Method for the production of microfibrous suede-finish non-woven fabric without using organic solvents
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United States of America Patent
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Jul 26, 2005
Grant Date -
Jan 23, 2003
app pub date -
Mar 12, 2002
filing date -
Mar 12, 2001
priority date (Note) -
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Abstract
A method of preparation of microfibrous non-woven fabric of the suede-finish type comprising the steps of: spinning of a bi-component fiber of the 'islands in the sea' type in which the 'island' comprises a polymer chosen from among those employed in textile applications while the 'sea' is a polymer that can dissolve and be removed by means of treatment with water, alkaline or acidic aqueous solutions, with non-polluting organic solvents alone or in aqueous solution; preparing a felt with the bi-component fiber; impregnating the felt with aqueous solution of polyvinylalcohol with reduced solubility in water; removing the 'sea' component by treatment with solvents step; impregnating with emulsion or polyurethane dispersion; removing the polyvinylalcohol; and finishing the non-woven fabric obtained.
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