JP7846982B2 - Deodorizing sheets for textile products used in dryers - Google Patents

Description

This invention relates to a deodorizing sheet for use in a dryer for textile products.

Methods for processing textile products in a dryer are well known. In this process, sheets containing textile treatment agents are commonly used. For example, in the case of deodorization, a fragrance-containing sheet is heated and dried together with the textile product in the rotating drum of the dryer, and the resulting steam and fragrance deodorize the textile product.
The solvents incorporated into the fiber treatment agent-containing sheets volatilize in the dryer, and their odor can remain in the treated textile products. To address this problem, a technique is known that uses butoxypropoxypropanol, which has a low odor, as the solvent (Patent Document 1).
Furthermore, a technique for gelling solvents is known for purposes such as stabilizing fiber treatment agents (Patent Document 2).
Regarding deodorization, there are concerns that using fragrances for deodorization (masking with scent) can result in a strong lingering scent on textile products (smell harassment).

Special Publication No. 11-502885 Patent No. 3171339

The inventors investigated fragrance compositions that could deodorize textile products without leaving excessive fragrance when processed in a dryer, and found a specific fragrance composition. However, it was found that this fragrance composition was not sufficiently stable and separated at low temperatures, resulting in a decrease in deodorizing function and deterioration of appearance (such as the occurrence of patchy yellowing) in deodorizing sheets containing it. Therefore, when a deodorizing sheet was created by incorporating butoxypropoxypropanol, a solvent described in Patent Document 1, as a stabilizer, a new problem arose: odors derived from the solvent remaining in the deodorizing sheet became apparent under the fragrance composition, which had suppressed excessive fragrance.
Therefore, the challenge was set to provide a deodorizing sheet that can deodorize textile products in a dryer without leaving an excessive fragrance, while suppressing the solvent-derived odor that remains on the deodorizing sheet.

The inventors conducted thorough research and found that the aforementioned problems can be solved by using specific amounts of a fragrance component having a ClogP value of 3 or higher, propylene glycol, and a nonionic surfactant. This invention is based on this finding.

In other words, the present invention relates to the following [1] to [8].
[1] A deodorizing sheet for textile products used in a dryer,
The deodorizing sheet comprises a liquid deodorizing agent composition and a sheet base material.
The liquid deodorant composition comprises (A) propylene glycol, (B) a fragrance composition, and (C) a nonionic surfactant.
(B) In component (B), the content of fragrance components having a ClogP value of 3 or more is 40% by mass or more of the total mass of the fragrance composition.
(B) The content of component is 0.005 to 0.1% by mass relative to the total mass of the liquid deodorant composition.
A sheet characterized in that the content of component (C) is 0.1 to 0.6% by mass relative to the total mass of the liquid deodorant composition.
[2] The sheet according to [1], wherein the content of component (A) is 2 to 20% by mass relative to the total mass of the liquid deodorant composition.
[3] The sheet according to [1] or [2], wherein the fragrance component having a ClogP value of 3 or more is selected from the group consisting of Tonalid, Galaxolid benzyl benzoate 50% solution, Iso-E Super, Hexyl salicylate, Sedlumber, Limonene, Hexyl cinnamic aldehyde, Ambroxan, Citronellyl acetate, p-t-butylcyclohexyl acetate, Geranyl acetate, Habanolide, Allylcyclohexyl propionate, β-Damascone, Beldox, Linalyl acetate, α-Damascone, Damascenone, Ethyl linalool, Lilial, Citronellol, Thymol, Dihydromyrcenol, Citral, Floropal, Linalool, Flutate, Liral, 1,8-Cineole, and Allylheptanoate.
[4] The sheet according to any one of the above items [1] to [3], wherein component (C) is a polyoxyalkylene-added nonionic surfactant.
[5] The sheet according to any one of the above [1] to [4], wherein the liquid deodorant composition further comprises (D) a semipolar surfactant.
[6] The sheet according to [5], wherein component (D) is an amine oxide type surfactant.
[7] The sheet according to [5] or [6], wherein the content of component (D) is 0.1 to 5% by mass relative to the total mass of the liquid deodorant composition.
[8] A method for deodorizing textile products in a dryer,
A method comprising the step of subjecting a textile product to a drying treatment in a rotating tank of a dryer together with a deodorizing sheet described in any one of the above items [1] to [7].

As shown in the examples described later, according to the present invention, textile products can be deodorized in a dryer without leaving excessive fragrance, while suppressing solvent-derived odors. Therefore, the present invention can provide textile treatment products with added value not found in conventional products.

The present invention's "deodorizing sheet for textile products used in dryers" (hereinafter also referred to as "deodorizing sheet") comprises a "liquid deodorant composition" and a "sheet base material." The liquid deodorant composition contains "(A) propylene glycol," "(B) fragrance composition," and "(C) nonionic surfactant." Each component is described below.

[(A) Component: Propylene glycol]
Component (A) is incorporated as a solvent that can improve the stability of the liquid deodorant composition by improving the dispersibility of components (B) and (C). By using propylene glycol as a solvent, odors derived from the solvent remaining on the deodorant sheet can be suppressed.
The content of component (A) is preferably 2 to 20% by mass, more preferably 5 to 15% by mass, relative to the total mass of the liquid deodorant composition. A content of 2 to 20% by mass yields a higher blending effect.

[Component (B): fragrance composition]
(B) Component is added to deodorize textile products without leaving an excessive fragrance.
Component (B) contains a fragrance component having a ClogP value of 3 or more, preferably 4 or more, and more preferably 5 or more. There is no particular upper limit to the ClogP value of this fragrance component, but it is preferably 8 or less, and more preferably 7 or less.
The ClogP value is the 1-octanol/water partition coefficient P of a compound (the ratio of equilibrium concentrations in 1-octanol and water) expressed as a logarithmic value (logP) with base 10. The ClogP value can be determined by the f-value method (hydrophobic fragment constant method), which involves decomposing the chemical structure of a compound into its constituent parts and accumulating the hydrophobic fragment constant f-values of each fragment (see, for example, Clog 3 Reference Manual DailylightSoftware 4.34, Albert Leo, David Weininger, Version 1, March 1994).

Examples of "fragrance components with a ClogP value of 3 or higher" include the following substances. The number in parentheses following the substance name is the ClogP value.
Limonene (4.83), α-Pinene (4.27), Myrcene (4.88), Citral (3.45), Ambercore (3.969), α-Damascone (4.29), β-Damascone (4.42), δ-Damascone (4.16), Aldehyde C-14 Peach (3.83), Benzyl Benzoate (3.88), 3-(4-tert-butylphenyl)propanal (3.55), Citronellol (3.56), Damascenone (4.21), Dihydromyrcenol (3.47), Dynascone (3.63), Floralozone (3.46), Floropal (3.43), Flutate (3.37), Geranyl Acetate (4.48), Ionon Alpha (3.71), Ionon Beta (3.77), Lactone C-10 Gamma (3.30), Lilial (3.86), Linalyl Acetate (4.39), Mayol (3.33), Pamplefleur (3.04), Porenate (3.67), Turpinyl Acetate (3.58), Tetrahydrolinalool (3.52), Tetrahydromugol (3.52), Undecaverthol (3.69), 1,8-Cineole (3.13), Linalool (3.38), Ethyl Linalool (3.87), Hexyl Cinnamic Aldehyde (4.82), Tonalid (6.35), Galaxolide Benzyl benzoate 50% solution (6.26), IsoE Super (5.18), Hexyl salicylate (5.06), Sedlumber (5.03), Ambroxan (4.76), Citronellyl acetate (4.56), p-t-butylcyclohexyl acetate (4.50), Habanolide (4.48), Allylcyclohexyl propionate (4.47), Beldox (4.42), Thymol (3.52), Lilal (3.32), Allylheptanoate (3.10), Ethyl myristate (6.70), Isophytol (7.80), Phytol (8.20)

Among the aforementioned fragrance components, Tonalid (6.35), Galaxolid benzyl benzoate 50% solution (6.26), IsoE Super (5.18), Hexyl salicylate (5.06), Sedlumber (5.03), Limonene (4.83), Hexyl cinnamic aldehyde (4.82), Ambroxan (4.76), Citronellyl acetate (4.56), p-t-butylcyclohexyl acetate (4.50), Geranyl acetate (4.48), Habanolide (4.48), Allylcyclohexyl propionate ( 4.47), β-Damascone (4.42), Beldox (4.42), Linalyl acetate (4.39), α-Damascone (4.29), Damascenone (4.21), Ethyl linalool (3.87), Lilial (3.86), Citronellol (3.56), Thymol (3.52), Dihydromyrcenolate (3.47), Citral (3.45), Floropal (3.43), Linalool (3.38), Flutate (3.37), Liral (3.32),
Preferably, one or more are selected from the group consisting of 1,8-cineole (3.13) and allylheptanoate (3.10), more preferably three or more, and even more preferably ten or more.
More preferably, iso-E Super (5.18), hexyl salicylate (5.06), cedrumber (5.03), limonene (4.83), hexyl cinnamic aldehyde (4.82), ambroxan (4.76), citronellyl acetate (4.56), p-t-butylcyclohexyl acetate (4.50), geranyl acetate (4.48), habanolide (4.48), allylcyclohexyl One or more, preferably three or more, and particularly preferably ten or more, fragrances are selected from the group consisting of propionate (4.47), β-damascone (4.42), veldox (4.42), linalyl acetate (4.39), α-damascone (4.29), damascenone (4.21), ethyl linalool (3.87), lilial (3.86), citronellol (3.56), and thymol (3.52). By using a combination of multiple fragrances selected from the above, a highly palatable fragrance composition can be obtained that can deodorize textile products without leaving an excessive scent.

"Fragrance components having a ClogP value of 3 or higher" are known substances and are readily available on the market or can be prepared.
The "fragrance component having a ClogP value of 3 or higher" may be a single type or multiple types may be used in combination.

The content of "fragrance components having a ClogP value of 3 or higher" is 40% by mass or more, preferably 40-85% by mass, and more preferably 55-80% by mass, based on the total mass of the fragrance composition.

[Optional components of fragrance compositions]
The following optional ingredients may be added, provided that they do not impair the effects of the "fragrance component having a ClogP value of 3 or higher."

[Fragrance components with a ClogP value of less than 3]
"Fragrance components with a ClogP value of less than 3" are added to enhance the fragrance when the deodorizing sheets are placed in a dryer.
Examples of fragrance components with a ClogP value of less than 3 include the following substances. The number in parentheses following the substance name is the ClogP value.
α-Pinene (2.8), Terpinolene (2.8), Linalool (2.7), Geraniol (2.9), Nerol (2.9), Dihydromyrcenol (2.9), Borneol (2.7), cis-3-Hexenol (1.3), Ethyl Butyrate (1.3), Hexyl Acetate (1.4), α-Terpineol (1.8), Cinnamic Aldehyde (1.9), Hydroxycitronellol (1.9), Laurinal (1.6), Methyldihydrojasmonate (2.98), Frescomente (2.94), Tripral (2.85), Hexyl Acetate (2.83), Octanal (2.78), Manzanate (2.76), Eugenol (2.73), l-Menthol (2.68), Cis-3-Hexenyl Aetate (2.61), Gamma Decalactone (2.57), Helional (2.51), Styraryl Acetate (2.5), Benzyl Acetate (2.08), Cis-3-Hexenol (1.61), Phenylate Alcohol (1.57)

"Fragrance components with a ClgP value of less than 3" are known substances and are readily available on the market or can be prepared.
"Fragrance components having a ClogP value of less than 3" may be used individually or in combination of multiple types.

The content of "fragrance components having a ClogP value of less than 3" is preferably 60% by mass or less, more preferably 15 to 60% by mass, and even more preferably 20 to 45% by mass, based on the total mass of the fragrance composition.

(B) Component is a known substance and is readily available on the market or can be prepared.
(B) Component may be a single type or multiple types may be used in combination.
The content of component (B) is 0.005 to 0.1% by mass, preferably 0.01 to 0.1% by mass, and more preferably 0.02 to 0.1% by mass, based on the total mass of the liquid deodorant composition.

[(C) Ingredient: Nonionic surfactant]
(C) Component is added to enhance the stability of the liquid deodorant composition.
(C) Any nonionic surfactant known in the field of textile treatment agents can be used as component (C) without particular limitation, but a "polyoxyalkylene-added nonionic surfactant" is preferred.

Examples of "polyoxyalkylene-added nonionic surfactants" include polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene hexitane fatty acid esters, and polyoxyethylene sorbitan fatty acid esters, with polyoxyethylene hydrogenated castor oil being preferred.
The alkylene oxides to be added are preferably ethylene oxide (EO) and propylene oxide (PO), with EO being more preferred.
The average number of moles of alkylene oxide added per molecule of surfactant is preferably 3 to 100, more preferably 5 to 60, and particularly preferably 10 to 40.
As the "polyoxyalkylene-added nonionic surfactant," polyoxyethylene hydrogenated castor oil with an average number of added EO moles of 5 to 60 is even more preferred.

(C) Component is a known substance and is readily available on the market or can be prepared.
(C) Component may be a single type or multiple types may be used in combination.
The content of component (C) is 0.1 to 0.6% by mass, preferably 0.15 to 0.4% by mass, and more preferably 0.2 to 0.3% by mass, based on the total mass of the liquid deodorant composition.

[Optional components of liquid deodorant composition]
The following optional ingredients may be included, provided they do not impair the effects of the essential ingredients.

[Component (D): Semipolar surfactant]
Component (D) is added to further enhance the deodorizing effect of the liquid deodorant composition.
A "semipolar surfactant" is a surfactant that has semipolar bonds (bonds that have properties intermediate between nonpolar and polar bonds). Solutions and dispersions of "semipolar surfactants" exhibit cationic, anionic, or bipolar properties depending on their pH.
An example of component (D) is an amine oxide type surfactant.
Examples of amine oxide-type surfactants include caprylyldimethylamine oxide, lauryldimethylamine oxide (AX), myristyldimethylamine oxide, palmityldimethylamine oxide, stearyldimethylamine oxide, oleyldimethylamine oxide, coconut alkyldimethylamine oxide, lauryl diethylamine oxide, caprylic acid amidopropyl dimethylamine oxide, lauric acid amidopropyl dimethylamine oxide (APAX), myristate acid amidopropyl dimethylamine oxide, palmitic acid amidopropyl dimethylamine oxide, stearic acid amidopropyl dimethylamine oxide, behenin acid amidopropyl dimethylamine oxide, oleic acid amidopropyl dimethylamine oxide, and coconut fatty acid amidopropyl dimethylamine oxide.
Among these substances, AX and APAX are preferred.

(D) Component is a known substance and is readily available on the market or can be prepared.
(D) Component may be a single type or multiple types may be used in combination.
The content of component (D) is preferably 0.1 to 5% by mass, more preferably 0.5 to 4% by mass, and particularly preferably 1.0 to 3% by mass, based on the total mass of the liquid deodorant composition.

〔water〕
The liquid deodorant composition is preferably an aqueous composition containing water.
Tap water, purified water, deionized water, distilled water, and ion-exchanged water can be used, but ion-exchanged water is preferred.
The water content is not particularly limited and can be adjusted as needed to achieve the desired component composition.

[Preservatives]
Preservatives are added to the deodorizing sheets to enhance their preservative and antibacterial properties, thereby extending their shelf life.
As preservatives, any substance known in the field of textile treatment agents can be used without particular restriction. Specific examples include isothiazolone-based organosulfur compounds, benzisothiazolone-based organosulfur compounds, benzoic acids, and 2-bromo-2-nitro-1,3-propanediol.
Examples of isothiazolone-type organosulfur compounds include 5-chloro-2-methyl-4-isothiazolin-3-one, 2-n-butyl-3-isothiazolon, 2-benzyl-3-isothiazolon, 2-phenyl-3-isothiazolon, 2-methyl-4,5-dichloroisothiazolon, 5-chloro-2-methyl-3-isothiazolon, 2-methyl-4-isothiazolin-3-one, and mixtures thereof. Among these, 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one are preferred, and a mixture of 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one is more preferred, with a mixture of about 77% by mass of the former and about 23% by mass of the latter, or a diluted solution thereof (for example, isothiazolone solution), being particularly preferred.
Examples of benzisothiazolon-based organosulfur compounds include 1,2-benzisothiazolin-3-one, 2-methyl-4,5-trimethylene-4-isothiazolin-3-one, related compounds such as dithio-2,2-bis(benzmethylamide), and mixtures thereof. Among these, 1,2-benzisothiazolin-3-one is particularly preferred.
Examples of benzoic acids include benzoic acid or its salts (e.g., sodium salts), p-hydroxybenzoic acid or its salts, methyl p-hydroxybenzoate (methylparaben), ethyl p-hydroxybenzoate, propyl p-hydroxybenzoate, butyl p-hydroxybenzoate, and benzyl p-hydroxybenzoate.
A single type of preservative may be used, or multiple types may be used in combination.
The preservative content is not particularly limited as long as the purpose of formulation is achieved, but is preferably 0.0001 to 1% by mass relative to the total mass of the liquid deodorant composition.

[Other optional ingredients]
Organic solvents other than component (A), surfactants other than components (C) and (D), silicones, pH adjusters, antioxidants, etc. may be added.
Examples of organic solvents other than component (A) include ethylene glycol, diethylene glycol, dipropylene glycol, glycerin, isoprene glycol, propylene glycol monomethyl ether, propylene glycol monoethyl ether, diethylene glycol monobutyl ether, 3-methyl-3-methoxybutanol, phenoxyethanol, phenyl glycol, phenyldiglycol, phenoxyisopropanol, and benzyl alcohol.
Examples of surfactants other than components (C) and (D) include didecyldimethylammonium chloride, didecyldimethylammonium methosulfate, distearyldimethylammonium chloride, dioctyldimethylammonium chloride, distearyldihydroxyethylammonium chloride, ditallow alkyldimethylammonium chloride, di(stearoyloxyethyl)dimethylammonium chloride, di(oleoyloxyethyl)dimethylammonium chloride, di(palmitoyloxyethyl)dimethylammonium methosulfate, di(stearoyloxyisopropyl)dimethylammonium chloride, di(o Cationic surfactants include cationic surfactants such as oleoyloxyisopropyl)dimethylammonium chloride, di(oleoyloxybutyl)dimethylammonium chloride, di(stearoyloxyethyl)methylhydroxyethylammonium methosulfate, and tri(stearoyloxyethyl)methylmethosulfate, as well as anionic surfactants such as α-olefin sulfonates, linear or branched alkyl sulfate esters, alkyl ether sulfate esters or alkenyl ether sulfate esters, alkyl group-containing alkane sulfonates, α-sulfo fatty acid esters, alkyl sulfosuccinate esters, and linear alkylbenzene sulfonates. Examples of these salts include alkali metal salts such as sodium and potassium, and alkanolamine salts such as monoethanolamine and diethanolamine.

[Sheet base material]
The sheet substrate holds the liquid deodorant composition before use and releases the liquid deodorant composition when in use.
As the sheet substrate, any material used in the art can be used without particular limitations, but hydrophilic fibers and hydrophobic fibers are preferred.

[Hydrophilic fibers]
Hydrophilic fibers may be fibers made of hydrophilic substances (compounds having hydrophilic functional groups such as hydroxyl groups, amino groups, or carboxyl groups), or they may be fibers made of hydrophobic substances whose surface has been treated to make them hydrophilic.
Examples of hydrophilic fibers made from hydrophilic substances include natural cellulose fibers (cotton, pulp, hemp, etc.), regenerated cellulose fibers (rayon, cupro, lyocell, Tencel, etc.), chitin fibers, alginate fibers, and collagen fibers.

[Hydrophobic fibers]
Examples of hydrophobic fibers include polyolefin fibers (polyethylene (PE), polypropylene (PP), etc.), polyester fibers (polyethylene terephthalate, etc.), polyamide fibers (nylon, etc.), polyacrylonitrile fibers, polyvinyl alcohol fibers, and mixtures of these fibers.
Hydrophobic fibers may also be composite fibers. Examples of composite fibers include core-sheath fibers and side-by-side fibers. Core-sheath fibers are preferred in terms of fiber tensile strength, and among these, PP/PE core-sheath fibers (PP fibers with the surface coated with PE) are preferred.

[An aggregate of hydrophilic and hydrophobic fibers]
The sheet substrate is preferably an aggregate of hydrophilic and hydrophobic fibers. When it is a fiber aggregate, the liquid deodorant composition is absorbed by the hydrophilic fibers (due to the polarity or capillary force of the hydrophilic fibers), which enables better sustained release of the liquid deodorant composition.

The mass ratio of hydrophilic fibers to hydrophobic fibers (hydrophilic fibers/hydrophobic fibers) in the fiber aggregate is preferably 50/50 to 90/10, more preferably 60/40 to 80/20.

Examples of fiber aggregates include paper, wet or dry nonwoven fabrics, woven fabrics, and knitted fabrics. Card webs are also acceptable as long as there is no substantial fiber shedding. Paper and nonwoven fabrics are preferred from the standpoint of processability and cost.
As for the paper, wet pulp sheets manufactured using a papermaking method, or dry pulp sheets made by forming defibrated and laminated pulp fibers into a sheet using a binder, can be used.
As for the nonwoven fabric, wet-laid nonwoven fabrics and dry-laid nonwoven fabrics manufactured using the papermaking method can be used.
Examples of dry-laid nonwovens include thermal-bonded nonwovens (e.g., air-through nonwovens, air-laid nonwovens, heat-roll bonded nonwovens, etc.) formed by bonding fibers using adhesives, chemical-bonded nonwovens formed by bonding fiber webs with adhesives, needle-punched nonwovens formed by needling fiber webs with special needles, spunlace nonwovens formed by entangling fibers with a water jet, and flash-spun nonwovens.
Other examples include meltblown nonwoven fabrics using unbound ultrafine fibers, nonwoven fabrics made by laminating meltblown nonwoven fabrics and spunbond nonwoven fabrics, and nonwoven fabrics made by dividing the structure of easily separable fibers. The fiber diameter of the aforementioned ultrafine fibers is preferably 10 μm or less, more preferably 5 μm or less, and particularly preferably 3 μm or less.
Nonwoven fabrics may be treated with processing (such as embossing).

The thickness of the sheet substrate (measured at a load of 8 g/ ^cm² ) is not particularly limited, but is preferably 0.1 to 5 mm, more preferably 0.5 to 1 mm. A thickness of 0.1 mm or more allows it to hold a sufficient amount of liquid deodorant composition to provide a high deodorizing effect. A thickness of 5 mm or less suppresses wetting of textile products caused by the sheet substrate remaining saturated with liquid deodorant composition and moisture in the dryer.

The basis weight of the sheet substrate is not particularly limited, but is preferably 10 to 100 g/ ^m² , and more preferably 20 to 80 g/ ^m² .

The sheet substrate may be single-layer or laminated.
An example of a laminated sheet is one in which a sheet of PE/PP core-sheath type fibers is sandwiched between sheets of rayon fibers.
Laminated sheets can be manufactured, for example, by heat-sealing PE/PP core-sheath type fibers (e.g., NBF-H, manufactured by Daiwabo Polytech Co., Ltd.) to form a sheet (nonwoven fabric), sandwiching this sheet between rayon fiber webs, and entangling the fibers with a water jet.
Commercially available laminated sheets may be used. Examples of commercially available products include (a) to (d) below (all manufactured by Daiwabo Polytech Co., Ltd.).

(a) Rayon / PP/PE core-sheath type fiber / Rayon Basis weight: (20 g/ ^m² ) / (20 g/ ^m² ) / (20 g/ ^m² ) (Total 60 g/ ^m² )
Mass ratio of hydrophilic fibers to hydrophobic fibers: 67/33

(b) Rayon/PP/Rayon Basis weight: (20g/ ^m² )/(20g/ ^m² )/(20g/ ^m² ) (Total 60g/ ^m² )
Mass ratio of hydrophilic fibers to hydrophobic fibers: 57/43

(c) Rayon / PE/PET core-sheath type fiber / Rayon Basis weight: (20 g/ ^m² ) / (20 g/ ^m² ) / (20 g/ ^m² ) (Total 60 g/ ^m² )
Mass ratio of hydrophilic fibers to hydrophobic fibers: 67/33

(d) Rayon/PP/PE core-sheath type fiber Basis weight: (54g/m ² )/(6g/m ² ) (total 60g/m ² )
Mass ratio of hydrophilic fibers to hydrophobic fibers: 90/10

The area of the sheet substrate is not particularly limited, but is preferably 500 to 3000 ^cm² , more preferably 600 to 2000 ^cm² , and especially preferably 800 to 1500 ^cm² . An area of 500 ^cm² or more allows it to hold a quantity of liquid deodorant composition that provides a high deodorizing effect. An area of 3000 ^cm² or less suppresses wetting of textile products caused by the sheet substrate remaining in the dryer with a large amount of liquid deodorant composition and moisture.

[Method for manufacturing deodorizing sheets]
Deodorizing sheets can be manufactured according to known manufacturing methods for textile treatment sheets for dryers.
There are no special restrictions on the method for producing the liquid deodorant composition; for example, the liquid deodorant composition can be produced by mixing and stirring components (A) to (C) and any other components. In this case, it is preferable to use a stirring device equipped with multiple stirring blades (such as propellers or turbine dispersers) that have high shear force and enable overall mixing of the components.
There are no special restrictions on the manufacturing method of deodorizing sheets; for example, deodorizing sheets can be manufactured by impregnating a sheet substrate with a liquid deodorizing agent composition.
There are no special restrictions on the impregnation method; for example, impregnation can be achieved by (1) dropping or spraying the liquid deodorant composition onto the sheet substrate, or (2) immersing the sheet substrate in the liquid deodorant composition.
The amount of liquid deodorant composition impregnated per sheet substrate (the amount of liquid deodorant composition contained in one deodorant sheet) is preferably 20 to 100 g, more preferably 25 to 60 g, and particularly preferably 30 to 50 g. If the impregnation amount is 20 g or more, a sufficient amount of liquid deodorant composition that provides a high deodorizing effect can be retained within the sheet substrate. If the impregnation amount is 100 g or less, it is possible to suppress the occurrence of wetting of textile products that occurs when the sheet substrate remains containing a large amount of liquid deodorant composition and moisture in the dryer.

[How to use deodorizing sheets]
There are no special restrictions on how to use the deodorizing sheets. By placing the deodorizing sheets together with the textile products into the rotating drum of a dryer and operating the dryer under normal conditions, the textile products can be deodorized.
The types of textile products are not particularly limited and include, for example, dress shirts, T-shirts, polo shirts, blouses, chinos, suits, slacks, skirts, jackets, coats, knitwear, jeans, pajamas, tablecloths, placemats, curtains, cushions, seat cushions, sofas, pillowcases, sheets, bed pads, pillows, futons, bed covers, blankets, mattresses, shoes, toilet mats, bath mats, doormats, carpets, rugs, and carpets.
The materials used in textile products are not particularly limited. Examples of materials include natural fibers such as cotton, wool, and linen; synthetic fibers such as polyester, nylon, and acrylic; semi-synthetic fibers such as acetate; regenerated fibers such as rayon, Tencel, and polynosic; and blends, woven, and knitted products of these various fibers.

The present invention will be described in more detail below with reference to examples, but the present invention is not limited thereto.
In the examples and comparative examples, the content (%) of each component is shown as mass% (on a pure content basis unless otherwise specified).

[(A) Component: Propylene glycol]
The following a-1 was used. a'-1 and a'-2 were used as comparative examples.

a-1: Propylene glycol (Chuo Chemical Co., Ltd.)
a'-1:2-(2-butoxy)propoxypropanol (butoxypropoxypropanol) (Wako Pure Chemical Industries, Ltd.)
a'-2:3-Methoxy-3-methyl-1-butanol (Kuraray Co., Ltd.)

[Component (B): fragrance composition]
Fragrance compositions b-1 to b-3 having the compositions shown in the table below were used. The content values in the table represent the content (mass %) relative to the total mass of the fragrance composition.
Furthermore, the "Content (mass%) of fragrances with a ClogP value of 3 or higher" in the table represents the ratio of the total mass of fragrances with a ClogP value of 3 or higher to the total mass of the fragrance composition.

[(C) Ingredient: Nonionic surfactant]

c-1: Polyoxyethylene hydrogenated castor oil (40EO) (Aoki Oil & Fat Co., Ltd.).
The average number of moles of EO (ethylene oxide) added to c-1 is 40 moles.

[Component (D): Semipolar surfactant]
The following d-1 to d-2 were used.

d-1: Lauric acid amidopropyl dimethylamine oxide (APAX) (Lion Specialty Chemicals Co., Ltd.)
d-2: Lauryldimethylamine oxide (AX) (Lion Specialty Chemicals Co., Ltd.)

[Preservatives]
The following two types were used.

Sodium benzoate (Fushimi Pharmaceutical Co., Ltd.)
Methylparaben (Clariant Japan Co., Ltd.)

[Preparation of liquid deodorant composition]
A liquid deodorant composition having the composition shown in Table 1 below was prepared.
The content values in the table represent the content (mass %) relative to the total mass of the liquid deodorant composition.
In all liquid deodorant compositions, the sodium benzoate content was 0.3% by mass relative to the total mass of the liquid deodorant composition.
In all liquid deodorant compositions, the methylparaben content was 0.15% by mass relative to the total mass of the liquid deodorant composition.
The liquid deodorant composition was prepared by dissolving components (A) to (D) and a preservative in deionized water for balancing, and adding hydrochloric acid or sodium hydroxide as appropriate to adjust the pH to 7.

[Sheet base material]
A three-layer laminated sheet (rayon/PP/PE core-sheath type fiber/rayon) was used.
Basis weight: (20g/m ² )/(20g/m ² )/(20g/m ² ) (total 60g/m ² )
Mass ratio of hydrophilic fibers to hydrophobic fibers: 67/33
Size: 30cm x 30cm

[Preparation of deodorizing sheets]
A deodorizing sheet was prepared by placing a sheet substrate into a small bag containing a liquid deodorizing agent composition and impregnating the sheet substrate with the liquid deodorizing agent composition.
The amount of liquid deodorant composition impregnated per sheet substrate (amount of liquid deodorant composition contained in one deodorant sheet) was 35 g.

[Stability of liquid deodorant composition]
A 40g sample of the liquid deodorant composition was placed in a lightweight glass bottle (PS-No. 11, manufactured by Tanuma Glass Industry Co., Ltd.) and sealed tightly to serve as the evaluation sample. The evaluation sample was stored at -5°C for one day. The appearance of the liquid deodorant composition after storage was visually evaluated according to the evaluation criteria below. The results are shown in the "Stability of Liquid Deodorant Composition" column of Table 1. From a commercial value perspective, a ○ was judged to be acceptable.

<Evaluation Criteria>
○: Uniformly transparent ×: Turbidity or sedimentation present

[Deodorizing properties of deodorizing sheets]
1. Preparation of evaluation fabric Two pieces of wool serge fabric (Tanigashira Shoten, 100% wool, 10cm x 15cm) were hung from the top inside a cardboard box (50cm x 30cm x 50cm). One lit cigarette (Mild Seven) was placed at the bottom of the box, and the box was sealed and left for 5 minutes. After extinguishing the cigarette, the box was sealed and left for another 5 minutes. The two pieces of fabric, which had been confirmed to have a sufficient tobacco odor, were sewn onto a towel (Toshin, 100% cotton) to be used as evaluation fabric.
2. Evaluation of Deodorizing Performance The evaluation cloth and deodorizing sheet were placed in a drum-type washing machine and dryer (product name: BW-DV100B, manufactured by Hitachi) and subjected to a drying process (15 minutes). After removing the evaluation cloth from the dryer, it was hung on a hanger and left for 5 minutes to remove the initial heat. After that, the odor of the treated cloth was sensory evaluated according to the evaluation criteria below. The evaluation was conducted by four expert panelists. The average score of the four panelists (calculated to one decimal place) was used to make a judgment according to the judgment criteria below. The results are shown in the "Deodorizing Performance" column of Table 1. In terms of commercial value, ○ or ◎ was judged to be acceptable.

<Evaluation Criteria>
4 points: Strong odor (same odor as before deodorizing treatment)
3 points: Easily detectable odor 2 points: Weak odor that can be identified 1 point: Barely detectable odor 0 points: Odorless

<Judgment criteria>
◎: 0 points ○: More than 0 points but less than 2.0 points △: 2.0 points or more but less than 3.0 points ×: 3.0 points or more

[Odor from deodorizing sheets]
The intensity of the odor (solvent-derived odor) of the adjusted deodorizing sheets was evaluated sensorily according to the evaluation criteria below. The evaluation was conducted by four expert panelists. The average score of the four panelists (calculated to one decimal place) was used to determine the rating according to the judgment criteria below. The results are shown in the "Odor of Deodorizing Sheets" column of Table 1. From a commercial value perspective, ○ was judged as passing.

<Evaluation Criteria>
4 points: Strong odor 3 points: Easily detectable odor 2 points: Weak odor that can be identified 1 point: Barely detectable odor 0 points: Odorless

<Judgment criteria>
○: Less than 1.0 points △: 1.0 points or more and less than 2.0 points ×: 2.0 points or more

This invention is applicable in the field of textile product treatment agents.

Claims (8)

There are deodorizing sheets for textile products that can be used in dryers.
The deodorizing sheet comprises a liquid deodorizing agent composition and a sheet base material.
The liquid deodorant composition comprises (A) propylene glycol, (B) a fragrance composition, and (C) a nonionic surfactant.
(B) In component (B), the content of fragrance components having a ClogP value of 3 or more and 8 or less is 40% by mass or more and 85% by mass or less relative to the total mass of the fragrance composition.
(B) The content of component is 0.005 to 0.1% by mass relative to the total mass of the liquid deodorant composition.
(C) The content of component is 0.1 to 0.6% by mass relative to the total mass of the liquid deodorant composition.
A sheet characterized by the following features. The sheet according to claim 1, wherein the content of component (A) is 2 to 20% by mass relative to the total mass of the liquid deodorant composition. The sheet according to claim 1 or 2, wherein the fragrance component having a ClogP value of 3 or higher is selected from the group consisting of Tonalid, Galaxolid benzyl benzoate 50% solution, Iso-E Super, Hexyl salicylate, Sedlumber, Limonene, Hexyl cinnamic aldehyde, Ambroxan, Citronellyl acetate, p-t-butylcyclohexyl acetate, Geranyl acetate, Habanolide, Allylcyclohexyl propionate, β-Damascone, Beldox, Linalyl acetate, α-Damascone, Damascenone, Ethyl linalool, Lilial, Citronellol, Thymol, Dihydromyrcenolate, Citral, Floropal, Linalool, Flutate, Liral, 1,8-Cineole, and Allylheptanoate. The sheet according to any one of claims 1 to 3, wherein component (C) is a polyoxyalkylene-added nonionic surfactant. The sheet according to any one of claims 1 to 4, wherein the liquid deodorant composition further comprises (D) a semipolar surfactant. The sheet according to claim 5, wherein component (D) is an amine oxide type surfactant. The sheet according to claim 5 or 6, wherein the content of component (D) is 0.1 to 5% by mass relative to the total mass of the liquid deodorant composition. A method for deodorizing textile products in a dryer,
A method comprising the step of subjecting a textile product to a drying treatment in a rotating tank of a dryer together with a deodorizing sheet according to any one of claims 1 to 7.