Method For Producing Extensible Paper, Plant For Implementing The Method, Product Obtained By The Method, And Paper Material Obtained From The Product
AssigneeCartiere Cariolaro S.p.A.
InventorsGiorgio Trani, Marion Sterner, Federico Cariolaro
Life of this patent
Estimating the term…
Abstract
The paper web is passed on the production line between at least one pair of rollers, of which one is of soft material driven at greater speed, the hard material roller presenting a base roughness RA of less than 5 and along its entire lateral surface having incisions that are precisely spaced.
Claims11
A method for producing substantially smooth extensible paper, comprising passing the paper web on the production line between at least one pair of rollers, of which one is of soft material driven at lesser speed and one is of hard material driven at greater speed, the hard material roller presenting a base roughness RA of less than 5 and comprising, in its entire lateral surface, incisions having the following parameters:
- distance A between adjacent incisions
- 0.24-16 mm
- width B of each incision
- 0.02-0.2 mm
- depth C of each incision
- 0.02-0.1 mm.
A plant for producing substantially smooth extensible paper, comprising:
- a kneader for the fibre-based mix,
- a refining unit,
- a flow chest,
- a paper web forming station,
- a pressing station,
- a first drying station,
- a compacting station,
- a second drying station,
- a glazing station,
- wherein the compacting station comprises at least one pair of rollers, one of which is of soft material and is driven at a lower speed than the other roller which is of hard material, this latter presenting a base roughness RA<5, and comprising incisions in its entire lateral surface.
A paper material consisting of a sheet of smooth paper having an impermeabilizing film.
Dependencies are inferred from the claim text.