Continuous filament nonwoven fabric and method of manufacturing the same
AssigneeJohnson & Johnson
InventorCarlyle Harmon
Life of this patent
Estimating the term…
Abstract
A new continuous filament nonwoven fabric wherein: a portion of the filaments are substantially randomly deposited, at least partially molecularly oriented crystalline synthetic polymer filaments; and another portion of the filaments are cross-linked polymerized materials which act as a bonding agent for the fabric.
Claims14
A new nonwoven fabric comprising a layer of substantially continuous, randomly disposed, filaments, a portion of said filaments being at least partially molecularly oriented, crystalline, synthetic polymer and another portion of said filaments being electron beam radiation cross-linked polymerized materials selected from the class consisting of the unsaturated polyester polymers, the unsaturated polyurethane polymers, the unsaturated epoxy bis-phenol A resins, modified silicones, unsaturated acrylate copolymers, block copolymers of styrene and butadiene and mixtures thereof, said cross-linked polymerized filaments being bonded to each other and to said molecularly oriented filaments to produce a unitary web.
A method of producing a spunbond fabric comprising;
- simultaneously extruding a synthetic fiber-forming, molecularly orientable polymer and a cross-linkable polymerizable material selected from the class consisting of the unsaturated polyester polymers, the unsaturated polyurethane polymers, the unsaturated epoxy bis-phenol A resins, modified silicones, unsaturated acrylate copolymers, block copolymers of styrene and butadiene, and mixtures thereof, said polymers being extruded through a spinnerette to form filaments with the cross-linkable polymerizable material being extruded in orifices uniformly disposed amongst orifices extruding said fiber-forming polymer, drawing said fiber-forming polymer filaments to at least partially orient said filaments, collecting both the fiber-forming polymer filaments and the other filaments on a permeable movable conveyor in web form containing randomly disposed filaments and treating said web with electron beam radiation to cross-link the cross-linkable polymer and bond the filaments together to produce a strong, durable, nonwoven fabric.
Dependencies are inferred from the claim text.