Deposit removal sheet

Abstract

To provide a technique capable of removing stain while suppressing a scratch on a surface of an object to be wiped.SOLUTION: A deposit removal sheet includes: a base material sheet having a wiping surface for wiping a deposit on a surface of an object to be wiped; a cleaning agent containing a melting agent that melts the deposit on the surface of the object to be wiped to form a crack in the deposit, water being a solvent of the melting agent, and a volatile agent; and a protrusion provided in the wiping surface of the base material sheet and fittable to the crack.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to an attachment removal sheet.

Background Art

[0002] Conventionally, cleaning sheets for removing dirt such as scale have been known. Patent Document 1 discloses an abrasive sheet for removing scale.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When using an abrasive sheet to remove dirt on the surface of the object to be wiped, there is a risk of scratching the surface of the object to be wiped.

[0005] An object of the present invention is to provide a technique capable of removing dirt while suppressing scratching of the surface of the object to be wiped.

Means for Solving the Problems

[0006] An attachment removal sheet according to one aspect of the present invention includes a base sheet having a wiping surface for wiping off attachments on the surface of the object to be wiped, a cleaning agent containing a melting agent that forms cracks in the attachment by melting the attachment on the surface of the object to be wiped, water that is a solvent of the melting agent, and a volatile agent, protrusions provided on the wiping surface of the base sheet and capable of fitting into the cracks, and.

Effects of the Invention

[0007] According to the present invention, it is possible to remove dirt while suppressing damage to the surface of the object to be wiped.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

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Figure 7

Figure 8

Modes for Carrying Out the Invention

[0009] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the configurations of the following embodiments are examples, and the present invention is not limited to the configurations of these embodiments. Note that the description of "X to Y" representing a numerical range means a numerical range including the lower limit and the upper limit which are the endpoints, unless otherwise specified.

[0010] <Embodiment 1> FIG. 1 is a plan view showing an adherent removing sheet 1 according to Embodiment 1. FIG. 2 is a cross-sectional view when the adherent removing sheet 1 is cut along line AA in FIG. 1. As shown in FIGS. 1 and 2, the adherent removing sheet 1 according to the present embodiment has a base sheet S formed by laminating two nonwoven fabric sheets S1 and S2. The base sheet S has a rectangular shape. The nonwoven fabric sheet S1 forming the base sheet S has a wiping surface 10 for wiping off adherents (for example, scale, rust, etc.) of the object to be wiped on the front surface side, and the nonwoven fabric sheet S2 is joined to the back surface side.

[0011] For the nonwoven fabric sheets S1 and S2, various nonwoven fabrics such as spunlace nonwoven fabric, meltblown nonwoven fabric, chemical bonded nonwoven fabric, thermal bonded nonwoven fabric, needle punched nonwoven fabric, stitch bonded nonwoven fabric, airlaid nonwoven fabric, and spunbond nonwoven fabric can be used. In the present embodiment, a particularly preferable nonwoven fabric is a spunlace nonwoven fabric. The spunlace nonwoven fabric has high strength, is easy to emboss, and is easy to impregnate with a cleaning agent containing a melting agent. Also, meltblown nonwoven fabric, chemical bonded nonwoven fabric, thermal bonded nonwoven fabric, needle punched nonwoven fabric, and stitch bonded nonwoven fabric can also be preferably used. Note that the airlaid nonwoven fabric is not preferable for the use of wiping and cleaning to remove adherents because of its low strength, and the meltblown nonwoven fabric is not preferable because it is difficult to impregnate with a cleaning agent, but the airlaid nonwoven fabric and the meltblown nonwoven fabric can also be used.

[0012] The adherent removing sheet 1 can be preferably used to remove scale adhering to the surface of glass or the like. Hereinafter, the adherent removing sheet 1 suitable for removing scale in the form of flakes will be described.

[0013] Scale is a stain in which calcium carbonate contained in tap water adheres to the glass surface or the like in the form of flakes. Tap water scattered in the sink, washbasin, or bathroom in the home is left standing, the moisture in the tap water evaporates, and calcium carbonate remains, which becomes scale and adheres to the surface of glass or stainless steel. The base sheet S contains a cleaning agent capable of dissolving calcium carbonate.

[0014] The cleaning agent contains a melting agent that forms cracks in the water scale by melting calcium carbonate contained in the water scale, water that is a solvent for the melting agent, and a volatile agent. As the melting agent, citric acid, sodium citrate, fruit acids (malic acid, tartaric acid, grapefruit seed extract, limonene), sodium citrate, etc. can be used. Water is a solvent for the melting agent. In this embodiment, ion-exchanged water obtained by removing impurities from tap water using an ion-exchange resin is used as the solvent. The volatile agent is contained to volatilize the water adhering to the surface of the object to be wiped when the surface of the object to be wiped is wiped with the attachment removal sheet 1. In this embodiment, the volatile agent is ethanol. The amount of the melting agent necessary to form cracks in the water scale is added, the amount of water necessary to contain the necessary melting agent is added, and the amount of the volatile agent necessary to volatilize the water adhering to the surface of the object to be wiped is added. These specific blending ratios will be described later.

[0015] Also, as shown in FIGS. 1 and 2, the attachment removal sheet 1 includes convex portions 11 provided on the wiping surface 10 of the base material sheet S. As shown in FIG. 1, a plurality of convex portions 11 are arranged in a matrix. The arrangement pattern of the convex portions 11 may be a regular pattern such as a staggered pattern or may be irregular.

[0016] As shown in FIG. 2, recesses 12 are formed on the back side of the wiping surface 10 of the base material sheet S. Taking the wiping surface 10 as the front surface and its back side as the back surface, convex portions 11 are formed on the front surface, and recesses 12 are formed on the back side of the convex portions 11. The convex portions 11 and the recesses 12 are formed by embossing the base material sheet S. The attachment removal sheet 1 according to this embodiment is created by laminating non-woven fabric sheets S1 and S2 to form the base material sheet S, embossing the base material sheet S to form the convex portions 11 and the recesses 12, and containing a cleaning agent in the base material sheet S.

[0017] The convex portion 11 is formed to have a size that can fit into the cracks formed in the water scale by melting calcium carbonate contained in the water scale with a melting agent. For example, when viewed from above, the convex portion 11 is circular, with a width of 2.0 mm to 4.0 mm and a height of 0.5 mm to 1.5 mm. Also, the interval between the plurality of convex portions is 1.0 mm to 2.0 mm.

[0018] Next, the principle of removing water scale by the deposit removal sheet 1 according to the present embodiment will be described. The deposit removal sheet 1 dissolves a part of the water scale by the first wiping operation on the surface of the object to be wiped, and forms cracks in the water scale. Then, the volatile agent volatilizes the water adhering to the surface of the water scale, and the second wiping operation by the deposit removal sheet 1 is performed in a state where the deposit removal sheet 1 is less likely to slide on the water scale surface. By this second wiping operation, the convex portion 11 that fits into the cracks of the water scale and the convex portion 11 that adheres to the water scale surface move the flaky water scale from the surface of the object to be wiped and can wipe it off. Since the water adhering to the surface of the water scale is volatilized by the volatile agent, the coefficient of static friction between the convex portion 11 that adheres to the water scale surface and the water scale surface can be increased, whereby the water scale can be easily peeled off from the surface of the object to be wiped by the convex portion 11. Also, since the deposit removal sheet 1 does not contain an abrasive and removes the water scale by the cleaning agent and the convex portion 11, the water scale can be removed while suppressing damage to the surface of the object to be wiped. The water scale can be removed by a wiping operation in which the surface of the object to be wiped is reciprocated using the deposit removal sheet 1.

[0019] Also, the deposit removal sheet 1 according to the present embodiment is adjusted to be weakly acidic with a pH of 2.7 or more. Specifically, the pH of the deposit removal sheet is 4.0 to 6.0. Therefore, the user can handle the deposit removal sheet without using protective means such as rubber gloves or protective glasses.

[0020] In addition, the scale in the form of flakes adheres to the surface of the object to be wiped in an irregular arrangement pattern, and the cracks formed in the scale by the first wiping operation with the attachment removal sheet 1 also occur in an irregular arrangement pattern. Therefore, it is difficult to form the convex portions 11 at intervals synchronized with the cracks on the wiping surface 10 of the attachment removal sheet 1. In the attachment removal sheet 1 according to the present embodiment, at least one of the plurality of convex portions 11 is aligned with the cracks, and the other convex portions 11 contact the scale surface in a state where the static friction coefficient is high, so that the scale can be relatively moved from the surface of the object to be wiped by the second wiping operation, and the scale can be wiped off.

[0021] <Example> Next, an example of Embodiment 1 will be described. In this example, malic acid was used as the melting agent. Note that, as the melting agent, at least one or more of malic acid, citric acid, grapefruit seed extract, tartaric acid, and acetic acid can be used. Malic acid, citric acid, grapefruit seed extract, tartaric acid, and acetic acid are the above-mentioned melting agents and are acidic components in the cleaning agent. As the dosage of the cleaning agent, water and ethanol were further used. Water is a solvent, and ethanol is a volatile agent. The mixing ratio of water and ethanol is preferably more than half water, and more preferably, water:ethanol is 3:1.

[0022] In this example, an experiment was conducted to remove the scale adhering to the surface of glass using the attachment removal sheet 1 containing the cleaning agent with the object to be wiped being glass. In the attachment removal sheet used in this experiment, the blending ratio of malic acid was 0.2 wt%, and the blending ratio of water and ethanol was 3:1, and the total blending ratio of water and ethanol was 99.8 wt%. FIG. 3 is a photograph of the glass after the first wiping operation. As shown in the photograph of FIG. 3, circular or elliptical cracks are formed on the scale surface.

[0023] FIG. 4 is a photograph of the glass after the wiping operation is performed with the deposit removal sheet 1. As shown in the photograph of FIG. 4, the scale has been removed from the glass surface. The deposit removal sheet 1 according to the present embodiment can remove the scale adhering to the glass surface.

[0024] Further, the nonwoven fabric sheet S2 laminated on the side opposite to the wiping surface 10 may have a higher water content than the nonwoven fabric sheet S1 forming the wiping surface 10. Thereby, the nonwoven fabric sheet on the wiping surface 10 side becomes relatively dry, and the adhesion between the convex portions 11 and the scale can be further enhanced in the second wiping operation, and the scale removal performance can be enhanced.

[0025] In addition, the above-mentioned blending ratio (wt%) of the acidic component was set to 0.1 wt%, 1.0 wt%, and 5.0 wt%, and the blending ratio of water and ethanol was both 3:1, and the same experiment as above was conducted. When the blending ratio of the acidic component was 0.1 wt%, the scale on the mirror surface could be removed to some extent. When the blending ratios of the acidic component were 1.0 wt% and 5.0 wt%, all the scale could be removed as in the photograph of FIG. 4.

[0026] The blending ratio (wt%) of the acidic component in the cleaning agent is preferably 0.1 wt% or more, and more preferably 0.2 wt% or more. By setting the blending ratio of the acidic component to 0.1 wt% or more, cracks are formed on the scale surface by performing the first wiping operation with the deposit removal sheet 1, and the convex portions 11 can be fitted into the cracks on the scale surface by performing the second wiping operation with the deposit removal sheet 1.

[0027] Further, by setting the blending ratio of the acidic component to 0.2 wt% or more, a sufficient amount of cracks can be formed on the scale surface in the first wiping operation, and the convex portions 11 can be fitted into a large number of cracks on the scale surface in the second wiping operation, so that the scale removal performance can be enhanced. Note that the deposit removal sheet 1 is more likely to form cracks on the scale surface as the blending ratio of the acidic component is higher, and the scale removal performance can be enhanced.

[0028] <Embodiment 2> Next, the deposit removal sheet 1 according to Embodiment 2 will be described. FIG. 5 is a plan view showing the deposit removal sheet 1 according to Embodiment 2. FIG. 6 is a cross-sectional view when the deposit removal sheet 1 is cut along line BB in FIG. 5. For the components identical to those of Embodiment 1 described above, the same reference numerals are given and their descriptions are omitted.

[0029] In this embodiment, on the wiping surface 10 of the deposit removal sheet 1, concave portions 14 are provided in a lattice pattern, and regions other than the concave portions 14 form convex portions 13. Each of the plurality of concave portions 14 extends along the width direction or the longitudinal direction. Further, on the back surface on the opposite side of the wiping surface 10 of the deposit removal sheet 1, concave portions 16 are provided in a lattice pattern, and regions other than the concave portions 16 form convex portions 15. Each of the plurality of concave portions 16 overlaps with the concave portions 14 and extends along the width direction or the longitudinal direction.

[0030] In the deposit removal sheet 1 according to this embodiment, concave portions 14 and 16 are formed in a lattice pattern on both sides, and the inside of the lattice pattern is formed to be bulky and becomes convex portions 13 and 15. For example, after the base sheet S of the deposit removal sheet 1 is prepared, embossing is performed from both sides to form the concave portions 14 and 16 in a lattice pattern, whereby the bulky convex portions 13 and 15 can also be formed. The convex portions 13 and 15 are examples of a plurality of convex portions respectively formed between the plurality of concave portions 14 and 16.

[0031] The concave portions 14 and 16 have a width of 0.1 mm to 1.0 mm, and the interval between the plurality of concave portions is 1.0 to 3.0 mm. By forming the concave portions 14 and 16 at this interval, the convex portion 13 has scale It becomes a size that can easily fit into the cracks formed in the scale. As a result, a part of the plurality of convex portions 13 on the wiping surface 10 side fits into the cracks formed in the scale during the first wiping operation, and the other parts of the plurality of convex portions 13 adhere to the scale surface. In the deposit removal sheet 1 according to the present embodiment, at least one of the plurality of convex portions 13 fits into the crack, and the other convex portions 13 contact the scale surface in a state where the static friction coefficient is high, so that the scale is relatively moved from the surface of the object to be wiped by the second wiping operation and can be wiped off. Note that the back surface on the opposite side of the wiping surface 10 of the deposit removal sheet 1 according to the present embodiment is also formed with irregularities similar to those of the wiping surface. Therefore, the deposit removal sheet 1 according to the present embodiment can perform wiping operations on both sides.

[0032] <Embodiment 3> Next, the deposit removal sheet 1 according to Embodiment 3 will be described. FIG. 7 is a plan view showing the deposit removal sheet 1 according to Embodiment 3. FIG. 8 is a cross-sectional view when the deposit removal sheet 1 is cut along line CC in FIG. 7. Note that the same components as those in Embodiment 1 described above are denoted by the same reference numerals and their description is omitted.

[0033] In the present embodiment, the non-woven fabric sheet S1 forming the wiping surface 10 of the deposit removal sheet 1 is adhered to the non-woven fabric sheet S2 on the back surface side by a hot melt adhesive HM extending along the width direction of the base material sheet S. The hot melt adhesive HM is applied in a plurality of rows in a stripe shape at equal intervals between the non-woven fabric sheet S1 and the non-woven fabric sheet S2. The non-woven fabric sheet S1 has a recessed portion 18 where the portion adhered to the non-woven fabric sheet S2 by the hot melt adhesive HM is recessed, and a convex portion 17 where the portion between the two recessed portions 18 is relatively raised. On the wiping surface 10 side of the base material sheet S, the convex portions 17 and the recessed portions 18 are alternately arranged and both extend along the width direction of the base material sheet S.

[0034] As shown in FIG. 8, the nonwoven fabric sheet S1 is not joined to the nonwoven fabric sheet S2 at the convex portion 17. Therefore, the convex portion 17 formed on the wiping surface 10 side can move and deform relative to the nonwoven fabric sheet S2, and is easily fitted into the cracks formed in the water scale. As a result, the deposit removing sheet 1 according to the present embodiment can fit the convex portion 17 into more cracks, and can bring the movable and deformable convex portion 17 into closer contact with the water scale surface. The deposit removing sheet 1 according to the present embodiment can more reliably remove the deposits on the surface of the object to be wiped. Note that since the deposit removing sheet 1 according to the present embodiment does not contain an abrasive material or the like, damage to the surface of the object to be wiped is suppressed. In the present embodiment, the hot melt adhesive HM extends along the width direction of the base material sheet S, but is not limited thereto. The hot melt adhesive HM may extend along the longitudinal direction of the base material sheet S. In this case, the convex portion 17 and the concave portion 18 also extend along the longitudinal direction.

[0035] <Other Embodiments> As described above, the embodiments of the present invention have been described. However, the various embodiments described above can be combined as much as possible. In the above embodiment, the base material sheet S is formed by laminating two nonwoven fabric sheets, but is not limited thereto. For example, the base material sheet S may be formed of a single nonwoven fabric sheet. Further, the base material sheet S may be formed of a mesh-like nonwoven fabric sheet. The mesh-like nonwoven fabric sheet can have a lattice-like mesh portion as a concave portion and a fiber portion extending in a lattice shape as a convex portion, and the convex portion can be fitted into the crack.

[0036] In the above embodiment, water scale is exemplified as the deposit to be removed. However, the deposit removing sheet can remove other stains such as rust. The melting agent can be variously changed depending on the object to be removed.

[0037] The features included in each of the embodiments and modification examples disclosed above can be combined with each other as possible.

Description of Reference Numerals

[0038] 1··Adhesive removal sheet 10··Removing surface 11··Convex part 12··Concave part 13··Convex part 14··Concave part 15··Convex part 16··Concave part 17··Convex part 18··Concave part HM ··Hot melt adhesive S··Base material sheet S1··Non-woven fabric sheet S2··Non-woven fabric sheet

Claims

1. A base material sheet having a wiping surface for wiping off deposits on the surface of an object to be wiped; A cleaning agent containing a melting agent for melting the deposits on the surface of the object to be wiped to form cracks in the deposits, water which is a solvent of the melting agent, and a volatile agent; Protrusions provided on the wiping surface of the base material sheet and capable of fitting into the cracks; An attachment removing sheet comprising the above.

2. The deposit is scale in the form of flakes; A plurality of the protrusions are provided on the wiping surface; The protrusions have a width of 2.0 mm to 4.0 mm and a height of 0.5 mm to 1.5 mm; The interval between the plurality of protrusions is 1.0 mm to 2.0 mm. The attachment removing sheet according to Claim 1.

3. The wiping surface is provided with a plurality of recesses and a plurality of the protrusions respectively formed between the plurality of recesses; The recesses have a width of 0.1 mm to 1.0 mm; The interval between the plurality of recesses is 1.0 to 3.0 mm. The attachment removing sheet according to Claim 1.

4. The base material sheet is a non-woven fabric sheet. The attachment removing sheet according to any one of Claims 1 to 3.

5. The base material sheet is formed by laminating at least two non-woven fabric sheets; The non-woven fabric sheet forming the wiping surface is non-joined to the non-woven fabric sheet laminated on the opposite side of the wiping surface at the protrusions. The attachment removing sheet according to any one of Claims 1 to 3.

6. The non-woven fabric sheet laminated on the opposite side of the wiping surface has a higher water content than the non-woven fabric sheet forming the wiping surface. The attachment removing sheet according to Claim 5.

Images