Hydro-entangled filter material for smoking products
US12324456B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 2019 |
| Grant date | Jun 10, 2025 |
| Priority date | — |
| Expiry date | Jan 29, 2041 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD04H1/492
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.