JP6677676B2 - Cleaning sheet - Google Patents

Description

  The present invention relates to a cleaning sheet.

Conventionally, for example, in a cleaning sheet used for cleaning a floor surface, etc., unevenness is formed on the sheet by various patterns in order to improve bulk and thickness, reduce frictional resistance, improve dust collecting performance, and the like. Has been done.
In such a cleaning sheet, a so-called wet sheet to which a chemical solution is applied is widely used, and a layer structure is used in order to enhance water retention and sustained release of the chemical solution.
For example, a sheet in which a core layer is embossed (see Patent Document 1), a sheet in which a water absorbing polymer is used in a core layer (see Patent Document 2), and the like have been proposed.

Japanese Patent No. 3450691 Japanese Patent No. 4033725

  However, in the above-mentioned Patent Documents 1 and 2, although the water retention of the sheet itself is increased, the chemical solution is released at a burst in the initial stage of the cleaning operation, and the chemical solution may not be released in the latter half of the cleaning operation.

  An object of the present invention is to provide a cleaning sheet which is excellent in collecting property and can gradually release a chemical solution during cleaning.

In order to solve the above problems, the invention described in claim 1 is:
In a cleaning sheet to which a chemical solution is attached, which is replaceably attached to a flat cleaning tool,
Forming a cleaning surface covering the bottom surface of the cleaning tool, being bent along a longitudinal edge of the cleaning tool and locked to the upper surface of the cleaning tool;
Non-embossed portions sheet over preparative has a brushed not been compressed in the thickness direction, the longitudinal direction while being arranged in two rows in the cleaning sheet, over the whole body except the non-embossed portion is disposed regions, An embossed part where the sheet is compressed in the thickness direction is arranged,
A row of the non-embossed portions is provided along each of the two rows of bent portions bent along the longitudinal edge,
Each of the non-embossed portions has a shape having a concave portion opened to the longitudinal edge portion of the cleaning tool when mounted on the cleaning tool.
Advantageous Effects of Invention According to the present invention, it is possible to provide a cleaning sheet which is excellent in collecting property and can gradually release a chemical solution during cleaning. In addition, since a plurality of non-embossed portions are arranged at predetermined intervals along the bent portion, the amount of discharged liquid can be more easily controlled, and the collecting property can be further improved. In addition, since the non-embossed portion has a concave portion opened to the longitudinal edge portion of the cleaning tool when mounted on the cleaning tool, the collection performance can be further improved.

The invention according to claim 2 is
In a cleaning sheet to which a chemical solution is attached, which is replaceably attached to a flat cleaning tool,
Forming a cleaning surface covering the bottom surface of the cleaning tool, being bent along a longitudinal edge of the cleaning tool and locked to the upper surface of the cleaning tool;
Non-embossed portions sheet over preparative has a brushed not been compressed in the thickness direction, the longitudinal direction while being arranged in two rows in the cleaning sheet, over the whole body except the non-embossed portion is disposed regions, An embossed part where the sheet is compressed in the thickness direction is arranged,
A row of the non-embossed portions is provided along each of the two rows of bent portions bent along the longitudinal edge,
The embossed portion,
A first protrusion protruding from the surface of the sheet;
A second projection further projecting from the top of the first projection;
It is characterized by having.
Advantageous Effects of Invention According to the present invention, it is possible to provide a cleaning sheet which is excellent in collecting property and can gradually release a chemical solution during cleaning. In addition, since a plurality of non-embossed portions are arranged at predetermined intervals along the bent portion, the amount of discharged liquid can be more easily controlled, and the collecting property can be further improved. Further, since the embossed portion includes the first convex portion protruding from the surface of the sheet and the second convex portion further protruding from the top of the first convex portion, the liquid discharge amount can be more easily controlled and the collecting property can be improved. Can be further enhanced.

According to a third aspect of the present invention, in the cleaning sheet according to the first or second aspect,
An outer layer forming a surface of the cleaning sheet,
An inner layer sandwiched between the outer layers and having a liquid retaining property,
It is characterized by having.
ADVANTAGE OF THE INVENTION According to this invention, the chemical | medical solution hold | maintained amount can be increased.
According to a fourth aspect of the present invention, in the cleaning sheet according to any one of the first to third aspects,
The embossed portion has a length of 2 mm to 5 mm in the longitudinal direction and 5 mm to 10 mm in the short direction,
The non-embossed portion has a length of 40 mm to 70 mm in the longitudinal direction and 15 mm to 70 mm in the short direction.

  ADVANTAGE OF THE INVENTION According to this invention, the sheet | seat for cleaning which is excellent in collection property and can discharge | release a chemical | medical solution gradually at the time of cleaning can be provided.

It is a figure showing the state at the time of use of the sheet for cleaning of this embodiment. It is a top view showing an example of a sheet for cleaning. FIG. 3 is a sectional view taken along line III-III in FIG. 2. FIG. 3 is an enlarged view of a portion A in FIG. 2. FIG. 5 is a sectional view taken along line VV in FIG. 4. It is a figure which shows the modification of a non-emboss part. It is a figure which shows the modification of a non-emboss part.

Hereinafter, a specific mode of the cleaning sheet 100 according to the embodiment of the present invention will be described with reference to FIGS. 1 to 5. However, the technical scope of the present invention is not limited to the illustrated example.
For convenience, as shown in FIGS. 1 to 5, the X direction, the Y direction, and the Z direction, and the front, rear, left, right, and top and bottom will be described.

(Configuration of the embodiment)
FIG. 1 is a diagram illustrating a state when the cleaning sheet 100 according to the present embodiment is used.
As shown in FIG. 1, the cleaning sheet 100 is exchangeably mounted on a cleaning tool 200 including, for example, a rectangular flat plate-shaped head portion 201 and a handle portion 202 attached to the upper surface of the head portion 201. Wet sheet to be used.
The cleaning sheet 100 covers the bottom surface of the head 201 of the cleaning tool 200 to form a cleaning surface, is bent along the longitudinal edge 201a of the head 201 of the cleaning tool, and is locked on the upper surface of the head 201. , It will be in a mounted state.
Note that the longitudinal edge 201a refers to an edge of the head 201 along the longitudinal direction. That is, it indicates the longer two edges of the four edges of the rectangular head 201.

FIG. 2 is a plan view illustrating an example of the cleaning sheet 100 according to the present embodiment.
As shown in FIG. 2, the cleaning sheet 100 has a rectangular shape that is long in the X direction, and for example, 250 mm to 300 mm, preferably 260 mm to 290 mm in the X direction (longitudinal direction), and the Y direction (short direction). )), It is formed to have a thickness of 180 mm to 230 mm, preferably 200 mm to 210 mm.

FIG. 3 is a sectional view taken along line III-III in FIG.
The cleaning sheet 100 is formed by laminating a plurality of base papers and applying a chemical solution thereto. For example, as shown in FIG. 2, outer layers 11 and 11 that form a surface layer of the cleaning sheet 100, An inner layer 12 sandwiched between 11, 11 has a layered structure.

The outer layer 11 is mainly formed of a hydrophobic fiber. As the hydrophobic fiber, a chemical fiber containing polyethylene terephthalate, polypropylene, polyethylene or the like as a main component is applied.
The outer layer 11 preferably has a blending ratio of polyethylene terephthalate fiber of 80% or more, and a fiber diameter of 3.3 dtex or more. By setting the fiber diameter to 3.3 dtex or more, the rigidity (cushioning property) of the fiber is improved, and the fiber can be operated with a light force. In addition, the polyethylene terephthalate fiber having a large fiber diameter of 3.3 dtex or more secures a space between fibers, prevents a capillary phenomenon from occurring, and can prevent the chemical solution from excessively flowing from the inner layer 12 to the outer layer 11.
The outer surface of the outer layer 11 is the surface of the cleaning sheet 100.

The inner layer 12 includes, for example, a water retaining layer having a liquid retaining property.
The water retention layer is mainly formed of, for example, hydrophilic fibers, and the hydrophilic fibers are impregnated with a chemical solution. In addition, as the hydrophilic fiber, for example, natural fibers such as pulp, cotton, and hemp, or cellulosic chemical fibers such as rayon and acetate are applied.From the viewpoint of maintaining water retention, pulp or pulp air laid is used. Is preferred.
The inner layer 12 is preferably made of only hydrophilic fibers, but may suitably contain hydrophobic fibers such as polypropylene spunbond as a reinforcing layer.

  Examples of the chemical solution include a solution obtained by dissolving a lower alcohol such as ethanol, a surfactant or a bactericide such as benzalkonium chloride, and propylene glycol monomethyl ether (PGME) in water.

  Note that the sheet structure of the cleaning sheet 100 described above is merely an example, and the number of layers, fibers that can be contained in each layer, and the like can be appropriately changed.

Returning to FIG. 2, a portion of the cleaning sheet 100 that is bent along the longitudinal edge 201 a of the head 201 of the cleaning tool 200 is referred to as a bent portion S.
The approximate position of the bent portion S is set in advance in accordance with the specified head portion 201 of the cleaning tool 200. That is, two rows of bent portions S extending in the X direction are set at predetermined positions in the Y direction of the cleaning sheet 100. Note that, for the bent portion S, for example, a straight line corresponding to the bent portion S may be printed in advance on the cleaning sheet 100, or the bent portion S may be printed on the cleaning sheet 100 so that the user can recognize it. A corresponding polygonal line may be formed.
A plurality of non-embossed portions 30 are arranged at predetermined intervals in the X direction along the bent portion S of the cleaning sheet 100, and the entire non-embossed portion 30 of the cleaning sheet 100 except for the region where the non-embossed portions 30 are arranged. Thus, an embossed portion 20 is arranged.
As a result, the embossed portions 20 and the non-embossed portions 30 are alternately arranged at positions corresponding to the longitudinal edges 201a of the head portion 201 of the cleaning tool 200 in the cleaning sheet 100.

(Embossed part)
The embossed portion 20 is a portion of the cleaning sheet 100 where the sheet is compressed in the thickness direction.
The embossed portion 20 can be formed, for example, by hot embossing under the conditions of a temperature of 80 to 150 ° C. and an emboss pressure of 0.2 to 1.0 MPa.

FIG. 4 is an enlarged view of the area A in FIG. FIG. 5 is a sectional view taken along line VV in FIG.
As shown in FIGS. 4 and 5, the embossed portion 20 has a convex emboss 21 that is convex upward (one surface of the cleaning sheet 100) and a convex emboss 21 that is convex downward (the other surface of the cleaning sheet 100). And a concave emboss 22 (that is, concave on the upper side).
The convex embosses 21 and the concave embosses 22 are alternately arranged so as to be alternately arranged in both the X direction and the Y direction. In this way, by regularly arranging the convex embosses 21 and the concave embosses 22 alternately, it is possible to improve the dust collecting performance.

  In the embossed portion 20, an intermediate portion 23 is formed between the convex emboss 21 and the concave emboss 22 which are alternately arranged. The intermediate portion 23 is a portion where the convex emboss 21 and the concave emboss 22 are not formed. Therefore, the intermediate portion 23 is at a position lower than the convex emboss 21 and higher than the concave emboss 22 in the Z direction.

  In addition, it is not essential to use the embossed pattern as described above, and although the effect of improving the dust collecting property is weakened, the embossed pattern in which the convex emboss 21 or the concave emboss 22 is arranged in a line, or the irregular emboss pattern 21 Embossed patterns arranged side by side may be used. Further, for example, it is also possible to provide only one of the convex emboss 21 and the concave emboss 22.

(Convex emboss)
As shown in FIG. 4, the convex emboss 21 is formed in a so-called gourd shape having a narrow width in the X direction and a constricted portion at the center in the Y direction in plan view. In addition, although the above-mentioned shape is preferable from the viewpoint of dust collecting property, the shape of the convex emboss 21 is not limited thereto, and for example, it can be formed into various shapes such as a circle, an ellipse, and a polygon. is there. Further, the shapes may be combined.
The convex emboss 21 is 2 mm to 5 mm, preferably 3 mm to 4 mm in the X direction, 5 mm to 10 mm, preferably 6 mm to 8 mm in the Y direction, and 0.5 mm (height from the intermediate portion 23) in the Z direction. It is formed to a thickness of 2 mm, preferably 0.7 mm to 1.5 mm.

  Further, as shown in FIG. 5, the convex emboss 21 is formed in a shape that gradually becomes convex upward in a cross-sectional view. That is, in a cross-sectional view, a second convex portion 21b projecting further upward is formed at the top of the first convex portion 21a projecting from the surface (upper surface) of the sheet. With this configuration, the cushioning property of the cleaning sheet 100 can be improved.

(Concave emboss)
As shown in FIG. 4, the concave emboss 22 is formed in a so-called gourd shape having substantially the same shape as the convex emboss 21 in plan view. Note that the shape of the concave emboss 22 is not limited to this, and it is possible to form the concave emboss 22 in various shapes, and may be different from the shape of the convex emboss 21.
As shown in FIG. 5, the concave emboss 22 is formed to have a shape that is stepwise concave toward the lower side, which is upside down with respect to the convex emboss 21 in a sectional view. That is, in a cross-sectional view, a second recess 22b projecting further downward is formed at the top of the first recess 22a projecting from the surface (lower surface) of the sheet. With this configuration, the cushioning property of the cleaning sheet 100 can be improved.

(Non-embossed part)
The non-embossed portion 30 is a portion of the cleaning sheet 100 where the sheet is not compressed in the thickness direction and has a nap, and a plurality of non-embossed portions are arranged along the row-shaped bent portions S of the cleaning sheet 100. Have been.
Here, the “raised” refers to a fluffy and air-retaining portion originally possessed by the nonwoven fabric before hot embossing (before compressing the sheet in the thickness direction). The non-embossed portion 30 can hold the liquid medicine by the air holding the raised hair.
The non-embossed portion 30 can be formed by designing the embossing roll forming the embossed portion 20 so as to remove the shape of the non-embossed portion 30.
The non-embossed portion 30 is not limited to the case where no compression is performed at all, and may be slightly compressed as compared with the portion where the embossed portion 20 is compressed to the extent that the raised portion remains.
The size of the non-embossed portion 30 is 40 mm to 70 mm, preferably 50 mm to 60 mm in the X direction, and 15 mm to 70 mm, preferably 20 mm to 50 mm in the Y direction.
By setting as described above, when forming a bent line corresponding to the bent portion S on the cleaning sheet 100 at the time of manufacturing, the bent line is formed at an appropriate position even if the bent line meanders due to the device. be able to.

(Recess)
Each of the non-embossed portions 30 preferably has a shape having a concave portion 31 opened to the longitudinal edge portion 201a of the head portion 201 when the cleaning sheet 100 is mounted on the cleaning tool 200.
Specifically, for example, as shown in FIG. 2, the non-embossed portion 30 has a V-shaped plan view opening rightward or leftward, that is, opening from the center of the rectangular cleaning sheet 100 to the long side. Can be formed. That is, the non-embossed portion 30 having a V-shape in plan view has the V-shaped concave portion 31.
Accordingly, when cleaning is performed by moving the cleaning sheet 100 in the Y direction, that is, a direction parallel to the short side of the cleaning sheet 100, dust easily accumulates in the concave portion 31 and the dust collecting property is further improved. be able to.

In addition, as shown in FIG. 2, the non-embossed portions 30 are arranged so that the positions in the X direction are shifted for each row and are alternated. That is, the non-embossed portion 30 along the bent portion S corresponding to one of the long edge portions 201a of the head portion 201 and the non-embossed portion along the bent portion S corresponding to the other of the long edge portion 201a of the head portion 201. The portion 30 is disposed at a different position in the extending direction of the bent portion S.
Thereby, when cleaning is performed by moving the cleaning sheet 100 in the Y direction, that is, in a direction parallel to the short side of the cleaning sheet 100, the collecting properties complement each other, and the floor surface is closed without gaps. Since the non-embossed portion 30 passes, it is possible to enhance the dust collecting property.

(How to use the cleaning sheet)
Next, a method of using the cleaning sheet 100 will be described.
In use, the cleaning sheet 100 is attached to the rectangular flat head 201 of the cleaning tool 200.
Specifically, the head section 201 is placed on the cleaning sheet 100 such that the longitudinal edges 201a of the head section 201 are aligned with the two rows of bent sections S extending in the X direction of the cleaning sheet 100. Is placed. Next, the cleaning sheet 100 is bent along the longitudinal edge portion 201 a of the head portion 201, and both sides of the bent sheet are locked on the upper surface of the head portion 201.
Thereby, for example, as shown in FIG. 1, the central part in the Y direction of the cleaning sheet 100 covers the bottom surface of the head part 201 of the cleaning tool 200 to form a cleaning surface. , The embossed portions 20 and the non-embossed portions 30 are alternately arranged along the bent portion S.

In this state, when the cleaning sheet 100 is mainly moved in the Y direction, that is, in the short direction, to perform cleaning, in the initial stage of the cleaning operation, the pressing force applied to the cleaning sheet 100 from the bottom surface of the head portion 201. Then, the drug solution held in the embossed portion 20 is released.
Specifically, the embossed portion 20 gradually collapses with the second convex portion 21b and the first convex portion 21a (or the second concave portion 22b and the first concave portion 22a), and the area of the cleaning surface gradually increases. Along with this, the chemicals held in the second convex portion 21b and the first convex portion 21a (or the second concave portion 22b and the first concave portion 22a) are sequentially released.

  Note that the cleaning sheet 100 can be turned upside down and mounted again for use. In this case, the chemical solution held by the embossed portion 20 located above the cleaning sheet 100 at the time of the first cleaning is gradually released.

  Then, in a later stage of the cleaning operation, by applying a pressing force to the non-embossed portion 30 at the longitudinal edge portion 201a of the head portion 201, it is possible to discharge the drug solution held by the raised hair of the non-embossed portion 30. For example, the chemical solution can be discharged to the stage of, for example, finishing wiping of a cleaning portion.

In the cleaning sheet 100, fine dust such as sand dust and house dust can be scraped off by the embossed portion 20, and coarse dust such as hair and fiber dust can be entangled by raising the non-embossed portion 30.
More specifically, coarse dust accumulates in the concave portion 31 of the non-embossed portion 30, and fine dust can be scraped off by the embossed portion 20 between the non-embossed portions 30 and the embossed portion 20 arranged on the cleaning surface.

  Also, in forming the embossed portion 20 and the non-embossed portion 30 in the cleaning sheet 100, since the basis weight of the cleaning sheet 100 is not changed in each part, the strength of the cleaning sheet 100 is not impaired, During cleaning, the cleaning sheet 100 does not twist or break.

(Effects of the embodiment)
As described above, the cleaning sheet 100 according to the present embodiment is a cleaning sheet 100 provided with a chemical solution, which is attached to the flat head part 201 of the cleaning tool 200 so as to be exchangeable. Is formed along the longitudinal edge 201a of the head portion 201 and is locked on the upper surface of the head portion 201, and the bent portion S is folded along the longitudinal edge 201a. The embossed portions 20 in which the sheet is compressed in the thickness direction and the non-embossed portions 30 having uncompressed raised hairs are alternately arranged.
For this reason, since the non-embossed portion 30 can hold the chemical solution, the liquid retention can be maintained for a long time, and the longitudinal edge 201a of the head portion 201 faces the non-embossed portion 30. Therefore, the pressing force is applied to the non-embossed portion 30 by the longitudinal edge portion 201a, and the liquid can be discharged also in the latter half of the cleaning operation.
Moreover, since each part of the embossed part 20 and the non-embossed part 30 respectively collects fine dust and coarse dust, the dust collecting property can be improved.
Therefore, it is possible to obtain the cleaning sheet 100 which is excellent in collecting property and can gradually release the chemical solution during cleaning.

Further, according to the present embodiment, there are provided outer layers 11, 11 forming the surface of cleaning sheet 100, and inner layer 12 sandwiched between outer layers 11, 11 and having a liquid retaining property.
Therefore, the amount of liquid retained by the inner layer 12 can be increased.

Further, according to the present embodiment, according to the present embodiment, a plurality of non-embossed portions 30 are arranged at predetermined intervals along the bent portion S.
For this reason, a region for discharging the liquid is formed at predetermined intervals along the longitudinal edge portion 201a of the head portion 201, so that the liquid discharge amount can be more easily controlled.
In addition, since a region for collecting coarse dust is formed at predetermined intervals along the longitudinal edge portion 201a of the head portion 201, the collecting performance can be further improved.

Further, according to the present embodiment, each of the non-embossed portions 30 has a shape having the concave portion 31 opened to the longitudinal edge portion 201a of the head portion 201 when mounted on the head portion 201.
For this reason, dust easily accumulates in the concave portion 31, so that the collecting property can be further improved.

According to the present embodiment, embossed portion 20 further protrudes from first convex portion 21a (first concave portion 22a) protruding from the surface of the sheet, and from the top of first convex portion 21a (first concave portion 22a). A second convex portion 21b (second concave portion 22b).
For this reason, since the embossed portion 20 is gradually crushed, the liquid discharge amount is more easily controlled, and the area of the cleaning surface is gradually increased, so that the collecting property can be maintained for a long time.

  It should be noted that the present invention is not limited to the above-described embodiment, and it goes without saying that the specific structure can be appropriately changed.

For example, in the above-described embodiment, the V-shaped non-embossed portion 30 has been described as an example. The shape of the non-embossed portion 30 is not limited to this as long as it has a shape.
For example, as shown in FIGS. 6A and 6B, a U-shaped non-embossed portion 30 having a U-shaped concave portion 31 may be used.
Further, as shown in FIG. 6C, a V-shaped concave portion 31 may be formed in a part of the substantially circular non-embossed portion 30, or as shown in FIG. 6D. Alternatively, a part of the non-embossed portion 30 of the pentagram may function as the concave portion 31.

The shape of the non-embossed portion 30 is most preferably a shape having the concave portion 31 opened to the longitudinal edge portion 201a of the head portion 201 as described above, from the viewpoint of collecting property. As shown in (1), any shape may be used as long as the shape extends in a direction oblique to the longitudinal edge portion 201a of the head portion 201.
With such a shape, since the non-embossed portion 30 is arranged obliquely with respect to the longitudinal edge portion 201a of the head portion 201, it is possible to collect dust.

Further, in the above-described embodiment, the case where cleaning is performed by moving the cleaning sheet 100 in the Y direction has been described as an example, but cleaning is performed by moving the cleaning sheet 100 in a direction parallel to the long side of the cleaning sheet 100. With this in mind, the non-embossed portion 30 may be formed to have a shape that opens from the central portion of the rectangular cleaning sheet 100 toward the short side.
In this case, the cleaning sheet 100 is bent along the short edge of the head portion 201 (the edge along the short direction of the head portion 201), and both ends of the folded sheet are engaged with the upper surface of the head portion 201. Is stopped.

  Next, examples and comparative examples of the present invention will be described. Hereinafter, the present invention will be described specifically with reference to examples, but the present invention is not limited thereto.

<Sample preparation>
(Example 1)
As the outer layer, a nonwoven fabric composed of 100% of hydrophobic fibers and containing 80% of polyethylene terephthalate and 20% of core and sheath fibers of polypropylene and polyethylene as binder fibers was prepared. The polyethylene terephthalate fiber used had a fineness of 3.3 dtex, and the binder fiber used had a fineness of 1.7 dtex.
In addition, two layers of a pulp air-laid nonwoven fabric of 33 gsm and a 100% polypropylene spunbond nonwoven fabric of 17 gsm were prepared as inner layers.
The outer layer and the inner layer were entangled with each other by a hydroentangling method to produce a laminated sheet of a spunlace nonwoven fabric having a four-layer structure.
This laminate sheet is subjected to embossing at a temperature of 105 ° C. and an embossing pressure of 0.6 MPa, and a chemical solution is applied so as to have an impregnation rate of 270%, so that an embossed portion and a non-embossed portion as shown in FIG. The provided rectangular wet sheet was prepared and used as the cleaning sheet of Example 1.
The basis weight of this cleaning sheet was 100 gsm, the long side was 300 mm, and the short side was 200 mm.
In addition, the embossed portion uses a gourd-shaped convex emboss and a concave emboss alternately arranged in the long side direction and the short side direction, and the size of the convex emboss and the concave emboss is 8 mm on the long side and short on the short side. The side was 3 mm, and the height in the protruding direction was 0.8 mm.
The non-embossed portion was V-shaped in a plan view and opened from the center of the cleaning sheet toward the long side. The total length in the long side direction of the non-embossed portion was 45 mm, and the total length in the short side direction was 35 mm. The length of the longest portion of the concave portion of the non-embossed portion in the long side direction was 20 mm.
The distance between adjacent non-embossed portions in the long side direction was 10 mm.

(Comparative Example 1)
Except that the shape of the non-embossed portion was changed, the same laminated sheet as in Example 1 was embossed under the same conditions to produce a wet sheet having an embossed portion and a non-embossed portion. A cleaning sheet was used.
The shape of the non-embossed portion was a square having a length of 10 mm in the long side direction and the short side direction.
The distance between the non-embossed portions adjacent in the long side direction was set so that 10 mm and 20 mm were alternately arranged.

(Comparative Example 2)
A wet sheet was prepared by embossing the entire surface of the same laminated sheet as in Example 1 under the same conditions as in Example 1 and used as a cleaning sheet of Comparative Example 2.

(Comparative Example 3)
A laminated sheet similar to that of Example 1 and not subjected to embossing was produced, and was used as a cleaning sheet of Comparative Example 3.

<Fold evaluation>
When the cleaning sheet of Example 1 and Comparative Example 1 was subjected to fold processing for forming a fold serving as a guide of the bent portion, it was visually checked whether the fold was formed without shifting from the row of the non-embossed portion. And evaluated according to the following criteria. The results are shown in Table I.
◎: no shift ○: almost no shift △: slight shift ×: shift

<Evaluation of wearability>
When the cleaning sheets of Example 1 and Comparative Example 1 were attached to a jig as shown in FIG. 1, it was determined whether the edge of the jig and the row of the non-embossed portions did not shift (edge). The embossed portion and the non-embossed portion are alternately arranged along the bent portion bent along the portion) to visually determine and evaluate according to the following criteria. The results are shown in Table I.
◎: no shift ○: almost no shift △: slight shift ×: shift

<Evaluation of collection performance>
Next, the cleaning sheet of Example 1 and Comparative Examples 1 to 3 was attached to a jig as shown in FIG. 1, and the cleaning sheet was moved in the short direction of the cleaning sheet to perform cleaning. Was carried out to evaluate the dust collecting property.

The cleaning tool used here had a head portion to which the cleaning sheet was attached and a handle portion as shown in FIG.
The head portion is configured by attaching a top surface portion and a bottom surface portion, and the top surface portion is a rectangular shape made of ABS resin (acrylonitrile, butadiene, styrene copolymer synthetic resin) having a long side of 240 mm and a short side of 95 mm. The bottom portion was made of TPE (thermoplastic elastomer) having a hardness of 70 ° and had a rectangular shape with a long side of 248 mm and a short side of 98 mm.
The length of the handle was 215 mm, which was the length from the connection with the head to the tip of the handle cap.

Further, in a state where the cleaning tool is bent along the longitudinal edge of the head portion and the cleaning sheet of Example 1 is attached, the non-embossed portion is 10 mm and the embossed portion is 10 mm on the bent portion. They were alternately arranged at intervals of 〜20 mm.
In the same manner as in the sheet of Example 1, when the cleaning sheet of Comparative Example 1 was attached to the head of the cleaning tool, the non-embossed portion was 10 mm and the embossed portion was 10 to 10 on the bent portion. They were arranged at intervals of 20 mm.
In the cleaning sheet of Comparative Example 2, only the embossed portion was disposed on the bent portion, and in the cleaning sheet of Comparative Example 3, only the non-embossed portion was disposed on the bent portion.

The evaluation criteria are as follows. The results are shown in Table I.
◎: Satisfaction was obtained. ほ ぼ: Some dust and the like remained, but almost satisfaction was obtained. △: Garbage remained and dissatisfaction was obtained. Did not get

<Evaluation of sustained release>
Next, the cleaning sheet of Example 1 and Comparative Examples 1 to 3 was attached to a jig as shown in FIG. 1, and the cleaning sheet was moved in the short direction of the cleaning sheet to perform cleaning. The sustained release of the drug solution at this time was evaluated according to the following criteria. The results are shown in Table I.
◎: The release of the drug solution was sustained, and satisfaction was obtained. ○: The drug solution was released to the extent that there was no problem. △: The release amount of the drug solution was unsatisfactory. ×: The release of the drug solution was not sustained, and the satisfaction was satisfied. Did not get

<Comprehensive evaluation>
Based on the above four evaluations, a comprehensive evaluation was performed according to the following criteria. The results are shown in Table I.
○: There is only ◎ or ○ △: There is even one △ ×: There is even one ×

From the results shown in Table I, it can be seen that the sheet of Example 1 can be easily mounted on a jig and has good dust collecting properties. In addition, it can be seen that the sustained release property of the drug solution is good and a satisfactory feeling can be obtained.
Further, the sheet of Comparative Example 1 has a better dust collecting property at the bent portion than the samples of Comparative Examples 2 and 3, but the entire length of the non-embossed portion in the short side direction is shorter. There is a possibility that a shift may occur at the time of mounting on the bent portion, and a case where the non-embossed portion and the embossed portion are not alternately arranged in the bent portion may occur. Although the sustained release of the drug solution was not a problem, no satisfaction was obtained compared to Example 1.
In addition, it can be seen that, as in the case of the sheet of Comparative Example 2, with the cleaning sheet having only the embossed portion, the collecting property at the bent portion cannot be improved. In addition, the sustained release of the drug solution was unsatisfactory.
In addition, as in the sheet of Comparative Example 3, in the case of the cleaning sheet having only the non-embossed portion, it is understood that the collecting property of the bent portion is not good. This is considered to be due to the poor collecting property of the central portion of the head, which causes dust to collect at the end. In addition, although the retained amount of the drug solution is high, it is released at a stroke in the early stage of use, so that a satisfactory feeling of sustained release cannot be obtained.

REFERENCE SIGNS LIST 100 Cleaning sheet 11 Outer layer 12 Inner layer 20 Embossed part 21 Convex emboss 21a First convex part 21b Second convex part 22 Concave emboss 22a First concave part 22b Second concave part 23 Intermediate part 30 Non-embossed part 31 Concave part S Bent part 200 Cleaning Tool 201 Head 201a Long edge 202 Handle

Claims (4)

In a cleaning sheet to which a chemical solution is attached, which is replaceably attached to a flat cleaning tool,
Forming a cleaning surface covering the bottom surface of the cleaning tool, being bent along a longitudinal edge of the cleaning tool and locked to the upper surface of the cleaning tool;
Non-embossed portions sheet over preparative has a brushed not been compressed in the thickness direction, the longitudinal direction while being arranged in two rows in the cleaning sheet, over the whole body except the non-embossed portion is disposed regions, An embossed part where the sheet is compressed in the thickness direction is arranged,
A row of the non-embossed portions is provided along each of the two rows of bent portions bent along the longitudinal edge,
The cleaning sheet according to claim 1, wherein each of the non-embossed portions has a shape having a concave portion opened to the longitudinal edge of the cleaning tool when the non-embossed portion is attached to the cleaning tool. In a cleaning sheet to which a chemical solution is attached, which is replaceably attached to a flat cleaning tool,
Forming a cleaning surface covering the bottom surface of the cleaning tool, being bent along a longitudinal edge of the cleaning tool and locked to the upper surface of the cleaning tool;
Non-embossed portions sheet over preparative has a brushed not been compressed in the thickness direction, the longitudinal direction while being arranged in two rows in the cleaning sheet, over the whole body except the non-embossed portion is disposed regions, An embossed part where the sheet is compressed in the thickness direction is arranged,
A row of the non-embossed portions is provided along each of the two rows of bent portions bent along the longitudinal edge,
The embossed portion,
A first protrusion protruding from the surface of the sheet;
A second projection further projecting from the top of the first projection;
A cleaning sheet comprising: An outer layer forming a surface of the cleaning sheet,
An inner layer sandwiched between the outer layers and having a liquid retaining property,
The cleaning sheet according to claim 1, further comprising: The embossed portion has a length of 2 mm to 5 mm in the longitudinal direction and 5 mm to 10 mm in the short direction,
The cleaning sheet according to any one of claims 1 to 3, wherein the non-embossed portion has a length of 40 mm to 70 mm in a longitudinal direction and 15 mm to 70 mm in a short direction.

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