JP5103599B2 - Brush hair and brush - Google Patents

Description

  The present invention has both a clearance cleaning function for removing dirt attached to a narrow space and a surface cleaning function for powerfully scraping off dirt attached to the surface. The present invention relates to a brush using a hair material.

  Conventionally, synthetic resin monofilaments have been used for brush bristle materials because they are inexpensive and can be easily processed.

  Particularly in recent years, various functions have been required for brushes, and hair materials used for brushes have been proposed having various forms and functions.

  For example, a toothbrush bristle material with a tapered tip (for example, see Patent Document 1) is easy to remove plaque in a narrow portion because the hair tip easily enters between teeth, and also has excellent tactile properties. In other words, it exhibits a specific function not found in conventional toothbrush bristle materials, such as a massage effect on gums.

  However, the bristle material for brushes having a tapered tip has not been sufficiently capable of scraping off the dirt on the surface of the object to be cleaned due to the soft bristles.

  The brush bristle material that does not taper the tip part has sufficient fluff at the tip part compared to the brushed brush hair material that is tapered, so it has a strong power to scrape off the surface of the object to be cleaned. Since the tip portion is not easily inserted into the narrow portion, not only the dirt in the narrow portion can be removed, but also the tactile sensation is not as good as that of the brushed brush material.

  Therefore, a brush bristle material with a taper at one end is bent at the middle to plant the hair, or a taper brush hair material and a non-tapered brush hair material are mixed and planted. Brushes that have both functions of cleaning and surface cleaning, and that are excellent in tactile sensation, have already been commercialized. In these brushes, brush hair that can be implanted in the flock holes of the brush There is a limit to the number of brushes, and if the diameter of the brush bristle material is reduced to increase the number of flocks, the bristles of the brush will weaken, making it difficult to obtain two cleanability-improving effects. It is actually difficult to increase the number of flocked hair because it changes the size of the brush itself, and even if the flock hole is enlarged, the brush hair can be flocked to a fixed size brush. The total number was there is a problem that does not change substantially of.

In this way, the conventional brushed brush material and the non-tapered brush hair material have a clearance cleaning function and a surface cleaning function, respectively, but when used individually or in combination with a brush. Since the two cleaning functions are not synergistically exhibited, in the current brush-related industry where superior functions are required, the development of brush hair materials that effectively perform these two cleaning functions It was always sought after.
Japanese Patent No. 3145213

  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 present invention has both a clearance cleaning function for removing dirt attached to a narrow space when used in a brush and a surface cleaning function for strongly removing dirt attached to the surface, and a brush excellent in tactile sensation. It is intended to provide a hair material and a brush using the brush hair material.

To achieve the above object, according to the present invention, a synthetic resin monofilament having a cross-sectional shape in which one or a plurality of sub-cross-section elements having the same shape or different shape from the main cross-section element are connected on the circumference of at least one main cross-section element. The cut bristle is formed by dividing the main cross-sectional element and the sub-cross-sectional element at least at one end thereof, and a straight portion that maintains the shape of the synthetic resin monofilament. and having a branched bristle portion, the branch bristles brush bristles, characterized in that the non-tapered bristles formed of tapered bristles and a polyester resin other than the synthetic resin made of a polyester resin are mixed in the Provided.

  Further, the brush of the present invention, particularly the toothbrush, is characterized by using the brush bristle material as at least a part of the bristle material, and is excellent in the gap cleaning function and the surface cleaning function, and also in the tactile sensation. Is.

  According to the present invention, as described below, it has a synergistic combination of a gap cleaning function for removing dirt attached to a narrow space and a surface cleaning function for strongly removing dirt attached to the surface, and is excellent in tactile sensation. Brush material and brush are obtained.

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

  FIG. 1 (a) is a cross-sectional view of the tip showing an example of the bristle material for a brush of the present invention, wherein 1 is a bristle material for a brush, 2 is a straight portion, 3 is a branched hair portion, 6 is a taper hair, and 7 is a non- Shows tapered hair. Similarly, FIGS. 1B and 1C show cross sections of the branched hair portion 3 (BB ′) and the straight portion (AA ′) of the bristle material 1 for brush of FIG. The main cross-sectional element, 5 is a sub-cross-section element, 6 is a tapered hair, and 7 is a non-tapered hair.

  That is, the bristle material 1 for brushes shown in FIG. 1 has three sub-section elements 5 that are the same shape or different shape from the main section elements 4 on the circumference of one main section element 4 as shown in FIG. A bristle material for a brush composed of a synthetic resin monofilament cut bristle having a plurality of connected cross-sectional shapes, wherein the cut bristle has a straight portion 2 and a branched hair portion 3 at least at one end thereof. Is characterized in that tapered hair 6 and non-tapered hair 7 are mixed.

  Therefore, since the bristle material 1 for brushes of this invention has the taper hair 6 which has a clearance cleaning function in the at least one end of one brush bristle material, and the non-taper hair 7 which has a surface cleaning property function, it is for this brush. When the bristle material 1 is used for a brush, it has an excellent gap cleaning function and surface cleansing function that are not found in conventional brushed brushed or non-tapered brushed hairs. And provides excellent tactile sensation.

  In addition, when using conventional brushed brush material or non-tapered brush hair material, brush hair material with tapered taper on one flocking hole or non-tapered brush material It is difficult to mix hair materials, and only brush hair material with a taper applied to one flock hole is implanted, and only brush hair material that is not tapered to other follicle holes is implanted with different brush hair. Although the method of planting the material in which the materials are mixed is adopted, the bristle material for brush 1 of the present invention has the tapered hair 6 and the non-tapered hair 7 at the tip thereof, so that two different brush hairs are formed in one flocked hole. It becomes a state that the material is flocked.

  Here, “tapered hair 6” means a shape having a sharp tip, and “non-tapered hair 7” means a shape in which the tip is not tapered at all, or a tapered hair even when the tip is tapered. 6, when the branched hair 3 is formed by immersing the tip of the brush bristle material 1 in a chemical solution as will be described later, the tip is melted and has a sharp shape. The taper hair 6 is called a taper hair 6, and the tip is not melted at all and is not tapered at all, or is slightly melted and slightly taper but is not sharp like the taper hair 6. Say. Therefore, if the shape of the tapered bristles 6 is expressed by specific numerical values, it can be said that it is appropriate that the diameter of the most advanced portion is 5 to 80 μm, further 5 to 60 μm.

  The form of the bristle material 1 for brushes of the present invention is not limited to the one having one non-tapered bristle 7 at the center and three tapered bristle 6 around the center as shown in FIG. As shown in (f), there are those having one non-tapered hair 7 at the center and two taper hairs 6 on both sides thereof, and the number of tapered hairs 6 and non-tapered hairs 7 depending on the purpose of use. And the arrangement can be chosen arbitrarily.

  Further, as will be described later, the branched hair portion 3 of the brush bristle material 1 of the present invention is formed by a chemical treatment method using a chemical solution. In order to branch the tip into a plurality of portions by this chemical treatment method, The cross-sectional shape of the straight portion 2 of the bristle material 1 for brush is made into a shape in which one or a plurality of sub-cross-section elements 5 having the same shape or different shape from the main cross-section element 6 are connected on the circumference of at least one main cross-section element 6. It is necessary.

  Further, the number of sub-cross-section elements 5 connected is not particularly limited. However, if the number is too large, the diameter of the tapered bristles 6 and / or the non-tapered bristles 7 becomes thin and the fluff becomes weak, and the surface cleaning function is improved. Since it may decrease, the number of connections of the sub-section elements 5 is preferably 2 to 10, and more preferably 2 to 6.

  Here, the main cross-sectional element 4 and the sub-cross-sectional element 5 are not only in the case where the shapes are the same or in the same cross-sectional area, but also in the shapes as shown in, for example, FIGS. This includes cases where the cross-sectional areas are the same, but the cross-sectional areas are the same, but the cross-sectional areas are the same.

  Here, the material constituting the brush bristle material 1 of the present invention is not particularly limited as long as it is a synthetic resin that can be melt-spun. For example, polycapramide, polyhexamethylene adipamide, polyhexamethylene sebacamide (hereinafter referred to as “polyhexamethylene sebacamide”). , Nylon 610), polyhexamethylene dodecamide, nylon 46, nylon MDX6, nylon 11, nylon 12, poly (capramide / hexamethylene adipamide) copolymer and poly (capramide / lauramide) copolymer, etc. Polyamide resin, polyethylene terephthalate (hereinafter referred to as PET), polybutylene terephthalate (hereinafter referred to as PBT), polyethylene naphthalate, polypropylene terephthalate (hereinafter referred to as PTT), polymethylene naphthalate, polybutylene naphthalate, polypropylene Naf Polyester resin such as rate, polyphenylene sulfide, polyvinylidene fluoride, ethylene / tetrafluoroethylene copolymer, polytetrafluoroethylene, tetrafluoroethylene / hexafluoropropylene copolymer, polytetrafluoroethylene / perfluoroalkyl vinyl ether copolymer Fluorine-based polymers such as copolymers, tetrafluoroethylene / vinylidene fluoride copolymers, tetrafluoroethylene / hexafluoropropylene / vinylidene fluoride copolymers, polychlorotrifluoroethylene, ethylene chloride / tetrafluoroethylene copolymers, and fluorovinyl ether One type or two or more types can be appropriately selected and used from resins, polyolefin resins and the like.

  Among them, since a bristle material for a brush having a balance of various physical properties such as high elongation, shrinkage rate and bend recovery is obtained, at least one selected from polyamide resins, polyester resins and fluorine resins, in particular, The use of at least one selected from polyamide-based resins, polyester-based resins, and fluorine-based resins is preferable.

  Further, as will be described later, by adopting a chemical treatment method using a chemical solution, the branched hair portion 3 can be easily formed at the tip of the brush bristle material 1 of the present invention. It is preferable to use a synthetic resin having a high chemical solution dissolution rate for the bristles 6 and a non-tapered hair 7 using a synthetic resin having a chemical solution dissolution rate slower than that of the tapered bristles synthetic resin.

  In particular, when an alkaline solution is used as the chemical solution, it is more preferable to use a polyester-based resin for the tapered hair 6 and a synthetic resin other than the polyester-based resin for the non-tapered hair 7. When the material is only polyester resin, it is easy to melt into a taper hair 6 when the cross-section element is small, and it becomes easy to become a non-taper hair 7 because it takes time to melt when the cross-section element is large. The taper bristles 6 and the non-taper bristles 7 can be formed using the difference in dissolution time depending on the size of each cross-sectional element.

  The brush bristle material 1 in FIG. 1 is obtained when a synthetic resin having a high chemical solution dissolution rate is used for the taper bristles 6 and a synthetic resin having a slower chemical solution dissolution rate than the synthetic resin for the taper bristles 6 is used for the non-tapered hairs 7. Although it is an example, the bristle material 1 for brushes of various forms is obtained by how to use synthetic resins having different chemical solution dissolution rates for each cross-sectional element. For example, in the case of the bristle material 1 for brushes in FIG. When synthetic resins having different chemical dissolution rates are exchanged, the arrangement of the tapered hair 6 and the non-tapered hair 7 is changed, and the hair material 1 for brushes 1 has one taper hair 6 at the center and three non-tapered hairs 7 around it. Is obtained.

  Further, when a polyester resin is used for the bristle material 1 for brushes of the present invention, other dicarboxylic acid components and diol components may be used as copolymerization components in the polyester resin as long as the object of the present invention is not impaired. It can also be contained.

  Furthermore, in the synthetic resin constituting each cross-sectional element of the bristle material 1 for brushes of the present invention, various inorganic fine particles, various metal fine particles, and crosslinks may be used depending on the purpose as long as the effects of the present invention are not impaired. In addition to particles such as polymer particles, known antioxidants, light-proofing agents, anti-molding agents, ion-exchange agents, anti-coloring agents, anti-static agents, various coloring agents, waxes, silicone oils, various surfactants, and various types Reinforcing fibers and the like can be arbitrarily added as appropriate.

  Further, the shape of each cross-sectional element of the bristle material 1 for a brush of the present invention is not particularly limited, and for example, a polygon such as a round shape, a triangle shape, a quadrangular shape, a pentagon shape, etc. Flat shape such as leaf shape, ellipse shape, track shape, and star shape can be mentioned, and you can choose one of these shapes so that each cross-sectional element has the same shape. It is also possible to select arbitrarily from the shape.

  The method for producing the brush hair material 1 of the present invention does not require any special method. For example, a synthetic resin monofilament is spun using a known composite spinning machine and a composite nozzle, and the resulting synthetic resin monofilament is required. Cut into length to create a cut bristle, one end of the cut bristle is immersed in a chemical solution such as an alkaline solution, the tip is chemically treated, and a part of the cross-sectional element 5 is processed into a tapered shape to form a tapered hair 6 In addition, there is a method of forming the branched hair portion 3 in which the non-tapered hair 7 is divided.

  The brush hair material 1 of the present invention includes, for example, phosphate-based, zeolite-based, hydroxyapatite-based antibacterial agents supporting silver ions, zinc oxide, zinc sulfate, zinc chloride, zinc phosphate, Zinc compounds such as zinc nitrate, zinc carbonate, zinc acetate, zinc oxalate, zinc citrate, zinc fumarate, zinc formate, cation antibacterial agents such as benzethonium, benzalkonium, cetylpyridium, chlorhexidine, epigallocatechin, An antibacterial effect can also be imparted by attaching and / or containing a photocatalyst such as tea catechin such as epigallocatechin gallate, epicatechin and epicatechin gallate, anatase type or rutile type titanium dioxide.

  The brush bristle material 1 thus obtained has a synergistic combination of a gap cleaning function for removing dirt adhered to a narrow space and a surface cleaning function for strongly scraping dirt adhered to the surface, and has excellent tactile sensation. Therefore, when the bristle material 1 for brushes of the present invention is used for toothbrushes, body brushes, cleaning brushes, various industrial brushes, etc., an excellent cleaning effect that cannot be obtained with conventional brushes is obtained. can get.

  Moreover, the bristle material 1 for brushes of the present invention can be used not only for brushing purposes for cleaning but also for brushing purposes for application of cosmetic brushes and brushes.

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

  In addition, about practical evaluation of the brush in an Example and a comparative example, it performed as follows.

[Cleanability]
First, 34 flocked holes were opened in a base made of ABS having a flocking area of 9 mm × 22 mm, and brushes were made by flocking brush material so that the number of flocks was 20 / hole and the hair length was 10 mm. .

  Next, an acrylic test plate (A) having a side of 20 mm square and a height of 10 mm is used for evaluating the surface cleaning property, and a width of the acrylic test plate having the same dimensions as the test plate (A) is used for evaluating the clearance cleaning property. A test plate (B) provided with grooves of 0.5 mm and a depth of 1 mm at intervals of 1 mm was prepared, and the staining solution was uniformly applied to the surface of each test plate and allowed to stand and dry for 1 hour.

  Thereafter, the surface of each test plate was brushed using a brush, and the time until about 90% or more of the staining solution was removed was measured.

  The brushing conditions were as follows: the pressing load of the brush on the test plate was 350 g, the brushing amplitude was 30 mm, the amplitude speed was 180 reciprocations / minute, and the average value of 5 times was evaluated.

[Tactile]
Fifteen monitors were asked to evaluate the tactile feel of the brush in the following four stages.
1 ... The contact condition of the hair tip was good, and the touch was excellent.
2 ... Although the hair tip was felt a little hard, the tactile sensation was good.
3 ... The hair ends were hard and the tactile sensation was not good.

[ Reference Example 1]
PBT resin (Torecon 1200S manufactured by Toray Industries, Inc.) and polyester elastomer resin (Hytrel 7247 manufactured by Toray DuPont Co., Ltd.) are supplied to the compound spinning machine, melted and kneaded in the compound spinning machine, and then the synthetic resin is supplied from the compound nozzle. A synthetic resin monofilament in which three sub-cross-section elements made of a polyester-based elastomer resin were connected at equal intervals around the main cross-section element made of PBT resin was subjected to extrusion, further solidification by cooling, heat drawing and heat treatment.

  Next, the obtained synthetic resin monofilament was cut into a length of 32 mm to make a bundle of cut bristle, one end of this bundle was immersed in a sodium hydroxide solution, and three taper hairs made of polyester elastomer resin and PBT resin were used. A bristle material for a brush having one non-tapered bristle was prepared.

[Example 1 ]
Nylon 610 resin (CM2001 manufactured by Toray Industries, Inc.) and PBT resin (Torcon 1200S manufactured by Toray Industries, Inc.) are supplied to the compound spinning machine, melted and kneaded in the compound spinning machine, and then the synthetic resin is extruded from the compound nozzle and further cooled. A synthetic resin monofilament in which three sub-cross-section elements made of PBT resin were connected at equal intervals around a main cross-section element made of nylon 610 resin was subjected to solidification, heat stretching and heat treatment.

  Next, the obtained synthetic resin monofilament was cut into a length of 32 mm to make a bundle of cut bristle, one end of this bundle was immersed in a sodium hydroxide solution, and three taper hairs made of PBT resin and nylon 610 resin were made. A bristle material for a brush having one non-tapered bristle was prepared.

[Example 2 ]
The same two synthetic resins as in Example 1 were supplied to the composite spinning machine, melted and kneaded in the composite spinning machine, then extruded from the composite die, further cooled, solidified, heated and stretched, and subjected to heat treatment, from the nylon 610 resin. A synthetic resin monofilament in which one sub-section element made of PBT resin was connected to the main section element was made.

  Next, the obtained synthetic resin monofilament was cut into a length of 32 mm to form a bundle of cut bristle, one end of this bundle was immersed in a sodium hydroxide solution, one taper hair made of PBT resin and nylon 610 resin. A bristle material for a brush having one non-tapered bristle was prepared.

[Example 3 ]
The same two synthetic resins as in Example 1 were supplied to the composite spinning machine, melted and kneaded in the composite spinning machine, then extruded from the composite die, further cooled, solidified, heated and stretched, and subjected to heat treatment, from the nylon 610 resin. A synthetic resin monofilament in which eight sub-cross-section elements made of PBT resin are connected to the main cross-section element is manufactured.

  Next, the obtained synthetic resin monofilament was cut to a length of 32 mm to form a bundle of cut bristle, one end of this bundle was immersed in a sodium hydroxide solution, and eight taper hairs made of PBT resin and nylon 610 resin were made. A bristle material for a brush having one non-tapered bristle was prepared.

[Example 4 ]
The same two synthetic resins as in Example 1 are supplied to the composite spinning machine, melted and kneaded in the composite spinning machine, and then the synthetic resin is extruded from the composite die, further cooled, solidified, heated and stretched, and subjected to heat treatment to be made of PBT resin. A synthetic resin monofilament in which three sub-cross-section elements made of nylon 610 resin were connected to the main cross-section element was produced.

  Next, the obtained synthetic resin monofilament was cut into a length of 32 mm to form a bundle of cut bristle, one end of this bundle was immersed in a sodium hydroxide solution, one taper hair made of PBT resin and nylon 610 resin. A bristle material for a brush having three non-tapered hairs made of

[Comparative Example 1]
PBT resin (Torecon 1200S manufactured by Toray Industries, Inc.) is supplied to the melt spinning machine, melted and kneaded in the melt spinning machine, then the synthetic resin is extruded from the spinneret, and further cooled, solidified, heated and stretched, and subjected to heat treatment. A round cross-section synthetic resin monofilament consisting only of yarn was produced.

  Next, the obtained synthetic resin monofilament was cut to a length of 32 mm to form a bundle of cut bristle, and this bundle was immersed in a sodium hydroxide solution to prepare a brush hair material having a single taper at the tip.

[Comparative Example 2]
Nylon 610 resin (CM2001 manufactured by Toray Industries, Inc.) is supplied to a melt spinning machine, melted and kneaded in the melt spinning machine, and then a synthetic resin is extruded from a spinneret, and then cooled, solidified, heated and stretched, and subjected to heat treatment. A round cross-section synthetic resin monofilament made only of resin was produced.

  Next, the obtained synthetic resin monofilament was cut into a length of 32 mm, and this cut bristle was used as a brush hair material.

[Comparative Example 3]
PBT resin (Torecon 1200S manufactured by Toray Industries, Inc.) is supplied to the melt spinning machine, melted and kneaded in the melt spinning machine, then the synthetic resin is extruded from the spinneret, and further cooled, solidified, heated and stretched, and subjected to heat treatment. A synthetic resin monofilament having four cross-sectional elements connected in three directions in the same manner as in Example 1 was produced.

  Next, the obtained synthetic resin monofilament was cut to a length of 32 mm to form a bundle of cut bristle, and this bundle was immersed in a sodium hydroxide solution to produce a brush hair material having four tapered hairs.

As is clear from the results in Table 1, the brush hair material of the present invention (Examples 1 to 4 ) is cleaning the gap as compared with the brush hair material (Comparative Examples 1 to 3) that does not satisfy the requirements of the present invention. It can be seen that the sexual function and the surface cleaning function are balanced and high, and the touch is excellent.

  Further, since the balance between the clearance cleaning function and the surface cleaning function can be freely changed by the combination of the synthetic resin to be used and the connection position of the cross-sectional elements, it is possible to make a brush with a wide variety of functions.

  The bristle material for brushes of the present invention has both a tapered hair and a non-tapered hair at the tip thereof, so that it can scrape off dirt adhering to the surface and a gap cleaning function that removes dirt adhering to narrow places. It has a surface-cleaning function synergistically and has excellent tactile sensation, so when this brush bristle material is used in toothbrushes, body brushes, cleaning brushes, various industrial brushes, etc., An excellent cleaning effect not obtained by a brush is obtained.

  In addition, the brush hair material of the present invention can freely change the balance between the gap cleaning function and the surface cleaning function by combining the synthetic resin used and the connection position of each cross-sectional element in various ways. A wide variety of functional variations can be made, and it can be used not only for cleaning brushes but also for brushes such as cosmetic brushes and brushes.

FIG. 1A is a tip sectional view showing an example of the bristle material for a brush of the present invention, FIG. 1B is a sectional view taken along the line BB in FIG. 1A, and FIG. 1C is a sectional view taken along the line AA in FIG. It is sectional drawing. 2A is a front end cross-sectional view showing another example of the bristle material for a brush of the present invention, FIG. 2B is a cross-sectional view taken along line BB in FIG. 2A, and FIG. 2C is AA in FIG. It is arrow sectional drawing. FIGS. 3A to 3E are views showing various cross-sectional shapes in the straight portion of the bristle material for a brush of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Brush hair material 2 Straight part 3 Branch hair part 4 Main cross-section element 5 Sub cross-section element 6 Tapered hair 7 Non-taper hair

Claims (3)

A bristle material for a brush comprising a cut bristle of a synthetic resin monofilament having a cross-sectional shape in which one or a plurality of sub-cross-section elements having the same shape or different shape from the main cross-section element are connected on the circumference of at least one main cross-section element, The cut bristle has a straight portion that maintains the shape of the synthetic resin monofilament, and a branched hair portion formed by dividing the main cross-sectional element and the sub-cross-sectional element at least at one end thereof, and the branched hair portion They bristle brush, wherein a and a non-tapered bristles formed of tapered bristles and a polyester resin other than the synthetic resin made of a polyester resin are mixed. A brush characterized in that the brush bristle material according to claim 1 is used for at least a part of the bristle material. The brush according to claim 2 , wherein the brush is a toothbrush.

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