Hydraulically needled nonwoven pulp fiber web
Patent 5137600 Issued on August 11, 1992. Estimated Expiration Date: 
November 1, 2010. 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.
November 1, 2010. 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 ReferencesInventors
AssigneeApplicationNo. 608095 filed on 11/01/1990US Classes:162/115, By fluid pressure28/105, Through backing and support members428/120, Inward from edge of web or sheet428/311.11, Void-containing component has a continuous matrix of fibers only (e.g., porous paper, etc.)428/311.51, Fibers of defined composition428/311.71CellulosicExaminersPrimary: Cannon, James C.Attorney, Agent or FirmForeign Patent References
International ClassesD04H 001/46D21H 025/04 D21H 027/00 AbstractA hydraulically needled nonwoven pulp fiber web is disclosed. This nonwoven pulp fiber web has a mean flow pore size ranging from about 18 to about 100 microns, and a Frazier porosity of at least about 100 cfm/ft2. The web may also be characterized by a specific volume ranging from about 8 to about 15 cm3 /g. The nonwoven pulp fiber web may contain a significant proportion of low-average fiber length pulp and still have a total absorptive capacity greater than about 500 percent and a wicking rate greater than about 2 centimeters per 15 seconds. The hydraulically needled nonwoven pulp fiber web may be used as a hand towel, wipe, or as a fluid distribution material in an absorbent personal care product. Also disclosed is a method of making the hydraulically needled nonwoven pulp fiber web.Other References
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