Method and device for producing tubular cellulosic spun-bonded nonwoven fabrics
AssigneeLenzing Aktiengesellschaft
InventorIbrahim Sagerer-Foric
Life of this patent
Estimating the term…
Abstract
A device for producing a seamless tubular cellulosic spunbonded nonwoven fabric, comprising a spinning dope production (8), a spinning system (2), a coagulation system (4), a deposition section (3) for depositing and dewatering the spunbonded nonwoven, a transport device (13, 22) for carrying off the spunbonded nonwoven in the transport direction, a washing system (5) and a drying system (6), wherein the deposition section (3) is designed so as to be rotatable, with the axis of rotation of the deposition section (3) lying along the transport direction.
Claims11
A device for producing a seamless tubular cellulosic spunbonded nonwoven fabric, comprising:
- a spinning dope production,
- a spinning system,
- a coagulation system,
- a deposition section for depositing and dewatering the spunbonded nonwoven,
- a transport device for carrying off the spunbonded nonwoven in a transport direction,
- a washing system and
- a drying system,
- wherein the deposition section is designed so as to be rotatable, with an axis of rotation of the deposition section lying along the transport direction.
A method of producing a seamless multi-layered tubular cellulosic spunbonded nonwoven fabric, comprising:
- processing cellulose into a spinning dope and, subsequently, extruding the spinning dope with a spinning system to form drawn filaments by using hot air, and
- moistening the drawn filaments, before a deposition, with a coagulation liquid in such a way that adhesions will form at least between the drawn filaments or across several layers during the deposition, wherein the drawn filaments are deposited on a rotating tray, dewatered, washed and dried.
A seamless tube comprising several layers of drawn cellulose filaments, wherein the cellulose filaments adhere to each other in each layer section wise, and wherein the individual layers adhere to each other section wise, with the tube being essentially free from binders.
Dependencies are inferred from the claim text.