JP2018130317A - Cotton swab and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cotton swab that can satisfactorily express at least one of antibacterial, bactericidal, and deodorization functions at the time of use and a method for producing the same.SOLUTION: A cotton swab 1 has a rod 2, and a cotton body 3, 3 provided at each end of the rod 2. To at least the surface of the cotton body 3, 3, attached is burned scallop shell powder through a binder. The mass ratio of the burned scallop shell powder to the bone dry mass of the cotton body 3, 3 is 0.1-8 mass%.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cotton swab and a method for producing the same.

Cotton swabs are instruments intended for cleaning and wiping, and are used for various purposes.
In recent years, as a tooth cleaning tool that can clean teeth without water, a medicine having a medicinal component effective for preventing tooth decay and periodontal disease has been proposed (Patent Document 1). As drugs, vitamin E, fluorine, chlorhexidine hydrochloride and the like are described.

Utility Model Registration No. 3034082

  However, in the case of the above drugs, the amount that can be attached to the cotton body is not so large. Therefore, it cannot be said that the effect of sterilization by the cleaning tool of Patent Document 1 is sufficient.

  An object of this invention is to provide the cotton swab which can fully express any one or more functions of antibacterial, disinfection, and deodorizing at the time of use, and its manufacturing method.

The present invention has the following aspects.
[1] A cotton swab comprising a shaft and a cotton body provided on at least one end of the shaft, and scallop shell fired powder is attached to at least the surface of the cotton body via a binder,
A cotton swab, wherein a mass ratio of the scallop shell baked powder with respect to an absolute dry mass of the cotton body is 0.1 to 8% by mass.
[2] The cotton swab according to [1], wherein the binder is polyvinyl alcohol.
[3] Applying the first binder solution to the surface of at least one end of the shaft, bringing the cotton into contact with the surface, forming the cotton into a cotton body, and in the middle of forming the cotton And applying a second binder solution containing scallop shell baked powder on the surface of the cotton and drying to form a cotton body, and the amount of the second binder solution applied to the cotton body A method for producing a cotton swab, characterized in that the mass ratio of the scallop shell calcined powder to the absolutely dry mass is 0.1 to 8 mass%.
[4] Applying a first binder solution to the surface of at least one end of the shaft, bringing the cotton into contact with the surface, forming the cotton into a cotton body, and in the middle of forming the cotton Applying a second binder solution to the surface of the cotton and drying it to form a cotton body; and applying and drying a third binder solution containing scallop shell fired powder on the cotton body. And the amount of the third binder solution applied is an amount such that the mass ratio of the scallop shell calcined powder to the dry mass of the cotton body is 0.1 to 8% by mass. Production method.
[5] Applying a first binder solution to the surface of at least one end of the shaft, bringing the cotton into contact with the surface, forming the cotton into a cotton body, and in the middle of forming the cotton A step of applying a second binder solution to the surface of the cotton and drying it to form a cotton body, and a step of applying and drying a suspension containing a scallop shell fired powder and no binder to the cotton body And the amount of the suspension applied is such that the mass ratio of the scallop shell calcined powder to the dry mass of the cotton body is 0.1 to 8% by mass. Manufacturing method.

The cotton swab of the present invention can sufficiently exhibit one or more functions of antibacterial, sterilization, and deodorization during use.
According to the method for producing a swab of the present invention, it is possible to produce a swab that can sufficiently exhibit one or more functions of antibacterial, sterilization, and deodorization during use.

It is a side view showing typically one embodiment of the cotton swab of the present invention. It is a block diagram which shows schematic structure of the manufacturing apparatus of the cotton swab used in 1st embodiment of the manufacturing method of a cotton swab. It is a block diagram which shows schematic structure of the manufacturing apparatus of the cotton swab used in 2nd embodiment or 3rd embodiment of the manufacturing method of a cotton swab.

  Hereinafter, the cotton swab and the manufacturing method thereof according to the present invention will be described with reference to the accompanying drawings.

<Cotton swab>
FIG. 1 is a side view schematically showing one embodiment of the cotton swab of the present invention.
The cotton swab 1 of this embodiment includes a shaft 2 and cotton bodies 3 and 3 provided at both ends 2a and 2a of the shaft 2, respectively.

The shaft 2 is not particularly limited, and may be a known shaft for a cotton swab.
Examples of the material of the shaft 2 include paper, plastic, and wood.
The thickness of the shaft 2 may be 1 to 5 mm, for example.
The length of the shaft 2 may be 50 to 250 mm, for example.

The cotton body 3 is obtained by molding cotton into a predetermined shape. In this embodiment, the shape of the cotton body 3 is a water droplet type.
The cotton body 3 is fixed to the shaft 2 via a binder (not shown). When the material of the shaft 2 is thermoplastic, the cotton body 3 may be fixed to the shaft 2 by heat fusion.
Sintered scallop shell powder is attached to at least the surface of the cotton body 3 via a binder (both not shown). The scallop shell fired powder may or may not adhere to portions other than the surface of the cotton body 3.

The mass of one cotton body 3 may be 0.01 to 1 g as an absolutely dry mass, for example.
In the present embodiment, a binder, scallop shell fired powder, and the like are attached to the cotton body 3. The mass (absolute dry mass) of the cotton body 3 indicates the mass of only cotton.
The absolute dry mass of the cotton body 3 is the existing mass of the binder calculated from the amount and concentration of the binder solution applied to the shaft 2 in the manufacturing process of the cotton swab 1, the existing mass of the added scallop shell fired powder, It is calculated by subtracting the simple substance mass from the mass of the cotton swab 1.

The binder has a function of fixing the scallop shell fired powder to the cotton body 3 at least on the surface of the cotton body 3. In addition, at least on the surface of the cotton body 3, the cotton body 3 is also fixed to maintain the shape of the cotton body 3.
Examples of the binder include polyvinyl alcohol (hereinafter also referred to as “PVA”), vinyl acetate resin, ethylene / vinyl acetate copolymer, sodium carboxymethyl cellulose, and the like. Any one of these binders may be used alone, or two or more thereof may be used in combination.
As the binder, PVA is preferable. PVA has a low hygroscopic property and is excellent in terms of reproducibility of quantitative and preparation results.

Scallop shell baked powder has the effect of raising the pH of this aqueous liquid when it comes into contact with the aqueous liquid. The effect of raising the pH by the scallop shell fired powder is large, and a sufficient pH raising effect can be obtained even with a small amount. This action is due to the fact that components (calcium oxide, calcium hydroxide, etc.) contained in the scallop shell calcined powder are dissolved in this aqueous liquid when the aqueous liquid comes into contact with the surface of the cotton body 3.
Therefore, when the aqueous liquid comes into contact with the cotton body 3, the pH of the aqueous liquid increases on the surface of the cotton body 3. The pH after the increase is usually 10 or more, typically in the range of 12-13. The pH of the surface stagnant water described in Examples described later can be regarded as the pH after this increase.

The aqueous liquid whose pH is increased by the scallop shell baked powder exhibits excellent antibacterial function, bactericidal function and deodorizing function due to its strong alkalinity. Therefore, when the cotton body 3 is brought into contact with a place where any function of antibacterial, sterilization, and deodorization is required in the presence of an aqueous liquid, at least one of antibacterial, sterilization, and deodorization functions at that place. Is demonstrated.
An aqueous liquid is a liquid containing water. The aqueous liquid may be pre-existing in the place (for example, saliva in the oral cavity), and is supplied to the cotton body 3 before contacting the cotton body 3 with the place. Also good.

The average particle size of the scallop shell fired powder may be, for example, 1 to 100 μm. The average particle diameter can be measured by various known particle size distribution measuring devices.
The scallop shell calcined powder preferably has a purity as calcium oxide or calcium hydroxide of 90% or more, more preferably 95% or more.
As the scallop shell calcined powder, one produced by a known production method (for example, a process called “calcination”) may be used, or a commercially available product may be used.

  The mass ratio of the scallop shell calcined powder to the absolutely dry mass of the cotton body 3 is 0.1 to 8 mass%, preferably 0.1 to 5 mass%. If this mass ratio is not less than the lower limit of the above range, there is a sufficient amount of scallop shell fired powder on the surface of the cotton body 3 to raise the pH of the contacted aqueous liquid, antibacterial, sterilizing and deodorizing. Any one or more functions are sufficiently exhibited. If this mass ratio is less than or equal to the upper limit of the above range, the scallop shell fired powder will not easily fall off the cotton body 3.

  Other components other than the binder and the scallop shell fired powder may further adhere to the cotton body 3 as necessary, as long as the effects of the present invention are not impaired.

(Function and effect)
In the cotton swab 1 of the present embodiment, 0.1 to 8% by mass of scallop shell fired powder with respect to the absolutely dry mass of the cotton body 3 is attached to at least the surface of the cotton body 3 through a binder. Therefore, one or more functions of antibacterial, sterilization, and deodorization are exhibited during use. That is, when the cotton body 3 is brought into contact with the surface of the cotton body 3 in the presence of the aqueous liquid in a place where any function of antibacterial, sterilization, and deodorization is required, the pH of the aqueous liquid in contact with the surface of the cotton body 3 One or more functions of antibacterial, sterilization, and deodorization are exhibited in that place.
In addition, if the mass ratio of the scallop shell calcined powder with respect to the absolutely dry mass of the cotton body 3 is 0.1 mass% or more, even if this mass ratio changes, the pH of the aqueous liquid in contact with the surface of the cotton body 3 is It becomes almost constant. This is thought to be because the solubility of the scallop shell fired powder in water is as small as 1.19 g / L (25 ° C.). Therefore, it is not necessary to strictly control this mass ratio, and the manufacture is easy.
In addition, because of its low solubility in water, an aqueous liquid whose pH has been increased by the scallop shell baked powder is stimulated when brought into contact with mucous membranes, skin, etc., even though the pH is high (for example, pH 12). It is hard to produce a malfunction.
Therefore, the cotton swab 1 can be suitably used as a cleaning instrument or a wiping instrument in a place where any one of antibacterial, sterilizing, and deodorizing functions is required. Examples of such places include the oral cavity and ear canal of animals such as humans and pet animals (dogs, cats, etc.).

<Manufacturing method of cotton swab>
(First embodiment)
The first embodiment of the method for manufacturing the cotton swab 1 will be described with reference to FIG. In the following description, the same constituent elements as those described above are denoted by the same reference numerals, and the description thereof is omitted.
FIG. 2 is a block diagram showing a schematic configuration of the cotton swab manufacturing apparatus 10 used in the manufacturing method of the present embodiment.
The manufacturing apparatus 10 includes a shaft conveyance path 11, a shaft supply unit 12, a first application unit 13, a cotton supply unit 14, a cotton body forming unit 15, a second application unit 16 and a shaft supply unit 12 disposed on the shaft conveyance path 11, respectively. A drying unit 17 is provided.

The shaft conveyance path 11 can convey the shaft 2 supplied from the shaft supply unit 12 to the drying unit 17 through the first application unit 13, the cotton supply unit 14, the cotton body forming unit 15, and the second application unit 16. It is said that. In the shaft conveyance path 11, the shaft 2 is typically translated by a pair of belts that sandwich the central portion of the shaft 2 while rotating the shaft 2 around the rotation shaft.
The shaft supply unit 12 can supply the shaft 2 to the transport path 11.

The first application unit 13 is arranged at a later stage than the supply position of the shaft 2 by the shaft supply unit 12. The first application unit 13 can apply the first binder solution to the surfaces of the end portions 2 a and 2 a of the shaft 2 being conveyed through the conveyance path 11.
As the 1st application part 13, what is equipped with the storage tank which stores the 1st binder solution, and the roller arrange | positioned so that the 1st binder solution in this storage tank may be mentioned is mentioned. When the end portions 2a and 2a of the shaft 2 come into contact with the roller to which the first binder solution is adhered, the first binder solution is applied to the peripheral surfaces of the end portions 2a and 2a.

The cotton supply unit 14 is arranged at the subsequent stage of the first application unit 13. The cotton supply unit 14 supplies cotton onto the shaft conveyance path 11 and can bring the cotton into contact with the surfaces of the end portions 2a and 2a coated with the first binder solution at the first application unit 13. It is said that.
In the cotton supply unit 14, typically, the cotton loosened by the defibrator disposed above the shaft conveyance path 11 falls and accumulates on a table disposed below the shaft conveyance path 11. It has become. By moving the shaft 2 on the cotton while rotating, the cotton can adhere to the surfaces of the end portions 2a and 2a via the first binder solution.

The cotton body forming part 15 and the second application part 16 are respectively arranged in the subsequent stage of the cotton supply part 14. The cotton body molding unit 15 can mold the cotton supplied by the cotton supply unit 14 into a water droplet mold. The second application unit 16 can apply the second binder solution to the cotton surface while the cotton body forming unit 15 is forming the cotton.
As an example of the configuration of the cotton body forming portion 15 and the second application portion 16, the cotton body forming portion 15 includes a plurality of forming dies arranged along the shaft conveyance path 11, and a space between the plurality of forming dies. An example in which the second application part 16 is disposed at least at one place is given. The molding die is formed with a recess corresponding to the water droplet mold which is the shape to be molded. When the cotton adhering to the end portions 2a, 2a rotates together with the shaft 2 in the recess, the cotton is formed into a cotton body. In the case of this example, the second application unit 16 includes, for example, a storage tank that stores the second binder solution, and a roller that is disposed so as to contact the second binder solution in the storage tank. Things. The second binder solution is applied to the surface of the cotton by contacting the roller, to which the second binder solution has adhered, with the cotton formed in the water droplet mold that has adhered to the ends 2a, 2a of the shaft 2. It is like that.
As another example of the configuration of the cotton body forming portion 15 and the second application portion 16, the cotton body forming portion 15 includes at least one mold, and the second application portion 16 is provided in the recess of the mold. An example configured to supply a second binder solution is given. In this case, the second binder solution is applied to the surface of the cotton by rotating the cotton together with the shaft 2 attached to the end portions 2a and 2a in the recess to which the second binder solution is supplied. It has become.

The drying unit 17 is disposed at the subsequent stage of the cotton body forming unit 15. The drying unit 17 can dry the cotton coated with the second binder solution. The drying unit 17 may be various heating devices such as a hot air dryer.
In addition, the axis | shaft conveyance path 11, the axis | shaft supply part 12, the 1st application part 13, the cotton supply part 14, the cotton body shaping | molding part 15, the 2nd application part 16, and the drying part 17 are each limited to what was quoted above. Instead, those conventionally used in cotton swab manufacturing apparatuses can be appropriately employed.

Next, the manufacturing method of the cotton swab 1 of this embodiment using the manufacturing apparatus 10 is demonstrated.
In the present embodiment, the shaft 2 is supplied from the shaft supply unit 12 to the shaft conveyance path 11, and the shaft 2 is supplied to the first application unit 13, the cotton supply unit 14, the cotton body forming unit 15, and the shaft conveyance path 11. The second application unit 16 is sequentially conveyed to the drying unit 17. At that time, first, a first binder solution is applied to the surfaces of the end portions 2 a and 2 a of the shaft 2 by the first application unit 13. Next, cotton is brought into contact with the surfaces of the end portions 2a and 2a at the cotton supply unit. Thereby, cotton adheres to the surfaces of the end portions 2a and 2a through the first binder solution. Next, in the cotton body forming part 15, the cotton adhering to the shaft 2 is formed into a cotton body, and the second binder solution is applied to the cotton surface by the second application part 16 in the course of forming the cotton. Apply. Thereafter, in the drying unit 17, the cotton coated with the second binder solution is dried to form the cotton body 3. Thereby, the cotton swab 1 is obtained. Inspection, packaging, and the like are performed on the obtained cotton swab 1 as necessary.

The first binder solution includes a liquid medium and a binder dissolved in the liquid medium.
As the liquid medium, water is usually used.
The binder of the first binder solution fixes the shaft 2 and the cotton body 3 together. The binder is the same as described above. The binder contained in the first binder solution may be one type or two or more types.
The binder content (solid content) in the first binder solution may be, for example, 3 to 15% by mass with respect to the total mass of the first binder solution.
The coating amount of the first binder solution may be 1 to 10 times the absolute dry mass of the cotton body 3, for example.

Similar to the first binder solution, the second binder solution includes a liquid medium and a binder dissolved in the liquid medium. In the manufacturing method of the present embodiment, the second binder solution also includes scallop shell fired powder.
The liquid medium, binder, and scallop shell fired powder are the same as described above.
The binder of the second binder solution fixes the cottons at least on the surface of the cotton body 3 and maintains the shape of the cotton body 3. Further, the scallop shell fired powder is fixed to the cotton body 3.
Therefore, the binder of the second binder solution is attached to at least the surface of the cotton body 3 of the obtained cotton swab 1, and the scallop shell fired powder is attached via this binder.
The binder contained in the second binder solution may be one type or two or more types. The binder contained in the first binder solution and the binder contained in the second binder solution may be the same or different.

The binder content (solid content) in the second binder solution may be, for example, 3 to 15% by mass with respect to the total mass of the second binder solution.
The content of the scallop shell fired powder in the second binder solution may be, for example, 0.01 to 2% by mass with respect to the total mass of the second binder solution.
The second binder solution may further contain other components other than the binder and the scallop shell calcined powder as needed, as long as the effects of the present invention are not impaired.
The second binder solution is preferably used in a state where the scallop shell fired powder is uniformly dispersed.

The coating amount of the second binder solution is set according to the mass ratio of the scallop shell calcined powder to the absolute dry mass of the cotton body 3 to be formed (the absolute dry mass of the cotton adhered to the shaft 2). As described above, the mass ratio is 0.1 to 8 mass%, preferably 0.1 to 5 mass%.
The conditions for drying after molding are not particularly limited, and may be, for example, 60 to 120 ° C. for 3 to 60 minutes.

(Second embodiment)
A second embodiment of the method for manufacturing the cotton swab 1 will be described with reference to FIG.
FIG. 3 is a block diagram showing a schematic configuration of the cotton swab manufacturing apparatus 20 used in the manufacturing method of the present embodiment.
The manufacturing apparatus 20 includes a shaft transport path 11, a shaft supply unit 12, a first application unit 13, a cotton supply unit 14, a cotton body forming unit 15, a second application unit 16 disposed on the shaft transport path 11, A drying unit 17, a third application unit 21, and a second drying unit 22 are provided.
The manufacturing apparatus 20 is the same as the manufacturing apparatus 10 described above except that it further includes a third application unit 21 and a second drying unit 22.

The third application unit 21 is arranged at the subsequent stage of the drying unit 17. In the present embodiment, the third application unit 21 can apply the third binder solution to the surface of the formed cotton body 3. The 3rd application part 21 may be a thing of the same composition as the 1st application part 13 and the 2nd application part 16, for example.
The second drying unit 22 is arranged at the subsequent stage of the third application unit 21. In the present embodiment, the second drying unit 22 can dry the cotton coated with the third binder solution. The second drying unit 22 may have the same configuration as the drying unit 17, for example.

Next, the manufacturing method of the cotton swab 1 of this embodiment using the manufacturing apparatus 20 is demonstrated.
In the present embodiment, the shaft 2 is supplied from the shaft supply unit 12 to the shaft conveyance path 11, and the shaft 2 is supplied to the first application unit 13, the cotton supply unit 14, the cotton body forming unit 15, and the shaft conveyance path 11. The second coating unit 16, the drying unit 17, and the third coating unit 21 are sequentially conveyed to the second drying unit 22. At that time, first, a first binder solution is applied to the surfaces of the end portions 2 a and 2 a of the shaft 2 by the first application unit 13. Next, cotton is brought into contact with the surfaces of the end portions 2a and 2a at the cotton supply unit. Thereby, cotton adheres to the surfaces of the end portions 2a and 2a through the first binder solution. Next, in the cotton body forming part 15, the cotton adhering to the shaft 2 is formed into a cotton body, and the second binder solution is applied to the cotton surface by the second application part 16 in the course of forming the cotton. Apply. Next, in the drying unit 17, the cotton coated with the second binder solution is dried to form the cotton body 3. Next, a third binder solution is applied to the surface of the cotton body 3 by the third application part 21. Thereafter, the cotton body 3 to which the third binder solution is applied is dried in the drying unit 17 to obtain the cotton swab 1. Inspection, packaging, and the like are performed on the obtained cotton swab 1 as necessary.

In the present embodiment, the first binder solution is the same as the first binder solution in the first embodiment. The second binder solution is the same as the second binder solution in the first embodiment except that the scallop shell fired powder may not be contained.
The steps up to drying in the drying unit 17 can be performed in the same manner as in the first embodiment.

Similar to the first binder solution and the second binder solution, the third binder solution includes a binder and a solvent that dissolves the binder. In the manufacturing method of the present embodiment, the third binder solution also includes scallop shell fired powder.
Therefore, the binder of the second binder solution and the binder of the third binder solution are attached to at least the surface of the cotton body 3 of the obtained swab 1, and the scallop shell fired powder is passed through these binders. Is attached.
The binder and the solvent are the same as described above. The binder contained in the third binder solution may be one type or two or more types. The binder contained in the second binder solution and the binder contained in the third binder solution may be the same or different.

The binder content (solid content) in the third binder solution may be, for example, 3 to 15% by mass with respect to the total mass of the third binder solution.
The content of the scallop shell fired powder in the third binder solution may be, for example, 0.01 to 2% by mass with respect to the total mass of the third binder solution.
The third binder solution may further contain other components other than the binder and the scallop shell baked powder as needed, as long as the effects of the present invention are not impaired.
The third binder solution is preferably used in a state where the scallop shell fired powder is uniformly dispersed.

The coating amount of the third binder solution is set according to the mass ratio of the scallop shell calcined powder to the absolute dry mass of the cotton body 3 to be formed (the absolute dry mass of cotton attached to the shaft 2). As described above, the mass ratio is 0.1 to 8 mass%, preferably 0.1 to 5 mass%.
The drying conditions after the application of the third binder solution are not particularly limited, and may be, for example, 60 to 120 ° C. for 3 to 60 minutes.

(Third embodiment)
Next, a third embodiment of the method for manufacturing the cotton swab 1 will be described.
In the present embodiment, the manufacturing apparatus 20 is used as in the second embodiment described above. However, in this embodiment, the 3rd application part 21 apply | coats the suspension (henceforth the suspension A) which contains not a 3rd binder solution but a scallop shell baking powder and does not contain a binder. It is possible. That is, the manufacturing method of the swab 1 of this embodiment is the same as the manufacturing method of the swab 1 of the second embodiment, except that the suspension A is used instead of the third binder solution.

The suspension A includes a liquid medium and scallop shell baked powder dispersed in the liquid medium. As the liquid medium, water is usually used.
Unlike the third binder solution, the suspension A does not contain a binder. Even if the suspension A does not contain a binder, the binder of the second binder solution is attached in advance to at least the surface of the cotton body 3 to which the suspension A is applied. When the suspension A is applied, the binder adhering to the surface of the cotton body 3 is dissolved in the liquid medium of the suspension A. Therefore, when the suspension A is applied and dried, the scallop shell fired powder is fixed to the cotton body 3 by the binder.

The content of the scallop shell calcined powder in the suspension A is preferably 0.01 to 2% by mass with respect to the total mass of the suspension A.
The suspension A may further contain other components other than the binder and the scallop shell baked powder as long as they do not impair the effects of the present invention.
It is preferable to use the suspension A in a state where the scallop shell baked powder is uniformly dispersed.

As mentioned above, although the embodiment was shown and the manufacturing method of the cotton swab of the present invention was explained, the present invention is not limited to these embodiments. Each configuration in the above embodiment, a combination thereof, and the like are examples, and the addition, omission, replacement, and other modifications of the configuration can be made without departing from the spirit of the present invention.
For example, in the said embodiment, although the cotton body was provided in the both ends of the axis | shaft, the cotton body may be provided in the one edge part of the axis | shaft.
The shape of the cotton body is not limited to the water droplet shape shown in the above embodiment, and various known shapes can be employed. For example, a conical shape or a cylindrical shape may be used. A shape having irregularities on the surface, such as a shape having grooves or ridges extending along the circumferential direction of the cotton body, may be used.

Hereinafter, the present invention will be described in more detail using examples, but the present invention is not limited to these examples.
The methods used for measurement and evaluation in each example are shown below.

(Measurement method of absolute dry mass of cotton)
In the manufacturing process of the swab, the mass immediately after the binder solution was applied to the shaft was measured, and the mass of the binder solution was determined by subtracting the mass of the shaft alone. This was multiplied by the binder concentration to determine the mass of the binder fixed on the shaft (mass A). Next, in the manufacturing process of the cotton swab, the mass immediately after fixing the cotton body to the shaft is measured, and the mass immediately after applying the binder solution containing the scallop shell calcined powder is also measured, and the difference between them is measured. The mass of the binder solution containing the scallop shell fired powder was determined. This was multiplied by the concentration of the scallop shell calcined powder, and the mass of the scallop shell calcined powder fixed on the cotton body was determined (mass B). The mass of the completed cotton swab was measured (mass C), and the mass A, mass B, and the single mass of the shaft were subtracted from the mass C to obtain an absolutely dry mass of the cotton body.

(Method of measuring the pH of the surface water on the cotton body)
One cotton swab obtained was wetted with 0.5 mL of pure water, and immediately after that, the pH of the surface retained water was measured. The pH was measured by bringing a pH test paper (product name: pH 0-14, manufactured by ASONE) into contact with surface retained water on the surface of the cotton body under the condition of 25 ° C.

(Evaluation method for the presence or absence of powder omission)
Ten cotton swabs thus obtained were put in a transparent plastic bag, held in a hand and shaken for 10 seconds, and then whether or not powder fall was observed was visually observed.

<Example 1>
Sintered scallop shell powder (manufactured by Natural Japan Co., Ltd.) 0.1 g and polyvinyl alcohol (PVA) 5 mass% aqueous solution 99.9 g (5.0 g as PVA) were mixed, and the mixture (hereinafter referred to as “scallop PVA mixed suspension”). ").
A binder solution (PVA 5 mass% aqueous solution) was applied to the surface of both ends of the paper shaft, and 25 mg of cotton passed through a defibrator was adhered to each surface. Next, the bonded cotton was formed into a cotton body using a mold, 125 mg of scallop PVA mixed suspension was applied to the surface, and dried to obtain a cotton swab of Example 1. In this example, the mass ratio of the scallop shell calcined powder to the absolutely dry mass of the cotton body corresponds to 0.5%. About the obtained cotton swab, the measurement of the pH of surface residence water and the presence or absence of powder fall-off were performed. The results are shown in Table 1.

<Example 2>
A swab was obtained in the same procedure as in Example 1 except that the amount of scallop shell calcined powder (manufactured by Natural Japan) was 0.4 g and the amount of PVA 5 mass% aqueous solution was 99.6 g (5.0 g as PVA). It was. In this example, the mass ratio of the scallop shell calcined powder to the absolutely dry mass of the cotton body corresponds to 2%. About the obtained cotton swab, the measurement of the pH of surface residence water and the presence or absence of powder fall-off were performed. The results are shown in Table 1.

<Example 3>
A swab was obtained in the same procedure as in Example 1 except that the amount of the scallop shell fired powder (manufactured by Natural Japan) was 1.0 g and the amount of the 5 mass% PVA aqueous solution was 99.0 g (5.0 g as PVA). It was. In this example, the mass ratio of the scallop shell calcined powder to the absolutely dry mass of the cotton body corresponds to 5%. About the obtained cotton swab, the measurement of the pH of surface residence water and the presence or absence of powder fall-off were performed. The results are shown in Table 1.

<Comparative Example 1>
In Example 1, a cotton swab was obtained in the same procedure as in Example 1 except that a 5 mass% PVA aqueous solution was used instead of the scallop PVA mixed suspension (no scallop shell powder was added). About the obtained cotton swab, the measurement of the pH of surface residence water and the presence or absence of powder fall-off were performed. The results are shown in Table 1.

<Comparative example 2>
A swab was obtained in the same procedure as in Example 1 except that the amount of scallop shell fired powder (manufactured by Natural Japan) was 2.0 g and the amount of PVA 5 mass% aqueous solution was 98.0 g (4.9 g as PVA). It was. In this example, the mass ratio of the scallop shell calcined powder to the absolutely dry mass of the cotton body corresponds to 10%. About the obtained cotton swab, the measurement of the pH of surface residence water and the presence or absence of powder fall-off were performed. The results are shown in Table 1.

The swabs of Examples 1 to 3 in which the scallop shell baked powder was adhered to the cotton body had a surface retained water pH of 12 when wet with pure water. It is known that water having such a pH exhibits an antibacterial action, a bactericidal action and a deodorizing action. Therefore, it can be judged that the cotton swabs of Examples 1 to 3 have the above-described effects.
On the other hand, the cotton swab of Comparative Example 1 in which the scallop shell fired powder was not adhered to the cotton body had a pH of 7 when wetted with pure water and did not have the above-described action.
The swab of Comparative Example 2 in which the mass ratio of the scallop shell calcined powder to the absolute dry mass of the cotton body was more than 8% by mass had a pH of 12 on the surface staying water when wet with pure water, but the powder was observed to fall off. It was inferior in practicality as a cleaning tool or a wiping tool.

Comparing Examples 1 to 3 and Comparative Example 2, when the mass ratio of the scallop shell calcined powder to the absolutely dry mass of the cotton body is in the range of 0.5 to 10%, the pH when wet with pure water is equivalent. there were.
The scallop shell calcined powder exhibits a strong pH increasing action when dissolved in water, but its solubility in water is as small as 1.19 g / L (25 ° C.). Therefore, it is considered that the above results were obtained.
Therefore, even if the content of the scallop shell calcined powder varies within the range of 0.1 to 8% by mass of the scallop shell calcined powder with respect to the dry mass of the cotton body, or the scallop shell calcined powder is excessive. Even if it is included, the difference in effect due to the scallop shell fired powder is considered to be small.

  DESCRIPTION OF SYMBOLS 1 Cotton swab, 2 axes | shafts, 3 cotton bodies, 10 Cotton swab manufacturing apparatus, 11 axis | shaft conveyance path | route, 12 axis | shaft supply part, 13 1st application part, 14 Cotton supply part, 15 Cotton body formation part, 16 2nd application part , 17 Drying unit, 20 Cotton swab manufacturing device, 21 Third coating unit, 22 Second drying unit

Claims (5)

A cotton swab comprising a shaft and a cotton body provided on at least one end of the shaft,
Sintered scallop shell powder is attached to at least the surface of the cotton body via a binder,
A cotton swab, wherein a mass ratio of the scallop shell baked powder with respect to an absolute dry mass of the cotton body is 0.1 to 8% by mass.   The cotton swab according to claim 1, wherein the binder is polyvinyl alcohol. A step of applying a first binder solution to the surface of at least one end of the shaft, bringing the cotton into contact with the surface, forming the cotton into a cotton body, and in the course of forming the cotton, Applying a second binder solution containing scallop shell baked powder on the surface and drying to form a cotton body,
The method for producing a cotton swab, wherein the coating amount of the second binder solution is such that the mass ratio of the scallop shell baked powder to the dry mass of the cotton body is 0.1 to 8% by mass. A step of applying a first binder solution to the surface of at least one end of the shaft, bringing the cotton into contact with the surface, forming the cotton into a cotton body, and in the course of forming the cotton, Applying a second binder solution to the surface and drying to form a cotton body; and applying and drying a third binder solution containing scallop shell fired powder to the cotton body; and
The method for producing a cotton swab, wherein the coating amount of the third binder solution is such that the mass ratio of the scallop shell calcined powder to the absolutely dry mass of the cotton body is 0.1 to 8 mass%. A step of applying a first binder solution to the surface of at least one end of the shaft, bringing the cotton into contact with the surface, forming the cotton into a cotton body, and in the course of forming the cotton, Applying a second binder solution to the surface and drying to form a cotton body; and applying and drying a suspension containing a scallop shell fired powder and no binder to the cotton body. Have
The method for producing a cotton swab, wherein the amount of the suspension applied is such that the mass ratio of the scallop shell baked powder to the dry mass of the cotton body is 0.1 to 8% by mass.

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