Abstract: A partially crosslinked adhesive-supported porous film for battery separator, which in producing a battery, can effectively produce a battery as an electrode/separator laminate in which an electrode and a separator are temporarily bonded to each other without causing mutual slip movement between the electrode and the separator and which after producing a battery, functions itself as a separator having a small heat shrinkage factor even at high temperatures, and a process of producing a battery using such a partially crosslinked adhesive-supported porous film.

Abstract: A partially crosslinked adhesive-supported porous film for battery separator, which in producing a battery, can effectively produce a battery as an electrode/separator laminate in which an electrode and a separator are temporarily bonded to each other without causing mutual slip movement between the electrode and the separator and which after producing a battery, functions itself as a separator having a small heat shrinkage factor even at high temperatures, and a process of producing a battery using such a partially crosslinked adhesive-supported porous film.

Abstract: The invention provides an adhesive-carrying porous film for use as a battery separator, comprising: a substrate porous film, wherein when a 1 mm diameter penetrating thermomechanical analyzer probe is placed on the film under a 70 g load to measure a thickness while heating the film from room temperature at a rate of 200° C./minute to a temperature where the film thickness decreases by half when the probe was initially placed is 200° C. or more, a partially crosslinked adhesive carried on the film, the adhesive is prepared by reacting a reactive polymer having a functional group capable of reacting with an isocyanate group with a polyfunctional isocyanate so the reactive polymer is partially crosslinked, a porous film is temporarily bonded to an electrode to provide an electrode/separator laminate, the porous film in a battery functions as a separator which does not melt or break with small heat shrinkage under high temperatures.

Abstract: An adhesive composition-supporting separator for a battery includes a porous substrate supporting thereon a thermally cross-linkable adhesive composition comprising a multi-functional isocyanate and a reactive polymer having a functional group capable of reacting with an isocyanato group of the multi-functional isocyanate; an electrode/separator laminate is obtained by contact pressing the adhesive composition-supporting separator for a battery against electrodes; and an electrode/separator bonded material having a cross-linked adhesive composition is obtained by heating the electrode/separator laminate to thereby react the multifunctional isocyanate with the reactive polymer for causing cross-linking.

Abstract: The invention provides an adhesive-carrying porous film for use as a battery separator, which comprises: a substrate porous film such that when a probe of a probe penetrating thermomechanical analyzer, said probe having a diameter of 1 mm, is placed on the porous film under a load of 70 g to measure a thickness thereof while heating the porous film from room temperature at a rate of 2° C./minute, a temperature at which the thickness of the porous film decreases to a half of the thickness of the porous film when the probe was initially placed thereon is 200° C. or more; and a partially crosslinked adhesive carried on the substrate porous film, the partially crosslinked adhesive being prepared by reacting a reactive polymer having a functional group capable of reacting with an isocyanate group therein with a polyfunctional isocyanate so that the reactive polymer is partially crosslinked. Such a porous film (a separator) is temporarily bonded to an electrode to provide an electrode/separator laminate.

Abstract: A partially crosslinked adhesive-supported porous film for battery separator, which in producing a battery, can effectively produce a battery as an electrode/separator laminate in which an electrode and a separator are temporarily bonded to each other without causing mutual slip movement between the electrode and the separator and which after producing a battery, functions itself as a separator having a small heat shrinkage factor even at high temperatures, and a process of producing a battery using such a partially crosslinked adhesive-supported porous film.

Abstract: An adhesive composition-supporting separator for a battery includes a porous substrate supporting thereon a thermally cross-linkable adhesive composition comprising a multi-functional isocyanate and a reactive polymer having a functional group capable of reacting with an isocyanato group of the multi-functional isocyanate; an electrode/separator laminate is obtained by contact pressing the adhesive composition-supporting separator for a battery against electrodes; and an electrode/separator bonded material having a cross-linked adhesive composition is obtained by heating the electrode/separator laminate to thereby react the multifunctional isocyanate with the reactive polymer for causing cross-linking.

Abstract: A microporous film which is excellent in permeability and mechanical strength and has breakage resistance at high temperatures; a separator for a nonaqueous-electrolyte battery which comprises the microporous film; and a nonaqueous-electrolyte battery employing the separator. The microporous film has a gel content of from 20 to 90% as determined through 3-hour immersion in boiling xylene.

Abstract: A porous film having high strength, homogeneous porous structure, and excellent affinity for electrolytic solutions and suitable for use as a separator for batteries and capacitors; a process for producing the film; and a battery and capacitor each employing the porous film as a separator. The porous film comprises a resin composition including from 70 to 99.9% by weight of an high molecular weight polyolefin resin and from 0.1 to 30% by weight of a polymer having a polyacrylate, polymethacrylate, poly (ethylene oxide), poly (propylene oxide), poly(ethylene propylene oxide), polyphosphazene, poly(vinyl ether) or polysiloxane structure as or in a main chain and having a chain oligo (alkylene oxide) structure in side chains.

Abstract: A microporous film which is excellent in permeability and mechanical strength and has breakage resistance at high temperatures; a separator for a nonaqueous-electrolyte battery which comprises the microporous film; and a nonaqueous-electrolyte battery employing the separator. The microporous film has a gel content of from 20 to 90% as determined through 3-hour immersion in boiling xylene.