WO2018003566A1 - Cleaning sheet - Google Patents

Abstract

In order to improve dust-scraping performance and dust-collecting performance, a cleaning sheet is provided with a configuration which includes a second fibrous sheet (3), a third fibrous sheet (4) comprising a paper material containing a cellulose ingredient, and an elastic member (5) laminated to the second fibrous sheet and the third fibrous sheet and shrinking the second fibrous sheet and the third fibrous sheet, and in which a rugged surface has been formed.

Description

Cleaning sheet

The present invention relates to a cleaning sheet for removing dust and the like.

In recent years, cleaning tools for removing hair, cotton dust, dust, bacteria, etc. (hereinafter collectively referred to as “dust”) that have fallen on the flooring have become popular. When the flooring mop is used, a disposable cleaning sheet made of a nonwoven fabric or the like is attached to the flooring mop body, and when the cleaning sheet becomes dirty due to use, it can be replaced with a new cleaning sheet. As such a cleaning sheet, for example, a cleaning sheet disclosed in Patent Document 1 is known.

The cleaning sheet disclosed in Patent Document 1 has a plurality of linear elastic members attached in parallel between opposing sheet base materials, and the sheet base material has linear elastic members due to the contraction force of the linear elastic members. A convex part and a concave part are formed along a direction orthogonal to the extending direction of the. These convex portions and concave portions are repeatedly formed along the extending direction of the linear elastic member.

JP-A-2015-92954

However, in the cleaning sheet disclosed in Patent Document 1 described above, the convex portions and the concave portions have the same size, and a uniform concave and convex surface is formed. However, the trapping performance for capturing dust and the dust that has entered a narrow gap The effect of improving the scraping performance is poor. Moreover, the manufacturing process of the said cleaning sheet includes the redundant process, and causes the increase in cost.

An object of the present invention is to provide a cleaning sheet that is excellent in dust scraping performance and trapping performance and that reduces the manufacturing cost.

The cleaning sheet according to the first aspect of the present invention is laminated with a first fiber sheet, a second fiber sheet made of a material containing a cellulosic component, the first fiber sheet and the second fiber sheet, An elastic member that contracts the first fiber sheet and the second fiber sheet, and has a configuration in which an uneven surface is formed.

The cleaning sheet according to the second aspect of the present invention is laminated between the first fiber sheet and the second fiber sheet of nonwoven fabric, at least one of which is mesh-shaped, and the first fiber sheet and the second fiber sheet. And an elastic member that contracts the first fiber sheet and the second fiber sheet, and the first fiber sheet and the second fiber sheet cause the elastic member to be bonded by an adhesive applied to the elastic member. The structure joined via is taken.

According to the present invention, it is possible to improve dust scraping performance and capture performance, and to reduce the manufacturing cost.

The front view of the cleaning sheet which concerns on Embodiment 1 of this invention The perspective view of the cleaning sheet shown in FIG. The principal part enlarged view of the cleaning sheet shown in FIG. AA line sectional view of FIG. The expanded sectional view of the cleaning sheet shown in FIG. The figure which shows the cleaning tool which concerns on Embodiment 1 of this invention. Cross-sectional schematic diagram of cleaning sheet Cross-sectional schematic diagram of cleaning sheet The figure for explaining the adhesive penetration part Schematic diagram for explaining arrangement intervals of a plurality of elastic members Schematic diagram for explaining the arrangement pattern of a plurality of elastic members The figure which shows the structure of the cleaning sheet manufacturing apparatus which concerns on Embodiment 1 of this invention. Schematic diagram for explaining the processing applied to the cleaning sheet Sectional schematic diagram of the cleaning sheet which concerns on Embodiment 2 of this invention. Sectional schematic diagram of the cleaning sheet which can be used on both sides according to Embodiment 2 of the present invention The schematic diagram which shows the structure of the embossing roll which concerns on Embodiment 3 of this invention. The enlarged view of the cleaning sheet which concerns on Embodiment 5 of this invention. 17 is a schematic cross-sectional view of the cleaning sheet shown in FIG. External appearance perspective view which shows the cleaning sheet which concerns on Embodiment 6 of this invention. Sectional schematic diagram of the cleaning sheet which concerns on Embodiment 7 of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, in the embodiment, the same reference numerals are given to the same components, and duplicate descriptions are omitted.

(Embodiment 1)
The first embodiment of the present invention will be described assuming a dry type cleaning sheet as the cleaning sheet. In the following description, dust removal, dust capture, water absorption, and dirt removal are collectively referred to as cleaning.

[Composition of cleaning sheet]
FIG. 1 is a front view of a cleaning sheet 1 according to Embodiment 1 of the present invention. 2 is a schematic perspective view of the cleaning sheet 1 shown in FIG. 1, and FIG. 3 is an enlarged view of a main part of the cleaning sheet 1 shown in FIG. 4 is a cross-sectional view taken along the line AA of FIG. 3, and FIG. 5 is an enlarged cross-sectional view of the cleaning sheet shown in FIG. In FIGS. 1 to 5, the cleaning sheet 1 is rectangular, the short direction of the cleaning sheet 1 is the x direction, and the long direction of the cleaning sheet 1 is the y direction. Hereinafter, the configuration of the cleaning sheet 1 will be described with reference to FIGS.

As shown in FIG. 5, the cleaning sheet 1 includes a first fiber sheet 2, a second fiber sheet 3, a third fiber sheet 4, and an elastic member 5, and is a laminated sheet in which these are laminated in a predetermined order. In the example of FIG. 5, the predetermined order is the order of the first fiber sheet 2, the elastic member 5, the third fiber sheet 4, and the second fiber sheet 3 from the top.

The first fiber sheet 2 is a non-woven fabric. Moreover, the 1st fiber sheet 2 has a hydrophilic property or lipophilic property, for example. One surface of the first fiber sheet 2 corresponds to the outer surface of the cleaning sheet 1, and the other surface of the first fiber sheet 2 is joined to the third fiber sheet 4 via the elastic member 5.

The second fiber sheet 3 is a non-woven fabric and preferably has a mesh shape. Moreover, the 2nd fiber sheet 3 has a hydrophilic property or lipophilic property, for example. One surface of the second fiber sheet 3 forms an outer surface opposite to the outer surface formed by the first fiber sheet 2, and the other surface of the second fiber sheet 3 is a third surface to which the first fiber sheet 2 is bonded. It joins with the surface on the opposite side to the surface of the fiber sheet 4. When the second fiber sheet 3 and the third fiber sheet 4 are joined, an adhesive layer 7 is formed between the second fiber sheet 3 and the third fiber sheet 4 by applying an adhesive.

The third fiber sheet 4 is a liquid-diffusible fiber sheet mainly containing a cellulose component. For example, paper (non-hydrolyzed tissue, crepe paper, etc.), pulp manufactured through a paper manufacturing process such as a papermaking process, pulp An airlaid nonwoven fabric produced by pulverizing the fiber and passing through a process such as stacking, or a spunlace nonwoven fabric including rayon and pulp fibers. As described above, one surface of the third fiber sheet 4 is bonded to the first fiber sheet 2 via the elastic member 5, and the other surface is bonded to the second fiber sheet 3. Moreover, the 3rd fiber sheet 4 may be provided with the printing layer 4a. The details of the print layer 4a will be described later.

The elastic member 5 applies a force in a contracting direction to the first fiber sheet 2, the second fiber sheet 3, and the third fiber sheet 4. The elastic member 5 is linear and cylindrical, and has a circular cross-sectional shape. The elastic member 5 is formed of urethane, silicone, butadiene, synthetic rubber based on styrene / butadiene, natural rubber, or the like. The elastic member 5 may be a combination of any of these synthetic rubber and natural rubber materials. The elastic member 5 is arranged such that the extending direction is the same as the x direction, and the plurality of elastic members 5 are arranged in the y direction with a certain distance therebetween. Thereby, the elastic members 5 are arranged in a row. The arrangement intervals and arrangement patterns of the plurality of elastic members 5 will be described later. The elastic member 5 is not limited to a cylindrical shape, and may be a triangular prism shape, a quadrangular prism shape, another polygonal column shape, or an elliptical column shape. Further, the elastic member 5 is not limited to a linear shape, and may be a sheet shape.

When the elastic member 5 is bonded to the first fiber sheet 2 and the third fiber sheet 4, it is stretched and bonded at a predetermined magnification. The magnification is the length of the elastic member 5 in a state in which the elastic member 5 is pulled by applying an external force to the length S of the elastic member 5 in a state where an external force (tensile force) other than gravity is not applied to the elastic member 5. The ratio of L, that is, L / S is defined. When the stretched state of the elastic member 5 is released, a non-uniform uneven surface that repeats the recesses 6a and the protrusions 6b alternately is formed on the cleaning sheet 1 by the contraction force of the elastic member 5 (FIG. 2 to FIG. 2). (See FIG. 4).

The predetermined magnification for stretching the elastic member 5 is preferably 1.2 to 4 times, and more preferably 2 to 3 times. When the magnification is less than 1.2, the contraction force when the stretched state of the elastic member 5 is released is small, and the uneven surface cannot be sufficiently formed on the cleaning sheet 1. On the other hand, when the magnification is 4 times or more, the contraction force of the elastic member 5 is too large, the uneven surface formed on the cleaning sheet 1 is too uneven, looks bad, and the dust capturing performance is also lowered. .

The pitch interval between the adjacent convex portions 6b formed on the cleaning sheet 1 is preferably 2.00 mm to 7.00 mm, and more preferably 3.00 mm to 6.25 mm. By narrowing the pitch interval between the adjacent convex portions 6b, a fine uneven surface can be formed, so that the appearance is beautiful and the surface area per unit volume is increased, so that it can be efficiently cleaned. In addition, the shrinking force of the elastic member 5 is moderately suppressed, and the pitch interval between the adjacent convex portions 6b is widened, thereby forming a non-uniform uneven surface and improving the capturing performance for capturing various sizes of dust. Can be made.

[About joining method]
Next, the joining method at the time of forming the cleaning sheet 1 mentioned above is demonstrated. Examples of the bonding method include adhesion, heat fusion, ultrasonic bonding, sewing, and the like, but adhesion is preferable from the viewpoint of ease of work. Hereinafter, a case where bonding using a hot melt adhesive is performed as a bonding method will be described. Hot melt adhesives include EVA (ethylene / vinyl acetate copolymer), PO (polyolefin), PA (polyamide), SR (silicone synthetic rubber), ACR (acrylic), PUR (polyurethane and moisture) (Curing type) type adhesives and the like, and these may be used alone or in combination of two or more. In addition, as an adhesive agent used for joining the second fiber sheet 3 and the third fiber sheet 4, an organic solvent-based adhesive, a water-soluble adhesive, or the like can be used in addition to the hot melt adhesive.

When the hot melt adhesive is applied to the third fiber sheet 4 by spraying or the like, the second fiber sheet 3 and the third fiber sheet 4 can be partially joined as shown in FIG. Thereby, both can be laminated and joined. A hot melt adhesive may be applied to the second fiber sheet 3 in a mist form. In addition to the mist form, the hot melt adhesive application method includes a method of applying in a line shape, a dot shape, a stripe shape, a spiral shape, a block shape, a pattern shape, etc., and any one of them is used. It may be used, or a plurality of methods may be used in combination.

At this time, a non-adhesive portion 8 where the adhesive layer 7 does not exist is formed between the second fiber sheet 3 and the third fiber sheet 4, and a space is formed by the non-adhesive portion 8. The area ratio of the non-bonded portion 8 in the second fiber sheet 3 in plan view is preferably 5 to 85%, more preferably 10 to 80%, relative to the area of the second fiber sheet 3. More preferably, it is ˜75%.

Further, the hot melt adhesive is applied to the entire peripheral surface of the elastic member 5 by spraying or the like, and the elastic member 5 applied with the hot melt adhesive is interposed between the third fiber sheet 4 and the first fiber sheet 2. They are arranged and laminated and joined. An adhesive layer 7 is formed around the elastic member 5. The first fiber sheet 2 and the third fiber sheet 4 are joined via an elastic member 5 coated with a hot melt adhesive, and the plurality of elastic members 5 are arranged in parallel at predetermined intervals. Therefore, the first fiber sheet 2 and the third fiber sheet 4 are partially joined.

Although not particularly illustrated in FIG. 5, the opposing surfaces of the first fiber sheet 2 and the third fiber sheet 4 where the elastic member 5 does not exist are non-adhesive portions, and a space is formed by the non-adhesive portions.

[About the first fiber sheet 2 and the second fiber sheet 3]
Examples of the nonwoven fabric material used for the first fiber sheet 2 and the second fiber sheet 3 include a spunbond nonwoven fabric, a thermal bond nonwoven fabric, a spunlace nonwoven fabric, a dry nonwoven fabric, a wet nonwoven fabric, a melt blown nonwoven fabric, a chemical bond nonwoven fabric, and a needle punch nonwoven fabric. , Stitch bond nonwoven fabric, steam jet nonwoven fabric and the like.

The first fiber sheet 2 and the second fiber sheet 3 may be the same nonwoven fabric or different nonwoven fabrics. The different non-woven fabrics mentioned here include those of the same type of non-woven fabric, but different in basis weight, processing and the like.

Basis weight of the nonwoven fabric used for the first fiber sheet 2 and the second fiber sheet 3 is preferably 5 ~ 60 g / ^{m 2,} more preferably 7 ~ 40g / ^{m 2.} The reason why the basis weight of the nonwoven fabric is within the above range is that when the basis weight is less than 5 g / m ² , for example, when the hot melt adhesive is applied, the hot melt adhesive may ooze out on the surface of the nonwoven fabric. Because there is. Further, if the basis weight exceeds 60 g / m ² , the thickness as a product becomes thick, and the production efficiency deteriorates. When the basis weight of the nonwoven fabric is 7 to 40 g / m ² , the bonding strength can be increased by using a bonding method using a hot melt adhesive and a bonding method using heat sealing or ultrasonic bonding.

[About the third fiber sheet 4]
For the third fiber sheet 4, a material mainly composed of pulp, that is, a material containing a cellulose-based component (hereinafter sometimes referred to as “paper material”) can be used. For example, the third fiber sheet 4 is manufactured using a paper material, a paper (tissue, crepe paper, etc.) manufactured through a paper manufacturing process such as a papermaking process, and a process such as stacking by pulverizing pulp. Air-laid nonwoven fabrics, or spunlace nonwoven fabrics containing rayon and pulp fibers.

As the raw material pulp, any of wood pulp, waste paper pulp, etc., or a combination of at least one of them can be used. As the wood pulp, for example, softwood bleached kraft pulp obtained from conifers such as red pine, Ezo pine, todo pine, Douglas fir, hemlock, and spruce can be used. Moreover, the pulp formed by blending hardwood bleached kraft pulp obtained from hardwood such as beech, oak, hippopotamus, eucalyptus, oak, poplar, alder, and softwood bleached kraft pulp can also be used. However, it is preferable to use softwood bleached kraft pulp alone from the viewpoint of manufacturing cost and production efficiency.

In addition to the above paper materials, for example, natural fibers such as kenaf, bamboo fiber, cocoon, cotton, silk thread, sugar cane and wool can be used. Moreover, it is not restricted to these natural fibers containing a pulp, Regenerated fibers, such as rayon, a viscose rayon, and a toilet paper material, can also be used. Also, synthetic fibers such as nylon, PEs (Polyester), PET (Polyethylene terephthalate), PE (Polyethylene), PP (Polypropylene), etc. can be used. These may be used individually by 1 type, and may use the composite fiber which used 2 or more types together.

When the 3rd fiber sheet 4 is formed from the material which uses a pulp as a main raw material, it is preferable that the mixing | blending of a pulp is 30% or more, It is more preferable that it is 50% or more, Furthermore, 80% The above is most preferable. By setting the blending ratio of the pulp to the above ratio, the flexibility of the cleaning sheet 1 as a whole can be improved, and the production efficiency at the time of manufacture can be improved.

Moreover, the usage-amount of a petroleum-type raw material can be reduced by making the compounding ratio of the pulp in the 3rd fiber sheet 4 high. Therefore, when the cleaning sheet 1 is discarded, the amount of CO ₂ generated by incineration and other factors that give a load to the environment can be reduced. As a result, the load on the environment can be reduced.

In addition, when paper such as tissue is used for the third fiber sheet 4, a single layer made of a single sheet of paper is preferable, but a multi-layered structure in which a plurality of sheets of paper are stacked may be used. In the case of multiple layers, the paper material and thickness of each layer may be the same or different.

In addition, the paper material used for the 3rd fiber sheet 4 may mix | blend the said pulp with the nonwoven fabric. For example, a spunlace nonwoven fabric blended with the above pulp can be used as a paper material.

The basis weight of the paper material constituting the third fiber sheet 4 is preferably 7 to 50 g / m ² . When the basis weight is less than 7 g / m ² , the strength as the cleaning sheet 1 is insufficient. On the other hand, when the weight per unit area exceeds 50 g / m ² , the thickness of the fabric increases, and it becomes difficult to pack the product during product packing. Therefore, a more preferable basis weight of the paper material is 10 to 30 g / m ² .

Color paper may be used as a paper material constituting the third fiber sheet 4. Thereby, the 3rd fiber sheet 4 with high aesthetics can be provided.

The third fiber sheet 4 is preferably subjected to a treatment for imparting flexibility (mechanical softening treatment) by performing a mechanical treatment such as an embossing treatment. As the embossing roll used for the embossing treatment, a pair of embossing rolls formed by forming a large number of protrusions on the roll surface is used. When embossing is performed using this embossing roll, a number of fine holes are opened in the third fiber sheet 4 and the paper structure is weakened at the same time, so that the third fiber sheet 4 is given flexibility. This hole may be a circular hole or a linear hole (slit). Moreover, a softness | flexibility can be provided to the 3rd fiber sheet 4 also by forming many unevenness | corrugations and making it a rough surface without opening a hole in the 3rd fiber sheet 4. FIG.

The embossing roll used for the embossing process is not limited to a roll having protrusions, and a pair of flat rolls having a smooth roll surface without protrusions may be used. By passing the third fiber sheet 4 between a pair of flat rolls and pressing it with the rolls, the paper structure is weakened. That is, even if the punching process is not performed, the paper structure is weakened by the pressing force between the rolls. Therefore, the embossing process for imparting flexibility to the paper material can be performed by combining the embossing process using an embossing roll having protrusions on the roll surface and the embossing process using a flat roll.

By giving flexibility to the third fiber sheet 4, the cleaning sheet 1 as a whole also has flexibility, so that followability to the surface to be cleaned can be improved and dust capturing performance can be improved. .

[Configuration of the cleaning tool body]
FIG. 6 is a diagram illustrating the cleaning tool 10 according to the first embodiment of the present invention. The cleaning tool 10 includes a cleaning tool body 11 and a cleaning sheet 1. The cleaning tool main body 11 mainly includes a head portion 12 and a handle 13.

The bottom surface of the head portion 12 is rectangular in plan view, and the cleaning sheet 1 is mounted on the head portion 12 so as to face the bottom surface. At this time, the cleaning sheet 1 is mounted so that the extending direction of the elastic member 5 is parallel to the short direction of the head portion 12. The cleaning sheet 1 may be mounted so that the extending direction of the elastic member 5 is parallel to the longitudinal direction of the head portion 12.

Near the four corners of the upper surface of the head portion 12, fixing portions 14 are provided. The fixing portion 14 fixes an end portion of the cleaning sheet 1 mounted on the bottom surface of the head portion 12 that is folded back from the bottom surface to the top surface.

A handle 13 is provided in the vicinity of the center of the upper surface of the head portion 12 so as to be rotatable. By operating the handle 13, the head portion 12 can be reciprocated mainly in the short direction.

In addition, when mounting the cleaning sheet 1 on the head unit 12, the cleaning sheet 1 may be mounted while being pulled in the direction in which the elastic member 5 extends. Thereby, the wiping performance of dirt can be improved rather than the dust capturing performance.

[Operational effect of cleaning sheet 1]
FIG. 7 is a schematic cross-sectional view of the cleaning sheet 1. In FIG. 7, the 2nd fiber sheet 3 is arrange | positioned at the side which capture | acquires the dust of a to-be-cleaned surface. The surface to be cleaned is a surface to be cleaned using the cleaning sheet 1, for example, flooring, tatami mats, stairs, walls, ceilings and other houses, mirrors, desks, tables, other furniture, home appliances, etc. Say.

The cleaning sheet 1 forms a non-uniform concavo-convex surface in which the concave portions 6a and the convex portions 6b, which are not constant in size, are continuously formed by the contraction force of the elastic member 5. The surface area of can be increased. For this reason, the dust capture performance of the cleaning sheet 1 can be improved.

Further, since the uneven surface of the cleaning sheet 1 is non-uniform, it becomes easy to capture various types of dust such as bread crumbs, hair, and cotton dust, and the dust capturing performance can be improved.

The concave portion 6a and the convex portion 6b formed in the cleaning sheet 1 by the contraction force of the elastic member 5 extend in a direction crossing the direction in which the elastic member 5 extends. The concave portion 6a and the convex portion 6b are not uniform in width, height and length due to the influence of the first fiber sheet 2 and the third fiber sheet 4 joined to the elastic member 5, and the extending shape is also It is not necessarily linear, and it is gently curved or branched. For this reason, it becomes easy for dust to enter the vicinity of the center of the cleaning sheet 1 along the direction in which the uneven recesses 6a and the protrusions 6b extend, and the dust capturing performance can be improved. Further, the trapped dust can be prevented from being discharged from the cleaning sheet 1 because the shape in which the concave portion 6a and the convex portion 6b extend is uneven. In this case, it is assumed that the cleaning sheet 1 is used so that the extending direction of the elastic member 5 is parallel to the longitudinal direction of the head portion 12.

Further, in the region where the elastic member 5 is disposed, a groove is formed along the direction in which the elastic member 5 expands due to the contraction of the elastic member 5. The width and depth of the groove are not uniform due to the influence of the first fiber sheet 2 and the third fiber sheet 4 joined to the elastic member 5. For this reason, it becomes easy for dust to enter the vicinity of the center of the cleaning sheet 1 along the direction in which the elastic member 5 extends, and the dust capturing performance can be improved. Further, the trapped dust can be prevented from being discharged from the cleaning sheet 1 because the shape of the groove is not uniform. In this case, it is assumed that the cleaning sheet 1 is used so that the direction in which the elastic member 5 extends is parallel to the short direction of the head portion 12.

Further, by making the cleaning sheet 1 as simple as described above, the manufacturing process of the cleaning sheet 1 can be simplified, and the manufacturing cost can be reduced.

Moreover, since the 2nd fiber sheet 3 is a mesh-like nonwoven fabric, it can capture | acquire dust efficiently between meshes.

Moreover, since the cleaning sheet 1 has the 3rd fiber sheet 4 which consists of paper materials, the 3rd fiber sheet 4 will raise the rigidity of the convex part 6b of the cleaning sheet 1. FIG. As a result, the followability to the unevenness of the surface to be cleaned is improved, and the scraping performance of dust entering the gap can be improved. Further, the third fiber sheet 4 made of a paper material can prevent so-called “back-through” in which dust and dirt wiped off by the cleaning sheet 1 escape to the opposite side.

FIG. 8 is a schematic cross-sectional view of the cleaning sheet 1 in which the magnification at the time of joining the elastic member 5 is higher than that in the case of FIG. Also in FIG. 8, the second fiber sheet 3 is disposed on the side of the surface to be cleaned that captures dust.

As shown in FIG. 8, when the magnification at the time of joining the elastic member 5 is increased, the opening of the recess 6a of the cleaning sheet 1 is narrowed. As shown by a two-dot chain line in FIG. 8, the dust is trapped in the recess 6a from the opening and is not easily released to the outside of the recess 6a. That is, the dust capturing performance can be improved.

Moreover, when the elastic member 5 sprayed with the hot melt adhesive is joined to the third fiber sheet 4, a part of the hot melt adhesive soaks into the layer of the third fiber sheet 4, as shown in FIG. In addition, the adhesive penetrating portion Z is formed. Since this adhesive penetration portion Z is integrated with the hot melt adhesive on the circumferential surface of the elastic member 5, the adhesive penetration portion Z exhibits an anchoring action in joining the elastic member 5 and the third fiber sheet 4. The bonding between the elastic member 5 and the third fiber sheet 4 by the hot melt adhesive is made stronger. Thus, the anchor structure by the hot melt adhesive is formed on the third fiber sheet 4. Accordingly, a predetermined bonding strength can be obtained even when the amount of adhesive applied to the elastic member 5 is small, and the strength of the entire cleaning sheet 1 can be improved, and the cleaning sheet 1 having a high fastness can be provided. Furthermore, it is possible to avoid the elastic member 5 from being peeled off from joining with the first fiber sheet 2 or the third fiber sheet 4 and to prevent so-called “rubber omission”. In FIG. 9, the illustration of the adhesive applied between the second fiber sheet 3 and the third fiber sheet 4 is omitted.

In addition, since the cleaning sheet 1 includes the third fiber sheet 4 made of a paper material, the hot melt adhesive permeates the third fiber sheet 4, thereby causing the hot melt adhesive to the surface of the cleaning sheet 1. Bleeding can be prevented.

In addition, when liquid is present on the surface to be cleaned, when the cleaning sheet 1 wipes off the liquid, the third fiber sheet 4 made of paper material absorbs the liquid, and therefore, compared with the case where the third fiber sheet 4 is not present. Many liquids can be absorbed.

[Arrangement interval of plural elastic members 5]
Next, the interval at which the plurality of elastic members 5 are arranged will be described. The number of the elastic members 5 arranged on the cleaning sheet 1 can be arbitrarily set, and the arrangement interval of the elastic members 5 can also be arbitrarily set. When the interval between the elastic members 5 is wide, it is easy to capture large dust, and when the interval between the elastic members 5 is narrow, it is easy to scrape small dust that has entered the narrow gap and it is easy to capture small dust. For this reason, the arrangement interval of the elastic members 5 is preferably about 7 to 10 mm, for example.

FIG. 10 is a schematic diagram for explaining the arrangement intervals of the plurality of elastic members 5 arranged on the cleaning sheet 1. As the arrangement interval of the elastic members 5, any one of FIGS. 10A to 10E may be used, or any two or more of these may be combined.

FIG. 10A shows a state where the arrangement intervals of the elastic members 5 are made uniform, and FIG. 10B shows a state where the arrangement intervals of the elastic members 5 are repeated at two different intervals.

FIG. 10 (c) shows a state in which the arrangement interval of the elastic members 5 is narrower as it is closer to the side of the cleaning sheet 1 and is wider as it is closer to the center of the cleaning sheet 1. As described above, the closer to the side of the cleaning sheet 1, the narrower the interval between the elastic members 5, so that dust sandwiched between the gaps or corners can be easily scraped near the side of the cleaning sheet 1. On the other hand, the closer to the center of the cleaning sheet 1, the wider the interval between the elastic members 5, so that dust can be easily captured near the center of the cleaning sheet 1.

FIG. 10 (d) shows a state in which the arrangement interval of the elastic members 5 is increased as it is closer to the side portion of the cleaning sheet 1 and is decreased as it is closer to the center of the cleaning sheet 1. As described above, the closer to the side of the cleaning sheet 1, the wider the arrangement interval of the elastic members 5, so that dust can be easily captured near the side of the cleaning sheet 1. On the other hand, the closer to the center of the cleaning sheet 1, the narrower the spacing between the elastic members 5, thereby suppressing the reduction in dust capturing performance than the case where the spacing between the elastic members 5 is narrow near the side of the cleaning sheet 1. can do. This is because when the interval between the elastic members 5 is narrow, the amount of dust captured is small, and when the interval between the elastic members 5 is wide, the amount of dust captured is large.

FIG. 10E shows a state where the arrangement intervals of the elastic members 5 are all different (random).

In this way, by designing the arrangement of the elastic members 5 of the cleaning sheet 1 in consideration of the arrangement intervals of the plurality of elastic members 5, the dust scraping performance and the capturing performance of the cleaning sheet 1 can be improved. it can.

[Arrangement pattern of elastic member 5]
FIG. 11 is a schematic diagram for explaining an arrangement pattern of the plurality of elastic members 5 arranged on the cleaning sheet 1. 11A to 11J may be used as the arrangement pattern of the elastic member 5, or any two or more of these may be used in combination.

FIG. 11A shows a pattern in which a plurality of linear elastic members 5 are arranged in parallel at equal intervals. FIG. 11B shows a pattern in which a broken portion is provided in each of the linear elastic members 5 arranged in parallel at equal intervals. FIG.11 (c) shows the pattern in which the part disconnected by the arbitrary positions of the linear elastic member 5 arrange | positioned in parallel at equal intervals was provided.

FIG. 11D shows a pattern in which a plurality of elastic members 5 are arranged in parallel so as to be curved in an arc shape at equal intervals. FIG. 11E shows a pattern in which the elastic members 5 are arranged in a wave shape, and the elastic members 5 are arranged in a wave shape in which the phases of the adjacent elastic members 5 are reversed. FIG. 11F shows a pattern in which the elastic members 5 are arranged in a wave shape and the elastic members 5 are arranged so that the phases of the adjacent elastic members 5 are in the same phase.

FIG. 11G shows a pattern in which the elastic members 5 are arranged so that a plurality of one wave is formed at a predetermined interval, and the plurality of elastic members 5 are arranged in parallel.

FIG. 11 (h) shows a pattern in which the elastic members 5 are arranged obliquely and the elastic members 5 are arranged in a lattice pattern with respect to each side of the rectangular cleaning sheet 1. FIG. 11I shows a pattern in which the elastic members 5 are arranged in parallel to the sides of the rectangular cleaning sheet 1 and the elastic members 5 are arranged in a lattice shape.

FIG. 11 (j) shows a pattern in which a plurality of irregular wavy elastic members 5 are arranged.

In addition, when arrange | positioning the some elastic member 5, it is preferable to arrange | position each elastic member 5 by extending | stretching by the same magnification, However, You may arrange | position the elastic member 5 expanded by different magnification. Moreover, the thickness of the plurality of elastic members 5 may be the same, or some or all of the plurality of elastic members 5 may have different thicknesses.

[Manufacturing method of cleaning sheet 1]
FIG. 12 is a diagram illustrating a configuration of the cleaning sheet manufacturing apparatus 100 according to the first embodiment of the present invention. Hereinafter, the configuration of the cleaning sheet manufacturing apparatus 100 will be described with reference to FIG. Here, as the first fiber sheet 2 and the second fiber sheet 3, non-woven fabrics are used, and as the third fiber sheet 4, paper (non-hydrolyzed tissue) is used.

The 3rd fiber sheet 4 is wound around the 3rd fiber sheet winding body 101, and the 3rd fiber sheet 4 is drawn | fed out from the 3rd fiber sheet winding body 101. FIG.

The embossing roll 102 includes a pair of rolls, sandwiches the third fiber sheet 4 between the pair of rolls, and presses the third fiber sheet 4. Since the third fiber sheet 4 can be softened by this mechanical treatment, this treatment is referred to as a mechanical softening treatment. The mechanical softening process may be an embossing process using a flat roll or an embossing process using a meshing roll having a large number of protrusions on the roll surface. In the case of the latter embossing process, many fine holes are opened in the third fiber sheet 4.

The adhesive application unit 103 sprays the hot melt adhesive in the form of a mist on the third fiber sheet 4 that has been subjected to the embossing treatment.

On the other hand, the second fiber sheet 3 is wound around the second fiber sheet wound body 104, and the second fiber sheet 3 is fed out from the second fiber sheet wound body 104. In addition, the 2nd fiber sheet 3 drawn | fed out from the 2nd fiber sheet winding body 104 is a surface on the opposite side to the surface joined to the 3rd fiber sheet 4 (namely, surface equivalent to the surface of the cleaning sheet 1). Raising treatment may be performed.

The flat roll 105 includes a pair of rolls, and the second fiber sheet 3 fed out from the second fiber sheet wound body 104 and the third fiber sheet 4 coated with the hot melt adhesive are overlapped to overlap the pair of flat rolls 105. The sheet is pressed between the rolls and bonded together to form a bonding sheet PL1. In the formed joining sheet PL1, the second fiber sheet 3 and the third fiber sheet 4 are partially joined by spraying the hot melt adhesive onto the third fiber sheet 4 in the form of a mist.

A plurality of elastic members 5 are wound around the elastic member winding body 106 in parallel, and the plurality of elastic members 5 are fed out from the elastic member winding body 106. At this time, the elastic member 5 is pulled out so as to expand at a predetermined magnification.

The adhesive application unit 107 sprays a hot melt adhesive on the entire circumferential surface of the elastic member 5 fed out from the elastic member winding body 106.

The first fiber sheet 2 is wound around the first fiber sheet wound body 108, and the first fiber sheet 2 is fed out from the first fiber sheet wound body 108. In addition, the 1st fiber sheet 2 drawn | fed out from the 1st fiber sheet winding body 108 is a surface on the opposite side to the surface joined to the 3rd fiber sheet 4 (namely, surface equivalent to the back surface of the cleaning sheet 1). Raising treatment may be performed. The first fiber sheet 2 fed out from the first fiber sheet roll 108 is fed to the flat roll 109 while being overlapped with the joining sheet PL1 with the elastic member 5 coated with the hot melt adhesive interposed therebetween. At this time, the elastic member 5 is disposed on the third fiber sheet 4 side of the bonding sheet PL1.

The flat roll 109 includes a pair of flat rolls, and presses the elastic member 5 coated with a hot melt adhesive between the joining sheet PL1 and the first fiber sheet 2. Thereby, joining sheet PL1, elastic member 5, and the 1st fiber sheet 2 are laminated and joined, and a continuous cleaning sheet is formed.

Since the 1st fiber sheet 2 and the 3rd fiber sheet 4 are joined via the linear elastic member 5, it can be said that both are joined partially.

The embossing roll 110 includes a pair of rolls, sandwiches a continuous cleaning sheet fed from the flat roll 109 between the pair of rolls, and presses the continuous cleaning sheet. Thereby, the softness | flexibility of a cleaning sheet can further be improved. However, this embossing roll 110 is not necessarily required and may be omitted from the cleaning sheet manufacturing apparatus 100.

The cutting unit 111 cuts the continuous cleaning sheet fed from the embossing roll 110 into a predetermined length in the MD (Machine Direction) direction (corresponding to the x direction in FIG. 1) of the cleaning sheet manufacturing apparatus 100. By this cutting, the elastic member 5 that has been stretched by the pulling force is released from the stretched state and contracts by the contracting force. At this time, since the elastic member 5 also contracts the first fiber sheet 2, the second fiber sheet 3, and the third fiber sheet 4, uneven unevenness is formed on the cleaning sheet 1. Note that the cut cleaning sheet 1 may be packed with a chemical added thereto.

[About drugs]
As a chemical | medical agent, what contains at least 1 or more among mineral oil, synthetic oil, silicone oil, surfactant, and a synthetic resin is mentioned.

As the mineral oil, paraffinic hydrocarbons, naphthenic hydrocarbons, aromatic hydrocarbons and the like are used. As the synthetic oil, alkylbenzene oil, polyolefin oil, polyglycol oil or the like is used. As the silicone oil, chain dimethylpolysiloxane, cyclic dimethylpolysiloxane, methylhydrogen polysiloxane, various modified silicones, or the like is used. These may be used alone or in combination of two or more.

As for the surfactant, as a cationic system, a mono long chain alkyltrimethylammonium salt having an alkyl group or an alkenyl group having 10 to 22 carbon atoms, a dilong chain alkyldimethylammonium salt, a monolong chain alkyldimethylbenzylammonium salt, etc. Nonionic systems include polyoxyethylene (6-35 mol) long chain alkyl or alkenyl (primary or secondary C8-C22) ether, polyoxyethylene (6-35 mol) alkyl (C8 C18) Polyethylene glycol ether type such as phenyl ether, polyoxyethylene polyoxypropylene block copolymer, or polyhydric alcohol type such as glycerin fatty acid ester, sorbitan fatty acid ester, alkylglycoside, anionic type and amphoteric type. These may be used alone or in combination of two or more.

Synthetic resins include water-based acrylic resin, acrylic-urethane copolymer resin, acrylic-styrene copolymer resin, polyurethane resin, polyester resin, polystyrene resin, polyvinyl acetate resin, polyvinyl chloride resin, polyamide resin, silicone resin, A phenol resin, a novolac resin, a xylene resin, a melamine resin, etc. can be mentioned. These synthetic resins are usually used as an aqueous emulsion or aqueous dispersion. These may be used alone or in combination of two or more.

Among these drugs, it is particularly preferable to use liquid paraffin. At this time, 3 to 5% by weight of liquid paraffin of the cleaning sheet 1 is preferably added to the cleaning sheet 1. Thereby, since a chemical | medical agent adsorb | sucks dust, the capture | acquisition performance of dust can be improved more. In addition, the cleaning sheet 1 has a third fiber sheet 4 (mainly paper) containing a cellulosic material in particular, so that the third fiber sheet 4 impregnated with the drug serves as a cleaning surface. It is possible to continue supplying the medicine to 3 efficiently. Further, even when a chemical such as liquid paraffin is added to the cleaning sheet 1, the liquid is wiped off using the cleaning sheet 1 due to the presence of the third fiber sheet 4 (mainly paper) containing a cellulosic material. Sometimes, the third fiber sheet 4 can absorb the liquid.

It should be noted that deodorants, fragrances, antibacterial agents, polishes, etc. may be used as other drugs. In this case, when the cleaning sheet 1 has the third fiber sheet 4 (mainly paper) containing a cellulosic material, the fixing rate of a fragrance or the like can be increased.

Deodorizers include catechins, epigallocatechins, gallocatechins, epicatechin gallate, epigallocatechin galade, gallotannins, ellagitannins; iron-ascorbic acid chelate compounds; zirconium, which are extracts from plants such as catechins and tannins Lanthanoid hydroxides; metal salts such as Zn, Cu, and Fe (for example, ZnSO ₄ ). Further, as a deodorant having an adsorbing action, for example, activated carbon; zeolite; silica; ceramic; Otani stone; charcoal polymer; carbon nanotube; carbon nanohorn; organic acid such as citric acid and succinic acid; Inorganic acids such as acids; ion exchangers; nucleophiles such as anions, ammonia, amines, alkenes, alkynes, aromatics; electrophiles such as cations, boron fluoride, aluminum chloride, iron bromide, zinc chloride, and acetone Agents and the like. These may be used alone or in combination of two or more.

Perfumes include fruits such as orange, lemon, lime and peach; flowers such as roses and lavender; essential oils such as mint and sandalwood (plants). Usually, the fragrance component is oily or water-alcohol soluble. Examples of oily fragrances include phenylethyl alcohol, linalool, jasmon, hexylcinnamic aldehyde, α-limonene, α-pinene, bromostyrol, citronellal, corral, terpionol, menthol, cinnamic acid, and the like. These may be used alone or in combination of two or more.

As the antibacterial material, an antibacterial carbendazim derivative or the like can be used.

[Effect of Embodiment 1]
Thus, according to Embodiment 1, between the 1st fiber sheet 2 and the 2nd fiber sheet 3, the 3rd fiber sheet 4 which consists of a material containing a cellulose component, and the extended elastic member 5 are made. When the elastic member 5 is released from the stretched state, the cleaning sheet 1 sandwiched and joined forms an uneven surface on the surface of which the recesses 6a and the protrusions 6b are alternately continued due to the contraction force of the elastic member 5. As a result, the convex portion 6b of the cleaning sheet 1 can easily follow the irregularities of the surface to be cleaned, improving the dust scraping performance, and the concave portion 6a of the cleaning sheet 1 traps the dust. To improve. Furthermore, manufacturing cost can be restrained low by making the cleaning sheet 1 into a simple structure.

The cleaning sheet 1 includes the third fiber sheet 4 made of a material containing a cellulosic component, thereby improving the followability to the unevenness of the surface to be cleaned, improving the rigidity of the cleaning sheet 1, and removing dust and dirt to the back side. Various effects such as prevention of water, improvement of water absorption or water retention can be obtained.

In addition, you may give the further process to the cleaning sheet 1 in this embodiment. FIG. 13 is a schematic diagram for explaining processing applied to the cleaning sheet 1. As shown in FIG. 13, the cleaning sheet 1 may be embossed to give an embossed shape 15. Further, the cleaning sheet 1 may be cut to form slits such as the linear slit 16, the S-shaped slit 17, or the C-shaped slit 18. Furthermore, the cleaning sheet 1 may be drilled to provide a through hole 19. Thereby, a further uneven unevenness can be formed on the uneven surface of the cleaning sheet 1, the surface area per unit volume can be increased, and the dust capturing performance can be further improved. Further, as a process other than the above, the cleaning sheet 1 may be joined between adjacent elastic members 5 by heat sealing in parallel with the elastic members 5. Thereby, the heat-sealed part does not expand, and the cleaning sheet 1 as a whole can easily form uneven uneven surfaces.

In addition, in this embodiment, although the case where it cleaned mainly using the 2nd fiber sheet 3 was demonstrated, this invention is not limited to this, The cleaning sheet 1 is turned over and it cleans using the 1st fiber sheet 2 May be.

Moreover, although this embodiment demonstrated the case where a mesh-like nonwoven fabric was used as the 2nd fiber sheet 3, this invention is not restricted to this, At least any one of the 1st fiber sheet 2 and the 2nd fiber sheet 3 is used. It is good also as a mesh-like nonwoven fabric.

Further, in the present embodiment, two cleaning sheets 1 described above may be prepared, and the first fiber sheets 2 may be bonded together to form a cleaning sheet that can be used on both sides.

In the present embodiment, the second fiber sheet 3, the third fiber sheet 4, the elastic member 5, and the first fiber sheet 2 are described as being laminated, but the present invention is not limited to this. For example, the second fiber sheet 3, the third fiber sheet 4, the elastic member 5, the third fiber sheet 4, and the first fiber sheet 2 may be laminated in this order to form a cleaning sheet that can be used on both sides.

[Wet type cleaning sheet]
Although the dry type cleaning sheet has been described in the present embodiment, the present invention is not limited to this. That is, the cleaning sheet 1 may be a wet type.

The wet type cleaning sheet 1 is impregnated with a chemical. Examples of this agent include surfactants and baking soda. Moreover, chemical | medical agents, such as a disinfectant and a fragrance | flavor, may be added to these chemicals.

In the wet type cleaning sheet 1, since the third fiber sheet 4 made of a paper material having high water retention holds the medicine, the medicine consumed with the cleaning is efficiently supplied to the first fiber sheet 2 or the second fiber sheet 3. And it can continue to be supplied in the long term.

In addition, also in the wet type cleaning sheet 1, only one side may be used or both sides may be used. When using both surfaces, as described above, two cleaning sheets 1 may be prepared, and the first fiber sheets 2 may be bonded together, or the second fiber sheet 3, the third fiber sheet 4, and the elastic member. 5, the third fiber sheet 4 and the first fiber sheet 2 may be laminated in this order.

In the present embodiment, the cleaning sheet 1 has been described as including the third fiber sheet 4. However, the present invention is not limited to this, and the cleaning sheet may not include the third fiber sheet 4. In this case, the embodiment will be described again.

(Embodiment 2)
FIG. 14 is a schematic cross-sectional view of the cleaning sheet 20 according to Embodiment 2 of the present invention. The cleaning sheet 20 has a configuration in which a fourth fiber sheet 21 and a fifth fiber sheet 22 are added to the cleaning sheet 1 shown in the first embodiment. In this embodiment, the cleaning sheet 1 is described as a laminated sheet 1a for convenience.

The fourth fiber sheet 21 is a fiber sheet mainly made of a material containing a cellulosic component, for example, an airlaid nonwoven fabric. Hereinafter, the 4th fiber sheet 21 is demonstrated as an airlaid nonwoven fabric. The raw material of the fourth fiber sheet 21 can be the same as the raw material of the third fiber sheet 4.

The convex portion 6b of the laminated sheet 1a is joined to the fourth fiber sheet 21. For this joining, a hot melt adhesive applied by spraying is used. The 4th fiber sheet 21 functions as a base material sheet which fixes lamination sheet 1a. However, it is not necessary for all the convex portions 6 b of the laminated sheet 1 a to be joined to the fourth fiber sheet 21.

The fifth fiber sheet 22 is a non-woven fabric, and is bonded to the surface opposite to the surface where the laminated sheet 1a of the fourth fiber sheet 21 is bonded. Thereby, scattering of the paper powder from the airlaid nonwoven fabric which is the 4th fiber sheet 21 can be prevented.

By having the said structure, as for the cleaning sheet 20, the convex part 6b in the lamination sheet 1a is joined and fixed to the 4th fiber sheet 21, and a space is formed between the 4th fiber sheet 21 and the lamination sheet 1a. . By this space, the degree of freedom of movement of the convex portion 6b protruding toward the surface to be cleaned increases, and the followability to the unevenness of the surface to be cleaned is improved. Moreover, since this space contributes to the cleaning sheet 20 retaining moisture, the water absorption or water retention of the cleaning sheet 20 is improved.

Moreover, in this embodiment, the two laminated sheets 1a mentioned above may be prepared, and as shown in FIG. 15, the 1st fiber sheet 2 may be joined to each both surfaces of the 4th fiber sheet 21 by the convex part 6b. . In this case, the cleaning sheet can be used on both sides.

In the present embodiment, the cleaning sheet 20 has been described as having the first fiber sheet 2, but the present invention is not limited to this, and the first fiber sheet 2 may not be provided.

Further, the cleaning sheet 20 in the present embodiment may be a dry type cleaning sheet or a wet type cleaning sheet. In particular, when the cleaning sheet 20 is a wet type cleaning sheet, the air-laid nonwoven fabric that is the fourth fiber sheet 21 is excellent in water retention performance, so the fourth fiber sheet 21 impregnated with the drug is consumed with cleaning. It is possible to continue supplying the medicine to the second fiber sheet 3 efficiently and in the long term.

In the present embodiment, the air-laid nonwoven fabric is described as an example of the base sheet, but the present invention is not limited to this. For example, a film sheet may be used as the base sheet, and in this case, the fifth fiber sheet can be omitted from the configuration shown in FIG. As the film sheet, in order to fix the laminated sheet 1a, it is preferable to use a sheet having almost no elasticity. For example, as the film sheet, a moisture-permeable film that transmits water vapor but does not transmit liquid can be used.

(Embodiment 3)
In the present embodiment, a case where a paper material is used for the third fiber sheet 4 in each embodiment described above and printing is performed on the third fiber sheet 4 will be described in detail.

Since the third fiber sheet 4 uses a paper material, a print layer 4a can be formed as shown in FIGS. As shown in FIG. 5, the print layer 4 a is formed on the surface of the third fiber sheet 4 that faces the second fiber sheet 3.

According to the embodiment of the present invention, since the third fiber sheet 4 made of paper material is printed instead of printing on the nonwoven fabric, a clear picture can be printed easily and efficiently. Thereby, various designs and messages can be expressed efficiently and effectively. In particular, the design and pattern to be printed, the selection of the nonwoven fabric used for the second fiber sheet 3, the formation method of the adhesive layer 7 and the like are appropriately selected to provide a cleaning sheet with high design and aesthetics as a whole. be able to. Examples of the design and pattern to be printed on the third fiber sheet 4 include a pattern, a color, a pattern, a photograph, and the like (hereinafter referred to as “a pattern or the like”).

Examples of the printing method include techniques such as inkjet printing, flexographic printing, and gravure printing. Further, the surface of the printing layer 4a may be subjected to a color fading prevention process, for example, by performing a varnishing process or adding a binder. Examples of the binder include known materials such as PVA (polyvinyl alcohol), CMC (carboxymethylcellulose), EVA (ethylene / vinyl acetate copolymer), acrylic, and lacquer. Ink that has been subjected to color fading prevention treatment can also be used.

The printing layer 4a is preferably formed by flexographic printing. Flexographic printing has advantages such as a small contact area between the plate and the third fiber sheet 4 and a low printing pressure. For this reason, it is easy to peel the 3rd fiber sheet 4 from a plate, and when the thickness of the 3rd fiber sheet 4 is thin especially, it is suitable for forming the printing layer 4a. In flexographic printing, there are many types of ink that can be used, and in this respect, it is less affected by ink viscosity and the like than ink jet printing in which ink is ejected through a nozzle or the like.

The pattern or the like printed by the plate on the printing layer 4a is printed as a pattern or the like of a stretched design in accordance with the state in which the cleaning sheet is stretched in the expansion / contraction direction of the elastic member 5 (the x direction in FIG. 1). When the stretched state of the elastic member 5 is released, a design or the like of the original intended design (design not stretched) is displayed. In this case, the stretch rate in the x direction (see FIG. 1 and the like) of the printed pattern or the like is determined by the magnification by which the elastic member 5 is stretched. For example, the length in the x direction of the design of the original intended design (design not stretched) can be enlarged by 1.1 to 3.5 times and printed.

By embossing the third fiber sheet 4 to form a plurality of recesses and projections, a three-dimensional pattern or the like can be displayed on the printed layer 4a, and a pattern or the like having a different design can be expressed depending on the viewing angle. it can. Further, as shown in FIG. 5, there are a print layer 4 a located in a space formed by the non-adhesive portion 8 and a print layer 4 a formed at a position covered with the adhesive layer 7. The combination of 4a can make the design appearing in the appearance rich in change. When the area ratio of the space with respect to the cleaning sheet is large, the printed layer 4a appearing on the appearance is visually recognized as being blurred, and when the area ratio of the space with respect to the cleaning sheet is small, the printed layer 4a appearing on the appearance is clearly visible. The

Since the printing layer 4a is visually recognized from the outside through the second fiber sheet 3, various designs and messages can be efficiently and effectively expressed in the cleaning sheet 1. It is preferable to use a non-woven fabric as the second fiber sheet 3 so that the printed layer 4a can be accurately recognized from the outside and has aesthetic properties.

(Embodiment 4)
In each said embodiment, the cleaning sheet which has a 3rd fiber sheet which consists of a material containing a cellulose-type component was demonstrated to the example. This embodiment demonstrates the cleaning sheet which does not have a 3rd fiber sheet. The cleaning sheet according to the present embodiment is a laminated sheet in which the first fiber sheet 2, the elastic member 5, and the second fiber sheet 3 are laminated. In addition, the cleaning sheet according to the present embodiment is formed by embossing between a plurality of elastic members to form a linear groove parallel to the expansion / contraction direction of the elastic member 5.

The cleaning sheet manufacturing apparatus according to Embodiment 4 of the present invention has a configuration in which the third fiber sheet wound body 101 that feeds out the third fiber sheet 4 is removed from the configuration illustrated in FIG. 12, and the configuration of the embossing roll 110. Is different. In FIG. 16, the structure of the embossing roll 120 which concerns on Embodiment 4 of this invention is shown typically.

One of the embossing rolls 120 is a protruding roll and the other is a flat roll. The projecting roll has a plurality of projecting portions projecting from the peripheral surface in the normal direction by a predetermined height over one circuit. The protrusions press between the adjacent elastic members 5 when pressing the cleaning sheet. Both embossing rolls 120 may be protruding rolls.

By passing the cleaning sheet through the embossing roll 120, a linear groove g1 is formed between the adjacent elastic members 5 in the cleaning sheet. Thereby, the number of the unevenness | corrugation formed in the cleaning sheet can be increased, and an uneven surface can be made finer and complicated. As a result, it becomes easy to trap various sizes of dust, and the trapping performance can be improved. Further, the number of elastic members 5 can be reduced, and the manufacturing cost can be reduced.

In addition, the position of the groove | channel g1 formed between the elastic members 5 of a cleaning sheet does not need to be equidistant from the adjacent elastic member 5, and it is preferable that the distance from the adjacent elastic member 5 is non-uniform | heterogenous. . Thereby, the uneven surface formed in the cleaning sheet is also non-uniform, it becomes easy to capture dust of various sizes, and the capturing performance can be improved.

Also, the cleaning sheet may be heat-treated after the embossing roll. Since the degree of shrinkage of each part constituting the cleaning sheet is different when cooled by heat treatment, the uneven surface formed on the cleaning sheet can be made more uneven.

(Embodiment 5)
FIG. 17 is an enlarged view of the cleaning sheet 30 according to the fifth embodiment of the present invention. 18 is a schematic sectional view of the cleaning sheet 30 shown in FIG. Hereinafter, the configuration of the cleaning sheet 30 will be described with reference to FIGS. 17 and 18.

The cleaning sheet 30 is a laminated sheet in which the first fiber sheet 2, the elastic member 5, and the second fiber sheet 3 are laminated. The second fiber sheet 3 is a mesh-like nonwoven fabric provided with an infinite number of holes that can be visually recognized by the naked eye. However, the size of the hole is not limited to this. Examples of such a nonwoven fabric include a spunlace nonwoven fabric.

Also, the first fiber sheet 2 and the second fiber sheet 3 are each subjected to stretching treatment, and the bond between the fibers is broken. Thereby, the 1st fiber sheet 2 and the 2nd fiber sheet 3 can be made flexible, and can be raised.

The first fiber sheet 2 and the second fiber sheet 3 may be the same nonwoven fabric or different nonwoven fabrics. The different non-woven fabrics referred to here are non-woven fabrics of the same type, but also include those with different basis weights, processing, etc.

The cleaning sheet 30 is formed by sandwiching an elastic member 5 in which a hot melt adhesive is applied to the entire circumferential surface by spraying or the like between the first fiber sheet 2 and the second fiber sheet 3. Thereby, the hot melt adhesive does not leak out from the holes of the first fiber sheet 2 and the second fiber sheet 3 to the surface of the cleaning sheet 30.

In the cleaning sheet 30, a hot melt adhesive is applied to at least one of the first fiber sheet 2 and the second fiber sheet 3 by spraying or the like, and between the first fiber sheet 2 and the second fiber sheet 3. The elastic member 5 may be interposed therebetween.

Thus, by using a mesh-like nonwoven fabric for the second fiber sheet 3, the basis weight can be reduced and the raw material cost can be reduced. Moreover, since dust can be trapped in countless holes in the mesh shape, dust trapping performance can be improved.

In addition, you may fix the cleaning sheet which concerns on the said Embodiment 4 and this Embodiment 5 to the base material sheet demonstrated in Embodiment 2. FIG. Moreover, although this embodiment demonstrated the case where a mesh-shaped nonwoven fabric was used as the 2nd fiber sheet 3, this invention is not restricted to this, At least any one of the 1st fiber sheet 2 and the 2nd fiber sheet 3 is used. What is necessary is just a mesh-shaped nonwoven fabric.

(Embodiment 6)
FIG. 19 is an external perspective view showing a cleaning sheet 40 according to Embodiment 6 of the present invention. The cleaning sheet 40 is obtained by processing the cleaning sheet described in any of the first to fifth embodiments.

The bag-shaped cleaning sheet 40 is formed as follows. First, the rectangular cleaning sheet 40 is folded so that both long sides are located on the same surface at a predetermined length from both long sides. At this time, the folded long sides are folded so as to leave a predetermined interval. As for the cleaning sheet 40, the overlap of the short side vicinity produced by being folded is joined. Thereby, the bag-shaped cleaning sheet 40 partially opened is formed.

While pulling the bag-shaped cleaning sheet 40, the cleaning tool 40 is attached to the cleaning tool body 11 so that the bottom of the cleaning tool body 11 is inserted through the opening of the cleaning sheet 40. Thereby, the cleaning sheet 40 can be easily attached to the cleaning tool body 11 without using the fixing portion 14 of the cleaning tool body 11.

The cleaning sheet 40 can be used on both sides by turning it over.

(Embodiment 7)
FIG. 20 is a schematic cross-sectional view of a cleaning sheet 50 according to Embodiment 7 of the present invention. The cleaning sheet 50 has a configuration in which the first fiber sheet 2 is changed to the third fiber sheet 4 and the second fiber sheet 3 is deleted in the cleaning sheet 1 shown in the first embodiment.

As shown in FIG. 20, the cleaning sheet 50 is a laminated sheet in which the third fiber sheet 4, the elastic member 5, and the third fiber sheet 4 are laminated in this order. The two third fiber sheets 4 are joined to each other via the elastic member 5. Specifically, a hot melt adhesive is applied to the peripheral surface of the elastic member 5 to form an adhesive layer 7, and the elastic member 5 is joined to the two third fiber sheets 4. At this time, the adhesive penetration portion Z as shown in FIG. 9 is formed in the third fiber sheet 4. The adhesive penetrating portion Z exhibits an anchoring action in the joining between the elastic member 5 and the third fiber sheet 4 and further strengthens the joining between the elastic member 5 and the third fiber sheet 4 by the hot melt adhesive.

Also in the cleaning sheet 50, when the elastic member 5 is stretched at a predetermined magnification to be joined to the third fiber sheet 4 and the stretched state of the elastic member 5 is released, the elastic member 5 contracts to the cleaning sheet 50. Forms a non-uniform concavo-convex surface in which concave and convex portions are alternately repeated.

The cleaning sheet 50 in this embodiment may be a dry type cleaning sheet or a wet type cleaning sheet. In particular, when the cleaning sheet 50 is a wet type cleaning sheet, the third fiber sheet 4 made of a material containing a cellulosic component is excellent in water retention performance, so that it is consumed with cleaning by impregnating the agent. The drug can be supplied efficiently and in the long term.

Further, since the cleaning sheet 50 has fine fibers of the third fiber sheet 4 made of a material containing a cellulose-based component, adhesion to the surface to be cleaned is improved, and dust capturing performance is improved. In particular, when the cleaning sheet 50 is a wet type cleaning sheet, the third fiber sheet 4 becomes soft when it contains moisture, so that adhesion to the surface to be cleaned is further improved, and dust capturing performance is further improved.

In addition, also in the cleaning sheet 50, only one side may be used and both sides may be used.

When an air laid nonwoven fabric is used as the third fiber sheet 4, a density gradient of pulverized pulp is formed in the thickness direction of the third fiber sheet 4 due to the manufacturing method of the air laid nonwoven fabric. A cleaning sheet 50 may be formed in which a surface having a low density is a cleaning surface and the other third fiber sheet 4 is a surface having a high density of pulverized pulp. In addition, even if one third fiber sheet 4 forms a cleaning sheet 50 having a surface with a low density of pulverized pulp as a cleaning surface, and the other third fiber sheet 4 also has a surface with a low density of pulverized pulp as a cleaning surface. In addition, one third fiber sheet 4 may include a cleaning sheet 50 having a surface having a high density of pulverized pulp as a cleaning surface, and the other third fiber sheet 4 having a surface having a high density of pulverized pulp as a cleaning surface. You may form.

The surface with high density of pulverized pulp is hard compared to the low surface, so it can be said that it is suitable for the surface with less unevenness such as flooring as the surface to be cleaned. The surface with low density of pulverized pulp is softer than the surface with high density. It can be said that the surface to be cleaned is suitable for a surface with many irregularities such as tatami mats.

Japanese application for Japanese Patent Application No. 2016-131004 filed on June 30, 2016, Japanese application for Japanese Patent Application No. 2016-137154 filed on July 11, 2016, and Japanese Patent Application No. 2017-026310 filed on February 15, 2017 The disclosures of the specification, drawings and abstract contained in the Japanese application of No. are all incorporated herein by reference.

DESCRIPTION OF SYMBOLS 1, 20, 30, 40, 50 Cleaning sheet 2 1st fiber sheet 3 2nd fiber sheet 4 3rd fiber sheet 5 Elastic member 6a Concave part 6b Convex part 7 Adhesive layer 8 Non-adhesive part 10 Cleaning tool 11 Cleaning tool main body 12 Head Part 13 Pattern 14 Fixing part 100 Cleaning sheet manufacturing apparatus 101 3rd fiber sheet winding body 102,110,120 Embossing roll 103,107 Adhesive application part 104 2nd fiber sheet winding body 105,109 Flat roll 106 Elastic member winding Rotating body 108 1st fiber sheet winding body 111 Cutting part 21 4th fiber sheet 22 5th fiber sheet

Claims (13)

1. A first fiber sheet;
   A second fiber sheet made of a material containing a cellulosic component;
   An elastic member that is laminated with the first fiber sheet and the second fiber sheet, and contracts the first fiber sheet and the second fiber sheet;
   Comprising
   An uneven surface was formed,
   Cleaning sheet.
2. The elastic member is bonded to a surface of the second fiber sheet opposite to the surface on which the first fiber sheet is laminated, and imparts a shrinkage force to the first fiber sheet and the second fiber sheet.
   The cleaning sheet according to claim 1.
3. The elastic member is bonded to the second fiber sheet by an applied adhesive.
   The cleaning sheet according to claim 2.
4. The first fiber sheet and the second fiber sheet are partially joined.
   The cleaning sheet according to claim 1.
5. Further comprising a third fiber sheet laminated with the second fiber sheet via the elastic member;
   The cleaning sheet according to claim 1.
6. The elastic member is partially bonded to the second fiber sheet and the third fiber sheet by an applied adhesive.
   The cleaning sheet according to claim 5.
7. A base sheet for fixing the contracted first fiber sheet and the second fiber sheet;
   The cleaning sheet according to claim 1.
8. The substrate sheet is an airlaid nonwoven fabric or a film sheet,
   The cleaning sheet according to claim 7.
9. A non-woven first fiber sheet and a second fiber sheet, at least one of which is mesh-shaped,
   An elastic member that is laminated between the first fiber sheet and the second fiber sheet, and contracts the first fiber sheet and the second fiber sheet;
   Comprising
   By the adhesive applied to the elastic member, the first fiber sheet and the second fiber sheet are joined via the elastic member.
   Cleaning sheet.
10. The first fiber sheet and the second fiber sheet were stretched,
    The cleaning sheet according to claim 9.
11. A base sheet for fixing the contracted first fiber sheet and the second fiber sheet;
    The cleaning sheet according to claim 9.
12. The substrate sheet is an airlaid nonwoven fabric or a film sheet,
    The cleaning sheet according to claim 11.
13. The first fiber sheet is made of a material containing a cellulosic component.
    The cleaning sheet according to claim 1.

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