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Force spun sub-micron fiber and applications

a technology of force spun sub-micron fibers and fibers, applied in the direction of melt spinning methods, synthetic resin layered products, manufacturing tools, etc., can solve the problems of commercial inacceptability of methods, and achieve the effects of increasing the surface area of resins, reducing fiber diameters, and increasing performance benefits

Inactive Publication Date: 2015-01-22
SABIC GLOBAL TECH BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent is about a process called force spinning that can make very small fibers out of various materials. By doing this, the surface area of the fibers is increased, which improves their performance in certain applications. The process is efficient and can produce large quantities of ultra-fine fibers. The technical effect is better performance of certain materials in applications that require small fibers.

Problems solved by technology

Electro-spinning of these resins is possible, but the cost of the resin and the slow throughput rate of this process have made this method commercially unacceptable.
This has been a barrier to the introduction and testing of many of these resins suitability for use in these applications.

Method used

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  • Force spun sub-micron fiber and applications
  • Force spun sub-micron fiber and applications
  • Force spun sub-micron fiber and applications

Examples

Experimental program
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Effect test

example 1

[0053]A solution comprising of 25 wt. % ULTEM® 1010 dissolved in NMP, with a solution viscosity of about 6,000 cP was spun through an orifice diameter of 159 μm (30 G) at a spinneret speed of 12,000 RPM. This example resulted in fiber diameter between 3.0 μm and 115 nm with an average fiber diameter of 1.1 μm.

[0054]FIG. 4A is an image showing the fiber morphology obtained according to Example 1. FIG. 4B is a histogram showing fiber measurements obtained according to Example 1.

example 2

[0055]A solution comprising of 25 wt. % ULTEM® 1010 dissolved in NMP, with a solution viscosity of about 6,000 cP was spun through an orifice diameter of 210 μm (27 G) at a spinneret speed of 6,000 RPM. This example resulted in fiber diameter between 1.4 μm and 32 nm with an average fiber diameter of 650 nm.

[0056]FIG. 5A is an image showing the fiber morphology obtained according to Example 2. FIG. 5B is a histogram showing fiber measurements obtained according to Example 2.

example 3

[0057]A solution comprising of 25 wt. % ULTEM® 1000 dissolved in NMP, with a solution viscosity of about 10,000 cP was spun through an orifice diameter of 210 μm (27 G) at a spinneret speed of 11,000 RPM. This example resulted in fiber diameter between 2,8 μm and 150 nm with an average fiber diameter of 850 nm.

[0058]FIG. 6A is an image showing the fiber morphology obtained according to Example 3. FIG. 6B is a histogram showing fiber measurements obtained according to Example 3.

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Abstract

A process of forming a non-woven web including spinning a plurality of continuous polymeric filaments including a polyetherimide component selected from polyetherimide homopolymers, polyetherimide co-polymers, aromatic polyester homopolymers, aromatic polyester copolymers, and combinations thereof at a rate of at least 300 grams / hour / spinneret. The continuous filaments have a diameter ranging from 50 nanometer to 5 microns, preferably 50 nanometers to 2 microns.

Description

CROSS-REFERENCES TO RELATED APPLICATIONS[0001]This application claims benefit under 35 U.S.C. §119(e) to U.S. Provisional Patent Application Ser. No. 61 / 847,433 filed on Jul. 17, 2013, which is hereby incorporated by reference in its entirety.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The invention relates generally to a process of forming a non-woven web including spinning a plurality of continuous polymeric filaments including a polyetherimide component, and more specifically to forming the non-woven web at a rate of at least 300 grams / hour / spinneret.[0004]2. Description of the Related Art[0005]Polyetherimide (PEI) has been converted into fibers using the melt spinning process for some time. This is capable of producing fibers in the range of 10-20 microns. Melt blown has also been attempted with PEI, and there is currently work being done to make this process amenable to using PEI. If the technical hurdles could be overcome here, this would be capable of prod...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): D04H5/02D04H3/005D01D5/08D04H3/016
CPCD01D5/08D04H5/02D04H3/016D10B2505/04D10B2331/06D10B2509/00D04H3/005D01F6/84D01F6/765D01F1/10D01D5/18D01F6/665D04H3/009D04H3/03D01D5/04D01F6/74
Inventor LABELLE, JACOBPETERS, RICHARDTEUTSCH, ERICH
Owner SABIC GLOBAL TECH BV