METHOD AND DEVICE FOR RELEASE SILICONIZED PAPER PRODUCTION Russian patent published in 2005 - IPC

FIELD: processes to apply liquid or fluent material to obtain an anti-friction or anti-adhesive surface, particularly to produce siliconized wrapping paper.

SUBSTANCE: method involves mixing organopolysiloxanes-based silicone composition components; applying the obtained composition on movable paper substrate; heat-treating the obtained coating up to full coating hardening. Above paper substrate is wet-strength paper web with 6-8% moisture content. The paper is preliminary subjected to calendaring operation to obtain 1.0-1.1 g/cm³ density and 250-400 sec. smoothness. Silicone composition is applied by doctoring method, wherein silicone composition from local bath is applied on paper web moving between doctor blade and rear support. At least part of rear support surface in contact area between doctor blade and rear support is resilient. Degree of paper web bending during doctor blade introduction in the rear support is regulated by change in rear support surface resiliency. Unit for silicone composition application comprises doctor and rear support having changeable resiliency at least in contact area between rear support and doctor blade. Doctor blade is installed at acute angle to line perpendicular to rear support base and passing through contact line between rear support and doctor blade. Local bath is arranged in space defined by doctor blade and paper web.

EFFECT: increased application properties and strength of the paper, provision of reliable peeling force to paper separation from adhesive layer within wide temperature range, increased quality of composition application due to increased fullness of composition introduction in surface layer of paper web.

13 cl, 2 dwg