Patent ID: 11873149
Assignee: SOFRESH, INC.
Field: Other special machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 14:
15. A method for manufacturing the film of claim 14, comprising:
combining a molten transmission polymer, a first molten tie polymer, a molten barrier polymer, a second molten tie polymer, an a molten sealant polymer in a feedblock;
co-extruding the molten transmission polymer, the first molten tie polymer, the molten barrier polymer, the second molten tie polymer, and the molten sealant polymer from the feedblock through an annular die to form a multi-layered extruded melt, wherein:
the molten transmission polymer is extruded as a transmission layer on the inside of the multi-layered extruded melt,
the molten sealant polymer is extruded as a sealant layer on the outside of the multi-layered extruded melt,
the molten barrier polymer is extruded as a barrier layer in between the transmission layer and the sealant layer of the multi-layered extruded melt,
the first molten tie polymer is extruded as a first tie layer in between the transmission layer and the barrier layer, and
the second molten tie polymer is extruded as a second time layer in between the barrier layer and the sealant layer;

injecting an inert gas through a hole in the center of the annular die to cause the multi-layered extruded melt to expand into a bubble,
pulling the bubble continuously from the annular die;
dispensing at least one active agent in the interior of the bubble using an atomizer,
ablating one side of the interior of the bubble using a laser, and
collapsing the ablated bubble by pulling the bubble between a pair of nip rollers, wherein the bubble self-adheres to form the film.