JPS5791715A - Washing method for polyester filter - Google Patents
Washing method for polyester filterInfo
- Publication number
- JPS5791715A JPS5791715A JP55165299A JP16529980A JPS5791715A JP S5791715 A JPS5791715 A JP S5791715A JP 55165299 A JP55165299 A JP 55165299A JP 16529980 A JP16529980 A JP 16529980A JP S5791715 A JPS5791715 A JP S5791715A
- Authority
- JP
- Japan
- Prior art keywords
- filter
- polyester
- nitric acid
- glycol
- washing
- 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
- Filtration Of Liquid (AREA)
- Polyesters Or Polycarbonates (AREA)
Abstract
PURPOSE:To wash a polyester filter speedily and efficiently by using a mixed solution of glycol and nitric acid. CONSTITUTION:A filter used for removing foreign matter containied in a molten polyester in an arbitrary step of production of the molten polyester and/or a step of molding the polyester in its molten state is washed by using a mixed solution which contains nitric acid such as concentrated nitric acid or the like concentration of at least 1wt% based on a glycol such as triethylene glycol. Ideally, the washing should be conducted at 150-300 deg.C for a minimum of 1hr. When the filter is heavily contaminated, the washing may be repeated. Accordingly, the filter can be washed speadily and efficiently.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55165299A JPS5791715A (en) | 1980-11-26 | 1980-11-26 | Washing method for polyester filter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55165299A JPS5791715A (en) | 1980-11-26 | 1980-11-26 | Washing method for polyester filter |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5791715A true JPS5791715A (en) | 1982-06-08 |
JPS6359411B2 JPS6359411B2 (en) | 1988-11-18 |
Family
ID=15809687
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55165299A Granted JPS5791715A (en) | 1980-11-26 | 1980-11-26 | Washing method for polyester filter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5791715A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05137918A (en) * | 1991-11-20 | 1993-06-01 | Kanagawa Kiki Kogyo Kk | Cleaning liquid and cleaning method using the same |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02127804A (en) * | 1988-11-08 | 1990-05-16 | Nippon Telegr & Teleph Corp <Ntt> | Helical antenna |
-
1980
- 1980-11-26 JP JP55165299A patent/JPS5791715A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05137918A (en) * | 1991-11-20 | 1993-06-01 | Kanagawa Kiki Kogyo Kk | Cleaning liquid and cleaning method using the same |
Also Published As
Publication number | Publication date |
---|---|
JPS6359411B2 (en) | 1988-11-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20040406 |
|
A313 | Final decision of rejection without a dissenting response from the applicant |
Free format text: JAPANESE INTERMEDIATE CODE: A313 Effective date: 20040816 |
|
A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20040921 |