1726 results about "Coloring agents" patented technology

The invention provides a high-insulation black organic silicon coloring agent and a preparation method thereof. The high-insulation black organic silicon coloring agent comprises the following raw materials in parts by mass: 100 parts of a silicone oil carrier; 3-5 parts of passivated carbon black; 1-3 parts of fumed silica; wherein the passivated carbon black comprises carbon black and an organic silicon layer coated on the surface of the carbon black; the organic silicon layer is obtained by graft polymerization of polymethyltriethoxysilane and a functionalized silane coupling agent on the surface of the carbon black; the functionalized silane coupling agent comprises at least one of an aryl silane coupling agent and a fluorine-containing silane coupling agent. According to the black coloring agent, the advantage of high blackness of carbon black is maintained, meanwhile, the electric insulation performance and dispersion stability of the black coloring agent in a silicone oil system are remarkably improved, the problems that the carbon black is high in conductivity, poor in interface compatibility and prone to agglomeration are solved, and the black coloring agent is especially suitable for being applied to organic silicon materials with the high requirement for the insulation performance.

The invention discloses a method for preparing a light-transmitting gradient multicolor zirconium oxide material through photocuring, which comprises the following steps: preparing modified aluminum oxide which is formed by attaching a strontium element and a chromium element to the surface of aluminum oxide; preparing bottom-layer slurry, middle-layer slurry and upper-layer slurry from the zirconium-aluminum powder; the bottom layer slurry comprises zirconium aluminum powder and a coloring agent; the middle layer slurry comprises zirconium-aluminum powder, a light-transmitting auxiliary agent and a coloring agent; the upper-layer slurry comprises zirconium-aluminum powder, a light-transmitting auxiliary agent and a coloring agent; preparing a bottom layer green body by using the bottom layer slurry through 3D printing by using the photocuring slurry, preparing a middle layer green body on the surface of the bottom layer green body by using the middle layer slurry, and preparing an upper layer green body on the surface of the middle layer green body by using the upper layer slurry, so as to obtain a zirconium oxide material green body; the light-transmitting gradient multicolor zirconia material with gradient light transmission and gradient color is directly prepared through 3D printing, the color of the light-transmitting gradient multicolor zirconia material is closer to that of real teeth, and the strength and toughness are not reduced.

The invention discloses an efficient polyester color master batch and a preparation method thereof, and relates to the technical field of polyester color master batches. The high-efficiency polyester color master batch is prepared from the following raw materials in parts by mass: 40-70 parts of a polyamide carrier, 20-50 parts of a coloring agent, 5-15 parts of a dispersing agent, 1-5 parts of a lubricating agent and 0.5-3 parts of an antioxidant. The special antioxidant specially designed for a polyamide carrier is adopted, the compatibility with the carrier is improved based on the principle of similar dissolves, the problem that a traditional antioxidant is uneven in dispersion to form an anti-oxidation blind area is fundamentally solved, meanwhile, volatilization and migration in the processing process are inhibited by means of high thermal stability of the molecular structure of the antioxidant, and the anti-oxidation performance of the carrier is improved. The color master batch endows a polyester product with a longer anti-oxidation protection effect, and the problems of yellowing, chromatic aberration and the like caused by oxidation in the processing and using processes of the product can be effectively reduced.

Disclosed in the present invention are a 90°C thermoplastic halogen-free low-smoke flame-retardant polyolefin sheath material and a preparation method therefor. The sheath material is prepared from raw materials comprising the following components in parts by mass: 20-40 parts of an ethylene-vinyl acetate copolymer, 20-40 parts of a linear low-density polyethylene, 2-10 parts of a high-density polyethylene, 20-40 parts of a metallocene ethylene-octylene copolymer, 10-15 parts of a maleic-anhydride-grafted metallocene linear low-density polyethylene copolymer, 58-73 parts of aluminum hydroxide, 20-25 parts of modified magnesium hydroxide, 64-84 parts of a synergistic flame retardant, 2-3 parts of a coupling agent, 1-4 parts of a lubricant, 1-3 parts of an antioxidant, and 2-7 parts of a coloring agent, wherein the synergistic flame retardant comprises lithium oxide. A matrix resin has low-temperature performance, mechanical properties and cracking resistance. With regard to flame retardance, a large amount of the synergistic flame retardant, i.e., lithium oxide, is added to a traditional magnesium-aluminum compound flame-retardant system, and therefore an off-white hard shell can be formed during a combustion process while low heat release is ensured, thereby ensuring no dripping during the combustion process.

The invention belongs to the field of medical instrument coloring agents, and provides a natural anthocyanin endoscope coloring agent. According to the invention, the innovative design of combining a ternary color-stabilizing compound formed by anthocyanin, a co-chromophore and hydroxypropyl beta cyclodextrin with a chitosan sodium alginate polysaccharide system and a composite buffer system is adopted, and the viscosity is controlled to be 200-320 millisecond, the particle size of spray droplets is 40-60 microns, and the thickness of a thin film is 10-30 microns through specific molar ratio compatibility and a genipin crosslinking technology. Through accurate regulation and control, the excellent performance that a double-network thin layer is formed under the calcium ion environment that the absorbance retention rate at 520 nanometers is not lower than 90% and the elution rate is not lower than 90% under the irradiation of hundred thousand lux white light is achieved, the technical problems that a traditional endoscope coloring agent is poor in safety, low in stability and insufficient in mucous membrane contrast ratio are solved, and the wide clinical application value is achieved.

The application discloses a kind of imitated plant leaf hydrogel composite material and preparation method thereof, belong to bionic composite material field.The application first by colorant compounding preparation printing paste, and fabric is printed, obtain the green fabric that can realize to plant leaf " green peak " and " red edge " spectral characteristic simulation, and with green fabric simulation leaf structure in fence organization and skeleton;Then with biomaterial polyvinyl alcohol (PVA) as base material, join with strong hygroscopic monomer and crosslinking agent, initiator blend preparation hydrogel prepolymer solution;Finally, hydrogel prepolymer solution is poured into the mold containing green fabric and copolymerization, it directly forms hydrogel in fabric surface and pore interior, obtains imitated plant leaf hydrogel composite material.The material gets rid of the dependence on hygroscopic salt, has water absorption and simulation effect stable, durability is good and the like advantages.

The invention discloses a magnesium reinforced porcelain black underglaze coloring agent as well as a preparation method and application thereof, and belongs to the technical field of underglaze coloring agents. The magnesium porcelain reinforced porcelain black underglaze coloring agent comprises the following solid components in percentage by weight: 12-15% of potassium feldspar, 9-15% of albite, 9-12% of calcite, 11-15% of quartz, 16-20% of kaolin, 1-1.2% of methyl cellulose and 31-34% of cobalt black pigment. Wherein the weight content of K2O in the potassium feldspar is greater than or equal to 10%; the weight content of Al2O3 in the kaolin is greater than or equal to 37%; and the weight content of Co3O4 in the cobalt black pigment is 15-25%. The prepared black underglaze coloring agent can be well suitable for a magnesium reinforced porcelain body and a cover glaze of a low-temperature fritted glaze, an obtained black underglaze product is full and pure in color development, the blue bleaching phenomenon does not occur after decoration firing, and meanwhile the glaze surface is free of orange color and pinholes.

A method for manufacturing a lithium disilicate glass ceramic with gradient properties by using photocuring additive manufacturing, the method comprising: performing wet mixing on a basic glass powder with a solvent, ball milling same until uniformity, drying same, then performing thermal treatment to reach a molten state, then quenching same to form original particles, and then granulating same to obtain lithium disilicate ceramic particles; respectively preparing n groups of pastes with gradually-changing colors and translucencies from n groups of the lithium disilicate ceramic particles, said paste preparation comprising: adding 3Y-TZP powder, a coloring agent and lithium disilicate ceramic particles to a resin mixture, mixing same, rolling same and performing vacuum defoaming to obtain a paste; adding the n groups of pastes in sequence into an additive manufacturing device to undergo photocuring forming, so as to obtain a green body; after the green body is cleaned and dried, degreasing the green body, and sintering same; and finally under a vacuum high-temperature condition, subjecting the sintered sample to an ion exchange reaction with a molten nitrate in a flowing state, so as to obtain a product.

The invention relates to the technical field of polymer dye synthesis, in particular to a polymer coloring agent based on a binary acid chromophoric monomer, a color master batch, a fiber and a preparation method of the polymer coloring agent. The structural formula of the diacid chromophoric monomer is as follows: # imgabs0. The chromophoric monomer has extremely high thermal stability, and can maintain the chemical structural integrity and chromophoric performance in a high-temperature environment (250 DEG C). The heat-resistant characteristic is mainly derived from a highly stable aromatic skeleton formed by a parent nucleus through an expanded conjugated system and a rigid plane structure, and heat vibration energy is effectively dispersed; in addition, a thermal stable group (an all-carbon skeleton) is introduced through side chain modification to form a steric hindrance effect, and molecular movement at high temperature is inhibited. Due to the unique heat resistance of the monomer, the monomer can be completely matched with a high-temperature processing window (240-300 DEG C) of a polyester melt polymerization process, and a polymer-dye composite system with a stable structure is constructed through covalent bonding in ester exchange and polycondensation processes.

The invention relates to the field of coating materials, and discloses a passivation solution for a hot-dip galvanized workpiece as well as a preparation method and a use method.The passivation solution is prepared from organic pottery clay, titanium dioxide, ethylene-vinyl acetate copolymer emulsion, waterborne epoxy silicon resin, a silane coupling agent, a coloring agent, filler, an auxiliary and water. The problem of light pollution in areas with high illumination intensity can be effectively solved, workpieces and vegetation in natural scenic areas are organically fused to form beautiful scenery lines, and the technical problems of high cost and weak corrosion resistance of green coatings caused by the fact that green towers are achieved by coating green paint at present can be effectively solved. And the pole tower is green, attractive and good in economic benefit.

The invention relates to microbial colorant compositions and associated processes to produce the same. Microbial colorant compositions are produced by combining microbially derived pigment molecules and microbial biosurfactants. The pigment molecules are obtained either directly from a fermentation broth or by extracting a precursor and transforming it into a pigment using chemical or enzymatic processes. A separately produced biosurfactant, such as a rhamnolipid or surfactin, is added to the obtained pigment molecule to create a pre-dispersed formulation. The biosurfactant may be added at various steps of This approach improves pigment dispersion, solubility, and substrate compatibility, enabling stable aqueous formulations without synthetic additives. The resulting compositions are suitable for wide range of applications including in textiles, food, cosmetics, and polymer materials. Processes for producing and combining the pigment and biosurfactant are also disclosed, including variations in fermentation, extraction, and formulation stages.

The invention relates to the technical field of electronic packaging materials, and discloses an epoxy molding compound and a preparation method thereof. The epoxy molding compound is prepared from the following raw materials in percentage by weight: 70 to 90 percent of filler, 5 to 15 percent of epoxy resin, 3.1 to 10.5 percent of phenolic resin-stearylamine intermediate, 0.2 to 0.8 percent of catalyst, 1 to 5 percent of stress absorbent, 0.2 to 2 percent of coupling agent, 0.1 to 1.2 percent of release agent and 0.1 to 0.5 percent of coloring agent. According to the invention, by adding the phenolic resin-stearylamine intermediate into the epoxy molding compound, the final volume resistivity of the epoxy molding compound can be reduced to 108-1011 omega.cm, and by reducing the volume resistivity and improving the conductivity of the material, rapid release of static electricity is realized, and the problem of electrostatic adsorption is solved.

Formulation delivery systems, formulation delivery devices, and formulation cartridges for the same are provided. Formulation delivery systems include a reusable handle, a formulation dispensing assembly, and a controller. The formulation dispensing assembly includes a reciprocating nozzle assembly and a pump. The reciprocating nozzle assembly is fluidically-coupleable to the formulation cartridge or the cleaning cartridge received within the reusable handle. Formulation delivery devices include a reusable handle configured to receive a formulation cartridge therein, and a formulation dispensing assembly disposed in the reusable handle. The formulation dispensing assembly includes fluid conduits, a pump fluidically connected to the fluid conduits, a reciprocating nozzle assembly, and a controller. Formulation cartridges include a reusable cartridge body and a formulation cartridge refill unit.

The invention relates to a thermoplastic molding composition (P) comprising: (A) thermoplastic polymer composition (A) comprising: (A-1) 10 to 50 wt.-% of graft copolymer (A-1), (A-2) 1 to 50 wt.-%, of thermoplastic polymer matrix (A-2) based on one or more vinylaromatic copolymers, (A-3) 20 to 50 wt.-%, of polymerized alkyl methacrylate component (A-3), and (A-4) 0 to 45 wt.-% of comonomer which is copolymerized with the at least one polymerized alkyl methacrylate component (A-3), where the sum of (A-1), (A-2), (A-3) and optional comonomers (A-4) is 83.2 to 99.8 wt.-%; (B) a hindered amine light stabilizer composition (B), comprising at least two of substances (B-1) to (B-3): (B-1) 0 to 0.9 wt.-%, of at least one hindered amine light stabilizer having a dipiperidine structure with at least one alkyl group at each of the 2 and 6 positions of the dipiperidine structure (B-2) 0 to 0.9 wt.-%, of a hindered amine light stabilizer mixture having a monopiperidine structure with at least one alkyl group at each of the 2 and 6 positions of the monopiperidine structure, and (B-3) 0 to 2 wt.-%, of at least one hindered amine light stabilizer having a polymeric structure comprising piperidine groups with at least one alkyl group at each of the 2 and 6 positions of the piperidine groups (C) 0 to 5 wt.-%, of one or more further additives (C), different from (B); and (D) 0 to 10 wt.-%, of colorants, dyes and / or pigments (D), different from (C); wherein the constituents (A) to (D) sum up to 100 wt.-% of the molding composition (P).

The application relates to the technical field of cosmetics, in particular to a high-concealment makeup-maintaining air cushion and a preparation method thereof. A film forming agent in the high-concealment makeup-maintaining air cushion comprises the following: trimethylsiloxy silicate 5-7 parts, isododecane 0.3-0.7 parts, and acrylic acid (ester) / polymethyltrimethicone methacrylate copolymer 2-3 parts. A colorant comprises the following raw materials in parts by weight: titanium dioxide 5-7 parts, silica 0.8-1.2 parts, mica powder 5-7 parts, CI 77492 0.4-0.8 parts, aluminum hydroxide 0.8-1.2 parts, CI 77491 0.4-0.6 parts, triethoxyl octyl silane 0.8-1.2 parts, and CI 77499 0.3-0.5 parts. The particle size of the titanium dioxide at least comprises any two of 4 nm, 30-50 nm and 200-260 nm. The air cushion has the advantages of prolonging the makeup-maintaining time of the air cushion and improving the concealment effect.

This invention provides an in-situ polymerized yarn and its preparation method, relating to the field of yarn textile technology. The preparation method of this in-situ polymerized yarn includes the following steps: S1. Mixing a polymer, solvent colorant, and complexing agent in a specific ratio to obtain a spinning solution; S2. Simultaneously performing electrospinning, carding, and embedding to obtain a colored nanofiber / cotton composite sliver; S3. Drawing and spinning the sliver to produce yarn. By using colored nanofibers composited with a cotton web, the finishing process is eliminated to reduce contamination. The selection of polydimethyldiallyl ammonium chloride as a complexing agent in the spinning solution increases the volume occupied by the cross-linked structure formed by the complexing agent and dye, enhancing the cohesion with the polymer and improving its color fastness.

The invention relates to a light decorative acrylic plate and a preparation method thereof, and relates to the technical field of high polymer materials, the plate is prepared from a methyl methacrylate / polymethyl methacrylate prepolymer, a thermal initiator, a cross-linking agent, a low-boiling-point pore-foaming agent A and a high-boiling-point pore-foaming agent B, and the low-boiling-point pore-foaming agent A and the high-boiling-point pore-foaming agent B are immiscible with a polymerization system; and the phase selective coloring agent is only dissolved in the pore-foaming agent B. The preparation method comprises the following steps: mixing the components to form a multiphase dispersion system; pouring into a mold, then horizontally standing, and enabling the two pore-foaming agents to generate a concentration gradient by utilizing gravity; then programmed heating is carried out, the pore-foaming agent A is gasified to form micropores in the first low-temperature stage, the plate body is cured in the second medium-temperature stage, the pore-foaming agent B is gasified to form macro pores in the third high-temperature stage, and meanwhile the coloring agent is deposited on the inner walls of the macro pores in situ; and finally cooling, demolding and annealing. By means of the process, light weight, three-dimensional gradient texture construction and pore inner wall selective coloring of the board are achieved.

The invention relates to color cosmetic compositions including, in a physiologically acceptable medium, flattened, porous ceramic particles and at least one coloring agent, as well as to methods and kits including such compositions in container(s) or in application.

To provide a water-based ink composition for a writing instrument capable of enhancing drying resistance of a pen tip without reducing drying properties of written lines and to provide a writing instrument incorporating the water-based ink composition.SOLUTION: There is provided a water-based ink composition for a writing instrument which comprises at least a colorant, a water-soluble solvent, a film-forming non-drying agent having a solubility in water of less than 40 g / 100 mL and water, wherein the mole fraction of the film-forming non-drying agent to the water-soluble components in the ink is 0.25 or more. Further, there is provided a writing instrument incorporating the water-based ink composition.SELECTED DRAWING: Figure 1

The invention provides a resin composition as well as a cured film and application thereof. The resin composition comprises alkali-soluble acrylic resin, a photopolymerization monomer, a photoinitiator and a coloring agent, the coloring agent comprises modified TiO2, and the modified TiO2 is TiO2 which is subjected to graft modification by an isocyanate compound and a silane coupling agent. According to the invention, by grafting a small molecule compound with an isocyanate group on the surface of the titanium dioxide, the compatibility of the titanium dioxide is improved, and the crosslinking degree is improved; and the crosslinking degree and the heat resistance are improved through the reaction of isocyanate groups and hydroxyl groups in the system.

The invention discloses a cup-sticking-free and easy-to-detach lipstick and a preparation method thereof. The cup-sticking-free and easy-to-detach lipstick comprises a shape fixing agent, an emollient, a film-forming agent, a coloring agent, a thickening agent, a skin feeling conditioning agent, a preservative, functional components and an aromatic. According to the invention, the use of a sticky resin film-forming agent is avoided, the problem that a film formed on the surface of the paste cannot be smeared due to long-time placement is avoided, and the synthetic wax is selected as the film-forming agent, has good film-forming property, strong adhesion and excellent color fixation performance, and can generate good interaction with a makeup removal product due to the special structure, so that the makeup removal effect is improved. And therefore, disassembly is easier, and no residue exists.

The invention discloses a low-stress epoxy molding compound as well as a preparation method and application thereof. The epoxy molding compound is prepared from 6 to 7.5 parts of epoxy resin, 5 to 8 parts of phenolic resin, 65 to 90 parts of inorganic filler, 0.1 to 1.5 parts of curing accelerator, 0.1 to 5 parts of stress absorbent, 0.1 to 1.5 parts of silane coupling agent, 0.1 to 1.5 parts of flame retardant, 0.1 to 1.5 parts of release agent, 0 to 0.5 part of ion trapping agent, 0.01 to 0.5 part of gas-phase silicon and 0 to 0.5 part of coloring agent, wherein the epoxy resin comprises epoxy resin modified by a flexible organic chain segment compound, and the mass of the epoxy resin is 70-80% of the total mass of the epoxy resin. The epoxy molding compound provided by the invention has the advantages of low expansion and low modulus, and effectively improves the reliability problem of the device caused by the stress effect in the packaging process of the electronic device.

The invention relates to the field of color paste, in particular to color paste for silica gel leather and a preparation method of the color paste. The color paste for the silica gel leather at least comprises the following raw materials in parts by mass: 55-75 parts of film-forming resin, 10-30 parts of a coloring agent, 9-15 parts of a combined reinforcing agent, 3-6 parts of a dispersing agent, 3-10 parts of filler, 2-4 parts of a wetting agent, 3-10 parts of water, 2-10 parts of a thickening agent, 0.3-0.5 part of a defoaming agent, 0.2-0.4 part of an ultraviolet absorbent and 5-10 parts of polymerized emulsion. The finally prepared color paste material not only has excellent pigment dispersibility and compatibility of a silica gel matrix, but also can avoid the use of an organic solvent and avoid greater environmental protection problems, and can finally maintain good stability, storability and other properties, the comprehensive performance is greatly improved, and the color paste material is suitable for industrial production. The higher application performance requirement of the existing silica gel leather on the color paste is effectively met.

The invention belongs to the technical field of photosensitive glass, and discloses colored photosensitive microcrystalline glass and a preparation method and application thereof.The preparation method of the colored photosensitive microcrystalline glass comprises the steps that SiO2, Al2O3, B2O3, Li2O, Na2O, MgO, ZnO, ZrO2, CeO2, Ag2O, Sb2O3, F <->, Cl <->, Br <-> and a clarifying agent are mixed to obtain a mixture, the mixture is sequentially melted, clarified and formed, formed glass is obtained, and the colored photosensitive microcrystalline glass is obtained. And carrying out heat treatment on the formed glass to obtain the colored photosensitive microcrystalline glass. According to the preparation method, a'photosensitizer-colorant-nucleating agent 'decoupling doping strategy is innovatively adopted through component gradient design and a multi-stage heat treatment system, so that color development, crystallization and transparency under different heat treatment systems are realized, and the colored photosensitive microcrystalline glass with a color development function and a photosensitive micro-crystallization characteristic can be prepared.

The invention relates to the field of coloring agents, in particular to a high-tinting-strength color master batch and a preparation method thereof. The high-tinting-strength color master batch is prepared from carrier resin, a coloring agent, a dispersion composition, a heat stabilizer, an ultraviolet light absorber and the like, the high-tinting-strength effect of the high-tinting-strength color master batch can be effectively guaranteed, the problem of uneven dispersion caused by secondary agglomeration of a pigment system can be avoided, and on the other hand, by enhancing the performance of the color master batch, the high-tinting-strength color master batch can be obtained. The heat stability, water resistance, corrosion resistance and the like of the master batch are further improved, the compatibility of the master batch with a plastic system can be greatly improved, and the compatibility problems of layering, segregation, agglomeration and the like are avoided, so that the comprehensive use requirements of the existing industry on the master batch are met, and the master batch has wide application potential.

The present invention relates to a low-color-difference masterbatch and corresponding polyolefin products. The masterbatch is primarily suitable for coloring polyethylene and polypropylene films or injection-molded parts. The present invention uses an epoxidized polyalphaolefin (PAO) with a defined chemical structure as a dispersant. The epoxidized PAO has highly polar epoxy groups and non-polar long carbon chains, providing both dispersing and lubricating properties. This improves the compatibility of the carrier resin and the polar colorant, allowing for more complete melt mixing of the two. This results in lower color difference, more uniform coloring, more stable coloring performance, and bright, streaky-free color when used to color polyolefin products. Furthermore, it prevents yellowing of the polyolefin products at high temperatures.

A composition, and methods of making and using such a composition, whereby the composition can include a printable ink formulation having a colorant which undergoes a visible color change upon exposure to a wetness threshold. The colorant can be highly resistant to leaching. Additionally, the colorant can be resistant to premature activation via ambient moisture or humidity.

Deionized water, glycerin, an antioxidant and a preservative are fully mixed to prepare a mixed solution, and hydrophobic silane modified silicon dioxide and the mixed solution are fully mixed in a high-speed powder stirring homogenizer to prepare mixed powder A; adding fluorophlogopite and a coloring agent into a high-speed powder stirring homogenizer, and fully mixing to obtain mixed powder B; then the mixed powder A and the mixed powder B are fully mixed to prepare the make-up powder with the particle size not exceeding 500 meshes, the make-up powder is fine and light in particle size, and the make-up skin is soft and fine in touch. The makeup powder has high fluidity and can be contained in the bottle body, the makeup powder is sprayed out through the spray head by utilizing the pressure difference inside and outside the bottle body, and the makeup applying mode is novel and convenient; in addition, the powder has the characteristic of high covering power, and after the sprayed powder is simply smeared for multiple times for makeup, the color difference of the part covered by the makeup powder is small, so that the makeup effect with a good covering effect is formed.

To provide a biosensor and a light detection device allowing a film having excellent light-shielding properties to be patterned with high resolution and high aspect ratio and exhibiting high-resolution.SOLUTION: There are provided a photosensitive composition used for a light detection device, the composition containing a colorant precursor exhibiting light absorptivity upon stimulation, and a transfer film, a laminate, a method for producing the laminate, and a light detection device, each obtained using the photosensitive composition.SELECTED DRAWING: None

The embodiment of the utility model provides fiber coloring equipment, and relates to the technical field of fiber coloring. The fiber coloring equipment comprises a first container device, an air pressure adjusting assembly and a first switch valve. The first container device is internally provided with a first cavity, and the first cavity is used for loading a hollow fiber material and a liquid coloring agent so that the coloring agent can immerse the hollow fiber material; the first container device is further provided with a first communication opening, the first communication opening is communicated with the first cavity, the first communication opening is connected with one end of a first switch valve, and the other end of the first switch valve is used for being connected with a coloring agent storage device. The air pressure adjusting assembly is connected with the first container device and used for adjusting the air pressure in the first cavity so that the air pressure in the first cavity can be converted between the positive pressure and the negative pressure. In this way, the inner cavity of the tubular hollow fiber can be filled with the coloring agent conveniently, so that all positions of the inner cavity of the tubular hollow fiber can be colored conveniently.