PAPER OR CARDBOARD LAMINATED MATERIAL AND METHOD FOR MANUFACTURING THE SAME

摘要

FIELD: pulp-and-paper industry. SUBSTANCE: paper or cardboard laminated material is composed of at least one primary volume imparting layer and at least one secondary layer placed onto at least one side of primary layer, with primary and secondary layers being connected with one another directly or indirectly over the whole area of facing surfaces. 40-90% of primary layer is composed of cellulose filaments having grinding extent of 550-950 ml CSF. Secondary layer/layers has/have greater density as compared to primary layer. Laminated material has flexure rigidity factor in the excess of 2.5 N m7/kg3 but less than 14 N m7/kg3, calculated as average geometric of values in longitudinal and transverse directions. Method allows laminated material with increased rigidity and low density to be produced. EFFECT: increased efficiency and reduced consumption of basic material. 43 cl, 9 dwg, 7 tbl, 7 ex