JP2009269118A - Bristle material for polishing brush and polishing brush using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bristle material for a polishing brush having higher elasticity of a brush body than that of a conventional bristle material for the polishing brush, efficiently carrying out polishing up to edges and corners of a complicated uneven part existing at a surface of a material to be polished, suppressing falling of abrasive particles as much as possible, preventing a surface to be polished from being stained, being excellent in breaking durability, and exhibiting lasting polishing performance, and also to provide a polishing brush using the same. <P>SOLUTION: The bristle material for the polishing brush is configured of a monofilament having a plurality of ridge parts 3 which are continuously protruded in parallel with a fiber axis at an outer circumference in a fiber axial direction of a monofilament body 2 made of a thermoplastic resin. The ridge part is composed of a mixture of a thermoplastic resin having higher hardness than that of the thermoplastic resin forming the monofilament body and the abrasive particles. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an improvement in a polishing brush bristle material and a polishing brush used for polishing a metal surface, precision equipment, and the like in a polishing process of a metal member such as a steel plate and an object to be polished such as a machine part. Because it has high bristles, a small drop rate of abrasive particles, and can be polished without contaminating the surface to be polished, it has excellent polishing performance and efficiently polishes every corner of the complex uneven part on the surface of the object to be polished In addition, the present invention relates to a bristle material for an abrasive brush and an abrasive brush that are excellent in sustainability of this excellent abrasive performance.

  Conventionally, in surface polishing processing of an object to be polished such as a metal member such as a steel plate and a machine part, a roll brush, a cup brush, a cylindrical brush, a foil brush, etc., in which a synthetic resin monofilament containing abrasive particles is used as a hair material A polishing operation such as surface polishing and deburring polishing of the end surface is performed by pressing the surface of the object to be polished and applying rotation.

  However, since the surface to be polished of these objects to be polished has become complicated due to the presence of not only a flat surface but also an uneven surface, polishing deburring has become increasingly difficult in recent years. In addition, since abrasive particles fall off from the polishing brush during polishing and deburring and remain on the polishing surface, leading to defects in the final product, the handling of the polishing brush has become particularly severe.

  As a means for solving such problems, it has been studied to use a hair material for a polishing brush having a smaller diameter for polishing a complicated uneven surface. In this case, abrasive particles and a synthetic resin are further used. In order to improve the adhesive force between the abrasive particles and prevent the abrasive particles from falling off, a polishing brush bristle material (for example, see Patent Document 1), a synthetic resin and an abrasive that have been subjected to silane coupling treatment on the abrasive particle surfaces. A bristle material for an abrasive brush in which multi-fibers are covered with fibers made of material particles (see, for example, Patent Document 2) has already been proposed.

  However, although the bristle material for abrasive brushes subjected to the silane coupling treatment is improved to some extent in the adhesive force between the abrasive particles and the synthetic resin compared to the bristle material for abrasive brushes not subjected to the silane coupling treatment, Since the bristle materials rub against each other strongly during polishing, it is still not effective enough to prevent the abrasive particles from falling off, and the bristle bristle material has low bending fatigue, which causes breakage of the bristle material. There was a problem that it was easy to do.

  In addition, in the hair material for abrasive brushes covered with multi-fibers, the hair materials also rub against each other strongly, so that the multi-fibers are unraveled, and the multi-fibers break and adhere to the object to be polished. Since the problem that the abrasive particles fall off and adhere to the surface of the object to be polished has been left, further improvement has been strongly demanded for the polishing brush hair material.

Furthermore, with a conventional polishing brush using a polishing brush bristle material, there is a limit to reducing the diameter of the polishing brush bristle material. Since there is a tendency that the removal and the polishing process are not performed completely, it has been demanded to realize a bristle material for an abrasive brush that has an even better polishing performance than the conventional one and that continuously exhibits it.
JP 55-51813 A JP 2001-32756 A

  The object of the present invention is to provide extremely excellent polishing performance in the deburring and polishing processing of complicated uneven portions of a polished surface of a metal member such as a steel plate, a machine part and a precision instrument, and a complex existing on the surface of the object to be polished. An object of the present invention is to provide a bristle material and a polishing brush for polishing brushes that can efficiently polish to every corner of such uneven portions and have excellent durability of the polishing performance.

  In order to achieve the above object, according to the present invention, the thermoplastic resin monofilament body is composed of a multi-leaf cross-sectional monofilament having a plurality of ridges continuously protruding in parallel to the fiber axis on the outer periphery in the fiber axis direction. Polishing characterized in that the ridges are made of a resin composition of a thermoplastic resin (B) and abrasive particles different from the thermoplastic resin (A) forming the monofilament body. A brush bristle material is provided.

In the hair material for polishing brush of the present invention,
The number of ridges present on the outer periphery of the cross-section of the multileaf monofilament is in the range of 2 to 6,
The thermoplastic resin (A) is nylon 6/610 copolymer and / or nylon 6/612 copolymer, and the thermoplastic resin (B) is polyethylene naphthalate,
The resin composition constituting the ridge is composed of 80 to 95% by weight of thermoplastic resin (B) and 20 to 5% by weight of abrasive particles, and the particle size of the abrasive particles is # 800 to 2000. Is mentioned as a more preferable condition, and by satisfying these conditions, a more excellent effect can be obtained.

  Further, the polishing brush of the present invention is characterized in that the above-mentioned abrasive material for a brush is used as at least a part of the hair material, and has a higher bristles than a conventional abrasive material for an abrasive brush, and is abrasive from the hair material. The material particles do not fall off very much, the polishing performance is good, and the superior effects that are not found in conventional bristle materials for polishing brushes, such as the excellent polishing performance, are exhibited.

  According to the present invention, the fluff is high, the falling rate of abrasive particles is small, and the surface to be polished can be polished without fouling. Therefore, the polishing performance is extremely excellent, and the corners of complex uneven portions present on the surface of the object to be polished are It is possible to obtain a polishing brush bristle material and a polishing brush that can be efficiently polished to various extents and that have excellent durability of the polishing performance.

  Hereinafter, the bristle material for polishing brush and the polishing brush of the present invention will be specifically described with reference to the drawings.

  Fig.1 (a) is a side view which shows an example of the bristle material for polishing brushes of this invention, (b) is the sectional view on the AA line of (a).

  As shown in FIG. 1, the bristle material for polishing brushes of the present invention has a plurality of ridges 3 that continuously protrude in parallel to the fiber axis on the outer periphery in the fiber axis direction of the thermoplastic resin monofilament body 2. It is composed of a bristle 1 of a multifilamentary monofilament.

  The monofilament body 2 of the multifilamentary monofilament is composed only of the thermoplastic resin (A) and does not contain abrasive particles, so that high fur is maintained and the entire abrasive particles in the monofilament Since the amount is lower than the conventional amount, the drop of the abrasive particles from the hair material is relatively reduced, and extremely excellent polishing performance can be ensured.

  Further, the ridge portion 3 is composed of a resin composition of a thermoplastic resin (B) and abrasive particles different from the thermoplastic resin (A), and the thermoplastic resin (B) is a thermoplastic resin. Unlike (A), the use of a high-hardness or high-viscosity thermoplastic resin (B) preferably not only enables the realization of excellent polishing performance, but also the abrasive particles only on the ridges 3. As a result, the total amount of abrasive particles can be reduced, and the overall amount of abrasive particles falling from the hair can be reduced.

  That is, when the monofilament body 2 and the ridges 3 are made of the same thermoplastic resin, it is not preferable because excellent polishing performance cannot be expected.

  In addition, it is preferable that the number of the protruding strips 3 existing on the outer periphery of the cross section of the multifilamentary monofilament is in the range of 2 to 6, particularly in the range of 3 to 5, and if less than 2, the polishing performance is reduced. The amount of abrasive particles falling off tends to increase.

  By adopting such a configuration, not only can the ridges 3 enter every corner of the complex irregularities present on the surface of the object to be polished, but they can be polished efficiently, and the fur of the entire hair material can be polished. Since the removal rate of abrasive particles is small and the surface to be polished can be polished without fouling, the durability of the excellent polishing performance is also good.

  Moreover, the compounding ratio of the thermoplastic resin (B) and the abrasive particles in the ridges 3 is 80 to 95% by weight / 20 to 5% by weight, particularly 85 to 95% by weight / 15 to 5% by weight. In the case where the ratio of the abrasive particles is less than the above range, excellent polishing performance is not exhibited. On the other hand, if the ratio exceeds the above range, an undesired tendency that the amount of dropping from the hair material becomes large is caused.

  Here, as specific examples of the thermoplastic resins (A) and (B) constituting the multileaf monofilament, nylon 6, nylon 66, nylon 610 (hereinafter referred to as N610), nylon 612 (hereinafter referred to as N612). , Polyamide resins such as nylon 6/66 copolymer and nylon 6/12 copolymer, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate (hereinafter referred to as PEN), polypropylene terephthalate, polymethylene naphthalate, polybutylene Polyester resins such as phthalates, Polyolefin resins such as polypropylene, low density and high density polyethylene, syndiotactic or atactic or isotactic polystyrene, polyphenylene sulfide, polystyrene・ Polybutadiene / polystyrene block copolymer, styrene elastomer such as polystyrene / polyisoprene / polystyrene block copolymer, polyolefin elastomer such as blend of olefin rubber such as ethylene / propylene / diethylene copolymer and polyolefin such as polypropylene or ethylene, polyurethane Examples include elastomers, polyester elastomers, fluororubber elastomers, polyether esters, polyurethanes, polycarbonates, polyarylates, ethylene tetrafluoroethylenes, polyvinylidene fluorides, and the like. Of these, polyamides and polyesters are preferably used. .

  The combination of the thermoplastic resins (A) and (B) can be appropriately selected from the above thermoplastic resins so that the latter has a high hardness or a high viscosity, but the thermoplastic resin ( PEN is most preferably used as B).

  And as a preferable combination of the thermoplastic resin (A) / (B) in the present invention, N610 / PEN, N612 / PEN and the like can be mentioned.

  In addition, the hardness of the thermoplastic resin as used in the field of this invention means the Rockwell hardness measured according to the prescription | regulation of JISK7202-2.

  Moreover, since the polyamide resin used in the present invention may have unstable melt spinning when its relative viscosity is low, those having a relative viscosity of 3.0 or more are preferable. If the intrinsic viscosity is low, melt spinning may become unstable, so that the intrinsic viscosity is preferably 0.6 or more.

  The relative viscosity of the polyamide resin was measured by dissolving 0.25 g of a polyamide resin in 25 cc of sulfuric acid having a concentration of 98% and using an Ostwald viscosity tube at 25 ° C. Yes, the intrinsic viscosity of the polyester resin was measured by dissolving 2.0 g of the polyester resin in 25 ml of orthochlorophenol having a concentration of 98.5% and using an Ostwald viscosity tube at 25 ° C. It is a thing.

  Next, as the abrasive particles contained in the protrusions 3 of the multifilamentary monofilament constituting the bristle material for the polishing brush of the present invention, silicon carbide, green silicon carbide, alumina oxide, artificial diamond, and the like are used. As for the granularity count, those of # 800 to # 2000 can be used. In the present invention, in order to more effectively reduce the falling off of the abrasive particles, the surface of the abrasive particles to be used can be preliminarily subjected to silane coupling treatment.

  The method for producing the bristle material for an abrasive brush of the present invention is not particularly limited. First, the thermoplastic resin (A), the resin composition of the thermoplastic resin (B) and abrasive particles are separately prepared by a known method. Supplying to an extruder, the former is a monofilament body 2 and the latter is extruded from a composite spinneret so as to form the ridges 3 respectively, thereby producing a multileaf monofilament, and after appropriately stretching and heat-treating, By cutting this multileaf monofilament to a required length to form a bristle, the bristle material for an abrasive brush of the present invention can be obtained.

  The bristle material for an abrasive brush of the present invention thus obtained is used for at least a part of an abrasive brush such as a disk roll brush, a channel roll brush, a cup-shaped brush and a foil brush, and the obtained abrasive brush contains abrasive particles. In addition to the effect that there is no hair breakage, there is no breakage of the bristle material during cleaning and polishing, etc., in addition to the effect that the bristle material for abrasive brushes is higher than the conventional bristle material.

  Hereinafter, the configuration and effects of the present invention will be further described with reference to examples.

  In addition, the drop-off evaluation, breakage durability evaluation, and polishing evaluation of abrasive grains in the following examples were performed by the following methods.

[Evaluation of abrasive particle shedding]
Twenty bristles cut to 50 mm were bundled, and the mass A (g) of the bundle was first measured. Next, this bundle was sandwiched between two upper and lower metal plates, and the upper metal plate was reciprocated for 5 minutes in a reciprocating distance of 5 cm in the direction in which the monofilament bundle rolls while being pressed with a load of 1 kg. Thereafter, the mass B of the monofilament bundle was measured again, and the abrasive particle dropout rate (%) was calculated from the following formula 100 × (AB) / A. A lower abrasive particle dropout rate (%) indicates less abrasive particle dropout.

[Fracture durability]
Using a flexural sag fatigue (MIT) testing machine described in JIS P8115, the load is 15.7 N (1.5 kgf), the bending angle is 270 ° (left and right 135 °), and the speed is 175 ± 10 times per minute. The monofilament was repeatedly bent, and the number of reciprocal bendings until the monofilament was cut was measured 5 times. The larger the average of these five measurements, the better the breakage durability.

[Abrasiveness]
Using the obtained monofilament, a cup-shaped brush having an inner diameter of 45 mm, an outer diameter of 70 mm, and a hair length of 30 mm was produced. And this cup-shaped brush was attached to the hand grinder, the uneven | corrugated surface of the metal plate which has an unevenness | corrugation by pressure 50N and rotation speed 8000rpm was grind | polished for 1 minute, and the state after grinding | polishing of a metal surface was confirmed visually.
◎; Good polishing state of uneven surface of the object to be polished,
○: The polished state of the uneven surface of the object to be polished is normal.
X: The polished state of the uneven surface of the object to be polished was poor.

[Example 1]
As the thermoplastic resin constituting the monofilament body, a nylon resin having a relative viscosity of 3.8 (N610, M2041 manufactured by Toray Industries, Inc.) was continuously projected in parallel to the outer circumference in the fiber axis direction of the monofilament body. As the thermoplastic resin constituting the strip, a polyester resin having an intrinsic viscosity of 6.3 (PEN, PN640 manufactured by Toyobo Co., Ltd.) and a silane coupling agent (SH6040 manufactured by Toray Dow Corning Silicone Co., Ltd.) 0.2 Using a resin composition consisting of 5% by weight of silicon carbide abrasive particles having a particle size of # 1500 coated by weight% (made by Showa Denko KK), these were supplied to a compound melt spinning machine, each at a temperature of 280 ° C. After being melt-kneaded in Fig. 1, after extrusion from the multi-leaf section hole nozzle, the extruded yarn was cooled and solidified in a cooling bath at 30 ° C, and then heated at 190 ° C. By stretching to 6.0 times in the atmosphere to obtain a monofilament with an average diameter of 0.6 mm.

  Table 1 shows the results of producing a cup-shaped brush having the above-described configuration using the hair material thus obtained and evaluating the cup-shaped brush.

[Example 2]
A bristle material for an abrasive brush was obtained under the same conditions as in Example 1 except that the thermoplastic resin constituting the monofilament body was changed to a nylon resin having a relative viscosity of 3.5 (N612, D22 manufactured by Daicel Degussa). And the cup-shaped brush was created using the obtained bristle material, and the result of having evaluated is shown in Table 1.

[Example 3]
A bristle material for an abrasive brush was obtained under the same conditions as in Example 1 except that the number of the plurality of ridges continuously protruding in parallel to the outer periphery in the fiber axis direction of the monofilament main body was changed from five to three. And the cup-shaped brush was created using the obtained bristle material, and the result of having evaluated is shown in Table 1.

[Comparative Example 1]
On the outer periphery in the fiber axis direction of the monofilament main body, a thermoplastic resin constituting a plurality of ridges continuously protruding in parallel with the fiber axis is the same as the monofilament main body of a nylon resin (Toray ( A bristle material for an abrasive brush was obtained under the same conditions as in Example 1 except that the product was changed to N610, M2041). In this case, in addition to inferior durability of the bristle material, the abrasiveness was poor and the results of the present invention were not satisfied. The evaluation results are shown in Table 1.

[Comparative Example 2]
A bristle material for an abrasive brush was obtained under the same conditions as in Example 1 except that the monofilament main body had a ridge that continuously protruded in parallel to the outer circumference in the fiber axis direction. The evaluation results are shown in Table 1.

[Comparative Example 3]
A polishing brush was obtained under the same conditions as in Example 1 except that the number of ridges continuously protruding in parallel to the outer periphery in the fiber axis direction of the monofilament main body was five and abrasive particles were not contained. The evaluation results are shown in Table 1.

[Comparative Example 4]
In Example 1, the resin constituting the monofilament body is changed to a polyester resin (PEN, PN640 manufactured by Toyobo Co., Ltd.), and the resin forming the ridge portion is changed to a nylon resin (N610, M2041 manufactured by Toray Industries, Inc.). A polishing brush was obtained under the same conditions as in Example 1 except that. The evaluation results are shown in Table 1.

  As is apparent from the results in Table 1, the polishing brush made of the polishing brush bristle material (Examples 1 to 3) that satisfies the conditions of the present invention exhibits higher polishability with respect to the object to be polished than the conventional one. The waist was high, the drop rate of abrasive particles was low, and the breakage durability was good.

  On the other hand, the polishing brush made of the bristle material for abrasive brushes (Comparative Examples 1 to 4) that does not satisfy the conditions of the present invention not only has low fluff and poor abrasiveness, but also has a low dropout rate of abrasive particles, resulting in breakage. The durability was also inferior.

  The bristle material for a polishing brush of the present invention can efficiently polish to every corner of the uneven surface of the surface in the deburring polishing process of the surface and end surface of the uneven portion of the complex part of the object to be polished. Compared to bristle materials for polishing brushes, the fluffiness is low, the abrasive particle drop-off rate is small, and the durability against breakage is excellent. Disc roll brush, channel roll brush, cup shape used for deburring and polishing of machine parts that are likely to cause product safety problems when defective or broken hair material or dropped abrasive particles adhere to it When applied to brushes and foil brushes, these effects can be exhibited without regret.

(A) is a side view which shows an example of the bristle material for polishing brushes of this invention, (b) is the sectional view on the AA line of (a).

Explanation of symbols

1 bristle 2 monofilament body
3 ridges

Claims (6)

It is a bristle composed of a multi-leaf cross-sectional monofilament having a plurality of ridges protruding continuously in parallel to the fiber axis on the outer periphery in the fiber axis direction of the thermoplastic resin monofilament body, wherein the ridges are A bristle material for an abrasive brush comprising a resin composition of a thermoplastic resin (B) different from the thermoplastic resin (A) forming the monofilament main body and abrasive particles. The bristle material for an abrasive brush according to claim 1, wherein the number of ridges present on the outer periphery of the cross-section of the multifilamentary monofilament is in the range of 2-6. The thermoplastic resin (A) is nylon 6/610 copolymer and / or nylon 6/612 copolymer, and the thermoplastic resin (B) is polyethylene naphthalate. 2. A bristle material for a polishing brush according to 2. The resin composition which comprises the said protruding item | line part consists of 80 to 95 weight% of thermoplastic resins (B), and 20 to 5 weight% of abrasive material particles, The any one of Claims 1-3 characterized by the above-mentioned. The bristle material for abrasive brushes as described. 5. The abrasive material for an abrasive brush according to claim 1, wherein the abrasive particles have a particle size of # 800 to 2000. 6. A polishing brush, wherein the bristle material for an abrasive brush according to any one of claims 1 to 5 is used for at least a part of the bristle material.

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