Extensible nonwoven fabric
AssigneesFitesa Nonwoven, Inc., Fitesa Germany GmbH
InventorsStephen O. Chester, Albert Witarsa, Stefanie Streich, Helmut Hartl, Harald Siebner, Daniel Kong, David D. Newkirk
Life of this patent
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Abstract
Extensible nonwoven fabrics having improved elongation, extensibility, abrasion resistance and toughness. In particular, embodiments of the invention are directed to extensible spunbond fabrics comprising a polymeric blend of a metallocene catalyzed polypropylene, polyethylene, and a third polymer component.
Claims16
A calendering roll configured for thermally bonding fibers of a nonwoven fabric to each other to define a coherent web, the calendering roll comprising a pair of cooperating rolls in which one of the rolls consists of a plurality of 3-dimensional geometric cylindrical or rod shaped bonding patterns extending in a cross-direction of said roll, wherein said cross-direction is perpendicular to a machine direction of the calendaring roll, said bonding patterns having a length that is from about 1.5 to 10 times the width.
A system for preparing a nonwoven fabric, the system comprising:
- a first polymer source configured to provide a stream of molten or semi-molten resin;
- a first spin beam in fluid communication with the first polymer source, the spin beam
- configured to extrude and draw a plurality of continuous filaments;
- a collection surface disposed below an outlet of the spin beam onto which the continuous filaments are deposited to form a nonwoven fabrica calender roll positioned downstream of the first spin beam, the calender roll comprising a pair of cooperating rolls in which one of the rolls consists of a plurality of 3-dimensional geometric cylindrical or rod shaped bonding patterns extending in a cross-direction of said roll, wherein said cross-direction is perpendicular to a machine direction of said roll, and said bonding patterns having a length that is from about 1.5 to 10 times the width.
A calendering roll configured for thermally bonding fibers of a nonwoven fabric to each other to define a coherent web, the calendering roll comprising a pair of cooperating rolls in which one of the rolls consists of a plurality of 3-dimensional geometric cylindrical or rod shaped bonding patterns extending in a cross-direction of said roll, said bonding patterns having a length that is from about 1.5 to 10 times the width, and wherein the bond patterns cover from about 9 to 11% of the surface area of the calendering roll, and said cross-direction is perpendicular to a machine direction of said roll.
Dependencies are inferred from the claim text.