Film production method
AssigneeSumitomo Chemical Company, Limited
InventorsAkihiko Shin, Yuji Takaoka, Atsushi Nakazawa, Hideyuki Sasaki
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Abstract
A desired drying capability is achieved while damage to a film is prevented. A film production method is arranged such that: a production process including a drying step is operated by setting a drying condition, under which to carry out the drying step, for each of at least two periods, the two periods being a first period and a second period later than the first period; the drying condition is changed in at least a part of the first period so as to be enhanced with time; and the drying condition is maintained in the second period so as to be substantially fixed.
Claims8
A film production method comprising a film drying step, wherein:
- the drying step comprises setting a drying temperature of a heating medium at which to carry out the drying step, for each of at least two periods, a first period and a second period later than the first period;
- a set value of the drying temperature is changed in at least a part of the first period so as to be increased with time;
- and
- the set value is maintained in the second period so as to be substantially fixed;
- and
- an actual drying temperature of the film is consequently constant throughout the first period and the second period.
Dependencies are inferred from the claim text.