JP3369839B2 - Cleaning sheet - Google Patents

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-like cleaning tool, and more specifically, it removes stains and stains on the floor and protects and polishes the floor. The present invention relates to a cleaning sheet for wet cleaning which is used for household and business purposes for cleaning and maintenance and does not slip off or come off even when absorbing a large amount of liquid.

[0002]

2. Description of the Related Art Conventionally, the problems to be solved by the invention
For cleaning stains on floors, etc., even on a large floor,
It was performed by bending down with a wet cloth squeezed. Also, the floor is protected and polished by bending a dry rag, towel, etc. with a wax agent and bending over like cleaning the floor stains.

Generally, in the field of dry cleaning for removing dirt and cotton dust on the floor, a tufted mop or a replaceable sheet type mop treated with an oil agent for fibers is used to easily clean a wide floor. It has been proposed and is actually used for both home and business use. On the other hand, tufted mops have also been proposed in the field of wet cleaning such as cleaning of floor stains and the like as described above, and floor cleaning such as floor protection and polishing, and cleaning. The tufted mop is used for cleaning the floor after soaking the tufted part in water and squeezing it with a roll.

However, although the tufted mop is often used in commercial places such as buildings and factories, it is troublesome to prepare buckets, squeezing rolls, etc. Therefore, excess water is used, and there is a problem that this excess water damages the flooring material, so it is rarely used.
In addition, a dedicated mop having a flat-shaped cleaning section, which is used by attaching a rag, a towel, etc., has been proposed for general household use. However, when performing wet cleaning with a dust cloth or towel, the frictional resistance increases and the operability when wiping is poor, and when the wax agent is spread on the floor, it easily foams and the finish is poor. There was a problem that if the cloth was left on after it was applied, it could not be reused.

Therefore, the object of the present invention is to easily remove stains and stains on floors, to clean floors, to clean floors and polish them, and to perform wet cleaning such as maintenance in general households, and to absorb liquid. Another object of the present invention is to provide a disposable cleaning sheet that is hard to come off and is used by being attached to a mop-shaped cleaning tool.

[0006]

Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventors have provided a liquid-permeable surface sheet, a liquid absorber, and a liquid-impermeable mounting sheet. ,
It has been found that a cleaning sheet in which the mounting sheet has a specific coefficient of friction can achieve the above object.

The present invention has been made based on the above findings, and comprises a cleaning unit and a rod-shaped handle connected to the cleaning unit, and both side portions of the sheet are fitted and held in the cleaning unit. In a cleaning tool provided with a sheet holding section for cleaning, a cleaning sheet mounted so as to cover a lower surface of the cleaning section, the surface sheet having liquid permeability, and the liquid impermeable sheet contacting with the cleaning unit. A mounting sheet and a liquid absorber disposed between the top sheet and the mounting sheet, and the holding force x (g) of the sheet holding portion is 10 g or more. The static friction coefficient y (ta
nθ) has a relationship represented by the following relational expression. y> -0.0005x + 0.5 ...

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the cleaning sheet of the present invention will be described in more detail with reference to the accompanying drawings. FIG. 1 is a perspective view showing a state where the cleaning sheet of the present invention is attached to a cleaning tool, and FIG. 2 is a perspective view of the cleaning sheet of the present invention shown in FIG. FIG. 3 is a perspective view of the cleaning tool shown in FIG. Figure 4
Is a perspective view showing an outline of a method of measuring a static friction coefficient,
5 (a) and 5 (b) are schematic diagrams showing the outline of the method for measuring the holding force. 6 is a cross-sectional view showing one form of the cleaning sheet of the present invention (II 'of the cleaning sheet shown in FIG. 2).
FIG. 7 is a cross-sectional view showing a part of the cleaning sheet according to another embodiment of the present invention. FIG. 7 is a cross-sectional view (corresponding to FIG. 6) showing the cleaning sheet of the present invention, and FIG. It is a top view which shows one form of the mounting sheet used for the cleaning sheet of this invention.

As shown in FIG. 1, the cleaning sheet 1 of the present invention comprises a cleaning portion 11 and a rod-shaped handle 12 connected to the cleaning portion 11, and the cleaning portion 11 has both side portions of the sheet. In the cleaning tool provided with the sheet holding portion 14 which is fitted and held, the cleaning tool is attached so as to cover the lower surface of the cleaning portion. More specifically, the cleaning sheet 1 has a flat plate-shaped cleaning portion 1
1 and a bar-shaped handle 12 connected to the upper surface of the cleaning unit 11. The cleaning unit 11 has a rectangular shape in plan view, and holds both sides of the sheet by fitting both sides of the upper surface in the longitudinal direction. In the cleaning tool provided with the sheet holding unit 14,
It is installed so as to cover the lower surface of the cleaning unit, and sprays a cleaning agent or a protective / polishing agent directly onto the floor, or sprays a cleaning agent or a protective / polishing agent onto a cleaning sheet, and then cleans the surface to be cleaned. It is used in the form of wiping.

The cleaning tool 10 will be further described below.
As shown in FIG. 3, the handle 12 is rotatably connected by a connecting portion 13 at a substantially central portion of the upper surface 16 of the cleaning portion 11. Further, the cleaning unit 11 is the cleaning surface unit 1.
5 and an upper surface portion 16, and a sheet holding portion 14 for holding the sheet by fitting both sides of the cleaning sheet 1 when the cleaning sheet 1 is mounted is provided on both left and right sides of the upper surface portion 16. ing. Then, the cleaning sheet 1 is mounted on the cleaning tool 10 such that the cleaning surface portion 15 of the cleaning tool and the mounting sheet 4 are brought into contact with each other. Since the cleaning tool 10 is configured in this manner, it is possible to efficiently clean the cleaning surface portions 15 of various shapes while maintaining a stable seat attachment state.

Further, as shown in FIG. 3, the cleaning surface 1 is
5 is attached to cover the lower peripheral edge portion of the upper surface portion 16. As a material for forming the cleaning surface portion 15, an elastic material such as urethane foam, polystyrene foam, rubber sponge, silicon sponge, or silicon rubber is used. Further, as the material for forming the upper surface portion 16, a usual molding material such as plastic is used.

A total of four sheet holding portions 14 are provided at each of the four corners of the upper surface portion 16.
More specifically, the sheet holding portion 14 has an elliptical shape, and inside the elliptical sheet holding portion 14, a Y-shaped cut 14a and a zigzag shape connected to the left and right of the Y-shaped cut. Notches 14b are formed. The length L of the sheet holding portion is preferably 10 to 40 mm, and the width w is preferably 10 to 40 mm,
Further, the distance L'from the edge of the upper surface portion 16 is 1 to 30 mm.
Is preferred. Unlike the material for forming the upper surface portion 16, the material for forming the sheet holding portion 14 is an elastic material such as low density polyethylene. Incidentally, the size, shape, notch shape, etc. of the sheet holding portion may be any as long as they satisfy a holding force x and a relational expression described later.
It is not limited to the example described above.

Thus, the cleaning sheet 1 of the present invention shown in FIG.
Is composed of a liquid-permeable top sheet 2, a mounting sheet 4 abutting on the cleaning section, and a liquid absorber 3 interposed between the top sheet 2 and the mounting sheet 4, Holding power x (g) is 10 g or more, preferably 30 to 10
00 g, and the holding force x and the static friction coefficient y (tan θ) when mounted on the cleaning portion of the mounting sheet have a relationship represented by the following relational expression, preferably a relation represented by the following relational expression '. . y> -0.0005x + 0.5 ... Y '>-0.001x + 1.0 ...' If the holding force x (g) is less than 10 g, the cleaning is performed regardless of the value of the static friction coefficient y. The cleaning sheet attached to the part comes off from the cleaning part during cleaning. Also,
If the holding force x (g) exceeds 1000 g, it may be difficult to remove the cleaning sheet when attaching or detaching it, so it is preferable to set it within the above range. In addition, the coefficient of static friction y (tan
θ) is not particularly limited as long as it satisfies the above relational expression.

Here, the static friction coefficient y and the holding force x are obtained by measuring according to the following measuring method. <Method of measuring static friction coefficient y> As shown in FIG.
Cleaning surface portion 15 ′ having a size of m × 255 mm and 5c
A mounting sheet 4 ′ cut into a size of m × 5 cm is prepared. Then, first, the cleaning surface portion 15 'installed horizontally
The mounting sheet 4'is placed substantially in the center of the one end 15a on the surface with which the sheet is abutted, and a load of 3.9 g / cm ² is uniformly applied to the lower edge of the mounted mounting sheet 4 '. Call. Then, the one end 15a is lifted upward,
The angle θ between the cleaning surface portion 15 ′ and the installation surface when the mounting sheet 4 ′ starts to slide is measured, and tan θ is obtained from this angle θ.

<Measurement Method of Holding Force> As shown in FIG. 5A, a mounting sheet is cut into a width of 25 mm and a length of 70 mm to obtain a test piece 4 ″. Then, the test piece 4 '' is folded in two at the center in the longitudinal direction, and at the bent portion 4b, a distance from the bent portion 4b to 10 mm [t shown in FIG. As shown in FIG.
As shown in FIG.
Hold both ends of the test piece 4 '' in the Tensilon tester,
Further, both ends held at a speed of 300 mm / min are pulled in opposite directions, and the load (only one side) when the test piece 4 ″ comes off is measured, and this is taken as the holding force. That is, the holding force is a holding force in one sheet holding portion.

A mounting sheet satisfying the above holding force x and the above relational expression can be obtained by subjecting the surface (the surface formed by the film) of the sheet formed of the material described later to a mirror surface treatment. Therefore, the mounting sheet is
It is preferably glossy. The above-mentioned mirror surface treatment can be carried out by employing a commonly known film mirror surface treatment method without particular limitation. Further, the mirror-finished portion of the mounting sheet is preferably larger than the area of the absorber, and further, the mirror-finished portion is preferably in contact with the cleaning portion over the entire cleaning portion. . In particular,
The area A shown in FIG. 2 (the area where the topsheet 2 is provided) may be subjected to the mirror surface treatment, and the area B shown in FIG. 2 (the entire surface of the mounting sheet 4) may be subjected to the mirror surface treatment. .

In the cleaning sheet 1, as shown in FIGS. 1 and 2, the mounting sheet 4 is formed in a wide rectangular shape, and the liquid absorber 3 is arranged in the width direction of the mounting sheet 4. The surface sheet 2 is placed in the substantially central portion,
It is arranged on the mounting sheet so as to cover the liquid absorber 3, and the side edge portion 2a thereof is heat-sealed and fixed to be formed.

Next, the surface sheet 2, the liquid absorber 3 and the mounting sheet 4 will be described in detail.

The topsheet 2 has a large number of protrusions, and the area of the protrusions contacting the surface to be cleaned during cleaning is preferably 5 to 6 with respect to the total area of the topsheet 2.
It is preferably 0%, more preferably 10 to 30%. If the area is less than 5%, streaks are formed and the finishability is deteriorated, and if it exceeds 60%, bubbles are apt to be formed, and the weight when wiping the floor becomes heavy.

Here, the above-mentioned "area of contacting convex portion" is the ratio of the area of the convex portion contacting the surface to be cleaned during cleaning to the area of the entire sheet, and is determined by the following measuring method. .

Measuring method; 1) After mounting the surface sheet on the cleaning unit,
Spray glue (Sumitomo 3M Co., Ltd. product
Name "55") uniformly about 0.0006 g / cm ²With sp
Or water about 0.016 on the surface of the sheet 2.
g / cm²To spray. 2) Flat plate 20 with 7 types of test dust (Kanto Law
, Fine grain, IWAMO TOMINERA CO. )
Disperse evenly. 3) Mount the sheet 2 from 1) on the flat plate 20.
Place the cleaning unit 11 and put the 500g weight 21 into
Then, a load is applied for 5 minutes to obtain a sample for measurement. 4) Image analysis of the obtained sample and
Area of the part that was contacted with 7 kinds of test dust
Is measured and the total area of the surface in contact with the plate 20 is measured.
Calculate the area ratio of the area contaminated with dust and attach it.
The contact area was used.

In the present invention, the shape of the convex portion is
The shape may be rib-like or dot-like, mountain-like, wavy or linear. The density of the convex portions per unit area of the sheet is preferably 1 / cm ² or more, and more preferably 5 to 40 / cm ² . The length or diameter 1 is preferably 10 mm or less, more preferably 0.3 mm to 10 mm. Also, the height h is
It is preferably 0.01 mm to 12 mm, and more preferably 0.05 mm to 8 mm.

Materials for forming the surface sheet 2 include natural fibers such as pulp and cotton, regenerated fibers such as rayon and cupra, synthetic fibers such as polyester, polyamide, polyolefin, acrylic and vinylon, and mixtures thereof. Examples thereof include materials that form a sheet-shaped fiber aggregate such as fiber raw materials. Further, as the above-mentioned molding material, a fiber mixture obtained by mixing hydrophilic fibers and thermoplastic fibers described below at a compounding ratio described below can be particularly preferably used.

The surface sheet 2 preferably contains thermoplastic fibers in an amount of 5 to 95% by weight, more preferably 10 to 7%.
It is preferably composed of a fiber mixture containing 5% by weight, and the basis weight is preferably 10 to 100 g / m ² , and more preferably 20 to 75 g / m ² . Then, in this case, when the convex portion of the surface sheet 2 is a rib-shaped or dot-shaped convex portion, the height maintained when the convex portion is wet is preferably 0.01 to 12 mm, More preferably 0.05 to 8 mm, most preferably 1 to 5 mm
Is. Further, when the convex portion is a wavy convex portion, the height maintained even when the convex portion is wet is preferably 0.2 to 10 mm, more preferably 0.5 to 7 mm, and most preferably Is preferably 0.8 to 5 mm.

When the blending ratio of the thermoplastic fiber in the fiber mixture is less than 5% by weight, it is difficult to maintain the shape of the convex portion of the surface sheet 2 when wet, resulting in poor finishability and operability. If it exceeds 95% by weight, the liquid permeation performance becomes poor, the absorptivity of waste liquid becomes poor, and the cleaning property becomes poor. Further, if the basis weight is less than 10 g / m ² , it becomes difficult to maintain the shape of the convex portion when it is wet, and the strength that can withstand the friction during the cleaning operation cannot be obtained. When it exceeds 100 g / m ² , the transfer of the liquid to the liquid absorber 3 becomes poor, and the disposable sheet costs more than necessary. When the height of the rib-shaped or dot-shaped convex portion is less than 0.01 mm or the height of the corrugated convex portion is less than 0.2 mm, the friction resistance of the cleaning sheet is increased and the operability is increased. May be defective or protected
When the polish is spread, foaming is likely to occur, resulting in poor finishability. Further, the rib-shaped or dot-shaped convex portion has a height of more than 12 mm or the wavy convex portion has a height higher than 12 mm. When it exceeds 10 mm, the liquid permeation performance is poor, the absorptivity of the waste liquid is deteriorated, and the cleaning property is deteriorated.

Here, "to be maintained even when wet" means
With the cleaning sheet of the present invention, it means that the place contaminated by liquid wetting is cleaned, and the shape of the convex portion (dot shape, rib shape, wavy shape, etc.) is maintained even if the cleaning sheet gets wet. However, specifically, for example, it means that the shape of the convex portion is maintained even when the cleaning sheet absorbs 100 parts by weight or more of water with respect to 100 parts by weight of the cleaning sheet. . Further, the "height of the rib-shaped or dot-shaped convex portion" is the average of the difference in height between the apex and the bottom point of the convex portion, and the "height of the wavy shape", It is the average of the heights of the top and bottom of the wavy convex portion.

As the above-mentioned thermoplastic fiber, in the case of imparting a rib-like or dot-like shape which is maintained even when wet, a fiber containing a heat-adhesive component having an average melting point of 160 ° C. or less, that is, high temperature (eg A fiber whose surface is partially melted by a heat treatment at 100 ° C. or higher and which acts to fix the shape is preferably used. For example, low melting point polyethylene terephthalate fiber, polyethylene fiber, ethylene vinyl alcohol fiber or polyvinyl alcohol fiber. Examples thereof include a core-sheath fiber having a low melting point type fiber as a sheath component and a high melting point type fiber as a core component, and a side-by-side one component of which is the above low melting point type fiber. On the other hand, when imparting a wavy shape that is maintained even when wet, pre-stretched polyethylene fibers, polypropylene fibers, polyethylene terephthalate fibers, and core-sheath fibers or side-by-side fibers containing these fibers as a core component. A thermoplastic heat-shrinkable fiber such as a fiber in which one component of the fiber shrinks by heating to shrink into a crimp shape can be used. The thermoplastic fiber may be a thermoplastic fiber hydrophilized by kneading a hydrophilizing agent or the like into the thermoplastic resin (hereinafter referred to as "hydrophilic thermoplastic fiber") or hydrophilized thermoplastic fiber. Plastic heat shrink fiber (hereinafter,
"Hydrophilic thermoplastic heat-shrinkable fiber") can be preferably used.

Further, used together with the above-mentioned thermoplastic fiber,
The fibers forming the surface sheet include hydrophilic cellulosic fibers such as hydrophilic pulp, cotton and rayon fibers; hydrophilic synthetic fibers; hydrophilic fibers such as hydrophilized polyester or polyolefin fibers. Can be mentioned. In particular, as the above-mentioned hydrophilized polyester-based or polyolefin-based fibers, for example, a fiber in which a hydrophilizing material is kneaded is preferably used.

When the thermoplastic heat-shrinkable fiber is used as the thermoplastic fiber, the blending ratio of the thermoplastic heat-shrinkable fiber in the fiber mixture is 10 to 90.
It is preferable that the content is 5% by weight, and when the hydrophilic thermoplastic fiber is used as the thermoplastic fiber, the blending ratio of the hydrophilic thermoplastic fiber in the fiber mixture is 5 to 9%.
It is preferably 5% by weight, and when the hydrophilic thermoplastic heat-shrinkable fiber is used as the thermoplastic fiber, the blending ratio of the hydrophilic thermoplastic heat-shrinkable fiber in the fiber mixture is 10 to 90% by weight. Is preferred.

The above fiber mixture contains 5 to 95% by weight of hydrophilic cellulosic fibers and 95 to 5 of hydrophilic thermoplastic fibers.
Fiber mixture with 10% by weight (hereinafter, "fiber mixture A" means this fiber mixture), or 10 to 90% by weight of hydrophilic cellulosic fiber and 90 to 10% by weight of hydrophilic thermoplastic heat-shrinkable fiber. A fiber mixture with (hereinafter, "fiber mixture B" means this fiber mixture) is particularly preferably used. The apparent thickness of the surface sheet (including the height of the convex portion) is 0.5 to 15 mm.
Is preferred.

The surface sheet having the rib-shaped or dot-shaped convex portion or the corrugated convex portion can be manufactured from the fiber mixture as follows. That is, the surface sheet having the rib-shaped or dot-shaped convex portion, to form a sheet by papermaking the thermoplastic fiber and the hydrophilic fiber, or to give the obtained sheet embossing or heat embossing, Alternatively, when a sheet is produced by a wet papermaking method, it can be produced by engraving an uneven pattern on a sheet while being wet with water using a papermaking wire having an uneven pattern. Further, the surface sheet having the wavy convex portion,
A sheet containing the thermoplastic heat-shrinkable fiber or the hydrophilic thermoplastic heat-shrinkable fiber is subjected to heat-shrinking or heat-shrinking after the heat-shrinkable sheet or the heat-shrinkable net and the non-heat-shrinkable sheet are integrated. It can be manufactured.

Specifically, when a mere thermoplastic fiber or the hydrophilic thermoplastic fiber is used as the thermoplastic fiber, the embossing treatment is performed at 110 to 220 ° C. to form a rib shape or a dot shape. When the above thermoplastic heat shrinkable fiber or the above hydrophilic thermoplastic heat shrinkable fiber is used as the above thermoplastic fiber, the above-mentioned surface sheet having a convex portion of is obtained at 130 to 220 ° C. for 3 to 120 seconds. By performing the heat treatment, the above-mentioned surface sheet having a wavy convex portion is obtained. Therefore, the surface sheet using the fiber mixture A is preferably one in which rib-shaped or dot-shaped convex portions are formed by embossing treatment, and the surface sheet using the fiber mixture B is subjected to the heat-heat shrinkage treatment. It is preferable that the corrugated convex part is formed.

When the blending ratio of the thermoplastic fiber in the fiber mixture is less than 5% by weight, it is difficult to maintain the uneven shape or the wavy shape of the topsheet 2 when wet, resulting in poor finishability and operability. Become. If it exceeds 95% by weight, the liquid permeation performance becomes poor, the absorptivity of waste liquid becomes poor, and the cleaning property becomes poor. Further, if the basis weight is less than 10 g / m ² , it becomes difficult to maintain the shape of the uneven shape or the wavy shape when wet, and the strength that can withstand the friction during the cleaning operation cannot be obtained. When it exceeds 100 g / m ² , the transfer of the liquid to the liquid absorber 3 becomes poor, and the disposable sheet costs more than necessary. If the height of the uneven shape is less than 0.02 mm or the height of the wavy shape is less than 0.2 mm, the friction resistance of the cleaning sheet becomes large and the operability becomes poor. Furthermore, when the protective / polishing agent is spread, foaming tends to occur, resulting in poor finish. If the height of the uneven shape is more than 12 mm or the height of the wavy shape is more than 10 mm, the liquid permeation performance is poor, the absorptivity of the waste liquid is deteriorated, and the washability becomes poor. Is preferred.

The liquid absorbent laminated on the surface sheet includes a fiber laminate mainly composed of pulp fibers, an absorbent sheet composed mainly of pulp fibers or an absorbent sheet laminated in which a plurality of the absorbent sheets are laminated. The body or the like can be used.

The pulp fibers used in the fiber laminate are, in addition to ordinary pulp fibers, mercerized pulp modified to have an elliptical cross section by alkali treatment, crimp pulp modified with a crosslinking agent, and the like. Can be mentioned. The above-mentioned fiber laminate means one in which a large number of fibers are simply laminated by compression or the like, and may be formed of only the above pulp fibers, and may also include other fibers such as rayon fibers and thermoplastic fibers. It may be formed of. At this time, the content of the other fibers is preferably 5 to 30% by weight.

As the pulp fiber used in the absorbent sheet, the same pulp fiber used in the fiber laminate is used. Further, as the above fibers, only the above pulp fibers may be used, but in addition to the above pulp fibers, other fibers such as rayon fibers and thermoplastic fibers may be mixed and used. At this time, the content of the other fibers is preferably 5 to 30% by weight. The absorbent sheet is a sheet obtained by subjecting the fibers to a wet papermaking method or a dry pulp sheet manufacturing method including latex bond and thermal bond, and has a thickness of 0.3.
It is preferably -5 mm. Further, the absorbent sheet laminate has a plurality of absorbent sheets, preferably 2 to 10.
It is a stack of sheets.

Further, the liquid absorbent preferably contains a polymer absorbent in a fibrous form. Therefore, as the liquid absorbent, the fiber laminate, the absorbent sheet or the absorbent sheet laminate containing a fibrous or powdery polymer absorbent is particularly preferably used. Here, the average major axis length when the polymer absorbent is fibrous is 1 to
It is preferably 10 mm, and the fiber diameter length is 0.5 to 3
It is preferably d (denier). Further, the average particle diameter in the case of powder is preferably 100 to 1,000 μm. Examples of the polymer absorbers include polyacrylate type, starch graft polymer type, polyvinyl alcohol type and carboxymethyl cellulose type.

As a mode in which the liquid absorbent contains the polymer absorbent, a mode in which each fiber and the polymer absorbent are uniformly dispersed and laminated to form a fiber laminate, A mode in which the polymer absorbent is uniformly dispersed to form an absorbent sheet, a mode in which the absorbent sheets are laminated to form an absorbent sheet laminate, and a polymer absorbent between the absorbent sheets not containing the polymer absorbent Examples include a mode in which the body is evenly dispersed to form an absorbent sheet laminated absorbent body.

When the polymer absorbent is used, the amount of the polymer absorbent blended is preferably 10 to 50 parts by weight with respect to 100 parts by weight of the pulp fiber.

The thickness of the liquid absorber is 1 to 10 m.
It is preferably m.

The mounting sheet to be laminated on the liquid absorber may be a liquid impermeable film sheet or a laminate sheet of the film sheet and another sheet. The basis weight of the mounting sheet is 10 to 100.
It is preferably g / m ² , and its thickness is 0.3 to 3
It is preferably mm. When the basis weight is less than 10 g / m ² , sufficient strength for mounting the cleaning sheet on the mop-like cleaning tool cannot be obtained, and when it exceeds 100 g / m ² ,
The flexibility of the mounting sheet is poor and unnecessary costs are incurred.

Examples of the film sheet include polyethylene type sheets, polypropylene type sheets, polyester type sheets and the like. In addition, examples of the above-mentioned other sheets used for the laminate sheet include a heat-adhesive non-woven fabric and a composite sheet of the heat-adhesive non-woven fabric and a film sheet from the viewpoint of improving strength and flexibility.
Further, in the above-mentioned laminated sheet, the above-mentioned other sheet can be laminated on one or both of the front surface and the back surface of the film sheet.

Since the cleaning sheet of the present invention has the above-mentioned surface sheet as described above, the liquid detergent can be wiped off with excellent operability. In addition, the mounting sheet,
Since it is soft, cloth-like, and highly flexible, it is easily attached to the cleaning unit, and since it does not permeate liquid, it does not contaminate the cleaning unit of the mop-like cleaning tool with the absorbed cleaning liquid. Further, since it has the above-mentioned liquid absorber, it can be efficiently cleaned even in a large area, and is excellent in wiping off dirt due to liquid wetting. Further, when the surface sheet has the convex portion, when the liquid detergent is wiped off, and also when the protective / polishing agent is uniformly applied to the floor surface, it suppresses foaming, and thus the finish of the wiped surface is excellent, Also,
Has low friction resistance and excellent operability. Further, since the above relational expression is satisfied, even if a large amount of liquid is absorbed during cleaning, it does not come off from the cleaning tool.

Next, with reference to FIGS. 6 and 7, the form of the cleaning sheet of the present invention will be specifically illustrated and described. In the cleaning sheet 1 of the form shown in FIG. 6, a top sheet 2 having rectangular dot-shaped protrusions covers the surface and side surfaces of the liquid absorber 3, and a mounting sheet is provided at each edge of the top sheet 2. It is formed by being bonded to No. 4. In addition, the size of each convex portion in the irregular shape (N shown in FIG. 6) is 0.5 to 1.0.
The distance between the protrusions (S in FIG. 6) is preferably 0.5 to 1.0 mm.

Further, the cleaning sheet 1 having the form shown in FIG.
The topsheet 2, the liquid absorber 3, and the mounting sheet 4 are sequentially laminated, and the topsheet 2 has a corrugated shape.

More specifically, in the cleaning sheet 1 of the present embodiment shown in FIG. 7, the surface sheet 2 having the wavy convex portions is the surface of the liquid absorbent body 3 in which four absorbent sheets 3a are laminated. And the side surface are covered, and each edge portion of the topsheet 2 is adhered to the mounting sheet 4, and the topsheet 2, the liquid absorber 3, and the mounting sheet 4 are sequentially laminated. Further, the width (T shown in FIG. 7) of each wavy portion of the above wavy shape is preferably 2 to 30 mm.

The mounting sheet of the present invention is shown in FIGS.
The form shown in is not limited at all, and various modifications can be made without departing from the spirit of the present invention. For example,
6 and 7, the mounting sheet is wider than the top sheet, but the width of the top sheet and the width of the mounting sheet may be the same.
The width of the topsheet may be wider, and the topsheet may be fitted and mounted in the sheet holder.

The mirror surface treatment need not be performed on the entire surface of the film as long as the holding force x and the static friction coefficient y satisfying the above relational expression can be obtained. For example, as shown in FIG. You may perform a mirror surface process and may form the pattern-shaped mirror surface process part 4a.

[0049]

EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited thereto.

Example 1 A cleaning sheet shown in FIG. 6 was obtained by using the following as the surface sheet 2, the liquid absorber 3 and the mounting sheet 4, respectively. The height L of the uneven shape of the surface sheet 2 is 1.0 mm, and the size N of each convex portion is N.
Is 1.0 mm, and the interval S between each convex portion is 1.0 mm
Met. The relationship between the coefficient of static friction y and the holding force x in this cleaning sheet satisfied the above relational expression.

Surface sheet 2; softwood kraft pulp / short fiber rayon / thermoplastic fiber [Teijin Co., Ltd., heat fusible polyester, trade name “TJ04CN”, melting point 110 ° C.] = 40
A sheet is prepared from a mixed fiber raw material of / 40/20 by an ordinary wet papermaking method, and further heat-embossed by using an embossing roll having a cubic uneven pattern (processing temperature 1
50 ° C.) is used to give an uneven shape. Liquid absorber 3; a fiber laminate having a thickness of 2.5 mm and a basis weight of 50 g / m ² obtained by uniformly dispersing 20 parts by weight of acrylic acid-based water-absorbing polymer as a polymer absorber in 80 parts by weight of pulp. Using. The mounting sheet 4 is a laminated film having a thickness of 0.3 mm and a basis weight of 30 g / m ² , which is formed by laminating a spunbonded nonwoven fabric made of a polyethylene / polyester blended cotton material on one surface of the polyethylene film. The entire surface of the polyethylene film in 1 was mirror-finished with a mirror-finish roll.

Example 2 The cleaning sheet shown in FIG. 7 was obtained by using the following as the surface sheet 2, the liquid absorber 3 and the mounting sheet 4, respectively. The height M of the wavy shape is 0.8 to 1.2 mm, and the width T of each wavy shape is
Is 3 to 10 mm. The relationship between the coefficient of static friction y and the holding force x in this cleaning sheet satisfies the above relational expression.

Surface sheet 2; 60 parts by weight of softwood kraft pulp which is a cellulosic fiber, and W-ESC having a melting point of 130 ° C which is a hydrophilic thermoplastic heat-shrinkable fiber [Chisso Corporation]
A core / sheath fiber, core: polypropylene, sheath: hydrophilic polyethylene] 40 parts by weight of a fiber-mixed raw material is used to prepare a sheet by an ordinary wet papermaking method, which is cut into a specific size, and then blown electric. A sheet having a corrugated convex portion having a thickness of 1.4 mm and a basis weight of 40 g / m ² obtained by heat treatment at 165 ° C. for 10 minutes in a dryer was used. Liquid absorber 3; thickness 0.35 mm consisting of 60 parts by weight of extra-thick pulp and 40 parts by weight of pulp, thickness 1.5 mm formed by laminating four absorption sheets of 40 g / m ² basis weight, basis weight 160
A g / m ² absorbent sheet laminate was used. Wearing sheet 4; 0.3 m thick formed by laminating a suction heat bond nonwoven fabric made of a polyester / polyethylene mixed cotton raw material on one side of a polyethylene film
A laminate film of m and a basis weight of 40 g / m ² was used, which was obtained by subjecting the entire surface of the polyethylene film to a mirror surface treatment with a mirror surface roll.

[Test Example] The cleaning sheet of the first embodiment shown in FIG. 6 has a static friction coefficient y and a holding force x respectively [Table 1].
Various kinds were prepared so as to have the values shown in FIG. The results are shown in [Table 1].
The coefficient of static friction y was adjusted by reprocessing the surface of the film mirror-finished by a mirror roll with rolls having different surface roughness, and the holding force x was adjusted by changing the thickness of the mounting sheet.

<Test method> A cleaning sheet was attached to the cleaning tool, and 5 g of water was added to the flooring floor (Matsushita Electric Works, Ltd.).
m ^{2 was} sprayed and reciprocated 50 times while scrubbing in the same manner as in normal wet cleaning, and the mounting state at that time was evaluated according to the following evaluation criteria.

[0056]

[Table 1]

[0057]

INDUSTRIAL APPLICABILITY The cleaning sheet of the present invention is capable of easily removing stains and stains on floors, cleaning floors for protection and polishing, wet cleaning such as cleaning, and absorbing liquids in general households. Even if it does not come off easily, it can be attached to a mop-like cleaning tool and used.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which a cleaning sheet of the present invention is attached to a cleaning tool.

FIG. 2 is a perspective view of the cleaning sheet of the present invention shown in FIG.

FIG. 3 is a perspective view of the cleaning tool shown in FIG. 1.

FIG. 4 is a perspective view showing an outline of a method of measuring a coefficient of static friction.

5 (a) and 5 (b) are schematic diagrams showing an outline of a method for measuring a holding force.

FIG. 6 is a cross-sectional view showing a first form of the cleaning sheet of the present invention (a cross-sectional view taken along the line II ′ of the cleaning sheet shown in FIG. 2, with a part thereof omitted); ).

FIG. 7 is a cross-sectional view (corresponding to FIG. 6) showing a second form of the cleaning sheet of the present invention.

FIG. 8 is a plan view showing one form of a mounting sheet used for the cleaning sheet of the present invention.

[Explanation of symbols]

1 cleaning sheet 2 Top sheet 3 liquid absorber 4 mounting sheet 10 cleaning tools 11 Cleaning department 12 handles

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Keiji Abe 2606 Akabane Kai, Haga-gun, Tochigi Prefecture Kao Corporation Research Institute (58) Research field (Int.Cl. ⁷ , DB name) A47L 13/16 A47L 13 / 20

Claims (9)

(57) [Claims] 1. A cleaning tool comprising a cleaning unit and a rod-shaped handle connected to the cleaning unit, wherein the cleaning unit is provided with a sheet holding unit for fitting and holding both side portions of a sheet. A cleaning sheet that is mounted to cover the lower surface of the cleaning unit, the liquid-permeable surface sheet, the liquid-impermeable mounting sheet that contacts the cleaning unit, and the surface sheet and the mounting sheet. The sheet holding part has a holding force x (g) of 10 g or more, and a static friction coefficient y (when attached to the cleaning part of the attached sheet) tan θ) has a relationship represented by the following relational expression. y> -0.0005x + 0.5 ... 2. The cleaning sheet according to claim 1, wherein the mounting sheet has gloss. 3. The surface sheet has a large number of protrusions, and the area of the protrusions contacting the surface to be cleaned at the time of cleaning is 5 to 60% with respect to the entire surface sheet. The cleaning sheet according to claim 1, wherein the cleaning sheet is a cleaning sheet. 4. The surface sheet comprises 5 to 5 thermoplastic fibers.
Included in a blending ratio of 95% by weight, the basis weight is 10 to 100
It is a sheet of g / m ² and has rib-like or dot-like protrusions with a height of 0.01 to 12 mm or wavy protrusions with a height of 0.2 to 10 mm, which is maintained even when wet. The method according to claim 1, wherein
Cleaning sheet . 5. The surface sheet comprises hydrophilic cellulose fibers 5 to 95% by weight and hydrophilicized thermoplastic fibers 95 to 95% by weight.
The cleaning sheet according to claim 1 , wherein the cleaning sheet is composed of a fiber mixture with 5% by weight and has rib-shaped or dot-shaped convex portions. 6. The mounting sheet is made of a fiber mixture of 10 to 90% by weight of hydrophilic cellulosic fibers and 90 to 10% by weight of hydrophilized thermoplastic shrinkable fibers, and has a wavy shape. The cleaning sheet according to claim 1. 7. A further laminate sheet of the film sheet or the film sheet of the backsheet is liquid impermeable, the basis weight, in claim 1, characterized in that a 10 to 100 g / m ² The cleaning sheet described . 8. The absorbent body comprises a fiber laminated body mainly composed of pulp fibers, an absorbent sheet composed of a fiber aggregate mainly composed of pulp fibers, or an absorbent sheet laminated body formed by laminating a plurality of the absorbent sheets. The cleaning sheet according to any one of claims 1 to 9. 9. The cleaning sheet according to claim 1, wherein the liquid absorbent contains a polymer absorbent in a fibrous form.