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Spinning apparatus, apparatus and process for manufacturing nonwoven fabric, and nonwoven fabric

a technology of nonwoven fabric and spinning liquid, which is applied in the direction of weaving, manufacturing tools, melting spinning methods, etc., can solve the problems of poor productivity of electropinning, difficult fibrous form of spinning liquid, and high cost so as to achieve stable spinning, increase the amount of spinning liquid extrusion, and high productivity

Inactive Publication Date: 2011-06-02
NIPPON BAIRIIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008]In the spinning apparatus of [1] according to the present invention, the spinning liquid extruded from each exit for extruding liquid is close and parallel to the gas ejected from each exit for ejecting gas, and a shearing force by the gas and its accompanying airstream can be single-linearly exerted on each spinning liquid, and thus, fibers of which the fiber diameter is thinned can be stably spun. Further, because the fibers are spun by the action of the gas, the amount of spinning liquid extruded can be increased, and as a result, the fibers can be spun with a high productivity.
[0009]Because the apparatus for manufacturing a nonwoven fabric of [2] according to the present invention comprises the fibers collection means, in addition to the spinning apparatus, a nonwoven fabric containing fibers having a small fiber diameter can be stably produced with a high productivity, by capturing the fibers spun by the spinning apparatus.
[0010]Because the process of [3] according to the present invention uses the apparatus for manufacturing a nonwoven fabric, a nonwoven fabric containing fibers having a small fiber diameter can be stably produced with a high productivity.
[0011]The nonwoven fabric of [4] according to the present invention is produced by the process, and thus, is a nonwoven fabric containing fibers having a small fiber diameter.

Problems solved by technology

However, the electrospinning is a method with a poor productivity, because the amount of spinning liquid extruded is limited.
However, because flat-shaped first, second, and third members are arranged parallel to each other in the apparatus, and the sheet-like pressurized gas stream is applied to a sheet-like spinning liquid, it is considered that the spinning liquid is difficult to have a fibrous form and the nonwoven fabric contains a lot of droplets, and that, if fibers can be obtained, the diameter of the fibers would become thick.
However, because the columnar or annular pressurized gas stream is applied to a spinning liquid annularly extruded, spinning cannot be stably performed, and the spinning liquid is difficult to have a fibrous form and the nonwoven fabric contains a lot of droplets.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Spinning apparatus, apparatus and process for manufacturing nonwoven fabric, and nonwoven fabric
  • Spinning apparatus, apparatus and process for manufacturing nonwoven fabric, and nonwoven fabric
  • Spinning apparatus, apparatus and process for manufacturing nonwoven fabric, and nonwoven fabric

Examples

Experimental program
Comparison scheme
Effect test

example 1

(Preparation of Spinning Liquid)

[0077]Polyacrylonitrile (manufactured by Aldrich) was dissolved in N,N-dimethylformamide so as to become a concentration of 10 mass % to prepare a spinning liquid (viscosity (temperature: 25° C.): 970 mPa·s).

(Preparation of Apparatus for Manufacturing Nonwoven Fabric)

[0078]A manufacturing apparatus as shown in FIG. 1 comprising the following parts was prepared.

(1) Supply equipment for spinning liquid: syringe

(2) Gas supply equipment: compressor

(3) Nozzles for extruding liquid (Nl1 to Nl19): metal nozzle

(3)-1 Exits for extruding liquid (El1 to El19): circular, 0.3 mm in diameter (cross-sectional area: 0.07 mm2)

(3)-2 Columnar hollows for liquid (Hl1 to Hl19): cylindrical, 0.3 mm in diameter

(3)-3 Outer diameter of nozzles: 0.55 mm each

(3)-4 Number of nozzles: 19

(4) Plate for ejecting gas (Pg): metal plate

(4)-1 Exit for ejecting gas (Eg): rectangular, 0.5 mm in width and 50 mm in length

(4)-2 Columnar hollow for gas (Hg): rectangular parallelepiped, 0.5 mm...

example 2

[0083]As a resin, a polypropylene resin [(MI=1500), Shear rate at a temperature of 200° C.: 3145 s−1, viscosity: 5000 mPa·s] was prepared.

[0084]A spinning apparatus comprising a plate for ejecting gas (Pg), which contained a columnar hollow for gas (Hg), and a plate for extruding liquid, in which columnar hollows for liquid (Hl1 to Hl67) were bored, with the cross-section as shown in FIG. 4 when the columnar hollows are cross-sectioned with a plane perpendicular to the central axis of the columnar hollow for gas (Hg), was prepared. More particularly, this spinning apparatus contained the following members.

(1) Resin supply equipment: extruder

(2) Heated gas supply equipment: compressor (compressed air was heated by a heater)

(3) Plate for extruding liquid: a set of metal plates having a wall thickness of 1 mm

(4) Exits for extruding resin liquid (El1 to El67): 67 circular exits (El1 to El67) having a diameter of 0.15 mm were arranged in a single and straight line at intervals of 5 mm, a...

example 3

[0086]A nonwoven fabric was produced under the same conditions described in Example 2, except that the amount of resin extruded was 10 g / hour / nozzle. The produced nonwoven fabric had a mass per unit area of 5 g / m2, a thickness of 150 μm, an average fiber diameter of 1100 nm, and a CV value of 0.3. The fibers which formed the nonwoven fabric were thick, but the unevenness of fiber diameters was very small.

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Abstract

Provided are a spinning apparatus capable of stably spinning fibers having a small fiber diameter with a high productivity, an apparatus comprising the same for manufacturing a nonwoven fabric, a process for manufacturing a nonwoven fabric using the nonwoven fabric manufacturing apparatus, and a nonwoven fabric produced by the process.The spinning apparatus of the present invention comprises one or more exits for extruding liquid, which are capable of extruding a spinning liquid, and one or more exits for ejecting gas, which extend linearly and are located upstream of each of the exits for extruding liquid and which are capable of ejecting a gas, wherein a shearing force by the gas and its accompanying airstream can be single-linearly exerted on the spinning liquid extruded. The apparatus of the present invention for manufacturing a nonwoven fabric comprises a fibers collection means as well as the spinning apparatus. The process of the present invention for manufacturing a nonwoven fabric is a process using the apparatus for manufacturing a nonwoven fabric. The nonwoven fabric of the present invention is a nonwoven fabric produced by the process.

Description

TECHNICAL FIELD[0001]The present invention relates to a spinning apparatus, an apparatus comprising the same for manufacturing a nonwoven fabric, a process for manufacturing a nonwoven fabric using the nonwoven fabric manufacturing apparatus, and a nonwoven fabric produced by the process.BACKGROUND ART[0002]Fibers having a small fiber diameter can impart various excellent properties, such as a separating property, a liquid-holding capacity, a wiping property, a shading property, an insulating property, or flexibility, to a nonwoven fabric, and therefore, it is preferable that fibers which form a nonwoven fabric have a small fiber diameter. As a process for manufacturing such fibers having a small fiber diameter, electrospinning is known. In this process, a spinning liquid is extruded from a nozzle, and at the same time, an electrical field is applied to the extruded spinning liquid to thereby draw the spinning liquid and thin the diameter of the spinning liquid, and fibers are direc...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): D04H3/16D01D5/08B29C48/345D01D5/04D04H1/56D04H1/736D04H3/02
CPCD01D4/025D01D5/0985D04H3/02D04H1/56D01D5/14D01D5/0069Y10T442/68
Inventor MATSUBAYASHI, YASUKOAMAGASA, MASAHIROKOJIMA, YUKIOKIMURA, KENJI
Owner NIPPON BAIRIIN
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