WO2010101319A1

WO2010101319A1 - Toothbrush bristles with rounded tapered ends and manufacturing method thereof

Info

Publication number: WO2010101319A1
Application number: PCT/KR2009/001098
Authority: WO
Inventors: 김윤회
Original assignee: (주)알엔디지케이알
Priority date: 2009-03-05
Filing date: 2009-03-05
Publication date: 2010-09-10

Abstract

The present invention relates to toothbrush bristles made of polyester resin, wherein a tapered part which is 1/4-1/2 the length of the bristles is formed and a rounded part is formed by cutting the end of the tapered part. A method for manufacturing the toothbrush bristles comprises the steps of: a) forming a tapered part by immersing an end of a cylindrical PBT yarn in chemicals; b) cutting an end of the tapered part at a certain length; and c) and rounding the cut surface of the tapered part. The present invention prevents gums from being damaged by brushing the teeth due to the rounded tapered ends and lengthens the life of the toothbrush bristles by minimizing bending or opening of the tapered end.

Description

Bristles with rounded tapered ends and manufacturing method thereof

The present invention relates to a polyester-based bristles and a method of manufacturing the same.

Commonly used monofilament for toothbrush is manufactured from nylon. Monofilament made of nylon has the advantage of moderate elasticity and flexibility, but it is absorbed quickly, so it is quickly rubbed and maintains a constant elasticity. In order to prevent the gums from being damaged, the tip of the brush head can be mechanically rounded, and the tip can be processed into a tapered shape like a needle. Because of this, the filament cannot reach deep into the gums, which makes it difficult to remove food debris and tartar.

On the other hand, it can be used as a monofilament for toothbrush besides nylon, and polyester type compounds, such as PBT and PET, are mentioned.

PBT and PET are cheaper than nylon, are more durable, and less absorbent, making them more suitable as a bristle material than nylon.However, the strength and elasticity and flexibility are poor, which can damage gums when used as a bristle. It was a common practice to use it as an inexpensive toothbrush or to mix it with nylon for cost reduction.

In order to make use of the advantages of the PBT or PET monofilament and to supplement the disadvantages listed above, a method of tapering the end of the monofilament may be used.

As a method of tapering the polyester-based bristles, a mechanical processing method and a chemical processing method are known.

First, the mechanical processing method is a method of tapering the tip of the bristles by using a blade or a polishing machine, and there is a limitation in processing, so that a taper length cannot be made long.

In addition, the processing method using a chemical uses the principle that a part of the fiber is dissolved by immersing the polyester-based fiber in a heated caustic soda solution.

In the processing method using the same principle, after cutting the bundle of polyester series to the required length, soak the bundle about 5mm vertically in a caustic soda solution of 20% concentration and 100 ℃ or higher, and then dissolve (hydrolyze) the tip. The method of tapering the tape was introduced in Japanese Laid-Open Laboratory No. 50-40195, and in Korean Patent No. 10-0130932, a monofilament for toothbrushes in which a bristle bundle was dissolved in sulfuric acid at 80-90% concentration and 80-200 ° C temperature was tapered. Taper processing method was introduced.

When the bristles are tapered by the method using the chemicals as described above, it is possible to stably obtain a taper in the range of 1 mm-10 mm.

However, the bristles processed by the method as described above has the advantage that the tip portion has a tapered shape, such as a needle, to reach deep into the gums when brushing and easily remove food debris and tartar, etc. Because of the injuries to the gums, or easily penetrated between the gums and teeth there was a problem causing inflammation.

In addition, since the tapered end may be easily bent or deformed during use, there is a problem that the bristle bundle is opened, which causes a problem of extremely short service life of the toothbrush.

The present invention has been made to solve the problems of the prior art, to provide a rounded tapered end of the toothbrush for the rounded end treatment to prevent the gums from being damaged when brushing the rounded end to provide a method and a manufacturing method thereof. There is a purpose.

The present invention is characterized in that in the bristles for a toothbrush using a polyester-based resin, a tapered portion is formed in a range of 1/2 to 1/4 of the entire length of the bristle, and the end of the tapered portion is cut to form a round portion.

At this time, the toothbrush is preferably made of PBT material.

Toothbrush simulation method of the tapered end of the present invention is round,

a) forming a tapered portion by immersing the end of a circular columnar PBT yarn in a chemical; b) cutting the end of the tapered portion a predetermined length; And c) round processing the cut surface of the tapered portion.

Here, the drug may be an organic solvent and an inorganic solvent, and as the organic solvent, heated m-cresol, trifluoroacetic acid, o-chlorophenol, Trichlorophenol (phenol), phenol (phenol), tetrachloroethane (Tetrachloroethane) and any one selected from a mixture of phenol may be used.

As the inorganic solvent, strong alkali and strong acid may be used, and as the strong alkali, any one selected from sodium hydroxide and potassium hydroxide may be used, and as the strong acid, Sulfuric acid may be used.

In addition, the drug may be further added to the decomposition accelerator.

And, the step c) may be round processing by immersing the cutting surface in the chemical, or round processing by grinding the cutting surface in a polishing machine, or round processing by heating the cutting surface in a heating apparatus.

The present invention can produce a toothbrush with a tapered end of the rounded toothbrush prepared by the above-described method, the toothbrush is a toothbrush for which the tapered end is rounded, and the hair length is shorter than the hair length, the end is rounded It is also possible to have the round pillars planted together.

The present invention has the effect that the tapered end is rounded, thereby preventing gums from being damaged when brushing teeth.

The present invention has the effect of prolonging the service life of the bristles by minimizing the bending or opening of the tapered end.

1 is a perspective view of a toothbrush in accordance with the present invention.

Figure 2 is a front view of the toothbrush for teeth in accordance with the present invention.

Figure 3 is a flow chart showing a simulated manufacturing process for toothbrushes in accordance with the present invention.

Figure 4 is an enlarged view and detail showing a first embodiment of a toothbrush planted toothbrushes according to the present invention.

Figure 5 is an enlarged view and detail showing a second embodiment of the toothbrush planted toothbrushes according to the present invention.

100: toothbrush

110: handle portion

120: sole

130: round tapered ends

131: base

133: tapered part

135: round processing part

140: round cylinder with rounded ends

Hereinafter, with reference to the accompanying drawings for a preferred embodiment of the present invention will be described in detail.

1 is a perspective view of a toothbrush according to the present invention, Figure 2 is a front view of the hairbrush for a toothbrush according to the present invention, the toothbrush 100 of the present invention as shown in the Figure is handle portion 110 and the brush portion 120 It is configured, and the plurality of hair 130 bundles are planted in the sole portion 120, each hair 130 is manufactured using a polyester-based fiber yarn, each of the hair manufactured using the fiber ( 130 forms a cylindrical columnar base 131, and forms a tapered portion 133 for processing a predetermined section extending from the base 131 into a conical shape, the end of the tapered portion 133 It is to form a round machining portion 135 by processing the spherical shape.

At this time, the hair 130 is preferably formed in the tapered portion 133 in the 1/2 ~ 1/4 range of the entire length.

Here, the polyester resin is a general term for the polymer material having an ester bond -CO-O- in the main chain, and the polyester resin mainly used as the material of the bristles is used by polyethylene terephtalate (PET) and polybutylene terephthalate (PBT). The bristle of the present invention may be manufactured using PBT.

Figure 3 is a flow chart illustrating a simulated toothbrush manufacturing process according to the present invention, the present invention as shown in the figure is immersed in a chemically supplied PBT yarn manufactured in a circular column shape as shown in Figure 3 (a) After letting go. By dissolving only the immersed portion, the conical tapered portion 133 can be obtained as shown in (b). In this case, the portion where the tapered portion 133 is not formed forms a base 131 to be planted in the brush portion 120 of the toothbrush 100.

In this case, an organic solvent and an inorganic solvent may be used as a drug to taper the PBT yarn. First, organic solvents include heated m-cresol, trifluoroacetic acid, o-chlorophenol, trichlorophenol, phenol, tetrachloroethane (Tetrachloroethane) and a mixture of phenol can be used.

Next, inorganic solvents include strong alkalis and strong acids, and strong alkalis include sodium hydroxide, potassium hydroxide, and the like, and sulfuric acid may be used as a strong acid.

As described above, the drug may be used by diluting the stock solution with an appropriate ratio of water, and heating the drug to an appropriate temperature (100 to 150 ° C.), so that the chemical reaction in the dissolution process may be performed more quickly and stably.

Of course, to the drug may be further added to the decomposition accelerator for inducing decomposition acceleration.

At this time, the tapered portion 133 is preferably to be processed in the range of 1/2 ~ 1/4 of the entire length of the hair 130, considering that the length of the general bristle is about 12mm, it is to process to 3-6mm desirable.

The tapered processing portion 133 processed as described above may have a gum sharp when brushed because the tip is sharp and sharp. Therefore, it is necessary to maintain the inclination of the tapered portion 133 as it is so that it can easily penetrate into the tooth gap, while polishing the end of the tapered portion 133 to blunt the sharpness.

Accordingly, in the present invention, as shown in (c) of FIG. 3, the tapered portion 133 is cut to a predetermined length to remove the sharp portion, and then the cut surface is rounded into a spherical shape as in (d). Soften.

As a method for cutting the tapered portion 133, a mechanical cutting method using a blade may be used.

In addition, a method of rounding the cut surface of the tapered portion 133 may be performed by immersing the cut surface in a chemical so as to dissolve a sharp edge portion, or by grinding the cut surface with a polishing machine (not shown), or by tapering. By heating the cut surface of 133 using a heating apparatus to be melted, a method of round processing can be used.

In this case, as the drug to dissolve the cut surface, an organic solvent and an inorganic solvent as mentioned above may be used.

In addition, as a heating device for melting the cut surface, it is preferable to use a heating device that generates heat more uniformly and stably than a method of directly using a flame.

At this time, the heating temperature of the heating device is preferably maintained at 200 ~ 300 ℃ in consideration of the melting temperature of the PBT.

Figure 4 is an enlarged view and detailed view showing a first embodiment of a toothbrush is a toothbrush planted in accordance with the present invention, the toothbrush 100 as shown in the figure is a toothbrush head 130 is tapered end round treatment An example is shown only with).

Figure 5 is an enlarged view and detail showing a second embodiment of the toothbrush is a toothbrush planted in accordance with the present invention, the toothbrush 100 as shown in the figure is a toothbrush for the rounded tapered end ( 130 and an example in which a circular column hair 140, which is shorter than the toothbrush hair 130 and has a rounded end, is planted together.

Toothbrush 100 form as described above mainly serves to remove the food or tartar caught between the teeth of the toothbrush hair 130, the tapered end of the round treatment, the circular pillar hair 140 is gum The main role is to massage the role will have the advantage.

In this case, the following methods may be used as a method of forming the circular pillar hair 140.

First, by cutting a part of the raw yarn bundle to form a shorter length, and then immersing in the chemical to dissolve for the taper of the raw yarn portion, the ends of the cut yarn to be immersed together in the chemical In the process of forming the tapered portion 133, the end of the circular pillar hair 140 may be rounded.

Second, after forming the length of the unprocessed yarn bundle long, one end is first immersed in the chemical to form a tapered portion 133, the end of the tapered portion 133 is cut round processing portion 135 ), Then the other end is immersed in the drug to form a round-finished round column 140 to fold it in half, and then planted in the brush portion 120 of the toothbrush 100 can be used.

Of course, in addition to the two methods as described above, the tapered end of the round toothbrush hair 130 and the round end of the round cylindrical hair 140 processed by the respective planting method may be used.

As the present invention having the configuration and operation as mentioned above can be variously modified and changed by those skilled in the art using various embodiments through the detailed description, the true technical scope of the present invention is limited to the contents described in the detailed description of the specification. Rather, it should be determined by the claims.

Claims

In the brush for the toothbrush using a polyester-based resin,

A toothbrush hair comprising: forming a tapered portion in a range of 1/2 to 1/4 of a full length of hair, and cutting the end of the tapered portion to form a round portion.
The method of claim 1,

Toothbrush hair is a toothbrush for hair, characterized in that made of PBT material.
a) forming a tapered portion by immersing the end of a circular columnar PBT yarn in a chemical;

b) cutting the end of the tapered portion a predetermined length; And

c) round processing the cut surface of the tapered portion;

The tapered end of the round-treated toothbrush mock manufacturing method comprising a.
The method of claim 3,

The drug is a toothbrush simulation method of rounded tapered end, characterized in that an organic solvent and an inorganic solvent are used.
The method of claim 4, wherein

As the organic solvent, heated m-cresol, trifluoroacetic acid, o-chlorophenol, trichlorophenol, phenol, tetrachloroethane (Tetrachloroethane) A tapered end rounded toothbrush manufacturing method characterized in that any one selected from a mixture of phenol is used.
The method of claim 4, wherein

The inorganic solvent is strong alkaline and strong acid, characterized in that the tapered end of the round-treated toothbrush mock manufacturing method, characterized in that used.
The method of claim 6,

The strong alkali, the tapered end of the rounded toothbrush manufacturing method, characterized in that any one selected from sodium hydroxide, potassium hydroxide (potassium hydroxide) is used.
The method of claim 6,

Toothbrush simulation method of rounded tapered end, characterized in that sulfuric acid is used as the strong acid.
The method of claim 3,

The drug is a toothbrush mock manufacturing method of the tapered end is rounded treatment, characterized in that further decomposition promoter is added.
The method of claim 3,

Step c) is a mock manufacturing method for toothbrushes with a tapered end is rounded by immersing the cutting surface in the chemical.
The method of claim 3,

Step c) is a simulated manufacturing method for toothbrushes with a tapered end is rounded by grinding the cutting surface in a polishing machine.
The method of claim 3,

Step c) is a simulated manufacturing method for a toothbrush with a tapered end is rounded by heating the cut surface to the heating device.
Toothbrush is characterized in that the tapered end of the toothbrush for the round treatment.
The method of claim 13,

Toothbrush for which the tapered end is round, the toothbrush, characterized in that the hair length is shorter than the length of the hair and the end of the round-shaped round pillar is planted together.