METHOD AND DEVICE FOR COATING A SUBSTRATE TO PROVIDE IT WITH ANTIADHESIVE PROPERTIES, USING A CROSS-LINKABLE SILICON COMPOSITION

摘要

The invention concerns a method for antiadhesive treatment by continuous coating of a paper strip, said coating containing a silicon composition with base of polyorganosiloxanes (POS) of the FC/LTC type. Said method consists in the use of a POS A, a crosslinking agent B (hydrosilylation and/or dehydrogenation-polycondensation), a catalyst C, and optionally, an inhibitor D, an adherence modulator E and other compounds F. Said constituents A to F are continuously mixed in measured amounts, the mixing conditions being selected such that the bath average life DVB is < 10H, that the bath homogeneity is such that its DSC (Differential Scanning Calorimetry) curve comprises a Gaussian peak, and such that the production flow rate of the A to F mixture is such that the duration d separating the moment when the constituents A, B and C are brought into the presence of one another and the moment when the mixture is applied to the unwinding strip, is not more than DVB. Said method also comprises the step (2) of conveying the composition to the coating site, the step (3) of coating the paper strip with the composition and the heat curing step (4).