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US 12,509,565 B2Granted
Biodegradable foams and methods of foam production
AssigneeCruz Foam, Inc.
InventorsWilliam Thomas Lewczyk, Juan Manuel Bravo
Life of this patent
Estimating the term…
Abstract
A foam comprising starch and urea is described. A composition of the foam, by weight percent, includes a starch weight percent representative of the starch included in the foam and a urea weight percent representative of the urea included in the foam. The starch weight percent is greater than the urea weight percent.
Claims16
A foam, comprising:
- starch;
- urea, wherein a composition of the foam is characterized by a starch weight percent representative of the starch included in the foam and a urea weight percent representative of the urea included in the foam, and wherein the starch weight percent is greater than the urea weight percent;
- and
- glycerol, glycerol monostearate, and chitosan, wherein the composition of the foam is further characterized by a glycerol weight percent, a glycerol monostearate weight percent, and a chitosan weight percent respectively representative of the glycerol, glycerol monostearate, and chitosan included in the foam,
- wherein the urea weight percent is greater than the glycerol weight percent, the glycerol monostearate weight percent, and the chitosan weight percent, and wherein the urea weight percent is greater than 10%.
2 more elements
A method of foam manufacturing, comprising:
- inputting starch, urea, glycerol, glycerol monostearate, and chitosan into an extruder proximate to a first end of the extruder;
- and
- outputting, from a second end of the extruder different than the first end, a foam formed from the starch, urea, glycerol, glycerol monostearate, and chitosan, wherein the foam has a density of less than one g/cm3, wherein a composition of the foam is characterized by a starch weight percent, a urea weight percent, a glycerol weight percent, a glycerol monostearate weight percent, and a chitosan weight percent respectively representative of the starch, urea, glycerol, glycerol monostearate, and chitosan included in the foam, wherein the starch weight percent is greater than the urea weight percent of the urea, wherein the urea weight percent is greater than the glycerol weight percent, the glycerol monostearate weight percent, and the chitosan weight percent, and wherein the urea weight percent is greater than 10%.
Dependencies are inferred from the claim text.