US 12,324,456 B2 · Hydro-entangled filter material for smoking products

Abstract

The invention relates to a filter material for a smoking product, comprising a nonwoven material, wherein the nonwoven material is hydro-entangled, the hydro-entangled nonwoven material contains min. 50% and max. 90% wood cellulose fibres, min. 10% and max. 50% fibres from regenerated cellulose and less than 30% non-natural polymers, in relation to the mass of the hydro-entangled nonwoven material, and together the amount of wood cellulose fibres and fibres from regenerated cellulose make up at least 70% of the mass of the hydro-entangled nonwoven material, and the hydro-entangled nonwoven material has a density of min 100 kg/m3 and max. 300 kg/m3 and a thickness of min. 100 μm and max. 1000 μm. The invention also relates to a segment with the filter material, a smoking product and a production method.

Claims39

Dependent claims

Filter material for a smoking article, which comprises a nonwoven, characterized in that

the nonwoven is hydro-entangled,
the hydro-entangled nonwoven contains at least 50% and at most 90% wood pulp fibers, at least 10% and at most 50% fibers from regenerated cellulose and less than 30% non-natural polymers, respectively with respect to the mass of the hydro-entangled nonwoven, and the amount of wood pulp fibers and fibers from regenerated cellulose together makes up at least 70% of the mass of the hydro-entangled nonwoven, and
the hydro-entangled nonwoven has a density of at least 100 kg/m3 and at most 300 kg/m3 and a thickness of at least 100 μm and at most 1000 μm, wherein the thickness is measured in accordance with ISO 534:2011 and the density of the hydro-entangled nonwoven is determined by dividing the basis weight in accordance with ISO 536:2012 by the thickness in accordance with ISO 534:2011, wherein the wood pulp fibers are at least partially bleached.

Process for the production of a hydro-entangled nonwoven, wherein the process comprises the following steps:

A—producing an aqueous suspension comprising wood pulp fibers and fibers from regenerated cellulose, wherein the wood pulp fibers are at least partially bleached,
B—applying the suspension from step A to a running wire,
C—de-watering the suspension through the running wire, to form a fiber web,
D—transferring the fiber web from step C to a support wire,
E—hydro-entangling the fiber web by means of at least one water jet directed onto the fiber web, in order to manufacture the hydro-entangled nonwoven and
F—drying the hydro-entangled nonwoven,
wherein the amount of wood pulp fibers and fibers from regenerated cellulose together makes up at least 70% of the mass of the solids in the suspension of step A,
wherein the hydro-entangled nonwoven contains at least 50% and at most 90% wood pulp fibers, at least 10% and at most 50% fibers from regenerated cellulose and less than 30% non-natural polymers, respectively with respect to the mass of the finished hydro-entangled nonwoven, and
wherein the hydro-entangled nonwoven has a density of at least 100 kg/m3 and at most 300 kg/m3 and a thickness of least 100 μm and at most 1000 μm, wherein the thickness is measured in accordance with ISO 534:2011 and the density of the hydro-entangled nonwoven is determined by dividing the basis weight in accordance with ISO 536:2012 by the thickness in accordance with ISO 534:2011.

6 more elements

Dependencies are inferred from the claim text.

Hydro-entangled filter material for smoking products

Life of this patent

Hydro-entangled filter material for smoking products

Life of this patent

Abstract

Claims39