JP2003145434A - Bristle for polishing brush - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bristle material for a polishing brush having excellent polishing performance and being excellent in resistance to welding in dry polishing of rolled steel materials. SOLUTION: The bristle material for a polishing brush is featured to be formed of monofilament obtained by melting and spinning a composition containing 10-60 pts.wt. abrasive grinder particles and 0.1-5 pts.wt. azine series compound and 100 pts.wt. polyamid resin.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a bristle material for a polishing brush which is mainly used for polishing the surface of a rolled steel material or the like, and more specifically, it has excellent abrasiveness in dry polishing of the rolled steel material or the like. Alternatively, the present invention relates to a bristle material for an abrasive brush having excellent adhesion resistance, that is, a material such as a rolled bristle material that is an object to be polished does not adhere to the material of the brush bristle material.

[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 an abrasive brush used in the surface polishing of a metal such as a rolled steel material. The surface polishing process of the object to be processed is performed by pressing a roll brush, a cup brush, a tubular brush, or the like, in which the contained monofilament is used as a hair material, on the object to be processed and rotating the object.

Therefore, an excellent polishing force is required for the bristle material for polishing brushes containing abrasive particles, and in order to exert such polishing force more effectively, a synthetic resin for the bristle material for polishing brushes is required. As materials, nylon 6, nylon 66, nylon 6/66 copolymer, nylon 610, nylon 6
Polyamide resins such as 12, nylon 12 and polyester resins such as polybutylene terephthalate are selected and used according to the application of the brush.

The abrasive particles to be added to these synthetic resins include alumina-based abrasive particles represented by coke powder, bauxite, alumina oxide, etc., and silicon carbide-based abrasive particles such as white silica stone and abrasive powder. Conventionally, a monofilament obtained by melt-spinning a composition consisting of a synthetic resin and abrasive particles by selectively using artificial diamond abrasive particles and the like has been widely used as a bristle material for an abrasive brush.

By the way, the above-mentioned bristle materials for polishing brushes are mainly used for wet polishing in which a cooling liquid such as water is sprayed on a rolled steel material and the like, but a dry polishing process in which the cooling liquid is not sprayed on a rolled steel material or the like. In the case of using a conventional bristle material for a polishing brush made of polyamide resin, there is a problem that the bristle material is welded and welded due to heat generated by polishing.

For this reason, a steel brush has been mainly used for dry polishing, but the steel brush has a safety problem that it may cause injury to a human body due to breakage of the hair.

[0007] Therefore, a polishing brush made of synthetic resin, which is safe without causing hair breakage, and has a characteristic that a weld material of the hair material does not adhere to the rolled steel material or the like in the dry polishing process and is excellent in welding resistance performance. There was a strong demand for the realization of hair materials.

[0008]

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

Therefore, an object of the present invention is not only excellent in grindability in dry grinding of rolled steel, but also
It is an object of the present invention to provide a bristle material for an abrasive brush, which has excellent adhesion resistance, that is, a characteristic that a welded material of the brush bristle material does not adhere to a rolled steel material or the like to be polished.

[0010]

Means for Solving the Problems The inventors of the present invention have conducted extensive studies to achieve the above-mentioned object, and as a result, from a resin composition in which a specific amount of an azine compound is contained in a polyamide resin together with abrasive particles. It was found that the following monofilaments exhibit excellent polishing properties and welding resistance in dry polishing processing of rolled steel and the like, and reached the present invention.

That is, the bristle material for the polishing brush of the present invention is
Abrasive particles 10 per 100 parts by weight of polyamide resin
The composition is characterized by comprising a monofilament obtained by melt spinning a composition containing -60 parts by weight and 0.1-5 parts by weight of an azine compound.

In the abrasive brush hair material of the present invention, the azine compound is an azine pigment, the abrasive particles have a number # 36 to # 3000, and the polyamide resin is nylon. 6, nylon 66,
It is at least one selected from nylon 610, nylon 612, nylon 12 and nylon 6/66 copolymer, and the monofilament has a yarn diameter of 0.
It is a preferable condition that the thickness is 2 to 3.5 mm, and by applying these conditions, a more excellent effect can be obtained.

[0013]

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

The polyamide resin used in the present invention is not particularly limited, but it is particularly preferable to use nylon 6, nylon 66, nylon 610, nylon 612, nylon 12 and nylon 6/66 copolymer for toughness and polishing. It is preferable because a bristle material for a polishing brush having durability can be obtained. The relative viscosity of the polyamide resin is 3.
It is preferably 0 or more, and if the relative viscosity is less than 3.0, the stability of melt spinning and the breakage durability due to bending fatigue tend to decrease, which is not preferable.

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)
0, particularly # 60 to # 1000, is preferable because more excellent polishing property can be exhibited.

The content of the abrasive particles is 10 to 60 parts by weight, especially 15 to 100 parts by weight of the polyamide resin.
It is preferably in the range of 50 parts by weight. If the addition amount of the abrasive particles is less than the above range, the polishing force becomes insufficient,
Further, if it exceeds the above range, the strength of the melt-spun monofilament is lowered, and the breakage durability is lowered, which is not preferable.

As the azine compound used in the present invention, an azine pigment is preferably used. Specific examples of the azine-based pigment include Taoka Chemical Co., Ltd.
Examples include organic pigments such as azine blacks, azine dive blacks, azine violets, azine fast reds, azine browns, azine dark greens and azine light browns.

The above-mentioned azine compound is generally used as a coloring agent, and when blended with a polyamide resin, a bristle material for an abrasive brush colored in a desired color can be obtained, but surprisingly. In the present invention, by adding an azine compound to the polyamide resin together with the abrasive particles, a novel effect is obtained in that the adhesion resistance of the abrasive brush bristle material obtained at the same time as coloring is dramatically improved. It was found that they could be.

However, the compounding amount of the azine compound is preferably in the range of 0.1 to 5 parts by weight, particularly 0.2 to 2 parts by weight, based on 100 parts by weight of the polyamide resin. If it is less than the above range, the effect of improving the welding resistance in the polishing process is small, and if it exceeds the above range, the strength of the melt-spun monofilament is lowered, and the breakage durability tends to be lowered, which is not preferable.

The abrasive brush bristle material of the present invention is prepared by adding a necessary amount of the azine pigment as it is to the polyamide resin and mixing it, or by melting the polyamide resin and mixing the azine pigment with the polyamide resin and cooling the pellets. It can be obtained by mixing a required amount of abrasive abrasive particles with a processed product, then subjecting it to a melt spinning machine, spinning it, cooling it, and further stretching if necessary.

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 hard and difficult to bend. It is not preferable because it is difficult to plant hair.

The thus-obtained bristle material for abrading brush of the present invention has excellent abrading performance in dry abrading process of rolled steel and the like specified in JIS-G3101 (1976), and particularly has a conventional welding resistance. It exhibits the desirable performance of being far superior to.

Therefore, the bristle material for the polishing brush of the present invention is cut and aligned to a predetermined length, and is planted on a cup brush, a tubular brush, a channel brush, a disc roll brush or the like, and is mainly used for dry polishing. It can be effectively used as a brush, especially for polishing processing which requires welding resistance.

[0025]

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

The polishing amount and welding resistance in the following examples were evaluated by the methods described below. [Abrasion amount] A cup-shaped brush, in which the monofilament is planted with an inner diameter of 45 mm, an outer diameter of 70 mm, and a bristle length of 30 mm, is brought into contact with a brass metal plate while applying a surface pressure of about 120 g / cm ² while rotating at 12000 rpm. 3
Polishing work was performed for 0 minutes, and the weight of the brass metal scraped off was measured. [Welding resistance] A rolled steel material SS41 specified in JIS-G3101 (1976) having a thickness of 2 mm is formed by the cup-shaped brush in a direction approximately perpendicular to the bristle material of about 120 mm.
When the surface polishing is performed for 30 minutes while applying a surface pressure of g / cm ² and rotating at 12000 rpm,
The state of adhesion (dirt) of the deposit of the abrasive brush bristles on the surface of the steel plate was visually observed and evaluated and classified according to the following four criteria.

⊚: No adherence of weld deposits ○: Adhesion of weld deposits is slight, but hardly noticeable Δ: Adhesion of weld deposits is a little ×: Adhesion of weld deposits is large [Example 1] 100 parts by weight of nylon 610 resin (M2021 manufactured by Toray Industries, Inc.) having a relative viscosity of 3.2 was added to an azine black pigment [Adin black pigment name: Spirit Black, manufactured by Taoka Chemical Industry Co., Ltd.]. ] 7.3 parts by weight of the master pellets and the above nylon 610 resin pellets were blended to 100 parts by weight of a composition in which the content of the azine-based black pigment was 0.4% by weight.
A resin composition containing 43 parts by weight of a silicon carbide abrasive particle (Showa Denko KK) with a grain size number # 80 coated with 0.2% by weight of a silane coupling agent [SH6020 manufactured by Toray Dow Corning Silicone Co., Ltd.]. The product is subjected to a twin-screw extrusion spinning machine, melt-spun at 260 ° C. from a spinning nozzle having a hole diameter of 3.0 mm, and then drawn 3.2 times at 190 ° C. to produce a monofilament with a diameter of 1.2 mm. did.

Then, the monofilament is heated to a temperature of 20 ° C.
Table 1 shows the results of evaluating the polishing property and the welding resistance of the brush after processing the temperature and humidity for 2 days or more under the condition of the relative humidity of 65% RH and processing the brush. [Example 2] Nylon 612 resin (D having a relative viscosity of 3.6)
Egussa Co .: D22) was used, except that a monofilament having a diameter of 1.2 mm was produced under the same conditions as in Example 1, and brushed in the same manner as in Example 1, and evaluated for polishing property and welding resistance. The results of the above are also shown in Table 1. [Example 3] The content of the azine-based black pigment was set to 0.
A monofilament having a diameter of 1.2 mm was produced under the same conditions as in Example 1 except that the content was 2% by weight, and the monofilament having a diameter of 1.2 mm was brushed in the same manner as in Example 1 to evaluate the polishing property and the welding resistance. It is also shown in Table 1. [Example 4] The content of the azine-based black pigment was 2.
A monofilament having a diameter of 1.2 mm was produced under the same conditions as in Example 1 except that the content was 0% by weight, and the monofilament having a diameter of 1.2 mm was brushed in the same manner as in Example 1 to evaluate the polishing property and the welding resistance. It is also shown in Table 1. [Comparative Example 1] The content of the azine-based black pigment was set to 0.
A monofilament having a diameter of 1.2 mm was produced under the same conditions as in Example 1 except that the amount was changed to 05% by weight, and the monofilament having a diameter of 1.2 mm was brushed in the same manner as in Example 1 to evaluate the polishing property and the welding resistance. It is also shown in Table 1. [Comparative Example 2] A monofilament having a diameter of 1.2 mm was produced under the same conditions as in Example 1 except that the addition of the azine-based black pigment was omitted. Table 1 shows the results of evaluation of welding resistance.
Are also shown. [Comparative Example 3] A monofilament having a diameter of 1.2 mm was produced under the same conditions as in Example 2 except that the addition of the azine-based black pigment was omitted. Table 1 shows the results of evaluation of welding resistance.
Are also shown.

[0029]

[Table 1] As is clear from the results in Table 1, the abrasive brush bristle materials of the present invention (Examples 1 to 4) have excellent abrasiveness and welding resistance.

On the other hand, a brush material for an abrasive brush having an azine black pigment content of less than 0.1% by weight (Comparative Example 1) and a brush material for an abrasive brush not containing an azine black pigment (Comparative Examples 2 and 3). In both cases, the welding resistance performance is inferior.

[0031]

As described above, the bristle material for abrasive brushes of the present invention has excellent abrasiveness and anti-welding performance as compared with conventional bristle materials for abrasive brushes. It can be preferably used in a dry polishing process of an object to be treated such as a steel plate.

Claims (5)

[Claims] 1. 100 to 100 parts by weight of a polyamide resin, 10 to 60 parts by weight of abrasive particles and 0.
A bristle material for an abrasive brush comprising a monofilament obtained by melt spinning a composition containing 1 to 5 parts by weight. 2. The bristle material for an abrasive brush according to claim 1, wherein the azine compound is an azine pigment. 3. The abrasive abrasive particles have a count of # 36 to # 3.
It is 000, The bristle material for abrasive brushes of Claim 1 or 2 characterized by the above-mentioned. 4. The polyamide resin is at least one selected from nylon 6, nylon 66, nylon 610, nylon 612, nylon 12 and nylon 6/66 copolymer. The bristle material for an abrasive brush according to any one of 3 above. 5. 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 1-4 characterized by the above-mentioned.