Sheath/core composite materials
March 25, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3824146 Electrical laminate Polyester binder fibers Packing material Partially oriented nylon yarn and process Sheath core composite extrusion and a method of making it by melt transformation coextrusion Permanently plasticized, cellulose-based product Sheath core fiber and its method of manufacture Patent #: 5009954 InventorsAssigneeApplicationNo. 857374 filed on 03/25/1992US Classes:428/373, Bicomponent, conjugate, composite or collateral fibers or filaments (i.e., coextruded sheath-core or side-by-side type)428/370, Composite428/374, Fibers or filaments nonconcentric (e.g., side-by-side or eccentric, etc.)428/375, Coated or with bond, impregnation or core428/393CellulosicExaminersPrimary: Ryan, PatrickAssistant: Edwards, N. Attorney, Agent or FirmInternational ClassD02G 003/00AbstractRayon/nylon and other sheath/core composite fibers or other materials, with good adhesion between sheath and core resulting from an adhesion promoter. The adhesion promoter is difunctional and sterically hindered. Fumaric acid and terephthalic acid are preferred adhesion promoters for the composite fibers or other materials, because each compound has both difunctionality and steric hinderance, allowing either to form covalent bonds to both the sheath and the core. Fibers produced in accordance with this invention may be used to produce fabrics which have the strength and wrinkle resistance shown by a number of synthetic fibers, but with the water absorption characteristics of natural fibers such as cotton.Other References
Field of SearchCompositeBicomponent, conjugate, composite or collateral fibers or filaments (i.e., coextruded sheath-core or side-by-side type) Fibers or filaments nonconcentric (e.g., side-by-side or eccentric, etc.) Coated or with bond, impregnation or core Artificial fiber or filament Cellulosic Synthetic resin or polymer Polyamide, polyimide or polyester | |
