发明名称 |
METHOD FOR PRODUCING CELLULOSE ACYLATE FILM |
摘要 |
A casting film (24) is formed by casting a cellulose acylate solution (16) onto a cold drum (22) continuously running. The cellulose acylate solution (16) contains at most 0.01% of a compound which is extracted to a liquid incompatible with the water in a mixture of the water and the liquid. That is, at most 50mg of the compound is contained in 100 g of cellulose acylate. In the cellulose acylate solution (16), a concentration C1 of Ca is at most 100ppm, a proportion of the C1 to a concentration C2 of sulfuric acid satisfies the following formula: 0.5 =C1/C2= 1.5, and a concentration of Mg is in the range of 5 ppm to 50 ppm. Thereby, contamination of the surface of the cold drum (22) is prevented. |
申请公布号 |
WO2006068158(A1) |
申请公布日期 |
2006.06.29 |
申请号 |
WO2005JP23423 |
申请日期 |
2005.12.14 |
申请人 |
FUJI PHOTO FILM CO., LTD.;SUGIURA, MASARU;KAWAMOTO, FUMIO |
发明人 |
SUGIURA, MASARU;KAWAMOTO, FUMIO |
分类号 |
B29C41/24;C08J5/18;G02B5/30 |
主分类号 |
B29C41/24 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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