发明名称 |
POLYESTER RESIN COMPOSITION, AND BLOW-MOLDED ARTICLE OBTAINED THEREFROM |
摘要 |
PROBLEM TO BE SOLVED: To provide a polyester resin composition from which a blow-molded article excellent in thermal stability and transparency can be obtained with high productivity without causing a drawdown problem or a whitening problem due to crystallization and which has such excellent recyclability that even an odd material generated at a molding step can be blow-molded again in a good state.SOLUTION: The polyester resin composition contains a polyester resin as a principal component, which resin contains: ethylene terephthalate as a main repeating unit; and 2-20 mol% of 1,4-cyclohexanedimethanol as a copolymerization component. The polyester resin composition has: 0.7-1.4 intrinsic viscosity; 4-10 of a ratio (&eegr;e/&eegr;) of the elongational viscosity (&eegr;e) to the shear viscosity (&eegr;) at 500 sshear rate in an elongational viscosity-shear rate curve obtained when the elongational viscosity is measured at 300°C; and 20 equivalent/ton or lower carboxyl end group concentration. |
申请公布号 |
JP2015166454(A) |
申请公布日期 |
2015.09.24 |
申请号 |
JP20150026559 |
申请日期 |
2015.02.13 |
申请人 |
UNITIKA LTD;NIPPON ESTER CO LTD |
发明人 |
KITAGAWA CHIAKI;TANAKA TOMOKI;HIDAKA YASUKI |
分类号 |
C08L67/02;B29C49/04;C08G63/183;C08G63/199;C08J5/00 |
主分类号 |
C08L67/02 |
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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