Cellulose-based package material having an increased adsorption capacity and process for the manufacture thereof
OwnerGabor Joo, Laszlo Tothinventors
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Abstract
The invention relates to a cellulose-based package material having an increased adsorption capacity and a process for its manufacture. According to the invention, the package material is treated in a permanent manner with an aqueous suspension containing a mixture of fulvic acid and humic acid or salts thereof in the wet technological phase (step) of the paper manufacture. The treatment is carried out in the substance or on the surface of the package material during processing. The wet product obtained can subsequently be dried to a paper, paper board, cardboard, corrugated paper or other cellulose-based laminated product.
Claims7
A cellulose-based package material having an increased absorption capacity, comprising:
- cellulose fibers having in their substance, or on their surface a mixture of fulvic acid and humic acid, or a salt thereof,
- provided that the cellulose fibers have been treated with an aqueous colloidal solution containing the mixture of fulvic acid and humic acid, or the salt thereof, and wherein the solution has a dry material content of 4-5% by weight and a strongly alkaline pH value of 11-12.
In a process for the manufacture of a cellulose-based package material having an increased adsorption capacity, the improvement of carrying out the sequential steps of:
- (a) adding to a fiber suspension or a fiber web a colloidal solution containing a mixture of fulvic acid and humic acid, or a salt thereof, in a quantity of at least 0.5% by weight, as calculated on the dry material weight of the cellulose-based package material to be manufactured;
- and
- (b) drying the fiber suspension or the fiber web.
Dependencies are inferred from the claim text.