Abstract:
Disclosed is an embossing roller (3) comprising an essentially cylindrical surface provided with a plurality of protuberances (3P), with non-stick surface treatment (51, 53).
Abstract:
The embossing roller has a plurality of embossing protuberances (P3), each of which has a base (41), a side surface (45) and a head surface (43). The side surface (45) of at least some of the embossing protuberances (P3) has variable inclination along the perimeter extension of the protuberance.
Abstract:
The embossing unit comprises: at least one embossing roller (3) with a rotation axis (3A) and a substantially cylindrical surface with a plurality of embossing protuberances (P3) with linear extension; a pressure roller (5) with a yielding surface (5B); an embossing nip (Gl) defined between said pressure roller (5) and said embossing roller (3); a feed path of a web material (N) extending through said embossing nip (Gl). Along the linear extension thereof the embossing protuberances (P3) have a variable inclination with respect to the rotation axis (3 A) of the embossing roller (3) and a variable cross section along the longitudinal extension of said embossing protuberances.
Abstract:
Disclosed is an embossing roller (3) comprising an essentially cylindrical surface provided with a plurality of protuberances (3P), with non-stick surface treatment (51, 53), comprising an anchoring layer (51) having a porous structure and a non-stick material (53) filling the surface porosities of the anchoring layer.