JPH1057145A - Bristle material for brush - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bristle material for brushes which is extremely good in a washing property and shape stability without flawing the surfaces to be washed in washing of the bodies of automobiles, appliances and articles. SOLUTION: This bristle material for brushes is a long-sized planar bristle material which has waves 1 in a transverse direction and is formed with finely split fibers 6a at the front end in a longitudinal direction. The compsn. of the bristle material consists of a resin compsn. prepd. by compounding 0.5 to 40 pts.wt. ethylene-αolefin copolymer thermoplastic elastomer or styreneethylene- block copolymer thermoplastic elastomer and 60 to 99.5 pts.-wt. at least one kind among low-density polyethylene, high-density polyethylene and straight chain low-density polyethylene.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile body,
The present invention relates to a brush bristle material suitable for cleaning instrument articles and the like.

[0002]

2. Description of the Related Art Conventionally, as a bristle material for a brush, monofilaments having irregular cross sections having various shapes have been used in many cases. In particular, in the case of cleaning an automobile body, the tip of a monofilament having a modified cross section has been used as a bristle material by subdividing the tip of the monofilament in a longitudinal direction in order to reduce damage to the body surface. However, with the recent increase in the speed of car washing, there is a demand for minimizing damage to the surface of the car body and increasing the washing power. In order to respond to this demand, the shape of the subdivision of the bristle material that first comes into contact with the vehicle body and exerts a cleaning effect without damaging the body surface is an important factor.

Conventionally, monofilaments of irregular cross section which have been used for hair materials are triangular, pentagonal, etc. It has a main body and has a plurality of protruding sides extending radially from the main body, as proposed in 1-239107 and Japanese Utility Model Publication No. 5-42742. If this is subdivided in the longitudinal direction under certain conditions, for example,

FIG. 2 (A) shows a cross section shown in FIG.

FIG. 2 shows a state shown in FIG. That is, the fiber 9 becomes the thick fiber 9 around the main trunk and the thin fiber 9a in the state of being stuck. The cross section and the direction of the stranded fibers 9a are completely irregular. When the car is washed at a high speed using the bristle material having the subdivided portion 8 in this state, the thick fiber 9 centered on the main trunk 7 strongly hits the body surface of the car, and the thin fiber 9a in the broken state becomes , Hardly hit. As a result, uniform cleaning cannot be performed. In addition, the thick fiber 9 centered on the main trunk is poor in flexibility and will damage the automobile body.

As recently disclosed in Japanese Patent Application Laid-Open No. 1-278572,

FIG. 3 shows a brush-like bristle material in which a plurality of gutter-like water retention grooves extending in the longitudinal direction are formed on the surface of the belt-like brush material shown in FIG. 3 and the leading end portion is finely divided in the longitudinal direction. Also in this case, since the cross section has an uneven thickness in the width direction, the finely divided state is a mixed state of thick fibers and thin fibers, like the cross shape. Therefore, as in the case of the cross shape, good results cannot be expected for the cleaning performance.

Japanese Utility Model Laid-Open No. 1-97731, Japanese Utility Model Laid-Open No. 3-118
35, JP-A-6-22815, using a thermoplastic elastomer as a bristle material for a brush;
No. 4, there is a report that a polyester elastomer is used for industrial materials. Thermoplastic elastomers are
It is sticky and has poor dimensional stability to heat as compared to thermoplastic resins. In particular, monofilaments having adhesiveness have poor subdivision workability and cannot be used as a bristle material for brushes. The monofilament molded from the thermoplastic elastomer 100% or the thermoplastic elastomer as a sheath component and a thermoplastic resin into a core-sheath configuration as a core component in the above-mentioned Japanese Utility Model Application and Unexamined Publication Hei-Hei. All of them are unsuitable as a car wash brush bristle material because of poor dimensional stability of the brush. As described above, the bristle material obtained by subdividing the monofilament with the irregular cross section in the longitudinal direction, which is currently used, is insufficient, and no suitable bristle material for a brush has been made using a thermoplastic elastomer.

[0006]

DISCLOSURE OF THE INVENTION The present invention relates to a brush bristle having excellent cleanability and excellent shape stability without damaging a surface to be cleaned in cleaning an automobile body or a tool article. The purpose is to provide materials.

[0007]

Means for Solving the Problems The inventors of the present invention have made intensive studies to achieve the above-mentioned object, and as a result, have found that the above-described object can be achieved by the invention described below. The present invention provides: (1) a bristle material in the form of a long plate, wherein the bristle material has undulations 1 in the width direction and has finely divided bristles 6a formed at the end in the longitudinal direction. Wood. (2) 0 to 5 to 40 parts by weight of an ethylene-α-olefin copolymer thermoplastic elastomer or a styrene / ethylene block copolymer thermoplastic elastomer and at least one of low-density polyethylene, high-density polyethylene, and linear low-density polyethylene The brush bristle according to the above (1), comprising a resin composition containing 60 to 99 seeds and 5 parts by weight.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

FIG. 1A is a cross-sectional view of a bristle material of the present invention. When the swell 1 is stretched, it becomes a quadrilateral, and the end face 2 where the swell starts and the end face 3 where the swell ends preferably enter the height h of the swell. Also undulation pitch L
Are desirably connected at least 1, 5 or more. The undulations 1 are wavy, and the valleys 4 of the undulations are water retention grooves. Since the flow of the washing water is undulated and undulated, it is easy to get over in the width direction. Therefore, a uniform washing liquid layer is formed at the contact interface between the automobile body and the hair material.
Therefore, an excellent cleaning effect can be expected.

[0009]

FIG. 1B shows the tip of the bristle material 1 for a brush of the present invention. The subdivision 6 of the bristle material is composed of fibers having substantially the same cross section and thickness. The length la of the finely divided portion constituting fibers is also constant, and the directions of the finely divided portion constituting fibers 6a are also uniform. The reason why the finely divided fibers 6a are uniformly arranged in this manner is that the thickness of the cross section forming the undulation in one bristle material of the present invention is almost constant, and thus the division length of the finely divided blade in the finely divided processing machine is reduced. This is because they are almost the same, and as a result, the dividing pressure of the subdivided blade is uniformly applied in the width direction of the transverse section.

The resin composition of the bristle material 5 using the thermoplastic elastomer of the present invention is as low as 0 to 5 to 40 parts by weight of an ethylene-α-olefin copolymer thermoplastic elastomer or a styrene / ethylene block copolymer thermoplastic elastomer. At least one of high-density polyethylene, high-density polyethylene, and linear low-density polyethylene is blended in an amount of 60 to 99 and 5 parts by weight.

Further, 0 to 2 to 5 parts by weight of a lubricant and 0 to 2 to 0 and 8 parts by weight of an ultraviolet absorber may be added to 100 parts by weight of the compound. Further, a coloring agent such as an inorganic pigment may be added.

This compound is prepared by a melt extrusion molding method.

FIG. 1A shows a filament having a cross section of the present invention shown in FIG. 1A, which was molded and finely divided in a longitudinal direction. Subdivision situation

FIG. 1 (B) shows a finely divided portion 6 composed of fibers 6a having substantially the same cross-sectional shape and thickness, and having a constant finely divided length la. . Also, as a result of assembling the bristle material into a brush for car washing, assembling it into an automobile car washing machine and performing car washing at a high speed, the length la of the subdivision does not increase, and the constituent fibers 6a of the subdivision 6 are damaged. There was a remarkable feature that was rarely seen. Further, the hair material had excellent dimensional stability against heat, was soft, elastic, colored and sharp. this is,
Ethylene-α olefin copolymer thermoplastic elastomer, or styrene-ethylene block copolymer thermoplastic elastomer, micro-dispersed in low density polyethylene, high density polyethylene or linear low density polyethylene very uniformly, stable Under suitable conditions to take the structure. Therefore, in a monofilament in which an ethylene-α-olefin copolymer thermoplastic elastomer is blended in an amount of 40 parts by weight or more of low-density polyethylene, adhesiveness is gradually developed. Can not be done. Also, stable monofilaments cannot be formed by extrusion molding. If the amount is less than 0 or 5 parts by weight, it does not contribute to the improvement of the stability of the finely divided portion 6 of the bristle material after the high-speed car washing described above.

Although the stability of the subdivision 6 of the bristle material after the car washing at a high speed is slightly reduced, conventional thermoplastic resins, ie, low density polyethylene, high density polyethylene, linear low density polyethylene, polypropylene, Polyester, nylon 6, and nylon 66 may be used.

Further, the thickness of the hair material of the present invention is desirably 1000 denier or more, preferably between 3000 and 8000 denier.

Next, test examples will be described. The determination of the subdivision state of the bristle material subdivisions 6 and 8, the dimensional stability of the bristle to heat, the degree of damage to the object to be cleaned, and the stability of the bristle shape were determined by the following experimental methods. The test contents are as follows
Shown in Determination of the subdivision status of the hair subdivision units 6 and 8. 4000 denier, 80cm long filament 2
000-springs, split blade 6000 revolutions /
At a rotation speed of 1 minute, the tip of the filament was subdivided in the longitudinal direction to obtain a bristle material. The state of subdivision of the bristle material was determined based on the following criteria. ；: The cross-sectional shape and thickness of the fibers finely divided from the bristle material are substantially uniform, the direction in which the fibers are divided, and the division length are constant. Δ: The cross-sectional shape and thickness of the fiber finely divided from the hair material are not uniform, but the direction in which the fiber is divided and the division length are constant. ×: Among the fibers finely divided from the hair material, one or two fibers are remarkably thick, and the other fibers are in a broken state.
The split direction and split length of the fiber are completely irregular. Dimensional stability of hair to heat. The bristle material obtained above was taken 50 cm from the end of the subdivision, left in a dryer at 70 ° C. for 24 hours, and taken out. The dimensional stability of the bristle material was determined according to the following criteria. ；: The shrinkage rate is 1% or less, and there is no change in the shape of the entire bristle material and the split part of the bristle material. Δ: The shrinkage ratio is 1% to 3%, a slight curl is generated in the entire bristle material, and the fibers constituting the leading part of the bristle material are shrunk. X: Shrinkage rate of 3% or more, significant curl of the entire bristle material, severe shrinkage of the fibers constituting the leading part of the bristle material, or a curled state. Degree of damage to the object to be cleaned. On a mini roll having a diameter of 10 cm and a length of 20 cm, take the bristle material obtained above 10 cm in length from the end of the subdivision,
The hair was uniformly implanted so that the subdivided portion of 200 bristle materials was directed outward with respect to the roll surface of the mini-roll to prepare a mini-roll brush. This mini-roll brush is pressed against a polymethyl methacrylate plate with a load of 1 kg, and 600 rotations /
Rubbing was performed for 1 minute for 5 hours, and the degree of damage of the polymethyl methacrylate plate surface was examined. And it was judged based on the following criteria. Rank A: No scratch at all. Rank B: Scars are observed, but shallow and few. Rank C: A scar is clearly recognized. Hair material shape stability. From the mini-roll brush after the above measurement, 100 hair materials were taken out and compared with the hair material before the measurement. The comparison was made at the following two points. A) Progress of subdivision; measurement of lengths of la and lb. B) The condition of the fibers constituting the finely divided portion. Observation of dropping and deformation of 6a, 9, 9a. From this comparison result, the stability of the bristle material shape was determined based on the following criteria. ；: Subdivision hardly progresses. That is, the lengths of la and lb hardly changed before and after the above three measurements, and 6a,
Almost no drop of 9, 9a is seen. Δ: Subdivision proceeds. That is, the lengths of la and lb are about three times the length before the measurement, and 6a, 9, 9
a was slightly dropped. ×: Subdivision greatly progressed. That is, the lengths of la and lb became large, and the dropouts of 6a, 9 and 9a were remarkable.

Example 1 A low-density polyethylene resin having a density of 0,910 and a melt index of 2,0 was applied to a monofilament spinning machine having an L / D = 2, 4, a compression ratio of 3, and a screw diameter of 50 mm in a plate shape of the present invention. The resin was extruded at a resin temperature of 200 ° C. from a spinneret having 10 holes for forming a monofilament having a cross section composed of four undulations in a width direction of 2 mm at a resin temperature of 200 ° C., and then guided to a stretching tank containing 90 ° C. After stretching twice, it was set in hot water at 90 ° C., and the resulting monofilament was wound up. The thickness of the monofilament was 4000 denier. This filament was finely divided in the longitudinal direction of the bristle material as a car wash brush, and this was designated as Example 1. The determination of the subdivisions of the subdivisions 6a, 9, 9a in the first embodiment, the dimensional stability of the hair material against heat, the degree of damage to the object to be cleaned,
The stability of the bristle shape was examined. The result of the examination

The results are shown in Table 1.

EXAMPLE 2 A linear low-density polyethylene resin having a density of 0,920 and a melt flow rate of 2,1 was applied to a monofilament spinning machine having a L / D = 2, a compression ratio of 3, and a screw diameter of 5 mm. Extruded at a resin temperature of 200 ° C from a spout provided with 10 holes for forming a monofilament having a cross section composed of six undulations in the width direction of 2 mm in a width direction of 2 mm, cooled with water, and then guided to a stretching tank containing 90 ° C. After stretching to 4 times or 2 times, it was set in hot water at 90 ° C., and the resulting monofilament was wound up. The thickness of the monofilament was 4000 denier. The monofilament was finely divided in the longitudinal direction of the bristle material as a brush for car washing, and this was designated as Example 2. The same contents as in Example 1 were checked, and the checked result was

The results are shown in Table 1.

EXAMPLE 3 70 parts by weight of a low-density polyethylene resin having a density of 0,910 and a melt index of 2,0 and 30 parts by weight of an ethylene-α-olefin copolymer elastomer having a density of 0,880 and a melt flow rate of 1,4 were tumbled. Blended in a formula blender. L / D = 2, 4 Compression ratio 3, 0 Screw diameter 5
At a resin temperature of 200 ° C, a 0 mm monofilament spinning machine is extruded at a resin temperature of 200 ° C from a spout provided with 10 holes for forming a monofilament having a cross section composed of four undulations in a width direction of 2 mm in a plate shape of the present invention in a width of 2 mm. The drawn monofilament was drawn into a stretching tank containing 90 ° C., stretched four to six times, set in hot water at 90 ° C., and the resulting monofilament was wound. The thickness of the monofilament was 4000 denier. This filament was finely divided in the longitudinal direction of the bristle material as a brush for car washing, and this was designated as Example 3. The same contents as in Example 1 were checked, and the checked result was

The results are shown in Table 1. Example 4 90 parts by weight of a linear low-density polyethylene resin having a density of 0,920 and a melt flow rate of 2, 1 and a density of 0,910,
10 parts by weight of a styrene-ethylene-block copolymer elastomer having a melt flow rate of 5 or 6 were blended by a tumbler blender. L / D = 2,4 Compression ratio 3,0
In a monofilament spinning machine with a screw diameter of 50 mm,
A resin temperature of 20 was obtained from a spinneret having the same 10 holes as in Example 2.
It was extruded at 0 ° C., cooled with water, guided to a stretching tank containing 90 ° C., stretched four to six times, set in hot water at 90 ° C., and wound the resulting monofilament. The thickness of the monofilament was 4000 denier. Further, this filament was finely divided in the longitudinal direction of the bristle material as a brush for car washing, and the same contents as in Example 1 were examined.

The results are shown in Table 1.

The same judgment as in Example 1 was made using the following bristle material as a comparative example. The subdivision processing conditions in the comparative example were the same as those in the example. Comparative Example 1 A bristle having a + -shaped cross section obtained by a spinning machine having a + -shaped hole attached to a spinneret under the same conditions as in Example 1 except for the above. Comparative Example 2;

FIG. 3 shows a spinning machine attached to a hole spinneret for forming a yarn having a cross section shown in FIG.

FIG. 3 is a bristle material having a cross section of FIG. Comparative Example 3 A hair material obtained by using a blended structure comprising 30 parts by weight of a low-density polyethylene resin and 70 parts by weight of an ethylene-α-olefin copolymer thermoplastic elastomer under the same conditions as in Example 3 except for the above. Comparative Example 4 Hair obtained under the same conditions as in Example 4 except that a blended structure consisting of 99, 8 parts by weight of a linear low-density polyethylene resin and 0, 2 parts by weight of a styrene-ethylene-block copolymer elastomer was used. Wood.

[0020]

[Table 1]

[0021]

From the results shown in Table 1, the cross section of the present invention is shown.

FIG. 1 shows that the bristle material having (A) has a characteristic that damage to an object to be cleaned is extremely small. The bristle material having the thermoplastic elastomer composition of the present invention and having the cross section of the present invention can be uniformly subdivided and has the same dimensional stability to heat as the conventional bristle material (Comparative Example 1). The fibers 6a constituting the subdivision are not damaged and the subdivision length la
The hair material was excellent in elasticity and flexibility, with very little progress. Further, the color clarity was excellent. Also, when the hair material of the present invention was assembled into a car wash brush, incorporated into an automobile car wash machine, and the car was washed at a high speed,
It turned out to have excellent cleaning power.

[0022]

As described above, in the bristle material for a brush according to the present invention, the fibers constituting the finely divided portion have a uniform shape and thickness, are hard to be broken, and are further difficult to be broken. Has the property that the length does not increase. Accordingly, the surface to be cleaned can be uniformly and flexibly contacted, and the cleaning surface can exhibit excellent sustained and excellent cleaning performance without damaging the surface. This property can be widely used for bristle materials such as car wash brushes, body brushes, and clothing brushes.

[Brief description of the drawings]

FIG. 1A is a cross-sectional view showing a bristle material for a brush of the present invention. (B) is a perspective view showing the tip of the bristle material for a brush of the present invention.

FIG. 2 is a cross-sectional view of a conventional example of a + -shaped monofilament cross section. (A) is a cross-sectional view showing the bristle material for a brush of the conventional invention. (B) is a perspective view showing a tip portion of the bristle material for a brush of the conventional invention.

FIG. 3 is a cross-sectional view of a conventional monofilament having several rows of gutter-shaped water retention grooves.

[Explanation of symbols]

 Reference Signs List 1 undulation 2 end surface where undulation starts 3 end surface where undulation ends 4 valley of undulation 5 bristle material of the present invention 6, 8 subdivided portion 6a, fiber constituting subdivided portion 7 main trunk 7a tip end portion of main trunk 9a Fiber 10 Water retention groove h Height of undulations la, lb Length of fiber constituting subdivided portion

Claims (2)

[Claims] 1. A bristle material for a brush, which is a long plate-shaped bristle material, which has a undulation 1 in a width direction and has finely divided fibers 6a formed at a tip end in a longitudinal direction. 2. An ethylene-α-olefin copolymer thermoplastic elastomer or 0.5 to 40 parts by weight of a styrene / ethylene block copolymer thermoplastic elastomer and low-density polyethylene, high-density polyethylene, or linear low-density polyethylene. The bristle material for a brush according to claim 1, comprising a resin composition containing at least one of 60 to 99.5 parts by weight.