EP 0885321 B1 20000510 - MELT-BLOWN NON WOVEN FABRIC, PROCESS FOR PRODUCING SAME AND THE USES THEREOF
Title (en)
MELT-BLOWN NON WOVEN FABRIC, PROCESS FOR PRODUCING SAME AND THE USES THEREOF
Title (de)
MELT-BLOWN-VLIES, VERFAHREN ZU DESSEN HERSTELLUNG UND DESSEN VERWENDUNGEN
Title (fr)
NON-TISSE DE FUSION-SOUFFLAGE, SON PROCEDE DE PRODUCTION ET SES UTILISATIONS
Publication
Application
Priority
- DE 19609143 A 19960308
- EP 9605686 W 19961218
Abstract (en)
[origin: US6207601B1] The disclosure relates to a melt-blown non-woven fabric based on cellulose esters, with fibers of mean diameter less than about 10 microns. The fabric contains 0-10 wt. % extractable softener, has a reflection factor determined according to DIN 53 145 Part I (1992) of more than 60% and the cellulose ester has a degree of substitution DS of about 1.5-3.0. The softener is preferably water-extractable. A melt-blown non-woven fabric is produced with the cellulose ester as follows: a cellulose ester, cellulose acetate, with a DS of about 1.5-3.0, in particular 1.7-2.7, is mixed with softener in a weight ratio of about 2:1 to 1:4 and simultaneously heated and melted. The mixture of softener and cellulose ester has a melting index MFI (210/2.16) according to DIN 53 735 of about 400 to 5 g/10 min., in particular 300 to 50 g/10 min. The melt is worked in a melt-blown spinning device into a melt-blown non-woven fabric and the softener is then extracted with a softener solvent to leave a proportion of 0-10 wt. %. The melt-blown non-woven fabric is especially suitable as a filter material.
IPC 1-7
IPC 8 full level
A24D 3/02 (2006.01); A24D 3/10 (2006.01); B01D 39/16 (2006.01); D01F 2/30 (2006.01); D04H 1/425 (2012.01); D04H 1/56 (2006.01); D04H 3/013 (2012.01); D04H 3/077 (2012.01); D04H 3/16 (2006.01)
CPC (source: EP US)
A24D 3/068 (2013.01 - EP US); A24D 3/10 (2013.01 - EP US); D04H 1/425 (2013.01 - EP US); D04H 3/013 (2013.01 - EP US); D04H 3/077 (2013.01 - EP US); D04H 3/16 (2013.01 - EP US); Y10T 428/298 (2015.01 - EP US); Y10T 442/60 (2015.04 - EP US); Y10T 442/607 (2015.04 - EP US); Y10T 442/668 (2015.04 - EP US); Y10T 442/68 (2015.04 - EP US)
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 9733026 A1 19970912; AT E192789 T1 20000515; AU 1302297 A 19970922; DE 19609143 C1 19971113; DE 59605210 D1 20000615; EP 0885321 A1 19981223; EP 0885321 B1 20000510; JP 3251018 B2 20020128; JP H11506175 A 19990602; US 6207601 B1 20010327
DOCDB simple family (application)
EP 9605686 W 19961218; AT 96944588 T 19961218; AU 1302297 A 19961218; DE 19609143 A 19960308; DE 59605210 T 19961218; EP 96944588 A 19961218; JP 53137997 A 19961218; US 7704498 A 19980518