FIELD: pulp-and-paper industry.
SUBSTANCE: method involves preparing cellulose suspension; providing flocculation and draining of suspension on netted surface; molding and drying of resultant sheet. Flocculation of suspension is provided by introducing of water-soluble polymer selected from the group consisted of polysaccharide and synthetic polymer with characteristic viscosity of at least 4 deciliter/g. Repeated flocculation procedure is provided by adding of system including silicon-containing material and water-soluble polymer. According to one of versions, silicon-containing material is added before or simultaneously with water-soluble polymer. According to other version, water-soluble polymer is of anionic kind of polymers, which is added before introduction of silicon-containing material.
EFFECT: improved draining and holding procedures facilitating adequate conditions for paper and cardboard molding procedure.
18 cl, 2 tbl, 4 ex
| Title | Year | Author | Number |
|---|---|---|---|
| PAPER AND CARDBOARD MANUFACTURE PROCESS | 2000 |
|
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|
RU2350561C2 |
| PRODUCTION OF PAPER WITH FILLER | 2008 |
|
RU2431709C2 |
