Mechanically reinforced high porosity partially fused glass fiber galvanic separator
AssigneesCompagnie Europeenne d'Accumulateurs, Societe Fulmen
InventorsJohann Pitsch, Pierre Lasserre
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Abstract
A separator for a galvanic element wherein partially fused glass fibers are coated by a coating consisting of grains of thermo-hardening synthetic material immersed in a natural or synthetic latex to mechanically reinforce the knots in the glass fiber network resulting from partial fusion of the glass fibers without blocking the pores of the partially fused fiber network.
Claims5
In a separator for a galvanic element comprising glass fibers agglomerated by partial fusion and having a diameter of a few microns, the improvement comprising:
- a thermal hardened coating on said agglomerated fibers, said coating consisting of grains of thermo-hardened, synthetic material immersed in a natural or synthetic latex;
- said synthetic material and said natural or synthetic latex being in sufficient amount such that said thermal hardened coating of grains of thermo-hardened synthetic material immersed in said natural or synthetic latex acts to mechanically reinforce the knots in the glass fiber network resulting from partial fusion of the glass fibers without blocking the pores of the partially fused fiber network.
A process for the manufacture of a separator comprising the steps of:
- agglomerating by partial fusion glass fibers having a diameter of a few microns,
- coating said agglomerated fibers with a coating comprising equal parts of a thermo-hardening resin in an aqueous solution and synthetic latex dispersed in water, and
- drying said coated separator in a drying oven to dry the latex and polymerize the resin.
Dependencies are inferred from the claim text.