Absorbent articles having soft, strong nonwoven component
November 30, 2015. 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 3081500 3408709 3509009 3545054 3855046 Product and process for producing a stretchable nonwoven material from a spot bonded continuous filament web Apparatus for producing articles of reinforced plastics or like constructions Nonwoven fabric and method and apparatus for producing the same Process for making an apertured nonwoven fabric Process for stretching incremental portions of an orientable thermoplastic substrate and product thereof InventorsAssigneeApplicationNo. 565461 filed on 11/30/1995US Classes:604/370, Thermoplastic428/198, Spot bonds connect components442/394, Nonwoven fabric with a preformed polymeric film or sheet442/401, Spun-bonded nonwoven fabric604/358Absorbent pad for external or internal application and supports therefor (e.g., catamenial devices, diapers, etc.)ExaminersPrimary: Zuttarelli, P.Attorney, Agent or FirmForeign Patent References
International ClassesA61F 013/15A61F 013/20 B32B 027/14 D04H 001/04 AbstractA nonwoven that is exceptionally soft yet sufficiently strong for use in absorbent articles is disclosed. The soft, strong nonwoven includes fibers comprising polyethylene, at least a portion of which are consolidated. The soft, strong nonwoven has a cross-machine direction tensile strength of at least about 300 g/in and a cross-machine direction elongation at break of at least about 40%.The soft, strong nonwoven is preferably formed by permanently stretching an inelastic base nonwoven in the cross-machine direction. The preferred base nonwoven has certain properties which allow it to have sufficient strength after stretching, while being exceptionally soft, such that the resultant permanently stretched, soft, strong nonwoven is particularly suitable for use as a topsheet or a back sheet component in disposable absorbent articles. More specifically, the preferred base nonwoven has a cross-machine direction elongation at break of at least about 175% and a cross-machine direction tensile strength of at least about 400 g/in. A particularly preferred base nonwoven also has a filament denier of from 1.5 to 10, a basis weight of from 15 to 30 gsy, and, for thermal point bonded nonwovens, a consolidation area of from 4 to 40%.Field of SearchAbsorbent pad for external or internal application and supports therefor (e.g., catamenial devices, diapers, etc.)Containing fiber or material bonding substance Thermoplastic Thermoplastic Synthetic resin Spot bonds connect components Including textile, cloth or fabric With formation of filaments With stretching Bonding of facing continuously contacting laminae at spaced points only Strands, rods, tubes or sticklike bodies to each other only Stretching by applying tension Biaxial or transverse to travel direction | |
