Internal Bubble Cooling May 2026

A dedicated exhaust pipe, usually located in the middle of the die, pulls the warm air out.

In a standard blown film process, molten plastic is extruded through a circular die to form a tube, which is then inflated into a bubble. IBC systems add a sophisticated air-exchange loop inside this tube: INTERNAL BUBBLE COOLING

As this air touches the hot plastic (molten polymer), it absorbs heat. A dedicated exhaust pipe, usually located in the

Numerical Study of Internal Bubble Cooling (IBC) in Film Blowing Numerical Study of Internal Bubble Cooling (IBC) in

Fresh, often chilled air is blown into the center of the die to inflate the bubble.

is a specialized air-management technology used in blown film extrusion to increase production speed and film quality. By constantly exchanging the air inside the inflated plastic "bubble," IBC systems remove heat from the internal surface, allowing the plastic to solidify faster than with external cooling alone. How IBC Works

A complete IBC "piece" or system typically includes several integrated parts: