Importance

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Abstract

Multilayer sheet (10) of the type comprising a first layer (11) and a second layer (12) superimposed and constrained to each other through adhesive material (17) interposed between them in small amounts, wherein both said layers (11, 12) are embossed; characterised in that:

said first layer (11) comprises a first (13) embossing matrix so as to make a plurality of first projections having a preset depth (d), and a second embossing matrix (15) so as to make a plurality of second projections having a greater depth (D) of said preset depth (d) of said first (13) embossing matrix;said second layer (12) comprises a first (14) embossing matrix so as to make a plurality of first projections having a preset depth (d′), and a second (16) embossing matrix so as to make a plurality of second projections having a greater depth (D′) than said preset depth (d′) of said first (14) embossing matrix;said adhesive material (17) being arranged at the contact points between said second (15) embossing matrix of said first layer (11) and said second layer (12).

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First Claim