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US 2024/0239975 A1Published application
Home-compostable biopolyester blown film
AssigneePlastic Suppliers, Inc. dba Earthfirst
InventorsTom Bowden, Ed Tweed
Life of this patent
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Abstract
A method for producing a home compostable biopolyester blown film including a biopolyester and enzymes for improved compostability. Enzymes are added during the extrusion process. To maintain temperature, the blown film process is enclosed and uses a climate control system to maintain temperature and climate within the enclosures.
Claims20
A method of making a home-compostable biopolyester blown film, the method comprising:
- melting a bulk polymer material to form a molten mass having a first viscosity;
- increasing the viscosity of the molten mass to a second viscosity;
- applying one or more enzymes to the molten mass within a climate-controlled enclosure;
- forming a bubble from the molten mass within the climate-controlled enclosure;
- and
- collapsing the bubble to form a film within the climate-controlled enclosure.
3 more elements
A home-compostable biopolyester blown film comprising:
- a biopolyester selected from the group consisting of polyhydroxyalkanoate (PHA), polylactic acid (PLA) (such as poly(L-lactic acid) (PLLA), poly(D-lactic acid) (PDLA), poly(D,L-lactic acid) (PDLLA) or PLA stereocomplex (scPLA)), polyglycolic acid (PGA), polycaprolactone (PCL), polybutylene succinate (PBS), polybutylene succinate adipate (PBSA), polybutylene adipate terephthalate (PBAT), and derivatives or combinations thereof;
- a wax;
- and
- an enzyme.
1 more element
Dependencies are inferred from the claim text.