Hydroentangled nonwoven composites
Patent 6022818 Issued on February 8, 2000. Estimated Expiration Date: 
April 2, 2016. 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.
April 2, 2016. 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 ReferencesInventorsAssigneeApplicationNo. 627837 filed on 04/02/1996US Classes:442/384, Hydroentangled15/209.1, Wiper, dauber, or polisher28/104, By fluid jet needling or perforating28/105, Through backing and support members442/389, Separate nonwoven fabric layers comprise chemically different strand or fiber material442/408, Hydroentangled nonwoven fabric442/415, Containing at least two chemically different strand or fiber materials442/417, Including particulate material other than strand or fiber material604/374, Cellulose or cellulosic materials604/378Containing layers having differing absorption characteristics (e.g., flow control, wicking, etc.)ExaminersPrimary: Cannon, James C.Attorney, Agent or FirmForeign Patent References
International ClassesA61F 013/46B32B 005/08 B32B 005/26 B32B 005/30 AbstractDisclosed herein is an entangled nonwoven composite made from absorbent fibers such as wood pulp fibers and matrix fibers such as polyolefin staple fibers. The absorbent fibers are entangled with the matrix fibers in such a manner so that the composite has an absorbent-rich side and a matrix-rich side. Intermediate the two exterior sides there is an entangled interior portion made from a mixture of the absorbent and matrix fibers. The composite is particularly well-suited for use in multifunctional handling of fluids such as, for example, body fluids which are absorbed by personal care absorbent articles. The matrix fiber portion of the composite acts as a fluid intake region while the absorbent fiber portion acts as a fluid retention region and the portion of the composite intermediate the two exterior surfaces acts as a fluid transfer region.Other References
Field of SearchBy fluid jet needling or perforatingThrough backing and support members Containing layers having differing absorption characteristics (e.g., flow control, wicking, etc.) Cellulose or cellulosic materials Wiper, dauber, or polisher Hydroentangled Separate nonwoven fabric layers comprise chemically different strand or fiber material Hydroentangled nonwoven fabric Containing at least two chemically different strand or fiber materials Including particulate material other than strand or fiber material | |
