Process for preparing a powder of material of natural origin
AssigneesAuthentic Material, Institut National Polytechnique De Toulouse, Institut National De Recherche Pour L'agriculture, L'alimentation Et L'environnment
InventorsMargaux Jumeaux, Paul Verniolle, Antoine Rouilly, Virginie Vandenbossche
Life of this patent
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Abstract
A process for preparing a powder of a material of natural origin, which includes a step of treating a substance containing at least 70% by weight of one or more leather wastes in particle form in a twin-screw extruder, wherein a temperature profile is applied that increases from an initial temperature of between 10 and 40° C. up to a maximum temperature of between 60 and 120° C., in the presence of water in an amount such that the weight ratio of water to substance is between 0.20 and 6.
Claims17
A method for preparing a powder of a material of natural origin, comprising a step of treating an initial substance containing at least 70% by weight of leather prepared from non-human animal skin by tanning, in particulate form, in a twin-screw extruder wherein a temperature profile is applied that increases from an initial temperature of between 10° C. and 40° C. in an entry zone of the twin-screw extruder, up to a maximum temperature of between 60° C. and 120° C. in a last kneading zone of the twin-screw extruder, in the presence of water in an amount such that the weight ratio of water to said initial substance is between 0.20 and 6.
A method for preparing a powder of a material of natural origin, comprising a step of treating an initial substance containing at least 70% by weight of leather prepared from non-human animal skin by tanning, in particulate form, in a twin-screw extruder wherein a temperature profile is applied that increases from an initial temperature of between 10° C. and 40° C. in an entry zone of the twin-screw extruder, up to a maximum temperature of between 60° C. and 120° C. in a last kneading zone of the twin-screw extruder, in the presence of water in an amount such that the weight ratio of water to said initial substance is between 0.20 and 6, wherein the step of treating an initial substance is carried out in the presence of water in the amount such that the weight ratio of water relative to the initial substance is comprised between 0.2 and 0.6.
Dependencies are inferred from the claim text.