JP2013063493A - Bristle material for polishing brush, and polishing brush - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bristle material for a polishing brush, which is excellent in hygrothermal resistance and polishing characteristics and exerts sustainable polishing performance, and to provide a polishing brush.SOLUTION: The bristle material for a polishing brush is formed of a monofilament produced by melt-spinning a resin composition that contains 5-50 pts.wt. of polishing abrasive particles based on 100 pts.wt. of a resin or resin composition containing, as the principal component, a polycyclohexanedimethylene terephthalate-based resin.

Description

  The present invention relates to a bristle material for an abrasive brush and an abrasive brush used for grinding metal or the like. More particularly, the present invention relates to a polishing brush bristle material and a polishing brush which have both excellent heat and heat resistance and polishing properties, and which exhibit continuous polishing performance even in a severe grinding environment of high temperature and high humidity as compared with the prior art.

  Conventionally, polishing brushes such as disk roll brushes, channel roll brushes, cup-shaped brushes, segment brushes, etc. have been used for polishing metal plate surfaces in the metal plate manufacturing process. Uses monofilaments containing abrasive particles.

  The properties of the bristle material required for the polishing brush include the waist of the bristle material, heat resistance, abrasiveness, wear resistance, etc. Brushes that satisfy these properties are used depending on the intended use. Yes.

  These polishing brushes are used to remove sludge and rust that are pressed against the surface of the metal plate while rotating, and are used in harsh grinding environments such as high temperature and humidity during use. There is a problem that the hair material deteriorates due to.

  As a means for improving such a problem, polishing comprising a monofilament obtained by melt spinning a resin composition containing 5 to 40% polishing abrasive particles and 0.3 to 5% by weight of a carbodiimide compound with respect to a polyester resin. Although a monofilament for brushes (see, for example, Patent Document 1) is known, this monofilament for polishing brushes has a feature that it is relatively excellent in moisture and heat resistance, which is a disadvantage of polyester resins, but is severely ground during use. In the environment, the hair material was rapidly deteriorated, and there was still a problem that sufficient abrasiveness could not be obtained.

  In view of the above, there has been a constant demand for the development of a bristle material for polishing brush and a polishing brush that have both excellent heat and moisture resistance and polishing properties and that exhibit continuous polishing performance.

JP 2004-122289 A

  The present invention has been achieved as a result of studying the solution of the problems in the prior art described above as an issue. Accordingly, an object of the present invention is to provide a polishing brush hair material and a polishing brush that have both excellent heat and moisture resistance and polishing properties, and that exhibit a continuous polishing performance in a high temperature and high humidity severe grinding environment. .

  In order to achieve the above object, according to the present invention, a resin containing 5 to 50 parts by weight of abrasive particles with respect to 100 parts by weight of a resin or resin composition containing a polycyclohexanedimethylene terephthalate resin as a main component. A bristle material for an abrasive brush comprising a monofilament obtained by melt spinning a composition is provided.

In the hair material for polishing brush of the present invention,
The count of the abrasive abrasive particles is # 36 to # 3000, and the yarn diameter of the monofilament is 0.1 to 4.0 mm.
Are mentioned as preferable conditions.

  Moreover, the bristle material for abrasive brushes of the present invention is characterized by using the bristle material for abrasive brushes as at least a part of the bristle material.

  ADVANTAGE OF THE INVENTION According to this invention, the bristle material and polishing brush for abrasive brushes which have the outstanding heat-and-moisture resistance and abrasiveness are obtained. Therefore, the bristle material for a polishing brush of the present invention is extremely useful for a polishing brush for polishing processing that requires a severe grinding environment such as high temperature and high humidity.

  Hereinafter, the present invention will be specifically described.

  The bristle material for an abrasive brush of the present invention comprises a resin composition containing 5 to 50 parts by weight of abrasive abrasive particles with respect to 100 parts by weight of a resin or resin composition containing a polycyclohexanedimethylene terephthalate resin as a main component. It consists of a monofilament melt-spun.

  The polycyclohexane dimethylene terephthalate resin used in the present invention has a repeating unit in which a terephthalic acid residue and a 1,4-cyclohexane dimethanol residue are bonded as a main constituent, preferably the repeating unit. The unit occupies 80 mol% or more of the polymer.

  Further, the acid component or diol component of the polycyclohexanedimethylene terephthalate resin is usually within a range of 20 mol% or less, isophthalic acid, orthophthalic acid, 2,6-naphthalenedicarboxylic acid, 2,7-naphthalenedicarboxylic acid, 1,5 -Naphthalenedicarboxylic acid, methyl terephthalic acid, 4,4'-biphenyldicarboxylic acid, 2,2'-biphenyldicarboxylic acid, 1,2-bis (4-carboxyphenoxy) -ethane, succinic acid, adipic acid, suberic acid, Other dicarboxylic acids such as azelaic acid, sebacic acid, dodecanedioic acid, octadecanedicarboxylic acid, dimer acid and 1,4-cyclohexanedicarboxylic acid or ethylene glycol, propylene glycol, 1,5-pentanediol, 1,6-hexanediol 1,8-octane Those substituted with other diols such as all, 1,10-decanediol, 1,3-cyclohexanedimethanol, 1,2-cyclohexanedimethanol and 2,2-bis (2'-hydroxyethoxyphenyl) propane are also used. Among these, a copolymer obtained by substituting a part of the acid component with isophthalic acid is particularly preferably used from the viewpoint of moisture and heat resistance.

  The polycyclohexanedimethylene terephthalate-based resin may be a single resin, but in some cases, other compatible thermoplastic resins are mixed and used within a range that does not impair the object of the present invention. It is also possible. The other compatible thermoplastic resin herein is not particularly limited, but is not limited to polyethylene terephthalate, polybutylene terephthalate, polypropylene terephthalate, polyethylene naphthalate, polymethylene naphthalate, polybutylene naphthalate, polypropylene naphthalate, or the like. Polyester resins other than cyclohexanedimethylene terephthalate resin, polyamides such as nylon 6, nylon 66, nylon 610, nylon 612, nylon 510, nylon 1010, nylon 1012, nylon 1212, nylon 46, nylon MXD6, nylon 11 and nylon 12 Resin, polytetrafluoroethylene, perfluoroethylene / propylene copolymer, ethylenetetrafluoroethylene copolymer, polychlorotriethylene Fluoroethylene copolymer, tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer, tetrafluoroethylene / perfluorodioxole copolymer, tetrafluoroethylene / hexafluoropropylene copolymer, tetrafluoroethylene / hexafluoropropylene / vinylidene Examples thereof include fluorine resins such as a fluoride copolymer tetrafluoroethylene / ethylene chloride copolymer and a fluorovinyl ether copolymer. However, when the blending amount of these other compatible thermoplastic resins is large, the abrasiveness and the strength of the hair material are reduced, so the blending amount of the other compatible thermoplastic resin is The amount is preferably 50 parts by weight or less, more preferably 30 parts by weight or less, based on 100 parts by weight of the cyclohexanedimethylene terephthalate resin.

  Among these compatible resins, polyethylene terephthalate, polybutylene terephthalate, polypropylene terephthalate, polyethylene naphthalate, polybutylene naphthalate are used because of their excellent durability and abrasiveness as a hair material for polishing brushes. The use of polyester resins other than polycyclohexanedimethylene terephthalate resins such as polypropylene naphthalate is particularly preferred.

  As polishing abrasive particles to be included in the bristle material for polishing brush of the present invention, silicon carbide, green silicon carbide, alumina oxide, artificial diamond, and the like can be used. , Preferably in the range of # 36 to # 3000, and more preferably in the range of # 60 to # 1500.

  When the content of the abrasive abrasive particles is large, the strength of the bristle material for polishing brushes tends to decrease, so that the resin or resin composition containing polycyclohexanedimethylene terephthalate resin as a main component is 100 weight. The amount is preferably in the range of 5 to 50 parts by weight, and more preferably in the range of 10 to 30 parts by weight.

  Moreover, the diameter of the bristle material for polishing brushes of the present invention is preferably in the range of 0.1 to 4.0 mm, more preferably in the range of 0.3 to 3.0 mm, from the standpoint of polishing. More preferred.

  It is not necessary to use any special manufacturing apparatus for manufacturing the bristle material for the polishing brush of the present invention. For example, it can be manufactured using a known extruder type melt spinning machine.

  Specifically, polycyclohexanedimethylene terephthalate resin or resin composition and abrasive particles are supplied to a twin-screw extrusion melt spinning machine, and the melt-kneaded mixture is extruded from a spinneret, cooled, solidified, and heated and stretched. In response to the heat relaxation treatment, the monofilament is once wound up into a bundle. Next, the hair material for polishing brushes of the present invention is obtained by cutting the length according to the use of the polishing 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 the bristle material for polishing brush obtained by the above production method into at least a part of the brush base material, and is obtained by a known production method.

  As described above, according to the present invention, a bristle material for an abrasive brush having both excellent heat and heat resistance and abrasiveness can be obtained, and this bristle material for an abrasive brush can be used as a roll brush, a cup brush, a cylindrical brush, and a foil brush. When used as at least a part of the bristle, the polishing brush is extremely useful as a polishing brush for polishing processing that requires the above-mentioned characteristics.

  EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated further in detail, this invention is not limited to a following example at all unless the summary is exceeded. In addition, evaluation of the abrasiveness, heat resistance, and abrasion resistance of the hair materials in the following examples and comparative examples was performed as follows.

[Moisture and heat resistance evaluation]
The obtained monofilament is put into a 100 liter autoclave and continuously treated with saturated steam at 121 ° C. for 12 days, and then the tensile strength of the monofilament after treatment and untreated (pre-treatment) monofilament is described in JIS L 1095 Tensile strength was measured with, the strength retention rate of the monofilament before and after the treatment was calculated, and was used as a measure of moisture and heat resistance. The formula was: strength retention (%) = (strength of monofilament after treatment ÷ strength of monofilament before treatment) × 100. The tensile strength of the monofilament that had not been treated was set to 100%, and the strength retention of the treated monofilament was calculated as a percentage. It shows that it is excellent in heat-and-moisture resistance, so that a ratio is high.
A: The strength retention is 90% or more (very good heat and humidity resistance was obtained),
B: The strength retention was 70% to 90% (good wet heat resistance was obtained),
C: Strong retention rate of 50% to 70% (slightly wet heat resistance),
D: Strong retention rate is 50% or less (wet heat and heat resistance is poor).

[Abrasiveness evaluation]
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 50 mm was prepared. Then, this cup-shaped brush was attached to a hand grinder, and as a preliminary polishing, the surface of the stainless metal plate was polished for 6 hours under a wet condition under a pressure of 50 N and a rotation speed of 12000 rpm. Thereafter, as the main polishing, the stainless steel metal plate was replaced with a new one and polished for 30 minutes under the same conditions. In this main polishing, the mass of the stainless steel plate after polishing was calculated by subtracting the mass of the stainless metal plate after polishing from the mass of the stainless metal plate before polishing, and the criterion was as follows. It shows that it is excellent in the continuous grinding | polishing performance of a hair material, so that the mass of the scraped stainless steel powder is large.
A: The mass of the scraped stainless steel powder is 40 g or more (excellent in polishing performance),
B: The mass of the scraped stainless steel powder is 31 to 40 g (excellent in polishing),
C: The mass of the scraped stainless steel powder is 21 to 30 g (inferior in polishing properties),
D: The mass of the scraped stainless steel powder is 20 g or less (very inferior in polishing performance).

[Example 1]
A resin composition containing 100 parts by weight of a polycyclohexanedimethylene terephthalate resin and 10 parts by weight of silicon carbide abrasive particles having an abrasive grain size of # 100 is supplied to an extruder melt spinning machine and melted at a temperature of 280 ° C. After kneading, it was extruded from the die hole. Next, the extruded yarn was cooled and solidified in a cooling bath at 50 ° C., and then stretched 4.0 times in a hot air atmosphere at 120 ° C. to obtain a circular cross-sectional monofilament having a diameter of 0.5 mm. Each evaluation result is shown in Table 1.

[Example 2]
In Example 1, a monofilament was obtained under the same conditions as in Example 1 except that the abrasive grain content was changed to 20 parts by weight and the yarn diameter was changed to 1.0 mm. Each evaluation result is shown in Table 1.

[Example 3]
In Example 1, a monofilament was obtained under the same conditions as in Example 1 except that the abrasive grain size count was changed to # 500. Each evaluation result is shown in Table 1.

[Example 4]
In Example 2, the same conditions as in Example 2 except that the polycyclohexanedimethylene terephthalate resin was changed to a resin composition consisting of 90 parts by weight of polycyclohexanedimethylene terephthalate resin and 10 parts by weight of polyethylene terephthalate resin. A monofilament was obtained. Each evaluation result is shown in Table 1.

[Example 5]
Example 3 is the same as Example 3 except that the polycyclohexanedimethylene terephthalate resin is changed to a resin composition comprising 80 parts by weight of polycyclohexanedimethylene terephthalate resin and 20 parts by weight of polyethylene naphthalate resin. Monofilaments were obtained under the conditions. Each evaluation result is shown in Table 1.

[Comparative Example 1]
In Example 2, a monofilament was obtained under the same conditions as in Example 2 except that the polycyclohexanedimethylene terephthalate resin was changed to a polyethylene terephthalate resin. Each evaluation result is shown in Table 1.

[Comparative Example 2]
Example 2 is the same as Example 2 except that the polycyclohexanedimethylene terephthalate resin is changed to a polybutylene terephthalate resin, the melt spinning temperature is 260 ° C., and the abrasive content is 3 parts by weight. Monofilaments were obtained under the conditions. Each evaluation result is shown in Table 1.

[Comparative Example 3]
In Example 2, a monofilament was obtained under the same conditions as in Example 2 except that the polycyclohexanedimethylene terephthalate resin was changed to a resin containing 1 part by weight of a carbodiimide compound in 100 parts by weight of a polybutylene terephthalate resin. . Each evaluation result is shown in Table 1.

[Comparative Example 4]
In Example 2, a monofilament was obtained under the same conditions as in Example 2 except that the abrasive grain content was changed to 60 parts by weight. Each evaluation result is shown in Table 1.

  As is clear from the results in Table 1, it can be seen that the bristle material for polishing brush (Examples 1 to 5) satisfying the conditions of the present invention is a bristle material excellent in wet heat resistance and abrasiveness.

  Since the bristle material for abrasive brushes of the present invention is excellent in heat and moisture resistance and abrasiveness, abrasive brushes such as roll brushes, cup brushes, cylindrical brushes and foil brushes using this as at least a part of the bristle material, It is extremely useful for polishing processing applications that require high heat and humidity resistance.

Claims (4)

It is characterized by comprising a monofilament obtained by melt-spinning a resin composition containing 5 to 50 parts by weight of abrasive abrasive particles with respect to 100 parts by weight of a resin or resin composition containing a polycyclohexanedimethylene terephthalate resin as a main component. Brush material for polishing brush. The bristle material for an abrasive brush according to claim 1, wherein the abrasive abrasive particles have a count of # 36 to # 3000. The bristle material for an abrasive brush according to claim 1 or 2, wherein the monofilament has a yarn diameter of 0.1 to 4.0 mm. A polishing brush comprising the bristle material for an abrasive brush according to any one of claims 1 to 3 as at least a part of the bristle material.