Patent application number | Description | Published |
20090181295 | METHOD FOR PRODUCING POROUS LAMINATE AND POROUS LAMINATE - A process for producing a porous laminate having many micropores interconnected in the thickness direction, which comprises: a step in which a laminate is produced which comprises at least three layers comprising an interlayer made of a thermoplastic resin having a hard segment and a soft segment and two nonporous outer layers made of a filler-containing resin and located as outer layers respectively on both sides of the interlayer; a step in which the laminate obtained is impregnated with a supercritical or subcritical fluid and this state is relieved to vaporize the fluid and thereby make the interlayer porous; and a step in which the two nonporous outer layers located respectively on both sides are made porous by stretching. | 07-16-2009 |
20110165473 | NONAQUEOUS ELECTROLYTE SOLUTION SECONDARY BATTERY SEPARATOR AND NONAQUEOUS ELECTROLYTE SOLUTION SECONDARY BATTERY USING THE SAME - An object of this invention is to improve battery performance such as a rate capability of a nonaqueous electrolyte solution secondary battery using a separator constituting a thermoplastic resin-based porous film containing a filler. | 07-07-2011 |
20110212358 | LAMINATED POROUS FILM AND SEPARATOR FOR BATTERY - A laminated porous film having at least two porous layers layered one upon another. One porous layer consists of a resin layer containing a polypropylene resin. The other layer is a heat-resistant layer consisting of a resin composition whose crystal fusion peak temperature is higher than that of the resin composition of the layer containing the polypropylene resin. The laminated porous film has a β activity and/or a β crystal generation power. | 09-01-2011 |
20110217584 | LAMINATED POROUS FILM, SEPARATOR FOR LITHIUM CELL, AND CELL - Provided is a laminated porous film having excellent shutdown characteristics and breakdown characteristics, good tearing strength and dimensional stability, and B activity. The laminated porous film comprises layer A, the main component of which is a polypropylene resin, and layer B which contains a polyethylene resin, and the ratio of the rearing strength (H | 09-08-2011 |
20110300430 | SEPARATOR FOR BATTERY, AND NON-AQUEOUS LITHIUM BATTERY - Disclosed is a separator for a battery, which comprises a porous film mainly composed of a polyolefin film, has heat resistance, and can improve battery properties. Specifically disclosed is a separator for a battery, which is characterized by having a layer mainly composed of a polyolefin resin, wherein at least one surface of the separator has an arithmetic average roughness (Ra) of 0.3 μm or more. | 12-08-2011 |
20110305940 | METHOD FOR PRODUCING POROUS LAMINATE AND POROUS LAMINATE - A process for producing a porous laminate having many micropores interconnected in the thickness direction, which comprises: a step in which a laminate is produced which comprises at least three layers comprising an interlayer made of a thermoplastic resin having a hard segment and a soft segment and two nonporous outer layers made of a filler-containing resin and located as outer layers respectively on both sides of the interlayer; a step in which the laminate obtained is impregnated with a supercritical or subcritical fluid and this state is relieved to vaporize the fluid and thereby make the interlayer porous; and a step in which the two nonporous outer layers located respectively on both sides are made porous by stretching. | 12-15-2011 |
20120101180 | POROUS POLYPROPYLENE FILM - Provided is a porous polypropylene film having both air permeability properties and puncture strength. A porous polypropylene film which has an air permeability of 700 seconds/100 ml or less and a puncture strength of 1.5 N or greater, and has β activity can be obtained when the porous polypropylene film is made to have a tensile strength in the machine direction of the film, E | 04-26-2012 |
20120329894 | POLYPROPYLENE SERIES RESIN POROUS FILM, BATTERY SEPARATOR AND BATTERY - Regarding a polypropylene series resin porous film having a polypropylene series resin as the main component, so as to exert excellent slipping ability and processability when used as a battery separator, a polypropylene series resin porous film fabricated in such a way that the coefficient of static friction against film is greater than the coefficient of static friction against SUS is proposed. | 12-27-2012 |
20130011743 | POROUS POLYPROPYLENE FILM - In order to provide a porous polypropylene film in which the ratio of change in air permeability is small and the initial air-permeating property is satisfactory even under high temperature environment, a porous polypropylene film is proposed, satisfying the following conditions (1) and (2) regarding air-permeability (Pa | 01-10-2013 |
20130017430 | POLYOLEFIN RESIN POROUS FILM AND BATTERY SEPARATORAANM Terakawa; ToruAACI ShigaAACO JPAAGP Terakawa; Toru Shiga JPAANM Yamada; TakeyoshiAACI ShigaAACO JPAAGP Yamada; Takeyoshi Shiga JPAANM Usami; YasushiAACI ShigaAACO JPAAGP Usami; Yasushi Shiga JP - As an object of the present invention, to provide a polyolefin resin porous film fulfilling high continuity, excellent dimensional stability and shutdown function which closes the pores sensitively and completely in a temperature range of 120 to 140° C. without closing the pores at less than 120° C. The present invention relates to a polyolefin resin porous film having at least one layer each of a layer comprising as the main component a polypropylene resin composition (A) and a layer comprising as the main component a polyethylene resin composition (B) fulfilling the condition (i) the melting point of the polyethylene resin composition (B) is 130° C. or higher, and the condition (ii) the melt flow rate (MFR) of the polyethylene resin composition (B) is 2.0 to 15 g/10 minutes. | 01-17-2013 |
20130017452 | POLYPROPYLENE SERIES RESIN POROUS FILM, BATTERY SEPARATOR AND BATTERYAANM Yamamoto; MihoAACI ShigaAACO JPAAGP Yamamoto; Miho Shiga JPAANM Yamada; TakeyoshiAACI ShigaAACO JPAAGP Yamada; Takeyoshi Shiga JPAANM Usami; YasushiAACI ShigaAACO JPAAGP Usami; Yasushi Shiga JP - As a porous film in which the air-permeability at the time of elongation of the porous film was adjusted, whereby, when used as a battery separator, the holes of a separator in an electrode/separator wound body have been controlled, a polypropylene series resin porous film is proposed, in which, for a porous film having a polypropylene series resin as the main component, regarding air-permeability (Pa) prior to elongation and air-permeability (Pa′) at 5% elongation, (1) Pa′ is 1,000 seconds/100 ml or less and (2) Pa′/Pa is 1.5 or less. | 01-17-2013 |
20140087167 | POROUS POLYPROPYLENE FILM - Provided is a porous polypropylene film having both air permeability properties and puncture strength. A porous polypropylene film which has an air permeability of 700 seconds/100 ml or less and a puncture strength of 1.5 N or greater, and has β activity can be obtained when the porous polypropylene film is made to have a tensile strength in the machine direction of the film, E | 03-27-2014 |