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WO2018100861A1 - Composition de pulvérisation antisalissures et son procédé de pulvérisation - Google Patents

Composition de pulvérisation antisalissures et son procédé de pulvérisation Download PDF

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Publication number
WO2018100861A1
WO2018100861A1 PCT/JP2017/035136 JP2017035136W WO2018100861A1 WO 2018100861 A1 WO2018100861 A1 WO 2018100861A1 JP 2017035136 W JP2017035136 W JP 2017035136W WO 2018100861 A1 WO2018100861 A1 WO 2018100861A1
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WO
WIPO (PCT)
Prior art keywords
spraying
antifouling
wire
felt
composition
Prior art date
Application number
PCT/JP2017/035136
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English (en)
Japanese (ja)
Inventor
関谷　宏
知徳 室矢
拓 澤田
Original Assignee
株式会社メンテック
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Publication date
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Publication of WO2018100861A1 publication Critical patent/WO2018100861A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L101/00—Compositions of unspecified macromolecular compounds
    • C08L101/02—Compositions of unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
    • C08L33/02—Homopolymers or copolymers of acids; Metal or ammonium salts thereof
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/08—Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching
    • 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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/02—Agents for preventing deposition on the paper mill equipment, e.g. pitch or slime control

Definitions

  • the present invention relates to a spraying antifouling composition and a spraying method thereof, and more particularly, to a spraying antifouling composition and a spraying method thereof for preventing pitch contamination of a running member in a wet part of a paper machine.
  • a paper machine for producing paper generally has a wet part, a dry part, and a reel part.
  • the wet part is a wet paper by placing a liquid in which pulp is dispersed in water on a paper-making net (wire) and letting the excess water drop naturally, passing the wet paper between a pair of press rollers, By pressing with a press roll, the moisture in the wet paper is transferred to the felt, thereby dehydrating the wet paper.
  • the dry part is a part that dries wet paper that has passed through the wet part by bringing the wet paper into contact with a heated cylinder to form paper.
  • the reel part is a part that winds paper on a rod called a spool.
  • the surface of a running member such as a press roll that travels in relation to the travel of the wet paper is called “pitch” due to an adhesive or a synthetic resin mixed in the wet paper (pulp).
  • pitch due to an adhesive or a synthetic resin mixed in the wet paper (pulp).
  • the wet paper newly conveyed will also be contaminated by the pitch adhering to a traveling member, As a result, a yield will fall large.
  • a contamination inhibitor containing a polyoxyethylene polyoxypropylene block polymer having ethylene oxide groups on the left and right sides of a propylene oxide group and a water-soluble polymer is known (see, for example, Patent Document 1).
  • a surfactant having a structure containing 1 to 10 moles of propylene oxide in the ethylene oxide chain is known (for example, see Patent Document 2).
  • a paper / pulp comprising a water-soluble anionic polymer having a number average molecular weight of 500 to 50,000 or an alkali salt thereof, or an aminocarboxylic acid or an alkali salt thereof having a chelating power against calcium and / or barium.
  • Manufacturing process cleaning agents are known (see, for example, Patent Document 4). Such a cleaning agent for paper / pulp manufacturing process is supplied to a manufacturing facility where scales are adhered and deposited after the operation of the paper / pulp manufacturing process is temporarily stopped. Then, the manufacturing facility is cleaned after the cleaning agent for the paper / pulp manufacturing process is supplied.
  • the antifouling agent described in Patent Document 1 has a relatively weak effect on pitch because the main component block polymer is nonionic, and it cannot be said that the antifouling effect of pitch is sufficiently excellent.
  • the paper sheet felt cleaning agent described in Patent Document 2 and the papermaking wire stain preventing agent described in Patent Document 3 both have a drawback that they are easily foamed and difficult to handle because the main component is a surfactant. In addition, once these agents are foamed, the portion that comes into contact with the pitch is reduced, so that the effect of preventing contamination becomes insufficient.
  • the cleaning agent for paper / pulp manufacturing process described in Patent Document 4 is not for spraying but is supplied into the manufacturing facility. That is, the cleaning agent for the paper / pulp manufacturing process is not applied to the manufacturing facility during the operation of the manufacturing facility (for example, while the traveling member is traveling). For this reason, when a pitch adheres to the production equipment in operation, it cannot prevent the wet paper from being contaminated. If the paper / pulp manufacturing process detergent is diverted to spraying applications, the chelating agent may trap metal ions and crystallize, causing the spray nozzle to become clogged, or itself causing pitch contamination. There is. Moreover, since the required physical properties are completely different depending on the application method, it cannot be said that the detergent for paper / pulp production process is suitable for spraying.
  • the present invention has been made in view of the above circumstances, and it is possible to sufficiently prevent pitch contamination of a traveling member during traveling in a wet part of a paper machine, and to prevent foaming and to prevent contamination, and its anti-foaming composition.
  • the purpose is to provide a spraying method.
  • the inventors of the present invention have intensively studied to solve the above-mentioned problems.
  • a stock solution containing an anionic polymer that is not usually used for preventing pitch contamination of wet parts as a main component, and an inorganic alkali agent and an inorganic salt It was found that the above-mentioned problems can be solved by diluting with water for dilution so as to have a predetermined blending ratio, and the present invention has been completed.
  • the present invention relates to (1) a spraying antifouling composition for spraying to a running member in a wet part of a paper machine to prevent pitch contamination, comprising an anionic polymer, an inorganic alkaline agent, and A spraying antifouling agent comprising a stock solution composed of a drug consisting of an inorganic salt and water for dissolution, and a dilution water for diluting the stock solution, wherein the mixing ratio of the dilution water to 100 parts by weight of the drug is 100 to 10,000 parts by weight.
  • a spraying antifouling composition for spraying to a running member in a wet part of a paper machine to prevent pitch contamination, comprising an anionic polymer, an inorganic alkaline agent, and A spraying antifouling agent comprising a stock solution composed of a drug consisting of an inorganic salt and water for dissolution, and a dilution water for diluting the stock solution, wherein the mixing ratio of the dilution water to 100 parts by weight
  • the blending ratio of the inorganic alkali agent to 1 part by mass of the anionic polymer is 0.1 parts by mass or more, and the blending ratio of the inorganic salt to 1 part by mass of the anionic polymer is 0.01 parts by mass or more.
  • the antifouling composition for spraying according to the above (1) having a pH of 9.0 or more, a surface tension of 60 mN / m or more, and a viscosity of 0.5 to 50 mPa ⁇ s.
  • the present invention resides in (3) the antifouling composition for spraying according to the above (1) or (2), wherein the weight average molecular weight of the anionic polymer is 200,000 or less.
  • the anionic polymer is at least one selected from the group consisting of polyacrylates and polysulfonates
  • the inorganic alkaline agent is sodium hydroxide, potassium hydroxide, magnesium hydroxide, water (1) to (3) above, wherein at least one selected from the group consisting of calcium oxide, sodium metasilicate and sodium silicate, and the inorganic salt is at least one selected from the group consisting of sulfate and phosphate.
  • the present invention resides in (5) the antifouling composition for spraying according to any one of the above (1) to (4), wherein the running member is a wire, felt, wire roll, felt roll or press roll. .
  • the traveling member is a wire
  • the material of the wire is nylon, urethane or polyester
  • the contact angle to the wire when the material of the wire is nylon is 65 ° or less
  • the contact angle to the wire is 90 ° or less
  • the contact angle to the wire is 85 ° or less. It exists in the antifouling agent composition for spraying as described in any one.
  • the felt material is nylon or polyester, and the felt material is nylon, the contact angle to the felt is 65 ° or less.
  • the traveling member is a press roll
  • the press roll is made of urethane or ceramic
  • the press roll is made of urethane
  • the contact angle with respect to the press roll is 90 ° or less.
  • the contact angle to the press roll is 65 ° or less
  • the present invention is (11) a spraying method in which the spraying antifouling agent composition according to any one of (1) to (4) is sprayed on a running member in a wet part of a paper machine.
  • the traveling member is felt or wire, and the traveling member has a spraying device for spraying the antifouling composition for spraying and a suction for removing the sprayed antifouling composition for spraying.
  • a box is provided along the length direction of the traveling member, and the spraying device sprayed the spraying antifouling agent composition onto the traveling member so that the spraying amount is 1 to 100 g / m 2 . Later, within at least 2 seconds, the suction box removes at least 50% or more of the spraying amount of the spraying antifouling composition.
  • the present invention is (12) a spraying method in which the spraying antifouling agent composition according to any one of (1) to (4) is sprayed on a running member in a wet part of a paper machine.
  • the traveling member is a wire roll, a felt roll or a press roll, and the traveling member is scraped with a spraying device for spraying the spraying antifouling agent composition and the sprayed antifouling composition for spraying.
  • a doctor blade for removing is provided along the circumferential direction of the traveling member, and the spraying device applies a spraying antifouling agent composition to the traveling member in an amount of 1 to 100 g / m 2. After spraying in such a manner, the doctor blade removes at least 50% or more of the spraying amount of the spraying antifouling composition within at least 2 seconds.
  • the antifouling composition for spraying of the present invention has a stock solution containing an anionic polymer as a main component and an inorganic alkaline agent and an inorganic salt, so that the traveling member during traveling in the wet part of a paper machine It is possible to sufficiently prevent pitch contamination of the traveling member.
  • the reason why the pitch contamination can be sufficiently prevented is not clear, but the pitch is peeled off from the running member based on the peeling effect by the inorganic alkaline agent, and the oily pitch is reattached based on the dispersing effect by the anionic polymer.
  • the spraying antifouling agent composition of the present invention since a drug that can be dissolved in water is used, it is difficult to precipitate, and even if it is precipitated, it is easily dissolved in water. For this reason, the antifouling composition for spraying is less likely to cause clogging of the spraying nozzle and can prevent the chemical itself from causing pitch contamination.
  • the antifouling composition for spraying of the present invention comprises an undiluted solution and diluting water, and the mixing ratio of diluting water with respect to 1 part by mass of the drug in the undiluted solution is set to 100 to 10,000 parts by mass, so Can be sufficiently reduced, and pitch contamination can be sufficiently prevented. Thereby, the antifouling composition for spraying can be used for spraying. It should be noted that the mixing ratio of the stock solution and the dilution water can be appropriately adjusted within the above range according to the spraying conditions in the spraying device and the degree of pitch contamination.
  • the spraying antifouling agent composition of the present invention since it contains an inorganic alkaline agent that is an electrolyte, the surface tension does not decrease as compared with pure water. In this case, unlike the antifouling agent composition mainly composed of a surfactant having a surface tension smaller than that of pure water, it is difficult for foaming to occur. As a result, the amount of the spraying antifouling agent composition in contact with the pitch increases, and the antifouling effect can be sufficiently exhibited.
  • the blending ratio of the inorganic alkaline agent to 1 part by weight of the anionic polymer is 0.1 parts by weight or more, and the pH of the spraying pollution control composition is 9.0.
  • the blending ratio of the inorganic salt with respect to 1 part by mass of the anionic polymer is 0.01 parts by mass or more, the surface tension is 60 mN / m or more, and the viscosity is 0.5 to 50 mPa ⁇ s. Spraying becomes possible.
  • the solubility in water is extremely improved by setting the weight average molecular weight of the anionic polymer to 200,000 or less. Further, even when an anionic polymer and an inorganic alkaline agent as an electrolyte are allowed to coexist, aggregation of the anionic polymer or the like hardly occurs, and the storage stability of the spraying antifouling agent composition is further improved.
  • the anionic polymer is polyacrylate or polysulfonate
  • the inorganic alkaline agent is sodium hydroxide, potassium hydroxide, magnesium hydroxide, calcium hydroxide, metasilicic acid.
  • sodium or sodium silicate and the inorganic salt is sulfate or phosphate, the above-described effects can be surely exhibited, and since these materials are general-purpose products, they are easily available and low in cost. Therefore, it is possible to prevent pitch contamination of the wet part.
  • the spraying antifouling agent composition of the present invention can be suitably used for a wet part of a wire, felt, wire roll, felt roll or press roll.
  • the contact angle of the spraying antifouling composition when the traveling member is a nylon wire, the contact angle of the spraying antifouling composition is 65 ° or less, and when the traveling member is a urethane wire, The contact angle of the antifouling composition for spraying is 90 ° or less, and when the running member is a polyester wire, the contact angle of the antifouling composition for spraying is set to 85 ° or less to prevent contamination for spraying.
  • the agent composition can be uniformly applied along the surface of the wire.
  • the contact angle of the spraying antifouling agent composition is 65 ° or less, and when the traveling member is made of polyester felt, By setting the contact angle of the antifouling composition for spraying to 85 ° or less, the antifouling composition for spraying can be uniformly applied along the surface of the felt.
  • the spraying antifouling composition of the present invention when the running member is a urethane wire roll, the spraying antifouling composition is made by setting the contact angle of the spraying antifouling composition to 90 ° or less. Can be uniformly applied along the surface of the wire roll.
  • the contact angle of the antifouling composition for spraying is set to 90 ° or less, whereby the antifouling composition for spraying is used. Can be uniformly applied along the surface of the felt roll.
  • the contact angle of the spraying antifouling composition is 90 ° or less
  • the running member is a ceramic press roll.
  • the contact angle of the antifouling composition for spraying is set to 65 ° or less, the antifouling composition for spraying can be uniformly applied along the surface of the press roll.
  • the above-mentioned spraying antifouling agent composition is used, so that it is possible to sufficiently prevent pitch contamination of the traveling member during traveling.
  • the spray box or doctor blade will prevent contamination for spraying within at least 2 seconds after the spraying device sprays the antifouling composition for spraying on the traveling member so that the spraying amount is 1 to 100 g / m 2.
  • FIG. 1 is a schematic view showing an example of the structure of a wet part of a paper machine in which the spraying antifouling composition according to the present invention is used.
  • (A) and (b) of FIG. 2 is explanatory drawing for demonstrating the spraying method of the pollution inhibitor composition for spraying which concerns on this invention.
  • the antifouling composition for spraying according to the present invention is for preventing pitch contamination of a traveling member traveling in connection with the traveling of wet paper in the wet part of a paper machine. According to such an antifouling composition for spraying, it is possible to prevent the adhesion of the pitch to the traveling member during traveling by spraying on the traveling member during traveling in the wet part of the paper machine, and during traveling The pitch adhering to the traveling member can be removed. Moreover, since the inorganic alkaline agent and inorganic salt which are electrolytes are contained, surface tension does not fall rather than pure water.
  • the antifouling agent composition mainly composed of a surfactant having a surface tension smaller than that of pure water, it is difficult for foaming to occur. As a result, the amount of the spraying antifouling agent composition in contact with the pitch increases, and the antifouling effect can be sufficiently exhibited.
  • the “running member” means a member that travels (moves or rotates) with the conveyance of the wet paper, and specifically, a wire, a felt, a wire roll, a felt roll, or a press roll. Is mentioned. Details of these will be described later.
  • the antifouling composition for spraying according to the first embodiment comprises a stock solution and diluting water for diluting the stock solution.
  • the antifouling composition for spraying contains the above-mentioned stock solution, and the components contained in the stock solution exhibit a function of sufficiently preventing pitch contamination of the traveling member.
  • the antifouling composition for spraying contains the diluting water, it is possible to sufficiently reduce the operational risk due to the inorganic alkaline agent during spraying.
  • distribution antifouling agent composition can be used as an inhibitor with respect to the pitch contamination for dispersion
  • spreading is demonstrated.
  • the stock solution is composed of a drug composed of an anionic polymer, an inorganic alkali agent and an inorganic salt, and water for dissolution. That is, the stock solution is a transparent aqueous solution in which a drug composed of an anionic polymer, an inorganic alkali agent and an inorganic salt is dissolved in water for dissolution.
  • the contamination inhibitor composition for spraying hardly causes clogging of the spray nozzle, and can prevent itself from causing pitch contamination.
  • examples of the anionic polymer include water-soluble polymers having a carboxyl group or a sulfone group and having anionic ionicity.
  • examples thereof include polyacrylic acid, carboxyvinyl polymer, carboxymethyl cellulose, carboxymethyl amylose, polysulfonic acid, lignin sulfonic acid, or salts thereof.
  • the anionic polymer is preferably at least one selected from the group consisting of polyacrylates and polysulfonates from the viewpoint of handleability and versatility, and more preferably a polyacrylate. preferable.
  • examples of the polyacrylate include sodium polyacrylate, potassium polyacrylate, and calcium polyacrylate.
  • examples of the polysulfonate include potassium polysulfonate, sodium polysulfonate, and calcium polysulfonate.
  • the weight average molecular weight of the anionic polymer is preferably 200,000 or less, and more preferably 20,000 to 200,000. If the weight average molecular weight of the anionic polymer exceeds 200,000, it tends to be difficult to dissolve in water as compared with the case where the weight average molecular weight is in the above range. Moreover, when it is made to coexist with the inorganic alkaline agent and inorganic salt which are electrolytes, there exists a possibility that anionic polymer may aggregate easily.
  • the concentration of the anionic polymer in the spraying antifouling composition is preferably 10 ppm by weight or more, more preferably 100 to 3000 ppm by weight, and still more preferably 1000 to 3000 ppm by weight.
  • concentration of the anionic polymer is less than 10 ppm by weight, the dispersion effect may be insufficient as compared with the case where the concentration is within the above range. That is, the peeled oily pitch may be reattached.
  • the inorganic alkaline agent is preferably at least one selected from the group consisting of sodium hydroxide, potassium hydroxide, magnesium hydroxide, calcium hydroxide, sodium metasilicate and sodium silicate.
  • the inorganic alkaline agent is more preferably sodium hydroxide or potassium hydroxide, and further preferably sodium hydroxide.
  • the concentration of the inorganic alkaline agent in the spraying antifouling composition is preferably 1 ppm by weight or more, more preferably 10 to 1000 ppm by weight.
  • concentration of the inorganic alkaline agent is less than 1 ppm by weight, the peeling effect may be insufficient as compared with the case where the concentration is in the above range.
  • dispersion effect by an anionic polymer or an inorganic salt cannot fully be exhibited.
  • the blending ratio of the inorganic alkali agent to 1 part by mass of the anionic polymer is preferably 0.1 parts by mass or more, and more preferably 0.1 to 1.0 part by mass. If the blending ratio of the inorganic alkali agent to 1 part by mass of the anionic polymer is less than 0.1 parts by mass, the peeling effect is not sufficiently exhibited. As described above, the pitch is removed after being peeled off (peeling effect) (dispersing effect). For this reason, the peeling effect is a premise of the dispersion effect and needs to be sufficiently exhibited. Incidentally, since the inorganic alkaline agent has a sufficiently small molecular weight with respect to the anionic polymer, the molar ratio is sufficiently large even if the contained mass is small.
  • the inorganic salt is preferably at least one selected from the group consisting of sulfate and phosphate, and more preferably sulfate.
  • the sulfate include ammonium sulfate, potassium sulfate, sodium sulfate, magnesium sulfate, and calcium sulfate.
  • the phosphate include ammonium phosphate, potassium phosphate, sodium phosphate, magnesium phosphate, and calcium phosphate.
  • the inorganic salt is preferably a sulfate from the viewpoint of versatility, and more preferably sodium sulfate.
  • the concentration of the inorganic salt in the spraying antifouling composition is preferably 0.1 ppm by weight or more, more preferably 1 to 100 ppm by weight. If the concentration of the inorganic salt is less than 0.1 ppm by weight, the dispersion effect may be insufficient as compared with the case where the concentration is in the above range. That is, the peeled aqueous pitch may be reattached.
  • the blending ratio of the inorganic salt to 1 part by weight of the anionic polymer is preferably 0.01 parts by weight or more, and more preferably 0.1 to 1 part by weight.
  • the blending ratio of the inorganic salt with respect to 1 part by mass of the anionic polymer is less than 0.01 part by mass, the anionic polymer becomes a physical obstacle, and the dispersion effect on the aqueous pitch is not sufficiently exhibited.
  • the dissolution water dissolves the agent composed of the above-described anionic polymer, inorganic alkali agent and inorganic salt.
  • Such dissolving water is not particularly limited, and industrial water, tap water, well water, pure water, and the like can be appropriately employed.
  • the mixing ratio of the water for dissolution at this time is not particularly limited as long as all the agents composed of the anionic polymer, the inorganic alkali agent and the inorganic salt can be dissolved.
  • the mixing ratio of dissolving water it is preferable to reduce the mixing ratio of dissolving water as much as possible. Thereby, it becomes possible to carry the stock solution easily.
  • the blending amount of the anionic polymer, the inorganic alkali agent and the inorganic salt is relatively large, variation in blending ratio among lots hardly occurs.
  • the blending relationship of the anionic polymer, the inorganic alkaline agent and the inorganic salt is determined at the time of the stock solution, there is no variation in the blending relationship even after the stock solution is diluted.
  • the dilution water is for diluting the stock solution described above.
  • Such dilution water is not particularly limited, and industrial water, tap water, well water, pure water, and the like can be appropriately employed.
  • the mixing ratio of the dilution water to 1 part by mass of the drug contained in the stock solution is 100 to 10000 parts by mass, preferably 100 to 1000 parts by mass.
  • the blending ratio of the dilution water with respect to 1 part by mass of the drug contained in the stock solution is less than 100 parts by mass, there is a problem that the operational risk due to the inorganic alkaline agent is improved when the antifouling composition for spraying is sprayed. Yes, if the mixing ratio of the dilution water to 1 part by mass of the drug contained in the stock solution exceeds 10,000 parts by mass, the effect of preventing pitch contamination may be insufficient.
  • the stock solution and the dilution water are prepared separately, and the stock solution is obtained by diluting with the dilution water. Therefore, it is possible to dilute the stock solution with diluting water immediately before the stock solution is transported to the wet part of the paper machine and sprayed onto the running members of the wet part of the paper machine to obtain a spraying antifouling composition. At this time, it is possible to appropriately adjust the blending ratio of the stock solution and the dilution water within the above range according to the spraying conditions in the spraying device, the degree of pitch contamination, and the like.
  • the spraying antifouling agent composition preferably has a pH of 9 or more, more preferably 11 or more, from the viewpoint of the effect of preventing pitch contamination. That is, it contains a large amount of an inorganic alkaline agent so that the spraying contamination inhibitor composition itself becomes highly alkaline. If the pH of the antifouling composition for spraying is less than 9, the peeling effect is not sufficiently exhibited, and pitch contamination cannot be sufficiently prevented.
  • the antifouling composition for spraying preferably has a surface tension of 60 mN / m or more, more preferably 65 to 73 mN / m.
  • the surface tension of the antifouling composition for spraying is less than 60 mN / m, foaming is likely to occur and pitch contamination may not be sufficiently prevented as compared with the case where the surface tension is within the above range.
  • the spraying antifouling composition preferably has a viscosity of 0.5 to 50 mPa ⁇ s.
  • a spray nozzle of a spraying device that is widely used. That is, there is no need for adjustments such as a special structure of the spray nozzle or a high pressure for discharge for stable spraying.
  • the blending ratio of the inorganic alkaline agent with respect to 1 part by mass of the anionic polymer and the pH of the antifouling composition for spraying are within the above range. Even in the application of spraying, it is possible to sufficiently prevent pitch contamination of the traveling member. Moreover, the dispersion
  • the antifouling composition for spraying may contain an auxiliary agent in addition to the above-mentioned drug.
  • auxiliaries include surfactants such as pH adjusters, preservatives, dispersants, viscosity adjusters, solid lubricants and the like.
  • surfactants such as pH adjusters, preservatives, dispersants, viscosity adjusters, solid lubricants and the like.
  • FIG. 1 is a schematic view showing an example of the structure of a wet part of a paper machine in which the spraying antifouling composition according to the present invention is used.
  • the wet part is a wire W, a felt F, a wire roll WR, a felt roll FR, a press roll P or the like that travels directly or indirectly depending on the travel of the wet paper X.
  • the traveling member is provided.
  • the wet part includes a wire part WP and a press part PP
  • the wire part includes an endless wire W and a wire roll WR for guiding the wire W
  • the press part PP includes an endless felt.
  • F, a felt roll FR for guiding the felt F, and a press roll P for pressing the wet paper are provided.
  • the slurry-like wet paper X in which pulp is dispersed in water is placed on the wire W and is conveyed together with the wire W.
  • the wire W has an endless shape and is rotated in a state where a certain tension is applied by the wire roll WR. As a result, excess water contained in the wet paper falls naturally.
  • the antifouling composition for spraying is sprayed onto the wire W on the side in contact with the wet paper web X by the spray nozzle S1 of the spraying device. Moreover, the antifouling agent composition for spraying is sprayed on the wire roll WR by the spray nozzle S2 of the spraying device on the wire roll WR in contact with the wire W on the side in contact with the wet paper web X. That is, the antifouling composition for spraying is sprayed onto the wire roll WR located outside the endless wire W.
  • Examples of the material of the wire W include nylon, urethane, and polyester.
  • the contact angle of the antifouling composition for spraying the wire W is 65 ° or less.
  • the contact angle of the antifouling composition for spraying on the wire W is 90 ° or less.
  • the contact angle of the antifouling spray composition for the wire W is 85 ° or less. In these cases, the antifouling composition for spraying can be applied uniformly along the surface of the wire W.
  • Examples of the material of the wire roll WR include urethane.
  • the contact angle of the antifouling composition for spraying with respect to the wire roll WR is 90 ° or less.
  • the spraying antifouling agent composition can be uniformly applied along the surface of the wire roll WR.
  • the wet paper is pressed between the pair of press rolls P via the felt F.
  • the wet paper is dehydrated by forcibly transferring the water in the wet paper to the felt F.
  • the felt F has an endless shape and is rotated in a state where a certain tension is applied by the felt roll FR.
  • the antifouling composition for spraying is sprayed onto the press roll P by the spray nozzle S3 of the spraying device. Further, the antifouling composition for spraying is sprayed onto the felt F by the spray nozzle S41 of the spraying device on the side in contact with the wet paper X, and sprayed by the spray nozzle S42 of the spraying device on the side not in contact with the wet paper X. Antifouling agent composition is sprayed. Furthermore, the antifouling composition for spraying is sprayed on the felt roll FR by the spray nozzle S5 of the spraying device on the felt roll FR in contact with the felt F on the side in contact with the wet paper web X. That is, the antifouling composition for spraying is sprayed on the felt roll FR located outside the endless felt F.
  • the material of the felt F examples include nylon and polyester.
  • the contact angle of the antifouling composition for spraying with the felt F is preferably 65 ° or less.
  • the contact angle of the antifouling composition for spraying with the felt F is 85 ° or less. In these cases, the antifouling composition for spraying can be uniformly applied along the surface of the felt F.
  • the material of the felt roll FR examples include urethane.
  • the contact angle of the antifouling composition for spraying with the felt roll FR is preferably 90 ° or less.
  • the spraying antifouling agent composition can be uniformly applied along the surface of the felt roll FR.
  • Examples of the material of the press roll P include urethane or ceramic.
  • the contact angle of the antifouling composition for spraying with the press roll P is 90 ° or less.
  • the contact angle of the antifouling composition for spraying to the press roll P is 65 ° or less. In these cases, the antifouling composition for spraying can be applied uniformly along the surface of the press roll P.
  • the application amount of the antifouling composition for application is preferably 1 to 100 g / m 2 .
  • the spraying amount is less than 1 g / m 2 , compared to the case where the spraying amount is within the above range, the spraying antifouling agent composition does not sufficiently adhere to each traveling member and the pitch contamination cannot be suppressed.
  • the application amount exceeds 100 g / m 2 , the excess amount may be absorbed by the paper body (wet paper) as compared with the case where the application amount is within the above range.
  • the antifouling composition for spraying satisfies the contact angle condition described above with respect to the wire W, the wire roll WR, the felt F, the felt roll FR and the press roll P of the wet part of the paper machine. By spraying at the sprayed amount, pitch contamination can be reliably prevented.
  • the spraying method of the antifouling composition for spraying according to the present invention will be described.
  • the running speed of the wet paper is 200 to 2000 m / min, and the moving speed of the wire W or the felt F is substantially the same as the running speed of the wet paper.
  • the rotation speed of the wire roll WR, the felt roll FR or the press roll P corresponds to the running speed of the wet paper.
  • FIG. 2 is explanatory drawing for demonstrating the spraying method of the pollution inhibitor composition for spraying which concerns on this invention.
  • the spraying method of the antifouling agent composition for spraying according to the present invention while the wire W or the felt F of the wet part is running (moving), the antifouling agent composition for spraying described above is applied to them.
  • a spraying device having a spray nozzle S and a removal process of sucking and removing the spraying antifouling composition sprayed by the suction box SB.
  • the spray nozzle S of a spray device is provided in the upstream, and downstream.
  • a suction box SB is provided.
  • the spraying device applies the spraying antifouling composition to the wire W or the felt F at a spraying amount of 1 to 100 g / m 2.
  • the suction box SB removes at least 50% or more of the spraying amount of the spraying antifouling composition within at least 2 seconds. Thereby, the corrosion by the alkali of the wire W or the felt F can be suppressed.
  • the method of spraying the antifouling composition for spraying according to the present invention is described above while the wire roll WR, felt roll FR or press roll P of the wet part is running (rotating).
  • the spraying device sprays upstream along the circumferential direction of the wire roll WR, felt roll FR or press roll P of the wet part.
  • a nozzle S is provided, and a doctor blade D is provided on the downstream side.
  • the spraying device applies the antifouling composition for spraying to the wire roll WR, felt roll FR or press roll P in an amount of 1 to 100 g. after spraying so that / m 2, at least within 2 seconds, the doctor blade D is adapted to remove at least 50% or more of the application rate of spraying antifouling composition.
  • the corrosion by the alkali of the wire roll WR, the felt roll FR, or the press roll P can be suppressed.
  • the antifouling composition for spraying according to the second embodiment is composed of a stock solution and dilution water for diluting the stock solution.
  • the stock solution is composed of an anionic polymer, a nonionic polymer, a drug composed of an inorganic alkali agent and an inorganic salt, and water for dissolution. That is, the antifouling composition for spraying according to the second embodiment is the same as the antifouling composition for spraying according to the first embodiment, except that the drug further contains a nonionic polymer.
  • nonionic polymer examples include water-soluble polymers whose ionicity exhibits nonionic properties. Examples thereof include polyethylene glycol, polyoxyethylene alkyl ether, and polyoxyethylene alkyl ester.
  • the antifouling composition for spraying can further improve the antifouling effect by containing a nonionic polymer.
  • the blending ratio of the nonionic polymer to 1 part by mass of the anionic polymer is preferably 0.1 parts by mass or more, and more preferably 0.1 to 1 part by mass.
  • the blending ratio of the nonionic polymer to 1 part by weight of the anionic polymer is less than 0.1 part by weight, the effect of preventing pitch contamination may not be sufficiently improved as compared with the case where the blending ratio is in the above range. There is.
  • the stock solution and the dilution water are prepared separately, and the stock solution is obtained by diluting with the dilution water.
  • the usage example of the antifouling composition for spraying in the wet part is the same as the usage example of the antifouling composition for spraying according to the first embodiment described above, the description thereof is omitted.
  • the antifouling composition for spraying according to this embodiment, it is used in the wet part of a paper machine, but it can also be used in a dry part or a reel part. Further, the structure of the wet part is not limited to that shown in FIG.
  • polyacrylic acid sodium salt A (molecular weight 20,000), polyacrylic acid sodium salt B (molecular weight 50,000), polyacrylic acid sodium salt C (molecular weight 200,000), polyacrylic acid Sodium salt D (molecular weight 500,000) was prepared. Moreover, sodium hydroxide was prepared as an inorganic alkali agent. Moreover, sodium sulfate was prepared as an inorganic salt.
  • Examples 1 to 23 and Comparative Examples 1 to 54 A drug composed of sodium salt of polyacrylic acid, sodium hydroxide and sodium sulfate was dissolved in water for dissolution (industrial water) to prepare a stock solution. The stock solution was diluted with dilution water to prepare a sample. Table 1 shows the component concentration (unit: ppm by weight), pH, and surface tension of each sample obtained.
  • pACR (A) indicates polyacrylic acid sodium salt A
  • pACR (B) indicates polyacrylic acid sodium salt B
  • pACR (C) indicates polyacrylic acid.
  • Sodium salt C “pACR (D)” represents sodium salt D of polyacrylic acid, “NaOH” represents sodium hydroxide, and “Na 2 SO 4 ” represents sodium sulfate. “-” Means that the compound was not used.
  • Table 2 shows the values of the contact angle (unit: °) of each sample. The contact angle was measured by the droplet method, and the angle was measured by the ⁇ / 2 method. Specifically, 2 ⁇ l of the sample is taken out from the needle direction from the upper direction, a nylon plate, a urethane plate, a polyester plate or a ceramic plate is brought closer from the lower direction. After 1 second, the left and right contact angles of the drug solution remaining on the plate were measured three times, and the average value was calculated.
  • Examples 24-31 and Comparative Examples 64-67 A drug consisting of sodium salt of polyacrylic acid, sodium hydroxide, sodium sulfate and polyethylene glycol (nonionic polymer, molecular weight 20000) was dissolved in water for dissolution (industrial water) to prepare a stock solution. The stock solution was diluted with dilution water to prepare a sample. Table 4 shows the component concentration (unit: ppm by weight), pH, and surface tension of each sample obtained. In Table 4, “PEG” represents polyethylene glycol. “-” Means that the compound was not used.
  • Examples 32 and 33 and Comparative Examples 68 to 75 A sample was prepared in the same manner as in Example 1 except that sodium salt of polysulfonic acid (anionic polymer, molecular weight 20000) was used instead of sodium salt A of polyacrylic acid.
  • Table 5 shows the component concentration (unit: ppm by weight), pH, and surface tension of each sample obtained.
  • pSLF represents a sodium salt of polysulfonic acid.
  • “-” Means that the compound was not used.
  • the samples of Examples 1 to 33 were excellent in resin dispersibility.
  • the polyacrylic acid sodium salt, sodium hydroxide, and sodium sulfate are contained in an amount of 1, 0.1, 0.01 parts by mass or more, respectively, PEG may be contained in an amount of 1 part by mass or more, and the pH is 10.3 or more.
  • the surface tension was 63 mN / m or more and the contact angles to nylon, urethane, polyester, and ceramic were 61 °, 85 °, 80 °, and 62 ° or less, respectively, the resin dispersibility was excellent.
  • the spraying antifouling composition of the present invention is used as a spraying antifouling composition for preventing pitch contamination in the wet part of a paper machine. According to the antifouling composition for spraying of the present invention, there is an advantage that pitch contamination of the wet part can be sufficiently prevented and foaming hardly occurs.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

Le problème décrit par la présente invention est de fournir : une composition de pulvérisation antisalissures qui permet d'empêcher suffisamment qu'un élément mobile se déplaçant dans une partie humide d'une machine à papier ne soit contaminé par la poix et qui ne mousse pas facilement ; et un procédé de pulvérisation de la composition. La solution selon l'invention porte sur une composition de pulvérisation antisalissures avec laquelle un élément mobile se déplaçant dans une partie humide d'une machine à papier est pulvérisé pour empêcher une contamination par la poix. La composition de pulvérisation antisalissures comprend une solution mère et une eau de dilution servant à diluer la solution mère, la solution mère contenant de l'eau de dissolution et un agent chimique qui comprend un polymère anionique, un agent alcalin inorganique et un sel inorganique, le rapport de mélange de l'eau de dilution étant de 100 à 10'000 parties en masse par rapport à 1 partie en masse de l'agent chimique.
PCT/JP2017/035136 2016-11-30 2017-09-28 Composition de pulvérisation antisalissures et son procédé de pulvérisation WO2018100861A1 (fr)

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JP2016-233567 2016-11-30
JP2017175198A JP6281017B1 (ja) 2016-11-30 2017-09-12 散布用汚染防止剤組成物及びその散布方法
JP2017-175198 2017-09-12

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JP2021091986A (ja) * 2019-12-09 2021-06-17 日本製紙株式会社 フェルト洗浄装置とフェルト洗浄方法
JP2023112623A (ja) * 2022-02-01 2023-08-14 株式会社メンテック 汚染防止剤組成物

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JP2023112623A (ja) * 2022-02-01 2023-08-14 株式会社メンテック 汚染防止剤組成物

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