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Ultrafine fiber production method

A technology of ultra-fine fibers and manufacturing methods, which is applied in the fields of fiber processing, rayon manufacturing, and fiber chemical characteristics, and can solve problems such as difficulty in application, high manufacturing costs, and difficulty in improving manufacturing efficiency.

Active Publication Date: 2018-11-23
KAO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, since the solvent needs to be volatilized, it is not easy to improve the production efficiency
In addition, since the volatilized solvent needs to be recovered, the manufacturing cost becomes high
Furthermore, it is extremely difficult to apply this method to resins such as polyethylene or polypropylene that are not easily soluble in solvents by their nature.

Method used

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  • Ultrafine fiber production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0123] use figure 1 The melt electrospinning apparatus 10 shown produces ultrafine fibers made of a raw material resin (resin composition) in which polypropylene (PP) and additives are mixed. As the polypropylene, PolyMirae's MF650Y (melting point: 160° C.) was used. As an additive, Acrybase (registered trademark) FCA-201-PS type of Fujikura Kasei Co., Ltd., which is a styrene acrylic resin having a quaternary ammonium salt group, was used. The decomposition temperature of this additive is 276°C. The additive was blended 5% with respect to the total mass of the polypropylene resin and the additive. The electrical impedance of the raw material resin is shown in Table 1. The discharge nozzle base 13 and the discharge nozzle tip 14 in the melt electrospinning device 10 are made of stainless steel (SUS303). The heating temperature of the cylinder in the casing 11 of the melt electrospinning device 10 was set to 220°C. The raw material resin is melt-kneaded in the casing 11 . ...

Embodiment 2 to 4

[0125] Ultrafine fibers were produced in the same manner as in Example 1 except that the additives were replaced with the components described in Table 1. The average fiber diameter of the ultrafine fibers was 2040 nm. The decomposition temperature of the additive in Example 2 is 349°C, the decomposition temperature of the additive in Example 3 is 315°C, and the decomposition temperature of the additive in Example 4 is 329°C.

Embodiment 5

[0127] Ultrafine fibers were produced in the same manner as in Example 2, except that the compounding amounts of the additives in Example 2 were replaced with the compounding amounts described in Table 1. The average fiber diameter of the ultrafine fibers was 1270 nm.

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Abstract

An ultrafine fiber production method according to the present invention includes a step in which an electric field is formed between a discharge nozzle that discharges a starting material resin, and acharged electrode that is positioned apart from the discharge nozzle, and the starting material resin heated and melted in the electric field is fed from the starting material discharge nozzle and spun. The starting material resin is a resin mixture including an additive and a resin with a melting point, and satisfies formula (1): A / B>=1.0*102. In the formula, A represents the absolute value (Omega) of the electrical impedance of the starting material resin at 50 DEG C. B represents the absolute value (Omega) of the electrical impedance of the starting material resin at a temperature 50 DEG Chigher than the melting point of the starting material resin.

Description

technical field [0001] The present invention relates to a method for producing ultrafine fibers using an electrospinning method. Background technique [0002] Electrospinning is commonly used in the manufacture of nanofibers. In the electrospinning method, a high voltage is applied to a solution or melt of a resin as a raw material of nanofibers to form fibers. In the electrospinning method using a resin solution, a resin solution is filled in a syringe, and a high voltage is applied between a nozzle attached to the tip of the syringe and a collector provided at a predetermined distance from the nozzle. The resin solution is ejected from the syringe, during which the solvent volatilizes, and the resin as the solute solidifies and forms nanofibers while being elongated and deformed by the potential difference, and is attracted to the collector. In this method, since it is necessary to volatilize the solvent, it is not easy to improve the production efficiency. In addition,...

Claims

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Application Information

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IPC IPC(8): D01D5/08D04H1/728
CPCD04H1/728D01D5/08D01D5/0023D01D5/0069D01F1/02D01F6/06D01F6/46D01F6/62D01F6/92D01D5/003C08J3/201D01D1/04D01D5/0092D01F8/06D01F8/14D10B2321/022D10B2331/04
Inventor 甘利奈绪美东城武彦齐藤公二铃木大也米田敬太郎向井健太
Owner KAO CORP
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