Nanofiber aggregate, polymer alloy fiber, hybrid fiber, fibrous structures, and processes for production of them

A nanofiber and alloy fiber technology, applied in the direction of single-component synthetic polymer rayon, fiber treatment, fiber chemical characteristics, etc., can solve the problems of nanofiber application prospect restrictions, difficult operation, and drawing out fibers

Inactive Publication Date: 2006-01-11
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with this method only a cotton-like mass of nanofibers is obtained, from which it is impossible to draw fibers
In addition, the polymers used are limited to polycondensation polymers such as addition polymerization PE, polyester and polyamide. Since dehydration is necessary during the polymerization process, it is difficult to operate in principle.
Therefore, the application prospects of nanofibers obtained by this method are also greatly restricted.

Method used

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  • Nanofiber aggregate, polymer alloy fiber, hybrid fiber, fibrous structures, and processes for production of them
  • Nanofiber aggregate, polymer alloy fiber, hybrid fiber, fibrous structures, and processes for production of them
  • Nanofiber aggregate, polymer alloy fiber, hybrid fiber, fibrous structures, and processes for production of them

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0304] The melt viscosity is 53Pa s (262 ℃, shear speed 121.6 seconds -1 ), the end of the amine with a melting point of 220°C is capped with acetic acid, and the amount of the end group of the amine reaches 5.0×10 -5 Molar equivalent / g of N6 (20% by weight); and a melt viscosity of 310 Pa·s (262°C, shear rate 121.6 seconds -1 ), 8 mol% of isophthalic acid with a melting point of 225°C, and 4 mol% of bisphenol A are copolymerized into a copolymerized PET (80% by weight) with a melting point of 225°C, and are mixed at 260°C with a twin-screw extrusion mixer , get b * Polymer alloy slices with value=4. In addition, the copolymerized PET at 262 ° C, 1216 seconds -1 The melt viscosity is 180Pa·s. The mixing conditions at this time are as follows:

[0305] Screw type Full engagement in the same direction, 2 screws

[0306] Screw diameter 37mm, effective length 1670mm, L / D=45.1

[0307] The length of the mixing section is 28% of the effective length of the screw

...

Embodiment 2

[0319] Except for N6, the melt viscosity is 212Pa·s (262°C, the shear speed is 121.6 seconds -1 ), the end of the amine with a melting point of 220°C is capped with acetic acid, and the amount of the end group of the amine reaches 5.0×10 -5 Except the N6 (20% by weight) of molar equivalent / g, operate in the same way as in Example 1, obtain b with twin-screw extrusion mixer * Polymer alloy slices with value=4. In addition, except that the discharge rate of each single hole is 1.0g / min, the shear stress between the nozzle hole wall and the polymer is 0.071MPa (the viscosity of the polymer alloy is 170Pa·s, 262°C, and the shear speed is 416 seconds -1 ) except that melt spinning was carried out in the same manner as in Example 1 to obtain undrawn polymer alloy yarns. The spinnability at this time was good, and the yarn was broken once during 1 t of spinning. And except that the draw ratio of the undrawn polymer alloy fiber is 3.0 times, drawing is carried out in the same manne...

Embodiment 3

[0324] Except for N6, the melt viscosity is 500Pa·s (262°C, the shear speed is 121.6 seconds -1 ) and N6 (20% by weight) with a melting point of 220° C. were melt-spun in the same manner as in Example 2. Then, except that the shear stress between the nozzle hole wall and the polymer is 0.083MPa (the viscosity of the polymer alloy is 200Pa·s, 262°C, 416 seconds -1 ) except that melt spinning was carried out in the same manner as in Example 1 to obtain undrawn polymer alloy yarns. The spinnability at this time was good, and the yarn was broken once during 1 t of spinning. Moreover, stretching and heat treatment were carried out in the same manner as in Example 2, and the obtained polymer alloy fiber had 128 decitex, 36 filaments, a strength of 4.5cN / dtex, an elongation of 37%, U%=1.9%, and a shrinkage in boiling water 12% excellent characteristics. The results of TEM observation of the cross-section of the obtained polymer alloy fiber show that, as in Example 1, a sea-island ...

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Abstract

The invention provides an aggregate of nanofibers which is not limited in shape or material polymer, is widely applicable and developable, and has a small dispersion of single fiber fineness, and a process for the production thereof. The invention relates to an aggregate of nanofibers which have a number-average single fiber fineness of 1 x 10<-7> to 2 x 10<-4> dtex and a proportion of single fibers having single fiber fineness ranging from 1 x 10<-7> to 2 x 10<-4> dtex of 60 % or above and which are made of a thermoplastic polymer.

Description

technical field [0001] The present invention relates to nanofiber assemblies. The invention also relates to polymer alloy fibers that are precursors to nanofiber assemblies. The present invention also relates to mixed fibers and fiber structures containing nanofiber aggregates. Moreover, this invention also relates to the manufacturing method of these. Background technique [0002] Polyester represented by polyethylene terephthalate (hereinafter referred to as PET) and polybutylene terephthalate (hereinafter referred to as PBT), or nylon 6 (hereinafter referred to as N6) and nylon 66 (hereinafter referred to as Polycondensation polymers such as polyamide represented by N66 for short) have been suitable for use as clothing materials and industrial raw materials because of their moderate mechanical properties and heat resistance. On the other hand, addition-polymerized polymers represented by polyethylene (hereinafter referred to as PE) and polypropylene (hereinafter referr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/00D01F8/00D06M11/00D06M13/00C08L101/00D04H1/00D21H15/00
Inventor 越智隆志木代明野中修一
Owner TORAY IND INC
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