JPS5569618A - Polyester resin for packaging - Google Patents
Polyester resin for packagingInfo
- Publication number
- JPS5569618A JPS5569618A JP14304078A JP14304078A JPS5569618A JP S5569618 A JPS5569618 A JP S5569618A JP 14304078 A JP14304078 A JP 14304078A JP 14304078 A JP14304078 A JP 14304078A JP S5569618 A JPS5569618 A JP S5569618A
- Authority
- JP
- Japan
- Prior art keywords
- fluid
- polyester resin
- reduced pressure
- room temperature
- gas
- 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.)
- Pending
Links
Landscapes
- Wrappers (AREA)
- Polyesters Or Polycarbonates (AREA)
Abstract
PURPOSE: To reduce the acetaldehyde content of a polyester resin and to improve its safety as a food-packaging material, by passing a specifically formed polyethylene terephthalate through a fluid or reduced pressure atmosphere.
CONSTITUTION: A polyester prepared by melt polymerization, consisting mainly of ethylene terephthalate unit, and having an intrinsic viscosity of ≥0.50, is melt- formed into fibers or films having a specific surface area of ≥50cm2/g (pref. ≥100cm2/g). The formed articles are passed through a fluid (e.g. air, nitrogen, steam, etc. as a gas and water as a liquid) or reduced pressure atmosphere to give an acetaldehyde content of ≤20ppm. The contact of the polymer with a fluid is preferably carried out at room temperature to 150°C for 1W15min. for a gas, or at room temperature to 100°C for 5W20min. for water.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14304078A JPS5569618A (en) | 1978-11-20 | 1978-11-20 | Polyester resin for packaging |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14304078A JPS5569618A (en) | 1978-11-20 | 1978-11-20 | Polyester resin for packaging |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5569618A true JPS5569618A (en) | 1980-05-26 |
Family
ID=15329500
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14304078A Pending JPS5569618A (en) | 1978-11-20 | 1978-11-20 | Polyester resin for packaging |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5569618A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5648032A (en) * | 1995-08-01 | 1997-07-15 | Eastman Chemical Company | Process for producing polyester articles having low acetaldehyde content |
JP2007503341A (en) * | 2003-05-21 | 2007-02-22 | レール・リキード−ソシエテ・アノニム・ア・ディレクトワール・エ・コンセイユ・ドゥ・スールベイランス・プール・レテュード・エ・レクスプロワタシオン・デ・プロセデ・ジョルジュ・クロード | Method and apparatus for the production of polyethylene terephthalate preforms |
US7863405B2 (en) | 2004-09-02 | 2011-01-04 | Eastman Chemical Company | Removal of residual acetaldehyde from polyester polymer particles |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5080390A (en) * | 1973-11-16 | 1975-06-30 | ||
JPS5373288A (en) * | 1976-12-13 | 1978-06-29 | Teijin Ltd | Preparation of polyester pellets |
-
1978
- 1978-11-20 JP JP14304078A patent/JPS5569618A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5080390A (en) * | 1973-11-16 | 1975-06-30 | ||
JPS5373288A (en) * | 1976-12-13 | 1978-06-29 | Teijin Ltd | Preparation of polyester pellets |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5648032A (en) * | 1995-08-01 | 1997-07-15 | Eastman Chemical Company | Process for producing polyester articles having low acetaldehyde content |
JP2007503341A (en) * | 2003-05-21 | 2007-02-22 | レール・リキード−ソシエテ・アノニム・ア・ディレクトワール・エ・コンセイユ・ドゥ・スールベイランス・プール・レテュード・エ・レクスプロワタシオン・デ・プロセデ・ジョルジュ・クロード | Method and apparatus for the production of polyethylene terephthalate preforms |
US7863405B2 (en) | 2004-09-02 | 2011-01-04 | Eastman Chemical Company | Removal of residual acetaldehyde from polyester polymer particles |
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