JP5837460B2 - Foam cleaning method - Google Patents

Description

  The present invention relates to a foam cleaning method. Furthermore, the present invention relates to a foam cleaning method suitable for cleaning food processing equipment and cooking equipment.

  In the food processing factory, when the production schedule is interrupted, equipment and facilities used for processing or cooking food are regularly cleaned to ensure hygiene. Examples of equipment to be cleaned include a net conveyor, a freezer, a slicer, and a rice mill, and examples of equipment include a floor, a wall, and a work table. Since these objects to be cleaned are large in scale and complicated with parts, as a method for efficiently cleaning them, foam cleaning is usually applied to the object to be cleaned by foaming the detergent. Is adopted.

  In the foam cleaning, a diluted solution obtained by diluting the cleaning composition 2 to 200 times with water is put into an injection device, and bubbles generated by water pressure or air pressure are sprayed and adhered to equipment or facilities to be cleaned. , After holding for a certain period of time, rub with a brush or sponge, or rinse with water without rubbing, or put the cleaning composition into the injection device as a stock solution, The case of mixing and foaming with water and spraying and adhering to the object to be cleaned can be mentioned. In such foam cleaning, by applying the cleaning agent in the form of foam, the residence time in the object to be cleaned becomes longer, and the cleaning / sterilizing effect is improved. Further, in the contact cleaning with foam, since the spraying condition of the cleaning agent can be visually confirmed, there is an advantage that the processing portion can be easily identified and unnecessary scattering of the cleaning agent can be suppressed.

  In addition, for foam cleaning of various facilities, it is also possible to apply a foaming detergent by foaming running water such as tap water using a former having an aspirator structure with a foaming net attached to the injection port. It has been broken. This is a container of a former having an aspirator structure with a net attached to the injection port. The cleaning composition is stored as it is, mixed with water and foamed by water pressure, and sprayed and adhered to the object to be cleaned. There are several advantages. The first is that the agent diluted automatically and continuously and at a constant magnification can be sprayed, and the labor can be reduced. Secondly, since the net is attached to the injection port so that it can be foamed and sprayed evenly, it is possible to clean the corners of wide floors. The third is that work can be performed quickly from injection of the agent to rinsing. In this respect, the foam cleaning method using a former having an aspirator structure in which a foaming net is attached to an injection port is an effective system for cleaning equipment and the like.

  Patent Document 1 contains an alkali metal silicate, an organic phosphonate, and a highly foaming surfactant as a cleaning composition for cleaning equipment and equipment used for food processing or cooking by foam cleaning. An aqueous liquid detergent composition is disclosed.

  Moreover, as a cleaning agent exhibiting a cleaning / sterilizing effect, Patent Literature 2, Patent Literature 3, Patent Literature 4, Patent Literature 5, and Patent Literature 6 disclose a cleaning agent containing hypochlorite.

JP 2007-002014 A JP 2010-150319 A Japanese National Patent Publication No. 9-502747 JP-T 9-500680 JP 2008-214545 A Special table 2008-539301 gazette

  The cleaning composition used for washing food processing equipment or cooking equipment is suitable for foaming and washing, as well as washing / sterilizing performance. It is required to have excellent stability. Conventional liquid processing compositions for food processing equipment or cooking equipment have been developed with a focus on foaming properties and foam stability, including the technology described in Patent Document 1 and conventional food processing. Many liquid detergent compositions for equipment or cooking equipment have achieved sufficient foaming and foam stability. On the other hand, these conventional liquid processing compositions for food processing equipment or cooking equipment are economically disadvantageous because they must be rinsed with a large amount of rinsing water without losing foam during rinsing. Moreover, the work load becomes large (work takes time), and it is disadvantageous in terms of environmental load. However, the foamability / foam stability at the time of washing and the foamability at the time of rinsing are in a trade-off relationship, and it has been very difficult to satisfy both performances at the same time.

  In addition, in the former having the aspirator structure in which the foaming net is attached to the injection port as described above, it is encouraged to rinse the injection port after cleaning. However, rinsing is omitted or simplified. This is simpler in terms of work and meets the actual usage requirements. In that case, if the time until the next cleaning is short, there is no big problem. However, if there is a certain interval, the injection port may be clogged, and it may not be possible to form good quality bubbles. That is, when foam cleaning is repeatedly performed using the former as described above, a problem has been found that it is difficult to maintain the formation of good quality bubbles.

  The object of the present invention is to maintain a good cleaning property and rinsing property when performing foam cleaning using a former having an aspirator structure in which a foaming net is attached to an injection port. Is to provide a foam cleaning method.

  As a result of intensive studies on the above problems, the present inventor has obtained a copolymer of an olefin having 4 to 8 carbon atoms and maleic acid in a system containing an amine oxide surfactant and a fatty acid or a salt thereof in a specific amount. In combination, it has been found that a liquid detergent composition that achieves both foamability / foam stability during foam cleaning and foam breakage during rinsing can be realized. As a result of the foaming, it was found that the viscosity was reduced and good quality foam could be continuously formed using a former, and the present invention was completed.

The present invention
(A) 0.5% by mass or more and 10% by mass or less of one or more compounds selected from oxidative halogen acids and salts thereof (however, in the case where an oxidative halogen acid salt is included, an equivalent amount as oxidative halogen acid) ),
(B-1) 0.5% by mass or more and 1.5% by mass or less of amine oxide having one hydrocarbon group having 8 carbon atoms,
(B-2) 2% by mass or more and 4% by mass or less of amine oxide having one hydrocarbon group having 12 carbon atoms,
(C-1) 1% by mass or more and 2% by mass or less of one or more compounds selected from fatty acids having a hydrocarbon group having 12 carbon atoms and salts thereof,
(C-2) 0.2 mass% or more and 0.8 mass% or less of one or more compounds selected from fatty acids having a hydrocarbon group having 14 carbon atoms and salts thereof,
(D) 2% by mass or more and 4% by mass or less of a copolymer of olefin having 4 to 8 carbon atoms and maleic acid,
(E) 3% by mass or more and 8% by mass or less of alkali metal hydroxide, and
A cleaning composition containing water,
A mesh in which the number of meshes defined by JIS G3555 (: 2004) is 40 mesh or more and 60 mesh or less and the wire diameter defined by JIS G3555 (: 2004) is 0.15 mm or more and 0.25 mm or less. A foam cleaning method in which foam is applied to an object by foaming at a dilution rate of 12 times or more and 130 times or less at a water amount of 1 L / min or more and 20 L / min or less using a former having an aspirator structure attached to an injection port About.

Further, the present invention is used for the foam cleaning method of the present invention.
(A) 0.5% by mass or more and 10% by mass or less of one or more compounds selected from oxidizing halogen acids and salts thereof (hereinafter referred to as component (A)) (provided that oxidizing halogen salts are included) Is an equivalent amount as an oxidative halogen acid),
(B-1) Amine oxide having one hydrocarbon group having 8 carbon atoms [hereinafter referred to as (B-1) component] is 0.5% by mass or more and 1.5% by mass or less.
(B-2) 2% by mass or more and 4% by mass or less of amine oxide [hereinafter referred to as (B-2) component] having one hydrocarbon group having 12 carbon atoms,
(C-1) One or more compounds selected from fatty acids having a hydrocarbon group having 12 carbon atoms and salts thereof [hereinafter referred to as (C-1) component] in an amount of 1% by mass to 2% by mass,
(C-2) One or more compounds selected from fatty acids having a hydrocarbon group having 14 carbon atoms and salts thereof [hereinafter referred to as (C-2) component] are 0.2% by mass or more and 0.8% by mass. Less than,
(D) a copolymer of olefins and maleic acids having 4 or more carbon atoms and 8 or more carbon atoms (hereinafter referred to as component (D)) of 2% by mass or more and 4% by mass or less,
(E) Alkali metal hydroxide [hereinafter referred to as component (E)] is 3% by mass or more and 8% by mass or less, and
The present invention relates to a cleaning composition containing water.

  Hereinafter, the component (B-1) and the component (B-2) are combined as the component (B), and the component (C-1) and the component (C-2) are combined (C) component. Will be described.

  According to the present invention, when performing foam cleaning using a former having an aspirator structure in which a foaming net is attached to an injection port, good cleanability and rinsing performance can be maintained, and good quality foam can be obtained during repeated cleaning. A foam cleaning method is provided.

It is a partial schematic diagram of a former having an aspirator structure used in the present invention.

<< Cleaning composition >>
In the foam cleaning method of the present invention, a cleaning composition containing the following components (A) to (E) is foamed under predetermined conditions and applied to an object.

<(A) component>
The component (A) is one or more compounds selected from oxidizing halogen acids and their salts. Examples of the oxidizing halogen acid include hypochlorous acid, hypobromite, and chlorous acid, and hypochlorous acid is preferred from the viewpoint of bactericidal properties. Examples of the oxidative halogen acid salt include hypochlorous acid, hypobromite, and alkali metal salts of chlorous acid. From the viewpoint of bactericidal properties and versatility, alkali metal salts of hypochlorous acid are used. Of these, sodium hypochlorite is preferable.

  When the content of the component (A) in the cleaning composition used in the present invention is 0.5% by mass or more, a sufficient bactericidal effect can be obtained, and from the viewpoint of feeling of use, 10% by mass. % Or less is preferable. From the viewpoint of obtaining a sufficient bactericidal effect and good usability, the content of the component (A) is 0.5% by mass or more, preferably 1.5% by mass or more, more preferably 2% by mass or more, and 10% by mass. % Or less, preferably 8% by mass or less, and more preferably 5% by mass or less. In addition, the content of the component (A) in the cleaning composition used in the present invention is 0.5 to 10 mass from the viewpoint of obtaining a sufficient bactericidal effect and good usability. %, Preferably 1.5 to 8% by mass, more preferably 2 to 5% by mass. Here, the said content is a value which used the conversion amount as oxidizing halogenic acid, when an oxidizing halogenate is contained in (a) component.

<(B) component>
The component (B) is (B-1) an amine oxide having one hydrocarbon group having 8 carbon atoms and (B-2) an amine oxide having one hydrocarbon group having 12 carbon atoms.

  (B-1) As an amine oxide which has one C8 hydrocarbon group of a component, for example, it has one C8 hydrocarbon group and two C1-C6 alkyl groups Examples thereof include amine oxides and amine oxides having one hydrocarbon group having 8 carbon atoms and two hydroxyalkyl groups having 1 to 3 carbon atoms. (B-1) As an amine oxide of a component, the compound shown by following General formula (1) is preferable.

Wherein R ¹¹ is a hydrocarbon group having 8 carbon atoms, R ¹² is an alkylene group having 1 to 3 carbon atoms, R ¹³ and R ¹⁴ are independently 1 to 6 carbon atoms, preferably 3 The following alkyl groups or hydroxyalkyl groups having 1 to 3 carbon atoms, X is a group selected from —COO—, —OCO—, —NHCO—, —CONH—, —O—, and m is 0 or 1 .)

In the above general formula (1), R ¹¹ may be an alkyl group derived from natural fats and oils, and is preferably a linear alkyl group from the viewpoint of using natural raw materials. From the viewpoint of contributing to foaming properties during rinsing, a compound in which R ¹¹ is an octyl group, R ¹³ and R ¹⁴ are both methyl groups, and m is 0 (that is, octyldimethylamine oxide) is preferable.

  (B-2) As an amine oxide having one hydrocarbon group having 12 carbon atoms, for example, an amine oxide having one hydrocarbon group having 12 carbon atoms and two alkyl groups having 1 to 6 carbon atoms. And an amine oxide having one hydrocarbon group having 12 carbon atoms and two hydroxyalkyl groups having 1 to 3 carbon atoms. (B-2) As an amine oxide of a component, the compound shown by following General formula (2) is preferable.

(Wherein R ²¹ is a hydrocarbon group having 12 carbon atoms, R ²² is an alkylene group having 1 to 3 carbon atoms, and R ²³ and R ²⁴ are independently 1 to 6 carbon atoms, preferably 3 The following alkyl groups or hydroxyalkyl groups having 1 to 3 carbon atoms, X is a group selected from —COO—, —OCO—, —NHCO—, —CONH—, —O—, and n is a number of 0 or 1 .)

In the above general formula (2), R ²¹ may be a natural oil-derived alkyl group, and a linear alkyl group is preferred from the viewpoint of using natural raw materials. From the viewpoint of contributing to foaming properties during rinsing, a compound in which R ²¹ is a dodecyl group, R ²³ and R ²⁴ are both methyl groups, and n is 0 (that is, dodecyldimethylamine oxide) is preferable.

  The content of the component (B-1) in the cleaning composition used in the present invention is such that, when repeated foam cleaning is performed using a former, good quality foam is formed, and foaming and rinsing properties are provided. From the viewpoint of satisfying both, 0.5 mass% or more and 1.5 mass% or less. The content of the component (B-1) is preferably 0.6% by mass or more, more preferably 0.7% by mass or more, further 0.8% by mass or more, and further preferably 0.9% by mass or more in the cleaning composition. And, it is preferably 1.4% by mass or less, further 1.3% by mass or less, further 1.2% by mass or less, and more preferably 1.1% by mass or less. Moreover, 0.6-1.4 mass% is preferable in the said cleaning composition, and, as for content of (B-1) component, 0.7-1.3 mass% is more preferable, 0.8-1 .2% by mass is further preferable, and 0.9 to 1.1% by mass is even more preferable.

  The content of the component (B-2) in the cleaning composition used in the present invention is such that, when repeated foam cleaning is performed using a former, good quality foam is formed, and foaming and rinsing properties are provided. From the viewpoint of achieving both, the content is 2% by mass or more and 4% by mass or less. The content of the component (B-2) is preferably 2.2% by mass or more, more preferably 2.5% by mass or more, and further preferably 2.8% by mass or more in the cleaning composition, and (B-2) The component content is preferably 3.8% by mass or less, more preferably 3.5% by mass or less, and further preferably 3.2% by mass or less. In addition, the content of the component (B-2) is preferably 2.2 to 3.8% by mass, more preferably 2.5 to 3.5% by mass in the cleaning composition, and 2.8 to 3%. More preferably, 2% by mass.

  In the cleaning composition used in the present invention, when performing foam cleaning repeatedly using a former, from the viewpoint of forming good-quality foam, and from the viewpoint of achieving both foamability and rinsing properties, (B-1) The mass ratio (B-2) / (B-1) of the content of the component (B-2) to the content of the component is 2.5 or more, further 2.6 or more, further 2.7 or more, and further 2.8. The above is preferable, and 3.5 or less, further 3.4 or less, further 3.3 or less, and further 3.2 or less are preferable. From the same viewpoint, the mass ratio (B-2) / (B-1) is preferably 2.5 to 3.5, more preferably 2.6 to 3.4. 7-3.3 is still more preferable, and 2.8-3.2 is even more preferable.

<(C) component>
Component (C) is (C-1) one or more compounds selected from fatty acids having 12 hydrocarbon groups and salts thereof, and (C-2) fatty acids having 14 hydrocarbon groups and salts thereof. It consists of 1 or more types of compounds chosen from these.

  (C-1) As a 1 or more types of compound chosen from the fatty acid which has a C12 hydrocarbon group of a component, and its salt, lauric acid or its salt is preferable. The salt of lauric acid is preferably an alkali metal salt, and the alkali metal salt is preferably a sodium salt or a potassium salt.

  (C-2) As one or more compounds selected from fatty acids having a hydrocarbon group having 14 carbon atoms and salts thereof, myristic acid or a salt thereof is preferable. The salt of myristic acid is preferably an alkali metal salt, and the alkali metal salt is preferably a sodium salt or a potassium salt.

  The content of the component (C-1) in the cleaning composition used in the present invention is such that, when repeated foam cleaning is performed using a former, good quality foam is formed, and foaming and rinsing properties are provided. From the viewpoint of achieving both, the content is 1% by mass or more and 2% by mass or less. The content of the component (C-1) is preferably 1.1% by mass or more, further 1.2% by mass or more, further 1.3% by mass or more, and more preferably 1.4% by mass or more in the cleaning composition. 1.9% by mass or less, more preferably 1.8% by mass or less, further 1.7% by mass or less, and further preferably 1.6% by mass or less. Moreover, content of (C-1) component is 1-2 mass% in the said cleaning composition, It is preferable that it is 1.1-1.9 mass%, 1.2-1.8 It is more preferably mass%, further preferably 1.3 to 1.7 mass%, and still more preferably 1.4 to 1.6 mass%.

  The content of the component (C-2) in the cleaning composition used in the present invention is such that, when foam cleaning is repeatedly performed using a former, a good quality foam is formed, and foamability and rinsing properties are provided. From the viewpoint of achieving both, the content is 0.2% by mass or more and 0.8% by mass or less. The content of the component (C-2) in the cleaning composition is preferably 0.3% by mass or more, more preferably 0.4% by mass or more, and 0.7% by mass or less, and further 0.6% by mass. The following is preferred. Further, the content of the component (C-2) is preferably 0.3 to 0.7% by mass and more preferably 0.4 to 0.6% by mass in the cleaning composition. .

  In the detergent composition used in the present invention, from the viewpoint of forming good-quality foam, and from the viewpoint of achieving both foamability and rinsing properties, the content of the component (C-1) relative to the content of the component (C-2) The mass ratio (C-1) / (C-2) of the content is 2.5 or more, more preferably 2.6 or more, further 2.7 or more, more preferably 2.8 or more, and 3.5 or less, 3.4 or less, 3.3 or less, and 3.2 or less are preferable. From the same viewpoint, the mass ratio (C-1) / (C-2) is preferably 2.5 to 3.5, more preferably 2.6 to 3.4. 7-3.3 is still more preferable, and 2.8-3.2 is even more preferable.

  In the cleaning composition used in the present invention, the total content of the component (B-1) and the component (B-2) (B), the total content of the component (C-1) and the component (C-2) ( The mass ratio (B) / (C) of C) is as follows: 1. From the viewpoint of forming good-quality foam when carrying out repeated foam cleaning using a former; 5 or more, further 1.6 or more, further 1.7 or more, and further 1.8 are preferable, and 2.5 or less, further 2.4 or less, further 2.3 or less, and further 2.2 or less are preferable. From the same viewpoint, the mass ratio (B) / (C) is preferably 1.5 to 2.5, more preferably 1.6 to 2.4, and 1.7 to 2. Is more preferably 3, and even more preferably 1.8 to 2.2.

  Content of (A) component of cleaning composition used for this invention, and the total content of (B-1) component, (B-2) component, (C-1) component, and (C-2) component The mass ratio (A) / (B + C) with the amount (B + C) is determined from the viewpoints of forming good-quality foam and achieving both foamability and rinsing properties when repeated foam cleaning is performed using a former. 0.2 or more, further 0.3 or more, and further 0.4 or more are preferable, and 0.8 or less, further 0.7 or less, and further 0.6 or less are preferable. For the same reason, the mass ratio (A) / (B + C) is preferably 0.2 to 0.8, more preferably 0.3 to 0.7, and 0.4 to 0. More preferably, it is .6.

<(D) component>
Component (D) is a copolymer of (d1) an olefin having 4 or more and 8 or more carbon atoms and (d2) maleic acid. When performing foam cleaning repeatedly using a former, it is important to use the component (D) in combination from the viewpoint of forming good-quality foam and achieving both foamability and rinsing properties.

  As component (D), in addition to (d1) an olefin having 4 or more carbon atoms and 8 or more and (d2) maleic acid, one or more other monomers may be added within a range that does not impair the effects of the present invention. A copolymerized copolymer can be used.

  (D1) Preferred examples of the olefin having 4 or more and 8 or more carbon atoms include diisobutylene, isobutylene, and pentene. When performing foam cleaning repeatedly using a former, diisobutylene and isobutylene are preferable, and diisobutylene is more preferable from the viewpoint of forming good-quality foam and achieving both foamability and rinsing properties.

  Specific examples of the component (D) include diisobutylene / maleic acid copolymer, isobutylene / maleic acid copolymer, and pentene / maleic acid copolymer. When foam cleaning is repeatedly performed using a former, In addition, a diisobutylene / maleic acid copolymer is preferred from the viewpoint of forming good-quality foam and achieving both foamability and rinsing properties.

  The copolymerization ratio of (d1) olefins having 4 or more carbon atoms and 8 or more and (d2) maleic acid is a viewpoint of forming good-quality foam when foaming washing is repeatedly performed using a former, and From the viewpoint of achieving both rinsing properties, (d1) / (d2) is preferably 1/9 or more, more preferably 3/7 or more, and preferably 9/1 or less, and more preferably 7/3 or less, in terms of molar ratio. For the same reason, the molar ratio of (d1) / (d2) is preferably 1/9 to 9/1, and more preferably 3/7 to 7/3.

  The component (D) of the present invention may be obtained by any polymerization method, but a methyl ethyl ketone polymerization method is preferred.

  The weight average molecular weight (Mw) of the copolymer of component (D) is from the viewpoint of forming good-quality foam and achieving both foamability and rinsing properties when repeated foam cleaning is performed using a former. 2,000 or more, 200,000 or less, further 100,000 or less, and further 50,000 or less. For the same reason, the weight average molecular weight (Mw) of the copolymer of component (D) is preferably in the range of 2,000 to 200,000, more preferably 2,000 to 100,000. 000, more preferably in the range of 2,000 to 50,000. In addition, the weight average molecular weight of (D) component can be measured on condition of the following by size exclusion chromatography.

(Weight average molecular weight measurement conditions)
Apparatus: HLC-8320GPC (manufactured by Tosoh Corporation)
Calibration curve: Standard polystyrene Column: α-M + α-M (manufactured by Tosoh Corporation)
Eluent: 50 mM lithium bromide, 60 mM phosphoric acid / N, N-dimethylformamide

  The content of the component (D) in the cleaning composition used in the present invention is compatible with the viewpoint of forming high-quality foam when performing foam cleaning repeatedly using a former, as well as foamability and rinsing properties. From the viewpoint of, it is 2 mass% or more and 4 mass% or less. The content of the component (D) is 2.2% by mass or more, more preferably 2.5% by mass or more, further preferably 2.7% by mass or more, and 3.8% by mass or less in the cleaning composition. Further, it is preferably 3.5% by mass or less, and more preferably 3.3% by mass or less. For the same reason, the content of the component (D) is 2 to 4% by mass, preferably 2.2 to 3.8% by mass, more preferably 2. It is 5-3.5 mass%, More preferably, it is 2.7-3.3 mass%.

<(E) component>
The component (E) is an alkali metal hydroxide. Suitable examples of the alkali metal hydroxide include sodium hydroxide and potassium hydroxide.

  The content of the component (E) in the cleaning composition used in the present invention is 3% by mass or more and 8% by mass or less from the viewpoint of detergency. The content of the component (E) is preferably 4% by mass or more, more preferably 5% by mass or more, and preferably 7% by mass or less, and more preferably 6% by mass or less in the cleaning composition. For the same reason, the content of the component (E) is 3 to 8% by mass in the cleaning composition. The content of the component (E) is preferably 4 to 7% by mass, and more preferably 5 to 6% by mass in the cleaning composition.

  The detergent composition used in the present invention preferably has an aqueous solution diluted 20 times (mass basis) with water, that is, a 5 mass% aqueous solution having a pH at 20 ° C. of 11.5 or more. Here, the value of pH is a value measured using pH METER F-21 (manufactured by Horiba, Ltd.). It is preferable to use the component (E) so as to achieve this pH.

<Water>
The cleaning composition used in the present invention contains water. The balance other than the components (A) to (E) can be water. As the water, ion exchange water preferably containing no hardness component can be used.

<Other matters>
As long as the detergent composition used in the present invention does not inhibit the desired effect of the present invention, other surfactants, chelating agents, foam increasing agents, hydrotropes, coloring agents, fragrances, builders, rust inhibitors, You may contain arbitrary components, such as a viscosity modifier.

  The cleaning composition used in the present invention is preferably liquid in the temperature range of 10 ° C to 60 ° C. Specifically, in the range of 10 ° C. to 60 ° C., preferably 20 ° C., the viscosity is 300 mPa · s or less, further 200 mPa · s or less, further 100 mPa · s or less, further 70 mPa · s or less, further 60 mPa · s or less, It is preferably 50 mPa · s or less, and more preferably 30 mPa · s. Here, the viscosity is adjusted by adjusting the temperature of the composition to 20 ° C., and using a B-type viscometer (manufactured by TOKIMEC), NO. It can be measured with one rotor. By selecting the number of rotations according to the viscosity of the composition, for example, the viscosity range of 1 to 100 mPa · s can be measured in units of 1 mPa · s at a rotation number of 60 rpm, and the viscosity range of 10 to 1000 mPas at a rotation number of 6 rpm. -About s, it can measure in a unit of 10 mPa · s.

  The detergent composition used in the present invention does not impair the solution stability even at 10 ° C. or lower, and further maintains transparency without freezing even in an environment of 0 ° C. or lower and thus −5 ° C. preferable.

  The method for preparing the cleaning composition used in the present invention is not particularly limited. For example, the raw materials (amine oxide, fatty acid, water, etc.) excluding the oxidizable halide are brought to a temperature of 40 to 80 ° C. After obtaining a uniform transparent mixed solution, it is gradually cooled, and after confirming that it has become 40 ° C. or lower, it can be prepared by blending an oxidizing halogenate.

<Foam cleaning method>
In the foam cleaning method of the present invention, the predetermined detergent composition has a mesh number and a wire diameter defined by JIS G3555 (: 2004) of 40 mesh or more, 60 mesh or less, and 0.15 mm or more, respectively. Using a former having an aspirator structure attached to the injection port, a net of 0.25 mm or less is foamed at a dilution rate of 12 times or more and 130 times or less at a water amount of 1 L / min to 20 L / min. Apply to things.

  The material of the net is not particularly limited, and examples thereof include metals, resins, ceramics, glass fibers, and carbon fibers. Examples of the metal include stainless steel, copper, brass, and aluminum. Examples of the resin include nylon, PET, polyethylene, polypropylene, and Teflon (registered trademark). Examples of stainless steel include SUS304, SUS316, SUS316L, SUS310S, and SUS420J2, and SUS304 is preferable in terms of chemical resistance.

  The number of meshes defined by JIS G3555 (: 2004) is 40 mesh or more and 60 mesh or less for the net attached to the foamer jet used in the foam cleaning method of the present invention. Moreover, the net | network diameter defined by JIS G3555 (: 2004) is 0.15 mm or more and 0.25 mm or less for the net | network with which the net | network with which the former used for the foaming washing | cleaning method of this invention is mounted | worn. The diameter (inner diameter) of the injection port is preferably 10 mm or more, more preferably 15 mm or more, further 20 mm or more, and 50 mm or less, further 4 mm or less, and further preferably 30 mm or less. The shape and size of the mesh can be appropriately selected according to the diameter of the injection port.

  The former used in the foam cleaning method of the present invention has an aspirator structure. Examples of the former having an aspirator structure include a Hydro Foamer Series former (for example, Model 481, 482, etc.) manufactured by Hydro Systems Company.

  The foamer used in the foam cleaning method of the present invention includes a container for a liquid detergent composition, means for mixing the liquid detergent composition in the container and water from the outside, and a liquid detergent composition And means for foaming a mixture of water and an opening for injecting the foamed mixture. The aspirator structure functions as part of a means for mixing the liquid detergent composition and external water. The net functions as part of the means for foaming the mixture of liquid detergent composition and water. Further, the former includes a flow path for water, a flow path for the liquid detergent composition, a flow path for a mixture of water and the liquid detergent composition, and means for supplying air from the outside. The former used in the foam cleaning method of the present invention preferably includes a mechanism through which water can flow, and the water flow path preferably constitutes an aspirator structure.

  FIG. 1 shows a partial schematic view of a former having an aspirator structure used in the foam cleaning method of the present invention. FIG. 1 is a schematic view of the nozzle portion of the former, and a predetermined net satisfying the conditions of the present invention is attached to the nozzle at the tip of the nozzle portion. A suction pipe for a stock solution of the cleaning composition is connected to the nozzle part, a filter is attached to an end of the suction pipe, and the end is washed in a container (not shown). Inserted into the stock solution of the agent composition. In the nozzle portion, the diameter of the tap water flow path passing through the suction pipe is fluctuated, and a pressure difference is caused by the circulation of the tap water, whereby the stock solution of the cleaning composition is sucked up into the flow path. Mixed with tap water. At that time, the flow rate of the cleaning composition can be adjusted by the orifice tip attached to the suction pipe, and the dilution rate can be adjusted based on the flow rate of tap water. The dilution of the detergent composition mixed with tap water is mixed with air, passed through a net of an injection port, is foamed, and is applied to an object.

  In the foam cleaning method of the present invention, the stock solution of the cleaning composition is placed in a stock solution container (container) of a former having an aspirator structure, the stock solution suction pipe of the aspirator is connected to a tap with a hose, and the liquid is supplied by the water pressure of the tap. It is preferable to flow and foam.

  In the foam cleaning method of the present invention, the amount of water flowing through the former is 1 L / min or more and 20 L / min or less, and the dilution rate is 12 times or more and 130 times or less. The amount of water circulating in the former is preferably 18 L / min or less, more preferably 16 L / min or less. The amount of water is preferably 1 to 18 L / min, more preferably 1 to 16 L / min. The variation in the amount of water during washing is preferably in the range of 1 to 20% of the amount of water. The dilution factor is preferably 100 times or less, more preferably 80 times or less, further 60 times or less, and further preferably 40 times or less. The dilution factor is preferably 12 to 100 times, more preferably 12 to 80 times, still more preferably 12 to 60 times, and still more preferably 12 to 40 times.

In the foam cleaning method of the present invention, the method of applying the cleaning composition to the object by a former may be continuous, intermittent, or intermittent. The application amount of the cleaning composition per 1 m ^{2 of} cleaning area is preferably 15 g or more, further 20 g or more, further 30 g or more, 80 g or less, further 50 g or less, and further 40 g or less.

  In the foam cleaning method of the present invention, it is preferable to perform a rinsing step after the step of adhering foam to the object and the step of holding for a certain time. The holding time is preferably 1 minute or longer from the viewpoint of workability, and is preferably 60 minutes or shorter, further 45 minutes or shorter, further 30 minutes or shorter, further 20 minutes or shorter, and further 15 minutes or shorter. The holding time is preferably 1 to 60 minutes, more preferably 1 to 45 minutes, and still more preferably 1 to 30 minutes from the viewpoint of workability. Furthermore, 1 to 20 minutes is preferable, and 1 to 15 minutes is more preferable. On the other hand, from the viewpoint of detergency, the holding time is preferably 10 minutes or more, more preferably 15 minutes or more, and further preferably 20 minutes or more, and preferably 60 minutes or less, further 45 minutes or less, and further 30 minutes or less. Further, from the viewpoint of detergency, the holding time is preferably 10 to 60 minutes, more preferably 15 to 45 minutes, and still more preferably 20 to 30 minutes.

  While it is preferable to leave it while holding the foam, it is possible to add a little water or the like.

  In the rinsing step, it is preferable to rinse with water. The temperature of the rinsing water is preferably 10 to 70 ° C, more preferably 20 to 70 ° C. As the rinsing water, tap water can be used, and the rinsing water may be heated and used to adjust to the preferable water temperature. Generally, a rinsing operation by a human hand is performed with a hose or the like.

  Examples of the object of the foam cleaning method of the present invention include equipment such as food processing equipment and cooking equipment, and equipment selected from food processing equipment and cooking equipment is suitable. More specifically, floors, walls, work tables, ceilings, etc. can be mentioned. Moreover, the objects of the foam cleaning method of the present invention may include buildings, structures, and the like in which these facilities are accommodated. Further, the object of the foam cleaning method of the present invention may include articles such as equipment and instruments used in these facilities.

  The foam cleaning method of the present invention is excellent in the foaming property at the time of such rinsing, and requires a small amount of rinsing water as compared with the conventional foam cleaning method, and is economically advantageous, and the work load (work time) And the number of workers) and environmental load are significantly reduced.

  Using the cleaning composition described in Table 1, (1) repeated spray test, (2) foam cleaning test, and (3) rinsing test when sprayed on the floor were carried out by the following methods. Are listed in Table 1. Moreover, the pH at 20 ° C. of a 5% by mass aqueous solution of the cleaning composition was also measured by the following method and listed in Table 1.

(1) Repeated injection test The repeated injection test was done using the handy former (Hydoro Systems Company, Hydro Foamer Model 483AP) which has an aspirator structure.

  Place 1000 g of the cleaning composition in a stock container (also called a pot), attach a yellow Metering tip kit (orifice with a dilution factor of 42: 1 as described in the catalog), and have a German hardness of 6 ° dH (Ca: Mg = 7 : The faucet adjusted to 3) and the inlet of the aspirator were directly connected with a hose, and a spray gun was connected.

  When the spray gun was operated, the suction amount of the cleaning composition (stock solution) was 135 g / 20 seconds, and the flow rate of water was 6 L / min. Therefore, the dilution factor was 15.8 times.

The continuous injection for 1 minute and the stop of the injection for 1 minute and 30 seconds were alternately repeated, and injection was performed 9 times. After the last injection, the injection port was not rinsed and left at room temperature (25 ° C.) for 24 hours. This was repeated as one cycle, the number of cycles at which good quality bubbles could be ejected was evaluated, and the results are shown in Table 1. The high-quality foam in this test is a foam that forms a fine foam film that is not watery by visual observation. In addition, when it became impossible to inject a good quality bubble in the middle of one cycle, it was determined that the cycle could not be injected.
In Comparative Example 1, water-like bubbles were formed at the third time in the fourth cycle, and fine bubbles could not be formed.

(2) Foam cleaning test The following foam cleaning test was modeled on foam cleaning when using a former having an aspirator structure.

  10 μg of 0.1% Sudan III-containing rapeseed oil was applied to a standard test plate (SUS304, 1.0 mm × 30 mm × 80 mm, manufactured by Test Panel Co., Ltd.), and this was used as a washing model test plate.

  A 5% aqueous solution of the cleaning composition is prepared by preparing 5 g of the cleaning composition in 100 g of hard water having a German hardness of 4 ° dH. The foam was formed by pushing the former head 1 time (generating 1 g of foam per push, with a foaming ratio of 20 times), and applied to the cleaning model test plate.

The coating was left for 10 minutes, rinsed with tap water, dried, the amount of residual oil was measured by hexane extraction, and the washing rate (%) was calculated by the following formula.
Cleaning rate (%) = 100 × [(applied oil amount) − (residual oil amount)] / (applied oil amount)

(3) Rinse test when sprayed on floor A rinse test was performed using a handy former having aspirator structure (Hydro Systems Company, Hydro Foamer Model 483AP).

  Place 1000g of cleaning composition in pot, attach yellow Metering tip kit (orifice tip with catalog value dilution ratio 42: 1), tap tap water tap and aspirator entrance with water of 4 ° dH German hardness Directly connected with a hose and connected with a spray gun.

  The amount of the suction agent in the stock solution of the actual cleaning composition was 135 g / 20 seconds, and the flow rate of water was 6 L / min. Therefore, the dilution factor was 15.8 times.

  A weir is provided on the floor and sprayed on a rectangular floor portion of 1 m × 2 m for 10 seconds. Foam is adhered to the entire floor portion, left for 5 minutes, and then rinsed with tap water at a flow rate of 15 L / min. The rinsing time until the foam was completely eliminated was measured and the value is shown in Table 1.

<PH at 20 ° C. of 5 mass% aqueous solution>
A 5-fold diluted solution (5% by mass aqueous solution) of the cleaning composition was prepared by using 5 g of the cleaning composition as a 100-g solution in ion-exchanged water. The pH at 20 ° C. was measured with a pH measuring device (HORIBA: PH METER F-22).

* 1 The numerical values in the table are converted amounts as oxidizing halogen acid (hypochlorous acid), and the values in parentheses are the amount of oxidizing halogen acid salt (sodium hypochlorite) charged.
* 2 Isobutylene / maleic acid copolymer molar ratio 1/1, weight average molecular weight 12000
* 3 The test was not continued because high-quality foam was injected at the end of the last injection in the 4th cycle. However, if high-quality foam can be injected more than one cycle from the state of the last sprayed foam. It was judged.

Claims (7)

(A) 0.5% by mass or more and 10% by mass or less of one or more compounds selected from oxidative halogen acids and salts thereof (however, in the case where an oxidative halogen acid salt is included, an equivalent amount as oxidative halogen acid) ),
(B-1) 0.5% by mass or more and 1.5% by mass or less of amine oxide having one hydrocarbon group having 8 carbon atoms,
(B-2) 2% by mass or more and 4% by mass or less of amine oxide having one hydrocarbon group having 12 carbon atoms,
(C-1) 1% by mass or more and 2% by mass or less of one or more compounds selected from fatty acids having a hydrocarbon group having 12 carbon atoms and salts thereof,
(C-2) 0.2 mass% or more and 0.8 mass% or less of one or more compounds selected from fatty acids having a hydrocarbon group having 14 carbon atoms and salts thereof,
(D) 2% by mass or more and 4% by mass or less of a copolymer of olefin having 4 to 8 carbon atoms and maleic acid,
(E) 3% by mass or more and 8% by mass or less of alkali metal hydroxide, and
A cleaning composition containing water,
A mesh in which the number of meshes defined by JIS G3555 (: 2004) is 40 mesh or more and 60 mesh or less and the wire diameter defined by JIS G3555 (: 2004) is 0.15 mm or more and 0.25 mm or less. A foam cleaning method in which foam is applied to an object by foaming at a dilution rate of 12 times or more and 130 times or less at a water amount of 1 L / min or more and 20 L / min or less using a former having an aspirator structure attached to an injection port .   The mass ratio (B-2) / (B-1) of the content of the component (B-1) and the content of the component (B-2) in the cleaning composition is 2.5 or more and 3.5 or less. The foam cleaning method according to claim 1.   The mass ratio (C-1) / (C-2) of the content of the component (C-1) and the content of the component (C-2) in the cleaning composition is 2.5 or more and 3.5 or less. The foam cleaning method according to claim 1 or 2, wherein:   Mass ratio of total content (B) of (B-1) component and (B-2) component (B), (C-1) component, and (C-2) component in said cleaning composition The foam cleaning method according to any one of claims 1 to 3, wherein (B) / (C) is 1.5 or more and 2.5 or less.   Content of component (A) in the cleaning composition, and total content of component (B-1), component (B-2), component (C-1), and component (C-2) (B + C) The foam cleaning method according to any one of claims 1 to 4, wherein the mass ratio (A) / (B + C) is 0.2 to 0.8.   The foam cleaning method according to any one of claims 1 to 5, wherein the object is an equipment selected from food processing equipment and cooking equipment. Used in the foam cleaning method according to any one of claims 1 to 6.
(A) 0.5% by mass or more and 10% by mass or less of one or more compounds selected from oxidative halogen acids and salts thereof (however, in the case where an oxidative halogen acid salt is included, an equivalent amount as oxidative halogen acid) ),
(B-1) 0.5% by mass or more and 1.5% by mass or less of amine oxide having one hydrocarbon group having 8 carbon atoms,
(B-2) 2% by mass or more and 4% by mass or less of amine oxide having one hydrocarbon group having 12 carbon atoms,
(C-1) 1% by mass or more and 2% by mass or less of one or more compounds selected from fatty acids having a hydrocarbon group having 12 carbon atoms and salts thereof,
(C-2) 0.2 mass% or more and 0.8 mass% or less of one or more compounds selected from fatty acids having a hydrocarbon group having 14 carbon atoms and salts thereof,
(D) 2% by mass or more and 4% by mass or less of a copolymer of olefin having 4 to 8 carbon atoms and maleic acid,
(E) 3% by mass or more and 8% by mass or less of alkali metal hydroxide, and
A cleaning composition containing water.

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