Macro-sticky treatment agent

Abstract

To provide a novel macro-sticky treatment technique.SOLUTION: A macro-sticky treatment agent contains one kind or two or more kinds selected from an oil-and-fat compound having a melting point of 50°C or under, a cationic group-bearing polyvinyl alcohol, and a cationic compound used for positive converting. A macro-sticky treatment method employs the macro sticky treatment agent to a macro-sticky-containing object.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a macro-sticky treatment agent and a macro-sticky treatment method. [Background technology]

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

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

[0004] The following have been proposed as internal additives for dealing with pitch problems. For example, internal additives using inorganic agents or particulate resins to reduce pitch adhesion are known. For example, Patent Document 1 proposes a papermaking pulp pitch adsorbent made by mixing natural talc powder with a small amount of non-swelling fluoromica powder. Furthermore, internal additives that prevent pitch agglomeration through the dispersing action of surfactants are known. For example, Patent Document 2 proposes a pitch-anti-adhesion agent for papermaking that contains a polymer containing, as structural units, maleic acid or maleamic acid and isobutylene, diisobutylene, or styrene, and a nonionic surfactant in a weight ratio of 50:50 to 10:90. It is known that internally added agents that fix the polymer are removed from the pitch system, and internally added agents that disperse the polymer prevent the pitch from agglomerating. For example, Patent Document 3 proposes a papermaking pitch dispersant whose active ingredient is a water-soluble polyvinyl alcohol that is composed of a structural unit represented by formula (I): and a structural unit represented by formula (II): described in the same document, and that contains approximately 70 to 80 mol % of the structural unit represented by formula (I) and approximately 30 to 20 mol % of the structural unit represented by formula (II). Furthermore, internal additives for enzymatic pitch decomposition are known. For example, Patent Document 4 proposes a method for preventing pitch problems in a mechanical pulp production process and / or a papermaking process using mechanical pulp, in which the papermaking raw materials and / or white water are treated with a fatty acid glyceride hydrolase to remove pitch from the papermaking raw materials and / or white water. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Special Publication No. 61-048975 [Patent Document 2] Special Publication No. 59-028676 [Patent Document 3] Special Publication No. 02-014479 [Patent Document 4] Special Publication No. 04-029794 Summary of the Invention [Problem to be solved by the invention]

[0006] The present inventors have recently investigated pitch problems in the papermaking process. Pitch can be broadly classified into fine pitch and macro-sticky pitch.

[0007] Fine pitch is less than 150 μm in diameter, and when water is reused, it accumulates in the process water during the papermaking process, causing problems.Internal additive treatment for fine pitch can be expected to be effective if agents with fixing, dispersing, anti-adhesive, or decomposing effects are used depending on the situation.

[0008] On the other hand, macrostickiness is said to be a large pitch with a particle diameter of 150 μm or more (quantified using a method in accordance with JIS P8231:2005), and the macrostickiness seen in paperboard is often derived from undisintegrated organic adhesives such as adhesive tape, adhesive labels, and adhesive components, which are impurities in the raw material waste paper.With the increase in the recycling rate of waste paper in recent years, low-grade waste paper, which contains a large amount of organic adhesives such as adhesive components of adhesive tape and adhesive components, has begun to be reused as raw material, and it has become important to take measures against macrostickiness, which is a large particle that is easily formed from such adhesives.

[0009] However, since macro-sticky particles are large, the pitch control effect of internal additives that exert a fixing or dispersing effect, which can be expected to be effective against fine pitch, is not sufficient against macro-sticky particles (for example, the additives used in Comparative Examples 1-1 to 1-8 shown in the Examples below).

[0010] Therefore, a main object of the present invention is to provide a new technique for macro sticky processing. [Means for solving the problem]

[0011] The present inventors have thoroughly investigated the characteristics of macrostickiness and have found new agents and conditions that can effectively treat macrostickiness. The present invention is as follows.

[0012] The present invention can provide a macro-sticky treatment agent containing one or more compounds selected from the group consisting of an oily compound having a melting point of 50°C or less, polyvinyl alcohol having a cationic group, and a cationic compound used for positive conversion. The present invention can provide a macro-sticky treatment method in which a macro-sticky treatment agent containing one or more compounds selected from an oily compound having a melting point of 50°C or less, a polyvinyl alcohol having a cationic group, and a cationic compound used for positive conversion is used on a macro-sticky-containing object. [Effects of the Invention]

[0013] According to the present invention, a new macro-sticky processing technique can be provided. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a schematic diagram showing an example of a papermaking process (a preparation process, a papermaking process, and a water recovery process) according to the present embodiment, but the processes of the present embodiment are not limited to this. [Figure 2] 1 shows an example of a graph used to calculate the estimated molecular weight of a polymer in this embodiment, where the horizontal axis represents intrinsic viscosity (η) and the vertical axis represents the average molecular weight (×104). DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, embodiments for carrying out the present invention will be described. Note that the embodiment described below shows an example of a typical embodiment of the present invention, and is not to be construed as limiting the scope of the present invention. Note that the upper and lower limit values ​​of the numerical values ​​can be arbitrarily combined as desired. Furthermore, unless otherwise specified, the symbol "to" in a numerical value means "greater than or equal to" or "less than or equal to."

[0016] 1. Macro-sticky processing technology according to the present invention

[0017] A primary object of the present invention is to provide a new technique for macro-sticky processing. After extensive research into the properties of macrostickiness, the inventors have discovered new agents and conditions for effectively treating macrostickiness. This technology is capable of detackifying macrostickiness with a significantly stronger effect, thereby enabling better treatment of macrostickiness in targets and reducing pitch problems caused by macrostickiness. Examples of this technology include (a) using one or more agents selected from a specific oily compound, a specific polyvinyl alcohol, and a specific cationic compound as a macrosticky treatment agent, and (b) using a specific cationic compound to positively convert a macrosticky-containing target. (c) The target containing macrostickiness in paper manufacturing is not particularly limited, and examples include water containing macrostickiness, and more preferably, one or more types selected from process water containing macrostickiness (e.g., pulp-containing water containing macrostickiness (hereinafter also referred to as "slurry")). This technology can be used to treat targets with a high amount of macrostickiness (e.g., content, adhesion amount). Examples of water with a high amount of macrosticky include water that is reused as reject water from screens or cleaners that have the ability to remove macrosticky particles, pulp-containing water made from recycled paper materials, and circulating pulp-containing water, and it is possible to treat such water intensively.

[0018] The macro-sticky treatment technique according to the present invention will be described in more detail below, including the macro-sticky treatment agent according to the present invention and the macro-sticky treatment method according to the present invention.

[0019] The present invention can provide a technology that has a significantly strong effect of detackifying macro-stickiness and reducing pitch problems caused by macro-stickiness. By using the present invention, defects caused by pitch are reduced, thereby reducing the broken paper rate and splice rate, and improving productivity and product (paper) quality. Furthermore, by using the present invention, paper breaks due to pitch adhering to paper machines and process equipment used in paper production can be reduced. Furthermore, by using the present invention, the frequency and time required for cleaning paper machines and equipment in paper production can be reduced. Furthermore, by using the present invention, deterioration of dewatering and moisture unevenness in paper production due to tool deterioration can be eliminated, enabling increased production volume, reduced steam consumption, and improved product quality. Furthermore, by using the present invention, rejected raw materials can be reused, and inexpensive raw materials with high impurities can be used.

[0020] The present invention provides a technology for reducing stains caused by macrostickiness in paper machines and the resulting defects (spots) and paper breaks, thereby enabling the efficiency of paper manufacturing work or man-hours and the improvement of paper product quality. The present invention also provides a technology targeted at paperboard machines prone to pitch problems caused by macrostickiness, which is undissociated sticky matter derived from tapes and labels contained in recycled paper raw materials. Furthermore, the present invention provides a technology for preventing adhesion of macrostickiness to paper machines and coarsening of macrostickiness due to adhesion of macrostickiness to each other by reducing the stickiness of macrostickiness through chemical treatment.

[0021] 2. Macro-sticky treatment agent according to the present invention In the description of the macro-sticky treatment agent in this embodiment, the descriptions of the target, liquid oily compound, cationic polyvinyl alcohol, cationic compound for positive conversion, and each treatment method, which overlap with the above "1." and the following "3." and "4.", will be omitted as appropriate, but the descriptions in "1.", "3.", "4.", etc. also apply to this embodiment and can be adopted as appropriate. Furthermore, in the description of an example of a macro-sticky treatment method in this embodiment, the description below can also apply to this embodiment and can be adopted as appropriate.

[0022] The present invention provides a macro-sticky treatment agent containing one or more compounds selected from the group consisting of an oily compound having a melting point of 50°C or less (hereinafter also referred to as a "liquid oily compound"), a polyvinyl alcohol having a cationic group (hereinafter also referred to as a "cationic PVA"), and a cationic compound used for positive conversion (hereinafter also referred to as a "cationic compound for positive conversion"). The cationic compound is preferably water-soluble, meaning that the solubility in water at 20°C is 0.01% or more, and examples of such compounds include commercially available products or compounds that are described as water-soluble in the compound description.

[0023] 2-1. Liquid oily compounds The oily compound having a melting point of 50°C or less used in the present invention is not particularly limited, but is preferably an oily compound having a melting point lower than 50°C and being liquid at temperatures equal to or higher than the melting point. The melting point of the oily compound is preferably 30°C or less, more preferably 10°C or less, and is preferably 0°C or higher. In this specification, the melting point of a compound can be measured in accordance with JIS K0064-1992.

[0024] The liquid oily compound used in the present invention is preferably one that has almost no solubility in water, such as water-insoluble or poorly water-soluble. In such cases, it is preferable to use the liquid oily compound while dispersing it in water. The solubility of the liquid oily compound in water (20°C) is preferably 0.3% or less, more preferably 0.2% or less, even more preferably 0.1% or less, and more preferably 0.1% or less, which is substantially insoluble in water. In addition, the liquid oily compound is preferably a hydrophobic compound that undergoes phase separation with water. In this specification, the solubility was determined as the maximum concentration at which no dispersion or precipitate was observed after stirring a mixture of pure water and the target substance at various mixing ratios at 20°C for 1 hour. The liquid oily compound is preferably a compound that is substantially insoluble in water and can be dispersed when used (added, etc.) in a target substance. The dispersion can be appropriately carried out by a physical dispersion method such as stirring, mixing, or spraying, or by a chemical dispersion method using an emulsifier (preferably at a concentration of 0.5 to 3%).

[0025] The liquid oily compound preferably has a hydrophilic moiety and / or a glycerol skeleton. The "hydrophilic moiety" is not particularly limited, but preferably contains a hydrophilic group. Examples of the hydrophilic group include a hydroxyl group (-OH), a carboxyl group (-COOH), a sulfonic acid group (-SO3H), a phosphate group (-O4PH2), an acyl group (-(C=O)-), an amino group (-NH2, -NHR, -NRR'), an ether bond moiety, and an ester bond moiety. Examples of the ester bond moiety include, but are not limited to, carboxylic acid esters, carbonate esters, phosphate esters, and nitrate esters. One or more of these hydrophilic moieties can be selected, and the hydrophilic group may be in the form of a salt. Among the hydrophilic groups, a hydroxyl group or a carboxyl group is preferred, and a hydroxyl group is more preferred. Examples of salts include, but are not limited to, alkali metal salts (Li, Na, K, etc.), alkaline earth metal salts (Mg, Ca, etc.), mineral acid salts (hydrochloric acid, sulfuric acid, phosphoric acid, etc.), and organic acid salts (lactic acid, citric acid, etc.).

[0026] Furthermore, the "glycerol skeleton" is not particularly limited, but may be ROCH2-CH(OR)-CH2OR, where each R is preferably the same or different saturated or unsaturated hydrocarbon group (preferably having 6 to 30 carbon atoms). The oily compound having the glycerol skeleton is more preferably one in which one, two, or three molecules of higher fatty acid are ester-bonded to one glycerin molecule, and even more preferably a triglyceride in which three molecules of higher fatty acid are ester-bonded.

[0027] Of the liquid oily compounds used in the present invention, oily compounds having a hydrophilic group and a solubility in water of 0.1% or less, and / or the oily compounds having a glycerol skeleton and a solubility in water of 0.1% or less are suitable. Examples of the oily compound having a hydrophilic group and a water solubility of 0.1% or less include polyalkylene oxide compounds, glycerol alkylene oxide adducts, higher fatty acid alkylene oxide adducts, etc. Examples of the oily compound having a glycerol skeleton and a water solubility of 0.1% or less include vegetable oils, triglycerides, etc. One or more compounds selected from these can be used. [Method for measuring weight average molecular weight by GPC analysis] The weight average molecular weight in this specification can be measured by GPC (gel permeation chromatography) analysis using a standard substance.

[0028] The liquid oily compound used in the present invention is preferably a polyalkylene oxide compound and / or a glycerin ester compound.

[0029] The liquid oily compound can reduce the stickiness resulting from macrostickiness or from undissociated sticky matter that causes macrostickiness. Examples of the liquid oily compound include liquid polyalkylene oxide compounds, liquid glycerin ester compounds, liquid hydrocarbon compounds, higher alcohols, and surfactants, and one or more selected from these can be used. Each of the liquid oily compounds may be used alone or in combination of two or more. Furthermore, the liquid oily compound may be a synthetic product or a commercially available product.

[0030] 2-1-1. Liquid polyalkylene oxide compounds The liquid polyalkylene oxide compound is preferably a compound having at least a polyalkylene oxide moiety.

[0031] Among the liquid polyalkylene oxide compounds, the compound represented by the following general formula (1) is preferred, and the compound represented by the following general formula (2) is more preferred.

[0032] The weight average molecular weight of the liquid polyalkylene oxide compound is not particularly limited, but is preferably 100 to 50,000, more preferably 500 to 30,000, and even more preferably 1,000 to 10,000. The weight average molecular weight of the liquid polyalkylene oxide compound can be measured by GPC analysis, using a standard polymer: polyethylene oxide as a reference material.

[0033] [ka]

[0034] R in the general formula (1) 1 and R 2 are each preferably independently a hydrogen atom (H) or a hydrocarbon group, and more preferably R 1 and R 2 are hydrogen atoms.

[0035] R 1 and R 2 The hydrocarbon group in may be either a saturated hydrocarbon group or an unsaturated hydrocarbon group, but is preferably a saturated hydrocarbon group. The hydrocarbon group is preferably an aliphatic hydrocarbon group, and more preferably an alkyl group. The number of carbon atoms in the hydrocarbon group is not particularly limited, but is preferably 1 to 5. The hydrocarbon group may be either a chain (straight chain or branched chain) or an alicyclic group, but is preferably a chain group.

[0036] R 1 and R 2Examples of the alkyl group having 1 to 5 carbon atoms in the formula (I) include a methyl group, an ethyl group, a propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, an n-pentyl group, an isopentyl group, a neopentyl group, a 1-ethylpropyl group, a sec-pentyl group, a 1-methylbutyl group, a 2-methylbutyl group, and a 1,2-dimethylpropyl group, and one or more of these may be used.

[0037] In addition, R 1 and R 2 may be bonded to each other to form a ring. 1 and R 2 are bonded to each other to form a ring, and A in the general formula (1) is an ethylene group, examples of the compound represented by the general formula (1) include, but are not limited to, cyclic polyether compounds called crown ethers.

[0038] "(OA)" in the formula (1) is preferably an oxyalkylene group or a polyoxyalkylene group, and the total number of moles of the polyoxyalkylene groups added (n in the general formula (1)) is preferably 2 to 1000, more preferably 5 to 500, even more preferably 10 to 200, and even more preferably 20 to 100. Here, the number of moles of the polyoxyalkylene groups added is an integer value for a single molecule, and can be a rational number that is an average value for an aggregate of multiple types of molecules. Hereinafter, the number of moles added will be defined in the same way. In addition, "(OA) n In the formula "a", a plurality of different alkylene oxides may be added, and in this case, the arrangement may be random or block.

[0039] The number of repetitions of n in the general formula (1) may be expressed by the weight-average molecular weight of the compound. The weight-average molecular weight of the compound represented by the general formula (1) is the same as the weight-average molecular weight of the polyalkylene oxide compound, and is preferably 1,000 to 10,000.

[0040] In the general formula (1), the "A" is not particularly limited, but preferably represents an alkylene group, and the number of carbon atoms therein is preferably 1 to 4, more preferably 2 to 4. The alkylene group may be either chain (straight chain or branched chain) or alicyclic, and is preferably chain.

[0041] Examples of the alkylene group in A include methylene (-CH-), ethylene (-(CH)-), trimethylene (-(CH)-), propylene (-CH(CH)CH-), butylene (n-, iso-, sec-, tert-), and pentyl (n-, iso-, neo-) groups, among which ethylene and propylene groups are preferred. One or more selected from these groups may be used.

[0042] The polyalkylene oxide compound represented by the general formula (1) is not particularly limited, but examples thereof include polyalkylene glycols such as polypropylene glycol and polybutylene glycol; block copolymers consisting of polyethylene oxide blocks and polypropylene oxide blocks; and polyalkylene glycol copolymers such as ethylene glycol-propylene glycol copolymers, such as random copolymers of ethylene and propylene oxide. Among these, polypropylene glycol is preferred.

[0043] The polypropylene glycol is not particularly limited, but examples thereof include PPG2000, PPG4000, etc., and one or more selected from these may be used.

[0044] As the liquid polyalkylene oxide compound, a compound represented by the following general formula (2) is suitable, and a polyalkylene oxide diol compound is also suitable. Examples of the compound represented by the general formula (2) include polypropylene glycol and polyalkylene glycol copolymers. Among these, polypropylene glycol and ethylene glycol-propylene glycol copolymers are suitable. One or more selected from these can be used.

[0045] [ka]

[0046] "(OA)" in the general formula (2) n ", "OA", "A" and the like refer to "(OA)" in the general formula (1). n "," "OA," "A," etc. are preferably employed. The weight-average molecular weight of the compound represented by the general formula (2) is preferably 1,000 to 10,000. "A" in the general formula (2) is preferably an alkylene group having 1 to 4 carbon atoms, more preferably having 2 to 4 carbon atoms, and the alkylene group is preferably a chain (straight chain, branched chain). Of the alkylene groups in A in the general formula (2), an ethylene group and / or a propylene group is preferred, and a propylene group is more preferred.

[0047] The liquid polyalkylene oxide compound may be used alone or in combination of two or more kinds. The polyalkylene oxide compound may be a synthetic product or a commercially available product.

[0048] 2-1-2. Liquid glycerin ester compounds

[0049] The liquid glycerin ester compound used in the present invention is preferably a compound in which a hydroxyl group of glycerin forms an ester bond with, for example, a compound having one or more carboxyl groups. The liquid glycerin ester compound is more preferably an ester compound of glycerin and a fatty acid (hereinafter also referred to as "liquid glycerin fatty acid ester").

[0050] The liquid glycerin fatty acid ester used in the present invention is not particularly limited, and examples thereof include monoglycerides, diglycerides, triglycerides, organic acid monoglycerides, polyglycerin fatty acid esters, etc., and one or more selected from these can be used. While triglycerides (triacylglycerols) are generally said to lack emulsifying properties, the term "liquid glycerin fatty acid esters" as used herein includes liquid glycerin fatty acid esters and triglycerides (triacylglycerols). Monoglycerides, diglycerides, and triglycerides are also called monoacylglycerols, diacylglycerols, and triacylglycerols, respectively.

[0051] As the liquid glycerin ester compound, it is more preferable to use one or more selected from monoglycerides, diglycerides, triglycerides, and vegetable oils. Of the liquid glycerin ester compounds, triglycerides and naturally-occurring vegetable oils are even more preferable, and triglycerides (preferably triglycerides derived from vegetable oils) are even more preferable.

[0052] The liquid glycerin ester compound may be produced, for example, by reacting a higher fatty acid obtained from fats and oils with glycerin, and in this process, monoglycerides, diglycerides, triglycerides, etc. can also be appropriately produced. A higher fatty acid is a type of aliphatic monocarboxylic acid, which is a monocarboxylic acid of a long-chain hydrocarbon, and preferably has 6 or more carbon atoms.

[0053] The number of carbon atoms of the fatty acid constituting the liquid glycerin ester compound is preferably 6 or more, more preferably 12 to 30, even more preferably 14 to 24, and even more preferably 16 to 22. The fatty acid may be either a saturated fatty acid or an unsaturated fatty acid, and may be either a chain (straight-chain or branched-chain) or an alicyclic fatty acid, with a chain being preferred and a straight-chain being more preferred. The fatty acid is preferably a higher fatty acid.

[0054] Examples of the higher fatty acids include saturated fatty acids such as caproic acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, and behenic acid; and unsaturated fatty acids such as palmitoleic acid, oleic acid, linoleic acid, linolenic acid, erucic acid, arachidonic acid, eicosapentanoic acid, and docosahexaenoic acid. One or more of these can be selected. Among these, it is preferable that the fatty acid contains at least one or more selected from oleic acid, linoleic acid, linolenic acid, and erucic acid.

[0055] The liquid glycerin ester compound can be obtained by purifying, by a known method, a natural glycerin ester compound obtained from natural sources such as plants (e.g., fruits, seeds, or flowers) or animals (e.g., fish oil), or by separating and repurifying the purified glycerin ester compound by a known method utilizing a difference in melting point, thereby obtaining a vegetable oil, triglyceride, diglyceride, or monoglyceride, as appropriate. As the natural glycerin ester compound, a glycerin ester compound derived from a microorganism may also be used.

[0056] The naturally-derived liquid glycerin ester compound (preferably triglyceride) is not particularly limited, and examples thereof include vegetable oils such as linseed oil, sunflower oil, soybean oil, rapeseed oil, sesame oil, olive oil, palm kernel oil, palm oil, and coconut oil, and glycerin ester compounds derived from such vegetable oils. One or more selected from these can be used. Among these, vegetable oils and / or triglycerides derived from plants are preferred, and rapeseed oil and / or triglycerides derived from rapeseed are more preferred. Among vegetable oils and glycerin ester compounds derived from such vegetable oils, plant-derived triglycerides are preferred. In general, the fatty acids constituting vegetable oil-derived glycerin esters are higher fatty acids.

[0057] The liquid glycerin ester compound is preferably one that is substantially insoluble in water and remains oily, and more specifically, is preferably one that is substantially insoluble in water and remains oily when added at a concentration of 30 to 3000 mg / L per 1 L of water.

[0058] The liquid glycerin ester compound may be used alone or in combination of two or more thereof. Furthermore, the liquid glycerin ester compound may be a synthetic product or a commercially available product.

[0059] 2-1-3. Liquid hydrocarbon compounds The liquid hydrocarbon compound may be either linear or alicyclic. More specifically, examples include squalane, liquid paraffin, liquid isoparaffin, hydrogenated polyisobutene, α-olefin oligomers, and liquid hydrocarbon paraffins (more preferably aliphatic hydrocarbons having 11 to 23 carbon atoms) such as n-heptadecane, n-octadecane, n-nonadecane, n-eicosane, n-heneicosane, n-docosane, n-tricosane, n-undecane, n-tridecane, n-dodecane, n-tetradecane, n-pentadecane, and n-hexadecane. Among these, liquid hydrocarbon paraffins are preferred, and liquid paraffin is more preferred. One or more selected from these may be used. The weight average molecular weight of the liquid hydrocarbon oil is not particularly limited, but is preferably 1,000 to 10,000. The weight average molecular weight of the liquid hydrocarbon oil can be measured by GPC analysis using a standard polymer: polystyrene as a reference material.

[0060] The liquid hydrocarbon compound (preferably liquid hydrocarbon paraffin) may be used alone or in combination of two or more. Furthermore, the liquid hydrocarbon compound (preferably liquid hydrocarbon paraffin) may be a synthetic product or a commercially available product.

[0061] 2-1-4. Higher alcohol The higher alcohol may be either saturated or unsaturated, and examples thereof include lauryl alcohol, tetradecyl alcohol, myristyl alcohol, cetyl alcohol, higher alcohols extracted from natural fats and oils, and mixtures thereof. One or more selected from these may be used. The number of carbon atoms in the higher alcohol is, for example, about 8 to 16, more preferably 10 to 14, and even more preferably 10 to 12.

[0062] The higher alcohol may be used alone or in combination of two or more kinds. Furthermore, the higher alcohol may be a synthetic product or a commercially available product.

[0063] 2-2.Cationic polyvinyl alcohol The polyvinyl alcohol having a cationic group (hereinafter also referred to as "cationic polyvinyl alcohol (PVA)" or "cationized PVA") used in the present invention is not particularly limited. The cationic group in the cationic polyvinyl alcohol may be an amino group, an imino group, a guanidino group, a quaternary ammonium base, or the like. The cationic group may preferably be one or more selected from these, and more preferably a quaternary ammonium base. The cationic polyvinyl alcohol can reduce the stickiness resulting from macrostickiness or from undisintegrated sticky matter that causes macrostickiness.

[0064] The cationic polyvinyl alcohol preferably has a cationic group on the side chain, and more preferably has a hydroxyl group on the side chain, and preferably has vinyl alcohol structural units corresponding to the degree of saponification, structural units derived from vinyl ester monomers in the unsaponified portion, and cationic structural units.

[0065] The saponification degree (according to JIS K6726-1994) of the cationic polyvinyl alcohol is not particularly limited, but the lower limit is preferably 50 mol% or more, more preferably 60 mol% or more, even more preferably 70 mol% or more, more preferably 80 mol% or more, and more preferably 85 mol% or more, and the upper limit is preferably 100 mol% or less, more preferably 99 mol% or less, even more preferably 95 mol% or less, and more preferably 90 mol% or less, and the preferred numerical range is preferably 80 to 95 mol%. Note that a higher saponification degree generally leads to higher solubility in water. [Method for measuring the degree of saponification] The saponification degree can be measured in accordance with JIS K6726.

[0066] The average degree of polymerization of the cationic polyvinyl alcohol is not particularly limited, but the preferred lower limit is preferably 100 or more, more preferably 300 or more, even more preferably 500 or more, and more preferably 1000 or more, and the preferred upper limit is preferably 5000 or less, more preferably 4000 or less, and even more preferably 3000 or less, and the preferred numerical range is preferably 1000 to 3000. [Method for measuring average degree of polymerization] The average degree of polymerization can be measured in accordance with JIS K6726.

[0067] The colloid equivalent of the cationic polyvinyl alcohol is not particularly limited, but a suitable lower limit is preferably 0.01 meq / g or more, more preferably 0.05 meq / g or more, even more preferably 0.1 meq / g or more, and more preferably 0.2 meq / g or more, and a suitable upper limit is preferably 10 meq / g or less, more preferably 5 meq / g or less, even more preferably 2 meq / g or less, and more preferably 1 meq / g or less, and the suitable numerical range is preferably 0.1 to 2 meq / g.

[0068] The degree of cationization can be expressed by the colloid equivalent value, which can be measured by the following method for measuring the colloid equivalent value of a cation. [Method for measuring colloidal equivalent value of cation] A 0.5% by weight aqueous solution of sulfuric acid is added to a 50 ppm aqueous solution of the sample (diluted with pure water), and the solution is stirred and adjusted to pH 3. Two to three drops of toluidine blue indicator (manufactured by Wako Pure Chemical Industries, Ltd.) are added, and the solution is titrated with N / 400 polyvinyl alcohol potassium sulfate solution (manufactured by Wako Pure Chemical Industries, Ltd.). The endpoint is the point at which the blue color changes to reddish purple and the reddish purple color does not disappear after a few seconds. A blank test is also performed using pure water. Colloid equivalent value of cation (meq / g) = [measured value of sample (ml) - titration amount of blank test (ml)] / 2

[0069] The cationic polyvinyl alcohol used in the present invention can be obtained by a known production method, for example, by saponifying a copolymer of an unsaturated monomer having a cationic group and a vinyl ester monomer. The copolymer of an unsaturated monomer having a cationic group and a vinyl ester monomer can be obtained by a conventional known polymerization method. Furthermore, a saponified product of the copolymer can be obtained by a commonly known method, such as a method of saponifying a vinyl ester copolymer. The saponification may be further modified, for example, by acetoacetate esterification, acetalization, urethanization, etherification, grafting, phosphate esterification, or oxyalkylenation.

[0070] Examples of cationic groups of unsaturated monomers include amino groups, imino groups, guanidino groups, and quaternary ammonium bases, with quaternary ammonium bases being preferred. Examples of unsaturated monomers having a quaternary ammonium base include, but are not limited to, diallyldimethylammonium chloride. Examples of vinyl ester-based monomers include, but are not limited to, vinyl formate, vinyl acetate, vinyl propionate, vinyl valerate, vinyl butyrate, vinyl isobutyrate, vinyl pivalate, vinyl caprate, vinyl laurate, vinyl stearate, vinyl benzoate, and vinyl versatate. One or more selected from these can be used. Among these, vinyl acetate is preferred. In addition to the unsaturated monomer having a cationic group and the vinyl ester-based monomer, a copolymerizable unsaturated monomer may also be copolymerized. These monomers may be used alone or in combination. For example, a saponified copolymer of vinyl acetate and diallyldimethylammonium chloride can be used as a copolymer.

[0071] The cationic polyvinyl alcohol may be used alone or in combination of two or more kinds. The cationic polyvinyl alcohol may be a synthetic product or a commercially available product.

[0072] 2-3. Cationic compounds for positive conversion The cationic compound used in the present invention for positive conversion (hereinafter also referred to as "cationic compound for positive conversion") is not particularly limited. The cationic compound for positive conversion may be a cationic compound-containing agent or cationic drug used for positive conversion of a macrosticky-containing object, or may be an agent containing a cationic compound and used in an amount greater than or equal to the amount that converts the macrosticky-containing object to positive, to treat the macrostickiness. The cationic compound for positive conversion is not particularly limited, but examples thereof include cationic surfactants and cationic polymer compounds.

[0073] The cationic compound for positive conversion is a cationic compound for converting the state of a target containing macrosticky to a positive state by increasing the amount added, and it is preferable to add an amount greater than or equal to the amount that converts the target to a positive state.

[0074] In this specification, "positive conversion" is defined as follows. Pulp slurry, which is a raw material for papermaking, is usually anionic, and adding a cationic compound to it to create a cation excess state is called positive conversion. "Positive conversion" or "making a positive conversion" means that the zeta potential or streaming potential changes from - (negative) to + (positive). In the present invention, the zeta potential of the object to be treated (e.g., object such as raw material slurry, pulp-containing water, or reject water) is measured, and the change in zeta potential is observed, and the change from - (negative) to + (positive) is judged to be "positive conversion" or "amount sufficient to convert to positive or more than the amount sufficient to convert to positive."

[0075] The raw material slurry contains anionic substances such as pulp fibers or anionic trash, which are more reactive with cationic compounds than macrostickies. Therefore, when a cationic compound is added to the raw material slurry, substances other than macrostickies react with the cationic compound first. When all substances other than macrostickies react with the cationic compound, the cationic compound becomes surplus. When this surplus state is reached, the object containing macrostickies (e.g., raw material slurry or pulp-containing water) becomes "positive." By adding an amount of cationic compound to the object containing macrostickies that is greater than or equal to the amount that causes the object to become positive, the excess cationic compound reacts with the macrostickies. This reduces the stickiness derived from the macrostickies or the undisintegrated sticky matter that causes their formation.

[0076] That is, the cationic compound used for positive conversion in the present invention can reduce the stickiness caused by macrostickiness. By using (adding, blending, mixing, etc.) the cationic compound for positive conversion in an amount equal to or greater than the amount that causes the target containing macrostickiness to be positively converted in the paper manufacturing process, the stickiness caused by macrostickiness can be more efficiently reduced. Furthermore, it is preferable to use (add, etc.) the cationic compound for positive conversion in an amount greater than the amount required to positively convert a macrosticky-containing target, which allows for effective treatment of the macrostickiness contained in the target in the paper manufacturing process and reduces the stickiness resulting from the macrostickiness or from the undissociated sticky matter that causes the macrostickiness to form, thereby preventing the macrostickiness in the process water from adhering to other objects and from becoming coarse in the process water. In this case, it is more preferable to use a cationic surfactant or a cationic polymer compound among the cationic compounds for positive conversion.

[0077] The cationic surfactant used in the present invention is not particularly limited, but examples include quaternary tetraalkylammonium salts such as dodecyltrimethylammonium chloride and didodecyldimethylammonium chloride; quaternary benzylammonium salts such as benzyldimethyldodecylammonium chloride, benzyldimethyltetradecylammonium chloride, and benzyldimethyloctadecylammonium chloride; and pyridinium salts such as N-dodecylpyridinium chloride. One or more selected from these can be used. Among these, benzyldimethylalkylammonium chloride, commonly known as benzalkonium chloride, is preferred. The alkyl group of the benzyldimethylalkylammonium salt preferably has 10 to 20 carbon atoms, more preferably 12 to 16 carbon atoms.

[0078] The cationic polymer compound used in the present invention is not particularly limited, and examples thereof include polymer compounds having a diallyldialkylammonium salt structure represented by general formula (3) or general formula (4), a vinylpyridinium salt structure represented by general formula (5), a (meth)acryloyloxyethyltrialkylammonium salt structure represented by general formula (6), a cyclic amidine ammonium salt structure represented by general formula (7), an addition polymer structure of a dialkylamine and epihalohydrin represented by general formula (8), and an addition polymer structure of an N,N,N',N'-tetraalkylalkylenediamine and alkylene dihalide represented by general formula (9), and one or more selected from these may be used.

[0079] [ka]

[0080] [ka]

[0081] In the present invention, either a homopolymer or a copolymer having these structures can be used as the cationic polymer compound, and further, cationic polymer compounds copolymerized with nonionic monomers such as (meth)acrylamide, (meth)acrylonitrile, methyl (meth)acrylate, ethyl (meth)acrylate, 2-hydroxyethyl (meth)acrylate, styrene, vinyl acetate, and N-vinylpyrrolidone can also be used. Among these cationic polymer compounds, poly(diallyldimethylammonium chloride) having a structural unit represented by general formula (4) can be particularly preferably used. Specific examples of the polymer compound having the (meth)acryloyloxyethyltrialkylammonium salt structure include, but are not limited to, a copolymer of acrylamide and acryloyloxyethyltrimethylammonium chloride, and a polymer of methacryloyloxyethyltrimethylammonium chloride. Specific examples of the polymer compound having the ammonium salt structure of a cyclic amidine include, but are not limited to, a copolymer of acrylamide, acrylonitrile, N-vinylacrylamidine hydrochloride, N-vinylacrylamide, vinylamine hydrochloride, and N-vinylformamide. Specific examples of the polymer compound having an addition polymer structure of dialkylamine and epihalohydrin include, but are not limited to, alkylamine-epichlorohydrin condensates.

[0082] The number average molecular weight (Mn) of the cationic polymer compound (more preferably polydiallyldimethylammonium salt) is not particularly limited, but the preferred lower limit is preferably 1,000 or more, more preferably 5,000 or more, and even more preferably 10,000 or more, and the preferred upper limit is preferably 1,000,000 or less, more preferably 800,000 or less, even more preferably 500,000 or less, and even more preferably 400,000 or less, and the preferred numerical range is preferably 10,000 to 500,000.

[0083] [Method for calculating the estimated average molecular weight of a water-soluble cationic polymer compound] In this specification, the molecular weight of a water-soluble cationic polymer compound can be estimated by determining the relationship between intrinsic viscosity and average molecular weight. More specifically, the relationship between intrinsic viscosity and average molecular weight is determined from various polymers whose intrinsic viscosity and average molecular weight are known. The intrinsic viscosity of a sample polymer is measured. The intrinsic viscosity of the sample polymer is applied to the relationship between intrinsic viscosity and average molecular weight, and the average molecular weight of the sample polymer is determined from this relationship. The determined average molecular weight is used as the estimated average molecular weight of the sample polymer. Note that Figure 2 shows data for a DAM(CH3Cl) (2-methacryloyloxyethyltrimethylammonium chloride) polymer. In the case of cationic PVA, the average molecular weight may be calculated by multiplying the degree of polymerization by 207.5.

[0084] [How to determine the estimated average molecular weight of various polymers (water-soluble cationic polymer compounds)] The intrinsic viscosity [η] of a polymer (water-soluble cationic polymer compound) determined according to the method for determining intrinsic viscosity based on the Huggins formula in the "Intrinsic Viscosity Measurement Method" below is calculated by multiplying the [η] determined from the molecular weight measurement results by the light scattering method by the average molecular weight (×10 4 ) (see, for example, Figure 2) and from this correlation, the average molecular weight of the polymer is calculated, which can be used as the estimated molecular weight of the polymer (water-soluble cationic polymer compound) based on the relationship between intrinsic viscosity and average molecular weight.

[0085] [Intrinsic viscosity measurement method] The intrinsic viscosity can be determined according to the procedures (I) to (V). (I) Immerse five Cannon-Fenske viscometers (No. 75, manufactured by Kusano Chemical Co., Ltd.) in a neutral detergent for glassware for at least one day, then wash thoroughly with water and dry. (II) Using the same procedure as in the above-mentioned measurement of colloidal equivalent value, the W / O emulsion type polymer is diluted with water to prepare an aqueous solution with a polymer concentration of 0.2% by mass. (III) 50 mL of a 2 mol / L aqueous solution of sodium nitrate was added to 50 mL of the 0.2% polymer solution prepared in (II) above, and the mixture was stirred at 500 rpm for 20 minutes using a magnetic stirrer to obtain a 1 mol / L aqueous solution of sodium nitrate with a 0.1% polymer concentration. This was then diluted with a 1 mol / L aqueous solution of sodium nitrate to prepare polymer solution samples with five different polymer concentrations: 0.02, 0.04, 0.06, 0.08, and 0.1% by mass. A 1 mol / L aqueous solution of sodium nitrate without added polymer served as a blank solution. (IV) Five viscometers prepared in (I) were installed vertically in a thermostatic water bath adjusted to a temperature of 30°C (within ±0.02°C). 10 mL of blank solution was added to each viscometer using a volumetric pipette, and the viscometers were left to stand for approximately 30 minutes to stabilize the temperature. The liquid was then drawn up using a dropper and allowed to fall naturally. The time it took for the liquid to pass the marked line was measured to the nearest 1 / 100 second using a stopwatch. This measurement was repeated five times for each viscometer, and the average value was taken as the blank value (t0). (V) (III) 10 mL of each of the polymer solution samples with five polymer concentrations prepared in (III) is placed in the five viscometers used to measure the blank solution, and allowed to stand for approximately 30 minutes to stabilize the temperature. After that, the same procedure as for the blank solution measurement is repeated three times, and the average value of the transit time for each concentration is taken as the measured value (t). From the blank value t0, the measured value t, and the concentration of the polymer solution sample [mass / volume %] (= C [g / dL]), the relative viscosity ηrel, specific viscosity ηSP, and reduced viscosity ηSP / C [dL / g] are calculated using the relational expressions shown in the following formulas (5) and (6). ηrel=t / t0 (5) ηSP=(t-t0) / t0=ηrel-1 (6) From these values, the intrinsic viscosity [η] of each polymer is calculated according to the method for calculating intrinsic viscosity based on the Huggins equation described above.

[0086] The cationic compound for cation conversion used in the present invention may be used alone or in combination of two or more kinds. In addition, the cationic compound for cation conversion may be a synthetic product or a commercially available product.

[0087] 2-4.<Optional ingredients> In the present invention, in addition to the liquid oily compound, cationic PVA, or cationic compound for positive conversion, optional components may be added simultaneously or separately to a target such as an aqueous system, or may be contained in a pharmaceutical formulation, as long as the effects of the present invention are not impaired. Examples of optional components include, but are not limited to, salts, thickeners, dispersants, surfactants, pH adjusters, antifoaming agents, and preservatives, and one or more selected from these may be used.

[0088] 2-5. Uses and usage of the present invention The liquid oily compound, cationic PVA, or cationic compound for cationic conversion (hereinafter, these are also referred to as the compounds used in the present invention) used in the present invention has, for example, an effect of reducing adhesion caused by macrostickiness or undissociated sticky matter that causes macrostickiness, an effect of reducing pitch staining during the papermaking process, and an effect of reducing pitch-related defects and paper breakage during the papermaking process. Examples of such treatment effects include preventing macrostickiness from adhering, preventing macrostickiness from coarsening, and reducing staining, and one or more selected from these may be used, but are not limited to these. Because the compounds used in the present invention have the above-mentioned macrostickiness treatment effects, the compounds used in the present invention can be incorporated into or used in agents such as pitch stain treatment agents, macrosticky treatment agents, and agents for the papermaking process. In the present invention, the compounds used in the present invention themselves can also be used as agents such as pitch stain treatment agents and macrosticky treatment agents for the papermaking process.

[0089] The present invention can also provide compounds (e.g., liquid oily compounds, cationic PVA, cationic compounds for positive conversion) used for the purposes of the above-mentioned pitch stain treatment, macro-stickiness treatment, and the like. The compounds used in the present invention can also be used to produce agents or preparations such as the above-mentioned pitch stain treatment agents and macro-stickiness treatment agents. The present invention can also provide a method for treating pitch stains, a method for treating macro-stickiness, and the like in a papermaking process, in which the compounds used in the present invention are used or added to the papermaking process or equipment used in the papermaking process. The compounds used in the present invention can be one or more selected from liquid oily compounds, cationic PVA, and cationic compounds for positive conversion.

[0090] The form of the agent used in the present invention is not particularly limited, and may be liquid, slurry, or powder. The method of use, amount of use, and location of use of the compound used in the present invention can be appropriately adopted from the treatment method of the present invention described below.

[0091] The compound used in the present invention is preferably used in a paper manufacturing process, for example, one or more processes selected from a paper preparation process, a papermaking process, and a water recovery process, and among these, it is preferably used in a stock process (paper preparation process) and / or a papermaking process. The chemicals used in the present invention are preferably those intended for use on rejects generated in the screen or cleaner of the stock process or papermaking process in paper manufacturing. It is also suitable for use on slurry or dewatered cake in the process of producing paper using paper raw materials.

[0092] 3. Macro-sticky processing method according to the present invention In the description of the macro-sticky treatment method of this embodiment, the description of each configuration and each treatment method of the target, liquid oily compound, cationic polyvinyl alcohol, positive conversion cationic compound, etc., which overlaps with the above-mentioned "1." and "2." and the later-described "4.", etc., will be omitted as appropriate, but the descriptions of "1.", "2.", "4.", etc. also apply to this embodiment and can be adopted as appropriate. Furthermore, in the description of an example of the macro-sticky treatment method of this embodiment, the description below can also apply to this embodiment and can be adopted as appropriate.

[0093] This embodiment can provide a macrosticky treatment method in which one or more compounds selected from an oily compound having a melting point of 50°C or less, a polyvinyl alcohol having a cationic group, and a cationic compound used for positive conversion, or a macrosticky treatment agent containing such a specific compound, is used on an object containing macrostickiness. The compound or agent used in this embodiment can be mixed with the object to be treated to perform macrosticky treatment. This embodiment may also be a method for making macrosticky non-sticky or a method for reducing the stickiness of macrosticky.

[0094] A more suitable method for treating macrostickiness is to use (add, etc.) the cationic compound for positive conversion in an amount greater than that at which the macrosticky-containing object is converted to positive. A more preferred method for treating macrostickiness involves using (e.g., adding) the cationic compound to the macrosticky-containing object in an amount greater than the amount that causes positive conversion, and then using (e.g., adding) an anionic agent and / or another slurry until the positive conversion is eliminated.

[0095] In this embodiment, the target of treatment may be anything related to various processes in paper manufacturing that contain macrostickiness, such as various process waters, various process slurries, and various process dehydrated cakes, and the target may be one or more selected from these, but is not limited to these.

[0096] In this embodiment, the target macrosticky-containing material to be treated is preferably a slurry (pulp-containing water) produced during a paper manufacturing process using waste paper raw materials. In particular, waste paper raw materials include waste paper (e.g., newspapers, cardboard, magazines, etc.) with adhesive tape, labels, etc. attached. Therefore, the greater the amount of such waste paper, the greater the amount of macrosticky-causing components (preferably (meth)acrylate-based components) contained. The macrosticky material in a slurry made from waste paper is primarily composed of undissociated adhesive matter from the adhesive tape, labels, and adhesives that are contaminants. This undissociated matter is removed using a screen or cleaner. Therefore, the rejects from the screen or cleaner in the raw material process or papermaking process contain concentrated macrosticky material. According to this embodiment, such rejects can be treated, allowing them to be reused as raw materials.

[0097] According to this embodiment, by treating slurry, dehydrated cake, pulp-containing water, etc. in paper manufacturing, which includes a process of manufacturing paper using recycled paper raw materials, it is possible to more effectively treat macro-stickiness in the slurry or dehydrated cake in paper manufacturing. In this embodiment, it is preferable that the macro-sticky-containing object is rejects generated in the screen or cleaner of the raw material process or papermaking process in paper manufacturing. This embodiment makes it possible to more effectively treat the macro-sticky in the rejects, and thus to reuse the rejects in which the macro-sticky is concentrated as raw material. In this case, taking into consideration the treatment efficiency, the amount of macro-sticky to be treated is 5000 mm 2 / kg or more is preferable.

[0098] In the paper manufacturing process of this embodiment, the order or location of the dust removal process including the screening process and / or cleaner process is not particularly limited, and one or more processes may be provided and implemented within the paper manufacturing process, or may be provided as appropriate within the preparation process and / or papermaking process, and may be provided as appropriate after, before, or between processes to remove dust, pitch, etc. contained in the target. Furthermore, since rejects (or targets including rejects) after screening or cleaning contain macrostickiness, processing the rejects (or targets including rejects) according to this embodiment makes it possible to more effectively process the macrostickiness contained in the target.

[0099] In this embodiment, the amount of macro-sticky in the macro-sticky-containing object is not particularly limited, but from the viewpoint of processing efficiency, a preferable lower limit is 100 mm 2 / kg or more, more preferably 1000mm 2 / kg or more, more preferably 2000mm 2 / kg or more, more preferably 3000mm 2 / kg or more, more preferably 5000mm 2 / kg or more is preferable, and the preferable upper limit is not particularly limited by adjusting the amount of the agent added according to the macrosticky content in the target, but for example, 100,000 mm 2 / kg or less, 50000mm 2 / kg or less or 10,000mm 2 / kg or less.

[0100] [Macro sticky amount (mm 2 / kg) measurement method The macro-sticky content (mm 2 / kg), Macro Sticky 1mm 2 can be measured according to JIS P8231:2005.

[0101] In this embodiment, the amount of the macro-sticky treating agent to be added to prevent macro-stickiness is not particularly limited, but a preferable lower limit of the amount is 0.0001 mg / mm 2 More preferably, 0.0005 mg / mm 2 More preferably, 0.001 mg / mm 2 More preferably, 0.005 mg / mm 2 The preferable upper limit is not particularly limited, and can be adjusted by increasing the amount of the drug added according to the macrosticky content in the target. For example, the upper limit is 0.5 mg / mm 2 or less, or 0.1 mg / mm 2 The following may be mentioned, but from the viewpoint of drug cost, etc., the preferred anti-macrotonic agent is 0.05 mg / mm 2 Less than or equal to 0.01 mg / mm 2 The following is the result.

[0102] In this embodiment, the concentration of the compound used in the present invention is not particularly limited, but a suitable lower limit is preferably 5 mg / L or more, more preferably 10 mg or more, even more preferably 20 mg / L or more, even more preferably 30 mg / L or more, more preferably 50 mg / L or more, more preferably 100 mg / L or more, more preferably 200 mg / L or more, and more preferably 300 mg / L or more. The suitable upper limit is not particularly limited, but from the viewpoint of chemical costs, it is preferably 5000 mg / L or less, more preferably 4000 mg / L or less, and even more preferably 3000 mg / L or less. When the target is macrosticky-containing process water, the concentration of the compound used is "mg of the compound used in the present invention / L of process water."

[0103] Furthermore, in this embodiment, when the cationic compound for cation conversion is used as a macrosticky treatment agent, it is preferable to use (e.g., add) the cationic compound for cation conversion to a macrosticky-containing object in an amount greater than or equal to that required to convert the object to a positive state. By converting the object to a positive state in this embodiment, the cationic compound for cation conversion can react more effectively with the macrosticky contained in the object and treat the macrosticky. This embodiment has the advantage that the cationic compound that reacted with the macrosticky after the object is converted to a positive state does not separate from the macrosticky again. Therefore, this embodiment has the advantage that the reduced adhesiveness of the macrosticky that has reacted with the cationic compound for cation conversion is maintained even if the object after conversion is further mixed with an anionic compound and / or another slurry.

[0104] In addition, in this embodiment, it is preferable that the method includes using (adding, etc.) the cationic compound for positive conversion to a macro-sticky-containing object in an amount greater than or equal to the amount that will cause the object to become positive, and then using (adding, etc.) an anionic compound and / or another slurry (pulp-containing water) to the object until the positive conversion is resolved.

[0105] In this embodiment, the evaluation (determination) of whether or not a compound can be used as a macro-sticky treatment agent is preferably carried out using the method for evaluating the macro-sticky treatment in the Examples below, which examines the anti-adhesive effect on adhesive tape based on the relationship between peel strength (N) and the amount added (mg / L). For example, the peel strength of the adhesive tape may decrease as the amount of agent used (added, etc.) increases. More specifically, examples of such cases include a difference of 0.5 or 1 or more between the peel strength (N) of an additive-free compound and that of an additive amount of 3000 mg / L; a large negative slope; etc.

[0106] To evaluate (determine) whether a compound is a cationic compound for positive conversion, it is preferable to use the "macrosticky treatment evaluation method (presence or absence of positive conversion)" described in the Examples below. When the amount of agent in a sample is gradually increased, changes in one or more values ​​selected from peel strength (N), cation demand (μeq / L), and zeta potential (mV) are preferably determined to be "cationic compounds for positive conversion." For example, when peel strength (N) is used, examples include those in which the peel strength (N) is reduced to less than 0.2 or 0.4 when compared between the unadded and added state; and those in which the cation demand changes from positive to negative and / or the zeta potential changes from negative to positive between 0 and 300 mg / L when the amount of agent added is up to 300 mg / L. It is preferable to use at least the cation demand or the zeta potential as an indicator, and more preferably both.

[0107] In this embodiment, it is preferable to use (add, etc.) the compound used in the present invention for the macrosticky-containing object in an amount greater than or equal to that which converts the macrosticky-containing object to a positive state. Furthermore, in this embodiment, an anionic compound and / or another slurry (object) can be further used (added, etc.) to the macrosticky-containing object after the positive conversion treatment to eliminate the positive conversion. This has the advantage that the reaction state between the macrosticky and the cationic compound can be maintained (specifically, the reduced adhesiveness of the macrosticky can be maintained) even after the positive conversion is eliminated. In this embodiment, the measurement or monitoring of the positive conversion is preferably carried out by analyzing or measuring the cation demand and / or zeta potential, and the analysis or measurement is preferably carried out using an apparatus, method, process, etc. that can measure the cation demand and / or zeta potential. The apparatus, method, process, etc. are not particularly limited, and examples thereof include commercially available measuring apparatuses and measurement kits, and known analytical methods.

[0108] As described above in "2.", the macro-sticky-containing target to be treated in this embodiment includes pitch-containing water containing macro-sticky particles in the papermaking process. The pitch-containing water or macro-sticky-containing water may be pulp-containing water containing pulp, and the pulp may be virgin pulp, recycled paper pulp, or a mixture thereof, with the pulp concentration being, for example, about 0.5 to 5%. In addition, the target of treatment in this embodiment, which contains macrosticky particles in the papermaking process, is preferably process water present in one or more processes selected from the preparation process, the papermaking process, and the water recovery process. In addition, the target of treatment in this embodiment is preferably a component or target containing a large amount of macrosticky particles, for example, a reject or target after at least a screening process or a cleaning process.

[0109] The properties of the macro-sticky-containing object to be treated are described below, but they may be diluted (e.g., diluted with water) and / or concentrated (e.g., by heat, membrane, or reduced pressure) to fall within a suitable numerical range, and the dilution or concentration may be carried out in an apparatus configured to dilute and / or concentrate the macro-sticky-containing object.

[0110] The size (particle diameter) of the macro-sticky particles to be treated is not particularly limited, but a suitable lower limit is preferably 100 μm or more or 150 μm or more, and a suitable upper limit is preferably 10,000 μm or less, more preferably 5,000 μm or less, even more preferably 2,000 μm or less, even more preferably 1,000 μm or less, more preferably 500 μm or less, and a more suitable numerical range is more preferably 150 μm or more and 500 μm or less.

[0111] In this embodiment, the size (particle diameter) of the macrosticky particles to be processed can be defined as a size that does not pass through a device equipped with a screen plate having a slit gap of 100 μm or 150 μm, in accordance with JIS P8231:2005. The size of the macrosticky particles contained in the processing target can be confirmed by changing the mesh size of the screen plate. For example, particles separated using a slit screen plate with a mesh size of 150 μm can be considered to be macrosticky particles with a particle diameter of 150 μm or more. For example, particles separated by passing through a slit screen with a mesh size of 1000 μm and then preventing passage through a slit screen with a mesh size of 100 μm can be considered to be macrosticky particles with a particle diameter of 1000 μm or less but 100 μm or more.

[0112] The cation demand (μeq / L) of the macrosticky-containing target to be treated is not particularly limited, but is preferably a positive value, more preferably about +5 to +5000 μeq / L, even more preferably +10 to +1000 μeq / L, and even more preferably +50 to +200 μeq / L. The zeta potential (mV) of the macrosticky-containing object to be treated is not particularly limited, but is preferably a negative value, more preferably about 0 to -200 mV, even more preferably -5 to -100 mV, and even more preferably -10 to -50 mV.

[0113] The target pH during treatment is not particularly limited, but is preferably pH 5-13, more preferably pH 5-10.

[0114] The temperature of the object to be treated and / or the temperature of the agent to be treated are not particularly limited, but a suitable lower limit is preferably 5° C. or higher, more preferably 10° C. or higher, and even more preferably 20° C. or higher, and a suitable upper limit is preferably 60° C. or lower, more preferably 50° C. or lower, and even more preferably 40° C. or lower, with a suitable range being, for example, 10 to 50° C. For example, it is preferable to further provide a heating / cooling device or a heating / cooling step in the location where the agent is added (tank, piping, etc.) to adjust the temperature of the object to be treated and / or the agent.

[0115] 3-1. Overview of the papermaking process The papermaking process using the method of this embodiment is not particularly limited, and the method of this embodiment can be applied to known papermaking processes or papermaking processes that may arise in the future. The papermaking process preferably includes a preparation process, a papermaking process, and a water recovery process. FIG. 1 is shown as an example, but the process of this embodiment is not limited to this. In this embodiment, for example, "to (do)," such as "cleaning papermaking tools," may be expressed as a "process" or a "step," and a "step" may be expressed as "to (do)" or a "process," or a "process" may be expressed as "to (do)" or a step. In addition, in this embodiment, a "process" and a "mechanism" may be expressed as a system, an apparatus, or a part, an "apparatus" may be expressed as a system, a mechanism, or a part, and a "part" may be expressed as a part or apparatus provided in a mechanism, apparatus, system, or the like.

[0116] The method of this embodiment is suitable for treating a processing object containing pitch in a papermaking process, and since it can treat macrosticky among pitches, it is suitable for use in a processing object containing macrosticky. Furthermore, the method of this embodiment is suitable for treating a processing object containing one or more types of macrosticky selected from a preparation process (preparation mechanism), a papermaking process (papermaking mechanism), and a water recovery process (water recovery mechanism).

[0117] The target of treatment may be one or more selected from various process waters in the papermaking process. Pulp-containing water usually contains pitch such as macrosticky particles, so it is preferable to treat the pulp-containing water. Pulp-containing water used as a pulp raw material in the papermaking process is generally said to have a pulp concentration of about 0.5 to 5%.

[0118] The preparation step may be a general preparation step, for example, configured to prepare papermaking raw materials by adjusting and blending raw materials (such as pulp) used in papermaking. The papermaking step may be a general papermaking step, or configured to papermaking raw materials using a papermaking machine. The water recovery step may be a general water recovery step, for example, configured to recover, circulate, or discharge water generated in the preparation step and / or papermaking step, and is preferably a step of recovering water generated in the papermaking step.

[0119] The preparation step, papermaking step, and water recovery step in this embodiment will be described in detail below (see, for example, FIG. 1), but the steps in this embodiment are not limited to these.

[0120] 3-1-1. Preparation process The preparation step is not particularly limited and may be a conventional preparation step, for example, a step for preparing chemical pulp, mechanical pulp, or recycled paper pulp. In the preparation step in the method of this embodiment, a preparation step using recycled paper as a raw material is preferred.

[0121] Examples of the preparation process include a dissolving process using a pulper device or the like, a defibrating process using a kneader device or the like, a dust removal process using a cleaner device and / or a screen device or the like, a washing and / or concentration process using a thickener device or the like, a beating process using a refiner device or the like, and combinations of these.

[0122] The cleaner process in this embodiment is a process configured to separate large foreign objects, such as gravel and staples, mixed in the raw material using a separator such as a cleaner. In this embodiment, it is preferable to process the rejects or objects containing the rejects after the cleaner process, thereby more effectively processing macro-stickiness contained in the rejects or objects containing the rejects.

[0123] The screening process in this embodiment is a process configured to remove foreign particles that cannot pass through slits provided in the screening device. Examples of screening methods include, but are not limited to, slit screen and hole screen methods. For example, in the case of a slit screen having a predetermined slit width (e.g., 150 μm, 300 μm, 400 μm, or 500 μm), when a pitch-containing object is passed through the slit screen having the predetermined slit width, foreign particles larger than the predetermined size (e.g., 150 μm, 300 μm, 400 μm, or 500 μm) contained in the pitch-containing object cannot pass through the slit width and are removed as rejected particles. In this embodiment, it is preferable to process the rejected particles or objects containing the rejected particles after the screening process to more effectively remove macrostickiness contained in the rejected particles or objects containing the rejected particles.

[0124] In the method of the present embodiment, the dust removal step preferably includes a cleaning step followed by a screening step. In a more preferred embodiment, the pitch-containing object is a pitch-containing object after screening, or is one or more pitch-containing objects selected from a preparation step, a papermaking step, and a water recovery step in which a pitch-containing object after screening is reused, and the pitch-containing object preferably contains macro-sticky particles.

[0125] The preparation process is preferably carried out in the order of a maceration process, a dust removal process, a concentration process, and a beating process. Alternatively, a dissolution process for dissolving the raw materials and a dust removal process may be added before these processes, so that the dissolution process, dust removal process, maceration process, dust removal process, concentration process, and beating process are carried out in this order.

[0126] In the method of the present embodiment, it is preferable to treat pitch-containing water such as rejects discharged from the screening step in the dust removal step in the preparation step.

[0127] The method of this embodiment can process even macro-sticky particles that are large enough to slip through a dust removal device such as a screen.

[0128] The preparation system or preparation device that performs the preparation step may be any system or device that is configured to produce papermaking raw materials, and a general preparation system or preparation device may be used.

[0129] 3-1-2. Paper making process The papermaking process is not particularly limited and may be a normal papermaking process. The papermaking process includes a paper layer forming process in the wire part, in which prepared papermaking raw materials (selected paper stock) are poured onto a screen and filtered to form a paper layer, a wet paper dewatering process in the press part, in which the obtained wet paper is passed between two rolls together with a blanket (felt) to squeeze and dewater it, and a primary water circulation process in which water (especially pulp-containing water) generated from these processes is collected in a storage section and a flow path (silo, pit, piping, etc.) and circulated to a seed box or chest, etc. The water in this papermaking process contains pitch in addition to pulp. The papermaking process may also include a wet paper drying process in which the wet paper is dried in the dryer part after the wet paper dewatering process. In the method of this embodiment, it is preferable to treat pitch-containing targets in one or more papermaking processes selected from the paper layer forming process, the wet paper dewatering process, and the primary circulating water process.

[0130] In the method of this embodiment, since the water generated in the papermaking process and / or the recovered water contains pitch such as macro-sticky particles, this pitch-containing water can be treated as a pitch-containing target. In a more preferred embodiment, for example, approach raw material obtained by diluting raw material from a seed box with white water, rejects discharged from approach raw material from dust removal devices such as cleaners and screens, seal pits, white water silos, and recovered water tanks may be used, and one or more pitch-containing targets selected from these may be treated.

[0131] The papermaking system or apparatus for carrying out the papermaking process may be configured to be capable of making paper, and a general papermaking system or apparatus may be used. The papermaking system or papermaking equipment includes, for example, a wire part, a press part, and a dryer part, but is not limited to these, and may further include one or more selected from dust removal devices such as screens, chests (e.g., mixing chests, machine chests, etc.), refiners, seed boxes and inlets, white water silos, seal pits, recovered water tanks, white water recovered water flow paths, etc.

[0132] 3-1-3. Water recovery process The water recovery process is not particularly limited, and is usually configured to recover and circulate water (e.g., shower water, wash water, excess water, white water, filtrate, etc.) generated from each step of the papermaking process (more preferably the preparation step and / or papermaking step) for reuse in the preparation step and / or papermaking step. The water recovery process is equipped with one or more devices selected from, for example, a dust removal device such as a screen, a pressurized flotation device, a polydisc filter, a water reservoir, a chest, piping or flow paths, a pump, etc., and these are preferably connected in a network so that water can be recovered, circulated, or treated according to the purpose. In the method of the present embodiment, the water recovered, circulated, and reused in the water recovery step contains pitch, and therefore it is preferable to treat the pitch-containing water in the water recovery step as a pitch-containing target.

[0133] In this embodiment, the water recovery process preferably includes a primary circulating water process and a secondary circulating water process. Typically, the water circulation within the papermaking process is referred to as the primary circulation, and the water circulation generated in the papermaking process and transported outside the process for circulation is referred to as the secondary circulation. For example, the primary circulating water process preferably recovers water generated in the papermaking process and circulates the recovered water in the papermaking process for reuse. For example, the secondary circulating water process preferably recovers water generated in the papermaking process and transports the recovered water to the preparation process for reuse or discharges it outside the system.

[0134] The water recovery system or water recovery device that performs the water recovery process is configured to recover water generated from each process, transport water to the desired equipment, and circulate water. For example, it may include a water storage section, chests, piping and flow paths, pumps, dust removal devices such as screens, etc., and may be configured to be connected in a network depending on the purpose.

[0135] The paper manufacturing mechanism in this embodiment preferably includes one or more mechanisms selected from a preparation mechanism, a papermaking mechanism, and a water recovery mechanism. The mechanism may be a device. Furthermore, this embodiment preferably includes a chemical addition mechanism configured to add the chemical of this embodiment. Furthermore, this embodiment preferably includes a macrosticky measurement mechanism for measuring or monitoring the macrosticky content or state in a target. The papermaking mechanism in this embodiment preferably includes (a) one or more selected from a preparation mechanism, a papermaking mechanism, and a water recovery mechanism, and (b) a chemical application mechanism that uses the chemical of this embodiment in at least one of the preparation mechanism, papermaking mechanism, or water recovery mechanism, and more preferably further includes the chemical application mechanism and a macrosticky measurement mechanism. Examples of the chemical application mechanism include a chemical addition device that adds chemicals to pipes through which the target flows and tanks for storing the target. The chemical of this embodiment is preferably added to targets that are prone to high macrosticky concentrations after screening or cleaning treatment, or to circulating water downstream of the targets, after screening or cleaning treatment, that is used in the preparation process or papermaking process.

[0136] A control mechanism including a control unit provided in this embodiment instructs the drug addition mechanism to add the drug of this embodiment to a macrosticky-containing target. More preferably, the control mechanism instructs the macrosticky measurement mechanism to monitor the content or state of macrosticky in the target. The control mechanism instructs the adjustment of the drug administration (e.g., dosage) of this embodiment based on the macrosticky measurement results. For example, the control mechanism can increase the dosage of the drug of this embodiment when the macrosticky concentration is higher than a predetermined measurement value or the result of a previous measurement, and / or decrease the dosage of the drug of this embodiment when the macrosticky concentration is lower than the predetermined measurement value or the result of a previous measurement. The dosage of the drug can include the concentration and / or duration of use, and the drug administration can also include physical use, such as stirring speed, flow rate, and injection pressure, in addition to the dosage of the drug. The control mechanism can perform such increase / decrease adjustments to perform feedback control.

[0137] In describing an example of a macro-sticky treatment method in this embodiment, explanations of the components and treatment methods of the chemicals, target, paper manufacturing, preparation process, papermaking process, and control used in the present invention that overlap with the above explanation, for example, "1.", will be omitted as appropriate, but the above explanations, such as "1.", also apply to this embodiment and can be adopted as appropriate. Furthermore, in describing an example of a macro-sticky treatment method in this embodiment, the explanations that will be described later can also be applied to this embodiment and can be adopted as appropriate.

[0138] The macro sticky processing management system according to this embodiment preferably includes a macro sticky processing management device that includes at least the control unit described above. The macro sticky processing management system according to this embodiment may further include a communication unit that enables wireless and / or wired transmission and reception between the control unit or the macro sticky processing management device that includes the control unit and another unit or another device.

[0139] The method according to this embodiment can also be realized by a device or control unit including a CPU in a device for managing the macro-sticky processing status (e.g., a computer, PLC, server, cloud service, etc.). The method according to this embodiment can also be stored as a program in hardware resources including a recording medium (non-volatile memory (e.g., USB memory, SSD (Solid State Drive)), HDD, CD, DVD, Blu-ray Disc (BD), etc.) and realized by a control unit. It is also possible to provide a device including the control unit or the system, such as a macro-sticky processing status management system that controls the control unit to add a predetermined amount of drug to the coarse macro-sticky. The management device may also include an input unit such as a keyboard, a communication unit such as a network, a display unit such as a display, etc.

[0140] A device for managing the macro-sticky processing status or a macro-sticky processing management system can include an input unit such as a keyboard, a communication unit such as a network, an output unit such as a display, a storage unit such as a HDD, the measurement unit and chemical addition unit described above, etc. The device or system preferably includes an input unit, an output unit, and a storage unit, and further preferably includes a chemical addition unit, and preferably includes a communication unit and / or a measurement unit. The input unit can accept user operations by an operator performing the method of the present embodiment. The input unit can include, for example, a mouse and / or a keyboard. Alternatively, the display surface of the display device may be configured as an input unit that accepts touch operations. The output unit may output the macro sticky processing status and related information (e.g., tables, diagrams, explanatory text, etc.) Examples of the output unit include, but are not limited to, a display device for displaying images, a speaker for outputting sounds, and a printer for printing on a print medium such as paper. The storage unit can store data input by an operator and data set for viewing the macro sticky processing status. The storage unit may include, for example, a recording medium. Furthermore, the macro sticky processing management system according to this embodiment can be implemented by utilizing a program and hardware. An embodiment (not shown) of a computer 1 according to one embodiment of the present invention includes, but is not limited to, at least a CPU as components of the computer 1, and may further include one or two components selected from a RAM, a storage unit, an output unit, an input unit, a communication unit, a ROM, and a measurement unit. Of these, it is preferable that the computer includes a RAM, a storage unit, an output unit, and an input unit, and it is also preferable that the computer includes at least one of a communication unit, a measurement unit, a ROM, etc. It is preferable that the respective components are connected by, for example, a bus as a data transmission path.

[0141] 4. This technology may employ the following configurations, technical features, or other aspects: [1] A macro-sticky treatment agent containing one or more compounds selected from the group consisting of an oily compound having a melting point of 50°C or less, a polyvinyl alcohol having a cationic group, and a cationic compound used for positive conversion. [2] The macro-sticky treatment agent according to [1], wherein the oily compound has a hydrophilic group and has a solubility in water of 0.1% or less. [3] The macro-sticky treatment agent according to [1] or [2], wherein the oily compound is a polyalkylene oxide compound and / or a glycerin ester compound. [4] The macro-sticky treatment agent according to [1], wherein the cationic compound is a cationic polymer used in an amount equal to or greater than that which converts the macro-sticky-containing object to positive. [5] The macro-sticky treatment agent according to any one of [1] to [4], which is intended for use on rejects generated in a screen or cleaner in a stock process or papermaking process in paper manufacturing. [6] The macro-sticky treatment agent according to any one of [1] to [5], which is intended to be used for a slurry in a process for producing paper using recycled paper raw materials. [7] A macro-sticky treatment method in which a macro-sticky treatment agent containing one or more compounds selected from an oily compound having a melting point of 50°C or less, a polyvinyl alcohol having a cationic group, and a cationic compound used for positive conversion is used on a macro-sticky-containing object. [8] The method for treating macrosticky particles according to [7], wherein the cationic compound is used in an amount equal to or greater than that which converts the macrosticky-containing object to positive. [9] The method for treating macrosticky particles according to [7] or [8], which comprises using the cationic compound on a macrosticky-containing object in an amount equal to or greater than that which causes the object to become positive, and then using an anionic compound and / or another slurry until the positive conversion is eliminated.

[10] The macro-sticky treatment method according to any one of [7] to [9], wherein the oily compound has a hydrophilic group and a solubility in water of 0.1% or less.

[11] The macro-sticky treatment method according to any one of [7] to

[10] , wherein the oily compound is a polyalkylene oxide compound and / or a glycerin ester compound.

[12] The method for treating macrosticky particles according to any one of [7] to

[11] , wherein the macrosticky-containing object is a reject generated in a screen or cleaner in a raw material process or a papermaking process in paper manufacturing.

[13] The method for treating macrosticky particles according to any one of [7] to

[12] , wherein the macrosticky-containing object is a slurry produced in a process for producing paper using waste paper raw materials.

[14] The amount of macro-sticky in the macro-sticky-containing object is 5000mm 2 The method for treating macro-sticky objects according to any one of [7] to

[13] above, wherein the amount of the macro-sticky object is 1 / kg or more.

[15] The amount of the macro-sticky treatment agent used is 0.001 mg / mm 2 The macro-sticky treatment method according to any one of [7] to

[14] above.

[16] A macro-sticky treatment method using one or more compounds selected from an oily compound having a melting point of 50°C or less, a polyvinyl alcohol having a cationic group, and a cationic compound used for positive conversion, or using an agent such as the macro-sticky treatment agent described in any one of [1] to [6] above.

[17] A compound for macro-sticky treatment or for use in macro-sticky treatment, the compound being an oily compound having a melting point of 50°C or less, a polyvinyl alcohol having a cationic group, a cationic compound used for positive conversion, or one or more compounds selected from these.

[18] A compound used in the manufacture of a drug such as a macro-sticky treatment agent, or a compound for use in the manufacture of such a drug, wherein the compound is an oily compound having a melting point of 50°C or less, a polyvinyl alcohol having a cationic group, a cationic compound used for positive conversion, or one or more selected from these. [Example]

[0142] The following examples and comparative examples will be used to explain the embodiments of the present invention, but the scope of the present invention is not limited to these examples.

[0143] <Test Example 1> Because there is very little macro-stickiness in the slurry of the actual machine, it is difficult to evaluate macro-stickiness treatment agents using the actual machine slurry. We compared the degree of adhesive strength loss in the white water of the actual machine with adhesive tape, which is the main source of macro-stickiness in recycled paper raw materials. The adhesive tape used for evaluation was an acrylate-based adhesive, which is the main component of macro-stickiness.

[0144] [Method for evaluating macro-sticky processing] A Diatex masking tape (Piolan Cross adhesive tape Y-09-GR, 25 mm wide) is fixed to a glass plate measuring 25 mm in length, 75 mm in width, and 1 mm thick, with the adhesive side facing outwards, and the glass plate with the adhesive tape fixed thereto is placed upright in a 200 mL beaker. A 200 mL beaker containing the adhesive tape-mounted glass plate was placed against the beaker. White water from a cardboard manufacturing plant (SS concentration 0.15%, pH 7.0) was placed in the beaker. The white water (water temperature 20°C, pH 7.0, pulp content 0.15%) was stirred with a magnetic stirrer for 10 minutes, bringing the white water into contact with the adhesive surface of the adhesive tape (tip length 25 mm, rotation speed 1000 rpm). While stirring, the chemicals (each test agent A-N) were added to the beaker. The stirring was continued, bringing the chemical-containing white water into contact with the adhesive surface of the adhesive tape. After 30 minutes, the glass plate with the adhesive tape attached was removed from the chemical-containing white water in the beaker, and the adhesive tape attached to the glass plate was lightly washed with tap water. After cleaning, the adhesive tape was removed from the glass plate, and the adhesive surface of the tape was attached to a SUS plate (diameter 100 mm). This SUS plate was sandwiched between two sheets of absorbent filter paper (NO26, diameter 185 mm) made by Toyo Roshi Co., Ltd., and subjected to 3.5 kgf / cm 2 The adhesive tape was pressed for 1 minute at 100°C. After pressing, the filter paper was removed, and the SUS plate with the adhesive tape attached was placed on a table. After drying at room temperature (20-30°C) for half a day (12 to 14 hours), the peel strength was measured when the adhesive tape was peeled off from the SUS plate (measuring device: STROGRAPH ES, manufactured by Toyo Seiki Seisakusho, peeling speed: 100 mm / min). The compositions of the evaluated agents are shown in Table 1.

[0145] The properties of the white water from the stock process were pulp content 0.15% and pH 7.0.

[0146] Drugs A to N The average molecular weight of each drug was measured as follows. Drugs A, I, and J: GPC analysis, standard substance polyethylene glycol (weight average molecular weight) Drugs C, H, M: GPC analysis, standard substance polystyrene (weight average molecular weight) Drug E: Calculated from intrinsic viscosity (estimated average molecular weight based on the relationship between intrinsic viscosity and average molecular weight) Drug K, N: GPC analysis, standard substance sodium polyacrylate (weight average molecular weight) The saponification degree, average polymerization degree, colloid equivalent, etc. of the drug were measured using the various measurement methods described above ([Method for measuring saponification degree], [Method for measuring average polymerization degree], [Method for measuring colloid equivalent value of cation], [Method for measuring intrinsic viscosity], [Method for calculating estimated average molecular weight of water-soluble cationic polymer compound], etc.).

[0147] Table 2 shows the test results (Examples 1-1 to 1-5, Comparative Examples 1-1 to 1-8). Tests with polypropylene glycol (agent A), triglyceride (agent B), liquid paraffin (agent C), cationized PVA (saponified copolymer of vinyl acetate and diallyldimethylammonium chloride: agent D), and polyDADMAC (agent E) showed a decrease in peel strength, indicating that polypropylene glycol (agent A), triglyceride (agent B), liquid paraffin (agent C), cationized PVA (agent D), and polyDADMAC (agent E) reduced the adhesiveness of acrylate adhesive tape in white water under actual conditions. On the other hand, tests with common internal pitch control agents, highly basic aluminum chloride (agent F), bentonite (agent G), phenolic resin alkaline solution (agent H), and PVA (agent L), showed no decrease in peel strength. In the tests of Agents A, B, and C, polyoxyalkylene lauryl ether (Agent I) was added at a weight ratio of 2% to Agents A to C to promote their dispersion in white water, but in the tests of Agent I, Agent I itself did not have the effect of reducing peel strength.

[0148] Both Agent A and Agent H are polypropylene glycol compounds, but Agent A reduced peel strength, while Agent H did not. Agent A has a solubility in water of less than 1 mg / L, while Agent H, which has a lower molecular weight than Agent A, has a solubility in water of over 10,000 mg / L. At the evaluated dosages of 30 to 3,000 mg / L, Agent A did not dissolve in water and remained oily, while Agent H dissolved in water. For the agents to be effective, they needed to be insoluble at the dosage concentration and dispersed in water.

[0149] Both Agent C and Agent M are hydrocarbon paraffins, but Agent C reduced the peel strength, while Agent M did not. Agent C is a liquid, while Agent M, which has a higher molecular weight than Agent C, is a solid. For the agents to be effective, they needed to be dispersed in water as a liquid oil at the temperature of use (water temperature).

[0150] Agents A, B, and C are all liquid oils that do not dissolve in water at the evaluated concentrations, but Agent C reduced peel strength to a lesser extent than Agents A and B. Agents A and B have hydrophilic sites within their molecules (hydroxyl groups in Agent A, and acyl groups in Agent B). Oils with hydrophilic sites were more effective than oils that only have hydrophobic sites, such as hydrocarbons.

[0151] Agents D and E are soluble in water, but the peel strength decreased. Both are cationic polymers. Agents D and L are both PVA-based, but Agent L, which is not cationized, did not decrease the peel strength. Agent K, an anionic polymer, also did not decrease the peel strength. For agents to be soluble in water, it was necessary for them to have a cationic group.

[0152] Table 3 shows the peel strength and the test solution's positive conversion status in the low addition amount range of Chemical E (Comparative Examples 2-1 to 2-5, Examples 2-1 to 2-6). In Table 3, a circle in the "positive conversion" column indicates a positive conversion. The positive conversion status was determined from the cationic demand measured using a PCD03pH (Particle Charge Detector) manufactured by Mutek and the zeta potential measured using a LAZER ZEE METER MODEL 501 (zeta potential measuring device) manufactured by PEN KEM after leaving the test solution to stand for 2 minutes. When 25 mg / L or more of Chemical E was added, a decrease in peel strength was observed. Similarly, when 25 mg / L or more of Chemical E was added, the test solution turned positive. To obtain the effect of the cationic chemical, it was necessary to add until the solution turned positive.

[0153] Table 4 shows the peel strength of Agent D and the positive conversion status of the test solution (Comparative Example 3-1, Examples 3-1 to 3-3). Agent D is also a cationic agent, but a decrease in peel strength was observed at an amount that did not cause a positive conversion.

[0154] Table 5 shows the persistence of the anti-tack effect when treated with a cationic chemical (Examples 4-1 to 4-2, Comparative Example 4-1). In Example 1, in which the test water of an adhesive tape treated with Chemical E was replaced with test water containing no chemical, a certain amount of the peel strength-reducing effect remained. In Example 2, in which Chemical N, an anionic chemical, was added to the test water of an adhesive tape treated with Chemical E to eliminate the positive change, a certain amount of the peel strength-reducing effect remained. In the Comparative Example, in which Chemical N was added before Chemical E, almost no reduction in peel strength was observed because Chemical E reacted with Chemical N and was consumed before it could react with the adhesive tape.

[0155] Based on this, the present inventors have discovered that the stickiness of macrostickiness and the stickiness resulting from undisintegrated stickiness that causes macrostickiness can be reduced by using, as a macrosticky treatment agent, one or more selected from an oily compound having a melting point of 50°C or less, polyvinyl alcohol having a cationic group, and a cationic compound used for positive conversion. This technology can prevent adhesion to the papermaking machine and the coarsening of macrostickiness caused by adhesion between macrostickiness or by adhesion of undisintegrated stickiness that causes macrostickiness.

[0156] The present inventors have also discovered that adding the cationic compound to an object containing macrostickiness or undisintegrated matter of the adhesive that causes macrostickiness in an amount greater than or equal to the amount that causes the macrostickiness-containing object to turn positive can reduce the stickiness of the macrostickiness and the stickiness resulting from the undisintegrated matter that causes macrostickiness. Furthermore, they have discovered that the effect of reducing the stickiness of the macrostickiness or the undisintegrated matter that causes macrostickiness can be maintained to a certain extent even if an anionic compound and / or another slurry is subsequently added until the positive conversion is resolved, and it is believed that the stickiness-reducing effect can be maintained to a certain extent even in processes after the positive conversion. This technology can prevent adhesion to the papermaking machine and the coarsening of macrostickiness due to adhesion between macrostickies or the undisintegrated matter that causes macrostickiness.

[0157] Furthermore, based on the above results, we believe that this technology is also extremely useful for slurry produced in the process of producing paper from recycled paper raw materials, where macro-stickiness or the undisintegrated sticky material that causes macro-stickiness is present in the target material, and for rejects produced in the screens or cleaners in the stock process or papermaking process in paper production.

[0158] The key point of this technology is that it targets macro-stickiness. Based on experience, if the amount of macro-stickiness in the rejects used for impurity removal or in raw materials (process water) that contain a large amount of sticky matter is 5000mm 2 / kg or more, defects and tool stains due to macro-stickiness tend to occur easily, and it is economically rational to perform macro-stickiness treatment only on raw materials (process water) with a large amount of macro-stickiness. With this technology, by increasing the amount of macro-stickiness treatment agent added according to the amount of macro-stickiness, macro-stickiness treatment can be performed even on such process water. The estimated amount of agent to be added per amount of macro-stickiness is 30 mg / L minimum agent addition, 200,000 mg / L maximum target concentration (= 0.2 kg / L), and maximum amount of macro-stickiness of 150,000 mm 2 / kg, the minimum amount of drug added per macrosticky amount is 30 / 0.2 / 150000 = 0.001 mg / mm 2 This technology can be calculated as follows, taking into consideration the processing efficiency, etc., the amount of macro-stickiness in the target. 2 / kg or more is considered to be preferable. The preferred amount of macro-sticky treatment agent in this technology is 2 For example, the drug loading is 0.001 mg or more, i.e., 0.001 mg / 1 mm against macrosticky. 2 It is considered that the preferable content of macro-sticky particles is more than 100%. 2 / kg, Macro Sticky 1mm 2 can be measured according to JIS P8231:2005.

[0159] [Table 1]

[0160] [Table 2]

[0161] [Table 3]

[0162] [Table 4]

[0163] [Table 5] [Explanation of symbols]

[0164] 1: Papermaking process, 10: Raw material, 2: Preparation process, 21: Dissolving process, 22: Dissociation process, 23: Dust removal process (cleaner process, screen process), 24: Concentration process, 25: Beating process, 3: Papermaking process, 31: Dust removal process, 32: Paper layer formation process, 33: Wet paper dewatering process, 34: Wet paper drying process, 4: Water recovery process, 41: Primary circulating water process, 42: Secondary circulating water process, 43: White water, 5: Paper, 6: Wastewater, 100: Treatment process, mechanism or device for a macro-sticky-containing target of this embodiment

Claims

1. A macro-sticky treatment agent comprising one or more compounds selected from the group consisting of an oily compound having a melting point of 50° C. or less, a polyvinyl alcohol having a cationic group, and a cationic compound used for positive conversion.

2. 2. The macro-sticky treatment agent according to claim 1, wherein the oily compound has a hydrophilic group and a solubility in water of 0.1% or less.

3. 2. The agent for treating macro-stickiness according to claim 1, wherein the oily compound is a polyalkylene oxide compound or a glycerin ester compound.

4. 2. The agent for treating macro-stickiness according to claim 1, wherein the cationic compound is a cationic polymer used in an amount sufficient to convert a macro-sticky-containing object into a positive state or more.

5. 3. The macro-sticky treating agent according to claim 1 or 2, which is for use on rejects generated in a screen or cleaner in a stock process or papermaking process in paper manufacturing.

6. 3. The macro-sticky treating agent according to claim 1 or 2, which is for use on a slurry in a process for producing paper using recycled paper raw materials.

7. A method for treating macro-stickiness, comprising applying to an object containing macro-stickiness a macro-sticky treating agent containing one or more selected from an oily compound having a melting point of 50°C or less, polyvinyl alcohol having a cationic group, and a cationic compound used for positive conversion.

8. 8. The method for treating macro-sticky particles according to claim 7, wherein the cationic compound is used in an amount sufficient to convert the macro-sticky-containing object to a positive state or more.

9. The method for treating macro-sticky particles according to claim 7 or 8, comprising using the cationic compound on a target containing macro-sticky particles in an amount equal to or greater than the amount that causes a positive conversion, and then using an anionic compound and / or another slurry until the positive conversion is eliminated.

10. 8. The method for treating macro-sticky particles according to claim 7, wherein the oily compound has a hydrophilic group and a solubility in water of 0.1% or less.

11. 11. The method for treating macro-sticky particles according to claim 7 or 10, wherein the oily compound is a polyalkylene oxide compound or a glycerin ester compound.

12. 9. The method for treating macro-sticky particles according to claim 7 or 8, wherein the macro-sticky particles are rejects generated in a screen or cleaner in a raw material process or a papermaking process in paper manufacturing.

13. 9. The method for treating macro-sticky particles according to claim 7 or 8, wherein the macro-sticky-containing object is a slurry produced in a process for producing paper using waste paper raw materials.

14. The amount of macro-sticky in the macro-sticky-containing object is 5000 mm ２ 9. The method for treating macro-sticky particles according to claim 7 or 8, wherein the amount of the macro-sticky particles is equal to or more than 1 / kg.

15. The amount of the macro-sticky treatment agent used is 0.001 mg / mm ２ The macro-sticky processing method according to claim 7 or 8, wherein:

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