CN118727175A - A method and device for manufacturing microcapsule fiber - Google Patents

Abstract

The present invention relates to the technical field of microcapsule fibers, and provides a method for manufacturing microcapsule fibers and equipment thereof, including an equipment body, wherein a stand is arranged inside the equipment body, a material tank for storing a polymerization solution is arranged inside the upper end of the equipment body, a spinneret for producing silk threads is arranged on one side of the equipment body adjacent to the upper end, a spinneret is arranged inside the spinneret, and a winding roller is also arranged inside the spinneret; a capsule storage box for storing microcapsules is arranged on one side of the top of the equipment body, and a receiving hopper for receiving microcapsules is arranged at the upper end of the capsule storage box. The present invention wraps functional materials with microcapsule particles to form a protective shell, which can maintain its active characteristics and mix with the polymerization solution, and then produce microcapsule fibers through spinning, which are not affected by low-temperature solvents and high temperatures in existing spinning methods, strengthen the mechanical strength of fiber materials, and thus improve the quality of products.

Description

A method and device for manufacturing microcapsule fiber

Technical Field

The present invention relates to the field of microcapsule fibers, and more specifically, to a method for manufacturing microcapsule fibers and equipment thereof.

Background Art

Fiber refers to a substance composed of continuous or discontinuous filaments. These filaments can be naturally present or made by chemical or physical methods. It is an extremely important basic material with a wide range of uses. It can be woven into threads, fabrics and other fabrics, and can also be used for papermaking, felting, and other layered structures. It can also be combined with other materials to form composite materials. Fiber is not only related to people's food, clothing, housing and transportation, but even in animals and plants, fiber plays a vital role in maintaining tissues, forming blood vessels, muscles, or covering tissues.

With the progress of society and the development of science and technology, production and life have put forward higher requirements for fiber materials. Fibers with a single function can no longer meet the needs of modern use. Various fibers with multiple functions, such as antibacterial, anti-mite, flame retardant, heat preservation, heat insulation, far infrared, magnetic, environmental responsiveness, etc., have appeared one after another. Usually, various functional materials are added to the fiber production to give the fiber various functions.

At present, the existing spinning methods are divided into wet spinning and melt spinning. The wet spinning temperature is lower, but a large amount of solvent is used. Melt spinning does not use solvents, but the spinning process requires a high temperature process. If functional materials are directly added to this process, they will be affected by solvents or high temperatures, and the function will be greatly lost. Most functional materials are active in nature. Even if they are added to fibers, there will be problems with the fiber substrate. This will lead to a decrease in the original mechanical strength of the fiber material, an increase in structural defects, and a great impact on practicality and processability.

In order to solve the above problems, the present application proposes a method for manufacturing microcapsule fibers and an apparatus thereof.

Summary of the invention

The object of the present invention is to provide a method and equipment for manufacturing microcapsule fibers, which are produced by fusing microcapsules with functional materials and fibers to solve the problems in the prior art.

The purpose of the present invention can be achieved through the following technical solutions:

A method for producing microcapsule fibers comprises the following steps:

S1: mixing a silicon precursor, a phase change material, a photoinitiator and a diisocyanate to obtain an oil phase;

S2: adding surfactant to deionized water to obtain an aqueous phase;

S3: mixing and emulsifying the oil phase and the water phase to obtain a uniform emulsion;

S4: adding aqueous acrylate monomer to the emulsion and irradiating with UV light for 5-300 min;

S5: heating up in stages, adding 1/3 curing agent, keeping warm at 50-60°C for 1h to 3h; adding 1/3 curing agent, keeping warm at 60-70°C for 1h to 3h; adding 1/3 curing agent, keeping warm at 70-80°C for 1h to 3h; adding 1/3 curing agent, keeping warm at 80-90°C for 1h to 3h; then separating, washing and drying in sequence to obtain phase change microcapsules;

S6: the phase change microcapsules and the polymer melt are mixed and granulated through a screw extruder, the obtained granules are further melted, stretched and spun through a spinneret, and shaped to obtain polymer fibers containing microcapsules;

S7: Further, the obtained phase change microcapsules are mixed with a polymer solution, and then passed through a spinneret to be solidified and formed to obtain polymer fibers containing microcapsules.

Preferably, the microcapsule fiber is a material obtained by spinning after mixing microcapsules with a polymer solution. The microcapsules embed solids, liquids and gases in tiny and sealed capsules so that they are released at a controlled rate only under specific conditions.

Preferably, the particle size of the microcapsule is less than or equal to the radius of the fiber; in some embodiments, the particle size D50 of the microcapsule (indicating that 50% of the microcapsules are less than or equal to this value) has a size range of ≤5 microns; further, the particle size D50 of the microcapsule is ≤2.00 microns; further, the particle size of the microcapsule is 1-2 microns; by controlling the particle size of the microcapsule, it can be ensured that it can effectively wrap the functional material and achieve good fusion with the fiber substrate, thereby improving the overall performance of the fiber.

A manufacturing device for microcapsule fiber comprises a device body, a stand is arranged inside the device body, a material tank for storing polymerization solution is arranged inside the upper end of the device body, a spinneret for producing silk thread is arranged on one side of the device body adjacent to the upper end, a spinneret plate is arranged inside the spinneret, and a winding roller is also arranged inside the spinneret; a capsule storage box for storing microcapsules is arranged on one side of the top of the device body, a receiving hopper for receiving microcapsules is arranged on the upper end of the capsule storage box, the microcapsules wrap functional materials inside to prevent them from being affected by solvents and high temperatures, a mixing tank for uniformly mixing polymerization solution and microcapsules is arranged inside the upper end of the device body, a support frame connected and fixed to the stand is arranged at the lower end of the mixing tank, a wire distribution frame for uniformly distributing silk thread is arranged inside the spinneret, and more preferably, the protruding plate mechanisms on both sides of the wire distribution frame are also used to locate its installation depth, so that the wire distribution frame can be directly placed inside the spinneret, which can play the effect of locating the placement position of its internal components.

Preferably, a feed pipe for conveying the polymerization solution is provided at the lower end of the material tank, and a guide pipe for conveying microcapsules is provided at the lower end of the capsule storage box. The feed pipe and the guide pipe are respectively connected to both sides of the upper end of the mixing tank. More preferably, the two materials are conveyed together to achieve the effect of quantitative proportioning, saving costs while controlling the production quality of microcapsule fibers.

Preferably, the outer side of the feed pipe and the feed guide pipe adjacent to the mixing tank is provided with a meter for controlling the material delivery amount, and the bottom side of the mixing tank is provided with a feed pipe for outputting the mixed solution to the outside. More preferably, the meter is used for the operator to timely grasp the ratio of the two materials, so as to facilitate the regulation of the production data of the microcapsule fiber.

Preferably, a rotating motor for enhancing the mixing efficiency of the polymer solution and the microcapsules is provided at the upper end of the mixing tank, and a stirring blade is provided on the outer side of the lower end of the rotating shaft of the rotating motor. More preferably, the stirring blade is used to accelerate the mixing of the two materials to improve its working efficiency.

Preferably, the first drainage tube and the second drainage tube are respectively connected to the discharge tube and the guide tube on both sides of the interior of the mixing tank. The lower ends of the first drainage tube and the second drainage tube are connected to form a mixing tube for pre-mixing the materials. More preferably, the two materials are gathered to prevent them from dispersing each other and causing the falling materials to be directly discharged. Secondly, the mixing efficiency can be greatly improved.

Preferably, a sleeve for wrapping the rotating motor is provided inside the mixing tube, and overflow pipes for overflow of mixed materials are provided on both sides of the mixing tube. More preferably, the sleeve passes through the mixing tube to wrap the rotating shaft, and is also used to reduce its vibration amplitude to avoid the situation where the rotating shaft is too long and the strong vibration affects the stability of the equipment.

Preferably, the interior of the wire dividing frame is layered from top to bottom with a first wire dividing plate, a wire dividing roller and a second wire dividing plate for layering the wires. The first wire dividing plate, the wire dividing roller and the second wire dividing plate are evenly arranged from left to right to form a staggered distribution. More preferably, the first wire dividing plate is located at the upper left, the second wire dividing plate is located at the lower right, and the wire dividing roller is located in the middle of the two, thereby the three rows of wires sprayed out of the spinneret can be limited and sorted separately.

Preferably, a second oblique wire guide groove and a first oblique wire guide groove for laterally guiding the wire are respectively provided on the outer sides of the first wire dividing plate and the second wire dividing plate, and the inclination direction of the second oblique wire guide groove is opposite to that of the first oblique wire guide groove. More preferably, the wires are evenly dispersed on both sides of the middle row of wires after passing through the conductor, and cross each other to form a uniform distribution.

Preferably, a wire separation shaft for separating and arranging the wires pulled outward is provided on one side of the upper end of the wire separation frame, a positioning groove for positioning the wire conveying path is provided inside the wire separation shaft, and connecting plates for connecting and fixing to the wire separation frame are provided at both ends of the wire separation shaft.

Beneficial effects of the present invention:

The present invention disperses the prepared microcapsules in a polymer solution or a polymer melt used in fiber manufacturing, passes through a spinneret, and undergoes a spinning process to obtain a fiber material containing microcapsules, wherein the microcapsule material imparts various functions to the fiber, effectively avoiding the influence of wet spinning and melt spinning on the functional material, so that the produced fiber has a stable mechanical structure and improves its practical performance;

The present invention connects the first drainage tube and the second drainage tube to the mixing tube, so that the microcapsules and the polymer solution can be directly mixed, and then further mixed and stirred by the stirring blade. At this time, the functional materials are uniformly mixed with the polymer solution through the microcapsules, so that the function of the produced fiber is stable and the local function loss is avoided, thereby ensuring the production quality.

The present invention separates and arranges the ejected silk threads through a silk separation frame and its components, so that the silk threads can be evenly connected to the winding roller, effectively avoiding the aggregation of the silk threads, allowing the silk threads to be fully mixed with the external solution, avoiding the situation where the accumulated area cannot fully contact and react with the external solution, thereby stabilizing the production process of the silk threads and improving product quality.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

FIG1 is a schematic diagram of a scanning electron microscope (SEM) photograph of microcapsules in the present invention;

FIG2 is a schematic diagram of a particle size distribution curve of microcapsules in the present invention;

FIG3 is a schematic diagram of DSC testing of phase change viscose fiber in the present invention;

FIG4 is a schematic diagram of a DSC test of a phase change lyocell fiber in the present invention;

FIG5 is a schematic diagram of a DSC test of a phase change polyester fiber in the present invention;

FIG6 is a schematic diagram of a cross-section of a lyocell fiber to which microcapsules are added according to the present invention;

FIG7 is a schematic diagram of a cross-section of viscose fiber to which microcapsules are added according to the present invention;

FIG8 is a schematic diagram of the test results of the microcapsules produced in the present invention;

FIG9 is a schematic diagram of the overall appearance structure of the present invention;

FIG10 is a schematic diagram of the internal structure of one end of the device body of the present invention;

FIG11 is a schematic diagram of the structure of a mixing tank in the present invention;

FIG12 is a schematic diagram of the internal structure of the mixing tank of the present invention;

13 is a schematic diagram of the structure of the connection between the rotating shaft of the rotating motor and the mixing pipe in the present invention;

Fig. 14 is a schematic diagram of the structure of the spinneret in the present invention;

Fig. 15 is a schematic diagram of the internal structure of the spinneret in the present invention;

FIG16 is a schematic diagram of the planar structure of one end of the wire separation frame of the present invention;

In the accompanying drawings, the components represented by the reference numerals are listed as follows:

In the figure: 1. Equipment body; 2. Capsule storage box; 3. Mixing tank; 4. Wire separation rack;

101, stand; 102, material tank; 103, spinneret; 104, spinneret plate; 105, winding roller;

1021, feeding pipe;

201, receiving hopper; 202, material guide pipe; 203, metering device;

301, feed pipe; 302, support frame; 303, rotating motor; 304, stirring blade; 305, first drainage pipe; 306, second drainage pipe; 307, mixing pipe; 308, sleeve; 309, overflow pipe;

401, wire-dividing roller; 402, first wire-dividing plate; 403, second wire-dividing plate; 404, wire-dividing shaft; 405, first oblique wire-guiding groove; 406, second oblique wire-guiding groove; 407, connecting plate; 408, positioning groove.

DETAILED DESCRIPTION

In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

A method for producing microcapsule fibers comprises the following steps:

S1: mixing a silicon precursor, a phase change material, a photoinitiator and a diisocyanate to obtain an oil phase;

S2: adding surfactant to deionized water to obtain an aqueous phase;

S3: mixing and emulsifying the oil phase and the water phase to obtain a uniform emulsion;

S4: adding aqueous acrylate monomer to the emulsion and irradiating with UV light for 5-300 min;

S5: heating up in stages, adding 1/3 curing agent, keeping warm at 50-60°C for 1h to 3h; adding 1/3 curing agent, keeping warm at 60-70°C for 1h to 3h; adding 1/3 curing agent, keeping warm at 70-80°C for 1h to 3h; adding 1/3 curing agent, keeping warm at 80-90°C for 1h to 3h; then separating, washing and drying in sequence to obtain phase change microcapsules;

S6: the phase change microcapsules and the polymer melt are mixed and granulated through a screw extruder, the obtained granules are further melted, stretched and spun through a spinneret, and shaped to obtain polymer fibers containing microcapsules;

S7: Furthermore, the obtained phase change microcapsules can be mixed with a polymer solution, passed through a spinneret, and solidified to obtain polymer fibers containing microcapsules.

It should be further explained that the silicon precursor described in S1 is at least one organic silicon compound selected from the group consisting of chlorine, fatty alkyl, phenyl, vinyl, amino, cyano, glycidoxy, methacryloxy and mercapto;

The phase change material is one of fatty amines, fatty acid esters, and normal alkanes, and is preferably at least one selected from dodecylamine, tetradecylamine, hexadecylamine, octadecylamine, dodecyl decanoate, dodecyl laurate, tetradecyl myristate, hexadecyl palmitate, n-hexadecane, n-octadecane, and n-eicosane;

The diisocyanate is at least one of toluene diisocyanate (TD I), diphenylmethane diisocyanate (MD I), hexamethylene diisocyanate (HD I), isophorone diisocyanate (IPD I), and dicyclohexylmethane-4,4'-diisocyanate (HMD I);

The total mass of the surfactant described in S2 is 1% to 10% of the oil phase; it is selected from at least one of the following: hydrolyzate of vinyl methyl ether-maleic anhydride copolymer, hydrolyzate of isobutylene-maleic anhydride copolymer, hydrolyzate of styrene-maleic anhydride copolymer, hydrolyzate of ethylene-maleic anhydride copolymer, gum arabic, gelatin, polyvinyl alcohol, emulsifier OP, emulsifier Span, and emulsifier Tween;

The water-based acrylate described in S4 is selected from polyethylene glycol diacrylate; further, the microcapsule shell forms a complex network structure of polyurethane + silica + polyacrylate, and the sum of the masses of the three is 5% to 50% of the core phase change material;

The polymer described in S6 includes at least one of polyethylene, polypropylene, polystyrene, polyester (including PET, PBT, PPT), polycarbonate, polyamide, polyolefin, polylactic acid or a derivative thereof;

The polymer solution described in S7 includes at least one of a cellulose solution, a polyvinyl alcohol solution, an acrylonitrile solution, and an N,N-dimethylformamide (DMF) or N,N-dimethylacetamide (DMAc) solution of a polyurethane prepolymer.

Among them, microcapsule fiber is a material made by spinning after mixing microcapsules and polymer solutions. The microcapsules encapsulate solids, liquids and gases in tiny and sealed capsules, so that they will only be released at a controlled rate under specific conditions.

Among them, the particle size of the microcapsule is less than or equal to the radius of the fiber; in some embodiments, the particle size D50 of the microcapsule (indicating that 50% of the microcapsule size is less than or equal to this value) has a size range of ≤5 microns; further, the particle size D50 of the microcapsule is ≤2.00 microns; further, the particle size of the microcapsule is 1-2 microns; by controlling the particle size of the microcapsule, it can be ensured that it can effectively wrap the functional material and achieve good fusion with the fiber substrate, thereby improving the overall performance of the fiber.

Example 1

S1: 48 g of dodecylamine, 12 g of n-octadecane, 6 g of tetraethyl orthosilicate, 0.15 g of photoinitiator photoinitiator 184 and 4 g of MDI were mixed to obtain an oil phase;

S2: Add 10 g of surfactant polyvinyl alcohol PVA1699 to 100 g of deionized water to completely dissolve it to obtain an aqueous phase.

S3: The oil phase and the water phase are mixed and emulsified at a high speed of 12000 rpm to obtain a uniform emulsion;

S4: 8 g of polyethylene glycol 400 diacrylate was added dropwise to the emulsion and irradiated with UV light for 15-30 min;

S5: heating up in stages, adding 0.5g ethylenediamine and 1g triethylenetetramine, keeping the temperature at 50℃ for 1h; adding 0.5g ethylenediamine and 1g triethylenetetramine, keeping the temperature at 65℃ for 2h; adding 0.5g ethylenediamine and 1g triethylenetetramine, keeping the temperature at 75℃ for 2h; keeping the temperature at 85℃ for 1h. Then separating, washing and drying to obtain phase change microcapsules;

As shown in Figure 1 of the specification, it is a scanning electron microscope SEM photograph of the obtained microcapsules, and the microcapsules are relatively round and spherical;

As shown in Figure 2 of the specification, the particle size distribution curve of the obtained microcapsules, the particle size D50 is 1.879 microns, which is more suitable for spinning;

S6: uniformly mixing the obtained phase change microcapsules with the cellulose solution, wherein the ratio of the phase change microcapsules to the cellulose is 1:9. Passing through a spinneret, solidifying and forming, a viscose fiber containing the phase change microcapsules is obtained;

As shown in Figure 3 of the specification, the DSC test of the obtained phase change viscose fiber shows that its phase change melting enthalpy value is 16.733 J/g.

Example 2

S1: 48 g of dodecylamine, 12 g of n-octadecane, 4.5 g of methacryloyl hydrocarbyl silane, 0.15 g of photoinitiator photoinitiator 184 and 4 g of MDI were mixed to obtain an oil phase;

S2: Add 10 g of surfactant styrene maleic anhydride hydrolyzate to 100 g of deionized water to obtain an aqueous phase.

S3: The oil phase and the water phase are mixed and emulsified at a high speed of 12000 rpm to obtain a uniform emulsion;

S4: 8 g of polyethylene glycol 400 diacrylate was added dropwise to the emulsion and irradiated with UV light for 15-30 min;

S5: heating up in stages, adding 0.5g triethylamine and 1g diethylenetriamine, keeping the temperature at 60℃ for 1h; adding 0.5g ethylenediamine and 1g triethylenetetramine, keeping the temperature at 75℃ for 2h; adding 0.5g ethylenediamine and 1g triethylenetetramine, keeping the temperature at 85℃ for 2h; keeping the temperature at 95℃ for 1h. Then separating, washing and drying to obtain phase change microcapsules.

S6: uniformly mixing the obtained microcapsules with the cellulose NMMO solution, wherein the ratio of the phase change microcapsules to the cellulose is 4:6. Passing through a spinneret, solidifying and forming, to obtain a lyocell fiber containing the phase change microcapsules;

As shown in Figure 4 of the specification, the DSC test of the obtained phase-change lyocell fiber shows that its phase-change melting enthalpy value is 51.302 J/g.

Example 3

S1: 36 g of tetradecylamine, 24 g of n-octadecane, 4 g of hexadecyltrimethoxysilane, 0.15 g of photoinitiator photoinitiator 1173 and 8 g of IPD I were mixed to obtain an oil phase;

S2: Add 5 g of surfactant ethylene maleic anhydride hydrolyzate to 100 g of deionized water to obtain an aqueous phase.

S3: The oil phase and the water phase are mixed and emulsified at a high speed of 12000 rpm to obtain a uniform emulsion;

S4: 4 g of polyethylene glycol 400 diacrylate was added dropwise to the emulsion and irradiated with UV light for 15-30 min;

S5: heating in stages, adding 0.1g dibutyltin dilaurate and 2g triethylenetetramine, keeping the temperature at 50°C for 1h; adding 0.1g dibutyltin dilaurate and 2g triethylenetetramine, keeping the temperature at 65°C for 2h; adding 0.1g dibutyltin dilaurate and 2g triethylenetetramine, keeping the temperature at 75°C for 2h; keeping the temperature at 85°C for 1h. Then separating, washing and drying to obtain phase change microcapsules.

S6: blending the obtained phase change microcapsules with polybutylene terephthalate, wherein the ratio of the phase change microcapsules to cellulose is 1:9, and granulating them by a twin-screw extruder at 260-330° C. The obtained granules are passed through a spinneret and solidified to obtain polyester fibers containing phase change microcapsules;

As shown in Figure 5 of the specification, the DSC test of the obtained phase change polyester fiber shows that its phase change melting enthalpy value is 15.584 J/g.

As shown in Figures 6-7 of the specification, the electron scanning microscope cross-sectional views of the prepared fiber material, the cross-sectional view of the ordinary fiber is flat and smooth, Figure 6 of the specification is a cross-sectional view of the lyocell fiber with added microcapsules, and Figure 7 of the specification is a cross-sectional view of the viscose fiber with added microcapsules. It can be seen that the microcapsule fiber prepared in this scheme has many holes, and the diameter of these holes is consistent with the diameter of the microcapsules.

Please refer to Figure 9 for details: A manufacturing device for microcapsule fibers includes a device body 1, a stand 101 is arranged inside the device body 1, the stand 101 connects various components inside the device body 1, and a material tank 102 for storing a polymerization solution is arranged inside the upper end of the device body 1 to support the fixing mechanism, a spinneret 103 for producing silk threads is arranged on one side adjacent to the upper end of the device body 1, a spinneret 104 is arranged inside the spinneret 103, the spinneret 104 is a spinneret mechanism with upper, middle and lower layers, and the sprayed silk is divided into three layers of upper, middle and lower layers, and a winding roller 105 is also arranged inside the spinneret 103.

Please continue to refer to Figures 9-10: A capsule storage box 2 for storing microcapsules is set on one side of the top of the equipment body 1. The produced microcapsules are stored to prevent contact with external oxygen and other substances to maintain the functional stability of the microcapsule particles. A receiving hopper 201 for receiving microcapsules is set on the upper end of the capsule storage box 2. The microcapsules wrap the functional materials inside to maintain the active properties of the functional materials to prevent them from being affected by solvents and high temperatures. A mixing tank 3 for uniformly mixing the polymerization solution and the microcapsules is set inside the upper end of the equipment body 1, and a support frame 302 fixedly connected to the stand 101 is set at the lower end of the mixing tank 3. A wire distribution frame 4 for uniformly distributing the silk threads is set inside the spinneret 103.

Please continue to refer to Figure 10: the lower end of the material tank 102 is provided with a feed pipe 1021 for conveying the polymerization solution, and the lower end of the capsule storage box 2 is provided with a guide pipe 202 for conveying microcapsules. The feed pipe 1021 and the guide pipe 202 are respectively connected to both sides of the upper end of the mixing tank 3.

Please continue to refer to Figures 10-13: The outer side of the feed pipe 1021 and the guide pipe 202 adjacent to the mixing tank 3 is provided with a metering device 203 for controlling the material delivery amount. The metering device 203 is connected to an external control device and can grasp the delivery information of the internal material in real time to control the ratio of the two materials. A delivery pipe 301 is provided on one side of the bottom of the mixing tank 3 for outputting the mixed solution to the outside.

Please continue to refer to Figures 11-12: A rotating motor 303 for enhancing the mixing efficiency of the polymer solution and the microcapsules is disposed at the upper end of the mixing tank 3, and a stirring blade 304 is disposed on the outer side of the lower end of the rotating shaft of the rotating motor 303.

Please continue to refer to Figure 12: The first drainage pipe 305 and the second drainage pipe 306 are respectively connected to the discharge pipe 1021 and the guide pipe 202 on both sides of the mixing tank 3. The lower ends of the first drainage pipe 305 and the second drainage pipe 306 are connected to form a mixing pipe 307 for pre-mixing materials. The pre-mixing of materials can greatly reduce the subsequent mixing time, thereby improving work efficiency, and at the same time avoid the situation where the injected materials are directly discharged.

Please continue to refer to Figures 12-13: The interior of the mixing tube 307 is provided with a sleeve 308 for wrapping the rotating motor 303, and overflow pipes 309 are provided on both sides of the mixing tube 307 for the overflow of the mixed materials. The overflow pipe 309 has a slightly smaller diameter and is also used to further gather the two materials to form a mixture.

Please continue to refer to Figures 14-15: The interior of the wire dividing frame 4 is layered from top to bottom with a first wire dividing plate 402, a wire dividing roller 401 and a second wire dividing plate 403 for dividing the wires into layers. The first wire dividing plate 402 is connected to the wires located in the upper layer, and the second wire dividing plate 401 is connected to the wires located in the lower layer. The first wire dividing plate 402, the wire dividing roller 401 and the second wire dividing plate 403 are evenly arranged from left to right to form a staggered distribution.

Please continue to refer to Figures 14-16: the outer sides of the first wire dividing plate 402 and the second wire dividing plate 403 are respectively provided with a second oblique wire guide groove 406 and a first oblique wire guide groove 405 for laterally guiding the wires. The second oblique wire guide groove 406 is inclined in the opposite direction to the first oblique wire guide groove 405. After the wires of the upper and lower layers are guided respectively, each wire is located on both sides of the wire at the corresponding middle layer position to form a uniform arrangement.

Please continue to refer to Figures 15-16: A wire dividing shaft 404 is provided on one side of the upper end of the wire dividing frame 4 for separating and arranging the wires pulled outward, and a positioning groove 408 is provided inside the wire dividing shaft 404 for positioning the wire conveying path. The positioning groove 408 is used to prevent the wires from being scattered when being pulled outward, and is convenient for subsequent processing. Connecting plates 407 are provided at both ends of the wire dividing shaft 404 for connecting and fixing to the wire dividing frame 4.

It can be understood that the present invention wraps functional materials with microcapsule particles to form a protective shell, which can maintain its active properties and mix with the polymerization solution, and then produce microcapsule fibers through spinning. It is not affected by the low-temperature solvents and high temperatures in the existing spinning methods, and the mechanical strength of the fiber material is enhanced, thereby improving the quality of the product.

The working principle of the present invention is:

First, the existing spinning methods are wet spinning (dissolving the polymer in a certain solvent, then spraying the solution through a spinneret, volatilizing the solvent, and the dissolved matter therein forms thin fibers, which are then stretched, shaped, coiled, oiled, and wound) and melt spinning (heating the polymer directly to above its melting point to melt it and turn it into a liquid, then spraying it through a spinneret and cooling it to shape it into fibers, which are then stretched, shaped, oiled, and wound). In order to prevent the functional materials added to the fibers from being affected by low temperature, solvent, and high temperature, a process for spinning production by encapsulating the functional materials in microcapsules has been developed, and its operation process is as follows;

The polymer solution and microcapsules are released together through the material tank 102 and the capsule storage box 2. The two materials are guided by the first drainage pipe 305 and the second drainage pipe 306 and gathered in the mixing pipe 307 to form a pre-mixed mixture. Then, they overflow from the overflow pipe 309 and are stirred by the stirring blade 304 to make the two materials evenly mixed together. Then, they flow to the spinneret 104 through the feed pipe 301 and are sprayed into a wire. At this time, the wire separation roller 401, the first wire separation plate 402, and the second wire separation plate 403 are used to hold the wire in layers so that it passes through the first inclined wire guide groove 405 to form a wire. After being guided by the second oblique wire guide groove 406, a staggered distribution structure is formed. Subsequently, three rows of silk threads are connected to the winding roller 105 side by side, and adjacent silk threads are kept at a certain distance, so that the silk threads in the bottom area can fully contact and react with the external solution to improve its process quality. Finally, the positioning groove 408 on the outside of the wire dividing shaft 404 can be used to evenly disperse the silk threads pulled outward. After this arrangement, the functional materials can be fully mixed into the limit to avoid being affected by solvents or high temperatures, so that the produced fibers have a stable mechanical structure and the quality of the fibers is maintained.

In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "around" and the like indicate orientation or positional relationship, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A method of making a microcapsule fiber comprising the steps of:

S1: mixing a silicon precursor, a phase change material, a photoinitiator and diisocyanate to obtain an oil phase;

s2: adding a surfactant into deionized water to obtain a water phase;

s3: mixing the oil phase and the water phase, and emulsifying to obtain uniform emulsion;

S4: dripping water-based acrylic ester monomer into the emulsion, and irradiating for 5-300min by UV light;

S5: heating in sections, adding 1/3 curing agent, and preserving heat for 1-3 h at 50-60 ℃; adding 1/3 curing agent, and preserving heat for 1-3 h at 60-70 ℃; adding 1/3 curing agent, and preserving heat for 1-3 h at 70-80 ℃; adding 1/3 curing agent, and preserving heat for 1-3 h at 80-90 ℃; then separating, washing and drying in sequence to obtain the phase-change microcapsule;

S6: mixing the phase-change microcapsule and polymer melt through a screw extruder, granulating, further melting the obtained granules, stretching and spinning through a spinneret plate, and shaping to obtain polymer fibers containing the microcapsule;

S7: further, the obtained phase-change microcapsule is mixed with a polymer solution, and then solidified and formed through a spinneret plate, so that the polymer fiber containing the microcapsule is obtained.

2. A method of manufacturing a microcapsule fiber according to claim 1, characterized in that: microcapsule fibers are materials in which microcapsules are mixed with a polymerization solution and then spun, and the microcapsules embed solids, liquids, and gases in tiny, sealed capsules that are released at a controlled rate only under specific conditions.

3. A method of manufacturing a microcapsule fiber according to claim 1, characterized in that: the microcapsule has a size of 1-2 μm and a radius smaller than or equal to the fiber.

4. A microcapsule fiber manufacturing apparatus for producing a microcapsule fiber according to claim 1, characterized in that:

The spinning machine comprises a machine body (1), wherein a rack (101) is arranged in the machine body (1), a material tank (102) for storing a polymerization solution is arranged in the upper end of the machine body (1), a spinning box (103) for producing silk threads is arranged on one side, close to the upper end, of the machine body (1), a spinneret plate (104) is arranged in the spinning box (103), and a winding roller (105) is arranged in the spinning box (103);

The device is characterized in that a capsule storage box (2) for storing microcapsules is arranged on one side of the top of the device body (1), a receiving hopper (201) for receiving the microcapsules is arranged at the upper end of the capsule storage box (2), the microcapsules wrap functional materials in the device body to prevent the microcapsules from being influenced by solvents and high temperature, a mixing tank (3) for evenly mixing a polymerization solution with the microcapsules is arranged inside the upper end of the device body (1), a supporting frame (302) fixedly connected with a rack (101) is arranged at the lower end of the mixing tank (3), and a yarn dividing frame (4) for evenly distributing silk yarns is arranged inside the yarn spraying box (103).

5. The apparatus for producing microcapsule fiber according to claim 4, wherein: the lower extreme of material jar (102) is provided with unloading pipe (1021) that carries polymeric solution, the lower extreme of capsule bin (2) is provided with passage (202) that are used for carrying the microcapsule, unloading pipe (1021) and passage (202) are connected in the upper end both sides of compounding jar (3) respectively, the one end outside that unloading pipe (1021) and passage (202) are adjacent compounding jar (3) all is provided with meter (203) that are used for controlling the material conveying amount, bottom one side of compounding jar (3) is provided with conveying pipeline (301) that are used for outwards exporting the solution after mixing.

6. The apparatus for producing microcapsule fiber according to claim 4, wherein: the upper end of the mixing tank (3) is provided with a rotating motor (303) for enhancing the mixing efficiency of the polymerization solution and the microcapsules, and the outer side of the lower end of a rotating shaft of the rotating motor (303) is provided with stirring blades (304).

7. The apparatus for producing microcapsule fiber according to claim 4, wherein: the inside both sides of compounding jar (3) are provided with first drainage tube (305) and second drainage tube (306) of butt joint unloading pipe (1021) and passage (202) respectively, the lower extreme butt joint of first drainage tube (305) and second drainage tube (306) forms material pre-mixing's compounding pipe (307), its characterized in that: the inside of compounding pipe (307) is provided with sleeve pipe (308) that are used for parcel rotating electrical machines (303), the both sides of compounding pipe (307) are provided with flash pipe (309) that are used for the mixed material to spill over.

8. The apparatus for producing microcapsule fiber according to claim 4, wherein: the inside of branch silk frame (4) is provided with first branch silk board (402), branch silk roller (401) and second branch silk board (403) that are used for layering the silk thread from top to bottom layering, first branch silk board (402), branch silk roller (401) and second branch silk board (403) are from left to right evenly arranged to form dislocation distribution.

9. The apparatus for producing microcapsule fiber according to claim 8, wherein: the outer side positions of the first yarn dividing plate (402) and the second yarn dividing plate (403) are respectively provided with a second oblique yarn guiding groove (406) and a first oblique yarn guiding groove (405) for guiding the yarn laterally, and the inclination directions of the second oblique yarn guiding groove (406) and the first oblique yarn guiding groove (405) are opposite.

10. The apparatus for producing microcapsule fiber according to claim 4, wherein: the yarn dividing device is characterized in that a yarn dividing shaft (404) used for dividing and arranging outwards-drawn yarns is arranged on one side of the upper end of the yarn dividing frame (4), a positioning groove (408) used for positioning a yarn conveying path is formed in the yarn dividing shaft (404), and connecting frame plates (407) used for being connected and fixed with the yarn dividing frame (4) are arranged at two ends of the yarn dividing shaft (404).