Abstract: A polypropylene based sealant film for retort packaging includes a film made of a resin composition that contains 70 to 85 wt % of a propylene/ethylene block copolymer (a) and 15 to 30 wt % of a low-density polyethylene based polymer (b), wherein, as for the propylene/ethylene block copolymer (a), a proportion of a 20° C. xylene insoluble portion is 75 to 85 wt % relative to 100 wt % of (a), a limiting viscosity ([?]H) of the insoluble portion is 1.7 to 2.0 dl/g, and a limiting viscosity ([?]EP) of a soluble portion is 3.0 to 3.4 dl/g, and the low-density polyethylene based polymer (b) has a density of 0.900 to 0.930 g/cm3 and a melt flow rate of 1 to 10 g/10 minutes.

Abstract: A heat-sealable insulating film for installation in a secondary battery including a positive electrode member and a negative electrode member being formed from a collector foil and an active material layer formed to cover one end on the collector foil, wherein an adhesive layer is adhered by heat-sealing to cover at least a boundary of an exposed part of the collector foil and the active material layer of the positive electrode member or the negative electrode member, a peripheral edge of the positive electrode member or the negative electrode member has a cross-sectional surface including the collector foil and the insulating film, and the insulating film consists of at least two layers of a base material layer made of a polyolefin resin and the adhesive layer made of a polyolefin resin modified with an unsaturated carboxylic acid or a derivative thereof.

Abstract: A heat-sealable insulating film for installation in a secondary battery including a positive electrode member and a negative electrode member being formed from a collector foil and an active material layer formed to cover one end on the collector foil, wherein an adhesive layer is adhered by heat-sealing to cover at least a boundary of an exposed part of the collector foil and the active material layer of the positive electrode member or the negative electrode member, a peripheral edge of the positive electrode member or the negative electrode member has a cross-sectional surface including the collector foil and the insulating film, and the insulating film consists of at least two layers of a base material layer made of a polyolefin resin and the adhesive layer made of a polyolefin resin modified with an unsaturated carboxylic acid or a derivative thereof

Abstract: A secondary battery includes an outer housing and an electrode body including a positive electrode member, separator member and a negative electrode member stacked in this order wherein the positive electrode member and the negative electrode member are formed from a collector and an active material layer formed to cover one end on the collector, an insulating body in which an insulating material that does not exhibit adhesiveness at room temperature is adhered with an adhesive strength of 1 N/15 mm or greater onto the collector constituting the positive electrode member or the negative electrode member, and a peripheral edge of the positive electrode member or the negative electrode member has a cross-sectional surface including the collector and the insulating body.

Abstract: A secondary battery includes an outer housing and an electrode body including a positive electrode member, separator member and a negative electrode member stacked in this order wherein the positive electrode member and the negative electrode member are formed from a collector and an active material layer formed to cover one end on the collector, an insulating body in which an insulating material that does not exhibit adhesiveness at room temperature is adhered with an adhesive strength of 1 N/15 mm or greater onto the collector constituting the positive electrode member or the negative electrode member, and a peripheral edge of the positive electrode member or the negative electrode member has a cross-sectional surface including the collector and the insulating body.