Method and device for the production of multilayer paper and related products
AssigneePerini Navi S.p.A.
InventorFabio Perini
Life of this patent
Estimating the term…
Abstract
The equipment for the production of a paper web material comprises: a first former (1) for forming a first layer (S1) consisting of a slurry containing fibers and water; a second former (2) for forming a second layer (S2) consisting of a slurry containing fibers and water; a third former (3) for forming a third layer (S3) consisting of a slurry containing fibers and water; and a creping device (50A, 50B) for wet creping of the third layer.
Claims39
Method for the production of a multilayer tissue paper sheet, comprising stages of:
- forming a wet first layer including first slurry with at least fibers and water;
- forming a wet second layer including a second slurry with at least fibers and water;
- forming a wet third layer including a third slurry with at least fibers and water;
- creping at least said wet third layer in the wet causing said layer to shorten in a feeding direction;
- placing said third creped layer between said first layer and said second layer when said layers are wet to form a multilayer product comprising said first, second and third layers;
- drying said multilayer product.
Equipment for the production of a multilayer tissue paper sheet material, comprising:
- a first tissue layer former for forming a first tissue layer including a slurry with at least fibers and water;
- a second tissue layer former for forming a second tissue layer including a slurry with least fibers and water;
- a third tissue layer former for forming a third tissue layer including a slurry with at least fibers and water;
- a creping device for wet creping of said third tissue layer, causing a shortening of said third layer in the feeding direction;
- a conveyor for transporting the first, second and third layers while wet, from respective said tissue layer formers, said first, second and third tissue layer formers being arranged relative to each other and said conveyor to cause said first, second and third layers being placed on one another while wet, with said third layer arranged between said first and second layers to form a multilayer product.
A multilayer tissue paper sheet comprising a first and second non-creped layer of fibers, between which a third layer of fibers is placed, said third layer of fibers being formed and creped in the wet, such as to shorten it, separately from said first and second layers prior to combining with said first and second layers.
A method for producing a multi-layered tissue product, the method comprising the steps of:
- forming a wet first outer tissue layer with a slurry including fibers and liquid;
- forming a wet middle tissue layer with a slurry including fibers and liquid;
- creping said middle tissue layer while wet causing said middle tissue layer to shorten in a feeding direction and form a wet creped middle tissue layer;
- placing said wet creped middle tissue layer on said wet first outer tissue layer while said layers are wet;
- forming a wet second outer tissue layer with a slurry including fibers and liquid;
- placing said wet second outer tissue layer on said wet creped middle tissue layer while said layers ae wet to form a wet multilayer tissue product;
- drying said wet multi-layered tissue product to produce a dry multi-layered tissue product.
A multi-layered tissue paper product formed by the process comprising the steps of:
- providing a wet first outer tissue layer;
- wet creping said wet first outer tissue layer;
- providing a wet middle tissue layer;
- wet creping said wet middle tissue layer separately from said creping of said first outer tissue layer;
- providing a second outer tissue layer that is non-creped;
- combining said first and second outer tissue layers with said middle tissue layer being between said first and second outer tissue layers while said layers are wet.
A multi-layered tissue paper product formed by the process comprising the steps of:
- providing a wet first outer tissue layer;
- providing a wet middle tissue layer;
- wet creping said wet middle tissue layer while said wet middle tissue layer is wet;
- combining said wet outer tissue layers with said wet creped middle tissue layer being between said first and second outer tissue layers to form a three layer combination;
- drying said three layer combination;
- dry creping said dried three layer combination.
Dependencies are inferred from the claim text.