| 摘要 |
PURPOSE:To improve the life of a lead-acid battery by folding and stacking unweldable porous body layers at the inside, pressing them from above, pinching at least part of projections, and connecting thermoplastic resin porous body layers together. CONSTITUTION:An unweldable porous body layer 1 with an angular irregular shape 3 on both side sections is stacked on a thermoplastic resin porous body layer 2 so that the upper and lower sections of the folding line CL in the perpendicular direction to both sides are made vertically symmetrical, and they are folded at the folding line CL so that the unweldable porous body layer 1 is located inside. They are inserted between a pair of engagedly rotated gears and pressed by the tip pressures of the teeth of gears corresponding to the pitch of the gears. Thermoplastic resin porous body layers 2, 12 are welded together at connection layers 3, 31 while projections provided on both side sections of the unweldable porous body layers 1, 11 are pinched, and a bag- shaped separator arranged with the unweldable porous body layers 1, 11 inside and the thermoplastic resin porous body layers 2, 12 outside is formed. The life of a lead-acid battery is improved. |
