Compression-moulded tray and method of producing a fibre tray
AssigneeSIG Technology AG
InventorsPer Sunblad, Roger Soderlund, Bengt Nordin, Lars Blecko
Life of this patent
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Abstract
A compression-moulded tray of fibre material, said tray being formed of fibre material in a compression method, from a suspension of mechanical pulp of cellulose. The formed tray has been formed by press-drying using heat to a dry content of 80-95%, preferably 90-95%, and the fibre material of the formed tray has a density in the order of 400-650 kg/m3. The inside of the tray is provided with a protective barrier.
Claims11
A method of producing a fibre tray, comprising the steps of:
- a. forming a fibre tray by immersing a dewatering tray having the shape of the tray to be produced into a bath of a suspension of mechanical pulp and dewatering the suspension in the dewatering tray, the mechanical pulp comprising at least 75% virgin fibre-based mechanical pulp from the group, CMP, CTMP, cTMP, HTCTMP and mixtures thereof;
- b. press-drying using heat the formed tray to a dry content of 80-95% and a density of 400-650 kg/m3;
- and
- c. coating the dried fibre material with a protective barrier.
A method of laminating a film or a protective barrier on a fibre material comprising at least 75% virgin fibre-based mechanical pulp from the group CMP, CTMP, cTMP, HTCTMP and mixtures thereof, comprising the steps of:
- a. press-drying using heat the fibre material to a dry content of 80-95% and a density of 400-650 kg/m3;
- b. applying said film or protective barrier on said fibre material;
- and
- c. laminating said film or protective barrier on said fibre material.
Dependencies are inferred from the claim text.