Method of making foam material
OwnerKun-Huang Changinventor
Life of this patent
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Abstract
A method of making foam material includes a process of impregnating comminuted particles of a previously formed foam material with a first foaming reaction solution made up of polyol, catalyst and additives and with a second foaming reaction solution containing diisocyanate. The comminuted particles are also subjected to a rolling pressure when they are being impregnated with the first foaming reaction solution. The impregnated particles are transferred to a forming area provided with steam serving to accelerate the foaming reaction of the impregnated particles. The foam material so produced is provided with excellent properties.
Claims2
A method of making foam material comprising steps of:
- (a) comminuting a previously formed foam material into particles;
- (b) drying said particles to obtain dried particles;
- (c) impregnating said dried particles with a first foaming reaction solution made up of polyol, catalyst and additives so as to obtain first impregnated particles and at the same time rolling and pressing said first impregnated particles so as to obtain rolled particles;
- (d) mixing said rolled particles with a second foaming reaction solution containing a predetermined quantity of diisocyanate so as to obtain second impregnated particles;
- and
- (e) transferring said second impregnated particles to a forming area provided with steam and using steam to facilitate foaming of said second impregnated particles.
Dependencies are inferred from the claim text.