JP7404077B2 - cleaning sheet - Google Patents

Description

The present invention relates to a disposable cleaning sheet for wiping off dust and dirt from objects to be cleaned.

Disposable cleaning sheets made of fiber aggregates are known as cleaning tools for cleaning indoor floors, furniture, home appliances, etc.
In recent years, various cleaning sheets have been proposed. For example, Patent Document 1 discloses a sheet-like cleaning tool having a cleaning area that comes into contact with a cleaning target, the cleaning area being a first It has a first area where a fibrous body is arranged and a second area where a second fibrous body is arranged, and each of the first area and the second area is arranged in the longitudinal direction of the cleaning area and the longitudinal direction. Disclosed is a sheet-like cleaning tool, which is arranged in plurality at intervals in an orthogonal direction, and has a color difference ΔE of 49.0 or more between the first fibrous body and the second fibrous body. .
According to the sheet-shaped cleaning tool disclosed in Patent Document 1, it is said that it is possible to distinguish garbage of different hues and to make it easier to understand the collection status thereof.

JP2019-51130A

Generally, such disposable cleaning sheets retain dust and dirt within the fiber aggregate by wiping indoor floors, furniture, household appliances, and other objects to be cleaned, and are used repeatedly for subsequent cleanings. Cleaning sheets that are used repeatedly in this manner have a problem in that it is difficult to know when they are used up, that is, when to replace them with new cleaning sheets.

In Patent Document 1 mentioned above, as a color combination of the first fibrous body and the second fibrous body, a white-based fibrous body and a black-based fibrous body are exemplified, and the white-based fibrous body identifies black garbage. It is said that the black fibrous material can be used to distinguish between white and gray garbage. There was a problem that it was not an indicator for determining when to replace the seat, and it was still difficult to determine when to replace it.

Therefore, an object of the present invention is to provide a disposable cleaning sheet that makes it easy to know when to replace it.

One aspect (aspect 1) of the present invention is a disposable cleaning sheet having a cleaning area that comes into contact with an object to be cleaned,
a first color portion having a color having a brightness within the range of 4.5 to 9.0 according to the Munsell color system;
a second color portion located within the cleaning area and having a color different from the color of the first color portion;
The cleaning sheet is characterized in that it includes:

The cleaning sheet of this embodiment has a color that has a lightness in the range of 4.5 to 9.0 according to the Munsell color system (that is, a color that is close to the actual color that changes color due to dust and dirt when the cleaning sheet is repeatedly used). (hereinafter, such a color may be referred to as "dust color"); and a first color portion located within the area of the cleaning area and having a color different from the color of the first color portion. By including a two-color part, when the cleaning sheet is used repeatedly, the second color part in the cleaning area becomes a dust color (i.e., the same color as the first color part) due to dust and dirt. Due to the discoloration, the entire cleaning area becomes a dusty color, so that the user can easily recognize that it is time to replace the cleaning sheet.

In addition, in the above-mentioned Patent Document 1, as the first fibrous body and the second fibrous body constituting the cleaning sheet, a white-based fibrous body and a black-based fibrous body (ΔL with respect to a white reference plate is 54.0 or more) are used. However, the black tone color of Patent Document 1 is lower in brightness (i.e., blacker) than the actual color that changes color due to dust and dirt when the cleaning sheet is used repeatedly. , which exhibits discrimination between white and gray garbage. Therefore, if the black-based color is used as an indicator for determining when to replace the cleaning sheet, the cleaning sheet will be used until the entire cleaning area changes to the above-mentioned black-based color, and the cleaning sheet will not be replaced. Although the result is too late, as described above, the cleaning sheet of this embodiment allows the user to recognize the time to replace the cleaning sheet at the dust-colored stage before the cleaning area becomes such a black-based color.

In another aspect (aspect 2) of the present invention, in the cleaning sheet of aspect 1, the boundary between the first color portion and the second color portion is non-linear.

In the cleaning sheet of this aspect, since the boundary between the first color part and the second color part is non-linear, when the cleaning sheet is used repeatedly and the second color part in the cleaning area changes color, The boundary between the first color part and the second color part is difficult for the user to recognize, and it is possible to make the user perceive that the dirty area is naturally spreading. As a result, the cleaning sheet of this embodiment allows the user to naturally recognize that the entire cleaning area is dust-colored due to stains caused by dust and dirt (i.e., the cleaning sheet (This makes it possible to naturally recognize when it is time to replace the

In yet another aspect (aspect 3) of the present invention, in the cleaning sheet of aspect 1 or 2, the color of the second color portion has a higher brightness in the Munsell color system than the color of the first color portion. It is characterized by

In the cleaning sheet of this embodiment, since the color of the second color part has a higher brightness than the dust color (the color of the first color part), when the cleaning sheet is used repeatedly, It is possible to more clearly recognize a low brightness color in which the second color portion of the screen has been discolored (i.e., a color when it is soiled with dust or dirt).
Therefore, the cleaning sheet of this aspect allows the user to more accurately and easily recognize when to replace the cleaning sheet.

In yet another aspect (aspect 4) of the present invention, in the cleaning sheet according to any one of aspects 1 to 3 above, the first color portion is located within the area of the cleaning area at least at the peripheral edge of the cleaning area. Part of the cleaning area is located in the center of the cleaning area or in a plurality of locations in the cleaning area.

In the cleaning sheet of this aspect, since the first colored portion is located at a specific location within the cleaning area, the first colored portion also functions as a part of the cleaning area to collect dust and dirt. , the color of the second color portion within the cleaning area can be easily compared with the dust color of the first color portion.

In yet another aspect (aspect 5) of the present invention, in the cleaning sheet according to any one of aspects 1 to 4, the second color portion is located in the center of the cleaning area, and the first color portion is located in the center of the cleaning area. , located at the peripheral edge of the cleaning area so as to sandwich at least the second color part.

In the cleaning sheet of this aspect, the second colored part is located in the center part of the cleaning area where dirt due to dust and dirt is most likely to adhere, and the first colored part is located in the cleaning area so that at least the second colored part is sandwiched. Since the color of the second color portion within the cleaning area can be more easily and accurately compared with the dust color of the first color portion.

In yet another aspect (aspect 6) of the present invention, in the cleaning sheet according to any one of aspects 1 to 5, the cleaning sheet further has a non-cleaning area that does not come into contact with the object to be cleaned, and The colored portion is located within the non-cleaning area.

In the cleaning sheet of this aspect, since the first color portion is located within the non-cleaning area, when the cleaning sheet is used, dirt due to dust and dirt is difficult to adhere to the first color portion, and cleaning This makes it easier to maintain the dust color of the first color section, which is an indicator of when to replace the sheet.
Therefore, the cleaning sheet of this aspect allows the user to more accurately and easily recognize when to replace the cleaning sheet.
In addition, if the first color part is located only within the non-cleaning area, the second color part can be formed wider, such as by forming the entire cleaning area with the second color part, so cleaning There is also an advantage that the number of times the cleaning sheet can be used can be increased, and the cleaning sheet can be used for a longer period of time.

In yet another aspect (aspect 7) of the present invention, in the cleaning sheet according to any one of aspects 1 to 6, the cleaning sheet is arranged such that the first Each of the color portion and the second color portion is visually recognizable.

The cleaning sheet of this aspect is configured so that each of the first color part and the second color part can be visually recognized when viewed from above, so that the user can check the color of the second color part and the second color part while cleaning. It is possible to compare the dust color of one color part, and it is possible to recognize the time to replace the cleaning sheet more quickly and easily.

In yet another aspect (aspect 8) of the present invention, in the cleaning sheet according to any one of aspects 1 to 7, the cleaning sheet is arranged such that the first Each of the color portion and the second color portion is visually recognizable.

In the cleaning sheet of this aspect, when the user looks at the lower side (cleaning area side) of the cleaning sheet after cleaning, both the first color part and the second color part can be visually recognized at the same time. You can more easily compare both colors.

The cleaning sheet of the present invention allows a user to easily recognize when to replace the cleaning sheet.

FIG. 1 is a perspective view of a cleaning sheet 1 according to a first embodiment of the present invention. FIG. 2 is a plan view of the cleaning sheet 1 viewed in the thickness direction T from the lower side _T2 where the cleaning area _AC is located. FIG. 3 is a perspective view for explaining how the cleaning sheet 1 is used. FIG. 4 is a plan view corresponding to FIG. 2, showing the state after the cleaning sheet 1 has been repeatedly used. FIG. 5 is a plan view corresponding to FIG. 2 of a cleaning sheet 1A according to a second embodiment of the present invention. FIG. 6 is a plan view corresponding to FIG. 2 of a cleaning sheet 1B according to a third embodiment of the present invention. FIG. 7 is a plan view corresponding to FIG. 2 of a cleaning sheet 1C according to a fourth embodiment of the present invention. FIG. 8 is a plan view of a cleaning sheet 1D according to the fifth embodiment of the present invention, viewed in the thickness direction T from the upper side _T1 where the non-cleaning area _AN is located.

Hereinafter, preferred embodiments of the cleaning sheet of the present invention will be described in detail with reference to the drawings.

In this specification, in the thickness direction of the cleaning sheet, the side that is relatively proximal to the cleaning area that comes into contact with the object to be cleaned when the cleaning sheet is used is referred to as the lower side, and the opposite side ( That is, the distal side relative to the cleaning area) is referred to as the upper side. Note that these terms "upper side" and "lower side" are used for convenience. For example, if both sides of the cleaning sheet can be used as the cleaning area (i.e., a double-sided cleaning sheet), the cleaning sheet When using the cleaner, the side that comes into contact with the object to be cleaned (the contact side) is the lower side, and the opposite side is the upper side.
In addition, in this specification, the width direction length of the cleaning sheet extends in the longitudinal direction of the cleaning sheet so as to include the width direction center line extending in the longitudinal direction of the cleaning sheet in a plan view, and the width direction length of the cleaning sheet An area having a length in the width direction of ⅓ of the total length is referred to as the center part of the cleaning sheet or the center part of the cleaning area.

<First embodiment>
The disposable cleaning sheet 1 according to the first embodiment of the present invention retains dust and dirt on the surface of the cleaning object in the fiber aggregate 2 described later by wiping the object to be cleaned, such as indoor floors, furniture, and home appliances. It is a sheet-like fibrous structure that has the function of cleaning the surface to be cleaned.

As shown in FIGS. 1 and 2, the cleaning sheet 1 has a substantially rectangular outer shape having a longitudinal direction L and a width direction W in plan view.
In addition, in the present invention, the external shape of the cleaning sheet is not limited to such an embodiment, but any external shape according to various uses and modes of use (for example, (elliptical, circular, square, hexagonal, gourd-shaped, etc.) can be adopted.

In addition, as shown in FIGS. 1 and 2, the cleaning sheet 1 of the first embodiment described above has an area located on the lower side _T2 of the cleaning sheet 1 in the thickness direction T, and is an area to be cleaned. The fiber aggregate 2 forms the cleaning area A _C that comes into contact with the cleaning sheet 1, and the base sheet forms the non-cleaning area A _N that is located on the upper side T1 of the cleaning sheet ₁ and does not come into contact with the object to be cleaned. 3, and a top sheet 4 that is located on the upper side _T1 of the base sheet 3 and forms, together with the base sheet 3, an insertion portion 41 of a holder 8, which will be described later.

The fiber aggregate 2, the base sheet 3, and the top sheet 4 that constitute the cleaning sheet 1 are laminated in this order in the thickness direction T, and form a linear joint along the widthwise center line extending in the longitudinal direction L. 5 is integrally joined.
In addition to the linear joint 5, the cleaning sheet 1 has at least the top sheet 4 and the base sheet 3 as shown in FIG. ) It has two pairs of L-shaped joint parts 51 which are joined to form an insertion part 41 of the holder 8 which will be described later.

Furthermore, in this cleaning sheet 1, as shown in FIGS. 1 and 2, the fiber assembly 2 includes a plurality of fiber bundles 23 having a dust color, which will be described later, and an arbitrary color other than the dust color (i.e., a dust color). A plurality of fiber bundles 21 having a different color (hereinafter, such a color may be referred to as a "non-dust color") and a plurality of fiber bundles 21 located on the lower side _T2 relative to these fiber bundles. It is composed of a plurality of strip sheets 22.

The plurality of strip sheets 22 are formed by a plurality of strips lined up in the longitudinal direction L, each of which is cut in a zigzag shape from both edges in the width direction W of a sheet of nonwoven fabric toward the center in the width direction W. The above-mentioned fiber aggregate 2 is made of the nonwoven fabric in which the plurality of strips (i.e., the plurality of strip sheets 22) are formed, the plurality of fiber bundles 21 having a non-dust color, and the plurality of fiber bundles 21 having a dust color. A fiber bundle 23, a plurality of fiber bundles 21 having a non-dust color, and a plurality of fiber bundles 23 having a dust color are stacked on top of each other in this order in the thickness direction T (i.e., the strip sheet 22/non-dust color). A layered structure of a plurality of fiber bundles 21 having a dust color/a plurality of fiber bundles 23 having a dust color/a plurality of fiber bundles 21 having a non-dust color/a plurality of fiber bundles 23 having a dust color is formed), which will be described later. After joining in the thickness direction T by the linear joining part 5 and the L-shaped joining part 51, the obtained fiber laminate is spread using any fiber opening means (for example, artificial means, air blowing means, etc.). It is formed by raising the hair three-dimensionally.
In addition, on the opposite side of the strip sheet 22 of this fiber aggregate 2, the base sheet 3 and the top sheet 4 are arranged during the above-mentioned lamination, and a linear joint 5 and an L-shaped joint are formed. 51, it is integrally joined with each of the above-mentioned fiber bundles and strip sheets.

The fiber bundle 23 having a dusty color is a fiber collection in which a plurality of fibers (preferably long fibers) having a dusty color have a brightness in the range of 4.5 to 9.0 according to the Munsell color system. It is generally made of a collection of fibers called tow, except that it has this dusty color. Note that a tow is a long fiber bundle made up of a large number of filaments, is not twisted, and is an aggregate of fibers formed by collecting a large number of spun yarns and cutting them into a predetermined length.

The fiber bundle 23 having such a dusty color constitutes the first colored portion 6 of the cleaning sheet 1, as will be described later.

The fibers constituting the dust-colored fiber bundle 23 are not particularly limited as long as they have a dust-color. For example, synthetic fibers colored dust-colored with dyes, pigments, etc. can be used. For example, synthetic fibers made by dispersing dyes, pigments, etc. that exhibit a dusty color in a synthetic resin and spinning them, or synthetic fibers that have dyes, pigments, etc. that exhibit a dusty color attached to their surfaces, etc. can be used.

Further, as the synthetic fibers, for example, fibers made of synthetic resins such as polyethylene, polypropylene, nylon, polyester (e.g., polyethylene terephthalate, etc.), and rayon can be used, and such synthetic fibers have heat-fusible properties. Preferably.

Furthermore, the synthetic fiber may be a fiber having a single fibrous structure, or may be a conjugate fiber such as a core-sheath type conjugate fiber or a side-by-side type conjugate fiber having a core and a sheath. . Examples of core-sheath type conjugate fibers include conjugate fibers in which the core is made of polyethylene terephthalate and the sheath part is polyethylene or polypropylene, and conjugate fibers in which the core is made of polypropylene and the sheath part is polyethylene.
In addition, when using these core-sheath type composite fibers, if the fiber exhibits a dust color, even if the resin in the core is colored dusty with dyes or pigments, the resin in the sheath will be dyed. The resin in both the core and sheath portions may be colored in a dusty color with a dye, pigment, or the like.

Note that the fineness of the fibers constituting the dust-colored fiber bundle 23 is not particularly limited, and may be, for example, within the range of 1 to 50 dtex, preferably within the range of 2 to 10 dtex.

Further, the fibers constituting the dust-colored fiber bundle 23 may be crimped by mechanical treatment or thermal treatment.

On the other hand, the fiber bundle 21 having a non-dust color can be the same fiber bundle as the above-described fiber bundle 23 having a dust color, except that it has a color different from the dust color. Therefore, the fibers constituting the fiber bundle 21 having a non-dust color are not particularly limited as long as they have a non-dust color, and include, for example, synthetic fibers colored in a non-dust color with dyes, pigments, etc. Synthetic fibers are synthetic fibers made by dispersing dyes, pigments, etc. that give a non-dust color into synthetic resin, synthetic fibers that have dyes, pigments, etc. that give a non-dust color attached to the surface, and synthetic fibers that are made of dyes, pigments, etc. that give a non-dust color. Uncolored synthetic fibers or the like can be used. Note that the synthetic resin is the same as the fibers constituting the dust-colored fiber bundle 23.

The fiber bundle 21 having such a non-dust color constitutes the second colored portion 7 of the cleaning sheet 1 together with the strip sheet 22, as will be described later.

Further, these fiber bundles, that is, the dust-colored fiber bundle 23 and the non-dust-colored fiber bundle 21, may be treated with a dust-absorbing treatment agent such as liquid paraffin, and may be treated with antistatic treatment or hydrophilic treatment. Any processing such as processing may be performed.

As described above, the plurality of strip sheets 22 are formed by a plurality of strips lined up in the longitudinal direction L, which are cut in a zigzag shape from both edges in the width direction W of one nonwoven fabric toward the center in the width direction W, respectively. It is formed. The nonwoven fabric constituting the strip sheet 22 is not particularly limited, and is designed to have a certain flexibility that can be deformed to follow the surface shape of the object to be cleaned, and a certain rigidity that is difficult to break when wiping off dust and dirt. Any nonwoven fabric can be used, and for example, air-through nonwoven fabric, spunbond nonwoven fabric, point bonded nonwoven fabric, spunlace nonwoven fabric, etc. can be used. Such a nonwoven fabric preferably contains heat-fusible fibers such as the above-mentioned core-sheath type composite fibers.

Note that the shape of the strip sheet 22 is not particularly limited, and any shape that takes into account the ability to trap dust and dirt (for example, in addition to the above-mentioned zigzag shape, a straight shape, a curved shape, etc.) can be adopted. .

Further, in the cleaning sheet 1 described above, the strip sheet 22 has a color different from the dust color (non-dust color), and as described later, the strip sheet 22 is included in the cleaning sheet 1 together with the fiber bundle 21 having a non-dust color. This constitutes the second color section 7.
Note that the strip sheet 22 may have the same type of non-dust color as the fiber bundle 21 having the above-mentioned non-dust color, or may have a different type of non-dust color.

The strip sheet 22 having a non-dust color is not particularly limited as long as it has a non-dust color, but for example, it may be a non-dust color similar to the fibers constituting the fiber bundle 21 having a non-dust color. Non-woven fabrics formed using colored synthetic fibers or uncolored synthetic fibers; non-woven fabrics formed by adhering dyes, pigments, etc. that exhibit a non-dust color to the surface, etc. can be used.

In addition, in the cleaning sheet of the present invention, it is not an essential component that the cleaning sheet includes the various fiber bundles, strip sheets, or fiber aggregates including these as described above. In cases where it is composed only of fiber sheets such as nonwoven fabrics, woven fabrics, and knitted fabrics (including those consisting of a plurality of fiber sheet pieces obtained by cutting a fiber sheet into strips), the first color portion and the first color portion described below As long as it has two-color parts, it is not necessary to provide the various fiber bundles, strip sheets, and fiber aggregates containing these as described above.

Further, in the cleaning sheet 1 according to the first embodiment described above, the base sheet 3 forming the non-cleaning area _AN has the same rectangular outer shape as the cleaning sheet 1 in plan view. .
In addition, in the present invention, the external shape of the base sheet is not limited to such an embodiment, and may have any external shape according to various uses and modes of use, as long as it can be used as a base material sheet of a cleaning sheet. Any shape (eg, oval, circular, square, hexagonal, gourd shape, etc.) can be employed.

In addition, in the above-mentioned cleaning sheet 1, the base sheet 3 is formed of a non-woven fabric similarly to the strip sheet 22, and the non-woven fabric extends from both edges in the width direction W toward the center in the width direction W. It has a plurality of strips arranged in the longitudinal direction L and cut in a zigzag shape. Note that since having such strips is not an essential component, the base sheet 3 may be formed of one or more nonwoven fabrics without such cuts.

The nonwoven fabric that forms the base sheet 3 is not particularly limited, and should have a predetermined flexibility that can be deformed to follow the surface shape of the object to be cleaned, and a predetermined rigidity that is difficult to break when wiping off dust and dirt. Any nonwoven fabric can be used, and for example, the same nonwoven fabric as the strip sheet 22 described above can be used. Preferably, such nonwoven fabric also contains heat-fusible fibers such as the above-mentioned core-sheath type composite fibers.

Note that the base sheet 3 does not need to be formed of a nonwoven fabric, and may be formed of, for example, a net-like sheet, a film, paper, or a composite sheet formed by combining these.

Further, in the cleaning sheet 1 described above, the top sheet 4 that forms the insertion portion 41 of the holder 8 together with the base sheet 3 has a rectangular outer shape that is smaller in size than the base sheet 3 in plan view. are doing.
In addition, in the present invention, the outer shape of the top sheet is not limited to such an embodiment, but any shape that has a smaller size than the above-mentioned base sheet and can be used as the top sheet of the cleaning sheet can be used. Any external shape (for example, ellipse, circle, square, hexagon, gourd shape, etc.) can be adopted in consideration of ease of insertion of the holder.

Further, in the cleaning sheet 1 described above, the top sheet 4 is formed of the same nonwoven fabric as the strip sheet 22 and the base sheet 3. The nonwoven fabric forming the top sheet 4 is not particularly limited, and has a predetermined flexibility that can be deformed to follow the shape of the tip of the holder 8 when the holder 8 is inserted, and a material that allows the holder 8 to be inserted into the insertion portion 41. Any nonwoven fabric can be used that takes into account a certain rigidity that prevents breakage when wiping the object to be cleaned while being inserted into the nonwoven fabric. For example, the same nonwoven fabric as the strip sheet 22 and the base sheet 3 can be used. Can be done. Preferably, such a nonwoven fabric also contains heat-fusible fibers such as the above-mentioned core-sheath type composite fibers.

Note that the top sheet 4 does not need to be formed of a nonwoven fabric, and may be formed of, for example, a net-like sheet, a film, paper, or a composite sheet formed by combining these.

In the first place, it is not an essential component for the cleaning sheet of the present invention to include the base sheet and top sheet as described above, so depending on the form of the cleaning sheet, such a base sheet and top sheet may be required. You don't have to be prepared.

In the cleaning sheet 1 described above, the fiber aggregate 2, the base sheet 3, and the top sheet 4 are laminated in this order in the thickness direction T, and the width direction center extending in the longitudinal direction L as shown in FIG. They are integrally joined by a straight joining part 5 along the line.
Furthermore, as shown in FIG. 1, the cleaning sheet 1 has two pairs arranged symmetrically with respect to a widthwise centerline extending in the longitudinal direction L on both end sides of the top sheet 4 in the longitudinal direction L. At least the top sheet 4 and the base sheet 3 (in some cases, also a part of the fiber aggregate 2) are integrally joined by the L-shaped joints 51 (four in total), thereby forming a holder to be described later. Eight insertion portions 41 are formed.

The means for forming these linear joints 5 and L-shaped joints 51 is a thermal fusion method such as a heat sealing method or an ultrasonic sealing method, but is not limited thereto, and hot melt adhesives or the like can be used. An adhesion method may also be used. Furthermore, the shape of these joints is not particularly limited, and may be formed in one or more linear shapes, such as a straight line, a curved line, a wavy line, a zigzag line, a broken line, a dotted line, etc. However, it may be formed in one or more geometric shapes such as a circle, an oval, a square, or a star.
Moreover, like the cleaning sheet 1 shown in FIG. If not, the length of the fiber aggregate (the length of the free end on the tip side from the joint) will not be uniform, so the boundary between the first color part 6 and the second color part 7 will be non-straight. It becomes easy to become like.

The above-mentioned cleaning sheet 1 has a grip portion that is held by the user's hand, and a grip portion that is located on the opposite side of the grip portion and is inserted into the insertion portion 41 of the cleaning sheet 1 to hold the cleaning sheet 1. As shown in FIG. 3, the tip of the holder 8 was inserted into the insertion part 41 of the cleaning sheet 1 using a holder 8 made of resin (for example, made of polypropylene) having a tip. It is used for wiping and cleaning surfaces to be cleaned. Note that the type of holder 8 is not particularly limited, and may be a handy type as shown in FIG. 3 or a type for flooring.

As shown in FIGS. 1 and 2, the cleaning sheet 1 of the first embodiment configured as described above is composed of the fiber bundles 23 having the above-mentioned dust color, and has a brightness of 4 according to the Munsell color system. A first color section 6 having a color in the range _of . a second color portion 7 located within the area and having a color different from the color of the first color portion 6 (that is, a non-dust color);

The cleaning sheet 1 has a first color portion 6 having such a dust color, and a second color portion 7 located within the cleaning area _AC and having a color different from the color of the first color portion 6. When the cleaning sheet 1 is used repeatedly, the second color portion 7 in the cleaning area _AC becomes dust colored (i.e., the first color) due to dirt such as dust and dirt. As shown in FIG. 4, the entire cleaning area _AC becomes a dusty color, so that the user can easily recognize that it is time to replace the cleaning sheet 1.

Note that the color of the first color portion 6 is not particularly limited as long as the brightness according to the Munsell color system is within the range of 4.5 to 9.0 (i.e., dust color), but the cleaning sheet may be repeatedly used. The brightness according to the Munsell color system is preferably within the range of 5.0 to 8.0, more preferably 6.0, since it is closer to the actual color that changes color due to dirt such as dust and dirt when In addition to this brightness range, it is more preferable to use a color whose saturation in the Munsell color system is within the range of 0 to 2.0. A color with a saturation of 0 to 1.5 is more preferable, and a color with a saturation of 0, that is, an achromatic color is particularly preferable. In addition, achromatic colors with brightness in the range of 4.5 to 9.0 according to the Munsell color system are given Munsell values of N4.5 to N9.0 ("N" represents an achromatic color, and The numerical value "4.5 to 9.0" represents the brightness), resulting in a white-gray color.

The brightness and saturation in the Munsell color system can be measured by the visual colorimetry method, in which the color is visually determined by comparing it with a color sample. Specifically, for example, using the expanded version of the Munsell system color ruler published by Nippon Shikken Business Co., Ltd., visually draw the Munsell symbol (color sample) on a numerical scale at equal intervals and the object to be measured (for example, a cleaning sheet). , fiber aggregates (including fiber bundles, strip sheets), base sheets, etc.) can be visually determined by comparing the colors (hue, brightness, and saturation).

Further, in the cleaning sheet 1 described above, as shown in FIG. 2, the boundary between the first color portion 6 and the second color portion 7 is formed in a non-linear shape.
If the boundary between the first color part 6 and the second color part 7 is formed in a non-linear shape in this way, the cleaning sheet 1 will be used repeatedly, and the second color part 7 in the cleaning area _AC will change color. When cleaning, the boundary between the first color section 6 and the second color section 7 is difficult for the user to recognize, and the user can perceive that the dirty area is naturally spreading. To make the user naturally recognize that the entire cleaning area _AC is dust-colored due to dirt and dust, that is, to make the user naturally recognize that it is time to replace the cleaning sheet 1. Can be done.

In the cleaning sheet 1, the above-mentioned fiber aggregate 2 includes a nonwoven fabric in which a plurality of strips (that is, a plurality of strip sheets 22) are formed, a plurality of fiber bundles 21 having a non-dust color, and a dust A plurality of fiber bundles 23 having a color, a plurality of fiber bundles 21 having a non-dust color, and a plurality of fiber bundles 23 having a dust color are laminated in this order in the thickness direction T to form the laminate. The boundary between the first color portion 6 and the second color portion 7 described above is formed in a non-linear shape by being formed by three-dimensionally raising the fibers using an arbitrary fiber opening means.
In the present invention, the means for forming the boundary between the first color part and the second color part in a non-linear manner is not limited to such a means, and includes, for example, non-dust colored (including uncolored) fiber bundles and strips. After forming a fiber aggregate using a sheet, a part of the fiber aggregate may be colored a dust color so that the boundary between the first color part and the second color part becomes non-linear.

In addition, in this specification, "non-linear" simply means not linear, and for example, even if it is an irregular shape that is not linear like the above-mentioned cleaning sheet 1, it may be curved, zigzag, etc. It may be linear or the like.

Further, in the cleaning sheet of the present invention, the color of the second color portion is not particularly limited as long as it is a different color (non-dust color) from the color of the first color portion (dust color); It is preferable that the color has a brightness higher in the Munsell color system than the color of the first color part.
If the color of the second color area has a higher brightness than the color of the first color area (dust color), the second color area within the cleaning area will change color when the cleaning sheet is used repeatedly. Since it is possible to more clearly recognize colors with low brightness (that is, colors when the cleaning sheet is soiled with dust and dirt), the user can more accurately and easily recognize when it is time to replace the cleaning sheet.

Further, in the cleaning sheet 1 described above, the first colored portions 6 are arranged to extend in the longitudinal direction L at both ends of the cleaning area _AC in the width direction W, as shown in FIG. Further, as shown in FIG. 2, the second color portion 7 is sandwiched between the first color portions 6 located at both ends of the cleaning area AC in the width direction _{W at the center of the cleaning area AC .} It is located.

In the cleaning sheet of the present invention, the arrangement position of the first colored part is not limited to such a position, but the first colored part is located within the cleaning area at least in a part of the peripheral edge of the cleaning area. It is preferable that you do so.
When the first color part is in such a position, the first color part also functions as a part of the cleaning area that collects dust and dirt, and the color of the second color part in the cleaning area is changed to the first color. It can be easily compared with the dust color of the other parts.

Furthermore, in the cleaning sheet of the present invention, as in the first embodiment described above, the second color portion is located at the center of the cleaning area, and the first color portion at least sandwiches the second color portion. Preferably, it is located at the periphery of the area.
When the first color part and the second color part are located in such a position, the second color part is located in the central part of the cleaning area where dirt and dirt are most likely to adhere, and the first color part is By being located at the periphery of the cleaning area so as to at least sandwich the second color area, the color of the second color area within the cleaning area can be more easily and accurately compared with the dust color of the first color area. Can be done.

The means for arranging the first color portion and the second color portion at such positions is not particularly limited, but for example, a plurality of fiber bundles having the above-mentioned dust color and a plurality of fiber bundles having a non-dust color may be stacked. When forming a fiber aggregate, the plurality of fiber bundles having a non-dust color are located on the lowermost side (i.e., the cleaning area side), and the plurality of fiber bundles having a dust color are located on the uppermost side (i.e., on the cleaning area side). By stacking each fiber bundle so that the fiber bundles are located on the base sheet side), when the stacked fiber laminate is raised three-dimensionally, a non-dust color appears in the center of the cleaning area. A two-color portion can be formed, and a dust color can appear at both widthwise ends of the cleaning area (a part of the peripheral edge of the cleaning area) to form a first color portion.

Note that even if the first color portion is arranged so as to sandwich the second color portion from both sides in the width direction as in the first embodiment described above, the first color portion may be arranged so as to sandwich the second color portion from both sides in the longitudinal direction. Alternatively, they may be arranged so as to sandwich the second color portion from both sides in the longitudinal direction and the width direction, that is, to surround the second color portion.

Furthermore, as shown in FIG. 2, in the cleaning sheet 1 described above, each of the first colored portion 6 and the second colored portion 7 is visible in a plan view viewed from the lower side _T2 in the thickness direction T. It has become.
If each of the first colored part 6 and the second colored part 7 is configured to be visible from the lower side _T2 of the cleaning sheet 1, the user can check the lower part of the cleaning sheet 1 after cleaning. When looking at the side _T2 (cleaning area _AC side), both the first color portion 6 and the second color portion 7 can be viewed at the same time, making it easier to compare the colors of the two. .

In addition, in the cleaning sheet of the present invention, each of the first color part and the second color part may be visible when viewed from either the upper side or the lower side in the thickness direction, or Each of the first color portion and the second color portion may be visible only from either the upper side or the lower side in the horizontal direction.

Further, in the cleaning sheet of the present invention, the arrangement of the first color portion and the second color portion is not limited to the manner of the first embodiment described above as long as the effects of the present invention can be achieved.
Refer to the drawings below for other embodiments of the present invention (i.e., second to fifth embodiments) in which the arrangement of the first color portion and the second color portion is different from the first embodiment described above. I will explain while doing so. Note that the configuration other than the configuration that differs from the above-described first embodiment is basically the same as the first embodiment, and therefore the description thereof will be omitted.

<Second embodiment>
As shown in FIG. 5, in the cleaning sheet 1A according to the second embodiment of the present invention, the fiber aggregate 2A forming the cleaning area _AC that comes into contact with the object to be cleaned is composed of a plurality of fibers having a non-dust color. It is composed of a bundle 21 and a plurality of dust-colored strip sheets 22A located on the lower side T2 relative to the fiber bundle ₂₁ .

Note that the plurality of dust-colored strip sheets 22A are arranged in a zigzag shape from both edges in the width direction W of one sheet of dust-colored nonwoven fabric toward the center in the width direction W, as in the above-described first embodiment. It is formed by a plurality of strips lined up in the longitudinal direction L and cut into.

The fiber assembly 2A is made by overlapping in the thickness direction T a nonwoven fabric in which a plurality of strips (i.e., a plurality of strip sheets 22A) having a dust color are formed and a plurality of fiber bundles 21 having a non-dust color. The fiber laminate is laminated and joined in the thickness direction T by the above-mentioned joint (not shown), and then the obtained fiber laminate is three-dimensionally raised using an arbitrary fiber opening means.
In addition, in this fiber assembly 2A, similarly to the above-described first embodiment, the base sheet 3 and the top sheet are placed on the opposite side of the fiber assembly 2A from the strip sheet 22A during the above-mentioned lamination. (not shown) are arranged and are integrally joined together with the fiber bundle 21 and the strip sheet 22A by the above-mentioned joint (not shown).

As shown in FIG. 5, in the fiber assembly 2A, a plurality of strip sheets 22A having a dust color are formed in the central part of the cleaning area _AC when the above-mentioned fiber laminate is three-dimensionally raised. A first color portion 6A having a dust color is formed by being located near the center of the cleaning area AC, and the other part of the cleaning area _AC (i.e., the width of the cleaning area _AC) is formed _. At both ends in the direction W), a second color portion 7 having a non-dust color is formed, which appears due to the position of the fiber bundle 21 having a non-dust color.
That is, in the cleaning sheet 1A of the second embodiment, the first color portion 6A is formed by the plurality of strip sheets 22A having a dust color, and the second color portion 7 is formed by the fiber bundle 21 having a non-dust color. Further, the first color portion 6A is located at the center of the cleaning area _AC of the cleaning sheet 1A.

In this way, when the first color portion 6A is located in the center of the cleaning area _AC within the area of the cleaning area _AC , the first color portion 6A also collects dust and dirt in the cleaning area A. The color of _{the second color portion 7 in the cleaning area AC can} be easily compared with the dust color of the first color portion 6A.

Furthermore, in the cleaning sheet 1A of the second embodiment, as shown in FIG. ₅ , the first color portion 6A and the second color portion 7 are are visible, so when the user looks at the lower side _T2 (cleaning area _AC side) of the cleaning sheet 1A after cleaning, the first color portion 6A and the second color portion 7 Since both can be viewed simultaneously, the colors of the two can be more easily compared.

Note that the dust-colored strip sheet 22A may be the same as the strip sheet 22 of the first embodiment described above, except that it has a dust color. A nonwoven fabric formed using synthetic fibers colored in the same dusty color as the fibers constituting the colored fiber bundle 23, or a nonwoven fabric formed by adhering dyes, pigments, etc. that exhibit a dusty color to the surface, etc. may be used. Can be done.

<Third embodiment>
As shown in FIG. 6, in the cleaning sheet 1B according to the third embodiment of the present invention, the fiber aggregate 2B forming the cleaning area _AC that comes into contact with the object to be cleaned is similar to that in the first embodiment described above. , a plurality of fiber bundles 23B having a dust color, a plurality of fiber bundles 21 having a non-dust color, and a plurality of fiber bundles 21 having a non-dust color located on the lower side _T2 relative to these fiber bundles. It is composed of a strip sheet 22.
That is, in the cleaning sheet 1B of the third embodiment, as in the first embodiment described above, the first color portion 6B is formed by a plurality of fiber bundles 23B having a dust color, and the first color portion 6B is formed by a plurality of fiber bundles 23B having a non-dust color. The second color portion 7 is formed by the fiber bundle 21 and the strip sheet 22.

However _, in the cleaning sheet 1B of the third embodiment, as shown in _FIG . are arranged in an irregularly distributed manner.
In this way, if the first color portion 6B is located at multiple locations in the cleaning area _AC within the area of the cleaning area _AC , the first color portion 6B is also a cleaning area that collects dust and dirt. While functioning as a part of the cleaning area _AC , the color of the second color part 7 in the cleaning area _AC can be easily compared with the dust color of the first color part 6B.

Furthermore, in the cleaning sheet 1B of the third embodiment, as shown in FIG. ₆ , the first color portion 6B and the second color portion 7 are are visible, so when the user looks at the lower side _T2 (cleaning area _AC side) of the cleaning sheet 1B after cleaning, the first color portion 6B and the second color portion 7 Since both can be viewed simultaneously, the colors of the two can be more easily compared.

Note that the means for arranging the first colored portions 6B at a plurality of locations in the cleaning area _AC is not particularly limited, and for example, a fiber aggregate of the dust-colored fiber bundles 23B forming the first colored portions 6B may be used. The arrangement position and number of arrangement within 2B may be adjusted as appropriate.

Furthermore, the first color portions 6B may be arranged irregularly at multiple locations within _the cleaning area _AC as shown in FIG. It may be placed in

<Fourth embodiment>
As shown in FIG. 7, a cleaning sheet 1C according to the fourth embodiment of the present invention has a fiber aggregate 2C that forms a cleaning area _AC and has a non-dust color (more specifically, a non-dust color). a plurality of fiber bundles 21 and strip sheets 22), a base sheet 3C forming a non-cleaning area _AN and having a dust color, and a top sheet (not shown) located on the upper side _T1 of the base sheet 3C. ) and is composed of.
That is, in the cleaning sheet 1C of the fourth embodiment, the first color portion 6C is formed by the base sheet 3C having a dust color, and the fiber aggregate 2C having a non-dust color (i.e., a plurality of fiber aggregates having a non-dust color). The second color portion 7 is formed by the fiber bundle 21 and the strip sheet 22).

If the first color portion 6C is located within the non-cleaning area _AN as in this cleaning sheet 1C, dirt due to dust and dirt will be deposited on the first color portion 6C when the cleaning sheet 1C is used. It is possible to easily maintain the dust color of the first colored portion 6C, which is difficult to adhere to and serves as an indicator of when to replace the cleaning sheet 1C, so that the user can more accurately and easily recognize when it is time to replace the cleaning sheet 1C. can do.
Further, when the first color portion 6C is located only within the non-cleaning area _AN as in this cleaning sheet 1C, the entire cleaning area _AC may be formed by the second color portion 7. Since the second color portion 7 can be formed wider, the number of times the cleaning sheet 1C can be used can be increased, and the cleaning sheet 1C can be used for a longer period of time. There is also.

Furthermore, in the cleaning sheet 1C of the fourth embodiment, as shown in FIG. ₇ , the first color portion 6C and the second color portion 7 are are visible, so when the user looks at the lower side _T2 (cleaning area _AC side) of the cleaning sheet 1C after cleaning, the first color portion 6C and the second color portion 7 Since both can be viewed simultaneously, the colors of the two can be more easily compared.

In addition, as the base material sheet 3C having a dust color, the same material as the base material sheet 3 of the above-described first embodiment can be used, except that it has a dust color. For example, the base material sheet 3C of the above-described first embodiment can be used. Non-woven fabric or net-like sheet formed using synthetic fibers colored in the same dust color as the fibers constituting the fiber bundle 23 having a dust color; made by adhering dyes, pigments, etc. that exhibit a dust color to the surface. Nonwoven fabrics and films; films formed by dispersing dust-colored dyes, pigments, etc. in synthetic resin; or composite sheets formed by combining these can be used.

In addition, in the cleaning sheet of the present invention, similarly to the base sheet, the top sheet forming the non-cleaning area of the cleaning sheet may have a dust color. In that case, only the top sheet may have a dust color, or both the top sheet and the base sheet may have a dust color.

<Fifth embodiment>
As shown in FIG. 8, the cleaning sheet 1D according to the fifth embodiment of the present invention has a first color portion 6D and a second color portion 7 when viewed from above _T1 in the thickness direction T. are made to be visible through the base sheet 3, that is, each of the first color portion 6D and the second color portion 7 is visible when viewed from the upper side _T1 of the cleaning sheet 1. ing.
If each of the first color part 6D and the second color part 7 is configured to be visible from the upper side _T1 of the cleaning sheet 1D, the user can clean the second color part 6D and the second color part 7 while cleaning. 7 can be compared with the dust color of the first color portion 6D, and the time to replace the cleaning sheet 1 can be recognized earlier and more easily.

In addition, in the above-mentioned cleaning sheet 1D, the first color portion and the second color portion are visible even when the base sheet is turned over after cleaning.

In the present invention, the means for making each of the first color part and the second color part visible when viewed from above the cleaning sheet is not particularly limited. For example, each of the first color part and the second color part A part of the base sheet may be configured to protrude out of the plane from the longitudinal and/or widthwise edges of the base sheet.

In addition, in the cleaning sheet 1D of the fifth embodiment, each of the first color portion 6D and the second color portion 7 is visible even when viewed from the lower side _T2 in the thickness direction T. Therefore, when the user looks at the lower side T ₂ (cleaning area _AC side) of the cleaning sheet 1D after cleaning, both the first color portion 6D and the second color portion 7 can be visually recognized at the same time. Therefore, the colors of the two can be more easily compared.

Further, the type of cleaning sheet to which the present invention is applied is not particularly limited, and the present invention can be applied to any known cleaning sheet, for example, a single-sided type like the above-mentioned embodiments. It may be a cleaning sheet or a double-sided cleaning sheet.

Further, the cleaning sheet of the present invention is not limited to the above-described embodiments, and can be appropriately combined, substituted, and changed within the scope of the purpose and gist of the present invention. In addition, in this specification, ordinal numbers such as "first" and "second" are used to distinguish the items to which the ordinal numbers are attached, and do not mean the order, priority, importance, etc. of each item. It's not something you do.

1 Cleaning sheet 2 Fiber aggregate 21 Fiber bundle with non-dust color 22 Strip sheet 23 Fiber bundle with dust color 3 Base sheet 4 Top sheet 41 Insertion part 5 Straight joint part 51 L-shaped joint part 6 1st color section 7 2nd color section 8 Holder A _C cleaning area A _N non-cleaning area

Claims (6)

A disposable cleaning sheet having a cleaning area that comes into contact with a cleaning target and a non-cleaning area that does not come into contact with the cleaning target,
a first color portion located within the non-cleaning area and having a color having a brightness within a range of 4.5 to 9.0 according to the Munsell color system;
a second color portion located within the cleaning area and having a color different from the color of the first color portion;
including;
The cleaning sheet , wherein the color of the second color portion has a higher brightness in the Munsell color system than the color of the first color portion . The cleaning sheet according to claim 1, wherein a boundary between the first color portion and the second color portion is non-linear. The first color portion is located within the cleaning area, at least a part of the peripheral edge of the cleaning area, the center of the cleaning area, or at a plurality of locations in the cleaning area. The cleaning sheet according to claim 1 or 2 . The second color portion is located in the center of the cleaning area,
The cleaning sheet according to any one of claims 1 to 3 , wherein the first color portion is located at a peripheral edge of the cleaning area so as to sandwich at least the second color portion. . 5. The cleaning sheet according to claim 1, wherein each of the first color portion and the second color portion is visible when viewed from above in the thickness direction. The cleaning sheet described in any one of the items. 6. The cleaning sheet according to claim 1, wherein each of the first color portion and the second color portion is visible when viewed from below in the thickness direction. The cleaning sheet described in any one of the items.

Images