US 12,070,885 B2
Method for manufacturing renewable film and products
Thomas Joseph Schweiss, Ingleside, IL (US); and Douglas Duane Bonke, Appleton, WI (US)
Assigned to REYNOLDS CONSUMER PRODUCTS LLC, Lake Forest, IL (US)
Filed by REYNOLDS CONSUMER PRODUCTS LLC, Lake Forest, IL (US)
Filed on Jun. 10, 2022, as Appl. No. 17/837,813.
Prior Publication US 2023/0398727 A1, Dec. 14, 2023
Int. Cl. B29C 48/10 (2019.01); B29C 48/00 (2019.01); B29C 48/275 (2019.01)
CPC B29C 48/10 (2019.02) [B29C 48/0018 (2019.02); B29C 48/277 (2019.02)] 20 Claims
OG exemplary drawing
 
1. A method of manufacturing a film comprising:
forming a blend, wherein the blend comprises: (i) a renewable content starch, (ii) a renewable content mineral comprising oolitic aragonite, and (iii) polyethylene;
operating a mass flow hopper to maintain a consistent mass flow rate of the blend to a feed throat of an extruder;
operating a screw of the extruder at a speed, wherein the speed is based on the amount by weight of (i) the renewable content starch and (ii) the renewable content mineral within the blend;
operating the extruder at a melt temperature, wherein the melt temperature is based on the amount by weight of (i) the renewable content starch and (ii) the renewable content mineral within the blend;
causing a melt of the blend to pass through a screen pack and a die, wherein the mesh rating of the screen pack is based on the amount by weight of (i) the renewable content starch and (ii) the renewable content mineral within the blend;
cooling the melt into a film after the melt passes through the die; and
nipping the film to a gauge such that the film can be formed into a bag.