JP2004025393A - Bristle material for polishing brush - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bristle material for a polishing brush having an excellent polishing property in dry polishing work of special steel such as stainless steel sheets and excellent in weld-bond resistance. <P>SOLUTION: This bristle material is formed of a monofilament made by melting and spinning a resin component containing 5-40 weight % of polishing abrasive grains against synthetic resin of polyester, polyamide, etc. and 3-30 weight % of silicone oil of polyalkylsiloxane, phenylsiloxane and their organic denatured material, etc. <P>COPYRIGHT: (C)2004,JPO

Description

【００４４】
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１〜５）は、従来品（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。
【００４５】
【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 improvement of 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 the special steel such as the stainless steel plate. In addition, the present invention also relates to a bristle material for a polishing brush which is excellent in a property that a deposited material of the bristle material for the 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, one made of a synthetic resin monofilament containing polishing abrasive particles is known. BACKGROUND ART Surface polishing of a metal to be treated is performed by pressing a roll brush, a cup brush, a tubular brush, or the like on the surface of the metal to be treated and applying rotation thereto.
[0003]
Therefore, a bristle material for a polishing brush made of a monofilament containing abrasive particles is required to have an excellent polishing force. In order to satisfy such required performance, nylon 6, nylon 66, nylon 66 6/66 copolymer, nylon 610, nylon 612, nylon 12 and other polyamide resins and polyester resins such as polybutylene terephthalate and the like. As abrasive particles, select the most suitable material from alumina-based abrasive particles such as coke powder, bauxite, and alumina oxide, silicon carbide-based abrasive particles such as white silica stone and abrasive powder, and artificial diamond abrasive particles. Various attempts have been conventionally made (JP-A-4-300166).
[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, and cooling. 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]
For this reason, in the polishing of special steel such as stainless steel plates, polishing brushes made of metal wires such as piano wires have been mainly used.However, polishing brushes made of metal wires are scattered due to breakage during polishing. In addition to the danger to the human body, there is a problem that the obtained polished surface lacks uniformity.
[0006]
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).
[0007]
[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 as a problem.
[0008]
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.
[0009]
[Means for Solving the Problems]
The present inventors have conducted intensive studies to achieve the above object, and as a result, when incorporating abrasive abrasive particles into synthetic resin typified by polyester resin and polyamide resin, silicone oil was added together with abrasive abrasive particles. The present inventors have found that a monofilament obtained by melt-spinning a composition containing a specific amount is effective in achieving both abrasion resistance and welding resistance in dry polishing of a stainless steel plate, and arrived at the present invention.
[0010]
That is, the bristle material for a polishing brush of the present invention is characterized by comprising a monofilament obtained by melt-spinning a resin composition containing 5 to 40% by weight of abrasive particles and 3 to 30% by weight of silicone oil based on a synthetic resin. And
[0011]
In the bristle material for the polishing brush of the present invention,
The silicone oil is at least one selected from polyalkylsiloxanes, phenylsiloxanes, and organically modified products thereof;
The synthetic resin is a polyester resin and / or a polyamide resin,
The polyester resin is at least one selected from polybutylene terephthalate, polyethylene terephthalate and a composition containing a polyester elastomer therein; and the polyamide resin is nylon 6, nylon 66, nylon 610, nylon 612, Being at least one selected from nylon 12 and nylon 6/66 copolymer;
Preferably, the count of the abrasive particles is in the range of # 36 to # 3000, and the monofilament yarn diameter is in the range of 0.2 to 3.5 mm. These conditions are all preferable conditions. By applying, more excellent effects can be obtained.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the bristle material for a polishing brush of the present invention will be described in detail.
[0013]
The synthetic resin used in the present invention is not particularly limited as long as it is a thermoplastic resin that can be melt-spun, and among them, a polyester resin and / or a polyamide resin is preferably used.
[0014]
As the polyester-based resin, polybutylene terephthalate and polyethylene terephthalate are preferably used.By mixing and using an appropriate amount of a polyester-based elastomer with these polyester-based resins, the toughness of the abrasive-particle-containing monofilament is improved, and polishing is performed. A favorable effect of suppressing sagging and breakage in processing and improving polishing durability can be obtained.
[0015]
The polyester resin used in the present invention has an intrinsic viscosity of 0.6 or more when a solution obtained by dissolving 2 g of a polymer in 25 ml of 98.5% orthochlorophenol is measured at 25 ° C. using an Ostwald viscometer. When the intrinsic viscosity is less than 0.6, the melt spinnability becomes unstable, which may have an adverse effect of causing a decrease in breakage durability due to bending fatigue.
[0016]
As the polyamide resin, at least one selected from the group consisting of nylon 6, nylon 66, nylon 610, nylon 612, nylon 12, and nylon 6/66 copolymer can be used. It is preferable because a monofilament containing abrasive particles can be obtained.
[0017]
The polyamide resin used in the present invention preferably has a relative viscosity of at least 3.0 measured at 25 ° C. using a solution obtained by dissolving 0.25 g of a polymer in 25 ml of 98% sulfuric acid using an Ostwald viscometer, If the relative viscosity is less than 3.0, the melt spinnability becomes unstable, which may have an adverse effect of causing a decrease in breakage durability due to bending fatigue.
[0018]
Examples of the abrasive particles used in the present invention include alumina oxide, silicon carbide, artificial diamond, and the like, and their count is # 36 to # 3000 specified in JISR6001 (1973), particularly #. It is preferably in the range of 60 to # 1000.
[0019]
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 synthetic resin. When the amount of the abrasive abrasive particles is less than the above range, the polishing power becomes insufficient, and when the amount exceeds the above range, the strength of the melt-spun abrasive abrasive particle-containing monofilament decreases, and the direction in which the fracture durability decreases. Is not preferred.
[0020]
The silicone oil used in the present invention is preferably at least one selected from polyalkylsiloxanes, phenylsiloxanes, and organically modified products thereof. Specific examples include dimethyl silicone oil, methylphenyl silicone oil, and dimethyl silicone oil. Examples include amino-modified silicone oil into which an amino group has been introduced, and epoxy-modified silicone oil into which an epoxy group has been introduced. The viscosity of the silicone oil is not particularly limited, but is preferably in the range of 1,000 to 1,000,000 centistokes in order to uniformly disperse it in the synthetic resin.
[0021]
These silicone oils can be added as they are in the spinning step when the mixture of the synthetic resin and the abrasive particles is melt-spun. However, the silicone oil is added to the synthetic resin melt, cooled once, and pelletized. Mixing with a synthetic resin / abrasive abrasive particle mixture or abrasive abrasive particles in the form of silicone oil-containing synthetic resin pellets is a preferable means for improving the stability of melt spinning.
[0022]
Commercially available silicone oil-containing synthetic resin pellets can be used as they are. Specific examples of these commercially available products include BY27-009 (polybutylene terephthalate) manufactured by Dow Corning Toray Silicone Co., Ltd. As a base resin and containing silicone oil at 50% by weight), BY27-112 (polyethylene terephthalate resin as a base resin containing 50% silicone oil), BY27-011 (nylon) No. 6 as a base resin containing 50% by weight of silicone oil) and BY27-005 (Nylon 66 as a base resin containing 50% by weight of silicone oil).
[0023]
The compounding amount of the silicone oil is preferably in the range of 3 to 30% by weight, particularly 8 to 20% by weight, based on the synthetic resin, and when it is less than 3% by weight, the effect of improving the welding resistance in polishing can be sufficiently obtained. If the content exceeds 30% by weight, melt spinning becomes unstable, causing not only troubles such as thread breakage, but also a tendency that the strength and break durability of the obtained abrasive abrasive particle-containing monofilaments decrease. Not preferred.
[0024]
The bristle material for a polishing brush of the present invention is obtained by mixing the above-mentioned synthetic resin with silicone oil and / or pellets containing a necessary amount of silicone oil in the synthetic resin, and adding and mixing a necessary amount of abrasive abrasive particles. Thereafter, the mixture can be obtained by subjecting the mixture to a melt spinning machine, melt-spinning, cooling, and, if necessary, stretching.
[0025]
The cross-sectional shape of the abrasive filament-containing monofilament thus obtained can be elliptical, triangular, rectangular and other irregular shapes other than circular.
[0026]
The average diameter of the abrasive-particle-containing monofilament is preferably in the range of 0.2 to 3.5 mm, particularly 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 is small, and if it exceeds the above range, the bristle is too strong and hard to bend, for example, for a disk plate or the like. Even if it is bent, it is not preferable because flocking becomes difficult.
[0027]
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.
[0028]
Accordingly, the bristle material for a polishing brush of the present invention is obtained by cutting the above-mentioned abrasive filament-containing monofilament into a predetermined length, implanting it into a cup brush, a tubular brush, a channel brush, a disc roll brush, and the like. In addition, by using a rotating brush in a dry polishing method, it can be effectively used particularly for a polishing process requiring welding resistance.
[0029]
【Example】
Hereinafter, the configuration and effects of the present invention will be further described with reference to examples.
[0030]
In the following examples, the polishing amount and the adhesion resistance were evaluated by the methods described below.
[0031]
[Polishing amount]
Abrasive abrasive particle-containing monofilament is attached to a hand grinder with a cup-shaped brush planted with an inner diameter of 45 mm, an outer diameter of 70 mm, and a hair length of 30 mm, and is brought into contact with a brass metal plate while rotating at 12,000 rpm with its own weight, The weight of the brass metal scraped off when the polishing operation was performed for 30 minutes was measured.
[0032]
[Welding resistance]
The cup-shaped brush was attached to a hand grinder, and this was brought into contact with a stainless steel plate (SUS316 steel plate having a thickness of 2 mm) specified by JIS-G4305 (1984) under the pressure of its own weight, and the surface was polished while rotating at 12000 rpm. The state of adhesion (dirt) of the adhered material of the polishing brush bristle material to the surface of the steel plate when the processing was performed was visually observed, and evaluated and classified according to the following four criteria.
[0033]
◎: no adhesion of weld deposit
：: adhesion of the deposited material was slight but hardly noticeable,
Δ: slight adhesion of deposited material
×: Many deposits adhered.
[0034]
[Example 1]
Polybutylene terephthalate resin pellets containing 50% by weight of silicone oil in 100 parts by weight of a polybutylene terephthalate resin having an intrinsic viscosity of 1.5 [manufactured by Toray Industries, Inc .: 1500S] [manufactured by Dow Corning Toray Silicone Co., Ltd .: [Product name BY27-009] 25 parts by weight (equivalent to 10% by weight of silicone oil) and 100 parts by weight of a blended composition, 0.2 parts by weight of a silane coupling agent [SH6020 manufactured by Dow Corning Toray Silicone Co., Ltd.] % Of silicon carbide abrasive particles having a particle size of # 80 (manufactured by Showa Denko KK) and a composition of 45% by weight were supplied to a twin-screw extrusion spinning machine, and the composition was subjected to 260 ° C. through a spinning nozzle having a pore diameter of 3.0 mm. After melt-spinning, a monofilament containing polishing abrasive particles having a diameter of 1.2 mm is drawn 3.4 times at 190 ° C. It was produced cement.
[0035]
After controlling the temperature and humidity of the monofilament containing abrasive particles obtained above at a temperature of 20 ° C. and a relative humidity of 65% RH for at least two days, the monofilament is processed into the cup-shaped brush, and the polishing and welding resistance are obtained. Was evaluated. The results are shown in Table 1.
[0036]
[Example 2]
Silicone oil was added to 100 parts by weight of a composition obtained by mixing the polybutylene terephthalate resin having an intrinsic viscosity of 1.5 and a polyester elastomer resin [manufactured by Du Pont-Toray Co., Ltd .: Hytrel 7247] at a ratio of 8: 2. A polybutylene terephthalate resin pellet containing 50% by weight (manufactured by Dow Corning Toray Silicone Co., Ltd., product name: BY27-009) was added in an amount of 80 parts by weight (equivalent to 22% by weight of silicone oil), and a blended composition was used. A monofilament having a diameter of 1.2 mm was manufactured under the same conditions as in Example 1, brushed in the same manner, and the polishing and welding resistance were evaluated. The results are also shown in Table 1.
[0037]
[Example 3]
11 parts by weight of a polybutylene terephthalate resin pellet [manufactured by Dow Corning Toray Silicone Co., Ltd .: trade name BY27-009] containing 100% by weight of the above-mentioned polybutylene terephthalate resin having an intrinsic viscosity of 50% by weight of silicone oil. (Equivalent to 5% by weight of silicone oil) was added, and a monofilament having a diameter of 1.2 mm was manufactured under the same conditions as in Example 1 except that a blended composition was used. Table 1 also shows the results of the evaluation of the weldability.
[0038]
[Example 4]
Polyethylene terephthalate resin pellets having an intrinsic viscosity of 1.2 [100% by weight of Toray Industries, Inc., product name: T701T] and containing 50% by weight of silicone oil [Toray Dow Corning Silicone Co., Ltd.] : Product name BY27-112] A monofilament having a diameter of 1.2 mm was produced under the same conditions as in Example 1 except that 25 parts by weight (equivalent to 10% by weight of silicone oil) was added and a blended composition was used. The results of the brushing and the evaluation of the abrasion resistance and the welding resistance as in the examples are also shown in Table 1.
[0039]
[Example 5]
Nylon 6 resin pellets containing 50% by weight of silicone oil in 100 parts by weight of nylon 6 resin having a relative viscosity of 4.1 [manufactured by Toray Industries, Inc., product name: M1041] [manufactured by Toray Dow Corning Silicone Co., Ltd.] [Product name: BY27-011] 25 parts by weight (equivalent to 10% by weight of silicone oil) were added, and a blended composition was used. A monofilament having a thickness of 0.2 mm was manufactured, brushed in the same manner as in Example 1, and the results of evaluation of the polishing property and the welding resistance are also shown in Table 1.
[0040]
[Comparative Example 1]
3 parts by weight of polybutylene terephthalate resin pellets (manufactured by Toray Dow Corning Silicone Co., Ltd., product name: BY27-009) in which 100 parts by weight of a polybutylene terephthalate resin having an intrinsic viscosity of 1.5 are mixed with 50 wt. (Equivalent to 1.5% by weight of silicone oil) and a blended composition was used, except that a monofilament having a diameter of 1.2 mm was manufactured under the same conditions as in Example 1 and brushed as in Example 1. Table 1 also shows the results of the evaluation of the polishing properties and the welding resistance.
[0041]
[Comparative Example 2]
In Example 1, a monofilament having a diameter of 1.2 mm was manufactured under the same conditions, except that the blending of the resin pellets (product name BY27-009) was omitted, and brushing was performed in the same manner. Table 1 also shows the results of the evaluation.
[0042]
[Comparative Example 3]
In Example 5, a monofilament having a diameter of 1.2 mm was manufactured under the same conditions, except that the compounding of the resin pellet [BY27-011] was omitted, and the same process was performed for brushing to evaluate the abrasiveness and welding resistance. Table 1 also shows the results of the above.
[0043]
[Table 1]

[0044]
As is clear from the results in Table 1, the bristle material for a polishing brush of the present invention (Examples 1 to 5) has a significantly better welding resistance than the conventional products (Comparative Examples 1 to 3). .
[0045]
【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 (7)

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 30% by weight of silicone oil based on a synthetic resin. The bristle material for a polishing brush according to claim 1, wherein the silicone oil is at least one selected from polyalkylsiloxanes, phenylsiloxanes, and organically modified products thereof. 3. The bristle material for a polishing brush according to claim 1, wherein the synthetic resin is a polyester-based resin and / or a polyamide-based resin. 4. The bristle material for a polishing brush according to claim 3, wherein the polyester-based resin is at least one selected from polybutylene terephthalate, polyethylene terephthalate, and a composition containing a polyester-based elastomer in these. The polishing brush according to claim 3, wherein the polyamide resin is at least one selected from the group consisting of nylon 6, nylon 66, nylon 610, nylon 612, nylon 12, and nylon 6/66 copolymer. Hair material. The bristle material for a polishing brush according to any one of claims 1 to 5, wherein the count of the polishing abrasive particles is in the range of # 36 to # 3000. The bristle material for a polishing brush according to any one of claims 1 to 6, wherein a yarn diameter of the monofilament is in a range of 0.2 to 3.5 mm.