JP2004058184A - Bristle material for polishing brush - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bristle material for a polishing brush having superior polishing performance and welding resistance in particular in a dry polishing work of a special steel such as a stainless steel plate. <P>SOLUTION: This bristle material for the polishing brush comprises mono-filament formed by melting and spinning components including abrasive grains of 5-40 wt.% and fluororesin of 3-25 wt.% relative to polyamide resin such as nylon 6, nylon 66, nylon 610, nylon 612, nylon 12 or nylon 6/66 copolymer. <P>COPYRIGHT: (C)2004,JPO

Description

【００２５】
表１の結果から明らかなように、本発明の研磨ブラシ用毛材（実施例１〜４）は、従来の研磨ブラシ用毛材（比較例１〜３）よりも明らかに優れた耐溶着性能を有している。
【００２６】
【発明の効果】
以上説明したように、本発明の研磨ブラシ用毛材は、ステンレス鋼板などの特殊用鋼の乾式研磨加工において、研磨性に優れると共に、耐溶着性にも優れるという従来にない特性を発揮するものである。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an improvement in a bristle material for a polishing brush mainly used for polishing the surface of special steel such as a stainless steel plate, and more particularly, it is excellent in abrasion in dry polishing of special steel such as a stainless steel plate. In this case, the present invention relates to a bristle material for a polishing brush which is also excellent in a property that a welded material of the bristle material for a polishing brush does not adhere to the surface of the object to be polished (welding resistance).
[0002]
[Prior art]
Conventionally, as a bristle material for a polishing brush used in a surface polishing process of a metal steel plate, a monofilament made of a synthetic resin containing polishing abrasive particles is known. The surface of the metal to be processed is polished by pressing a roll brush, a cup brush, a cylindrical brush, or the like against the workpiece and applying rotation thereto.
[0003]
Therefore, a bristle material for a polishing brush composed of a monofilament containing abrasive particles is required to have excellent polishing power, and in order to satisfy such required characteristics, nylon 6, nylon 66, Various attempts have been made to select the most suitable material from synthetic resins such as polyamide resins such as nylon 6/66 copolymer, nylon 610, nylon 612 and nylon 12 and polyester resins such as polybutylene terephthalate. I have.
[0004]
By the way, the bristle material for the polishing brush made of the above-mentioned abrasive abrasive particle-containing monofilament is mainly used in a wet polishing method for polishing a metal steel plate such as an iron plate or an aluminum plate while spraying a cooling liquid such as water on the steel plate. When applied to the dry polishing method that does not spray liquid, it can be used without problems for iron plates and aluminum plates, but special steel such as stainless steel plate generates a large amount of heat due to polishing. There is a problem in that the welded material of the bristle material for the polishing brush adheres to the surface, and the polished surface is significantly contaminated.
[0005]
Therefore, in the dry polishing of special steel such as stainless steel plate, there is no danger due to the scattering of the bristle material, and it has excellent abrasion properties, and at the same time, the deposited material of the bristle material for the polishing brush does not adhere to the surface of the object to be polished. There has been a strong demand for a bristle material for a polishing brush made of a synthetic resin monofilament containing polishing abrasive particles which is also excellent in the following (hereinafter referred to as welding resistance).
[0006]
[Problems to be solved by the invention]
The present invention has been achieved as a result of studying solving the problems in the above-described conventional technology.
[0007]
Accordingly, an object of the present invention is to provide a bristle material for a polishing brush which is excellent in abrasion and excellent in welding resistance in dry polishing of special steel such as a stainless steel plate.
[0008]
[Means for Solving the Problems]
The present inventors have conducted intensive studies in order to achieve the above object, and found that when abrading abrasive particles were contained in a polyamide resin, a composition containing a specific amount of a fluorine-based resin together with the polishing abrasive particles was melted. The present inventors have found that the spun monofilament is effective for achieving both abrasion resistance and welding resistance in dry polishing of a stainless steel plate, and have reached the present invention.
[0009]
That is, the bristle material for a polishing brush of the present invention is obtained from a monofilament obtained by melt-spinning a resin composition containing 5 to 40% by weight of abrasive particles and 3 to 25% by weight of a fluorine resin with respect to a polyamide resin. It is characterized by becoming.
[0010]
In the bristle material for the polishing brush of the present invention,
The polyamide resin is at least one selected from nylon 6, nylon 66, nylon 610, nylon 612, nylon 12, and nylon 6/66 copolymer;
Preferably, the count of the abrasive particles is in the range of # 36 to # 3000, and the yarn diameter of the monofilament is 0.2 to 3.5 mm, and these conditions are applied. By doing so, more excellent effects can be obtained.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the bristle material for a polishing brush of the present invention will be described in detail.
[0012]
There is no particular limitation on the polyamide resin used in the present invention. Among them, nylon 6, nylon 66, nylon 610, nylon 612, nylon 12, and nylon 6/66 copolymer have both toughness and polishing durability. Is preferably used. These polyamide resins preferably have a relative viscosity of at least 3.0 measured at 25 ° C. using a Ostwald viscometer for a solution obtained by dissolving 0.25 g of the polymer in 25 cc of 98% sulfuric acid, and preferably have a relative viscosity of less than 3.0. In such a case, an undesirable tendency such as a decrease in stability of melt spinning or a decrease in breakage durability due to bending fatigue resistance may occur.
[0013]
Examples of the fluorine-based resin used in the present invention include polyvinylidene fluoride, polytetrafluoroethylene, tetrafluoroethylene / ethylene copolymer, tetrafluoroethylene / hexafluoropropylene copolymer, and tetrafluoroethylene / perfluoroalkylvinyl ether copolymer. And a tetrafluoroethylene / hexafluoropropylene / vinylidene fluoride copolymer. The viscosity of these fluororesins is not particularly limited, but the melt index value measured by the ASTM D-1238 method (at a temperature of 300 ° C. and a load of 2160 g) of 1 to 16 g / 10 minutes is considered to be uniform for the polyamide resin. It is preferable in that it can be dispersed.
[0014]
The compounding amount of these fluorine-based resins with the polyamide-based resin is preferably in the range of 3 to 25% by weight, particularly 5 to 20% by weight. When the amount is less than the above range, the effect of improving the welding resistance in polishing is low. If the above range is exceeded, the melt spinning becomes unstable, causing troubles such as yarn breakage, and the strength of the monofilament tends to decrease, and the breaking durability tends to deteriorate, which is not preferable.
[0015]
Abrasive abrasive particles used in the present invention include alumina oxide, silicon carbide, artificial diamond, and the like. Their count is # 36 to # 3000 defined in JISR6001 (1973), particularly #. It is preferably in the range of 60 to # 1000.
[0016]
The compounding amount of the abrasive particles is preferably in the range of 5 to 40% by weight, particularly 10 to 30% by weight, based on the polyamide resin. If the amount of the abrasive abrasive particles is less than the above range, the polishing power is insufficient, and if it exceeds the above range, the strength of the melt-spun monofilament is reduced, and the break durability tends to deteriorate. Not preferred.
[0017]
The bristle material for a polishing brush of the present invention is prepared by mixing a required amount of a fluorine-based resin with the polyamide-based resin, further adding a required amount of abrasive particles, mixing and then subjecting the mixture to a melt spinning machine. It is obtained by cooling after being discharged and further stretching if necessary.
[0018]
The cross-sectional shape of the monofilament thus obtained can be elliptical, triangular, rectangular and other irregular shapes other than circular.
[0019]
The yarn diameter (average diameter) of the monofilament is preferably from 0.2 to 3.5 mm, particularly preferably from 0.4 to 3.0 mm. Here, if the diameter of the monofilament is less than the above range, the bristle is too weak and the polishing effect tends to be small, and if the diameter exceeds the above range, the bristle is too strong and hard to bend. This causes an unfavorable tendency that flocking to a board or the like becomes difficult.
[0020]
The bristle material for a polishing brush of the present invention thus formed has excellent polishing performance in dry polishing of a stainless steel sheet specified in JIS-G4305 (1984), and in particular, has much higher welding resistance than the conventional one. Demonstrates the desirable performance of being excellent.
Therefore, the bristle material for a polishing brush of the present invention cuts the monofilament to a predetermined length, and implants the hair in a cup brush, a tubular brush, a channel brush, a disc roll brush, and the like, and mainly serves as a rotary brush for dry polishing. In particular, it can be effectively used for polishing in which welding resistance is required.
[0021]
【Example】
Hereinafter, the configuration and effects of the present invention will be further described with reference to examples.
[0022]
In the following examples, the polishing amount and the resistance to welding were evaluated by the methods described below.
[Polishing amount]
A cup-shaped brush in which the above monofilament was implanted with an inner diameter of 45 mm, an outer diameter of 70 mm, and a bristle length of 30 mm was attached to a hand grinder. The work was performed, and the weight of the brass metal that had been removed was measured.
[Welding resistance]
The cup-shaped brush was attached to a hand grinder, and this was brought into contact with a stainless steel plate: SUS316 (thickness: 2 mm) specified by JIS-G4305 (1984) under its own weight, and the surface was polished while rotating at 12000 rpm. Was carried out, and the adhesion state (dirt) of the deposited material of the polishing brush bristle material to the surface of the stainless steel plate was visually observed, and evaluated and classified according to the following four criteria.
[0023]
◎: No adhesion of deposited material,
：: adhesion of the deposited material was slight, but almost inconspicuous;
Δ: slight adhesion of deposited material
×: Many deposits adhered.
[Example 1]
To a nylon 610 resin having a relative viscosity of 3.8 [solid-phase polymerized product of M2021 manufactured by Toray Industries, Inc .: M2041], a tetrafluoroethylene / ethylene copolymer resin [Aflon COP C-88AXP manufactured by Asahi Glass Co., Ltd.] was used. Silicon carbide abrasive particles having a particle size of # 80 obtained by coating the blended composition with 0.2% by weight of a silane coupling agent [SH6020 manufactured by Dow Corning Toray Silicone Co., Ltd.] (Showa The composition to which 30% by weight (manufactured by Denko Corporation) is added is supplied to a twin-screw extrusion spinning machine, melt-spun from a spinning nozzle having a pore diameter of 3.0 mm at 280 ° C, and then stretched 3.3 times at 190 ° C. Produced a monofilament having a diameter of 1.2 mm. Then, the obtained monofilament is heated at a temperature of 20 ° C. and a relative humidity of 65% RH for 2 days or more, then processed into the above-mentioned cup-shaped brush, and the abrasion and welding resistance of the brush are evaluated. Was. Table 1 shows the results.
[Example 2]
Monofilaments having a diameter of 1.2 mm were manufactured under the same conditions as in Example 1 except that a composition obtained by adding 20% by weight of the above tetrafluoroethylene / ethylene copolymer resin to the above nylon 610 resin and using a blended composition was used. Then, brushing was performed in the same manner as in Example 1, and the results of the evaluation of the polishing property and the welding resistance were also shown in Table 1.
[Example 3]
The same conditions as in Example 1 were used except that 5% by weight of the tetrafluoroethylene / ethylene copolymer resin was added to the nylon 610 resin and a blended composition was used. Monofilaments were manufactured, brushed in the same manner as in Example 1, and evaluated for abrasiveness and welding resistance. Table 1 also shows the results.
[Example 4]
Monofilaments having a diameter of 1.2 mm were produced under the same conditions as in Example 1 except that nylon 612 resin having a relative viscosity of 3.6 (manufactured by Degussa: D22) was used instead of nylon 610 resin. Table 1 also shows the results of brushing and evaluation of the polishing property and the welding resistance in the same manner as in Example 1.
[Comparative Example 1]
A monofilament having a diameter of 1.2 mm was obtained under the same conditions as in Example 1 except that 1.5% by weight of the above tetrafluoroethylene / ethylene copolymer resin was added to the above nylon 610 resin and a blended composition was used. Was manufactured and brushed in the same manner, and the results of the evaluation of the abrasiveness and the resistance to welding were also shown in Table 1.
[Comparative Example 2]
In Example 1, a monofilament having a diameter of 1.2 mm was manufactured under the same conditions except that the compounding of the tetrafluoroethylene / ethylene copolymer resin was omitted, and the same monofilament was brushed and polished as in Example 1. Table 1 also shows the results of the evaluation of the heat resistance and the welding resistance.
[Comparative Example 3]
In Example 4, a monofilament having a diameter of 1.2 mm was manufactured under the same conditions, except that the blending of the tetrafluoroethylene / ethylene copolymer resin was omitted, and brushing and polishing were performed in the same manner as in Example 1. Table 1 also shows the results of the evaluation of the heat resistance and the welding resistance.
[0024]
[Table 1]

[0025]
As is clear from the results in Table 1, the bristle material for the polishing brush of the present invention (Examples 1 to 4) is clearly superior in welding resistance to the bristle material for the conventional polishing brush (Comparative Examples 1 to 3). have.
[0026]
【The invention's effect】
As described above, the bristle material for a polishing brush of the present invention exhibits an unprecedented property of being excellent in abrasion and also excellent in welding resistance in dry polishing of special steel such as a stainless steel plate. It is.

Claims (4)

A bristle material for a polishing brush, comprising a monofilament obtained by melt-spinning a resin composition containing 5 to 40% by weight of abrasive particles and 3 to 25% by weight of a fluorine resin with respect to a polyamide resin. 2. The polishing brush according to claim 1, wherein the polyamide-based resin is selected from nylon 6, nylon 66, nylon 610, nylon 612, nylon 12, and nylon 6/66 copolymer. 3. Hair material. 3. The bristle material for a polishing brush according to claim 1, wherein the abrasive particles have a count of # 36 to # 3000. 4. The bristle material for a polishing brush according to any one of claims 1 to 3, wherein the monofilament has a yarn diameter of 0.2 to 3.5 mm.