Nonwoven fabric
Patent 5254399 Issued on October 19, 1993. Estimated Expiration Date: 
December 18, 2011. 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.
December 18, 2011. 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.InventorsAssigneeApplicationNo. 808925 filed on 12/18/1991US Classes:442/351, Microfiber is synthetic polymer428/373, Bicomponent, conjugate, composite or collateral fibers or filaments (i.e., coextruded sheath-core or side-by-side type)428/397, Particular cross section442/408Hydroentangled nonwoven fabricExaminersPrimary: Bell, James J.Attorney, Agent or FirmForeign Patent References
International ClassD04H 001/58Foreign Application Priority Data1990-12-19 JPAbstractA nonwoven fabric having excellent sheet formation comprises fibers of which diameter is 7 μm or less and of which ratio of fiber length to fiber diameter (L/D) is in the range of 2000<L/Dࣘ6000, and optionally thermalbonding fibers, and the fibers being three-dimensionally entangled. A nonwoven fabric having excellent sheet formation comprises 10-90% by weight based on the weight of the nonwoven fabric of fibers of which diameter is 7 μm or less and of which L/D is 2000 or less, 90-10% by weight based on the weight of the nonwoven fabric of fibers of which diameter is 7 μm or less and of which ratio of fiber length to fiber diameter (L/D) is in the range of 2000<L/Dࣘ6000, and optionally thermalbonding fibers, the maximum pore size of the nonwoven fabric being 5 times the mean pore size or less, and the fibers being three-dimensionally entangled. | |
