JP2001198065A - Cleaning sheet for floor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wet type cleaning sheet for a floor used by being mounted to a mop-like cleaning tool and capable of removing stains and dust on the floor without performing wiping twice, lowering a cost and collecting hair and fluffy dust as well. SOLUTION: This cleaning sheet 1 impregnated with water detergent is used by being mounted to a cleaning part 11 in the cleaning tool 10 provided with the cleaning part 11 and a bar-shaped handle 12 connected to the cleaning part 11. The water detergent does practically contain water-insoluble solid particles and is impregnated for 100-1,000 wt.% per sheet weight (dry standard) and viscosity at 25 deg.C is 20-3,000 mPa.s.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a replaceable cleaning sheet which is used by being attached to a mop-shaped cleaning tool, and more particularly to dust on the floor, hair, solid debris, and the like.
The present invention relates to a household or business wet floor cleaning sheet used for removing stains and the like, and for cleaning and care of the floor such as protection and polishing of the floor.

[0002]

2. Description of the Related Art In the field of dry cleaning for removing soil dust and cotton dust on floors, tufted mop-type or replaceable sheet-type mop-type cleaners in which fibers are treated with an oil agent are used. It is known as a cleaning tool that can easily clean a wide area floor. However, this type of cleaning tool did not remove stains on the floor and did not sufficiently remove dirt and dust.

[0003] Conventionally, floor stains, soil dust, and the like have been cleaned by bending down using a squeezed wet cloth. In addition, the floor is protected and polished with a wax cloth included in a dry rag, towel or the like, and the floor is bent down in the same manner as the floor cleaning described above. For example, utility model registration No. 25
As described in the specification of Japanese Patent No. 16320, a cleaning sheet of a type in which a cleaning agent is impregnated and wiped directly by hand is known. However, it has been difficult to achieve both the cleanability of stains on the floor and the operability of wiping lightly with one hand, even when this is mounted on a mop-shaped cleaning tool for cleaning.

[0004] Japanese Patent Publication No. 11-508256 also discloses a cleaning sheet of a type in which a cleaning agent is impregnated and wiped directly by hand. The cleaning sheet has long fibers that can protrude from the sheet surface as a result of the rubbing operation. However, when this cleaning sheet is attached to a mop-shaped cleaning tool for cleaning, the long fibers may catch on projections on the floor and break the sheet. Furthermore, the above-mentioned publication describes that when impregnated with an aqueous cleaning agent, it is preferable that the sheet is made of hydrophobic fibers, but in that case, the sheet is attached to a mop-shaped cleaning tool. When cleaning, there is no sustained cleaning over a large area due to too much detergent at the beginning of wiping. Furthermore, the removal of stains and dirt is not sufficient.

[0005] Therefore, in particular, in the case of a disposable replacement sheet type product, Japanese Patent Application Laid-Open No. 10-262883,
JP-A-10-286206 and Japanese Patent No. 2915
As described in the specification of Japanese Patent No. 840, a method of performing cleaning while supplying a cleaning agent, water, or the like to a surface to be cleaned of a sheet or a floor is generally used. However, such a cleaning method is very troublesome, such as holding a cleaning agent in hand in addition to the mop-shaped cleaning tool, removing the sheet from the cleaning tool during cleaning, and getting wet with water. In addition, if the degree of squeezing after wetting with water is weak, the water may come out on the floor too early in the cleaning and spread dirt. In addition, if the handle is weak, such as a dry cleaning mop, the operability may be poor. Furthermore, crack damage such as cracks may occur on some wooden floors.

[0006] Japanese Patent Application Laid-Open No. Hei 10-287899 discloses that spherical particles having an average particle diameter of 0.01 to 15 μm
A sheet impregnated with a cleaning agent having a viscosity of 500 mPa · s is disclosed. This cleaning sheet is excellent in the effect of polishing and removing dirt on the cleaning surface and floating the dirt from the cleaning surface. However, it is necessary to perform an operation of wiping the dirt raised by a dry sheet or the like together with the spherical particles.

Accordingly, the present invention is used by being attached to a mop-shaped cleaning tool, which can remove stains and dirt on the floor without wiping twice, is inexpensive, and also collects hair and cotton dust. It is an object of the present invention to provide a wet floor cleaning sheet that can be used. It is another object of the present invention to provide a floor cleaning sheet that can clean a large area and can be operated lightly with one hand when used with a mop-shaped cleaning tool. A further object of the present invention is to provide a floor cleaning sheet capable of protecting and polishing a floor and removing bacteria.

[0008]

According to the present invention, there is provided a cleaning tool having a cleaning portion and a rod-shaped handle connected to the cleaning portion, the cleaning tool being impregnated with an aqueous cleaning agent for use by being attached to the cleaning portion. A floor cleaning sheet, wherein the aqueous detergent is substantially free of water-insoluble solid particles, is impregnated with 100 to 1000% by weight per sheet weight (dry basis), and has a viscosity at 25 ° C. The object has been achieved by providing a floor cleaning sheet having a pressure of 20 to 30000 mPa · s.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings. In FIG.
1 is a schematic perspective view of an embodiment of a floor cleaning sheet (hereinafter, simply referred to as a cleaning sheet) of the present invention.

The cleaning sheet 1 according to the present embodiment includes an inner layer 2,
This is a wet sheet constituted by impregnating an aqueous cleaning agent into a laminated sheet in which a pair of outer layers 3 sandwiching this from above and below is integrated.

The aqueous cleaning agent is impregnated with 100 to 1000% by weight based on the weight of the laminated sheet (that is, based on the weight of the unimpregnated (dry) cleaning sheet 1). Impregnation rate is 1
If the content is less than 00% by weight, sufficient cleaning performance against stains and soil dust cannot be obtained. If the amount exceeds 1000% by weight, the amount of the detergent released to the floor becomes too large, so that dirt and soil dust remain on the floor, which further adversely affects some wooden floors. From the viewpoint of further improving the cleanability, the impregnation rate of the aqueous detergent is preferably 150 to 350% by weight, particularly preferably 200 to 300% by weight. The impregnation rate of the aqueous cleaning agent into the laminated sheet is determined by impregnating the laminated sheet with the aqueous cleaning agent and removing the excess aqueous cleaning agent as it is or by mangle treatment or the like, and then based on the weight of the laminated sheet. Measured under load.

The laminated sheet (that is, the cleaning sheet 1 before being impregnated with the aqueous cleaning agent) has a basis weight of 40 to 200 g / g.
m ² is preferred. The basis weight of the laminated sheet is 40
When the amount is less than g / m ^2, it is difficult to impregnate the cleaning agent in an amount necessary for wiping a large area floor. If it exceeds 200 g / m ² , the operability may deteriorate due to the increase in weight, and the cost may increase. The basis weight is more preferably 50 to 150 g / m ² , particularly preferably 55 to 100 g / m ² . Further, the thickness is preferably 0.2 to 10 mm under a load of 3 g / m ^{2 in} a dry state, and 0.4 to 5 mm, particularly 0.6 to 2 mm from the viewpoint of followability of the uneven floor and cost.
Is more preferable.

The outer layer 3 constituting the laminated sheet constitutes a surface layer of the cleaning sheet 1 of the present embodiment, and is a portion which comes into contact with the floor when the cleaning sheet 1 is used. The outer layer 3 has a fiber length of 20
mm or more, especially 30-100 mm, especially 35-65
mm of non-woven fabric,
This is preferable in that the surface strength of the cleaning sheet 1 sufficiently develops. A nonwoven fabric composed of fibers having a fiber length of 20 mm or more does not require the fiber length of all the constituent fibers to be 20 mm or more, and is inevitably mixed into the raw material of the nonwoven fabric and / or in the production process. / Or generated fiber length 20m
It is permissible to include fibers of less than m. In the present embodiment, the outer layer 3 corresponds to the surface layer. However, when the sheet impregnated with the cleaning agent has a single layer structure, the surface layer in the sheet refers to the surface of the sheet. And a region in the vicinity thereof.

As shown in FIG. 1, the laminated sheet has been subjected to hot embossing in the form of a rhombic lattice, and a large number of convex portions 4, 4,... 4 having a linear concave portion 5. The concave portion 5 is more compact than the convex portion 4 by applying heat and pressure by hot embossing. The area of the projections 4 is 30 to 95%, preferably 40 to 85%, particularly 50 to 80% of the apparent area of the cleaning surface of the cleaning sheet 1, and the collection of hair and cotton dust during cleaning. It is preferable from the viewpoint of achieving both the properties and the operability of the mop. Here, the apparent area of the cleaning surface of the cleaning sheet 1 refers to the area when the cleaning surface of the cleaning sheet 1 is viewed in plan.

The area of the projection 4 is measured as follows. That is, a cleaning sheet (10 cm × 10 cm) impregnated with a predetermined amount of an aqueous cleaning agent is spread on one sheet, and a pen-paper for practice of calligraphy in which a portion wet with water is made darker and darker [Kuretake Seishodo Co., Ltd.] Manufactured by KN37-10]. An acrylic plate (25 g) of 10 cm × 10 cm was placed on the cleaning sheet, and a 2,000 g weight was placed thereon, and a load was applied for 60 seconds. Thereafter, the weight and the acrylic plate were quickly removed, and the area of the darkened portion of the half-paper was determined using an image analyzer [New Qube, manufactured by Nexus Co., Ltd.]. did. Further convex part 4
Is divided by 100 cm ² (apparent area of the cleaning surface of the cleaning sheet) to obtain the area ratio of the projection 4.

The pattern shape of the concave portion 5 formed by the embossing is not particularly limited to that shown in FIG. 1, but is preferably a continuous linear shape, a curved shape or a pattern having both of them. In particular, it is preferable that the continuous linear concave portions 5 intersect with each other to form the closed convex portions 4 by the concave portions 5 from the viewpoint of maintaining the surface strength of the cleaning sheet 1. When the concave portion 5 is linear or curved, the line width is preferably 0.5 to 3 mm. Further, the distance between the concave portions 5 is appropriately adjusted according to the characteristics required for the cleaning sheet 1 and the like. Further, an embossed pattern obtained by combining the continuous linear pattern and the discontinuous dot-shaped pattern is also preferably used.

The outer layer 3 of the laminated sheet is preferably made of a nonwoven fabric as described above. As a nonwoven fabric,
From the viewpoint of the texture of the sheet and the entanglement of hair and cotton dust, a spunlace nonwoven fabric that can exhibit a low fiber entangled state is preferable.

The fibers constituting the outer layer 3 preferably contain hydrophilic cellulose fibers and low-melting thermoplastic fibers from the viewpoint of maintaining cleanability, operability and sheet strength.

It is preferable that the hydrophilic cellulose fiber is contained in an amount of 30 to 98% by weight, especially 50 to 90% by weight, based on the weight of the outer layer 3 in order to efficiently remove stain stains and soil dust. This is due to the fact that the hydrophilic cellulose fibers are excellent in re-absorbing the soil liquid in which dirt and soil dust are dissolved and dispersed. Examples of the hydrophilic cellulose fibers include rayon and cotton fibers.

The low-melting thermoplastic fiber is contained in an amount of 2 to 70% by weight, especially 10 to 50% by weight, based on the weight of the outer layer 3, which improves the strength of the sheet after hot embossing. It is preferable because the property becomes good.

The thermoplastic fiber having a low melting point preferably has a melting point of 200 ° C. or lower, particularly preferably 170 ° C. or lower. Specifically, polyethylene-based fibers, polypropylene-based fibers, low-melting type polyethylene terephthalate-based fibers, polyvinyl alcohol fibers and core-sheath fibers having low-melting fibers of these fibers as sheath components, and high-melting fibers as core components, And side-by-side fibers of low-melting fibers and high-melting fibers.

The outer layer 3 may contain other synthetic fibers in addition to the hydrophilic cellulose fibers and the low-melting thermoplastic fibers from the viewpoint of improving the cleaning properties, the operability, and the feeling of the sheet. Other synthetic fibers include polyester fibers, polyacrylonitrile fibers, nylon fibers, acetate fibers, polyvinyl alcohol fibers, polyvinyl chloride fibers, and the like.

The fiber diameter of the fibers constituting the outer layer 3 is not particularly limited, but is preferably 3.3 dtex or less, particularly preferably 0.5 to 2.0 dtex from the viewpoint of entanglement of hair and cotton dust. More preferred. The fiber length of the fiber is not particularly limited, and either a long fiber filament or a short fiber staple fiber can be used.

The basis weight of the outer layer 3 is 8 to 70 g / m ² , especially 15 to 3 in relation to the basis weight described above for the laminated sheet.
It is preferably 0 g / m ² . Further, the thickness (thickness of each outer layer 3) is preferably 0.05 to 5 mm, and is preferably 0.1 to 5 mm from the viewpoints of collecting property of hair and cotton dust and cost.
It is more preferable that the thickness be 2 to 2 mm, particularly 0.2 to 1 mm.

For the inner layer 2 constituting the laminated sheet, various sheet materials such as paper, nonwoven fabric, woven fabric, and resin net can be used. These sheet materials have high strength, for example, a breaking strength of 200 cN from the viewpoint of maintaining the strength of the cleaning sheet.
/ 25 mm or more. When the basis weight of the laminated sheet is set to 100 g / m ² or less, the inner layer 2 is low in density and bulky from the viewpoint of holding the aqueous cleaning agent and expressing the strength, thickness feeling and cushioning property of the laminated sheet. Is preferred. As a constituent material of the inner layer 2 having such characteristics, for example, a non-woven fabric such as a thermal bond (air through) non-woven fabric, a spun lace non-woven fabric, and an air-laid non-woven fabric are preferable. The higher the breaking strength is, the more preferable, but in reality, the upper limit is about 100 N / 25 mm.

When the inner layer 2 is composed of fibers, hydrophilic fibers such as rayon, cotton, pulp, and polyvinyl alcohol fibers can be used as the fibers. It is also preferable to mainly use hydrophobic fibers from the viewpoint of increasing the thickness of the inner layer 2 and improving the cushioning property. For example, polyolefin fibers such as polyethylene and polypropylene, polyamide fibers such as polyester fiber and nylon, polyacrylonitrile fibers, and composite fibers such as core-sheath fibers and side-by-side fibers of these fibers. It is preferable that these fibers are subjected to three-dimensional crimping in that the thickness of the inner layer 2 is increased and the cushioning property is improved. In addition, when forming an uneven portion on the surface of the laminated sheet by heat treatment,
Heat shrinkable fibers and heat crimpable fibers are used.

When the inner layer 2 is made of fiber, the fiber diameter of the fiber is not particularly limited, but is preferably 1 to 7 dtex from the viewpoint of increasing the thickness and cushioning property. The fiber length of the fiber is not particularly limited, and either a long fiber filament or a short fiber staple fiber can be used.

The basis weight of the inner layer 2 is 20 to 150 g / m ² , particularly 25
It is preferably 80 g / m ² . Further, the thickness is preferably 0.2 to 4.8 mm, and 0.4 to 3 mm, particularly 0.6 to 3 mm, from the viewpoint of enhancing the thickness and cushioning property and satisfying the cost without disposable resistance. 2
mm is more preferable.

The laminated sheet composed of the above-mentioned inner layer 2 and outer layer 3 is preferably produced by, for example, the following method. First, a spun lace nonwoven fabric having a low entanglement and a high degree of fiber freedom as the outer layer 3 is manufactured. Separately, a low-density and bulky thermal bond nonwoven fabric that becomes the inner layer 2 is manufactured. The outer layer 3 is arranged on both surfaces of the inner layer 2 and subjected to heat embossing to integrate the three members to form a laminated sheet.

[0030] Another preferred production method is to first use the inner layer 2
After the fiber web produced by the card method or the like is superimposed on both sides of the thermal bond nonwoven fabric to be wrapped, an entanglement treatment (water needling treatment) using a high-pressure water flow is performed to entangle the fibers of the fiber web. Outer layer 3
And a low-entangled composite spunlace nonwoven fabric in which the fiber web is integrated in an entangled state with the inner layer 2 made of a thermally bonded nonwoven fabric. The nonwoven fabric obtained in this manner has a nonwoven fabric aggregate (spunlace nonwoven fabric) formed by fiber entanglement of a fiber web on both sides of a thermal bond nonwoven fabric as a sheet material together with the entanglement of its constituent fibers. Also integrated with the sheet material in an entangled state. Next, this is subjected to hot embossing to form a laminated sheet.

Regardless of the production method used, the degree of freedom of each fiber of the surface layer that comes into contact with the floor at the time of use is increased from the viewpoint of effectively entanglement of hair and cotton lint, that is, the surface It is preferred that the layer be in a low fiber entangled state.

As an index of the fiber entangled state of the surface layer in the cleaning sheet 1 of the present embodiment, a static friction resistance value can be adopted. The static friction resistance is measured by the method shown in FIG. That is, sand paper (waterproof paper manufactured by 3M)
Techno sander particle size 1200) 20 stuck,
A weight (with a total weight of 400 g including sandpaper) 21 having a bottom surface of 10 cm × 10 cm is placed on a horizontal table 23 and a cleaning sheet 22 impregnated with an aqueous cleaning agent is firmly fixed.
(200 mm × 280 mm) The surface is placed so that the sand surface of the sandpaper faces the cleaning sheet. A thread 24 is attached to the side of the weight, and the other end of the thread 24 is connected to the pulley 2
5 through a tensile tester (Orientic, RTM
-25). The tensile tester is operated to move the weight 21 horizontally at a speed of 500 mm / min by 30 mm, and the initial maximum static friction resistance value at that time is measured, and this is used as an index of the degree of fiber entanglement of the surface layer.
The measurement is performed in the sheet flow direction (MD) and the width direction (CD) in the cleaning sheet manufacturing process. The sandpaper is replaced with a new one after each measurement.

In the surface layer of the cleaning sheet impregnated with the aqueous cleaning agent, the fibers are less entangled, that is, the higher the degree of freedom of each fiber, the more the fibers are caught on the sandpaper. The static friction resistance tends to show a high value.

The static frictional resistance of the surface layer of the cleaning sheet 1 as an index of the fiber entangled state is 900 to 2500 cN.
It is preferred that If it is less than 900 cN, it becomes difficult to obtain good entanglement properties of hair and cotton dust.
If it exceeds 2500 cN, the surface strength of the sheet is weakened, and the fibers may be caught on the burrs of the floorboard, and the operability of the mop may be heavy. A more preferable static friction resistance value is 1100 to 2200 cN, particularly 1200 to 20 cN.
00cN. It is most preferable that the static friction resistance value in any of the MD and CD directions of the cleaning sheet 1 be within the above range, but it is sufficient if the static friction resistance value in at least one of the directions is within the above range.

The laminated sheet has a breaking strength of 200 cN.
/ 25mm or more, especially 300 to 8000cN / 25mm
Is preferable from the viewpoint of suppressing the dropping of the fiber from the surface layer and at the same time achieving the entanglement property of hair and cotton dust. The breaking strength is determined by the flow direction (M
At least one of D) and the width direction (CD) satisfies the above value.

The cleaning sheet 1 of the present embodiment is formed by impregnating the laminated sheet with an aqueous cleaning agent. Thereby, the characteristics as a wet sheet are exhibited. As the aqueous detergent, one having a viscosity at 25 ° C. of 20 to 30,000 mPa · s is used. By using an aqueous detergent having a viscosity in this range, (1) the amount of the aqueous detergent released to the floor in the initial stage of cleaning is reduced, and the release amount of the aqueous detergent from the beginning to the end of cleaning is made uniform. (2) The cleaning continuity of a large area to be cleaned is improved, and (3) the release amount of the aqueous cleaning agent is low even at the initial stage of cleaning, so that the frictional resistance of the cleaning sheet to the surface to be cleaned is reduced. 4) Since the release amount of the aqueous cleaning agent is low even in the initial stage of cleaning, the degree of freedom of fibers on the surface of the cleaning sheet is large, and there is an advantage that hair and cotton dust are entangled and held by the fibers. Aqueous detergent viscosity is 20mP
If it is less than a · s, it is difficult to reduce the amount of the aqueous detergent released to the floor in the initial stage of cleaning. If it exceeds 30,000 Pa · s, it becomes difficult to impregnate the laminated sheet with the aqueous cleaning agent. The viscosity is 100 to 100 from the viewpoint of reducing the release amount of the aqueous detergent in the initial stage of cleaning and further improving the handleability in the step of impregnating the laminated sheet with the aqueous detergent.
It is preferably 0 mPa · s, particularly preferably 300 to 800 mPa · s.

The viscosity is measured using a Brookfield viscometer. The used rotor and the number of rotations are appropriately changed according to the viscosity of the aqueous detergent.

The aqueous detergent is substantially free of water-insoluble solid particles. When the water-insoluble solid particles are mixed with the aqueous cleaning agent, the solid particles remain on the surface to be cleaned and need to be wiped twice. However, a trace amount, for example, up to about 0.1% by weight as an impurity may be included.

The aqueous detergent uses water as a medium, a surfactant,
It preferably contains an alkali agent, a thickener and a water-soluble solvent. It is preferred that all the components contained in the aqueous detergent are substantially water-soluble. The content of the non-volatile residual components contained in the aqueous cleaning agent is preferably 10% by weight or less from the viewpoint of finish after cleaning, particularly preferably 5% by weight or less, particularly preferably 1% by weight or less.

As the surfactant, any of anionic surfactants, nonionic surfactants, cationic surfactants and amphoteric surfactants are used. Particularly, from the viewpoint of compatibility between detergency and finish, Polyoxyalkylene (alkylene oxide addition mole number 1 to 20) alkyl (C8 to
22 straight-chain or branched-chain) ethers, alkyls (8 carbon atoms)
To 22 straight-chain or branched-chain) glycosides (average sugar condensation degree 1)
5), non-ionic activators such as sorbitan fatty acid (linear or branched chain having 8 to 22 carbon atoms) and alkyl (linear or branched chain having 6 to 22 carbon atoms) glyceryl ether, and alkyl carboxy betaines and alkyls Amphoteric surfactants having 8 to 24 alkyl carbon atoms, such as sulfobetaine, alkylhydroxysulfobetaine, alkylamidocarboxybetaine, alkylamidosulfobetaine, and alkylamidohydroxysulfobetaine are preferably used. The surfactant is contained in the aqueous detergent in an amount of 0.01 to 1.
The content of 0% by weight, particularly 0.05 to 0.5% by weight, is preferable in terms of cleanability and finish of the surface to be cleaned.

Examples of the alkaline agent include hydroxides such as sodium hydroxide, carbonates such as sodium carbonate, alkaline sulfates such as sodium hydrogen sulfate, phosphates such as monobasic sodium phosphate, sodium acetate, and succinic acid. Organic alkali metal salts such as sodium, alkanolamines such as ammonia, mono, di or triethanolamine, β-aminoalkanols such as 2-amino-2-methyl-1-propanol, and morpholine.
Alkanolamines such as mono-, di- or triethanolamine, β-aminoalkanols such as 2-amino-2-methyl-1-propanol, and morpholine are preferred in terms of buffering property. The alkaline agent is contained in the aqueous detergent at 0.0
The content of 1 to 1% by weight, particularly 0.05 to 0.5% by weight is preferable in view of detergency and feel.

Examples of the thickener include natural polysaccharides, semi-synthetic polymers such as cellulosic polymers and starch polymers, other synthetic polymers such as vinyl polymers and polyethylene oxide, and water-soluble polymers such as clay minerals. Molecules. In particular, a polyacrylic acid-based thickener, acrylic acid / alkyl methacrylate copolymer-based thickener, or a mixture thereof having a low stickiness and a low stickiness is preferable. It is preferable that these acrylic acid-based thickeners exhibit viscosity in a state of a sodium salt. The thickener is preferably contained in the aqueous detergent in an amount of 0.01 to 2% by weight, particularly preferably 0.02 to 1% by weight, from the viewpoint of the finish of the surface to be cleaned.

The water-soluble solvent is preferably at least one selected from monohydric alcohols, polyhydric alcohols and derivatives thereof. In particular, the vapor pressure is 267 from the viewpoint of the finish.
Those having Pa (2 mmHg) or more are preferable. For example, ethanol, isopropyl alcohol, propanol, ethylene glycol monomethyl ether, propylene glycol monomethyl ether and the like are preferable. The water-soluble solvent is preferably contained in the aqueous detergent in an amount of 1 to 50% by weight, particularly 1 to 20% by weight, from the viewpoint of reducing odor and skin irritation.

The aqueous detergent may contain a disinfectant in addition to the above-mentioned components. As a result, it is possible to impart a disinfecting effect to the aqueous detergent in addition to the cleaning effect. Examples of the disinfectant include hydrogen peroxide, hypochlorous acid, sodium hypochlorite, quaternary ammonium salt, sodium benzoate, sodium paraoxybenzoate, natural disinfectants such as polylysine, and the like. Natural disinfectants such as quaternary ammonium salts and polylysine are preferably used from the viewpoint of blending stability and disinfection performance. The disinfectant is preferably contained in the aqueous detergent in an amount of 0.005 to 2% by weight, particularly 0.01 to 1% by weight, from the viewpoint of the balance between the disinfecting effect and the reduction of skin irritation.

Further, if necessary, the aqueous detergent may contain a fragrance,
An antifungal agent, a coloring matter (dye or pigment), a chelating agent, a waxing agent and the like can be contained.

Water, which is a medium of the aqueous detergent, is preferably contained in the aqueous detergent in an amount of 50 to 99.9% by weight, particularly 80 to 99% by weight, from the viewpoint of the finish of the surface to be cleaned.

As shown in FIG. 2, the cleaning sheet 1 of the present embodiment includes a cleaning unit 11 of a cleaning tool 10 including a cleaning unit 11 and a rod-shaped handle 12 connected to the cleaning unit 11.
Used for floor cleaning. Specifically, the cleaning tool 10 is a flat cleaning unit 1 on which the cleaning sheet 1 can be mounted.
The cleaning sheet 1 is made up of a plurality of flexible pieces forming radial slits provided in the cleaning unit 11 and a rod-shaped handle 12 connected to the cleaning unit 11 via a universal joint 13. It is adapted to be fixed by the part 14.

The present invention is not limited to the above embodiment. For example, the cleaning sheet 1 in the above embodiment is a three-layer laminated sheet impregnated with an aqueous cleaning agent. Instead of the laminated sheet, a single-layer, two-layer, or four- or more-layer structure is used. A sheet may be used. For example, in the above embodiment, the outer layer 3 may be laminated only on one side of the inner layer 2.

Further, the cleaning sheet 1 in the above-described embodiment is used.
The shape of the convex portion on the surface of the sheet can be various shapes depending on the ease of manufacturing the sheet, the operability of the cleaning sheet 1, and the like.

[0050]

Next, the present invention will be described more specifically based on examples. Note that the present invention is not limited to the following embodiments. Prior to Examples and Comparative Examples, a method of an evaluation test will be described.

1) Amount of Detergent Released A cleaning sheet was attached to a quick wiper (manufactured by Kao Corporation) and the amount of cleaning liquid released per tatami mat when the flooring was continuously wiped for 6 tatami mats was measured. Each time one tatami mat was wiped, the cleaning sheet was detached from the cleaning unit head, and its weight was measured to measure the amount of the cleaning liquid. In the cleaning method, one stroke of wiping at a distance of about 90 cm was defined as one stroke, and two lines were wiped in the longitudinal direction (180 cm) of one tatami room and four lines in the short direction (90 cm) to complete the cleaning of one tatami room.

2) Static friction resistance as an index of the degree of fiber freedom of the surface layer of the cleaning sheet was measured according to the method described above. In addition, the load of 400 g is
When a cleaning sheet is attached to a quickle wiper (manufactured by Kao Corporation) and the floor is cleaned, this is substantially equivalent to the average load applied to the sheet.

3) Area ratio of protrusions Measured according to the method described above.

4) Hair collection rate A cleaning sheet was attached to a quickle wiper (manufactured by Kao Corporation). Five hairs of about 10 cm are sprinkled on a 30 cm × 60 cm flooring (Woody Tile MT613T, manufactured by Matsushita Electric Works), a cleaning sheet is placed on the hair, and two reciprocations are performed at a fixed stroke (60 cm) to catch the hair on the cleaning sheet. The number of collected hairs was measured. This operation was performed six times in succession, and the number of hairs collected out of the 30 hairs was measured. The number of collected hairs was divided by 30, multiplied by 100, and the value was taken as the collection rate (%) of the hairs.

5) Collectability of dust (dust) A cleaning sheet was attached to a quickle wiper (manufactured by Kao Corporation). 0.1 g of JIS test dust (Kanto loam layer, fine grains) was sprayed on a 100 cm × 100 cm flooring (Woody tile MT613T, manufactured by Matsushita Electric Works) (uniformly spread over the entire surface using a brush), and the flooring was 1
Four rows were cleaned back and forth. After this operation is repeated six times, the soiled cleaning sheet is dried to measure the weight (sheet + detergent non-volatile component + dust), and the weight of the sheet measured before impregnation and the weight of theoretically remaining non-detergent non-volatile component are measured. The dust collection amount was calculated by subtraction. The weight of the collected dust,
The weight was divided by the total weight of the sprayed dust (0.6 g = 0.1 g × 6 times), multiplied by 100, and the value was taken as the dust collection rate (%).

6) Removability of soy sauce dry stain on 6th tatami One drop (0.02 g) of commercial soy sauce was put on the flooring (area: 1 tatami) and dried with a dryer. A cleaning sheet is attached to a quick wiper (manufactured by Kao Corporation), and another clean flooring is continuously cleaned for 5 tatami mats.
The tatami mats were cleaned and evaluated according to the following criteria. The five-tatami mat floor to be cleaned first is cleaned in the same manner as when measuring the amount of detergent release, and the flooring with soy sauce stains is wiped only on the dirt, and the relationship between the number of times of cleaning and dirt removal. Was evaluated. ：: Dirt was completely removed by cleaning not more than 10 round trips. △ to △: Dirt was completely removed by cleaning 15 times. Δ: Dirt was completely removed by 20 round trip cleanings. Δ to ×: Dirt was completely removed by 30 round trip cleanings. X: Dirt could not be completely removed even after more than 30 round trips.

7) Finishability A cleaning sheet was attached to a quickle wiper (manufactured by Kao Corporation), and a clean flooring of 100 × 100 cm was cleaned. The finish of the flooring after drying was visually evaluated in the following three stages by holding it over a fluorescent lamp. ：: There is no residual trace (wiping line, etc.) of the detergent component. Δ: There are some residual traces (wipe streaks, etc.) of the detergent component. ×: There are residual traces (wiping lines, etc.) of the detergent component.

8) Operability of the wiper when cleaning the 1st tatami room and wiper operation load at the start of wiping A cleaning sheet is attached to a quickle wiper (manufactured by Kao Corporation), and a flooring board (woody tile E manufactured by Matsushita Electric Works) is attached. The operability of the wiper at the start of wiping type KER501) with one hand was visually evaluated in the following four stages. ：: Almost no resistance is felt. △ to 抵抗: Slight resistance is felt, but can be wiped with one hand. Δ: Feels a sense of resistance, but can be wiped with one hand. ×: There is a large sense of resistance, and the handle of the wiper bends when wiped with one hand. Also, as shown in FIG. 4, a load cell 33 for measuring a compressive load was mounted between the cleaning head portion 31 and the handle 32 of the quickle wiper 30, and the flooring 34 was started to be wiped using the quickle wiper 30. The compression load at the time was measured.

[Examples 1 to 5] A low-melting fiber (2.8 dtex x 51 mm, having a three-dimensional crimp shape) having a core-sheath structure in which the core is made of polypropylene and the sheath is made of polyethylene.
An air-through nonwoven fabric having a basis weight of 27 g / m ² was prepared using the sheath component (melting point of 130 ° C.). 140 ° C between fibers
For thermal bonding. The breaking strength of this air-through nonwoven fabric is
The flow direction (MD) was 1660 cN / 25 mm, and the width direction (CD) was 220 cN / 25 mm.

On the other hand, rayon fiber (1.7 dtex × 4)
0mm) and acrylic fiber (0.9dtex x 51m)
m) and a core-sheath fiber (1.0 dtex × 38 mm) whose core is made of polypropylene and whose sheath is made of polyethylene,
The fibers were mixed at a weight ratio of 50/25/25, and a fiber web having a basis weight of 19 g / m ² produced by a conventional card machine was laminated on and under the air-through nonwoven fabric. Next, a water needling treatment was performed under low energy conditions, and the air-through nonwoven fabric and the fiber web were entangled to prepare a composite spunlace nonwoven fabric having a basis weight of 65 g / m ² and a surface layer having a high degree of fiber freedom. Using an ultrasonic embossing machine, the entire surface of the prepared nonwoven fabric was embossed with a diamond-shaped uneven pattern.

Water / ethanol / 2-amino-2-methyl-1-propanol / dodecylglucoside (condensation degree 1.
4) / Aqueous detergent (viscosity: 25 mPa · s / 2) consisting of a thickener (Carbopol ETD2020, manufactured by Nikko Chemical Co., Ltd.) = 93.89 / 6 / 0.1 / 0.01 (weight ratio)
5 ° C.) was impregnated into the obtained nonwoven fabric to prepare a floor cleaning sheet. The impregnation rate of the aqueous detergent was 250% based on the weight of the nonwoven fabric. In addition, Carbopol ETD2020
Is an acrylic acid / alkyl methacrylate (10 to 3 carbon atoms)
0) It is a copolymer. The breaking strength of the cleaning sheet impregnated with the aqueous cleaning agent was 3120 c in the flow direction (MD).
N / 25mm, width direction (CD) is 410cN / 25mm
Met.

With the same detergent composition as described above, the viscosity at 25 ° C.
a · s (Example 2), 500 mPa · s (Example 3),
5000 mPa · s (Example 4), 25,000 mPa · s
s (Example 5) was further prepared and impregnated with a nonwoven fabric similar to the above nonwoven fabric at an impregnation rate of 250% to prepare a floor cleaning sheet.

[Comparative Example 1] A detergent composition similar to that described above but without a thickener (water / ethanol / 2-amino-2-
Example 1 except for methyl-1-propanol / dodecylglucoside (condensation degree 1.4) = 93.9 / 6 / 0.1).
In the same manner as in the above, a floor cleaning sheet was prepared.

[Comparative Example 2] In the above-described method for producing a composite spunlace nonwoven fabric, a water needling treatment was performed under a high energy condition to entangle the air-through nonwoven fabric and the fiber web, thereby forming a composite having a relatively low degree of fiber freedom. A spunlace nonwoven fabric was prepared. The obtained nonwoven fabric was subjected to the same embossing as in Example 1, and then impregnated with the same detergent as that used in Comparative Example 1 to prepare a floor cleaning sheet.

Comparative Example 3 The composite spunlace nonwoven fabric having a relatively low degree of fiber freedom prepared in Comparative Example 2 was embossed in the same manner as in Example 1, and then washed containing solid particles having the following composition. 250% of non-woven fabric weight
And a floor cleaning sheet was prepared. Detergent composition: spherical silicone resin (solid particles having an average particle diameter of 3 μm) / dodecylglucoside (condensation degree 1.4) / xanthan gum / ethanol / water = 3 / 0.5 / 0.13
/20/76.37 (weight ratio) Viscosity at 25 ° C: 46 mPa · s

The cleaning sheets for floors obtained in the examples and comparative examples were evaluated in the above-mentioned items 1) to 8). The results are shown in Table 1 below.

[0067]

[Table 1]

As is evident from the results shown in Table 1, the cleaning sheets for floors (products of the present invention) of Examples 1 to 5 have a long lasting ability to clean a large area without too much detergent at the beginning of wiping. I understand. In addition, it can be seen that the degree of freedom of the fiber on the surface is high, and the property of collecting hair and dust is excellent. In addition, it was found that the floor was excellent in removing stain stains and the finish after cleaning was good. Furthermore, it turns out that the operability of the wiper is also good.

[0069]

According to the present invention, an inexpensive wet type which is used by being attached to a mop-shaped cleaning tool, in particular, provides stable sustained release, has good operability, and can clean a wide area. Floor cleaning sheet is provided. According to the present invention,
Provided is a floor cleaning sheet that combines the characteristics of a dry and wet sheet, does not require dry wiping, and can remove stains along with dust, hair, and solid debris on the floor. Further, according to the present invention, there is provided a floor cleaning sheet capable of protecting and polishing a floor and removing bacteria.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing one embodiment of a floor cleaning sheet of the present invention.

FIG. 2 is a perspective view showing a state in which the floor cleaning sheet of the present invention is attached to a cleaning tool.

FIG. 3 is a schematic view showing a method for measuring a static friction resistance value.

FIG. 4 is a schematic diagram showing a method of measuring a wiper operation load at the start of wiping.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Floor cleaning sheet 2 Inner layer 3 Outer layer 4 Convex part 10 Cleaning tool 11 Cleaning part 12 Handle

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroyuki Akai 2606 Akabane, Kakaicho, Haga-gun, Tochigi Prefecture F-term in Kao Corporation Research Institute (reference) 3B074 AA02 AA08 AB01 AC00 CC03

Claims (7)

[Claims] 1. A floor cleaning sheet impregnated with an aqueous cleaning agent, which is used by being attached to a cleaning unit of a cleaning tool having a cleaning unit and a rod-shaped handle connected to the cleaning unit, The aqueous detergent is substantially free of water-insoluble solid particles, and is 100 to 1000 per sheet weight (dry basis).
% By weight and has a viscosity at 25 ° C. of 20 to 300.
A floor cleaning sheet having a pressure of 00 mPa · s. 2. The floor cleaning according to claim 1, wherein the components contained in the aqueous cleaning agent are substantially water-soluble, and the non-volatile residual components contained in the aqueous cleaning agent are 10% by weight or less. Sheet. 3. The floor cleaning sheet impregnated with the aqueous cleaning agent has a basis weight of 40 to 200 g / m ² and a surface layer that comes into contact with the floor during use is made of fibers having a fiber length of 20 mm or more. 3. The floor cleaning sheet according to claim 1, wherein the floor cleaning sheet is made of a nonwoven fabric having a plurality of irregularities on the surface. 4. The surface layer contains 30 to 98% by weight of a hydrophilic cellulose fiber and 2 to 70% by weight of a low-melting thermoplastic fiber based on the weight (dry basis) of the surface layer, and has a large number of convex portions. And a plurality of concave portions which are compacted by application of heat and pressure, wherein the area of the convex portions is 30 to 95% with respect to an apparent area of a cleaning surface of the cleaning sheet. 3. The floor cleaning sheet according to any one of 3. 5. The floor cleaning sheet according to claim 1, wherein a nonwoven fabric aggregate formed by entanglement of a fiber web with one or both surfaces of a sheet material having high strength is formed together with entanglement between constituent fibers thereof. The aqueous cleaning agent is impregnated into a laminated sheet integrated with the sheet material in an entangled state, and the breaking strength of the laminated sheet is 200 cN / 25 mm or more, and the nonwoven fabric fiber aggregate floor cleaning sheet according to any one of claims 1 to 4 weight basis are each 8~70g / m ^2. 6. The sandpaper (particle size 12) of the surface layer in the cleaning sheet impregnated with the aqueous cleaning agent.
No. 00) of 900 to 2500 cN
The floor cleaning sheet according to any one of claims 1 to 5, wherein 7. The aqueous detergent contains a polyacrylic acid thickener, an acrylic acid / alkyl methacrylate copolymer thickener, or a mixture thereof.
A floor cleaning sheet according to any one of claims 1 to 6.