POLYOLEFIN SPLIT FIBER MADE TO BE ELECTRET PROPERTY

Title:

POLYOLEFIN SPLIT FIBER MADE TO BE ELECTRET PROPERTY

Document Type and Number:

Japanese Patent JP2953546

Kind Code:

B2

Abstract:

PURPOSE: To provide a polyolefin-based split fiber filter made to be an electret, containing a phase structure having small molecular mobility and exhibiting excellent charge-retainability at initial stage and over a long period.
CONSTITUTION: The objective polyolefin-based split fiber filter made to be an electret contains ≥20% (based on the total component phase) of a component phase having a spin-lattice relaxation time of a CH2 carbon nucleus (T1) of 1-10sec measured by a solid high-resolution pulse 13C-NMR. The presence of an intermediate phase having a small molecular mobility is effective in increasing the particle removing efficiency at the initial stage as well as for a long period after the formation of an electret and giving an electret filter having excellent charge retainability.

Inventors:

TANI YATSUHIRO
TOKUDA SEIJI

Application Number:

JP16908192A

Publication Date:

September 27, 1999

Filing Date:

June 26, 1992

Export Citation:

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Assignee:

TOYO BOSEKI KK

International Classes:

B01D39/00; B01D39/14; D01F6/04; D01F6/06; D06M10/00; H01G7/02; D06M101/00; D06M101/16; D06M101/18; D06M101/20; D06M101/22; (IPC1-7): D01F6/06; B01D39/00; B01D39/14; D06M10/00; H01G7/02

Domestic Patent References:

JP59168116A

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