| (19) |
 |
|
(11) |
EP 0 375 924 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
28.08.1991 Bulletin 1991/35 |
| (43) |
Date of publication A2: |
|
04.07.1990 Bulletin 1990/27 |
| (22) |
Date of filing: 20.11.1989 |
|
|
| (84) |
Designated Contracting States: |
|
AT DE FR |
| (30) |
Priority: |
14.12.1988 IT 2293588
|
| (71) |
Applicant: CARTIERE SAFFA S.A. |
|
I-20121 Milano (MI) (IT) |
|
| (72) |
Inventors: |
|
- Rinaldi, Gianfranco
I-20013 Pontenuovo Di Magenta MI (IT)
- Cuono, Vincenzo
I-20013 Pontenuovo Di Magenta MI (IT)
|
| (74) |
Representative: Trupiano, Roberto |
|
BREVETTI EUROPA S.r.l.
Piazza Bernini, 6
20133 Milano (MI)
20133 Milano (MI) (IT) |
|
| |
|
| (54) |
Process for producing coated papers and coated cardboards endowed with barrier properties
against the migration of water vapour, and so obtained products |
(57) Process for producing coated papers and coated cardboards endowed with properties
of barrier against the migration of water vapour, which consists in generating on
the surface of paper and/or cardboard, at least one layer based on vinyl polymers
and/or copolymers, in submitting the surface of the so-treated paper and/or cardboard
to a suitable surface treatment for modifying its structure and for rendering said
surface wettable by water-based dispersions, preferably consisting in submitting said
surface to a corona-effect electrical discharge, and in generating at least one further
layer by means of the spreading of conventional coating substances, with a layer of
"pre-coat" being possibly interposed between bare cardboard and sad polymer-based
layer.
Coated papers and cardboards with barrier properties obtained by means of said process.