Method for estimating the amount of large adhesive in the manufacturing of paper and method for manufacturing paper

Abstract

The invention provides a technology of a more appropriate resin countermeasure in a paper manufacturing process. Provided is a method for estimating the amount of large stickies in paper manufacturing on the basis of the amount of acrylate-based polymers contained in a management subject in paper manufacturing. Provided is a method for manufacturing paper, in which the level of large stickies countermeasures in paper manufacturing is adjusted on the basis of an increase or decrease in the amount of an acrylate-based polymer contained in a management subject in paper manufacturing.

Description

Technical Field

[0001] This invention relates to a method for estimating the amount of macrosticky in paper manufacturing and a paper manufacturing method, etc. Background Technology

[0002] Resins are contained in pulp water during papermaking and cause resin problems. Generally, resin refers to organic substances primarily composed of pulp-derived resin components, synthetic pressure-sensitive adhesives from recycled waste paper, or hydrophobic pressure-sensitive adhesives used as additive chemicals in the papermaking process. Resins contained and accumulated in pulp water used as raw materials for papermaking are a cause of resin problems, such as frequent spotting or paper breakage and deterioration of product quality due to agglomerated resin clumps, reduced production efficiency, and deteriorated dewatering capacity due to resin adhering to the paper machine, papermaking tools, or facilities in the papermaking process.

[0003] Regarding resin issues, measures include: implementing resin problem countermeasures (such as coating or screening facilities with resin or removing resin contaminants with cleaning agents); mechanical countermeasures (such as miniaturizing resin blocks using kneaders or fine grinders); or using chemicals (such as externally added chemicals (such as tool cleaners) or internally added chemicals (such as fixatives, dispersants, anti-tackifiers, or degrading enzymes)); and adjusting or controlling operating conditions (such as regular machine cleaning or controlling the amount of excess white water or waste slurry discharged externally).

[0004] For example, in patent documents 1 to 5, methods for determining and continuously measuring resin content using fluorescent dyes in paper manufacturing have been proposed.

[0005] [List of Citations]

[0006] [Patent Literature]

[0007] [Patent Document 1]

[0008] WO2007 / 082376

[0009] [Patent Document 2]

[0010] WO2008 / 104576

[0011] [Patent Document 3]

[0012] PCT International Publication Japanese Translation No. 2012-521009

[0013] [Patent Document 4]

[0014] Japanese Patent Application Publication No. 2017-009564

[0015] [Patent Document 5]

[0016] PCT International Publication Japanese Translation No. 2016-535244 Summary of the Invention

[0017] [Technical Issues]

[0018] However, the inventors believe that in the methods for determining and continuously measuring resin quantity using fluorescent dyes, such as those in Patent Documents 1 to 5, there are many situations where a filtration process is required when using this method. Therefore, the fact that hydrophobic substances that are not pressure-sensitive adhesives (such as plastic resins) and water-soluble hydrophobic substances (such as surfactants) are also measured, and the fact that differences in resin quality (composition) during paper manufacturing are not detected, are problems in terms of resin countermeasures.

[0019] Therefore, the main objective of this invention is to provide a technique for more appropriate resin countermeasures in paper manufacturing processes.

[0020] Solution to the problem

[0021] As a result of further research, the inventors discovered that acrylate polymers, a major resin component derived from waste paper, are not detected in finely dispersed resins in the primary circulation system of the paper machine or in the process water during raw material handling, but only in large adhesives. Based on this fact, the inventors believe that countermeasures specifically targeting large adhesives are effective regarding resin obstacles primarily related to acrylate polymers, and that resin countermeasures are effectively implemented by controlling the level of achievement of large adhesive countermeasures based on the increase or decrease of acrylate polymers in the managed objects (spots or adhering substances, etc.) during paper manufacturing.

[0022] Furthermore, as a result of further research, the inventors discovered that the increase or decrease of acrylate polymers in the object can be more advantageously determined based on the IR spectral analysis results. More specifically, the inventors discovered that the increase or decrease of acrylate polymers in the object can be determined more advantageously based on the IR spectral analysis results. -1 Wavenumber (unique for acrylate polymers in resin components derived from waste paperboard raw materials) and the absorption intensity at nearby wavenumbers determine the increase or decrease of acrylate polymers in the object, and furthermore, [1160cm] can be used more accurately and simply. -1 The percentage of the area or height of the peak at and near the wavenumber relative to the area or height of all absorptions in the IR spectrum is used to detect and measure the increase or decrease of acrylate polymers in an object.

[0023] Furthermore, the inventors believe that, as a countermeasure against large adhesives, it is preferable to use one or more of the following: removal with a sieve or cleaning agent (increasing the retention rate); enhanced cleaning, such as expanding the tool cleaning spray head or increasing the pressure or temperature of the spray water; enhanced externally added chemicals, such as cleaning agents or anti-adhesion agents for tools (such as wetting or drying parts); treatment enhanced with internally added chemicals (such as anti-adhesion agents for large adhesives); and so on.

[0024] As described above, as a result of further research, the inventors focused on the relationship between acrylate polymers and large adhesives in resins, and were able to elucidate this relationship. Therefore, it was newly discovered that the amount of large adhesives in a controlled object can be estimated based on the acrylate polymers in that object during paper manufacturing, and the use of this relationship may make countermeasures against large adhesives in paper manufacturing more advantageous. Furthermore, this facilitates the management of products or equipment (e.g., quality control or cleaning management) in paper manufacturing. In other words, the present invention is as follows.

[0025] This invention enables a method for estimating the amount of large adhesives in paper manufacturing based on the amount of acrylate polymers contained in the controlled objects in paper manufacturing.

[0026] This invention enables the provision of a method for manufacturing paper in which measures to control large adhesives in paper manufacturing are achieved to a certain level based on the increase or decrease of the amount of acrylate polymer contained in the controlled object in paper manufacturing.

[0027] Advantages of the present invention

[0028] According to the present invention, there is a technology that can provide more appropriate resin countermeasures in the paper manufacturing process. Attached Figure Description

[0029] Figure 1 It is the IR absorption spectrum of an acrylate-based pressure-sensitive adhesive.

[0030] Figure 2 This is the IR absorption spectrum of EVA.

[0031] Figure 3 This is the IR absorption spectrum of SBR-based latex.

[0032] Figure 4 This is the IR absorption spectrum of rosin sizing agent.

[0033] Figure 5 It is the IR absorption spectrum of the solvent extract of the raw material slurry.

[0034] Figure 6 It is the IR absorption spectrum of a large adhesive.

[0035] Figure 7 This shows the acrylate content ratio (%) and the IR absorption spectrum at 1160 cm⁻¹. -1 A view showing the relationship between the absorption peak area ratios at wavenumbers.

[0036] Figure 8 This is a view showing the relationship between the amount of large adhesive residues in the raw material and the number of resin spots. The accompanying drawing shows the relationship at IR 1160cm. -1 A graph (black circle) of the spot solvent extract with an absorption peak area ratio of less than 1%, its correlation coefficient, at IR 1160 cm⁻¹. -1 A graph (white square) of the spot solvent extract with an absorption peak area ratio of 1% or more, and its correlation coefficient.

[0037] Figure 9 This is a schematic diagram illustrating the various processes of paper manufacturing in this invention. Detailed Implementation

[0038] Embodiments of the invention will be described below. The embodiments described below will illustrate an example of a typical embodiment of the invention, and this does not mean that the scope of the invention should be construed as limited. The upper limit (indicated by "or less than etc.") and lower limit (indicated by "or greater than etc.") of the numerical range (indicated by "etc.") can be arbitrarily combined as needed.

[0039] 1. The technique for controlling large adhesives according to the present invention

[0040] In recent years, the increased recycling rate of waste paper has led to the more frequent reuse of low-grade waste paper containing a large amount of contaminants. Typical examples of contaminants in waste paper raw materials include pressure-sensitive adhesives such as labels or seals that adhere to waste paper, pressure-sensitive adhesives derived from tapes, pressure-sensitive adhesives, or adhesives used to form boxes. These pressure-sensitive adhesive contaminants are contained in the process water used in papermaking or adhere to papermaking facilities (equipment, tools, or manufacturing areas, etc.) and are a major cause of resin problems, especially in papermaking machines.

[0041] The conventional main components of resins are resin acids derived from pulp, rosin derived from sizing agents (which are internally added chemicals), and latex containing AKD (alkyl ketene dimer), ASA (alkenyl succinic anhydride), or SBR (styrene-butadiene rubber) as a main component. However, recently, the main components of resins have come from pressure-sensitive adhesive contaminants in waste paper, and polymers such as EVA (ethylene-vinyl acetate copolymer) and acrylate polymers have become dominant because these components originate from pressure-sensitive adhesive contaminants.

[0042] Generally, "resin problems" refer to the deterioration of paper product quality or reduced operating efficiency of the papermaking machine due to the increased occurrence of resin spots, paper breakage, or contamination of the papermaking machine, leading to the degradation of tools such as forming wires, felt, or canvas. In some cases, resin problems caused by papermaking machine contamination may also be caused by sludge or scale, rather than resin itself; however, in paperboard mixed with a high percentage of waste paper, the quality and quantity of contaminants from waste paper vary significantly, and therefore, resin problems originating from contaminants are considered the most difficult to control among those originating from papermaking machine contamination.

[0043] Typically, various countermeasures are implemented to address resin problems, such as one or more of the following: coating facilities with resin; using facility countermeasures, such as removing resin contaminants with screens or cleaning agents, or breaking down resin clumps with kneaders or grinders; using chemical countermeasures, such as externally added chemicals (e.g., tool cleaning fluids, fixatives, dispersants, anti-tackifiers, or degrading enzymes); and adjusting operating conditions (e.g., routine machine cleaning) or increasing the amount of excess white water or waste pulp discharged externally. As described above, in the paper manufacturing site, various facilities, chemicals, and adjustments to operating conditions are prepared for resin countermeasures, and these countermeasures are implemented. However, resin countermeasures are accompanied by disadvantages, such as increased costs (e.g., capital investment, electricity costs, or chemical costs), increased amounts of spilled raw materials, extended non-operating time, and reduced strength of paper products, and therefore it is desirable to implement resin countermeasures with minimal necessity.

[0044] Furthermore, resins derived from waste paper raw materials vary significantly in quality (composition) and quantity, but the reasons for these variations are often not fully understood, leading to monotonous countermeasures in many cases. In particular, because the quality (composition) of the resin is difficult to perceive simply and quickly, it is difficult to assume that resin countermeasures suitable for the resin's quality (composition) are being implemented in real time.

[0045] Therefore, the purpose of this technology is to provide a new resin countermeasure technique, and more preferably, a new large adhesive countermeasure technique.

[0046] Furthermore, the objective of this technology is to provide resin countermeasures that enable appropriate countermeasures to be implemented when needed, rather than monotonous resin countermeasures, and to address even variations originating from waste paper. Additionally, the objective of this technology is to provide new techniques for analyzing resin levels to more appropriately implement resin countermeasures in the paper manufacturing process. Moreover, the objective of this technology is to provide techniques for more easily and quickly determining increases or decreases in the amount of acrylate polymers in paper manufacturing, and techniques for achieving various responses (preferably real-time responses and automatic control responses) to resin problems originating from acrylate polymers.

[0047] Resins used in paper manufacturing processes are broadly classified into fine resins and large adhesives. Papermaking raw materials, such as paperboard which uses waste paper as a primary raw material, include acrylate-based components, SBR-based components, natural rubber-based components, polyurethane-based components, and silicone-based components, which are components of pressure-sensitive adhesive tapes or labels. These components are not easily miniaturized due to shared processes. However, the inventors have discovered that a large number of acrylate-based components are present in paper applications, and that almost all pressure-sensitive adhesives in large adhesives are acrylate-based. In other words, the inventors have found that almost all large adhesives contained in pulp, dewatered filter cake, or process water in paper manufacturing processes and facilities where waste paper is used as a raw material are acrylate-based pressure-sensitive adhesives.

[0048] Furthermore, acrylate polymers not only possess high pressure-sensitive adhesion but also high elasticity, making them difficult to disperse finely and undetectable from fine resins dispersed in papermaking process water. Additionally, there are numerous instances where acrylate polymers are included in spots that contribute to paper quality degradation or in substances adhering to tools that contribute to productivity degradation. Moreover, large adhesives differ from fine resins dispersed in process water not only in their different components but also in their large size and high pressure-sensitive adhesion or elasticity; therefore, appropriate countermeasures for large adhesives are needed, different from those for other resin components.

[0049] Based on the above description, the inventors estimate that large adhesive residue countermeasures are effective for acrylate polymer-dominated resins. Furthermore, the inventors are concerned with the presence of acrylate polymers in the target material, and therefore, based on the presence of acrylate polymers in the target material, provide a technique for more suitable large adhesive residue countermeasures in paper manufacturing processes.

[0050] Furthermore, the inventors have discovered that, as a means or method for identifying acrylate polymers present in controlled objects during paper manufacturing, acrylate polymers can be selectively detected and quantitatively measured via IR analysis. The inventors have found that this allows for the estimation of the amount of large adhesives, which are pressure-sensitive adhesive foreign bodies present or generated during paper manufacturing, based on the amount of acrylate polymers present in controlled objects during paper manufacturing.

[0051] Furthermore, the inventors have discovered that the content of large adhesives in a subject can be sensed based on the amount of acrylate polymers in the subject, and more preferably, the increase in risk caused by large adhesives can be sensed based on an increase in the proportion of acrylate polymers. Furthermore, the inventors have realized that because the amount of acrylate polymers in a subject can be sensed more quickly, countermeasures against large adhesives can be implemented more appropriately, and more preferably, the management and control of the state of large adhesives can be achieved in paper manufacturing, related processes, and the paper manufacturing site including facilities.

[0052] In this technology, acrylate polymers are preferably used as an indicator. In this technology, "acrylate polymers" are also called acrylate polymers and include acrylate homopolymers polymerized from the same components (monomers, oligomers, or polymers) and copolymers obtained by polymerizing two or more different copolymerizable components (monomers, oligomers, or polymers), and copolymerizable components other than acrylates may also be used in the polymerization of copolymers.

[0053] In this technology, it is preferable to adjust the level of effectiveness of countermeasures against large adhesives, which are the main source of acrylate polymers, based on the increase or decrease of the acrylate polymer contained in the object (e.g., the determination of the paper product or the substance adhering to the paper machine). This enables efficient countermeasures against resin-derived spots or paper breakage, contamination of the paper machine, etc.

[0054] This technology enables the provision of more appropriate resin countermeasures in paper manufacturing processes.

[0055] In this technology, the focus is on acrylate polymers as the cause of resin problems requiring resin countermeasures in the pollutants, which allows for the estimation of the amount of large adhesives contained in the object. Furthermore, this technology focuses on the relationship between acrylate polymers and large adhesives, which allows for the appropriate implementation of resin countermeasures to address variations in waste paper raw materials, rather than a monotonous approach.

[0056] Furthermore, this technology can easily and quickly determine increases or decreases in the amount of acrylate polymers. This simple and rapid determination of increases or decreases in the amount of acrylate polymers enables real-time response and / or automatic control of resin problems originating from acrylate polymers.

[0057] Furthermore, according to this technology, the contribution of acrylate polymers in the resin component can be converted into a numerical value. By using data on the contribution of acrylate polymers in the resin component of the managed object, obtained through continuous measurement, the level of large adhesive residue countermeasures can be automatically adjusted. According to this technology, in the event of a resin obstacle originating from acrylate polymers, it becomes possible to achieve an efficient resin obstacle countermeasure by intensifying the handling of large adhesive residue countermeasures.

[0058] 2. The method according to the present invention for estimating the amount of large adhesives in paper manufacturing.

[0059] This embodiment provides a method for estimating the amount of large adhesives in paper manufacturing based on the amount of acrylate polymers contained in the managed objects. Furthermore, this embodiment can be used as a method for estimating the state of large adhesive contamination, a method for measuring the amount of large adhesives, or a method for determining the amount of large adhesives. Additionally, this embodiment can also be used as an indicator for large adhesive countermeasures or resin countermeasures. Furthermore, this embodiment can convert the contribution of acrylate polymers in resin components into a numerical value.

[0060] <Management Objects in Paper Manufacturing>

[0061] The term "managed object in paper manufacturing" used in this embodiment is not particularly limited, as long as the object may contain acrylate polymers present in paper manufacturing, the processes involved, and the paper manufacturing site (such as facilities (equipment, parts, tools, etc.)) (hereinafter also referred to as "site objects"). Examples include raw material pulp, dewatered filter cake, various process waters, pulp-containing substances used, generated, or formed in the process (e.g., pulp-containing water or pulp-containing sheets, etc.), adhering substances (e.g., substances adhering to tools or facilities in various processes, various equipment, process areas, etc.), paper products, solvent extracts thereof, etc., and one or more of these may be selected. The managed object is preferably an object substance that can be used as an indicator for product quality control (quality control object), but it can also be an object substance that can be used as an indicator for the cleanliness management of facilities, etc. (cleanliness management object), or it can be a monitoring object used to monitor the degree of large adhesives. Depending on the circumstances, object substances containing large adhesives may be appropriately set as managed objects, and there are no particular limitations on managed objects.

[0062] In addition, the objects used in this embodiment can be substances originating from the same site or different sites, and can be a single substance or multiple substances.

[0063] More preferably, the object is selected from one or more of the following: one or more raw material pulps (the raw material pulps are selected from preparation processes, papermaking processes, and water recycling processes), dewatered filter cake, process water, substances adhering to facilities (e.g., apparatus, tools, or areas), final paper products, and solvent extracts thereof. Additionally, examples of objects to be managed in papermaking processes include various types of process water, apparatus and tools used in various processes, and in papermaking processes, raw material preparation processes (preparation processes) and / or papermaking processes are preferred.

[0064] The object is more preferably selected from one or more of the following: raw material pulp, dewatered filter cake, process water for papermaking, substances adhering to the paper machine, spots in the final paper product and their solvent extracts.

[0065] Typically, pulp-containing materials contain resins such as large adhesives, therefore, pulp-containing materials present in the paper manufacturing process are preferred. Furthermore, pulp-containing materials containing large adhesives come into contact with equipment and tools used in various processes within the papermaking process, therefore, such equipment and tools are preferred. Additionally, due to the formation of spots caused by large adhesives (spots caused by large adhesives adhering to the paper machine or process facilities), paper breakage, product quality deterioration, and dewatering capacity deterioration occur, therefore, pulp-containing water and / or pulp-containing sheets and / or final paper products generated or formed in the papermaking process are preferred. Typically, pulp-containing water used as pulp raw material in the papermaking process is said to have a pulp concentration of approximately 0.1% to 5%.

[0066] Solvent extracts can be generated using one or more objects. There are no particular limitations on the solvent used in generating solvent extracts from objects, but organic solvents, and more preferably hydrophobic organic solvents, are preferred from the perspective of easily dissolving and extracting the (meth)acrylates contained in the object. Commonly used methods for extracting lipid components (examples of which include ether extraction methods), methods for extracting organic solvents containing chloroform (e.g., chloroform extraction methods, chloroform-benzene extraction methods, chloroform-methanol extraction methods, etc.), etc., are preferred, and liquid-liquid extraction (water-hydrophobic solvents, etc.) can be used appropriately.

[0067] As organic solvents, one or more of the following can be used, for example: hydrocarbon solvents, such as n-hexane; aromatic solvents, such as benzene; alcohol solvents, such as ethanol; ketone solvents, such as acetone; ether solvents, such as diethyl ether; alkyl halide solvents, such as chloroform; and mixtures thereof.

[0068] There are no particular restrictions on the extraction temperature, but it is preferably 10°C to 60°C, and more preferably 20°C to 40°C.

[0069] <Apparatus or method for identifying acrylates>

[0070] The apparatus or method used in this embodiment to confirm the presence of acrylate is not limited, as long as an increase or decrease in the amount of acrylate-based polymer can be sensed and confirmed by the apparatus or method to be related to the large adhesive. For example, one or more of the following can be used: visual observation, images, odor, pressure-sensitive adhesion, elasticity, electrical conductivity, vibration conduction, heat transfer, adhesion amount, color, thermal decomposition, chemical analysis, instrumental analysis, and adhesion location. The apparatus or method enabling confirmation can be well-known or can be a means or method to be developed in the future.

[0071] Among these, an apparatus or method capable of analyzing the increase or decrease in the amount of acrylate polymers is preferred from the perspective of being faster and simpler, and can be of any contact or non-contact type. In this case, the amount of acrylate polymers can be converted into numerical values ​​using automated calculation software provided in various apparatuses.

[0072] Furthermore, from the perspective of reproducibility and simplicity, a measuring instrument is preferred as an apparatus or method capable of analyzing increases or decreases in the amount of acrylate polymers. Moreover, an apparatus or method for optical analysis is preferred. Optical analysis is not particularly limited and may be selected from one or more of Raman analysis, ultraviolet analysis, visible light analysis, and infrared analysis, and may be of the transmission or reflection type.

[0073] In the aforementioned optical analysis, infrared analysis is preferred, and infrared spectroscopy (also known as "IR") is even more preferred because it facilitates and advantageously detects and quantifies acrylate polymers and their quantities. Among the means or methods used for confirmation in this embodiment, due to their high versatility, it is preferable to use the IR spectrum of the object to evaluate spots, adhering substances, solvent extracts, etc., in paper manufacturing.

[0074] Based on differences in optical system mechanisms, infrared spectra are classified into dispersive and Fourier transform types. Any of these types can be used, with Fourier transform being preferred. Additionally, infrared spectra can be reflective, and from the perspective of being able to quickly and easily measure objects (such as materials attached to paper machines in a papermaking environment), non-contact reflective types are more preferable.

[0075] There are no particular limitations on the measurement methods used for infrared spectra. Examples include transmission measurement methods such as the Nujol method, liquid film method, and plate method; reflection measurement methods such as reflection absorption method, external reflection method, and attenuated total reflection method; and one or more of these items can be selected.

[0076] In this embodiment, the acrylate polymer used as an indicator has a 1160 cm⁻¹ IR absorption spectrum. -1 It has absorption peaks at and near wavenumbers, and at 1160 cm⁻¹. -1 The wavenumber and the absorption peak at nearby wavenumbers are absorption peaks not observed in the raw materials used for paper (especially other resin components contained in waste paper raw materials). Therefore, this characteristic absorption peak region is suitable as an indicator of the acrylate polymers and their amounts in paper manufacturing, and thus, when determining or estimating based on the amount of acrylate polymers, the 1160 cm⁻¹ in the IR absorption spectrum is more preferably used. -1 The wavenumber and the amount of absorption peaks at nearby wavenumbers (e.g., height or area, etc.). Furthermore, more preferably, the absorption peaks can be determined based on the 1160 cm⁻¹ wavenumber in the IR absorption spectrum. -1 Wavenumber and the amount of absorption peaks at nearby wavenumbers (e.g., height or area) measure the amount of acrylate polymers.

[0077] The inventors discovered that acrylate polymers exhibit a high IR absorption density at 1160 cm⁻¹. -1 It exhibits characteristic absorption peaks at and near wavenumbers, and at 1160 cm⁻¹. -1 The characteristic absorption peaks at and near wavenumbers are peaks not observed in raw materials used for paper (particularly resin components contained in waste paper raw materials). Therefore, the inventors discovered that at 1160 cm⁻¹... -1 The detection or measurement of characteristic absorption peaks at and near wavenumbers, their amounts, and the results thereof are suitable as indicators for the detection or measurement of acrylate polymers and their amounts. Furthermore, the inventors have discovered a relationship (more preferably a correlation) between the amount of acrylate polymers in the object and the amount of macroadhesive in the object; therefore, they have found that the amount of acrylate polymers in the object is suitable as an indicator of the amount of macroadhesive.

[0078] Furthermore, the inventors discovered that "1160cm" -1 The ratio of "characteristic absorption peak amount at and near wavenumbers" to "total value of absorption peak amount at a specific wavenumber in the IR absorption spectrum" indicates the relationship between the acrylate polymer and other components (especially other resin components), and can therefore also be used as an indicator of an increase or decrease in acrylate content. Therefore, in this embodiment, "1160 cm⁻¹" -1The proportion of the characteristic absorption peak amount at and near wavenumbers in the total absorption peak amount at a specific wavenumber in the IR absorption spectrum can be more preferably used as an indicator of the increase or decrease of acrylate. 1160cm -1 The "nearby" is preferably ±30cm. -1 More preferably ±20cm -1 Even more preferably, ±10cm -1 Furthermore, it is even more preferable to be ±5cm -1 .

[0079] 1160cm -1 The proportion of the "characteristic absorption peak amount at and near wavenumbers" in the "total value of absorption peak amount at a specific wavenumber in the IR absorption spectrum" can be considered, in other words, [1160cm] -1 The total value is defined as the sum of the characteristic absorption peak amounts at wavenumbers and nearby wavenumbers, divided by the absorption peak amounts at a specific wavenumber in the IR absorption spectrum. This ratio can be considered as the "area ratio or height ratio of the absorption peaks at a specific wavenumber in the IR absorption spectrum." Furthermore, the total value can be multiple totals including characteristic absorption peak amounts or multiple totals excluding characteristic absorption peak amounts. Additionally, "total value" can be considered as "total amount."

[0080] In this technique, "peak quantity" can be peak height and / or peak area, etc., and can be the absolute value of the data value obtained in the calculation, but it is essentially the difference between the base value and the base value obtained by using automatic calculation software embedded in the measuring device, etc. (e.g., the absolute value of the obtained data value - the base value), which is common and desirable.

[0081] In this technique, the number of "peaks" can be either singular or plural. Furthermore, peak-related data such as peak shape, peak height, peak amount, peak area, peak quantity, peak selection, peak intensity, and relative peak intensity can be obtained using automated measurement software provided in general-purpose IR measuring instruments. The fact that the amount of large adhesives can be estimated using automated calculation software provided in general-purpose IR measuring instruments is also an advantage of this technique. In IR analysis, relative enhancements and weaknesses, such as relative intensity, are typically shown.

[0082] In this technique, the number of peaks selected from the "absorption peaks at a specific wavenumber" can be either singular or plural. In this technique, the term "specific" regarding the "absorption peak amount at a specific wavenumber" is not particularly limited, and can include all detectable absorption peaks, any number of absorption peaks selected in descending order, or a single or multiple absorption peaks assuming the target substance and whose absorption peak amount is not necessarily large, but is not particularly limited thereto. It can also be a case where the wavenumber is substantially determined or otherwise determined. This "specificity" can be selected using automated measurement software provided in an IR measuring instrument.

[0083] Specific wavenumber (cm) -1 Examples of types include one or more of the following: 670, 700, 720, 800, 880, 1000 to 1050, 1240, 1260, 1380, 1400 to 1450, 1470, 1700 to 1740, 2800 to 3000, etc., but specific wavenumbers are not limited to these.

[0084] Preferably, it can be based on 1160 cm⁻¹ in the IR spectrum. -1 The amount of acrylate polymers can be detected or measured by the relative intensity of the maximum absorption peak at and near the wavenumber. This allows for the determination of the amount of acrylate polymers based on the IR spectrum at 1160 cm⁻¹. -1 The increase or decrease in the amount of acrylate is confirmed by the relative intensity of the absorption peak at the wavenumber and the wavenumber of nearby wavenumbers.

[0085] As a more preferred aspect, it is preferable that the [(a) excluding 1160 cm⁻¹ in the IR spectrum] can be used relative to [(a) ]. -1 The absorption peak amount of any one of the single or multiple absorption peaks shown outside the maximum absorption peak shown at the wavenumber and nearby wavenumber, or (b) the total value of multiple absorption peak amounts selected from the single or multiple absorption peaks shown in the measurement wavenumber region other than the maximum absorption peak] [in the IR spectrum at 1160 cm⁻¹]. -1 The amount of acrylate polymers is detected or measured by the maximum absorption peak at and near the wavenumber. [At 1160 cm⁻¹ in the IR spectrum] -1 The maximum absorption peak intensity shown at the wavenumber and nearby wavenumbers is usually the numerator of a fraction, but the denominator and numerator can be switched to their reciprocals. Additionally, the total value in (b) can include or exclude the 1160 cm⁻¹ peak in the IR spectrum. -1 The maximum absorption peak amount shown at the wavenumber and nearby wavenumbers. Additionally, "relative to" in "relative to the total amount of absorption peaks at a specific wavenumber in the IR absorption spectrum" can be "ratio," and in the case of "ratio," the value can be a percentage (%), where "total amount of absorption peaks at a specific wavenumber in the IR absorption spectrum" is set to 100%. Furthermore, as... Figure 1 As shown in the IR absorption spectrum, the "measurement wavenumber region" can be the normal measurement wavenumber region in the IR spectrum (e.g., 600 to 4000 cm⁻¹). -1 However, it is also possible to achieve this by appropriately selecting the wavenumber (cm). -1 The upper and lower limits of the value can be used to set any measurement wavenumber range.

[0086] Specific examples of preferred aspects include: (Mode 1) Selecting a specific wavenumber and calculating the intensity of the absorption peak at that wavenumber relative to 1160 cm⁻¹. -1 The relative intensity of the absorption peaks at and near wavenumbers; (Mode 2) Select multiple specific wavenumbers and calculate the sum of the intensities of the absorption peaks at each wavenumber and 1160 cm⁻¹. -1 The relative intensity of the absorption peak at and near wavenumbers; (Mode 3) Select multiple specific wavenumbers and calculate the relative intensity of the absorption peak at each wavenumber to the intensity of the absorption peak at approximately 1160 cm⁻¹. -1 The relative intensity of the absorption peaks at nearby wavenumbers, and the average value extracted from the total values ​​of a plurality of selected specific wavenumbers; etc. One or more, two or more, or three of these may be selected, but preferred aspects of the present technique are not limited thereto.

[0087] 1160cm -1 The intensity of the absorption peak at and near wavenumbers can be either the numerator or denominator of a fraction, but is preferably the numerator, and [the intensity of the absorption peak at 1160 cm⁻¹ in the IR spectrum]. -1 The amount of maximum absorption peak shown at the wavenumber and nearby wavenumbers is more desirable.

[0088] A more preferred “1160cm” -1 The characteristic absorption peak at and near wavenumbers is preferably between 1150 and 1170 cm⁻¹ in the IR spectrum. -1 The amount of one or more absorption peaks with high height or wide area in the wavenumber range, and more preferably the maximum absorption peak amount.

[0089] More preferably, the "total value of absorption peaks at a specific wavenumber in the IR absorption spectrum" preferably includes at least "the values ​​of absorption peaks at 600 to 4000 cm⁻¹ in the IR spectrum". -1 (Preferred size: 600 to 3000 cm) -1 The range of wavenumbers in the IR spectrum, and more specifically, preferably "600 to 4000 cm⁻¹". -1 (Preferred size: 600 to 3000 cm) -1 The absorbance is the amount of the absorption peak at a specific wavenumber within a specific wavenumber range. The absorbance along the vertical axis of the IR absorption spectrum is proportional to the concentration or thickness of the substance, so quantitative analysis is preferably performed based on the peak height or peak area.

[0090] Preferably, it can be based on [1150 to 1170 cm⁻¹ in the IR spectrum]. -1 [Maximum characteristic absorption peak intensity in the wavenumber range] and [600 to 4000 cm⁻¹ in the IR spectrum] -1 (Preferred size: 600 to 3000 cm) -1 The amount of a more preferred "acrylate polymer" can be detected or measured by the ratio of the total number of absorption peaks at a specific wavenumber. Additionally, it is preferable that the amount can be determined based on the ratio of the total number of absorption peaks at a specific wavenumber in the IR spectrum. -1 [The maximum absorption peaks shown at wavenumbers and nearby wavenumbers] and [the 600 to 4000 cm⁻¹ in the IR spectrum] -1 The proportion of the total number of absorption peaks at a specific wavenumber is used to detect or measure the more preferred "amount of acrylate polymer". In this embodiment, "total number of absorption peaks" or "high characteristic absorption peak amount" refers to the height of one or more absorption peaks within a predetermined range, or the area or region calculated when each absorption peak is considered as a vertex. In the case of "high characteristic absorption peak amount", the basis for area calculation is not specifically limited to 1150 cm⁻¹. -1 Up to 1170cm -1 The following range.

[0091] Additionally, in this embodiment, the IR spectrum from 1150 to 1170 cm⁻¹ can be selected. -1 The characteristic peak of acrylate polymers is selected and obtained by measuring the maximum absorption peak at a wavenumber. Furthermore, it is preferable that the "maximum characteristic absorption peak" is selected at 1160 cm⁻¹. -1 The maximum absorption peak intensity within the range of nearby wavenumbers is because it makes it easier to identify the "characteristic absorption peak"; however, in cases where the "characteristic absorption peak" is identified more accurately, it can be determined by, for example, using... Figure 1 The acrylate polymers of the standard products in the range of 1150 to 1170 cm⁻¹ -1 The maximum characteristic absorption peak amount can be determined by comparing characteristic peaks at wavenumber, or by using peaks that are increased by the internal standard addition of a standard product of an acrylate polymer.

[0092] At this point, automated calculation software (e.g., area occupancy calculation software) embedded in the IR spectral apparatus can typically be used to obtain information about the ratio, total value, height, or area of ​​the IR spectrum, as well as its proportion. Furthermore, Fourier transform and transmission measurement methods are preferred as conditions for IR spectroscopy.

[0093] Alternatively, a general peak quantization method can be used. For example, to display absorbance in the spectrum, the base point is placed outside both ends of the peak, and the amount can be determined by the height or area between the baseline and the spectrum. In this case, it is desirable to reduce the influence from adjacent peaks. For example, a general method used in chromatographic data processing devices, etc., can also be referenced, specifically, the area percentage method (ratio of each peak = [peak area / total peak area] × 100 (%)) or the corrected area percentage method, etc.

[0094] For example, a calibration curve is created using standard products of acrylate polymers. This calibration curve data is pre-stored in a storage unit or similar entity and retrieved by a control unit as needed. This calibration curve data is then used in the control unit to quantitatively calculate the amount of acrylate polymers in the object (e.g., the height or content ratio). The quantitative calculation results of the acrylate polymers in the object can also be used to calculate the amount of acrylate polymers or the content ratio of acrylate polymers in the object. This allows for a more accurate determination of the amount of acrylate polymers in the object, the content ratio of acrylate polymers, or their increase or decrease.

[0095] In this embodiment, it is possible to identify and utilize, such as Figure 7 and Figure 8 The regression analysis shown (preferably a simple regression equation or least squares method, etc.) illustrates the relationship between the acrylate content ratio (%) and the IR absorption spectrum, as well as the correlation between the absorption peak area ratio at a specific wavenumber in the IR absorption spectrum and the acrylate content ratio (%). Furthermore, since the main component of the macroadhesive is an acrylate polymer, the "amount of acrylate polymer (content ratio (%))" in the object can be obtained based on the "absorption peak area ratio at a specific wavenumber in the IR absorption spectrum" obtained from the object. Additionally, the "amount of macroadhesive" in the object can be calculated, estimated, predicted, or quantified based on the "amount of acrylate polymer" in the object. Moreover, for example, the relationship between the "amount of macroadhesive in the raw material slurry" and the "resin spots" can also be determined based on the "amount of macroadhesive," such as... Figure 8 As shown. Amount of large adhesive material (mm) 2 ( / kg) can be obtained from JIS P 8231:2005.

[0096] The "object" in [amount of acrylate polymer in the object] preferably refers to the object being "measured" and may be the same as or different from the "object" in [amount of large adhesive in the object]. The object may be a managed object, such as a quality control object or a cleaning management object.

[0097] In this embodiment, the amount of acrylate polymer in the object can be used as an explanatory variable to estimate the amount of macroadhesive in the object, which is the response variable. As a more preferred aspect of the embodiment, the ratio of absorption peak area at a specific wavenumber in the IR absorption spectrum can be used as an explanatory variable to estimate the amount of macroadhesive in the object, which is the response variable. The relationship between these two variables can be represented by a linear equation Y = aX + b (a: slope, b: y-intercept, for example, the range of x can be set (c ≤ x ≤ d, etc.)). In some cases, the numerical equation is not explicitly limited, and a more suitable numerical equation can be obtained by acquiring data based on factors such as the size of the facility, the type of waste paper raw material, the site, the site conditions of the object, or the season. Furthermore, the amount of macroadhesive in the object can be estimated by replacing the ratio of absorption peak area at a specific wavenumber in the IR absorption spectrum with different explanatory variables related to the amount of acrylate polymer. Known analytical methods or analytical techniques can be used to obtain the different explanatory variables related to the amount of acrylate polymer. Furthermore, as... Figure 8 As shown, when setting factors related to the amount of large adhesives in the object (e.g., the number of resin spots (spots / day)), the amount of the setting factor (resin problem or resin countermeasure, etc.) or its increase or decrease can also be predicted or estimated based on the amount of acrylate polymer obtained by analyzing the IR absorption spectrum. Preferably, one or more factors selected from resin problems and resin countermeasures are chosen as the setting factor. This makes it more advantageous to predict and set resin problems or resin countermeasures, and to optimize the content of resin countermeasures, etc.

[0098] 3. The method for manufacturing paper based on the estimation of the amount of large adhesive material according to this embodiment.

[0099] In the description of the method for manufacturing paper based on the estimation of the amount of large adhesive material according to this embodiment, the objects that are repeated with "1." and "2.", the amount of acrylate polymer, the estimation of the amount of large adhesive material, the various formulations or treatment methods of the resin, etc., will not be described again as appropriate, and the descriptions in "1." and "2." are also as in this embodiment, and can be appropriately adopted. In addition, the description of the example method for manufacturing paper based on the estimation of the amount of resin (preferably, the amount of large adhesive material) in this embodiment can also be as in this embodiment, and can be appropriately used.

[0100] Additionally, in this embodiment, for example, a "verb" (such as "adjust") can be replaced by "process" or "step," a "step" can be replaced by a "verb" or "process," and a "process" can be replaced by a "verb" or "step." Furthermore, in this embodiment, "process," "means," or "mechanism" can be replaced by a system, device, component, or method, and vice versa, and "device" can be replaced by a system, means, mechanism, or component, and vice versa. Additionally, "component" can be replaced by a component or device used to include a mechanism, device, means, or system, and vice versa. Furthermore, in this embodiment, the order of processing may not be specific, and the order of processing can be rearranged.

[0101] This embodiment provides a method for manufacturing paper, wherein the level of resin countermeasures derived from large adhesives in paper manufacturing is controlled based on an increase or decrease in the amount of acrylate polymers contained in the controlled object during paper manufacturing. Alternatively, this embodiment can be a method for controlling the level of resin countermeasures derived from large adhesives in paper manufacturing. "Control" of the level of resin countermeasures derived from large adhesives can be "adjustment," and the resin countermeasures derived from large adhesives can be large adhesive countermeasures.

[0102] Preferably, the amount of resin derived from the main adhesive in paper manufacturing is estimated based on the amount of acrylate polymer in the material, and the level of resin countermeasures derived from the main adhesive in paper manufacturing can be more appropriately controlled by estimating the amount of resin derived from the main adhesive. In this embodiment, the amount of resin derived from the main adhesive can be used for main adhesive countermeasures.

[0103] In this embodiment, the objects used can originate from the same or different sites, and can be a single object or multiple objects. When multiple different sites exist, object disposal priorities can be set based on the amount of acrylate polymer or based on the amount of acrylate polymer and the level of resin countermeasure data originating from large adhesives. For example, if objects originating from multiple different sites are identified, the priority of resin countermeasures originating from large adhesives at each site can be determined based on the order of the amount of acrylate polymer in the object, or the priority of the sites can be determined based on the decreasing risk order determined by the level of acrylate polymer in the resin countermeasure data of each site, and resin countermeasures originating from large adhesives on the objects can be performed based on the priority.

[0104] This embodiment provides a method for manufacturing paper, including:

[0105] The process of estimating the amount of resin derived from large adhesives in paper manufacturing based on the amount of acrylate polymers contained in the controlled objects in paper manufacturing, and

[0106] Treatment to control the level of resin countermeasures derived from large adhesives in paper manufacturing based on an increase or decrease in the estimated amount of resin derived from large adhesives; or a method for controlling the level of resin countermeasures derived from large adhesives in paper manufacturing.

[0107] Furthermore, this embodiment can be a method for counteracting large adhesives, or a method for controlling or adjusting the level of large adhesive countermeasures in paper manufacturing, a method for reducing, removing, decreasing or suppressing large adhesives or acrylate polymers in paper manufacturing, or a method for cleaning large adhesives or acrylate polymers in paper manufacturing.

[0108] In this embodiment, the "level" in "controlling the large adhesive material countermeasures in paper manufacturing to reach a certain level" can be a level derived from a general resin countermeasure for the large adhesive material, or it can be a level obtained statistically from a resin countermeasure for the large adhesive material. The "level" can be a standard level, etc., and the "level" in the level of the resin countermeasure for the large adhesive material can be a "level value," and in this case, examples include "a predetermined value or higher," and "within the desired value range," etc. Furthermore, the level or level value can be appropriately set by the operator, or it can be determined and selected from preset levels or level values ​​by a control unit, etc.

[0109] Furthermore, since the level of problems caused by obstacles originating from large adhesives varies depending on the site, it is preferable to appropriately set up countermeasures or levels for large adhesives for each site.

[0110] In addition, in this embodiment, the “site” for taking measures against large adhesives is more preferably a site where an object (preferably a managed object) exists and / or a site related to the object. There are no particular limitations on the site as long as it is used for paper manufacturing, and examples of such sites include one or more selected from paper manufacturing, the processes and facilities involved (e.g., apparatus, tools, mechanisms or areas, etc.).

[0111] Additionally, in this embodiment, the single or multiple resin countermeasures and their levels corresponding to each object to be identified (e.g., such as...) Figure 7 and Figure 8The relationship diagrams or tables shown, multivariate analysis results or numerical equations obtained from them, level setting conditions or judgment methods, etc., can be pre-stored in storage components, or can be appropriately input and set by the user or operator from the input unit. Furthermore, the control unit, which has already acquired object data and data on the amount of acrylate polymers in the object obtained through object verification, can access the storage components, etc., and can select and obtain suitable resin countermeasure data from groups (groups, classifications, or categories, etc.) including various resin countermeasures from large adhesives based on object data (site name, object type or classification, category, or label, etc.). The resin countermeasure data from large adhesives can include one or more of the following: site name, type, classification, category, label, relationship with the object, etc., making it possible to search for groups from the object data. This resin countermeasure data from large adhesives preferably includes one or more various data, such as level data and implementation content data for achieving the appropriate resin countermeasure from the large adhesive corresponding to the object.

[0112] In this embodiment, various data are preferably categorized into files using tags and / or strings such as names or categories, and the files can be saved and managed independently, either by being properly hierarchical and stored in folders, or by being maintained and managed in storage components, servers, or the cloud.

[0113] A more preferred aspect of this embodiment includes: acquiring data on the amount of acrylate polymers in the object; selecting and acquiring resin countermeasure data derived from the large adhesive based on the object data and / or the data on the amount of acrylate polymers in the object; adapting the data on the amount of acrylate polymers in the object to the resin countermeasures derived from the large adhesive, thereby determining, selecting, or judging appropriate countermeasures (level, implementation content of the level, etc.) based on the countermeasure data; implementing the determined appropriate countermeasures for the site where the object exists and / or the site related to the object; and controlling the level of the large adhesive countermeasure through the above operations. Feedback control can be implemented as the control or adjustment of the level.

[0114] Furthermore, in this embodiment, the level can be set using the allowable range of the amount of large adhesive and / or the amount of acrylate polymer. The level can be set for individual sites such as processes and facilities, and this can be pre-stored in a storage unit. This allows for appropriate control of the large adhesive level in various sites of paper manufacturing. As level data, one or more level data from various sites such as processes and facilities can be selected. More specifically, the data on the amount of acrylate polymer in the object identified for the site is adapted to resin countermeasure data originating from that site or related large adhesive. Thus, an appropriate resin countermeasure originating from the large adhesive is determined based on the resin countermeasure originating from the large adhesive, and the resin countermeasure originating from the large adhesive is implemented in the site, thereby controlling the level of the large adhesive countermeasure. For example, if the amount of acrylate polymer in the object is higher (worse) than the level at the site where the object exists or at a site (process and facility) related to the object, the use of chemicals such as cleaning agents can be increased (e.g., in terms of quantity or concentration); if the amount of acrylate polymer is lower (more favorable) than the level at the site, the use of chemicals can be reduced; if the amount of acrylate polymer is within the level range at the site, the use of chemicals can be maintained. The amount of acrylate polymer can also be kept within a certain range through feedback control. This level can be a level value.

[0115] Additionally, in this embodiment, the levels can be appropriately set to include multiple stages (such as three or five stages) or multiple types (such as two or three types) or to include the implementation of different countermeasures. For example, it can be configured to set level A (process water a, device a, device b, device c: strong countermeasure level); level B (device a, process water b, device c: intermediate countermeasure level); and level C (process water b, weak countermeasure level) as resin countermeasures originating from large adhesives, and to enable the selection of one or more of these levels A to C of resin countermeasures originating from large adhesives based on the identified object data (e.g., site name), and can also be configured to implement the selected level of resin countermeasures originating from large adhesives based on data of the amount of acrylate polymers in the identified object, so as to control the amount of large adhesives in the object.

[0116] In this embodiment, examples of "adjustment level" in "adjusting the level of countermeasures against large adhesives" include: replacing raw materials with high adhesive content by purging raw materials; adjusting the amount of foreign matter rejected in the raw material preparation process or papermaking process, or the amount of rejected foreign matter recovered in foreign matter removal devices (such as screens or cleaners); adjusting the operating intensity of facilities that can refine large adhesives (such as kneaders or fine grinders); adjusting the water pressure or volume of tool cleaning spray water, adjusting the exchange frequency of repairs to scrape off adhering substances from tools, and adjusting the frequency of routine cleaning; adjusting the amount of internally added chemicals (such as anti-adhesion agents that reduce the pressure-sensitive adhesiveness of the large adhesive surface); adjusting the amount of externally added chemicals that have the function of dissolving, cleaning, or preventing the adhesion of large adhesives; and so on, and one or more of these may be selected.

[0117] Regarding measures for large adhesive particles, since large adhesive particles differ from other resins in size and physical properties, the same measures as those for other resin components are generally not suitable. For example, measures for large adhesive particles that mechanically separate or remove them are suitable for equipment and devices that selectively capture large foreign objects using screens or cleaners. Measures for miniaturizing large adhesive particles, such as those using kneaders or fine grinders, have limited effectiveness due to pressure-sensitive adhesion and elasticity, but are still effective to a certain extent. In measures for large adhesive particles involving chemicals, fixatives and dispersants effective for fine resins are not expected to be effective for large adhesive particles, but anti-sticking agents that reduce pressure-sensitive adhesion at the particle surface are expected to have a certain level of effectiveness as a measure for large adhesive particles. Furthermore, oxygen cannot react within the particles of large adhesive particles; however, in cases where pressure-sensitive adhesion may decrease due to oxygen reaction, oxygen is also expected to have a certain level of effectiveness as a measure for large adhesive particles, similar to anti-sticking agents. It is anticipated that coating the facility with resin and externally added cleaning agents in the same manner as for fine resins will be effective as a countermeasure against large adhesives. This embodiment also allows for more appropriate control over the level of large adhesive countermeasures.

[0118] Furthermore, this embodiment achieves an efficient countermeasure against large adhesives, and thus also allows the level of the countermeasure to be controlled by combining information on the degree of obstruction (such as the number of spots or the number of paper tears) or the degree of contamination (such as the suction pressure of the felt) with the increase or decrease of the amount of acrylate polymer.

[0119] This embodiment allows for more appropriate control of the level of large adhesive reaction than conventional large adhesive reaction methods.

[0120] In this embodiment, there are no particular limitations on resin countermeasures or management controls originating from large adhesives in paper manufacturing and the processes and facilities involved (e.g., processes, apparatus, mechanisms, or facilities). Examples include removing foreign matter with a screen or cleaner; miniaturizing foreign matter with a kneader or refiner; cleaning paper machines or their tools (such as wires or felts) through facilities or spray heads; using cleaning agents for acrylate polymers, such as cleaning agents and contaminant preventers effective for acrylate polymers in facilities such as wires, felts, pressure rolls, dryer rollers, and dry wires; using internally added resin control agents effective for large adhesives; and so on, and one or more of these may be selected. In this embodiment, by combining techniques for confirming (detecting or measuring, etc.) the amount of acrylate polymers in the object, large adhesive countermeasures or management controls in paper manufacturing and the processes and facilities involved can be implemented more simply and appropriately.

[0121] Examples of more preferred countermeasures for adjusting or controlling the level of large adhesive residue countermeasures in this technology include: controlling the increase or decrease of the amount of repulsion when removing foreign matter with a screen or cleaner; controlling the increase or decrease of the miniaturization load (e.g., electrical energy) when miniaturizing foreign matter with a kneader or fine mill; controlling the increase or decrease of the spray water volume and spray pressure when cleaning a paper machine or its tools (such as forming wire or felt) through a spray head; controlling the increase or decrease of cleaning agents and antifouling agents effective against acrylate polymers for various processes (equipment or parts, tools, etc.) when using chemicals; controlling the increase or decrease of internally added resin control agents effective against large adhesive residues; and so on.

[0122] As a countermeasure against resins originating from large adhesives, it is preferable to implement one or more of the following: a mechanism for removing foreign matter from process water, a mechanism for miniaturizing foreign matter in process water, a mechanism for cleaning the process, and a mechanism for adding chemicals to process water. Among the more advantageous countermeasures against resins originating from large adhesives, it is desirable to select each mechanism considering a balance with disadvantages (such as increased amounts of spilled raw materials, miniaturization of resin other than fibers or large adhesives, deterioration of tools, or increased costs of chemicals, power, or steam, etc.) and countermeasures against these disadvantages.

[0123] Preferably, when the amount of acrylate polymer in the controlled object of paper manufacturing increases, the level of resin countermeasures is increased to promote resin countermeasures, and when the amount decreases, the level of resin countermeasures is decreased to further suppress or maintain resin countermeasures, and large adhesive countermeasures are more preferred.

[0124] Preferably, the increase or decrease of the amount of acrylate polymer contained in the controlled object in paper manufacturing is measured over time and continuously, and feedback control is performed to ensure that the resin countermeasures reach a certain level.

[0125] Example 1, which is one example of this embodiment, has been shown, but this embodiment is not limited thereto. In Example 1, when asked "Is the acrylate content ratio a predetermined amount or more?", the system determines "yes" or "no", and the process proceeds to the next step. However, the process can proceed to the next step with a different determination than this determination.

[0126] As step 101, if the amount of acrylate polymer in the object is equal to or higher than the level (predetermined value) of the selected resin countermeasure originating from the large adhesive, the control unit strengthens the resin countermeasure originating from the large adhesive; or if the amount of acrylate polymer is equal to or lower than the level (predetermined value), the control unit maintains (yes) or weakens (no) the resin countermeasure originating from the large adhesive. Here, "strong (more)" and "weak (less)" refer to relative relationships, and for example, a particular countermeasure (e.g., the amount of chemicals used) is stronger (more) or weaker (less) than another countermeasure (e.g., the amount of chemicals used). "Specific" in "specific countermeasure" can refer to before or after a certain time (e.g., the later countermeasure is stronger (more) or weaker (less) than the earlier countermeasure). Additionally, feedback control can be used to control the resin countermeasure originating from the large adhesive to reach a certain level (within a predetermined range).

[0127] Furthermore, the real-time response, automatic control response, and enhanced treatment response in this embodiment will each be described in detail below using examples, but this embodiment is not limited thereto. As a preferred aspect, (1) when the monitored acrylate content or the amount of converted large adhesive is within the range where large adhesive countermeasures can be achieved during paper manufacturing, a real-time response or automatic control response is preferred. On the other hand, (2) when the monitored acrylate content or the amount of converted large adhesive exceeds the level where large adhesive countermeasures can be achieved during paper manufacturing, paper manufacturing is preferably suspended and an enhanced treatment response is initiated. These can be implemented by a control unit.

[0128] There are no particular limitations to real-time response, and examples include responses such as continuously measuring the amount of acrylate on the surface of the pressure roller, and doubling the amount of felt cleaner added once the converted acrylate content reaches 10% or more.

[0129] There are no particular limitations on the response of the automatic control, and examples include responses such as continuously measuring the amount of acrylate on the surface of the pressure roller and increasing or decreasing the amount of felt cleaner added in proportion to the ratio of the converted acrylate content.

[0130] There are no particular limitations on the response to enhanced treatment, and examples include responses such as those where the amount of large adhesive material converted from the final rejected slurry using a sieve or cleaning agent in a continuously measured raw material preparation process has reached 500,000 mm. 2 In cases where the volume of pulp is 1 kg or more, manufacturing is suspended, the total volume of pulp in the process is purged to allow for placement, and the paper machine and tools in the raw material preparation process are cleaned.

[0131] 3-1. Paper Manufacturing

[0132] There are no particular limitations on the papermaking process using the method of this embodiment, and the method of this embodiment can be applied to well-known papermaking processes or papermaking processes that can be designed in the future. Preferably, the papermaking process includes a preparation process, a papermaking process, and a water recycling process. Figure 1 An example is shown, but the process of this embodiment is not limited to this. Furthermore, in this embodiment, the control unit can instruct various implementations of the individual parts, which allows for more appropriate resin strategies and more suitable paper manufacturing derived from large adhesives.

[0133] Reference Figure 9 The paper manufacturing process described in this embodiment is not limited thereto.

[0134] In this embodiment, paper manufacturing (papermaking process) preferably includes preparation process 2, papermaking process 10, and a water recycling process for recovering water generated from each process (e.g., refer to...). Figure 9 ).

[0135] Examples of objects used in this embodiment include one or more of the following: process water in a papermaking process, pulp-containing substances (pulp water, pulp sheets, or final paper products), substances adhering to the apparatus, tools in the process, etc. When an object exists in a process or apparatus, it is preferable to select resin countermeasure data derived from a large adhesive for that process or apparatus, and to implement a resin countermeasure derived from the large adhesive based on that countermeasure data. An object with the largest amount of acrylate polymer can be selected from multiple objects, and a resin countermeasure derived from the large adhesive can be implemented for that object.

[0136] In this embodiment, the process includes confirming (detecting or measuring, etc.) the amount of acrylate polymer in the object; estimating, calculating, predicting or quantifying the amount of macroadhesive based on the amount of acrylate polymer; selecting a macroadhesive countermeasure suitable for the object based on the object and the amount of acrylate polymer; and adapting the amount of macroadhesive in the object to a level suitable for the resin countermeasure derived from the macroadhesive of the object and controlling the resin countermeasure derived from the macroadhesive to reach that level.

[0137] This allows for more appropriate implementation of resin countermeasures originating from large adhesives. In the following, as an example of a resin countermeasure originating from large adhesives, a resin cleaning countermeasure will be described; however, as described above, such a resin countermeasure for large adhesives, for example, a resin countermeasure for large adhesives originating from miniaturized foreign matter, involves controlling the load (electrical energy) when miniaturizing the foreign matter. Various resin countermeasures originating from large adhesives can be appropriately implemented in this embodiment, and this embodiment is not limited to this.

[0138] Preferably, the preparation process 2 includes one or more of a process selected from dissolution, disintegration, dust removal (cleaning or screening), concentration, and stirring, and these processes are arranged in the order listed above. In preparation process 2, raw material 1, such as waste paper, can be made into papermaking raw material by dissolution process 21 through stirring process.

[0139] The papermaking process preferably includes at least an inlet 12, a paper layer forming process (wire component) 13, a wet paper dewatering process (press component) 15, and a wet paper drying process (drying component) 16, and these processes are more preferably arranged in the order listed above. The inlet is configured to uniformly supply uniformly dispersed pulp raw materials (e.g., pulp concentration of about 0.5% to 1%) onto the wire by spraying or the like. In addition, the papermaking process may include a dust removal process (screening process) 11, which is configured to remove impurities, etc., from the pulp raw materials before the inlet 12. Furthermore, the papermaking process may include a calender component, a roll, a cutter, or a winding machine, etc., after the drying component. The papermaking raw materials can be finally made into paper 5 by performing the papermaking process. The papermaking process 10 (separate processes 12 to 16) is connected to the water recycling treatment of primary circulating water 19 and / or secondary circulating water 20, wherein water generated during papermaking (such as filtered water (e.g., resin and pulp-containing water, etc.)) is recycled as white water or recycled water 19.

[0140] In the water recycling process, the water used in the papermaking process 10 is recycled to, for example, storage tanks or storage devices (such as white water silos 18). The recycled and reusable water is circulated to the preparation process 2 and / or the papermaking process 10 (e.g., dust removal process 11), and water that becomes unnecessary can be discharged externally as wastewater.

[0141] For example, in resin cleaning measures originating from large adhesives, cleaning agents for large adhesives can be used at sites or places where resin contamination has occurred or where there is a risk of resin contamination.

[0142] Cleaning agents can be applied to any treatment, site, apparatus, and tools in the papermaking process. For example, it is preferred to add the cleaning agent to papermaking tools such as wires, felts, dry wires, rolls, or suction rolls, and it is also preferred to add the cleaning agent to one or more of a variety of tools, boxes, apparatuses, and pipes during the papermaking process, and / or to spray heads for cleaning and / or for preventing contamination during the papermaking process.

[0143] Regarding cleaning measures for resin contamination originating from large adhesives, there are no particular restrictions on the location of cleaning agent addition in paper manufacturing processes. Cleaning agents can be added or injected into locations where resin contamination from large adhesives adheres during paper manufacturing. They can be added or directly injected into tanks or pipes installed near these locations, and examples of tanks include those used for cleaning or sealing. Alternatively, devices or mechanisms for spraying, coating, injecting, impregnating, or cleaning can be used to bring the cleaning agent into contact with the resin contamination from large adhesives.

[0144] Furthermore, as a solution for cleaning resins derived from large adhesives, cleaning agents are preferably applied to papermaking processes (preferably papermaking machines or papermaking tools) where contamination becomes more severe.

[0145] The cleaning agent is preferably used in one or more of the following processes in the papermaking process: paper layer formation process 13, wet paper dewatering process 15, and white water silo (white water storage tank) 18.

[0146] When using resin-based cleaning methods derived from large adhesives in the paper layer forming process 13 and / or wet paper dewatering process 15, for example as shown in 21a, 21b, and 21c, it is preferable to directly or indirectly contact water containing chemicals (such as spray water, cleaning water, or injection water) in which a cleaning agent has been mixed with the water with chemicals (such as a net, felt, or pressure roller at a device or mechanism for spraying, coating, or injection). Chemical-free cleaning water or spray water may also be used, but the use of chemicals is preferred.

[0147] As a solution for cleaning resins originating from large adhesives, adding a cleaning agent to the spray water and using chemically-containing spray water in the papermaking process can clean papermaking tools (such as felt used for papermaking), thus removing resin contamination from large adhesives. Furthermore, using spray water containing a cleaning agent in the papermaking process can prevent the adhesion of resin contamination from large adhesives to the papermaking process materials (such as felt used for papermaking).

[0148] One example of the resin cleaning strategy derived from large adhesives according to this embodiment is a method for cleaning papermaking tools, but the strategy is not limited to this.

[0149] The wet sheet (e.g., 12 to 20% by mass solids concentration) separated from the coil rolls in the press section is placed on the papermaking felt in the press section, sandwiched between two pressure rolls, and squeezed. There are no particular limitations on the papermaking felt; however, needle-type felt made of polyamide, polyester, or wool is commonly used, for example. The moisture content of the wet paper separated from the press section is typically about 60% by mass, and the wet paper, with its reduced moisture content after the press section, is dried in the drying section. The papermaking felt (from which the wet paper has been separated) travels under the pressure rolls while being cleaned during its travel, and the wet sheet is again placed on the papermaking felt.

[0150] In resin cleaning measures, there are no particular limitations on the method of applying spray water containing cleaning agent to papermaking tools, and for example, one or more of the following can be used: full-width spray head, high-pressure moving needle spray head, and low-pressure needle spray head.

[0151] The following describes one aspect of a method for cleaning felt used in papermaking, but this embodiment is not limited thereto, and the method can be used as a method for cleaning resin contamination from large adhesives in felt used in papermaking or as a method for preventing the adhesion of resin contamination from large adhesives. Furthermore, in some or all of the following treatments using spray water, it is preferred that the chemicals of this embodiment are suitably contained in the spray water. The felt used in papermaking is first cleaned with a high-pressure moving needle spray head. In the high-pressure moving needle spray head, spray water can be injected from the inside of the felt used in papermaking at a water pressure of 2,000 kPa to 3,000 kPa as the injection nozzle moves in the width direction of the felt used in papermaking, and contamination adhering to the outside of the felt used in papermaking is eliminated. The spray water that has passed through the felt used in papermaking from the inside to the outside can be suctioned out using a suction box. Preferably, the high-pressure moving needle spray head is provided with an interlocking mechanism between the papermaking felt and the high-pressure moving needle spray head, so that the injection of spray water is stopped when the papermaking felt is paused, and damage to the papermaking felt is prevented.

[0152] Next, using full-width spray heads equipped with fan nozzles, spray water is supplied from the inside across the entire width of the papermaking felt at a water pressure of 200 kPa to 500 kPa. The papermaking felt contains a sufficient amount of spray water, which can be extracted, suctioned out, and removed from foreign matter or clogging components. Furthermore, when a low-pressure moving needle spray head moves from the outside along the width of the papermaking felt and has papermaking gel, spray water can be injected at approximately 800 kPa, scraping away foreign matter adhering to the surface of the papermaking felt. Finally, spray water can be supplied from full-width spray heads located on the inner and outer sides of the papermaking felt, and the spray water can be suctioned out using one or more suction boxes to complete the cleaning of the papermaking felt.

[0153] This makes it more advantageous to clean resin contamination from large adhesives adhering to the felt used for papermaking by injecting a spray of water containing detergent into the felt used for papermaking, and / or more advantageous to prevent the adhesion of resin contamination from large adhesives adhering to the felt used for papermaking by contacting the detergent with the felt used for papermaking.

[0154] 3-2. Other embodiments

[0155] In the large adhesive countermeasure or resin state management control system according to this embodiment, it is preferable to provide an apparatus for controlling the resin countermeasure or resin state management originating from the large adhesive, which includes at least the aforementioned control component. In the large adhesive countermeasure or resin state management control system according to this embodiment, the control component, or the apparatus or other apparatus including the control component and other components for managing and controlling the resin countermeasure or resin state originating from the large adhesive, may also be provided with a communication component capable of wirelessly or wiredly transmitting and receiving signals.

[0156] The method related to this embodiment can also be implemented in an apparatus for executing the method or an apparatus for managing the resin countermeasures or resin state derived from the large adhesive (e.g., computer, PLC, server, cloud service, etc.) using a device or control unit including a CPU, etc. Alternatively, the method related to this embodiment can be stored as a program in hardware resources including recording media (non-volatile memory (USB memory, SSD (solid-state drive) etc.), HDD, CD, DVD, Blu-ray disc, etc.), and the method can be implemented using a control unit. An apparatus including a control unit or system can also be provided, such as a system for managing and controlling the resin countermeasures or resin state derived from the large adhesive, wherein the system controls the resin countermeasures or resin state derived from the large adhesive so that it is managed and controlled by the control unit. In addition to the control unit, the apparatus for executing the method related to this embodiment can be provided with an input unit such as a keyboard, a communication unit such as a network, a display unit such as a monitor, etc.

[0157] An apparatus or system for managing and controlling resin countermeasures or resin states derived from large adhesives may include input components such as a keyboard, communication components such as a network, output components such as a display, storage components such as an HDD, or measurement components. The apparatus or system preferably includes input components, output components, and storage components, and further preferably includes communication components and / or measurement components.

[0158] The input component is capable of receiving user operations from the operator performing the method of this embodiment. The input component may include, for example, a mouse and / or a keyboard. Alternatively, the input component may be configured as an input component that receives touch operations on the display surface of a display device.

[0159] Output components are capable of outputting processing status and related information (e.g., tables, graphs, or descriptions). Examples of output components include display devices that display images, speakers that output sound, and printing devices that print on printing media such as paper, but output components are not limited to these.

[0160] The storage component is capable of storing data input by the operator and datasets used for managing and controlling resin countermeasures or resin states derived from large adhesives. The storage component may include, for example, a storage medium.

[0161] Additionally, programs and hardware can be used to execute a system according to this embodiment for managing and controlling the resin countermeasures or resin state of large adhesives. One embodiment of the computer 100 according to an embodiment of the present invention (not shown) is not limited thereto, but includes at least a CPU as a configuration element of the computer 100. Furthermore, it may include one or two selected from RAM, storage components, output components, input components, communication components, ROM, and measurement components, preferably including RAM, storage components, output components, and input components, and further preferably including at least one of communication components, measurement components, and ROM. Each configuration element is preferably connected to a bus, for example, as a data transmission path.

[0162] This technology can also be configured in the following ways.

[0163] [1] A method for estimating or determining the amount of a large adhesive in paper manufacturing based on the amount of acrylate polymer contained in an object (preferably a managed object) in paper manufacturing.

[0164] [2] According to the method of [1], the managed object is selected from one or more of the following: raw material pulp, dewatered filter cake, process water, substances adhering to the facility, final paper products, process water in the papermaking process, substances adhering to the paper machine, spots in the final paper products and their solvent extracts.

[0165] [3] According to the method of [1], the object is selected from one or more of the following: raw material pulp, dewatered filter cake, process water, substances adhering to the facility, final paper products and solvent extracts thereof. The object preferably originates from one or more of the following: preparation process, papermaking process and water recycling process.

[0166] [4] According to the method of [1] or [3], the object is selected from one or more of the following: process water in a papermaking process, substances adhering to a papermaking machine, spots in the final paper product and solvent extracts thereof.

[0167] [5] The method according to any one of [1] to [4], wherein the amount of the acrylate polymer is measured by IR analysis.

[0168] [6] The method according to any one of [1] to [5], wherein the amount of the acrylate polymer is determined by measuring the 1160 cm⁻¹ IR spectrum. -1 The measurement is based on the relative intensity of the maximum absorption peak at the wavenumber and the wavenumbers nearby.

[0169] [7] The method according to any one of [1] to [6], wherein the method is derived relative to [(a) except for 1160 cm⁻¹ in the IR spectrum. -1 The absorption peak amount of any one of the single or multiple absorption peaks shown other than the maximum absorption peak shown at the wavenumber and nearby wavenumber, or (b) the total value of multiple absorption peak amounts selected from the single or multiple absorption peaks shown in the measurement wavenumber region other than the maximum absorption peak] [in the IR spectrum at 1160 cm⁻¹]. -1 The amount of the acrylate polymer is measured by [the maximum absorption peak amount shown at the wavenumber and nearby wavenumbers]. (b) The total value may include or exclude 1160 cm⁻¹ in the IR spectrum. -1 The sum of the amounts of multiple absorption peaks at the wavenumber and the nearest wavenumber where the maximum absorption peak is shown.

[0170] [8] The method according to any one of [1] to [7], wherein [1160 cm⁻¹ in the IR spectrum] -1 The maximum absorption peak intensity shown at wavenumber and nearby wavenumbers is [in the IR spectrum from 600 to 4000 cm⁻¹]. -1 The amount of the acrylate polymer is measured by the ratio of the total amount of absorption peaks at a specific wavenumber.

[0171] [9] A method for manufacturing paper or a method for controlling the level of a large adhesive countermeasure, wherein the large adhesive countermeasure in paper manufacturing is controlled to reach a certain level based on the increase or decrease of the amount of acrylate polymer contained in the object (preferably the managed object) in paper manufacturing.

[0172]

[10] A method for manufacturing paper or a method for controlling the level of large adhesive countermeasures, wherein the large adhesive countermeasures in paper manufacturing are controlled to reach a certain level based on the amount of large adhesive obtained by the method according to any one of [1] to [8].

[0173]

[11] According to the method of [9] or

[10] , the large adhesive countermeasure is used to implement one or more of the following: a mechanism for removing foreign matter from process water, a mechanism for miniaturizing foreign matter in process water, a mechanism for cleaning the process, and a mechanism for adding chemicals to process water.

[0174]

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

[11] wherein, when the amount of acrylate polymer in the object (preferably the object to be managed) in paper manufacturing increases, the level of the large adhesive countermeasure is increased to promote the large adhesive countermeasure, or when the amount decreases, the level of the large adhesive countermeasure is decreased to suppress the large adhesive countermeasure.

[0175]

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

[12] wherein the amount of acrylate polymer contained in the object (preferably the managed object) in paper manufacturing is increased or decreased over time, and feedback control is performed to achieve a certain level of large adhesive countermeasures.

[0176] Example

[0177] The embodiments of the present invention will be described using the following examples and comparative examples. The scope of the invention is not limited to these examples.

[0178] [Test Example 1]

[0179] IR absorption spectra of acrylates, EVA, latex, and rosin sizing agents, which are common resin components contained in paperboard and waste paper raw materials, were measured. Figures 1 to 4 When comparing the IR absorption spectra of these acrylates, EVA, latex, and rosin sizing agents, only... Figure 1 The acrylate shown is at 1160cm -1 It exhibits an absorption peak near the wavenumber. This makes it possible to achieve an absorption peak at 1160 cm⁻¹. -1 Absorption peaks near the wavenumber are suitable indicators of acrylates.

[0180] <Infrared Analysis Device>

[0181] FTIR-ART device: FT / IR4100 (Fourier transform, area occupancy calculation software: software embedded in the device) manufactured by JASCO.

[0182] Transmission measurement method: Liquid film method: Measurement is performed on a film obtained by drying a solution of benzene / chloroform (1:1) solvent mixture on a KBr plate.

[0183] Measurements can be performed using infrared analysis, in which an object (e.g., a quality control object) is illuminated with infrared light and the intensity of the reflected light is measured.

[0184] [Test Examples 2-1 to 2-3]

[0185] As a test example 2, solvent extracts of raw material pulp from the cardboard manufacturing machine (sample 2-1), solvent extracts of filtrate from the raw material pulp from the cardboard manufacturing machine (sample 2-2), and large adhesive residues collected from the raw material pulp from the cardboard manufacturing machine (sample 2-3) were used.

[0186] Properties of Raw Material Pulp in Cardboard Manufacturing Machines

[0187] The raw material slurry used in this test example is a slurry obtained by collecting the finished raw materials before adding the internally added chemicals as a sample.

[0188] The raw material slurry has the following properties: SS concentration of 3.7%, pH of 7.1, and conductivity of 238 mS / m.

[0189] The same pulp was used as the raw material pulp in the cardboard manufacturing machines used in Samples 2-1, 2-2 and 2-3.

[0190] <Method for producing solvent extracts of raw material slurries>

[0191] 50 mL of a solvent mixture of benzene and chloroform (1 vol: 1 vol) (extraction temperature: 20°C to 25°C) was mixed with 1 g of raw material slurry dried at 105°C for 3 hours in a cardboard manufacturing machine and extracted under static conditions for 60 minutes. The extracted liquid was slightly dispersed and the supernatant was used as a sample.

[0192] <Method for solvent extraction of filtrate used to produce raw material slurry>

[0193] A solvent mixture of 5 mL benzene and chloroform (1 vol: 1 vol) was mixed with the evaporated and dried material obtained by drying the filtrate (100 mL) at 105 °C for 24 hours, and extracted under the condition of standing for 60 minutes. The extracted liquid was slightly dispersed, and the supernatant was used as a sample. The filtrate was obtained by filtering the raw material pulp in the cardboard manufacturing machine with No. 41 filter paper with a pore size of 20 μm manufactured by Watt Mann Ltd. at a sample volume of 0.5 mL per square meter of paper.

[0194] <Method for collecting large adhesive substances from raw material slurry>

[0195] 2 mL of a solvent mixture of benzene and chloroform (1 vol: 1 vol) was mixed with 0.1 g of the substance obtained by the following method and extracted under static conditions for 60 minutes. The extracted liquid was slightly dispersed, and the supernatant was used as a sample. The substance was obtained by sorting the pressure-sensitive adhesive material from the raw material pulp (10 L) collected from a cardboard manufacturing machine using a slit screen with a 150 μm opening, according to the method of JIS P8231:2005, and drying the material at 105 °C for three hours.

[0196] In test example 2-1, the IR absorption spectrum of the solvent extract of the raw material pulp in the cardboard manufacturing machine at 1160 cm⁻¹ -1 Absorption peaks are rarely observed near the wavenumber. Figure 5 Test Example 2-1 shows that the amount of acrylate in the raw material pulp in the cardboard manufacturing machine is extremely small.

[0197] Additionally, in Test Example 2-2, the IR absorption spectrum of the solvent extract of the filtrate obtained by filtering raw material pulp in a cardboard manufacturing machine using No. 41 filter paper with a pore size of 20 μm manufactured by Watt Mann Ltd. was measured at 1160 cm⁻¹. -1 No absorption peaks were observed near the wavenumber (not shown). Test Example 2-2 indicates that the amount of acrylate present as a fine resin dispersed in the papermaking process water is small. Furthermore, Test Example 2-2 reflects the property of acrylate to be elastic even at room temperature and therefore not easily fragmented.

[0198] On the other hand, in test examples 2-3, for large adhesives in the raw material pulp of the cardboard manufacturing machine, at 1160cm... -1 A strong absorption peak is observed near the wavenumber, and acrylate is the major component. Figure 6 Test examples 2-3 show that the large adhesives, which are disintegrating substances of hydrophobic pressure-sensitive adhesives, are the main source of supply for acrylate resins.

[0199] [Test Example 3]

[0200] In Test Example 3, a mixture was obtained by mixing a solvent extract of the raw material pulp from the cardboard manufacturing machine used in Test Example 2-1 with acrylate (REGITEX A-6001 manufactured by Regitex Ltd.) as a solid substance at a ratio of 1:9 to 9:1. A solvent extract of the raw material pulp from the separate cardboard manufacturing machine used in Test Example 2-1 (without added acrylate) and a separate acrylate were also used as individual samples. Specifically, a mixture was obtained by mixing an extract (solid concentration of 0.06%) of a benzene and chloroform solvent mixture (1 vol:1 vol) of the product obtained by drying acrylate at 105°C for 24 hours with an extract (solid concentration of 0.03%) of a benzene and chloroform solvent mixture (1 vol:1 vol) of the dried product of the raw material pulp in the cardboard manufacturing machine, such that the ratio of solid substances was 1:9 to 9:1, and each individual solvent extract was used as a sample.

[0201] Regarding the "1160cm" in each of these samples -1 "Area of ​​absorption peak at wavenumber" and "600 to 4000 cm⁻¹" -1 The relationship between the total area of ​​the absorption peaks in the IR absorption spectrum of acrylate at the specified wavenumber was used to obtain data for each sample, and the 1160 cm⁻¹ value for each sample was calculated. -1 The absorption peak area ratio (%) at the wavenumber. Specifically, "1160 cm⁻¹". -1 Absorption peak area at wavenumber: 600 to 4000 cm⁻¹ -1The total area of ​​the absorption peaks in the IR absorption spectrum of acrylate at wavenumber is 1160 cm⁻¹ × 100 = 1160 cm⁻¹ -1 The ratio of absorption peak area at wavenumber (%).

[0202] 1160cm -1 The absorption peak area at wavenumber, the total absorption peak area in the IR absorption spectrum, and 1160 cm⁻¹ -1 The proportion of the absorption peak area at the wavenumber to the total area was obtained using area occupancy calculation software embedded in the FTIR-ART device (manufactured by JASCO). This total area also includes "1160 cm⁻¹". -1 absorption peak area at wavenumber

[0203] 1160cm in each sample -1 The relationship between the absorption peak area ratio (%) at wavenumber and the acrylate content ratio (%) of each sample is shown in the figure. Figure 7 And in Table 1.

[0204] Table 1

[0205]

[0206] 1160cm -1 The absorption peak area near the wavenumber is between 600 and 4000 cm⁻¹ -1 The proportion of the total area of ​​the absorption peaks in the IR absorption spectrum of acrylate at wavenumber increases with the proportion of acrylate in the measured samples (each sample). Figure 7 Correlation coefficient: 0.98, Regression line: Acrylate content ratio = 8.5 × 1160 cm⁻¹ -1 The absorption peak area near the wavenumber is between 600 and 4000 cm⁻¹ -1 The ratio of the total area of ​​the absorption peaks in the IR absorption spectrum of acrylate at wavenumber is -9.9.

[0207] According to test example 3, 1160cm -1 The absorption peak area near the wavenumber is between 600 and 4000 cm⁻¹ -1 The proportion of the total area of ​​absorption peaks in the IR absorption spectrum at a wavenumber can be used as a numerical indicator of the proportion of acrylate content.

[0208] Additionally, regarding samples collected at the cardboard manufacturing site using recycled waste paper, the amount of large adhesives (mm) in the raw material pulp was measured using the method described in [Test Example 1]. 2 / kg), and the number of spots (spots / day) caused by the resin in the cardboard at this time was measured. Furthermore, n spot portions of the cardboard at this time were collected, and spot solvent extracts were obtained using the method in [Test Example 1] (using the average value divided by n). IR analysis was performed using this spot solvent extract using the method in [Test Example 3], and the area occupancy calculation software embedded in the FTIR-ART device (manufactured by JASCO) was used to determine the IR spectrum of the spot solvent extract at 1160 cm⁻¹. -1 Absorption peak area at wavenumber / 600 to 4000 cm⁻¹ in the IR spectrum of the spot solvent extract -1 The absorption peak area at wavenumber was obtained for the IR 1160 cm⁻¹ of the spotted solvent extract. -1 "Peak area ratio at [location]". The total area (total value) includes the 1160 cm⁻¹ peak area in the IR spectrum of the spot solvent extract. -1 Area of ​​the absorption peak at the wavenumber.

[0209] As mentioned above, based on a single sample, the following parameters are obtained: "Number of resin spots (spots / day)" and "Amount of large adhesives in the raw material slurry (mm)". 2 / kg) and “IR1160cm of the spotted solvent extract” -1 The data collection process, which involved collecting three data points—"peak area ratio at [location]"—lasted approximately three months, with a total sample size of 78. Additionally, the IR spectroscopy of the "spot solvent extract" was used at 1160 cm⁻¹. -1 The peak area ratio at each peak categorizes the samples into groups of "1% or more" and "less than 1%", and examines their respective correlations (using a simple regression equation) (see [link to relevant documentation]). Figure 8 As a result, by setting the category to "1% or more", the correlation coefficient became as high as R. 2 =0.6.

[0210] Therefore, it can be confirmed that "IR1160" is suitable for both on-site countermeasures against resins originating from large adhesives and for managing the state of resins originating from large adhesives. -1 The peak area ratio near the 1160 cm⁻¹ in the IR spectrum (i.e., the ratio of the peak area near the 1160 cm⁻¹ in the IR spectrum) -1 The relative intensity of the wavenumber and the maximum absorption peak at nearby wavenumbers is important as a benchmark. Furthermore, it can be demonstrated that by appropriately setting suitable numerical conditions for the criteria using the conditions of each site or each process, it is more advantageous to manage resin countermeasures and resin conditions originating from large adhesives.

[0211] [Test Example 4: Cleaning Paper Machine Tools Based on the Estimated Amount of Large Adhesives in This Example]

[0212] In test example 4, a non-contact infrared analyzer was used to measure the substance adhering to the tools of the papermaking machine. At this point, 1160 cm⁻¹ -1 The absorption peak area near the wavenumber is between 600 and 4000 cm⁻¹ -1 The proportion of the total area of ​​the absorption peaks in the IR absorption spectrum at the wavenumber was 6.0%. Using a simple regression equation obtained from Table 1, the proportion of (meth)acrylate in the material adhering to the paper machine tools was calculated to be 41.1%, and this was estimated as the amount of large adhesives. As a countermeasure against large adhesives, the amount of polyoxyethylene stearyl propylene oxide (EO = 15 mol) added as a chemical to the felt spray water was increased from 20 mg / L to 50 mg / L. Similar to what has been described above, based on IR absorption spectrum analysis, the amount of large adhesives after cleaning was reduced to 24.1%. Since the reduction in large adhesives was not within the 10% range, the amount of polyoxyethylene stearyl propylene oxide (EO = 15 mol) added to the felt spray water was increased to 100 mg / L. Subsequently, the amount of large adhesives was estimated, and since this amount was 7.1% (which is within the aforementioned range), it was continuously increased. Subsequently, the estimated amount of large adhesive residue became 1% or less, thus confirming a reduction in large adhesive residue in the raw materials. The amount of polyoxyethylene stearyl propylene oxide (EO=15mol) added to the felt spray water returned to the normal level of 20 mg / L. Since the estimated amount of large adhesive residue was 5.4% (which is the normal level), the amount of polyoxyethylene stearyl propylene oxide (EO=15mol) added to the felt spray water continued at 20 mg / L.

[0213] [Explanation of reference numerals in the attached figures]

[0214] 1 raw materials

[0215] 2. Preparation process

[0216] 5 sheets of paper

[0217] 10 Papermaking process

[0218] 11 Dust Removal Process

[0219] 12 entrances

[0220] 13 mesh components

[0221] 14 Wet Sheets

[0222] 15. Pressing components

[0223] 16 Drying components

[0224] 17 White Water

[0225] 18 White Water Silos

[0226] 19 Primary circulating water

[0227] 20 secondary circulating water

[0228] 22 Resin Control Agent

Claims

1. A method for estimating the amount of large adhesives in paper manufacturing, wherein, This method makes the estimate based on the amount of acrylate polymer contained in the controlled object in paper manufacturing.

2. The method for estimating the amount of large adhesives in paper manufacturing according to claim 1, in, The managed objects are selected from one or more of the following: raw material pulp, dewatered filter cake, process water, substances adhering to the facility, final paper products, process water in the papermaking process, substances adhering to the paper machine, spots in the final paper products and their solvent extracts.

3. The method for estimating the amount of large adhesives in paper manufacturing according to claim 1 or 2. in, The amount of the acrylate polymer was measured by IR analysis.

4. The method for estimating the amount of large adhesives in paper manufacturing according to claim 1 or 2. in, Through 1160 cm⁻¹ in the IR spectrum -1 The amount of the acrylate polymer is measured by the relative intensity of the maximum absorption peak at the wavenumber and the wavenumbers nearby.

5. The method for estimating the amount of large adhesives in paper manufacturing according to claim 1 or 2. in, From relative to [(a) except for 1160 cm⁻¹ in the IR spectrum] -1 The absorption peak amount of any one of the single or multiple absorption peaks shown other than the maximum absorption peak shown at the wavenumber and nearby wavenumber, or (b) the total value of multiple absorption peak amounts selected from the single or multiple absorption peaks shown in the measurement wavenumber region other than said maximum absorption peak] [at 1160 cm⁻¹ in the IR spectrum]. -1 The amount of the acrylate polymer is measured by the wavenumber and the amount of the maximum absorption peak shown at nearby wavenumbers.

6. The method for estimating the amount of large adhesives in paper manufacturing according to claim 1 or 2. in, From [1160cm in the IR spectrum] -1 The maximum absorption peaks shown at wavenumbers and near wavenumbers are [in the IR spectrum from 600 to 4000 cm⁻¹]. -1 The amount of the acrylate polymer is measured by the ratio of the total amount of absorption peaks at a specific wavenumber.

7. A method for manufacturing paper, in, By increasing or decreasing the amount of acrylate polymers contained in the controlled objects in paper manufacturing, measures to control large adhesives in paper manufacturing can be implemented to a certain level.

8. The method for manufacturing paper according to claim 7, in, The large adhesive countermeasures are used to implement one or more of the following: a mechanism for removing foreign matter from process water, a mechanism for miniaturizing foreign matter in process water, a mechanism for cleaning the process, and a mechanism for adding chemicals to process water.

9. The method for manufacturing paper according to claim 7 or 8, in, When the amount of the acrylate polymer in the controlled object during paper manufacturing increases, the level of the large adhesive countermeasure is increased to promote the large adhesive countermeasure, or When the amount is reduced, the level of the large adhesive countermeasure is reduced to suppress the large adhesive countermeasure.

10. The method for manufacturing paper according to claim 7 or 8, in, The amount of the acrylate polymer contained in the managed object in the paper manufacturing process is measured to increase or decrease over time, and the level of the large adhesive countermeasure is controlled by feedback.

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