IMPREGNATION METHOD

摘要

The invention relates to calendering devices for impregnating a flexible support structure with liquid impregnating substance characterized in that said roll assembly (2) comprises two parallel horizontally aligned rolls mounted onto a calender frame (3), the said two parallel aligned rolls are positioned at a distance relative to one another defining a slit in between said rolls, wherein each roll comprises a central rotation axis (4), wherein the surface of at least one roll is a relief surface (8) defining a notched, teethed or grooved pattern; the device further comprising two lateral retaining parts (5), said retaining parts being flexibly interconnected over a pivot axis (6) such that the retaining parts are movable relative to one another in the direction of the rotation axes (4), wherein the lateral retaining parts (5) are positioned at a distance over the two parallel horizontal rolls (2), wherein the lower parts of the retaining parts are shaped to fit between the rolls (2), and wherein the area between the retaining parts in connection with the roll surfaces defines a receptacle (7) for receiving and temporarily housing the impregnating substance. The invention further relates to methods for impregnating a flexible support structure with liquid impregnating substance and to the uses of the products obtained by these methods.