Avery Dennison Corporation

Stephen C Huff

Luigi Sartor

Daniel Meyer

Craig N Kishi

Jesse C Ercillo

Kuolih Tsai

Frank Yen-Jer Shih

Adrian J Hulme

Robert S Dordick

Bert R Potjer

Wen-Chen Su

Aad Van Zanten

Hongjie Guo

William Kray

Alexander Jansen

Arnooud H Kettenis

Disclosed herein is a multilayer silicone release surface comprising a backing, a support layer on the backing, and a silicone layer of the support layer. The various layers of the multilayer release surface are deposited substantially simultaneously, as for example by a dual die or using curtain coating techniques.

Method for forming multilayer release liners

A method for simultaneously coating multiple thin layers of relatively viscous fluids comprises the relative adjustment of the viscosity of the fluids in order to achieve a viscosity ratio in the optimum range without adversely affecting the adhesive properties of the fluids. In the preferrred method, viscosity is adjusted by varying the temperature of one or both fluids prior to coating and/or by reformulating the liquids to vary their relative viscosities.

Method of multilayer die coating using viscosity adjustment techniques

A method for simultaneously coating multiple thin layers of relatively viscous fluids comprises the adjustment of the pressure gradients in the interface region between two confluent flows. In particular, the pressure gradient along the middle lip is regulated so as to not be excessively positive, in order to position the separating line of the top flow at a particular point on the die lips, thus enhancing stable flow. In one aspect of the method, a step configuration is designed into the die lips so that the downstream lip steps away from the web in the direction of web travel. In another aspect of the method, the pressure gradient at various locations in the bead is controlled by beveling the upstream and downstream lips. In yet a further aspect of the present method, the viscosities of the two liquids being coated are matched at the relevant shear rates to promote good coating quality.

Method for multilayer coating using pressure gradient regulation

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Chino Hills, CA, United States of America

Stephen C Huff