TWI628324B - Producing method of nano-fiber yarn and apparatus thereof - Google Patents

Abstract

A nanofiber-forming device comprising a fiber generating module disposed adjacent to and sequentially disposed, a jet vortex module, and a yarn collecting device, wherein: the fiber generating module comprises one of high potential differences a fiber extrusion device and a receiving screen, the fiber extrusion device extruding the nanofiber toward the receiving screen; the jet air vortex module comprises a gas vortex tube capable of generating a supersonic gas vortex, the two ends of the gas vortex tube Having a fiber end for receiving extruded nanofibers and a yarn end, the gas vortex twisting and twisting the nanofibers to produce a yarn outputted from the yarn end; and the yarn collecting device adjacent to the setting At the yarn end, the yarn is collected.

Description

Nano fiber forming method and equipment thereof

A method for forming a nanofiber into a yarn, in particular, a method of using a gas vortex generated by a supersonic jet to form a nanofiber into a yarn.

Nanofibers have excellent properties such as high specific surface area and high strength. They are widely used in many fields such as electronics, chemical, energy, medical, biomedical engineering, aerospace or insulating materials to develop various materials, uses, sizes or Types of nanofibers have been a major focus for developers in recent years.

Electrospinning for the production of nanofibers is a common method in recent years. However, although nanofibers produced by electrospinning have many advantages, nanofibers can usually only be used because of the small size and the difficulty in manufacturing collection. In the form of non-woven fabrics, there is no technical means for effectively collecting spinning by electrospinning and then weaving to form a woven fabric. Therefore, the promotion of electrospinning technology and the use of related products are greatly limited.

In order to solve the shortcoming that the nanofibers manufactured by electrospinning cannot be effectively collected into yarns and formed into a sheet-like braid, the present invention is a nanofiber-forming device comprising a fiber disposed adjacent to and sequentially arranged. Generating a module, a jet vortex module, and a yarn collecting device, wherein: the fiber The dimension generation module comprises a fiber extrusion device having a high potential difference and a receiving screen, the fiber extrusion device extruding the nanofiber toward the receiving screen; the jet gas vortex module comprises a gas vortex generating gas a scroll tube having a fiber end at each end for receiving the extruded nanofiber and a yarn end, the gas vortex twisting and twisting the nanofiber to produce a yarn from the yarn end An output; and the yarn collecting device is disposed adjacent to the yarn exiting end for collecting the yarn.

Wherein, the fiber generating module, the jet vortex module and the yarn collecting device are further provided with a yarn guide.

Wherein, the fiber generating module is a 3D printing machine.

Wherein, the gas scroll is further connected to an air pump for forming the gas vortex.

Wherein, the yarn collecting device is a winding roller.

Wherein, it further comprises a plurality of the fiber generating modules to extrude the same or different nanofiber materials.

Wherein, the extrusion die of the fiber generating module is Teflon material or platinum material.

The present invention further provides a method for forming a nanofiber, the method comprising: guiding a plurality of nanofibers from a fiber end into an air vortex tube, and vortexing the gas generated in the gas vortex tube to form a plurality of After the nanofibers are bundled, the yarn is synthesized.

Among them, the nanofiber system is produced by a 3D printing method.

The invention combines the advantages of the 3D printing and the electrospinning process, and successfully assembles the nanofibers into bundles for the braided products, breaking through the limitations that the nanofibers can only be presented in the form of non-woven fabrics, sheets or films.

10‧‧‧Fiber Generation Module

11‧‧‧Fiber Extrusion Unit

13‧‧‧ Receiving screen

15‧‧‧High-voltage power supply unit

20‧‧‧Air jet vortex module

21‧‧‧Vortex

211‧‧‧Perforation

213‧‧‧Into the fiber end

215‧‧‧ yarn end

23‧‧‧ gas supply pipe

25‧‧‧Air pump

30‧‧‧Setting device

1 is a schematic view of a first preferred embodiment of the present invention.

Figure 2 is a partial schematic view of a second preferred embodiment of the present invention.

Figure 3 is a schematic view of a preferred embodiment of the gas scroll of the present invention.

Referring to FIG. 1, a preferred embodiment of the apparatus of the present invention includes a fiber generating module 10, a jet vortex module 20, and a yarn collecting device 30 disposed adjacent to each other. The fiber generating module 10 includes a fiber extruding device 11, a receiving screen 13, and a high voltage power supply device 15, and the receiving screen 13 is spaced apart from a corresponding position of an extrusion port of the fiber extruding device 11 to receive the fiber. The fibers extruded or produced by the extrusion device 11 are preferably disposed at a distance below the fiber extrusion device 11 so that the fiber extrusion device 11 can be subjected to gravity and the high pressure when extruding the material. The electric field generated by the power supply device 15 effectively generates electrospinning.

The receiving screen 13 or the fiber generating module 10 is respectively connected to a grounding level and a high voltage provided by the high voltage power source 15 to provide a voltage difference (electric field) between the receiving screen 13 and the fiber extrusion device 11 to facilitate The material extruded from the extrusion port of the fiber extrusion device 11; the type of the fiber extrusion device 11 is not limited, and may be a melted material extrusion device or an extrusion device in a volatile form. For example, the melted material extrusion device may be a material extrusion device including a screw mixing and heating device, which adds a plastic material to the device, heats and screws the mixture to form a flowing plastic material. Extrusion from the extrusion port of the melted material extrusion apparatus, the fluid dynamic material can be drawn into the ultrafine fibers as described above to be ejected toward the yarn collecting device 30. Alternatively, the melted material is extruded The device can be a type of 3D material printing device (or commonly known as a 3D printer). The 3D material printing device comprises a movable die. After the strip material is input into the movable die, the molten material can be continuously melted and extruded. The effect of extrusion and spinning of the materials described in the preceding paragraph. The volatilized form of the extrusion device means that a liquid material is extruded into the needle-shaped extrusion port in the form of a type of syringe, and a part of the volatile material of the liquid material is volatilized after being ejected from the extrusion port to make the liquid material. Filamentation becomes an electrospun fiber.

The air vortex module 20 includes an air volute 21, an air supply pipe 23, and an air pump 25. The two ends of the air volute 21 have openings, one end of which is a fiber end 213 and the other end of which is a yarn output. The end 215, the tube wall of the vortex tube 21 is provided with a through hole 211 communicating with the air supply pipe 23, and the air pump 25 is configured to inject a gas of a set air pressure into the vortex tube 21 through the air supply pipe 23. A gas vortex is formed in the gas vortex tube 21. The yarn collecting device 30 can be a rotatable bobbin or a reeling roller. Between the fiber generating module 10, the jet vortex module 20 and the yarn collecting device 30, a yarn guide 40 may be further disposed, and the yarn guiding device 40 is provided with a guiding structure. The guiding structure guides the fibers generated by the fiber generating module 10 to the jet vortex module 20; the yarn guide 40 disposed between the jet vortex module 20 and the yarn collecting device 30 will be completed. One of the twisted yarns is guided by the jet type vortex module 20 to the yarn collecting device 30. The main purpose of the yarn guide 40 is to control the tension of the fiber or the yarn between the fiber generating module 10, the jet vortex module 20 and the yarn collecting device 30, thereby reducing the fiber or the yarn. The probability of a line break. The material of the yarn guide 40 is not limited, and may be made of metal, ceramic or low friction coefficient plastic, and the shape may be a guiding structure including a tapered shape.

Further, the foregoing electrospinning process is as follows: a preferred embodiment of the manufacturing method of the present invention is when the fiber extruding device 11 extrudes the liquid in a liquid or molten state toward the receiving screen 13 The high voltage difference between the device 11 and the receiving screen 13 causes the extruded material to be drawn and stretched into a nanofiber and directed toward the receiving screen 13 Further, the nanofiber is guided into the gas vortex tube 21 by the fiber end 211 in the foregoing manner, and the gas vortex formed in the gas vortex tube 21 by the gas supply pipe 23 is extremely fine. After the nanofibers are entangled and twisted to form a yarn having a certain diameter and thickness, the yarn and the yarn are guided to the yarn collecting device 30 by the yarn end 213 to collect the flat yarn. Here, the guided yarns and the yarns to the yarn collecting device 30 can be achieved by controlling the winding of the yarn collecting device 30. The invention can further make the polymer raw materials of different nano fibers into 3D printing strips, and the user can easily select and mix to obtain the desired composite nanofibers, and the general nanofiber process is omitted. Complex steps and equipment for fiber solutions. Due to the relatively high melting point of the polymer composite material, the Teflon extrusion die common in 3D printing machines may not provide such high temperature. Therefore, an extrusion die made of platinum may be used to smoothly laminate the nanometer. Fiber extrusion.

Further, the fiber generating module 10 can be provided with a plurality of movable die heads, and each movable die head inputs a polymer with different material characteristics, so that a plurality of materials of electrospun nanofibers can be produced at the same time, and then The technical effect of presenting a plurality of different material characteristic fibers on a single yarn is produced by the collection method of the present invention.

Referring to FIG. 2, a preferred embodiment of the method for forming a nanofiber into the gas vortex tube 21 is to pull a plurality of fine nanofibers into the gas vortex tube 21 to utilize The air pump 25 produces a high-speed compressed air to form a gas vortex. Preferably, the supersonic air is sprayed to form a supersonic gas vortex. After the nanofiber is bundled, the nanofiber is formed into a predetermined shape by twisting, false twisting or cohesion. The yarn of the diameter of the yarn is then guided to the yarn collecting device 30 for bale collection for subsequent application to any of the braided products.

In order to allow the nanofibers generated by the fiber generating module 10 to be guided into the jet vortex module 20, initially, a guiding material (for example, a yarn) may be placed by the yarn collecting device. 30 passing through the jet vortex module 20 to between the fiber extrusion device 11 and the receiving screen 13; When the raw module 10 starts to produce the nanofiber, the airflow disturbance of the jet type vortex module 30 causes the guiding material to sway, and the nanofiber is twisted and twisted on the guiding material, and the The yarn collecting device 30 starts to roll and the nanofibers are continuously twisted and twisted to produce a yarn made of nanofibers.

Referring to FIG. 3, the present invention can be provided with a plurality of the fiber extruding devices 11 for co-extruding nanofibers of the same or different materials on the receiving screen 13 and then vortexing into yarns by using a gas vortex, in addition to accelerating the whole. In addition to the advantages of process time, composite nanofibers can be formed according to the requirements of finished products, and the shortcomings of reinforcing single-material nanofibers can be achieved in different fields.

The invention is characterized in that the general 3D printing machine is combined with the principle of the electrospinning process, and the nanofibers are combined into a bundle through a jet vortex, and the nanofiber is successfully made into a yarn which can be applied to the knitting industry. It not only solves the dilemma that nanofibers are difficult to apply to woven products, but also has the advantages of small size and convenience of 3D printing machine, replacing the cumbersome and huge process equipment of general nanofibers, making nanofiber applications more diverse and extensive. . Moreover, the electrospinning fiber produced by the foregoing 3D printing device has the advantages of convenience, low equipment, and easy material preparation, and the movable die has the three-dimensional high-speed moving characteristic, thereby controlling the thickness of the twisted yarn. And material configuration, for example, by controlling the speed and position of the extruded material of a plurality of movable dies, so that the twisted yarn can produce the characteristics of different sections of materials or different materials, to achieve traditional spinning or existing The unpredictable effect of crepe technology.

Claims (6)

A yarn forming device for nanofibers, comprising a fiber generating module adjacent to and sequentially disposed, a jet vortex module and a yarn collecting device, wherein: the fiber generating module is a 3D printing machine And comprising a fiber extrusion device having a high potential difference and a receiving screen, the fiber extrusion device extruding the nanofiber toward the receiving screen; the fiber extrusion device comprises a plurality of movable die, the movable die Three-dimensional movement to extrude the same or different nanofibers; the jet type vortex module includes a gas vortex tube that generates a gas vortex, and the gas vortex tube has a fiber end at both ends for receiving the extrusion a nanofiber and a yarn end, the gas vortex twisting and twisting the nanofiber to produce a yarn outputted from the yarn end; and the yarn collecting device is disposed adjacent to the yarn end for collecting the yarn line. For example, in the yarn forming apparatus of the first aspect of the invention, the fiber generating module, the jet vortex module and the yarn collecting device are further provided with a yarn guide. For example, in the yarn forming apparatus of claim 1 of the nanofiber, the gas scroll is further connected to an air pump for forming the gas vortex. For example, in the yarn forming apparatus of the nanofiber of claim 1, the gas vortex is a supersonic gas vortex. For example, in the yarn forming apparatus of the first aspect of the patent application, the yarn collecting device is a winding roller. For example, in the yarn forming apparatus of the first item of the patent scope, the extrusion die of the fiber generating module is made of Teflon or platinum.