EP 4110979 A1 20230104 - METHOD FOR PRODUCING SPUNBONDED FABRIC
Title (en)
METHOD FOR PRODUCING SPUNBONDED FABRIC
Title (de)
VERFAHREN ZUR HERSTELLUNG VON SPINNVLIES
Title (fr)
PROCÉDÉ DE PRODUCTION DE TISSU NON TISSÉ
Publication
Application
Priority
- EP 20159099 A 20200224
- EP 2021054493 W 20210224
Abstract (en)
[origin: WO2021170605A1] The invention relates to a method for producing spunbonded fabric (1), wherein a spinning material (2) is extruded through a plurality of nozzle holes (4) of at least one spinneret (3, 40, 50) in order to form filaments (5), and each of the filaments (5) is stretched in the extrusion direction, wherein the filaments (5) are laid on a perforated conveyor device (10) in order to form a spunbonded fabric (1), and the nozzle holes (4) of the spinneret (3, 40, 50) are arranged along a main axis (6) aligned in the transverse direction (12) relative to the conveyor direction (11) of the conveyor device (10) such that the spunbonded fabric (1) formed on the conveyor device (10) is stretched in said transverse direction (12). The aim of the invention is to allow a reliable adjustment of the spinning width and the weight distribution per surface unit of the spunbonded fabric or allow the weight distribution per surface unit to be kept constant during an ongoing operation using said method. This is achieved in that the spinning material throughput (31) of the nozzle holes (4) is variably set along the transverse direction (12).
IPC 8 full level
D01D 5/098 (2006.01); B05B 7/08 (2006.01); D01D 4/02 (2006.01); D01D 4/06 (2006.01); D01D 5/14 (2006.01); D01F 2/00 (2006.01); D04H 3/013 (2012.01); D04H 3/02 (2006.01); D04H 3/11 (2012.01); D04H 3/16 (2006.01)
CPC (source: EP US)
B05B 7/0884 (2013.01 - EP); B05B 9/0406 (2013.01 - EP); B05B 9/0423 (2013.01 - EP); B05B 13/0207 (2013.01 - EP); D01D 4/025 (2013.01 - EP US); D01D 4/06 (2013.01 - EP US); D01D 5/0985 (2013.01 - EP); D01D 5/14 (2013.01 - EP US); D01D 7/00 (2013.01 - US); D01F 2/00 (2013.01 - EP); D04H 3/013 (2013.01 - EP US); D04H 3/02 (2013.01 - EP); D04H 3/03 (2013.01 - US); D04H 3/11 (2013.01 - EP); D04H 3/16 (2013.01 - EP US); D06H 7/04 (2013.01 - US); D10B 2201/22 (2013.01 - US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
WO 2021170605 A1 20210902; CN 115103935 A 20220923; CN 115103935 B 20240528; EP 4110979 A1 20230104; TW 202146719 A 20211216; US 2023130447 A1 20230427
DOCDB simple family (application)
EP 2021054493 W 20210224; CN 202180016610 A 20210224; EP 21706949 A 20210224; TW 110106091 A 20210222; US 202117801592 A 20210224