Process and apparatus for producing a voluminous nonwoven fabric
AssigneeFARE' S.P.A. a socio unico
InventorRosaldo FARE'
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Abstract
Provided is a process for producing a nonwoven fabric. The process includes extruding a plurality of filaments from a spinneret, the filaments being at least bicomponent filaments; depositing the filaments to form a nonwoven fabric on an element collecting the filaments; performing a bonding of the nonwoven fabric; increasing the thickness of the nonwoven fabric by crimping at least part of the filaments by heating the nonwoven fabric; and, preferably performing a setting of the nonwoven fabric, wherein the bonding and the increasing the thickness steps are performed substantially simultaneously by means of a heated calendar. Also provided is the nonwoven fabric formed using the process and an apparatus for carrying out the process.
Claims20
A process for producing a nonwoven fabric (150), comprising the steps of:
- (a) extruding a plurality of filaments (100) from a spinneret (1a), said filaments being at least bicomponent filaments;
- (b) depositing said filaments (100) to form a nonwoven fabric (150) on an element collecting the filaments;
- (c) performing a bonding of said nonwoven fabric (150);
- (d) increasing the thickness (H2) of said nonwoven fabric (150) by crimping at least part of the filaments (100) by heating said nonwoven fabric (150);
- and
- (e) performing a setting of said nonwoven fabric (150);
- wherein said steps (c) and (d) are performed substantially simultaneously by means of a heated calendar (20).
A calendar (20) for the treatment of nonwoven fabrics, comprising heating elements (200) and configured to define, on a nonwoven fabric, a bonding area between 5% and 25%, said calendar comprising a number between 4 and 50 protrusions per cm2.
Dependencies are inferred from the claim text.