JP2003039335A - Bristle for polishing brush - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bristle for a polishing brush in which the surface polishing property of a work is more excellent than that by a conventional brush. SOLUTION: The bristle for the polishing brush is formed of a mono filament obtained by melt-spinning a composition containing 10-50 pts.wt. grinding abrasive grains in 100 pts.wt. polyester resin containing >=60 mol.% of ethylene-2,6- naphthalate unit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a bristle material for a polishing brush, which is mainly used for polishing the surface and end surface of an object to be treated such as metal. More specifically, the surface abrasiveness of the object to be treated is improved. The present invention relates to a bristle material for an abrasive brush, which is far superior to the conventional one.

[0002]

2. Description of the Related Art Conventionally, a monofilament made of a synthetic resin containing abrasive particles has been known as a bristle material for a polishing brush used for polishing the surfaces and end faces of a metal such as a steel plate. Polishing Abrasive Particle-containing monofilaments are used as bristle materials. Rolled brushes, cup brushes, and cylindrical brushes are pressed against the object to be processed, and by applying rotation, surface polishing of the object and deburring and polishing of the end surface are performed. Is being done.

Therefore, a bristle material for a polishing brush composed of a monofilament containing abrasive particles is required to have excellent polishing power.

Therefore, for the purpose of developing a better polishing power, nylon 6, nylon 66, nylon 6/66 copolymer, nylon 61 are used as monofilament materials.
2. A synthetic resin selected from polyamide resins such as 2, nylon 610 and nylon 12, and polyester resins such as polybutylene terephthalate is selected, and the polishing abrasive particles are represented by coke powder, bauxite, alumina oxide and the like. Alumina-based abrasive particles, white silica stone,
A bristle material for a polishing brush composed of a monofilament obtained by melt-spinning a composition composed of a silicon carbide-based abrasive particle such as an abrasive powder and an artificial diamond abrasive particle has been widely used.

By the way, recently, further efficiency of polishing has been required, and shortening of polishing time has become a problem especially in the polishing process of metal materials for mechanical parts.
In the conventional bristle materials for polishing brushes, the lack of polishing performance is regarded as a problem, and there has been a strong demand for the realization of bristle materials for polishing brushes with further improved polishing power.

[0006]

SUMMARY OF THE INVENTION The present invention has been achieved as a result of studying the solution of the above-mentioned problems in the prior art.

Accordingly, an object of the present invention is to provide a bristle material for a polishing brush, which has a surface polishing property of an object to be treated far superior to the conventional one.

The inventors of the present invention have conducted extensive studies to achieve the above object, and as a result, in a synthetic resin monofilament containing abrasive particles, a polyester resin containing a specific amount of ethylene-2,6-naphthalate units. In addition, the inventors of the present invention have found that the abrasive particles containing abrasive particles exhibit particularly excellent surface polishability, and have reached the present invention.

[0009]

In order to achieve the above object, a bristle material for an abrasive brush of the present invention comprises ethylene-2,6.
-Abrasive abrasive particles of 10 to 5 with respect to 100 parts by weight of a polyester resin containing a naphthalate unit of 60 mol% or more
It is characterized by comprising a monofilament obtained by melt spinning a resin composition containing 0 part by weight.

In the bristle material for a polishing brush of the present invention, the number of the polishing abrasive particles is # 36 to # 3000 and the yarn diameter of the monofilament is 0.2 to.
3.5 mm is a preferable condition for all, and by applying these conditions, a more excellent effect can be obtained.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The bristle material for an abrasive brush of the present invention will be described in detail below.

The polyester resin used in the present invention is a polymer containing ethylene-2,6-naphthalate units in an amount of 60 mol% or more and an intrinsic viscosity of 0.5 or more, preferably 0.6 or more.

A specific example of this polyester resin is a polyethylene naphthalate resin. The polyethylene naphthalate resin can contain other dicarboxylic acid components and diol components as long as it is less than 40 mol%. Examples of the other dicarboxylic acid component here include:
Terephthalic acid, isophthalic acid, phthalic acid, diphenyl dicarboxylic acid, diphenyl ether dicarboxylic acid, diphenyl sulfone dicarboxylic acid, benzophenone dicarboxylic acid and phenylindane dicarboxylic acid, and other diol components include ethylene glycol, propylene glycol, tetramethylene glycol, Examples thereof include pentamethylene glycol, hexamethylene glycol, octamethylene glycol, decamethylene glycol, neopentylene glycol, cyclohexanediol and cyclohexanedimethanol, and these can be used in combination of two or more kinds.

Among them, the polyester resin is a copolymer containing ethylene-2,6-naphthalate units together with ethylene terephthalate units and / or tetramethylene terephthalate units as 8 to 40 mol%, particularly 8 to 35 mol% as a copolymerization component. When polyester is used, pellets can be easily molded, melt spinning is excellent in stability, and a monofilament having desired polishing performance can be stably obtained, which is a preferable effect.

However, in the polyester resin, when the ethylene-2,6-naphthalate unit is less than 60 mol%, the rigidity of the obtained monofilament is lowered and it becomes difficult to achieve the desired polishing performance, which is preferable. Absent.

Further, the polyester resin used in the present invention includes polyethylene terephthalate, polymethylene terephthalate, polytetramethylene terephthalate, polypropylene terephthalate, polymethylene naphthalate, polytetramethylene naphthalate, polypropylene naphthalate, and their main components. If necessary, the copolyester and the like may be blended at a ratio of 40% by weight or less and used as long as the object of the present invention is not impaired.

The abrasive particles used in the present invention include:
Alumina oxide, silicon carbide, artificial diamond, etc. can be mentioned, but their count is abrasive grain size JISR.
# 36 to # 300 specified in 6001 (1973)
It is preferably 0, particularly in the range of # 60 # to # 1000.

The content of the abrasive particles is 10 to 50 parts by weight, especially 15 to 100 parts by weight of the polyester resin.
It is preferably in the range of 40 parts by weight. If the addition amount of the abrasive particles is less than the above range, the polishing force will be insufficient, and if it exceeds the above range, the strength of the monofilament will be decreased, and the breakage durability will be decreased, which is not preferable.

The monofilament as the bristle material for the polishing brush of the present invention is prepared by mixing the above polyester resin with a required amount of polishing abrasive particles, and then subjecting it to a melt spinning machine, spinning it and then cooling it. It is obtained by stretching accordingly.

The cross-sectional shape of the thus obtained monofilament can be elliptical, triangular, rectangular and other irregular shapes other than circular.

The average diameter of the monofilament is 0.2 to
A range of 3.5 mm, especially 0.4 to 3.0 mm is suitable. Here, if the diameter of the monofilament is less than the above range, the fluff is too weak and the polishing effect is small, and if it exceeds the above range, the fluff is too strong and it is hard to bend, and for example, it is bent to a disc plate or the like. It is not preferable because hair transplantation becomes difficult.

The thus-obtained bristle material for abrading brush of the present invention exhibits a preferable performance that the surface abradability of an object to be abraded is far superior to the conventional one.

Therefore, the bristle material for an abrasive brush of the present invention is cut and trimmed to a predetermined length, and is bristled into a channel, a disc roll or the like to obtain a brush such as a cup brush, a tubular brush or a rotary brush.
It can be effectively used for polishing processing that requires high polishing properties.

[0024]

EXAMPLES The constitution and effects of the present invention will be further described below with reference to examples.

The polishing amount, dry bending hardness and polishing property in the following examples were evaluated by the methods described below. [Abrasion amount] Monofilament 45mm inner diameter, 75 outer diameter
mm, brush length 30 mm, cup-shaped brush 36
The brass metal plate was brought into contact with the brass metal plate while applying a surface pressure of 1 kg while rotating at a rotation speed of 00 rpm, and polishing work was performed for 30 minutes, and the weight of the brass metal scraped off by polishing was measured. [Dry Bending Hardness] Two stainless steel bars having a diameter of 1 mm were fixed in parallel at an interval of 1 cm, and a monofilament having a length of about 7 cm was hooked on a hook at the tip of the stainless steel bar and passed through between the stainless steel bars. The maximum value (g) of the bending stress of the monofilament was measured and defined as the bending hardness. [Abrasivity] The surface of the brass metal plate polished and polished in the above evaluation of the polishing amount was visually observed, and the finished state was evaluated and classified into the following three criteria.

⊚: Very good ◯: Good Δ: Slightly bad Example 1 Ethylene-2,6-naphthaterate unit 9
Polyethylene naphthalate resin [Polymer A] composed of 2 mol% and ethylene terephthalate unit of 8 mol% (intrinsic viscosity 0.83 ... PN550 manufactured by Toyobo Co., Ltd.) was added to 100 parts by weight of silicon carbide abrasive particles of particle size # 80 (Showa era). The composition to which 35 parts by weight of Denko Co., Ltd.) was added was subjected to a twin-screw extrusion spinning machine, melt-spun at 300 ° C. from a spinning nozzle having a pore size of 3.0 mm, and then stretched at 200 ° C. to 6.0 times. A monofilament having a diameter of 1.2 mm was manufactured. Example 2 Ethylene-2,6-naphthaterate unit 7
5 mol% and ethylene terephthalate unit 25 mol%
Except that the polyethylene naphthalate resin [Polymer B] consisting of was used under the same conditions as in Example 1 with a diameter of 1.2.
mm monofilaments were produced. Example 3 Ethylene-2,6-naphthaterate unit 6
5 mol% and ethylene terephthalate unit 35 mol%
A monofilament having a diameter of 1.2 mm was produced under the same conditions as in Example 1 except that the polyethylene naphthalate resin [Polymer C] was used. [Comparative Example 1] Ethylene-2,6-naphthaterate unit 5
0 mol% and ethylene terephthalate unit 50 mol%
Under the same conditions as in Example 1 except that the polyethylene naphthalate resin [Polymer D] was used.
mm monofilaments were produced. [Comparative Example 2] Instead of polyethylene naphthalate resin,
Nylon 6 resin (relative viscosity: 4.1, Toray M104
1) is used, the spinning temperature is 280 ° C., and the stretching temperature is 190.
A monofilament having a diameter of 1.2 mm was produced under the same conditions as in Example 1 except that the temperature and the draw ratio were changed to 3.0 times. [Comparative Example 3] Instead of polyethylene naphthalate resin,
Same as Example 1 except that nylon 612 resin (relative viscosity: 3.6, D22 manufactured by Huls) was used, the spinning temperature was 270 ° C., the stretching temperature was 190 ° C., and the stretching ratio was 3.0 times. A monofilament having a diameter of 1.2 mm was manufactured under the conditions of. [Comparative Example 4] Instead of polyethylene naphthalate resin,
Polybutylene terephthalate resin (relative viscosity: 1.5,
s4; 1500S manufactured by the company, and using a spinning temperature of 270
A monofilament having a diameter of 1.2 mm was produced under the same conditions as in Example 1 except that the temperature was adjusted to 190 ° C, the drawing temperature was changed to 190 ° C, and the draw ratio was changed to 3.2 times.

Table 1 shows the results of evaluation of the polishing amount, dry bending hardness and polishing property of each monofilament obtained in Examples 1 to 3 and Comparative Examples 1 to 4.

[0028]

[Table 1] As is clear from the results in Table 1, the polishing brush bristle materials of the present invention (Examples 1 to 3) have particularly excellent polishing performance as compared with conventional products.

On the other hand, a bristle material for a polishing brush (Comparative Example 1) made of a monofilament using a polyester resin (Polymer D) having an ethylene-2,6-naphthalate unit of 60 mol% or less has a bristle (flexural hardness). The polishing performance was inferior.

Further, the brush material for polishing brushes (Comparative Examples 2 to 4) composed of monofilament using nylon 6, nylon 612, and polybutylene terephthalate resin, which are typical materials for conventional polishing brush hair materials, is The abrasiveness was inferior to that of the abrasive brush bristle material of the invention (Examples 1 to 3).

[0031]

As described above, the abrasive brush bristle material of the present invention has a particularly excellent polishing performance as compared with the conventional abrasive bristle material, and is suitable for use with steel plates, metal materials for machine parts and the like. It can be preferably used for polishing of the surface and the end surface of the object to be treated.

Front page continuation (51) Int.Cl. ⁷ Identification code FI theme code (reference) // C08L 67:02 C08L 67:02 F term (reference) 3C063 AA07 AB09 BC03 BG10 BH04 CC30 EE29 FF08 4F071 AA45 AB03 AB11 AB18 AB29 AD02 AD06 AE13 AH19 DA17 4L035 BB31 DD14 FF02 GG03 KK10

Claims (3)

[Claims] 1. A monofilament obtained by melt-spinning a composition containing 10 to 50 parts by weight of abrasive particles per 100 parts by weight of a polyester resin containing 60 mol% or more of ethylene-2,6-naphthalate units. A bristle material for an abrasive brush, which is characterized in that 2. The abrasive abrasive particles have a count of # 36 to # 3.
It is 000, The bristle material for abrasive brushes of Claim 1 characterized by the above-mentioned. 3. The yarn diameter of the monofilament is 0.2 to
It is 3.5 mm, The bristle material for abrasive brushes of any one of Claims 1-2 characterized by the above-mentioned.