Patent ID: 11945149
Assignee: 3M INNOVATIVE PROPERTIES COMPANY
Field: Other special machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 4:
5. A method of making the coextruded article of claim 1, the method comprising:
providing an extrusion die comprising a first cavity, a second cavity, a third cavity, and a first die slot, a second die slot, and a plurality of third die slots, wherein each die slot has a distal opening, wherein there is a fluid passageway between the first cavity and the first die slot, a fluid passageway between the second cavity and a second die slot, and a plurality of fluid passageways between the third cavity and the plurality of third die slots;
providing via extrusion a first material to the first cavity of the extrusion die, a second material to the second cavity of the extrusion die, and a third material to the third cavity of the extrusion die;
extruding the layers from the distal opening of the die slots; and forming together the extrusion melt from first and second die slot with the plurality of extrudate from the third die slots into one continuous coextruded article; and
quenching the extruded layer.