发明名称 |
VERFAHREN ZUR HERSTELLUNG EINER POLYESTERBAHN UND EINES POLYESTERFILMS |
摘要 |
A process for producing a polyester sheet by dropping a molten polyester sheet extruded from an orifice-form nozzle on a cooling roll having the grooves of a large number of micro-cracks formed on the surface, closely adhering it to the cooling roll and solidifying it on the cooling roll, whereinthe surface temperature (T, ° C.) of the molten polyester sheet 10 mm below the orifice-form nozzle is maintained at a temperature which satisfies the following expression (1):wherein Tc and Tm are the falling temperature crystallization temperature (° C.) and melting point (° C.) of the polyester, respectively and T is as defined hereinabove, and the surface temperature of the cooling roll when it contacts the molten polyester sheet is controlled to a range of 5 to 100° C. to continuously form the polyester sheet while preventing the adhesion of a sublimate from the molten polyester to the inside of the groove of each micro-crack of the cooling roll. |
申请公布号 |
DE60134022(D1) |
申请公布日期 |
2008.06.26 |
申请号 |
DE2001634022 |
申请日期 |
2001.06.21 |
申请人 |
TEIJIN LTD. |
发明人 |
TAKAGI, NORIO;NITTA, SHOZO;GOTO, YO |
分类号 |
B29C47/88;B29K67/00;B29L7/00 |
主分类号 |
B29C47/88 |
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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