JP4391378B2 - Laundry detergent composition - Google Patents

Description

The present invention relates to a laundry detergent composition. More specifically, the present invention relates to a laundry detergent composition that can suppress malodor when drying laundry clothes.

  In recent years, in response to changes in lifestyle and residential environment, laundry clothes are often dried indoors. However, when laundry clothes are dried indoors, it takes time to dry, and the time for the clothes to be squeezed becomes longer, and there is a case where a freshly-smelling odor called “room-drying odor” occurs from the clothes. Yes, you may feel uncomfortable when wearing or using it. The components of this “room-dried odor” are “smell-like odors” such as medium-chain aldehydes, medium-chain alcohols and ketones, “sour odors” such as short-chain fatty acids and medium-chain fatty acids, and “raw smells” such as nitrogen compounds. It is a complex odor composed of sulfur compounds, and medium-chain fatty acids (7 to 9 carbon atoms) are reported to be the key components of a unique sour sweaty odor (Non-Patent Documents) 1).

  The above-mentioned “room-dried odor” is considered to generate bad odors when microorganisms grow due to a minute amount of sebum or protein that cannot be removed by washing when laundry clothes are dried in a room. In order to suppress the generation of such bad odors, several proposals have been made regarding the incorporation of surfactants, antibacterial agents, and the like. For example, a detergent composition containing a surfactant, an ultraviolet absorber and an antibacterial agent (see Patent Document 1), a nonionic surfactant, an oil-absorbing carrier, a clay mineral and an antibacterial agent (patent) A cleaning composition containing a nonionic surfactant and a quaternary nitrogen-containing polymer (see Patent Document 3), a quaternary nitrogen-containing polymer, a cationic antibacterial compound and a surfactant Liquid detergent composition (see Patent Document 4), liquid detergent composition containing two specific cationic compounds and a nonionic surfactant (see Patent Document 5), surfactant and lytic activity A detergent composition containing an enzyme having a value of 80% or more and a casein decomposition specific activity of 90% or more (see Patent Document 6), a surfactant and an enzyme having fungal activity inhibitory action and soil degrading action Detergent group Such things (see Patent Document 7) it has been proposed.

Fragrance Journal, Vol. 30, no. 7, p. 79-83, 2002 Japanese Unexamined Patent Publication No. 7-118696 JP-A-9-194899 Japanese Patent Laid-Open No. 2002-60787 Japanese Patent Laid-Open No. 2002-60788 JP 2002-348593 A JP 2003-119663 A JP 2003-129088 A

The conventionally proposed methods for suppressing the generation of bad odor after washing using the above-mentioned surfactants and antibacterial agents, etc., have some effects, but such as sebum and proteins that are nutrient sources for microorganisms The stain could not be completely removed, and the antibacterial effect was weakened with time .

Accordingly, an object of the present invention is to provide a laundry detergent composition that can effectively suppress bad odor generated when the laundry clothes are dried in the room, and is friendly to the global environment.

The present inventors have conducted intensive research to solve the above problems. First of all, one of the causes of the “drying odor” of laundry is caused by bacteria belonging to the genus Corynebacterium that adheres to the laundry and proliferates. It was thought that the occurrence of “dried room odor” could be suppressed by suppressing the growth of rice. Then, found a bio preservation over coacervation method of suppressing the proliferation of bacteria causing it i.e. odor-causing using a force of organisms. That is, by incorporating lactic acid bacteria wash濯用detergent inhibiting the growth of bacteria causing "room dry smell" occurs, thereby completing the present invention found that it is possible to effectively suppress generation of malodor .

Thus, the present invention is characterized in that it is produced by bacteria belonging to the genus Corynebacterium when laundry clothes are air-dried, characterized in that it contains live lactic acid bacteria in powder or capsule form as an active ingredient. The present invention provides a laundry detergent composition containing a surfactant for suppressing bad odors.

Moreover, this invention provides the method of suppressing the malodor at the time of drying of the laundry clothing characterized by processing clothing with said laundry detergent composition.

According to the present invention, laundering clothing and, in particular, it is possible to provide a wash濯用detergent composition malodor Ru can be effectively suppressed which occurs when the dry room.

  Hereinafter, the present invention will be described in more detail.

The laundry detergent composition of the present invention is characterized by containing lactic acid bacteria as a viable agent. Although it does not restrict | limit especially as lactic acid bacteria, For example, the genus Lactobacillus (Streptococcus) (Streptococcus) genus, Leuconostoc (Leuconostoc) genus, the genus Lactococcus (Pediococcus genus), Tediococcus genus (Tedococcus genus), And lactic acid bacteria belonging to the genus Bacillus and Sporolactobacillus, and specifically, Lactobacillus delbrueckii, Streptococcus salivarius, Office (Leuconostoc lactis), Lactococcus lactis (Lactococcus lactis), Pediococcus pentosaceus (Pediococcus pentosaceus), tetra genomic Lactococcus halophilus (Tetragenococcus halophilus), Bacillus coagulans (Bacillus coagulans), scan polo Lactobacillus Nakayamae (Spo r olactobacillus nakayamae) Etc. can be illustrated.

As a method for obtaining viable cells of lactic acid bacteria described above, culture Yogo, using separation means such as centrifugation to recover the cells, be thoroughly cleaned of bacteria, employing an appropriate drying means, such as freeze-drying It can be made into a powder form or processed into an appropriate form such as a capsule form.

The laundry detergent compositions in the present invention, a detergent that is used in the washing, for example, when washing the lactic acid bacteria mentioned above can and child added detergent simultaneously with the washing濯衣fees, in particular occur when the dry room It is possible to effectively suppress bad odors.

The amount of dry lactic acid bacteria (as the number of viable bacteria of 1010 to 108 / g) blended in the laundry detergent composition of the present invention cannot be generally determined depending on the type and form of lactic acid bacteria, the type of laundry product, and the like. However, it can be exemplified by the range of about 0.01 to about 10% by weight, preferably about 0.1 to about 1% by weight, based on the whole laundry detergent composition.

  Hereinafter, the present invention will be specifically described with reference to Examples and Comparative Examples.

Test Example 1 (Generation of room-dried odor)
To 3 used towels, 4 L of tap water and laundry detergent were added, washed by hand for 5 minutes and then drained. Further, it was rinsed 4 times with 4 L of tap water. Water was squeezed out by hand, dried in a 450 × 300 × 450 (W × D × H) acrylic airtight container, and allowed to stand in a thermostatic bath at 25 ° C., 30 ° C., and 35 ° C. for 3 days to keep it freshly dried. After standing for 3 days, a sensory evaluation was performed to confirm whether or not a “dry room odor” had occurred. The results are shown in Table 1.

Test Example 2 (Microbial separation)
As a result of sensory evaluation in Test Example 1, an attempt was made to separate microorganisms from towels that were left at 25 ° C. or 30 ° C., which had a strong “dry room smell”. That is, 300 g of sterilized water was put into a bottle containing a towel that was allowed to stand at 25 ° C. or 30 ° C. for 3 days and mixed well with a spatula. From this, 1 mL was taken, diluted appropriately with physiological saline, and mixed-cultured in potato dextrose agar medium, standard agar medium, and m-TGC medium (anaerobic). The cells were cultured at 25 ° C. and 30 ° C. for 1 to 4 days, and the number of bacteria after the cultivation was measured. The results are shown in Table 2. In addition, microorganisms grown on each medium were isolated.

Test example 3 (confirmation of “dry room odor”)
A 0.1% aqueous peptone solution was dispensed into test tubes and sterilized by autoclaving. One isolate of the isolates isolated in Test Example 2 was inoculated into a 0.1% aqueous peptone solution, statically cultured at 25 ° C. and 30 ° C. for 3 days, and the sensory evaluation of the culture solution was performed. .

Test Example 4 (Bacterial identification test and “odor generation” that generate “room-dried odor”)
As a result of sensory evaluation of Test Example 3, no. No. 8 reproduces the “room-dried odor” best. The eight strains were subjected to an identification test according to the literature (edited by Takeharu Hasegawa, revised edition: isolation and identification of microorganisms <below> and BERGEY'S MANUAL OF Systemic Bacteriology).

Identification test result Test item Result Gram staining (+)
Shape R
Sports (-)
Mobility (-)
Growth in air (+)
Growth neurally (-)
Catalase (+)
Oxidase (-)
Acid production from glucose (-)
OF test (-)

  As a result of the identification test, it was identified as a microorganism belonging to the genus Corynebacterium. This strain was designated as Corynebacterium HY-8.

Then, generation | occurrence | production of the room-drying odor was tried using Corynebacterium HY-8 stock | strain which belongs to the genus Corynebacterium, and type culture (Corynebacterium equi IFO3730, Corynebacterium glutamicum IAM12435). That is, 4 L of tap water and laundry detergent were added to 3 used towels, and they were washed by hand for 5 minutes and then drained. Further, it was rinsed 4 times with 4 L of tap water. This was manually squeezed to remove moisture, wrapped in a towel made of tubular filter paper, and placed in a 950 mL mayonnaise bottle. The lid was lightly covered with aluminum foil, sterilized by autoclave (120 ° C., 15 minutes), and allowed to stand overnight at room temperature. Three of these were prepared. To this was added 1 mL of a suspension of Corynebacterium HY-8 strain, Corynebacterium equi IFO3730, Corynebacterium glutamicum IAM12435, each normal agar slant culture monoplatinous ear in 10 mL of physiological saline, and 450 × 300 × 450. It was spread and dried in an acrylic sealed container of (W × D × H), and left still in a thermostatic bath at 30 ° C. for 3 days to keep it freshly dried. After standing for 3 days, a sensory evaluation was performed to confirm whether or not a “dry room odor” had occurred. As a result of sensory evaluation, it was found that all the strains generated room-dried odor, and room-drying odor was also generated in the genus Corynebacterium other than the room-drying odor-producing isolate, Corynebacterium HY-8. . Hereinafter, this Corynebacterium equi IFO3730 and Corynebacterium glutamicum IAM12435 were used as room-drying odor-producing bacteria.

Example 1 (Inhibiting effect of room drying odor by lactic acid bacteria)
To assume a used towel, the towel was immersed in 2.5 L of a 0.1% aqueous peptone solution for 3 hours. I squeezed it well with my hand and washed it in a fully automatic washing machine with laundry detergent as usual. After drying in the room until it dries well, it was soaked in tap water and lightly squeezed. This towel was wrapped in a cylindrical filter paper and placed in a 950 mL mayonnaise bottle. The lid was lightly covered with aluminum foil, sterilized by autoclave (120 ° C., 15 minutes), and left overnight at room temperature. One platinum loop of Corynebacterium equi IFO3730 was suspended in 10 mL of physiological saline, and 1 mL was dispensed into 9 mL of physiological saline. 0.1 mL of the following various lactic acid bacteria cultured in a normal medium (liquid medium) is added to the Corynebacterium equi IFO 3730 suspension, and the whole amount of the bacterial suspension (Corynebacterium equi IFO 3730 and lactic acid bacteria turbid solution) is added to the towel. , 450 × 300 × 450 (W × D × H) in an acrylic sealed container, left to stand at 30 ° C. for 3 days, and subjected to sensory evaluation by five panelists. The control was a towel without the addition of lactic acid bacteria.

Lactic acid bacteria used in the test Lactobacillus delbruekii subsp.bulgaricus JCM1002
2. Streptococcus salivarius subsp. Thermophilus IFO13957
3. Leuconostoc lactis JCM9700
4). Lactococcus lactis subsp.Lactis JCM5805
5. Pediococcus pentosaceus JCM5890
6). Bacillus coagulans JCM2258
7). Spo r olactobacillus nakayamae subsp.nakayamae JCM3445
8). Spo r olactobacillus nakayamae subsp.racemicus JCM3413

  As a result of sensory evaluation, it was recognized that any of the lactic acid bacteria strains 1 to 8 suppressed the “room-dried odor”.

Production Example 1 (Production example of live lactic acid bacteria powder)
A medium of pure 1000 ml, crystalline glucose (produced by Junsei Chemical) 1 g, peptone (produced by Kyokuto Pharmaceutical), and yeast extract D3 (produced by Dainippon Pharmaceutical) 5 g was sterilized and cooled at 121 ° C. for 15 minutes. In this medium, Lactobacillus delbruekii subsp. 10 g of a culture obtained by cultivating bulgaricus JCM1002 at 35 ° C. for 1 day was inoculated and statically cultured at 35 ° C. for 1 day. The obtained culture was centrifuged (3000 × g, 10 minutes), and the cells were collected. Add 10 g of physiological saline and 5.0 g of dextrin (manufactured by Wako Pure Chemical Industries, Ltd.), mix well, dry with a freeze dryer (UFD-810: manufactured by Tokyo Rika Kikai Co., Ltd.), and dry dry lactic acid bacteria powder (L) 4.5 g Got.

Example 2
Powder detergent A for clothes containing lactic acid bacteria having the following composition and detergent B excluding dry lactic acid bacteria powder (L) from the following composition were prepared.

Composition raw material name of powder detergent A for lactic acid bacteria-containing clothing Amount (g)
Linear alkyl (C11-14) sodium benzenesulfonate 20
Alkyl (C12-15) sodium sulfate 6
POE (10) alkyl (10-16) ether 5
Zeolite 13
Sodium silicate 15
Sodium carbonate 28.5
Sodium sulfate 5
Sodium sulfite 1
Acrylic acid maleic acid copolymer 3
Fragrance 0.5
Purified water 3
Dry lactic acid bacteria powder (L) 0.45

  Ten pieces of used towels were put into a fully automatic washing machine (National NA-F42M3), the amount of water was set to 2 L, and automatic washing was performed individually using lactic acid bacteria-containing clothing powder detergent A20 g and detergent B20 g. At that time, 1 platinum loop of Corynebacterium equi IFO3730 was suspended in 10 ml of physiological saline and added to a 1 ml washing tub.

  Each washed towel was dried in a 450 × 300 × 450 (W × D × H) acrylic sealed container, allowed to stand at 30 ° C. for 3 days, and subjected to sensory evaluation by five panelists. As a result of sensory evaluation, towels using powder detergent A for clothes containing lactic acid bacteria in all panelists did not generate “room-dried odor”, and towels using detergent B generated “room-dried odor”. It was evaluated.

Claims (3)

In order to suppress malodor generated by bacteria belonging to the genus Corynebacterium, when laundry clothes are air-dried, comprising powdered or capsule-like live lactic acid bacteria as an active ingredient A laundry detergent composition containing a surfactant.   Lactobacillus genus, Streptococcus genus, Leuconostoc genus, Lactococcus genus, Pediococcus genus, Tetragenococcus genus Tetragenococcus genus Tetragenococcus The laundry detergent composition according to claim 1, wherein the laundry detergent composition is at least one lactic acid bacterium belonging to the genus Porolatobacillus.   A method for suppressing malodor when drying laundry clothes, comprising treating the clothes with the laundry detergent composition according to claim 1.