Bristles, bristle bundle and preparation method thereof, and cosmetic brush

Abstract

The invention provides bristles, a bristle bundle, a preparation method of the bristle bundle and a cosmetic brush. The brush hair comprises a base body and single-layer graphene distributed in the base body, the base body comprises a tip end, the tip end comprises a tip part, the length of the tip part is one fifth to one third of the length of the tip end, and the diameter range of the tip part is 0.01-0.05 mm. The brush hair disclosed by the invention has relatively good antibacterial performance, relatively high elasticity and relatively long service life.

Description

Technical Field

[0001] This invention relates to the field of cosmetic brush technology, and more particularly to a brush bristle, a bristle bundle, a method for preparing the bristle bundle, and a cosmetic brush. Background Technology

[0002] The antibacterial properties of makeup brushes are crucial. Antibacterial materials, such as graphene, are often added to the bristles to improve their cleanliness and antibacterial properties. Graphene has virtually no cytotoxicity to human cells and is safe and harmless in direct contact with human skin. Graphene can kill bacteria by disrupting their cell membranes and inhibit their growth. However, graphene is difficult to disperse; when it aggregates within the bristles, it can easily lead to breakage, thus reducing the quality and lifespan of the makeup brush. Furthermore, the addition of graphene increases the stiffness of the bristles. When the bristles are too stiff, the user may find them too harsh and experience discomfort. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings and deficiencies of the prior art by providing a brush bristle with better antibacterial properties, higher elasticity, and a longer service life.

[0004] The present invention provides a brush bristle comprising a matrix and a single layer of graphene distributed in the matrix, the matrix comprising a tip, the tip comprising a point, the length of the point being one-fifth to one-third of the tip length, and the diameter of the point being 0.01-0.05 mm.

[0005] Furthermore, at least one of the following conditions must be met: The substrate is made of PBT and / or PET; The matrix also contains at least one of the following: reinforcing agent, surfactant, antioxidant, antistatic agent, and colorant.

[0006] Furthermore, at least one of the following conditions must be met: The graphene has a particle size of 5-30 nm; The graphene content in the brush bristles is 0.02-10% by mass. The graphene includes modified graphene, wherein the modified graphene includes graphene modified by a silane coupling agent; or the modified graphene includes graphene with polar groups; or the modified graphene includes graphene with a surfactant coated on its surface.

[0007] Furthermore, the outer surface of the tip is formed with at least one hole, the diameter of which is 8-40 nm.

[0008] The present invention also provides a bristle bundle comprising a plurality of the bristles.

[0009] The present invention also provides a method for preparing a bristle bundle, comprising the following steps: Provide matrix masterbatch and graphene; The matrix masterbatch and graphene are mixed to obtain a mixture; The mixture is granulated to obtain granules; The granular material is extruded to obtain filaments; The filaments are cut, bundled, and sharpened to obtain a bristle bundle. The bristle bundle includes a number of bristles, each bristle including a matrix and a single layer of graphene distributed in the matrix. The matrix includes a tip, the tip including a point, the length of which is one-fifth to one-third of the tip length, and the diameter of which is 0.01-0.05 mm.

[0010] Furthermore, when mixing the matrix masterbatch and graphene, the method for preparing the cosmetic brush further includes the step of mixing at least one of a reinforcing agent, a surfactant, an antioxidant, an antistatic agent, and a colorant.

[0011] Further, the sharpening process includes: providing a strong alkaline solution with a concentration of 20-33 mol / L, wherein the concentration of the strong alkaline solution gradually decreases as the height increases; immersing the bristle bundle portion in the strong alkaline solution for 30-3600 s, wherein the temperature of the sharpening process is 110-140°C.

[0012] The present invention also provides a cosmetic brush, including a handle and a bristle bundle, wherein the handle is connected to the bristle bundle.

[0013] Furthermore, the makeup brush also includes: Controller; A counter, electrically connected to the controller, is used to record the number of brush strokes. The sensor, electrically connected to the controller, is used to detect the position of the bristles and determine whether the position has changed. A camera, electrically connected to the controller, is used to capture images of different areas of the user's face before and while using the makeup brush; A prompter; electrically connected to the controller, used to remind the user; and The battery, electrically connected to the controller, is used to provide power to the counter, sensor, camera, and indicator.

[0014] In this invention, the graphene is distributed within the matrix, giving the bristles antibacterial properties. When the graphene is distributed in a monolayer within the matrix without aggregation, bristle breakage due to aggregation is avoided, thus extending the bristle's lifespan. The bristle tip includes a pointed portion, which is the primary area in contact with the skin. Setting the diameter of the pointed portion within the range of 0.01-0.05 mm increases its elasticity and provides a better user experience. Attached Figure Description

[0015] To more clearly illustrate the solutions of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a makeup brush according to an embodiment of the present invention.

[0017] Figure 2 yes Figure 1 The diagram shows the structure of a makeup brush, with the camera in the on position.

[0018] Figure 3 yes Figure 1 A schematic diagram of the structure of the makeup brush from another angle.

[0019] Figure 4 yes Figure 1 The diagram shown is an exploded view of the makeup brush.

[0020] Figure 5 yes Figure 1 The diagram shows the functional modules of a makeup brush.

[0021] Figure 6 yes Figure 1 The diagram shows the structure of the bristles of the makeup brush.

[0022] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0024] Reference Figure 1-6One embodiment of the present invention provides a makeup brush 100, which can be a foundation brush, concealer brush, eyebrow brush, eyeshadow brush, contour brush, blush brush, or loose powder brush, etc.

[0025] The makeup brush 100 includes a bristle bundle 10 and a handle 20, with the bristle bundle 10 connected to one end of the handle 20. The handle 20 can be fixedly connected to the bristle bundle 10 or detachably connected. A plurality of bristles 11 are integrated into the bristle bundle 10. The user can hold the handle 20 and use the bristles 11 to pick up foundation, eyeshadow, blush, etc., and apply them to the face to achieve a makeup effect.

[0026] The bristles 11 comprise a matrix and a single layer of graphene (not shown) uniformly distributed within the matrix. Graphene is an allotrope of carbon, with carbon atoms bonded by sp² hybridization to form a single layer of hexagonal honeycomb lattice graphene. When the graphene is distributed within the matrix, the bristles 11 possess antibacterial properties. The monolayer distribution of graphene within the matrix, without aggregation, prevents bristle breakage caused by graphene aggregation, thereby extending the lifespan of the bristles 11.

[0027] The base includes a tip 111, and the tip 111 includes a point 112. The diameter of the tip 111 gradually tapers away from the base. This design allows the area closest to the skin, such as the point 112, to have better elasticity, increasing comfort during use. When the makeup brush 100 is used as a foundation brush, the user dips the tip 111 into a small amount of foundation, which adheres to the tip 111 / point 112 for application.

[0028] The substrate can be straight filaments or curved filaments, with curved filaments being filaments having a certain degree of curvature in several regions.

[0029] The substrate is made of polybutylene terephthalate (PBT) and / or polyethylene terephthalate (PET). PBT and PET can react with strong bases to form a sharp point 111 during the sharpening process.

[0030] The length L2 of the tip 112 is one-fifth to one-third of the length L1 of the tip 111, and the diameter of the tip 112 ranges from 0.01 to 0.05 mm, specifically 0.01 mm, 0.02 mm, 0.03 mm, 0.04 mm, or 0.05 mm. The tip 112 is the main area in contact with the skin; setting the diameter of the tip 112 to 0.01-0.05 mm increases its elasticity and provides a better user experience.

[0031] The graphene in the bristles 11 has a particle size of 5-30 nm, specifically 5 nm, 10 nm, 15 nm, 20 nm, 25 nm, or 30 nm; the graphene content by mass percentage is 0.02-10%, specifically 0.02%, 0.03%, 0.04%, 0.05%, 0.06%, 0.07%, 0.08%, 0.09%, 0.1%, 0.15%, 0.2%, 0.25%, 0.3%, 0.35%, 0.4%, 0.45%, 0.5%, 0.55%, 0.6%, 0.65%, 0.7%, 0.75%, 0.8%, 0.85%, 0.9%, 0.95%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, or 10%. The reason why the graphene mass percentage content can be set to a relatively low level, down to as low as 0.02%, is that: the tip 112 of the substrate is the main area in contact with the skin, and the connection part 114 connecting the substrate and the brush handle 20 has a low probability of contacting the skin; the tip 112 is small in size, and if the graphene content is high, the tip 112 is prone to breakage; even if the graphene content in a single bristle 11 / tip 112 is not high, the number of bristles 11 in the bristle bundle 10 is large, and the graphene aggregate in the bristle bundle 10 can still achieve a good antibacterial effect. In order to maintain the toughness / elasticity of the tip 112 while having a good antibacterial effect, the size of the tip 112 can be set to 0.01-0.05mm, and the graphene content in the tip 112 can be set to 0.02-10% (preferably 0.02-1%, more preferably 0.02-0.2%), so as to achieve both good toughness and antibacterial effect. The size of the tip 112 is proportional to the graphene content. When the size of the tip 112 is small, the graphene content is also small, and when the size of the tip 112 is large, the graphene content is also large.

[0032] The graphene may include modified graphene. The modified graphene includes graphene modified with a silane coupling agent, the molecular structure of which is generally YR-Si(OR)3, where Y represents an organic functional group and SiOR represents a silane oxygen group, specifically aminopropyltriethoxysilane, vinyltriethoxysilane, vinyltrimethoxysilane, or polyoxyethylene sorbitan monolaurate, etc.

[0033] The modified graphene includes graphene with polar groups, which are hydroxyl and / or carboxyl groups.

[0034] The modified graphene comprises graphene coated with a surfactant. The lipophilic groups of the surfactant are connected to the graphene, and the hydrophilic groups of the surfactant are used to improve the compatibility between the graphene and the matrix. The addition of the surfactant keeps the graphene in a monolayer state, preventing the aggregation of multiple graphene layers and the breakage of the tip 111. The surfactant is selected from at least one of polyvinyl alcohol, polyvinylpyrrolidone, and polyethylene oxide. The mass percentage content of the surfactant is 0.01-2%, specifically 0.01%, 0.02%, 0.03%, 0.04%, 0.05%, 0.06%, 0.07%, 0.08%, 0.09%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, or 2%.

[0035] The matrix also contains a reinforcing agent at a mass percentage of 0.1-1%, specifically 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, or 1%. The reinforcing agent is selected from at least one of silica, tetraoctyl pyromellitic acid, triglyceride trimellitate, epoxidized soybean oil, octyl epoxidized fatty acid, and tributyl acetylacetic acid. The particle size of the reinforcing agent can be 10-30 nm, specifically 10 nm, 15 nm, 20 nm, 25 nm, or 30 nm. The single-layer graphene has a particle size of 5-30 nm. The small size of graphene allows for the addition of a smaller reinforcing agent to strengthen the matrix / tip 111 if the amount of graphene added is too small, preventing the bristles 11 from breaking.

[0036] The matrix also contains a pigment at a mass percentage of 0.001-0.5%, wherein the mass percentage of the pigment can be 0.001%, 0.002%, 0.003%, 0.004%, 0.005%, 0.006%, 0.007%, 0.008%, 0.009%, 0.01%, 0.02%, 0.03%, 0.04%, 0.05%, 0.06%, 0.07%, 0.08%, 0.09%, 0.1%, 0.15%, 0.2%, 0.25%, 0.3%, 0.35%, 0.4%, 0.45%, or 0.5%. The pigment is selected from at least one of carbon black, iron oxide red, iron oxide yellow, titanium dioxide, phthalocyanine blue, and phthalocyanine green. When the matrix / tip 111 exhibits color, the makeup brush 100 becomes more attractive.

[0037] The matrix further contains an antioxidant at a mass percentage of 0.001-0.1%, wherein the mass percentage of the antioxidant may be 0.001%, 0.002%, 0.003%, 0.004%, 0.005%, 0.006%, 0.007%, 0.008%, 0.009%, 0.01%, 0.02%, 0.03%, 0.04%, 0.05%, 0.06%, 0.07%, 0.08%, 0.09%, or 0.1%. The antioxidant may be at least one of the following: vitamin E derivative, hindered amine light stabilizer, tocopherol, butylated hydroxytoluene, butylated hydroxyanisole, pentaerythritol tetraester, pentaerythritol tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], phosphites, thiodipropionate, and rosemary extract. The antioxidant can delay the oxidation of graphene and maintain its antibacterial properties.

[0038] The matrix further contains an antistatic agent at a mass percentage of 0.001-0.1%, wherein the mass percentage of the antistatic agent may be 0.001%, 0.002%, 0.003%, 0.004%, 0.005%, 0.006%, 0.007%, 0.008%, 0.009%, 0.01%, 0.02%, 0.03%, 0.04%, 0.05%, 0.06%, 0.07%, 0.08%, 0.09%, or 0.1%. The antistatic agent may be at least one of the following: alkyl sulfonates (such as sodium dodecylbenzene sulfonate, sodium secondary alkyl sulfonate, or sodium alkyl sulfonate); phosphate salts (such as potassium alkyl phosphate, alkyl ether phosphate, higher alcohol phosphate, or bis(trimethylolpropane) phosphate); ethoxylated alkylamines (such as ethoxycocoyl amine, or N,N-bis(2-hydroxyethyl)C8-C18 alkylamine); glycerol fatty acid esters (such as mono- and diglycerol fatty acids, glycerol monostearate, or polyglycerol fatty acid esters); polystyrene sulfonates (such as sodium polystyrene sulfonate or calcium polystyrene sulfonate); polyoxyethylene ether esters; sorbitan fatty acid esters; acrylonitrile-styrene-acrylate copolymers; styrene-acrylonitrile copolymers; polyethylene glycol derivatives; zinc-containing polyether esters; and carbon nanotubes. The surface resistance of the brush bristles 11 with the added antistatic agent is less than 10 Ω·cm. 6 Ω indicates that the bristles 11 have a better antistatic effect.

[0039] The makeup brush 100 also includes a controller 30, a counter 40, a sensor 50, a camera 60, a prompter 70, and a battery 80. The counter 40, sensor 50, camera 60, prompter 70, and battery 80 are all electrically connected to the controller 30. The battery 80 provides power to the controller 30, counter 40, sensor 50, camera 60, and prompter 70. The controller 30, counter 40, sensor 50, camera 60, prompter 70, and battery 80 can be installed in the receiving portion 21 of the brush handle 20.

[0040] The controller 30 can integrate one or more of the following: a central processing module, an image processing module, and a modem module. The processor 40 can connect to various components within the makeup brush 100 using various interfaces and lines, process various data from the makeup brush 100, and execute various functions of the makeup brush 100.

[0041] Counter 40 is a device for storing / displaying the number of times a specific event or process occurs, and can be a sequential logic circuit with a "clock" input line and multiple output lines. Counter 40 can record the number of brush strokes of brush 11.

[0042] Sensor 50 is used to detect the position of the bristles 11 and determine whether the position has changed. Sensor 50 can be a photoelectric switch or a Hall sensor. The left and right sides of the human face each have 11 regions: forehead, temporal, orbital, nasal, lip, chin, ear, zygomatic, infraorbital, cheek, and parotid-masseteric region. Sensor 50 can detect which area of ​​the face the bristles 11 are located in. When sensor 50 and counter 40 are used in combination, the number of brush strokes of the bristles 11 in one or more areas of the face can be detected. For example, counter 40 can record the number of brush strokes in the left forehead region, the number of brush strokes in the left infraorbital region, the number of brush strokes in the right cheek region, and so on. The camera 60 is visible through the opening 22 of the brush handle 20. In a preferred embodiment, the camera 60 is rotatably mounted at the opening 22. By pressing the camera 60, it rotates outward, allowing it to capture a face; pressing it again allows it to be received within the opening 22. The camera 60 can capture images of different areas of the user's face before and during the use of the makeup brush 100, and compare and analyze these images with a preset skin condition database using the image processing module of the controller 30. When the comparison analysis determines that a certain area of ​​the face has been properly made up, a reminder can be given via the prompt 70, such as a flashing reminder, vibration reminder, voice reminder, or display reminder. When the comparison analysis determines that a certain area of ​​the face has not been properly made up and the user stops operating, a reminder can also be given via the prompt 70, such as a flashing reminder, vibration reminder, voice reminder, flashing reminder, or display reminder.

[0043] The indicator 70 can be at least one of an LED light 71, a vibrator 72, a speaker 73, and a display screen 74, and can be modularly combined according to the application scenario. When a user swipes in a certain area, the counter 40 and the sensor 50 can record the number of swipes in that area. When the number of swipes exceeds a preset threshold (e.g., reaching 20 times), the indicator 70 can remind the user through flashing reminders, vibration reminders, voice reminders, flashing reminders, or display screen reminders that the area has been swipened too many times. The display screen 74 can display the number of swipes in one or more areas.

[0044] The battery 80 can be a rechargeable battery or a disposable battery. The battery 80 preferably uses a flexible solid-state battery module, whose irregular shape is adapted to the arc-shaped inner cavity of the brush handle 20. The components inside the brush handle 20 can be replaced or repaired by removing the battery cover 23. A charging interface 81 is located at the end of the brush handle 20 for the user to charge the battery 80.

[0045] The present invention also provides a method for preparing a bristle bundle 10, comprising the following steps: Mix the matrix masterbatch, graphene, and surfactant, and stir at 500-1000 rpm for 5-10 minutes to obtain a mixture. The mixture is granulated to obtain granular masterbatch; The granular masterbatch is extruded to obtain filaments; After the filaments are cooled, they are drawn into a setting oven by traction rollers for heat setting. The filaments after the heat-setting treatment are then shredded, bundled, and sharpened to obtain a bristle bundle 10. The bristle bundle 10 includes several bristles 11, each bristle 11 comprising a matrix and a single layer of graphene distributed within the matrix. The matrix includes a tip 111, and each tip 111 includes a point 112. The diameter of the tip 111 gradually decreases in the direction away from the matrix. This design allows the area closest to the skin, such as the point 112, to have better elasticity, increasing comfort during use. When the makeup brush 100 is used as a foundation brush, the user dips a small amount of foundation into the tip 111, which adheres to the tip 111 / point 112 for application.

[0046] The matrix masterbatch may be PBT and / or PET.

[0047] The graphene in the bristles 11 has a particle size of 5-30 nm, specifically 5 nm, 10 nm, 15 nm, 20 nm, 25 nm, or 30 nm; the graphene content by mass percentage is 0.02-10%, specifically 0.02%, 0.03%, 0.04%, 0.05%, 0.06%, 0.07%, 0.08%, 0.09%, 0.1%, 0.15%, 0.2%, 0.25%, 0.3%, 0.35%, 0.4%, 0.45%, 0.5%, 0.55%, 0.6%, 0.65%, 0.7%, 0.75%, 0.8%, 0.85%, 0.9%, 0.95%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, or 10%. The reason why the graphene mass percentage content can be set to a relatively low level, down to as low as 0.02%, is that: the tip 112 of the substrate is the main area in contact with the skin, and the connection part 114 connecting the substrate and the brush handle 20 has a low probability of contacting the skin; the tip 112 is small in size, and if the graphene content is high, the tip 112 is prone to breakage; even if the graphene content in a single bristle 11 / tip 112 is not high, the number of bristles 11 in the bristle bundle 10 is large, and the graphene aggregate in the bristle bundle 10 can still achieve a good antibacterial effect. In order to maintain the toughness / elasticity of the tip 112 while having a good antibacterial effect, the size of the tip 112 can be set to 0.01-0.05mm, and the graphene content in the tip 112 can be set to 0.02-10% (preferably 0.02-1%, more preferably 0.02-0.2%), so as to achieve both good toughness and antibacterial effect. The size of the tip 112 is proportional to the graphene content. When the size of the tip 112 is small, the graphene content is also small, and when the size of the tip 112 is large, the graphene content is also large.

[0048] The graphene may include modified graphene. The modified graphene includes graphene modified with a silane coupling agent, the molecular structure of which is generally YR-Si(OR)3, where Y represents an organic functional group and SiOR represents a silane oxygen group, specifically aminopropyltriethoxysilane, vinyltriethoxysilane, vinyltrimethoxysilane, or polyoxyethylene sorbitan monolaurate, etc.

[0049] The modified graphene includes graphene with polar groups, which are hydroxyl and / or carboxyl groups.

[0050] The modified graphene comprises graphene coated with a surfactant. The lipophilic groups of the surfactant are connected to the graphene, and the hydrophilic groups of the surfactant are used to improve the compatibility between the graphene and the matrix. The addition of the surfactant keeps the graphene in a monolayer state, preventing the aggregation of multiple graphene layers and the breakage of the tip 111. The surfactant is selected from at least one of polyvinyl alcohol, polyvinylpyrrolidone, and polyethylene oxide. The mass percentage content of the surfactant is 0.01-2%, specifically 0.01%, 0.02%, 0.03%, 0.04%, 0.05%, 0.06%, 0.07%, 0.08%, 0.09%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, or 2%.

[0051] It can also be mixed with a reinforcing agent at a mass percentage of 0.1-1%, a colorant at a mass percentage of 0.001-0.5%, an antioxidant at a mass percentage of 0.001-0.1%, and an antistatic agent at a mass percentage of 0.001-0.1%.

[0052] The reinforcing agent is selected from at least one of silicon dioxide, tetraoctyl pyromellitic acid, triglyceride trimellitate, epoxidized soybean oil, octyl epoxidized fatty acid, and tributyl acetylacetic acid. The particle size of the monolayer graphene is 5-30 nm. The small size of the graphene allows for the addition of a smaller reinforcing agent to strengthen the matrix / tip 111 if the amount of graphene added is too small, thus preventing the bristles 11 from breaking.

[0053] The pigment is selected from at least one of carbon black, iron oxide red, iron oxide yellow, titanium dioxide, phthalocyanine blue, and phthalocyanine green. The makeup brush 100 is more attractive when the substrate / tip 111 displays color.

[0054] The antioxidant may be at least one selected from vitamin E derivatives, hindered amine light stabilizers, tocopherol, butylated hydroxytoluene, butylated hydroxyanisole, pentaerythritol tetraester, pentaerythritol tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], phosphites, thiodipropionates, and rosemary extract. The antioxidant can delay the oxidation of graphene and maintain the durability of its antibacterial properties.

[0055] The antioxidant can delay the oxidation of graphene and maintain the durability of its antibacterial properties. The antistatic agent can be at least one of the following: alkyl sulfonates (such as sodium dodecylbenzene sulfonate, sodium secondary alkyl sulfonate, or sodium alkyl sulfonate), phosphate salts (such as potassium alkyl phosphate, alkyl ether phosphate, higher alcohol phosphate, or bis(trimethylolpropane) phosphate), ethoxylated alkylamines (such as ethoxycocoyl amine, or N,N-bis(2-hydroxyethyl)C8-C18 alkylamine), glycerol fatty acid esters (such as mono- and diglyceride fatty acids, glycerol monostearate, or polyglycerol fatty acid esters), polystyrene sulfonates (such as sodium polystyrene sulfonate or calcium polystyrene sulfonate), polyoxyethylene ether esters, sorbitan fatty acid esters, acrylonitrile-styrene-acrylate copolymers, styrene-acrylonitrile copolymers, polyethylene glycol derivatives, zinc-containing polyether esters, and carbon nanotubes. The surface resistance of the brush bristles 11 with the added antistatic agent is less than 10 Ω·cm. 6 Ω indicates that the bristles 11 have a better antistatic effect.

[0056] The extrusion molding is a single-screw extrusion molding. The extrusion molding temperature can be 230-270°C, and the screw rotation speed is 10-200 rpm.

[0057] The cooling process can be water cooling. The heat setting process can be performed at a temperature of 140-280°C for 5-200 seconds, and can be carried out by irradiating the filaments with ultraviolet or infrared light.

[0058] During the stirring process, ultrasonic-assisted dispersion can be used to effectively prevent agglomeration caused by π-π stacking and ensure uniform distribution of monolayer graphene. The ultrasonic frequency is 20-40kHz, the power is 500-1000W, the processing time is 10-30 minutes, and the temperature is 25-35℃.

[0059] The tipping process can be achieved by providing a strong alkaline solution with a concentration of 20-33 mol / L, preferably 20-30 mol / L, specifically 20 mol / L, 25 mol / L, 30 mol / L, or 33 mol / L. The strong alkaline solution can be sodium hydroxide, potassium hydroxide, or lithium hydroxide, etc. In the strong alkaline solution, the concentration gradually decreases with increasing height (i.e., the concentration at the top is lower than the concentration at the bottom). A portion of the bristle bundle 10 is immersed in the strong alkaline solution for 30-3600 seconds. The strong alkaline reacts with the matrix of the bristles 11, causing the tips 111 of the bristles 11 immersed in the strong alkaline solution to form a roughly conical structure (excluding a portion of the bristle 11). This conical structure is characterized by the tip 111 gradually increasing in size along the direction away from the tip 111. After the sharpening process, the length of the tip 112 of the tip 111 is one-fifth to one-third of the length of the tip 111, and the diameter of the tip 112 ranges from 0.01 to 0.05 mm. The specific time for the sharpening process can be 30 seconds, 60 seconds, 5 minutes, 10 minutes, 30 minutes, 60 minutes, 1.5 hours, 2 hours, 2.5 hours, 3 hours, 3.5 hours, 4 hours, 4.5 hours, 5 hours, 5.5 hours, or 6 hours. The temperature for the sharpening process is 110-140°C.

[0060] During the sharpening process, a strong alkali corrodes part of the substrate 10, forming a tip 111. Some graphene at the tip 111 falls off, forming a hole 113. The diameter of this hole 113 is 8-40 nm, and its depth is 1-10 nm. The diameter of the hole 113 can be 8 nm, 10 nm, 15 nm, 20 nm, 25 nm, 30 nm, 35 nm, or 40 nm; the depth of the hole 113 can be 1 nm, 2 m, 4 m, 6 m, 8 m, or 10 m.

[0061] Before the shredding process, a bending process can be performed to obtain curved filaments. The curved filaments are filamentous materials with a certain degree of curvature in several areas. The bending process can be performed by passing the filamentous material through a bending machine to obtain curved filaments.

[0062] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A type of brush bristles, characterized in that, The bristles include a matrix and a single layer of graphene distributed in the matrix. The matrix includes a tip, the tip includes a point, the length of which is one-fifth to one-third of the tip length, and the diameter of which is 0.01-0.05 mm.

2. The bristles according to claim 1, characterized in that, At least one of the following conditions must be met: The substrate is made of PBT and / or PET; The matrix also contains at least one of the following: reinforcing agent, surfactant, antioxidant, antistatic agent, and colorant.

3. The bristles according to claim 1, characterized in that, At least one of the following conditions must be met: The graphene has a particle size of 5-30 nm; The graphene content in the brush bristles is 0.02-10% by mass. The graphene includes modified graphene, wherein the modified graphene includes graphene modified by a silane coupling agent; or the modified graphene includes graphene with polar groups; or the modified graphene includes graphene with a surfactant coated on its surface.

4. The bristles according to claim 1, characterized in that, The outer surface of the tip has at least one hole with a diameter of 8-40 nm.

5. A bristle bundle, characterized in that, It includes several bristles as described in any one of claims 1-4.

6. A method for preparing a bristle bundle, comprising the following steps: Provide matrix masterbatch and graphene; The matrix masterbatch and graphene are mixed to obtain a mixture; The mixture is granulated to obtain granules; The granular material is extruded to obtain filaments; The filaments are cut, bundled, and sharpened to obtain a bristle bundle. The bristle bundle includes a number of bristles, each bristle including a matrix and a single layer of graphene distributed in the matrix. The matrix includes a tip, the tip including a point, the length of which is one-fifth to one-third of the tip length, and the diameter of which is 0.01-0.05 mm.

7. The method for preparing bristle bundles according to claim 6, characterized in that, When mixing the matrix masterbatch and graphene, the method for preparing the cosmetic brush further includes the step of mixing at least one of a reinforcing agent, a surfactant, an antioxidant, an antistatic agent, and a colorant.

8. The method for preparing bristle bundles according to claim 6, characterized in that, The sharpening process includes: providing a strong alkaline solution with a concentration of 20-33 mol / L, wherein the concentration of the strong alkaline solution gradually decreases as the height increases; immersing the bristle bundle portion in the strong alkaline solution for 30-3600 s, wherein the temperature of the sharpening process is 110-140°C.

9. A makeup brush, characterized in that, It includes a brush handle and a bristle bundle as described in claim 5, wherein the brush handle is connected to the bristle bundle.

10. The makeup brush according to claim 9, characterized in that, The makeup brush also includes: Controller; A counter, electrically connected to the controller, is used to record the number of brush strokes. The sensor, electrically connected to the controller, is used to detect the position of the bristles and determine whether the position has changed. A camera, electrically connected to the controller, is used to capture images of different areas of the user's face before and while using the makeup brush; A prompter; electrically connected to the controller, used to remind the user; and The battery, electrically connected to the controller, is used to provide power to the counter, sensor, camera, and indicator.

Images