Filter, filter element, aerosol generating article and tobacco heating article

Abstract

The utility model provides a filter, which is used in an aerosol generating product and comprises a first longitudinal extending core part containing a first filtering material, a second longitudinal extending core part containing a second filtering material, a second longitudinally extending core comprising a second filter material, the second longitudinally extending core having a pressure drop of from 0.1 mmWG to 1 mmWG per millimeter length; and a wrap joined around the first longitudinally extending core and the second longitudinally extending core; each of the first filter material and the second filter material comprises paper and / or a biodegradable material other than paper; the second longitudinally extending core is formed of paper and / or a biodegradable material other than paper that gathers laterally in the form of a rod and is held in place. The utility model further provides a filter element, an aerosol generating product and a tobacco heating product.

Description

Technical Field

[0001] The present invention provides sustainable filters and filter elements for use with aerosol-generating articles, such as tobacco heating products, heat-not-burn (HNB) products or heated tobacco products (HTP). Background Art

[0002] Tobacco heating products [heat-not-burn (HNB) products or heated tobacco products (HTP)] are well known. The concept of tobacco heating products is to heat tobacco to a specific temperature (such as 350°C) without burning it. This delivers a vapor containing nicotine, and it is believed that heating without burning avoids the production of combustion products that are harmful to consumers.

[0003] Tobacco heating products (HNB products or HTPs) may include modified tobacco plugs and other mouthpiece elements that are wrapped in paper filter plug wraps to provide a cigarette-like appearance. In one such product, a reconstituted tobacco plug, a wrapped hollow acetate tube, a wrapped PLA [poly (lactic acid)] plug, and a conventional wrapped acetate segment (located at the mouth end) are wrapped in white paper. In use, the product is first inserted into a device with a heating element in the form of a heating sheet with the tobacco end so that when the product is pushed into the device, the heating sheet enters the tobacco plug. The heating sheet heats the tobacco so that the product can then be "sucked" by a consumer who draws at the mouth end of the product. The function of the "filter" in these products is very different from that of a cigarette filter; the main function is to provide the appearance and feel of a cigarette and also cool the vapor to a temperature acceptable to the consumer. In the above-mentioned products, the PLA segment performs an important cooling function and therefore the PLA segment can be considered a cooling element.

[0004] For cooling elements, it is known to use materials such as PLA. More recently, cellulose acetate has been used for cooling elements, as discussed in WO2021 / 074222.

[0005] However, cellulose acetate and PLA are not readily biodegradable. Therefore, aerosol-generating article components, such as filter elements and cooling elements containing cellulose acetate, can persist in the environment for many years. Therefore, and in view of the new EU regulations coming into force in 2021 (aimed at reducing the use of single-use plastics such as cellulose acetate filters), there is an increasing interest in filters that do not include single-use plastics and are readily biodegradable.

[0006] Therefore, there is a need for a filter that provides acceptable vapor cooling and acceptable filtration performance in a HNB product or HTP while having improved biodegradability compared to conventional materials, such as cellulose acetate. Utility Model Content

[0007] According to the utility model, in a first aspect, a (e.g., biodegradable, e.g., easily biodegradable) filter for use in an aerosol-generating product (e.g., a tobacco heating product and / or an HNB product or an HTP) is provided, the filter comprising: a first longitudinally extending (e.g., cylindrical) core, the first longitudinally extending core comprising a first filter material; a second longitudinally extending (e.g., cylindrical) core, the second longitudinally extending core comprising a second filter material (e.g., paper, e.g., uncoated paper, coated paper, siliconized paper), wherein the second longitudinally extending core has a pressure drop from 0.1 mmWG to 1 mmWG per millimeter of length, e.g., a pressure drop from 0.31 mmWG to 0.7 mmWG per millimeter of length, e.g., a pressure drop from 0.5 mmWG to 0.6 mmWG per millimeter of length; and a wrapper (e.g., a filter wrapper), the wrapper being joined around the first longitudinally extending core and the second longitudinally extending core; wherein each of the first filter material and the second filter material comprises paper and / or other biodegradable material (e.g., a material not containing cellulose acetate). The second longitudinally extending core has a pressure drop from 0.1mmWG to 1mmWG per millimeter of length, for example, a pressure drop from 0.31mmWG to 0.7mmWG per millimeter of length, for example, a pressure drop from 0.5mmWG to 0.6mmWG per millimeter of length, for example, a pressure drop from 0.53mmWG to 0.57mmWG per millimeter of length, for example, a pressure drop of 0.55mmWG per millimeter of length. Preferably, the second longitudinally extending core has a pressure drop from 0.5mmWG to 0.6mmWG per millimeter of length, for example, a pressure drop from 0.53mmWG to 0.57mmWG per millimeter of length, for example, a pressure drop of 0.55mmWG per millimeter of length. In some examples of the present invention, the first longitudinally extending core is longitudinally spaced apart from the second longitudinally extending core so that the wrapper defines a cavity between the first longitudinally extending core and the second longitudinally extending core.

[0008] The second longitudinally extending core has a cooling effect (eg has a cooling effect on the aerosol drawn through the second longitudinally extending core and / or the filter).

[0009] The first longitudinally extending core may be formed of paper (e.g. uncoated paper, coated paper, siliconized paper, e.g. Puracel FM26, Puracel FM36 and / or Greenbutts) and / or other biodegradable material, which is gathered laterally into a stick form and held in place (e.g. by a wrapper, e.g. by the first core wrapper). The first longitudinally extending core may be formed of paper (e.g. uncoated paper, coated paper, siliconized paper, e.g. Puracel FM26, Puracel FM36 and / or Greenbutts) and / or other biodegradable material having a width of 20mm to 350mm, e.g. 200mm to 350mm, e.g. 250mm to 350mm, e.g. 251mm to 350mm, e.g. 280mm to 320mm, e.g. 300mm, which is gathered laterally into a stick form and held in place (e.g. by a wrapper, e.g. by the first core wrapper). It will be understood that the first longitudinally extending core may have a wrapper (e.g., a first core wrapper) that holds the filter material in a certain shape (e.g., in the form of a core, such as in the form of a rod or a plug). The wrapper (e.g., the first core wrapper) is separated from the wrapper (e.g., the filter wrapper) that surrounds the first longitudinally extending core and the second longitudinally extending core. If there is a wrapper (e.g., the first core wrapper) for the first longitudinally extending core, it will be understood that the wrapper (e.g., the filter wrapper) that surrounds the first longitudinally extending core and the second longitudinally extending core is wrapped around the wrapper (e.g., the first core wrapper) of the first longitudinally extending core and the first longitudinally extending core itself.

[0010] The second longitudinally extending core may be formed of paper (e.g. uncoated paper, coated paper, siliconized paper, e.g. ZNP paper) and / or other biodegradable material that is gathered laterally into a rod form and held in place (e.g. by a wrapper, e.g. a second core wrapper). The second longitudinally extending core may be formed of paper (e.g. uncoated paper, coated paper, siliconized paper, e.g. ZNP paper) and / or other biodegradable material having a width of 20 mm to 350 mm, e.g. a width of 200 mm to 350 mm, e.g. a width of 250 mm to 350 mm, e.g. a width of 251 mm to 350 mm, e.g. a width of 280 mm to 320 mm, e.g. 300 mm, that is gathered laterally into a rod form and held in place (e.g. by a wrapper, e.g. a second core wrapper). As mentioned above, it is preferred that the second longitudinally extending core has a pressure drop of from 0.5 mmWG to 0.6 mmWG per mm length, for example, a pressure drop of from 0.53 mmWG to 0.57 mmWG per mm length, for example, a pressure drop of 0.55 mmWG per mm length. The density of the second longitudinally extending core having a pressure drop of from 0.5 mmWG to 0.6 mmWG per mm length and formed of 300 mm wide paper will be 0.269 g / cm 3 Preferably, the density of the second longitudinally extending core is from 0.215 g / cm 3 Up to 0.33g / cm 3 , for example 0.22g / cm 3 Up to 0.31g / cm 3 , for example 0.24g / cm 3 Up to 0.30g / cm 3 , for example 0.25g / cm 3 Up to 0.29g / cm 3 , for example 0.26g / cm 3 Up to 0.275g / cm 3 , for example 0.269 g / cm 3 . It will be understood that the second longitudinally extending core may have a wrapper (e.g., a second core wrapper) that holds the filter material in a certain shape (e.g., in the form of a core, such as in the form of a rod or a plug). The wrapper (e.g., the second core wrapper) is separated from the wrapper (e.g., the filter wrapper) that surrounds the first longitudinally extending core and the second longitudinally extending core. If there is a wrapper (e.g., the second core wrapper) for the second longitudinally extending core, it will be understood that the wrapper (e.g., the filter wrapper) that surrounds the first longitudinally extending core and the second longitudinally extending core is wrapped around the wrapper (e.g., the second core wrapper) of the second longitudinally extending core and the second longitudinally extending core itself.

[0011] The filter can also include a third longitudinally extending core. The third longitudinally extending core includes a third filter material (e.g., paper, for example, uncoated paper, coated paper, siliconized paper, for example, ZNP paper), wherein the third longitudinally extending core has a pressure drop from 0.5mmWG to 0.6mmWG per millimeter of length. The third longitudinally extending core includes paper and / or other biodegradable materials (e.g., materials that do not contain cellulose acetate). If there is a third longitudinally extending core, a wrapper (e.g., a filter wrapper) engages around the first longitudinally extending core and the second longitudinally extending core and the third longitudinally extending core. The third longitudinally extending core has a pressure drop from 0.1mmWG to 1mmWG per millimeter of length, for example, 0.31mmWG to 0.7mmWG per millimeter of length, for example, a pressure drop from 0.5mmWG to 0.6mmWG per millimeter of length, for example, a pressure drop from 0.53mmWG to 0.57mmWG per millimeter of length, for example, a pressure drop of 0.55mmWG per millimeter of length. Preferably, the third longitudinally extending core has a pressure drop of from 0.5mmWG to 0.6mmWG per millimeter of length, for example a pressure drop of from 0.53mmWG to 0.57mmWG per millimeter of length, for example a pressure drop of 0.55mmWG per millimeter of length. For example, the third longitudinally extending core may be positioned between the first longitudinally extending core and the second longitudinally extending core. The third longitudinally extending core may be formed of paper (e.g. uncoated paper, coated paper, siliconized paper, e.g. ZNP paper) and / or other biodegradable materials, which are laterally gathered into a rod form and held in place (e.g. by a wrapper, e.g. a third core wrapper). The third longitudinally extending core can be formed by paper (e.g., uncoated paper, coated paper, siliconized paper, e.g., ZNP paper) and / or other biodegradable materials having a width of 250 mm to 350 mm, e.g., 251 mm to 350 mm, e.g., 280 mm to 320 mm, e.g., 300 mm, which is laterally gathered into a rod form and held in place (e.g., by a wrapper, e.g., a third core wrapper). It will be understood that the third longitudinally extending core can have a wrapper (e.g., a third core wrapper) that holds the filter material in a certain shape (e.g., in the form of a core, e.g., in the form of a rod or a plug). The wrapper (e.g., the third core wrapper) is separated from the wrapper (e.g., a filter wrapper) that is engaged around the first longitudinally extending core and the second longitudinally extending core (and the third longitudinally extending core). If there is a wrap for the third longitudinally extending core (e.g., a third core wrap), it will be understood that the wrap (e.g., a filter wrap) that is joined around the first longitudinally extending core and the second longitudinally extending core (and the third longitudinally extending core) wraps around the wrap of the third longitudinally extending core (e.g., the third core wrap) as well as the third longitudinally extending core itself.

[0012] Applicants have surprisingly discovered that filters according to various aspects of the present invention combine biodegradability ("readily biodegradable") with comparable thermal profiles and / or comparable aerosol chemical delivery to products on the market using cellulose acetate and PLA. In addition, Applicants have discovered that filters of the present invention can be adapted to provide customizable designs to match desired aerosol chemical delivery profiles.

[0013] The first filter material may include easily biodegradable paper and / or other biodegradable materials. The second filter material may include easily biodegradable paper and / or other biodegradable materials. Preferably, each of the first filter material and the second filter material includes easily biodegradable paper and / or other biodegradable materials.

[0014] The term "biodegradable" as used herein refers to filter materials and filters that are capable of exhibiting at least 90% biodegradability after 6 months under controlled composting conditions (see ISO 14855-1 Determination of the ultimate aerobic biodegradability of plastic materials under controlled composting conditions - Method by analysis of evolved carbon dioxide).

[0015] Preferably, the paper and / or other biodegradable material (e.g., material not containing cellulose acetate) used in the filter material of the filter of the present invention is "readily biodegradable" and has enhanced biodegradability compared to cellulose acetate. Thus, the present invention provides a filter with enhanced biodegradability and is therefore more environmentally friendly and more compliant with EU regulations.

[0016] As used herein, the phrase "readily biodegradable" means that the filter material and filter are capable of rapidly breaking down and completely biodegrading when immersed in water. Preferably, the filter (and the filter material used in the filter) has a biodegradability at the 'readily biodegradable' level as measured according to the OECD 301B 'readily biodegradable' method (modified Sturm test) known in the art. Here, the phrase "readily biodegradable" will be understood to mean a biodegradability at the 'readily biodegradable' level.

[0017] The paper and / or other biodegradable material (e.g., cellulose acetate-free filter material) is preferably readily biodegradable. The paper and / or other biodegradable material (e.g., cellulose acetate-free filter material) may include any paper (in any form) conventionally used in filters or filter elements. The paper may be, for example, filter paper of various grades, open-pore paper, crepe paper, air-laid paper, or machine-glazed paper, etc. The fibers of the paper and / or other biodegradable material (e.g., cellulose acetate-free filter material) may be natural fibers (e.g., flax, hemp, sisal, jute, abaca, cotton, coconut shell fiber, bamboo fiber, starch (e.g., starch from corn) or tobacco) or any roll material. The paper may be woven or non-woven, or in the form of a coherent web or a longitudinally wrinkled and / or fibrillated web, the paper for example being gathered laterally into a plugging form and remaining in a plugging form. The paper and / or other biodegradable material (e.g., cellulose acetate-free filter material) may be in the form of a bonded web comprising a first paper and / or other biodegradable material (e.g., cellulose acetate-free filter material) and a second paper and / or other biodegradable material (e.g., cellulose acetate-free filter material). The paper and / or other biodegradable material (e.g., cellulose acetate-free filter material) may be in the form of a mixture of different paper materials and / or other biodegradable materials (e.g., cellulose acetate-free filter material). The paper filter material may have the same material as that sold under the trademark Essentra (of Essentra plc). or The same or similar structure as those sold below.

[0018] The first filter material may include readily biodegradable paper and / or other biodegradable materials. The first filter material may include paper and / or other biodegradable materials as described in the above paragraphs. In some examples, the first filter material includes Puracel FM26, Puracel FM36 and / or Greenbutts.

[0019] The second filter material may include biodegradable paper and / or other biodegradable materials. The second filter material may include paper and / or other biodegradable materials as described above. In some examples, the second filter material includes uncoated paper, coated paper and / or siliconized paper.

[0020] The third filter material may include easily biodegradable paper and / or other biodegradable materials. The third filter material may include paper and / or other biodegradable materials as described above. In some examples, the third filter material includes uncoated paper, coated paper and / or siliconized paper.

[0021] Preferably, the first filter material comprises a paper having a basis weight of from 20 gsm to 200 gsm. For example, the first filter material may be a paper having a basis weight of from 40 gsm to 180 gsm, for example from 60 gsm to 160 gsm, for example from 80 gsm to 140 gsm, for example from 100 gsm to 120 gsm, for example from 20 gsm to 60 gsm, for example from 30 gsm to 40 gsm.

[0022] Preferably, the second filter material comprises a paper having a basis weight of from 20 gsm to 200 gsm. For example, the second filter material may be a paper having a basis weight of from 40 gsm to 180 gsm, for example from 60 gsm to 160 gsm, for example from 80 gsm to 140 gsm, for example from 100 gsm to 120 gsm, for example from 20 gsm to 60 gsm, for example from 30 gsm to 40 gsm.

[0023] Preferably, the third filter material comprises a paper having a basis weight of from 20 gsm to 200 gsm. For example, the third filter material may be a paper having a basis weight of from 40 gsm to 180 gsm, for example from 60 gsm to 160 gsm, for example from 80 gsm to 140 gsm, for example from 100 gsm to 120 gsm, for example from 20 gsm to 60 gsm, for example from 30 gsm to 40 gsm.

[0024] The filter of the present invention can be cylindrical. The filter of the present invention can be cylindrical, wherein the circumference is from 12mm to 30mm (e.g., 15mm to 28mm), more preferably from 17mm to 25mm (e.g., 18mm to 25mm, e.g., 20mm to 24mm, e.g., 22mm to 24mm, e.g., 23mm, e.g., 22mm, e.g., 22.45mm).

[0025] The wrapper (e.g. filter wrapper) joined around the first longitudinally extending core and the second longitudinally extending core (and optionally the third longitudinally extending core) may be paper (e.g. filter plug wrap), preferably paper with a basis weight of 20gsm to 160gsm (e.g. filter plug wrap), such as paper with a basis weight of 24gsm to 150gsm (e.g. filter plug wrap), such as paper with a basis weight of 70gsm to 150gsm (e.g. filter plug wrap), such as paper with a basis weight of 70gsm to 140gsm (e.g. filter plug wrap). Preferably, the wrapper (e.g. filter wrapper) joined around the first longitudinally extending core and the second longitudinally extending core (and optionally the third longitudinally extending core) is biodegradable, more preferably readily biodegradable.

[0026] The wrapper for the first longitudinally extending core (e.g. the first core wrapper), if present, and / or the wrapper for the second longitudinally extending core (e.g. the second core wrapper), if present, may be paper (e.g. a plug wrap). The paper may be a paper having a basis weight of 20 to 160 gsm (e.g. a plug wrapper), such as a paper having a basis weight of 24 to 150 gsm (e.g. a plug wrapper), such as a paper having a basis weight of 70 to 150 gsm (e.g. a plug wrapper), such as a paper having a basis weight of 70 to 140 gsm (e.g. a plug wrapper). Preferably, the wrapper for the first longitudinally extending core (e.g. the first core wrapper), if present, and the wrapper for the second longitudinally extending core (e.g. the second core wrapper), if present, are biodegradable, more preferably readily biodegradable. The wrap for the first longitudinally extending core (eg the first core wrap) and the wrap for the second longitudinally extending core (eg the second core wrap) may be made of the same material or of different materials.

[0027] The wrapper for the third longitudinally extending core (e.g. the third core wrapper) may be a paper (e.g. a plug wrap). The paper may be a paper having a basis weight of 20 to 160 gsm (e.g. a plug wrap), such as a paper having a basis weight of 24 to 150 gsm (e.g. a plug wrap), such as a paper having a basis weight of 70 to 150 gsm (e.g. a plug wrap), such as a paper having a basis weight of 70 to 140 gsm (e.g. a plug wrap). Preferably, the wrapper for the third longitudinally extending core (e.g. the third core wrapper), if present, is biodegradable, more preferably readily biodegradable.

[0028] The length of the filter of the present invention can be 18mm to 60mm, for example 20mm to 50mm (for example, from 20mm to 35mm). Preferably, the length of the filter of the present invention is 30mm to 35mm, for example 31mm to 34mm, for example 33mm.

[0029] The first longitudinally extending core may have a length of 3 mm to 18 mm, such as a length of 3 mm to 11 mm, such as 6 mm to 10 mm, such as 6 mm, 7 mm, 8 mm, 9 mm or 10 mm.

[0030] The length of the second longitudinally extending core may be 7mm to 30mm, such as 17mm to 25mm, such as 18mm to 24mm, such as 18mm, 19mm, 20mm, 21mm, 22mm, 23mm or 24mm.

[0031] The third longitudinally extending core, if present, may have a length of 3 to 18 mm, such as a length of 3 to 11 mm, such as 6 to 10 mm, such as 6, 7, 8, 9 or 10 mm.

[0032] The cavity between the first and second longitudinally extending core, if present, may have a length of 4 to 10 mm, such as 5 to 9 mm, such as 5 mm, 6 mm, 7 mm, 8 mm or 9 mm.

[0033] Preferably, the pressure drop of the filter (longitudinally along the entire length of the filter) is 10 mmWG to 50 mmWG, such as 23 mmWG to 35 mmWG, such as 24 mmWG to 31 mmWG, such as 28 mmWG to 31 mmWG.

[0034] In one example, the filter of the present invention is 33 mm long and comprises: a first longitudinally extending core portion having a length of 10 mm; a second longitudinally extending core portion having a length of 18 mm; and a cavity having a length of 5 mm between the first longitudinally extending core portion and the second longitudinally extending core portion. Figure 1 This example is illustrated in .

[0035] In another example, the filter of the present invention is 33 mm long and includes: a first longitudinally extending core portion with a length of 8 mm; a second longitudinally extending core portion with a length of 18 mm; and a cavity with a length of 7 mm between the first longitudinally extending core portion and the second longitudinally extending core portion.

[0036] In another example, the filter of the present invention is 33 mm long and includes: a first longitudinally extending core portion with a length of 6 mm; a second longitudinally extending core portion with a length of 18 mm; and a cavity with a length of 9 mm between the first longitudinally extending core portion and the second longitudinally extending core portion.

[0037] In yet another example, the filter of the present invention is 33 mm long and includes a first longitudinally extending core portion of 9 mm in length abutting against a second longitudinally extending core portion of 24 mm in length. In this example, there is no cavity between the first longitudinally extending core and the second longitudinally extending core. Figure 2 This example is illustrated in .

[0038] In another example, the filter of the present invention is 33 mm long and includes: a first longitudinally extending core portion having a length of 8 mm; a second longitudinally extending core portion having a length of 18 mm; and a third longitudinally extending core portion having a length of 7 mm between the first longitudinally extending core portion and the second longitudinally extending core portion. In this example, there is no cavity between the first longitudinally extending core portion and the second longitudinally extending core portion.

[0039] The paper and / or other biodegradable materials (e.g., cellulose acetate-free filter material) of the first longitudinally extending core and / or the second longitudinally extending core can be coated with a hydrophobic coating or a hydrophobic material. Without wishing to be bound by theory, it is believed that the hydrophobic material in the filter material causes the water vapor in the element (e.g., cooling element) to condense in the element (e.g., cooling element), thereby providing a beneficial effect of cooling the water vapor as the water vapor passes through the element. Preferably, the hydrophobic material runs through the longitudinally extending (e.g., cylindrical) core distribution. The applicant has found that this provides optimal level of steam cooling and filtering to be used in tobacco heating products or HNB products. Hydrophobic coating / hydrophobic material can be any suitable hydrophobic material. For example, hydrophobic coating / hydrophobic material can be a mixture of polymers or polymers. Preferably, hydrophobic coating / hydrophobic material is starch, such as modified starch, such as oxidized starch (E1404). Starch, such as modified starch, is preferred because starch is inert and provides a non-plastic hydrophobic coating. The hydrophobic coating / hydrophobic material may be present in the following ratio of the weight of the hydrophobic coating / hydrophobic material relative to the weight of the associated longitudinally extending core: from 0.01% (w / w) to 50% (w / w), such as 0.01% w / w to 20% w / w, such as 0.1% w / w to 20% w / w, such as 5% w / w to 20% w / w, such as 10% w / w to 20% w / w, such as 0.1% w / w to 10% w / w, such as 0.1% w / w to 5% w / w, such as 0.5% w / w to 2.5% w / w. The hydrophobic coating may be applied to the paper and / or other biodegradable material (e.g., cellulose acetate-free filter material) of the first longitudinally extending core and / or the second longitudinally extending core by any standard coating method known in the art.

[0040] Preferably, the filter has a substantially circular cross section, which means that the element is substantially cylindrical in shape. However, the filter of the present invention can be of any shape. For example, the filter can have a circular cross section or an elliptical cross section or a square cross section or a rectangular cross section.

[0041] It will be understood that the filter of the present utility model can be used for any multi-segment filter or consumables.Multi-segment filter can include one, two, three, four or more additional separated sections.Other additional separated sections can be (e.g., cylindrical) plugging pieces and / or hollow (e.g., paper) tubular filters of tobacco smoke filtering materials (e.g., paper).Multi-segment filter can be attached to tobacco plugging pieces (this tobacco plugging piece can be made by any form of tobacco (including reconstituted tobacco)).Multi-segment filter can include other filter sections, and described other filter sections include filters containing capsules, carbon filters, CPS filters, tubular filters, paper filters, menthol filters, etc.

[0042] According to another aspect of the present invention, a (e.g., biodegradable, e.g., easily biodegradable) filter element is provided, the filter element comprising a longitudinally extending (e.g., substantially cylindrical) core having a pressure drop of from 0.1 mmWG to 1 mmWG per millimeter of length, e.g., a pressure drop of 0.31 mmWG to 0.7 mmWG per millimeter of length, e.g., a pressure drop of from 0.5 mmWG to 0.6 mmWG per millimeter of length (e.g., a pressure drop of from 0.53 mmWG to 0.57 mmWG per millimeter of length, e.g., a pressure drop of 0.55 mmWG per millimeter of length); the longitudinally extending (e.g., substantially cylindrical) core comprises a filter material having paper and / or other biodegradable materials (e.g., materials not containing cellulose acetate). The filter element may have a wrapper (e.g., a core wrapper), e.g., a paper wrapper, e.g., a biodegradable and / or easily biodegradable paper wrapper joined around the longitudinally extending core. The longitudinally extending core may be formed of paper (e.g. uncoated paper, coated paper, siliconized paper, e.g. ZNP paper) and / or other biodegradable material that is gathered laterally into a rod form and held in place (e.g. by a wrapper, e.g. a core wrapper). The longitudinally extending core may be formed of paper (e.g. uncoated paper, coated paper, siliconized paper, e.g. ZNP paper) and / or other biodegradable material having a width of 250 mm to 350 mm, e.g. 251 mm to 350 mm, e.g. 280 mm to 320 mm, e.g. 300 mm, that is gathered laterally into a rod form and held in place (e.g. by a wrapper, e.g. a core wrapper). Preferably, the longitudinally extending (e.g., generally cylindrical) core has a pressure drop of from 0.5 mmWG to 0.6 mmWG per mm length, for example, a pressure drop of from 0.53 mmWG to 0.57 mmWG per mm length, for example, a pressure drop of 0.55 mmWG per mm length. Preferably, the density of the longitudinally extending (e.g., generally cylindrical) core is from 0.215 g / cm 3 Up to 0.33g / cm3 , for example 0.22g / cm 3 Up to 0.31g / cm 3 , for example 0.24g / cm 3 Up to 0.30g / cm 3 , for example 0.25g / cm 3 Up to 0.29g / cm 3 , for example 0.26g / cm 3 Up to 0.275g / cm 3 , for example 0.269 g / cm 3 .

[0043] The filter element has a cooling effect (e.g., has a cooling effect on the aerosol drawn through the longitudinally extending core and / or any filter comprising the filter element). It will be understood that the term "element" or "filter element" as used herein refers to any separated section that can be used for a filter or aerosol-generating article. The element can be a cooling element. It will be understood that the term "cooling element" as used herein refers to a separated section that provides an important cooling function, i.e., reduces the temperature of the aerosol or vapor as it passes along the length of the element.

[0044] The term "biodegradable" as used herein refers to filter materials and filter elements that can show at least 90% biodegradation after 6 months under controlled composting conditions (see ISO 14855-1 Determination of the ultimate aerobic biodegradability of plastic materials under controlled composting conditions - method by analyzing the released carbon dioxide). Preferably, the paper and / or other biodegradable materials (e.g., materials that do not contain cellulose acetate) used in the filter material of the (filter) element of the present invention are "readily biodegradable" and have enhanced biodegradability compared to cellulose acetate. Therefore, the present invention provides a filter element with enhanced biodegradability and is therefore more environmentally friendly and more compliant with EU regulations.

[0045] As used herein, the phrase "readily biodegradable" means that the filter material and the element are capable of rapid decomposition and complete biodegradation when immersed in water. Preferably, the element has a biodegradability at the 'readily biodegradable' level as measured according to the OECD 301B 'readily biodegradable' method (modified Sturm test) known in the art. Here, the phrase "readily biodegradable" will be understood to mean a biodegradability at the 'readily biodegradable' level.

[0046] The paper and / or other biodegradable material (e.g., cellulose acetate-free filter material) is preferably readily biodegradable. The paper and / or other biodegradable material (e.g., cellulose acetate-free filter material) may include any paper (in any form) conventionally used in filters or filter elements. The paper may be, for example, filter paper of various grades, open-pore paper, crepe paper, air-laid paper, or machine-glazed paper, etc. The fibers of the paper and / or other biodegradable material (e.g., cellulose acetate-free filter material) may be natural fibers (e.g., flax, hemp, sisal, jute, abaca, cotton, coconut shell fiber, bamboo fiber, starch (e.g., starch from corn) or tobacco) or any roll material. The paper may be woven or non-woven, or in the form of a coherent web or a longitudinally wrinkled and / or fibrillated web, the paper for example being gathered laterally into a plugging form and remaining in a plugging form. The paper and / or other biodegradable material (e.g., cellulose acetate-free filter material) may be in the form of a bonded web comprising a first paper and / or other biodegradable material (e.g., cellulose acetate-free filter material) and a second paper and / or other biodegradable material (e.g., cellulose acetate-free filter material). The paper and / or other biodegradable material (e.g., cellulose acetate-free filter material) may be in the form of a mixture of different paper materials and / or other biodegradable materials (e.g., cellulose acetate-free filter material). The paper filter material may have the same material as that sold under the trademark Essentra (of Essentra plc). or The same or similar structure as those sold below.

[0047] The filter material may include biodegradable paper and / or other biodegradable materials. The filter material may include the above-mentioned paper and / or other biodegradable materials. In some examples, the filter material includes uncoated paper, coated paper and / or siliconized paper. Preferably, the filter material includes a paper with a basis weight of from 20gsm to 200gsm. For example, the filter material may be a paper with a basis weight of from 40gsm to 180gsm, for example from 60gsm to 160gsm, for example from 80gsm to 140gsm, for example from 100gsm to 120gsm, for example from 20gsm to 60gsm, for example from 30gsm to 40gsm. The filter element of the present invention may be cylindrical. The filter element of the present invention can be cylindrical, wherein the circumference is from 12mm to 30mm (for example, 15mm to 28mm), more preferably from 17mm to 25mm (for example, 18mm to 25mm, for example, 20mm to 24mm, for example, 22mm to 24mm, for example, 23mm, for example, 22mm, for example, 22.45mm).

[0048] The wrapper engaged around the longitudinally extending core (e.g. core wrapper) may be paper (e.g. plug wrap), preferably paper with a basis weight of 20 to 160 gsm (e.g. plug wrap), such as paper with a basis weight of 24 to 150 gsm (e.g. plug wrap), such as paper with a basis weight of 70 to 150 gsm (e.g. plug wrap), such as paper with a basis weight of 70 to 140 gsm (e.g. plug wrap). Preferably, the wrapper engaged around the longitudinally extending core (e.g. core wrapper) is biodegradable, more preferably readily biodegradable.

[0049] The length of the filter element (and the longitudinally extending core) can be 7mm to 30mm, for example 17mm to 25mm, for example 18mm to 24mm, for example 7mm, 8mm, 9mm, 10mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm or 24mm.

[0050] The paper and / or other biodegradable material (eg, cellulose acetate-free filter material) of the longitudinally extending core may be coated with a hydrophobic coating or material as described above.

[0051] It will be understood that the filter element of the present utility model can be used for any multi-section filter or consumables. The filter structure can be two, three, four or more separated sections. Other sections of separation can be tobacco smoke filtering materials (e.g., paper) and / or hollow (e.g., paper) tubular filters (e.g., cylindrical) plugging pieces. Multi-section filter can be attached to tobacco plugging pieces (this plugging piece can be made by any form of tobacco (including reconstituted tobacco)). Multi-section filter can include other filter sections, and described other filter sections include filters containing capsules, carbon filters, CPS filters, tubular filters, paper filters, menthol filters, etc.

[0052] It will be appreciated that filters or filter elements according to the present invention may be manufactured by methods and machines known in the art.

[0053] According to another aspect of the present invention, there is provided an aerosol-generating article (eg a cigarette, eg a tobacco heating product, HNB product) comprising a filter or a filter element according to any aspect of the present invention.

[0054] The filter or filter element of the utility model is suitable for all kinds of tobacco mixtures.

[0055] In an aerosol-generating article according to the present invention, the filter of the present invention (or a filter comprising a filter element of the present invention) can be coupled to a wrapped tobacco plug (e.g., a wrapped modified tobacco plug as known in the art). The filter of the present invention (or a filter comprising a filter element of the present invention) can be coupled to a wrapped tobacco plug so that a (second) longitudinally extending core having a pressure drop of from 0.1 mmWG to 1 mmWG per millimeter of length, for example, from 0.31 mmWG to 0.7 mmWG per millimeter of length, for example, from 0.5 mmWG to 0.6 mmWG (e.g., 0.55 mmWG) per millimeter of length is adjacent to the tobacco plug. The filter can be coupled to the wrapped tobacco plug by an annular tipping portion (i.e., an outer wrapper (e.g., tipping paper) that is engaged only around the adjacent ends of the wrapped filter and the tobacco plug to expose most of the filter wrapping to the outside). The filter may be joined to the wrapped tobacco plugging piece by a complete tipping wrapper (i.e., an outer wrapper (e.g., tipping paper) that is joined around the entire wrapped filter length and the adjacent end of the tobacco plugging piece). The wrapper (e.g., filter wrapper) may be ventilated by, for example, laser perforation. A ventilator may be applied to the wrapper (e.g., filter wrapper) before or after the filter is joined to the wrapped tobacco plugging piece. The ventilator may (applied to the wrapper) be in register with the cavity (if present) in the filter.

[0056] The tobacco heating product and / or HNB product or HTP according to the present invention may also include one or more separate other sections (e.g., of the HNB mouthpiece). The separate other sections may be (e.g., cylindrical) plugging pieces of tobacco smoke filtering material (e.g., paper), (e.g., cylindrical) tobacco (e.g., any form of tobacco (including reconstituted tobacco)) rods, hollow (e.g., paper) tubes, filters containing capsules, carbon filters, CPS filters, tubular filters, acetic acid filters, paper filters, menthol-containing filters, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] The present invention will now be described in further detail with reference to the accompanying drawings, in which:

[0058] Figure 1 A partially cutaway perspective view of a filter according to one embodiment of the utility model is shown, wherein the filter includes a filter element according to another embodiment of the utility model;

[0059] Figure 2 Another embodiment of the present invention is shown. Figure 1 A partially cutaway perspective view of a filter (different from the filter of the present invention), the filter comprising a filter element according to another embodiment of the present invention;

[0060] Figure 3 is a graphical representation of how the temperature at the mouth end of HTPs comprising filters and filter elements according to the invention (Examples SAM111426-10-150, SAM111426-8-150 and SAM111426-6-150) and the reference product Amber HEETS varies with the puffs taken (see Example 1). DETAILED DESCRIPTION

[0061] Figure 1 A partially cut-away perspective view of a filter 1 for use in an aerosol-generating article (eg a tobacco heating product and / or a HNB product and / or a HTP) is illustrated.The filter 1 is cylindrical in shape with a length of 33 mm and a circumference of 22.45 mm.

[0062] The filter 1 comprises a first longitudinally extending core 3 of cylindrical shape having a circumference of 22.45 mm and a length of 10 mm at the mouth end 2. The first longitudinally extending core 3 of cylindrical shape is made of a sheet of Puracel FM26 paper ([Essentra plc] 300 mm FM26g / m 2 A plugging piece of first filter material in the form of 100 gsm SWM) is formed, the papers being gathered together laterally into the plugging piece form and held in place using a first core wrapper 5 of a non-porous plugging wrapper weighing 78 gsm [from Mudanjiang Hengfeng Paper Co., Ltd, Mudanjiang, China].

[0063] The filter 1 also includes a cylindrical second longitudinally extending core 7 longitudinally spaced 5 mm apart from the cylindrical first longitudinally extending core 3. The cylindrical second longitudinally extending core 7 has a circumference of 22.45 mm and a length of 18 mm. The cylindrical second longitudinally extending core 7 includes a plugging member of a second filter material in the form of a ZNP paper sheet (obtained from PT Bukit Muria Jaya (BMJ) in West Java, Indonesia) with a width of 300 mm, which is laterally gathered into a rod form and held in place using a second core wrapper 9 of a non-porous plugging wrapper (from Mudanjiang Hengfeng Paper Co., Ltd. in Mudanjiang, China) with a weight of 78 gsm. The second longitudinally extending core has a pressure drop of 0.55 mmWG per millimeter of length.

[0064] [from Mudanjiang Hengfeng Paper Co., Ltd., Mudanjiang, China] weight 78g / m 2A further filter wrap 11 of a rigid plugging wrap of 100 mm is joined around the wrapped longitudinally extending cores 3 and 7 to define a cavity 13 of length 5 mm between the wrapped longitudinally extending cores 3 and 7. The two ends of the further wrap 11 are flush with the ends of the wrapped cores 3 and 7. The filter wrap 11 has overlapping longitudinal edges having: an adhesive applied on the longitudinal edges, the adhesive providing an overlapping and adhered seam (not shown) holding the further wrap 11 around the wrapped cores 3 and 7; and a further adhesive in an anchor line (not shown) in register with the wrapped cores 3 and 7 to hold the cores in place.

[0065] The first longitudinally extending core 3 and the second longitudinally extending core 7, the corresponding first core wraps 5 and second core wraps 9 of the first core 3 and the second core 7, and the filter wrap 11 are all made of paper material and are all "readily biodegradable", which means that each of the above is capable of rapidly decomposing and completely biodegrading when immersed in water, so that the filter 1 (and the materials in the filter 1) have a biodegradability level as measured according to the OECD 301B 'ready biodegradability' method (modified Sturm test) known in the art.

[0066] Applicants have surprisingly discovered that filters such as Filter 1 combine biodegradability (being "readily biodegradable") with comparable thermal profiles and / or comparable aerosol chemical delivery to products on the market using cellulose acetate and PLA (see Example 1 below). In addition, Applicants have discovered that the filters of the present invention can be adapted to provide a customizable design to match a desired aerosol chemical delivery profile.

[0067] It will be appreciated that the filter 1 may be made by methods known in the art and may be prepared as a multi-part rod comprising a plurality (e.g., 2, 4, 6, etc.) of filters or filter rods integrally joined end to end.

[0068] The filter 1 can be joined to a wrapped modified tobacco plug at the end opposite to the mouth end 2 by methods known in the art. Suitable plugs for reconstituted tobacco are 12 mm long and have a circumference of 22 mm. Such reconstituted tobacco plugs are known in the art. The filter and tobacco plug together form an HNB product or HTP including the filter 1 of the utility model.

[0069] In use, the tobacco plugging piece end of the HNB product or HTP including the filter 1 of the utility model is inserted into the HTP device. The plugging piece is heated by a heating device (HTP device) in use to produce steam, as is known in the art. This produces hot steam that is first drawn to the mouth (i.e., the mouth end) of the smoker through the second longitudinally extending core 7 of the cylindrical shape, through the cavity 13, and through the first longitudinally extending core 3 of the cylindrical shape. It is believed that drawing the hot steam through the second longitudinally extending core 7 with a pressure drop of 0.55 mmWG per millimeter of length has a cooling effect (e.g., a cooling effect on the aerosol drawn through the second longitudinally extending core and / or the filter), which cools the steam to a temperature acceptable to the user.

[0070] Figure 2 A schematic diagram of another embodiment of the present invention is shown. Figure 2 A filter 101 is shown for use in an aerosol-generating article (eg a tobacco heating product and / or a HNB product and / or a HTP).The filter 101 is cylindrical in shape with a length of 33 mm and a circumference of 22.45 mm.

[0071] The filter 101 comprises a first longitudinally extending core 103 of cylindrical shape having a circumference of 22.45 mm and a length of 9 mm at the mouth end 102. The first longitudinally extending core 103 of cylindrical shape is made of a sheet of Puracel FM26 paper ([Essentra plc] 300 mm FM26g / m 2 A plugging piece of first filter material in the form of Puracel FM26 paper (SWM) is formed, the Puracel FM26 paper being gathered together laterally into the plugging piece form and held in place using a first core wrap 105 of a non-porous plugging wrap having a weight of 78 gsm [obtained from Mudanjiang Hengfeng Paper Co., Ltd, Mudanjiang, China].

[0072] The filter 101 also includes a cylindrical second longitudinally extending core 107 abutting the cylindrical first longitudinally extending core 103 at the end opposite to the mouth end 102. The cylindrical second longitudinally extending core 107 has a circumference of 22.45 mm and a length of 24 mm. The cylindrical second longitudinally extending core 107 includes a plugging member of a second filter material in the form of a ZNP paper sheet (obtained from PT Bukit Muria Jaya (BMJ) in West Java, Indonesia) with a width of 300 mm, which is laterally gathered into a rod form and held in place using a second core wrapper 109 of a non-porous plugging wrapper (from Mudanjiang Hengfeng Paper Co., Ltd. in Mudanjiang, China) with a weight of 78 gsm. The second longitudinally extending core has a pressure drop of 0.55 mmWG per millimeter of length.

[0073] [from Mudanjiang Hengfeng Paper Co., Ltd., Mudanjiang, China] weight 78g / m 2 Another filter wrap 111 of a rigid plugging wrap of the type described above is joined around the wrapped cores 103 and 107. The two ends of the other wrap 111 are flush with the ends of the wrapped cores 103 and 107. The other wrap 111 has overlapping longitudinal edges with: adhesive applied on the longitudinal edges, the adhesive providing an overlapping and sticking seam (not shown) that holds the other wrap 111 around the wrapped cores 103 and 107; and another adhesive located in an anchor line (not shown) in register with the wrapped cores 103 and 107 to hold the cores in place.

[0074] The first longitudinally extending core 103 and the second longitudinally extending core 107, the corresponding first core wraps 105 and second core wraps 109 of the first core 103 and the second core 107, and the further wrap 111 are all made of paper material and are all "readily biodegradable", which means that each of the above is capable of rapidly decomposing and completely biodegrading when immersed in water, so that the filter 101 (and the materials in the filter 101) have a biodegradability level as measured according to the OECD 301B 'ready biodegradability' method (modified Sturm test) known in the art.

[0075] Applicants have surprisingly discovered that filters such as filter 101 combine biodegradability (being "readily biodegradable") with comparable thermal profiles and / or comparable aerosol chemical delivery to products on the market using cellulose acetate and PLA. In addition, Applicants have discovered that the filters of the present invention can be adapted to provide customizable designs to match a desired aerosol chemical delivery profile.

[0076] Example 1 - Experiment

[0077] According to the utility model, as reference Figure 1 The illustrated filter having a length of 33 mm is attached to a reconstituted tobacco plugging piece by methods known in the art to provide an HNB product or HTP for testing, the filter comprising a first longitudinally extending core (FM26 paper) having a length of 10 mm, a second longitudinally extending core (ZNP paper) having a length of 18 mm, and a cavity having a length of 5 mm between the first longitudinally extending core and the second longitudinally extending core. The HNB product or HTP is referred to as test example SAM111426-10-150 (abbreviated as SAM426-10-150).

[0078] Similarly, a second filter with a length of 33 mm according to the present invention is attached to a reconstituted tobacco plugging piece by a method known in the art to provide an HNB product or HTP for testing, the second filter comprising a first longitudinally extending core (FM26 paper) with a length of 8 mm, a second longitudinally extending core (ZNP paper) with a length of 18 mm, and a cavity with a length of 7 mm between the first longitudinally extending core and the second longitudinally extending core. The HNB product or HTP is referred to as test example SAM111426-8-150 (abbreviated as SAM426-8-150).

[0079] A third filter with a length of 33 mm according to the utility model is attached to a reconstituted tobacco plugging piece by a method known in the art to provide an HNB product or HTP for testing, the third filter comprising a first longitudinally extending core (FM26 paper) with a length of 6 mm, a second longitudinally extending core (ZNP paper) with a length of 18 mm, and a cavity with a length of 9 mm between the first longitudinally extending core and the second longitudinally extending core. The HNB product or HTP is referred to as test example SAM111426-6-150 (abbreviated as SAM426-6-150).

[0080] The reference product Amber HEETS includes a reconstituted tobacco plug and a 3 mm long filter, which includes a hollow acetate tube (tobacco end) with a length of 7 mm, a PLA cooling element referred to herein as a "conventional cooling element" with a length of 18 mm, and a mouth end cylindrical plug of cellulose acetate tow with a length of 8 mm, which is arranged in the same manner as the filter. Figure 1 The arrangement shown in is similar.

[0081] The HNB test examples SAM111426-10-150, SAM111426-8-150 and SAM111426-6-150 are compared with the reference product Amber HEETS as follows:

[0082] Each product was inserted into a heating device. The mouth end of the product was inserted into a smoking machine configured to draw smoke on the product. When the product was being drawn smoke, an infrared (IR) camera was used to analyze the temperature at the mouth end of the product. The smoking machine was configured to draw smoke on the product every 30 seconds, with each draw being 2 seconds long. The temperature at the mouth end of the product was measured for each draw. The experiment was conducted at standard room temperature and humidity. The experiment was repeated for each example product, namely SAM111426-10-150, SAM111426-8-150, SAM111426-6-150, and the reference product Amber HEETS.

[0083] Figure 3 1 is a graphical representation of how the temperature at the mouth end of HNB products / HTPs (examples SAM111426-10-150, SAM111426-8-150 and SAM111426-6-150) and the reference product Amber HEETS varies with the puffs taken for filters and filter elements according to the present invention. The figures show that the paper-based filter of the present invention is able to provide a cooling effect comparable to conventional cooling elements while providing the great benefit of being easily biodegradable.

[0084] Temperature variation, nicotine mass yield and aerosol collection mass yield of products SAM111426-10-150 and SAM111426-6-150 (each including a filter according to the present invention) and reference product Amber HEETS measured by methods known in the art (ISO 3308:2012 Routine analytical cigarette-smoking machine-Definitions and standard conditions). The results are shown in Table 1.

[0085] Table 1

[0086]

[0087] *This temperature is higher than the reference product temperature, but is acceptable because it is less than 5% higher than the reference product temperature.

[0088] Table 1 (and Figure 3 ) shows that the filters and elements according to the present invention can provide comparable thermal distribution and / or comparable aerosol chemical delivery performance to conventional cooling elements (reference products), while also providing improved biodegradability (because the filters and elements do not contain, for example, PLA elements).

Claims

1. A filter for use in an aerosol-generating article, the filter comprising: a first longitudinally extending core comprising a first filter material; a second longitudinally extending core comprising a second filter material, wherein the second longitudinally extending core has a pressure drop of 0.1 mmWG to 1 mmWG per millimeter of length; and a wrapper joined about the first longitudinally extending core and the second longitudinally extending core; Characterized in that each of the first filter material and the second filter material comprises paper and / or a biodegradable material other than paper; And wherein said second longitudinally extending core is formed of paper and / or a biodegradable material other than paper which is gathered laterally into a stick form and held in place.

2. The filter according to claim 1, characterized in that The second longitudinally extending core has a cooling effect on the aerosol drawn through the second longitudinally extending core.

3. The filter according to claim 1 or 2, characterized in that: The first longitudinally extending core is longitudinally spaced apart from the second longitudinally extending core such that the wrapper defines a cavity between the first longitudinally extending core and the second longitudinally extending core.

4. The filter according to claim 1 or 2, characterized in that: The second longitudinally extending core is formed of paper and / or a biodegradable material other than paper, the width of the paper and / or the biodegradable material other than paper being 20 mm to 350 mm, the paper and / or the biodegradable material other than paper being gathered laterally into a rod form and held in place.

5. The filter according to claim 1 or 2, characterized in that: Each of the first filter material and the second filter material includes readily biodegradable paper and / or a biodegradable material other than paper.

6. The filter according to claim 1 or 2, characterized in that: The filter is cylindrical in shape, wherein the circumference is 12 mm to 30 mm.

7. The filter according to claim 1 or 2, characterized in that: The length of the filter is 18 mm to 60 mm.

8. The filter according to claim 1 or 2, characterized in that: The length of the first longitudinally extending core is 3 mm to 18 mm.

9. The filter according to claim 1 or 2, characterized in that: The second longitudinally extending core has a length of 7 mm to 30 mm.

10. The filter according to claim 1 or 2, characterized in that: The filter comprises a cavity between the first longitudinally extending core portion and the second longitudinally extending core portion, the cavity having a length of 3 mm to 18 mm.

11. The filter according to claim 1, characterized in that The second longitudinally extending core has a pressure drop of 0.31 mmWG to 0.7 mmWG per millimeter of length.

12. The filter according to claim 1, characterized in that The second longitudinally extending core has a pressure drop of 0.5 mmWG to 0.6 mmWG per millimeter of length.

13. The filter according to claim 1, characterized in that The second longitudinally extending core has a pressure drop of 0.55 mmWG per millimeter of length.

14. The filter according to claim 1, characterized in that The paper and / or the biodegradable material other than paper is held in place by the wrapper.

15. The filter according to claim 4, characterized in that The paper and / or the biodegradable material other than paper has a width of 200 mm to 350 mm.

16. The filter according to claim 4, characterized in that The paper and / or the biodegradable material other than paper has a width of 250 mm to 350 mm.

17. The filter according to claim 4, characterized in that The width of the paper and / or the biodegradable material other than paper is 251 mm to 350 mm.

18. The filter according to claim 4, characterized in that The paper and / or the biodegradable material other than paper has a width of 280 mm to 320 mm.

19. The filter according to claim 4, characterized in that The width of the paper and / or the biodegradable material other than paper is 300 mm.

20. The filter according to claim 4, characterized in that The paper and / or the biodegradable material other than paper is held in place by the wrapper.

21. The filter according to claim 6, characterized in that The filter has a circumference of 15 mm to 28 mm.

22. The filter according to claim 6, characterized in that The filter has a circumference of 17 mm to 25 mm.

23. The filter according to claim 6, characterized in that The filter has a circumference of 18 mm to 25 mm.

24. The filter according to claim 6, characterized in that The filter has a circumference of 20 mm to 24 mm.

25. The filter according to claim 6, characterized in that The filter has a circumference of 22 mm to 24 mm.

26. The filter according to claim 6, characterized in that The circumference of the filter is 23 mm.

27. The filter according to claim 6, characterized in that The circumference of the filter is 22 mm.

28. The filter according to claim 6, characterized in that The circumference of the filter is 22.45 mm.

29. The filter according to claim 7, characterized in that The length of the filter is 30 mm to 35 mm.

30. The filter according to claim 7, characterized in that The length of the filter is 33 mm.

31. The filter according to claim 8, characterized in that The length of the first longitudinally extending core is 3 mm to 11 mm.

32. The filter according to claim 8, characterized in that The length of the first longitudinally extending core is 6 mm to 10 mm.

33. The filter according to claim 9, characterized in that The second longitudinally extending core has a length of 17 mm to 25 mm.

34. The filter according to claim 9, characterized in that The second longitudinally extending core has a length of 18 mm to 24 mm.

35. The filter according to claim 10, characterized in that The length of the cavity is 4 mm to 10 mm.

36. The filter according to claim 10, characterized in that The length of the cavity is 5 mm to 9 mm.

37. A filter element comprising a longitudinally extending core having a pressure drop of 0.1 mmWG to 1 mmWG per millimeter of length; the longitudinally extending core comprising a filter material having paper and / or a biodegradable material other than paper and a wrapper joined around the longitudinally extending core; characterized in that The longitudinally extending core is formed of paper and / or a biodegradable material other than paper which is gathered laterally into a rod form and held in place by the wrapper.

38. The filter element according to claim 37, characterized in that The longitudinally extending core is formed of paper and / or a biodegradable material other than paper, the width of the paper and / or the biodegradable material other than paper being 20 mm to 350 mm, the paper and / or the biodegradable material other than paper being gathered laterally into a rod form and held in place.

39. The filter element of claim 37, wherein: The longitudinally extending core has a pressure drop of 0.31 mmWG to 0.7 mmWG per millimeter of length.

40. The filter element of claim 37, wherein: The longitudinally extending core has a pressure drop of 0.5 mmWG to 0.6 mmWG per millimeter of length.

41. The filter element of claim 37, wherein: The longitudinally extending core has a pressure drop of 0.53 mmWG to 0.57 mmWG per millimeter of length.

42. The filter element of claim 37, wherein: The longitudinally extending core has a pressure drop of 0.55 mmWG per millimeter of length.

43. The filter element of claim 37, wherein: The longitudinally extending core is generally cylindrical.

44. The filter element of claim 37, wherein: The biodegradable material other than paper is a material that does not contain cellulose acetate.

45. The filter element of claim 38, wherein: The paper and / or the biodegradable material other than paper has a width of 200 mm to 350 mm.

46. ​​The filter element of claim 38, wherein: The paper and / or the biodegradable material other than paper has a width of 250 mm to 350 mm.

47. The filter element of claim 38, wherein: The width of the paper and / or the biodegradable material other than paper is 251 mm to 350 mm.

48. The filter element of claim 38, wherein: The paper and / or the biodegradable material other than paper has a width of 280 mm to 320 mm.

49. The filter element of claim 38, wherein The width of the paper and / or the biodegradable material other than paper is 300 mm.

50. The filter element of claim 38, wherein: The paper and / or the biodegradable material other than paper is held in place by the wrapper.

51. An aerosol generating product, characterized in that A filter comprising a filter according to any one of claims 1 to 36 or having a filter element according to any one of claims 37 to 50.

52. An aerosol-generating article according to claim 51 , characterised in that The aerosol-generating article further comprises one or more discrete further sections.

53. A tobacco heating product, characterized in that: A filter comprising a filter according to any one of claims 1 to 36 or having a filter element according to any one of claims 37 to 50.

54. The tobacco heating product according to claim 53, characterized in that The tobacco heating product is a heat-not-burn product or a heated tobacco product.

55. The tobacco heating product of claim 53, wherein: The tobacco heating product may also include one or more separate further sections.

56. A filter for use in an aerosol-generating article, the filter comprising: a first longitudinally extending core comprising a first filter material; a second longitudinally extending core comprising a second filter material, wherein the second longitudinally extending core has a pressure drop of 0.1 mmWG to 1 mmWG per millimeter of length; and a wrapper joined about the first longitudinally extending core and the second longitudinally extending core; Characterized in that each of the first filter material and the second filter material comprises paper and / or a biodegradable material other than paper.

57. The filter according to claim 56, characterized in that The second longitudinally extending core has a pressure drop of 0.31 mmWG to 0.7 mmWG per millimeter of length.

58. The filter according to claim 56, characterized in that The second longitudinally extending core has a pressure drop of 0.5 mmWG to 0.6 mmWG per millimeter of length.

59. The filter according to claim 56, characterized in that The second longitudinally extending core has a pressure drop of 0.55 mmWG per millimeter of length.

60. A filter element, characterized in that The invention comprises a longitudinally extending core having a pressure drop of 0.1 mmWG to 1 mmWG per millimeter of length; the longitudinally extending core comprises a filter material having paper and / or a biodegradable material other than paper.

61. The filter element of claim 60, wherein: The longitudinally extending core has a pressure drop of 0.31 mmWG to 0.7 mmWG per millimeter of length.

62. The filter element of claim 60, wherein: The longitudinally extending core has a pressure drop of 0.5 mmWG to 0.6 mmWG per millimeter of length.

63. The filter element of claim 60, wherein: The longitudinally extending core has a pressure drop of 0.53 mmWG to 0.57 mmWG per millimeter of length.

64. The filter element of claim 60, wherein: The longitudinally extending core has a pressure drop of 0.55 mmWG per millimeter of length.

65. The filter element of claim 60, wherein: The longitudinally extending core is generally cylindrical.

66. The filter element of claim 60, wherein: The biodegradable material other than paper is a material that does not contain cellulose acetate.

67. The filter element of claim 60, wherein: The longitudinally extending core also includes a wrapper engaged about the longitudinally extending core.

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