TW338052B - The method for producing polypropylene foam with high expansion ratio - Google Patents

The method for producing polypropylene foam with high expansion ratio

Info

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
Application number
TW085113474A
Other languages
Chinese (zh)
Inventor
Ming-Tzay Liang
Original Assignee
Ming-Tzay Liang
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 Ming-Tzay Liang filed Critical Ming-Tzay Liang
Priority to TW085113474A priority Critical patent/TW338052B/en
Application granted granted Critical
Publication of TW338052B publication Critical patent/TW338052B/en

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.
TW085113474A 1996-11-02 1996-11-02 The method for producing polypropylene foam with high expansion ratio TW338052B (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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