JP2001254097A - Article for washing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide articles for washing which excel in durability of fragrance and detergency, inhibition of discoloration and generation of insolubles, and storage stability and are easy to handle. SOLUTION: The articles for washing are obtained by vacuum packaging a surface active agent-containing composition in a water-soluble material in separate packets.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laundry article packaged and packaged with a water-soluble material.

[0002]

2. Description of the Related Art There is known a one-pack detergent in which a single washing detergent is packaged and packaged with a water-soluble film or the like in consideration of consumer convenience (Japanese Patent Application Laid-Open No. 63-12467).

However, in the prior art, no consideration has been given to the gas to be filled simultaneously with the detergent composition and no consideration has been given to the gas permeability of the film, even though consideration has been given to the solubility of the film. For this reason, for example, there was a problem in storage stability such as generation of an insolubilized substance due to reaction with carbon dioxide simultaneously filled (or permeated through the film) and oxidation or discoloration of the detergent composition by oxygen.

On the other hand, Japanese Patent Application Laid-Open No.
JP-A-226600 describes that a powder detergent is packaged in a compressed form in a gas- and / or vapor-tight foil, but the packaging material does not take into account any solubility, and it is difficult to use It is necessary to open and put in the detergent that is the contents,
Poor convenience.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a laundry article which has a long-lasting detergency, suppresses the generation of water-insoluble matters, and has excellent storage stability of a detergent composition.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a laundry article obtained by packaging a surfactant-containing composition with a water-soluble material under reduced pressure.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, reduced pressure packaging is
This is a packaging form in which the package is hermetically sealed under reduced pressure by a vacuum packaging machine or the like. Nozzle type, chamber type,
There are a nozzle chamber type, a vacuum contact type, a deep drawing type and the like. Any of the laundry articles of the present invention can be used.

<Water-soluble material> In the present invention, the term "water-soluble" means that the compound is dissolved in water at a temperature of 40 ° C or lower, and more preferably, is dissolved in water at a temperature of 10 ° C or lower. Here, to dissolve, put 1 L of distilled water at a predetermined temperature into a cylindrical 1 L beaker having an inner diameter of 105 mm, and stirrer having a total length of 35 mm and a maximum diameter of 7.5 mm (model SA-35 manufactured by Kagaku Kyoeisha Co., Ltd.). Stirring at 550 r / min using the preferred example)
After charging the packaging material (3 cm × 3 cm, 4 sheets) and continuing stirring for 8 minutes, the residue when passing through a sieve having an aperture of 125 μm is 5% by weight or less, preferably 5% by weight of the charged material. 2% by weight or less.

[0009] The water-soluble material used in the present invention is a storage-friendly material.
Low gas permeability of carbon dioxide, oxygen gas, etc. from qualitative point
Are preferred. 100cc as carbon dioxide gas permeability
/ M ^Two・ 24hrs ・ atm or less (25 ℃, 50% R
H, measured by ASTM D1434-69)
No, 50cc / m^Two・ 24hrs ・ atm or less is better
10cc / m^Two・ 24hrs ・ atm or less
Preferred. The oxygen gas permeability is 100 cc / m
^Two・ 24hrs ・ atm or less (25 ° C, 50% RH, A
STM D1434-69), preferably 5
0cc / m^Two・ 24hrs ・ atm or less is more preferable
10cc / m^Two・ 24hrs ・ atm or less is better
Good. And, in the present invention, airtightness is maintained even after vacuum packaging.
It is desirable to select a water-soluble material to maintain.

The water-soluble material is preferably a modified polyvinyl alcohol (hereinafter referred to as "PVA")-based material. In order to prevent deterioration of solubility in water under the influence of the detergent components contained therein, the modified PVA has a saponification degree of 96. Mol% or more is preferable,
98 mol% or more is more preferable.

As the type of the modified PVA, a saponification degree of 96
Molar% or more can be used as a water-soluble one. In view of cold water solubility and alkali resistance, anion-modified and cation-modified PV
A is preferable, and an anion-modified PVA such as carboxylic acid-modified or sulfonic acid-modified is more preferable.
A is more preferred.

The modification rate of the modified PVA is preferably such that the content of the modified units is 0.1 to 10 mol%, more preferably 0.5 to 8 mol%, and further preferably 1 to 4 mol%. The solubility is preferably 0.1 mol% or more in terms of solubility in water, and is preferably 10 mol% or less in order to prevent the formation of a gel-like substance when poured into water to prevent a decrease in solubility.

The average degree of polymerization of the modified PVA is 2 in terms of solubility.
50-3000 is preferable, and 500-2500 is more preferable.

The water-soluble material may be a plasticizer or a plasticizer to improve processability, flexibility, hydrophilicity in dissolving in water, prevention of blocking during storage of the material, prevention of blocking during storage of laundry articles, and the like. It is preferable to contain a surfactant. As the plasticizer, polyhydric alcohol plasticizers such as ethylene glycol, propylene glycol, and glycerin are preferable, and glycerin is more preferable. As a surfactant,
Anionic, cationic and nonionic surfactants are preferred.

In addition, workability, feel when touched, solubility,
In order to improve the prevention of blocking during storage of the material, the prevention of blocking during storage of the laundry article, and the like, it is preferable that the water-soluble material is provided with lattice-like or turtle-like irregularities by embossing or the like.

In order to improve the feel when touched and to prevent blocking during storage of the laundry article, it is preferable to laminate a water-soluble fiber with a web or nonwoven fabric made of a water-soluble fiber. Webs are more preferred in that respect.
Water-soluble nonwoven fabrics are disclosed in JP-A-8-3848 and JP-A-8-848.
It can be prepared according to Japanese Patent No. 127919 or the like. The water-soluble web is a low-temperature water-soluble PV described in JP-A-8-118559.
A-based fibers are preferred. Since these do not come into direct contact with the detergent composition, unlike water-soluble materials, they preferably have a low degree of saponification, and more preferably have a degree of saponification of 70 to 96 mol%.

Other methods for improving the feel when touched and the prevention of blocking during storage of laundry articles are as follows.
It is preferable to immobilize the water-insoluble material on the surface of the water-soluble material. Here, the term “water-insoluble” means that the solubility of 1 part by weight of a sample in 99 parts by weight of distilled water at 25 ° C. is 5%.
The content is 0% by weight or less, preferably 40% by weight or less. The solubility was determined by filtering the aqueous solution with filter paper (No. 2).
It is calculated from the solid content in the filtrate.

The water-insoluble material is preferably a true sphere, a substantially sphere, a flat plate, a rod, or a fibrous material, and may be a deformed shape obtained by pulverization or the like, or a hollow or porous particle. Further, two or more water-insoluble materials may be used. The use of a mixture of two or more types improves the feel when touched and the prevention of blocking during storage of the laundry article.

The amount of the water-insoluble material is preferably from 0.1 to 80 parts by weight, more preferably from 0.3 to 70 parts by weight, based on 100 parts by weight of the water-soluble material.
Parts by weight are more preferred. The amount of immobilization is 3 to 80.
preferably ^{g / m 2, 5~50g / m} 2 is more preferable.

When the water-insoluble material is in the form of a powder, the average particle size is preferably 500 μm or less, more preferably 300 μm or less, from the viewpoint of feeling when touched, preventing blocking during storage of the laundry article, and preventing falling off of the water-insoluble material. preferable. Further, when the water-insoluble material is in a fibrous form, the fiber length is preferably from 10 μm to 6 mm, more preferably from 20 μm to 5 mm, from the same effect.

Examples of the water-insoluble material include inorganic substances such as zeolite, bentonite, talc, mica, kaolin, sepiolite, silica, silicone, calcium carbonate, titanium oxide, silicic anhydride, hydroxycalcium apatite, and pearl. talc,
Mica, kaolin, silica and silicone are preferred. Other than polyethylene, polypropylene, polyamide, polyethylene terephthalate, polystyrene and polyurethane and / or their cross-linked products, poly (meth) acrylate and poly (meth) acrylate and / or their cross-linked products, etc. Rubber, propylene rubber, styrene-butadiene rubber, butadiene rubber, silicone rubber and other rubbers and / or synthetic polymers such as cross-linked products thereof, cellulose and / or derivatives thereof, chitosan and / or derivatives thereof, starch, fruit shells And organic substances such as natural polymers and / or derivatives thereof, and polyethylene, polyamide, polystyrene, poly (meth) acrylate, poly (meth) acrylate, cellulose and / or derivatives thereof, and starch are preferable.

The thickness of the water-soluble material used in the present invention is 1
0 to 50 μm is preferable, 15 to 40 μm is more preferable, and 20 to 35 μm is further preferable. 10 μm or more is preferable in terms of strength and gas permeability, and 50 μm is preferable in terms of solubility.
m or less is preferable.

<Surfactant-Containing Composition> The surfactant-containing composition of the present invention is a composition containing a surfactant, and is a fiber such as a detergent composition, a bleaching composition and a softener composition. And a composition for treating a product.

[0024] Among the surfactant-containing compositions, the detergent composition may contain 4 to 50% by weight of a surfactant in the composition.
Those containing 8 to 50% by weight of an alkali agent are preferred.
Further, those containing 10 to 50% by weight of a water-insoluble inorganic substance and 1 to 20% by weight of a water-soluble polymer are preferable.
The amount of the surfactant is more preferably from 5 to 45% by weight,
-50% by weight is particularly preferred. Particularly preferably, the enzyme is contained in the composition in an amount of 0.1 to 5% by weight, more preferably 0.2 to 3% by weight. Examples of enzymes include cellulase,
One or more selected from protease, pectinase, amylase, lipase and dextranase are preferably used.

Examples of the surfactant include an anionic surfactant, a nonionic surfactant, an amphoteric surfactant, a cationic surfactant and the like.

Examples of the anionic surfactant include a sulfate of a higher alcohol, a sulfate of an ethoxylated higher alcohol, an alkylbenzene sulfonate,
Examples thereof include a paraffin sulfonate, an α-olefin sulfonate, an α-sulfofatty acid salt or an ester salt thereof, and a fatty acid salt. In particular, when the carbon number of the alkyl chain is 1
0 to 18, preferably 12 to 14 linear alkylbenzene sulfonates, α-sulfofatty acids (10 to 2 carbon atoms)
0) Alkyl ester salts are preferred. Examples of the counter ion include an alkali metal, an alkaline earth metal, ammonia, and an alkanolamine. From the viewpoint of adjusting the dissolution rate, it is also preferable to use potassium ions in combination. The potassium ion in all the counter ions is preferably 5% by weight or more, more preferably 20% by weight or more, and particularly preferably 40% by weight or more.

Examples of the nonionic surfactant include an ethylene oxide (hereinafter referred to as “EO”) adduct of a higher alcohol, or EO / propylene oxide (hereinafter referred to as “PO”).
Adducts), fatty acid alkanolamides, alkyl polyglycosides and the like. Particularly, the carbon number is 10 to 1
An alcohol adduct of 1 to 10 mol of EO of alcohol 6 is preferred in terms of removing sebum stains, hard water resistance, biodegradability, and compatibility with linear alkylbenzene sulfonates.

As the water-insoluble inorganic substance, those having an average primary particle size of 0.1 to 20 μm are preferable, such as crystalline or amorphous aluminosilicate, silicon dioxide, hydrated silicate, perlite, bentonite and the like. And the like. Of these, crystalline aluminosilicates are preferred in terms of sequestering ability and oil absorbing ability of a surfactant.

Examples of the water-soluble polymer include carboxylic acid polymers, carboxymethyl cellulose, soluble starch, and saccharides. Among them, a carboxylic acid-based polymer having a molecular weight of several thousands to 100,000 is preferred from the viewpoint of sequestering ability of metal ions, dispersing ability of solid dirt / particle dirt, and ability of preventing re-contamination. Particularly, a salt of an acrylic acid-maleic acid copolymer and a polyacrylate are preferred. Here, the salt includes a sodium salt, a potassium salt, and an ammonium salt.

The detergent composition includes a builder, a bleaching agent (percarbonate, perborate, a bleaching activator, etc.), a redeposition inhibitor (carboxymethylcellulose, etc.), a softener, Reducing agents (sulfites, etc.), optical brighteners,
A foam inhibitor (such as silicone), a fragrance and the like can be contained.

One form of the detergent composition is in the form of a powder,
The bulk density is preferably 500 to 1200 g / L, more preferably 600 to 1000 g / L, and particularly preferably 650.
850 g / L. The bulk density is 5 from the viewpoint of economic efficiency.
00g / L or more is preferable, and 1200
g / L or less is preferable. The average particle size of the detergent composition is preferably 150 to 800 μm, more preferably 25 to 800 μm.
It is 0 to 750 μm, particularly preferably 300 to 700 μm. The thickness is preferably 150 μm or more from the viewpoint of preventing the formation of paste, and is preferably 800 μm or less from the viewpoint of solubility. The water content of the detergent composition is 10% by weight from the viewpoint of quality.
Or less, more preferably 8% by weight or less.

The production of such a detergent composition is described in
-69897, JP-A-61-69899,
JP-A-61-69900, JP-A-5-20920
No. 0 and DE19529298 can be used. As a method for obtaining a detergent having a higher bulk density, the invention described in WO9526394 can be referred to. To further illustrate, the main component excluding a part of the water-insoluble inorganic material is kneaded and mixed using a continuous kneader, and the obtained kneaded material and the remaining water-insoluble inorganic material are put into a pulverizer and pulverized. Can be obtained. Then, the obtained detergent composition is sieved to obtain a detergent composition having a predetermined average particle size distribution. In addition, as a continuous kneader, for example,
Preferred examples are KRC2 type manufactured by Kurimoto Iron Works and DKASO6 type manufactured by Hosokawa Micron as a crusher. Further, as another method, for example, it can be obtained by slurrying the main component excluding a part of the water-insoluble inorganic substance and the like, and granulating the slurry with particles obtained by spray drying and a binder substance. .

By sieving the obtained detergent composition, and optionally pulverizing it, a detergent composition having a predetermined average particle size distribution can be obtained.

From the viewpoint of the fluidity and non-caking properties of the detergent composition, the surface modification may be further performed by mixing the high bulk density detergent composition of the present embodiment with a surface coating agent.

Examples of the surface coating agent include silicate compounds such as aluminosilicate, calcium silicate, silicon dioxide, bentonite, talc, clay, amorphous silica derivatives and crystalline silicate compounds, metal soaps, and powder surfactants. Powder, carboxymethyl cellulose,
Water-soluble polymers such as polyethylene glycol, sodium polyacrylate, polycarboxylates such as copolymers of acrylic acid and maleic acid or salts thereof, and fatty acids.

<Laundry Article> The laundry article of the present invention is obtained by packaging the surfactant-containing composition in a water-soluble material under reduced pressure, and packaging the amount to be used per washing. Is preferred in terms of convenience. In the case of a packaged packaging detergent, it is preferably 10 to 100 g per packaged product, and 15 to 5 g.
0 g is more preferred.

The shape may be substantially spherical, substantially tetrahedral, substantially cubic, substantially plate-like, or the like, but is preferably substantially cubic or substantially plate-like in terms of the efficiency of filling into a box or the like, and in terms of solubility. A substantially plate shape is more preferable. In the case of divided packaging detergent, the thickness is 2 to 20
mm is preferable, and 2 to 10 mm is more preferable.

Since the laundry article of the present invention exhibits excellent water solubility as a whole, it can be put into washing water as it is. In this respect, it is distinguished from the package described in JP-A-4-226600.

[0039]

EXAMPLES <Preparation of Detergent Composition 1> Detergent composition 1 was produced as follows. From the composition shown in Table 1, 3% by weight of a nonionic surfactant, based on the weight in the total detergent composition,
Spray-dried particles are prepared by preparing a 50% by weight solids slurry from components excluding 5% by weight of crystalline silicate, 10% by weight of zeolite, 0.2% by weight of fragrance, and 1.3% by weight of enzyme, and spray drying. I got Then, this was put into a high-speed mixer (manufactured by Fukae Kogyo Co., Ltd.) together with 5% by weight of crystalline silicate in the whole detergent composition, and the remaining 3 parts were added.
The mixture was pulverized while spraying a weight% of a nonionic surfactant to perform stirring granulation. After granulation, 5% by weight of zeolite was added to the total detergent composition, and the mixture was stirred to coat the surface of the granulated particles. Then, the mixture was transferred to a V blender, and the remaining zeolite was mixed, and 1.3% by weight of enzyme and fragrance were added. The detergent composition 1 was obtained by mixing 0.2% by weight. Table 1 shows the physical properties of Detergent Composition 1.
The average particle diameter and the bulk density are measured by the following methods.

[Average Particle Size] After oscillating for 5 minutes using a standard sieve according to JIS Z 8801, the average particle size was determined from the weight fraction based on the size of the sieve.

[Bulk density] The bulk density was measured by the method specified in JIS K 3362.

<Preparation of Detergent Composition 2> Detergent composition 2 was produced as follows. First, LAS-K 13% by weight, AOS-K 15% by weight, polyoxyethylene alkyl ether 5% by weight, based on the weight in the detergent composition in Table 1.
Polyethylene glycol 1% by weight, zeolite 15% by weight, acrylic acid-maleic acid copolymer 1% by weight, fatty acid sodium 4% by weight, No. 1 sodium silicate 5% by weight, potassium carbonate 8% by weight, sodium sulfate 2% by weight,
1% by weight of sodium sulfite and 0.3% by weight of fluorescent dye
Was prepared and spray dried to obtain a spray-dried composition. To this, 14% by weight of sodium carbonate based on the weight in the detergent composition was charged into a ribbon mixer and mixed. The obtained mixture was extruded into a cylindrical shape having a diameter of 10 mm by a pre-extrusion type twin-screw extrusion granulator (pelleter double: manufactured by Fuji Paudal Co., Ltd.) and compacted. The obtained pellets were pulverized and granulated with a flash mill (manufactured by Fuji Paudal Co., Ltd.) together with 5% by weight of zeolite in the total detergent composition to perform surface coating. After removing coarse substances from the granules, the granules were transferred to a V blender, the remaining zeolite was mixed, and 1.3% by weight of an enzyme and 0.2% by weight of a fragrance were mixed to obtain a detergent composition 2.
Table 1 shows the physical properties of the detergent composition 2 measured in the same manner as described above.

[0043]

[Table 1]

Here, LAS-Na has 12 to 14 carbon atoms.
LAS-K is a potassium alkylbenzene sulfonate having an alkyl group having 12 to 14 carbon atoms, AOS-
K is potassium α-olefin (14-18 carbon atoms) sulfonate, and AS-Na is sodium alkyl sulfate having an alkyl group having 12-16 carbon atoms. The crystalline silicate was obtained by pulverizing powder SKS-6 (manufactured by Clariant Tokuyama Co., Ltd.) to have an average particle size of 50 μm. 4
A-type zeolite has an average particle size of 3 μm (Tosoh Corporation)
Manufactured). The acrylic acid-maleic acid copolymer was a sodium salt (70 mol% neutralized), and the monomer ratio used was acrylic acid / maleic acid = 7/3 (molar ratio). The fluorescent dyes are Tinopearl CBS-X and Tinopearl AM
S-GX (manufactured by Ciba Specialty Chemicals):
The mixture obtained in Step 1 was used. The enzyme used was a mixture of cellulase K (described in JP-A-63-264699) and Lipolase 100T (manufactured by Novo) at a weight ratio of 3: 1.

<Preparation of water-soluble material> Maleic acid-modified PV
A (T-330, manufactured by Nippon Synthetic Chemical Industry, modification ratio 2 mol%, saponification degree 96%) 1500 g, water 8500 g, glycerin as plasticizer (Wako Pure Chemical Industries) 300 g, emulgen 135 (non-ionic (Surfactant, manufactured by Kao) 15 g is dissolved and defoamed, and then dried with hot air at 140 ° C. (drying time: 2 minutes) while casting on a drum at 120 ° C. to obtain a long water-soluble material having a thickness of 30 μm. I got

<Composite 1 of Water-Soluble Material> While unwinding the water-soluble material obtained above, a gravure coater (gravure roll 200 mesh, manufactured by Hirano Lecceed) was used to unwind 7/7 of titanium oxide / calcium carbonate. 3 mixture (average particle size 3μm)
Was dispersed in an aqueous solution of polyvinylpyrrolidone and coated with stirring. Subsequently, hot air drying was performed at 110 ° C. for 20 seconds. Thereby, the water-soluble material was composited, and a composite material 1 was obtained. The composite amount was 2.5 g / m ² .

<Composite 2 of Water-Soluble Material> A PVA fiber having a saponification degree of 88 mol% and a polymerization degree of 1700 was crimped and cut to obtain a 2 denier × 51 mm stable, which was spread to obtain a basis weight of 20 g. / M ² . The web is superimposed on the water-soluble material obtained above, and the embossing roller having a deformed square pattern having a compression area ratio of 25% and a side of 2 mm is set to 120.
° C and composited by thermocompression bonding at a linear pressure of 30 kg / cm to obtain a composite material 2. The grammage was 46 g / m ² .

<Example 1> Using the composite material 1, 25 g of the detergent composition 1 was sealed under reduced pressure, and was about 5 cm long and about 8 cm wide.
An approximately plate-shaped laundry article having a thickness of 8 mm and a thickness of 8 mm was obtained. This laundry article was left in a thermo-hygrostat at 30 ° C. and 80% RH for 90 days. After the test, the detergent composition inside was carefully taken out, and the flavor and color were compared and observed before storage. Further, the detergency and water-insoluble matter of the detergent composition after storage were evaluated by the following methods. The results are shown in Table 2. [Method of Measuring Detergency] First, JP-A-10-168485
According to the method described in Japanese Patent Publication No. 14, column 6, line 6, an artificially stained cloth was prepared. Next, 10 cm was added to 1 L of the aqueous detergent solution for evaluation.
Five artificial soiled cloths of × 10 cm were put and washed at 100 rpm with a tergotometer (washing conditions: washing time: 5 minutes, detergent concentration: 0.0667% by weight, water hardness: 4 ° DH,
Water temperature 20 ° C, rinse with tap water for 5 minutes. ).

The detergency was measured by measuring the reflectance at 550 nm of the original cloth before and before and after the cleaning with a self-recording colorimeter (manufactured by Shimadzu Corporation), and the cleaning rate (%) was determined by the following equation.
The measured average value of five sheets was evaluated as detergency.

[0050]

(Equation 1)

：: Cleaning rate of 60% or more Δ: Cleaning rate of 55% or more and less than 60% X: Cleaning rate of less than 55%.

[Measurement method of water-insoluble matter] 1 L of distilled water at 10 ° C. was placed in a cylindrical 1 L beaker having an inner diameter of 105 mm, and a cylindrical stirrer having a total length of 35 mm and a diameter of 7.5 mm (manufactured by Kagaku Kyoeisha, Model SA-35) 550 rp using a preferred example)
Stir at m. 1 g of a sample at 10 ° C. is accurately measured and placed in the center of the vortex of water, and stirred for 10 minutes. Then, the mixture was immediately filtered through a sieve having a mesh size of 75 μm.
Wash through the sieve with 0 mL. Next, the dried residue was measured at 105 ° C. for 2 hours, and the water-insoluble content was calculated and evaluated. Water-insoluble content (%) = [[dry residue weight (g)] / [input sample weight (g)]] × 100 ○: less than 0.5% of water-insoluble content △: 0.5% or more of water-insoluble content 1 %: Water insoluble content: 1% or more <Example 2> A laundry article was obtained and evaluated in the same manner as in Example 1 using the composite material 2 and the detergent composition 2. Table 2 shows the results.

<Comparative Example 1> In Example 1, the detergent composition 2 was used in place of the detergent composition 1, and the same volume of air as the detergent composition was introduced into the package without packaging under reduced pressure. To obtain a laundry article, and evaluated in the same manner as in Example 1. Table 2 shows the results.

<Comparative Example 2> Detergent composition 2 having a basis weight of 550 g
600 g of a paper container (about 9 cm in length, about 15 cm in width, about 10 cm in height) in which the paper surface of / cm ² was laminated with polyethylene was stored and evaluated in the same manner as in Example 1. Table 2 shows the results.

[0055]

[Table 2]

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4H003 AB03 AB15 AB19 AB27 AB44 AC08 BA18 DA01 EA12 EA15 EA16 EA28 EB22 EB32 EB33 EB36 EC01 ED02 FA14 FA16 FA32

Claims (5)

[Claims] 1. A laundry article obtained by packaging a surfactant-containing composition with a water-soluble material under reduced pressure. 2. The laundry article according to claim 1, wherein a water-insoluble material is fixed on a surface of the water-soluble material. 3. The laundry article according to claim 1, wherein the water-soluble material is formed by laminating a web or a nonwoven fabric made of water-soluble fibers. 4. The laundry article according to claim 1, wherein the water-soluble material is a modified polyvinyl alcohol having a degree of saponification of 96 mol% or more. 5. The laundry article according to claim 1, which has a substantially plate-like shape.