CN113662484A - Cleaning sheet - Google Patents
Cleaning sheet Download PDFInfo
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- CN113662484A CN113662484A CN202110526150.6A CN202110526150A CN113662484A CN 113662484 A CN113662484 A CN 113662484A CN 202110526150 A CN202110526150 A CN 202110526150A CN 113662484 A CN113662484 A CN 113662484A
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- Prior art keywords
- cleaning
- cleaning sheet
- layer
- water
- openings
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- 238000004140 cleaning Methods 0.000 title claims abstract description 229
- 239000002344 surface layer Substances 0.000 claims abstract description 128
- 239000010410 layer Substances 0.000 claims abstract description 86
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 44
- 230000000149 penetrating effect Effects 0.000 claims abstract description 5
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- 239000000126 substance Substances 0.000 claims description 51
- 230000002209 hydrophobic effect Effects 0.000 claims description 33
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- 238000013329 compounding Methods 0.000 claims 1
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- 230000000717 retained effect Effects 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 4
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- GMVPRGQOIOIIMI-DWKJAMRDSA-N prostaglandin E1 Chemical compound CCCCC[C@H](O)\C=C\[C@H]1[C@H](O)CC(=O)[C@@H]1CCCCCCC(O)=O GMVPRGQOIOIIMI-DWKJAMRDSA-N 0.000 description 1
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Images
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L13/00—Implements for cleaning floors, carpets, furniture, walls, or wall coverings
- A47L13/10—Scrubbing; Scouring; Cleaning; Polishing
- A47L13/16—Cloths; Pads; Sponges
- A47L13/17—Cloths; Pads; Sponges containing cleaning agents
Landscapes
- Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
Abstract
The invention provides a cleaning sheet which has excellent dirt removing performance and moisture releasing performance and can continuously exert the excellent dirt removing performance. The cleaning sheet (1) of the present invention is characterized by comprising a water holding layer (3) and a surface layer (2) laminated on at least one surface of the water holding layer (3) and forming a wiping surface, wherein the surface layer (2) has a plurality of openings (50) penetrating the surface layer (2) in the thickness direction and non-openings (53) other than the openings (50) at least on the wiping surface, and the water holding layer (3) and the surface layer (2) are locally joined.
Description
Technical Field
The present invention relates to a disposable cleaning sheet for cleaning dust and dirt on a floor surface, furniture, home appliances, and the like.
Background
As a cleaning tool for cleaning floors in rooms, furniture, home appliances, and the like, a disposable type cleaning sheet capable of cleaning a cleaning object in a wet state (wet state) is known.
In addition, various cleaning sheets have been proposed in recent years, and for example, patent document 1 discloses a cleaning tool including a cleaning sheet mounting member and a cleaning sheet, in which a first sheet having water repellency, a second sheet having water repellency, a third sheet having hydrophilicity, and a fourth sheet are provided at a central portion of the cleaning sheet.
Documents of the prior art
Patent document
Patent document 1: japanese patent No. 5777325
Patent document 2: japanese patent laid-open publication No. 2011-224385
Patent document 3: japanese patent laid-open No. 2001-275875
The cleaning sheet disclosed in patent document 1 has a structure in which the first to fourth sheets are 3 or more layers serving as a water-retaining layer (inner layer) and a surface layer (outer layer) and the central portion is not joined, and thus can exhibit excellent moisture releasing properties, but since the surface of the nonwoven fabric forming the surface layer has a flat structure, there is a possibility that the performance of removing dirt such as dust and dirt to be cleaned (hereinafter, simply referred to as "dirt removing performance") cannot be sufficiently exhibited.
On the other hand, the cleaning wet sheet disclosed in patent document 2 is composed of a single-layer fiber aggregate (nonwoven fabric), and by further disposing a mesh sheet inside the nonwoven fabric, the nonwoven fabric has high strength and can exhibit a certain dirt removing performance, but since the nonwoven fabric has a single-layer structure, there is room for improvement in terms of the releasability of moisture such as a cleaning chemical from the nonwoven fabric (hereinafter, simply referred to as "moisture releasability").
In the water-disintegrable wiping sheet disclosed in patent document 3, the plurality of hole portions are provided in the surface sheet, and the hole portions are closed by the intermediate sheet at the boundary portions between the hole portions and the intermediate sheet, so that dirt such as dirt and dust is easily retained in the hole portions, and a certain strength and dirt trapping ability (i.e., dirt removing performance) can be exhibited.
Disclosure of Invention
Accordingly, an object of the present invention is to provide a cleaning sheet which has excellent soil removal performance and moisture release performance and can continuously exhibit the excellent soil removal performance.
Means for solving the problems
An aspect (aspect 1) of the present invention is a cleaning sheet including a water retaining layer and a surface layer laminated on at least one surface of the water retaining layer and forming a wiping surface, wherein the surface layer has a plurality of openings penetrating the surface layer in a thickness direction and non-openings other than the openings at least on the wiping surface, and the water retaining layer is locally bonded to the surface layer.
The cleaning sheet according to embodiment 1 has a plurality of openings on at least the wiping surface of the surface layer, and thus can scrape off dirt such as dirt and dust by the steps at the edge of the openings when wiping a cleaning object, and can exhibit excellent dirt removing performance.
In the cleaning sheet according to embodiment 1, at least the wiping surface of the surface layer has non-opening portions, which are portions other than the plurality of opening portions, such as those present between adjacent opening portions, so that the cleaning chemical retained in the surface layer or the water retaining layer can be appropriately released to the cleaning target, and excellent moisture releasing properties can be exhibited.
Further, since the cleaning sheet according to embodiment 1 is locally joined to the surface layer via the water retaining layer, and the surface layer is likely to move relatively to the water retaining layer, even if scraped dirt remains in the opening, the dirt in the opening can be taken into the water retaining layer or the boundary portion between the water retaining layer and the surface layer by moving the water retaining layer and the surface layer relatively to each other during wiping operation, and the bottom surface of the opening can be formed by the newly exposed surface of the water retaining layer. Thus, the cleaning sheet according to embodiment 1 can continuously exhibit the above-described excellent dirt removing performance.
Another aspect (aspect 2) of the present invention is the cleaning sheet according to aspect 1, wherein the cleaning sheet has a first direction and a second direction orthogonal to each other, and the water-retaining layer and the surface layer are joined to each other at both end regions in the second direction.
The cleaning sheet according to embodiment 2 is configured such that the water-retaining layer and the surface layer are joined to each other at both end regions in the second direction (for example, the width direction), and the surface layer is easily displaced relative to the water-retaining layer in the second direction (preferably, in a direction corresponding to the wiping direction during cleaning) in the central region in the second direction while maintaining the structure as a cleaning sheet. Accordingly, the cleaning sheet of embodiment 2 can exhibit the above-described excellent dirt removing performance more continuously and reliably when the second direction is set as the wiping direction during cleaning.
A further aspect (aspect 3) of the present invention is the cleaning sheet according to aspect 1 or 2, wherein an opening area ratio of the plurality of openings is in a range of 4% to 60%.
In the cleaning sheet according to embodiment 3, the opening area ratio of the plurality of openings is set to 4% or more, whereby a predetermined amount or more of dirt can be scraped off by the step at the edge of the opening, and excellent dirt removal performance can be more reliably exhibited.
In the cleaning sheet of embodiment 3, the opening area ratio of the plurality of openings is 60% or less, so that a predetermined rigidity can be secured as the cleaning sheet and excellent moisture releasing properties can be more reliably exhibited.
A further aspect (aspect 4) of the present invention is the cleaning sheet according to any one of aspects 1 to 3, wherein the cleaning sheet has a first direction and a second direction orthogonal to each other, and the wiping surface has a plurality of openings in a central region of the surface layer in the second direction, the openings having different shapes from those in two end regions of the surface layer in the second direction.
The cleaning sheet according to embodiment 4 can capture dirt such as dirt and dust depending on the shape and size of the wiping surface by the difference in the opening shape of the plurality of openings located in the central region in the second direction (for example, the width direction) and the opening shape of the plurality of openings located in the end regions in the second direction, and can exhibit more excellent dirt removal performance particularly when the second direction is set as the wiping direction during cleaning.
A further aspect (aspect 5) of the present invention is the cleaning sheet according to any one of aspects 1 to 4, wherein the surface layer is formed of a fiber sheet, and the non-opening portion has a raised portion in which constituent fibers of the fiber sheet are raised.
In the cleaning sheet according to embodiment 5, since the surface layer has the raised part in the non-opening part, the fibers raised by the raised part can entangle dirt such as dirt and dust to be cleaned, and more excellent dirt removing performance can be exhibited.
In still another aspect (aspect 6) of the present invention, the cleaning sheet according to aspect 5 is characterized in that the raised fibers of the raised portions have hydrophobic properties.
The cleaning sheet according to embodiment 6 can wipe a cleaning object even with a relatively weak force by the hydrophobic property of the fibers raised at the raised portions, and can more reliably exhibit the above-described excellent dirt removing performance because the fibers are less likely to be aged even when the cleaning sheet is in a wet state.
A further aspect (aspect 7) of the present invention is the cleaning sheet according to any one of aspects 1 to 6, wherein a surface of the surface layer on which the wiping surface is formed has a static friction coefficient in a range of 0.20 to 0.40.
The cleaning sheet according to embodiment 7 has a static friction coefficient of 0.20 or more on the surface of the wiping surface forming the surface layer, and can reliably wipe dirt such as dirt and dust on the cleaning target. In the cleaning sheet of embodiment 7, the surface of the wiping surface forming the surface layer has a static friction coefficient of 0.40 or less, and thus the cleaning sheet can wipe a cleaning object even with a relatively weak force.
A further aspect (aspect 8) of the present invention is the cleaning sheet according to any one of aspects 1 to 7, wherein the surface layer is laminated on both surfaces of the water retaining layer.
In the cleaning sheet according to embodiment 8, the surface layers are laminated on both sides of the water retaining layer, so that both sides of the cleaning sheet can be used as wiping surfaces, and cleaning can be performed more efficiently.
A further aspect (aspect 9) of the present invention is the cleaning sheet according to any one of aspects 1 to 8, wherein the surface layer has a first surface facing the water-retaining layer and a second surface located on an opposite side of the first surface in a thickness direction, and a blending ratio of the hydrophobic material of the second surface is higher than a blending ratio of the hydrophobic material of the first surface.
In the cleaning sheet according to embodiment 9, the blending ratio of the hydrophobic material in the second surface (i.e., the surface forming the wiping surface) of the surface layer is set to be higher than the blending ratio of the hydrophobic material in the first surface, whereby the cleaning chemical discharged from the cleaning sheet is appropriately controlled, and more excellent moisture releasing property can be exhibited.
A further aspect (aspect 10) of the present invention is the cleaning sheet according to any one of aspects 1 to 9, wherein the cleaning sheet is impregnated with a cleaning chemical.
Since the cleaning sheet of embodiment 10 is impregnated with the cleaning chemical liquid, efficient or functional cleaning (e.g., cleaning accompanied by a sterilization effect) can be performed according to the components of the cleaning chemical liquid (e.g., water, surfactant, ethanol, glycerin, etc.).
A further aspect (aspect 11) of the present invention is the cleaning sheet according to aspect 10, wherein an amount of the cleaning chemical solution impregnated into the water-retaining layer is larger than an amount of the cleaning chemical solution impregnated into the surface layer.
In the cleaning sheet according to embodiment 11, since the amount of the cleaning chemical solution impregnated into the water retaining layer is larger than the amount of the cleaning chemical solution impregnated into the surface layer, the cleaning chemical solution is retained relatively more by the water retaining layer, and thus the cleaning chemical solution is easily and continuously released from the cleaning sheet, and excellent moisture releasing properties can be more continuously exhibited.
A further aspect (aspect 12) of the present invention is the cleaning sheet according to aspect 10 or 11, wherein an amount of the cleaning chemical solution impregnated into the water-retaining layer is 1.5 times to 2.5 times an amount of the cleaning chemical solution impregnated into the surface layer.
Since the amount of the cleaning chemical solution impregnated into the water-retaining layer of the cleaning sheet according to embodiment 12 is 1.5 to 2.5 times the amount of the cleaning chemical solution impregnated into the surface layer, an appropriate amount of the cleaning chemical solution can be continuously discharged from the cleaning sheet, and more excellent water releasing properties can be continuously exhibited.
Effects of the invention
According to the present invention, a cleaning sheet having excellent dirt removing performance and moisture releasing performance and capable of continuously exhibiting the excellent dirt removing performance can be provided.
Drawings
FIG. 1 shows a cleaning sheet 1 according to an embodiment of the present invention in a thickness direction D in a state where the cleaning sheet is developedTTop view from above.
Fig. 2 is an enlarged perspective view of a main part of the cleaning sheet 1.
Fig. 3 is an end view of a cross section taken along line III-III of the cleaning sheet 1 in fig. 1.
Fig. 4 is an enlarged cross-sectional view of a main portion of the cleaning sheet 1.
Fig. 5 is an explanatory diagram schematically showing the operation mechanism of the cleaning sheet 1.
Description of reference numerals
1. A cleaning sheet; 2. a surface layer on one side; 3. a water retention layer; 4. a surface layer on the other side; 50. an opening part; 51. 52, an opening part; 53. a non-opening portion; 54. a raised portion; 61. 62, a joint.
Detailed Description
Hereinafter, preferred embodiments of the cleaning sheet according to the present invention will be described in detail with reference to the accompanying drawings.
[ cleaning sheet ]
FIG. 1 shows a cleaning sheet 1 according to an embodiment of the present invention in a thickness direction D in a state where the cleaning sheet is developedTFig. 2 is an enlarged perspective view of a main part of the cleaning sheet 1 as seen from above, and fig. 3 is an end view of a cross section taken along line III-III of the cleaning sheet 1 in fig. 1.
Fig. 4 is an enlarged cross-sectional view of a main portion of the cleaning sheet 1, and fig. 5 is an explanatory view schematically showing an operation mechanism of the cleaning sheet 1.
The cleaning sheet 1 according to an embodiment of the present invention is a sheet-like fiber structure having a function of cleaning a surface of a cleaning object such as a floor surface, furniture, or a home appliance by wiping dust or dirt on the cleaning object, and has a first direction D having a long length in a plan view, as shown in fig. 11And the first direction D1Orthogonal second direction D of short length2The rectangular outer shape of (2). The outer shape of the cleaning sheet 1 is not particularly limited, and any shape (for example, a rectangle, a square, a trapezoid, an oval, etc.) can be adopted according to various uses and the like.
As shown in fig. 1 to 3, the cleaning sheet 1 includes the following main components: a surface layer 2 forming a wiping surface for wiping a cleaning object; a water holding layer 3 laminated on a surface (first surface) of the surface layer 2 opposite to the wiping surface (second surface) and impregnated with a cleaning chemical; and a surface layer 4 laminated on the surface of the water retention layer 3 opposite to the surface layer 2, and forming a wiping surface opposite to the surface layer 2. That is, the cleaning sheet 1 has one surface layer 2, the water-retaining layer 3, and the other surface layer 4 laminated in this order in the thickness direction DTThe above 3-layer laminated structure.
In the cleaning sheet 1 of the present embodiment, as shown in fig. 1 to 3, the surface layers 2 and 4 have a thickness direction D at least on the wiping surfaceTA plurality of openings 50 passing through the surface layers 2, 4 and non-openings 53 except the openings 50, and the water holding layer 3 and the surface layers 2, 4 are respectively positioned in the second direction D of the cleaning sheet 12End area A of one side of1And an end region A on the other side2Are engaged, and in a second direction D2End 63 of the one side and end 6 of the other side4, the water-retaining layer 3 is not included, that is, the water-retaining layer 3 and the surface layers 2 and 4 are locally bonded.
The cleaning sheet 1 having such a configuration has a plurality of openings 50 on at least the wiping surface of the surface layers 2 and 4, and thus when wiping a cleaning object, dirt such as dirt and dust can be scraped off by the steps at the edge of the openings 50, and excellent dirt removing performance can be exhibited.
Further, in the cleaning sheet 1, the non-openings 53 which are portions other than the plurality of openings 50, such as those present between the adjacent openings 50, are provided at least on the wiping surface of the surface layers 2 and 4, whereby the cleaning chemical retained in the surface layers 2 and 4 and the water-retaining layer 3 can be appropriately released to the cleaning object, and excellent moisture releasing properties can be exhibited.
Further, since the cleaning sheet 1 is partially bonded to the surface layers 2 and 4 via the water retaining layer 3, and the surface layers 2 and 4 are likely to move relatively to the water retaining layer 3, even if the scraped dirt D remains in the opening 50 as shown in fig. 5, the water retaining layer 3 and the surface layer 2 move relatively to each other during the wiping operation (in addition, F in fig. 5 a)2And F3Showing the moving direction of the surface layer 2 and the water retaining layer 3, respectively), it is also possible to take in the dirt D in the opening 50 into the water retaining layer 3 or the boundary portion between the water retaining layer 3 and the surface layer 2, and to form the bottom surface of the opening 50 from the newly exposed surface of the water retaining layer 3 (see fig. 5 (b)). Thus, the cleaning sheet 1 can continuously exhibit the above-described excellent dirt removing performance.
In the present embodiment, the surface layers 2 and 4 are laminated on both sides of the water-retaining layer 3, whereby both sides of the cleaning sheet 1 are formed as wiping surfaces, but the present invention is not limited to this embodiment, and the cleaning sheet may be formed by laminating a surface layer only on one surface of the water-retaining layer and forming only one surface of the cleaning sheet as a wiping surface.
However, if the surface layers are laminated on both sides of the water retaining layer as in the above-described embodiment, there is an advantage that both sides of the cleaning sheet can be used as wiping surfaces, and cleaning can be performed more efficiently.
(mode of use)
The cleaning sheet 1 may be used in a manner such that the entire surface of the surface layer 2 or 4 is used as a wiping surface, the cleaning sheet 1 may be used for wiping and cleaning an object to be cleaned in a manner of a spread cloth or a rag, or the cleaning sheet 1 may be used in the second direction D of the surface layer 2 or 42Along a first direction D1Extended central region ACAs a wiping surface, in the second direction D2End area A of one side of1And an end region A on the other side2The holder has a holder (i.e., a holder body) and a holder body (i.e., a holder body) which is attached to the holder body.
In the latter case, the holder is not particularly limited, and may be, for example, a bar-shaped holder made of resin (e.g., polypropylene) or metal (e.g., aluminum) and positioned on the opposite side of the grip portion and holding the distal end portion of the cleaning sheet, and the holder may be a portable holder or a floor holder.
Hereinafter, various members constituting the cleaning sheet of the present invention will be described in more detail with reference to the cleaning sheet 1 of the above embodiment.
[ Water-retaining layer ]
In the cleaning sheet 1, the water-retaining layer 3 is disposed between the surface layer 2 and the surface layer 4, and is formed of a hydrophilic nonwoven fabric capable of retaining the cleaning chemical of the cleaning sheet 1. Since the water-retaining layer 3 is formed of a hydrophilic nonwoven fabric, the cleaning sheet 1 can appropriately release the cleaning chemical retained in the water-retaining layer 3 to the cleaning target through the non-openings 53 of the surface layers 2 and 4.
The hydrophilic nonwoven fabric forming the water retaining layer 3 is not particularly limited as long as it can retain the cleaning chemical, and any hydrophilic nonwoven fabric can be used. Since the hydrophilic nonwoven fabric is only required to have hydrophilicity, the hydrophilic nonwoven fabric may be a nonwoven fabric composed of only hydrophilic fibers, a nonwoven fabric composed of hydrophilic fibers and hydrophobic fibers, or a nonwoven fabric obtained by subjecting a nonwoven fabric composed of only hydrophobic fibers to hydrophilization treatment.
The hydrophilic nonwoven fabric is not particularly limited, and examples thereof include air-laid nonwoven fabrics, wet nonwoven fabrics, spunlace nonwoven fabrics, spunbond nonwoven fabrics, meltblown nonwoven fabrics, thermal bond nonwoven fabrics (for example, through-air nonwoven fabrics, point-bond nonwoven fabrics, etc.), chemical bond nonwoven fabrics, and the like, and air-laid nonwoven fabrics are preferable.
The fibers constituting the hydrophilic nonwoven fabric are not particularly limited as long as the effect of the present invention is not impaired, and for example, cellulose fibers, synthetic fibers, and the like can be used. These cellulose-based fibers and synthetic fibers may be used alone or in combination, and a binder (for example, EVA, SBR, or the like) may be used in combination.
Examples of the cellulose-based fibers include natural cellulose-based fibers such as pulp, cotton, and hemp; regenerated cellulose fibers such as rayon, lyocell, and cuprammonium fibers, and these fibers may be used alone in 1 type or in combination with 2 or more types.
Examples of the synthetic fibers include polyolefin fibers such as Polyethylene (PE) and polypropylene (PP); polyester fibers such as polyethylene terephthalate (PET) and polytrimethylene terephthalate (PTT); polyvinyl alcohol fibers such as vinylon; polyacrylic fibers such as polyacrylonitrile; polyurethane (PU) based fibers; polyamide fibers such as nylon, and these fibers may be used alone in 1 kind or in combination with 2 or more kinds. The form of the synthetic fiber is not particularly limited, and for example, a core-sheath type composite fiber such as PP (core)/PE (sheath), high melting PP (core)/low melting PP (sheath), and PET (core)/PE (sheath) can be used; side-by-side composite fibers; flat, Y-shaped, C-shaped, and the like, and synthetic fibers of any shape.
In the case where the nonwoven fabric is composed of only hydrophobic synthetic fibers, the synthetic fibers before formation of the nonwoven fabric may be subjected to a hydrophilization treatment with a hydrophilization treatment agent or the like, or the nonwoven fabric after formation may be subjected to a hydrophilization treatment with a hydrophilization treatment agent or the like.
The thickness, basis weight, and the like of the hydrophilic nonwoven fabric forming the water-retaining layer 3 are not particularly limited as long as the effects of the present invention are not impaired, and any thickness, basis weight, and the like can be adopted, but the basis weight is preferably 15g/m from the viewpoint of the impregnation property, releasability, and the like of the cleaning chemical solution2～100g/m2A basis weight in the range of (1), more preferably 30g/m2～80g/m2Basis weight in the range of (a).
In the present invention, the water-retentive layer may be formed of any fibrous sheet (e.g., woven fabric, knitted fabric, etc.) other than hydrophilic nonwoven fabric, a resin sheet having water-retentive properties, or the like, as long as it can retain the cleaning chemical.
In the cleaning sheet 1, as shown in fig. 1 to 3, the water-retaining layer 3 is formed to have a second direction length shorter than the surface layers 2 and 4, and is formed in the second direction D2Are joined to the surface layers 2, 4.
Specifically, as shown in fig. 1 to 3, in the cleaning sheet 1, the surface layer 2 is formed to have a second direction length shorter than that of the surface layer 4, and the second direction D of the surface layer 2 is2And the second direction D of the water-retaining layer 32In the thickness direction DTIn the overlapping part, the water retaining layer 3 and the surface layers 2, 4 are arranged to pass in the first direction D1Each of the extended joint portions (i.e., the second direction D in fig. 1 to 3)2The engaging portion 61 on one side and the engaging portion 62 on the other side).
The surface layer 4 is located in a second direction D located outward of the joining portions 61, 622I.e., the second direction D in fig. 1 to 32The one-side end 63 and the other-side end 64) are folded back toward the surface side on which the surface layer 2 and the water-retaining layer 3 are laminated, and the folded-back portions thereof are joined.
In the cleaning sheet 1, as shown in fig. 1, the bonding portions 61 and 62 between the water retaining layer 3 and the surface layers 2 and 4 are respectively positioned in the second direction D of the cleaning sheet 12End area a1 on one side and end area a on the other side2That is, the water-holding layer 3 and the surface layers 2 and 4 are arranged in the second direction D of the cleaning sheet 12Are joined together.
The cleaning sheet 1 is arranged in the second direction D2The water-retaining layer 3 and the surface layers 2 and 4 are bonded to the both end regions, and the cleaning sheet is maintained in the structure thereof and the second direction D2Central region A ofCAs shown in fig. 5, the surface layers 2 and 4 are easily oriented in the second direction D with respect to the water retention layer 32(preferably, a direction corresponding to the wiping direction during cleaning) is shifted relative to the other direction, and therefore, the second direction D is set to be the same as the wiping direction2The above excellent dirt removing performance can be exhibited more continuously and reliably in the case of the wiping direction during cleaning.
Here, as shown in FIG. 1, the second direction D2Central region A ofCIn a second direction D including the cleaning sheet 12In the first direction D1The upward extending region is divided into regions having a second direction length of about 2/4 with respect to the second direction length (the entire length in the second direction) of the cleaning sheet 1, and the second direction D2End area A of one side of1And an end region A on the other side2(i.e., both end regions) are in the second direction D as shown in FIG. 12Both sides of the central region A are sandwichedCAnd the central area ACIn a second direction D2The areas adjacent to each other in the upper direction are divided into areas each having a second direction length of about 1/4 with respect to the second direction length of the cleaning sheet 1.
The cleaning sheet 1 may be arranged at least in the second direction D as the wiping surface2Central region A ofCThe surface layers 2, 4 are easy to move in the second direction D relative to the water retention layer 32When the water retaining layer 3 and the surface layers 2 and 4 are moved so as to be offset relative to each other, the water retaining layer and the surface layers may be formed in the central region aCPartially joined or not in the central region ACAnd joined only at the end regions.
The arrangement of the bonding portions 61, 62 between the water holding layer 3 and the surface layers 2, 4 is not particularly limited as long as the effect of the present invention is not hindered, and for example, the bonding portions 61, 62 may be arranged in the second direction D2A plurality of random coils arranged at predetermined intervals and extending along the first direction D1And an arbitrary linear shape (for example, a linear shape, a dotted line shape, a wavy line shape, a spiral line shape, an omega line shape, etc.). Among these, the joint portions 61 and 62 are preferably arranged in the second direction D from the viewpoint of dirt removal performance and the like2Arranged at an interval of 10mm to 150mm and along a first direction D1The plurality of linear members extend linearly.
The means for forming the joining portions 61 and 62, i.e., the joining means between the water-retaining layer 3 and the surface layers 2 and 4, is not particularly limited as long as the effect of the present invention is not impaired, and any joining means such as a heat fusion method, an ultrasonic fusion method, an adhesive method with an adhesive agent, or the like may be used.
[ surface layer ]
In the cleaning sheet 1, the surface layers 2 and 4 are arranged in the thickness direction DTIs disposed so as to sandwich the water holding layer 3, and is formed of a hydrophobic nonwoven fabric capable of forming a wiping surface for wiping a cleaning target and releasing a cleaning chemical. The surface layers 2 and 4 may be formed of a hydrophilic nonwoven fabric, but if they are formed of a hydrophobic nonwoven fabric, they can wipe the cleaning object even with a relatively weak force, and even if the cleaning sheet is wet, the constituent fibers are less likely to be degraded, and more excellent dirt removing performance can be exhibited.
The hydrophobic nonwoven fabric forming the surface layers 2 and 4 is not particularly limited as long as it can form the wiping surface of the cleaning sheet 1, and any hydrophobic nonwoven fabric can be used. The hydrophobic nonwoven fabric may be a nonwoven fabric composed of only hydrophobic fibers, or a nonwoven fabric composed of hydrophilic fibers and hydrophobic fibers, as long as the nonwoven fabric has hydrophobicity.
The hydrophobic nonwoven fabric is not particularly limited, and examples thereof include a spunlace nonwoven fabric, an air-laid nonwoven fabric, a spunbond nonwoven fabric, a meltblown nonwoven fabric, a thermal bond nonwoven fabric (for example, a through-air nonwoven fabric, a point-bond nonwoven fabric, etc.), a chemical bond nonwoven fabric, and the like, which are produced by a dry process, such as a through-air nonwoven fabric, a point-bond nonwoven fabric, and the like, and a spunlace nonwoven fabric, and particularly a spunlace nonwoven fabric. Since such nonwoven fabrics and spunlace nonwoven fabrics manufactured in a dry manner have a property of being easily stretched (in addition, nonwoven fabrics manufactured in a dry manner have a property of being easily stretched in the CD direction because the fibers are oriented in the MD direction), when the surface layers 2 and 4 are formed of such nonwoven fabrics, the surface layers 2 and 4 are easily moved so as to be offset relative to the water-holding layer 3, and the above-described excellent soil removal performance can be more continuously and reliably exhibited.
The fibers constituting the hydrophobic nonwoven fabric are not particularly limited as long as the effect of the present invention is not impaired, and examples thereof include synthetic fibers and cellulose fibers exemplified as the fibers constituting the hydrophilic nonwoven fabric forming the water-retaining layer 3.
When the hydrophobic nonwoven fabric is composed of the hydrophobic fibers and the hydrophilic fibers, the hydrophobic fibers are present in a proportion of 50 mass% or more, preferably 70 mass% or more, based on the mass of the entire nonwoven fabric.
The thickness, basis weight, and the like of the hydrophobic nonwoven fabric forming the surface layers 2, 4 are not particularly limited as long as the effects of the present invention are not impaired, and any thickness, basis weight, and the like can be adopted, but from the viewpoint of the dirt removing performance of the surface layers 2, 4, the releasability of the cleaning chemical from the non-opening portions 53, and the like, it is preferable that 10g/m is given to each surface layer 12～80g/m2A basis weight in the range of (1), more preferably 30g/m2～60g/m2Basis weight in the range of (a).
In the present invention, the surface layer may be formed of any fiber sheet (for example, woven fabric, knitted fabric, etc.) other than the hydrophobic nonwoven fabric, a porous resin sheet, or the like, as long as the surface layer can form a wiping surface of the cleaning sheet and can release the cleaning chemical.
(opening part)
In the cleaning sheet 1, as shown in fig. 1 to 3, the surface layers 2 and 4 have a thickness direction D over the entire surfaces thereofTA plurality of openings 50-52 penetrating the surface layers 2, 4 and a non-opening 53 except the openings.
As shown in fig. 1 to 3, the plurality of openings 50 to 52 include:the opening 50 extends at least in the second direction D as the wiping surface2Central region A ofCOver the entire face and in the second direction D2Are arranged so that a part of the both end regions is widely dispersed; and openings 51, 52 respectively distributed in the second direction D2Are formed in the two end regions (i.e., the second direction D)2End area A of one side of1And an end region A on the other side2) The opening 50 and the openings 51 and 52 have different opening shapes as shown in fig. 1. The opening 50 and the openings 51 and 52 have the same opening shape when the openings are formed, but the opening shape changes due to the nonwoven fabric being pulled in the subsequent manufacturing process, and the openings have different opening shapes as described above.
The means for forming the plurality of openings 50 to 52 is not particularly limited, and examples thereof include a water jet method in which a water stream is jetted to a net having a plurality of opening patterns, a needle punching method in which holes are punched using a plurality of needle-like members, and a cutting method in which the net is cut into a circular shape using a cutting means such as a cutter. Among them, from the viewpoint of easily forming the below-described raised portions 54 in the non-opening portions 53, the water jet method or the needle punching method is preferably used.
In the cleaning sheet of the present invention, the opening area ratio of the plurality of openings is not particularly limited as long as the effect of the present invention is not impaired, and is preferably in the range of 4% to 60%.
When the opening area ratio of the plurality of openings is 4% or more, a predetermined amount or more of dirt can be scraped off by the step at the edge of the opening, and excellent dirt removal performance can be more reliably exhibited. When the opening area ratio of the plurality of openings is 60% or less, a predetermined rigidity can be ensured as the cleaning sheet, and excellent moisture releasing properties can be more reliably exhibited.
The opening area ratio of the plurality of openings is more preferably in the range of 4% to 50%, and still more preferably in the range of 4% to 35%.
The opening areas of the plurality of openings can be measured as follows.
The surface of a sample to be measured (i.e., a nonwoven fabric forming a cleaning sheet or a surface layer) was observed under magnification at a magnification of 50 times with a MICROSCOPE (VHX-7000 DIGITAL microsoft manufactured by KEYENCE corporation), and the total area ratio of the black portion of the obtained magnified image was measured with a measuring instrument (brightness was set in the range of 0 to 70) attached to the MICROSCOPE. The measured total area ratio of the black portions becomes the opening area ratio of the plurality of openings.
In the cleaning sheet of the present invention, the opening density of the plurality of openings is not particularly limited as long as the effect of the present invention is not impaired, but is preferably 1 opening/cm from the viewpoint of dirt removing performance2100 pieces/cm2Within the range of (1).
The opening shape of the opening is not particularly limited, and any shape such as an ellipse, a circle, a triangle, a quadrangle, a polygon, and a star can be used.
The size of the opening shape is also not particularly limited, and for example, in the case where the opening shape is a circular shape, the size is 1mm to 5mm in diameter, and in the case where the opening shape is an oval shape, the size is 1mm to 5mm in major diameter and 0.1mm to 4mm in minor diameter.
In the cleaning sheet of the present invention, the surface layer may be formed on the wiping surface such that the plurality of openings located in the central region in the second direction have opening shapes different from the opening shapes of the plurality of openings located in the opposite end regions in the second direction.
When the opening shapes of the plurality of openings located in the central region in the second direction are different from the opening shapes of the plurality of openings located in the end regions in the second direction, dirt such as dirt and dust can be captured according to the shape and size of the openings.
For example, when the plurality of openings located in the opposite end regions in the second direction, which is the wiping direction at the time of cleaning, have a small aspect ratio and are long in the first direction or have a circular opening shape, and the plurality of openings located in the central region in the second direction have a large aspect ratio and are long in the first direction, dust and granular dirt can be captured by the plurality of openings located in the opposite end regions, and dirt that has escaped from the plurality of openings located in the opposite end regions can be captured by the plurality of openings located in the central region.
(non-opening part)
In the cleaning sheet 1, as shown in fig. 1 to 3, the surface layers 2 and 4 have non-opening portions 53 other than the plurality of opening portions 50 to 52 on the entire surfaces thereof.
In the cleaning sheet 1, as shown in fig. 4, the non-openings 53 have raised portions 54 formed by raising the constituent fibers of the hydrophobic nonwoven fabric constituting the surface layers 2 and 4.
As described above, when the non-opening portions 53 of the surface layers 2 and 4 have the raised portions 54, the fibers 54F raised by the raised portions 54 can wrap dirt such as dirt and dust to be cleaned, and thus can exhibit more excellent dirt removing performance.
In the present embodiment, the raised portions 54 are formed of the constituent fibers of the hydrophobic nonwoven fabric forming the surface layers 2 and 4, but in the present invention, the raised portions of the surface layers may be formed of the constituent fibers of a fibrous sheet such as a nonwoven fabric, a woven fabric, or a knitted fabric.
Here, in the present specification, the raised portion means a portion in which 5 or more cut terminals of the constituent fibers (i.e., raised fibers) exposed on the surface of the fiber sheet are present within 5mm in the direction parallel to the sheet surface of the fiber sheet when a cut surface obtained by cutting the fiber sheet (e.g., nonwoven fabric, woven fabric, knitted fabric, etc.) forming the surface layer in the thickness direction is observed in an enlarged manner.
In the cleaning sheet of the present invention, it is preferable that the cut terminals of the constituent fibers exposed on the surface of the fiber sheet are substantially uniformly present over the entire non-opening portion, for example, 1 or more cut terminals are present in a range of 1mm in a direction parallel to the sheet surface, from the viewpoint of dirt removal performance.
In the cleaning sheet 1, the surface layers 2 and 4 are formed of a hydrophobic nonwoven fabric, and therefore the fibers 54F having the raised portions 54 have hydrophobicity.
As described above, if the fibers 54F raised in the raised portions 54 have hydrophobicity, the cleaning object can be wiped with a relatively weak force, and the fibers are less likely to be degraded even when the cleaning sheet 1 is in a wet state, so that the above excellent dirt removing performance can be more reliably exhibited.
In the present invention, the term "the fluffed fibers have hydrophobicity" means that the mass ratio of the fibers having hydrophobicity in the whole fibers having fuzzing is 50 mass% or more, and the mass ratio of the fibers having hydrophobicity is preferably 70 mass% or more.
In the present invention, the surface of the surface layer forming the wiping surface preferably has a static friction coefficient in the range of 0.20 to 0.40.
If the surface of the wiping surface forming the surface layer has a static friction coefficient of 0.20 or more, dirt such as dirt and dust on the cleaning target can be reliably wiped off, and if the surface of the wiping surface forming the surface layer has a static friction coefficient of 0.40 or less, the cleaning target can be wiped off even with a relatively weak force.
The static friction coefficient of the surface layer can be measured using a commercially available tribometer (for example, MUSE, a portable tribometer manufactured by japan society).
In the present invention, it is preferable that the surface layer has a first surface facing the water-retention layer and a second surface located on the opposite side of the first surface in the thickness direction, and the blending ratio of the hydrophobic material (for example, hydrophobic fiber or the like) of the second surface is higher than that of the first surface.
When the blending ratio of the hydrophobic material of the second surface (i.e., the surface forming the wiping surface) of the surface layer is higher than the blending ratio of the hydrophobic material of the first surface, the cleaning chemical discharged from the cleaning sheet can be appropriately controlled, and more excellent moisture releasing property can be exhibited.
In the present invention, the cleaning sheet may be impregnated with the cleaning chemical solution during the production thereof, or the cleaning sheet may be impregnated with the cleaning chemical solution during the use thereof without being impregnated with the cleaning chemical solution during the production thereof.
However, the cleaning sheet impregnated with the cleaning chemical solution in advance as in the former has an advantage that efficient or functional cleaning (for example, cleaning accompanied by a sterilization effect) can be performed according to the components of the cleaning chemical solution (for example, water, a surfactant, ethanol, glycerin, and the like).
In the present invention, the amount of the cleaning chemical solution impregnated into the water-retaining layer is preferably larger than the amount of the cleaning chemical solution impregnated into the surface layer.
When the amount (mass) of the cleaning chemical solution impregnated into the water-retaining layer is larger than the amount of the cleaning chemical solution impregnated into the surface layer and the water-retaining layer holds the cleaning chemical solution relatively in a large amount, the cleaning chemical solution is more easily and continuously released from the cleaning sheet, and therefore, the excellent water releasing property can be more continuously exhibited.
In the case where the surface layers are laminated on both surfaces of the water-retaining layer, the amount of the cleaning chemical solution to be impregnated into the surface layers does not mean the total amount of the both surface layers, but means the amount of the cleaning chemical solution to be impregnated into each surface layer.
In the present invention, the amount of the cleaning chemical solution impregnated into the water-retaining layer is preferably 1.5 to 2.5 times the amount of the cleaning chemical solution impregnated into the surface layer.
If the amount of the cleaning chemical solution impregnated into the water-retaining layer is 1.5 to 2.5 times the amount of the cleaning chemical solution impregnated into the surface layer, an appropriate amount of the cleaning chemical solution can be continuously discharged from the cleaning sheet, and more excellent moisture releasing properties can be more continuously exhibited.
The cleaning sheet of the present invention is not limited to the above-described embodiments, and can be appropriately combined, substituted, or modified without departing from the object and spirit of the present invention. In the present specification, ordinal numbers such as "first" and "second" are used to distinguish items including the ordinal number, and do not mean the order, priority, importance, and the like of the items.
Claims (12)
1. A cleaning sheet comprising a water-retaining layer and a surface layer laminated on at least one side of the water-retaining layer and forming a wiping surface,
it is characterized in that the preparation method is characterized in that,
the surface layer has a plurality of openings penetrating the surface layer at least in the wiping surface in the thickness direction and non-openings other than the openings,
the water retention layer is locally joined to the surface layer.
2. A cleaning sheet according to claim 1,
the cleaning sheet has a first direction and a second direction orthogonal to each other,
the water-retaining layer and the surface layer are joined at both end regions in the second direction.
3. A cleaning sheet according to claim 1 or 2,
the opening area ratio of the plurality of openings is in the range of 4% to 60%.
4. A cleaning sheet according to claim 1 or 2,
the cleaning sheet has a first direction and a second direction orthogonal to each other,
in the wiping surface, the plurality of openings in the surface layer in the central region in the second direction have different opening shapes from the plurality of openings in the opposite end regions in the second direction.
5. A cleaning sheet according to claim 1 or 2,
the surface layer is formed of a fiber sheet, and has a raised part in which the constituent fibers of the fiber sheet are raised at the non-opening part.
6. A cleaning sheet according to claim 5,
the raised fibers of the raised portions have hydrophobic properties.
7. A cleaning sheet according to claim 1 or 2,
the surface of the surface layer forming the wiping surface has a static friction coefficient in the range of 0.20 to 0.40.
8. A cleaning sheet according to claim 1 or 2,
the superficial layer range upon range of in the two sides of guarantor's water layer.
9. A cleaning sheet according to claim 1 or 2,
the surface layer has a first surface opposed to the water retention layer and a second surface located on the opposite side of the first surface in the thickness direction,
the compounding ratio of the hydrophobic material of the second surface is higher than that of the hydrophobic material of the first surface.
10. A cleaning sheet according to claim 1 or 2,
the cleaning sheet is impregnated with a cleaning chemical.
11. A cleaning sheet according to claim 10,
the dipping amount of the cleaning chemical liquid of the water retention layer is more than that of the cleaning chemical liquid of the surface layer.
12. A cleaning sheet according to claim 10,
the dipping amount of the cleaning liquid medicine of the water retention layer is 1.5 times to 2.5 times of that of the cleaning liquid medicine of the surface layer.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020-086094 | 2020-05-15 | ||
| JP2020086094A JP2021178127A (en) | 2020-05-15 | 2020-05-15 | Cleaning sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113662484A true CN113662484A (en) | 2021-11-19 |
Family
ID=78509747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110526150.6A Pending CN113662484A (en) | 2020-05-15 | 2021-05-14 | Cleaning sheet |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2021178127A (en) |
| CN (1) | CN113662484A (en) |
| TW (1) | TW202207861A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115005729A (en) * | 2022-07-06 | 2022-09-06 | 欣龙控股（集团）股份有限公司 | Pitted surface breathable scouring pad |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3409988B2 (en) * | 1997-03-21 | 2003-05-26 | ユニ・チャーム株式会社 | Wipe sheet |
| JPH11267079A (en) * | 1998-03-25 | 1999-10-05 | Uni Charm Corp | Cleaning item of multi-layer structure |
| JP4628352B2 (en) * | 2006-12-29 | 2011-02-09 | 花王株式会社 | Cleaning sheet |
| JP2009153687A (en) * | 2007-12-26 | 2009-07-16 | Lion Corp | Floor cleaning sheet |
| JP5777325B2 (en) * | 2010-11-11 | 2015-09-09 | ユニ・チャーム株式会社 | Cleaning tool and cleaning sheet |
| JP6960719B2 (en) * | 2016-03-04 | 2021-11-05 | ユニ・チャーム株式会社 | Non-woven fabric for wet wipes and its manufacturing method |
-
2020
- 2020-05-15 JP JP2020086094A patent/JP2021178127A/en active Pending
-
2021
- 2021-05-06 TW TW110116336A patent/TW202207861A/en unknown
- 2021-05-14 CN CN202110526150.6A patent/CN113662484A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115005729A (en) * | 2022-07-06 | 2022-09-06 | 欣龙控股（集团）股份有限公司 | Pitted surface breathable scouring pad |
| CN115005729B (en) * | 2022-07-06 | 2024-04-23 | 欣龙控股（集团）股份有限公司 | Breathable pitted surface scouring pad |
Also Published As
| Publication number | Publication date |
|---|---|
| TW202207861A (en) | 2022-03-01 |
| JP2021178127A (en) | 2021-11-18 |
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Application publication date: 20211119 |