CN115559052A - Preparation method of underwear fabric compounded with nano antibacterial fibers and electrostatic spinning device - Google Patents
Preparation method of underwear fabric compounded with nano antibacterial fibers and electrostatic spinning device Download PDFInfo
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- CN115559052A CN115559052A CN202211328744.7A CN202211328744A CN115559052A CN 115559052 A CN115559052 A CN 115559052A CN 202211328744 A CN202211328744 A CN 202211328744A CN 115559052 A CN115559052 A CN 115559052A
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- 239000004744 fabric Substances 0.000 title claims abstract description 90
- 239000000835 fiber Substances 0.000 title claims abstract description 70
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- 238000010041 electrostatic spinning Methods 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 238000009987 spinning Methods 0.000 claims abstract description 153
- 230000007246 mechanism Effects 0.000 claims abstract description 60
- 239000002131 composite material Substances 0.000 claims abstract description 16
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- 238000000034 method Methods 0.000 claims abstract description 14
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- 238000010438 heat treatment Methods 0.000 claims description 4
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Images
Classifications
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
- D04B1/14—Other fabrics or articles characterised primarily by the use of particular thread materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/16—Drying; Softening; Cleaning
- B32B38/162—Cleaning
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0015—Electro-spinning characterised by the initial state of the material
- D01D5/003—Electro-spinning characterised by the initial state of the material the material being a polymer solution or dispersion
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4326—Condensation or reaction polymers
- D04H1/435—Polyesters
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
- D04H1/728—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by electro-spinning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/21—Anti-static
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
- B32B2307/7145—Rot proof, resistant to bacteria, mildew, mould, fungi
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/726—Permeability to liquids, absorption
- B32B2307/7265—Non-permeable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/73—Hydrophobic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2437/00—Clothing
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
The invention discloses a preparation method of underwear fabric compounded with nano antibacterial fibers, which comprises the steps of spinning a first spinning solution and a second spinning solution on the surface of a base fabric layer through electrostatic spinning to be sequentially spun on the surface of the base fabric layer so as to form a double-layer nano fiber film, and then compounding a fabric layer on the surface of a second nano antibacterial fiber layer by adopting a hot pressing process to form the underwear fabric compounded with the nano antibacterial fibers; according to the invention, the antibacterial performance of the composite fabric can be obviously improved under the compounding effect of the castor oil and the echinacea purpurea extract, and the composite fabric has certain hydrophobicity and waterproofness under the effect of the polydimethylsiloxane so as to isolate water resources required by microorganisms, so that the antibacterial performance of the composite fabric can be further improved; an electrostatic spinning device can improve the spinning efficiency and realize mass production; the internal humidity can be adjusted through the humidity control mechanism, so that the spinning quality is better.
Description
Technical Field
The invention relates to the technical field of fabric production, in particular to a preparation method of underwear fabric compounded with nano antibacterial fibers and an electrostatic spinning device.
Background
As underwear of people, consumers have higher and higher requirements on comfort, air permeability and moisture permeability and the ability of keeping cleanness.
The preparation method of the traditional antibacterial underwear fabric comprises two methods: one is that: blending the antibacterial fiber yarn and the fabric yarn; the antibacterial fiber yarns need to be additionally prepared and then are blended with the fabric yarns to form the antibacterial fabric, the existing fabric cannot be utilized for preparation, the needed process is multiple, and the consumed time is long. The other is as follows: based on the operations of coating, soaking and the like on the fabric fibril, a layer of antibacterial substance is attached to the fibril, thereby achieving the aim of antibiosis; the antibacterial substances attached to the fabric fibrils need to be subjected to operations such as coating, soaking and the like, the number of required processes is large, and the attached antibacterial substances are mostly in a scaly blocky structure, so that shedding residues are easily caused by operations such as kneading and the like, the softness of the fabric is reduced and the like; meanwhile, the method has the problems of waste of a large amount of antibacterial solution, insufficient utilization rate of raw materials and the like in processing;
thus, publication No. CN111329135A discloses a composite nano antibacterial fiber underwear fabric and a preparation method thereof to solve the above problems; however, in the preparation method, silver nitrate is added into the spinning solution to realize the antibacterial performance of the spinning solution, and certain toxic and side effects exist, so that the spinning solution adopting natural antibacterial substances is needed to reduce the influence on the human health.
And the electrostatic spinning as a method for preparing the nano-fiber has the characteristics of simplicity, low cost, controllable fiber form and the like. Compared with the traditional spinning mode, the electrostatic spinning is mainly characterized in that the polymer spinning solution generates jet flow by utilizing a high-voltage electric field. During the process that the fiber reaches the receiving device after the jet flow, the solvent in the fiber is evaporated and solidified, and then the fiber-shaped substance is obtained. Compared with other technologies, the electrostatic spinning technology has the advantages of simple equipment, lower cost, strong operability and the like; the existing electrostatic spinning equipment generally adopts relatively small equipment, has low working efficiency and is not suitable for large-scale continuous production;
also in electrospinning, relative humidity is a key parameter that affects almost all properties of the collected fibers, such as morphology, mechanical properties, liquid retention, wetting properties, phase composition, chain conformation and surface potential. Relative humidity is a process-determining factor for reliability because it controls charge dissipation and solvent evaporation; the importance of controllable humidity in electrospinning is therefore increasing.
Disclosure of Invention
In order to solve the problems, the invention provides a preparation method of underwear fabric of composite nano antibacterial fibers and an electrostatic spinning device for electrostatic spinning of the underwear fabric, which can improve the antibacterial effect of the underwear fabric and reduce the influence on human health; meanwhile, the electrostatic spinning device can realize mass production of the fabric.
In order to achieve the purpose, the invention adopts the technical scheme that: a preparation method of underwear fabric compounded with nano antibacterial fibers is characterized by comprising the following steps:
1) Preparing a base cloth layer: weaving antistatic fibers and cotton fibers into knitted gray cloth on a knitting machine in different proportions by blended yarns to obtain a base cloth layer;
2) Cleaning the base cloth layer prepared in the step 1) with clear water, and sterilizing, dedusting and destaticizing for later use;
3) Preparing a nano antibacterial spinning solution: mixing 15-25 parts of polylactic acid, 4-6 parts of castor oil, 4-6 parts of echinacea purpurea extract, 80-120 parts of ethanol and 50-60 parts of chloroform to obtain a first spinning solution for later use;
mixing 4-6 parts of polydimethylsiloxane, 15-25 parts of polyvinylpyrrolidone, 70-90 parts of ethanol and 60-80 parts of ether with each other to obtain a second spinning solution for later use;
4) Adding the first spinning solution obtained in the step 3) into a solution storage mechanism of electrostatic spinning equipment, taking the base cloth layer as a spinning collection mechanism of electrostatic spinning, and directly electro-spinning the surface of the base cloth layer by using the electrostatic spinning equipment to form a first nano antibacterial fiber layer to obtain a composite base cloth layer;
5) Adding the second spinning solution obtained in the step 3) into a solution storage mechanism of electrostatic spinning equipment, taking the composite base cloth layer obtained in the step 4) as a spinning collection mechanism of electrostatic spinning, and directly forming a second nano antibacterial fiber layer on the surface of the first nano antibacterial fiber layer by using the electrostatic spinning equipment;
6) And compounding the fabric layer on the outer surface of the second nano antibacterial fiber layer by adopting a hot pressing process to obtain the underwear fabric compounded with the nano antibacterial fibers.
The invention is further set that the antistatic fiber is any one of PAN fiber, acrylic fiber, bamboo fiber, nylon fiber and metal fiber.
The invention further provides that the preparation steps of the antistatic fiber are as follows:
s1: preparing an antistatic solution: mixing the antistatic modifying liquid, the hydrophilic soft finishing agent and the absolute ethyl alcohol in a ratio of 3:1:5 to obtain an antistatic solution;
s2: placing the obtained antistatic solution into ultrasonic equipment, heating to 65-70 deg.C, and treating for 30-40min;
s3: and (3) putting the fiber into ultrasonic equipment, mixing the fiber with the solution A, starting the ultrasonic equipment, then raising the temperature of 5 ℃ to 50-60 ℃ every 2-3min, and continuing for 15-30min to obtain the antistatic fiber.
An electrospinning device for spraying the spinning solution on the surface of the base fabric layer to form a nanofiber layer in the step or steps of the claims; the spinning device is characterized by comprising a mounting frame, wherein a conveying mechanism for conveying a base cloth layer is arranged on the mounting frame, a spinning box is arranged on a transmission path of the conveying mechanism, a partition plate is arranged in the spinning box, the partition plate divides the spinning box into an upper cavity and a lower cavity, a through hole is formed between the upper cavity and the lower cavity, and spinning mechanisms facing the base cloth layer are arranged in the upper cavity and the lower cavity; two sides of the partition plate are also connected with conductive rollers in a rolling way;
the spinning box is characterized in that a humidity control mechanism is further arranged in the spinning box and used for controlling the humidity in the spinning box.
The invention is further provided that the conveying mechanism comprises a discharge port and a feed port which are arranged on the spinning box and located on one side, the discharge port and the feed port are respectively provided with a material receiving roller and a material feeding roller, a conveying roller is arranged between the material feeding roller and the material receiving roller, and the conveying roller is located at the through hole and used for enabling the movement path of the base cloth layer to be arranged in a U shape.
The spinning mechanism further comprises a liquid storage tank connected with the spinning box, the liquid storage tank is connected with a material barrel through a pipeline, the material barrel is connected with a material conveying pipe, and the material conveying pipe is connected with a spinning needle; the material barrel is also internally provided with a piston rod, and one end of the piston rod, which is far away from the material barrel, is provided with a driving mechanism for driving the piston rod to reciprocate in the material barrel.
The invention is further provided with a material inlet pipe and a material outlet pipe which are arranged at two ends of the material barrel, wherein the two material inlet pipes are connected with the liquid storage tank through pipelines, and one-way valves are arranged in the material inlet pipes and are used for controlling the spinning solution to flow from the liquid storage tank to the material barrel in a one-way mode; the discharging pipes are connected with the spinning needle through the material conveying pipes, one-way valves are arranged in the discharging pipes and are used for controlling the spinning liquid to flow from the material barrel to the spinning needle.
The invention is further provided that the humidity control mechanism comprises a humidity sensor arranged in the spinning box, the humidity sensor is connected with a PLC control module, the PLC control module is connected with a dehumidifier and a humidifier which are arranged in the spinning box, and the humidifier is connected with a water pipe connected with a water source.
The invention is further set that the driving mechanism comprises a rotating motor arranged in the spinning box, one side of the rotating motor is provided with a material barrel frame used for fixing the material barrel, a sliding frame is arranged between the material barrel frame and the rotating motor, a push rod with one end connected with a piston rod is connected onto the sliding frame in a sliding manner, a lead screw is arranged between the push rod and the rotating motor, one end of the lead screw is fixedly connected with the rotating motor, and the other end of the lead screw is connected with the push rod through threads.
The invention is further set that a temperature control mechanism is arranged in the spinning box, the temperature control mechanism comprises a temperature sensor arranged in the spinning box, the temperature sensor is connected with the PLC control module, a ventilation pipe connected with an air source outside the box body is also arranged in the spinning box, a fan is arranged in the ventilation pipe, a semiconductor refrigeration sheet is arranged on the inner wall of the ventilation pipe, the hot end or the cold end of the semiconductor refrigeration sheet faces the inner wall of the ventilation pipe and is rotationally connected with the ventilation pipe, and the temperature control mechanism also comprises a rotating motor connected with the PLC control module, and the rotating motor is used for controlling the orientation of the hot end or the cold end of the semiconductor refrigeration sheet; the air inlet fan and the air source are also electrically connected with the PLC control module.
In conclusion, the invention has the beneficial effects that:
1. the first spinning solution containing the castor oil and the echinacea purpurea extract and the second spinning solution containing the polydimethylsiloxane are arranged on the base cloth layer, so that the antibacterial performance of the composite fabric can be remarkably improved under the compounding effect of the castor oil and the echinacea purpurea extract, and the composite fabric has certain hydrophobic and waterproof properties under the effect of the polydimethylsiloxane so as to isolate water resources required by microorganisms, and further improve the antibacterial performance of the composite fabric; the natural material can reduce the damage to the health of the human body; and the base cloth layer is through combining together fibre and antistatic modified liquid, hydrophilic soft finishing agent and absolute ethyl alcohol to make with the cotton fiber blending, compare with current technique and can improve its antistatic effect, and compare with some present surface fabrics that add ordinary conductive fiber, can be more durable lasting, the soft degree of feeling when guaranteeing to use, make and wear more comfortable.
2. Compared with the existing electrostatic spinning device, the electrostatic spinning device can drive the base cloth layer to be continuously and stably conveyed in the spinning box through the feeding roller, the collecting roller and the conveying roller, and meanwhile, the double-layer fiber membrane can be sprayed on the surface of the base cloth layer through the symmetrically arranged spinning mechanisms, so that the electrostatic spinning efficiency is improved, and the large-scale production of nano fabrics can be met.
3. The spinning box is also internally provided with a temperature control device and a humidity control mechanism which can adjust the temperature and the humidity in the spinning box, thereby reducing the influence of the temperature and the humidity on the nano fibers and improving the quality of the fibers.
4. The continuous output of the spinning solution in the processing process can be guaranteed through the arrangement of the material barrel, so that the spinning solution can not be cut off in the spinning process, the distribution of the nano fibers on the base cloth layer is more uniform, and the quality of the fabric is better.
Drawings
Fig. 1 is a schematic cross-sectional view of the apparatus of this embodiment.
Fig. 2 is a schematic structural diagram of the temperature control mechanism in the embodiment.
FIG. 3 is a schematic structural view of the spinning mechanism of this embodiment.
Fig. 4 is an enlarged schematic view at a of fig. 3.
Fig. 5 is a block diagram of module connection of the present embodiment.
Reference numerals: 1-a mounting rack; 2-a conveying mechanism; 201-receiving roller; 202-a feed roll; 203-conveying rollers; 3-spinning box; 301-a divider plate; 302-an upper chamber; 303-lower chamber; 304-a via; 4-a spinning mechanism; 401-liquid storage tank; 402-a material cylinder; 412-a feed pipe; 422-discharge pipe; 432-a one-way valve; 442-a one-way valve; 403-a delivery conduit; 404-spinneret needle; 405-a piston rod; 5-a humidity control mechanism; 501-humidity sensor; 502-a dehumidifier; 503-a humidifier; 6-a drive mechanism; 601-rotating the motor; 602-material barrel rack; 603-a sliding frame; 604-a push rod; 605-a screw mandrel; 7-low pressure mercury lamps; 8-a mirror; 9-temperature control mechanism; 901-a temperature sensor; 902-a vent pipe; 903-an air inlet fan; 904-semiconductor chilling plates.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 to 4, the embodiment discloses a preparation method of underwear fabric compounded with nano antibacterial fibers, which is characterized by comprising the following steps:
1) Preparing a base cloth layer: weaving antistatic fibers and cotton fibers into knitted gray cloth on a knitting machine in different proportions to obtain a base cloth layer;
2) Cleaning the base cloth layer prepared in the step 1) with clear water, and sterilizing, dedusting and destaticizing for later use;
3) Preparing a nano antibacterial spinning solution: wherein the first spinning solution is prepared by mixing 12g of polylactic acid, 3g of castor oil, 3g of echinacea purpurea extract, 130g of ethanol and 40g of chloroform; the average molecular weight of the polylactic acid 50000; in the echinacea purpurea extract, the mass content of echinacea purpurea polyphenol is 4%, and the mass content of chicoric acid is 2%; placing the prepared first spinning solution in a liquid storage tank 401 matched with the lower cavity 303, and then electrospinning the surface of the base cloth layer
The second spinning solution is obtained by mixing 3g of polydimethylsiloxane, 12g of polyvinylpyrrolidone, 60g of ethanol and 90g of ether and is subsequently added into a liquid storage tank 401 corresponding to the upper cavity 302 for standby;
4) Adding the first spinning solution obtained in the step 3) into a solution storage mechanism of electrostatic spinning equipment, taking the base cloth layer as a spinning collection mechanism of electrostatic spinning, and directly electro-spinning the surface of the base cloth layer by using the electrostatic spinning equipment to form a first nano antibacterial fiber layer to obtain a composite base cloth layer;
5) Adding the second spinning solution obtained in the step 3) into a solution storage mechanism of electrostatic spinning equipment, taking the composite base cloth layer obtained in the step 4) as a spinning collection mechanism of electrostatic spinning, and directly forming a second nano antibacterial fiber layer on the surface of the first nano antibacterial fiber layer by using the electrostatic spinning equipment;
6) And compounding the fabric layer on the outer surface of the second nano antibacterial fiber layer by adopting a hot pressing process to obtain the underwear fabric compounded with the nano antibacterial fibers.
In this embodiment, the antistatic fiber is any one of PAN fiber, acrylic fiber, bamboo fiber, nylon fiber, and metal fiber.
In this example, the antistatic fiber was prepared as follows:
s1: preparing an antistatic solution: mixing the antistatic modifying liquid, the hydrophilic soft finishing agent and the absolute ethyl alcohol in a proportion of 3:1:5 to obtain an antistatic solution;
s2: placing the obtained antistatic solution into ultrasonic equipment, heating to 65-70 deg.C, and treating for 30-40min;
s3: and (3) putting the fiber into ultrasonic equipment, mixing the fiber with the solution A, starting the ultrasonic equipment, then raising the temperature of 5 ℃ to 50-60 ℃ every 2-3min, and continuing for 15-30min to obtain the antistatic fiber.
An electrospinning device for spraying the spinning solution on the surface of the base fabric layer in the step 4 or the step 5 of claim 1 to form a nanofiber layer; the spinning device is characterized by comprising a mounting frame 1, wherein a conveying mechanism 2 for conveying a base cloth layer is arranged on the mounting frame 1, a spinning box 3 is arranged on a transmission path of the conveying mechanism 2, a partition plate 301 is arranged in the spinning box 3, the spinning box 3 is divided into an upper cavity 302 and a lower cavity 303 by the partition plate 301, a through hole 304 is formed between the upper cavity 302 and the lower cavity 303, and spinning mechanisms 4 facing the base cloth layer are arranged in the upper cavity 302 and the lower cavity 303; two sides of the partition plate 301 are also connected with conductive rollers in a rolling manner; the partition plate 301 is made of metal, the joint of the partition plate and the spinning box 3 is made of insulating materials to form an insulating partition plate so as to prevent the spinning box 3 from being electrified, and the partition plate 301 is connected with a ground wire or negative high voltage so as to enable the conductive roller to be grounded or connected with the negative high voltage; the outside of the spinning needle 404 in the spinning mechanism 4 is also connected with high voltage through a transformer, so that the spinning solution at the end part of the spinning needle 404 has a spherical shape and can be changed into a conical shape under the action of an electric field, and fiber filaments are obtained by extending from the tip of the conical shape, thereby realizing spinning on the surface of the base cloth layer;
as shown in fig. 1, an upper cavity 302 and a lower cavity 303 are formed in the spinning manifold 3 by a partition plate 301, a discharge port is arranged on the upper cavity 302, and a material receiving roller 203 is arranged at the discharge port; the lower cavity 303 is provided with a feeding hole on the same side as the discharging hole, the feeding hole is provided with a feeding roller 202, when the base cloth layer needs to be electrospun, two ends of the base cloth layer are respectively connected with the feeding roller 202 and the material receiving roller 203, and the base cloth layer is turned by a conveying roller in the spinning box 3, so that the base cloth layer moves along a U-shaped path; the spinning mechanisms 4 are arranged in the upper cavity and the lower cavity, so that a double-layer nanofiber membrane can be formed on the surface of the base cloth layer, and the spinning efficiency is improved; and the two independent spinning mechanisms 4 can add different spinning solutions, so that the two layers of the nanofiber membranes in spinning have different functions.
A humidity control mechanism 5 is further arranged in the spinning box 3, and the humidity control mechanism 5 is used for controlling the humidity in the spinning box 3; the humidity control mechanism 5 comprises a humidity sensor 501 arranged in the spinning box 3, the humidity sensor 501 is connected with a PLC control module, the PLC control module is connected with a dehumidifier 502 and a humidifier 503 which are arranged in the spinning box 3, and the humidifier 503 is connected with a water pipe connected with a water source;
the dehumidifier 502 and the humidifier 503 can be controlled by the PLC control module; the humidity sensor 501 can detect the humidity in the spinning box 3, and when the humidity is higher than a set value, the PLC control module controls the dehumidifier 502 to start so as to discharge the moisture in the box body; when the humidity reaches a preset range, the dehumidifier is closed; when the humidity is too low, the humidifier 503 is controlled to release water mist to the inside; the water inlet of the humidifier 503 is directly connected with the water pipe, so that inconvenience caused by frequent water addition is avoided;
meanwhile, the moisture is heavier, so that the humidity sensor is arranged in the lower cavity of the spinning box 3, so that the detection of the humidity sensor is more sensitive.
In this embodiment, the spinning mechanism 4 includes a liquid storage tank 401 connected to the spinning tank 3, the liquid storage tank 401 is connected to a material barrel 402 through a pipeline, the material barrel 402 is connected to a material conveying pipe 403, and the material conveying pipe 403 is connected to a spinning needle 404; a piston rod 405 is further arranged in the material cylinder 402, and a driving mechanism 6 for driving the piston rod 405 to reciprocate in the material cylinder 402 is arranged at one end, far away from the material cylinder 402, of the piston rod 405; the driving mechanism 6 comprises a rotating motor 601 arranged in the spinning box 3, a material barrel frame 602 is arranged on one side of the rotating motor 601, a sliding frame 603 is arranged between the material barrel frame 602 and the rotating motor 601, a push rod 604 with one end connected with the piston rod 405 is connected onto the sliding frame 603 in a sliding mode, a lead screw 605 is arranged between the push rod 604 and the rotating motor 601, one end of the lead screw 605 is fixedly connected with the rotating motor 601, and the other end of the lead screw is connected with the push rod 604 through threads.
The reciprocating motion of the piston rod 405 is controlled through the lead screw and the push rod, so that the speed of the piston rod 405 is more stable when the piston rod extrudes the liquid in the material barrel 402, the speed of the spinning liquid sprayed out from the spinning needle 404 is more stable, the spinning is more uniform, and the quality is better; simultaneously as shown in fig. 3, the rotating rod of the spinning needle 404 is rotatably connected to the support frame, and one end of the rotating rod is connected with the motor, so that the reciprocating swing of the spinning needle 404 can be realized, the spraying range of the spinning solution is larger, and the spinning is more uniform.
In this embodiment, as shown in fig. 3 to 4, two ends of the material barrel 402 are respectively provided with a feeding pipe 412 and a discharging pipe 422, the two feeding pipes 412 are respectively connected to the liquid storage tank 401 through a pipeline, and a one-way valve 432 is arranged in the feeding pipe 412 and is used for controlling the one-way flow of the spinning solution from the liquid storage tank 401 to the material barrel 402; the discharging pipes 422 are connected with the spinning needle 404 through the material conveying pipes 403, one-way valves 442 are arranged in the discharging pipes 422, and the one-way valves 442 are used for controlling the spinning liquid to flow from the material barrel 402 to the spinning needle 404; when the piston rod 405 is pushed forward under the action of the push rod 604, the pressure at the front end of the material barrel 402 increases with the reduction of the space, and the pressure can close the check valve 432 in the front end feeding pipe 412, so that the spinning solution in the liquid storage tank 401 cannot enter the front end of the material pipe, and the check valve 442 in the discharging pipe 422 is opened, so that the liquid at the front end of the material pipe enters the spinning needle 404 through the feeding pipe 403; meanwhile, as the piston rod 405 moves towards the front end of the material pipe 402, the space at the rear end of the material pipe 402 is gradually increased, so that the air pressure is gradually reduced, and under the action of pressure, the one-way valve in the rear end feeding pipe 412 is opened, the one-way valve in the discharging pipe 422 is closed, so that liquid in the liquid storage tank 401 enters the rear end of the material pipe 402 to complete liquid feeding;
when the piston rod 405 moves towards the rear end under the action of the push rod 604, the one-way valve of the rear end feeding pipe 412 is closed, and the one-way valve in the discharging pipe 422 is opened, so that liquid in the rear end space enters the spinning needle 404;
the gapless spinning of the spinning needle can be realized through the structure, so that the spinning efficiency is improved, and the uniformity of spinning can be ensured.
In this embodiment, as shown in fig. 2, a temperature control mechanism 9 is arranged in the spinning box 3, the temperature control mechanism 9 includes a temperature sensor 901 arranged in the spinning box 3, the temperature sensor 901 is connected with the PLC control module, a ventilation pipe 902 connected with an air source outside the box body is also arranged in the spinning box 3, a fan 903 is arranged in the ventilation pipe 902, a semiconductor refrigeration sheet 904 is arranged on the inner wall of the ventilation pipe 902, the hot end or the cold end of the semiconductor refrigeration sheet 904 faces the inner wall of the ventilation pipe 902 and is rotatably connected with the ventilation pipe 902, and the spinning machine further includes a rotating motor connected with the PLC control module, and the rotating motor is used for controlling the orientation of the hot end of the semiconductor refrigeration sheet 904; the air inlet fan 903 and the air source are also electrically connected with the PLC control module; the air source continuously supplies dry and clean air to the spinning box 3, so that the spinning box 3 is in a positive pressure state, and external dust is prevented from entering the spinning box 3 to influence spinning quality; the spinning box is also provided with an exhaust hole; when the temperature in the spinning box 3 is too high, the temperature sensor 901 is triggered to send a signal to the PLC control module, so that the semiconductor refrigerating sheet 904 and the air inlet fan 903 are controlled to work; the hot end of the semiconductor refrigeration piece 904 always faces the inner side of the ventilation pipe 902; when the temperature is too high, the PLC control module controls the rotating motor to rotate once and rotate for a half turn each time, so that the semiconductor refrigerating sheet is controlled to rotate, the positions of the cold end and the hot end are changed, and at the moment, when the air source supplies air to the inside, the air is cooled through the ventilation pipe 902, so that the inside can be cooled after entering the spinning box 3; after the semiconductor refrigerating sheet is closed, the rotating motor controls the semiconductor refrigerating sheet to rotate reversely, so that the hot end of the semiconductor refrigerating sheet faces the inside; when the temperature is too low, the gas is heated under the action of the hot end, so that the temperature in the box body is increased.
In this embodiment, a pair of low-pressure mercury lamps 7 is disposed on the inner wall of the spinning box 3, the pair of low-pressure mercury lamps 7 are respectively located in the upper cavity 302 and the lower cavity 303, a reflector 8 for reflecting ultraviolet light emitted by the low-pressure mercury lamps 7 is further disposed on the inner wall of the spinning box 3, the reflector 8 is disposed on one side of the low-pressure mercury lamps 7 far away from the base fabric layer, and the reflecting surface faces the base fabric layer; when ultraviolet light irradiates the surface of the fiber, ultraviolet photon energy is absorbed by charge carriers injected to the surface of the polymer fiber due to a high-voltage electric field, and then the charge carriers are excited to enter the atmosphere, so that residual charges in the fiber mat are quickly dissipated in a short time, the influence of the residual charges on an external electric field in an electrostatic spinning process is eliminated, the stability of electrostatic spinning is improved, the yield of the micro-nano fiber produced by electrostatic spinning is greatly improved, and the cumulative thickness of the spinning fiber mat is increased.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the design concept of the present invention should be included in the scope of the present invention.
Claims (10)
1. A preparation method of underwear fabric compounded with nano antibacterial fibers is characterized by comprising the following steps:
1) Preparing a base cloth layer: weaving antistatic fibers and cotton fibers into knitted gray cloth on a knitting machine in different proportions by blended yarns to obtain a base cloth layer;
2) Cleaning the base cloth layer prepared in the step 1) with clear water, and sterilizing, dedusting and static-removing for later use;
3) Preparing a nano antibacterial spinning solution: mixing 15-25 parts of polylactic acid, 4-6 parts of castor oil, 4-6 parts of echinacea purpurea extract, 80-120 parts of ethanol and 50-60 parts of chloroform with each other to obtain a first spinning solution for later use;
4-6 parts of polydimethylsiloxane, 15-25 parts of polyvinylpyrrolidone, 70-90 parts of ethanol and 60-80 parts of ether are mixed with each other to obtain a second spinning solution for later use;
4) Adding the first spinning solution obtained in the step 3) into a solution storage mechanism of electrostatic spinning equipment, taking the base cloth layer as a spinning collection mechanism of electrostatic spinning, and directly electro-spinning the surface of the base cloth layer by using the electrostatic spinning equipment to form a first nano antibacterial fiber layer to obtain a composite base cloth layer;
5) Adding the second spinning solution obtained in the step 3) into a solution storage mechanism of electrostatic spinning equipment, taking the composite base cloth layer obtained in the step 4) as a spinning collection mechanism of electrostatic spinning, and directly forming a second nano antibacterial fiber layer on the surface of the first nano antibacterial fiber layer by using the electrostatic spinning equipment;
6) And compounding the fabric layer on the outer surface of the second nano antibacterial fiber layer by adopting a hot pressing process to obtain the underwear fabric compounded with the nano antibacterial fibers.
2. The method for preparing the underwear fabric with the composite nano antibacterial fibers, according to claim 1, is characterized in that the antistatic fibers are any one of PAN fibers, acrylic fibers, bamboo fibers, nylon fibers and metal fibers.
3. The preparation method of the underwear fabric made of the composite nano antibacterial fibers, according to claim 2, is characterized in that the preparation steps of the antistatic fibers are as follows:
s1: preparing an antistatic solution: mixing the antistatic modifying liquid, the hydrophilic soft finishing agent and the absolute ethyl alcohol in a proportion of 3:1:5 to obtain an antistatic solution;
s2: placing the obtained antistatic solution into ultrasonic equipment, heating to 65-70 deg.C, and treating for 30-40min;
s3: and (3) putting the fiber into ultrasonic equipment, mixing the fiber with the solution A, starting the ultrasonic equipment, heating the fiber to 5 ℃ to 50-60 ℃ every 2-3min, and keeping the temperature for 15-30min to obtain the antistatic fiber.
4. An electrostatic spinning device, which is used for spraying spinning solution on the surface of the base cloth layer in the step 4) or the step 5) in the claim 1 to form a nano fiber layer; the spinning device is characterized by comprising a mounting rack (1), wherein a conveying mechanism (2) for conveying a base cloth layer is arranged on the mounting rack (1), a spinning box (3) is arranged on a transmission path of the conveying mechanism (2), a partition plate (301) is arranged in the spinning box (3), the partition plate (301) divides the spinning box (3) into an upper cavity (302) and a lower cavity (303), a through hole (304) is formed between the upper cavity (302) and the lower cavity (303), and spinning mechanisms (4) facing the base cloth layer are arranged in the upper cavity (302) and the lower cavity (303); two sides of the partition plate (301) are also connected with conductive rollers in a rolling way;
the spinning box is characterized in that a humidity control mechanism (5) is further arranged in the spinning box (3), and the humidity control mechanism (5) is used for controlling the humidity in the spinning box (3).
5. The electrostatic spinning device according to claim 4, wherein the conveying mechanism (2) comprises a discharge port and a feed port which are arranged on the spinning box (3) and located on one side, a material receiving roller (201) and a material feeding roller (202) are respectively arranged at the discharge port and the feed port, a conveying roller (203) is arranged between the material feeding roller (202) and the material receiving roller (201), and the conveying roller (203) is located at the through hole (304) and used for enabling the movement path of the base fabric layer to be arranged in a U shape.
6. The electrostatic spinning device according to claim 4, characterized in that the spinning mechanism (4) comprises a liquid storage tank (401) connected with the spinning box (3), the liquid storage tank (401) is connected with a material barrel (402) through a pipeline, the material barrel (402) is connected with a material conveying pipe (403), and the material conveying pipe (403) is connected with a spinning needle (404); a piston rod (405) is further arranged in the material barrel (402), and a driving mechanism (6) for driving the piston rod (405) to move in the material barrel (402) in a reciprocating mode is arranged at one end, far away from the material barrel (402), of the piston rod (405).
7. The electrostatic spinning device according to claim 6, characterized in that the material cylinder (402) is provided with a feeding pipe (412) and a discharging pipe (422) at two ends, the two feeding pipes (412) are connected with the liquid storage tank (401) through pipelines, a one-way valve (432) is arranged in the feeding pipe (412), and the one-way valve (432) is used for controlling the spinning liquid to flow from the liquid storage tank (401) to the material cylinder (402) in one way; the pair of discharge pipes (422) are connected with the spinning needle (404) through the material conveying pipe (403), a one-way valve (442) is arranged in each discharge pipe (422), and the one-way valve (442) is used for controlling the spinning liquid to flow from the material barrel (402) to the spinning needle (404).
8. The electrostatic spinning device according to claim 4, wherein the humidity control mechanism (5) comprises a humidity sensor (501) arranged in the spinning box (3), the humidity sensor (501) is connected with a PLC control module, the PLC control module is connected with a dehumidifier (502) and a humidifier (503) which are arranged in the spinning box (3), and the humidifier (503) is connected with a water pipe connected with a water source.
9. The electrostatic spinning device according to claim 6, wherein the driving mechanism (6) comprises a rotating motor (601) arranged in the spinning box (3), a material barrel frame (602) used for fixing the material barrel (402) is arranged on one side of the rotating motor (601), a sliding frame (603) is arranged between the material barrel frame (602) and the rotating motor (601), a push rod (604) with one end connected with the piston rod (405) is connected on the sliding frame (603) in a sliding manner, a lead screw (605) is arranged between the push rod (604) and the rotating motor (601), one end of the lead screw (605) is fixedly connected with the rotating motor (601), and the other end of the lead screw is connected with the push rod (604) through threads.
10. The electrostatic spinning device according to claim 8, characterized in that a temperature control mechanism (9) is arranged in the spinning box (3), the temperature control mechanism (9) comprises a temperature sensor (901) arranged in the spinning box (3), the temperature sensor (901) is connected with a PLC control module, a ventilation pipe (902) connected with an air source outside the box body is further arranged in the spinning box (3), an air inlet fan (903) is arranged in the ventilation pipe (902), a semiconductor refrigeration piece (904) is arranged on the inner wall of the ventilation pipe (902), the hot end or the cold end of the semiconductor refrigeration piece (904) faces the inner wall of the ventilation pipe (902) and is rotatably connected with the ventilation pipe (902), and the electrostatic spinning device further comprises a rotating motor connected with the PLC control module, and the rotating motor is used for controlling the orientation of the hot end or the cold end of the semiconductor refrigeration piece (904); the air inlet fan (903) and the air source are also electrically connected with the PLC control module; an air outlet is arranged on the spinning box (3).
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| CN202211328744.7A CN115559052A (en) | 2022-10-27 | 2022-10-27 | Preparation method of underwear fabric compounded with nano antibacterial fibers and electrostatic spinning device |
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