EP 0628650 B1 19990804 - Process for manufacturing supportless and release agent free thermally activated nonwovens
Title (en)
Process for manufacturing supportless and release agent free thermally activated nonwovens
Title (de)
Verfahren zur Herstellung von träger- und trennmittelfreien, thermoaktivierbaren Vliesen
Title (fr)
Procédé pour la fabrication sans support et sans agents anti-adhésifs d'un non tissé themofusible
Publication
Application
Priority
DE 4318887 A 19930607
Abstract (en)
[origin: CA2125076A1] A PROCESS FOR THE PRODUCTION OF HEAT-ACTIVATABLE MATS FREE FROM SUPPORTS AND RELEASE AGENTS AND THEIR USE FOR BONDING VARIOUS SUBSTRATES A b s t r a c t The invention relates to a process for the production of heat-activatable mats based on hydroxyl polyester polyurethanes which are free from supports and release agents and which have viscosities of 600 to 3500 mPa.s, measured as solution viscosity in methyl ethyl ketone (15% Brookfield LVT viscosimeter, spindle 3, 60 r.p.m., 23.degree.C) and weights per unit area of 5 to 200 g/m2, characterized in that the mats are produced by melt blowing (for example REICOFIL? melt blowing process) at melt temperatures in the range from 230 to 260.degree.C using a receiving conveyor belt of which the constituent material has a surface tension of 18.5x10-5 N/cm to 46x10-5 N/cm. The mats produced by the process according to the invention can be wound into rolls without blocking despite the absence of release agents or spacers and are eminently suitable for bonding various substrates.
IPC 1-7
IPC 8 full level
B32B 27/08 (2006.01); B32B 27/12 (2006.01); B32B 27/40 (2006.01); C09D 175/06 (2006.01); C09J 7/00 (2006.01); C09J 175/00 (2006.01); C09J 175/06 (2006.01); D01F 6/70 (2006.01); D04H 1/435 (2012.01); D04H 1/4358 (2012.01); D04H 1/56 (2006.01); D04H 1/724 (2012.01); D04H 3/009 (2012.01); D04H 3/16 (2006.01)
CPC (source: EP)
D04H 1/435 (2013.01); D04H 1/4358 (2013.01); D04H 1/724 (2013.01); D04H 3/009 (2013.01); D04H 3/16 (2013.01)
Designated contracting state (EPC)
CH DE ES FR GB IT LI
DOCDB simple family (publication)
DE 4318887 A1 19941208; CA 2125076 A1 19941208; DE 59408568 D1 19990909; EP 0628650 A1 19941214; EP 0628650 B1 19990804; ES 2136140 T3 19991116; JP H07310270 A 19951128
DOCDB simple family (application)
DE 4318887 A 19930607; CA 2125076 A 19940603; DE 59408568 T 19940525; EP 94108039 A 19940525; ES 94108039 T 19940525; JP 14069394 A 19940601