Paper treating agent, paper using same, and method for improving handfeel of paper

Abstract

Provided are: a paper treatment agent which is capable of imparting a smooth feeling unique to a gel by forming a gel on a coated paper and thereby preserving moisture derived from the treatment agent in the paper; a paper using the paper treatment agent; and a method for improving the texture of the paper. The paper treating agent contains (A) a polyol, (B) at least one selected from among alkyl phosphate salts having 6-28 carbon atoms in an alkyl group and polyoxyalkylene alkyl ether phosphate salts, and (C) water, wherein the content of the (C) water is more than 10% by mass but less than 40% by mass.

Description

Technical Field

[0001] The present invention relates to a paper treating agent, paper using the same, and a method for improving the feel of paper. Background Art

[0002] A soft, moist feel is a constant demand for paper products like toilet paper and tissues. Moisturizing tissues, for example, are treated with paper treatment agents containing moisturizing ingredients and have long been widely used. To impart softness to these moisturizing tissues, they are coated with paper treatment agents containing polyols such as glycerin.

[0003] Among paper treated with paper treatment agents containing moisturizing ingredients, moisturizing tissues are often used for blowing noses, and to reduce the burden on the skin, products with a good feel, such as reduced surface friction, are in demand. Paper products with moisturizing properties are often desired to have a feel that suits the user's preferences.

[0004] In order to try to solve the technical problem of improving the soft and moist feel, various countermeasures have been taken in the past. For example, Patent Document 1 attempts to improve the moist feeling by using the water absorption of hydrophilic polymers, but the uniform dispersion of water-soluble polymers requires time and labor, and the process of manufacturing the drug is complicated. In addition, because water-soluble polymers cause significant thickening, the amount of compounding has to be limited. Patent Document 2 attempts to improve the moist feeling by using a drug added by mixing glycerol and 1,3-propylene glycol, but the effect is not sufficient. Patent Document 3 attempts to improve the feel by using straight-chain alcohols, fatty acids, and anionic surfactants, but no research focusing on the structure of alkyl phosphate salts has been conducted, and there is room for improvement. Patent Documents 4 and 5 attempt to improve the feel by using alkyl phosphate salts, but no research has been conducted on the water content in the drug, and the effect is not sufficient.

[0005] Patent Document 6 proposes a drug consisting of a gel composition, but it is difficult to uniformly incorporate it directly into tissue paper. It requires complex steps such as heating and diluting to fluidize the composition, and requires extended drying time after dilution. Furthermore, the texture of the coated paper is not satisfactory.

[0006] Patent Document 7 proposes a drug having high stability and a good texture by preparing an emulsion such as a cosmetic material in advance and producing a drug using the emulsion as a raw material.

[0007] Prior art literature

[0008] Patent Literature

[0009] Patent Document 1: Japanese Patent Application Laid-Open No. 2009-263837.

[0010] Patent Document 2: Japanese Patent Application Laid-Open No. 2016-193042.

[0011] Patent document 3: Japanese Patent Application Publication No. 2019-099938.

[0012] Patent Document 4: Japanese Patent Application Laid-Open No. 2014-065986.

[0013] Patent Document 5: Japanese Patent Application Laid-Open No. 2009-243022.

[0014] Patent Document 6: Japanese Patent Application Laid-Open No. 2007-203089.

[0015] Patent document 7: Japanese Patent Application Laid-Open No. 2020-204142. Summary of the Invention

[0016] Problems to be solved by the invention

[0017] However, Patent Document 7 requires the production of both an emulsified cosmetic and a pharmaceutical, resulting in complex processes and a long production time. In the field of paper treatment agents containing moisturizing ingredients, technologies that impart a texture by forming a gel on paper after application, rather than before application, have not yet been studied. The present inventors focused on the concept of certain surfactants forming a gel after application to paper and investigated whether this previously unseen texture could be achieved. However, depending on the formulation and amount of the emulsified cosmetic, gel formation on paper was hindered, potentially preventing the smooth, glossy texture characteristic of gels.

[0018] The present invention has been made in view of the above-mentioned circumstances, and aims to provide a paper treatment agent, paper using the same, and a method for improving the feel of the paper. By causing the treatment agent to form a gel on the coated paper, moisture from the treatment agent is retained in the paper, thereby imparting the smooth and glossy feel unique to the gel.

[0019] Means for solving problems

[0020] To address the above-mentioned problems, the present inventors conducted intensive research and discovered that a paper treatment agent containing a polyol, at least one selected from an alkyl phosphate salt and a polyoxyalkylene alkyl ether phosphate salt having an alkyl group carbon number within a specific range, and water within a specific content range forms a gel on paper. Furthermore, the gel is a unique and characteristic gel that is different from other gels, thereby imparting a smooth and glossy feel unique to gels to paper. This discovery has led to the completion of the present invention.

[0021] Specifically, in order to solve the above-mentioned problems, the paper treatment agent of the present invention is characterized in that it contains (A) a polyol, (B) at least one selected from an alkyl phosphate salt having an alkyl group with 6 to 28 carbon atoms and a polyoxyalkylene alkyl ether phosphate salt, and (C) water, wherein the content of the water (C) is greater than 10% by mass and less than 40% by mass.

[0022] The paper of the present invention is characterized by being treated with the above-mentioned paper treating agent.

[0023] The method for improving the feel of paper of the present invention is characterized by treating paper with the above-mentioned paper treating agent.

[0024] The method for producing a paper treating agent of the present invention is characterized by comprising the step of adding the components (A) to (C).

[0025] The paper treatment agent of the present invention forms a unique and characteristic gel on the applied paper due to the specific combination of the above-mentioned components (A), (B), and (C), and the amounts of component (C). This allows the water from the treatment agent to be retained in the paper, imparting a moist feel and a smooth, slippery texture characteristic of the gel.

[0026] Effects of the Invention

[0027] According to the present invention, the treatment agent forms a unique and characteristic gel on the coated paper, thereby retaining moisture from the treatment agent within the paper and imparting a smooth, slippery feel unique to the gel. These significant effects are beyond the scope of what one skilled in the art could predict based on the configuration of the present invention. DETAILED DESCRIPTION

[0028] Hereinafter, the present invention will be described in detail.

[0029] The term "feel" in the present invention and the following description particularly includes the smooth and glossy feel peculiar to gel.

[0030] (Paper treatment agent)

[0031] The paper treatment agent of the present invention essentially contains (A) a polyol, (B) at least one selected from an alkyl phosphate salt having an alkyl group with 6 to 28 carbon atoms and a polyoxyalkylene alkyl ether phosphate salt, and (C) water, wherein the content of (C) water is greater than 10% by mass and less than 40% by mass.

[0032] (A) Polyol

[0033] The polyol as the component (A) in the paper treating agent of the present invention is a moisturizing agent that enhances the hygroscopicity and moisturizing properties of paper and imparts a moist feel and softness to the paper.

[0034] The polyol as the component (A) is not particularly limited, and examples thereof include glycerol, diglycerol, triglycerol, polyglycerol, 1,2-propylene glycol, 1,3-propylene glycol, dipropylene glycol, polypropylene glycol, 1,3-butylene glycol, 1,4-butylene glycol, 1,2-pentanediol, 1,2-hexanediol, ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, polyoxyethylene glycerol ether, isopentyl glycol, pentaerythritol, and trimethylolpropane.

[0035] In addition, sugar alcohols and saccharides may be used. Examples of sugar alcohols include sorbitol, inositol, glycosyl trehalose, xylitol, erythritol, mannitol, lactitol, fructose, oligosaccharide alcohols, maltitol, reduced palatinose, reduced syrup, and reduced starch hydrolyzate. Examples of saccharides include fructose, glucose, lactose, xylose, psicose, maltose, syrup, oligosaccharides, maltobiose, trehalose, lactose, palatinit, sucrose, isomerized sugars, isomaltooligosaccharides, fructooligosaccharides, galacto-oligosaccharides, xylo-oligosaccharides, lactofructooligosaccharides, soybean oligosaccharides, raffinose, stevia, licorice, saccharin, aspartame, acesulfame K, and sucralose.

[0036] These may be used alone or in combination of two or more.

[0037] Among these, glycerol, 1,3-butylene glycol, 1,2-propylene glycol, and sorbitol are preferred, and glycerol is more preferred.

[0038] The amount of the polyol (A) is not particularly limited, but can be, for example, 1% by mass or more relative to the total amount of the paper treatment agent. From the perspective of improving the feel of coated paper due to moisture absorption by the polyol (A), the amount is preferably 10% by mass or more, more preferably 20% by mass or more, even more preferably 40% by mass or more, even more preferably 60% by mass or more, even more preferably 70% by mass or more, particularly preferably 75% by mass or more, and most preferably 80% by mass or more, relative to the total amount of the paper treatment agent. Furthermore, from the perspective of improving the feel unique to the present invention, the amount is preferably 89% by mass or less, more preferably 85% by mass or less, relative to the total amount of the paper treatment agent. Furthermore, the amount is preferably 10 to 89% by mass, more preferably 20 to 89% by mass, and even more preferably 40 to 89% by mass, relative to the total amount of the paper treatment agent.

[0039] (B) Alkyl phosphate salts or polyoxyalkylene alkyl ether phosphate salts having an alkyl group with 6 to 28 carbon atoms

[0040] The paper treating agent of the present invention forms a unique and characteristic gel on paper by blending (B) an alkyl phosphate or a polyoxyalkylene alkyl ether phosphate in which the alkyl group has 6 to 28 carbon atoms with (A) a polyol, and further containing (C) water in an amount of more than 10% by mass and less than 40% by mass. This imparts a smooth, glossy feel unique to gels on paper.

[0041] The number of carbon atoms in the alkyl group of component (B) is not particularly limited as long as it is 6 to 28. However, from the perspective of imparting appropriate hardness to the gel formed by the treatment agent on the coated paper, the number of carbon atoms in the alkyl group is preferably 10 or more, more preferably 12 or more, and even more preferably 14 or more. From the perspective of imparting appropriate softness to the gel formed by the treatment agent on the coated paper, the number of carbon atoms in the alkyl group is preferably 24 or less, more preferably 22 or less, and even more preferably 20 or less. Furthermore, the number is preferably 8 to 24, more preferably 8 to 20, and even more preferably 12 to 18. The alkyl group may be either saturated or unsaturated, and may be either linear or branched.

[0042] The alkyl phosphate salt (B) of the present invention can be obtained by neutralizing a phosphate ester obtained by reacting an alcohol having an alkyl group with a phosphorus oxidant. Furthermore, the polyoxyalkylene alkyl ether phosphate salt of the present invention can be obtained, for example, by adding an alkylene oxide to an alcohol to form an alkylene oxide adduct, reacting the resulting alkylene oxide adduct with a phosphorus oxidant to form a phosphate ester, and then neutralizing the phosphate ester; or by adding an alkylene oxide to a phosphate ester obtained by reacting an alcohol with a phosphorus oxidant and then neutralizing the resulting phosphate ester.

[0043] As the alkylene oxide added to the alcohol, ethylene oxide, propylene oxide and butylene oxide can be mentioned, preferably ethylene oxide and propylene oxide. When obtaining the alkylene oxide adduct of the alcohol, the alcohol and the alkylene oxide can be mixed with two or more different alcohols and alkylene oxides respectively and used. In addition, when adding two or more different alkylene oxides, the alkylene oxides can be added randomly or in blocks. The addition polymerization degree of the alkylene oxide relative to the alcohol is not particularly limited. From the viewpoint of imparting a moderate hardness to the gel formed on the coated paper by the treating agent, it is preferably 30 or less, more preferably 20 or less, more preferably 10 or less, more preferably 5 or less, and particularly preferably 3 or less.

[0044] Examples of the phosphorus oxidizing agent that reacts with the alcohol or the alkylene oxide adduct of the alcohol include phosphorus pentoxide and phosphorus oxychloride.

[0045] Phosphate esters produced by reacting a phosphorus oxidizing agent with an alcohol include monoesters, diesters, and triesters. The ratio of monoesters, diesters, and triesters in the reaction product can be adjusted by adjusting the reaction ratio of the alcohol and phosphorus oxidizing agent, the reaction time, and other factors. While the reaction product produced by reacting an alcohol with a phosphorus oxidizing agent typically yields a mixture of monoesters, diesters, and triesters, it is the monoesters and diesters that react further with the alkylene oxide. However, even if triesters are present in the reaction product, the reaction with the alkylene oxide can proceed without separation or removal, and the presence of triesters in the treatment agent presents no problem.

[0046] When the phosphoric acid ester obtained by the reaction of an alcohol and a phosphorus oxidizing agent is a diester, the alcohol residues esterified and bonded to the phosphoric acid may be the same group or different groups.

[0047] As the alkylene oxide to be further reacted with the phosphate ester obtained by reacting the alcohol and the phosphorus oxidizing agent, ethylene oxide, propylene oxide, butylene oxide, etc. can be used, similarly to the alkylene oxide added to the alcohol, with ethylene oxide and propylene oxide being preferred. The degree of addition polymerization of the alkylene oxide to the phosphate ester of the alcohol is not particularly limited, but from the perspective of imparting an appropriate hardness to the gel formed by the treatment agent on the coated paper, it is preferably 30 or less, more preferably 20 or less, even more preferably 10 or less, even more preferably 5 or less, and particularly preferably 3 or less.

[0048] Examples of the linear or branched, saturated or unsaturated alkyl phosphate include hexyl phosphate, octyl phosphate, 2-ethylhexyl phosphate, nonyl phosphate, decyl phosphate, isodecyl phosphate, undecyl phosphate, lauryl phosphate, isolauryl phosphate, tridecyl phosphate, isotridecyl phosphate, myristyl phosphate, isomyristyl phosphate, pentadecyl phosphate, isopentadecyl phosphate, cetyl phosphate, hexadecyl phosphate, heptadecyl phosphate, stearyl phosphate, isostearyl phosphate, oleyl phosphate, nonadecyl phosphate, arachidyl phosphate, octyldodecyl phosphate, behenyl phosphate, lauryl phosphate, decyltetradecyl phosphate, hexacosyl phosphate, and octacosyl phosphate.

[0049] Examples of the polyoxyalkylene alkyl ether phosphate salts include polyoxyethylene hexyl ether phosphate salts (POE (1) to POE (30)), polyoxyethylene octyl ether phosphate salts (POE (1) to POE (30)), polyoxyethylene 2-ethylhexyl ether phosphate salts (POE (1) to POE (30)), polyoxyethylene decyl ether phosphate salts (POE (1) to POE (30)), polyoxyethylene isodecyl ether phosphate salts (POE (1) to POE (30)), polyoxyethylene lauryl ether phosphate salts (POE (1) to POE (30)), polyoxyethylene isolauryl alcohol ether phosphate salts (POE (1) to POE (30)), polyoxyethylene tridecyl ether phosphate salts (POE (1) to POE (30)), and polyoxyethylene octyl ether phosphate salts (POE (1) to POE (30)). 1)~POE(30)), polyoxyethylene myristyl ether phosphate salt (POE(1)~POE(30)), polyoxyethylene isomyristyl ether phosphate salt (POE(1)~POE(30)), polyoxyethylene pentadecyl ether phosphate salt (POE(1)~POE(30)), polyoxyethylene isopentadecyl alcohol ether phosphate salt (POE(1)~POE(30)), polyoxyethylene cetyl ether phosphate salt (POE(1)~POE(30)), polyoxyethylene hexyldecyl ether phosphate salt (POE(1)~POE(30)), polyoxyethylene stearyl ether phosphate salt (POE(1)~POE(30)), polyoxyethylene isostearyl ether phosphate salt (POE(1)~POE(30)), POE(30)), polyoxyethylene oleyl ether phosphate salt (POE(1)~POE(30)), polyoxyethylene nonadecyl ether phosphate salt (POE(1)~POE(30)), polyoxyethylene arachidyl ether phosphate salt (POE(1)~POE(30)), polyoxyethylene octyl dodecyl ether phosphate salt (POE(1)~POE(30)), polyoxyethylene behenyl ether phosphate salt (POE(1)~POE(30)), polyoxyethylene tetracosyl ether phosphate salt (POE(1)~POE(30)), polyoxyethylene decyl tetradecyl ether phosphate salt (POE(1)~POE(30)), polyoxyethylene hexacosyl ether phosphate salt (POE(1)~POE(30)), polyoxyethylene octyl dodecyl ether phosphate salt (POE(1)~POE(30)), polyoxyethylene decyl tetradecyl ether phosphate salt (POE(1)~POE(30)), polyoxyethylene hexacosyl ether phosphate salt (POE(1)~POE E(30)), polyoxyethylene dioctadecyl ether phosphate salt (POE(1)~POE(30)), polyoxypropylene hexyl ether phosphate salt (POP(1)~POP(30)), polyoxypropylene octyl ether phosphate salt (POP(1)~POP(30)), polyoxypropylene 2-ethylhexyl ether phosphate salt (POP(1)~POP(30)), polyoxypropylene decyl ether phosphate salt (POP(1)~POP(30)), polyoxypropylene isodecyl ether phosphate salt (POP(1)~POP(30)), polyoxypropylene lauryl ether phosphate salt (POP(1)~POP(30)), polyoxyethylene isolauryl alcohol ether phosphate salt (POP(1)~POP(30)),Polyoxypropylene tridecyl ether phosphate salt (POP (1) to POP (30)), polyoxypropylene myristyl ether phosphate salt (POP (1) to POP (30)), polyoxypropylene isomyristyl ether phosphate salt (POP (1) to POP (30)), polyoxypropylene pentadecyl ether phosphate salt (POP (1) to POP (30)), polyoxyethylene tridecyl alcohol ether phosphate salt (POP (1) to POP (30)), polyoxypropylene cetyl ether phosphate salt (POP (1) to POP (30)), polyoxypropylene hexadecyl ether phosphate salt (POP (1) to POP (30)), polyoxypropylene stearyl ether phosphate salt (POP (1) to POP (30)), polyoxypropylene isostearyl ether phosphate salt (POP (1) to POP (30)), polyoxypropylene Propylene oleyl ether phosphate salt (POP (1) ~ POP (30)), polyoxypropylene nonadecyl ether phosphate salt (POP (1) ~ POP (30)), polyoxypropylene arachidyl ether phosphate salt (POP (1) ~ POP (30)), polyoxypropylene octyldodecyl ether phosphate salt (POP (1) ~ POP (30)), polyoxypropylene behenyl ether phosphate salt (POP (1) ~ POP (30)), polyoxypropylene tetracosyl ether phosphate salt (POP (1) ~ POP (30)), polyoxypropylene decyltetradecyl ether phosphate salt (POP (1) ~ POP (30)), polyoxypropylene hexacosyl ether phosphate salt (POP (1) ~ POP (30)) and polyoxypropylene dioctadecyl ether phosphate salt (POP (1) ~ POP (30)), etc. It should be noted that the numbers in parentheses represent the number of polyoxyethylene (POE) or polyoxypropylene (POP) units.

[0050] The salt constituting component (B) is not particularly limited, and examples thereof include alkali metal salts, amine salts, and ammonium salts. The alkali metal salt is not particularly limited, and examples thereof include sodium salts and potassium salts. The amine salt is not particularly limited, and examples thereof include salts derived from amine compounds.

[0051] The amount of component (B) is not particularly limited, but from the perspective of improving the texture of the present invention, it is preferably greater than 0.05% by mass, more preferably greater than 0.15% by mass, even more preferably greater than 0.5% by mass, and even more preferably greater than 1.0% by mass relative to the total amount of the paper treatment agent. Furthermore, in order for the treatment agent to form a unique and characteristic gel on coated paper, the amount of component (B) is preferably 70% by mass or less, more preferably 40% by mass or less, and even more preferably 20% by mass or less relative to the total amount of the paper treatment agent. Furthermore, it is preferably greater than 0.05% by mass and less than 70% by mass, more preferably greater than 0.15% by mass and less than 70% by mass, even more preferably greater than 0.5% by mass and less than 70% by mass, and even more preferably greater than 0.5% by mass and less than 40% by mass relative to the total amount of the paper treatment agent.

[0052] (C) Water

[0053] Water as the component (C) in the paper treating agent of the present invention is an essential component for achieving the effects of the present invention in combination with the alkyl phosphate salt or polyoxyalkylene alkyl ether phosphate salt as the component (B).

[0054] (C) The water of the component is not particularly limited, and examples thereof include ion-exchanged water, tap water, and sterilized water.

[0055] The content of (C) water relative to the total amount of the paper treatment agent is greater than 10% by mass and less than 40% by mass. However, from the perspective of imparting appropriate softness to the gel formed by the treatment agent on coated paper, it is preferably 11% by mass or greater, more preferably 15% by mass or greater, and even more preferably 20% by mass or greater. From the perspective of imparting appropriate hardness to the gel formed by the treatment agent on coated paper, it is preferably 39% by mass or less, more preferably 30% by mass or less, and even more preferably 25% by mass or less. Furthermore, it is preferably greater than 10% by mass and less than 39% by mass, more preferably greater than 10% by mass and less than 30% by mass, and even more preferably greater than 10% by mass and less than 25% by mass.

[0056] In the paper treatment agent of the present invention, the mass ratio of component (B) to component (C) (component (B) / component (C)) is preferably 0.001 or greater, more preferably 0.01 or greater, and even more preferably 0.05 or greater, in order for the treatment agent to form a unique and characteristic gel on coated paper. Similarly, in order for the treatment agent to form a unique and characteristic gel on coated paper, the mass ratio is preferably 8 or less, more preferably 5 or less, and even more preferably 2 or less. Furthermore, the mass ratio is preferably 0.001 to 8, more preferably 0.01 to 8, even more preferably 0.01 to 5, and even more preferably 0.1 to 5.

[0057] (D) Other ingredients

[0058] In the paper treatment agent of the present invention, other components (D) other than those listed above may be added as raw materials, as long as the effects of the present invention are not impaired. Such other components are not particularly limited, and examples thereof include oily components, surfactants (nonionic surfactants, anionic surfactants other than component (B), cationic surfactants, and zwitterionic surfactants), moisturizing components other than component (A), thickeners, mildew inhibitors, preservatives, defoaming agents, fragrances, pigments, pH adjusters, extracts, antioxidants, anti-inflammatory agents, inorganic minerals, inorganic salts, and water-soluble polymers. These may be used alone or in combination of two or more.

[0059] <Oily ingredients>

[0060] The oily component primarily enhances the texture of the treated paper, such as a moist feel with an oily feel, and the feel (smoothness) of the surface. Examples of the oily component include hydrocarbons, oils, esters, fatty acids, higher alcohols, silicone oils, waxes, and steroids. These may be used alone or in combination of two or more.

[0061] Examples of the hydrocarbons include liquid paraffin, paraffin wax, solid paraffin, light isoparaffin, light liquid isoparaffin, liquid isoparaffin, ceresin, microcrystalline wax, petrolatum, squalane, polyethylene wax, polypropylene wax, hydrogenated polyisobutylene, ethylene-α-olefin cooligomers, and ethylene propylene polymers.

[0062] Examples of the oils and fats include avocado oil, almond oil, linseed oil, olive oil, cocoa butter, perilla oil, camellia oil, castor oil, sesame oil, wheat germ oil, rice germ oil, rice bran oil, camellia oil, safflower oil, soybean oil, evening primrose oil, camellia oil, corn oil, rapeseed oil, argan oil (Argania spinosa seed oil), palm kernel oil, coconut oil, palm oil, beef tallow, lard, horse oil, sheep oil, shea butter, cocoa butter, turtle oil, mink oil, egg yolk oil, purcellin oil, castor oil, sunflower oil, jojoba oil, grape seed oil, macadamia nut oil, cottonseed oil, meadowfowl seed oil, coconut oil, peanut oil, cod liver oil, rosehip oil, hardened tallow oil, extremely hardened tallow oil, hardened castor oil, and extremely hardened palm oil.

[0063] Examples of the esters include stearic acid alkyl esters, palmitic acid alkyl esters, myristic acid alkyl esters, lauric acid alkyl esters, behenic acid alkyl esters, oleic acid alkyl esters, isostearic acid alkyl esters, 12-hydroxystearate alkyl esters, undecenoic acid alkyl esters, lanolin fatty acid alkyl esters, erucic acid alkyl esters, coconut oil fatty acid alkyl esters, stearoyloxystearic acid alkyl esters, isononanoic acid alkyl esters, dimethyloctanate alkyl esters, octanate alkyl esters, lactic acid alkyl esters, ethylhexanoic acid alkyl esters, neopentanoic acid alkyl esters, malic acid alkyl esters, phthalic acid alkyl esters, citrate alkyl esters, malonate alkyl esters, adipate alkyl esters, ethylene glycol fatty acid esters, propylene glycol fatty acid esters, butylene glycol fatty acid esters, trimethylolpropane fatty acid esters, pentaerythritol fatty acid esters, polyglycerol fatty acid esters, trehalose fatty acid esters, and pentylene glycol fatty acid esters.

[0064] Examples of fatty acids include stearic acid, palmitic acid, myristic acid, lauric acid, behenic acid, oleic acid, isostearic acid, 12-hydroxystearic acid, undecylenic acid, lanolin fatty acid, erucic acid, and stearoyloxystearic acid.

[0065] Examples of the higher alcohols include lauryl alcohol, cetyl alcohol, cetearyl alcohol, stearyl alcohol, oleyl alcohol, behenyl alcohol, lanolin alcohol, hexyldecanol, myristyl alcohol, arachidyl alcohol, phytosterol, isostearyl alcohol, and octyldodecanol.

[0066] Examples of the silicone oils include amino-modified silicone oil, epoxy-modified silicone oil, carboxyl-modified silicone oil, polyether-modified oil, polyglycerol-modified silicone oil, dimethylpolysiloxane, dimethyl silicone, polyether-modified silicone, methylphenyl silicone, alkyl-modified silicone, higher fatty acid-modified silicone, methylhydrogen silicone oil, fluorine-modified silicone, epoxy-modified silicone, carboxyl-modified silicone, hydroxyl-modified silicone (carbinol-modified silicone), amino-modified silicone, methylpolysiloxane, methylphenylpolysiloxane, silicone resin, dimethylsiloxane, methylhydrogenpolysiloxane, methylcyclopolysiloxane, octamethyltrisiloxane, tetramethylhexasiloxane, and highly polymerized methylpolysiloxane.

[0067] Examples of the waxes include wood wax, beeswax, sumac wax, lacquer wax, sugarcane wax, palm wax, montan wax, carnauba wax, candelilla wax, rice wax, lanolin, spermaceti, reduced lanolin, liquid lanolin, hard lanolin, ceresin, and ozokerite.

[0068] Examples of steroids include cholesterol, dihydrocholesterol, and cholesterol fatty acid esters.

[0069] <Surfactant>

[0070] Among the surfactants, the nonionic surfactant is not particularly limited, and examples thereof include sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene fatty acid esters, polyoxyethylene hydrogenated castor oil, polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil fatty acid esters, castor oil fatty acid esters, hydrogenated castor oil fatty acid esters, ethylene glycol fatty acid esters, sucrose fatty acid esters, glycerol fatty acid esters, diglycerol fatty acid esters, polyglycerol fatty acid esters, organic acid monoglycerides, polyethylene glycol fatty acid monoethanolamides, propylene glycol fatty acid esters, polyoxyethylene lanolin alcohol ethers, polyoxyethylene alkyl ethers, lauric acid alkanolamides, polyoxyethylene glycerol fatty acid esters, polyoxyethylene hydrogenated castor oil pyroglutamic acid fatty acid diesters, pyroglutamic acid fatty acid glyceryl esters, polyoxyethylene glyceryl pyroglutamic acid fatty acid diesters, and polyether-modified silicones.

[0071] There are no particular limitations on anionic surfactants other than component (B), and examples thereof include sulfates, sulfonates, and carboxylates. Sulfates are not particularly limited, and examples thereof include alkyl sulfates, alkyl sulfate ester salts, alkyl ether sulfates, alkylamide sulfates, and polyoxyethylene alkyl ether sulfates. Sulfonates are not particularly limited, and examples thereof include alkyl sulfonates, alkylbenzenesulfonates, alkylnaphthalenesulfonates, sulfosuccinates, sulfo fatty acid ester salts, α-olefinsulfonates, alkyl acylalkyltaurates, and coconut fatty acid methyl sodium taurine. Carboxylates are not particularly limited, and examples thereof include fatty acid salts, N-acylamino acid salts (N-acyl-L-glutamates, N-acyl-L-arginine ethyl-DL-pyrrolidone carboxylates, etc.), alkyl ether carboxylates, and polyoxyethylene alkyl ether acetates.

[0072] The cationic surfactant is not particularly limited, and examples thereof include monoalkyltrimethylammonium salts, dialkyldimethylammonium salts, alkylpyridinium salts, N,N-dialkanoyloxyethyl-N-methyl,N-hydroxyethylammonium salts, alkylamine salts, and stearyldimethylbenzylammonium salts.

[0073] The amphoteric surfactant is not particularly limited, and examples thereof include alkyl betaines, fatty acid amide propyl betaine, lauryl hydroxyl sulfobetaine, 2-alkyl-N-carboxymethyl-N-hydroxyethyl imidazolinium betaine, lecithin, hydrogenated lecithin, alkyloxyhydroxypropyl arginine hydrochloride, lauryl hydroxyl sulfobetaine, lauryl iminodipropionic acid, sodium undecyl hydroxyethyl imidazolinium betaine, sodium laurylaminodiacetate, lauryldimethylaminoacetic acid betaine, N-(3-alkoxy-2-hydroxypropyl)-L-arginine hydrochloride, alkyl hydroxyl sulfobetaine, alkyl dimethyl amine oxide, sodium alkylaminodipropionate, dihydroxyalkylmethylglycine, and sodium lauryldiaminoethylglycine.

[0074] As the moisturizing ingredient other than (A) component, it is not particularly limited, for example, amino acids, alkalis / acids with hygroscopicity and their salts can be enumerated. As amino acids, for example, glycine, valine, leucine, isoleucine, serine, threonine, phenylalanine, arginine, lysine, aspartic acid, glutamic acid, cystine, cysteine, methionine and tryptophan etc. can be enumerated. As alkalis / acids with hygroscopicity and their salts, for example, trimethylglycine (Tri methyl glycine), betaine (Betaine), pyrophosphoric acid, sodium pyrophosphate, chondroitin sulfate, potassium pyrophosphate, hyaluronic acid, sodium hyaluronate, sodium metaphosphate, potassium polyphosphate, sodium pyrrolidonecarboxylate, sodium lactate, sodium chloride, calcium chloride, sodium alginate and sodium polyacrylate etc. can be enumerated. These can be used alone or in combination of two or more.

[0075] The content of component (D) is preferably 30% by mass or less, more preferably 10% by mass or less, further preferably 5% by mass or less, particularly preferably 1% by mass or less, and most preferably 0.5% by mass or less, based on the total amount of the paper treating agent.

[0076] While component (D) is optional, when treating paper using a paper treatment agent, a gel-forming effect is required. Specifically, the aqueous base containing components (A) and (C) forms a network with component (B) without inhibiting gelation. Component (D) that can inhibit gelation includes the following component (D1).

[0077] (D1) Components not preferred for gel formation

[0078] Examples of components that tend to inhibit gel formation include those that, when added to paper treatment agents, cause oily components to aggregate and separate, resulting in an uneven composition. Even if water evaporates from a material containing such components, it tends to be difficult to form a gel that exhibits the characteristic smooth and slippery feel characteristic of gels.

[0079] Such ingredients are emulsified cosmetics in the form of creams, milks, or liquids that are prepared in advance before addition. Emulsified cosmetics herein refer to substances containing at least an oily component, an aqueous component, and a surfactant for emulsifying these components. These substances are obtained by emulsifying the oily component and the aqueous component using a surfactant, as is well known in the art.

[0080] Emulsion-type cosmetics are formulated as product specifications, ensuring high emulsion stability as the final product. Furthermore, since they are not manufactured as if dispersed in other compositions, their addition to the paper treatment agent of the present invention may hinder gelation. Specifically, when component (D) is added as a raw material formulated without being incorporated into the final product, it can be adjusted to maintain uniformity by uniformly blending this raw material, thereby achieving a form that does not hinder gelation on coated paper. However, since pre-formulated emulsion-type cosmetics are composed of a high degree of combination of multiple raw materials, it is difficult to achieve uniform blending. Furthermore, controlling the form to not hinder gelation on coated paper is practically impossible. Since emulsion-type cosmetics are essentially materials that homogenize immiscible oily and aqueous components, it is known that the selection of ingredients and composition is necessary for stabilization. If a continuous phase of another component is mixed into a stable emulsion, it becomes unstable, particularly prone to separation, which tends to hinder the network formation of the gel by components (A) to (C).

[0081] The emulsified cosmetic used as the component (D1) is not particularly limited, and examples thereof include skin cosmetics (basic cosmetics), makeup cosmetics, and hair care cosmetics.

[0082] Examples of emulsified cosmetic formulations include cream, milk, liquid, and gel. A cream refers to a state that is generally opaque and has no fluidity at room temperature (25°C); an emulsion refers to a state that is generally opaque and white in appearance and has fluidity at room temperature (25°C); a liquid refers to a state that is generally transparent in appearance and has fluidity at room temperature (25°C); and a gel refers to a state that is generally transparent in appearance and has no fluidity at room temperature (25°C). In the present invention, it is particularly preferred that no cream, milk, or liquid cosmetics be present.

[0083] Examples of creamy cosmetics include cold cream, nourishing cream, foundation cream, body cream, moisturizing cream, hydrating cream, night cream, eye cream, hand cream, lip cream, shaving cream, body cream, hair cream, cleansing cream, baby cream, medicated cream, skin cream, gel cream, and botanical cream.

[0084] Examples of emulsion-like cosmetics include nourishing lotions, foundation lotions, body lotions, moisturizing lotions, hydrating lotions, night lotions, eye lotions, hand lotions, shaving lotions, body lotions, hair lotions, cleansing lotions, baby lotions, medicinal lotions, skin care lotions, and botanical milks.

[0085] Examples of liquid cosmetics include nourishing lotion, liquid foundation, lotion, moisturizing water, hydrating lotion, night essence water, eye essence water, shaving lotion, body lotion (body lotion), hair lotion (hair nourishing lotion), cleansing gel (cleansing water), baby skin care lotion, medicinal skin care lotion, skin care lotion (skin care lotion), botanical skin care lotion (botanical liquid), lotion, beauty essence, and makeup remover oil.

[0086] Examples of gel-like cosmetics include cooling gel, nourishing gel, foundation gel, emollient gel, moisturizing gel, moisture gel, night repair gel, eye gel, hand gel, lip gel, shaving gel, body gel, hair gel, cleansing gel, baby gel, medicinal gel, skin care gel, and botanical gel.

[0087] The composition of the emulsified cosmetics mentioned above can refer to the composition of existing emulsified cosmetics. Emulsified cosmetics mainly contain aqueous components (water and glycerin, etc.), oily components (hydrocarbons, higher fatty acids / alcohols, vegetable oils, ester oils and silicone oils, etc.) and surfactants (anionic, cationic, amphoteric, nonionic and silicone-based, etc.) as essential components. In addition, pigments / powders (talc, calcium carbonate, nylon and metal soaps, etc.), solvents (butylene glycol, propylene glycol, polyethylene glycol and isododecane, etc.), thickeners, film-forming materials, hobby ingredients (colorants, fragrances and pearlescent agents, etc.), functional ingredients (whitening ingredients, barrier function repair ingredients and plant extracts, etc.) and quality maintenance agents (preservatives, antioxidants and pH adjusters, etc.) are added as needed. It should be noted that cosmetics are generally classified by their dosage form. In addition to the aforementioned creamy, emulsion-like, liquid, and gel-like cosmetics, they also include lotions, serums, hair dyes, hair care products, foundations, shampoos, face cleansers / foams, sunscreens / sunscreen products, eyebrow / eyelash makeup, eye makeup, facial masks, men's skin care products, lipstick, perfumes / colognes, and nail makeup. Cosmetics have long been recognized as commodities circulated in the consumer market. Meanwhile, paper treatment agents are also recognized as products that impart moisturizing properties to paper products such as toilet paper and tissues, as well as in business-to-business transactions between paper treatment agent manufacturers. While these compositions may contain oily components, aqueous components, and surfactants, they are generally recognized and traded as products that incorporate their intended use. Furthermore, even in terms of the parts and objects to which they are applied, cosmetics are substances applied to human skin, hair, etc., such as skin applications, makeup applications, and hair care applications, while paper treatment agents are substances applied to paper, and in this respect, they are clearly different.

[0088] Depending on the formulation and amount of the component (D1) (emulsified cosmetic), the gel formation on paper may be inhibited, and the smooth and glossy texture peculiar to the gel may not be obtained.

[0089] The paper treatment agent of the present invention preferably contains substantially no emulsified cosmetics as component (D1). By substantially not containing emulsified cosmetics as component (D1), the treatment agent forms a unique and characteristic gel on the applied paper, retaining moisture from the treatment agent within the paper and imparting a smooth, slippery feel characteristic of the gel. "Substantially containing" is not particularly limited as long as it does not impair the effects of the present invention; for example, the amount of the agent contained is less than 0.4%, less than 0.3%, or less than 0.2% by mass relative to the total amount of the paper treatment agent.

[0090] The paper treatment agent of the present invention, containing components (A), (B), and (C), exhibits low viscosity before coating the paper. After coating, the paper treatment agent maintains a moderate amount of moisture on the coated paper, thereby achieving the effects of the present invention. As such, the low viscosity of the paper treatment agent of the present invention facilitates transportation and provides excellent workability, making it easy to manage the amount of treatment agent applied to the treated paper and improving workability. Furthermore, the paper treatment agent exhibits excellent uniformity of application to the paper, which is crucial for the paper's feel.

[0091] The paper treating agent of the present invention preferably has a viscosity of less than 2000 mPa·s, more preferably less than 500 mPa·s, as measured using a Brookfield viscometer at 60 rpm and 40°C.

[0092] Preferred examples of the paper treatment agent of the present invention include a paper treatment agent containing 20% ​​to 89% by mass of the component (A), more than 0.5% to 40% by mass of an alkyl phosphate having an alkyl group having 10 to 22 carbon atoms as the component (B), and more than 10% to 39% by mass of the component (C), based on the total amount of the paper treatment agent. Alternatively, a paper treatment agent containing 20% ​​to 89% by mass of the component (A), more than 0.5% to 40% by mass of a polyoxyalkylene alkyl ether phosphate having an alkyl group having 10 to 22 carbon atoms as the component (B), and more than 10% to 39% by mass of the component (C), based on the total amount of the paper treatment agent.

[0093] (Method for producing paper treatment agent)

[0094] The method for producing a paper treating agent of the present invention includes the step of adding components (A) to (C).

[0095] The paper treating agent of the present invention can be produced by uniformly mixing the respective raw materials according to a conventional method, and can be obtained, for example, by stirring and mixing at a temperature at which the respective raw materials dissolve.

[0096] In the paper treatment agent of the present invention, components (A), (B) and (C) may be uniformly mixed. In the case of adding component (D), components (A), (B), (C) and (D) may be uniformly mixed. For example, they may be in a melted state, a solubilized state, an emulsified state or a dispersed state.

[0097] In the method for producing a paper treatment agent of the present invention, it is preferred that the step of adding components (A) to (C) after stirring and mixing the raw materials does not include the step of adding an emulsified cosmetic as component (D1).

[0098] As mentioned above, component (D1) is not preferred for gel formation among component (D). In particular, if component (D1) is added to the homogeneous composition after components (A), (B), and (C) are uniformly mixed, the formation of a gel having specific physical properties that imparts a smooth, glossy feel on coated paper is hindered.

[0099] Here, "uniform" means that the phases are not separated visually, and includes, for example, not separating into upper and lower layers after standing.

[0100] (Paper)

[0101] The paper of the present invention is paper treated with the paper treating agent described above. The paper of the present invention is treated with the paper treating agent of the present invention, thereby expressing a smooth and glossy feeling unique to gel.

[0102] Examples of paper include tissue paper, toilet paper, cosmetic paper, pocket tissue, napkin paper, and paper towels.

[0103] The grammage of the paper is not particularly limited, but is preferably 1 to 50 g / m 2 , more preferably 5 to 20 g / m 2 The number of layers (ply number) (the number of base paper layers) is not particularly limited, but is preferably 1 to 5, more preferably 2 to 3.

[0104] (Method for manufacturing paper)

[0105] The paper of the present invention can be produced, for example, through the following steps 1 and 2.

[0106] Step 1: A step of adding (A) a polyol, (B) at least one selected from an alkyl phosphate salt having an alkyl group with 6 to 28 carbon atoms and a polyoxyalkylene alkyl ether phosphate salt, and (C) water to obtain a paper treatment agent having a water content (C) of more than 10% by mass and less than 40% by mass.

[0107] Step 2: a step of treating paper with the paper treating agent and forming a gel on the paper.

[0108] In step 1, a uniform composition containing components (A) to (C) is prepared. This paper treating agent is in liquid form.

[0109] In step 2, paper is treated with a paper treating agent, and water evaporates from the paper treating agent during the treatment process, thereby forming a gel on the paper.

[0110] Although not particularly limited, gelation herein refers to a state in which fluidity decreases. For example, when water evaporates from a liquid paper treatment agent placed in a container, the viscosity increases significantly. In particular, even if the container is tilted, the upper surface is unlikely to tilt, and even if the liquid is dripped from the container, it is unlikely to flow down significantly.

[0111] In step 2, the method for treating paper using a paper treatment agent is not particularly limited, and for example, a method of applying the paper to the paper can be cited. The method for applying the paper to the paper is not particularly limited, and for example, transfer, spraying, etc. can be cited. Among these methods, as a method of applying the paper to the paper, for example, a flexographic printing method, a gravure printing method, a spray method, and a rotor dampening method can be cited. In the flexographic printing method, a flexographic printing machine as a kind of relief printing machine is used, and a roller of a printing plate of rubber, synthetic resin, etc. with an engraved surface is used to transfer the paper treatment agent to the paper. In the gravure printing method, a gravure printing machine as a kind of gravure printing machine is used, and a roller installed with a metal cylinder having a plate made on the surface is used to transfer the paper treatment agent to the paper. In the spray method, the paper treatment agent is sprayed on the paper in a mist form from a nozzle by compressed air. In the rotor dampening method, a high-speed rotating disc is used to spray the paper treatment agent on the paper in a mist form.

[0112] The amount of the paper treatment agent applied to the paper is not particularly limited, but is preferably 1 to 12 g / m2 when converted to the mass of the paper treatment agent. 2 , more preferably 1.7 to 10 g / m 2 .

[0113] (Methods for improving the feel of paper)

[0114] The method for improving the feel of paper of the present invention is characterized by treating the paper with the paper treatment agent described above. The specific method of treating the paper with the paper treatment agent is described above. By treating the paper with the paper treatment agent of the present invention, a smooth, glossy feel, characteristic of the gel, is imparted to the paper, thereby improving its feel.

[0115] [Example]

[0116] Hereinafter, the present invention will be further described with reference to Examples, but the present invention is not limited to these Examples.

[0117] (1) Preparation of paper treatment agents

[0118] A paper treatment agent was prepared according to the following steps.

[0119] The raw materials were added to a beaker in the amounts listed in Tables 1A to 1D and stirred at a temperature at which they would dissolve to prepare a paper treatment agent. If the original amount contained water, the amounts of the components listed in Tables 1A to 1D represent the active ingredients after removing the water. The amount of water added in the tables is included in the original amount.

[0120] (2) Production of coated paper

[0121] The paper treatment agent obtained by the above method is evenly applied to dry paper towels (ply number 2, gram weight 12-14 g / m 2 ) on both sides so that the mass of the paper treating agent is 25 mass%±3% relative to the mass of the base paper, and then air-dried for 3 hours.

[0122] (3) Evaluation

[0123] The following evaluations were performed on the paper treating agents and coated papers of the respective Examples and Comparative Examples prepared above.

[0124] [Smooth, slippery feel unique to gel (sensory evaluation)]

[0125] As a sensory evaluation, 10 experienced panelists evaluated the coated paper produced by the above-mentioned step (2) based on the following evaluation points with a score of 1 to 3 points. Based on the average value, the smooth and glossy feeling unique to the gel was evaluated according to the following criteria.

[0126] <Evaluation points>

[0127] 3 points: The smooth and slippery feeling unique to gel is felt.

[0128] 2 points: A slight smooth feeling unique to gel is felt.

[0129] 1 point: The smooth, slippery feeling peculiar to gel was not felt.

[0130] <Evaluation Criteria>

[0131] ◎++: The average score of the 10 judges is 2.7 or higher.

[0132] ◎+: The average score of the 10 judges is 2.3 or higher and less than 2.7.

[0133] ◎: The average score of the 10 judges is 2.0 or higher and less than 2.3.

[0134] ○: The average score of the 10 judges is 1.8 or higher and less than 2.0.

[0135] △: The average score of the 10 judges was 1.5 or higher and less than 1.8.

[0136] ×: The average score of the 10 judges is less than 1.5 points.

[0137] [Smooth and slippery feeling unique to gel (tanδ value)]

[0138] In order to simulate the treatment agent on coated paper, the moisture content of the treatment agent on coated paper was calculated using the following formula, and a treatment agent having the calculated moisture content was prepared.

[0139] The moisture content (mass %) in the treatment agent on the coated paper = (amount of moisture derived from the treatment agent) / {(amount of moisture derived from the treatment agent)+(adherence amount)}.

[0140] The moisture content derived from the treatment agent is the moisture content of uncoated paper and coated paper measured in the evaluation of "Moisture Content of Coated Paper." The moisture content derived from the treatment agent on the coated paper was calculated using the following formula.

[0141] Moisture content derived from the treatment agent (mass %) = (moisture content of coated paper) - (moisture content of uncoated paper)

[0142] In addition, the coated paper was subjected to Soxhlet extraction to measure the amount of the extract, and the adhesion amount was calculated using the following formula.

[0143] Adhesion amount (mass %) = [(mass of extract) / {(mass of test paper) - (mass of extract)}] × 100

[0144] Using a rheometer MCR102 (manufactured by Anton Paar) as a test instrument, strain dispersion measurements were performed on the prepared samples (temperature 25°C, frequency 1 Hz). The loss modulus and storage modulus at a strain of 1% were measured, and the loss tangent was calculated using the following formula.

[0145] Loss tangent (tanδ value) = loss modulus (G') / storage modulus (G")

[0146] A larger tanδ value indicates a more viscous body (liquid properties), while a smaller value indicates a more elastic body (solid properties). The tanδ value is correlated with the smooth, slippery feel characteristic of gels. While a smaller tanδ value indicates a smoother feel, exceeding a certain value results in a solid-like property, causing the coated paper to become hard and have a poor feel.

[0147] From the perspective of forming a gel of moderate hardness, the tan δ value is preferably 10,000 or less, more preferably 100 or less, even more preferably 50 or less, and even more preferably 1 or less. Furthermore, from the perspective of forming a gel of moderate softness, the tan δ value is preferably 0.01 or greater, more preferably 0.1 or greater. Furthermore, it is preferably 0.1 or greater and 10,000 or less, and more preferably 0.1 or greater and 100 or less.

[0148] In Tables 1A to 1D, a correlation was confirmed between tan δ and "smoothness peculiar to gel" in the sensory evaluation.

[0149] The following evaluation was conducted to assess the difference between the aforementioned "smooth, slippery feel unique to gels" and conventional "smooth feel." For Example 5, Example 3, Comparative Example 1, and Comparative Example 2 in Table 1, the "smooth feel" of the latter was evaluated using the following criteria and compared with the "smooth, slippery feel unique to gels" of the former.

[0150] [Smoothness (sensory evaluation)]

[0151] As a sensory evaluation, 10 experienced panelists evaluated the coated paper produced by the above-mentioned step (2) with a score of 1 to 3 based on the following evaluation points. The smoothness was evaluated based on the average value according to the following criteria.

[0152] <Evaluation points>

[0153] 3 points: A smooth feeling is felt.

[0154] 2 points: Slightly smooth feeling.

[0155] 1 point: No smooth feeling was felt.

[0156] <Evaluation Criteria>

[0157] ◎: The average score of the 10 judges is 2.5 or higher.

[0158] ○: The average score of the 10 judges is 1.5 or higher and less than 2.5.

[0159] ×: The average score of the 10 judges is less than 1.5 points.

[0160] The results of the above evaluations are shown in Table 2. For Example 5, Example 3, Comparative Example 1, and Comparative Example 2, the results of "smooth feel" are reported together with the "smooth feel unique to the gel" and tan δ in Table 1. While no particular differences were observed in "smooth feel" between Example 5, Example 3, and Comparative Examples 1 and 2, significant differences were observed in "smooth feel unique to the gel."

[0161] [Moist feeling (sensory evaluation)]

[0162] As a sensory evaluation, 10 experienced panelists evaluated the coated paper prepared by the above-mentioned step (2) with a score of 1 to 3 based on the following evaluation points. The moist feeling was evaluated based on the average value according to the following criteria.

[0163] <Evaluation points>

[0164] 3 points: A moist feeling is felt.

[0165] 2 points: Slightly moist feeling.

[0166] 1 point: No moist feeling was felt.

[0167] <Evaluation Criteria>

[0168] ◎+: The average score of the 10 judges is 2.5 or higher.

[0169] ◎: The average score of the 10 judges is 2.0 or higher and less than 2.5.

[0170] ○: The average score of the 10 judges is 1.5 or higher and less than 2.0.

[0171] ×: The average score of the 10 judges is less than 1.5 points.

[0172] [Moisture content of coated paper]

[0173] Coated paper was produced by coating the paper with a treatment agent at a concentration of 25% by mass relative to the mass of dry tissue paper. Five sets (10 sheets) of the coated paper were left to stand for 24 hours at 25°C and 40% humidity, and their mass was measured to determine the moisture content of the coated paper. The samples were then placed in a dryer at 80°C, and the resulting mass of the paper was determined and calculated using the following formula.

[0174] Moisture content (mass %) = {(mass of conditioned paper) - (mass of absolutely dry paper)} / (mass of absolutely dry paper) × 100

[0175] [Viscosity of paper treatment agent]

[0176] The viscosity of the paper treating agent prepared in the step (1) above was measured at 60 rpm and 40° C. using a Brookfield viscometer and evaluated based on the following criteria.

[0177] <Evaluation Criteria>

[0178] ○: The viscosity of the paper treating agent is less than 500 mPa·s.

[0179] Δ: The viscosity of the paper treating agent is 500 mPa·s or more and less than 2000 mPa·s.

[0180] ×: The viscosity of the paper treating agent is 2000 mPa·s or more or cannot be measured (not kept uniform).

[0181] The formulations of the examples and comparative examples and the evaluation results of the various items are shown in Tables 1A to 1D. The formulation amounts of the various components in Tables 1A to 1D are shown in parts by mass.

[0182] In the evaluation of the various items in Tables 1A to 1D, the evaluation of the smooth, glossy feel unique to the gel (sensory evaluation) was ranked as 0, ◎, ◎+, and ◎++, indicating good results in terms of addressing the present invention's objectives. A score of △ or lower in this evaluation was considered to indicate that the present invention's objectives had not been addressed. The overall evaluation of each evaluation is also shown in Table 1 as a scale of ◎+, ◎, 0, △, and ×. The results regarding the differences between the aforementioned "smooth, glossy feel unique to the gel" and "smooth feel" are shown in Table 2.

[0183] In the table, C in (B) the alkyl phosphate or polyoxyalkylene alkyl ether phosphate represents the number of carbon atoms in the alkyl group.

[0184] [Table 1A]

[0185]

[0186] [Table 1B]

[0187]

[0188] [Table 1C]

[0189]

[0190] [Table 1D]

[0191]

[0192] [Table 2]

[0193] The smooth and slippery feeling unique to gel Smooth feel tanδ value Example 5 ◎+ ◎ 4.5 Example 3 ◎++ ◎ 0.8 Comparative Example 1 × ○ 0.005 Comparative Example 2 △ ◎ 101000

Claims

1. A paper treating agent, wherein The paper treating agent comprises (A) a polyol, (B) at least one selected from an alkyl phosphate salt having an alkyl group with 6 to 28 carbon atoms and a polyoxyalkylene alkyl ether phosphate salt, and (C) water, wherein the content of the water (C) is greater than 10% by mass and less than 40% by mass.

2. The paper treating agent according to claim 1, wherein Forms a gel on the treated paper.

3. The paper treating agent according to claim 1 or 2, wherein Contains essentially no emulsified cosmetics.

4. The paper treating agent according to any one of claims 1 to 3, wherein The content of the component (B) exceeds 0.5% by mass.

5. A paper, wherein The paper is treated with the paper treating agent according to any one of claims 1 to 4.

6. A method for improving the feel of paper, wherein: Paper is treated using the paper treating agent according to any one of claims 1 to 4.

7. A method for producing a paper treating agent, wherein: The production method is a method for producing the paper treating agent according to any one of claims 1 to 4, The production method includes the step of adding the components (A) to (C).

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