Process for the production of micro-fibrous suede non-woven fabric
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United States of America Patent
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May 10, 2005
Grant Date -
Jan 15, 2004
app pub date -
Apr 10, 2003
filing date -
Apr 10, 2002
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Abstract
A process for the preparation of a micro-fibrous non-woven fabric of the suede leather type includes spinning a two-component fiber of the 'islands in the sea' type having an island component and a sea component and then preparing a felt from the two-component fiber. The felt is treated with thermal stabilization and impregnated with polyurethane from an aqueous polyurethane emulsion. The polyurethane is fixed to the felt and the sea component is removed. The felt is then impregnated with polyurethane for a second time with an aqueous emulsion or a high durability solution in organic solvent. The polyurethane is then fixed to the felt for a second time to obtain a non-woven fabric and a finishing treatment is applied to the non-woven fabric.
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