How to restore the shape of textile products

Abstract

To provide a method for restoring a lost shape of a textile product whereby the lost shape of the textile product can be restored.SOLUTION: A method for restoring a lost shape of a textile product involves washing a textile product including cellulose fibers with a mechanical force of which the MA value as measured according to the method disclosed in JA, the Annex of JIS L 1930:2014, is at most 35, by bringing a treatment solution comprising endo-type cellulase (component (a)) and water into contact with the textile product.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a method for restoring the shape of a textile product. [Background technology]

[0002] It is said that it is inevitable that clothing will lose the beautiful appearance it had when it was new due to repeated wearing and washing. Fashionable knit clothing in particular is made of yarns made of loosely twisted single fibers, and as a result, the yarns come undone and the single fibers that make up the yarns shift position when worn or washed, which makes the clothing prone to changes in appearance such as stretching and losing its shape. In other words, the beautiful appearance of the clothing, which is important to the wearer, is lost. In this way, the worn-out appearance of clothing occurs as the clothing becomes used.

[0003] Patent Document 1 describes a detergent for textile products that can effectively prevent deterioration of the quality of textile products, the detergent comprising: component (A): a water-soluble polymer having one or more selected from alkylene terephthalate units and alkylene isophthalate units, and (poly)oxyalkylene units; component (B): one or more selected from compounds represented by general formula (b1) and salts thereof; and component (C): a water-insoluble silicone, wherein the mass ratio of component (B) / component (A) is 0.5 to 5, and the mass ratio of component (A) / component (C) is 0.2 to 14. Patent Document 2 describes a textile product treatment agent which comprises component (A): a nonionic surfactant, component (B): cellulase, and component (C): one or more components selected from compounds represented by general formula (c1) and salts thereof, and in which the mass ratio of component (B) / component (C) is 0.05 to 3, and which can effectively suppress fluffing of textile products and can effectively suppress adhesion of fluff to the textile products.

[0004] Conventional methods for restoring the shape of textile products that have lost their shape generally involve the use of starches or synthetic polymers such as those described in Patent Document 1. However, these chemical substances have a high environmental impact from production to discharge. In the future, there is a demand for the selection of sustainable agents in order to realize a sustainable society. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2015-127369 A [Patent Document 2] International Publication No. 2014 / 077403 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention provides a method for restoring the shape of a textile product, which restores the shape of the textile product that has lost its shape. [Means for solving the problem]

[0007] The present invention relates to a method for restoring the shape of a textile product, comprising contacting a textile product containing cellulose fibers with a treatment liquid containing (a) endo-type cellulase (hereinafter referred to as component (a)) and water, and washing the textile product with a mechanical force having an MA value of 35 or less, as measured by the method described in Appendix JA of JIS L 1930:2014.

[0008] The present invention also relates to a shape recovery agent for textile products, which comprises component (a) and water.

[0009] The present invention also relates to use of the component (a) and water as a shape recovery agent for textile products.

[0010] The present invention also relates to use of the composition as a shape recovery agent for textile products, comprising (a) an endo-type cellulase and water.

[0011] The present invention also relates to a method for treating a textile product, comprising contacting a treatment liquid containing the component (a) and water with a textile product containing cellulose fibers, and washing the textile product with a mechanical force having an MA value of 35 or less as measured by the method described in Appendix JA of JIS L 1930:2014. Effect of the Invention

[0012] According to the present invention, there is provided a method for treating a textile product, which restores the shape of the textile product that has lost its shape. In the present invention, "shape loss" is defined by the curling deformation rate of the fabric described in paragraph

[0062] of this specification, and refers to a state in which the curling deformation rate is 18% or more. "Shape recovery" refers to a state in which the curling deformation rate has recovered from a state in which the curling deformation rate is 18% or more to less than 15%. In addition, "shape loss" is synonymous with creases and wear. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] [How to restore the shape of textile products] The present invention relates to a method for restoring the shape of a textile product, which comprises contacting a textile product containing cellulose fibers with a treatment liquid (hereinafter referred to as the treatment liquid of the present invention) containing (a) endo-type cellulase (hereinafter referred to as component (a)) and water, and washing the textile product with a mechanical force such that the MA value, as measured by the method described in Appendix JA of JIS L 1930:2014, is 35 or less. The present invention also relates to a method for treating a textile product, comprising contacting the treatment liquid of the present invention with a textile product containing cellulose fibers and washing the textile product with a mechanical force having an MA value of 35 or less, as measured by the method described in Annex JA of JIS L 1930:2014. Hereinafter, the method for restoring the shape of a textile product of the present invention and the method for treating a textile product of the present invention will both be referred to as the method of the present invention.

[0014] <Processing solution> The treatment liquid of the present invention contains endo-type cellulase as component (a) from the viewpoint of recovery from collapsed shape. Endo-type cellulase is a general term for cellulases that randomly hydrolyze cellulose chains to produce various cellooligosaccharides. As the endo-type cellulase, from the viewpoint of shape recovery, for example, one or more endoglucanase preparations selected from Cellclean 4500L (trade name, manufactured by Novozymes), Carezyme Premium 4500L (trade name, manufactured by Novozymes), and REVITALENZ 200 (trade name, manufactured by DuPont) are preferred. Of these, from the viewpoint of shape recovery, Carezyme Premium 4500L is more preferred as component (a). These components (a) may be used alone or in combination of two or more.

[0015] The content of component (a) in the treatment solution of the present invention, in terms of the amount of enzyme protein, from the viewpoint of restoring the shape of a textile product, is preferably 0.1 ppm or more, more preferably 0.2 ppm or more, even more preferably 0.5 ppm or more, still more preferably 1 ppm or more, still more preferably 3 ppm or more, still more preferably 5 ppm or more, and preferably 30 ppm or less, more preferably 20 ppm or less, and even more preferably 10 ppm or less. In the present invention, the mass of component (a) is defined as a value converted into a pure amount, i.e., an amount of enzyme protein. If component (a) is a commercially available product and the amount of enzyme protein is known, the value may be used as the amount of enzyme protein of component (a). When the amount of enzyme protein of component (a) is measured, it may be measured based on the Lowry method. For the Lowry method, a commercially available measurement kit, for example, DC Protein Assay Kit II (manufactured by Bio-Rad Laboratories), may be used for the measurement.

[0016] From the viewpoint of recovery from collapsed shape, the treatment liquid of the present invention may optionally contain a surfactant as component (b).

[0017] When the treatment liquid of the present invention contains component (b), it may contain, as component (b), one or more surfactants selected from (b1) a nonionic surfactant (hereinafter referred to as component (b1)) and (b2) anionic surfactants (hereinafter referred to as component (b2)) from the viewpoint of recovery from deformation.

[0018] The nonionic surfactant of component (b1) may be one or more selected from alkyl monoglyceryl ethers, polyoxyalkylene monoalkyl or alkenyl ethers, polyoxyalkylene fatty acid esters, sorbitan-based nonionic surfactants, aliphatic alkanolamides, fatty acid monoglycerides, and sucrose fatty acid esters.

[0019] Among these, from the viewpoint of recovery from deformation collapse, component (b1) may be one or more nonionic surfactants selected from compounds represented by general formula (b1-1) [hereinafter, component (b1-1)], compounds represented by general formula (b1-2) [hereinafter, component (b1-2)], compounds represented by general formula (b1-3) [hereinafter, component (b1-3)], and compounds represented by general formula (b1-4) [hereinafter, component (b1-4)]. R 1-1b -(AO) n -R 1-2b (b1-1) [In general formula (b1-1), R 1-1b is a hydrocarbon group having 9 to 18 carbon atoms, AO is an alkyleneoxy group, n is the average number of moles of AO added and is a number of 3 to 50, R 1-2b is a hydrogen atom or a methyl group. R 1-3b -O-(EO) x -(PO) y -(EO) z -R 1-4b (b1-2) [In general formula (b1-2), R 1-3b is a hydrocarbon group having 10 to 24 carbon atoms, EO is an ethyleneoxy group, PO is a propyleneoxy group, EO and PO are block-bonded in this order, y is the average number of moles of PO added and is a number of 1 to 6, x and z are the average number of moles of EO added, x+z is a number of 3 to 50, R1-4b is a hydrogen atom or a methyl group. R 1-5b COO-(AO) m -R 1-6b (b1-3) [In general formula (b1-3), R 1-5b is a hydrocarbon group having 9 to 24 carbon atoms, AO is an alkyleneoxy group, m is the average number of moles of AO added and is a number of 3 to 50, R 1-6b is a hydrogen atom or a methyl group. R 1-7b -O-(PO) s -(EO) t -R 1-8b (b1-4) [R in the formula 1-7b is an aliphatic hydrocarbon group having 10 to 24 carbon atoms, EO is an ethyleneoxy group, PO is a propyleneoxy group, EO and PO are block bonded in this order, s is the average number of moles of PO added and is a number of 0.1 to 20, t is the average number of moles of EO added and is a number of 4 to 25, R 1-8b is a hydrogen atom or a methyl group.

[0020] In general formula (b1-1), R 1-1b From the viewpoint of recovery from deformation, represents a hydrocarbon group having 9 or more carbon atoms, preferably 10 or more, more preferably 11 or more, and 18 or less, preferably 15 or less, more preferably 14 or less, preferably an alkyl or alkenyl group, more preferably an alkyl group. In general formula (b1-1), AO is an alkyleneoxy group, preferably an ethyleneoxy group or a propyleneoxy group, and more preferably an ethyleneoxy group. In general formula (b1-1), n ​​is a number of 3 or more, preferably 5 or more, more preferably 10 or more, and 50 or less, preferably 30 or less, more preferably 20 or less, from the viewpoint of recovery from collapsed shape. In general formula (b1-1), R 1-2b is preferably a hydrogen atom.

[0021] In general formula (b1-2), R 1-3bFrom the viewpoint of recovery from collapse, represents a hydrocarbon group having 10 or more carbon atoms, preferably 11 or more, more preferably 12 or more, and 24 or less, preferably 18 or less, more preferably 14 or less, preferably an alkyl or alkenyl group, more preferably an alkyl group. In the general formula (b1-2), y is a number of 1 or more, preferably 1.5 or more, more preferably 2 or more, and 6 or less, preferably 5 or less, more preferably 4 or less, from the viewpoint of recovery from collapsed shape. In general formula (b1-2), x+z is a number of 3 or more, preferably 5 or more, more preferably 10 or more, and 50 or less, preferably 30 or less, more preferably 25 or less, from the viewpoint of recovery from collapsed shape. In general formula (b1-2), R 1-4b is preferably a hydrogen atom.

[0022] In general formula (b1-3), R 1-5b From the viewpoint of recovery from collapsed shape, represents a hydrocarbon group having 9 or more carbon atoms, preferably 10 or more, more preferably 11 or more, and 24 or less, preferably 20 or less, more preferably 18 or less, preferably an alkyl or alkenyl group, more preferably an alkyl group. In general formula (b1-3), AO represents an alkyleneoxy group, preferably an ethyleneoxy group or a propyleneoxy group, and more preferably an ethyleneoxy group. In the general formula (b1-3), m is a number of 3 or more, preferably 5 or more, more preferably 10 or more, and 50 or less, preferably 30 or less, more preferably 20 or less, from the viewpoint of recovery from collapsed shape. In general formula (b1-3), R 1-6b is preferably a methyl group.

[0023] In general formula (b1-4), R 1-7b From the viewpoint of recovery from deformation, represents an aliphatic hydrocarbon group having 10 or more, preferably 12 or more, and 24 or less, preferably 20 or less, more preferably 18 or less, even more preferably 16 or less, and still more preferably 14 or less, preferably an alkyl or alkenyl group, more preferably an alkyl group. In general formula (b1-4), s represents the average number of moles of PO added, and from the viewpoint of recovery from deformation collapse, is a number that is 0.1 or more, preferably 1 or more, more preferably 2 or more, even more preferably 3 or more, and is 20 or less, preferably 10 or less, even more preferably 8 or less, still more preferably 6 or less, and even more preferably 4 or less. In general formula (b1-4), t is the average number of moles of EO added, and from the viewpoint of recovery from deformation, is a number of 4 or more, preferably 7 or more, more preferably 10 or more, and 25 or less, preferably 20 or less, more preferably 18 or less, and even more preferably 17 or less. In general formula (b1-4), R 1-8b is preferably a hydrogen atom.

[0024] Examples of the anionic surfactant of component (b2) include one or more selected from alkyl sulfates, alkenyl sulfates, polyoxyalkylene alkyl ether sulfates, polyoxyalkylene alkenyl ether sulfates, alkylbenzenesulfonic acids, alkenylbenzenesulfonic acids, alkanesulfonic acids, α-olefinsulfonic acids, internal olefinsulfonic acids, alkyl or dialkyl sulfosuccinic acids, alkenyl or dialkenyl sulfosuccinic acids, polyoxyalkylene alkyl or polyoxyalkylene dialkyl sulfosuccinic acids, polyoxyalkylene alkyl or polyoxyalkylene dialkyl sulfosuccinic acids, alkylsuccinic acids, alkenylsuccinic acids, fatty acids, and salts thereof.

[0025] Among these, the (b2) component may be one or more anionic surfactants selected from the group consisting of compounds represented by general formula (b2-1) (hereinafter, component (b2-1)), compounds represented by general formula (b2-2) (hereinafter, component (b2-2)), and compounds represented by general formula (b2-3) (hereinafter, component (b2-3)). From the viewpoint of recovery from collapse, the (b2) component is preferably one or more anionic surfactants selected from the group consisting of components (b2-3). R 2-1b -B-SO3M (b2-1) [In general formula (b2-1), R 2-1bis a hydrocarbon group having 8 to 22 carbon atoms, B is a benzene ring, and M is a hydrogen atom, an alkali metal, an alkaline earth metal (1 / 2 atom), ammonium, or an organic ammonium. 21b The sulfonic acid group is bonded at the para position. R 2-2b -O-(AO) p -SO3M (b2-2) [In general formula (b2-2), R 2-2b is a hydrocarbon group having 8 to 22 carbon atoms, AO is an alkyleneoxy group, p is the average number of moles of AO added and is a number of 0.1 to 10, and M is a hydrogen atom, an alkali metal, an alkaline earth metal (1 / 2 atom), ammonium, or an organic ammonium. R 2-3b -O-(PO) q (EO) r -SO3M (b2-3) [In general formula (b2-3), R 2-3b is a hydrocarbon group having 8 to 22 carbon atoms, PO is a propyleneoxy group, EO is an ethyleneoxy group, EO and PO may be bonded in a block or random manner, q is the average number of moles of PO added and is a number of 1 to 5, r is the average number of moles of EO added and is a number of 0.1 to 10, and M is a hydrogen atom, an alkali metal, an alkaline earth metal (1 / 2 atom), ammonium or an organic ammonium.

[0026] In general formula (b2-1), R 2-1b From the viewpoint of recovery from collapsed shape, represents a hydrocarbon group having 8 or more carbon atoms, preferably 9 or more, more preferably 10 or more, and 22 or less, preferably 18 or less, more preferably 14 or less, preferably an alkyl or alkenyl group, more preferably an alkyl group. In the general formula (b2-1), M is preferably a hydrogen atom, an alkali metal such as sodium or potassium, an alkaline earth metal (1 / 2 atom) such as magnesium or calcium, or an organic ammonium. M is more preferably an alkali metal such as sodium or potassium, or an alkanol ammonium such as monoethanol ammonium or diethanol ammonium, and further preferably sodium.

[0027] In general formula (b2-2), R 2-2b From the viewpoint of recovery from collapse, represents a hydrocarbon group having 8 or more carbon atoms, preferably 9 or more, more preferably 10 or more, and 22 or less, preferably 18 or less, more preferably 16 or less, preferably an alkyl or alkenyl group, more preferably an alkyl group. In general formula (b2-2), AO represents an alkyleneoxy group, preferably an ethyleneoxy group or a propyleneoxy group, and more preferably an ethyleneoxy group. In the general formula (b2-2), p is a number of 0.1 or more, preferably 0.5 or more, more preferably 1 or more, and 10 or less, preferably 5 or less, more preferably 3 or less, from the viewpoint of recovery from collapsed shape. In the general formula (b2-2), M is preferably a hydrogen atom, an alkali metal such as sodium or potassium, an alkaline earth metal (1 / 2 atom) such as magnesium or calcium, or an organic ammonium. M is more preferably an alkali metal such as sodium or potassium, or an alkanol ammonium such as monoethanol ammonium or diethanol ammonium, and further preferably sodium.

[0028] In general formula (b2-3), R 2-3b From the viewpoint of recovery from collapse, represents a hydrocarbon group having 8 or more carbon atoms, preferably 10 or more, more preferably 12 or more, and 22 or less, preferably 16 or less, more preferably 14 or less, preferably an alkyl or alkenyl group, more preferably an alkyl group. In the general formula (b2-3), PO and EO are preferably R 2-3b The -O is bonded in block to PO and EO in that order. In the general formula (b2-3), q is a number of 1 or more, preferably 1.5 or more, more preferably 1.8 or more, and 5 or less, preferably 3 or less, more preferably 2.5 or less, from the viewpoint of recovery from collapse of shape. In the general formula (b2-3), r is a number of 0.1 or more, preferably 1 or more, more preferably 2 or more, and 10 or less, preferably 5 or less, more preferably 3 or less, from the viewpoint of recovery from collapse of shape. In the general formula (b2-3), M is preferably a hydrogen atom, an alkali metal such as sodium or potassium, an alkaline earth metal (1 / 2 atom) such as magnesium or calcium, or an organic ammonium. M is more preferably an alkali metal such as sodium or potassium, an alkanol ammonium such as monoethanol ammonium or diethanol ammonium, and further preferably monoethanol ammonium.

[0029] When the treatment liquid of the present invention contains component (b), the content of component (b) is, from the viewpoint of recovery from deformation, preferably 50 ppm or more, more preferably 150 ppm or more, even more preferably 200 ppm or more, and preferably 600 ppm or less, more preferably 500 ppm or less, even more preferably 400 ppm or less. In the present invention, when the component (b2) is contained as the component (b), the mass of the component (b2) is specified using the value converted into the sodium salt for the components (b2-1) and (b2-2) and the value converted into the monoethanolamine salt for the component (b2-3).

[0030] When the treatment liquid of the present invention contains the component (b), the mass ratio (b) / (a) of the content of the component (a) to the content of the component (b) is, from the viewpoint of restoring the shape of a textile product, preferably 2 or more, more preferably 10 or more, even more preferably 50 or more, still more preferably 100 or more, and is preferably 6000 or less, more preferably 1000 or less, and even more preferably 500 or less.

[0031] From the viewpoint of recovery from collapsed shape, the treatment liquid of the present invention may further contain, as component (c), an organic solvent having a hydroxyl group.

[0032] Specific examples of the component (c), from the viewpoint of recovery from collapsed shape, include the following compounds (c1) to (c5). (c1) Monohydric alcohols with 2 to 4 carbon atoms, such as ethanol and isopropanol (c2) Polyhydric alcohols having 2 to 8 carbon atoms, such as ethylene glycol, propylene glycol, butylene glycol, hexylene glycol, and glycerin, and having a valence of 2 to 6. (c3) Glycol ethers having 4 to 12 carbon atoms, such as diethylene glycol, triethylene glycol, tetraethylene glycol, dipropylene glycol, and tripropylene glycol (c4) Alkyl ethers (having 1 to 10 carbon atoms) of polyhydric alcohols having a divalent or more and a tetravalent or less, such as diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monopropyl ether, diethylene glycol monobutyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, tripropylene glycol monomethyl ether, 1-methoxy-2-propanol, 1-ethoxy-2-propanol, 1-methyl glyceryl ether, 2-methyl glyceryl ether, 1,3-dimethyl glyceryl ether, 1-ethyl glyceryl ether, 1,3-diethyl glyceryl ether, 1-pentyl glyceryl ether, 2-pentyl glyceryl ether, 1-octyl glyceryl ether, 2-ethylhexyl glyceryl ether, and diethylene glycol monobutyl ether (c5) Aromatic ethers of glycols, such as phenoxyethanol, diethylene glycol monophenyl ether, triethylene glycol monophenyl ether, polyethylene glycol monophenyl ether having an average molecular weight of about 480, 2-benzyloxyethanol, and diethylene glycol monobenzyl ether.

[0033] When the treatment liquid of the present invention contains component (c), from the viewpoint of recovery from deformation, the content of component (c) is preferably 1.3 ppm or more, more preferably 13 ppm or more, even more preferably 40 ppm or more, and preferably 267 ppm or less, more preferably 200 ppm or less, even more preferably 133 ppm or less.

[0034] The treatment liquid of the present invention may contain components added to general compositions used in treating textile products, such as preservatives, pigments, chelating agents, hydrotropic agents, etc. (excluding components (a) to (c)). In addition to the above-mentioned components, the treatment liquid of the present invention may contain the following components (d1) to (d6) from the viewpoint of shape recovery. (d1) Silicone (d2) Defoaming agent (d3) Tertiary amines or their acid salts or quaternary amines (d4) Water-soluble polymer containing alkylene terephthalate units and / or alkylene isophthalate units and having (poly)oxyalkylene units (d5) Adhesive base (d6) Texture improver

[0035] The treatment liquid of the present invention contains water. As the water, ion-exchanged water, tap water, purified water, water containing 0.1 mg / kg to 3 mg / kg of sodium hypochlorite, etc. can be used. The treatment liquid of the present invention contains water in an amount of preferably 20% by mass or more, more preferably 30% by mass or more, and even more preferably 40% by mass or more, and 99% by mass or less.

[0036] From the viewpoint of recovery from collapsed shape, the pH of the treatment liquid of the present invention is preferably 5 or more, more preferably 6 or more, and preferably 9 or less, more preferably 8 or less. To adjust the pH to such a range, it is possible to use ordinary acids such as sulfuric acid, hydrochloric acid, phosphoric acid, citric acid, acetic acid, lactic acid, etc., inorganic alkali agents such as sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, etc., and alkanolamines having 2 to 6 carbon atoms such as monoethanolamine and triethanolamine. The pH of the treatment solution of the present invention can be measured, for example, using a glass electrode. The pH is measured at the temperature of the treatment solution when cleaning is performed, but may be measured at 25° C. The pH is measured according to the pH measurement method described below. [pH measurement method] A pH measurement composite electrode (HORIBA 9615S Measurement Method Model JF15) is connected to a pH meter (HORIBA pH / Ion Meter D-74) and the power is turned on. A saturated potassium chloride aqueous solution (3.33 mol / L) is used as the pH electrode internal solution. Next, a 100 mL beaker is filled with a pH 4.01 standard solution (phthalate standard solution), a pH 6.86 standard solution (neutral phosphate standard solution), and a pH 9.18 standard solution (borate standard solution), and the beaker is immersed in a thermostatic bath at 25°C for 30 minutes. The pH measurement electrode is immersed in the thermostatically adjusted standard solution for 3 minutes, and the calibration operation is performed in the order of pH 6.86 → pH 9.18 → pH 4.01. The sample to be measured is adjusted to 25°C, and the electrode of the pH meter is immersed in the sample and the pH is measured after 2 minutes.

[0037] The treatment liquid of the present invention can be used as a shape recovery agent for textile products. That is, the present invention provides a shape recovery agent for textile products, which contains component (a) and water. The shape recovery agent for textile products of the present invention is the same as the treatment liquid of the present invention described above, and the aspects described for the treatment liquid of the present invention can be applied to the treatment liquid of the present invention. Furthermore, the shape recovery agent for textile products of the present invention is suitable for a method for washing textile products containing cellulose fibers using a mechanical force having an MA value of 35 or less, preferably 25 or less, and preferably 1 or more, more preferably 5 or more, and even more preferably 10 or more, as measured by the method described in Appendix JA of JIS L 1930:2014, which will be described later.

[0038] <Textile products> The textile products targeted by the method of the present invention are textile products containing cellulose fibers from the viewpoint of shape recovery. Examples of cellulose fibers include seed hair fibers (cotton, cotton, kapok, etc.), bast fibers (hemp, flax, ramie, hemp, jute, etc.), leaf vein fibers (Manila hemp, sisal, etc.), palm fibers, rush, straw, and regenerated cellulose fibers (rayon, polynosic, cupra, acetate). From the viewpoint of enabling the user to feel the recovery from deformation, the textile product targeted by the method of the present invention preferably has a cellulose fiber content of 3 mass% or more, more preferably 5 mass% or more, even more preferably 10 mass% or more, still more preferably 20 mass% or more, still more preferably 30 mass% or more, still more preferably 40 mass% or more, and 100 mass% or less.

[0039] The textile products targeted by the method of the present invention may contain fibers other than cellulose fibers. The fibers other than cellulose fibers may be either hydrophobic fibers or hydrophilic fibers other than cellulose fibers. Examples of hydrophobic fibers include protein fibers (milk protein casein fibers, promix, etc.), polyamide fibers (nylon, etc.), polyester fibers (polyester, etc.), polyacrylonitrile fibers (acrylic, etc.), polyvinyl alcohol fibers (vinylon, etc.), polyvinyl chloride fibers (polyvinyl chloride, etc.), polyvinylidene chloride fibers (vinylidene, etc.), polyolefin fibers (polyethylene, polypropylene, etc.), polyurethane fibers (polyurethane, etc.), polyvinyl chloride / polyvinyl alcohol copolymer fibers (polycral, etc.), polyalkylene paraoxybenzoate fibers (benzoate, etc.), and polyfluoroethylene fibers (polytetrafluoroethylene, etc.). Examples of hydrophilic fibers other than cellulose fibers include animal hair fibers (wool, mohair, cashmere, camel hair, alpaca, vicuna, angora, etc.), silk fibers (domestic silk, wild silk), feathers, and the like.

[0040] In the present invention, examples of the textile products include, from the viewpoint of shape recovery, fabrics such as woven fabrics, knitted fabrics, and nonwoven fabrics using the above-mentioned fibers, and products obtained using the same, such as undershirts, T-shirts, dress shirts, blouses, slacks, hats, handkerchiefs, towels, knitwear, socks, underwear, tights, and masks.

[0041] <Cleaning process> The method of the present invention involves contacting the treatment liquid of the present invention with a textile product containing cellulose fibers and washing the textile product with a mechanical force such that the MA value, as measured by the method described in Appendix JA of JIS L 1930:2014, is 35 or less. The method for contacting the treatment liquid of the present invention with a textile product containing cellulose fibers is preferably a method in which the textile product containing cellulose fibers is immersed in the treatment liquid of the present invention.

[0042] The washing may be performed with a mechanical force such that the MA value, measured by the method described in Appendix JA of JIS L 1930:2014, is 35 or less, preferably 25 or less, and preferably 1 or more, more preferably 5 or more, and even more preferably 10 or more, from the viewpoint of restoring the shape of the textile product.

[0043] The MA value (Mechanical Action Value) is measured by punching five circular holes of 35 mm diameter in the center of a white cotton fabric with a certain stiffness, sewing the four corners of the MA test fabric to a textile product, and then performing a washing test. The MA value is calculated by adding up the number of threads pushed out from the top, bottom, left and right of the hole in the MA test fabric after washing and drying. The MA value is an indicator of the mechanical force applied to textile products during washing.

[0044] The MA value measured by the method described in Appendix JA of JIS L 1930:2014 can be specifically measured by the following method. (a) Preparation of MA test cloth The MA test cloth is a white cotton cloth with a certain stiffness and softness, with five circular holes of 35 mm in diameter punched in the center. This is washed together with the item to be washed, and after drying, the number of loose threads in the holes is counted. The total number of threads for the five holes is called the MA value (Mechanical Action Value), and the washing mechanical strength is evaluated depending on the size of this value. The MA test cloth is manufactured by the Danish Technological Institute (Denmark), and is an abbreviation for Mechanical Action Test Cloth. It is mainly available in two sizes: 40cm x 40cm and 24cm x 24cm. (b) Washing treatment of MA test cloth The MA test cloth is attached to the item to be washed, and the item to which the MA test cloth is attached is washed (including washing, rinsing, spin-drying, and drying) together with other items to be washed in any manner. (c) Measurement of MA value For the MA test fabric after washing, draw a thin line through the two warp threads and two weft threads closest to each hole, for a total of four, and mark a circumscribed square. Next, count the number of threads pushed out from the top, bottom, left, and right of the marked circumscribed square toward the center of the hole in the MA test fabric. To count the threads, count X = the number of broken threads, and Y = the number of threads that are stuck out while still connected, and then count these for the four points of the circumscribed square, calculate the sum of X + Y for one hole, and then find the total for the five holes.

[0045] As long as the mechanical force used for washing is within the above-mentioned range for the MA value, a rotary washing machine may be used, or the washing may be done by hand washing or by soaking. From the viewpoint of restoring the shape of the textile product, it is preferable to use a rotary washing machine. Specific examples of the rotary washing machine include a vertical washing machine, a two-layer washing machine, a drum washing machine, a pulsator washing machine, and an agitator washing machine. These rotary washing machines can be commercially available for home use.

[0046] In the method of the present invention, when a rotary washing machine is used, it is sufficient to wash with a mechanical force that causes the MA value to fall within the above-mentioned range, and the washing course can be selected from a dry course, delicates course, hand wash course, soft course, home cleaning course, delicate course, home cleaning course, etc.

[0047] In the method of the present invention, the bath ratio, which is the ratio of the mass of the textile product (kg) to the amount of water in the treatment solution (liters), i.e., amount of water in the treatment solution (liters) / mass of textile product (kg) (hereinafter, this ratio may be referred to as the bath ratio), is preferably 3 or more, more preferably 4 or more, even more preferably 5 or more, from the viewpoint of shape recovery, and is preferably 1,000 or less, more preferably 800 or less, even more preferably 500 or less.

[0048] From the viewpoint of recovery from deformation, the temperature of the treatment liquid during washing is preferably 0°C or higher, more preferably 3°C or higher, even more preferably 5°C or higher, and preferably 40°C or lower, more preferably 35°C or lower, even more preferably 30°C or lower.

[0049] From the viewpoint of recovery from deformation, the washing time is preferably 1 minute or more, more preferably 2 minutes or more, even more preferably 3 minutes or more, and preferably 30 minutes or less, even more preferably 20 minutes or less, and even more preferably 15 minutes or less. The washing time refers to the time during which the treatment liquid of the present invention is in contact with the textile product.

[0050] In the method of the present invention, after the textile product is brought into contact with the treatment liquid of the present invention and washed, the textile product may be further subjected to a dewatering step, a rinsing step, and a drying step, provided that the dewatering step, the rinsing step, and the drying step are all performed with a mechanical force having an MA value within the above-mentioned range.

[0051] [Dehydration process] In the method of the present invention, after the step of contacting the textile product with the treatment liquid of the present invention and washing it, a dehydration step of dehydrating the textile product can be performed. The dehydration step is a step of reducing the amount of treatment liquid present together with the textile product in the method of the present invention. By performing the dehydration step, the drying time described below can be shortened, and the textile product can be made suitable for wearing. The dehydration step can be carried out using a rotary washing machine, provided that the mechanical force is within the above-mentioned range for the MA value.

[0052] [Rinsing process] In the method of the present invention, a rinsing step can be carried out after the step of contacting the textile product with the treatment liquid of the present invention and washing it, or after the dehydration step of dehydrating the textile product. In the present invention, the rinsing step refers to a step of contacting the textile product obtained in the washing step with new water to reduce the amount of the treatment liquid of the present invention carried over with the textile product. The rinsing step can be carried out multiple times in combination with the dehydration step. The rinsing step can be carried out using a spin washing machine, provided that the mechanical force is within the above range for the MA value.

[0053] [Drying process] In the method of the present invention, a drying step of drying the textile product may be carried out after the washing step, the spin-drying step and the rinsing step. The drying step is a step for reducing the amount of water present in the textile product. The drying may be either natural drying or heat drying using a dryer. Each drying step may be carried out multiple times. A rotary heater dryer can be used for the drying step, provided that the mechanical force must be within the above-mentioned range for the MA value.

[0054] A preferred embodiment of the method of the present invention is one in which the treatment liquid of the present invention, in which the content of component (a) is preferably 0.1 ppm or more, more preferably 0.2 ppm or more, even more preferably 0.5 ppm or more, even more preferably 1 ppm or more, even more preferably 3 ppm or more, even more preferably 5 ppm or more, and preferably 30 ppm or less, more preferably 20 ppm or less, and even more preferably 10 ppm or less, is contacted with a textile product containing cellulose fibers, and the textile product is washed with a mechanical force such that the MA value, as measured by the method described in Appendix JA of JIS L 1930:2014, is 35 or less, preferably 25 or less, and preferably 1 or more, more preferably 5 or more, and even more preferably 10 or more.

[0055] The treatment liquid of the present invention is suitable for use as a shape recovery agent for textile products. That is, the present invention provides use of a shape recovery agent for textile products, comprising component (a) and water. The shape recovery agent for textile products containing component (a) and water is the same as the treatment liquid of the present invention, and the embodiments described for the treatment liquid of the present invention and the method of the present invention can be appropriately applied to it.

[0056] The shape recovery agent for textile products of the present invention is suitable for use in washing textile products containing cellulose fibers with a mechanical force of preferably 1 or more, more preferably 5 or more, and even more preferably 10 or more, having an MA value of 35 or less, preferably 25 or less, as measured by the method described in Appendix JA of JIS L 1930:2014.

[0057] The treatment liquid of the present invention is suitable for use as an agent for restoring the shape of textile products. That is, the present invention provides use of a shape recovery agent for textile products, which comprises component (a) and water. The shape recovery agent for textile products containing component (a) and water is the same as the treatment liquid of the present invention, and the embodiments described for the treatment liquid of the present invention and the method of the present invention can be appropriately applied to it.

[0058] The shape recovery agent for textile products of the present invention is suitable for use in cleaning textile products containing cellulose fibers, with an MA value, as measured by the method described in Appendix JA of JIS L 1930:2014, of 35 or less, preferably 25 or less, and a mechanical force of preferably 1 or more, more preferably 5 or more, and even more preferably 10 or more.

[0059] In addition to the above-mentioned embodiment, the present invention discloses the following aspects. To these aspects, the matters described in the method for recovering the shape of a textile product, the agent for recovering the shape of a textile product, the use as an agent for recovering the shape of a textile product, the application as an agent for recovering the shape of a textile product, and the method for treating a textile product of the present invention can be mutually and appropriately applied.

[0060] <1> A method for restoring the shape of a textile product, comprising contacting a textile product containing cellulose fibers with a treatment liquid containing (a) endo-type cellulase (hereinafter referred to as component (a)) and water, and washing the textile product with a mechanical force such that the MA value, as measured by the method described in Appendix JA of JIS L 1930:2014, is 35 or less.

[0061] <2> The content of the component (a) in the treatment liquid is preferably 0.1 ppm or more, more preferably 0.2 ppm or more, even more preferably 0.5 ppm or more, still more preferably 1 ppm or more, still more preferably 3 ppm or more, still more preferably 5 ppm or more, and preferably 30 ppm or less, more preferably 20 ppm or less, even more preferably 10 ppm or less. <1> The method for restoring the shape of a textile product according to claim 1.

[0062] <3> The MA value, as measured by the method described in Appendix JA of JIS L 1930:2014, is 35 or less, preferably 25 or less, and the textile product is washed with a mechanical force of preferably 1 or more, more preferably 5 or more, and even more preferably 10 or more. <1> or <2> The method for restoring the shape of a textile product according to claim 1.

[0063] <4> The treatment liquid further contains (b) a surfactant (hereinafter referred to as component (b)). <1> ~ <3> 13. A method for restoring the shape of a textile product according to any one of claims 1 to 12.

[0064] <5> The component (b) is at least one selected from the group consisting of (b1) a nonionic surfactant (hereinafter referred to as the component (b1)) and (b2) anionic surfactant (hereinafter referred to as the component (b2)). <4> The method for restoring the shape of a textile product according to claim 1.

[0065] <6> the component (b1) is one or more nonionic surfactants selected from a compound represented by general formula (b1-1) [hereinafter, component (b1-1)], a compound represented by general formula (b1-2) [hereinafter, component (b1-2)], a compound represented by general formula (b1-3) [hereinafter, component (b1-3)], and a compound represented by general formula (b1-4) [hereinafter, component (b1-4)]; <5> The method for restoring the shape of a textile product according to claim 1. R 1-1b -(AO) n -R 1-2b (b1-1) [In general formula (b1-1), R 1-1b is a hydrocarbon group having 9 to 18 carbon atoms, AO is an alkyleneoxy group, n is the average number of moles of AO added and is a number of 3 to 50, R 1-2b is a hydrogen atom or a methyl group. R 1-3b -O-(EO) x -(PO) y -(EO) z -R 1-4b (b1-2) [In general formula (b1-2), R 1-3b is a hydrocarbon group having 10 to 24 carbon atoms, EO is an ethyleneoxy group, PO is a propyleneoxy group, EO and PO are block-bonded in this order, y is the average number of moles of PO added and is a number of 1 to 6, x and z are the average number of moles of EO added, x+z is a number of 3 to 50, R 1-4b is a hydrogen atom or a methyl group. R 1-5b COO-(AO) m -R1-6b (b1-3) [In general formula (b1-3), R 1-5b is a hydrocarbon group having 9 to 24 carbon atoms, AO is an alkyleneoxy group, m is the average number of moles of AO added and is a number of 3 to 50, R 1-6b is a hydrogen atom or a methyl group. R 1-7b -O-(PO) s -(EO) t -R 1-8b (b1-4) [R in the formula 1-7b is an aliphatic hydrocarbon group having 10 to 24 carbon atoms, EO is an ethyleneoxy group, PO is a propyleneoxy group, EO and PO are block bonded in this order, s is the average number of moles of PO added and is a number of 0.1 to 20, t is the average number of moles of EO added and is a number of 4 to 25, R 1-8b is a hydrogen atom or a methyl group.

[0066] <7> The component (b1-1) is represented by the general formula (b1-1), R 1-1b is a hydrocarbon group having 9 or more carbon atoms, preferably 10 or more, more preferably 11 or more, and 18 or less, preferably 15 or less, more preferably 14 or less, preferably an alkyl group or an alkenyl group, more preferably an alkyl group; AO is an alkyleneoxy group, preferably an ethyleneoxy group or a propyleneoxy group, more preferably an ethyleneoxy group; n is a number of 3 or more, preferably 5 or more, more preferably 10 or more, and 50 or less, preferably 30 or less, more preferably 20 or less; R 1-2b is preferably a hydrogen atom; <6> The method for restoring the shape of a textile product according to claim 1.

[0067] <8> The component (b1-2) is represented by the general formula (b1-2), R 1-3bis a hydrocarbon group, preferably an alkyl or alkenyl group, more preferably an alkyl group, having 10 or more carbon atoms, preferably 11 or more, more preferably 12 or more, and 24 or less, preferably 18 or less, more preferably 14 or less carbon atoms; y is a number that is 1 or more, preferably 1.5 or more, more preferably 2 or more, and 6 or less, preferably 5 or less, more preferably 4 or less; x+z is a number that is 3 or more, preferably 5 or more, more preferably 10 or more, and 50 or less, preferably 30 or less, more preferably 25 or less; R 1-4b is preferably a hydrogen atom; <6> or <7> The method for restoring the shape of a textile product according to claim 1.

[0068] <9> The component (b1-3) is represented by the general formula (b1-3), R 1-5b is a hydrocarbon group having 9 or more, preferably 10 or more, more preferably 11 or more, and 24 or less, preferably 20 or less, more preferably 18 or less carbon atoms, preferably an alkyl or alkenyl group, more preferably an alkyl group; AO is an alkyleneoxy group, preferably an ethyleneoxy group or a propyleneoxy group, more preferably an ethyleneoxy group; m is a number of 3 or more, preferably 5 or more, more preferably 10 or more, and 50 or less, preferably 30 or less, more preferably 20 or less; R 1-6b is preferably a methyl group; <6> ~ <8> 13. A method for restoring the shape of a textile product according to any one of claims 1 to 12.

[0069] <10> The component (b1-4) is represented by the general formula (b1-4), R 1-7bis an aliphatic hydrocarbon group, preferably an alkyl or alkenyl group, more preferably an alkyl group, having 10 or more carbon atoms, preferably 12 or more and 24 or less, preferably 20 or less, more preferably 18 or less, even more preferably 16 or less, and still more preferably 14 or less carbon atoms; s is a number of 0.1 or more, preferably 1 or more, more preferably 2 or more, more preferably 3 or more and 20 or less, preferably 10 or less, even more preferably 8 or less, still more preferably 6 or less, and still more preferably 4 or less; t is a number of 4 or more, preferably 7 or more, more preferably 10 or more and 25 or less, preferably 20 or less, more preferably 18 or less, and still more preferably 17 or less; R 1-8b is preferably a hydrogen atom; <6> ~ <9> 13. A method for restoring the shape of a textile product according to any one of claims 1 to 12.

[0070] <11> the component (b2) is one or more anionic surfactants selected from a compound represented by general formula (b2-1) [hereinafter, component (b2-1)], a compound represented by general formula (b2-2) [hereinafter, component (b2-2)], and a compound represented by general formula (b2-3) [hereinafter, component (b2-3)], and is preferably one or more anionic surfactants selected from the component (b2-3); <5> ~ <10> 13. A method for restoring the shape of a textile product according to any one of claims 1 to 12. R 2-1b -B-SO3M (b2-1) [In general formula (b2-1), R 2-1b is a hydrocarbon group having 8 to 22 carbon atoms, B is a benzene ring, and M is a hydrogen atom, an alkali metal, an alkaline earth metal (1 / 2 atom), ammonium, or an organic ammonium. 21b The sulfonic acid group is bonded at the para position. R 2-2b -O-(AO) p -SO3M (b2-2) [In general formula (b2-2), R 2-2bis a hydrocarbon group having 8 to 22 carbon atoms, AO is an alkyleneoxy group, p is the average number of moles of AO added and is a number of 0.1 to 10, and M is a hydrogen atom, an alkali metal, an alkaline earth metal (1 / 2 atom), ammonium, or an organic ammonium. R 2-3b -O-(PO) q (EO) r -SO3M (b2-3) [In general formula (b2-3), R 2-3b is a hydrocarbon group having 8 to 22 carbon atoms, PO is a propyleneoxy group, EO is an ethyleneoxy group, EO and PO may be bonded in a block or random manner, q is the average number of moles of PO added and is a number of 1 to 5, r is the average number of moles of EO added and is a number of 0.1 to 10, and M is a hydrogen atom, an alkali metal, an alkaline earth metal (1 / 2 atom), ammonium or an organic ammonium.

[0071] <12> The component (b2-1) is represented by the general formula (b2-1), R 2-1b is a hydrocarbon group having 8 or more carbon atoms, preferably 9 or more, more preferably 10 or more, and 22 or less, preferably 18 or less, more preferably 14 or less, preferably an alkyl or alkenyl group, more preferably an alkyl group; M is preferably an alkali metal, an alkaline earth metal (1 / 2 atom) or an organic ammonium, more preferably an alkali metal or an alkanolammonium, even more preferably sodium; <11> The method for restoring the shape of a textile product according to claim 1.

[0072] <13> The component (b2-2) is represented by the general formula (b2-2), R 2-2bis a hydrocarbon group having 8 or more carbon atoms, preferably 9 or more, more preferably 10 or more, and 22 or less, preferably 18 or less, more preferably 16 or less, preferably an alkyl or alkenyl group, more preferably an alkyl group; AO is an alkyleneoxy group, preferably an ethyleneoxy group or a propyleneoxy group, more preferably an ethyleneoxy group; p is a number of 0.1 or more, preferably 0.5 or more, more preferably 1 or more, and 10 or less, preferably 5 or less, more preferably 3 or less; M is preferably an alkali metal, an alkaline earth metal (1 / 2 atom) or an organic ammonium, more preferably an alkali metal or an alkanolammonium, and even more preferably sodium; <11> or <12> The method for restoring the shape of a textile product according to claim 1.

[0073] <14> The component (b2-3) is represented by the general formula (b2-3), R 2-3b is a hydrocarbon group having 8 or more carbon atoms, preferably 10 or more, more preferably 12 or more, and 22 or less, preferably 16 or less, more preferably 14 or less, preferably an alkyl or alkenyl group, more preferably an alkyl group; PO and EO are preferably R 2-3b -O is block-bonded with PO and EO in this order, q is a number of 1 or more, preferably 1.5 or more, more preferably 1.8 or more, and 5 or less, preferably 3 or less, and more preferably 2.5 or less, r is a number of 0.1 or more, preferably 1 or more, more preferably 2 or more, and 10 or less, preferably 5 or less, and more preferably 3 or less, M is preferably an alkali metal, an alkaline earth metal (1 / 2 atom) or an organic ammonium, more preferably an alkali metal or an alkanol ammonium, and further preferably monoethanol ammonium. <11> ~ <13> 13. A method for restoring the shape of a textile product according to any one of claims 1 to 12.

[0074] <15> The content of the component (b) in the treatment liquid is preferably 50 ppm or more, more preferably 150 ppm or more, even more preferably 200 ppm or more, and preferably 600 ppm or less, more preferably 500 ppm or less, even more preferably 400 ppm or less. <4> ~ <14> 13. A method for restoring the shape of a textile product according to any one of claims 1 to 12.

[0075] <16> In the treatment liquid, the mass ratio (b) / (a) of the content of the component (a) to the content of the component (b) is preferably 2 or more, more preferably 10 or more, even more preferably 50 or more, still more preferably 100 or more, and is preferably 6000 or less, more preferably 1000 or less, even more preferably 500 or less. <4> ~ <15> 13. A method for restoring the shape of a textile product according to any one of claims 1 to 12.

[0076] <17> (a) A shape recovery agent for textile products, comprising endo-type cellulase and water.

[0077] <18> (a) Use of an endo-type cellulase and water as a shape recovery agent for textile products.

[0078] <19> The MA value, as measured by the method described in Appendix JA of JIS L 1930:2014, is 35 or less, preferably 25 or less, and is preferably used for washing textile products containing cellulose fibers with a mechanical force of 1 or more, more preferably 5 or more, and even more preferably 10 or more. <18> 2. Use of the above-mentioned agent for restoring the shape of a textile product.

[0079] <20> (a) Use as a shape recovery agent for textile products, comprising an endo-type cellulase and water.

[0080] <21> The MA value, as measured by the method described in Appendix JA of JIS L 1930:2014, is 35 or less, preferably 25 or less, and is preferably used for washing textile products containing cellulose fibers with a mechanical force of 1 or more, more preferably 5 or more, and even more preferably 10 or more. <20> 2. Use as a shape recovery agent for textile products according to claim 1.

[0081] <22> (a) A method for treating a textile product, comprising contacting a treatment liquid containing endo-type cellulase and water with the textile product containing cellulose fibers and washing the textile product with a mechanical force such that the MA value, as measured by the method described in Appendix JA of JIS L 1930:2014, is 35 or less.

[0082] <23> The MA value, as measured by the method described in Appendix JA of JIS L 1930:2014, is 35 or less, preferably 25 or less, and the textile product is washed with a mechanical force of preferably 1 or more, more preferably 5 or more, and even more preferably 10 or more. <22> A method for treating a textile product according to claim 1. EXAMPLES

[0083] The components used in the examples and comparative examples are shown below.

[0084] <Component (a)> a-1: Endo-type cellulase, Carezyme Premium 4500L, Novozymes a-2: Endo-type cellulase, Cellclean 4500L, Novozymes a-3: Endo-type cellulase, REVITALENZ 200, manufactured by DuPont

[0085] <(b) Component> ·b-1: (b1-1) component, in general formula (b1-1), R 1-1b is an alkyl group having 12 carbon atoms, AO is an ethyleneoxy group, n is 10, R 1-2b Compounds where is a hydrogen atom ·b-2: (b1-2) component, in general formula (b1-2), R 1-3bis an alkyl group having 12 to 14 carbon atoms, y is 2, x + z is 18, R 1-4b Compounds where is a hydrogen atom ·b-3: (b2-1) component, in general formula (b2-1), R 2-1b Compounds in which is an alkyl group having 10 to 14 carbon atoms and M is sodium ·b-4: (b1-3) component, in general formula (b1-3), R 1-5b is an alkyl group having 16 to 18 carbon atoms, AO is an ethyleneoxy group, m is 15, R 1-6b Compounds in which is a methyl group ·b-5: (b2-2) component, in general formula (b2-2), R 2-2b is an alkyl group having 10 to 16 carbon atoms, AO is an ethyleneoxy group, p is 2, and M is sodium ·b-6: (b2-3) component, in general formula (b2-3), R 2-3b is an alkyl group having 12 to 14 carbon atoms, PO and EO are block bonds, q is 2, r is 2, and M is monoethanolammonium ·b-7: (b1-4) component, in general formula (b1-4), R 1-7b is an alkyl group having 12 to 14 carbon atoms, s is 3.7, t is 16.5, and R 1-8b Compounds where is a hydrogen atom

[0086] <Preparation of concentrated processing solution> In a 200 ml beaker, ion-exchanged water was added in an amount to bring the total amount to 120 g. Then, component (b) was added to the 200 ml beaker and dissolved uniformly, after which component (a) was added and stirred for 10 minutes. Furthermore, the pH of the concentrate of the treatment liquid was adjusted to 7.0 using a pH adjuster (citric acid, monoethanolamine).

[0087] <Preparation of test cloth> A T / C jersey (knit) fabric (50% cotton, 50% polyester, MVS color TOP jersey, SAX MOKU, manufactured by Sojitz Fashion Co., Ltd.) was washed three times in a fully automatic washing machine (manufactured by Panasonic Corporation, NA-F70PB1) using a cleaning solution containing a nonionic surfactant (polyoxyethylene (6) alkyl ether) (surfactant concentration in the cleaning solution: 0.01% by mass, tap water (20°C), standard course (washing for 6 minutes, rinsing twice, spin-drying for 5 minutes), rinsed for 60 minutes in a two-tub washing machine (manufactured by HITACHI Corporation, PS-H45L), and spin-dried for 2 minutes. The washed T / C knit fabric was dried for 12 hours in an environment of 25°C / 40% RH, and cut into a 6 x 6 cm square so that the length was parallel to the wale direction and the width was parallel to the course direction to prepare a test fabric.

[0088] <Preparation of deformed test cloth> Thirty pieces of the test cloth were washed three times in a fully automatic washing machine (AW-8D7(W) manufactured by TOSHIBA Corporation) (tap water (20°C), standard cycle (8 minutes of washing, 2 rinses, 5 minutes of spin-drying), bath ratio 20). The washed T / C knitted cloth was dried for 12 hours in an environment of 25°C / 40% RH to prepare a test cloth that had lost its shape.

[0089] <Cleaning of test cloth that has lost its shape> The test cloth that had lost its shape was washed with the concentrated treatment solution prepared using the washing method described in Table 1. The cleaning method described in Table 1 is as follows.

[0090] Hand washing: 4L of tap water (20℃) was poured into a tub, and the concentrated treatment solution was poured in to obtain the treatment solution concentration shown in Table 1, and the mixture was stirred by hand. Six test cloths that had lost their shape were turned upside down in the tub 25 times, and then spun for 15 seconds in a twin-tub washing machine (HITACHI Corporation, PS-H45L). 4L of tap water was poured into another tub, and rinsed (15 turns upside down) twice, and spun for 15 seconds. This operation (hand washing-rinsing-spinning) was repeated three times. The hand-washed test cloths were dried for 12 hours in an environment of 25℃ / 40%RH. The MA value of the above washing method, measured by the method described in Appendix JA of JIS L 1930:2014, was 8.

[0091] Soaking: 4L of tap water (20℃) was poured into a tub, and the concentrate of the treatment solution was poured in to obtain the treatment solution with the concentration in Table 1, and the mixture was stirred by hand. Six pieces of test cloth that had lost their shape were soaked in the tub for 30 minutes, and then spin-dried for 15 seconds in a twin-tub washing machine (HITACHI Corporation, PS-H45L). 4L of tap water was poured into another tub, and the cloth was rinsed twice (15 ups and downs), and spin-dried for 15 seconds. This operation (soaking-rinsing-spinning) was repeated three times. The soaked and washed test cloth was dried for 12 hours in an environment of 25℃ / 40%RH. The MA value measured by the method described in Appendix JA of JIS L 1930:2014 for the above washing method was 2.

[0092] Dry cycle: 28 L of tap water (20°C) and concentrated treatment solution were added to a fully automatic washing machine (AW-8D7(W) manufactured by TOSHIBA Corporation) to obtain the treatment solution with the concentration shown in Table 1. Six test cloths that had lost their shape were placed in the fully automatic washing machine and washed three times on the dry cycle (wash for 6 minutes - rinse twice - spin for 4 minutes), bath ratio 40). The washed test cloths were dried for 12 hours in an environment of 25°C / 40% RH. The MA value of the above washing method, measured by the method described in Appendix JA of JIS L 1930:2014, was 18.

[0093] Standard cycle: 28 L of tap water (20°C) and concentrated treatment solution were added to a fully automatic washing machine (AW-8D7(W) manufactured by TOSHIBA Corporation) to obtain a treatment solution with the concentration shown in Table 1. Six test cloths that had lost their shape were placed in the fully automatic washing machine and washed three times using the standard cycle (8 minutes of washing - 2 rinses - 5 minutes of spin-drying), bath ratio 20). The washed test cloths were dried for 12 hours in an environment of 25°C / 40% RH. The MA value for the above washing, measured using the method described in Appendix JA of JIS L 1930:2014, was 45.

[0094] <Evaluation of shape recovery> The shape recovery of each washed test cloth was calculated using the curling deformation rate formula below and evaluated according to the following criteria. The results are shown in Table 1. The higher the criterion value for the shape recovery evaluation, the more preferable it is. The curling change rate of the test cloth that had lost its shape was 18% or more.

[0095]

number

[0096] 〔Judgment criteria〕 0: Curling deformation rate 18% or more 1: Curling deformation rate is 15% or more but less than 18% 2: Curling deformation rate is 10% or more but less than 15% 3: Curling deformation rate is 5% or more but less than 10% 4: Curling deformation rate is 0% or more but less than 5%

[0097] [Table 1]

Claims

1. A method for restoring the shape of a textile product, comprising contacting a textile product containing cellulose fibers with a treatment solution containing 0.5 ppm or more and 30 ppm or less of (a) endo-type cellulase (hereinafter referred to as (a) component) in terms of enzyme protein amount and water, and washing the textile product with a mechanical force having an MA value of 10 or more and 35 or less, as measured by the method described in Appendix JA of JIS L 1930:2014.

2. 2. The method for restoring the shape of a textile product according to claim 1, wherein the treatment liquid further contains a surfactant (b) (hereinafter referred to as component (b)), and the component (b) contains one or more surfactants selected from the group consisting of (b1) a nonionic surfactant and (b2) an anionic surfactant.

3. 3. The method for restoring the shape of a textile product according to claim 2, wherein the mass ratio (b) / (a) of the content of the component (a) to the content of the component (b) in the treatment liquid is 2 or more and 6,000 or less.

4. (a) A shape recovery agent for textile products, which contains endo-type cellulase in an amount of 0.5 ppm or more and 30 ppm or less in terms of enzyme protein, and water, and is used to wash textile products containing cellulose fibers with a mechanical force having an MA value of 10 or more and 35 or less, as measured by the method described in Appendix JA of JIS L 1930:2014.

5. (a) Use of endo-type cellulase as a shape recovery agent for textile products containing 0.5 ppm or more and 30 ppm or less in terms of enzyme protein amount and water, the shape recovery agent being used to wash textile products containing cellulose fibers with a mechanical force having an MA value of 10 or more and 35 or less, as measured by the method described in Appendix JA of JIS L 1930:2014.

6. (a) Use as a shape recovery agent for textile products containing endo-type cellulase in an amount of 0.5 ppm or more and 30 ppm or less in terms of enzyme protein, and water, wherein the use as a shape recovery agent for textile products is for cleaning textile products containing cellulose fibers with a mechanical force having an MA value of 10 or more and 35 or less, as measured by the method described in Appendix JA of JIS L 1930:2014.

7. (a) A method for treating a textile product, comprising contacting a treatment solution containing 0.5 ppm or more and 30 ppm or less of endo-type cellulase, in terms of enzyme protein amount, and water with a textile product containing cellulose fibers, and washing the textile product with a mechanical force having an MA value of 10 or more and 35 or less, as measured by the method described in Appendix JA of JIS L 1930:2014.

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