A filter rod comprises a core of cellulose acetate fibers surrounded by a lofty porous network of charge retaining polymer fibers. The charge retaining fibers can be charged to attract and hold particles from such sources as particulate matter from sorbents (preventing break-through), and smoke constituents while having a suitable pressure drop.

Filters and cigarettes include an activated carbon sorbent capable of selectively removing nitric oxide from mainstream tobacco smoke. Methods for making cigarette filters and cigarettes using the activated carbon sorbent and methods for treating mainstream tobacco smoke produced by smoking a cigarette comprising the sorbent are also provided.

A filtration apparatus for filtering air is described. It includes a disposable capsule defining an absorptive material space to hold a volume of absorptive material, where the disposable capsule further defines a set of capsule fluid inlets to permit fluid to move through the disposable capsule into and out of the absorptive material space. The apparatus further includes a reusable frame to support the disposable capsule, where the reusable frame defines a frame fluid inlet and the reusable frame is removably couplable to the disposable capsule to direct fluid passing through the filtration apparatus through a fluid passage through the frame fluid inlet and the absorptive space of the disposable capsule. Also disclosed is a set of injection molding molds for forming a filtration apparatus.

A smoke gas filter device and a tobacco product. The smoke gas filter device is formed with a smoke gas filter channel (L). The smoke gas filter channel (L) is provided with a graphene material segment (1). The graphene material segment (1) is a graphene material powder segment, a graphene material aerogel segment or a graphene material film segment. A graphene material is graphene and/or functionalized graphene. The smoke gas filter device has a large adsorption capacity, and the adsorption is firm, which helps to reduce amount of the toxic substances entering the human body in the smoke gas, reducing the harm to the human body while smoking.

A smoking article includes a smokable material and a filter downstream of the smokable material. The filter includes activated carbon material having a BET of between 1000 and 2000 m.sup.2/g and exhibiting less particle breakthrough than granulated coconut shell derived activated carbon currently used for filters of smoking articles.

A universal filtering mouthpiece for smoking devices comprising a flexible and substantially conical shaped body having a small diameter end and a large diameter end; a hollow smoke passage which runs axially through the conical shaped body from the small diameter end to the large diameter end; a filter cartridge housing centered axially at the mouthpiece end of the said flexible and substantially conical shaped body which communicates with the hollow smoke passage and capable of housing a removable filter; and a disposable, high-airflow filter cartridge consisting of a rigid cylindrical frame having rounded edges, the rigid cylindrical frame housing a smoke filter inside the inner diameter of said rigid cylindrical frame. The universal filtering mouthpiece for smoking devices is readily implementable across a wide variety of smoking devices such as, but not limited to, pipes, bongs, hookahs, water pipes, electronic cigarettes, cigarettes, and pre-roll cigarettes.

A filtering apparatus for filtering particles out of cigarette smoke includes a tube having a smoking end and a suction end, and a perimeter wall which is gas impermeable. A first filter is coupled to and is positioned within the tube adjacent to the suction end. The first filter comprises a first filtering substance that is gas permeable and is configured for capturing particulates in smoke when the smoke flows through the first filtering substance. The first filtering substance comprises cotton wool. A second filter is coupled to and is positioned within the tube adjacent to the first filter. The second filter comprises a second filtering substance that is gas permeable and is configured for capturing particulates in the smoke when the smoke flows through the second filtering substance. The second filtering substance comprises one of coconut activated carbon and bamboo activated carbon.

A non-combustion-heating-type stick comprising: a substrate that includes an aerosol source; a cooling portion that produces an aerosol by cooling a vapor produced by heating the substrate; and a filter portion that is disposed in an area through which the aerosol passes, wherein at least one of the substrate, the cooling portion, and the filter portion contains a porous adsorbent.

The invention discloses a filter-tipped cigarette comprising a filter tip. The filter tip comprises a plurality of filter elements twisted together by mutually winding. All the filter elements are cellulose acetate fiber bundles. In the invention, since the filter elements are disposed in the way of winding, a total length of the filter elements is increased, a travel of a smoke passing through the filter elements is thereby increased, and thus harmful ingredients in the cigarette are filtered more thoroughly.

There is provided an electronic vapor provision system comprising: a vaporizer for vaporizing liquid for inhalation by a user of the electronic vapor provision system; a power supply comprising a cell or battery for supplying power to the vaporizer; and a filter for filtering vaporized liquid prior to inhalation by the user of the electronic vapor provision system, wherein the filter can partially or completely remove from the vapor one or more aldehydes present in the vapor.