WO2024100084A1 - Filtre durable et élément filtre - Google Patents

Filtre durable et élément filtre Download PDF

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Publication number
WO2024100084A1
WO2024100084A1 PCT/EP2023/081083 EP2023081083W WO2024100084A1 WO 2024100084 A1 WO2024100084 A1 WO 2024100084A1 EP 2023081083 W EP2023081083 W EP 2023081083W WO 2024100084 A1 WO2024100084 A1 WO 2024100084A1
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WO
WIPO (PCT)
Prior art keywords
longitudinally extending
paper
length
filter
core
Prior art date
Application number
PCT/EP2023/081083
Other languages
English (en)
Inventor
Boby ALEXANDER
Arief RAHMAN
Agus FAHRONI
Giyanto
Moch Anis FAUZI
Original Assignee
Filtrona Development Co. Pte. Ltd.
Filtrona Filters Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Filtrona Development Co. Pte. Ltd., Filtrona Filters Limited filed Critical Filtrona Development Co. Pte. Ltd.
Publication of WO2024100084A1 publication Critical patent/WO2024100084A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D1/00—Cigars; Cigarettes
    • A24D1/20—Cigarettes specially adapted for simulated smoking devices
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/04—Tobacco smoke filters characterised by their shape or structure
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/067—Use of materials for tobacco smoke filters characterised by functional properties
    • A24D3/068—Biodegradable or disintegrable
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/08—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent
    • A24D3/10—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent of cellulose or cellulose derivatives

Definitions

  • the present invention provides a sustainable filter and filter element for use with an aerosol generating article such as a tobacco heating product, a heat-not-burn (HNB) product or heated tobacco product (HTP).
  • an aerosol generating article such as a tobacco heating product, a heat-not-burn (HNB) product or heated tobacco product (HTP).
  • HNB heat-not-burn
  • HTP heated tobacco product
  • HNB heat-not-burn
  • HTP heated tobacco product
  • Tobacco heating products may include a plug of modified tobacco and other mouthpiece elements which are wrapped in a paper plugwrap so as to provide a cigarette-like appearance.
  • a reconstituted tobacco plug a wrapped hollow acetate tube, a wrapped plug of PLA [poly(lactic acid)] and a conventional wrapped acetate segment (at the mouth end) are wrapped in a white paper.
  • the product is inserted, tobacco end first, into a device which has a heating element in the form of a heating blade, such that when the product is pushed into the device the heating blade enters into the tobacco plug.
  • the heating blade heats the tobacco so the product can then be “smoked” by the consumer who puffs 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 functions are to provide the look and feel of a cigarette and also to cool the vapour down to an acceptable temperature for the consumer.
  • the PLA section that performs the significant cooling function and so it may be considered a cooling element.
  • a filter for use in an aerosol generating article (e.g., a tobacco heated product and/or HNB product or HTP), the filter comprising: a first longitudinally extending (e.g., cylindrical) core comprising a first filtering material; a second longitudinally extending (e.g., cylindrical) core comprising a second filtering material (e.g. paper, e.g.
  • the second longitudinally extending core has a pressure drop of from 0.1 to 1 mmWG per mm of its length, for example 0.31 to 0.7 mmWG per mm of its length, for example from 0.5 to 0.6 mmWG per mm of its length; and a wrapper (e.g. filter wrapper) engaged around the first and second longitudinally extending cores; wherein each of the first and second filtering materials comprise a paper and/or other biodegradable material (e.g. non-cellulose acetate containing material).
  • biodegradable material e.g. non-cellulose acetate containing material
  • the second longitudinally extending core has a pressure drop of from 0.1 to 1 mmWG per mm of its length, for example 0.31 to 0.7 mmWG per mm of its length, for example from 0.5 to 0.6 mmWG per mm of its length, for example a pressure drop of from 0.53 to 0.57 mmWG per mm of its length, for example a pressure drop of 0.55 mmWG per mm of its length.
  • the second longitudinally extending core has a pressure drop of from 0.5 to 0.6 mmWG per mm of its length, for example a pressure drop of from 0.53 to 0.57 mmWG per mm of its length, for example a pressure drop of 0.55 mmWG per mm of its length.
  • the first longitudinally extending core is distanced longitudinally from the second longitudinally extending core such that the wrapper defines a cavity between the first and second longitudinally extending cores.
  • the second longitudinally extending core has a cooling effect (e.g. on aerosol drawn through the core second longitudinally extending core and/or the filter).
  • the first longitudinally extending core may be formed from a 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 rod form and held in place (e.g. by a wrapper, e.g. by a first core wrapper).
  • the first longitudinally extending core may be formed from a paper (e.g. uncoated paper, coated paper, siliconized paper, e.g.
  • Puracel FM26, Puracel FM36 and/or Greenbutts and/or other biodegradable material of width 20 mm to 350 mm, for example of width 200 mm to 350 mm, for example of width 250 to 350 mm, for example 251 to 350 mm, for example 280 to 320 mm, for example 300 mm, which is gathered laterally into rod form and held in place (e.g. by a wrapper, e.g. by a first core wrapper).
  • the first longitudinally extending core may have a wrapper (e.g. first core wrapper) which holds the filtering material in shape (e.g. in core form, e.g. in rod or plug form). This wrapper (e.g.
  • first core wrapper is e.g. separate from the wrapper (e.g. filter wrapper) which is engaged around the first and second longitudinally extending cores. If there is a wrapper (e.g. first core wrapper) for the first longitudinally extending core, it will be appreciated that the wrapper (e.g. filter wrapper) engaged around the first and second longitudinally extending cores is wrapped around the wrapper (e.g. first core wrapper) of the first longitudinally extending core as well as the first longitudinally extending core itself.
  • wrapper e.g. filter wrapper
  • the second longitudinally extending core may be formed from a paper (e.g. uncoated paper, coated paper, siliconized paper, e.g. ZNP paper) and/or other biodegradable material which is gathered laterally into 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 from a paper (e.g. uncoated paper, coated paper, siliconized paper, e.g.
  • the second longitudinally extending core has a pressure drop of from 0.5 to 0.6 mmWG per mm of its length, for example a pressure drop of from 0.53 to 0.57 mmWG per mm of its length, for example a pressure drop of 0.55 mmWG per mm of its length.
  • the density of a second longitudinally extending core which has a pressure drop of from 0.5 to 0.6 mmWG per mm of its length and is formed from 300 mm wide paper will be 0.269 g/cm 3
  • the density of the second longitudinally extending core is from 0.215 g/cm 3 to 0.33 g/cm 3 , for example 0.22 g/cm 3 to 0.31 g/cm 3 , for example 0.24 g/cm 3 to 0.30 g/cm 3 , for example 0.25 g/cm 3 to 0.29 g/cm 3 , for example 0.26 g/cm 3 to 0.275 g/cm 3 , for example 0.269 g/cm 3 .
  • the second longitudinally extending core may have a wrapper (e.g. second core wrapper) which holds the filtering material in shape (e.g. in core form, e.g. in rod or plug form).
  • This wrapper e.g. second core wrapper
  • This wrapper is e.g. separate from the wrapper (e.g. filter wrapper) which is engaged around the first and second longitudinally extending cores.
  • the wrapper e.g. filter wrapper
  • the wrapper e.g. filter wrapper
  • the wrapper engaged around the first and second longitudinally extending cores is wrapped around the wrapper (e.g. second core wrapper) of the second longitudinally extending core as well as the second longitudinally extending core itself.
  • the filter may further comprise a third longitudinally extending core.
  • the third longitudinally extending core comprises a third filtering material (e.g. paper, e.g. uncoated paper, coated paper, siliconized paper, e.g. ZNP paper), wherein the third longitudinally extending core has a pressure drop of from 0.5 to 0.6 mmWG per mm of its length.
  • the third longitudinally extending core comprises a paper and/or other biodegradable material (e.g. non-cellulose acetate containing material). If a third longitudinally extending core is present, the wrapper (e.g. filter wrapper) is engaged around the first and second and third longitudinally extending cores.
  • the third longitudinally extending core has a pressure drop of from 0.1 to 1 mmWG per mm of its length, for example 0.31 to 0.7 mmWG per mm of its length, for example from 0.5 to 0.6 mmWG per mm of its length, for example a pressure drop of from 0.53 to 0.57 mmWG per mm of its length, for example a pressure drop of 0.55 mmWG per mm of its length.
  • the third longitudinally extending core has a pressure drop of from 0.5 to 0.6 mmWG per mm of its length, for example a pressure drop of from 0.53 to 0.57 mmWG per mm of its length, for example a pressure drop of 0.55 mmWG per mm of its length.
  • the third longitudinally extending core may, for example, be positioned between the first longitudinally extending core and the second longitudinally extending core.
  • the third longitudinally extending core may be formed from a paper (e.g. uncoated paper, coated paper, siliconized paper, e.g. ZNP paper) and/or other biodegradable material which is gathered laterally into rod form and held in place (e.g. by a wrapper, e.g. a third core wrapper).
  • the third longitudinally extending core may be formed from a paper (e.g. uncoated paper, coated paper, siliconized paper, e.g.
  • the third longitudinally extending core may have a wrapper (e.g. third core wrapper) which holds the filtering material in shape (e.g. in core form, e.g. in rod or plug form).
  • This wrapper e.g. third core wrapper
  • This wrapper is e.g. separate from the wrapper (e.g. filter wrapper) which is engaged around the first and second (and third) longitudinally extending cores.
  • wrapper e.g. third core wrapper
  • the wrapper e.g. filter wrapper
  • the wrapper engaged around the first and second (and third) longitudinally extending cores is wrapped around the wrapper (e.g. third core wrapper) of the third longitudinally extending core as well as the third longitudinally extending core itself.
  • filters according to aspects the invention combine biodegradilbility (are “readily biodegradeable”) with a comparable thermal profile and/or comparable Aerosol Chemistry Delivery to the product in the market which uses cellulose acetate and PLA. Further the applicants have found the filters of the invention are adaptable to provide a customizable design to match a desired aerosol chemistry delivery profile.
  • the first filtering material may comprise a paper and/or other biodegradable material which is readily biodegradable.
  • the second filtering material may comprise a paper and/or other biodegradable material which is readily biodegradable.
  • each of the first and second filtering materials comprise a paper and/or other biodegradable material which is readily biodegradable.
  • biodegradable refers to the filtering material and filter being able to exhibit a biodegradation of at least 90% after 6 months under controlled composting conditions (see ISO14855-1 Determination of the ultimate aerobic biodegradability of plastic materials under controlled composting conditions - Method by analysis of evolved carbon dioxide).
  • the paper and/or other biodegradable material used in the filtering material(s) of the filter of the present invention is “readily biodegradable” and has an enhanced biodegradability compared to cellulose acetate. Therefore, the present invention provides a filter of enhanced biodegradability, and thus is more environmentally friendly and is more in line with Ell legislation.
  • readily biodegradable refers to the filtering material and filter being able to disintegrate rapidly and completely biodegrade when immersed in water.
  • the filter (and filtering materials used therein) has the ‘Ready Biodegradability’ level of biodegradability as measured according to OECD 301 B ‘Ready Biodegradability’ method (modified Sturm test), which is well known in the art.
  • the phase “readily biodegradable” will here be understood to mean ‘Ready Biodegradability’ level of biodegradability.
  • the paper and/or other biodegradable material is preferably readily biodegradable.
  • the paper and/or other biodegradable material e.g. non-cellulose acetate containing filtering material
  • the paper and/or other biodegradable material may be comprised of any paper (in any form) which is conventionally used in filters or filter elements.
  • the paper may be, for example, filtering paper, aperture paper, crepe paper, air-laid paper or machine glazed paper etc. of varying grades.
  • the fibre of the paper and/or other biodegradable material e.g. non- cellulose acetate containing filtering material
  • the paper may be woven or non-woven, or in the form of a coherent web of paper, or a longitudinally corrugated and/or fibrillated web of paper e.g. gathered laterally into, and held, in plug form.
  • the paper and/or other biodegradable material e.g. non- cellulose acetate containing filtering material
  • non-cellulose acetate containing filtering material and a second paper and/or other biodegradable material (e.g. non-cellulose acetate containing filtering material).
  • the paper and/or other biodegradable material may be in the form of a blend of different paper materials and/or other biodegradable materials (e.g. non-cellulose acetate containing filtering materials).
  • the paper filtering material may have the same or a similar structure to those papers sold under the trademark Myria® or Puracel® (of Essentra pic).
  • the first filtering material may comprise a paper and/or other biodegradable material which is readily biodegradable.
  • the first filtering material may comprise a paper and/or other biodegradable material as set out in the paragraph above.
  • the first filtering material comprises Puracel FM26, Puracel FM36 and/or Greenbutts.
  • the second filtering material may comprise a paper and/or other biodegradable material which is readily biodegradable.
  • the second filtering material may comprise a paper and/or other biodegradable material as described above.
  • the second filtering material comprises Uncoated Paper, Coated Paper and/or Siliconized Paper.
  • the third filtering material may comprise a paper and/or other biodegradable material which is readily biodegradable.
  • the third filtering material may comprise a paper and/or other biodegradable material as described above.
  • the third filtering material comprises Uncoated Paper, Coated Paper and/or Siliconized Paper.
  • the first filtering material comprises a paper having a basis weight from 20 gsm to 200 gsm.
  • the first filtering material may be a paper having a basis weight from 40 gsm to 180 gsm, e.g. from 60 gsm to 160 gsm, e.g. from 80 gsm to 140 gsm, e.g. from 100 gsm to 120 gsm, e.g. from 20 gsm to 60 gsm, e.g. from 30 gsm to 40 gsm.
  • the second filtering material comprises a paper having a basis weight from 20 gsm to 200 gsm.
  • the second filtering material may be a paper having a basis weight from 40 gsm to 180 gsm, e.g. from 60 gsm to 160 gsm, e.g. from 80 gsm to 140 gsm, e.g. from 100 gsm to 120 gsm, e.g. from 20 gsm to 60 gsm, e.g. from 30 gsm to 40 gsm.
  • the third filtering material comprises a paper having a basis weight from 20 gsm to 200 gsm.
  • the third filtering material may be a paper having a basis weight from 40 gsm to 180 gsm, e.g. from 60 gsm to 160 gsm, e.g. from 80 gsm to 140 gsm, e.g. from 100 gsm to 120 gsm, e.g. from 20 gsm to 60 gsm, e.g. from 30 gsm to 40 gsm.
  • the filter of the invention may be cylindrical.
  • the filter of the invention may be cylindrical with circumference from 12 to 30 mm (e.g., 15 to 28 mm), more preferably from 17 to 25 mm, (e.g., 18 to 25 mm, e.g., 20 to 24 mm, e.g., 22 to 24 mm, e.g., 23 mm, e.g., 22 mm, e.g. 22.45 mm).
  • the wrapper (e.g. filter wrapper) engaged around the first and second (and optionally, third) longitudinally extending cores may be a paper (e.g., plugwrap), preferably a paper (e.g., plugwrap) of basis weight 20 to 160 gsm, for example a paper (e.g., plugwrap) of basis weight 24 to 150 gsm, for example a paper (e.g., plugwrap) of basis weight 70 to 150 gsm, for example a paper (e.g., plugwrap) of basis weight 70 to 140 gsm.
  • the wrapper (e.g. filter wrapper) engaged around the first and second (and optionally, third) longitudinally extending cores is biodegradable, more preferably readily biodegradable.
  • the wrapper for the first longitudinally extending core (e.g. first core wrapper), if present, and/or the wrapper for the second longitudinally extending core (e.g. second core wrapper), if present, may be a paper (e.g., plugwrap).
  • the paper may be a paper (e.g., plugwrap) of basis weight 20 to 160 gsm, for example a paper (e.g., plugwrap) of basis weight 24 to 150 gsm, for example a paper (e.g., plugwrap) of basis weight 70 to 150 gsm, for example a paper (e.g., plugwrap) of basis weight 70 to 140 gsm.
  • the wrapper for the first longitudinally extending core e.g. first core wrapper
  • the wrapper for the second longitudinally extending core e.g. second core wrapper
  • the wrapper for the first longitudinally extending core (e.g. first core wrapper) and the wrapper for the second longitudinally extending core may be made from the same material or from different materials.
  • the wrapper for the third longitudinally extending core may be a paper (e.g., plugwrap).
  • the paper may be a paper (e.g., plugwrap) of basis weight 20 to 160 gsm, for example a paper (e.g., plugwrap) of basis weight 24 to 150 gsm, for example a paper (e.g., plugwrap) of basis weight 70 to 150 gsm, for example a paper (e.g., plugwrap) of basis weight 70 to 140 gsm.
  • the wrapper for the third longitudinally extending core e.g. third core wrapper
  • the wrapper for the third longitudinally extending core is biodegradable, more preferably readily biodegradable.
  • the filter of the invention may be of length 18 mm to 60mm, for example 20 to 50 mm (e.g., from 20 to 35mm).
  • the filter of the invention is of length 30 to 35 mm, for example 31 mm to 34 mm, for example 33 mm.
  • the first longitudinally extending core may be of length 3 to 18mm, for example of length 3 to 11 mm, for example 6 to 10 mm, for example 6, 7, 8, 9 or 10 mm.
  • the second longitudinally extending core may be of length 7 to 30 mm, for example 17 to 25 mm, for example 18 to 24mm, for example, 18, 19, 20, 21 , 22, 23 or 24 mm.
  • the third longitudinally extending core may be of length 3 to 18mm, for example of length 3 to 11 mm, for example 6 to 10 mm, for example 6, 7, 8, 9 or 10 mm.
  • the cavity between the first and second longitudinally extending cores may be of length 4 to 10 mm, for example 5 to 9 mm, for example 5, 6, 7, 8 or 9 mm.
  • the filter has pressure drop (longitudinally along the length of the whole filter) of 10 to 50 mmWG, for example 23 to 35 mmWG, for example 24 to 31 mmWG, for example 28 to 31 mm WG.
  • the filter of the invention is of length 33 mm and comprises a first longitudinally extending core of length 10 mm; a second longitudinally extending core of length 18 mm; and a cavity between the first and second longitudinally extending cores of length 5 mm. This example is illustrated in attached Figure 1.
  • the filter of the invention is of length 33 mm and comprises a first longitudinally extending core of length 8 mm; a second longitudinally extending core of length 18 mm; and a cavity between the first and second longitudinally extending cores of length 7 mm.
  • the filter of the invention is of length 33 mm and comprises a first longitudinally extending core of length 6 mm; a second longitudinally extending core of length 18 mm; and a cavity between the first and second longitudinally extending cores of length 9 mm.
  • the filter of the invention is of length 33 mm and comprises a first longitudinally extending core of length 9 mm abutted to a second longitudinally extending core of length 24 mm. In this example there is no cavity between the first and second longitudinally extending cores.
  • This example is illustrated in attached Figure 2.
  • the filter of the invention is of length 33 mm and comprises a first longitudinally extending core of length 8 mm; a second longitudinally extending core of length 18 mm; and a third longitudinally extending core of length 7mm between the first and second longitudinally extending cores. In this example there is no cavity between the first and second longitudinally extending cores.
  • the paper and/or other biodegradable material (e.g. non-cellulose acetate containing filtering material) of the first and/or second longitudinally extending cores may be coated with a hydrophobic coating or hydrophobic material.
  • a hydrophobic coating or hydrophobic material e.g. water vapour within the element (e.g. cooling element) to condense within the element (e.g. cooling element) which provides the beneficial effect of cooling the vapour as it passes through the element.
  • the hydrophobic material is distributed throughout the longitudinally extending (e.g., cylindrical) core(s). The applicants have found that this provides an optimal level of vapour cooling and filtration for use in a tobacco heating product or HNB product.
  • the hydrophobic coati ng/material may be any suitable hydrophobic material.
  • the hydrophobic coating/material may a polymer or a blend of polymers.
  • the hydrophobic coating/material is a starch, such as a modified starch, for example oxidized starch (E1404).
  • a starch such as a modified starch is preferred as it is inert and provides a non-plastic hydrophobic coating.
  • the hydrophobic coating/material may be present in an amount from 0.01 % to 50 % weight of hydrophobic coating/material with respect to weight of the relevant longitudinally extending core (w/w), for example 0.01 % to 20 % w/w, for example 0.1 % to 20% w/w, for example 5% to 20% w/w, for example 10% to 20% w/w, for example 0.1 % to 10% w/w, for example 0.1 % to 5 % w/w, for example 0.5% to 2.5% w/w.
  • the hydrophobic coating can be applied to the paper and/or other biodegradable material (e.g. non-cellulose acetate containing filtering material) of the first and/or second longitudinally extending cores via any of the standard coating methods known in the art.
  • the filter has a substantially circular cross section meaning the element is substantially cylindrical in shape.
  • the filter of the present invention may be any shape.
  • the filter may have an annular cross section or an oval cross section or a square cross section or a rectangular cross section.
  • the filter of the invention may be used in any multi-segment filter or consumable.
  • the multi-segment filter may comprise one, two, three, four or more additional discrete segments.
  • the additional discrete further segments may be (e.g., cylindrical) plugs of tobacco smoke filtering material (e.g., paper) and/or a hollow (e.g., paper) tube filter.
  • the multi-segment filter may be attached to a tobacco plug (which can be made from any form of tobacco (including reconstituted)).
  • the multi-segment filter may include other filter segments that include capsule containing filters, carbon containing filters, CPS filters, tube filters, paper filters, menthol containing filters etc.
  • a filter element comprising a longitudinally extending (e.g. substantially cylindrical) core having a pressure drop of from 0.1 to 1 mmWG per mm of its length, for example 0.31 to 0.7 mmWG per mm of its length, for example from 0.5 to 0.6 mmWG per mm of its length (for example a pressure drop of from 0.53 to 0.57 mmWG per mm of its length, for example a pressure drop of 0.55 mmWG per mm of its length); the longitudinally extending (e.g.
  • substantially cylindrical core comprising a filtering material comprising a paper and/or other biodegradable material (e.g. non-cellulose acetate containing material).
  • the filter element may have a wrapper (e.g. a core wrapper), e.g. a paper wrapper, e.g. a paper wrapper which is biodegradable and/or readily biodegradeable, engaged around the longitudinally extending core.
  • the longitudinally extending core may be formed from a paper (e.g. uncoated paper, coated paper, siliconized paper, e.g. ZNP paper) and/or other biodegradable material which is gathered laterally into rod form and held in place (e.g. by the wrapper, e.g. core wrapper).
  • the longitudinally extending core may be formed from a paper (e.g. uncoated paper, coated paper, siliconized paper, e.g. ZNP paper) and/or other biodegradable material of width 250 to 350 mm, for example 251 to 350 mm, for example 280 to 320 mm, for example 300 mm, which is gathered laterally into rod form and held in place (e.g. by the wrapper, e.g. core wrapper).
  • the longitudinally extending e.g.
  • substantially cylindrical core has a pressure drop of from 0.5 to 0.6 mmWG per mm of its length, for example a pressure drop of from 0.53 to 0.57 mmWG per mm of its length, for example a pressure drop of 0.55 mmWG per mm of its length.
  • the longitudinally extending e.g.
  • substantially cylindrical core has a density of from rom 0.215 g/cm 3 to 0.33 g/cm 3 , for example 0.22 g/cm 3 to 0.31 g/cm 3 , for example 0.24 g/cm 3 to 0.30 g/cm 3 , for example 0.25 g/cm 3 to 0.29 g/cm 3 , for example 0.26 g/cm 3 to 0.275 g/cm 3 , for example 0.269 g/cm 3 . .
  • the filter element has a cooling effect (e.g. on aerosol drawn through the longitudinally extending core and/or any filter including the filter element).
  • element or “filter element” as used herein refers to any discrete segment that can be used in a filter or aerosol generating article.
  • the element may be a cooling element.
  • cooling element refers to a discrete segment which provides a significant cooling function i.e., lowering the temperature of aerosol or vapour as it passes along the length of the element.
  • biodegradable refers to the filtering material and filter element being able to exhibit a biodegradation of at least 90% after 6 months under controlled composting conditions (see ISO14855-1 Determination of the ultimate aerobic biodegradability of plastic materials under controlled composting conditions - Method by analysis of evolved carbon dioxide).
  • the paper and/or other biodegradable material e.g. non-cellulose acetate containing material
  • the present invention provides a filter element of enhanced biodegradability, and thus is more environmentally friendly and is more in line with Ell legislation.
  • readily biodegradable refers to the filtering material and element being able to disintegrate rapidly and completely biodegrade when immersed in water.
  • the element has the ‘Ready Biodegradability’ level of biodegradability as measured according to OECD 301 B ‘Ready Biodegradability’ method (modified Sturm test), which is well known in the art.
  • the phase “readily biodegradable” will here be understood to mean ‘Ready Biodegradability’ level of biodegradability.
  • the paper and/or other biodegradable material is preferably readily biodegradable.
  • the paper and/or other biodegradable material e.g. non-cellulose acetate containing filtering material
  • the paper and/or other biodegradable material may be comprised of any paper (in any form) which is conventionally used in filters or filter elements.
  • the paper may be, for example, filtering paper, aperture paper, crepe paper, air-laid paper or machine glazed paper etc. of varying grades.
  • the fibre of the paper and/or other biodegradable material e.g. non- cellulose acetate containing filtering material
  • the paper may be woven or non-woven, or in the form of a coherent web of paper, or a longitudinally corrugated and/or fibrillated web of paper e.g. gathered laterally into, and held, in plug form.
  • the paper and/or other biodegradable material e.g. non- cellulose acetate containing filtering material
  • non-cellulose acetate containing filtering material and a second paper and/or other biodegradable material (e.g. non-cellulose acetate containing filtering material).
  • the paper and/or other biodegradable material may be in the form of a blend of different paper materials and/or other biodegradable materials (e.g. non-cellulose acetate containing filtering materials).
  • the paper filtering material may have the same or a similar structure to those papers sold under the trademark Myria® or Puracel® (of Essentra pic).
  • the filtering material may comprise a paper and/or other biodegradable material which is readily biodegradable.
  • the filtering material may comprise a paper and/or other biodegradable material described above.
  • the filtering material comprises Uncoated Paper, Coated Paper and/or Siliconized Paper.
  • the filtering material comprises a paper having a basis weight from 20 gsm to 200 gsm.
  • the filtering material may be a paper having a basis weight from 40 gsm to 180 gsm, e.g. from 60 gsm to 160 gsm, e.g. from 80 gsm to 140 gsm, e.g. from 100 gsm to 120 gsm, e.g.
  • the filter element of the invention may be cylindrical.
  • the filter element of the invention may be cylindrical with circumference from 12 to 30 mm (e.g., 15 to 28 mm), more preferably from 17 to 25 mm, (e.g., 18 to 25 mm, e.g., 20 to 24 mm, e.g., 22 to 24 mm, e.g., 23 mm, e.g., 22 mm, e.g. 22.45 mm).
  • the wrapper engaged around the longitudinally extending core may be a paper (e.g., plugwrap), preferably a paper (e.g., plugwrap) of basis weight 20 to 160 gsm, for example a paper (e.g., plugwrap) of basis weight 24 to 150 gsm, for example a paper (e.g., plugwrap) of basis weight 70 to 150 gsm, for example a paper (e.g., plugwrap) of basis weight 70 to 140 gsm.
  • the wrapper engaged around the longitudinally extending core is biodegradable, more preferably readily biodegradable.
  • the filter element (and longitudinally extending core) may be of length 7 to 30 mm, for example 17 to 25 mm, for example 18 to 24mm, for example, 7, 8, 9, 10, 18, 19, 20, 21 , 22, 23 or 24 mm.
  • the paper and/or other biodegradable material (e.g. non-cellulose acetate containing filtering material) of the longitudinally extending core may be coated with a hydrophobic coating or hydrophobic material, as described above.
  • the filter element of the invention may be used in any multi-segment filter or consumable.
  • the filter construction could be two, three, four or more discrete segments.
  • the discrete further segments may be (e.g., cylindrical) plugs of tobacco smoke filtering material (e.g., paper) and/or a hollow (e.g., paper) tube filter.
  • the multi-segment filter may be attached to a tobacco plug (which can be made from any form of tobacco (including reconstituted)).
  • the multi-segment filter may include other filter segments that include capsule containing filters, carbon containing filters, CPS filters, tube filters, paper filters, menthol containing filters etc.
  • filters or filter elements according to the invention may be manufactured by methods and machinery well known in the art.
  • a aerosol generating article e.g. cigarette, e.g. tobacco heat product, HNB product
  • a filter or filter element according to any aspect of the invention.
  • a filter of the invention may be joined to a wrapped plug of tobacco (e.g. wrapped plug of modified tobacco, as is well known in the art).
  • the filter of the invention (or filter which includes a filter element of the invention) may be joined to the wrapped tobacco plug such that the (second) longitudinally extending core which has a pressure drop of from 0.1 to 1 mmWG per mm of its length, for example 0.31 to 0.7 mmWG per mm of its length, for example from 0.5 to 0.6 mmWG per mm (e.g.
  • the filter may be joined to the wrapped tobacco plug by ring tipping (i.e. an outer wrapper (e.g. tipping paper) which engages around just the adjacent ends of the wrapped filter and the tobacco plug to leave much of the filter wrap exposed).
  • the filter may be joined to the wrapped tobacco plug by a full tipping overwrap (i.e. an outer wrapper (e.g. tipping paper) which engages around the full wrapped filter length and the adjacent end of the tobacco plug).
  • the wrapper e.g. filter wrapper
  • the wrapper may be ventilated by e.g. laser perforations.
  • the ventilation may be applied to the wrapper (e.g. filter wrapper) before or after the filter is joined to the wrapped tobacco plug.
  • the ventilation may be (applied to the wrapper) in register with the cavity in the filter (if present).
  • the tobacco heating product and/or HNB product or HTP according to the present invention may further comprise one or more discrete further segments (e.g., of a HNB mouthpiece).
  • the discrete further segments may be (e.g., cylindrical) plugs of tobacco smoke filtering material (e.g., paper), a (e.g., cylindrical) rod of tobacco (e.g., any form of tobacco (including reconstituted tobacco)), hollow (e.g., paper) tubes, capsule containing filters, carbon containing filters, CPS filters, tube filters, acetate filters, paper filters, menthol containing filters etc.
  • Figure 1 shows a perspective view, part cut away, of a filter according to one embodiment of the invention which includes a filter element according to a further embodiment of the invention
  • Figure 2 shows a perspective view, part cut away, of a filter according to a further embodiment of the invention (different to that of figure 1) which includes a filter element according to a still further embodiment of the invention
  • Figure 3 is a graphical representation of how the temperature at the mouth end of HTPs including filters and filter elements according to the invention (Examples SAM111426- IQ- 150, SAM111426-8-150 and SAM111426-6-150) and the reference product Amber HEETS varies as puffs are taken (see Example 1).
  • Figure 1 illustrates a perspective view, part cut away, of a filter 1 for use in a aerosol generating article (e.g., a tobacco heated product and/or HNB product and/or HTP).
  • Filter 1 is cylindrical in shape with length 33 mm and circumference 22.45 mm.
  • the filter 1 includes, at the mouth end 2, a first longitudinally extending cylindrical core 3 of circumference 22.45 mm and length 10 mm.
  • the first longitudinally extending cylindrical core 3 is formed from a plug of a first filtering material in the form of a sheet of Puracel FM26 paper (300 mm Puracel® FM26 g/m 2 SWM [of Essentra pic]) which is gathered together laterally into plug form and held in place with a first core wrapper 5 of non-porous plug wrap [from Mudanjiang Hengfeng Paper Co., Ltd of Mundanjiang, China] of weight 78 gsm.
  • the filter 1 also includes a second longitudinally extending cylindrical core 7, spaced longitudinally from the first longitudinally extending cylindrical core 3 by a distance of 5 mm.
  • the second longitudinally extending cylindrical core 7 is of circumference 22.45 mm and length 18 mm.
  • the second longitudinally extending cylindrical core 7 comprises a plug of a second filtering material in the form of a sheet of ZNP paper (obtained from PT Bukit Muria Jaya (BMJ) of West Java, Indonesia) of width 300mm which is gathered laterally into rod form and held in place with a second core wrapper 9 of non-porous plug wrap [from Mudanjiang Hengfeng Paper Co., Ltd of Mundanjiang, China] of weight 78 gsm.
  • the second longitudinally extending core has a pressure drop of 0.55 mmWG per mm of its length.
  • a further filter wrapper 11 of stiff plug wrap of 78 g/m 2 weight [from Mudanjiang Hengfeng Paper Co., Ltd of Mundanjiang, China] is engaged 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. Both ends of the further wrapper 11 are flush with the ends of wrapped cores 3 and 7.
  • the filter wrapper 11 has an overlapping longitudinal edge with adhesive applied thereon which provides a lapped and stuck seam (not shown) holding the further wrapper 11 around the wrapped cores 3 and 7 and a further adhesive in anchor lines (not shown) in register with the wrapped cores 3 and 7 to hold the cores in place.
  • the first and second longitudinally extending cores 3 and 7, their respective first core wrapper 5 and second core wrapper 9, and the filter wrapper 11 are all made of paper material and are all “readily biodegradeable”, meaning they are able to disintegrate rapidly and completely biodegrade when immersed in water, such that filter 1 (and materials therein) have the ‘Ready Biodegradability’ level of biodegradability as measured according to OECD 301 B ‘Ready Biodegradability’ method (modified Sturm test), which is well known in the art.
  • filters such as filter 1 combine biodegradilbility (are “readily biodegradeable”) with a comparable thermal profile and/or comparable Aerosol Chemistry Delivery to the product in the market which uses cellulose acetate and PLA (see Example 1 below). Further the applicants have found the filters of the invention are adaptable to provide a customizable design to match a desired aerosol chemistry delivery profile.
  • the filter 1 may be made by methods known in the art and may be prepared as a multiple rod comprising a plurality (e.g. 2, 4, 6 etc.) of filters or filter rods integrally joined end-to-end.
  • the filter 1 may be joined, at the end opposite to mouth end 2, to a wrapped plug of modified tobacco, by methods well known in the art.
  • a suitable plug of reconstituted tobacco is 12 mm long and has a circumference of 22 mm. Such plugs of reconstituted tobacco are well known in the art. Together the filter and plug of tobacco form a HNB product or HTP including filter of the invention 1.
  • the tobacco plug end of a HNB product or HTP including filter of the invention 1 is inserted in a HTP device.
  • This plug is heated in use by a heating device (HTP device) to produce a vapour, as is well known in the art.
  • HTP device heating device
  • a cooling effect e.g. on aerosol drawn through the second longitudinally extending core and/or the filter
  • Figure 2 illustrates a schematic view of a further embodiment of the invention.
  • Figure 2 shows filter 101 for use in a aerosol generating article (e.g., a tobacco heated product and/or HNB product and/or HTP).
  • Filter 101 is cylindrical in shape with length 33 mm and circumference 22.45 mm.
  • the filter 101 includes, at the mouth end 102, a first longitudinally extending cylindrical core 103 of circumference 22.45 mm and length 9 mm.
  • the first longitudinally extending cylindrical core 103 is formed from a plug of a first filtering material in the form of a sheet of Puracel FM26 paper (300 mm Puracel® FM26 g/m 2 SWM [of Essentra pic]) which is gathered together laterally into plug form and held in place with a first core wrapper 105 of non-porous plug wrap [obtained from Mudanjiang Hengfeng Paper Co., Ltd of Mundanjiang, China] of weight 78 gsm.
  • the filter 101 also includes a second longitudinally extending cylindrical core 107, abutted to the first longitudinally extending cylindrical core 103 at the end opposite mouth end 102.
  • the second longitudinally extending cylindrical core 107 is of circumference 22.45 mm and length 24 mm.
  • the second longitudinally extending cylindrical core 107 comprises a plug of a second filtering material in the form of a sheet of ZNP paper (obtained from PT Bukit Muria Jaya (BMJ) of West Java, Indonesia) of width 300mm which is gathered laterally into rod form and held in place with a second core wrapper 109 of non-porous plug wrap [from Mudanjiang Hengfeng Paper Co., Ltd of Mundanjiang, China] of weight 78 gsm.
  • the second longitudinally extending core has a pressure drop of 0.55 mmWG per mm of its length.
  • a further filter wrapper 111 of stiff plug wrap of 78 g/m 2 weight [from Mudanjiang Hengfeng Paper Co., Ltd of Mundanjiang, China] is engaged around the wrapped cores 103 and 107. Both ends of the further wrapper 111 are flush with the ends of wrapped cores 103 and 107.
  • the further wrapper 111 has an overlapping longitudinal edge with adhesive applied thereon which provides a lapped and stuck seam (not shown) holding the further wrapper 111 around the wrapped cores 103 and 107 and a further adhesive in anchor lines (not shown) in register with the wrapped cores 103 and 107 to hold the cores in place.
  • the first and second longitudinally extending cores 103 and 107, their respective first and second core wrappers 105 and 109, and the further wrapper 111 are all made of paper material and are all “readily biodegradeable”, meaning they are able to disintegrate rapidly and completely biodegrade when immersed in water, such that filter 101 (and materials therein) have the ‘Ready Biodegradability’ level of biodegradability as measured according to OECD 301 B ‘Ready Biodegradability’ method (modified Sturm test), which is well known in the art.
  • filters such as filter 101 combine biodegradilbility (are “readily biodegradeable”) with a comparable thermal profile and/or comparable Aerosol Chemistry Delivery to the product in the market which uses cellulose acetate and PLA. Further the applicants have found the filters of the invention are adaptable to provide a customizable design to match a desired aerosol chemistry delivery profile.
  • This is referred to as test Example SAM111426-10-150 (abbreviated to SAM426- 10-150).
  • a second filter according to the invention of length 33 mm including a first longitudinally extending core of length 8 mm (FM26 paper); a second longitudinally extending core of length 18 mm (ZNP paper); and a cavity between the first and second longitudinally extending cores of length 7 mm, was attached to a plug of reconstituted tobacco by methods well known in the art to provide a HNB product or HTP for testing.
  • This is referred to as test Example SAM111426-8-150 (abbreviated to SAM426-8-150).
  • This is referred to as test Example SAM111426-6-150 (abbreviated to SAM 426-6- 150).
  • the reference product Amber HEETS includes a plug of reconstituted tobacco, and a 3mm long filter including a hollow acetate tube of length 7 mm (tobacco end), a PLA cooling element of length 18 mm, herein referred to as a “conventional cooling element”, and a mouth end cylindrical plug of cellulose acetate tow of length 8mm, in an analogous arrangement to that shown in Figure 1.
  • the HNB test Examples SAM111426-10-150, SAM111426-8-150 and SAM111426-6-150 and the reference Amber HEETS were compared as follows.
  • Each product was inserted into a heating device.
  • the mouth end of the product was inserted into a smoking machine which is configured to smoke the product.
  • An IR camera was used to analyse the temperature at the mouth end of the product while it was being smoked.
  • the smoking machine was configured to take a puff on the product every 30 seconds, each puff being 2 seconds long.
  • the temperature at the mouth end of the product was measured for each puff.
  • the experiment was performed at standard room temperature and humidity. The experiment was repeated for each example product i.e. SAM111426-10-150, SAM111426- 8-150, SAM111426-6-150 and the reference product Amber HEETS.
  • FIG. 3 is a graphical representation of how the temperature at the mouth end of HNB products/THP including filters and filter elements according to the invention (Examples SAM111426-10-150, SAM 111426-8-150 and SAM 111426-6-150) and the reference product Amber HEETS varies as puffs are taken.
  • filters and elements according to the present invention may provide comparable thermal profile and/or comparable Aerosol Chemistry Delivery performance to conventional cooling elements (the reference), while also providing improved biodegradability (because they do not contain e.g. PLA elements).

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)

Abstract

La présente invention concerne un filtre (1) destiné à être utilisé dans un article de génération d'aérosol, le filtre comprenant un premier noyau s'étendant longitudinalement (3) comprenant un premier matériau de filtration, un second noyau s'étendant longitudinalement (7) comprenant un second matériau de filtration. Le second noyau s'étendant longitudinalement a une chute de pression de 0,1 à 1 mmWG par mm de sa longueur et une enveloppe (11) en prise autour des premier et second noyaux s'étendant longitudinalement. Les premier et second matériaux de filtration contiennent du papier et/ou un autre matériau biodégradable. Le second noyau s'étendant longitudinalement est formé à partir d'un papier et/ou d'un autre matériau biodégradable qui est rassemblé latéralement en forme de tige et maintenu en place.
PCT/EP2023/081083 2022-11-09 2023-11-08 Filtre durable et élément filtre WO2024100084A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB2216672.2A GB202216672D0 (en) 2022-11-09 2022-11-09 A sustainable filter and filter element
GB2216672.2 2022-11-09

Publications (1)

Publication Number Publication Date
WO2024100084A1 true WO2024100084A1 (fr) 2024-05-16

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GB (1) GB202216672D0 (fr)
WO (1) WO2024100084A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021074222A1 (fr) 2019-10-16 2021-04-22 Essentra Filter Products Development Co. Pte. Ltd Élément de refroidissement
WO2021123820A1 (fr) * 2019-12-20 2021-06-24 Nicoventures Trading Limited Composant pour un article destiné à être utilisé dans un système de fourniture d'aérosol non combustible
WO2021123843A1 (fr) * 2019-12-20 2021-06-24 Nicoventures Trading Limited Article destiné à être utilisé dans un système de fourniture d'aérosol et article destiné à être utilisé dans un système de fourniture d'aérosol non combustible
KR20220133429A (ko) * 2021-03-25 2022-10-05 주식회사 케이티앤지 냉각 성능과 향 지속성이 증진된 에어로졸 발생 물품 및 그의 제조 방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021074222A1 (fr) 2019-10-16 2021-04-22 Essentra Filter Products Development Co. Pte. Ltd Élément de refroidissement
WO2021123820A1 (fr) * 2019-12-20 2021-06-24 Nicoventures Trading Limited Composant pour un article destiné à être utilisé dans un système de fourniture d'aérosol non combustible
WO2021123843A1 (fr) * 2019-12-20 2021-06-24 Nicoventures Trading Limited Article destiné à être utilisé dans un système de fourniture d'aérosol et article destiné à être utilisé dans un système de fourniture d'aérosol non combustible
KR20220133429A (ko) * 2021-03-25 2022-10-05 주식회사 케이티앤지 냉각 성능과 향 지속성이 증진된 에어로졸 발생 물품 및 그의 제조 방법
EP4140328A1 (fr) * 2021-03-25 2023-03-01 KT&G Corporation Article de génération d'aérosol à performance de refroidissement et persistance de parfum améliorées, et son procédé de production

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