Method for creating a fibrous substance suspension used for producing a tissue web or hygiene web

Abstract

Method and device for producing a fibrous suspension used for producing a tissue web or hygiene web. The fibers contained in the fibrous suspension are, in an online process, directly loaded with a filler in the tissue preparation line by a chemical precipitation reaction.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] The present application is a U.S. National Stage of International Patent Application No. PCT / EP2004 / 050027 filed Jan. 20, 2004, and claims priority under 35 U.S.C. § 119 of German Patent Application No. 10302783.1 filed Jan. 24, 2003.BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The invention relates to a method for creating a fibrous suspension used for producing a tissue web or a hygiene web. It further relates to tissue products made from a fibrous suspension produced according to such a method. [0004] 2. Discussion of Background Information [0005] The production of tissue requires large amounts of water, determined by the extremely low consistency or stock consistency of the fibrous suspension to be fed to the relevant paper or tissue machine. In addition, tissue is produced with a very low basis weight between 8 and 40 g / m2, depending on the respective final product, such as, e.g., cellulose wadding (8 to 30 g...

AI Technical Summary

Benefits of technology

The present invention provides a method for producing a fibrous suspension with improved efficiency and cost-effectiveness for the production of tissue or hygiene products. The method involves directly loading fibers with a filler through a chemical precipitation reaction using a "Fiber Loading™" process. The resulting fibrous suspension has higher drainability and lower water retention, which leads to faster production times and better mechanical properties of the final product. The use of a "Fiber Loading™" process allows for the replacement of conventional fillers with a crystalline precipitation product, resulting in higher efficiency and lower water retention. The method can be carried out using a treatment unit comprising a fluffer, refiner, disperger, and / or other similar equipment. The fibrous suspension can be fed to the treatment unit with a consistency ranging from 5 to 60%. The method produces individual precipitation product particles with a rhombohedral, scalenohedral, or spherical crystalline structure, depending on the temperature range and the amount of calcium hydroxide in the fibrous suspension. The use of a disperger with two plates opposite to one another and rotating relative to one another is preferred.

Problems solved by technology

The production of tissue requires large amounts of water, determined by the extremely low consistency or stock consistency of the fibrous suspension to be fed to the relevant paper or tissue machine.

As a result, the low beating degree often conflicts with the requirements regarding mechanical properties.

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