JP2005262366A - Bristle material for polishing brush - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bristle material for a polishing brush, which has suitable polishing performance, has excellent surface finishing properties, and forms a uniform polished surface. <P>SOLUTION: The bristle material for the polishing brush is formed of a monofilament which is produced by fusing and fiber-spinning a composition containing a thermoplastic resin and bran-phenol resin containing carbide particles added to the thermoplastic resin. Preferably the content of the bran-phenol resin containing carbide particles is limited to the range of 1 to 10 wt.%, the thermoplastic resin is selected from polyester or polyamide, and the yarn count of the bran-phenol resin containing carbide particles is selected from #36 to #3,000. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a bristle material for a polishing brush mainly used for finishing and polishing the surface of special steel such as a stainless steel plate.

  Conventionally, as a bristle material for a polishing brush used in surface polishing processing of a metal steel plate, one made of a synthetic resin monofilament containing various abrasive particles is known. For example, this abrasive particle containing monofilament is used as a bristle material. The surface of the metal to be processed is polished by pressing a roll brush, a cup brush, a cylindrical brush, or the like that has been planted on the surface of the metal to be processed and imparting rotation.

  Accordingly, an abrasive brush bristle material comprising abrasive abrasive particle-containing monofilaments is required to have an excellent polishing power. In order to satisfy the required performance, nylon 6, nylon 66, and the like are used as the material for the abrasive brush bristle material. , Nylon 6/66 copolymer, Nylon 610, Nylon 612, Nylon 12 and other polyamide resins and Polybutylene terephthalate, etc. The most suitable abrasive abrasive particles to be added to alumina abrasive particles such as coke powder, bauxite, and alumina oxide, silicon carbide abrasive particles such as white silica and abrasive powder, and artificial diamond abrasive particles Various attempts to select a material (for example, see Patent Document 1) have been studied in the past. Came.

However, these conventional bristle materials for abrasive brushes have a problem that they are unsuitable for uniform surface finishing because their polishing power is extremely good.
JP-A-7-109620 (pages 1 to 5)

  The present invention has been made as a result of studies to solve the above-described problems in the prior art, and an object thereof is to provide a bristle material for an abrasive brush that is superior in surface finish to the conventional one.

  In order to achieve the above object, according to the present invention, an abrasive brush comprising a monofilament obtained by melt spinning a composition containing moss / phenol resin mixed carbide particles to a thermoplastic resin. A bristle material is provided.

In the hair material for polishing brush of the present invention,
The mosquito / phenol resin mixed carbide particle content is 1 to 10% by weight,
The thermoplastic resin is at least one selected from polyester, particularly polybutylene terephthalate, polyethylene terephthalate, and a composition containing a polyester-based elastomer therein;
The thermoplastic resin is at least one selected from polyamide, in particular nylon 6, nylon 66, nylon 610, nylon 612, nylon 12 and nylon 6/66 copolymer, and the moss / phenol resin mixed carbide It is preferable that the particle count is # 36 to # 3000, and satisfying at least one of these conditions can be expected to obtain a more excellent effect.

  As described below, the thermoplastic resin bristle material for polishing brushes of the present invention has an appropriate polishing force and is excellent in surface finish and can provide a uniform polished surface. It is suitable for steel finishing and has high utility value in metal related industries.

  Hereinafter, the present invention will be specifically described.

  The thermoplastic resin constituting the bristle material for the polishing brush of the present invention may be any fiber-forming polymer having thermoplasticity such as polyester, polyamide, and polyolefin, but polyester or polyamide is particularly preferable.

  Among the polyesters, polybutylene terephthalate and polyethylene terephthalate are preferably used. By using an appropriate amount of a polyester elastomer mixed with these polyester resins, the toughness of the hair material for the polishing brush is improved, and in the polishing process. It is possible to obtain a preferable effect of suppressing sag and breakage and improving polishing durability.

  The polyester resin used in the present invention has an intrinsic viscosity of 0.6 or more measured at 25 ° C. using an Ostwald viscosity tube in a solution of 2 g of polymer in 25 ml of 98.5% orthochlorophenol. Preferably, when the intrinsic viscosity is less than 0.6, the melt spinnability becomes unstable, and there is a possibility that an adverse effect that the breakage durability is lowered due to bending fatigue may be caused.

  As the polyamide, at least one selected from nylon 6, nylon 66, nylon 610, nylon 612, nylon 12 and nylon 6/66 copolymer is used for polishing brushes having both toughness and polishing durability. It is preferable because a hair material is obtained.

  The polyamide used in the present invention preferably has a relative viscosity of 3.0 or more measured at 25 ° C. using an Ostwald viscosity tube in a solution in which 0.25 g of polymer is dissolved in 25 ml of 98% sulfuric acid. If it is less than 3.0, melt spinnability becomes unstable, and there is a possibility that an adverse effect is caused that the breakage durability is lowered due to bending fatigue.

  The moss / phenolic resin mixed carbide particles contained in the bristle material for polishing brush of the present invention are hard porous carbon particles. For example, a mixture of defatted rice bran and phenolic resin in a vacuum or an inert gas. It can be manufactured by firing and carbonization, followed by cooling and pulverization classification. For example, “RB ceramics” powder (product of Sanwa Yushi Co., Ltd.) (hereinafter abbreviated as RBC powder) is commercially available. Can be obtained and used.

  The size of the moss / phenol resin mixed carbide particles is preferably in the range of # 36 to # 3000, particularly # 60 to # 1000 defined in the abrasive particle size JIS R6001 (1973).

  The blending amount of the moss / phenol resin mixed carbide particles is preferably in the range of 1 to 10% by weight, particularly 2 to 8% by weight, based on the thermoplastic resin. If the addition amount of moss / phenolic resin mixed carbide particles is less than the above range, the polishing power will be insufficient, and if it exceeds the above range, the strength of the melt-spun monofilament will decrease, and the bristle durability of the abrasive material for abrasive brushes Unfavorable tendency to decrease.

  Further, the bristle material for polishing brush of the present invention is composed of alumina carbide particles represented by coke powder, bauxite, alumina oxide, etc. other than moss / phenol resin mixed carbide particles, silicon carbide such as white silica stone, abrasive powder, etc. System abrasive particles, artificial diamond abrasive particles, and the like can be appropriately contained. Moreover, silicone oils, various fluororesins, azine pigments, and the like can be contained.

  The monofilament constituting the bristle material for an abrasive brush of the present invention is prepared by mixing the thermoplastic resin and the moss / phenol resin mixed carbide particles, then subjecting the mixture to a melt spinning machine, cooling after melt spinning, Furthermore, it can obtain by extending | stretching as needed.

  The cross-sectional shape of the monofilament thus obtained can be an ellipse, a triangle, a rectangle and other irregular shapes in addition to a circle.

  Moreover, the average diameter of the monofilament which comprises the bristle material for polishing brushes of this invention has the suitable range of 0.1-3.5 mm, especially 0.4-3.0 mm. Here, if the diameter of the bristle material for the polishing brush is less than the above range, the bristle will be too weak and the polishing effect will be small, and if it exceeds the above range, the bristle will be too strong and hard and difficult to bend, for example Even if it is bent with respect to a disk plate or the like, an undesired tendency that it becomes difficult to plant the hair may be caused.

  Thus, the bristle material for polishing brushes of the present invention has an appropriate polishing performance and can provide a uniform polished surface with excellent surface finish in dry / wet polishing.

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

  In the following examples, the evaluation of the polishing amount and the evaluation of the polishing state were performed by the methods described below.

[Evaluation of polishing amount]
A cup-shaped brush with a hair material of 45 mm inner diameter, outer diameter 70 mm, and hair length 30 mm is attached to the hand grinder, and it is brought into contact with a brass metal plate for 30 minutes while rotating at 12000 rpm under its own pressure. The weight of the brass metal scraped off when the polishing operation was performed was measured.

[Evaluation of polishing state]
The surface state of the brass metal after the evaluation of the polishing amount was visually observed and evaluated as follows.
○: Almost no polishing marks are observed.
X: Polishing marks are conspicuous.

[Example 1]
A composition obtained by adding 5 parts by weight of RBC powder having a particle size of # 140 to 100 parts by weight of a polybutylene terephthalate resin having an intrinsic viscosity of 1.5 (Toray Industries, Inc .: 1500S) (hereinafter abbreviated as PBT). It was subjected to a twin-screw kneading extrusion spinning machine, melt-spun at 260 ° C. from a spinning nozzle with a hole diameter of 3.0 mm, and then stretched 3.4 times at 190 ° C., whereby a bristle material for a polishing brush having a diameter of 1.2 mm ( Monofilament) was produced.

  The hair material for polishing brush obtained above was temperature-controlled and humidity-controlled for 2 days or more at a temperature of 20 ° C. and a relative humidity of 65% RH, then processed into the cup-shaped brush described above, and evaluation of polishing properties and polishing conditions. Went. The results are shown in Table 1.

[Example 2]
Except for changing 100 parts by weight of PBT in Example 1 to 100 parts by weight of a composition in which the PBT and the polyester elastomer resin [manufactured by Toray DuPont Co., Ltd .: Product name Hytrel 7247] were mixed at a ratio of 8: 2. Table 1 also shows the evaluation results of the polishing properties and the polishing state of the bristle material for polishing brushes obtained in the same manner as in Example 1.

[Example 3]
Except that the PBT in Example 1 was changed to 100 parts by weight of a polyethylene terephthalate resin having an intrinsic viscosity of 1.2 (product name: T701T manufactured by Toray Industries, Inc.) (hereinafter referred to as PET), the same procedure as in Example 1 Table 1 also shows the evaluation results of the polishing properties and the polishing state of the bristle material for polishing brush obtained in this way.

[Examples 4 to 9]
100 parts by weight of nylon 6 (product name: CM1041) manufactured by Toray Industries, Inc., which has a relative viscosity of 4.1, is 100 parts by weight (Example 4), nylon 66 [product name: CM3001] manufactured by Toray Industries, Inc. Parts by weight (Example 5), nylon 610 [manufactured by Toray Industries, Inc., product name: CM2001] 100 parts by weight (Example 6), nylon 612 [manufactured by DuPont] 100 parts by weight (Example 7), nylon 12 [Atofina Company] 100 parts by weight (Example 8) and nylon 6/66 [manufactured by Toray Industries, Inc., product name: CM6021] 100 parts by weight (Example 9), except that they were changed to the same as Example 1 Table 1 also shows the evaluation results of the polishing properties and the polishing state of the bristle material for polishing brush obtained.

[Comparative Examples 1-4]
Silicon carbide abrasive particles having a particle size of # 140, in which 5 parts by weight of RBC powders in Examples 1 to 4 were coated with 0.2% by weight of a silane coupling agent [SH6020 manufactured by Toray Dow Corning Silicone Co., Ltd.] Table 1 also shows the evaluation results of the polishing properties and the polishing state of the polishing brush hair materials obtained in the same manner as in Examples 1 to 4 except that the amount was changed to 40 parts by weight (manufactured by Showa Denko).

  The bristle material for an abrasive brush of the present invention has an appropriate polishing performance, has an excellent surface finish and can provide a uniform polished surface, and is suitable for metal finishing. High value.

Claims (7)

A bristle material for an abrasive brush, comprising a monofilament obtained by melt spinning a composition containing moss / phenol resin mixed carbide particles with a thermoplastic resin. The bristle material for an abrasive brush according to claim 1, wherein the content of the moss / phenol resin mixed carbide particles is 1 to 10% by weight. The bristle material for an abrasive brush according to claim 1 or 2, wherein the thermoplastic resin is polyester. 4. The abrasive material for an abrasive brush according to claim 3, wherein the polyester is at least one selected from polybutylene terephthalate, polyethylene terephthalate, and a composition containing a polyester elastomer. The bristle material for an abrasive brush according to claim 1 or 2, wherein the thermoplastic resin is polyamide. 6. The abrasive brush bristles according to claim 5, wherein the polyamide is at least one selected from nylon 6, nylon 66, nylon 610, nylon 612, nylon 12 and nylon 6/66 copolymer. Wood. The bristle material for an abrasive brush according to any one of claims 1 to 6, wherein the moss / phenol resin mixed carbide particles have a count of # 36 to # 3000.