Nonwoven fabric of netting and thermoplastic polymeric microfibers
AssigneeHercules Incorporated
InventorJoseph V. Marra
Life of this patent
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Abstract
A composite nonwoven fabric-like laminate which includes an integrated mat of polymeric microfibers having a diameter of less than 30 microns and a layer of nonwoven linearly oriented thermoplastic netting, the mat and netting being either continuously bonded or spot-bonded to produce a laminate with the desired properties.
Claims10
A nonwoven fabric-like material comprising at least one integrated mat of generally discontinuous, thermoplastic polymeric microfibers, said mat including randomly laid, discontinuous filaments having an average filament diameter between about 0.5 micron and about 30 microns and having a basis weight of between about 10 and about 50 grams per square meter and at least one layer of nonwoven continuous, linearly oriented thermoplastic netting having at least two sets of strands wherein each set of strands crosses another set of strands at a fixed angle and having uniformly sized openings, said netting and said integrated mat bonded together by heat and pressure to form a multi-layer nonwoven fabric of substantially uniform thickness.
A nonwoven fabric-like material comprising
- at least one layer of a network structure having a plurality of parallel continuous main filaments extending in a first direction and having a substantially uniform cross-section and being substantially uniformly and continuously oriented, and a plurality of discontinuous parallel tie filaments extending in a second direction different from said first direction, said tie filaments interconnecting said main filaments and having no substantial portion thereof crossing over said main filaments, each of said tie filaments between each pair of adjacent main filaments having its longitudinal axis in said second direction in axial alignment with the longitudinal axis in said second direction of the adjacent tie filament;
- and an integrated mat of generally discontinuous thermoplastic polymeric microfibers, said mat including randomly laid discontinuous filaments having an average filament diameter of between about 0.5 micron and about 30 microns and having a basis weight of between about 10 and 50 grams per square meter;
- said thermoplastic netting and said integrated mat being bonded together by heat and pressure to form a multi-layer nonwoven fabric of substantially uniform thickness.
Dependencies are inferred from the claim text.