JPS525895A - Preparation of polyester - Google Patents

Preparation of polyester

Info

Publication number
JPS525895A
JPS525895A JP8215975A JP8215975A JPS525895A JP S525895 A JPS525895 A JP S525895A JP 8215975 A JP8215975 A JP 8215975A JP 8215975 A JP8215975 A JP 8215975A JP S525895 A JPS525895 A JP S525895A
Authority
JP
Japan
Prior art keywords
kettle
polyester
degree
preparation
extruded
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
Application number
JP8215975A
Other languages
Japanese (ja)
Inventor
Fumio Take
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyobo Co Ltd
Original Assignee
Toyobo Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toyobo Co Ltd filed Critical Toyobo Co Ltd
Priority to JP8215975A priority Critical patent/JPS525895A/en
Publication of JPS525895A publication Critical patent/JPS525895A/en
Pending legal-status Critical Current

Links

Landscapes

  • Polyesters Or Polycarbonates (AREA)

Abstract

PURPOSE: To prepare a polyester having a uniform polymerization degree by controlling the degree of vacuum in the final polycondensation kettle in accordance with the polymerization degrees of the polymer to be extruded from the kettle and that supplied to the kettle, and also controlling the degree of vacuum in the preceding kettle depending upon the DP of the polymer to be extruded from that kettle.
COPYRIGHT: (C)1977,JPO&Japio
JP8215975A 1975-07-02 1975-07-02 Preparation of polyester Pending JPS525895A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8215975A JPS525895A (en) 1975-07-02 1975-07-02 Preparation of polyester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8215975A JPS525895A (en) 1975-07-02 1975-07-02 Preparation of polyester

Publications (1)

Publication Number Publication Date
JPS525895A true JPS525895A (en) 1977-01-17

Family

ID=13766639

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8215975A Pending JPS525895A (en) 1975-07-02 1975-07-02 Preparation of polyester

Country Status (1)

Country Link
JP (1) JPS525895A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5339255A (en) * 1992-02-14 1994-08-16 Fuji Photo Film Co., Ltd. Method of controlling synthesis reaction

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5339255A (en) * 1992-02-14 1994-08-16 Fuji Photo Film Co., Ltd. Method of controlling synthesis reaction

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