TW338052B - The method for producing polypropylene foam with high expansion ratio - Google Patents
The method for producing polypropylene foam with high expansion ratioInfo
- Publication number
- TW338052B TW338052B TW085113474A TW85113474A TW338052B TW 338052 B TW338052 B TW 338052B TW 085113474 A TW085113474 A TW 085113474A TW 85113474 A TW85113474 A TW 85113474A TW 338052 B TW338052 B TW 338052B
- Authority
- TW
- Taiwan
- Prior art keywords
- pressure
- polypropylene
- axe
- temperature
- high pressure
- Prior art date
Links
Abstract
A method for producing polypropylene foam with high expansion ratio, it is by reducing pressure to proceed foaming for melted polypropylene contained CO2. Its features are: Contact polypropylene resin with high pressure CO2 at temperature above melting point in high pressure axe, to clean single, low polymerization high molecular and impurities with low volatile contained in polypropylene. Directly change the pressure and temperature of high pressure axe, to adjust the solubility W of CO2 in melted polypropylene, that is above 33.3 cm3(STP)/g; And the temperature of CO2 inside the high pressure axe is above melting point (170 degree C) of polypropylene, and the pressure inside high pressure axe is desired to satisfy the enthalpy of CO2 at 38775- 40432 J/mol, to keep the temperature of CO2 after insulated & pressure-leaking between melting point and curing point. Adjust the valve-flow coefficient Cv of pressure-leaking valve to be large or equal to 1, to make sure the CO2 inside high-pressure axe can directly decrease pressure to atmospheric pressure in 1/1000 sec. Then it can produce polypropylene foam material with density ratio above 30, and cell density above 109 cm-3 and cellular at 10μm.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW085113474A TW338052B (en) | 1996-11-02 | 1996-11-02 | The method for producing polypropylene foam with high expansion ratio |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW085113474A TW338052B (en) | 1996-11-02 | 1996-11-02 | The method for producing polypropylene foam with high expansion ratio |
Publications (1)
Publication Number | Publication Date |
---|---|
TW338052B true TW338052B (en) | 1998-08-11 |
Family
ID=58263238
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW085113474A TW338052B (en) | 1996-11-02 | 1996-11-02 | The method for producing polypropylene foam with high expansion ratio |
Country Status (1)
Country | Link |
---|---|
TW (1) | TW338052B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI548683B (en) * | 2015-11-10 | 2016-09-11 | 國立臺灣科技大學 | Method for producing polymer nanofoam |
-
1996
- 1996-11-02 TW TW085113474A patent/TW338052B/en active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI548683B (en) * | 2015-11-10 | 2016-09-11 | 國立臺灣科技大學 | Method for producing polymer nanofoam |
US10106665B2 (en) | 2015-11-10 | 2018-10-23 | National Taiwan University Of Science And Technology | Method for producing polymer nanofoam |
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