Montedison S.p.a.

Domenico Lori

Lino Credali

Paola Massari

Federico Milani

Paolo Parrini

Mario Milano

Emilio Martini

Polyolefinic compositions endowed with a high impact strength, comprising:

Polyolefinic compositions with a high impact strength

Moisture-resistant packing cardboard of the corrugated type is prepared from flat paper sheets formed from 10% to 90% by weight of cellulose fibers and from 90% to 10% by weight of fibrils of at least one thermoplastic polymer and having a surface area greater than 1.0 m.sup.2 /gm, by heating the sheets under pressure on an undulated surface and coupling the resulting corrugated or undulated sheets with one or more flat sheets to which the corrugated sheet is adhered through the tips of the corrugations or undulations.

Process for preparing moisture-resistant packing cardboard

Composite sheets comprising a layer of cellulosic fibers and a layer adjacent thereto consisting in whole or in part of thermoplastic fibers are made to adhere by superimposing the sheets on the side of the cellulosic fibers layer and by inserting between such layers a film of a thermoplastic polymer having:

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Ferrara, Italy

Domenico Lori