Abstract: A process for classifying plastic-containing wastes which comprises dissolving a mixture of plastics containing polyolefin-type plastics in a hydrocarbon solvent (preferably of a xylene type) at a temperature of not lower than 60.degree. C. (preferably not lower than 80.degree. C.), vacuum-evaporating the solvent of the solution to cause precipitation of the polyolefin-type plastics dissolved therein, separating and recovering the major portion of the precipitate, further dividing the resulting separated solution into the concentrated liquor of the precipitate yet remaining admixed in the separated solution and the phase of a solution hardly containing the precipitate, recycling the concentrated liquor and using again for dissolving the mixture of plastics, and removing the solvent from the phase of a solution hardly containing the precipitate so as to recover the polystyrene-type plastics.

Abstract: This invention generally relates to a lead-acid storage battery comprising positive plates having the characteristic of both paste type and clad type plates and pasted negative plates which are alternately arranged and separators each disposed between the adjacent positive and negative plates. The positive plates each comprise a grid or substrate having spaced longitudinal members of electrically conducting material and spaced latitudinal members formed integrally with the longitudinal members, the latitudinal members having the thickness smaller than that of the longitudinal members. The latitudinal members may be omitted if the substrate can be filled with active material without any latitudinal members. Each of the positive plates comprises pasted active material filled in the grid; and active material holder composed of porous insulating sheets mounted on active material.