JP2000186298A - Detergent composition of high bulk density - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a composition which sufficiently reveals detergency even under low-temperature cleaning conditions because of the comparable solubility of both of the particles by blending detergent particles which contain a surfactant and have a specified particle diameter, high bulk density and a specified dissolution time with particles which contain an enzyme and have a specified dissolution time. SOLUTION: The detergent particles used have a 95% dissolution time of at most 90 sec at 10 deg.C as determined by the conductimetric method, a bulk density of at least 500 g/l, and a mean particle diameter of 150-500 μm, with particles having a diameter of 710 μm or larger and those having a diameter below 125 μm each accounting for 10 wt.% of the whole particles. The enzynse- containing particles used have a 95% dissolution time of 60-300 sea. It is desirable to blend 100 pts.wt. of the detergent particles with 0.2-10 pts.wt. of the enzyme-containing particles. The detergent particles preferably have a composition consisting of 5-80 wt.% surfactant, 10-50 wt.% inorganic material hardly soluble in water, and 1-20 wt.% water-soluble polymer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a high bulk density detergent composition.

[0002]

2. Description of the Related Art Granular detergent compositions are strongly directed to higher bulk densities and lower usage amounts from the convenience of consumers. However, it is known that a high bulk density detergent composition tends to have a low dissolution rate of detergent particles constituting the composition. In addition, the recent trends in washing machines, such as lowering the temperature of washing water and shortening the operation time, in response to environmental and energy issues and economics, are all factors that cause a delay in the dissolution rate of detergent particles. The cleaning performance of the detergent composition is significantly reduced.

[0003] On the other hand, an enzyme-containing detergent composition comprising detergent particles and enzyme-containing particles has conventionally been known. In the enzyme-containing detergent composition, in order to sufficiently exert the action of the enzyme on the stain, it is advantageous that the action of a surfactant or the like acts on the stain in advance. However, in conventional enzyme-containing detergent compositions, the enzyme-containing particles usually dissolve first, followed by the detergent particles. In such a state, the enzyme acts on the stain while the action of the surfactant or the like on the stain is insufficient, so that the action of the enzyme cannot be maximized.

[0004] For example, Japanese Patent Publication No. 9-512046,
Japanese Patent Publication No. 9-512048, Japanese Patent Publication No. 9-51229
No. 1 discloses an enzyme-containing detergent composition in which the solubility of the detergent particles and the enzyme-containing particles is made comparable by delaying the release of the enzyme into the cleaning solution, thereby improving the detergency. Have been. However, the idea of delaying the release of the enzyme into the wash solution is contrary to the recent trend described above, and with such a delay,
There is also a practical problem that the washing step is completed before the effect of the enzyme is sufficiently exerted, or particles remain undissolved. Such a phenomenon is particularly noticeable in cleaning at a low water temperature.

[0005]

An object of the present invention is to provide a high bulk density detergent composition containing high bulk density detergent particles having high solubility to the extent that the action of an enzyme can be sufficiently exerted. It is.

[0006]

That is, the gist of the present invention is as follows.
High bulk density detergent particles containing a surfactant and having a 95% dissolution time of 90 seconds or less by an electric conductivity method at 10 ° C and enzyme-containing particles having a 95% dissolution time of 60 to 300 seconds. The present invention relates to a high bulk density detergent composition.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A 95% dissolution time of a surfactant-containing high bulk density detergent particle at 10 ° C. by an electric conductivity method is 90 seconds or less, preferably 80 seconds or less, from the viewpoint of improving the washing ability. More preferably, it is 60 seconds or less. The detergent particles have a bulk density of 500 g / L or more, preferably 500 to 1000 g / L, and more preferably 600 to 1 g / L.
000 g / L, particularly preferably 650-850 g / L. The bulk density is preferably 500 g / L or more from the viewpoint of economic efficiency, and is preferably 1000 g / L or less from the viewpoint of solubility.

[0008] The enzyme-containing particles are usually dissolved in a relatively short time, but the 95% dissolution time of the enzyme-containing particles at 10 ° C by an electric conductivity method is 60 to 300 seconds, preferably 60 to 300 seconds.
It is 210 seconds, more preferably 60 to 120 seconds. The dissolution time is preferably 60 seconds or more from the viewpoint of enhancing the interaction between the detergent particles containing the surfactant and the enzyme-containing particles,
The dissolution time is preferably 300 seconds or less from the viewpoint of shortening the washing time.

The total amount of the high bulk density detergent particles and the enzyme-containing particles in the detergent composition of the present invention is from 50 to 10 in the composition from the viewpoint of sufficiently exerting the action of the surfactant and the enzyme.
0% by weight is preferable, and 70 to 100% by weight is more preferable. The mixing ratio of the two particles is preferably 0.2 to 10 parts by weight, more preferably 0.2 to 5 parts by weight, with respect to 100 parts by weight of the high bulk density detergent particles from the viewpoint of washing ability and economy. preferable. Further, the composition of the present invention may contain, as an optional component, a known component to be added to a general detergent composition.

In the present invention, “95% dissolution time at 10 ° C. by an electric conductivity method” is defined as follows. Pour 1 L of distilled water at 10 ° C. into a cylindrical 1 L beaker having an inner diameter of 105 mm, and set an electric conductivity meter. Total length 3
550 mm using a cylindrical stirrer with a diameter of 5 mm and a diameter of 7.5 mm.
Stir at rpm. A 1 g sample at 10 ° C. is introduced into the center of the water vortex. With this time taken as 0 second, the electrical conductivity is measured at 10 second intervals. A value at which the measured value does not increase continuously for 2 minutes or more is defined as a 100% dissolution value, and a 95% dissolution value is calculated. The time required to reach that value is defined as a 95% dissolution time. The stirrer was manufactured by Kagaku Kyoeisha, Model SA
-35 and the like are preferred examples.

[0011] Such high solubility high bulk density detergent particles include, for example, the following embodiments of high bulk density detergent particles. As one embodiment of the high bulk density detergent particles, the average particle size is 150 to 500 μm, preferably 180 to 500 μm.
m, more preferably 180-300 μm, and 710 μm
The ratio of the particles having a particle size of m or more and the particles having a particle size of less than 125 μm is 10% by weight or less, preferably 8% by weight or less, more preferably 5% by weight or less of the entire high bulk density detergent particles.

Here, from the viewpoint of preventing the dissolution delay due to the formation of the detergent particles into a paste, the average particle size is preferably 150 μm or more and less than 125 μm is 10% by weight or less. From the viewpoint of improving the solubility of the detergent particles themselves, the average particle size is preferably 500 μm or less, and the ratio of particles having a size of 710 μm or more is preferably 10% by weight or less.

[0013] The composition of the high bulk density detergent particles of the present embodiment is as follows: 5-80% by weight of a surfactant and 1% of a poorly water-soluble inorganic substance.
A composition having 0 to 50% by weight and a water-soluble polymer of 1 to 20% by weight is preferable. The amount of the surfactant is more preferably from 10 to 60% by weight, and particularly preferably from 20 to 50% by weight.

The detergent particles can be prepared by a known method, for example,
The main component excluding a part of the poorly water-soluble inorganic material is kneaded and mixed using a continuous kneader, and the obtained kneaded material and the remaining poorly water-soluble inorganic material can be obtained by being charged into a grinder and pulverized. it can. Then, by sieving the obtained detergent particles, detergent particles having a predetermined average particle size distribution can be obtained. Preferred examples of the continuous kneader include KRC2 type manufactured by Kurimoto Iron Works, and DKASO6 type manufactured by Hosokawa Micron as a pulverizer.

[0015] In another embodiment, the high bulk density detergent particles include a base granule containing a poorly water-soluble inorganic substance and at least one water-soluble component selected from the group consisting of a water-soluble polymer and a water-soluble salt. And high bulk density detergent particles carrying the same. The average particle size of the detergent particles is from 150 to 600 μm, preferably 1 from the viewpoint of preventing dissolution delay due to the paste formation of the detergent particles and the solubility of the detergent particles themselves.
50 to 500 μm, more preferably 180 to 400 μm
It is.

In the composition of the base granules, the poorly water-soluble inorganic substance is preferably 20 to 90% by weight, more preferably 30 to 75% by weight.
% By weight, particularly preferably 40 to 70% by weight. The water-soluble polymer is preferably 2 to 30% by weight, more preferably 3 to 20% by weight, particularly preferably 5 to 20% by weight. The content of the water-soluble salts is preferably 5 to 78% by weight, more preferably 10 to 70% by weight, particularly preferably 20 to 60% by weight. Within these ranges, the structure of the base granules obtained by spray-drying the slurry has a structure in which the water-soluble polymer and / or water-soluble salts are more unevenly distributed near the surface than inside the base granules. The base granules exhibiting such uneven distribution exhibit a dissolution behavior in which water-soluble components near the surface are rapidly dissolved in water, thereby accelerating the disintegration of the detergent particles from the surface of the detergent particles. Therefore, such base granules realize fast dissolution,
Detergent particles having excellent solubility can be obtained.

The uneven distribution of the structure of the base granules can be confirmed, for example, by a method using FT-IR or PAS together with Fourier transform infrared spectroscopy (FT-IR / PAS).
Can be performed. This is APPLIED SPECTROS
As described in COPY vol. 47, 1311-1316 (1993), this is a method of analyzing the distribution state of a substance in the depth direction from the surface of a base granule, whereby uneven distribution can be confirmed.

The amount of the surfactant supported on the base granules is preferably 5 to 80 parts by weight, more preferably 5 to 60 parts by weight, more preferably 5 to 60 parts by weight, based on 100 parts by weight of the base granules in terms of detergency. More preferably 20 to 6 parts by weight.
0 parts by weight is particularly preferred. By supporting the anionic surfactant on the base granules, a large amount of surfactant can be blended while maintaining the above uneven distribution.

Such detergent particles can be prepared, for example, as follows. First, a slurry containing the components constituting the base granules is prepared. Next, the slurry is subjected to spray drying to obtain base granules. By spray drying
The water-soluble components of the components constituting the base granules move to the surface of the base granules as the water evaporates. for that reason,
The base granules will be ubiquitous. Next, the obtained base granules and the surfactant are charged into a batch-type or continuous-type well-known mixer to allow the base particles to carry the surfactant.

Further, from the viewpoint of the fluidity and non-caking properties of the detergent particles, the surface modification may be carried out by mixing the high bulk density detergent particles of the present embodiment with a surface coating agent. Examples of the surface coating agent include aluminosilicate, calcium silicate, silicon dioxide, bentonite, talc, clay, an amorphous silica derivative, a silicate compound such as a crystalline silicate compound, a metal soap, a powdered surfactant, and the like. Water-soluble polymers such as fine powder, polycarboxylates such as carboxymethylcellulose, polyethylene glycol, sodium polyacrylate, copolymers of acrylic acid and maleic acid, and salts thereof; and fatty acids.

Next, the components constituting the detergent particles will be described. As the poorly water-soluble inorganic substance, those having an average primary particle diameter of 0.1 to 20 μm are preferable. Specific substances include crystalline or amorphous aluminosilicates, silicon dioxide, hydrated silicate compounds, clay compounds such as perlite and bentonite. 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 a carboxylic acid polymer, 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-staining. 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.

Examples of the water-soluble salts include water-soluble inorganic salts such as carbonates, bicarbonates, sulfates, sulfites, hydrogensulfates, hydrochlorides, phosphates and the like, ammonium salts, and amine salts. Salts and low molecular weight water-soluble organic acid salts such as citrate and fumarate are exemplified. The incorporation of the water-soluble salts allows the bubbles generated from the detergent particles to thermally expand by the heat of hydration and heat of dissolution generated by the reaction between the water-soluble salts and water, thereby promoting the disintegration of the particles. It is more preferable in this respect.

Examples of the surfactant include an anionic surfactant, a nonionic surfactant, an amphoteric surfactant, and a cationic surfactant. Examples of the anionic surfactant include a sulfate of a higher alcohol, a sulfate of an ethoxylated higher alcohol, an alkylbenzene sulfonate, a paraffin sulfonate, an α-olefin sulfonate, an α-sulfofatty acid salt and an alkyl thereof. An ester salt or a fatty acid salt is exemplified. In particular, the alkyl chain has 10 to 18 carbon atoms, preferably 12 carbon atoms.
Preferred are straight-chain alkylbenzene sulfonates having from 14 to 14, and α-sulfofatty acid alkyl ester salts having from 10 to 20 carbon atoms. Examples of the counter ion include an alkali metal, an alkaline earth metal, ammonia, and an alkanolamine.

As the nonionic surfactant, 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.

The detergent particles include builders, bleaching agents (percarbonates, perborates, bleaching activators, etc.), re-staining inhibitors (carboxymethylcellulose, etc.), softening agents, which are known in the field of clothing detergents. , Reducing agents (such as sulfites), optical brighteners,
A foam inhibitor (such as silicone), a fragrance and the like can be contained. The water content of the high bulk density detergent particles is preferably 20% by weight or less, more preferably 10% by weight or less in the detergent particles.

The enzyme-containing particles are enzyme-containing particles containing an enzyme. Examples of the enzyme include protease, amylase, peptinase, lipase, and cellulase, and a combination of protease and cellulase is particularly preferable. The particle size of the enzyme-containing particles is not particularly limited, but is preferably from 100 to 2000 μm as an average particle size, and from 150 to 1 μm.
500 μm is more preferred.

The enzyme-containing particles preferably contain a surfactant from the viewpoints of shape retention and dispersibility. The amount of the surfactant is preferably 0.1 to 20 parts by weight, more preferably 0.2 to 10 parts by weight, based on 100 parts by weight of the enzyme powder.
As the surfactant, those described in the description of the high bulk density detergent particles can be used.

A diluent (eg, a bulking agent, a filler, etc.), a drying accelerator, a buffering agent, and the like for keeping the specific activity of the preparation particles constant can be added to the enzyme-containing particles as needed. Also,
Coloring agents, stabilizers and the like can be used as appropriate, and further, flavoring agents, deodorants, antistatic agents and the like can be used.

The bulk density of the particles is determined according to JIS K 336.
Measure according to the method specified in 2. The average particle diameter of the particles is a median diameter, and the sample is vibrated for 5 minutes using a standard sieve of JIS Z 8801, and is measured from the weight fraction based on the size of the sieve opening.

High bulk density detergent particles having high solubility to the extent specified in the present invention have not been known so far,
Naturally, no method was known for obtaining such detergent particles. However, as described herein,
Detergent particles having high solubility can be obtained by a simple method such as a method of sieving detergent particles obtained by a known method to a predetermined degree or a method of spray-drying a slurry containing a specific component. For this reason, the action of the enzyme can be fully demonstrated from an unconventional approach,
The effect of improving the detergency is exhibited.

[0032]

EXAMPLES Preparation of Base Granules 507 kg of water was added to a 1 m ³ mixing tank having stirring blades. After the water temperature reached 55 ° C., 36 kg of a 50% by weight aqueous solution of sodium dodecylbenzenesulfonate and 75 kg of a 40% by weight aqueous solution of an acrylic acid-maleic acid copolymer (sodium salt) were added. After stirring this for 15 minutes, 150 kg of sodium carbonate and 6 parts of sodium sulfate were added.
0 kg, 9 kg of sodium sulfite and 3 kg of fluorescent dye were added. After stirring this for a further 15 minutes, 300 kg of zeolite were added. This was stirred for 30 minutes to obtain a slurry. The final temperature of this slurry was 60 ° C.

This slurry was supplied to a spray drying tower, and spraying was performed from the top of the tower at a spray pressure of 25 kg / cm ² to prepare base granules. The composition of the obtained base granules is as follows. Sodium dodecylbenzenesulfonate 3% by weight, acrylic acid-maleic acid copolymer (sodium salt) 5% by weight, sodium carbonate 25% by weight, sodium sulfate 10% by weight, sodium sulfite 1.5% by weight, fluorescent dye 0.5% by weight , Zeolite 50% by weight, water 5% by weight.

The acrylic acid-maleic acid copolymer was a sodium salt (70 mol% neutralized), and the monomer ratio was acrylic acid / maleic acid = 3/7 (molar ratio). Whitex SA (manufactured by Sumitomo Chemical Co., Ltd.) as a fluorescent dye
Was used. As the zeolite, a 4A zeolite having an average particle size of 3 μm (manufactured by Tosoh Corporation) was used. Further, as a result of analyzing the base granules by FT-IR / PAS, it was found that the inside of the granules had a high ratio of zeolite, and the water-soluble polymer and water-soluble salts had a coating type particle structure in which a large amount was present near the particle surface. That is, it was confirmed that the base granules had uneven distribution.

Next, a surfactant and the like were added to the base granules to obtain high bulk density detergent particles. That is, 15 parts by weight of a nonionic surfactant, 15 parts by weight of an anionic surfactant, 1 part by weight of polyethylene glycol and 3 parts by weight of water were mixed by heating to obtain a mixed solution at 70 ° C. Next, 100 parts by weight of the base granules were charged into a Lady Demixer (manufactured by Matsuzaka Giken Co., Ltd., capacity: 20 L, with jacket), and the main shaft (1
Stirring at 50 rpm) was started. The mixed solution was charged therein for 3 minutes, and then stirred for 5 minutes to obtain detergent particles. Further, 10 parts by weight of a crystalline silicate and 5 parts by weight of an amorphous aluminosilicate were charged into the mixer to coat the surface of the detergent particles.

The nonionic surfactant has 12 carbon atoms.
-16, polyoxyethylene alkyl ether having an average number of moles of added EO of 7.0 was used. As the anionic surfactant, sodium dodecylbenzenesulfonate was used. Polyethylene glycol having an average molecular weight of 8,500 was used. As the crystalline silicate, powder SKS-6 (produced by Hoechst Tokuyama Co., Ltd.) was pulverized to have an average particle size of 50 μm. Amorphous aluminosilicate has Al ₂ O ₃ = 2
9.6% by weight, SiO ₂ = 52.4% by weight, Na ₂ O =
18.0% by weight (1.0Na ₂ O · Al ₂ O ₂ · 3.1
0SiO ₂ ) (by atomic absorption analysis and plasma emission analysis). Further, its Ca ion capturing ability is 185 CaCO ₃ mg / g, and its oil absorbing ability is 285 mL / g.
100 g, and the water content was 11.2% by weight.

Next, the detergent particles were classified using a sieve having a mesh size of 2000 μm to obtain detergent particles having a particle size of less than 2000 μm. Table 1 shows the physical properties of the obtained detergent particles.

[0038]

[Table 1]

As shown in Table 1, the dissolving time of the obtained detergent particles was extremely short, and was substantially the same as that of the enzyme-containing particles. In addition, quality such as fluidity was improved.

Preparation of Enzyme-Containing Particles An aqueous solution (enzyme powder: 7.5) containing a crude enzyme (derived from Bacillus sp.) Having protease activity and cellulase activity.
% By weight) of sodium lauryl sulfate was added so as to be 10 parts by weight with respect to 100 parts by weight of the enzyme powder in the aqueous solution to prepare an enzyme aqueous solution.

The enzyme aqueous solution was spray-dried at a hot air temperature of 150 ° C. and an exhaust air temperature of 75 ° C. to obtain a powdered enzyme preparation (particle size: 10 to 5).
0 μm). Next, granulation was performed using a high-speed mixer (FS-5, manufactured by Fukae Kogyo Co., Ltd.) to prepare enzyme-containing particles. The 95% dissolution time of the obtained enzyme-containing particles at 10 ° C. by an electric conductivity method was 72 seconds.
The composition of the enzyme-containing particles is as follows. 5. 18 parts by weight of powdered enzyme preparation, 55 parts by weight of nuclear material, binder
5 parts by weight, 2 parts by weight of titanium oxide, sodium sulfate
5 parts by weight. The nuclear material is one particle having a particle diameter of 500 μm or less.
1% by weight, including 9% by weight of particles having a particle diameter of 700 μ or more,
Sodium chloride having an average particle size of 610 μm was used. As the binder, polyethylene glycol 6000 (manufactured by Kao Corporation) was used.

To 100 parts by weight of the obtained detergent particles, 0.5 part by weight of the enzyme-containing particles and 0.5 part by weight of a fragrance were mixed to obtain a high bulk density detergent composition. Detergency tests were conducted on the high bulk density detergent composition of the present invention and a commercially available high bulk density detergent composition containing enzyme-containing particles. Commercially available high bulk density detergent compositions include Super Top (Lon Co., Ltd.).
t.No.98.03-04C3A, bulk density of 810 g / L, average particle size of detergent particles of 562 μm, less than 125 μm.
5% by weight, particles having a particle size of 710 μm or more are 31.3% by weight.
% Dissolution time was 217 seconds). 10 of enzyme-containing particles
The 95% dissolution time at 90 ° C. by the electrical conductivity method was 90 seconds.

[Method of Detergency Measurement] <Preparation of Artificial Soiled Cloth> The method described in JP-A-10-168485, column 14, line 6, was used. <Cleaning Conditions and Evaluation Method> Five artificially stained cloths of 10 cm × 10 cm were put in 1 liter of a detergent aqueous solution for evaluation 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 10 ° C, rinsing with tap water for 5 minutes.)
The detergency was determined by visually comparing the stained cloths of the product of the present invention and the commercial product after cleaning. As a result, it was found that the product of the present invention had superior detergency than the commercial product.

[0044]

The high bulk density detergent composition of the present invention has approximately the same solubility of detergent particles as the enzyme-containing particles, and can sufficiently exert detergency even under low-temperature washing conditions.

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[Procedure amendment]

[Submission date] January 28, 2000 (2000.1.2
8)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction contents]

[0006]

That is, the gist of the present invention is as follows.
High bulk density detergent particles containing a surfactant and having a 95% dissolution time of 90 seconds or less by an electric conductivity method at 10 ° C and enzyme-containing particles having a 95% dissolution time of 60 to 300 seconds. comprising a high bulk density detergent compositions, the high bulk
The density detergent particles have an average particle size of 150 to 500 μm, bulk density
Particles having a particle size of 500 g / L or more and a particle size of 710 μm or more
Particles having a particle size of less than 125 μm have a high bulk density
High bulk density detergent composition of not more than 10% by weight of the total detergent particles
At 10 ° C. containing a substance and a surfactant
High bulk density with 95% dissolution time of less than 90 seconds by conductivity method
Detergent particles and an enzyme having a 95% dissolution time of 60 to 300 seconds;
A high bulk density detergent composition comprising
The high bulk density detergent particles have an average particle size of 150 to 600 μm.
m, a bulk density of 500 g / L or more and a poorly water-soluble inorganic substance
And selected from the group consisting of water-soluble polymers and water-soluble salts
Base granules containing one or more water-soluble components
And a surfactant having a high bulk density .

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Kimihiro Mizusawa 1334 Minato, Wakayama City, Kao Corporation Research Institute (72) Inventor Hiroyuki Saijo 1334 Minato, Wakayama City, Kao Corporation Laboratory F-term (reference) 4H003 AB19 AB27 BA10 CA15 CA18 DA01 EA12 EA16 EA25 EA28 EB32 EB36 EC01 FA07 FA32

Claims (3)

[Claims] 1. High-density detergent particles containing a surfactant and having a 95% dissolution time of 90 seconds or less by an electric conductivity method at 10 ° C., and enzyme-containing particles having a 95% dissolution time of 60 to 300 seconds. And a high bulk density detergent composition. 2. The high bulk density detergent particles have an average particle size of 150 to
500 μm, bulk density of 500 g / L or more, and 710
The detergent composition according to claim 1, wherein the particles having a particle diameter of not less than μm and the particles having a particle diameter of not more than 125 μm are respectively 10% by weight or less of the whole high bulk density detergent particles. 3. The high bulk density detergent particles have an average particle size of 150 to
A surfactant is supported on a base granule having a thickness of at least 600 μm and a bulk density of at least 500 g / L and containing a poorly water-soluble inorganic substance and at least one water-soluble component selected from the group consisting of a water-soluble polymer and a water-soluble salt. The detergent composition according to claim 1, which is prepared.