JPS5589330A - Production of polyester - Google Patents
Production of polyesterInfo
- Publication number
- JPS5589330A JPS5589330A JP16327778A JP16327778A JPS5589330A JP S5589330 A JPS5589330 A JP S5589330A JP 16327778 A JP16327778 A JP 16327778A JP 16327778 A JP16327778 A JP 16327778A JP S5589330 A JPS5589330 A JP S5589330A
- Authority
- JP
- Japan
- Prior art keywords
- polyester
- heat
- aldehydes
- oligomers
- reduce
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Polyesters Or Polycarbonates (AREA)
Abstract
PURPOSE: Polyester is heat-treated under specific conditions with the flow of inert gas to reduce the contents of aldehydes and oligomers.
CONSTITUTION: A polyester of more than 0.5 intrinsic viscosity, preferably, polyethylene terephthalate with a bulk density of 0.6W0.9g/ml, is heat-treated under the flow of inert gas, preferably nitrogen gas, at a ratio of 1W500, preferably 1W 300l/hr.kg of the polyester in the temperature range from 180°C to lower than the melting point, preferably from 190°C to 240°C to reduce the content of aldehydes to less than 10ppm and/or oligomers to less than 0.5wt%. When the polyester is heat treated, the change in intrinsic viscosity of the polyester is required to satisfy the equation ([η]0 and [η] are the intrinsic viscosities before and after the heat treatment respectively).
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16327778A JPS5589330A (en) | 1978-12-27 | 1978-12-27 | Production of polyester |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16327778A JPS5589330A (en) | 1978-12-27 | 1978-12-27 | Production of polyester |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5589330A true JPS5589330A (en) | 1980-07-05 |
JPS6249294B2 JPS6249294B2 (en) | 1987-10-19 |
Family
ID=15770741
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16327778A Granted JPS5589330A (en) | 1978-12-27 | 1978-12-27 | Production of polyester |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5589330A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6703138B1 (en) | 1999-10-19 | 2004-03-09 | Toyo Boseki Kabushiki Kaisha | Laminated polyester film |
JP2004148539A (en) * | 2002-10-28 | 2004-05-27 | Toyobo Co Ltd | Electrically conductive polyester sheet and packaging container for electronic component comprising it |
JP2007177228A (en) * | 2005-12-02 | 2007-07-12 | Toray Ind Inc | Method for producing polyester composition |
JP2008511730A (en) * | 2004-09-02 | 2008-04-17 | イーストマン ケミカル カンパニー | Removal of residual acetaldehyde from polyester polymer particles |
EP2743287A1 (en) | 2004-05-31 | 2014-06-18 | Toray Industries, Inc. | Polyester resin composition, process for producing the same, and polyester film |
JP2015006794A (en) * | 2014-08-05 | 2015-01-15 | 東洋紡株式会社 | Base film for lens sheet |
JP2015044411A (en) * | 2014-10-07 | 2015-03-12 | 東洋紡株式会社 | Biaxially stretched polyethylene terephthalate film for releasing polarizing plate |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS495913A (en) * | 1972-05-16 | 1974-01-19 | ||
JPS5373288A (en) * | 1976-12-13 | 1978-06-29 | Teijin Ltd | Preparation of polyester pellets |
JPS5584331A (en) * | 1978-12-22 | 1980-06-25 | Mitsubishi Plastics Ind Ltd | Preparation of weather resistant improved vinyl chloride resin molded article |
JPS55115431A (en) * | 1979-02-26 | 1980-09-05 | Mitsubishi Plastics Ind Ltd | Preparation of polyvinyl chloride molded product with improved weather resistance |
-
1978
- 1978-12-27 JP JP16327778A patent/JPS5589330A/en active Granted
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS495913A (en) * | 1972-05-16 | 1974-01-19 | ||
JPS5373288A (en) * | 1976-12-13 | 1978-06-29 | Teijin Ltd | Preparation of polyester pellets |
JPS5584331A (en) * | 1978-12-22 | 1980-06-25 | Mitsubishi Plastics Ind Ltd | Preparation of weather resistant improved vinyl chloride resin molded article |
JPS55115431A (en) * | 1979-02-26 | 1980-09-05 | Mitsubishi Plastics Ind Ltd | Preparation of polyvinyl chloride molded product with improved weather resistance |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6703138B1 (en) | 1999-10-19 | 2004-03-09 | Toyo Boseki Kabushiki Kaisha | Laminated polyester film |
JP2004148539A (en) * | 2002-10-28 | 2004-05-27 | Toyobo Co Ltd | Electrically conductive polyester sheet and packaging container for electronic component comprising it |
JP4573087B2 (en) * | 2002-10-28 | 2010-11-04 | 東洋紡績株式会社 | Conductive polyester sheet and electronic component packaging container comprising the same |
EP2743287A1 (en) | 2004-05-31 | 2014-06-18 | Toray Industries, Inc. | Polyester resin composition, process for producing the same, and polyester film |
JP2008511730A (en) * | 2004-09-02 | 2008-04-17 | イーストマン ケミカル カンパニー | Removal of residual acetaldehyde from polyester polymer particles |
JP2007177228A (en) * | 2005-12-02 | 2007-07-12 | Toray Ind Inc | Method for producing polyester composition |
JP2015006794A (en) * | 2014-08-05 | 2015-01-15 | 東洋紡株式会社 | Base film for lens sheet |
JP2015044411A (en) * | 2014-10-07 | 2015-03-12 | 東洋紡株式会社 | Biaxially stretched polyethylene terephthalate film for releasing polarizing plate |
Also Published As
Publication number | Publication date |
---|---|
JPS6249294B2 (en) | 1987-10-19 |
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