KR100637382B1 - Brush-hairs taperprocessing method and toothbrush manufactured by this method - Google Patents

Abstract

The present invention relates to a taper processing method of the bristles and a toothbrush manufactured by this method, one of the manufacturing method of the present invention is implanted with a bristles of polyester material on the head insert, heat-sealing the hair protruding on the back surface of the head insert After fixing to the head insert, the head brush is fixed to the bristles, and then, the bristles including the step of immersing the bristles in the drug and tapering the end portion, through the present invention, the brush head without using the anchor The bristles, which can be firmly fixed, and which have been stiff in the past, have made polyester-based bristles suitable for toothbrushes of this type, which could not be used for toothbrushes with various patterns of tufts.

Ankaras, Patterns, Needles, Tapers, Head Inserts, Polyester

Description

Tapered processing method of brush head and toothbrush manufactured by this method {Brush-hairs taperprocessing method and toothbrush manufactured by this method}

1 is a plan view of a toothbrush with a conventional bristles fixed to an anchor,

Figure 2 is a plan view of the toothbrush bar is formed with a group of various patterns,

3 is a perspective view of a head insert used in the present invention,

4 is a state diagram showing a state where the bristles are planted on the head insert,

5 is a state diagram showing a state where the bristles extruded on the back of the head insert are heat-sealed;

6 is a perspective view of a head insert to which bristles are fixed,

Figure 7 is a perspective view of the fixture jig used in the present invention,

8 is a state diagram showing a state in which the head insert fixed to the bristles is coupled with the toothbrush rod,

9 is a state diagram showing a state in which the head insert in which the bristles are fixed is mounted in the mold,

10 is a state diagram showing a method of integrating the bristles bristled with a mold and a toothbrush bar.

Fig. 11 is a state diagram showing a state where the pressure releasing member is laminated on the back of the head insert.

* Explanation of symbols for main parts of the drawings

1: toothbrush, 10: head insert

20: fixture j, h: hole

s: receiving port, u: groove

The present invention relates to a method of tapering bristles and a toothbrush prepared by the method, and more particularly, to a method of tapering bristle of ancholess toothbrush and an anchorless toothbrush prepared by the method.

The conventional method of manufacturing a toothbrush with a tapered bristles is to cut a bundle of bristles (bundles) of 0.16-0.2 mm thicker than the desired length and hydrolyze the end points with an alkaline solution or a strong acid solution. After the tapered and washed with water to dry the bristle in the hole of the head of the toothbrush bar in half and transplanted together with the anchor of the metallic material as a support.

However, in recent years, as the toothbrush itself has become a fashion, various hair growth patterns are required, and as the size of the hair transplanting group is enlarged, it is impossible to plant these patterns with a conventional weaver, and it is becoming difficult to fix the bristles with anchors. .

The following three methods are used to manufacture the anchorless toothbrush.

First, the method adopted by the German company Coronet, etc., is a method of integrating the bristles and toothbrush bars by inserting the bristles into a mold and then injecting a resin.

Second, the method adopted by the US Oral Visa, etc. is a method of combining the brush head and the toothbrush rod after planting the bristles on the mold brush plate and mounting the head insert is planted in the mold and the resin is injected.

Third, unlike other companies that use spooled filament, which is a method adopted by Belgium's Boucherie, etc., it cuts the bundle of bundles to the desired length and uses a plastic head insert After the planting, the head insert is inserted into the head insert seating portion formed in the head portion of the toothbrush rod, and then the head insert and the toothbrush rod are bonded by ultrasonic waves.

Although the above methods can firmly fix the bristles to the toothbrush rods without an anchor, the apparatus is not only very expensive, but also has low production efficiency, and it is difficult to change the pattern of the tufts because the mold, the planting machine and the injection machine are integrated. Have.

However, the toothbrush manufactured by the above methods is able to implement a variety of hair transplant patterns not only excellent in aesthetic sense, but also can be freely designed to fit the different tooth structure of each race, attracting the popularity of consumers.

Toothbrushes manufactured by the above methods can not only increase the size of the tufts group in order to implement a variety of tufts, and thus it is impossible to taper the tip of the bristles by a conventional physical polishing method. . It is well known that tapering the tip of the bristles can increase the flexibility to prevent damage to the gums when brushing the teeth, as well as to improve the toothbrush efficiency by improving the penetration of the bristles.

For this reason, the toothbrush without anchor is mainly used for bristles that are wound around failure, so it is impossible to taper the bristles, so instead of tapering the tip of the bristles, such as nylon 6,10 and nylon 6,12 In order to overcome the above problems by planting a nylon material. However, nylon wool has a lack of water resistance and durability compared to polyester wool, and the untaped wool has a poor permeability, thereby deteriorating brushing efficiency. The use of polyester bristle is too stiff, making it impossible to use this type of toothbrush.

For this reason, there is a necessity of tapering the toothbrush of various hair-pattern patterns, and as described above, the method of tapering the tip of the bristles is as follows: 1) Cutting the bristle bundle (bundle) slightly longer than the desired length to give an alkaline solution or a strong acid solution. The end point is hydrolyzed and tapered, and then washed with water, and then dried by brushing the dried bristles in half in the hole of the head of the toothbrush, and then planted together with the anchor of the metallic material as a support. 2) Taper by physical method such as grinding after planting There is a method of processing, and 3) partially tapered by the method of 1), and then adding and processing the method of 2).

The method of 2) has a disadvantage in that the taper length of the obtained bristles is not short enough to impart sufficient flexibility to the bristles, and the method of 3) solves the problems of the method of 2) and at the same time reduces the processing cost. have. This method is disclosed in Korean Patent No. 261658 by the inventor.

In addition, as described in Japanese Patent No. 30276276, the bristles of the bristles that have been planted by fixing the bristles to the toothbrush with an anchor made of metal, in particular aluminum, are deposited by brushing the bristles in the alkaline solution until the core of the bristles is not decomposed. A method of tapering a part has been disclosed.

However, this method has a problem in that the alkaline solution penetrates to the anchor due to capillary phenomenon and dissolves the anchor upon deposition. When the anchor is dissolved, the seeded hair is lost, and in the mass production process, the anchor made of aluminum reacts with alkali, generating hydrogen gas, which may cause explosion of heat in the reactor. Even when the material of the anchor is changed to brass, which is widely used in recent years, the added zinc reacts with the alkaline solution to increase the strength of the brass.

For this reason, the product by this method has not been released until now, and only the products which taper the both ends of the bristles cut to a certain length and then fold it in half are planted with anchors in consideration of economic efficiency.

In addition, the toothbrush obtained by this method can be pointed out that the thickness of the tip is more than 50% of the thickness of the bristles before chemical treatment, and the taper length is only about 3mm, so that the penetration and flexibility between the teeth are insufficient. Can be. In Korean Patent No. 261658 by the present inventors, in order to solve such a problem, the brush head is immersed in the chemical until the length is shortened, and then partially tapered, and then it is planted on a toothbrush rod and then polished at the end with a cutting grinder. The diameter of the portion was set to 0.04-0.08 mm. This solved the problem of anchor corrosion and the lack of penetration and flexibility.

However, it has a common problem that various taper processing techniques disclosed so far, including the above-described patent invention by the present inventors, cannot be applied to toothbrushes having a variety of patterning groups.

In order to solve the above-mentioned problems, there is a Korean Patent No. 3073200 by the inventor. The present invention uses a single-sided cap that is tapered on one side and is 1/2 of the length of the two-sided caps instead of the two-sided capsular caps on which both sides are usually used. After pushing it into the insert rod attached to the plate through the receiving hole, fix the bristles protruding from the back of the head insert by heat fusion, and then attach the head insert with the bristles fixed to the toothbrush bar or attach the head insert to the mold. It is a method of integrating the head insert and the toothbrush bar by post injection molding.

Through the above method, the bristles can be firmly coupled to the toothbrush rods without the use of anchors. By tapering only one side, the defect rate can be significantly reduced, thereby reducing the processing cost and forming a group of tufts of various patterns.

However, the invention also 1) cut bristle bundles 15-20mm long and chemically treated to obtain a bristles of 0.01-0.03mm thick with a 4-8mm taper length, and then washed with water and dried and tied with a rubber band, When filling the wool feeder, the hair length is too short and the hair breaks out when the rubber band is peeled off. 2) The thickness is small as 0.01-0.03mm, and the height of the hair is not uniform because the tip of the hair is bent in the head insert hole by inserting rod. 3) Since the tapered and untreated areas are different from each other, even skilled workers have a problem in that they have to relax during planting.

The present invention is to solve the problems as described above, it is an object to provide a toothbrush having a group of tufts of various patterns tapered. Another object of the present invention is to provide a toothbrush with a simple manufacturing process. It is still another object of the present invention to provide a toothbrush having excellent water resistance and durability and excellent penetration between teeth. Another object of the present invention is to provide a method for manufacturing a toothbrush with a reduced defective rate.

In the manufacturing method of the present invention, the bristles of polyester material are planted in a hole formed in the mold, and then resin is injected into the mold to integrate the toothbrush rod and the bristles, and the non-tapered bristles of the bristles are immersed in the medicine to brush the bristles. It consists of taping the end of the tape.

In another method of the present invention, the bristles of a polyester material are implanted into the head insert, the hair protruding from the rear surface of the head insert is fixed by heat fusion, and then the bristles with the bristles fixed to the head insert are combined with the bristles. It consists of dipping in and tapering the end part.

Another method of the present invention, the bristles of polyester bristles to the head insert, and the hair protruding to the back of the head insert is fixed by heat-sealing, then the bristle of the head insert is fixed to the bristles of the head insert and the toothbrush rod It consists of immersing in the chemical prior to tapering the tip and then joining the head insert with the toothbrush bar. The toothbrush of the present invention has a thickness of 0.01-0.03mm and a taper length of 3.5-7.0mm. The needle-like hair made of polyester is implanted into the head of the toothbrush without an anchor. Polyester in the present invention includes polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polytrimethylene terephthalate (PTT) and the like.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a plan view of a toothbrush rod in which a conventional bristle is anchored with an anchor, and bristles are implanted in a hole h formed in the head of the toothbrush holder. The diameter of the tuft group of FIG. 1 is 1.6-4.0 mm, and when it is larger than this, it is impossible to fix with an anchor.

FIG. 2 is a plan view of a toothbrush rod having various groups of tufts of pattern formed by a method of thermally fusion bristles to the head insert 10 without injection, or by molding after injection into a mold. The group of toothbrushes by this method is not limited by size and shape because it is not fixed by anchors. Since it is not limited in size and shape, it can be planted by forming holes (h) of various patterns.

The method of the present invention is also applied to the method of coupling the head insert 10 with the bristles of the head insert 10, and then the head insert 10 and the toothbrush bar 1, the bristles are implanted in the mold and then the resin is injected to the toothbrush pole (1) At the same time forming a, it is also applied to the method of integrating the bristles and toothbrush pole (1).

The former method will be described first.

Figure 3 is a head insert 10 used in the present invention is formed with a hole (h) of various patterns, the bristles are implanted in this hole (h). The bristles to be planted may be a single posterior one, and different ones may be mixed. In the case where different thickeners are mixed, the tapering treatment may have a thicker end of various end points, and thus the effect of extending the life of the toothbrush can be expected.

In addition, bristles of other materials, such as nylon bristle, may be planted together with polyester bristle. When the bristles of different materials are planted together, the bristles of other materials are not hydrolyzed when immersed in the chemical for the taper treatment, and thus, appropriate bridging properties can be given. That is, the polyester bristles are decomposed by chemical deposition and have flexibility and permeability, and bristles of other materials do not decompose and thus have rigidity and subtractability. By adjusting these properties properly, you can get the toothbrush of the desired physical properties.

4 is a state diagram showing a state where the bristles are planted on the head insert 10, and FIG. 5 is a state diagram showing a state where the bristles protruding from the rear surface of the head insert are heat-sealed. The bristles are implanted so as to protrude 1-3 mm on the back surface of the head insert 10, and the protruding bristles are thermally fused to be fixed to the head insert 10. FIG. The head insert 10 to which the bristles are fixed is shown in FIG.

The tip portion may be tapered by dipping the bristles of the head insert 10 having the bristles fixed thereto in an acidic or alkaline solution, and then joining the bristles 1 with the bristles. A more preferable deposition method is to use a fixing jig 20 which can fix the head insert 10 as shown in FIG. Fixing jig 20 can accommodate all the bristle portion, is formed a smaller receiving port (s) than the total head insert size, the bristle is accommodated in the receiving (s) and the head insert 10 is fixed jig It is fixed to 20. When the head insert 10 is fixed to the fixing jig 20, it is easy to deposit the bristles on the medicine to a desired length.

The degree of tapering can also be completed to a desired level. Alternatively, the taper can be partially tapered and then tapered to a desired level by adding a physical method such as cutting and polishing. Regardless of the method, the thickness of the end portion is preferably 0.01-0.07 mm and the taper length is 3-7 mm.

8 is a state diagram showing a state in which the head insert 10 having the bristles fixed thereto is coupled with the toothbrush rod 1, and the head insert 10 is coupled in a manner of being fitted into the groove u formed in the toothbrush rod 1. do.

The advantage of this method is that compared to the method of integrating the bristles and toothbrush bars by directly implanting the bristles in the mold to be described later, only the head insert 10 in which the relatively small bristles are planted is tapered, at a time. A large amount of the head insert 10 can be processed, and when washing with chemicals after washing, the size is also small and advantageous, and since the back surface of the head insert 10 is exposed, the washing time can be shortened. In addition, in the case of failure, not only the entire toothbrush is removed, but only the head insert 10 is removed, so that the loss is small and the contamination of the toothbrush rod portion is prevented during processing. However, this method has a disadvantage in that it is not applicable to a product of the type in which the entire head of the toothbrush 1 is molded without being separated separately.

Another method of coupling the head insert 10 with the toothbrush rod 1 is to mount the head insert 10 having the bristles fixed thereto in a mold, and then injection molding the resin. With this method, the head insert is integrated with the toothbrush rod without any additional bonding process. If necessary, a thin plate-like pressure releasing member r may be laminated on the back surface of the head insert before injection (Fig. 11). This prevents the resin from being pushed toward the bristles by the injection pressure. 9 is a cross-sectional view showing a state in which the head insert 10 having the bristles fixed thereto is mounted on a mold.

An example of a method of integrating the bristles with the bristles while simultaneously forming a toothbrush by implanting the bristles directly to the mold, which is a method different from the above, is injected into the mold.

As shown in Korean Patent Laid-Open No. 2001-00341454 in the state in which the bristles are implanted in the mold as shown in FIG. 10, the bristles protruding into the mold are heat-sealed to seal the bristles of the mold, and the resin is sealed by pressure during injection. Detects the pressure inside the mold to prevent it from leaking toward the bristles through the planting part of the mold, stopping the injection when the pressure exceeds the set pressure value and continuing the injection again when the pressure returns to normal It is a method of integrating the bristles and toothbrush rods implanted in the mold by injection.

The toothbrush obtained by the above method is dipped in the medicine and tapered similarly to the method of using the head insert 10.

Both of the above methods can be planted unevenly so that the length of the seeded hair is varied within the range of 1-10 mm as needed. Moreover, the whole shape can also be planted in a mountain shape or a cone shape.

An embodiment of the present invention is as follows.

(Example 1)

Brushed bristles of 0.19mm thick and PTT were implanted into a mold attached to a model No. AFT CNC machine manufactured by Bocheri, Belgium.Then, the bristles were heat-sealed and the resin was injected to heat the bristles. Toothbrush was prepared.

After fixing the toothbrush to a fixture such as Fig. 7, the brush head was tapered at the end through washing, neutralization and drying process after soaking for 35 minutes in a 35% sodium hydroxide solution at 120 ° C. The brushed toothbrush was obtained, and the rear end of the bristles was 0.01-0.02 mm, and the taper length was 5-7 mm.

(Example 2)

The head insert having the bristles fixed to the bristles as shown in FIG. 6 was manufactured using a machine using the antimicrobial hair of Kanebo Co., Ltd. made of PBT material of 0.18 mm thick. As a result of the taper treatment of the head insert in the same manner as in Example 1, the rear end of the bristles was 0.01-0.03 mm, and the taper length was 4-6 mm.

The obtained head insert into which the bristle bristles were implanted was inserted into the toothbrush stand in which the head insert seat part was formed in the head part, and it bonded by the ultrasonic wave and obtained the toothbrush.

(Example 3)

Toothbrush bristles were implanted by continuously supplying a spooled filament of PBT material having a thickness of 0.203 mm (8 mils) to a fused toothbrush manufacturing device manufactured by Coronet, Germany.

The toothbrush thus obtained was fixed to a fixture such as that shown in FIG. 7, and then tapered by depositing for 10 minutes in a reactor maintained with a 95% sulfuric acid solution at 135 ℃. Subsequently, the thickness of the tip of the bristles obtained through washing, neutralizing and drying was 0.01-0.04 mm, and the taper length was 4-6 mm.

(Example 4)

PBT and polyester elastomer were mixed and extruded at a weight ratio of 7: 3, and the bristles having a thickness of 0.152mm, 0.178mm, and 0.203mm, respectively, were planted on the head insert made of plastic with the machine used in Example 1, After silver, 0.152 mm, the middle part was 0.178 mm, and the edge part was planted 0.203 mm, respectively.

After the obtained head insert was fixed to the fixture as shown in Fig. 7, 98% sulfuric acid solution was immersed in a reaction tank maintained at a temperature of 115 ° C for 10 minutes, and then taken out, and washed with water, neutralized and dried. The brushed toothbrush was obtained, the rear end of the bristles was 0.01-0.04 mm, and the taper length was 5-7 mm.

(Example 5)

The same procedure as in Example 2 was carried out except that the antimicrobial hair of Kanebo of Japan, 0.18 mm thick and the bristles of nylon material thick 0.20 mm thick were changed in a 1: 1 ratio to change the deposition time to 12 minutes. Toothbrush was prepared.

As for the bristles of the obtained toothbrush, the thickness of the driving edge of PBT material was 0.03-0.05mm, and the thickness of the nylon material was 0.20mm.

After polishing for 10 seconds with a drum-type grinder having protrusions, the bristles having a thickness of 0.01-0.02mm at the tip and a taper length of 3-5mm and a thickness of 0.10-0.15mm at the tip are 1, and the taper length is 1 Brush heads of -2mm were mixed.

Through the present invention, the bristles of the polyester-based bristle can not be used in the toothbrush formed by the bristles of various patterns due to the excessive stiffness can be fixed and fixed to the bristles without using an anchor In addition, it can be properly used, and in particular, it is possible to efficiently manufacture a toothbrush formed with a variety of patterning group without expensive equipment.

Claims (13)

Brush the polyester bristles to the head insert, heat-bond the hair protruding on the back of the head insert to fix the head insert, and then combine the head insert with the bristles fixed with the toothbrush rod, and then brush the bristles with chemicals Tapering process of the bristles including the step of tapering so that the thickness of the part is 0.001-0.007mm and the taper length is 3-7mm. Brush the polyester bristles to the head insert, fix the hair protruding on the back of the head insert to the head insert, mount the head insert with the bristles fixed on the mold, and then insert the resin into the mold. By integrating the bristles into the medicine, and tapering the bristles so that the thickness of the tip is 0.001-0.007 mm and the taper length is 3-7 mm. Brush the polyester bristles to the head insert, heat-bond the hair protruding on the back of the head insert, fix it to the head insert, and then brush the bristles of the head insert with the bristles fixed to the chemical so that the thickness of the tip is 0.001. Tapering process of the bristles including the step of coupling with a toothbrush after taping to -0.007mm and a taper length of 3-7mm. After brushing the brush head directly to the mold, the pressure relief member is laminated on the back of the head insert before injection, and then the brush head and the toothbrush rod which have been planted by injection of the resin are integrated, and then the brush head is dipped into the chemical and then the back part Is 0.001-0.007mm and the taper processing method including the step of tapering the taper length is 3-7mm. The method of any one of claims 1 to 4, wherein the bristles of polyester-based bristles and bristles of different synthetic resin materials are used. The method of claim 1, wherein the step of tapering by brushing the tip of the bristle in a physical method is added. The method of claim 2, wherein the pre-injection pressure relief member is laminated on the back surface of the head insert. The method of claim 1, wherein two or more kinds of bristles having different thicknesses are used. The method of claim 1, wherein the bristles having a thickness of 0.01-0.07 mm of the tip portion are mixed. The brush head is planted in various patterns, the brush head is fixed to the toothbrush rod without an anchor, the rear portion of the tip is 0.01-0.08mm, and the tapered bristles are tapered so that the taper length is 3-8mm. The toothbrush of claim 10, wherein the bristles having a thickness of the tip portion of 0.01-0.08 mm are planted in a mixed state. The toothbrush of claim 10, wherein the bristled bristles are polyester-based alone or a mixture of polyester-based and other synthetic resin materials. 11. The toothbrush of claim 10, wherein the bristled bristles are a mixture of tapered and non-tapered.

Images