Abstract: Provided is a resin composition superior in the adhesiveness to a metal and having high organic solvent resistance, particularly, a resin composition preferable as a sealant for an organic electrolyte battery, which shows superior adhesiveness to a terminal or a collector made of a highly heat resistant metal such as stainless steel and nickel, does not easily develop degradation even when contacted with an organic electrolytic solution at a high temperature, and does not easily influence an electrolytic solution, and a highly reliable organic electrolyte battery wherein leaching of an electrolytic solution from an electrolyte layer is prevented by the resin composition. A resin composition containing (A) an epoxy resin containing at least (E1) an epoxy resin having an aromatic ring and an alicyclic skeleton and (B) a latent curing agent.

Abstract: Provided is a resin composition superior in the adhesiveness to a metal and having high organic solvent resistance, particularly, a resin composition preferable as a sealant for an organic electrolyte battery, which shows superior adhesiveness to a terminal or a collector made of a highly heat resistant metal such as stainless steel and nickel, does not easily develop degradation even when contacted with an organic electrolytic solution at a high temperature, and does not easily influence an electrolytic solution, and a highly reliable organic electrolyte battery wherein leaching of an electrolytic solution from an electrolyte layer is prevented by the resin composition. A resin composition containing (A) an epoxy resin containing at least (E1) an epoxy resin having an aromatic ring and an alicyclic skeleton and (B) a latent curing agent.

Abstract: A manganese dry battery of the invention includes a positive electrode material mixture including manganese dioxide, a negative electrode zinc can with a lead content equal to or less than 0.03% by weight, and a separator comprising a paper with a paste material applied thereto. The separator contains 0.005 to 0.05 part by weight of bismuth in the form of BiCl3 per 100 parts by weight of a dry solid component in the paste material. It is thus possible to obtain a manganese dry battery that uses a negative electrode zinc can with a reduced lead content and exhibits excellent high-rate discharge performance and storage performance.

Abstract: The positive electrode current collector for a manganese dry battery of the present invention comprises a carbon rod, and either one of a paraffin wax containing hydrocarbon whose molecular weight is 300 to 500 and a microcrystalline wax containing hydrocarbon whose molecular weight is 500 to 800, which is impregnated into the carbon rod, is characterized in that the endothermic amount of the paraffin wax or the microcrystalline wax obtained by differential scanning calorimetry up to 45° C. is not more than 1.0 J/g. This enables the manganese dry battery employing the positive electrode current collector of the present invention to keep its sealing performance in a good condition during high-temperature storage even with the use of a low-density carbon rod.

Abstract: A manganese dry battery with excellent leak-proof property is provided, in which electrolyte leakage does not occur even if the size of a positive electrode material mixture is increased to meet a demand for improvement in discharge property. In a sealing part, a first circular projection, a second circular projection and a third circular projection are arranged at the bottom in sequence from the center to the outside, and a positive electrode carbon rod supporting part is provided in an innermost periphery portion to have an interval from the first circular projection. A groove between the first projection and the carbon rod is formed to have a substantially rectangular vertical section, kraft board is pressed by flat bottom surfaces of the first and second projections and an opening of the zinc can is fitted between the second and third projections.

Abstract: The positive electrode current collector for a manganese dry battery of the present invention comprises a carbon rod, and either one of a paraffin wax containing hydrocarbon whose molecular weight is 300 to 500 and a microcrystalline wax containing hydrocarbon whose molecular weight is 500 to 800, which is impregnated into the carbon rod, is characterized in that the endothermic amount of the paraffin wax or the microcrystalline wax obtained by differential scanning calorimetry up to 45° C. is not more than 1.0 J/g. This enables the manganese dry battery employing the positive electrode current collector of the present invention to keep its sealing performance in a good condition during high-temperature storage even with the use of a low-density carbon rod.

Abstract: A manganese dry battery with excellent leak-proof property is provided, in which electrolyte leakage does not occur even if the size of a positive electrode material mixture is increased to meet a demand for improvement in discharge property. In a sealing part, a first circular projection, a second circular projection and a third circular projection are arranged at the bottom in sequence from the center to the outside, and a positive electrode carbon rod supporting part is provided in an innermost periphery portion to have an interval from the first circular projection. A groove between the first projection and the carbon rod is formed to have a substantially rectangular vertical section, kraft board is pressed by flat bottom surfaces of the first and second projections and an opening of the zinc can is fitted between the second and third projections.

Abstract: A manganese dry battery which is stable and has an excellent gas tightness with any type of heat-shrinkable tube. The manganese dry battery comprises an anode zinc can, a cathode mixture contained in the can, a separator interposed between the can and the mixture, a carbon rod inserted in the center of the mixture, a gasket sealing the opening of the can and having a hole in the center thereof through which the carbon rod is inserted and a heat-shrinkable tube covering the circumference of the can with the outer periphery of the gasket. The heat-shrinkable tube comprises at least one selected from the group consisting of polystyrene, polypropylene, polyethylene and a copolymer of ethylene and propylene, and a sealant is applied at least between the opening end of the can and the gasket.

Abstract: The present invention provides a manganese dry battery having a high reliability for explosion prevention by employing a new gasket shape, which is easily manufactured and controlled in terms of its dimensions, as well as an explosion proof mechanism.

Abstract: There is described in the specification a mercury-free manganese primary dry battery wherein the cathode mixture contains boric acid or an alkali borate at a ratio of 0.04 to 0.4 parts by weight per 100 parts by weight of manganese dioxide as a boron conversion value or wherein the separator contains boric acid or an alkali borate at a ratio of 0.1 to 8.0 parts by weight per 100 parts by weight of a dry solid content in the pasting agent. Such battery has excellent discharge properties under light loading conditions.

Abstract: Notches (21a, 21b) are formed at the corners of only one side edge (19a) of a metal jacket blank (19) of a rectangular metal strip. The blank (19) is rolled into a cylindrical shape so that its opposite sides (19a, 19b) are adjoined to each other forming an abutment joint (10) and a lower end (19c) of the blank (19) is inwardly curled and crimped to form a bottom, thus completing an outer metal jacket (18). After a cell member (26) is loaded into the metal jacket (18), the upper end (19d) of the blank (19) is inwardly curled and crimped to cause the notches (21a, 21b) to abut the other side edge (19b) of the blank (19), forming a curled abutment joint (20) along a direction (S) which is different from the radial direction (R) of the metal jacket (18). This arrangement prevents any dents caused by the buckling of the outer metal jacket (18) while being crimped, and allows dry cells to be more efficiently produced.