Nonwoven fabrics and method for the production thereof
First Claim
1. METHOD FOR PRODUCING A HIGH BULK LAMINATED FABRIC COMPRISING THE STEPS OF (A) PROVIDING AT LEAST ONE WATERLEAF (I) COMPRISING SYNTHETIC POLYMER FIBERS, (B) PROVIDING AT LEAST ONE WATERLEAF (II) COMPRISING SPONTANEOUSLY ELONGATABLE SYNTHETIC POLYMER FIBERS SELECTED FROM THE GROUP CONSISTING OF POLYESTERS, POLYAMIDES, POLYURETHANES, AND POLYOLEFINS, EACH OF SAID WATERLEAVES (I) AND (II) BEING SEPARATELY PREPARED BY DEPOSITING AN AQUEOUS SLURRY ONTO A PAPERMAKING SCREEN, THE FIBERS OF WATERLEAF (II) BEING SPONTANEOUSLY ELONGATABLE BY AT LEAST 3% IN LENGTH MORE THAN THE FIBERS OF WATERLEAF (I), (C) FORMING A FIBROUS BODY BY ARRANGING SAID WATERLEAVES (I) AND (II) IN A SUPERPOSED RELATIONSHIP, AND (D) FUSING SAID BODY INTO A COHERENT INTEGRAL FABRIC OF DENSIFIED AND ESSENTIALLY UNDENSIFIED PORTIONS BY APPLYING MECHANICAL LPRESSURE THERETO IN A PREDETERMINED PATTERN OF INTERSECTING LINEAL REGIONS DEFINING ENCLOSED GEOMETRICAL SHAPES LARGE ENOUGH TO PERMIT SAID WATERLEAF (II) CONTAINING SPONTANEOUSLY ELONGATABLE FIBERS TO EXPAND FREELY BEYOND THE CONFINES OF THE SAID PATTERN AND TO BUCKLE AWAY FROM SAID WATERLEAF (I) NOT CONTAINING SPONTANEOUSLY ELONGATABLE FIBERS, WHILE SIMULTANEOUSLY HEATING SAID BODY TO SPONTANEOUSLY ELONGATE FIBERS OF SAID WATERLEAF (II) BY AT LEAST 3% IN LENGTH MORE THAN THE FIBERS OF SAID WATERLEAF (I).
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1 Claim
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1. METHOD FOR PRODUCING A HIGH BULK LAMINATED FABRIC COMPRISING THE STEPS OF (A) PROVIDING AT LEAST ONE WATERLEAF (I) COMPRISING SYNTHETIC POLYMER FIBERS, (B) PROVIDING AT LEAST ONE WATERLEAF (II) COMPRISING SPONTANEOUSLY ELONGATABLE SYNTHETIC POLYMER FIBERS SELECTED FROM THE GROUP CONSISTING OF POLYESTERS, POLYAMIDES, POLYURETHANES, AND POLYOLEFINS, EACH OF SAID WATERLEAVES (I) AND (II) BEING SEPARATELY PREPARED BY DEPOSITING AN AQUEOUS SLURRY ONTO A PAPERMAKING SCREEN, THE FIBERS OF WATERLEAF (II) BEING SPONTANEOUSLY ELONGATABLE BY AT LEAST 3% IN LENGTH MORE THAN THE FIBERS OF WATERLEAF (I), (C) FORMING A FIBROUS BODY BY ARRANGING SAID WATERLEAVES (I) AND (II) IN A SUPERPOSED RELATIONSHIP, AND (D) FUSING SAID BODY INTO A COHERENT INTEGRAL FABRIC OF DENSIFIED AND ESSENTIALLY UNDENSIFIED PORTIONS BY APPLYING MECHANICAL LPRESSURE THERETO IN A PREDETERMINED PATTERN OF INTERSECTING LINEAL REGIONS DEFINING ENCLOSED GEOMETRICAL SHAPES LARGE ENOUGH TO PERMIT SAID WATERLEAF (II) CONTAINING SPONTANEOUSLY ELONGATABLE FIBERS TO EXPAND FREELY BEYOND THE CONFINES OF THE SAID PATTERN AND TO BUCKLE AWAY FROM SAID WATERLEAF (I) NOT CONTAINING SPONTANEOUSLY ELONGATABLE FIBERS, WHILE SIMULTANEOUSLY HEATING SAID BODY TO SPONTANEOUSLY ELONGATE FIBERS OF SAID WATERLEAF (II) BY AT LEAST 3% IN LENGTH MORE THAN THE FIBERS OF SAID WATERLEAF (I).
Specification
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Current AssigneeEdgar Jr James Macmillan
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Original AssigneeEdgar Jr James Macmillan
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InventorsEDGAR JR JAMES MACMILLAN
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Application NumberUS04/280,691Time in Patent Office1,777 DaysField of SearchUS Class Current162/132CPC Class CodesD04H 1/559 the fibres being within lay...D04H 1/732 by fluid current, e.g. air-layD06M 17/00 Producing multi-layer texti...Y10T 156/1039 Surface deformation only of...
