Manufacturing method of cellulose ester film
OwnerKatsusuke Nagashimainventor
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Abstract
Disclosed is a method of manufacturing a cellulose ester film according to a solution casting film manufacturing process comprising the steps of casting a cellulose ester dope on a support to form a film on the support, peeling the film from the support, drying the peeled film, and winding the dried film around a take-up spool, wherein the following relationship is satisfied: −4%≦MD−TD≦4% wherein MD is represented by the following formula: MD≡(transporting speed of film at the time when the film is wound around the take-up spool/transporting speed of film on the support−1)×100(%), and TD is represented by the following formula: TD≡(width of film at the time when the film is wound around the take-up spool/width of film immediately before peeled from the support−1)×100(%)
Claims15
A method of manufacturing a cellulose ester film according to a solution casting film manufacturing process comprising the steps of:
- casting a cellulose ester dope on a support to form a film on the support;
- peeling the film from the support;
- drying the peeled film;
- and
- winding the dried film around a take-up spool;
- wherein the following relationship is satisfied:
- −4%≦MD−TD≦4%
- wherein MD is represented by the following formula:
- MD≡(transporting speed of film at the time when the film iswound around the take-up spool/transporting speed of filmon the support−1)×100(%), and TD is represented by thefollowing formula:TD≡(width of film at the time when the film is wound aroundthe take-up spool/width of film immediately before peeledfrom the support−1)×100(%)
A method of manufacturing a cellulose ester film according to a solution casting film manufacturing process comprising the steps of:
- casting a cellulose ester dope on a support to form a film on the support;
- peeling the film from the support;
- drying the peeled film;
- and
- winding the dried film around a take-up spool;
- wherein the following relationship is satisfied:
- −6%≦MD+TD≦6%
- wherein MD is represented by the following formula:
- MD≡(transporting speed of film at the time when the film iswound around the take-up spool/transporting speed of filmon the support−1)×100(%), and TD is represented by thefollowing formula:TD≡(width of film at the time when the film is wound aroundthe take-up spool/width of film immediately before peeledfrom the support−1)×100(%)
A method of manufacturing a cellulose ester film according to a solution casting film manufacturing process comprising the steps of:
- casting a cellulose ester dope on a support to form a film on the support;
- peeling the film from the support;
- drying the peeled film;
- and
- winding the dried film around a take-up spool,
- wherein the following relationships are satisfied:
- −4%≦MD−TD≦4%, and −6%≦MD+TD≦6%
- wherein MD is represented by the following formula:
- MD≡(transporting speed of film at the time when the film iswound around the take-up spool/transporting speed of filmon the support−1)×100(%), and TD is represented by thefollowing formula:TD≡(width of film at the time when the film is wound aroundthe take-up spool/width of film immediately before peeledfrom the support−1)×100(%)
Dependencies are inferred from the claim text.