A METHOD FOR PRODUCING A HIGH DENSITY DRY MOULDED FIBRE TUBE-SHAPED CELLULOSE PRODUCT, A FORMING MOULD, AND A TUBE-SHAPED CELLULOSE PRODUCT

Patentradars sammanfattning

The invention discloses a High Density Dry Moulded Fibre (HD-DMF) method and forming mould for producing tube-shaped cellulose products from cellulose paper material without wet processing. A rotatable shaft (second mould part) winds a predefined number of paper layers to form a tubular preform, which is then seated inside a cavity (first mould part) creating an annular forming space; a concentric tube-shaped pressing member (third mould part) then applies forming pressures exceeding 100 MPa—optionally combined with rotation and/or vibration of mould parts—to induce fibre flow and hydrogen-bond consolidation. The resulting products achieve densities above 1.30 g/cm³, can incorporate threads, varying wall thickness (>200% variation), and protruding elements, making them functionally comparable to injection-moulded plastic closures and containers.

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