JP2007209946A - Washing method of textile good for cleaning work - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a washing method of textile goods for cleaning work, in which the washed textile goods are not soiled again and which is excellent in detergency and flocculating and settling properties when textile goods such as a mat and a mop are washed. <P>SOLUTION: The washing method of textile goods for cleaning work comprises at least one washing step of washing textile goods for cleaning work by using a surfactant-containing washing medium. At at least one of all washing steps, sodium or potassium salt ((A) component) of a 14-22C fatty acid is used. At all the washing steps, a nonionic surfactant ((B) component) is used. The weight ratio of the total amount of the (A) component to that of the (B) component in the washing medium to be used at all the washing steps is within a specified range. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a method for cleaning textile products and a cleaning composition, and in particular, for textile products used in the field of dust control, for example, entrance mats and floor mats for stores, offices, hotels, etc., or cleaning mops for floor cleaning, etc. The present invention relates to a method for cleaning textile products and a cleaning composition.

  In the field of dust control that captures and retains fine particle dirt such as oil, mud, and dust to improve the living environment, oil-impregnated cleaning that includes fibers such as mop cloth and mats impregnated with oil for capturing and retaining dust Tools are used. Specifically, entrance mats and floor mats used in stores, offices, hotels, etc., mops for floor cleaning, and the like are listed.

  These oil-containing cleaning tools are usually used repeatedly through a series of steps of use-cleaning-oil agent processing (regeneration processing). Such repeated use is very important from the viewpoint of preventing environmental pollution, waste of resources, and the like that are currently a worldwide problem.

  In such an oil-containing cleaning tool, a large amount of dirt such as mud coexists, and the mat and mop are coated with an oil mainly composed of liquid paraffin to adsorb the dirt. For removal, it is necessary to use a large amount of detergent. However, the chemical cost required for waste water treatment and the treatment cost of a large amount of sludge generated therefrom are incurred, resulting in a very high cost burden.

From this background, Patent Document 1 discloses a detergent composition containing a non-soap anionic surfactant, an inorganic salt, and a divalent metal ion scavenger and substantially free of phosphate and aluminosilicate. Has been. Patent Document 2 discloses a method for cleaning a textile product for cleaning using a cleaning medium containing a nonionic surfactant and a water-soluble chelating agent and having a total amount of alkali metal silicate and the like in a predetermined range. ing.
Japanese Patent Laid-Open No. 2002-194397 JP 2005-272577 A

  However, Patent Document 1 seeks to obtain a cleaning composition that can prevent troubles such as prevention of powder adhesion to a detergent manufacturing apparatus and blockage of piping and valves of a washing apparatus such as a continuous washing machine, It is not sufficient to improve the coagulation-precipitation property, cleaning property and recontamination prevention property in a well-balanced manner. On the other hand, Patent Document 2 does not mention improvement of aggregation and precipitation properties.

  The problem of the present invention is that re-contamination occurs when washing textile products used in the field of dust control, for example, cleaning textile products such as store mats, floor mats, floor cleaning mops, etc. An object of the present invention is to provide a cleaning method which is less and has excellent cleaning properties and is excellent in coagulation sedimentation properties.

The present invention is a cleaning method for cleaning textile products comprising at least one cleaning step of cleaning the cleaning textile products using a cleaning medium containing a surfactant,
A sodium salt or potassium salt of a fatty acid having 14 to 22 carbon atoms (hereinafter referred to as component (A)) is used in at least any of the cleaning steps, and a nonionic surfactant (hereinafter referred to as (B) is used in all cleaning steps. The weight ratio of the total amount (X) of the component (A) and the total amount (Y) of the component (B) in the cleaning medium used in all cleaning steps is (X) / (Y). = 1/8 to 1 / 2.2,
The present invention relates to a method for cleaning a textile product for cleaning.

  According to the present invention, when a textile product used in the field of dust control, for example, a cleaning textile product such as a store mat, a floor mat, or a floor cleaning mop, is recontaminated. There is provided a cleaning method which is less and has excellent cleaning properties and is excellent in coagulation sedimentation properties.

  In the cleaning method of the present invention, the ratio (X) / (Y) of the total amount of the component (A) and the component (B) used for cleaning in order to perform efficient cleaning and wastewater treatment on the textile product for cleaning. In addition, by selecting and using a surfactant excellent in biodegradability represented by soap, wastewater treatment costs can be reduced.

  Examples of the textile product to be subjected to the cleaning method of the present invention include textile products used in the field of dust control, such as textile products for cleaning such as entrance mats and floor mats in stores, offices, hotels, etc., or mops for floor cleaning. Furthermore, cleaning fiber products, cleaning oil-containing fiber products, cleaning mats, cleaning oil-containing mats, cleaning oil-containing mops, and the like can be mentioned. In general, since these textile products have a very large amount of dirt, they require a large amount of detergent and chemicals related to wastewater treatment (coagulation sedimentation, coagulation pressure floating, biological treatment, etc.). Therefore, in the present invention, in order to perform efficient cleaning and wastewater treatment, the ratio (X) / (Y) of the total amount of the component (A) and the component (B) used for cleaning is specified, and the soap is used. It is characterized by selecting and using a surfactant having excellent biodegradability as represented.

  The cleaning method of the present invention improves the coagulation sedimentation property / coagulation pressure flotation / biological treatment property by limiting the ratio of the detergent components to be drained, particularly the surfactant, regardless of the cleaning process, and the waste water treatment cost is reduced. This is useful as a cleaning method for cleaning textiles that can be reduced.

  Among the cleaning media used in the present invention, those used in at least one of all the cleaning steps contain a sodium salt or potassium salt (component (A)) of a fatty acid having 14 to 22 carbon atoms. The fatty acid may be a saturated fatty acid or an unsaturated fatty acid.

  As the component (A), an alkali metal salt of a fatty acid having 16 to 18 carbon atoms is preferable. Specifically, a sodium salt or potassium salt such as caprylic acid, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid or the like. Is preferred.

  In the present invention, a non-soap anionic surfactant (hereinafter referred to as “component (C)”) can be used in at least one of all washing steps. As the component (C), linear alkylbenzene sulfonates, α-olefin sulfonates, alkyl sulfates, and the like. Examples of the salts include alkali metal salts, alkaline earth metal salts, organic amine salts, and the like. It can be used alone or in combination of two or more. Of these, alkyl sulfates, particularly alkyl sulfates having 8 to 22 carbon atoms such as sodium salt, potassium salt, triethanolamine salt or ammonium salt are preferred from the viewpoints of biodegradability and coagulation sedimentation.

Moreover, all the washing | cleaning media used for this invention contain nonionic surfactant [(B) component]. (B) As a nonionic surfactant of a component, the nonionic surfactant represented by the following general formula (I) is preferable.
_{^{R 1 -O- (EO) p -}} (PO) q - (EO) r -H (I)
[Wherein, R ¹ represents an alkyl group or alkenyl group having an average carbon number of 8 to 18, EO represents an oxyethylene group, and PO represents an oxypropylene group. p, q, and r each represent an average added mole number, and p ≧ 0, r ≧ 0, q = 0.5 to 5, and p and r are not 0 at the same time. ]

In the general formula (I), R ¹ is preferably an alkyl group having 10 to 14 carbon atoms, an alkenyl group, and further an alkyl group, p is preferably 1 to 10, particularly 2 to 8, and q is 0.5 to 5. Yes, 1 to 4.5, particularly 1 to 2 is preferable, r is preferably 1 to 10, particularly 2 to 8, and p + r is preferably 1 to 30, more preferably 2 to 20, particularly 4 to 15. Specific examples of the nonionic surfactant of the general formula (I) include polyoxyethylene (3) polyoxypropylene (1.5) polyoxyethylene (3) lauryl ether, polyoxyethylene (5) polyoxypropylene (1 .5) Polyoxyethylene (5) lauryl ether, polyoxyethylene (5) polyoxypropylene (4.5) polyoxyethylene (5) lauryl ether, and the like. Here, regarding the said compound, the inside of () is the average addition mole number of ethylene oxide or propylene oxide (the same applies hereafter). Two or more nonionic surfactants can be used.

  The cleaning medium used in the present invention is based on the cleaning medium used in all cleaning steps, and the weight ratio of the total amount (X) of the component (A) to the total amount (Y) of the component (B) [(X) / (Y)] is 1/8 to 1 / 2.2. Preferably it is 1/5 to 1 / 2.5. If the weight ratio (X) / (Y) is less than 1/8, ionicity is insufficient and aggregation is difficult. On the other hand, if the (X) / (Y) weight ratio is more than 1 / 2.2, the washability at the time of washing deteriorates, and the amount of anions becomes excessive and necessary in coagulation precipitation and coagulation pressure floating. The amount of inorganic flocculant, its neutralizer, and polymer flocculant increases, and the amount of sludge discharged increases.

  Further, the cleaning medium used in the present invention, preferably the cleaning medium containing the component (A), can further contain the component (C) from the viewpoint of biodegradability and coagulation sedimentation. Based on the cleaning medium used in the process, the weight ratio of the total amount (Z) [(A) + (C)] of component (A) and component (C) to the total amount of component (B) (Y) [( Z) / (Y)] is preferably 1/8 to 1 / 2.2, particularly preferably 1/5 to 1 / 2.5.

  The cleaning medium used in the present invention can contain a chelating agent. Chelating agents include ethylenediaminetetraacetic acid, hydroxyethylethylenediaminetriacetic acid, diethylenetriaminepentaacetic acid, nitrilotriacetic acid, triethylenetetraminehexaacetic acid, phosphonic acid, tripolyphosphoric acid, ethylene glycol bis- (2-aminoethyl ether) tetraacetic acid, citric acid , Maleic acid, DL-alanine-N, N-diacetic acid, aspartic acid-N, N-diacetic acid, glutamic acid-N, N-diacetic acid, serine-N, N-diacetic acid, polyacrylic acid, isoamylene-malein Examples include acid copolymers, acrylic acid-maleic acid copolymers, acrylic acid-methacrylic acid copolymers, silicic acid, gluconic acid, hydroxybenzylimidinoacetic acid, imidinoacetic acid, and salts thereof. The salt is preferably an alkali metal salt such as sodium salt or potassium salt, an alkanolamine salt such as triethanolamine salt, or an ammonium salt.

  In addition to the above components, the cleaning medium used in the present invention includes (1) alcohols such as ethanol and glycols such as ethylene glycol and propylene glycol, (2) paratoluenesulfonic acid or a salt thereof, benzoic acid or a salt thereof, urea (3) Polyoxyalkylene benzyl ether, polyoxyalkylene phenyl ether for phase adjustment and improvement of detergency, (4) Polyvinyl Contains a color transfer inhibitor such as pyrrolidone, (5) fluorescent dye, (6) silicone for imparting flexibility, (7) silica as an antifoaming agent, silicone, (8) fragrance, antibacterial preservative, etc. be able to.

<Washing process>
The washing | cleaning method of this invention has the washing | cleaning process of making the said specific washing | cleaning medium contact with the textile product for cleaning, and wash | cleaning. Single or plural cleaning media are used. Finally, in the cleaning method of the present invention, (A) component (A) is used in at least one of all cleaning steps, and (B) all cleaning is performed. (A) component and (B) component are contained so that (B) component may be used in a process.

  That is, in the present invention, the cleaning medium includes the component (B) in all cleaning steps, and the component (A) and the component (B) are used in any cleaning step. That is, when the cleaning process is performed once, the cleaning medium contains both the component (A) and the component (B). In addition, when there are a plurality of cleaning steps, the cleaning medium used in all cleaning steps includes the component (B), and the cleaning medium used in at least any of the cleaning steps includes the component (A). As a result of performing all the washing steps, both the component (A) and the component (B) are applied.

  When the cleaning medium contains both the component (A) and the component (B), the component (A) is preferably contained in an amount of 0.001 to 0.5% by weight, more preferably 0.002 to 0.2% by weight, (B) It is preferable to contain 0.01 to 1 weight% of component, and also 0.02 to 0.2 weight%. In the cleaning medium containing the component (B) and not containing the component (A), the content of the component (B) is preferably 0.01 to 1% by weight, more preferably 0.02 to 0.2% by weight. . Furthermore, a cleaning medium containing the component (A) and the component (C) can also be used. In any case, the cleaning medium preferably contains 0.0001 to 0.2% by weight, more preferably 0.0005 to 0.2% by weight, of a water-soluble chelating agent. In any case, the cleaning medium preferably contains 90% by weight or more, more preferably 95% by weight or more of water.

  The weight ratio of the component (A) to the component (C) is based on the cleaning medium used in all cleaning steps. The component (A) / (C) component = 100/0 to 50/50, and further 100/0. 30/70 is preferred.

  In addition, the component mix | blended with a washing | cleaning medium may be added collectively, or may be added separately.

  In the present invention, in terms of preventing recontamination, the cleaning medium is preferably brought into contact with the textile product at a temperature of less than 70 ° C., more preferably at 50 to 60 ° C. from the viewpoint of preventing recontamination while maintaining cleanability.

  The pH of the cleaning medium is preferably 11 or less at the cleaning temperature, and further preferably 8 to 10.8, particularly 8 to 10 from the viewpoint of preventing recontamination.

  The cleaning method of the present invention includes at least one cleaning step as described above. However, when it has a plurality of cleaning steps, the (X) / (Y) weight ratio through all the cleaning steps, more preferably (Z ) / (Y) The cleaning medium is used so that the weight ratio is within the range of the present invention. In general, in the field of dust control, recovered fiber products are reused through processing steps such as sand removal, preliminary cleaning, main cleaning, dyeing, and oil impregnation. Applicable to cleaning and main cleaning. The plurality of cleaning media used in the plurality of cleaning steps may have the same composition or different compositions. The cleaning medium used for the main cleaning can further contain a considerable amount of an alkali agent such as sodium metasilicate and soda ash.

Examples 1-5 and Comparative Examples 1-4
Using the cleaning medium shown in Table 1, the anti-contamination property, the cleaning property, and the coagulation sedimentation property were evaluated by the following methods. The results are shown in Table 1.

(1) Recontamination prevention property A cotton cloth was cut into 6 cm × 6 cm and impregnated with mineral oil having a viscosity of 140 mPa · s at 25 ° C. to prepare a prepared cloth. At 60 ° C. and 1 L of tap water, the components shown in Table 1 are added at the ratios, and used as a cleaning medium. A contaminated liquid was prepared by stirring and dispersing. The prepared cloth was put into this contaminated liquid, and washed with a talometer (rotation speed: 80 rpm / min) at 60 ° C. for 5 minutes, rinsed for 1 minute, dehydrated, and press dried. The test white cloth after washing was visually observed and evaluated according to the following criteria.

(Double-circle): Dirt has not adhered.
○: Some dirt adheres.
Δ: Dirt adheres to some extent ×: Dirt adheres clearly.

(2) Cleanability Cotton white cloth was cut into 6 cm × 6 cm, impregnated with mineral oil having a viscosity of 140 mPa · s at 25 ° C., and Kanuma red soil was further adhered to prepare a contaminated cloth. Thereafter, a cleaning medium was prepared in the same manner as in the evaluation of the anti-recontamination property, followed by cleaning with a talometer (rotation speed 80 rpm / min) at 60 ° C. for 5 minutes, rinsing 1 minute, dehydration, and press drying. The contaminated cloth after washing and drying was visually observed and evaluated according to the following criteria.
A: Clear removal of dirt is clearly seen.
○: Dirt removal is understood.
X: Dirt removal is not known.

(3) Coagulation-sedimentability test The coagulation-sedimentability test was performed using the washing | cleaning medium after completion | finish of washing | cleaning by evaluation of the washability of said (2). First, 1 L of each cleaning medium after washing (temperature 20 ° C.) is stirred, a sulfuric acid band is added to 2000 ppm, the pH is set to about 5, and then the pH is adjusted to 7.0 with a 1% aqueous sodium hydroxide solution. It was. Furthermore, 1000 ppm of polyacrylamide (weight average molecular weight of about 11 million) was added as a flocculant, and after stirring for 5 minutes, the liquid after standing for 5 minutes was observed and evaluated according to the following criteria.
(Double-circle): It aggregates and separates completely and the liquid part is transparent.
○: Aggregated and separated, and the liquid part is almost transparent.
(Triangle | delta): Although it carries out aggregation separation, the liquid part is a cloudy state.
X: No aggregation and separation, and the whole liquid is in a suspended state.

Nonion (1): In general formula (I), R ¹ is a lauryl group, p is 3, q is 1.5, and r is 3. Nonion (2): In general formula (I), R ¹ is Lauryl group, p = 5, q = 1.5, r = 5 ・ Soap: Kao Co., Ltd., lunar star low-temperature soap (saturated, unsaturated fatty acid sodium salt with 16 to 18 carbon atoms) 50% by weight), the numerical values in the table are the weight% of the effective part.
-Anion (1): Sodium lauryl sulfate, the numerical value in a table | surface is the weight% of an effective part.

Examples 6-10 and Comparative Examples 5-7
Using the cleaning media shown in Table 2, the cleaning properties and coagulation sedimentation properties were evaluated by the following methods. The results are shown in Table 2. The common components in Table 2 are the same as those in Table 1. The (X) / (Y) weight ratio and (Z) / (Y) weight ratio in Table 2 are ratios based on the entire cleaning medium.

(1) Cleanability Cotton white cloth was cut into 6 cm × 6 cm, impregnated with mineral oil having a viscosity of 140 mPa · s at 25 ° C., and Kanuma red soil was further adhered to prepare a contaminated cloth. The components of the first cleaning medium shown in Table 2 were charged at 60 ° C. and 1 L of tap water in this ratio to obtain a first cleaning medium, and a second cleaning medium was prepared in the same manner. The contaminated cloth is washed with a first washing medium at 60 ° C. for 5 minutes with a tartometer (rotation speed: 80 rpm / min), and then the cloth is lightly squeezed, then washed with the second washing medium in the same manner, and then rinsed. Dehydration and press drying were performed for 1 minute. The contaminated cloth after washing and drying was visually observed and evaluated according to the same criteria as in Example 1 and the like.

(2) Coagulation sedimentation test The coagulation sedimentation test was conducted using the first and second cleaning media after the cleaning was completed in the evaluation of the cleaning performance of (1). The first and second washing media after washing were mixed, 1 L was taken from the mixed solution as a sample, and the aggregation and precipitation properties were evaluated in the same manner as in Example 1 and the like.

Claims (4)

A cleaning fiber product cleaning method comprising at least one cleaning step of cleaning the cleaning fiber product using a cleaning medium containing a surfactant,
A sodium salt or potassium salt of a fatty acid having 14 to 22 carbon atoms (hereinafter referred to as component (A)) is used in at least any of the cleaning steps, and a nonionic surfactant (hereinafter referred to as (B) is used in all cleaning steps. The weight ratio of the total amount (X) of the component (A) and the total amount (Y) of the component (B) in the cleaning medium used in all cleaning steps is (X) / (Y). = 1/8 to 1 / 2.2,
Cleaning method for textile products for cleaning.   Furthermore, a non-soap anionic surfactant (hereinafter referred to as “component (C)”) is used in at least one of all washing steps, and the total amount (Z) of component (A) and component (C), and component (B) 2. The method for cleaning a textile product for cleaning according to claim 1, wherein the weight ratio of the total amount (Y) to (Z) is (Z) / (Y) = 1/8 to 1 / 2.2.   The method for cleaning a textile product for cleaning according to claim 2, wherein the non-soap anionic surfactant is a sodium salt, potassium salt, triethanolamine salt or ammonium salt of an alkyl sulfate having 8 to 22 carbon atoms. The method for cleaning a textile product for cleaning according to any one of claims 1 to 3, wherein the nonionic surfactant is a nonionic surfactant represented by the following formula (I).
_{^{R 1 -O- (EO) p -}} (PO) q - (EO) r -H (I)
[Wherein, R ¹ represents an alkyl group or alkenyl group having an average carbon number of 8 to 18, EO represents an oxyethylene group, and PO represents an oxypropylene group. p, q, and r each represent an average added mole number, and p ≧ 0, r ≧ 0, q = 0.5 to 5, and p and r are not 0 at the same time. ]