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US 11,414,241 B2Granted
Biodegradable polystyrene composites and use thereof
AssigneeKwik Lok Corporation
InventorsDonald Carrell, Donald R. Allen
Life of this patent
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Abstract
Disclosed herein are biodegradable resinous composite and extruded sheets comprising polystyrene and a thermoplastic amorphous starch and use thereof.
Claims20
A bag closure comprising:
- a flat resinous body having an access opening and a bag-holding central aperture, wherein the access opening joins the bag-holding central aperture to define a continuous space, wherein the flat resinous body is 0.02-0.09 inch thick, and wherein the flat resinous body comprises an extruded sheet of a biodegradable polystyrene composite including:
- 55-85% (w/w) polystyrene;
- and
- 15-45% (w/w) thermoplastic amorphous starch, wherein the thermoplastic amorphous starch is derived from one or more native starches without esterification and does not exhibit an X-ray diffraction peak within 20-25 degrees (2θ).
1 more element
A label comprising:
- a flat resinous body having a printable surface, wherein the flat resinous body comprises an extruded sheet of a biodegradable polystyrene composite, wherein the flat resinous body is 0.01-0.03 inch thick, wherein the biodegradable polystyrene composite includes:
- 55-85% (w/w) polystyrene;
- and
- 15-45% (w/w) thermoplastic amorphous starch;
- wherein the thermoplastic amorphous starch is derived from one or more native starches without esterification and does not exhibit an X-ray diffraction peak within 20-25 degrees (2θ).
2 more elements
Dependencies are inferred from the claim text.