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US 12,134,215 B2Granted
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.
Claims21
A method for manufacturing a cellulose product having a non-flat shape comprising the steps of:
- providing a cellulose product forming apparatus comprising a forming mould;
- dry forming a cellulose blank in a dry forming unit;
- arranging the cellulose blank in the forming mould, the forming mold comprising a stiff forming mould part and a multi-use membrane, where the multi-use membrane constitutes a seal for a pressure media or fluid contained in a pressure chamber wherein the stiff forming mould part comprises a positive stiff forming mould part and a negative stiff pressure mould part, and wherein a shape of the multi-use membrane in a natural state corresponds to the shape of the negative stiff pressure mould part and/or positive stiff 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 via the pressure media or fluid.
3 more elements
Dependencies are inferred from the claim text.