US 7,097,904 B2 · Porous fiber

Abstract

The present invention provides a nanoporous fiber being substantially free from coarse pores and having homogeneously dispersed nanopores, unlike conventional porous fibers. A porous fiber has pores each having a diameter of 100 nm or less, in which the area ratio of pores each having a diameter of 200 nm or more to the total cross section of the fiber is 1.5% or less, and the pores are unconnected pores, or a porous fiber has pores each having a diameter of 100 nm or less, in which the area ratio of pores each having a diameter of 200 nm or more to the total cross section of the fiber is 1.5% or less, the pores are connected pores, and the fiber has a strength of 1.0 cN/dtex or more.

Claims15

Dependent claims

A polymer alloy fiber having an islands-in-sea structure and comprising a lower soluble polymer as a sea part;

and a higher soluble polymer as islands parts, the islands constituting a lined structure, wherein the area ratio of islands each having a diameter of 200 nm or more to the total islands is 3% or less.

Dependencies are inferred from the claim text.

Facts

Application

10/523,416Filed 28 Jul 2003

Priority

JP 2002-2276195 Aug 2002

Published

US 2005/0260911 A124 Nov 2005

Granted

29 Aug 2006

Term ends

Not estimatedThe source records don’t support an estimate.

Classification33 codes

D01F 6/84
From copolycondensation products: from copolyesters
B29C 48/362
Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die: using static mixing devices
B29C 48/40
Using screws surrounded by a cooperating barrel, e.g. single screw extruders: using two or more parallel screws or at least two parallel…
D01D 5/247
With a hollow structure; Spinnerette packs therefor: discontinuous hollow structure or microporous structure

Porous fiber

Life of this patent

Porous fiber

Life of this patent

Abstract

Claims15