Patent ID: 9713894
Date: 2017-07-25
CPC Classifications: B29C,B29L,B32B

Claim:
1. A die assembly for producing a film, the die assembly operatively connectable to an extruder having a thermoplastic material passing therethrough, the die assembly comprising: a pair of die plates connectable together to define a manifold receptacle and an elongate outlet therebetween; a manifold positionable in the manifold receptacle between the pair of die plates and defining a plurality of film channels therebetween, the plurality of film channels converging into the elongate outlet, the thermoplastic material extrudable through the plurality of film channels and the elongate outlet to form a multi-layer film; and a plurality of nozzles positionable between the plurality of film channels and having a tip extending into the elongate outlet and to an exit of the elongate outlet, the plurality of nozzles operatively connectable to a source of channel fluid for emitting the channel fluid between layers of the multi-layer film whereby microcapillaries are formed in the multi-layer film.