FIBRILLAR MICROSTRUCTURE AND METHODS FOR MAKING IT

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FIBRILLAR MICROSTRUCTURE AND METHODS FOR MAKING IT
Publication Number: WO/2006/029194 International Application No.: PCT/US2005/031831
Publication Date: 16.03.2006 International Filing Date: 02.09.2005

Int. Class.: D06N 3/00 (2006.01), B32B 37/00 (2006.01), B32B 5/08 (2006.01), B81C 1/00 (2006.01), D04H 11/00 (2006.01)
Applicants: E.I. DUPONT DE NEMOURS AND COMPANY [US/US]; 1007 Market Street, Wilmington, Delaware 19898 (US) (All Except US).
VAN TRUMP, James, Edmond [US/US]; 770 Oakway Circle, Ashland, Oregon 97520 (US) (US Only).
Inventor: VAN TRUMP, James, Edmond [US/US]; 770 Oakway Circle, Ashland, Oregon 97520 (US).
Agent: LANGWORTHY, John, A.; E. I. Du Pont de Nemours and Company, Legal Patent Records Center, 4417 Lancaster Pike, Wilmington, Delaware 19805 (US).
Priority Data: 60/607,325 03.09.2004 US

Abstract:
Method for making a fibrillar microstructure comprising providing a plurality of composite filaments, each of them comprising domains of a first polymer dispersed within a matrix of a second polymer, forming a fabric from the filaments, removing the matrix polymer from the fabric with a liquid solvent and removing the solvent by lyophilization or by displacing it with a drying liquid that is below its critical point and removing this drying liquid by converting it to a gas above its critical point.