Process for producing nonwoven with improved surface properties

A hydroentangled nonwoven sheet material can be produced by a process which comprises: 0) optionally providing a polymer web on a carrier, a) providing an aqueous suspension containing short fibres and a surfactant; b) depositing the aqueous suspension on the carrier, c) removing aqueous residue of...

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Bibliographische Detailangaben
Hauptverfasser:	Strandqvist, Mikael, Ahoniemi, Hannu
Format:	Patent
Sprache:	eng
Schlagworte:	BRAIDING COTTON-WOOL FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS IMPREGNATING OR COATING OF PAPER KNITTING LACE-MAKING MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL METHODS OF PRODUCING PAPER THEREON NON-WOVEN FABRICS PAPER NOT OTHERWISE PROVIDED FOR PAPER-MAKING PAPER-MAKING MACHINES PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D PRODUCTION OF CELLULOSE PULP COMPOSITIONS TEXTILES TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G TRIMMINGS WADDING
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Beschreibung
Zusammenfassung:	A hydroentangled nonwoven sheet material can be produced by a process which comprises: 0) optionally providing a polymer web on a carrier, a) providing an aqueous suspension containing short fibres and a surfactant; b) depositing the aqueous suspension on the carrier, c) removing aqueous residue of the aqueous suspension deposited in step b) to form a fibrous web, b') depositing aqueous suspension on a surface of the fibrous web formed in step c), c') removing aqueous residue of the aqueous suspension deposited in step b') to form a combined fibrous web, d) hydroentangling the combined fibrous web, and optionally e) drying the hydroentangled web, and/or f) further processing and finalising the dried, hydroentangled web the web to produce the nonwoven end material. The hydroentangled non-woven sheet material obtainable by this process has a low degree of surface irregularity and contains low residues of surfactants.