Title:
SEPARATOR FOR BATTERY
Document Type and Number:
Japanese Patent JP3782148
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a separator with a thin thickness, an excellent hot alkaline resisting property, and a high liquid retentivity, by a wet type sheet manufacturing of a polyolefin synthetic pulp, and a short fiber of a polyolefin based resin including a surfactant.
SOLUTION: By mixing about 30 to 95wt.% if polyolefin synthetic pulp, and about 7 to 70wt.% of short fiber consisting of a polyolefin based resin including a surfactant, they are mixed by a wet type sheet manufacturing method to make into a sheet, so as to form a separator for battery. The mean fiber length of the polyolefin based synthetic pulp is preferable to make at about 0.5-to 3mm, while its freeness is preferable to be less then 6sec/g. The interface activator is preferable to be scatted about 0.1 to 10% in the resin. It is preferable that the pulp and the short fiber are combined each other by a thermal fusion, in the separator. Since this separator has a good texture, and an even distribution of pore sizes, the gas permeability is good, and the capacity of the battery can be increased.
Inventors:
Minoru Tsuchida
Daitaka Yamaguchi
Toshiaki Suzuki
Daitaka Yamaguchi
Toshiaki Suzuki
Application Number:
JP3425496A
Publication Date:
June 07, 2006
Filing Date:
January 30, 1996
Export Citation:
Assignee:
Tomagawa Paper Mill Co., Ltd.
International Classes:
H01M2/16; D21H13/14; D21H15/02; (IPC1-7): H01M2/16; D21H13/14
Domestic Patent References:
| JP53098401A | ||||
| JP3019951A | ||||
| JP60194113A | ||||
| JP64072459A | ||||
| JP2221448A | ||||
| JP61224262A |
Attorney, Agent or Firm:
Mamoru Takeuchi