JP2008213115A - Bristle material for polishing brush and polishing brush - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bristle material for a polishing brush, which has high polishing performance to a workpiece compared with a conventional one, suppresses occurrence of polishing mottles, and is excellent in brush hair transplantation. <P>SOLUTION: The bristle material for a polishing brush is formed by a spiral twist in a longitudinal direction of a monofilament having a modified cross section produced by melt-spinning a synthetic resin composition containing polishing abrasive grains. The bristle material is used in the polishing brush as at least a part thereof. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an improvement in a bristle material for an abrasive brush used for polishing the surface and end surface of an object to be polished such as a metal member, and more specifically, when used for an abrasive brush, it is more than conventional. The present invention relates to a bristle material for a polishing brush and a polishing brush that can efficiently deburr a polishing body, have high polishing performance, and can suppress generation of polishing spots.

  Conventionally, a bristle material made of synthetic resin monofilament containing abrasive particles is known as a bristle material for polishing brushes used in polishing of the surface and end face of a metal member, and this bristle material was used. Examples of the polishing brush include a disc roll brush, a channel roll brush, and a cup-shaped brush.

  These polishing brushes are used for polishing and deburring the surface of an object to be polished such as a metal member by pressing the object to be polished and further applying rotation. Various investigations have been made to improve the above.

  Particularly in recent years, various functions have been required for polishing brushes, and various types of bristle materials for polishing brushes have been proposed.

  For example, as shown in FIG. 5A, there is known a polishing brush bristle material 10 (see, for example, Patent Document 1) in which the cross-sectional shape of the abrasive resin particle-containing synthetic resin monofilament is quadrangular. However, since this bristle material 10 has corners 11 in the side surface longitudinal direction, the grinding force is higher than that of the round cross-sectional shape, but as shown in FIG. Since the side surface 12 or the corner portion 11 of the bristle material 10 is only polished in parallel by surface contact or line contact with respect to 13, there is a problem that the polishing and deburring ability of the surface of the object 13 is not sufficient. there were.

  Further, a polishing brush bristle material (for example, see Patent Document 2) in which the cross-sectional shape of the abrasive resin particle-containing synthetic resin monofilament has a multi-lobed irregular cross-section has already been proposed. However, this bristle material also has a deburring ability that is not sufficient for the same reason as described above, and a weakness in the grinding performance remains as a problem. It was.

Thus, although the conventional polishing brush hair materials have specific characteristics, they do not satisfy all the properties required for polishing brush hair materials, so further improvements are frequently required. Has been.
JP 2003-181769 A Registered Patent No. 1693185

  The present invention has been achieved as a result of studying the solution of the problems in the prior art as an object.

  That is, the object of the present invention is to efficiently deburr the surface of the object to be polished as compared with conventional bristle materials for polishing brushes, have high polishing performance, and have polishing spots on the object to be polished. An object of the present invention is to provide a bristle material for an abrasive brush that can suppress the occurrence of the above and an abrasive brush using the bristle material for an abrasive brush.

  In order to achieve the above object, according to the present invention, a helical twist is formed in the longitudinal direction of a deformed cross-section monofilament formed by melt spinning an abrasive particle-containing synthetic resin composition. A bristle material for an abrasive brush is provided.

In the hair material for polishing brush of the present invention,
The cross-sectional shape of the irregular cross-section monofilament is a polygonal cross section of 3 to 6 hexagons;
The cross-sectional shape of the irregular cross-section monofilament is a multi-leaf cross section having two or more spherical convex portions and a concave portion located between the spherical convex portions, and the number of twists formed in the longitudinal direction of the irregular cross-section monofilament However, 10 rotations / m to 80 rotations / m are all preferable conditions, and by satisfying these conditions, further excellent effects can be obtained.

  In addition, the polishing brush of the present invention is characterized in that the above-described polishing brush bristle material is used as at least a part of the bristle material.

  As described below, according to the present invention, the object to be polished can be efficiently polished by the spiral corners and the tips of the spiral protrusions along the longitudinal direction of the bristle material. It is possible to obtain a polishing brush bristle material and this polishing brush that can efficiently perform polishing, have high polishing performance, and can suppress the occurrence of polishing spots on the object to be polished.

  Hereinafter, the present invention will be specifically described with reference to the drawings.

  FIG. 1: is the front view (a) which showed an example of the bristle material for polishing brushes of this invention, and the AA sectional view (b) of (a).

  The bristle material 1 for an abrasive brush in FIG. 1 (a) is formed by forming a helical twist in the longitudinal direction of an irregularly shaped monofilament formed by melt spinning an abrasive particle-containing synthetic resin composition, The cross-sectional shape of the monofilament is a polygon (quadrangle), 1 is a bristle material for an abrasive brush, 2 is a flat surface portion, and 3 is a corner portion.

  Moreover, Fig.2 (a) is the front view (a) which showed another example of the bristle material for polishing brushes of this invention, and the BB sectional drawing (b) of (a).

  The bristle material 4 for an abrasive brush in FIG. 2 (a) is formed by forming a helical twist in the longitudinal direction of a modified monofilament monofilament obtained by melt spinning the abrasive abrasive particle-containing synthetic resin composition, The cross-sectional shape of the monofilament is a multi-leaf shape (trilobal shape), 4 is a polishing brush bristle material, 5 is a convex portion, and 6 is a concave portion.

  When the above-described spiral corner 3 and convex part 5 are used as a polishing brush, the surface of the object to be polished can be efficiently polished and deburred. It plays an important role.

  That is, the high abrasiveness of the bristle material for an abrasive brush according to the present invention will be described as follows with reference to the drawings.

  FIG. 3 and FIG. 4 are schematic views showing the polished state of the bristle material, wherein (a) is a front view of the surface to be polished, and (b) is a plan view showing a polishing portion of the surface to be polished.

  FIG. 3 shows the polishing state of the bristle material 1 for the polishing brush shown in FIG. 1, wherein 8 indicates the polishing portion and 7 indicates the polishing surface.

  FIG. 4 shows the polished state of the polishing brush bristle material 4 shown in FIG. 1, wherein 9 indicates the polishing portion and 7 indicates the polishing surface.

  As shown in FIG. 5B, in the conventional polishing brush bristle material 10, the side surface 12 or the corner 11 of the bristle material 10 is parallel to the surface 7 to be polished by surface contact or line contact. Since only polishing is performed, the polishing and deburring ability of the surface of the object to be polished is not sufficient.

  On the other hand, according to the bristle materials 1 and 4 for polishing brushes of the present invention, the corner portions 3 and the convex portions 5 are formed by twisting, so that the corner portions 3 and the convex portions 5 are covered. Since polishing is performed in such a manner that the polishing surface 7 is scraped obliquely, a plurality of polishing portions 8 and 9 are continuously formed, so that it is possible to obtain an unprecedented strong polishing force. It becomes. Further, the bristle material for an abrasive brush according to the present invention can form the abrasive portions 8 and 9 uniformly, so that it is difficult to produce abrasive spots and is excellent in the flocking property to the brush base material.

  Here, the number of twists of the bristle material for polishing brush of the present invention is preferably 10 to 80 rotations / m, and more preferably 50 to 80 rotations.

  The reason for this is that when the number of twists is less than the above range, the polishing parts 8 and 9 shown in FIGS. 3 and 4 approach parallel to the polishing surface, so that not only the polishing property is poor, but also the surface to be polished is scratched. In the case of exceeding the above range, the durability of the bristle material decreases and the physical properties are easily affected, and the polishing section 8 shown in FIGS. This is because, since 9 and 9 are nearly perpendicular to the polishing direction of the polishing surface, the surface to be polished tends to be damaged.

  Moreover, it is preferable that the polygonal cross-sectional shape of the bristle material 1 for abrasive brushes is a 3-6 hexagon, and it is more preferable that it is a 3-4 tetragon.

  The reason for this is that if the cross-sectional shape is hexagonal or more, the polished part becomes more obtuse and the ability to polish and deburr the surface to be polished tends to be inferior.

  For the same reason, the multi-leaf cross-sectional shape such as the polishing brush bristle material 4 is a multi-lobe cross-section having two or more spherical convex portions 5 and a concave portion 6 positioned between the spherical convex portions. It is preferable.

  The polishing brush bristle 1 shown in FIG. 1 is not particularly limited, but is suitable for efficiently removing coarse burrs and the like, and the abrasive brush bristle 4 shown in FIG. Since it is suitable for efficient removal, it is also possible to use it according to the purpose.

  As a means for forming a twist in the bristle material for polishing brush of the present invention, no special method is required, and for example, it can be easily formed by twisting the bristle material for abrasive brush and heat setting. .

  Further, the synthetic resin constituting the bristle material for the polishing brush of the present invention is not particularly limited, but nylon 6, nylon 66, nylon 610, nylon 612, nylon 46, nylon MDX6, nylon 11, nylon 12, poly (coupleramide) / Hexamethylene adipamide) copolymer and poly (capramide / lauramide) copolymer and other polyamide resins, polyethylene terephthalate, polybutylene terephthalate, polypropylene terephthalate, polyethylene naphthalate, polymethylene naphthalate, polybutylene naphthalate, Polyester resins such as polypropylene naphthalate, polyphenylene sulfide, polytetrafluoroethylene, perfluoroethylene / propylene copolymer, ethylenetetrafluoroethylene copolymer, Lichlorotrifluoroethylene copolymer, polyvinylidene fluoride, polyvinyl fluoride, tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer, tetrafluoroethylene / perfluorodioxole copolymer, tetrafluoroethylene / hexafluoropropylene Copolymer, tetrafluoroethylene / hexafluoropropylene / vinylidene fluoride copolymer, fluororesin such as tetrafluoroethylene / ethylene chloride copolymer, fluorovinyl ether copolymer, polyolefin resin, etc. Any of them may be used, and one kind or two or more kinds of resins may be appropriately selected and used. Further, although not particularly limited, polyamide resin such as nylon 6, nylon 610, nylon 612, or the like, or polyethylene terephthalate, polybutylene terephthalate, polyethylene because of excellent abrasion and breakage durability as a polishing brush hair material. The use of polyester resins such as naphthalate is preferred.

  Furthermore, the synthetic resin constituting the bristle material for the polishing brush of the present invention has an antioxidant, a light resistance agent, a weather resistance agent, a flame retardant, inorganic particles, depending on the purpose, as long as the effect of the present invention is not impaired. In addition to pigments and the like, it is also possible to add polycarbodiimide compounds for the purpose of improving the hydrolysis resistance of polyester resins, silicone oils for the purpose of preventing welding of hair materials to the object to be polished, and the like.

  Next, examples of the abrasive abrasive particles contained in the bristle material for an abrasive brush of the present invention include abrasive abrasive particles made of silicon carbide, green silicon carbide, alumina oxide, artificial diamond, and the like. Although it can select suitably according to this, It is preferable that the particle size count of abrasive grain is the range of # 36-3000, and it is further preferable that it is the range of # 60-1000.

  When the particle size count of the abrasive abrasive particles is below the above range, the polishability is improved, but the bristle material tends to become brittle, and it is not preferable because it tends to be broken when used as an abrasive brush. . On the contrary, when the particle size count exceeds the above range, it is not preferable because it tends to be a bristle material with low abrasiveness.

  The content of abrasive abrasive particles contained in the bristle material for abrasive brush is preferably in the range of 5 to 40% by weight, more preferably in the range of 10 to 30% by weight, based on the total weight of the bristle material.

  When the content of the abrasive abrasive particles is below the above range, it is not preferable because it tends to be a hair material having low abrasiveness. Conversely, when the content exceeds the above range, although the polishability is improved, melt spinning is performed. In this case, not only spinning stability becomes difficult to obtain, but the bristle material tends to become brittle, and when used as an abrasive brush, breakage tends to occur, which is not preferable.

  Next, the manufacturing method of the bristle material for polishing brushes of this invention is demonstrated.

  First, it is not necessary to use any special production apparatus for the production of the synthetic resin monofilament, and for example, it can be produced using a known extruder type melt spinning machine.

  Specifically, when producing a monofilament with an abrasive-containing synthetic resin deformed section using a polyamide-based resin, a preliminarily dried polyamide-based resin and a predetermined amount of abrasive abrasive particles are supplied to a twin-screw extrusion melt spinning machine. Then, the melt-kneaded mixture of synthetic resin and abrasive abrasive particles is extruded from a spinneret having a discharge hole having an irregular cross-sectional shape, cooled and solidified, heated and stretched, and subjected to heat relaxation treatment as necessary, and then wound up.

  Then, the monofilament once wound up is subjected to heat set processing while twisting, for example, so as to be helically twisted along the longitudinal direction of the side surface, and once wound into a bundle.

  Next, the hair material for an abrasive brush of the present invention is obtained by cutting the twisted monofilament into a length corresponding to the use of the abrasive brush.

  In addition, the bristle material for abrasive brushes of the present invention can be given a wave shape in the longitudinal direction of the side surface according to the use of the abrasive brush.

  The polishing brush of the present invention is obtained by implanting a bristle material for polishing brush made of monofilament obtained by the above-described manufacturing method on a brush base material, and is obtained by a known manufacturing method.

  As described above, the bristle material for abrasive brushes of the present invention is used for conventional abrasive brushes when used for at least part of the bristle material of abrasive brushes such as roll brushes, cup brushes, cylindrical brushes and foil brushes. Compared with the bristle material, the surface to be polished can be efficiently polished and deburred, and the occurrence of polishing spots on the surface to be polished can be suppressed, so that the effect is extremely advantageous.

  Hereinafter, the hair material for an abrasive brush of the present invention will be described in detail with reference to examples. However, the present invention is not limited to the following examples unless it exceeds the gist.

  In the following examples and comparative examples, the evaluation of the polishing property, flocking property, and polishing state was performed as follows. In the following evaluation, monofilaments having a diameter of 1.0 mm were used.

[Abrasiveness]
Using the monofilaments obtained in Examples and Comparative Examples, cup-shaped brushes having an inner diameter of 45 mm, an outer diameter of 70 mm, and a hair length of 50 mm were prepared. Then, this cup-shaped brush was attached to a hand grinder, the surface of the brass metal plate was polished for 30 minutes at a pressure of 50 N and a rotation speed of 12000 rpm, and the mass of the scraped brass metal was measured. The larger the mass of the scraped brass metal, the better the abrasiveness. This operation was continuously repeated 5 times, and the average value of the mass of the brass metal shaved off was calculated.

[Flocking]
Using the monofilaments obtained in Examples and Comparative Examples, cup-shaped brushes having an inner diameter of 45 mm, an outer diameter of 70 mm, and a hair length of 50 mm were prepared. The flocking property of the prepared cup brush was confirmed visually. In addition, it determined with the following reference | standard on the basis of the hair material of the comparative example 2. FIG.
Flocking variation is far inferior to Comparative Example 2: ×
The flocking variation is inferior to Comparative Example 2: Δ
Flocking variation is equivalent to Comparative Example 2: ○
Flocking variation is superior to Comparative Example 2:

[Polished state]
Using the monofilaments obtained in Examples and Comparative Examples, cup-shaped brushes having an inner diameter of 45 mm, an outer diameter of 70 mm, and a hair length of 50 mm were prepared. Then, this cup-shaped brush was attached to a hand grinder, and the surface of the brass metal plate was polished for 30 minutes at a pressure of 50 N and a rotation speed of 12000 rpm, and polishing spots were confirmed. This operation was continuously repeated 5 times, and the final 3 times of polishing spots on the surface of the brass metal plate were confirmed and judged according to the following criteria.
There are too many polishing spots and it is not polished evenly: x
There are polishing spots, not evenly polished: △
There are few polishing spots and it is polished uniformly to some extent: ○
There is no polishing spot and it is polished uniformly: ◎

[Example 1]
Covering 77% by weight of nylon 610 resin (N610, M2041 manufactured by Toray Industries, Inc.) having a relative viscosity ηr of 3.8 and 0.2% by weight of silane coupling agent (SH6020 manufactured by Toray Dow Corning Silicone Co., Ltd.) A mixture of the processed silicon carbide abrasive particles having a particle size of # 100 (manufactured by Showa Denko Co., Ltd.) 23% by weight was supplied to a twin-screw extrusion spinning machine, melt-kneaded at a temperature of 250 ° C., and then 2.0 mm A square section monofilament having an average side length of 1.0 mm was obtained by extruding from a square section hole nozzle having a square size of 2.0 mm, cooling and solidification, and heating and stretching 3.2 times at a temperature of 200 ° C.

  The obtained monofilament was twisted in the longitudinal direction of the side surface and heat-set at a temperature of 130 ° C. to obtain a monofilament (hereinafter referred to as a twisted hair material) in which the twisting was applied in the longitudinal direction of the side surface.

  Next, a cup brush was prepared using the obtained bristle material made of the monofilament, and the polishing property, flocking property, and polishing state were evaluated. The results are shown in Table 1.

[Example 2]
A twisted hair material was obtained under the same conditions as in Example 1 except that the cross-sectional shape of the monofilament was changed to a triangle. And the cup brush was created using the obtained bristle material, and polishing property, flocking property, and the grinding | polishing state were evaluated. The results are shown in Table 1.

[Example 3]
A twisted hair material was obtained under the same conditions as in Example 1 except that the cross-sectional shape of the monofilament was changed to a hexagon. And the cup brush was created using the obtained bristle material, and polishing property, flocking property, and the grinding | polishing state were evaluated. The results are shown in Table 1.

[Example 4]
A twisted hair material was obtained under the same conditions as in Example 1 except that the cross-sectional shape of the monofilament was changed to a trilobal shape. And the cup brush was created using the obtained bristle material, and polishing property, flocking property, and the grinding | polishing state were evaluated. The results are shown in Table 1.

[Example 5]
A twisted hair material was obtained under the same conditions as in Example 1 except that the cross-sectional shape of the monofilament was changed to a four-leaf shape. And the cup brush was created using the obtained bristle material, and polishing property, flocking property, and the grinding | polishing state were evaluated. The results are shown in Table 1.

[Example 6]
A twisted hair material was obtained under the same conditions as in Example 1 except that the cross-sectional shape of the monofilament was changed to a six-leaf shape. And the cup brush was created using the obtained bristle material, and polishing property, flocking property, and the grinding | polishing state were evaluated. The results are shown in Table 1.

[Comparative Example 1]
A hair material was obtained under the same conditions as in Example 1 except that the cross-sectional shape of the monofilament was changed to a circle and no twist was applied. And the cup brush was created using the obtained bristle material, and polishing property, flocking property, and the grinding | polishing state were evaluated. The results are shown in Table 1.

[Comparative Example 2]
A hair material was obtained under the same conditions as in Example 1 except that the monofilament was not twisted. And the cup brush was created using the obtained bristle material, and polishing property, flocking property, and the grinding | polishing state were evaluated. The results are shown in Table 1.

[Comparative Example 3]
A hair material was obtained under the same conditions as in Example 4 except that no twist was applied to the monofilament. And the cup brush was created using the obtained bristle material, and polishing property, flocking property, and the grinding | polishing state were evaluated. The results are shown in Table 1.

[Comparative Example 4]
A hair material was obtained under the same conditions as in Example 5 except that no twist was applied to the monofilament. And the cup brush was created using the obtained bristle material, and polishing property, flocking property, and the grinding | polishing state were evaluated. The results are shown in Table 1.

  As is apparent from the results in Table 1, the cup brush made of the polishing brush bristle material (Examples 1 to 6) that satisfies the conditions of the present invention exhibits higher abrasiveness to the object to be polished than conventional ones, and flocking The properties were also excellent and very excellent with no polishing spots.

  On the other hand, the cup brush made of the bristle material for abrasive brushes (Comparative Examples 1 to 4) that does not satisfy the conditions of the present invention has not only low abrasiveness but also poor flocking properties, and many polished spots are seen on the surface to be polished. It was

  The abrasive brush hair material of the present invention, when used for at least a part of the abrasive brush hair material such as a roll brush, cup brush, cylindrical brush and foil brush, compared to the conventional abrasive brush hair material, Since the surface to be polished can be efficiently polished and deburred, and the occurrence of polishing spots on the surface to be polished can be suppressed, the effect is extremely advantageous.

It is the front view (a) which showed an example of the bristle material for polishing brushes of this invention, and the AA sectional view (b) of (a). It is the front view (a) which showed other examples of the bristle material for abrasive brushes of the present invention, and the BB line sectional view (b) of (a). FIG. 2 shows a polished state of the bristle material 1 for a polishing brush shown in FIG. 1, (a) is a front view of a surface to be polished, and (b) is a plan view showing a polishing portion of the surface to be polished. FIG. 3 shows a polished state of the bristle material 4 for a polishing brush shown in FIG. 2, (a) is a front view of the surface to be polished, and (b) is a plan view showing a polishing portion of the surface to be polished. The grinding | polishing state of the bristle material 10 for polishing brushes which consists of the conventional round cross-section monofilament is shown, (a) is a front view of a to-be-polished surface, (b) is a top view which shows the grinding | polishing part of a to-be-polished surface.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bristle material for polishing brushes 2 Planar part 3 Corner part 4 Bristle material for abrasive brushes 5 Convex part 6 Concave part 7 Polishing surface 8 Polishing part 9 Polishing part 10 Polishing brush bristle material (conventional example)
11 Corner (conventional example)
12 Side view (conventional example)

Claims (5)

A bristle material for an abrasive brush, wherein a helical twist is formed in the longitudinal direction of an irregularly shaped monofilament obtained by melt spinning an abrasive resin particle-containing synthetic resin composition. The bristle material for an abrasive brush according to claim 1, wherein the cross-sectional shape of the irregular-shaped monofilament is a polygonal cross section having 3 to 6 hexagons. The bristle material for a polishing brush according to claim 1, wherein the cross-sectional shape of the irregular-shaped monofilament is a multi-leaf cross section having two or more spherical convex portions and a concave portion located between the spherical convex portions. . The bristle material for an abrasive brush according to any one of claims 1 to 3, wherein the number of twists formed in the longitudinal direction of the irregularly shaped monofilament is 10 rotations / m to 80 rotations / m. 5. A polishing brush comprising the bristle material for an abrasive brush according to any one of claims 1 to 4 as at least a part of the bristle material.

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