvas drier M or the like in Fig. 1, and an outer canvas roll N existing in an outer surface side of the canvas in the canvas roll K is included (the rolls brought into contact with the outer surface of the canvas are collectively called as an out roll in the present specification) .
  • the paper powder, the pitch or the like is transferred in sequence to the out roll via the canvas, the paper powder, the pitch or the like are combined with each other on the surface of the out roll, and progressively forms a large block.
  • the block forming a certain level of size is peeled from the surface of the out roll, and is conversely transferred to the outer surface of the canvas.
  • antipollution agent preventing the paper powder, the pitch or the like from being transferred to the canvas from the paper is generally applied to the canvas.
  • the liquid drop of the antipollution agent is easily blown away by a surface layer air current (an accompanying air current) caused by the movement of the canvas, the liquid drop does not reach the canvas surface, and a yield ratio is deteriorated.
  • the blown away liquid drop is attached to the member or the like of the paper machine so as to become large in the surface thereof, comes down on the paper as the liquid drop (so-called drop in a lump), whereby there is a case that quality of the paper product is significantly deteriorated.
  • the antipollution agent is clogged in the texture of the canvas, or the canvas gets wet so as to be cogged by the paper powder or the like without the antipollution agent being property applied to the canvas, so that the drying efficiency of the paper has been significantly lowered.
  • the inventors of the present invention have proposed a method of temporarily applying the antipollution agent to the out roll of the canvas and applying a suitable amount of antipollution agent to the canvas via the out roll, in order to overcome the various kinds of problems mentioned above (refer to patent document 1 and patent document 4).
  • the antipollution agent tends to be more diffused to a portion near an end portion of the out roll, so that there is a case that it is not necessarily easy to uniformly diffuse to an entire surface of the out roll.
  • the long type diffusion nozzle and the slidable type diffusion nozzle can uniformly diffuse to the entire surface of the out roll by optionally determining a number and a sliding width of the nozzle.
  • the two-fluid nozzle is generally employed as the spray nozzle.
  • the inventors of the present invention has proposed a fluid diffusing fluid scattering prevention apparatus which forms an air curtain in an upstream side and a downstream side of the chemical injecting nozzle and shuts off the surface layer air current so as to spray the chemical by the space therebetween, as an apparatus for preventing the chemical from being rolled up mentioned above (refer to patent document 5).
  • the canvas is a member playing an important part in the drying of the paper which affects largely quality of the paper product, however, since the canvas is directly brought into contact with the paper, the paper powder, the pitch or the liketendstobetransferred. Accordingly, if the canvas is polluted, the drying efficiency of the paper is significantly lowered.
  • the antipollution agent is applied to the canvas, however, unless the chemical is applied accurately, the texture of the canvas is clogged or the canvas is got wet, so that the drying efficiency is decreased on the contrary.
  • an element making the application hard is increased year by year such as the speeding up of the paper speed of the paper machine, a mightiness of the surface layer air current accompanying therewith, an improvement of the canvas as mentioned above, and a condition is going to be severe.
  • the present invention is made for the purpose of overcoming the problem mentioned above against a background of the actual condition mentioned above.
  • an object of the present invention is to provide a method of spraying and applying antipollution agent which can securely apply a proper amount of antipollution agent to a canvas.
  • the other object of the present invention is to provide a diffusion nozzle and a slidable diffusion apparatus which can achieve the spraying and applying method mentioned above.
  • the other object of the present invention is to provide antipollution agent which is used in the spraying and applying method mentioned above.
  • the inventors of the present invention have found that a proper amount of antipollution agent can be sprayed without being rolled up by the surface layer air current of the canvas by spraying the antipollution agent toward a position (a contact start position) at which the outer surface of the canvas going around the closed loop mentioned above is first brought into contact with the out roll such as the tension roll, the outer canvas roll from the spray nozzle, and have completed the present invention on the basis of the knowledge.
  • a method of spraying and applying antipollution agent of applying antipollution agent to a canvas used for drying paper in a paper machine comprising the steps of:
  • the said out roll is constituted by an out roll which is first brought into contact with after the canvas is apart from the paper.
  • antipollution agent spraying method wherein the antipollution agent is sprayed while sliding the said spray nozzle in parallel to a rotation shaft of the out roll of the canvas.
  • the said canvas is constituted by a canvas in which air permeability is equal to or less than 20000 cm 3 /cm 2 /min.
  • a slidable spray apparatus with a spray nozzle used in antipollution agent spraying method described in the item (3) wherein said spray nozzle is provided with a two-fluid nozzle for spraying a fluid and an air current injection nozzle for injecting an air current, the air current is injected from the air current injection nozzle to the liquid sprayed from the two-fluid nozzle, and is constituted by a two-fluid nozzle with a secondary blow accelerating and spraying the sprayed fluid by the air current.
  • a slidable spray apparatus wherein the said slidable spray apparatus slides the spray nozzle on the basis of a slidable width set by a limit switch.
  • antipollution agent sprayed in accordance with the spraying and applying method described in the item (1), wherein the antipollution agent is constituted by an emulsion including any one or both of oil and wax.
  • antipollution agent sprayed in accordance with the spraying and applying method described in the item (1), wherein the antipollution agent is constituted by an emulsion including a silicone oil.
  • antipollution agent sprayed in accordance with the spraying and applying method described in the item (1), wherein the antipollution agent is constituted by an emulsion including a modified silicone oil.
  • the present invention can of course employ a structure obtained by combining two or more selected from the items (1) to (10) mentioned above, as far as it corresponds to the object.
  • Fig. 2 is a view explaining a contact start position between an outer surface of a canvas and an out roll.
  • Fig. 3 is a schematic view showing a state in which antipollution agent is sprayed toward the contact start position from a spray nozzle as seen from a side.
  • the spraying method of the antipollution agent in accordance with the present invention is characterized in that antipollution agent T is sprayed toward a contact start position C between an outer surface of a canvas A and an out roll B while sliding a spray nozzle S.
  • the contact start position C corresponds to a position at which the outer surface of the canvas A going around a closed loop is first brought into contact with the out roll B, and corresponds to slash hatching position in Fig. 2.
  • the canvas A moves at high speed toward a lower side from an upper side, and the out roll B rotates at high speed in correspondence to the movement of the canvas A.
  • a surface layer air current is generated in a direction an outline arrow in Fig. 3 near the surface of the canvas A, and the surface layer air current is generated in a direction of a dotted arrow in Fig. 3 near the surface of the out roll B.
  • the antipollution agent T is sprayed to the contact start position C from the spray nozzle S.
  • the antipollution agent T is carried by both the surface layer air currents of the canvas A and the out roll B so as to be sprayed.
  • the antipollution agent T is focused by both the surface layer air currents in a spray state, and can accurately reach the contact start position C.
  • the antipollution agent T is efficiently applied without being scattered in a wide range.
  • the antipollution agent T When spraying at a conventional spray position Sa, the antipollution agent T is cut off by the surface layer air current (the dotted arrow) of the out roll B, and a part of the antipollution agent T is rolled up, so that the antipollution agent T is not efficiently applied to the out roll B.
  • the antipollution agent T is sprayed in a collision region between the surface layer air current of the out roll B and the surface layer air current of the canvas A, the surface layer air current is conversely utilized positively.
  • the spray state is focused, and it is possible to make the antipollution agent T to reach the contact start position C without being rolled up.
  • a method of spraying and applying antipollution agent in accordance with the present invention is structured such as to spray the antipollution agent toward the contact start position between the outer surface of the canvas and the out roll from the spray nozzle mentioned above, make the antipollution agent to be attached to the out roll and apply the antipollution agent to the canvas by utilizing the matter that this antipollution agent is transferred to the canvas from the out roll.
  • the canvas A is brought into pressure contact with a plurality of drier rolls R heated, for example, at about 80 to 100 °C via the paper W, and on the other hand, is directly heated and dried by a canvas drier M.
  • the canvas A travels in a high temperature state, and a tension roll L and an outer canvas roll N (that is, an out roll) brought into contact therewith are always transferred a heat from the drier roll R and the canvas drier M via the canvas A, and rotate in a high temperature state.
  • a tension roll L and an outer canvas roll N that is, an out roll
  • a part of the oil film is transferred to an entire of the outer surface of the canvas A from the out roll as if paint is applied to a wall by a roller, whereby it is possible to achieve a uniform application of the oil or the like to the outer surface of the canvas (paint roller effect).
  • any canvas such as a canvas generally used in the paper machine, that is, of a plain weave, a double cloth, a triple cloth, a needle type, a spiral type, a surface layer span type or the like obtained by combining a monofilament, a multifilament and the like.
  • a method of spraying and applying antipollution agent in accordance with the present invention corresponds to a method of accurately supplement the oil or the like (the antipollution agent) of the oil film which is lost at a small amount from the surface of the out roll on the basis of the paint roller effect mentioned above by a proper amount.
  • the applying of the antipollution agent as mentioned above can be executed by using a long type spray nozzle having a plurality of nozzle ports.
  • a spray amount of the antipollution agent with respect to the out roll is changed by various kinds of factors such as paper speed, a material and a width of the canvas, a number of the out roll, a kind of the paper product, a number and a temperature of the drier roll held by said canvas, and the like.
  • the water content in the directly applied partial antipollution agent is at such a level that can be immediately dried by being brought into contact with the out roll, the canvas drier, the drier roll or the like, the oil film formation on the surface of the canvas is not affected.
  • the oil of the antipollution agent transferred to the canvas from the out roll (for example, the tension roll) is carried to the canvas, and a part thereof is transferred to the paper and the other out roll (for example, the canvas drier or the outer canvas roll) so as to be attached.
  • the oil attached to the other out roll forms the oil film on the surface of the roll.
  • the oil transferred to the paper is carried by the paper and is finally removed from the paper machine together with the paper.
  • the oil film is formed not only in this out roll but also in the other out roll.
  • a conventional spraying and applying method (refer to Sa in Fig. 3) tends to be disturbed by the surface layer air current of the canvas or the out roll as previously mentioned, and can be actually executed only by the out roll which is in a deep drawn state such as the tension roll L (a position S5 in Fig. 4).
  • the present invention has an advantage that the present invention can be applied to any out roll.
  • (the oil of) the antipollution agent sprayed to the out roll is transferred to the other out roll via the canvas, forms the oil film so as to inhibit the out roll from being polluted, and further prevents the canvas from being polluted.
  • the antipollution agent is applied to the out roll positioned in an upstream side of a moving direction of the canvas, the antipollution agent (the oil) is transferred to the other out roll in a downstream side, whereby it is possible to effectively prevent the pollution.
  • the antipollution agent to the out roll (the outer canvas roll N in Fig. 4) which the canvas is apart from the paper and is first brought into contact with.
  • Fig. 5 is a schematic view showing an example of a structure of the slidable spray apparatus.
  • the spray nozzle is constituted by a two-fluid nozzle.
  • a slidable spray apparatus 1 is provided with a frame body 11, left and right box portions 12L and 12R, a spray nozzle S, a moving belt 13 for fixing and sliding (reciprocating movement) the spray nozzle S, a drive motor 14, left and right limit switches 15L and 15R, and the like.
  • the spray nozzle S is fixed and supported to a support body 16 raised from a support table 13a attached and fixed to the moving belt 13.
  • a liquid supply tube 17 for supplying the antipollution agent and an air supply tube 18 for blowing are attached to the spray nozzle S, and lower ends thereof are fitted and fixed to the support table 13a.
  • the liquid supply tube 17 and the air supply tube 18 are coupled to respectively corresponding tubes 17a and 18a in an inner side of the frame body 11.
  • the tubes 17a and 18a are inserted to a cable bear 19 flexibly changing its shape in correspondence to a reciprocating movement of the moving belt 13 so as to follow, and are coupled to a chemical tank, a compressor or the like (not shown) in an external portion of the apparatus through an inner side of the left box portion 12L.
  • the moving belt 13 provided in a tensional manner between a roller within the right box portion 12R and a roller driven by the drive motor 14 within the left box portion 12L (none of the rollers being illustrated).
  • the frame body 11 is provided with limit switches 15L and 15R in left and right sides, and it is possible to set a sliding width of the spray nozzle S by these limit switches.
  • this slidable spray apparatus 1 it is possible to reciprocate (slide) the spray nozzle S in a longitudinal direction of the slidable spray apparatus 1 on the basis of the sliding width set by the limit switch, by driving the drive motor 14 so as to move the moving belt 13 in a forward direction or a backward direction.
  • the flexible tubes 17a and 18a coupled to the liquid supply tube 17 or the air supply tube 18 can follow the deformation of the cable bear 19.
  • a one-fluid nozzle or a two-fluid nozzle is generally employed.
  • the one-fluid nozzle is structured such as to inject by applying a pressure to the liquid, and is characterized in that an amount of the injected liquid is much and an impact (flow speed, kinetic momentum or the like) of the liquid is great.
  • the two-fluid nozzle is structured such as to spray by extruding the liquid by a blow air, and is characterized in that the nozzle is suitable for spraying a small amount of liquid, however, the impact is comparatively small.
  • the two-fluid nozzle is used as the spray nozzle.
  • the two-fluid nozzle is appropriately selected or designed on the basis of the spray amount or the like of the antipollution agent.
  • the spraying and applying method in accordance with the present invention is structured, as previously mentioned, such as to apply the antipollution agent together with the surface layer air current of the canvas or the out roll, it is possible to sufficiently apply the antipollution agent without being rolled up even in the case of using the two-fluid nozzle.
  • a two-fluid nozzle with secondary blow can be used as the spray nozzle for making the antipollution agent to more securely reach the canvas.
  • the two-fluid nozzle with secondary blow is provided with a two-fluid nozzle for spraying the liquid (the antipollution agent), and an air current injection nozzle for injecting the air (the secondary blow), and is structured such as to inject the air current from the air current injection nozzle to the liquid sprayed from the two-fluid nozzle, and accelerate the sprayed liquid by the air current so as to spray to the canvas.
  • Figs. 6A and 6B are views showing an example of a structure of the two-fluid nozzle with secondary blow, in Fig. 6A is a perspective view and Fig. 6B is a cross sectional view along a line X-X in Fig. 6A (in Fig. 6B, the two-fluid nozzle is shown by a broken line).
  • FIG. 6B An arrow in Fig. 6B shows a flow of the secondary blow air.
  • the two-fluid nozzle 2 with secondary blow is provided with a two-fluid nozzle 3 and an air box 4, and the two-fluid nozzle 3 is fitted and fixed by screw to the air box 4 having an approximately C shape (not shown).
  • the two-fluid nozzle 3 is provided with a spray nozzle 31, a liquid injection port 32 and an air injection port 33.
  • the two-fluid nozzle 3 (the spray nozzle 31) is appropriately selected on the basis of a spray amount of the antipollution agent or the like in the same manner as the two-fluid nozzle previously mentioned so as to be used.
  • a liquid supply tube 17 (refer to Fig. 5) is screwed with the liquid injection port 32, and an air supply tube 18 is screwed to the air injection port 33, respectively via a sealing.
  • a recess portion is formed in an inner side of a side wall 41 of the air box 4, and an air current spray nozzle 42 surrounded by said side wall 41 and a side wall of the two-fluid nozzle 3 is formed.
  • a secondary blowing air supply tube 21 for supplying the air for a secondary blow is screwed with a secondary blowing air injection port 43 in a bottom portion of the air box 4 via a sealing, in place of a support body 16 in Fig. 5.
  • the secondary blowing air supply tube 21 is fitted and fixed to the support body 13a in the same manner as the liquid supply tube 17 or the like, is coupled to the tube, is inserted to the cable bear, and is coupled to the compressor or the like in the external portion of the apparatus.
  • the two-fluid nozzle 2 with secondary blow having the structure mentioned above is attached as the spray nozzle S to the slidable spray apparatus 1 shown in Fig. 5 so as to be used.
  • the compressed air passes through the secondary blowing air injection port 43, fills in the space 44, is injected from the air current injection nozzle 42 through a hole 45, and forms a secondary blow E.
  • Fig. 7 is a view showing a state in which the antipollution agent is sprayed from the two-fluid nozzle with secondary blow.
  • the two-fluid nozzle with secondary blow can make the injection of the fluid achieved by the two-fluid nozzle which is originally weak in the impact stronger in the impact.
  • antipollution agent used in a method of spraying and applying antipollution agent in accordance with the present invention there can be listed up wax, oil or an emulsion including both of them.
  • the wax and the oil tend to be oiled in the surface of the out roll so as to be diffused, and can form an oil film having a more effective water repellent, the wax and the oil can be preferably used as mold release agent.
  • the vegetable oil such as castor oil, rapeseed oil or the like has an improved fixing ability on the canvas and the out roll, and does not obstruct paper printing property
  • the vegetable oil is preferably used as the antipollution agent.
  • silicone oil forms a coat having a mold releasing property and a water repellent peculiar to the silicone oil on the surface of the canvas or the out roll
  • the silicone oil is preferably used as a main component of the antipollution agent.
  • silicone oil Various kinds of oil can be employed in the silicone oil.
  • dimethyl polysiloxane group oil (so-called "dimethyl”) is characterized in that a number of kinds is very large, and can be appropriately selected in correspondence to the used condition such as a material of the canvas, a temperature at a time of being used, or the like so as to be used, it is preferable.
  • a modified silicone oil in which a lateral chain or an end group is variously replaced by the other organic functional groups is supplied as the silicone oil on market, and is preferably used.
  • the modified silicone oil includes various kinds of modified types, for example, an amino denaturation, an epoxy denaturation, an alkoxy denaturation, a carboxy denaturation, a carbinol denaturation, a mercapto denaturation and the like, on the basis of the substituent group.
  • the modified silicone oil is divided into a side chain type, a both end type, a one end type, a side chain and both end type and the like on the basis of the replaced position, and has a peculiar characteristic in correspondence to combinations of the replaced position, the modified type mentioned above and the like.
  • the side chain type amino modified silicone oil when carrying out an experiment that the side chain type amino modified silicone oil is attached to an acryl plate and wiped out by a tissue paper, the side chain type amino modified silicone oil has a characteristic of being hard to be wiped out (which is not generally wiped out by one time and leaves the oil film) in comparison with the dimethyl (which is nearly wiped out only by wiping out once).
  • the side chain type amino modified silicone oil has a characteristic that an adhesive property (a fixing property) is strong in comparison with a plastic, and is actually adhered strongly to a synthetic fiber and a metal plate.
  • the modified silicone oil as mentioned above is used in the spraying and applying method of the antipollution agent in accordance with the present invention, the modified silicone oil which is once attached to the canvas or the out roll is strongly adhered to them and is not easily detached from them. Accordingly, the modified silicone oil is preferable.
  • modified silicone oil is accurately attached to the canvas just after starting the application of the antipollution agent and immediately forms the oil film in the out roll, on the basis of the strong adhesive property thereof, there is an advantage that it is very fast to generate the antipollution effect (so-called raising).
  • the spray amount of the antipollution agent is determined in correspondence to the condition such as the material and the width of the canvas, the number and the temperature setting of the drier roll, the kind of the manufacture paper product, the paper speed, the material and the temperature at use of the sprayed out roll, the main component (the wax, the oil, the silicone oil and the modified silicone oil) of the antipollution agent and the like, as previously mentioned.
  • the antipollution agent (the emulsion) is prepared in the following manner. (Modified) silicone oil or castor oil 10 weight % Emulsifying agent (Emulgen109P (manufactured by Kao Corporation, Polyoxyethylene Lauryl Ether, Nonionic group)) 2 weight % Water 8 weight % Total 100 weight %
  • Paper machine Ultra former (manufactured by Kobayashi Engineering Works, Ltd.) Paper Name Liner Basic Weight 160 g/m2 Paper Speed 650 m/min Paper Width 4 m Canvas Width 4.5 m
  • the air permeability of the used canvas is 16000 cm 3 /cm 2 /min.
  • the out roll is arranged as shown in Fig. 4, in the order of the outer canvas roll N, the tension roll L and the canvas drier M from an upstream side of the canvas.
  • the spray was executed for an actual working hours of fourteen days by using the slidable spray apparatus shown in Fig. 5 (in which the spray nozzle is constituted by the two-fluid nozzle), setting the spray amount of the antipollution agent to 5 cm 3 /min, and changing the sliding speed, the spray position (S1 to S6 in Fig. 4) and the kind of the silicone oil.
  • reference symbols S1, S2 and S3 show a case of spraying toward the contact start position between the outer surface of the canvas and the out roll in accordance with the present invention
  • reference symbols S4 and S5 show conventional spray positions spraying to the out roll
  • reference symbol S6 shows a case of directly spraying to the outer surface of the canvas, respectively.
  • the spray amount 5 cm 3 /min component of the antipollution agent corresponds to the spraying of the oil component 0.19 mg/m 2 in the case of setting a specific gravity of the emulsion to 1.0 g/cm 3 .
  • the sliding speed shows sliding speed of the spray nozzle.
  • reference symbols N, L and M denote the outer canvas roll N, the tension roll L and the canvas drier M in Fig. 4, respectively.
  • the sliding speed of the spray nozzle is equal to or more than 1.5 m/min.
  • the embodiment 8 the embodiment 4 and the embodiment 9 comparing a case of changing the sliding speed of the spray nozzle at the position S1 in Fig. 4 and spraying the dimethyl silicone oil (the dimethyl polysiloxane group oil), it is known that the smaller the sliding speed is, the more the dirty is attached to the canvas or the like.
  • the oil film is peeled off one after another in the portion to which the antipollution agent is not sprayed in the surface of the out roll, and the canvas can not be efficiently supplied the oil from the portion of the out roll, and the oil film can not be efficiently formed in the surface of the canvas.
  • the transfer of the paper powder, the pitch or the like from the paper is allowed, and the paper powder or the like is carried by the canvas so as to be transferred to the other out roll and the out roll is polluted.
  • the sliding speed of the spray nozzle affects to prevent the canvas or the like from being polluted.
  • the antipollution effect is better in the case of using the modified silicone oil than in the case of the dimethyl at the same sliding speed, and an improvement is acknowledged.
  • the antipollution effect was good in the positions S1 to S3 sprayed by the spraying and applying method in accordance with the present invention.
  • the antipollution effect in the position S4 is hardly confirmed because it is considered that a sufficient amount of antipollution agent did not reach the outer canvas roll N due to the violent roll-up by the surface layer air current of the canvas.
  • the antipollution agent was violently rolled up.
  • the antipollution agent (the oil, the water and the like) is absorbed on the spot even if the antipollution agent reaches the canvas, and the antipollution agent is not diffused in a surface direction.
  • the oil in the canvas portion to which the antipollution agent is not sprayed is transferred to the paper so as to be lost, and the transfer of the paper powder, the pitch or the like is conversely allowed so as to pollute (in other words, the paint roller effect at a time of spraying to the out roll can not be obtained).
  • the embodiment 1, the embodiment 5 and the embodiment 6 correspond to cases in which only the spray position of the antipollution agent by the spraying and applying method in accordance with the present invention is changed.
  • the item (1) can be easily understood from the principle of a method of spraying and applying antipollution agent in accordance with the present invention previously mentioned.
  • the item (2) can be considered to be caused by a matter that if the canvas is brought into pressure contact with the paper, a part of the oil is transferred to the paper as previously mentioned, so that the amount of the oil transferred to the out roll positioned just after it (the out roll in the upstream side mentioned above) becomes small, and the antipollution effect is slightly lowered.
  • the paper powder or the like mentioned above is generally transferred to the paper from the canvas so as to be returned during the time when the canvas goes around, and the canvas or the like is not polluted, however, it is considered that since a part of the paper powder or the like is transferred to the out roll in which the antipollution effect is slightly lowered as mentioned above so as to be trapped, the out roll is slightly polluted.
  • the dirty (the paper powder, the pitch or the like) was not confirmed in the canvas and the out roll, and the improved result could be obtained, in the same manner as the case of using the dimethyl silicone oil (the embodiment 1).
  • the present invention can solve the matter mentioned above, and can rather achieve a more excellent effect in a range of the air permeability.
  • the spray experiment for an actual working hour of fourteen days was executed by using a canvas having a different condition 25000 cm 3 /cm 2 from the canvas having the paper condition in the embodiments previously mentioned (that is, 16000 cm 3 /cm 2 /min), and setting the other conditions to be the same.
  • the spray position employs S2 (embodiment 10) and S5 (comparative embodiment 4) in the tension roll L.
  • the spraying method in accordance with the present invention can achieve an excellent effect in accordance that the air permeability becomes rather smaller, from the results of the embodiment 5, the embodiment 10, the comparative embodiment 2 and the comparative embodiment 4.
  • Embodiment 10 S2 4.5 Dimethyl ⁇ o ⁇ ⁇ ⁇ Comparative embodiment 4 S5 4.5 Dimethyl ⁇ ⁇ ⁇ ⁇ ⁇
  • the description is given mainly of the two-fluid nozzle, however, it is of course possible to use the one-fluid nozzle in some cases.
  • the present specification mainly takes up the side chain type amino modified silicone oil, however, this is one example to the end, and it is of course possible to use the oil on the basis of the other substituent group and the oil in the other substitution position.
  • the present invention can be executed for example by pressing the canvas roll from an outer side of the canvas.
  • a method of spraying and applying antipollution agent to the canvas of the paper machine, the slidable spray apparatus used therein and the antipollution agent in accordance with the present invention can be utilized in a general technical field of paper industry as far as the principle is applied, without being limited to the paper machine.

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EP03768279A 2002-12-26 2003-12-25 Procede permettant d'appliquer par aspersion un agent anti-taches sur la toile d'une machine a papier, et dispositif d'aspersion coulissant et agent anti-taches utilise a cet effet Withdrawn EP1596000A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2002376428 2002-12-26
JP2002376428 2002-12-26
PCT/JP2003/016799 WO2004059077A1 (fr) 2002-12-26 2003-12-25 Procede permettant d'appliquer par aspersion un agent anti-taches sur la toile d'une machine a papier, et dispositif d'aspersion coulissant et agent anti-taches utilise a cet effet

Publications (2)

Publication Number Publication Date
EP1596000A1 true EP1596000A1 (fr) 2005-11-16
EP1596000A8 EP1596000A8 (fr) 2006-10-25

Family

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Application Number Title Priority Date Filing Date
EP03768279A Withdrawn EP1596000A1 (fr) 2002-12-26 2003-12-25 Procede permettant d'appliquer par aspersion un agent anti-taches sur la toile d'une machine a papier, et dispositif d'aspersion coulissant et agent anti-taches utilise a cet effet

Country Status (12)

Country Link
US (1) US20060162889A1 (fr)
EP (1) EP1596000A1 (fr)
CN (1) CN1898437A (fr)
AU (1) AU2003292836A1 (fr)
BR (1) BR0317212A (fr)
CA (1) CA2511893A1 (fr)
MX (1) MXPA05006958A (fr)
NO (1) NO20053610L (fr)
RU (1) RU2329344C2 (fr)
TW (1) TW200420803A (fr)
WO (1) WO2004059077A1 (fr)
ZA (1) ZA200505123B (fr)

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RU2472011C2 (ru) * 2007-10-29 2013-01-10 Кейтерпиллар Инк. Устройство для очистки выхлопных газов
EP3128074A4 (fr) * 2014-03-31 2017-11-08 Maintech Co., Ltd. Procédé permettant une pulvérisation d'une solution chimique

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WO2014136445A1 (fr) * 2013-03-04 2014-09-12 株式会社メンテック Procédé pour pulvériser une solution chimique
CN105113316B (zh) * 2015-09-22 2017-09-05 福建省晋江优兰发纸业有限公司 一种湿法起皱生产擦手纸的方法
JP6676568B2 (ja) * 2016-03-18 2020-04-08 愛媛製紙株式会社 抄紙用ドライヤーカンバス及び抄紙用ドライヤーカンバスの汚染防止方法
CN108468247B (zh) * 2018-02-12 2019-03-22 湖北金庄科技再生资源有限公司 一种黄板纸胶粘物的减少装置和方法

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Publication number Priority date Publication date Assignee Title
RU2472011C2 (ru) * 2007-10-29 2013-01-10 Кейтерпиллар Инк. Устройство для очистки выхлопных газов
EP3128074A4 (fr) * 2014-03-31 2017-11-08 Maintech Co., Ltd. Procédé permettant une pulvérisation d'une solution chimique
US10273631B2 (en) 2014-03-31 2019-04-30 Maintech Co., Ltd. Method of spraying chemical solution

Also Published As

Publication number Publication date
CA2511893A1 (fr) 2004-07-15
NO20053610D0 (no) 2005-07-25
WO2004059077A9 (fr) 2005-08-18
WO2004059077A8 (fr) 2006-08-31
BR0317212A (pt) 2005-11-01
RU2329344C2 (ru) 2008-07-20
MXPA05006958A (es) 2006-03-10
EP1596000A8 (fr) 2006-10-25
CN1898437A (zh) 2007-01-17
AU2003292836A1 (en) 2004-07-22
RU2005120729A (ru) 2006-01-20
WO2004059077A1 (fr) 2004-07-15
US20060162889A1 (en) 2006-07-27
ZA200505123B (en) 2006-04-26
TW200420803A (en) 2004-10-16
NO20053610L (no) 2005-09-23

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