KR102117096B1 - The brush manufacturing device by the brush which is manufactured by using this and the brush manufacturing method which is manufactured by using the softness of the dual type by using the polybutylene terephthalate thermoplastic resin - Google Patents

Abstract

The present invention relates to a method for manufacturing a brush with dual-softness using a polybutylene terephthalate (PBT) thermoplastic resin to avoid damage to the gums when a toothbrush comes in contact therewith, a brush thereof, and a brush manufacturing apparatus using the same. According to the present invention, the method comprises: an extrusion molding step (S10); a cooling step (S20); a first drawing step (S30); a first setting step (S40); a second drawing step (S50); a second setting step (S60); a third drawing step (S70); a third setting step (S80); a winding step (S90); a building step (S100); a tapering step (S110) of treating a range of 1/2 to 1/4 of the entire length of dual-type brush fiber bundled in the bundling step with a chemical product to perform tapering; and a polishing step (S120) of polishing and rounding an end of the dual type brush fiber having passed the tapering step.

Description

Method for manufacturing a brush made of dual softness using polybutylene terephthalate thermoplastic resin The brush manufacturing device by the brush which is manufactured by using this and the brush manufacturing method which is manufactured by using the softness of the dual type by using the polybutylene terephthalate thermoplastic resin}

The present invention relates to a brush manufacturing method using a polybutylene terephthalate thermoplastic resin and a brush made of dual type softness, and a brush manufacturing apparatus using the same, more specifically, polybutylene melted in an extruder. A terephthalate resin (hereinafter referred to as PBT) resin is extruded from a spinning nozzle arranged in a plurality of dual spinning holes into a dual brush yarn to wind a dewy brush formed by a continuous process of cooling, stretching and setting in winding, and then bundle Packaged with a chemical treatment of the lower part of the lower part, a taper is formed, and after cutting the end of the taper, a polybutylene terephthalate thermoplastic resin produced by rounding is used to manufacture a brush made of dual-type softness. It relates to a manufactured brush and a brush manufacturing apparatus thereby.

Polybutylene terephthalate (PBT) is widely used as an engineering plastic because it has excellent mechanical properties such as low water absorption, dimensional stability, and wear resistance and has excellent electrical properties.

In addition, it has good fluidity and excellent molding processability, making it widely used as a material for precision molded products. Recently, it has been widely used throughout industries such as electric, electronic, automotive parts, and cosmetic brushes.

In the prior literature using such PBT resin, as disclosed in Patent Registration No. 10-1385515, a tapered surface is formed within a length range of 2 to 4 mm from the tip of the brush head, and the thickness of the brush head is 10 μm or less at the end point. Each of the brush heads constituting the second set of brush heads is formed in a thin shape, and the end portions are rounded to be arc-processed or formed in a straight shape.

However, as described above, although the brush head is applied to the face wash brush to round the end of the brush, it is described so that the user's face can be smoothly touched, but the brush head is formed of a single body and divided into a plurality of brush heads at the single body end. Rather, the elasticity must be reduced.

As another prior art document, as disclosed in Korean Patent Publication No. 10-2009-0086691, a tapered portion is formed in a range of 1/2 to 1/4 of the entire length of the bristles using a polyester-based resin, and the tapered portion It is supposed to form a round processing part by cutting off the end.

However, as described above, it has been described that it is effective to prevent damage to the gums when brushing teeth by applying the rounded ends of the bristles to the bristles, but this also has a bristle formed as a single body, and multiple at the single body end. It is bound to be less elastic than the bristles divided into.

The present invention has been devised to solve the above problems, and for that purpose, the PBT resin melted in the extruder is extruded from a spinning nozzle arranged in a plurality of dual spinning holes into a dual brush yarn to cool, draw and set. The dual-type brush formed by the continuous process of winding is wound up, then packaged in a bundle to chemically treat the lower part of the processing part to form a taper, and after cutting the end of the taper, the brush produced by rounding is the end of the existing monolith. Since it is made of a dual divided into two, an item to which it is applied, for example, when using a cosmetic brush, a face-washing brush, etc., provides a soft touch to the skin and no damage to the gums when applied to a toothbrush brush.

The present invention for achieving the above object is the resin discharged by melting the polybutylene terephthalate (PBT) thermoplastic resin in the extruder (P), a brush yarn extruded from a spinning nozzle arranged in a plurality of spinning holes, the extruder (P) The extrusion molding step (S10) of continuously extruding the PBT resin heated at 200° C. to 280° C. in a spinning nozzle in which a plurality of dual-type spinning holes are arranged, and a plurality of dual-type brush yarns extruded in the extrusion molding step. In order to solidify, the lower temperature of the cooling water is 5°C to 30°C, and the cooling step (S20) in which the temperature of the water surface is set to 40°C to 50°C, the density of the dual brush yarn that has passed the process of the cooling water in the cooling step is In addition, the first stretching step (S30) for stretching to increase the crystallinity, the first setting step (S40) for drying moisture in the dual-type brush yarn that has passed the process of the first stretching step, the first setting step Secondary stretching step (S50) of stretching the dual-type brush yarn that has passed the process to increase the density and crystallinity, and secondary setting for drying moisture in the dual-type brush yarn that has passed the process of the second stretching step. Step (S60), the third stretching step (S70) of stretching the dual-type brush yarn that has passed the process of the second setting step in order to increase the density and crystallinity, and the dual-type passing the process of the third stretching step The third setting step (S80) for drying moisture in the brush yarn. And a winding step of winding the dual-type brush yarn that has passed through the process of the third setting step (S90), a bundle step of cutting and cutting the dual-type brush yarn wound in the winding step by setting dimensions according to the purpose of use. (S100), a taper step (S110) in which the taper is processed by treating it with a chemical in the range of 1/2 to 1/4 of the entire length of the dual-type brush yarn bundled in the bundle step (S110), a dual type that has passed the process of the taper step In the brush manufacturing method comprising a polishing step (S120) for polishing the end of the brush yarn by rounding,
The three-stage roller applied to each of the first stretching step (S30), the second stretching step (S50), and the third stretching step (S70) is stretched at 150 to 200% at a speed of 60 m/min to 400 m/min, and the The drying temperature of each of the first setting step (S40) and the second setting step (S60) and the third setting step (S80) is 150 to 180°C. It is characterized by being set.

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

The resin discharged by melting the polybutylene terephthalate (PBT) thermoplastic resin in the extruder (P) is heated from 200°C to 280°C by a brush yarn extruded from a spinning nozzle arranged in a plurality of spinning holes, and the extruder (P) Cooling water containing cooling water is accommodated in the dual spinning nozzle 100 extruding the PBT resin into a plurality of dual spinning holes 101 and the plurality of dual spinning brush yarns (a) extruded and molded into the dual spinning nozzle 100 Cooler 200 including an inflow guide member 202a leading to the interior of the tank 201 and a discharge guide member 202b guiding to the next process, a dual brush yarn that has passed through the process of the cooler 200 ( a) at a speed of 60 m/min to 400 m/min of the three-stage roller 301, the elongation is stretched to 150 to 200%. Primary drawer 300: Passed the process of the primary drawer 300 A primary setter 400 having a heater 401 and a blower fan 402 disposed therein to dry the moisture of the dual-type brush yarn (a) at a temperature of 150 to 180° C.; Secondary stretching machine that stretches to 150-200% by stretching the dual-type brush yarn (a) passing through the process of the primary setting machine 400 at a speed of 60 m/min to 400 m/min of the three-stage roller 501 (500): In order to dry the moisture of the dual-type brush yarn (a) that has passed the process of the secondary stretching machine 500 to a hot air temperature of 150 to 180°C, a heater 601 and a blower fan 602 are provided therein. A secondary setter 600 disposed; The third stretcher that stretches to 150 to 200% by stretching the dual-type brush yarn (a) that has passed the process of the second setter 600 at a speed of 60 m/min to 400 m/min of the three-stage roller 701 (700): In order to dry the moisture of the dual-type brush yarn (a) that has passed the process of the tertiary drawing machine 700 to a hot air temperature of 150 to 180° C., a heater 801 and a blower fan 802 are provided therein. A tertiary setter 800 disposed; A winding machine 900 driven to drive the motor 901 to wind the dual-type brush yarn (a) that has passed through the process of the tertiary setting machine 800; A bundle piece (1000) which is cut by setting the dimensions according to the purpose of use and cutting the dual-type brush yarn (a) wound on the winding machine (900) into a plurality of bundles (B); In the brush manufacturing apparatus comprising a taper processing machine (1100) to be treated with a chemical in the range of 1/2 to 1/4 of the entire length of the dual-type brush yarn (a) tied to the bundle (B),
A plurality of rotary grinding machines 1201 for grinding the ends of the dual-type brush yarns (a) that have passed through the taper machine (1100) process;

The rotary grinding machine 1201 is coated with abrasives in a stripe shape on the cylindrical drum surface, rotates around the central shaft 1202 of the rotary grinding machine 1201, and supports the shaft 1202 to support the central shaft 1202. ) Is rotated at a 360° revolution, and the particle size of the rotary polishing machine 1201 is 60 to 800# to polish the end of the dual-type brush yarn (a), thereby forming the grinding machine body 1200 and the plurality of bundles ( B) is characterized by including a conveyor belt (c) for conveying.

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

And the diameter (Ø) of the holes 101a on both sides of the plurality of dual-type radiation holes 101 is 0.6 to 0.8 mm, and the width (W) of the bridge holes 101b connecting the holes 101a on both sides is It is characterized by being formed from 0.11 to 0.14 mm.

And there is a feature that the brush is manufactured by the brush manufacturing apparatus.

In addition, a plurality of triple-type spinning holes 102 are provided in the spinning nozzle, and the diameters (Ø) of the holes 102a in both sides and the center of the triple spinning holes 102 are 0.6 to 0.8 mm, and the holes in both sides and the center ( The width W of the bridge 102b connecting 102a) is characterized by being formed from 0.11 to 0.14 mm.

In addition, a plurality of triangular spinning holes 103 are provided in the spinning nozzle, and the diameter (Ø) of the holes 103a of the triangular spinning holes 103 is 0.6 to 0.8 mm, and the bridge 103b connects the holes of the triangular arrangement. The width (W) of 0.11 ~ 0.14mm is characterized by being formed.

delete

delete

As described above, according to the present invention, the PBT resin melted in the extruder is extruded from a spinning nozzle arranged in a plurality of dual spinning holes into a dual brush yarn to wind a dual brush formed in a continuous process of cooling, stretching and setting in winding. Next, a package is packaged as a bundle, and a taper is formed by chemically treating the processing portion at the lower end, and the brush produced by the rounding process after cutting the end of the taper is divided into dual or triple items. When applied to the brush used to clean the curved surface of the monitor, scratches are drastically reduced, and when using a cosmetic brush, face-washing brush, eyebrow hair, etc. It works.

1 is a block diagram according to the manufacturing method of the present invention.
Figure 2 is an overall process diagram according to the manufacturing apparatus of the present invention.
Figure 3a is an enlarged excerpt of the dual spinning nozzle applied to the present invention.
Figure 3b is a cross-sectional view of a dual spinning nozzle applied to the present invention.
4 is an enlarged view of part a of FIG. 2.
5 is an enlarged view of part b of FIG. 2.
6A to 6B are enlarged photographs of the dual brush and dual spinning nozzles of the present invention.
7 is an enlarged excerpt of a triple spinning nozzle that is another embodiment of the present invention.
8 is a cross-sectional view of a triple spinning nozzle.
9 is an enlarged view of a triple brush made of a triple spinning nozzle.
10A to 10B are enlarged pictures of a triple brush and enlarged pictures of a triple spinning nozzle.
11 is an enlarged excerpt of a triangular spinning nozzle, which is another embodiment of the present invention.
12 is an enlarged view of a brush made of a triangular spinning nozzle.
13 is an enlarged photograph of a triangular spinning nozzle.

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

As shown in FIG. 1, the extrusion molding step (S10), the cooling step (S20), the first stretching step (S30), and the first setting step as the “dual-type manufactured brush manufacturing method” of the present invention ( S40), 2nd stretching step (S50), 2nd setting step (S60), 3rd stretching step (S70), 3rd setting step (S80), winding step (S90), bundle step (S100), taper step ( S110), the polishing step 1200 can be largely divided.

In the extrusion molding step (S10), the polybutylene terephthalate (PBT) thermoplastic resin is heated to a temperature of 200° C. to 280° C. and the molten resin is spun with a spinning nozzle in which a plurality of dual spinning holes are arranged to dual-brush the yarn. Is extruded.

The dual-type brush yarn that has been formed by passing in the extrusion molding step (S10) is solidified by moving in the cooling step (S20), wherein the temperature of the cooling water in the cooling step (S20) is 5° C. to 30° C. , And the temperature of the water surface is distributed at 40°C to 50°C.

The dual-type brush yarn solidified in the cooling step (S20) is transferred to the first stretching step (S30) and stretched. At this time, the elongation is 150 to 200% at a speed of 60 m/min to 400 m/min of the three-stage roller. It is stretched.

The dual-type brush yarn that is first stretched in the first stretching step (S30) is transferred to the first setting step (S40) and dried by a heater having a temperature of 150 to 180°C.

The dual-type brush yarn dried first in the first setting step (S40) is transferred to the second stretching step (S50) and stretched at a speed of 60m/min to 400m/min of a three-stage roller under the same conditions as the first step. Is stretched to 150-200%.

The dual-type brush yarn that is secondarily stretched in the second stretching step (S50) is transferred to the second setting step (S60) and dried by a heater having a temperature of 150 to 180° C. under the same conditions as the first.

The dual-type brush yarn dried second in the second setting step (S60) is transferred to the third stretching step (S70) and stretched at a speed of 60m/min to 400m/min of the roller under the same conditions as in the first and second steps. Is stretched to 150-200%.

The dual-type brush yarn stretched third in the third stretching step (S70) is transferred to the third setting step (S80) and dried by a heater having a temperature of 150 to 180° C. under the same conditions as the first and second.

As described above, a plurality of dual-type brush yarns that have passed the repetition of stretching and setting are wound in the winding step (S90), and then cut with a cutter (not shown) according to the dimensions of the brush according to the purpose of use. Bundled in a plurality of bundles in the bundling step (S100), then as an organic solvent in the range of 1/2 to 1/4 of the total length of the dual brush yarn, heated m-cresol, trifluoro acetic acid (trifluoroacetic acid), o-chlorophenol, trichlorophenol, phenol, tetrachloroethane and a mixture of phenol selected from any one of the selected chemicals to form a taper To be transferred to the taper step (S110), the dual-type brush yarn tapered in the taper step (S110) is transferred to the polishing step 120 to form an arc rounding the tapered end.

As shown in Figure 2 of the accompanying drawings of the present invention, as the "brush manufacturing apparatus" of the present invention

Extruder (P), spinning nozzle (100), cooler (200), primary stretching machine (300), primary setting machine (400), secondary stretching machine (500), secondary setting machine (600), tertiary stretching machine It can be largely divided into 700, tertiary setting machine 800, winding machine 900, bundle piece 1000, taper processing machine 1100, and polishing machine 1200.

The PBT resin is heated to 200°C to 280°C in the extruder (P), and the molten resin is transferred to the dual-type spinning nozzle 100 and extruded into a plurality of dual-type spinning holes 101 to provide dual-type brush yarn ( a) is molded.

Here, the diameter (Ø) of the holes 101a on both sides of the dual-type radiation hole 101 is 0.6 to 0.8 mm, and the width (W) of the bridge holes 101b connecting the holes 101a on both sides is 0.11 to It is formed of 0.14mm.

Since the dual brush yarn (a) is transferred to the cooler 200 process and solidified, in order to induce the dual brush yarn (a) into the cooling water tank 201 of the cooler 200, the cooling water It consists of an inflow guide member 202a inside the tank 201 and an exhaust guide member 202b for guiding the solidified dual-type brush yarn a into the cooling process in the next process.

The primary stretching machine 300 is composed of a three-stage roller 301 that allows the elongation rate to be stretched to 150 to 200% by using a dual-type brush yarn (a) at a speed of 60 m/min to 400 m/min.

The primary setter 400 is composed of a heater 401 and a blower fan 402 disposed therein to dry the moisture contained in the dual-type brush yarn (a) to a hot air temperature of 150 to 180°C.

 The secondary stretching machine 500 is composed of a three-stage roller 501 that stretches the elongation at 150-200% by using a dual-type brush yarn (a) at a speed of 60 m/min to 400 m/min.

The secondary setter 600 is configured with a heater 601 and a blower fan 602 disposed therein to dry the moisture contained in the dual-type brush yarn (a) to a hot air temperature of 150 to 180°C.

The tertiary stretching machine 700 is composed of a three-stage roller 701 that allows the elongation to be stretched to 150 to 200% by using a dual-type brush yarn (a) at a speed of 60 m/min to 400 m/min.

The tertiary setter 800 is composed of a heater 801 and a blower fan 802 disposed therein to dry the moisture contained in the dual-type brush yarn (a) to a hot air temperature of 150 to 180°C.

The winding machine 900 is configured such that the motor 901 is disposed at one end to wind the dual-type brush yarn (a) that has passed through the process of the tertiary setting machine 800.

The bundle piece 1000 is composed of a bundle (B) that is cut into a plurality of packages by cutting (not shown) by setting dimensions according to the purpose of use of the dual-type brush yarn (a) wound on the winding machine (900).

The bundle piece 1000, the taper processing machine 1100, and the polishing machine 1200 have a structure in which a plurality of bundles B are seated and circulated in one conveyor belt c.

The inside of the tank 1101 of the taper processing machine 1100 is immersed in the range of 1/2 to 1/4 of the entire length of the dual-type brush yarn (a) in a plurality of bundles (B), and is used as a chemical to be tapered It is.

Here, the drug is an organic solvent, heated m-cresol, trifluoroacetic acid, o-chlorophenol, trichlorophenol, phenol, tetra The taper is molded by treating with any one selected from a mixture of chloroethane and phenol.

The polishing machine main body 1200 is provided with a plurality of rotary grinding machines 1201 so that the ends of the dual brush yarns (a) can be molded by rounding.

Here, the rotary grinding machine 1201 is coated with abrasives in a stripe shape on the surface of the cylindrical drum, and the rotary grinding machine 1201 rotates around the central shaft 1202 and supports the central shaft 1202 A revolution is made by rotating the supporter 1203 at 360°.

As described above, the end of the dual-type brush yarn (a) is polished by contact with the rotating and rotating rotary grinding machine 1201.

In addition, the particle size of the rotary grinding machine 1201 is #2000 or less, preferably about #60 to #800.

  Although the present invention has been described with reference to the accompanying drawings and the preferred embodiments described above, the present invention is not limited thereto, but is limited by the claims below. Therefore, those of ordinary skill in the art can variously modify and modify the present invention without departing from the technical spirit of the claims to be described later.

P: Extruder 100: Spinning nozzle
200: cooler 300: primary stretching machine
400:, 1st setting machine 500: 2nd stretching machine
600: 2nd setting machine 700: 3rd stretching machine
800: 3rd setting machine 900: Winding machine
1000: Bundle flight 1100: Taper processing machine
1200: grinding machine

Claims (13)

The extrusion molding step (S10) of continuously extruding the PBT resin heated at 200°C to 280°C in an extruder (P10) in a spinning nozzle in which a plurality of dual-type spinning holes are arranged, and a plurality of extrusion-molded steps in the extrusion molding step. In order to solidify the dual-type brush yarn , the lower temperature of the cooling water is 5°C to 30°C, and the cooling step (S20) in which the water surface temperature is set to 40°C to 50°C, the dual-type brush that has passed the process of cooling water in the cooling step Primary stretching step (S30) for stretching the yarn to increase the crystallinity with density, primary setting step (S40) for drying moisture in the dual-type brush yarn that has passed the process of the primary stretching step (S40), 1 Secondary stretching step (S50) of stretching the dual-type brush yarn that has passed the process of the secondary setting step to increase the density and crystallinity, and drying moisture in the dual-type brush yarn that has passed the process of the secondary stretching step. For the second setting step (S60), the third stretching step (S70) for stretching the dual-type brush yarn that has passed the process of the second setting step to increase the density and crystallinity, the process of the third stretching step The third setting step (S80) for drying moisture on the dual-type brush yarn that has passed. And a winding step of winding the dual-type brush yarn that has passed through the process of the third setting step (S90), a bundle step of cutting and cutting the dual-type brush yarn wound in the winding step by setting dimensions according to the purpose of use. (S100), a taper step (S110) in which the taper is processed by treating it with a chemical in the range of 1/2 to 1/4 of the entire length of the dual-type brush yarn bundled in the bundle step (S110), a dual type that has passed the process of the taper step In the brush manufacturing method comprising a polishing step (S120) for polishing the end of the brush yarn by rounding,
The three-stage roller applied to each of the first stretching step (S30), the second stretching step (S50), and the third stretching step (S70) is stretched at 150 to 200% at a speed of 60 m/min to 400 m/min, and the The drying temperature of each of the first setting step (S40), the second setting step (S60), and the third setting step (S80) is set to 150 to 180°C, using polybutylene terephthalate (PBT) thermoplastic resin. How to make a dual brush. delete delete delete delete delete A dual-type spinning nozzle 100 extruding PBT resin heated at 200°C to 280°C by a plurality of dual-type spinning holes 101 by an extruder (P), extruded into the dual-type spinning nozzle 100, and molded Cooler 200 including an inlet guide member 202a for guiding a plurality of dual-type brush yarns (a) into a coolant tank 201 containing coolant and an exhaust guide member 202b for guiding to the next process, the cooler The primary stretcher 300 that stretches at 150-200% elongation by using the dual-type brush yarn (a) having passed the process of (200) at a speed of 60 m/min to 400 m/min of the three-stage roller 301: The primary with the heater 401 and the blower fan 402 disposed therein to dry the moisture of the dual-type brush yarn (a) that has passed the process of the primary stretching machine 300 to a hot air temperature of 150 to 180°C. A setter 400; Secondary stretching machine that stretches to 150-200% by stretching the dual-type brush yarn (a) passing through the process of the primary setting machine 400 at a speed of 60 m/min to 400 m/min of the three-stage roller 501 (500): In order to dry the moisture of the dual-type brush yarn (a) that has passed the process of the secondary stretching machine 500 to a hot air temperature of 150 to 180°C, a heater 601 and a blower fan 602 are provided therein. A secondary setter 600 disposed; The third stretcher that stretches to 150 to 200% by stretching the dual-type brush yarn (a) that has passed the process of the second setter 600 at a speed of 60 m/min to 400 m/min of the three-stage roller 701 (700): In order to dry the moisture of the dual-type brush yarn (a) that has passed the process of the tertiary drawing machine 700 to a hot air temperature of 150 to 180° C., a heater 801 and a blower fan 802 are provided therein. A tertiary setter 800 disposed; A winding machine 900 driven to drive the motor 901 to wind the dual-type brush yarn (a) that has passed through the process of the tertiary setting machine 800; A bundle piece (1000) which is cut by setting the dimensions according to the purpose of use and cutting the dual-type brush yarn (a) wound on the winding machine (900) to a plurality of bundles (B); In the brush manufacturing apparatus comprising a taper processing machine (1100) to be treated with a chemical in the range of 1/2 to 1/4 of the entire length of the dual-type brush yarn (a) tied to the bundle (B),
A plurality of rotary polishing machines 1201 for polishing the ends of the dual-type brush yarns (a) that have passed through the taper machine (1100) process;
The rotary grinding machine 1201 is coated with abrasives in a stripe shape on the cylindrical drum surface, rotates around the central shaft 1202 of the rotary grinding machine 1201, and supports the shaft 1202 to support the central shaft 1202. ) Is rotated at a 360° revolution, and the particle size of the rotary polishing machine 1201 is 60 to 800# to polish the end of the dual-type brush yarn (a), thereby forming the grinding machine body 1200 and the plurality of bundles ( B) a brush manufacturing apparatus comprising a conveyor belt (c) for conveying. The method of claim 7,
The diameter (Ø) of the holes 101a on both sides of the plurality of dual-type spinning holes 101 is 0.6 to 0.8 mm, and the width (W) of the bridge holes 101b connecting the holes 101a on both sides is 0.11. Brush manufacturing apparatus characterized in that formed of ~0.14mm. A brush produced by the brush manufacturing apparatus of claim 7. The method of claim 7,
A plurality of triple-type spinning holes 102 are provided in the spinning nozzle, and the diameter (Ø) of the holes 102a at both sides and the center of the triple spinning holes 102 is 0.6 to 0.8 mm, and the holes at both sides and the center ( The width (W) of the bridge (102b) connecting the 102a) is a brush manufacturing apparatus characterized in that formed in 0.11 ~ 0.14mm. delete The method of claim 7,
A plurality of triangular spinning holes 103 are provided in the spinning nozzle, and the diameter (Ø) of the holes 103a of the triangular spinning holes 103 is 0.6 to 0.8 mm, and of the bridge 103b connecting the holes of the triangular arrangement. Width (W) is a brush manufacturing apparatus characterized in that formed in 0.11 ~ 0.14mm.

. delete

Images