Abstract:
La présente invention se rapporte à un procédé de fabrication d'un article biodégradable comprenant les étapes suivantes : a) fourniture d'un mélange de poudre présentant une granulométrie comprise entre 2 et 4 mm et un taux d'humidité compris entre 10 % et 25 %, b) mise en forme dudit mélange au moyen d'une presse pour appliquer une pression comprise entre 50 et 90 Tonnes sur le mélange pour obtenir un mélange mis en forme, l'étape b) de mise en forme étant réalisée à une température comprise entre 150 et 180 °C; c) cuisson à une température comprise entre 150 °C et 250 °C dudit mélange mis en forme pour former l'article biodégradable.
Abstract:
A method for forming cellulose products (1) from an air-formed cellulose blank structure (2) in a rotary forming mould system (3), wherein the rotary forming mould system (3) comprises a base structure (4) and one or more forming moulds (5) attached to the base structure (4), wherein the base structure (4) is arranged to rotate around a rotational axis (AR) extending in an axial direction (DA), wherein each forming mould (5) comprises a first mould part (5a) and a corresponding second mould part (5b), wherein during rotational movement of the base structure (4) around the rotational axis (AR) each first mould part (5a) is arranged to engage with its corresponding second mould part (5b) in a pressing direction (DP), wherein the method comprises the steps; providing the air-formed cellulose blank structure (2); arranging the cellulose blank structure (2) in a position between a first mould part (5a) and its corresponding second mould part (5b); forming the cellulose products (1) from the cellulose blank structure (2) in the rotary forming mould system (3), by applying a forming pressure (PF) on the cellulose blank structure (2) between the first mould part (5a) and its corresponding second mould part (5b) through an engaging movement of the first mould part (5a) in relation to its corresponding second mould part (5b) in the pressing direction (DP), wherein during forming the one or more forming moulds (5) are rotating with the base structure (4) around the rotational axis (AR).
Abstract:
A method for sterilizing and decontaminating post-consumer absorbent products polluted with organic compounds derived from human metabolism including drug residues, said post-consumer absorbent sanitary products comprising fractions of plastic, super-absorbent polymers (SAP), and optionally cellulose, the method comprising at least the steps of: sterilizing (SR) said absorbent sanitary post-consumer products by heating to a temperature equal to or less than 140°C, and to a pressure lower than 4 bar, decontaminating (DC) said post-consumer absorbent sanitary products of organic compounds by treating with an oxidizing composition comprising at least one compound selected from the group consisting of hydrogen peroxide, sodium percarbonate, potassium percarbonate, sodium perborate, potassium perborate, potassium monopersulfate, ammonium persulfate, sodium persulfate, potassium persulfate, and ozone. The at least one compound is contained in said oxidizing composition in an amount equal to or greater than 2% by weight with respect to the dry weight of the post-consumer absorbent sanitary products.