EP 1948751 A1 20080730 - METHOD FOR PRODUCING LOW ANISOTROPY PRESSURE-SENSITIVE ADHESIVES
Title (en)
METHOD FOR PRODUCING LOW ANISOTROPY PRESSURE-SENSITIVE ADHESIVES
Title (de)
VERFAHREN ZUR HERSTELLUNG VON HAFTKLEBEMASSEN GERINGER ANISOTROPIE
Title (fr)
PROCEDE POUR PRODUIRE DES MATIERES AUTO-ADHESIVES A FAIBLE ANISOTROPIE
Publication
Application
Priority
- EP 2006068016 W 20061101
- DE 102005054054 A 20051110
Abstract (en)
[origin: WO2007054455A1] The invention relates to a method for producing pressure-sensitive adhesives that have low or no anisotropy, the process elements including an adhesive supply system, an application unit and a placement element. A melt strip of the pressure-sensitive adhesive is produced between the outlet of the application unit and the point of placement on the placement element and is stretched. The invention is characterized by controlling the stretching of the pressure-sensitive adhesive in the free melt strip by adjusting an effective ratio G which is defined as the ratio of the effective time ?t of the stretching to the stretching rate R, and which is adjusted to a value of not more than 0.008 s<SUP>2</SUP>. The effective time ?t is defined by the formula 2Lr/[v<SUB>strip</SUB>(1 +r)] wherein L is the length of the melt strip, r is the stretching ratio and v<SUB>strip</SUB> is the speed of the melt strip, and the stretching rate R is defined as a temporal derivative of the stretching ratio r.
IPC 8 full level
CPC (source: EP US)
C09J 7/10 (2017.12 - EP US); C09J 7/20 (2017.12 - EP US); C09J 9/00 (2013.01 - EP US); C09J 133/04 (2013.01 - EP US); C09J 2433/00 (2013.01 - EP US); Y10T 428/28 (2015.01 - EP US)
Citation (search report)
See references of WO 2007054455A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
DE 102005054054 A1 20070516; EP 1948751 A1 20080730; US 2008226905 A1 20080918; WO 2007054455 A1 20070518
DOCDB simple family (application)
DE 102005054054 A 20051110; EP 06819215 A 20061101; EP 2006068016 W 20061101; US 9089606 A 20061101