| 摘要 |
<p>An extruded and inflated tubular film(1) is continuously drawn off while chilling with a coolant(5) to which an atomized fluid(9,10) has been added. The level of coolant and/or added fluid is controled in relation to the film thickness and/or film temperature and/or film take-off(4) speed and/or extruder(3) output. Coolant temperature and/or atomized fluid temperature are controled according to film thickness and/or film temperature and/or film take-off(4) speed and/or extruder(3) output. Parameters for process control are measured(7) at points around the circumference of the tubular film(1) and coolant is supplied to different segments accordingly. Fluid can be added to the coolant before or after contact between coolant and film. Coolant is extracted(15) at the end of a selected contact zone between coolant and film. Atomized fluid can be either water or a fluid which evaporates at room temperature and pressure.</p> |
