Solution film forming method and apparatus
The present invention provides a solution film-forming method and apparatus which, when forming a film having the thickness of 50 [mu]m or less by performing elongation in the transverse direction on the film, do not generate repetitive depressed portions. The solution film-forming device (10) compr...
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| creator | OHNO, SEIICHI SAKASHITA, HIROYUKI KOUNO, SACHIKO FUJITA, JUMPEI |
| description | The present invention provides a solution film-forming method and apparatus which, when forming a film having the thickness of 50 [mu]m or less by performing elongation in the transverse direction on the film, do not generate repetitive depressed portions. The solution film-forming device (10) comprises a flexible die (24), a pair of rollers (22, 23), a belt (21) and a tenter (16). The belt (21) is made of metal and formed in the shape of a ring by means of welding. The temperature of a casting surface of the belt (21) on which a dope (11) is cast is controlled by the rollers (22, 23). The other side of the belt (21) has a welding unit having the height in the range of 3 [mu]m or more and 30 [mu]m or less. A film (12) is tapped by a clip (31) of the tenter (16) and returned, and elongated in the transverse direction. Also, the film (12) is dried at the tenter (16). |
| format | Patent |
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The solution film-forming device (10) comprises a flexible die (24), a pair of rollers (22, 23), a belt (21) and a tenter (16). The belt (21) is made of metal and formed in the shape of a ring by means of welding. The temperature of a casting surface of the belt (21) on which a dope (11) is cast is controlled by the rollers (22, 23). The other side of the belt (21) has a welding unit having the height in the range of 3 [mu]m or more and 30 [mu]m or less. A film (12) is tapped by a clip (31) of the tenter (16) and returned, and elongated in the transverse direction. 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| subjects | AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP |
| title | Solution film forming method and apparatus |
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