Method for preparing a nonwoven web
AssigneeSuominen Oyj
InventorsGian Luca Polosa, Muralidhar Lalagiri, Laura LaPlante, Miika Nikinmaa, Avinav G. Nandgaonkar
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Abstract
The present invention relates to a method for producing a nonwoven fabric. The method according to the invention comprises forming a nonwoven web using a wet lay forming process, hydroentangling the web and providing the web with a high quality hydroembossed pattern. The invention also concerns a nonwoven fabric exhibiting a three dimensional pattern, which remains even in wet wipes prepared from the material.
Claims16
A method for producing a nonwoven fabric comprising a three-dimensional pattern thereon, the method comprising:
- forming a first web from an aqueous suspension of fibers on a wire support;
- hydroentangling the first web to provide a self-supporting web;
- transferring the self-supporting web from the wire support to a hydroembossing roll in a way in which the self-supporting web supports itself during the transfer;
- hydroembossing the self-supporting web via the hydroembossing roll, the hydroembossing roll comprising a sleeve associated with the roll, the sleeve having a negative impression of the three-dimensional pattern within a body thereof, wherein the hydroembossing comprises moving a portion of the fibers of the self-supporting web into the negative impression of the sleeve to form the three-dimensional pattern on the self-supporting web;
- and
- drying the self-supporting web to provide the nonwoven fabric comprising the three-dimensional pattern thereon.
A method for producing a nonwoven fabric comprising a three-dimensional pattern thereon, the method comprising:
- forming a first web from an aqueous suspension of fibers on a wire support;
- hydroentangling the first web to provide a self-supporting web;
- removing the self-supporting web from the wire support;
- hydroembossing the self-supporting web via a hydroembossing roll comprising a sleeve associated with the roll, the sleeve having a negative impression of the three-dimensional pattern within a body thereof, wherein the hydroembossing comprises moving a portion of the fibers of the self-supporting web into the negative impression of the sleeve to form the three-dimensional pattern on the self-supporting web;
- and
- drying the self-supporting web to provide the nonwoven fabric comprising the three-dimensional pattern thereon,
- wherein the hydroentangling is done at a speed of 500-1100 ft/min, a nozzle pressure of 1-1200 psi, with a nozzle size of 80-150 micron, and at a vacuum pressure of 1-450 mbar.
Dependencies are inferred from the claim text.