JP2008213116A - Brush bristle material for polishing and polishing brush - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide brush bristle material for polishing and a polishing brush, which efficiently performs polishing up to corners of uneven faces on the surfaces of mechanical components, and displays durability and long lasting polishing performance. <P>SOLUTION: This brush bristle material is made of a sea-island structure composite monofilament. An island part of the composite monofilament is made of a mixture of synthetic resin and abrasive particles. A sea part is made of other synthetic resin different from the synthetic resin of the island part. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an improvement of a brush material for polishing used for polishing a metal surface in a deburring polishing process of a metal member such as a steel plate or a machine part, and more particularly, metal member, machine part. The present invention relates to a polishing brush bristle material and a polishing brush that can be efficiently polished to every corner of the concavo-convex surface of the surface, and further exhibit durability and continuous polishing performance.

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

  Since the surface to be polished of these metal members or machine parts is not only a flat surface but also a surface to be polished such as an uneven surface, the polishing deburring process is difficult. In addition, since abrasive particles fall off during polishing deburring and remain on machine parts, leading to defects in the final product, handling of the polishing brush is particularly severe.

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

  However, the brush material for polishing with silane coupling treatment is improved to some extent compared with the brush material for polishing brush without silane coupling treatment. Also, it did not exhibit a sufficient effect to prevent the abrasive particles from falling off, and the bristle material was sometimes broken due to the low bending fatigue of the root portion of the planted hair material.

  In addition, with the abrasive brush bristle material covered with multi-fibers, the bristle materials also rub against each other strongly, so that the multi-fibers are unraveled, and the multi-fibers break off and adhere to machine parts. There has also been a problem that the abrasive particles fall off from the unraveled locations and the abrasive particles adhere to the surface of the metal member or machine part, and further improvement of the polishing brush bristle material has been strongly demanded.

Furthermore, with conventional polishing brushes using polishing brush bristle materials, the diameter of the polishing brush bristle material is limited, and that alone cannot cope with the complex uneven surface of machine parts. However, there has been a demand for the realization of a brush material for polishing that can continuously exhibit polishing performance.
JP 55-51813 A JP 2001-327565 A

  It is an object of the present invention to be able to efficiently polish every part of the uneven surface of the surface of a machine part in a deburring polishing process of the surface and end face of a metal member such as a steel plate or a machine part, and is durable and continuous. An object of the present invention is to provide a polishing brush bristle material and a polishing brush that exhibit excellent polishing performance.

  In order to achieve the above object, according to the present invention, a polishing brush bristle material comprising a sea-island structure composite monofilament, wherein the island part of the composite monofilament comprises a mixture of synthetic resin and abrasive particles, and the sea part comprises A polishing brush bristle material comprising a synthetic resin different from the synthetic resin of the island portion is provided.

In the polishing brush hair material of the present invention,
The number of island parts of the composite monofilament is 2 or more;
At least one end of the composite monofilament, the island part is exposed without being covered with the sea part, and the length of the exposed part of the island part is 1 to 10 mm,
The synthetic resin constituting the island part of the composite monofilament is a polyamide resin, and the synthetic resin constituting the sea part is a polyester resin;
The synthetic resin constituting the island part of the composite monofilament is a polyester resin, and the synthetic resin constituting the sea part is a polyamide resin;
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 polishing brush bristle material is used as at least a part of the bristle material, and the abrasive particles are hardly dropped from the abrasive brush bristle material. Advantages such as excellent and continuous polishing performance, which are not found in conventional polishing brush hair materials, can be obtained.

  ADVANTAGE OF THE INVENTION According to this invention, in the deburring grinding | polishing process of the surface and end surface of metal members, such as a steel plate, or a machine part, it can grind | polish efficiently to every corner of the uneven surface of the surface of a machine part, and also durability and continuous Polishing brush bristle material and polishing brush exhibiting excellent polishing performance can be obtained.

  The polishing brush bristle material and the polishing brush of the present invention will be described in detail below.

  The polishing brush hair material of the present invention is a polishing brush hair material made of sea-island structure composite monofilament, wherein the island portion of the composite monofilament is made of a mixture of synthetic resin and abrasive particles, and the sea portion is an island portion. It consists of another synthetic resin different from a synthetic resin.

  That is, the abrasive brush bristle material of the present invention is composed of a sea-island structure composite monofilament in which a sea part made of another synthetic resin is formed around an island part made of synthetic resin and abrasive particles. It is excellent in durability that the falling off is extremely reduced, there is no breakage due to rubbing between the hair materials at the time of deburring and polishing, and the bending fatigue property of the root portion of the hair material planted is also excellent.

  Here, the synthetic resin constituting the core and sheath of the sea-island structure composite monofilament constituting the polishing brush hair material of the present invention includes nylon 6, nylon 66, nylon 610 (hereinafter referred to as N610), nylon 612, Polyamide resins such as nylon 6/66 copolymer and nylon 6/12 copolymer, polyethylene terephthalate, polybutylene terephthalate (hereinafter referred to as PBT), polyethylene naphthalate, polypropylene terephthalate, polymethylene naphthalate, polybutylene naphthalate Polyester resins such as polypropylene, low density and high density polyethylene, polyolefin resins such as syndiotactic or atactic or isotactic polystyrene, polyphenylene sulfide, polystyrene poly Polyolefin elastomers such as blends of styrene-based elastomers such as tadiene / polystyrene block copolymers, polystyrene / polyisoprene / polystyrene block copolymers, olefin rubbers such as ethylene / propylene / diethylene copolymers, and polyolefins such as polypropylene or ethylene, polyurethane elastomers Fluorine resins such as polyester elastomer, fluororubber elastomer, polyether ester, polyurethane, polycarbonate, polyarylate, ethylene tetrafluoroethylene, and polyvinylidene fluoride can be used. For the reason that the sheath at one end of the bristle material can be dissolved using an alkaline solution and the island can be easily exposed, Is preferably used for polyamide resins and polyester resins, furthermore PBT, the use of N610 and N612 are more preferred.

  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.

  In the composite monofilament constituting the polishing brush bristle material of the present invention, the reason for forming the sea part from another synthetic resin different from the synthetic resin of the island part is that when the island part and the sea part are formed from the same synthetic resin, This is because the sea part is difficult to peel off, so that the island part containing abrasive particles becomes difficult to be exposed during the deburring and polishing operations, and the polishing performance is not easily exhibited.

  Next, for the abrasive particles contained in the island part of the composite monofilament constituting the polishing brush bristle material of the present invention, silicon carbide, green silicon carbide, alumina oxide, artificial diamond, etc. can be used, Regarding the count, those of # 80 to # 3000, particularly # 240 to # 1500 can be preferably used.

  In addition, the content of abrasive particles contained in the island portion tends to have insufficient polishing ability when the amount is small, and conversely, when the amount is large, the strength of the polishing brush bristle material only decreases. Or, since the durability against breakage tends to decrease, it is preferably in the range of 5 to 40% by weight, more preferably in the range of 10 to 30% by weight with respect to the synthetic resin of the island part. .

  Moreover, in the composite monofilament constituting the polishing brush hair material of the present invention, the weight ratio of the sea part is preferably 40 to 90%, more preferably 50 to 70% with respect to the total weight of the composite monofilament. More preferably.

  This is because when the weight ratio of the sea part is below the above range, the sheath part is damaged by the abrasive particles contained in the island part, and as a result, the abrasive particles tend to fall off. This is because when the ratio exceeds the above range, the content of the abrasive particles is reduced with respect to the entire hair material, and the polishability tends to decrease.

  Furthermore, the composite monofilament constituting the polishing brush bristle material of the present invention is more preferably exposed at least at one end without being covered with the sea, and thus forming one end of the composite monofilament in this way. By this, since the island part containing an abrasive particle is exposed, the brush hair material for polishing with higher polishability is obtained.

  Moreover, it is preferable that the length of the part which the island part exposed is 1-10 mm, and it is more preferable that it is 2-6 mm.

  This is because if the exposed length of the island part falls below the above range, it is difficult to obtain a further improvement in polishing properties.On the contrary, if the above range is exceeded, the fluff of the exposed part of the island part becomes weak, and the polishing performance This is because the abrasive particles tend to fall off.

  In addition, as a method of exposing the island part at one end of the composite monofilament, there are a method of physically removing the sheath part using a file or the like, and a method of chemically dissolving and removing the acid part using an acid / alkali solution. In the present invention, dissolution and removal with an acid / alkali solution is preferable because the island can be easily exposed without damaging the island.

  Furthermore, in the polishing brush hair material of the present invention, as described above, the synthetic resin constituting the island part of the composite monofilament is polyamide because the island part can be easily exposed by the acid / alkaline solution. And the synthetic resin constituting the sea part is a polyester resin, or the synthetic resin constituting the island part of the composite monofilament is a polyester resin, and the synthetic resin constituting the sea part is a polyamide resin. Preferably, the polyamide resin constituting the island part of the composite monofilament is N610 and N612, and the polyester resin constituting the sea part is PBT, or the polyester resin constituting the island part of the composite monofilament Is PBT, and the polyamide resin constituting the sea is N610 More preferably beauty N612.

  In this case, it is particularly preferable that a polyester elastomer is contained in the polyester resin constituting the island part or the sea part of the composite monofilament because a breakage durability effect can be obtained.

  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 polishing brush bristle material of the present invention does not require any special production apparatus. For example, first, a composite monofilament having a sea-island structure is melt-spun using a known composite melt spinning machine. The obtained composite monofilament can be obtained by cutting it into a required length.

  Moreover, when exposing an island part to the end of a composite monofilament, it can obtain by immersing the end of the composite monofilament cut | disconnected to the required length in an acid or an alkali solution, and melt | dissolving and removing the sea part.

  The polishing brush bristle material of the present invention thus obtained is used for at least a part of polishing brushes such as disc roll brushes, channel roll brushes, cup-shaped brushes and foil brushes. In addition to the effect that there is no breakage of the hair material at the time of cleaning or polishing, the polishing performance without any regret is exhibited.

  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 composite monofilaments 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 rolling direction of the composite monofilament bundle while pressing with a load of 1 kg. Thereafter, the mass B of the composite 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 composite monofilament was repeatedly bent, and the number of reciprocating folds until the composite monofilament was cut was measured five times. The larger the average of these five measurements, the better the breakage durability.

[Abrasiveness]
Using the obtained composite 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.
○: The polished state of the uneven surface of the object to be polished is good.
Δ: 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]
Five islands contain 77% by weight of PBT resin (1500S manufactured by Toray Industries, Inc.) with an intrinsic viscosity of 1.5 and 0.2% by weight of silane coupling agent (SH6040 manufactured by Toray Dow Corning Silicone Co., Ltd.). % N210 resin with a relative viscosity of 3.8 in the sea part (M2041 manufactured by Toray Industries, Inc.). It was used.

  Each of these mixtures was supplied to two extruder-type composite spinning machines, melt-kneaded at a temperature of 260 ° C., and then extruded from the sea-island composite mouthpiece at the sea-island composite ratio shown in Table 1. Next, the extruded yarn was cooled and solidified in a cooling bath at 20 ° C., and then stretched 3.2 times in a hot air atmosphere at 180 ° C. to obtain a circular cross-sectional composite monofilament having a diameter of 0.6 mm.

  And the obtained composite monofilament was cut, and this was used for preparation of a cup-shaped brush as a brush hair material for polishing. Each evaluation result of the composite monofilament and the cup-shaped brush is also shown in Table 1.

[Example 2]
N610 resin (M2041 manufactured by Toray Industries, Inc.) having a relative viscosity of 3.8 is used for the five islands of Example 1, and PBT resin (500S manufactured by Toray Industries, Inc.) having an intrinsic viscosity of 1.5 is used for the sea. A circular cross-section composite monofilament having a diameter of 0.6 mm was obtained under the same conditions as in Example 1 except that it was used.

  And the obtained composite monofilament was cut, and this was used for preparation of a cup-shaped brush as a brush hair material for polishing. Each evaluation result of the composite monofilament and the cup-shaped brush is also shown in Table 1.

[Examples 3 and 4]
The composite monofilament obtained in Example 2 is bundled into a plurality of pieces and cut by winding a paper tape around the bundle, and then the cut end portion is immersed in an aqueous sodium hydroxide solution to dissolve and remove the sheath portion of the composite monofilament. Thus, as shown in Table 1, the lengths of the exposed portions of the core portions were obtained. And cup-shaped brush was produced using this brush brush material for grinding | polishing, and each evaluation was performed. The respective evaluation results are also shown in Table 1.

[Example 5]
The composite monofilament obtained under the same conditions as in Example 2 except that the number of islands in Example 2 is 10 is bundled into a plurality of pieces, and a paper tape is wound around the bundle and cut, and then the cut end portion Was immersed in an aqueous solution of sodium hydroxide to dissolve and remove the sheath part of the composite monofilament, whereby the brushed bristle material for polishing with different lengths of the exposed part of the core part as shown in Table 1 was obtained. And cup-shaped brush was produced using this brush brush material for grinding | polishing, and each evaluation was performed. The respective evaluation results are also shown in Table 1.

[Comparative Example 1]
Silicon carbide abrasive of particle size # 320 coated with 77% by weight of N610 resin used in the sea part in Example 1 and 0.2% by weight of silane coupling agent (SH6040 manufactured by Toray Dow Corning Silicone Co., Ltd.) A mixture of 23% by weight of particles (manufactured by Showa Denko KK) was supplied to an extruder-type spinning machine, melt-kneaded at a temperature of 260 ° C., and then extruded from a die hole. Next, the extruded yarn was cooled and solidified in a cooling bath at 20 ° C., and then stretched 3.2 times in a hot air atmosphere at 180 ° C. to obtain a circular cross-sectional monofilament having a diameter of 0.6 mm.

  And the obtained monofilament was cut, and this was used for preparation of a cup-shaped brush as a brush hair material for polishing. Each evaluation result of the monofilament and the cup-shaped brush is also shown in Table 1.

[Comparative Example 2]
A circular cross-sectional monofilament having a diameter of 0.6 mm was obtained under the same conditions as in Comparative Example 1 except that the N610 resin in Comparative Example 1 was changed to a PBT resin.

  And the obtained monofilament was cut, and this was used for preparation of a cup-shaped brush as a brush hair material for polishing. Each evaluation result of the monofilament and the cup-shaped brush is also shown in Table 1.

[Comparative Example 3]
Grain count # in which 0.2% by weight of silane coupling agent “SH6020 manufactured by Toray Dow Corning Silicone Co., Ltd.” is coated on nylon 610 resin “M2041 manufactured by Toray Industries, Inc.” having a relative viscosity of 3.8. 2 compositions each of 100 silicon carbide abrasive particles (made by Showa Denko KK) and 23% composition and polybutylene terephthalate resin (Toray Industries, Inc .: 1500S) having an intrinsic viscosity of 1.5 The melt was kneaded at a temperature of 260 ° C. and then extruded from the core-sheath composite mouthpiece at a core-sheath composite weight ratio shown in Table 1. The extruded composite yarn was cooled and solidified in a cooling bath at 20 ° C., and then stretched 3.2 times in a hot air atmosphere at 180 ° C. to obtain circular cross-section composite monofilaments each having a diameter of 0.6 mm. The obtained monofilament was used to evaluate the abrasive grain drop rate and breakage durability. Further, the polishing amount was evaluated by polishing the above-mentioned monofilament and processing a cup-shaped brush. The results are also shown in Table 1.

[Comparative Example 4]
The composite monofilament obtained in Comparative Example 3 is bundled into a plurality of pieces, cut with a paper tape wound around the bundle, and then the cut end portion is immersed in an aqueous sodium hydroxide solution to dissolve and remove the sheath portion of the composite monofilament. Thus, as shown in Table 1, the lengths of the exposed portions of the core portions were obtained. And cup-shaped brush was produced using this brush brush material for grinding | polishing, and each evaluation was performed. The respective evaluation results are also shown in Table 1.

[Comparative Example 5]
The same conditions as in Example 1 except that N610 resin (M2041 manufactured by Toray Industries, Inc.) having a relative viscosity of 3.8, which is the same synthetic resin as that of the sea part, was used for the five islands of Example 1. A 6 mm circular cross-section composite monofilament was obtained. Then, the obtained composite monofilament was cut, and a cup-shaped brush was produced using this as a brush bristle material for polishing, and each evaluation was performed. The respective evaluation results are also shown in Table 1.

  As is clear from the results in Table 1, the polishing brush hairs satisfying the conditions of the present invention (Examples 1 to 5) have no abrasive particles falling off, have excellent breakage durability, and have a continuous polishing performance. It can be seen that the hair material.

  Also, the polishing brush bristle material (Examples 3 to 4) of the present invention in which the island portion is exposed has very little loss of abrasive particles and is excellent in breakage durability. It can be seen that it has higher polishability than the brush bristle material.

  On the other hand, the abrasive brush bristle material that does not satisfy the conditions of the present invention does not sufficiently exhibit the above effects. For example, the conventional abrasive brush bristle material that does not form a composite structure (Comparative Examples 1 and 2) The abrasive brush bristles (Comparative Examples 3 and 4) having a double-core-sheath composite structure in which the abrasive particles are often dropped and lack breakage durability and the core portion contains abrasive particles are: Although the particles did not fall off, there were problems such as being unable to cope with the uneven surface of the object to be polished and some parts not being polished.

  In addition, the polishing brush bristle material (Comparative Example 5) in which the synthetic resin constituting the island part and the sea part is the same as each other is difficult to peel off the sheath part, so that the core part containing abrasive particles is not easily exposed, The polishing performance was not continuously exhibited as compared with the polishing brush bristle material of the example.

  The polishing brush bristle material of the present invention makes it difficult for abrasive particles to fall off from the polishing brush bristle material, and there is no breakage of the bristle material during deburring or polishing, and bending fatigue at the root of the planted bristle material It has excellent durability such as excellent durability and has a continuous polishing performance, resulting in defective deburring and polishing, especially on metal surfaces, and broken hair materials and dropped abrasive particles are attached. If applied to disk roll brushes, channel roll brushes, cup-shaped brushes, and foil brushes used for deburring and polishing of machine parts that are likely to cause product safety problems, these effects must be fully demonstrated. Can do.

Claims (6)

A brush bristle material for polishing composed of sea-island structure composite monofilament, wherein the island part of the composite monofilament is made of a mixture of synthetic resin and abrasive particles, and the sea part is made of another synthetic resin different from the synthetic resin of the island part A brush hair material for polishing characterized by comprising: The number of island parts of the said composite monofilament is 2 or more, The brush hair material for grinding | polishing of Claim 1 characterized by the above-mentioned. The island part is exposed without being covered with the sea part at least at one end of the composite monofilament, and the length of the exposed part of the core part is 1 to 10 mm. Brush hair material for polishing. The polishing according to any one of claims 1 to 3, wherein the synthetic resin constituting the island part of the composite monofilament is a polyamide resin, and the synthetic resin constituting the sea part is a polyester resin. Brush hair material. The polishing according to any one of claims 1 to 3, wherein the synthetic resin constituting the island part of the composite monofilament is a polyester resin, and the synthetic resin constituting the sea part is a polyamide resin. Brush hair material. A polishing brush comprising the polishing brush bristle material according to any one of claims 1 to 5 as at least a part of the bristle material.