Method for manufacturing a cellulose product, cellulose product forming apparatus and cellulose product
AssigneePulPac AB
InventorsOve Larsson, Linus Larsson
Life of this patent
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Abstract
A method for manufacturing a cellulose product, comprising the steps: dry forming a cellulose blank in a dry forming unit; arranging the cellulose blank in a forming mould; heating the cellulose blank to a forming temperature in the range of 100° C. to 200° C.; and pressing the cellulose blank in the forming mould with a forming pressure of at least 1 MPa.
Claims10
A method for manufacturing a cellulose product, comprising the steps:
- dry forming a cellulose blank comprising cellulose and a member selected from the group consisting of starch, fluorochemicals, alkyl ketene dimer (AKD), alkenyl succinic anhydride (ASA), rosin (acidic sizing), wax, lignin and water glass (sodium silicate) in a dry forming unit,
- arranging the cellulose blank in a forming mould wherein the forming mould comprising a positive forming mould part and a negative forming mould part;
- heating the cellulose blank to a forming temperature in the range of 100° C. to 200° C.;
- and
- pressing the cellulose blank in the forming mould with a forming pressure of at least 1 MPa, characterized in that, when dry forming the cellulose blank in the dry forming unit, cellulose fibres are carried and formed to the cellulose blank by air as carrying medium, wherein the cellulose blank is formed as a continuous cellulose web in the dry forming unit, wherein the continuous cellulose web is intermittently fed to the forming mould by a feeding unit and
- wherein the cellulose blank is formed into a cellulose product having a three-dimensional shape.
A cellulose product forming apparatus for manufacturing a cellulose product having a three-dimensional shape from a cellulose blank comprising cellulose and a member selected from the group consisting of starch, fluorochemicals, alkyl ketene dimer (AKD), alkenyl succinic anhydride (ASA), rosin (acidic sizing), wax, lignin and water glass (sodium silicate), the cellulose product forming apparatus comprising:
- a heating unit configured for heating the cellulose blank to a forming temperature in the range of 100° C. to 200° C.;
- a forming mould comprising a positive forming mould part and a negative forming mould part and configured to form the cellulose product by pressing the cellulose blank in the forming mould with a forming pressure of at least 1 MPa;
- characterized in that the cellulose product forming apparatus further comprises a dry forming unit for forming the cellulose blank, where the cellulose fibres are carried and formed to the cellulose blank by air as carrying medium wherein the forming mould is adapted to form the cellulose blank into a cellulose product having a three-dimensional shape and where the apparatus is configured such that cellulose blank is a continuous cellulose web in the dry forming unit, wherein the continuous cellulose web is intermittently fed to the forming mould by a feeding unit.
Dependencies are inferred from the claim text.