Process and apparatus for preparing a filling material, particularly for an article giving body protection
OwnerRoland A. E. Geloeninventor
Life of this patent
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Abstract
This invention relates to a process for the treatment of insulating materials in the supple, fluffy state, such as down, wherein the fluff of the down is subjected to a physical treatment adapted to take the filaments of the fluff into a substantially radial position, giving the fluff its maximum volume in which it is stabilized by the superficial deposit of a resin. The apparatus for carrying out the process comprises a dehydration enclosure in the form of a rotating drum with inner blades, hot air inlet and upper evacuation. The invention is more particularly applicable to the treatment of down for filling duvets, sleeping bags or the like.
Claims11
Process for the treatment of insulating materials in ths supple, fluffy state, such as down, and intended for filling body-protecting structures, said process comprising the step of subjecting the fluff of the down to a physical treatment adapted to take the filament of the fluff into a substantially radial position, giving the fluff its maximum volume, wherein said treatment includes a suspension of the down fluff in a dry gaseous atmosphere at a temperature of the order of 100.degree. C.
A process for treatment of insulating materials in the supple, fluffy state and comprising a plurality of filaments, such as down, and intended for filling body protection structures, the process being adapted to fix said filaments of the fluff into a substantially radial position giving the fluff its maximum volume and its maximum insulating properties, wherein said treatment comprises:
- (a) introducing the fluff in suspension in a rotating enclosure;
- (b) insufflating a stream of hot air at the base of the said enclosure while the air is evacuated at the top of said enclosure;
- (c) progressively raising the temperature of the air to about 100.degree. C. until the means hygrometric degree of the air imprisoned within each piece of the fluff has been reduced to a level of between 20 and 25% corresponding to the filaments having been placed in a substantially radial position;
- (d) stopping the introduction of hot air whilst said enclosure is maintained in rotation, maintaining the fluff in eddies, and at the same time insufflating into the volume of said enclosure a coating resin in an organic solvent in the state of mist, leading the fluff, whose filaments are in a radial position, to be regularly impregnated on the surface thereof;
- (e) evacuating the solvents at the top of said enclosure, and
- (f) insufflating hot air at about 130.degree. C. at the base of said enclosure whilst continuing to rotate said enclosure, so as to cause the polymerization of the coating resin, thereby stabilizing the fluff in expanded and developed state of the filaments.
A process for the treatment of insulating materials in the supple, fluffy state, such as down, and intended for filling body-protecting structures, comprising the successive steps of:
- (a) subjecting the material to a phase of expansion and of dehydration adapted to take the filaments of the fluff into a substantially radial position giving the fluff its maximum volume by placing in suspension in a stream of a hot gas for the time necessary to ensure thorough dehydration;
- (b) subjecting the material in the substantially anhydrous state to coating by a resin in solution in an organic solvent, the solution being projected by spraying;
- (c) subjecting the material to a phase of evaporation of the solvent and of polymerization of the coating resin in order to obtain a film covering the surface of each element.
Dependencies are inferred from the claim text.