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US 9,172,074 B2Granted
Nonwoven material with particle filler
AssigneeCarl Freudenberg KG
InventorsChristoph Weber, Michael Roth, Peter Kritzer, Gunter Scharfenberger, Rudolf Wagner
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Abstract
A ply includes a fibrous nonwoven web fabric forming a foundational structure, wherein the foundational structure includes fibers forming first pores and is partially filled with particles, wherein the particles at least partially fill the first pores so as to form regions filled with particles, wherein the particles in the filled regions form second pores, and wherein an average diameter of the particles is greater than an average pore size of more than 50% of the second pores.
Claims24
A separator configured for a battery or a capacitor, the separator comprising:
- a fibrous nonwoven web fabric forming a foundational structure;
- and
- a binder, which is applied as an aqueous dispersion,
- wherein the foundational structure includes fibers forming first pores and is at least partially filled with inorganic particles,
- wherein the inorganic particles at least partially fill the first pores so as to form regions filled with particles,
- wherein the inorganic particles in the filled regions form second pores,
- wherein the first and second pores form a labyrinthine microstructure in which dendritic interpenetration from one side to another of the layer cannot take place, and
- wherein an average diameter of the inorganic particles is greater than an average pore size of the second pores.
5 more elements
Dependencies are inferred from the claim text.