| abstract |
A dope ( 15 ) is prepared with using TAC as a polymer. The dope ( 15 ) is transferred with heated by a transferring device ( 30 ). A heating medium ( 36 ) is used to heat the dope in the transferring device ( 30 ). A passage ( 35 ) for the heating medium ( 36 ) is formed between a cylinder ( 31 ) and a jacket ( 34 ). The jacket ( 34 ) is attached to flanges ( 32 ), ( 33 ) so as to form a full jacket. When the heating medium ( 36 ) is fed in the full jacket, a temperature of the flanges ( 32 ), ( 33 ) becomes equal to a temperature of the cylinder ( 31 ). Accordingly, temperature profile of the dope ( 15 ) becomes small, because there is no low temperature portion in the transferring device ( 30 ). Therefore, gelatinous material, which is caused by association generated on the low temperature portion, is not in the dope ( 15 ). |