Title:
WASHING METHOD OF FILTER
Document Type and Number:
Japanese Patent JP2013193066
Kind Code:
A
Abstract:
To provide an industrially useful washing method for fusing and filtering liquid crystalline polyester and then reusing a filter.
This method is for fusing and filtering liquid crystalline polyester using a filter whose filtration accuracy is 1 to 50 μm and then washing the filter. In the washing method of the filter, the filter is heated to a temperature satisfying the following requirement (a) or higher, and then alkali washing is performed. (a) At the temperature, melt viscosity of the liquid crystalline polyester becomes 500 Pa s or lower, measured by a flow property tester using a die having a nozzle diameter of 0.5 mmφ and a nozzle length of 10 mm under the condition that a shear rate is 1,000(s-1).
Inventors:
HOSODA TOMOYA
MAEDA MITSUO
HARA SADAYUKI
MAEDA MITSUO
HARA SADAYUKI
Application Number:
JP2012066123A
Publication Date:
September 30, 2013
Filing Date:
March 22, 2012
Export Citation:
Assignee:
SUMITOMO CHEMICAL CO
International Classes:
B01D41/04; B01D24/00; B01D29/00; B01D29/07; B01D29/39; B01D29/62; B01D39/20; B01D65/02; B01D65/06; B01D71/02; C11D7/06
Domestic Patent References:
| JP2002265577A | 2002-09-18 | |||
| JP2010274622A | 2010-12-09 | |||
| JPS5462181A | 1979-05-18 | |||
| JPS56124416A | 1981-09-30 | |||
| JP2006305553A | 2006-11-09 | |||
| JPH11104421A | 1999-04-20 | |||
| JP2007090231A | 2007-04-12 |
Attorney, Agent or Firm:
Sumio Tanai
Naozumi Hiroyasu
Norihiko Ara
Hiroyuki Kato
Mitsunaga Igarashi
Naozumi Hiroyasu
Norihiko Ara
Hiroyuki Kato
Mitsunaga Igarashi