Method of manufacturing a multilayer fibrous product

Details Method of manufacturing a multilayer fibrous product Method of manufacturing a multilayer fibrous product

2007-09-11

2011-11-01

Hug, Eric (Department: 1741)

Paper making and fiber liberation

Processes and products

Multi-layer waterlaid webs or sheets

C162S125000, C162S129000, C162S149000, C162S189000, C162S191000

Reexamination Certificate

active

08048266

ABSTRACT:
A method of manufacturing a multilayer fibrous product. The product comprises at least two overlapping layers, each of which has a different fiber composition, and in the production of the product, chemical short stock is used at least partly. In the method, short stock is brought to a screening stage where fines, which pass a screen having an average hole size of 0.2-1.5 mm, are separated from it, in order to prepare at least two fiber fractions having different fiber compositions, and the fractions generated are recovered and included in different layers of the same fibrous product. With the invention, it is possible to screen an initial material and form a product which has better properties than a corresponding product, the initial material pulp of which has only been refined.

REFERENCES:
patent: 4781793 (1988-11-01), Halme
patent: 4888092 (1989-12-01), Prusas et al.
patent: 6391154 (2002-05-01), Nygard et al.

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