Structured filter material for nicotine delivery products
Assigneedelfortgroup AG
InventorStefan Bachmann
Life of this patent
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Abstract
A filter material is described for manufacturing a nicotine delivery product, wherein the filter material is hydroentangled and contains at least 50% and at most 100% cellulose fibers, each with respect to the mass of the filter material, wherein the filter material has a basis weight of at least 25 g/m2 and at most 60 g/m2, and wherein the filter material has a structure that is characterized in that it provides the filter material with a transparency that, measured in accordance with DIN 53147:1993-01, is at least 45% and at most 70%. Furthermore, a segment comprising a filter material for a nicotine delivery product, a smoking article which comprises such a segment, an oral nicotine delivery product, and a process for the manufacture of the filter material are described.
Claims33
A filter material for manufacturing a nicotine delivery product, wherein the filter material is hydroentangled and contains at least 50% and at most 100% cellulose fibers, each with respect to the mass of the filter material, wherein the filter material has a basis weight of at least 25 g/m2 and at most 60 g/m2, and wherein the filter material has a structure that is characterized in that it provides the filter material with a transparency which, measured in accordance with DIN 53147:1993-01, is at least 45% and at most 70%.
A process for the manufacture of a filter material, which comprises the steps A to D:
- A—providing a fiber web comprising cellulose fibers,
- B—hydroentangling the fiber web by at least one water jet directed onto the fiber web in order to manufacture a hydroentangled fiber web,
- C—generating a structure in the hydroentangled fiber web,
- D—drying the hydroentangled fiber web,
- wherein the amount of cellulose fibers in step A is selected such that after drying in step D, the filter material contains at least 50% and at most 100% cellulose fibers with respect to the mass of the filter material, and
- after drying in step D, the filter material has a basis weight of at least 25 g/m2 and at most 60 g/m2, and
- wherein after drying in step D, said structure is characterized in that it provides the filter material with a transparency, measured in accordance with DIN 53147:1993-01, of at least 45% and at most 70%, and
- the generation of a structure in step C is carried out by directing at least one water jet onto the fiber web while the fiber web is supported by a surface that has a plurality of prominences.
Dependencies are inferred from the claim text.