Estimation method of macro-sticky amount in paper production

Abstract

To provide a more proper pitch countermeasure technique in a paper production step.SOLUTION: This invention provides an estimation method of a macro-sticky amount in a paper production based on an acrylate-based polymer amount included in a management object in a paper production. This invention provides a paper production method where a macro-sticky countermeasure level in a paper production is controlled based on increase and decrease of an acrylate-based polymer amount included in a management object in a paper production.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a method for estimating the amount of macro-stickiness in paper manufacturing, a paper manufacturing method, and the like. [Background technology]

[0002] Pitch is contained in pulp-containing water during paper manufacturing, causing pitch problems. Generally, pitch refers to a hydrophobic adhesive substance that is mainly composed of resin components derived from pulp, synthetic adhesive substances in recycled waste paper, and organic matter derived from additives used in the papermaking process. When pitch is contained in pulp-containing water used as a papermaking raw material and accumulates, it causes defects (spots) in paper products and frequent paper breaks due to agglomerated pitch lumps, and also adheres to papermaking machines, papermaking tools, and equipment in the papermaking process, causing pitch problems such as reduced product quality, reduced production efficiency, and poor dewatering due to the adhered pitch.

[0003] Countermeasures against pitch troubles include mechanical measures such as resin coating of equipment, removal of pitch impurities with screens and cleaners, refining of pitch lumps with kneaders and refiners, and chemical measures such as external additives such as tool cleaners and internal additives such as fixing agents, dispersants, detackifying agents and decomposing enzymes, as well as measures to adjust and control operating conditions such as regular machine cleaning and discharge of excess white water and reject slurry outside the system.

[0004] For example, Patent Documents 1 to 5 propose methods for grasping and continuously measuring the amount of pitch in paper production using fluorescent dyes. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] WO2007 / 082376 [Patent Document 2] WO2008 / 104576 [Patent Document 3] Special Publication No. 2012-521009 [Patent Document 4] JP 2017-009564 A [Patent Document 5] Special Publication No. 2016-535244 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the present inventor believes that the methods for grasping and continuously measuring the amount of pitch using fluorescent dyes as described in Patent Documents 1 to 5 often require a filtration process, which means that non-sticky hydrophobic substances such as plastic resins and water-soluble hydrophobic substances such as surfactants are also measured, and that differences in the quality (components) of pitch during paper production are not apparent, which are problems in taking measures against pitch.

[0007] Therefore, a main object of the present invention is to provide a more appropriate technique for dealing with pitch in the paper manufacturing process. [Means for solving the problem]

[0008] As a result of intensive research, the inventors found that acrylate polymers, which are one of the main pitch components derived from waste paper, are not detected in finely dispersed pitch in the process water of the raw material process or the primary circulation system of the papermaking machine, but are detected only in macro-stickiness. Based on this, the inventors believed that measures specialized for macro-stickiness would be effective for pitch problems mainly caused by acrylate polymers, and came up with the idea of ​​taking effective measures against pitch by controlling the implementation level (implementation standard) of macro-stickiness measures according to the increase or decrease of acrylate polymers in the managed items (defects, deposits, etc.) in paper manufacturing.

[0009] Furthermore, as a result of intensive research, the present inventors have found that the increase or decrease in the amount of acrylate-based polymers in a target can be better judged from the results of IR spectrum analysis of the target. More specifically, the increase or decrease in the amount of acrylate-based polymers in a target can be better judged from the results of IR spectrum analysis of the target.-1 and the strength of absorption in the vicinity, and the ratio of the total absorption area or height in the IR spectrum to the wave number 1160 cm -1 It has been found that by using the ratio of the area or height of the peak adjacent thereto, detection or measurement can be performed more accurately and simply.

[0010] The inventors further considered that the countermeasures against macro-stickiness should preferably be carried out by using one or more selected from the following: removal using a screen or cleaner (to increase the reject rate); strengthening cleaning such as by adding more tool washing showers and pressurizing or heating the shower water; strengthening external chemicals such as cleaning agents or adhesion inhibitors used for tools in the wet or dry parts; and strengthening internal chemical treatment such as anti-adhesive agents for macro-stickiness.

[0011] As a result of such intensive research, the present inventors have focused on the relationship between acrylate-based polymers in pitch and macro-stickiness, and have been able to clarify this relationship, and have newly discovered that it is possible to estimate the amount of macro-stickiness in the controlled material in paper production based on the acrylate-based polymers in the controlled material, and that by using this relationship, it is possible to take better measures against macro-stickiness in paper production. This also makes it easier to manage products, equipment, etc. in paper production (for example, quality control, cleaning control, etc.). That is, the present invention is as follows.

[0012] The present invention can provide a method for estimating the amount of macro-stickiness in paper production based on the amount of acrylate-based polymers contained in the paper production target. The present invention can provide a paper manufacturing method in which the amount of acrylate polymer included in the controlled material in paper manufacturing is controlled to a level required for preventing macro-stickiness in paper manufacturing, based on an increase or decrease in the amount of acrylate polymer included in the controlled material in paper manufacturing. Effect of the Invention

[0013] According to the present invention, it is possible to provide a more appropriate technique for dealing with pitch in the paper manufacturing process. [Brief description of the drawings]

[0014] [Figure 1] IR absorption spectrum of an acrylate-based adhesive. [Diagram 2] IR absorption spectrum of EVA. [Diagram 3] 1 is an IR absorption spectrum of SBR latex. [Figure 4] IR absorption spectrum of a rosin sizing agent. [Diagram 5] 1 is an IR absorption spectrum of the raw slurry solvent extract. [Figure 6] IR absorption spectrum of macrosticky. [Figure 7] FIG. 2 is a graph showing the relationship between the acrylate content (%) and the absorption peak area ratio at a wave number of 1,160 cm −1 in the IR absorption spectrum. [Figure 8] This is a diagram showing the relationship between the amount of raw material macro-stickiness and the number of pitch defects. In the figure, the plots (black circles) of the defect solvent extract IR1160 cm-1 absorption peak area ratio less than 1% and their correlation coefficients, and the plots (white squares) of the defect solvent extract IR1160 cm-1 absorption peak area ratio 1% or more and their correlation coefficients are shown. [Figure 9] FIG. 1 is a schematic diagram showing each step of paper manufacturing in the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, the embodiment for carrying out the present invention will be described. Note that the embodiment described below shows an example of a typical embodiment of the present invention, and the scope of the present invention is not limited by this and should not be interpreted as being limited thereby. The upper limit value (less than or equal to, etc.) and the lower limit value (more than or equal to, etc.) in the numerical range (~, etc.) can be arbitrarily combined as desired.

[0016] 1. Macro-sticky control technology according to the present invention In recent years, with the improvement of the recycling rate of waste paper, it has become common to reuse low-grade waste paper with a lot of impurities. Typical impurities in waste paper raw materials include adhesives from labels and stickers attached to waste paper, and adhesives from tapes, adhesives, and glues used to shape boxes, etc. Such adhesive impurities are contained in the process water of paper manufacturing and adhere to paper manufacturing equipment (equipment, tools, manufacturing areas, etc.), and are the main cause of pitch troubles that occur especially in papermaking machines. The main components of conventional pitch were mainly resin acids derived from pulp, rosin derived from sizing agents, which are internal additives, AKD (alkyl ketene dimer), ASA (alkenyl succinic anhydride), latex derived from coating materials with SBR (styrene butadiene rubber) as the main components, etc. However, in recent years, the main components of pitch have come to be derived from sticky impurities in waste paper, and examples of sticky impurities derived from such impurities include EVA (ethylene vinyl acetate copolymer) and acrylate polymers.

[0017] Generally speaking, "pitch trouble" refers to the occurrence of defects (spots) and an increase in paper breaks, as well as soiling the papermaking machine and reducing the performance of tools such as wires, felts, and canvases, resulting in a decline in the quality of the paper product and a decrease in the operating efficiency of the papermaking machine. Pitch troubles caused by dirt on the papermaking machine can be caused by slime, scale, and other substances in addition to pitch, but in paperboard that contains a high percentage of recycled paper, there is a large variation in the quality and quantity of the impurities derived from the recycled paper, so pitch troubles caused by impurities are said to be the most difficult of all the problems caused by dirt on the papermaking machine to control.

[0018] In general, various measures against pitch troubles are implemented, such as one or more of the following: equipment resin coating; equipment measures such as removal of pitch impurities by screens and cleaners, and fragmentation of pitch agglomerates by kneaders and refiners; chemical measures such as external additives such as tool cleaning solutions, internal additives such as fixing agents, dispersants, detackifying agents, and decomposing enzymes; and measures by adjusting operating conditions such as regular machine washing and increasing the amount of excess white water and rejection slurry discharged outside the system. In this way, at paper manufacturing sites, various equipment, chemicals, and operating condition adjustments for pitch countermeasures are installed and pitch countermeasures are implemented. However, since pitch countermeasures are accompanied by disadvantages such as increased costs for equipment investment, power costs, and chemical costs, increased runoff raw materials, extended downtime, and reduced strength of paper products, it is desirable to implement the minimum necessary pitch countermeasures. Furthermore, the quality (composition) and quantity of pitch derived from wastepaper raw materials fluctuate greatly, but the causes of this fluctuation are often not fully understood, and uniform measures are often implemented. In particular, since it is difficult to know the quality (composition) of pitch easily and quickly, it is difficult to say that real-time pitch measures according to the quality (composition) of pitch are being implemented.

[0019] Therefore, a main object of the present technology is to provide a new technique for dealing with pitch, and more preferably, for dealing with macro-stickiness. The present technology may also be intended to provide a pitch countermeasure that can deal with fluctuations derived from waste paper, enabling appropriate countermeasures to be taken when necessary, rather than the previously uniform pitch countermeasures. The present technology may also be intended to provide a new pitch amount analysis technology for more appropriately taking pitch countermeasures in the paper manufacturing process. Furthermore, the present technology may be intended to provide a technology that can more easily and quickly grasp increases and decreases in the amount of acrylate-based polymers in paper manufacturing, and a technology that enables various responses (preferably real-time responses or automatic control responses) to pitch problems derived from acrylate-based polymers.

[0020] Pitch generated in the paper manufacturing process is roughly divided into fine pitch and macro-sticky. In the raw materials for paperboard made mainly from recycled paper, the adhesive components of adhesive tapes and labels that are difficult to be finely divided by process share include acrylate-based, SBR-based, natural rubber-based, urethane-based, silicone-based, etc. However, the present inventor found that acrylate-based materials are more prevalent in paper applications, and that most of the adhesives in macro-sticky materials are acrylate-based. In other words, the present inventor found that most of the macro-sticky materials contained in the slurry, dehydrated cake, and process water in paper manufacturing using recycled paper as a raw material and in the processes and equipment involved in the paper manufacturing process are acrylate-based adhesives.

[0021] Furthermore, acrylate polymers are difficult to disperse finely due to their high adhesiveness and elasticity, and are not detected at all in fine pitch dispersed in the papermaking process water. Furthermore, acrylate polymers are often found in defects that cause deterioration of paper quality and in tool adhesions that cause reduced productivity. Furthermore, macro-sticky differs from fine pitch dispersed in the process water not only in its components, but also in its large size, adhesiveness, and elasticity, so appropriate measures against macro-sticky require different measures from those against other pitch components.

[0022] From the above, the inventors have deduced that macro-stickiness countermeasures are effective for pitch mainly composed of acrylate-based polymers. By focusing on the presence of acrylate-based polymers in the target, the inventors have provided a more appropriate macro-stickiness countermeasure technology for the macro-stickiness in the paper manufacturing process based on the presence of acrylate-based polymers in the target.

[0023] Furthermore, the present inventors have found that IR analysis can be used as a means or method for identifying acrylate polymers present in paper manufacturing control materials, and can selectively detect and quantitatively measure acrylate polymers, thereby enabling the amount of macro-sticky substances, which are sticky foreign substances present or generated in paper manufacturing, to be estimated from the amount of acrylate polymers present in paper manufacturing control materials.

[0024] The inventors have also found that the macro-sticky content in an object can be determined based on the amount of acrylate-based polymers in the object, and more preferably, the increased risk of macro-stickiness can be determined as the content ratio of acrylate-based polymers increases. The inventors have also found that since the amount of acrylate-based polymers in an object can be determined more simply and quickly, macro-sticky countermeasures, more preferably management and control of the macro-sticky state at paper manufacturing sites including paper manufacturing and the processes and facilities involved therein, can be more appropriately implemented.

[0025] In this technology, it is preferable to use an acrylate-based polymer as an index. In this technology, the "acrylate-based polymer" is also called an acrylate-based polymer, and can include an acrylate homopolymer polymerized from the same component (monomer, oligomer, polymer), and a copolymer obtained by polymerizing two or more different components having copolymerizability (monomer, oligomer, polymer), and in the polymerization of the copolymer, a component having copolymerizability other than acrylate may also be used together.

[0026] In this technology, it is preferable to adjust the implementation level of effective measures against macro-stickiness, which is the main source of acrylate polymers, depending on the increase or decrease in the amount of acrylate polymers contained in the target (for example, paper product determination or paper machine deposits). This makes it possible to implement efficient measures against pitch-related defects, paper breaks, paper machine stains, etc.

[0027] This technology can provide a more appropriate technique for dealing with pitch in the paper manufacturing process. This technology focuses on acrylate polymers among impurities as the cause of pitch troubles that require pitch countermeasures, and can estimate the amount of macro-stickiness contained in the target. Furthermore, by focusing on the relationship between acrylate polymers and macro-stickiness, this technology makes it possible to appropriately implement pitch countermeasures when necessary that can deal with fluctuations derived from waste paper raw materials, rather than uniform pitch countermeasures that were previously used. In addition, the present technology can easily and quickly grasp the increase or decrease in the amount of acrylate-based polymer. By easily and quickly grasping the increase or decrease in the amount of acrylate-based polymer, it is possible to deal with pitch problems caused by acrylate-based polymer in real time and / or by automatic control.

[0028] In addition, this technology can quantify the contribution of acrylate polymers to the pitch components. This technology can automatically adjust the level of macro-stickiness countermeasures by using data on the contribution of acrylate polymers to the pitch components in the managed object obtained by continuous measurement. This technology enables efficient countermeasures against pitch problems by intensively processing macro-stickiness countermeasures when pitch problems caused by acrylate polymers occur.

[0029] 2. Method for estimating macro-sticky amount in paper manufacturing according to the present invention This embodiment can provide a method for estimating the amount of macro-stickiness in paper production based on the amount of acrylate-based polymers contained in the controlled substances in paper production. This embodiment may also be a method for estimating the state of macro-stickiness stains, a method for measuring the amount of macro-stickiness, or a method for determining the amount of macro-stickiness. This embodiment can also be used as an index for measures against macro-stickiness or pitch. This embodiment can also quantify the contribution of acrylate-based polymers to the pitch component.

[0030] <Management controls in paper manufacturing> The "object to be controlled in paper manufacturing" used in this embodiment is not particularly limited as long as it is an object (hereinafter also referred to as "object at the site") that may contain acrylate-based polymers present at the site of paper manufacturing, such as paper manufacturing and the processes and equipment (equipment, parts, tools, etc.) involved therein, and examples thereof include raw material slurry, dehydrated cake, various process waters, pulp-containing materials used, generated, or formed in the process (e.g., pulp-containing water, pulp-containing sheets, etc.), adhesions (e.g., adhesions to equipment such as various processes and various devices, the tools, and the process areas), paper products, and solvent extracts thereof, from which one or more can be selected. The object to be controlled is preferably an object that can be an index for product quality control (object to be controlled quality), but may also be an object that can be an index for cleaning control of equipment, etc. (object to be controlled cleaning), or may be a monitoring object for monitoring the degree of macro-stickiness, and objects that are likely to contain macro-stickiness may be appropriately set as objects to be controlled depending on the situation, and the object to be controlled is not particularly limited. Furthermore, the targets used in this embodiment may be from the same or different sites, and may be single or multiple.

[0031] More preferably, the target is one or more selected from one or more raw material slurries selected from the preparation process, papermaking process, and water recovery process, dehydrated cake, process water, deposits on facilities (e.g., devices, tools, areas, etc.), final paper products, and solvent extracts thereof, etc. In addition, examples of the target objects in the papermaking process include various process waters, devices used in various processes, and the tools therefor, and among the papermaking processes, the raw material process (preparation process) and / or the papermaking process are preferred.

[0032] More preferably, the target is one or more selected from raw material slurry, dewatered cake, process water in a papermaking process, deposits on a papermaking machine, defects in final paper products, and solvent extracts thereof.

[0033] Usually, pulp-containing materials contain pitch such as macro-sticky, so it is preferable to target pulp-containing materials present in the paper manufacturing process. In addition, since pulp-containing materials containing macro-sticky come into contact with the devices and tools used in various processes in the papermaking process, it is preferable to target the devices and tools. In addition, defects due to macro-sticky occur, defects due to macro-sticky in the deposits attached to the papermaking machine or process equipment, paper breaks, product quality deterioration, and dehydration deterioration occur, so it is preferable to target pulp-containing water generated or formed in the papermaking process, and / or pulp-containing sheets and / or final paper products. In addition, it is said that the pulp-containing water used as a pulp raw material in the papermaking process generally has a pulp concentration of about 0.1 to 5%.

[0034] A solvent extract can be prepared using one or more of the above-mentioned objects. The solvent used when preparing a solvent extract from the above-mentioned object is not particularly limited, but more preferably an organic solvent, and even more preferably a hydrophobic organic solvent, is preferable from the viewpoint of dissolving and extracting the (meth)acrylate contained in the object. It is preferable to use a commonly used method for extracting lipid components, such as an ether extraction method, an organic solvent extraction method containing chloroform (e.g., chloroform extraction method, chloroform-benzene extraction method, chloroform-methanol extraction method, etc.), and liquid-liquid extraction (water-hydrophobic solvent, etc.) may also be used as appropriate.

[0035] The organic solvent may be one or more selected from the group consisting of hydrocarbons such as normal hexane; aromatics such as benzene; alcohols such as ethanol; ketones such as acetone; ethers such as ethyl ether; alkyl halides such as chloroform; and mixtures thereof. The extraction temperature is not particularly limited, but is preferably 10 to 60°C, and more preferably 20 to 40°C.

[0036] <Device or method for confirming acrylate> The device or method for confirming the acrylate used in this embodiment may be any device or method capable of confirming an increase or decrease in the amount of acrylate-based polymer and a relationship thereto, and may be, for example, one or more selected from visual inspection, images, odor, adhesion, elasticity, electrical conduction, vibration conduction, heat transfer, adhesion amount, color, thermal decomposition, chemical analysis, instrumental analysis, and adhesion location, etc. The device or method capable of confirmation may be a known means or method or may be a means or method that can be developed in the future. Among these, from the viewpoint of quicker and simpler analysis, the apparatus or method is more preferably one capable of analyzing the increase or decrease in the amount of acrylate-based polymer, and may be either a contact type or a non-contact type. In this case, the amount of acrylate-based polymer may be quantified by an automatic calculation software provided in the various apparatus.

[0037] As a device or method capable of analyzing an increase or decrease in the amount of acrylate-based polymer, it is preferable to use a measuring instrument from the viewpoints of reproducibility and simplicity, and moreover, a device or method of optical analysis is preferable. The optical analysis is not particularly limited, and examples thereof include one or more types selected from Raman analysis, ultraviolet analysis, visible analysis, infrared analysis, etc., and may be a transmission type or a reflection type.

[0038] Among the optical analyses, infrared analysis, more preferably infrared spectroscopy (also referred to as "IR") analysis, is preferred because it is easier to detect or quantitatively measure the acrylate polymer and its amount. Among the confirmation means or methods used in this embodiment, a method of evaluating defects or deposits in paper production or solvent extracts thereof using the IR spectrum of the target is preferred because it is highly versatile.

[0039] Infrared spectroscopic analysis may be of a dispersion type or a Fourier transform type depending on the optical system mechanism, and any of these may be used, with the Fourier transform type being preferred. Infrared spectroscopic analysis may also be of a reflection type, and more preferably of a non-contact reflection type, which is preferred from the viewpoint of being able to quickly and easily measure objects such as deposits on a papermaking machine at the papermaking site. The measurement method for infrared spectroscopic analysis is not particularly limited, but examples thereof include transmittance measurement methods such as the Nujol method, liquid membrane method, and tablet method; and reflection measurement methods such as the reflection absorption method, external reflection method, and attenuated total reflection method, from which one or more can be selected.

[0040] The acrylate polymer used as an index in this embodiment has an IR absorption spectrum with a wave number of 1160 cm -1 and there is an absorption peak near that, with a wavenumber of 1160 cm -1 The absorption peaks at and around this region are absorption peaks that are not seen in the raw materials used for paper, particularly in other pitch components contained in waste paper raw materials. Therefore, this characteristic absorption peak region is suitable as an indicator of the acrylate polymer and its amount in paper manufacturing, so when making a judgment or estimation based on the amount of the acrylate polymer, the IR absorption spectrum wave number of 1160 cm -1 It is more preferable to use the amount of absorption peak (for example, height or area) around the absorption peak. -1 It is more preferable that the amount of absorption peak (for example, height or area) in the vicinity of the absorption peak can be measured.

[0041] The present inventors have found that acrylate polymers have an IR absorption spectrum with a wave number of 1160 cm -1 There is a characteristic absorption peak at and around the wavenumber of 1160 cm -1 It was found that the characteristic absorption peak at and around this area is not seen in the raw materials used for paper, especially the pitch components contained in waste paper. -1 The present inventors have found that the detection or measurement of the characteristic absorption peak and its amount around the peak and the result are suitable as indicators for the detection or measurement of acrylate-based polymers and their amount. Furthermore, the present inventors have found that there is a relationship (more preferably a correlation) between the amount of acrylate-based polymers in a target and the amount of macro-stickiness in the target, and therefore found that the amount of acrylate-based polymers in a target is suitable as an indicator of the amount of macro-stickiness.

[0042] Furthermore, the inventors have determined that the total amount of absorption peaks at specific wavenumbers in the IR absorption spectrum is -1 It has been found that the ratio of "and the amount of characteristic absorption peaks in the vicinity thereof" can be used as an index of an increase or decrease in acrylate, since it shows a relationship with the ratio of acrylate polymers to other components, particularly other pitch components. As a result, in this embodiment, the ratio of "the amount of characteristic absorption peaks in the vicinity of the wavenumber 1160 cm" to "the total value of the amount of absorption peaks in the specific wavenumber of the IR absorption spectrum" is -1 The ratio of the amount of characteristic absorption peaks at or near the 1160 cm can be better used as an indicator of the increase or decrease in acrylate. -1 The "nearby" is preferably ±30cm -1 , more preferably ±20 cm -1 , and more preferably ±10 cm -1 , more preferably ±5 cm -1 It is. In addition, the "total value of the absorption peak amount of a specific wave number in the IR absorption spectrum" is "wave number 1160 cm -1 and the amount of characteristic absorption peaks in the vicinity of it, in other words, -1 and the amount of characteristic absorption peaks in the vicinity thereof / the total value of the amount of absorption peaks at a specific wave number in the IR absorption spectrum, or the ratio may be referred to as "the area ratio or height ratio of the absorption peak at a specific wave number in the IR absorption spectrum." The total value may be a total value of a plurality of values ​​including the amount of the characteristic absorption peaks, or a total value of a plurality of values ​​excluding the amount of the characteristic absorption peaks. The "total value" may be referred to as the "total amount."

[0043] The "peak amount" in the present technology may include a peak height and / or a peak area, and in this calculation, the absolute value of the obtained data value may be used, but in practice, a difference value from a base (for example, the absolute value of the obtained data value - the base value) obtained by an automatic calculation software built into a measuring device or the like is generally and preferably used. In this technique, the number of "peaks" may be either single or multiple. Peak-related data such as peak shape, peak height, peak amount, peak area, peak number, peak selection, peak intensity, and peak relative intensity can be obtained using automatic measurement software provided in a general IR measurement device. Another advantage of this technique is that the amount of macro-stickiness can be estimated using automatic calculation software provided in the IR measurement device. In addition, in IR analysis, it is common to express it in terms of relative strength such as relative intensity.

[0044] In the present technology, the "number of peaks" selected from the "absorption peaks at a specific wave number" may be either single or multiple. The "specific" in the "absorption peak amount at a specific wave number" in the present technology is not particularly limited, but may be all detectable absorption peaks, any number of absorption peaks selected in descending order, or a single or multiple absorption peaks that are assumed to be the target substance and do not necessarily have a large absorption peak amount, but is not particularly limited to these, and may or may not necessarily be a fixed wave number. Such "specific" may be selected by automatic measurement software provided in the IR measurement device. The specific wave number (cm -1 ) may be, for example, one or more types selected from 670, 700, 720, 800, 880, 1000 to 1050, 1240, 1260, 1380, 1400 to 1450, 1470, 1700 to 1740, 2800 to 3000, etc., but is not limited thereto.

[0045] The amount of the acrylate-based polymer is determined by the IR spectrum wave number of 1160 cm -1 It is preferable that the absorption peak can be detected or measured based on the relative intensity of the largest absorption peak amount observed in the vicinity of the IR spectrum wave number 1160 cm. -1 The increase or decrease in the amount of acrylate can be confirmed based on the relative intensity of the absorption peak and its vicinity.

[0046] In a more preferred embodiment, the amount of the acrylate polymer is:-1 and (b) the total value of the absorption peak amounts selected from a single or multiple absorption peaks in the measurement wavenumber range other than the largest absorption peak] for [IR spectrum wavenumber 1160 cm -1 It is preferable that the absorption peak be detected or measured by the absorption peak at or near the IR spectrum wave number of 1160 cm. -1 The sum of the absorption peaks in the IR spectrum at wave number 1160 cm is usually the numerator of the fraction, but the numerator and denominator may be interchanged, as in the reciprocal. -1 It may include or exclude the largest absorption peak found in the vicinity of the absorption peak. In addition, "relative to" such as "total value of the absorption peak amounts at specific wavenumbers in the IR absorption spectrum" may be "occupying", and in the case of "occupying", it may be a percentage (%) with the "total value of the absorption peak amounts at specific wavenumbers in the IR absorption spectrum" being 100%. In addition, the "measurement wavenumber range" refers to the usual measurement wavenumber range of the IR spectrum (for example, 600 to 4000 cm -1 ), but the wave number (cm) shown in the IR absorption spectrum in FIG. -1 ) may be appropriately selected to set an arbitrary measurement wavenumber range.

[0047] As a specific example of a preferred embodiment, for example, (Pattern 1) one specific wave number is selected and the intensity of the absorption peak of that wave number and the intensity of the absorption peak of 1160 cm -1 and the intensity of the absorption peak in the vicinity of the specific wavenumbers; (Pattern 2) Select multiple specific wavenumbers and calculate the relative intensity of the absorption peak at each wavenumber and the intensity of the absorption peak at 1160 cm -1 and the intensity of the absorption peak in the vicinity of the specific wavenumbers; (Pattern 3) Select multiple specific wavenumbers and calculate the relative intensity of the absorption peak at each wavenumber and the intensity at 1160 cm -1and calculating the relative intensity of the absorption peak in the vicinity of the specific wavenumber and calculating the average value from the total value of the selected number of specific wavenumbers; and the like. From these, one or more, two or more, or three types can be selected, but the preferred embodiments of the present technology are not limited to these. In addition, "1160cm -1 The "intensity of the absorption peak in the vicinity of the 1160 cm IR spectrum" may be either the numerator or denominator of the fraction, but the numerator is preferred. -1 and the largest absorption peak amount observed in the vicinity thereof] is more preferable.

[0048] More preferable "1160cm -1 and the characteristic absorption peaks in the vicinity of the IR spectrum at wave numbers 1150-1170 cm -1 Among these, it is preferable that the absorption peak amount is one or more absorption peak amounts having a high height or a large area, and it is more preferable that the absorption peak amount is the largest absorption peak amount. The more preferable "total value of the absorption peak amount of a specific wave number of the IR absorption spectrum" is "IR spectrum wave number 600 to 4000 cm -1 (Preferably 600 to 3000 cm -1 )” and more specifically, “IR spectrum wave number 600 to 4000 cm -1 (Preferably 600 to 3000 cm -1 It is preferable that the absorbance is the amount of an absorption peak at a specific wave number in a specific range, ie, the amount of .... Since the absorbance on the vertical axis of an IR absorption spectrum is proportional to the concentration or thickness of a substance, it is preferable to perform a quantitative analysis based on the height or area of ​​the peak.

[0049] The more preferable "amount of acrylate-based polymer" is [IR spectrum wave number 600 to 4000 cm -1 (Preferably 600 to 3000 cm -1 ) in the total amount of absorption peaks at specific wavenumbers in the IR spectrum (wavenumbers 1150-1170 cm -1It is preferable that the amount of the acrylate polymer can be detected or measured based on the ratio of the largest characteristic absorption peak amount among the IR spectrum wave numbers of 600 to 4000 cm. -1 of the total amount of absorption peaks at specific wavenumbers in the IR spectrum at wavenumber 1160cm -1 In the present embodiment, the "total amount of absorption peaks" and "amount of high and characteristic absorption peaks" refer to the height of a single or multiple absorption peaks within a specified range, or the area or region calculated with each absorption peak as the apex. In the case of the "amount of high and characteristic absorption peaks", the base in the area calculation is 1150 cm -1 More than 1170cm -1 The following ranges are not particularly limited.

[0050] In this embodiment, the IR spectrum wave number is 1150 to 1170 cm -1 By selecting the largest absorption peak amount among the above, the characteristic peak of the acrylate polymer can be selected and obtained. In addition, the "largest characteristic absorption peak amount" is the amount at which the operator or the control unit can select and obtain the characteristic peak of the acrylate polymer. -1 It is preferable to select the largest absorption peak amount in the vicinity of the peak from the viewpoint of more easily identifying the "characteristic absorption peak". However, in order to identify the "characteristic absorption peak" more accurately, for example, the wave number 1150 to 1170 cm of a standard acrylate polymer (preferably polyacrylate) as shown in FIG. -1 The determination may be made by comparison with a characteristic peak among the peaks shown in FIG. 1, or by adding a standard acrylate polymer as an internal standard and looking at the increased peak.

[0051] In this case, the ratio, total value, height or area, and proportion of the IR spectrum can be obtained using automatic calculation software (e.g., area occupancy calculation software, etc.) generally built into the IR spectrum device. In addition, the conditions of the IR spectrum are preferably Fourier transform and transmission measurement method. In addition, the peak quantification method can be a general peak quantification method, for example, the spectrum is displayed as absorbance, a base point is placed outside both ends of the peak, and quantification can be performed based on the height or area between the baseline and the spectrum. In this case, it is preferable to use a method that minimizes the influence of adjacent peaks. For example, general methods used in chromatography data processing devices, specifically, the area percentage method (ratio of each peak = [peak area / total area of ​​peaks) x 100 (%)), the corrected area percentage method, etc. can be referenced. For example, a calibration curve is created using a standard sample of an acrylate polymer, and the calibration curve data is stored in a storage unit or the like in advance and acquired by the control unit as necessary. The calibration curve data can be used in the control unit to perform quantitative calculations (e.g., calculations of height and content) of the acrylate polymer in the target. The quantitative calculation results of the acrylate polymer in the target can also be used to calculate the amount of acrylate polymer or the content of acrylate polymer in the target. This makes it possible to more accurately grasp the amount of acrylate polymer or the content of acrylate polymer in the target, or the increase or decrease thereof.

[0052] In this embodiment, as shown in Figs. 7 and 8, the relationship between the acrylate content (%) and the IR absorption spectrum, and the correlation between the absorption peak area ratio at a specific wave number of the IR absorption spectrum and the acrylate content (%) can be recognized by regression analysis (preferably a simple regression equation, least squares method, etc.), and since the main component of macro-stickiness is an acrylate-based polymer, the "amount of acrylate-based polymer (content (%))" in the object can be obtained based on the "absorption peak area ratio at a specific wave number of the IR absorption spectrum" obtained from the object, and further, the "amount of macro-stickiness" in the object can be calculated, estimated, predicted or quantified based on the "amount of acrylate-based polymer" in the object. Furthermore, from this "amount of macro-stickiness", for example, as shown in Fig. 8, the relationship between the "amount of macro-stickiness in the raw slurry" and "pitch defects" can also be shown. The amount of macro-stickiness (mm 2 / kg) can be calculated according to JIS P8231:2005. The "subject" in "the amount of acrylate-based polymer in the subject" preferably means the subject of "measurement" and may be the same as or different from the "subject" in "the amount of macro-stickiness in the subject." The subject may be a subject of management such as a quality control subject or a cleaning control subject.

[0053] In this embodiment, the objective variable "amount of macro-stickiness in the object" can be estimated by using "amount of acrylate-based polymer in the object" as an explanatory variable. In a more preferred embodiment, the objective variable "amount of macro-stickiness in the object" can be estimated by using "area ratio of absorption peak at specific wave number of IR absorption spectrum" as an explanatory variable. The relationship between these two variables can be expressed in the form of a linear equation Y=aX+b (a: slope, b: y intercept, and in some cases, the range of x can be set (e.g. c≦x≦d, etc.), and the formula is not uniquely limited, and a more suitable formula can be obtained appropriately by acquiring data according to the scale of the facility, the type of waste paper raw material, the site, the object at the target site, the season, etc. In addition, the amount of macro-stickiness in the object may be estimated by replacing "area ratio of absorption peak at specific wave number of IR absorption spectrum" with an explanatory variable that is correlated with the amount of acrylate-based polymer other than this. "Explanatory variable that is correlated with the amount of acrylate-based polymer other than this" can be obtained using a known analysis method or analytical method. Furthermore, as shown in FIG. 8, by setting a pitch trouble factor (for example, the number of pitch defects (pieces / day)) that is correlated with the "macro-sticky amount in the target", the amount of the set factor (pitch trouble, pitch countermeasures, etc.) and its increase or decrease can be predicted or estimated from the amount of acrylate-based polymer by IR absorption spectrum analysis. It is preferable to select one or more of the set factors from pitch trouble, pitch countermeasures, etc. This makes it possible to better predict and set pitch trouble and pitch countermeasures, and optimize the pitch countermeasures.

[0054] 3. Paper manufacturing method based on macro-sticky amount estimation according to this embodiment In the description of the paper manufacturing method based on estimation of the macro-sticky amount in this embodiment, the description of the target, the amount of acrylate-based polymer, estimation of the macro-sticky amount, each configuration and each processing method of pitch, etc., which overlap with the above "1.", "2.", etc., will be omitted as appropriate, but the description of "1.", "2.", etc. also applies to this embodiment and can be adopted as appropriate. Furthermore, in the description of an example of the paper manufacturing method based on estimation of the pitch amount (preferably the macro-sticky amount) in this embodiment, the description described later can also be applied to this embodiment and can be adopted as appropriate.

[0055] Furthermore, in this embodiment, for example, "doing" such as "adjusting" may be expressed as a "process" or a "step", a "step" may be expressed as "doing" or a "process", and a "process" may be expressed as "doing" or a "step". Furthermore, in this embodiment, a "process", "means", and "mechanism" may be a system, an apparatus, a part, or a method, or vice versa, and an "apparatus" may be a system, a means, a mechanism, or a part, or vice versa. Furthermore, a "part" may be a part or an apparatus to be provided in a mechanism, an apparatus, a means, or a system, or vice versa. Furthermore, in this embodiment, the order of the processes may be random, and the processes may be rearranged.

[0056] This embodiment can provide a paper manufacturing method that controls the level of measures against pitch caused by macro-stickiness in paper manufacturing based on an increase or decrease in the amount of acrylate-based polymer contained in a controlled substance in paper manufacturing. This embodiment may also be a method for controlling the level of measures against pitch caused by macro-stickiness in paper manufacturing. The "control" of the level of measures against pitch caused by macro-stickiness may be "adjustment," and the measures against pitch caused by macro-stickiness may be measures against macro-stickiness.

[0057] It is preferable to estimate the amount of pitch derived from macro-stickiness in paper production based on the amount of acrylate-based polymer in the target, and the level of macro-stickiness-derived pitch countermeasures in paper production can be more appropriately controlled by estimating the amount of pitch derived from macro-stickiness. In this embodiment, macro-stickiness countermeasures can be taken based on the amount of pitch derived from macro-stickiness.

[0058] The targets used in this embodiment may be from the same or different sites, and may be single or multiple. When there are multiple different sites, the priority of the targets can be set based on the amount of acrylate-based polymer, or based on the amount of acrylate-based polymer and the level of the macro-sticky pitch countermeasure data. For example, by checking targets from multiple different sites, the priority of the macro-sticky pitch countermeasures at the sites may be determined from the order of the amount of acrylate-based polymer in the targets, or the priority of the sites may be determined in the order of the high risk determined from the level of the amount of acrylate-based polymer in the pitch countermeasure data for each site, and macro-sticky pitch countermeasures may be implemented for the targets based on the priority.

[0059] The present embodiment relates to a process for estimating the amount of pitch derived from macro-stickiness in paper production based on the amount of acrylate-based polymers included in the management target in paper production; It is possible to provide a paper manufacturing method or a method for controlling the level of measures against macro-sticky-induced pitch in paper manufacturing, the method including a step of controlling the level of measures against macro-sticky-induced pitch in paper manufacturing based on the estimated increase or decrease in the amount of pitch caused by macro-stickiness.

[0060] Furthermore, the present embodiment may be a method for dealing with macro-stickiness in paper production, or a method for controlling or adjusting the level of macro-stickiness countermeasures, or a method for reducing, removing, decreasing or suppressing macro-stickiness or acrylate-based polymers in paper production, or a method for cleaning macro-stickiness or acrylate-based polymers in paper production.

[0061] In this embodiment, the "level" of "controlling to a level of macro-sticky countermeasures in paper manufacturing" may be a general level of macro-sticky-derived pitch countermeasures, or a statistically obtained level of macro-sticky-derived pitch countermeasures. The "level" may be a standard, level, etc., and the "level" of the level of macro-sticky-derived pitch countermeasures may be a "level value," in which case examples include "a numerical value equal to or greater than a predetermined value" or "within a desired numerical range." The level or level value may be appropriately set by an operator, etc., or may be determined and selected by a control unit, etc., from a preset level or level value.

[0062] In addition, since the level at which macro-sticky-related damage becomes a problem varies from site to site, it is preferable to set appropriate macro-sticky countermeasures or their levels for each site. Furthermore, in this embodiment, the "site" where macro-sticky countermeasures are implemented is more preferably a site where an object (preferably a managed object) was present and / or a site that has a relationship with the object, and the site is not particularly limited to any site related to paper manufacturing, but may include, for example, one or more types selected from paper manufacturing and the processes and facilities involved therein (e.g., devices, tools, mechanisms, areas, etc.).

[0063] In this embodiment, one or more pitch countermeasures and their levels (for example, relationship diagrams and relationship tables as shown in Figs. 7 and 8, multivariate analysis results and formulas obtained therefrom, and setting conditions and judgment methods for the levels, etc.) corresponding to each object to be confirmed may be stored in a storage unit or the like in advance, or the user or operator may input and set them appropriately from an input unit. In addition, the control unit that acquires the object data obtained by confirming the object and the data on the amount of acrylate-based polymer in the object can access a storage unit or the like, and select and acquire suitable macro-sticky pitch countermeasure data from groups (groups, classifications, categorization, etc.) that contain various macro-sticky pitch countermeasures based on the object data (site name, type or classification of the object, category, tag, etc.). The macro-sticky pitch countermeasure data may include one or more of the site name, type, classification, category, tag, and relevance to the object, so that the group can be searched from the object data. It is preferable that this macro-sticky-derived pitch countermeasure data includes one or more various data such as level data and level implementation content data for implementing appropriate macro-sticky-derived pitch countermeasures corresponding to the target.

[0064] In this embodiment, it is preferable that various data are filed with tags such as names and classifications and / or links, and the files may be stored and managed independently, or may be stored and managed in folders in an appropriate hierarchical structure, or may be stored and managed in a memory unit, server, cloud, etc.

[0065] A more preferred aspect of this embodiment includes obtaining data on the amount of acrylate-based polymer in the target; selecting and obtaining data on measures against pitch caused by macrostickiness based on the target data and / or the data on the amount of acrylate-based polymer in the target; applying the data on the amount of acrylate-based polymer in the target to the measures against pitch caused by macrostickiness to determine, select, or judge appropriate measures (such as the level and the implementation details of the level) from the measures data; implementing the appropriate measures determined at the site where the target was present and / or at a site related to the target; thereby controlling the level of the measures against macrostickiness. The control or adjustment of the level may be performed by feedback control as appropriate.

[0066] In this embodiment, the level may be set as the allowable range of the amount of macro-sticky and / or the amount of acrylate-based polymer, and the level may be set for each site such as process and equipment, and these may be stored in advance in the storage unit. This allows the macro-sticky level to be appropriately controlled for each paper manufacturing site. The level data can be selected from one or more types of level data for each site such as process and equipment. More specifically, by applying the target acrylate-based polymer amount data confirmed at the site to the macro-sticky pitch countermeasure data at the site or related thereto, an appropriate macro-sticky pitch countermeasure can be determined from among the macro-sticky pitch countermeasures, and the macro-sticky pitch countermeasure can be implemented at the site, thereby controlling the level of the macro-sticky countermeasure. For example, when the amount of acrylate-based polymer in the target is higher (worse) than the level at the site where the target was present or at a site (such as a process and equipment) related to the target, the use (e.g., amount, concentration, etc.) of a chemical such as a cleaning agent can be increased (increased); when it is lower (better) than the level at this site, the use of the chemical can be decreased (decreased); when it is within the range of the level at this site, the use of the chemical can be maintained. This can also be kept within the level range by feedback control. This level may be a standard value.

[0067] In this embodiment, the level can be appropriately set to include multiple levels such as three or five levels, or multiple types such as two or three types, or to include the implementation of different measures. For example, level A (process water a, equipment a, equipment b, equipment c: strong countermeasure level); level B (equipment a, process water b, equipment c: medium countermeasure level); and level C (process water b, weak countermeasure level) are set as countermeasures against pitch caused by macrosticky, and one or more of these levels A to C of countermeasures against pitch caused by macrosticky can be selected based on the confirmed target data (for example, the site name), and the selected level of countermeasures against pitch caused by macrosticky can be configured to implement the countermeasure level based on the confirmed data of the amount of acrylate-based polymer in the target to control the amount of macrosticky in the target.

[0068] In this embodiment, "adjusting the level" in "adjusting the level of macro-sticky countermeasures" refers to, for example, replacing raw materials with a high macro-sticky content by blowing raw materials; adjusting the amount of rejects and the amount of rejects recovered by foreign matter removal devices such as screens and cleaners in the raw material process and papermaking process; adjusting the operating strength of equipment capable of refining macro-stickiness, such as kneaders and refiners; adjusting the water pressure and water volume of the tool washing shower water, adjusting the frequency of changing the doctor blade that scrapes off deposits from the tools, and adjusting the frequency of regular washing; adjusting the amount of internally added chemicals such as detackifying agents that reduce the stickiness of the macro-sticky surface; and adjusting the amount of externally added chemicals that have the effect of dissolving, washing away, and preventing adhesion of macro-stickiness, and the like, from which one or more can be selected.

[0069] Here, since macro-sticky countermeasures differ from other pitches in size and physical properties, it is often inappropriate to implement the same countermeasures against macro-sticky as countermeasures against other pitch components. For example, countermeasures against macro-sticky by mechanical separation or removal are suitable for devices and equipment that selectively collect large foreign matter using screens and cleaners. Countermeasures against micronization of macro-sticky using kneaders and refiners have limited effectiveness due to their adhesiveness and elasticity, but they do have a certain effect. In countermeasures against macro-sticky using chemicals, fixing agents and dispersants that are effective for fine pitch are not effective for macro-sticky particles with large particles, while detackifiers that reduce the adhesiveness of the particle surface can be expected to have a certain effect as a countermeasure against macro-sticky. In addition, enzymes cannot react to the inside of macro-sticky particles, but if the adhesiveness can be reduced by enzyme reaction, a certain effect as a countermeasure against macro-sticky can be expected, similar to that of detackifiers. Resin coating of equipment and external cleaning agents can be expected to have the same effect as a countermeasure against macro-sticky as fine pitch. In this embodiment, the level of countermeasures against macro-sticky can be controlled more appropriately.

[0070] Furthermore, in this embodiment, in order to implement efficient countermeasures against macro-stickiness, it is also possible to control the level of countermeasures against macro-stickiness by combining the degree of failure, such as the number of defects and the number of broken sheets, the degree of contamination, such as the suction pressure of the felt, and information on the degree of contamination, such as the suction pressure of the felt, and the increase or decrease in the amount of acrylate-based polymer. According to this embodiment, it is possible to control the level of the macro-sticky countermeasure more appropriately than with the conventional macro-sticky countermeasure.

[0071] In the present embodiment, the countermeasures against pitch caused by macro-stickiness or the management control of pitch caused by macro-stickiness in paper production and the processes and equipment involved therein (for example, processes, devices, mechanisms, equipment, etc.) are not particularly limited, but include, for example, removal of foreign matter by a screen or cleaner; finerization of foreign matter by a kneader or refiner; cleaning of a papermaking machine or its tools such as wires and felts by equipment, showers, etc.; use of detergents for acrylate-based polymers, such as detergents and stain inhibitors effective against acrylate-based polymers used in equipment such as wires, felts, press rolls, dryer drums, and canvases; use of internally added pitch control agents effective against macro-stickiness, and the like, from which one or more can be selected. By incorporating the technology for confirming (detecting, measuring, etc.) the amount of acrylate-based polymers in the target in the present embodiment, the countermeasures against macro-stickiness or the management control in the processes and equipment involved therein that are usually carried out can be carried out more simply and appropriately.

[0072] As more suitable measures for adjusting or controlling the level of macro-stickiness countermeasures in this technology, for example, in the case of removing foreign matter using a screen or cleaner, controlling the increase or decrease of the reject amount; in the case of refining foreign matter using a kneader or refiner, controlling the increase or decrease of the refining load (e.g., the amount of electricity); in the case of cleaning a papermaking machine or its tools such as wires or felt with a shower, controlling the increase or decrease of the shower water volume and shower pressure; in the case of using chemicals, controlling the increase or decrease of cleaning agents and stain-preventing agents effective for acrylate-based polymers used in various processes (equipment, parts, tools, etc.); and in the case of using chemicals, controlling the increase or decrease of internally added pitch control agents effective against macro-stickiness.

[0073] The countermeasure against pitch caused by macro-stickiness is preferably implemented by implementing one or more of the following mechanisms: a mechanism for removing foreign matter in process water, a mechanism for reducing the size of foreign matter in process water, a mechanism for cleaning the process, and a mechanism for adding chemicals to the process. For better countermeasure against pitch caused by macro-stickiness, it is desirable to select each mechanism while considering the balance with disadvantages such as an increase in runoff raw material, reduction in size of pitch other than fibers and macro-stickiness, deterioration of tools, and increased costs for chemicals, electricity, steam, etc., and measures against them.

[0074] When the amount of acrylate-based polymer under management in paper production increases, it is preferable to increase the level of pitch countermeasures to further promote pitch countermeasures, or when the amount of acrylate-based polymer under management decreases, it is preferable to decrease the level of pitch countermeasures to further suppress or maintain pitch countermeasures, and more preferable is to take measures against macro-stickiness.

[0075] It is preferable to continuously measure the increase or decrease in the amount of acrylate polymers contained in the controlled substances in paper production over time and perform feedback control so that the amount is kept at a level suitable for pitch countermeasures.

[0076] An example of the present embodiment is shown below, but is not limited thereto. In the example 1, when the question "whether the acrylate content is equal to or greater than a predetermined amount" is answered with "Yes" or "No", the process proceeds to the next step. However, the process may proceed to the next step in a form other than this. In step 101, if the amount of acrylate-based polymer in the target is equal to or greater than the level (predetermined value) of the selected countermeasure against pitch caused by macrostickiness (Yes), the control unit strengthens the countermeasure against pitch caused by macrostickiness, or if the amount is equal to or less than the level (predetermined value) (No), the control unit maintains or weakens the countermeasure against pitch caused by macrostickiness. Here, "strong (more)" and "weak (less)" refer to a relative relationship, for example, a certain countermeasure (e.g., the amount of drug used) being stronger (more) or weaker (less) than another countermeasure (e.g., the amount of drug used). The "being" of a certain countermeasure may refer to before and after over time (e.g., a later countermeasure being stronger (more) or weaker (less) than the previous countermeasure). In addition, the level of the countermeasure against pitch caused by macrostickiness may be adjusted to be within a predetermined range by performing feedback control.

[0077] In addition, the real-time response, automatic control response, and intensive processing response in this embodiment will be described in detail below with examples, but this embodiment is not limited to these. As a preferred embodiment, when the monitored converted acrylate content or converted macro-sticky amount is (1) within a range where macro-stickiness countermeasures can be taken while paper production is being carried out, it is preferable to take a real-time response or automatic control response, while (2) when it exceeds a level where macro-stickiness countermeasures can be taken while paper production is being carried out, it is preferable to stop paper production and take a intensive processing response. The implementation of these may be controlled by the control unit.

[0078] Examples of real-time measures include, but are not limited to, continuously measuring the amount of acrylate on the press roll surface and doubling the amount of felt cleaner added when the converted acrylate content reaches 10% or more.

[0079] The automatic control method is not particularly limited, but may be, for example, to continuously measure the amount of acrylate on the press roll surface and increase or decrease the amount of felt cleaner added in proportion to the converted acrylate content.

[0080] Examples of intensive treatment include, but are not limited to, a continuous measurement of the converted macro-sticky amount of the final reject slurry of the raw material process screen cleaner, which is 500,000 mm 2 If the concentration exceeds 100% by weight / kg, production should be stopped, all of the slurry in the process should be blown out and discarded, and the papermaking machine and tools used in the raw material process should be cleaned.

[0081] 3-1.Paper manufacturing The papermaking process using the method of this embodiment is not particularly limited, and the method of this embodiment can be applied to known papermaking processes or papermaking processes that may arise in the future. The papermaking process preferably includes a preparation process, a papermaking process, and a water recovery process. As an example, FIG. 1 is shown, but the process of this embodiment is not limited to this. In this embodiment, the control unit can give various instructions to each unit, which allows appropriate countermeasures against pitch caused by macro-stickiness and more appropriate paper production.

[0082] Paper production in this embodiment will be described with reference to FIG. 9, however, the embodiment of the present invention is not limited thereto. The paper production (papermaking process) in this embodiment preferably includes a preparation process 2, a papermaking process 10, and a water recovery process for recovering water generated from each of these processes (see, for example, FIG. 9).

[0083] The target used in this embodiment may be one or more selected from process water in the papermaking process, pulp-containing materials (pulp-containing water, pulp-containing sheet, final paper product), and materials adhering to process equipment and tools. In the case of a target present in a process or equipment, it is preferable to select macro-sticky pitch countermeasure data for that process or equipment, and implement macro-sticky pitch countermeasures based on the countermeasure data. From multiple targets, a target with the highest amount of acrylate-based polymer may be selected, and macro-sticky pitch countermeasures may be implemented for that target.

[0084] In this embodiment, the process includes the steps of: confirming (detecting or measuring, etc.) the amount of acrylate-based polymerization product in the target; estimating, calculating, predicting, or quantifying the amount of macrostickiness based on the amount of acrylate-based polymerization product; selecting a macrosticky countermeasure appropriate for the target based on the target and the amount of acrylate-based polymerization product; and applying the amount of macrostickiness in the target to a level of macrosticky-derived pitch countermeasure appropriate for the target, and controlling the macrosticky-derived pitch countermeasure so that the amount of macrostickiness in the target is at that level. This makes it possible to more appropriately implement countermeasures against pitch caused by macro-stickiness. As an example of countermeasures against pitch caused by macro-stickiness, countermeasures against cleaning pitch caused by macro-stickiness will be described below, but countermeasures against pitch caused by macro-stickiness as described above, for example, countermeasures against pitch caused by macro-stickiness caused by fine particles, may include controlling the load (amount of power) when fine particles are formed, and in this embodiment, various countermeasures against pitch caused by macro-stickiness can be implemented as appropriate, so the present invention is not limited to these.

[0085] The preparation process 2 includes one or more steps selected from a dissolving step, a defibrating step, a dust removing step (cleaning step, screening step), a thickening step, and a beating step, and is preferably arranged in this order. In the preparation process 2, the raw material 1 such as waste paper can be made into a papermaking raw material through the dissolving step 21 and the beating step.

[0086] The papermaking process preferably includes at least an inlet 12, a paper layer forming process (wire part) 13, a wet paper dewatering process (press part) 15, and a wet drying process (dry part) 16, and more preferably the processes are arranged in this order. The inlet is configured to supply uniformly dispersed pulp raw material (for example, pulp concentration of about 0.5 to 1%) by uniformly spraying it onto the wire. Furthermore, the papermaking process may include a dust removal process (screening process) 11 configured to remove impurities from the pulp raw material before the inlet 12. Furthermore, after the dryer part, a calendar part, a reel, a cutter, a winder, etc. may be included. Through the papermaking process, paper 5 can finally be made. The papermaking process 10 (each of the processes 12 to 16) is connected to a water recovery process of a primary circulating water 19 and / or a secondary circulating water 20 that recovers water generated during papermaking such as filtered water (for example, pitch and pulp-containing water, etc.) as white water or recovered water 19.

[0087] In the water recovery process, the water used in the papermaking process 10 is recovered in a storage tank or storage device such as a white water silo 18. The recovered and recyclable water is circulated to the preparation process 2 and / or the papermaking process 10 (e.g., the dust removal process 11, etc.), and unnecessary water may be discharged outside the system as wastewater.

[0088] For example, in a countermeasure against cleaning pitch caused by macro-stickiness, a macro-sticky cleaning agent can be used in places or locations where pitch stains occur or adhere or are at risk of being generated or attached. The detergent can be applied to any step, location, equipment, and tools in the papermaking process. For example, it is preferable to add the detergent to papermaking tools such as wires, felts, canvases, rolls, and suction rolls, and it is also preferable to add the detergent to one or more selected from various tools, various chests, various devices, and various pipes in the papermaking process, and / or to showers for cleaning and / or preventing dirt in the papermaking process.

[0089] As a countermeasure against macro-sticky pitch cleaning, the place where the cleaning agent is added in the paper manufacturing process is not particularly limited, but examples thereof include adding or spraying the cleaning agent to the area where macro-sticky pitch stains are attached in the paper manufacturing process, or adding or directly spraying the cleaning agent into a tank or pipe installed in the vicinity, and an example of such a tank is a tank for shower water for cleaning or sealing. The cleaning agent may also be brought into contact with the area where macro-sticky pitch stains are attached using a device or mechanism for showering, spraying, spraying, immersion, washing, or the like.

[0090] Furthermore, as a countermeasure against pitch cleaning caused by macro-stickiness, it is preferable to apply a detergent to the papermaking process (preferably the papermaking machine and papermaking tools) where dirt becomes severe. The detergent is preferably used in one or more selected from the paper layer forming process 13, the wet paper dewatering process 15 in the papermaking process, and the white water silo (white water storage tank) 18 in the water recovery process.

[0091] When a countermeasure against pitch washing derived from macro-stickiness is used in the paper layer forming process 13 and / or the wet paper spinning process 15, it is preferable to contact chemical-containing water such as shower water, washing water, or spray water containing a detergent, such as 21a, 21b, or 21c, directly or indirectly with a tool such as a wire, felt, or press roll, using a device or mechanism such as shower, spray, or spray. Note that washing water or shower water not containing chemicals may be used, but it is preferable to use chemicals.

[0092] As a countermeasure against pitch cleaning caused by macro-stickiness, a cleaning agent is added to shower water and the shower water containing the agent is used in the papermaking process to clean papermaking tools such as papermaking felt in the papermaking process, thereby removing pitch stains caused by macro-stickiness. Also, by using shower water containing a cleaning agent in the papermaking process, it is possible to prevent the adhesion of pitch stains caused by macro-stickiness to papermaking felt and other tools in the papermaking process.

[0093] An example of a countermeasure for cleaning pitch derived from macro-stickiness according to the present embodiment includes, but is not limited to, a method for cleaning papermaking equipment. The wet sheet (e.g., solid content concentration 12 to 20% by mass) that has left the couch roll of the wire part is placed on a papermaking felt in the press part and squeezed between two press rolls. There is no particular limitation on the papermaking felt, but needle felts made of polyamide, polyester, wool, etc. are often used. The moisture content of the wet paper that leaves the press part is usually about 60% by mass, and the wet paper with reduced moisture content after the press part is dried in the dryer part. The papermaking felt that has released the wet paper travels under the press rolls while circulating, is washed during the process, and places the wet sheet on it again.

[0094] In the countermeasure against pitch washing, there is no particular limitation on the method of applying shower water containing a detergent to papermaking equipment. For example, one or more types selected from a full-width shower, a high-pressure moving needle shower, a low-pressure needle shower, etc. can be used. One aspect of the method for cleaning a papermaking felt is described below, but the present embodiment is not limited thereto, and the method may be a method for cleaning pitch stains derived from macro-stickiness on a papermaking felt or a method for preventing adhesion of pitch stains derived from macro-stickiness. In addition, in some or all of the following steps using shower water, it is preferable that the shower water appropriately contains the agent of the present embodiment. The papermaking felt is first cleaned by a high-pressure needle moving shower. The high-pressure needle moving shower can dissolve dirt attached to the outside of the papermaking felt by spraying shower water at a water pressure of 2,000 to 3,000 kPa from the inside of the papermaking felt while the spray nozzle moves in the width direction of the papermaking felt. The shower water that passes from the inside to the outside of the papermaking felt can be sucked in by a suction box. It is preferable that the high-pressure needle moving shower is provided with an interlock mechanism between the papermaking felt and the spray of shower water is stopped when the papermaking felt stops, thereby preventing damage to the papermaking felt.

[0095] Next, shower water is supplied from the full-width shower equipped with a fan nozzle from the inside across the entire width of the papermaking felt at a water pressure of 200 to 500 kPa, a sufficient amount of shower water is absorbed into the papermaking felt, foreign matter and clogging components are pushed out, and the foreign matter adhering to the surface of the papermaking felt can be removed by suction using a suction box. Furthermore, shower water is sprayed from the outside of the papermaking gel at a water pressure of about 800 kPa while moving a low-pressure needle moving shower in the width direction of the papermaking felt, and foreign matter adhering to the surface of the papermaking felt can be scraped off. Finally, shower water is supplied from the full-width shower provided on the inside of the papermaking felt and from the full-width shower provided on the outside, and the shower water is sucked up using one or more suction boxes to complete the washing of the papermaking felt.

[0096] This makes it possible to better clean pitch stains caused by macro-stickiness that adhere to the papermaking felt by spraying shower water containing the detergent onto the papermaking felt, and / or to better prevent the adhesion of pitch stains caused by macro-stickiness that adhere to the papermaking felt upon contact with the papermaking felt detergent.

[0097] 3-2. Other embodiments The management control system for macro-sticky countermeasures or macro-sticky-induced pitch state according to this embodiment is preferably provided with a control device for macro-sticky-induced pitch countermeasures or macro-sticky-induced pitch state management that includes at least the control unit described above. The management control system for macro-sticky-induced pitch countermeasures or macro-sticky-induced pitch state according to this embodiment may further include a communication unit that enables wireless and / or wired transmission and reception between the control unit or the device for macro-sticky-induced pitch countermeasures or macro-sticky-induced pitch state management control that includes the control unit and another unit or another device.

[0098] The method according to the present embodiment can be realized by a device including a CPU or the like in a device for executing the method, or a device for managing and controlling macro-sticky-induced pitch countermeasures or macro-sticky-induced pitch state (for example, a computer, a PLC, a server, a cloud service, etc.). The method according to the present embodiment can also be stored as a program in hardware resources including a recording medium (non-volatile memory (USB memory, SSD (Solid State Drive), etc.), HDD, CD, DVD, Blu-ray disc, etc.), and realized by a control unit. It is also possible to provide a device including the control unit or the system, such as a system for managing and controlling macro-sticky-induced pitch countermeasures or macro-sticky-induced pitch state, which is controlled by the control unit to manage and control macro-sticky-induced pitch countermeasures or macro-sticky-induced pitch state. The device for executing the method according to the present embodiment may include an input unit such as a keyboard, a communication unit such as a network, a display unit such as a display, etc., in addition to the control unit.

[0099] A device or system for managing measures against macro-sticky-induced pitch or management control of the state of macro-sticky-induced pitch can include an input unit such as a keyboard, a communication unit such as a network, an output unit such as a display, a storage unit such as a HDD, the measurement unit described above, etc. The device or system preferably includes an input unit, an output unit, and a storage unit, and further preferably includes a communication unit and / or a measurement unit. The input unit can receive user operations by an operator who performs the method of the present embodiment. The input unit can include, for example, a mouse and / or a keyboard. In addition, the display surface of the display device may be configured as an input unit that receives touch operations. The output unit can output the sap treatment status and related information (e.g., tables, diagrams, explanatory text, etc.) The output unit can be, for example, a display device that displays images, a speaker that outputs sounds, a printer that prints on a print medium such as paper, etc., but is not limited to these. The storage unit can store data input by an operator, and data set for performing countermeasures against pitch caused by macro-stickiness or management control of the pitch state caused by macro-stickiness. The storage unit may include, for example, a recording medium. Moreover, the system for managing and controlling the macro-sticky-induced pitch or the macro-sticky-induced pitch state according to this embodiment can be executed by utilizing a program and hardware. One embodiment (not shown) of the computer 1 according to one embodiment of the present invention is not limited to this, but may include at least a CPU as components of the computer 1, and may further include one or two components selected from a RAM, a storage unit, an output unit, an input unit, a communication unit, a ROM, and a measurement unit, among which it is preferable to include a RAM, a storage unit, an output unit, and an input unit, and further it is preferable to include at least one of a communication unit, a measurement unit, a ROM, etc. It is preferable that each component is connected by a bus as a data transmission path, for example.

[0100] The present technology may also employ the following configuration. [1] A method for estimating or determining the amount of macro-stickiness in paper production based on the amount of acrylate-based polymer contained in an object (preferably a controlled object) in paper production. [2] The method according to [1], wherein the objects to be managed are one or more selected from raw material slurry, dewatered cake, process water, deposits on equipment, final paper products, process water in a papermaking process, deposits on a papermaking machine, defects in final paper products, and solvent extracts thereof. [3] The method according to [1], wherein the target is one or more selected from raw material slurry, dehydrated cake, process water, deposits on equipment, final paper products, and solvent extracts thereof. The target is preferably one or more selected from a preparation process, a papermaking process, and a water recovery process. [4] The method according to [1] or [3], wherein the target is one or more selected from process water in a papermaking process, deposits on a papermaking machine, defects in a final paper product, and solvent extracts thereof. [5] The method according to any one of [1] to [4] above, wherein the amount of the acrylate-based polymer is measured by IR analysis. [6] The amount of the acrylate-based polymer is determined by the IR spectrum wave number of 1160 cm -1 and the relative intensity of the largest absorption peak observed in the vicinity thereof. [7] The amount of the acrylate-based polymer is [(a) IR spectrum wave number 1160 cm -1 and (b) the total value of the amounts of a plurality of absorption peaks selected from a single or a plurality of absorption peaks in the measurement wavelength range other than the largest absorption peak] for [IR spectrum wave number 1160 cm -1 The method according to any one of the above items (1) to (6), in which the total value of (b) is measured based on the amount of absorption peak at the IR spectrum wave number of 1160 cm and the amount of the largest absorption peak observed in the vicinity of the total value. -1 It may also be the total value of a plurality of absorption peak amounts, including or excluding the largest absorption peak found in the vicinity thereof. [8] The amount of the acrylate-based polymer is [IR spectrum wave number 600 to 4000 cm -1 of the total amount of absorption peaks at specific wavenumbers in the IR spectrum at wavenumber 1160cm -1 The method according to any one of the above [1] to [7], wherein the amount of absorption peak is measured based on a ratio of the amount of absorption peak observed in the vicinity of the largest absorption peak.

[0101] [9] A paper manufacturing method or a method for controlling the level of macro-stickiness countermeasures in paper manufacturing, which controls the amount of acrylate-based polymer contained in a target (preferably a controlled object) in paper manufacturing to a level that satisfies the macro-stickiness countermeasures in paper manufacturing, based on an increase or decrease in the amount of acrylate-based polymer contained in the target (preferably a controlled object) in paper manufacturing.

[10] A paper manufacturing method or a method for controlling the level of macro-stickiness countermeasures, which controls the amount of macro-stickiness obtained by the method according to any one of [1] to [8] so that the amount is at a level appropriate for macro-stickiness countermeasures in paper manufacturing.

[11] The method according to [9] or

[10] , wherein the macro-sticky countermeasure is to implement one or more mechanisms selected from a mechanism for removing foreign matter in the process water, a mechanism for reducing the size of foreign matter in the process water, a mechanism for cleaning the process, and a mechanism for adding a chemical to the process.

[12] The method according to any one of [9] to

[11] , wherein when the amount of acrylate-based polymer in a target (preferably a target for control) in paper production increases, the level of macro-sticky countermeasures is increased to promote the macro-sticky countermeasures, or when the amount of acrylate-based polymer in a target (preferably a target for control) in paper production decreases, the level of macro-sticky countermeasures is decreased to suppress the macro-sticky countermeasures.

[13] The method according to any one of [9] to

[12] above, further comprising measuring an increase or decrease in the amount of acrylate-based polymer contained in a target (preferably a target to be controlled) in paper production over time, and conducting feedback control to achieve a level for preventing macro-stickiness. EXAMPLES

[0102] The following examples and comparative examples are provided to illustrate the present invention, but the scope of the present invention is not limited to these examples.

[0103] [Test Example 1] The IR absorption spectra of acrylate, EVA, latex, and rosin sizing agents, which are common pitch components contained in paperboard and recycled paper raw materials, were measured (Figures 1 to 4). Comparing the IR absorption spectra of these acrylates, EVA, latex, and rosin sizing agents, -1Only the acrylate shown in Figure 1 had an absorption peak around the wavenumber of 1160 cm. -1 The nearby absorption peaks are suitable as indicators of acrylates.

[0104] <Infrared analysis equipment> FTIR-ATR device: JASCO Corporation, FT / IR4100 (Fourier transform, area occupancy calculation software: built-in software) Permeability measurement method: Liquid membrane method: A solution of benzene / chloroform (1:1) mixed solvent was placed on a KBr plate and dried to measure the film. Measurement may also be performed by infrared analysis, in which an object (such as a quality control object) is irradiated with infrared light and the intensity of reflected light is measured.

[0105] [Test Examples 2-1 to 2-3] For test example 2, a solvent extract of the raw material slurry of a cardboard paper manufacturing machine (sample 2-1), a solvent extract of the filtrate of the raw material slurry of a cardboard paper manufacturing machine (sample 2-2), and macro-sticky material collected from the raw material slurry of a cardboard paper manufacturing machine (sample 2-3) were used.

[0106] <Characteristics of raw material slurry for cardboard manufacturing machines> The raw material slurry used in this test example was a sample taken from the finished raw material before the addition of internal additives. The properties of the raw material slurry were SS concentration 3.7%, pH 7.1, and electrical conductivity 238 mS / m. The same raw material slurry was used in the cardboard manufacturing machine for Samples 2-1, 2-2, and 2-3.

[0107] <Method of preparing solvent extract of raw material slurry> 1 (g) of raw material slurry from a cardboard manufacturing machine, dried at 105°C for 3 hours, was mixed with 50 mL of a mixed solvent of benzene and chloroform (1 vol:1 vol) (extraction temperature 20-25°C) and extracted for 60 minutes under static conditions. After the extraction, the liquid was lightly dispersed and the supernatant was used as the sample.

[0108] <Method of preparing solvent extract of raw slurry filtrate> The raw material slurry for the cardboard manufacturing machine was filtered through Whatman No. 41 filter paper with a pore size of 20 μm. 2 The filtrate (100 mL) was filtered using a sample amount of 0.5 mL per sample, and evaporated to dryness at 105°C for 24 hours. This was mixed with 5 mL of a mixed solvent of benzene and chloroform (1 vol:1 vol) and left to stand for 60 minutes for extraction. After the extraction, the liquid was lightly dispersed and the supernatant was used as the sample. <Method of extracting macro-sticky particles from raw slurry> Sticky particles were selected from the particles captured through a 150 μm slit screen in accordance with JIS P8231:2005, which was collected from the raw material slurry (10 L) of a cardboard paper manufacturing machine, and dried at 105°C for 3 hours. 0.1 g of these particles were mixed with 2 mL of a mixed solvent of benzene and chloroform (1 vol:1 vol) and left to stand for 60 minutes for extraction. After the extraction, the liquid was lightly dispersed and the supernatant was used as the sample.

[0109] In Test Example 2-1, the IR absorption spectrum of the solvent extract of the raw material slurry of the cardboard manufacturing machine has a wave number of 1160 cm -1 Almost no absorption peak was observed around this range (Figure 5). Test Example 2-1 shows that there is very little acrylate in the raw material slurry of the cardboard manufacturing machine. In addition, in Test Example 2-2, the raw material slurry of the cardboard manufacturing machine was filtered through Whatman's No. 41 filter paper with a pore size of 20 μm, and the IR absorption spectrum of the solvent extract of the filtrate showed a wave number of 1160 cm -1 No absorption peak was observed around this point (not shown). Test Example 2-2 shows that there is little acrylate present as fine pitch dispersed in the papermaking process water. Furthermore, Test Example 2-2 reflects the nature of acrylate, which is difficult to finely grind because it has elasticity even at room temperature.

[0110] On the other hand, in Test Example 2-3, the macro-stickiness in the raw material slurry of the cardboard manufacturing machine has a wave number of 1160 cm-1 A strong absorption peak was observed around this peak, and acrylate was the main component (Figure 6). Test Example 2-3 shows that macro-sticky, which is an undisintegrated product of hydrophobic adhesive substances, is the main source of acrylate-based pitch.

[0111] [Test Example 3] In Test Example 3, a mixture of the solvent extract of the raw material slurry of the cardboard manufacturing machine used in Test Example 2-1 and acrylate (Resitex A-6001, manufactured by Resitex) mixed in a ratio of 1:9 to 9:1 as solids, a solvent extract of the raw material slurry of the additive-free cardboard manufacturing machine used in Test Example 2-1 alone, and acrylate alone were used as samples. Specifically, a benzene and chloroform mixed solvent (1 vol:1 vol) extract (solid concentration 0.03%) of the dried material of the cardboard manufacturing machine raw material slurry was mixed with a benzene and chloroform mixed solvent (1 vol:1 vol) extract (solid concentration 0.06%) of acrylate dried at 105°C for 24 hours in a ratio of 1:9 to 9:1 as solids, and each single solvent extract was used as a sample. The wave number of each of these samples was 1160 cm -1 Absorption peak area" and "Acrylate wave number 600-4000 cm -1 Obtain data for each sample in relation to the total area of ​​the absorption peak in the IR absorption spectrum of each sample at wave number 1160 cm -1 The absorption peak area ratio (%) was calculated. Specifically, -1 Absorption peak area / Wave number of acrylate 600-4000 cm -1 Total area of ​​absorption peaks in the IR absorption spectrum of 1160 cm × 100 = wave number -1 Absorption peak area ratio (%). Wave number 1160cm -1 Absorption peak area, total area of ​​absorption peaks in IR absorption spectrum, wave number of 1160 cm -1 The absorption peak area ratio was calculated using area occupancy calculation software for an FTIR-ATR device (manufactured by JASCO Corporation). -1 Absorption peak area" is also included. For each sample, the wave number of each sample is 1160 cm -1 The relationship between the absorption peak area ratio (%) and the acrylate content (%) is shown in FIG.

[0112] [Table 1]

[0113] Acrylate wave number 600~4000cm -1 The total area of ​​the absorption peak in the IR absorption spectrum of -1 The proportion of absorption peaks in the vicinity of the acrylate content increased according to the proportion of acrylate in the measured sample (each specimen) (Figure 7). Correlation coefficient: 0.98, regression line: acrylate content = 8.5 × acrylate wavenumber 600-4000 cm -1 The total area of ​​the absorption peak in the IR absorption spectrum of -1 Percentage of nearby absorption peaks - 9.9. According to Test Example 3, the wave number is 600 to 4000 cm -1 The total area of ​​the absorption peak in the IR absorption spectrum of -1 The percentage of nearby absorption peaks can be used as a metric for the percentage of acrylate content.

[0114] Then, samples were taken at a cardboard manufacturing site where waste paper was recycled, and the macro-stickiness (mm 2 The amount of defects (pitch / kg) in the cardboard base paper was measured, and the number of defects (pitch / day) due to pitch in the cardboard base paper was counted. Furthermore, n locations of the defective parts of the cardboard base paper were sampled, and a defect solvent extract (average value divided by n was used) was obtained using the method of [Test Example 1]. This defect solvent extract was used for IR analysis measurement using the method of [Test Example 3], and the IR spectrum wave number of the defect solvent extract was 1160 cm. -1 Absorption peak area / defective solvent extract IR spectrum wavenumber 600-4000 -1 Absorption peak area (total area)" from "Defective solvent extract IR1160 -1The peak area ratio was calculated using the area occupancy calculation software for the FTIR-ATR device (manufactured by JASCO Corporation). The total area (total value) was calculated using the IR spectrum wave number of 1160 cm of the defective solvent extract. -1 Absorption peak areas are included.

[0115] In this way, based on one sample, the number of pitch defects (pieces / day) and the amount of macro-stickiness of the raw slurry (mm 2 / kg) and "Defective Solvent Extraction IR1160 -1 The three data points, "peak area ratio" and "peak area ratio", were obtained. This data collection was carried out for about three months, with a total of 78 samples. And, "Defective Solvent Extraction IR1160 -1 The peak area ratio was classified into a group of "1% or more" and a group of "less than 1%," and the correlation between them (simple regression equation) was examined (see Figure 8). As a result, by setting the classification at "1% or more," the correlation coefficient was R 2 =0.6.

[0116] Therefore, "IR1160 -1 "Peak area ratio around 1160 cm in the IR spectrum" -1 It was confirmed that using the relative intensity of "the largest absorption peak amount seen in the vicinity of the peak" as a criterion is important for macro-sticky pitch countermeasures and macro-sticky pitch condition management even at the site. Furthermore, it was made clear that by setting appropriate numerical conditions for the criterion according to the conditions of each site or process, it is possible to improve macro-sticky pitch countermeasures and macro-sticky pitch condition management.

[0117] [Test Example 4: Cleaning of paper machine tools based on the macro-sticky estimator of the present embodiment] In Test Example 4, the deposits on the tools of the papermaking machine were measured with a non-contact infrared analyzer. The ratio of the absorption peak at a wave number of 1160 cm-1 to the total area of ​​the absorption peaks of the IR absorption spectrum at wave numbers of 600 to 4000 cm-1 was 6.0%. From the simple regression equation obtained from Table 1, the ratio of the amount of (meth)acrylate in the deposits on the tools of the papermaking machine was calculated to be 41.1%, which was estimated as the amount of macro-stickiness. As a countermeasure against macro-stickiness, the amount of polyoxyethylene stearyl propylene diamine (EO = 15 mol) added as a drug to the felt shower water was increased from 20 mg / L to 50 mg / L. The amount of macro-stickiness after spray washing was reduced to 24.1% based on the IR absorption spectrum analysis as above. Since it did not fall within the range of 10%, the amount of polyoxyethylene stearyl propylene diamine (EO = 15 mol) added to the felt shower water was increased to 100 mg / L. After that, the amount of macro-stickiness was estimated, and as it was 7.1%, which was within the range, the amount was continued to be increased. After that, as the estimated amount of macro-stickiness was 1% or less, it was determined that the macro-stickiness in the raw material had decreased, and the amount of polyoxyethylene stearyl propylene diamine (EO = 15 mol) added was returned to the normal amount of 20 mg / L for felt shower water, and as the estimated amount of macro-stickiness was 5.4%, which was within the range, the amount of polyoxyethylene stearyl propylene diamine (EO = 15 mol) added to felt shower water was continued at 20 mg / L. [Explanation of symbols]

[0118] 1 raw material, 2 preparation process, 5 paper, 10 papermaking process, 11 dust removal process, 12 inlet, 13 wire part, 14 wet sheet, 15 press part, 16 dry part, 17 white water, 18 white water silo, 19 primary circulating water, 20 secondary circulating water, 22 pitch control agent

Claims

1. A method for estimating the amount of macro-stickiness in paper manufacturing based on the amount of acrylate-based polymerized matter contained in the controlled material in paper manufacturing.

2. The method for estimating the amount of macro-stickiness in paper manufacturing according to claim 1, wherein the objects to be managed are one or more selected from raw material slurry, dehydrated cake, process water, deposits on equipment, final paper products, process water in a papermaking process, deposits on a papermaking machine, defects in final paper products, and solvent extracts thereof.

3. The method for estimating the amount of macro-stickiness in paper production according to claim 1 or 2, wherein the amount of acrylate-based polymer is measured by IR analysis.

4. The amount of the acrylate polymer is measured by an IR spectrum wave number of 1160 cm －１ 3. The method for estimating the amount of macro-stickiness in paper manufacturing according to claim 1 or 2, wherein the amount of macro-stickiness is measured based on the relative intensity of the largest absorption peak amount observed in the vicinity of said absorption peak amount.

5. The amount of the acrylate polymer is determined by the following: －１ and (b) the total value of the amounts of a plurality of absorption peaks selected from a single or a plurality of absorption peaks in the measurement wavenumber range other than the largest absorption peak, or (c) the total value of the amounts of a plurality of absorption peaks selected from a single or a plurality of absorption peaks in the measurement wavenumber range other than the largest absorption peak, －１ 3. The method for estimating the amount of macro-stickiness in paper manufacturing according to claim 1 or 2, wherein the amount of macro-stickiness is measured by measuring the amount of the largest absorption peak observed in the vicinity of said absorption peak.

6. The amount of the acrylate polymer is determined by the IR spectrum wave number of 600 to 4000 cm －１ [IR spectrum wave number 1160 cm] －１ 3. The method for estimating the amount of macro-stickiness in paper manufacturing according to claim 1 or 2, wherein the amount of macro-stickiness is measured by a ratio of the amount of absorption peak of the paper to the amount of the largest absorption peak observed in the vicinity of the absorption peak.

7. A paper manufacturing method in which the amount of acrylate polymer contained in the controlled material in paper manufacturing is controlled to a level sufficient for preventing macro-stickiness in paper manufacturing, based on an increase or decrease in the amount of acrylate polymer contained in the controlled material in paper manufacturing.

8. The paper manufacturing method according to claim 7, wherein the macro-sticky countermeasure is to implement one or more of the following mechanisms: a mechanism for removing foreign matter in the process water, a mechanism for reducing the size of foreign matter in the process water, a mechanism for cleaning the process, and a mechanism for adding chemicals to the process.

9. The amount of acrylate polymers under management in paper manufacturing is In the case of an increase, increase the level of macro-stickiness measures to promote macro-stickiness measures, or 9. The paper manufacturing method according to claim 7 or 8, wherein in the case of a decrease, the level of the macro-sticky countermeasure is lowered to suppress the macro-sticky countermeasure.

10. 9. The paper manufacturing method according to claim 7 or 8, further comprising measuring an increase or decrease in the amount of acrylate polymer contained in the controlled material in the paper manufacturing process over time and feedback-controlling the level of the macro-sticky countermeasures.

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