Dispersible nonwoven fabric and method of making same
March 31, 2017. 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 31825 3616797 3654928 3913579 Nonwoven fabric Flushable binder system for pre-moistened wipers wherein an adhesive for the fibers of the wipers interacts with ions contained in the lotion with which the wipers are impregnated Method of making a bonded nonwoven web Hydroentangled disintegratable fabric Recreped absorbent products and method of manufacture Hydraulically needled nonwoven pulp fiber web Inventors
ApplicationNo. 829085 filed on 03/31/1997US Classes:442/65, Each major face of the fabric has at least one coating or impregnation28/104, By fluid jet needling or perforating162/112, With coating and/or laminating442/154, Coating or impregnation contains an acrylic polymer or copolymer (e.g., polyacrylonitrile, polyacrylic acid, etc.)442/408Hydroentangled nonwoven fabricExaminersPrimary: Copenheaver, BlaineAttorney, Agent or FirmForeign Patent References
International ClassesD04H 001/46D04H 001/58 AbstractA soft, absorbent nonwoven fibrous web, such as a wet wipe, capable of dispersing in an aqueous environment into unrecognizable pieces, made by a method comprising the steps of forming a wet-laid nonwoven web from an aqueous slurry of fibers; hydraulically needling the wet-laid nonwoven web; partially drying the hydraulically needled web; applying a binder composition to one side of the web; creping the web such that interfiber adhesion is disrupted and z-direction fiber orientation is introduced; optionally applying a binder composition to the second side of the web; recreping the web; drying and curing the web; and, converting the dried and cured web into a wet wipe, dry wipe, or other absorbent article. In the case of a wet wipe, a solution containing about 100 ppm of calcium ion is applied to the web, such as in a preserving solution. In the case of a dry wipe, the calcium ion is added after the binder is added to the web, and the final product is stored in a dry state. The combination of processes produces a web having desirable tensile strength, bulk and softness during storage and use, yet will disperse in an aqueous environment into unrecognizable pieces.Other References
Field of SearchWith coating and/or laminatingBy fluid jet needling or perforating Hydroentangled nonwoven fabric Coating or impregnation is water absorbency-increasing or hydrophilicity-increasing or hydrophilicity-imparting Coating or impregnation specified as porous or permeable to a specific substance (e.g., water vapor, air, etc.) Each major face of the fabric has at least one coating or impregnation Coating or impregnation contains an acrylic polymer or copolymer (e.g., polyacrylonitrile, polyacrylic acid, etc.) | |
