JP2020054952A - Plate-like cleaner and method for using plate-like cleaner - Google Patents

Abstract

To provide a cleaner that removes a contaminated object fixed at a surface of a cleaned object that constitutes a bathtub and the like and is likely to be scratched, extremely rapidly from a wide range, and to provide a method for using the cleaner.SOLUTION: A plate-like cleaner is made of a resin material such as methyl methacrylate, includes a coloring material and is subjected to edge sharp processing along at least one side of the peripheries. A resin plate has a hardness value within Shore A 15 to 20. The resin material does not include any inorganic abrasive particles or includes 0.1% by weight or less based on the total amount, as a blending amount.SELECTED DRAWING: Figure 1

Description

  INDUSTRIAL APPLICABILITY The present invention provides a plate-like cleaner (which may be referred to as a descaling cleaner) and a plate-like cleaner capable of extremely quickly and widely removing contaminants on a substrate which constitutes a bathtub or the like and is easily damaged. It relates to how to use the cleaner.

Conventionally, scale is easily adhered to the surface of a bathtub, a bathroom mirror, a faucet, a shower head, and the like. ing.
For example, an eraser-like cleaner for removing stains on tiles and glass has been proposed, which can easily remove contaminants without hurting tiles or glass and erasing characters with an eraser (for example, Patent Document 1).
More specifically, a tile and glass obtained by kneading and molding 5 to 85% by weight of a styrene-based elastomer and 95 to 15% by weight of an abrasive having a Mohs hardness of 2.0 to 4.0. , Wherein the abrasive has a particle size of 0.1 to 3 mm, and the abrasive is a vegetable abrasive, which is an eraser-like cleaner for removing tiles and glass.

Further, there is proposed a descaling cleaner containing aluminum oxide particles and the like, which is suitable for descaling in bathrooms, washrooms, kitchens and the like (for example, see Patent Document 2).
More specifically, a cloth base material, a plurality of three-dimensional elements containing abrasive grains and a binder, and an adhesive layer disposed on one side of the cloth base material and joining the cloth base material and the three-dimensional element, A descaling cleaner provided with abrasive particles containing aluminum oxide particles having an average particle size of 0.2 to 5 μm.

JP 2013-48960 A (claims, etc.) JP-A-2017-170534 (Claims, etc.)

However, the stain-removing eraser-like cleaner disclosed in Patent Document 1 lacks abrasive power because the surface of the cleaner is easily scraped, and is not effective for stains that have passed for some time. Was done.
Furthermore, since the abrasive is vegetable, it can be used relatively favorably for metals, but when it is intended for ceramics, or when water scale is fixed over time, it cannot be removed quickly and in a short time. There was a problem.

  Further, since the descaling cleaner disclosed in Patent Document 2 is basically composed of a soft cloth base material, the descaling cleaner is not suitable for scraping off dried and fixed contaminants. , There was a problem that it could not be removed.

  Therefore, the inventors of the present invention have conducted intensive studies and have found that by using a flat plate-shaped cleaner having a predetermined configuration, contaminants (such as scale) adhered to the surface of the object to be cleaned without damaging the object to be cleaned. However, the present inventors have found that removal can be performed quickly and over a wide area while visually confirming, and have completed the present invention.

  That is, the present invention provides a plate-like cleaner capable of removing contaminants stuck to the surface of an object to be cleaned over a wide area in a very quick and one-time operation, and furthermore, observing the degree of removal of contaminants. It is an object of the present invention to provide a method of using a plate-like cleaner using the same.

According to the present invention, there is provided a flat plate-shaped cleaner made of a resin material containing a coloring material, wherein the edge-sharp processing is performed at least along a peripheral piece. Is provided, and the above-mentioned problem can be solved.
That is, if the plate-shaped cleaner of the present invention is a plate-shaped having a predetermined side around the periphery, along at least one side, to eliminate burrs and rounded corners, edge sharpening has been performed, contaminants are By bringing the object into contact with the object to be cleaned and sliding it, a high removal force is exhibited, and a wide range of contaminants can be removed quickly and in one operation.
In addition, since it is configured to include the coloring material, it is possible to visually check the removability of the contaminant by the contaminant adhering to the plate-like cleaner, and thus to confirm the degree of deterioration of the plate-like cleaner. it can.
In addition, even when the plate-shaped cleaner of the present invention is dropped into water, for example, while working in a bathtub, the visibility is increased by being colored, so that the plate-shaped cleaner can be quickly and easily found. Can be.

In constituting the plate-like cleaner of the present invention, the hardness of the resin material is preferably set to a value within a range of 15 to 20 as Shore A hardness.
With this configuration, since the plate-shaped cleaner of the present invention has a suitable hardness, it is possible to prevent the object to be cleaned from being scratched or the coating coming off during the operation of removing contaminants.

In constituting the plate-like cleaner of the present invention, the resin material does not contain inorganic abrasive particles, or the compounding amount of the inorganic abrasive particles is a value of 0.1% by weight or less based on the total amount. Is preferred.
With such a configuration, at the time of removing the contaminant, the removing operation can be suitably performed without causing scratches or peeling of the paint on a bathtub or the like to be cleaned (work target).

In constituting the plate-like cleaner of the present invention, it is preferable that the resin material contains methyl methacrylate and / or styrene as a main component.
With such a configuration, the plate-like cleaner of the present invention has excellent weather resistance and hardness, and can prevent deformation and breakage of the plate-like cleaner.

In constituting the plate-like cleaner of the present invention, it is preferable that the thickness of the plate-like plate-like cleaner is set to a value within a range of 0.2 to 5 mm.
With such a configuration, the hardness of the plate-shaped cleaner can be appropriately maintained, the handleability is excellent, and the operation of removing contaminants can be smoothly performed.

Further, in configuring the plate-like cleaner of the present invention, the planar shape of the plate-like cleaner is a rectangle having a long side and a short side, and the long side is set to a value within a range of 8 to 20 cm, Preferably, the side has a value within the range of 3 to less than 8 cm.
With this configuration, the long side and the short side can be selectively used according to the cleaning range, and the work can be efficiently performed.

Further, in configuring the plate-shaped cleaner of the present invention, it is preferable that a handle is provided on one of or around the plate-shaped cleaner.
Since the handle is provided as a gripping member in this manner, not only is it possible to more reliably and safely remove contaminants by the plate-like cleaner, but also the replacement itself when the plate-like cleaner has deteriorated. It will be easier.

Another aspect of the present invention is a method of using the plate-like cleaner, which includes the following steps (a) and (b).
Step (a): preparing a plate-shaped cleaner which is a flat plate-shaped cleaner including a coloring material and which has been subjected to edge sharpening at least along one of the peripheral pieces. Step (b): The flat plate-shaped cleaner is brought into contact with the surface of the object to be cleaned to which the contaminant has adhered, and is slid to remove the contaminant from the surface of the object to be cleaned. Process

FIGS. 1A to 1D are views (perspective view, side sectional view along a short side, top view, side section along a long side) for explaining a plate-shaped cleaner of the present invention. Figure). 2 (a) and 2 (b) are views provided to explain another shape of the plate-shaped cleaner of the present invention. 3 (a) and 3 (b) are views provided for explaining the state of attachment of the release paper in the plate-like cleaner of the present invention. FIGS. 4A to 4C are views provided for explaining a handle of the plate-shaped cleaner of the present invention. FIG. 5 is a flowchart for explaining a method of using the plate-shaped cleaner of the present invention.

[First Embodiment]
The first embodiment of the present invention is a flat plate-shaped cleaner 1 made of a resin material containing a coloring material as illustrated in FIG. A plate-shaped cleaner 1 characterized by being processed.
Hereinafter, the plate-shaped cleaner 1 of the first embodiment will be specifically described with reference to the drawings of FIGS.

1. Basic Configuration As shown in FIGS. 1A to 1D, the plate-like cleaner 1 of the first embodiment has a flat shape and has no burrs or rounded corners at least along a peripheral piece. It is characterized by being subjected to edge sharpening for processing into a sharp state.
By adopting such a configuration, since it has a simple structure, the production becomes easy, and good descaling performance can be exhibited.
This is because the sides around the plate-like cleaner 1 are intended to remove contaminants (scale, etc.) adhered to the object to be cleaned, and a predetermined edge sharpening process conforming to UL-1439. By performing the method described above, a sharp state without protrusions can be obtained, and the surface of the object to be cleaned can be accurately contacted, and the operation of removing contaminants can be efficiently performed without leaving a scratch on the object to be cleaned.

In addition, the sharp edge processing is, for example, cutting or processing an object to be processed (a plate-like object or the like) into a predetermined shape, and then polishing the edge of the object to a sharp object using a sandpaper or a buff. This is a process in which an object is cut into a predetermined shape using an end mill or the like, and the edges of the object are simultaneously sharpened.
In the first embodiment, specifically, in accordance with UL-1439, in a test method using a sharp edge tester SET-50 (manufactured by Excel Co., Ltd.), it was wound around a steel rod. An edge portion obtained by contacting with a tape made of PTFE (polytetrafluoroethylene resin), which is a typical example of fluororesin, and completely cutting at least 50% of the tape can be recognized as having been subjected to edge sharpening. .

2. Constituent Material (1) Main Component Further, the plate-shaped cleaner 1 of the first embodiment preferably contains methyl methacrylate and / or styrene as a main component of the resin material.
The reason for this is that when the glass cleaner has a low glass transition point, such as polyvinyl chloride or polyethylene terephthalate, for example, less than 80 ° C., the plate-like cleaner 1 may be embrittled during the cleaning operation. is there.
In addition, the resin composed of methyl methacrylate or styrene has a good hardness with respect to glass-reinforced fiber plastic which is a material for general bathtubs and wash basins, and has a property such as scratches and This is because the occurrence of peeling of the coating can be suppressed.
Further, by adopting such a configuration, the processing becomes easy and the material is relatively inexpensive, so that the manufacturing cost can be suppressed.

(2) Inorganic abrasive particles The cleaning tool may contain inorganic abrasive particles in the constituent material in order to increase the abrasive power. However, in the plate-like cleaner 1 of the present embodiment, even if it does not contain inorganic abrasive particles. There is a high possibility that a predetermined polishing force can be obtained.
In addition, when the inorganic abrasive particles are excessively contained, although there is a possibility that the efficiency of removing contaminants may increase, the risk of scratches or peeling of the coating on the object to be cleaned increases due to an increase in the polishing power.
Therefore, in the plate-shaped cleaner 1 of the present embodiment, the inorganic resin particles are not included in the colored resin material, or the compounding amount of the inorganic abrasive particles is set to a value of 0.1% by weight or less based on the total amount. Is preferred.

When the inorganic abrasive particles are mixed in a predetermined amount or less, the average particle diameter is preferably 3 μm or less, more preferably 0.01 to 2 μm, and more preferably 0.1 to 2 μm. More preferably, the value is in the range of 1 μm.
The average particle diameter of the inorganic abrasive particles can be calculated as D50 by taking a particle photograph with an optical microscope, displacing the particle photograph, applying an image processing method, or using a laser diffraction method. It can also be calculated as D50 by applying the particle size distribution meter used.

(3) Coloring Material The plate-like cleaner 1 of the first embodiment is characterized by being formed of a resin material containing a coloring material.
The reason for this is that, by coloring the contaminants so that they are easily visible, the contaminants (such as water scale) adhering to the plate-like cleaner 1 during the cleaning operation can be visually confirmed, and the removability and the degree of removal of the contaminants are confirmed. This is because it becomes easier.
If it is confirmed that the removal efficiency of the contaminants is reduced from the degree of removal of the contaminants visually recognized by coloring, the peripheral edge sharpened portion may be lost. Can be determined to need to be replaced.
Further, even if the plate-like cleaner 1 is dropped into water during work in a bathtub, etc., if the plate-like cleaner 1 containing a coloring material is used, the visibility is improved. No. 1 can be found, and the removal operation in water is also facilitated.
Here, the material used as the coloring material of the resin is not particularly limited. For example, Sumiplast (manufactured by Sumika Chemtex Co., Ltd.) and Die Color Dry (manufactured by Dainippon Seika Kogyo Co., Ltd.) ), Or at least one of pigments such as carbon black and titanium yellow.

Among these coloring materials, carbon black is more preferable.
The reason for this is that if colored with carbon black, the light-shielding property is high, and contaminants (such as water scale) adhering to the plate-like cleaner 1 during the cleaning operation become more visible, and the removability and the degree of removal of the contaminants are confirmed This is because it is easy to do.
Further, carbon black is relatively inexpensive among coloring materials.

  Therefore, by coloring the resin as the main component with carbon black, it becomes easy to confirm the removability and the degree of removal of contaminants during the cleaning operation, and it is possible to further reduce the cost during production.

3. Hardness The plate-shaped cleaner 1 according to the first embodiment has a hardness that can prevent deformation and breakage at the time of work, and that prevents damage to an object to be cleaned and peeling of paint from occurring. It is preferable that the hardness is such that the extensibility can be maintained.
More specifically, the hardness of the colored resin material is preferably set to a value in the range of 15 to 25 as Shore A hardness (JIS Z 2246), and more preferably to a value in the range of 16 to 23. More preferably, the value is in the range of 17 to 21.
By configuring the plate-shaped cleaner 1 with the Shore A hardness controlled in this way, the plate-shaped cleaner 1 can be accurately brought into contact with the surface of the object to be cleaned, and more excellent contaminant removal properties can be exhibited.

4. As shown in FIGS. 1A to 1D, the plate-like cleaner 1 according to the first embodiment has a flat plate shape and has four long sides and four short sides. It is preferably a cuboid.
The reason for this is that it has a simple structure and is easy to manufacture, and by providing a difference in length as the long side and the short side, the long side and the short side can be used properly, and the efficiency can be improved. This is because they can work well.

(1) Long side length (L1)
The length (L1) of the long side shown in FIG. 1 and the like is a length that can maintain the ease of handling in consideration of a target to be cleaned of contaminants such as a general bathtub, a mirror, and a sink. And it is preferable that the length is such that the working efficiency can be maintained suitably.
More specifically, the length (L1) of the long side is preferably set to a value in the range of 8 to 20 cm, more preferably to a value in the range of 9 to 18 cm, and in a range of 10 to 16 cm. Is more preferable.

(2) Length of short side (L2)
When polishing is performed on the long side, if the length (L2) of the short side shown in FIG. 1 is too short, the fingertip may hit the object to be cleaned at the time of work, and the object to be cleaned may be scratched or the paint may come off. The risk of occurrence increases.
Also, if the length (L2) of the short side is too long, the force for pressing the plate-like cleaner 1 against the object to be cleaned is not sufficient at the end when polishing, and the frictional force is reduced. Contamination removal efficiency may not be maintained.
Therefore, it is preferable that the length (L2) of the short side shown in FIG. 1 is a length that can appropriately maintain the efficiency of removing contaminants while taking into consideration the risk of scratching due to finger contact.
More specifically, the length (L2) of the short side is preferably set to a value in a range of less than 2 to 8 cm, more preferably to a value in a range of 3 to 7 cm, and more preferably in a range of 4 to 6 cm. It is more preferable to set the value within.

(3) Thickness (t1)
The thickness (t1) of the plate-like cleaner 1 shown in FIG. 1 and the like is such that it can maintain a strength that does not cause deformation or breakage at the time of work, and has good handleability when handled with a fingertip. preferable.
In the case of cutting a resin plate, if the thickness is more than a certain value, the processing becomes difficult and the production cost increases. Therefore, the thickness is preferably 5 mm or less, which makes the processing relatively easy.
More specifically, the thickness (t1) of the plate-like cleaner 1 is preferably set to a value in a range of 0.5 to 5 mm, more preferably to a value in a range of 0.7 to 4 mm, More preferably, the value is in the range of 1 to 3 mm.

(4) -1 Arc shape As shown in FIG. 2 (a), it is preferable that the configuration has a long side and a short side, and the portions corresponding to the four sides of the rectangle have an arc shape.
This is because, when the object to be cleaned is a material having a curved surface such as a corner of a bathtub, if the plate-like cleaner 2 has a part of four sides in an arc shape or the like, the object to be cleaned is more accurately determined. This is because they can abut.
By appropriately abutting the plate-shaped cleaner 2 having a part of four sides in an arc shape or the like with respect to the object to be cleaned, it is possible to suppress the scratches generated on the surface of the object to be cleaned and the peeling of the paint. Contaminants can be suitably removed.

(4) -2 Polygonal shape Further, the plate-like cleaner 1 of the first embodiment has a polygonal shape of five or more corners as shown in FIG. It may be.
In the present embodiment, since the peripheral portion is used for removing the contaminants, the polygonal plate-shaped cleaner 3 is used, so that the number of used surfaces increases, and it becomes possible to more efficiently perform the contaminant removal operation. .

5. Release Paper As shown in FIG. 3, the plate-like cleaner 1 before the operation of removing contaminants is covered with a release paper 10 from which a flat portion can be easily peeled off. It is preferable to use it after peeling it off.
The reason for this is that by coating with the release paper 10, even if the plate-like cleaner 1 of the present embodiment is not used for a long time, deterioration of the surface can be prevented. This is because it becomes possible to use it.

(1) Basic Configuration The release paper 10 has a base material and a pressure-sensitive adhesive layer, and depending on the type of the base material, the pressure-sensitive adhesive layer penetrates the base material between the base material and the pressure-sensitive adhesive layer. It is preferable to provide a sealing layer for preventing the occurrence.
With this configuration, it is possible to prevent the base material from being deteriorated due to the permeation of the pressure-sensitive adhesive layer into the base material, and to suitably peel off the release paper 10.

(2) Substrate The constituent material of the base material constituting the release paper 10 is not particularly limited as long as it is a paper having strength not to be broken when peeled, and for example, kraft paper, high quality paper, Glassine paper and the like can be mentioned.
For example, when glassine paper is used as the base material, the sealing layer may not be provided between the base material and the pressure-sensitive adhesive layer because the base material has low permeability.

(3) Adhesive layer The constituent material of the adhesive layer constituting the release paper 10 is a material that can be easily peeled when the release paper 10 is peeled from the plate-shaped cleaner 1 and leaves a trace of the adhesive after peeling. There is no particular limitation as long as it is not present, and examples thereof include a silicone-based adhesive and a urethane-based adhesive.

6. Handle When using the plate-shaped cleaner 1 of the first embodiment, it is also preferable to provide a handle 11 as shown in FIGS. 4A to 4C, and to firmly grip using the handle.
The reason for this is that the use of the handle 11 can reduce the possibility of dropping the plate-like cleaner 1 during the operation of removing contaminants.
Further, the plate-shaped cleaner 1 can be easily pressed against the object to be cleaned, and the plate-shaped cleaner 1 can be more accurately brought into contact with the cleaning object.

Further, as shown in FIGS. 4A and 4B, the shape of the handle 11 is preferably a rectangular shape having an insertion hole and matching the long side of the plate-shaped cleaner 1.
The reason for this is that, by adopting such a rectangular shape, the length and the thickness of the long side and the short side of the handle 11 can be appropriately changed, and the long side of the plate-shaped cleaner 1 can be wrapped. .

When a handle 11 as shown in FIGS. 4A and 4B is used, the length (L3) of the portion of the plate-like cleaner 1 protruding from the handle 11 may be set to a value of 1.5 cm or more. preferable.
The reason for this is that if the length (L3) of the portion protruding from the handle 11 is 1.5 cm or less, the handle may come into contact with the object to be cleaned during the cleaning operation, and the speed of the operation may be lost. That's why.
Accordingly, the depth of the insertion opening of the plate-like cleaner 1 of the handle 11 shown in FIGS. 4A and 4B is adjusted according to the length (L2) of the short side of the plate-like cleaner 1 and is 1.5. Preferably, the value is in the range of 4.5 cm.

On the other hand, as shown in FIG. 4C, the shape of the handle 11 is a substantially rectangular body, and a cut is made from the long side of the rectangular body, and the plate-like cleaner 1 is sandwiched between the cuts. It is also preferable to do so.
The reason for this is that the generally rectangular handle 11 with the cuts made in this way makes it possible to hold the plate-shaped cleaner 1 firmly and safely irrespective of the length of the long side and the short side of the handle 11. This is because

When the handle 11 as shown in FIG. 4C is used, it is preferable that the cut depth (L4) of the handle 11 be a value within the range of 1.5 to 5.0 cm.
The reason for this is that if the cut depth (L4) of the handle 11 is 1.5 cm or less, the plate-like cleaner 1 cannot be firmly held, and the plate-like cleaner 1 is detached from the handle 11 during the cleaning operation. This is because there is a possibility.
Further, if the cut depth (L4) of the handle 11 is 5.0 cm or more, the handle portion may come into contact with the object to be cleaned during the cleaning operation, and the speed of the operation may be lost. Furthermore, in order to prevent the handle 11 from being cut due to the widening of the cut, the handle 11 needs to be excessively large, and the handle 11 may not be able to be suitably held during the cleaning operation.
Therefore, the depth of the cut of the handle 11 shown in FIG. 4C is adjusted according to the length (L2) of the short side of the plate-like cleaner 1 and is a value within the range of 1.7 to 4.5 cm. More preferably, the value is more preferably in the range of 2.0 to 4.0 cm.

  The material of the handle 11 is not particularly limited as long as it is an elastic material having a hardness capable of holding the plate-shaped cleaner 1 and maintaining a predetermined shape. For example, natural rubber, silicone resin, Examples include urethane resin, PVC resin, acrylic resin, styrene resin, elastomer resin, and at least one of foamed resins of these resins.

[Second embodiment]
A second embodiment of the present invention is a method of using the plate-like cleaner 1 shown in FIG. 1 and the like, which includes the following steps (a) and (b).
Step (a): Step (b) of preparing a flat plate-shaped cleaner 1 that includes a coloring material and is edge-sharp-finished at least along the periphery. : Step of abutting the flat plate-shaped cleaner 1 on the surface of the predetermined object to be cleaned to remove contaminants from the surface of the predetermined object to be cleaned. Hereinafter, a specific configuration of the second embodiment will be described. This will be specifically described with reference to the flowchart of FIG.

1. Manufacturing process 1 (S1)
As shown by a symbol S1 in FIG. 5, a step of preparing a resin plate having a thickness of 0.5 to 5 mm containing a coloring material as the plate-like cleaner 1 and cutting it into a predetermined shape.
In the cutting, a method using an acrylic cutter, which is a relatively inexpensive method, is preferable.
As the shape of the plate-like cleaner 1, the planar shape is a rectangular parallelepiped having a long side and a short side, and the long side is a value within a range of 8 to 20 cm, and the short side is less than 2 to 8 cm. It is preferable to set the value within the range.

2. Manufacturing process 2 (S2)
As shown by a symbol S2 in FIG. 5, this is a step of performing edge sharpening along the periphery of the cut resin plate.
The step S2 is a step of cleaning the plate-shaped cleaner 1 having the above-mentioned (a) coloring material and having been subjected to edge sharpening at least along the periphery. This corresponds to the step of preparing.
The edge sharpening in the present embodiment is preferably performed using an end mill, because when using a thread saw or the like, there is a high possibility that burrs are generated in the periphery and it is difficult to obtain a sharp state.
In addition, it cut | disconnects using an end mill, and has a predetermined edge part which passes in the test method using the sharp edge tester SET-50 (made by Excel Co., Ltd.) based on UL-1439 as mentioned above. In this case, the edge was sharpened.

3. Removal step (S3)
As shown by the symbol S3 in FIG. 5, this is a step of removing contaminants of the object to be cleaned using the long side and the short side of the plate-like cleaner 1.
The step S3 corresponds to the step (b) of bringing the flat plate-shaped cleaner 1 into contact with the surface of the predetermined object to be cleaned to remove contaminants from the surface of the predetermined object to be cleaned.

4. Inspection process (S4)
As shown by the symbol S4 in FIG. 5, during the cleaning operation with the plate-shaped cleaner 1, a step of visually checking contaminants of the plate-shaped cleaner 1 and inspecting whether or not the contaminant removal performance can be confirmed.
Further, after the completion of the cleaning operation, the time required for the cleaning operation and the presence or absence of scratches and peeling of the paint after the cleaning operation are inspected.

5. Replacement process (S5)
As shown by a symbol S5 in FIG. 5, when the sharp edge processed portion around the plate-like cleaner 1 is worn away and the sharpness is lost, it is preferable to appropriately replace the plate-like cleaner 1.
The plate-shaped cleaner 1 maintains good contaminant removal properties by performing sharp edge processing on the periphery thereof, and the contaminant removal properties may be reduced if the periphery is worn down by polishing in the removal work. There is.
Therefore, when it can be visually recognized that the sharp edge processed portions on all sides are lost, it is preferable to replace the plate-shaped cleaner 1 with a new one, and by doing so, it is possible to prevent a reduction in the efficiency of the contaminant removal work. .

  Hereinafter, the present invention will be described in more detail with reference to examples.

[Example 1]
1. Production of plate-like cleaner (1) Preparation of plate-like plate Resin material (methyl methacrylate resin, glass transition point: 100 ° C) containing 0.1% by weight of coloring material (carbon black, manufactured by Mitsubishi Chemical Corporation) To prepare a flat plate.
That is, a large-sized flat plate was cut using an end mill to prepare a rectangular flat plate having a thickness of 2 mm, a long side of 13 cm and a short side of 4 cm as shown in FIG.
When the Shore A hardness of the flat plate was measured in accordance with JIS Z 2246, the value was 18, and no inorganic abrasive particles were mixed in the resin material.

(2) Formation of Plate Cleaner Next, sharp edges were applied to the four sides (long side and short side) of the prepared flat plate.
However, if the edge cut using an end mill passes the test method using a sharp edge tester SET-50 (manufactured by Excel Co., Ltd.) in accordance with UL-1439 as described above, It was assumed that edge sharpening was performed even in the state of the predetermined edge portion.

2. Preparation of an object to be cleaned A bathtub having a long side of 160 cm and a short side of 100 cm was prepared as an object to be cleaned, and 180 liters of hot water (41 ° C.) was put into the bath and used for 2 days in a bath. After that (two men used one hour each, for a total of four hours), the hot water was drained and the contaminants adhering to the surface were targeted.

3. Evaluation of plate-like cleaner (1) Sharp-edge property of plate-like cleaner The test method using a sharp edge tester SET-50 (manufactured by Excel Co., Ltd.) in accordance with UL-1439 to determine the sharp-edge property of the formed plate-like cleaner. Was evaluated. Table 1 shows the obtained results.
A: 80% or more of the PTFE tape was completely cut.
：: 50% or more of the PTFE tape was completely cut.
Δ: 30% or more of the PTFE tape was completely cut.
×: The portion of the PTFE tape that could be completely cut was less than 30%.

(2) Visibility of contaminants During the cleaning operation, a predetermined amount of contaminants are removed by the plate cleaner, and the contaminants adhering to the plate cleaner are visually checked. Was evaluated for visibility. Table 1 shows the obtained results.
A: A predetermined amount of contaminants was removed within 2 seconds, and it was confirmed whether or not contaminants had adhered.
：: A predetermined amount of contaminant was removed within 5 seconds, and the presence or absence of the contaminant was confirmed.
Δ: A predetermined amount of contaminants was removed within 10 seconds, and the presence or absence of contaminants could be confirmed.
×: Within 10 seconds, a predetermined amount of contaminants could not be removed, and the presence or absence of contaminants could not be confirmed.

(3) Washability After removing contaminants (mainly water scale) on all surfaces of the bathtub using a prepared plate-like cleaner, the washability of the bathtub was evaluated according to the following criteria. Table 1 shows the obtained results.
A: The entire bathtub can be cleaned within 15 minutes.
：: The entire bathtub can be cleaned within 30 minutes.
Δ: The entire bathtub can be cleaned within 60 minutes.
×: If less than 60 minutes, the entire bathtub cannot be washed.

(4) Occurrence of Scratches and Peeling of Paint After the operation of removing contaminants, the occurrence of scratches and peeling of paint on the bathtub and the like was visually observed and evaluated according to the following criteria. Table 1 shows the obtained results.
：: No scratching or peeling of the coating was observed at all.
：: scar generation and peeling of the paint are hardly observed.
Δ: Scratch generation and paint peeling are slightly observed.
×: Remarkable scratching and peeling of the coating are observed.

[Example 2]
In Example 2, the shape of the plate-shaped cleaner is rectangular, and as shown in FIG. 2A, a part of a portion corresponding to a corner of the rectangle is processed into an arc shape and an inverted arc shape. In the same manner as in Example 1, sharp edge processing was performed, and a plate-like cleaner was manufactured and evaluated. Table 1 shows the obtained results.

[Example 3]
Example 3 was the same as Example 1 except that the plate-shaped cleaner further contained 0.01% by weight of inorganic abrasive particles (aluminum oxide) with respect to the total amount of the resin material constituting the plate-shaped cleaner. Similarly, sharp edge processing was performed to produce a plate-shaped cleaner, which was evaluated. Table 1 shows the obtained results.

[Example 4]
In Example 4, as shown in FIG. 4 (c), a plate-like cleaner having a handle attached was evaluated in the same manner as in Example 1 as a plate-like cleaner. Table 1 shows the obtained results.

[Comparative Example 1]
In Comparative Example 1, a coloring material was not included, and a transparent acrylic resin (MMA) containing 5% by weight of inorganic abrasive particles (aluminum oxide) was processed into a flat plate shape. Then, a plate-shaped cleaner was manufactured by performing sharp edge processing and evaluated. Table 1 shows the obtained results.

[Comparative Example 2]
In Comparative Example 2, a plate-shaped cleaner was manufactured and evaluated in the same manner as in Example 1, except that cutting of the plate-shaped cleaner was performed with a thread saw, and the periphery of each of the cleaners was not subjected to sharp edge processing. Table 1 shows the obtained results.

  As described above, according to the plate-like cleaner of the present invention and the method of using the same, only by performing a predetermined sharp edge processing on a resin plate having a predetermined shape and containing a coloring material, contamination that adheres to a bathtub or the like can be achieved. Objects can be removed very quickly and widely in a single operation without using a cleaning agent or the like.

Therefore, according to the present invention, it is possible to economically provide a very simple structure and economical plate-like cleaner and a method of using the same by having a predetermined configuration.
In addition, because of the configuration using a resin plate containing a coloring material, it is possible to suitably perform the operation of removing contaminants in water.For example, even if a plate-like cleaner is dropped in water, it is colored. , Can be easily found visually.
In addition, sharp edge processing is applied to the periphery, so that it can accurately abut against the surface of the object to be cleaned, preventing scratches on the object to be cleaned and peeling of the paint, and sticking to the object to be cleaned. Even a contaminated substance (scale, etc.) can be quickly and widely removed in a single operation.

  Therefore, according to the plate-shaped cleaner and the method of using the same according to the present invention, it is expected to significantly contribute to the improvement of the efficiency of the work of removing contaminants (such as water scale) in the work of cleaning a bathtub or a washroom.

1: Plate cleaners 1a, 1b, 1c, 1d: Long sides 1e, 1f, 1g, 1h of the plate cleaner: Short sides of the plate cleaner 2: Plate cleaners in which a portion corresponding to four sides is partially arc-shaped. 3: Polygonal plate cleaner 4: Resin material 5: Colored material 10, 10a, 10b: Release paper 11: Handle

Claims (8)

  What is claimed is: 1. A plate-shaped cleaner made of a resin material containing a coloring material, wherein the plate-shaped cleaner has been subjected to edge sharpening at least along a peripheral piece.   The plate-shaped cleaner according to claim 1, wherein the hardness of the resin material is a Shore A hardness within a range of 15 to 20.   The resin material does not contain inorganic abrasive particles, or the compounding amount of the inorganic abrasive particles is set to a value of 0.1% by weight or less based on the total amount. 3. The plate-shaped cleaner according to 2.   The plate-shaped cleaner according to any one of claims 1 to 3, wherein the resin material contains methyl methacrylate and / or styrene as a main component.   The plate-shaped cleaner according to any one of claims 1 to 4, wherein the thickness of the plate-shaped cleaner is set to a value within a range of 0.2 to 5 mm.   The planar shape is a rectangle having a long side and a short side, wherein the long side has a value in a range of 8 to 20 cm, and the short side has a value in a range of less than 3 to 8 mm. The plate-shaped cleaner according to any one of claims 1 to 5.   The plate-shaped cleaner according to any one of claims 1 to 6, wherein a handle is provided on one of or around the plate-shaped cleaner. A method for using a plate-like cleaner, comprising the following steps (a) and (b).
Step (a): preparing a plate-shaped cleaner which is a flat plate-shaped cleaner including a coloring material and which has been subjected to edge sharpening at least along one of the peripheral pieces. Step (b): The flat plate-shaped cleaner is brought into contact with the surface of the object to be cleaned to which the contaminant has adhered, and is slid to remove the contaminant from the surface of the object to be cleaned. Process

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