FILTER ROD OF HEATED CIGARETTE, HAVING NATURAL FUNCTION OF AIR PASSAGE, AND HEATED CIGARETTE CONTAINING IT Russian patent published in 2023 - IPC A24D3/04 

FIELD: cigarette filters.

SUBSTANCE: group of inventions is related to a filter rod for a heated cigarette and a heated cigarette. A heated cigarette filter rod having a natural air-passing function, in combination with a smoke generating section, forms a heated cigarette, wherein in the direction from a side adjacent to the smoke generating section to a side adjacent to the lips of the end, said heated cigarette filter rod having a natural function air passage, sequentially contains a section for extracting smoke and a section with the function of a filter rod. The smoke extraction section and the filter rod section are covered with forming paper and lining paper on the outside. The smoke extraction section is a hollow structure that includes a tubular wall and a tubular cavity, wherein said tubular wall has an air-passing function to allow outside air to pass through air passage holes in said tubular wall to enter said tubular cavity. The lining paper is equipped with air holes. The lining paper is only partially wrapped around the smoke extraction section, wherein a portion of the smoke extraction section that is located in a region adjacent to the smoke generating section contains only forming paper on the outside and is not wrapped with said lining paper, wherein the forming paper is breathable, wherein it enables the smoke generating section to be combined with said heated cigarette filter rod having a natural air-passing function to produce a heated cigarette. The tipping paper is not breathable, but it is possible to control the air permeability of the smoke extraction section by adjusting the amount of area the tipping paper covers the smoke extraction section.

EFFECT: possibility to regulate the air permeability of the smoke extraction section by adjusting the size of the area covered with tipping paper.

8 cl, 4 dwg