JPH07109486A - Washing of clothes - Google Patents

Abstract

PURPOSE:To provide a method for efficiently washing clothes whereby excellent washing performance can be attained in washing clothes with a continuous upright inner drum rotary washer having at least two separate washing tubs. CONSTITUTION:In this method for washing clothes with a continuous upright inner drum rotary washer having at least two separate washing tubs in one of which the clothes are washed, and transferred to the subsequent tub, after the washing liquid is discharged in which the clothes are washed again, the process comprises washing the clothes by adding a liquid detergent containing an oxyethylene/oxypropylene copolymer addition type silicone oil and a surfactant and a liquid washing aid mainly consisting of a chelating agent and/or an alkali agent to the washing tubs.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for washing clothes, and more particularly to a method for washing clothes using a continuous vertical type inner cylinder rotary type washing machine in the field of laundry for linen.

[0002]

2. Description of the Related Art A conventional continuous vertical inner cylinder rotary type washing machine generally has 3 to 6 washing tanks. The clothes are put into the frontmost washing tank, and subjected to vertical stirring and washing for a predetermined time, and then sent to the next washing tank. Similar cleaning is performed in this cleaning tank, and finally, after completion of cleaning in the final cleaning tank, it is sent to the rinsing tank. On the other hand, the detergent solution was added to the rearmost cleaning tank, successively sent to the front cleaning tank, and finally discharged from the frontmost cleaning tank. That is, since the detergent solution is used in common in each cleaning tank, there is a drawback that sufficient cleaning performance cannot be exhibited. However, in recent years, a continuous vertical inner cylinder rotating type washing machine in which each washing tank is independent has appeared. This washing machine has the advantage of being able to add and discharge detergent in each tank, and can be expected to improve the washing performance compared to conventional washing machines, but a washing method suitable for this washing machine has not been established yet. is the current situation.

[0003]

DISCLOSURE OF THE INVENTION The present invention is an efficient washing method that exhibits excellent washing performance in washing clothes using a continuous vertical inner cylinder rotary washing machine having at least two independent washing tanks. The purpose is to provide a method.

[0004]

DISCLOSURE OF THE INVENTION The present invention provides a liquid detergent which is transparent and uniform and has a low foaming property by using a specific silicone as a liquid detergent in the washing of clothes using a continuous vertical inner cylinder rotary washing machine. Was obtained based on the finding that efficient cleaning can be achieved by using this and a liquid cleaning auxiliary agent in separate cleaning tanks or together in the same cleaning tank. That is, the present invention has at least two independent washing tanks, and after washing clothes in one washing tank,
A method for washing clothes using a continuous vertical inner cylinder rotating type washing machine, in which the washing liquid in the washing tank is discharged, and the clothes are moved to the next washing tank and washed again, comprising: (A) oxyethylene / oxy A liquid detergent containing a propylene copolymer-added silicone oil and a surfactant, and (B) a chelating agent and / or
Alternatively, there is provided a method for cleaning clothes, which comprises adding a liquid cleaning aid containing an alkaline agent as a main component to a cleaning tank to wash the clothes.

The oxyethylene / oxypropylene copolymer-added type silicone oil used in the liquid detergent (A) of the present invention is obtained by adding an oxyethylene / oxypropylene copolymer to dimethylsiloxane. SH manufactured by Dow Corning Silicone Co., Ltd.
3748, SH3749, SH8700 and L-76 manufactured by Nippon Unicar Co., Ltd.
02, L-7604, etc. With other water-soluble silicone oils, the foam control effect is inadequate, and the foam plays a cushioning role, which reduces the mechanical force during cleaning.
It is not preferable because the detergency is not improved. The compounding amount of the oxyethylene / oxypropylene copolymer addition type silicone oil used in the present invention is 0.01 to 10% by weight (hereinafter,%
Abbreviated), preferably 0.1 to 5%, 0.0
If it is less than 1%, the foam control effect becomes insufficient, and 10
The effect cannot be expected to improve even if the content exceeds 10%.

The surfactant used in the liquid detergent (A) of the present invention is not particularly limited, and nonionic surfactants, anionic surfactants, amphoteric surfactants, etc. may be used alone or in combination of two or more. Can be used in combination. The amount of the surfactant used in the present invention is 3 to 50%,
The content is preferably 5 to 30%, and if the content is 3% or less, the detergency becomes insufficient, and if the content exceeds 50%, the improvement of the effect cannot be expected.

Examples of the nonionic surfactant used in the present invention include the following. 1) Polyoxyalkylene alkyl or alkenyl ether obtained by adding 7 to 18 mol of ethylene oxide (EO) and / or propylene oxide (PO) on average to a primary or secondary alcohol having 8 to 18 carbon atoms, 2) 6 to 6 carbon atoms. 22 fatty acids with ethylene oxide (E
O) and / or propylene oxide (PO) is added in an average of 7 to 18 mol, and a polyoxyalkylene alkyl or alkenyl fatty acid or a lower alkyl ester thereof is included. 3) An alkyl group having an average of 6 to 12 carbon atoms and an average of ethylene oxide 1 to 20 mol of added polyoxyethylene alkylphenyl ether, 4) mono- or dialkanol amide to which ethylene oxide having 10 to 22 carbon atoms may be added, 5) alkyl polyglycoside having 8 to 20 carbon atoms, 6) average Ester of C10-20 fatty acid and sucrose, 7) Average C10-20 fatty acid glycerin monoester, 8) Alkylamine oxide having C10-20 alkyl group or alkenyl group, 9) Propylene oxide Condensation with propylene glycol Those obtained by adding ethylene oxide to the product (Pluronic type surfactant), 10) those obtained by adding ethylene oxide to the reaction product of propylene oxide and ethylenediamine (Tetronic type surfactant), and these alkyl or alkenyl groups are It may be linear or branched. Of these, the nonionic surfactants of 1) and 2) above are preferable.

The following are mentioned as anionic surfactants used in the present invention. 1) a linear or branched alkylbenzene sulfonate having an alkyl group having 8 to 16 carbon atoms, 2) an alkyl sulfate or alkenyl sulfate having 10 to 20 carbon atoms, and 3) an olefin sulfonate having 10 to 20 carbon atoms , 4) alkane sulfonate having 10 to 20 carbon atoms, 5) alkane carboxylic acid salt having 10 to 20 carbon atoms, and 6) having a linear or branched alkyl group or alkenyl group having 10 to 20 carbon atoms, An average of 0.5 to 8 mol of ethylene oxide, propylene oxide, butylene oxide or ethylene oxide / propylene oxide = alkyl ether sulfate or alkenyl added at a ratio of 0.1 / 9.9 to 9.9 / 0.1 Ether sulfate, 7) straight chain or branched chain alkyl group or alkenyl having 10 to 20 carbon atoms Having a group average 0.5-8 moles of ethylene oxide or propylene oxide or butylene oxide or ethylene oxide / propylene oxide = 0.1 / 9.9 to 9.9 / 0.1
Alkyl ether carboxylate or alkenyl ether carboxylate added in a ratio of 8), 8) Alkyl polyhydric alcohol ether sulfate such as C10-20 alkyl glyceryl ether sulfonate, 9) C8-20 Saturated or unsaturated α-sulfo fatty acid salt or its methyl, ethyl or propyl ester, 10) amino acid type surfactant, 11) N-acyl amino acid type surfactant such as acyl sarcosinate, 12) alkyl or alkenyl acidic phosphoric acid Ester or phosphate ester, 13) Fatty acid salt, and of these, the anionic surfactants of 1), 3) and 6) above are preferable. As the salts of these anionic surfactants, sodium salts, potassium salts, ammonium salts, alkanolamine salts and the like are used.

Examples of the amphoteric surfactant used in the present invention include the following. (1) Ammonium betaines such as N, N-dimethyl-N-hexadecyl-N-carboxymethylammonium betaine, (2) N, N-dimethyl-N-hexadecyl-
Sulfobetaines such as N-sulfopropylene ammonium betaine, (3) sulfoamino acids such as 3- (dodecylamino) -propane-1-sodium sulfonate,
(4) An amino acid type surfactant such as 3- (dodecyl-amino) -sodium propionate.

The liquid detergent (A) in the present invention may further contain the following components, if necessary. 1) polyethylene glycol, polyvinyl alcohol,
Polyvinylpyrrolidone, carboxymethylcellulose,
Anti-redeposition agent such as polyacrylate. 2) Hydrotrope agents such as short-chain alkylbenzene sulfonates, lower alcohols and polyhydric alcohols. 3) Bleach activators such as TAED, tetraacetyl glucose, alkanoyl benzene sulfonate and alkanoyl benzoate. 4) Enzymes such as protease, amylase, cellulase and lipase. 5) Other fluorescent agents, fragrances, bluing agents, anti-caking agents, antioxidants and the like can be added as required. The balance of the liquid detergent (A) in the present invention is water. The viscosity of the liquid detergent (A) in the present invention is arbitrary as long as it can be used in a continuous vertical inner cylinder rotary washing machine, but it is usually 500 cp
It is desirable that the temperature is below (25 ° C.). Examples of the chelating agent used in the liquid cleaning aid (B) of the present invention include phosphate type chelating agents such as sodium tripolyphosphate, sodium pyrophosphate and sodium orthophosphate; aluminosilicates represented by A-type zeolite; oxalic acid. , Polyvalent carboxylic acid type chelating agents such as salts of organic acids such as citric acid; amino acid salts such as aspartic acid and glutamate or derivatives thereof, amino polyacetic acid salts such as nitrilotriacetate and ethylenediamine tetraacetate Carboxylic acid-based chelating agents; salts of phosphonic acids such as ethane-1,1-diphosphonate, organic phosphonic acid-based chelating agents such as phosphonocarboxylates such as 2-phosphonobutane-1,2-dicarboxylic acid;
Examples thereof include carboxylic acid polymer chelating agents such as polyacrylic acid, polyaconitic acid, and polyacetal carboxylic acid polymer, and these may be used alone or in combination of two or more kinds.

Alkali agents used in the liquid cleaning aid (B) of the present invention include alkali metal hydroxides such as sodium hydroxide and potassium hydroxide; alkali metal silicates such as potassium silicate and sodium silicate; sodium carbonate. Alkali metal carbonates such as potassium carbonate, sodium hydrogen carbonate, and sodium sesquicarbonate; alkanolamines such as monoethanolamine and diethanolamine. These may be used alone or in combination of two or more. Things are possible. Each of these chelating agents or alkaline agents is contained in the liquid cleaning auxiliary agent (B) at 5 to 40%,
It is preferably mixed in an amount of 10 to 40%. In this case, it is preferable that the chelating agent and the alkali agent are mixed in a large amount. More preferably, the liquid cleaning aid (B) is (1) one or more selected from the group consisting of potassium tripolyphosphate, potassium pyrophosphate and potassium phosphate, and (2) potassium carbonate, potassium silicate and water. It is preferably composed of one or more selected from the group consisting of potassium oxide, and the component (1) / component (2) weight ratio is preferably 1/8 or more. In other words, the lack of the component (2) is not preferable because the detergency is significantly reduced, and a sufficient cleaning effect is exhibited even when the weight ratio of the component (1) to the component (2) is less than 1/8. Not preferable. The balance of the liquid cleaning aid (B) in the present invention is water. The viscosity of the liquid cleaning aid (B) in the present invention is arbitrary as long as it can be used in a continuous vertical inner cylinder rotary cleaning machine, but it is usually preferably 500 cp or less (25 ° C.).

In the present invention, the liquid detergent (A) and the liquid washing aid (B) are added to separate washing tanks or the same washing tank to wash clothes. At this time, the liquid cleaning auxiliary agent (B) was added to the previous cleaning tank, and the liquid cleaning auxiliary agent (B) was added to the subsequent cleaning tank.
Or the liquid detergent (A) and the liquid cleaning aid (B) are preferably added to the same cleaning tank. In particular, when the liquid cleaning auxiliary agent (B) is added to the previous cleaning tank and the liquid cleaning auxiliary agent (B) is added to the subsequent cleaning tank, the cleaning can be efficiently performed. In the present invention, a bleaching agent such as hydrogen peroxide, sodium percarbonate, sodium perborate, sodium hypochlorite, a softening agent or a glue, in addition to the liquid detergent (A) and the liquid cleaning auxiliary agent (B), may be used, if necessary. A finishing agent such as an agent can be used within a range not deteriorating the detergency. The cleaning method of the present invention will be described by taking as an example the case where a continuous vertical inner cylinder rotating type cleaning machine having four cleaning tanks is used. In this case, the liquid detergent (A), the liquid cleaning aid (B), etc. are added to a specific cleaning tank as follows, for example.

[0013]

[Table 1] First cleaning tank Second cleaning tank Third cleaning tank Fourth cleaning tank No1 (B) (A) Washing with water Washing with water No2 (A) and (B) Washing with water Washing with water No3 (B) Washing with water (A) and ( B) Wash with water No4 Wash with water (A) and (B) Wash with bleach No5 (B) (A) Wash with softener

Here, as the cleaning condition, for example, 20
20 to 50 kg of clothing for a 00 liter washing tank,
Liquid washing assistant (B) 100-1000g or liquid detergent (A) 100-1000g and water 100-1000Kg are put, and it wash | cleans for 20-40 minutes normally at 30-70 degreeC.
Here, the concentration of the surfactant in the cleaning liquid in the cleaning tank is 0.
It is preferable that the concentration is 01 to 0.1%, and that the total concentration of the chelating agent, the alkaline agent, or both in the cleaning liquid in the cleaning tank is 0.02 to 0.5%. . In the washing machine of the present invention, washing is performed by putting the washing auxiliary agent solution and clothing or the washing solution and clothing in the washing tank and then rotating the washing tank in the vertical direction. Usually, the rotation speed is about 15 to 40 rpm. The number of washing tanks in the continuous vertical inner cylinder rotary washing machine may be at least two, and is usually 2 to 6, but it may be more. In addition, before the washing process using the washing tank of the continuous vertical inner cylinder rotary washing machine, a pre-washing process of dipping clothing or water can be provided. Further, a rinsing step, a sizing step, and a drying step can be provided after the washing step using the washing tank.

[0015]

According to the present invention, good washing performance can be obtained in washing clothes using a continuous vertical inner cylinder rotating type washing machine having an independent washing tank, which is particularly suitable for laundry. It is suitable as a method for washing clothes. Next, the present invention will be described with reference to examples, but the present invention is not limited to the following examples.

[0016]

【Example】

Example 1 Various liquid detergents A1 having the composition (% by weight) shown in Table-1
~ A8 and various liquid cleaning aids B1 to B3 shown in Table-2 are prepared and combined as shown in Table-1 to wash clothes,
The performance was evaluated by the following methods. The results are shown in Table-3.

[Table 2] Table-1 (of liquid detergent A
composition) A1 A2 A3 A4 A5 A6 A7 A8 Nonionic surfactant * 1 10 10 10 10 10 10 10 10 10 Betaine aminoacetate * 2 5 5 5 5 5 5 5 5 5 Silicone SH3748 * 3 1 − − − − − − − Silicone SH3749 * 3 − 0.5 − − − − −− Silicone SH8700 * 3 − − 0.5 − − − − − Silicone L-7602 * 4 − − − 1 − − − − Silicone L-7604 * 4 − − − − 0.5 − − − Silicone SH3746 * 5 − − − − − − 1− Silicone SH3771 * 5 − − − − − − − 0.5 Purified water balance * 1 12 mol of ethylene oxide in tridecyl alcohol
And 3 moles of propylene oxide added * 2 Dodecyldimethylaminoacetic acid betaine * 3 Toray Dow Corning Silicone Oki
Siethylene / oxypropylene copolymer addition type silicone
* 4 Nihon Unicar Co., Ltd. oxyethylene oxyp
Ropylene copolymer-added silicone * 5 Oki manufactured by Toray Dow Corning Silicone Co., Ltd.
Silicone copolymer addition type silicone

[0017]

[Table 3] Table-2 (Composition of liquid cleaning aid B) B1 B2 B3 Potassium silicate 2010-Potassium carbonate-1530 Potassium hydroxide 4-5 Sodium hydroxide--1 Potassium pyrophosphate 2045 5 Ethylenediaminetetraacetic acid Sodium -20-potassium nitrilotriacetate -25 Purified water balance

[0018]

[Table 4] Table-3 1st tank 2nd tank 3rd tank 4th tank Detergency EMPA No.101 EMPA No.104 1 B1 A1 Wash with water Wash 75 75 65 2 B1 A2 Wash with water 73 63 3 B1 A3 Wash with water 73 64 4 B2 Wash with water A 69 5 B3 water wash A5 water wash 70 59 6 * B1 A6 water wash water wash 59 48 7 * B2 A7 water wash water wash 60 518 * B3 water wash A8 water wash 56 45 Nos. 5 to 8 are comparative examples. In the table, only tap water is used for washing 4
It was washed by adding 0 kg.

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Kazuaki Fukano 1-3-7 Main Office, Sumida-ku, Tokyo Inside Lion Corporation

Claims (1)

[Claims] 1. At least two independent cleaning tanks,
After washing the clothes in the first washing tank, the washing liquid in the washing tank is discharged, the clothes are moved to the next washing tank, and the clothes are washed again. And (A) a liquid detergent containing an oxyethylene / oxypropylene copolymer-added silicone oil and a surfactant, and (B) a liquid cleaning aid containing a chelating agent and / or an alkaline agent as a main component. A method for washing clothes, which comprises adding an agent to a washing tank to wash the clothes.