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Extrusion Blown Film

Blown Film Extrusion ProcessBlown film is an extrusion process used to make films that are typically defined as being less than 10 mils in thickness, although blown film can be produced in much thicker gauges. The process involves extrusion of a plastic through a circular die, followed by "bubble-like" expansion. This process is used to produce a wide variety of products including simple mono-layer films and very complex multi-layer structures.

Typical Medical Applications:  IV Bags

Typical Processing Conditions for Blown Film
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Polymers
Extruder Temperatures °F(°C)
Melt/Die °F(°C)
Air Ring/IBC °F(°C)
BUR
Drying Temp °F(°C) 
Drying Time, hr
Die Gap, mil (mm)
Data
Sheet
MSDS
Z1
Z2
Z3
Z4
Z5
450(232)
450(232)
450(232)
450(232)
450(232)
460 (238)
40(4)-60(16)
~2/1
150 (66)
4-8
60 (1.524)
450(232)
450(232)
450(232)
450(232)
450(232)
460 (238)
40(4)-60(16)
~2/1
160 (71)
4-6
60 (1.524)
Eastman Embrace™
450(232)
450(232)
450(232)
450(232)
450(232)
460 (238)
40(4)-60(16)
~2/1
130 (54)
4-8
60 (1.524)
400
430-460
430-460
430-460
430-460
430-460
40(4)-60(16)
~2/1
150 (166)
4-8
50 (1.27)-100 (2.54)
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