Composite nonwoven fabric
March 23, 2021. 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 ReferencesProcess and apparatus for producing uniform fibrous web at high rate of speed Highly absorbent nonwoven fabric Carding apparatus Hydroentangling manufacturing method for hydrophilic non-wovens comprising natural fibers, in particular of unbleached cotton Patterned spunlaced fabrics containing woodpulp and/or woodpulp-like fibers Hydraulically entangled, autogenous-bonding, nonwoven composite fabric Nonwoven fabric wiper and method for making it Bio-degradable composite nonwoven fabric for plant cultivation Saturated cellulosic substrate Hydroentangled nonwoven composites InventorApplicationNo. 815527 filed on 03/23/2001US Classes:28/104, By fluid jet needling or perforating442/408Hydroentangled nonwoven fabricExaminersPrimary: Vanatta, Amy B.Attorney, Agent or FirmInternational ClassD04H 013/00AbstractA composite nonwoven fabric is formed by providing a synthetic fiber web comprising staple length polymeric fibers, and a cellulosic fiber web, preferably comprising wood pulp fibers. Prior to integration of the webs, the synthetic fiber web is subjected to hydroentangling to form a partially entangled web, with the cellulosic fiber web thereafter juxtaposed with the partially entangled web for hydroentanglement and integration of the webs. Pre-entanglement of the synthetic fiber web desirably acts to minimize the energy input required for integration of the cellulosic fiber and synthetic fiber webs, and also desirably acts to abate loss of the cellulosic fibers during hydroentanglement and integration of the webs.Field of SearchFiber entangling and interlockingBy fluid jet needling or perforating Through backing and support members To form perforations Needling Compressive manipulation To unite discrete articles or fabrics Multi-ply fabric By fluid contact Hydroentangled Separate nonwoven fabric layers comprise chemically different strand or fiber material Including a wood fiber containing layer Hydroentangled nonwoven fabric Nonwoven fabric with a preformed polymeric film or sheet Containing polymeric and natural strand or fiber materials Composite web or sheet Fiber embedded in or on the surface of a polymeric matrix Two or more layers | |
