JPS5515885A - Fusion molding method for vinyl alcohol copolymer - Google Patents
Fusion molding method for vinyl alcohol copolymerInfo
- Publication number
- JPS5515885A JPS5515885A JP8980578A JP8980578A JPS5515885A JP S5515885 A JPS5515885 A JP S5515885A JP 8980578 A JP8980578 A JP 8980578A JP 8980578 A JP8980578 A JP 8980578A JP S5515885 A JPS5515885 A JP S5515885A
- Authority
- JP
- Japan
- Prior art keywords
- alcohol copolymer
- vinyl alcohol
- screw
- section
- mole
- 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
Abstract
PURPOSE: To obtain dimensionally stable products that have no air babbles nor fisheyes with high productivity (low required motor power per amount discharged) and with uniform discharge rate, by utilizing a specially constructed screw.
CONSTITUTION: A screw whose optimum compression ratio is 2.8 to 6.0 and clearance to a barrel is 0.2 to 2.0mm, is constructed in such a way that length of a compressing section is 14 to 25% of the sum of length of supplying section, compressing section, and weight measuring section. By utilizing this screw, a vinyl alcohol copolymer is extruded or injection molded. A saponified copolymer of ethylene and vinyl acetate consisting of 15 to 55 mole% of ethylene and 80 or more mole% of vinyl acetate saponification rate, is used for instance as a vinyl alcohol copolymer.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8980578A JPS5515885A (en) | 1978-07-22 | 1978-07-22 | Fusion molding method for vinyl alcohol copolymer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8980578A JPS5515885A (en) | 1978-07-22 | 1978-07-22 | Fusion molding method for vinyl alcohol copolymer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5515885A true JPS5515885A (en) | 1980-02-04 |
| JPS6111181B2 JPS6111181B2 (en) | 1986-04-01 |
Family
ID=13980924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8980578A Granted JPS5515885A (en) | 1978-07-22 | 1978-07-22 | Fusion molding method for vinyl alcohol copolymer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5515885A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0415357A2 (en) * | 1989-09-01 | 1991-03-06 | Air Products And Chemicals, Inc. | Extrudable polyvinyl alcohol compositions |
| US5051222A (en) * | 1989-09-01 | 1991-09-24 | Air Products And Chemicals, Inc. | Method for making extrudable polyvinyl alcohol compositions |
| US5137969A (en) * | 1989-09-01 | 1992-08-11 | Air Products And Chemicals, Inc. | Melt extrudable polyvinyl alcohol pellets having reduced maximum melt temperature and reduced gel content |
-
1978
- 1978-07-22 JP JP8980578A patent/JPS5515885A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0415357A2 (en) * | 1989-09-01 | 1991-03-06 | Air Products And Chemicals, Inc. | Extrudable polyvinyl alcohol compositions |
| US5051222A (en) * | 1989-09-01 | 1991-09-24 | Air Products And Chemicals, Inc. | Method for making extrudable polyvinyl alcohol compositions |
| US5137969A (en) * | 1989-09-01 | 1992-08-11 | Air Products And Chemicals, Inc. | Melt extrudable polyvinyl alcohol pellets having reduced maximum melt temperature and reduced gel content |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6111181B2 (en) | 1986-04-01 |
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