EP4210518A1 - Filtre pour article à fumer ou de vapotage comprenant un substrat non tissé - Google Patents

Filtre pour article à fumer ou de vapotage comprenant un substrat non tissé

Info

Publication number
EP4210518A1
EP4210518A1 EP21773616.4A EP21773616A EP4210518A1 EP 4210518 A1 EP4210518 A1 EP 4210518A1 EP 21773616 A EP21773616 A EP 21773616A EP 4210518 A1 EP4210518 A1 EP 4210518A1
Authority
EP
European Patent Office
Prior art keywords
fibers
nonwoven substrate
filter
fiber
binder
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
EP21773616.4A
Other languages
German (de)
English (en)
Inventor
Oxana CHERKAS
Diane Raverdy-Lambert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SWM Luxembourg SARL
Original Assignee
SWM Luxembourg SARL
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 SWM Luxembourg SARL filed Critical SWM Luxembourg SARL
Publication of EP4210518A1 publication Critical patent/EP4210518A1/fr
Pending legal-status Critical Current

Links

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
    • 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
    • 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
    • A24D3/17—Filters 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
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/062—Use of materials for tobacco smoke filters characterised by structural features
    • A24D3/063—Use of materials for tobacco smoke filters characterised by structural features of the fibers
    • 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
    • A24D3/02—Manufacture of tobacco smoke filters
    • 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
    • A24D3/02—Manufacture of tobacco smoke filters
    • A24D3/0229—Filter rod forming processes
    • 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
    • A24D3/02—Manufacture of tobacco smoke filters
    • A24D3/025—Final operations, i.e. after the filter rod forming process
    • A24D3/0254—Cutting means
    • 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
    • A24D3/14—Use of materials for tobacco smoke filters of organic materials as additive
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/425—Cellulose series
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/425—Cellulose series
    • D04H1/4258—Regenerated cellulose series
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4266—Natural fibres not provided for in group D04H1/425
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/60—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in dry state, e.g. thermo-activatable agents in solid or molten state, and heat being applied subsequently

Definitions

  • a subject of the invention is a filter comprising a nonwoven substrate having a low density and comprising natural fibers and a binder.
  • This nonwoven substrate is capable of being obtained by a drylaid process.
  • This filter can be used as filter for a smoking or vaping article.
  • a filter for a smoking or vaping article has a right circular cylindrical shape and generally comprises an outer envelope of plug wrap paper and a substrate located within the outer envelope.
  • the filter for a smoking or vaping article by virtue of the substrate, makes it possible to prevent the user from inhaling tobacco particles and allows retention of the harmful particulate substances contained in the smoke or the aerosol, such as tar.
  • Filters are commonly made from cellulose acetate. These cellulose acetate filters have a nicotine retention capacity such that the user's perception of the filtered smoke is satisfactory. In addition, these filters generate a filtered smoke having good organoleptic properties. However, these cellulose acetate substrates degrade very slowly and are not dispersible in water. This is particularly harmful since the filter is not consumed during the smoking/vaping of a smoking/vaping article and is regularly found in the environment. Cellulose acetate substrates thus have a significant environmental impact.
  • a filter comprising a nonwoven substrate comprising natural fibers and a binder, in which the natural fibers represent between 70% and 99%, in particular between 80% and 98%, very particularly between 85% and 98% by weight of solids of said nonwoven substrate, the binder represents between 1 % and 30%, in particular between 2% and 20%, very particularly between 2% and 15% by weight of solids of said nonwoven substrate, and characterized in that the nonwoven substrate has a density of between 7 mg/cm 3 and 60 mg/cm 3 , in particular between 8 mg/cm 3 and 50 mg/cm 3 , very particularly between 10 mg/cm 3 and 40 mg/cm 3 .
  • the filter of the invention has a nicotine retention capacity of the same order of magnitude as the retention capacities of a filter comprising a cellulose acetate substrate. Consequently, the user's perception of the smoke filtered by the filter of the invention is satisfactory.
  • the smoke filtered by the filter of the invention has organoleptic properties which are satisfactory for the user.
  • the nonwoven substrate can also make it possible to produce the filter of the invention without a prior shaping step, which is not the case for paper substrates.
  • the process for producing the filter of the invention is simplified.
  • a process for producing the filter of the invention comprising a nonwoven substrate, said process comprising the following steps: a) forming a rod of nonwoven substrate from a nonwoven substrate, b) wrapping the rod of nonwoven substrate with a sheet of plug wrap paper, c) depositing an adhesive line, joining the sheet of plug wrap paper to obtain a rod of filtering material, d) cutting the rod of filtering material to produce the filter.
  • nonwoven substrate is as defined above or is obtained by a process comprising the following steps: i) producing a web from natural fibers by a drylaid process, ii) introducing the binder into the web, and iii) drying the web resulting from step ii) to obtain the nonwoven substrate.
  • a filter comprising a nonwoven substrate comprising natural fibers and a binder, in which the natural fibers represent between 70% and 99%, in particular between 80% and 98%, very particularly between 85% and 98% by weight of solids of said nonwoven substrate, the binder represents between 1 % and 30%, in particular between 2% and 20%, very particularly between 2% and 15% by weight of solids of said nonwoven substrate; characterized in that the nonwoven substrate has a density of between 7 mg/cm 3 and 60 mg/cm 3 , in particular between 8 mg/cm 3 and 50 mg/cm 3 , very particularly between 10 mg/cm 3 and 40 mg/cm 3 .
  • nonwoven substrate of the filter of the invention has a higher filter filling power than the filling power of a paper substrate.
  • This higher filling power makes it possible to reduce the amount of nonwoven substrate present in the filter such that the filter of the invention has a nicotine retention capacity of the same order of magnitude as the retention capacity of a filter comprising a cellulose acetate substrate.
  • nonwoven substrate also referred to as “non-woven substrate” denotes a manufactured sheet consisting of a web or ply of directionally or randomly oriented fibers bonded together by friction and/or cohesion and/or adhesion.
  • the density of the nonwoven substrate is calculated by dividing its grammage by its thickness.
  • the standard ISO 536:2012 can be used to determine the grammage of the nonwoven substrate.
  • the substrate is conditioned for at least 16 hours at 23°C and 50% humidity before the measurement.
  • a dead-weight micrometer comprising a 25 cm 2 measuring head with two planar, parallel and circular pressure surfaces. During the measurement, the nonwoven substrate is placed between the two pressure surfaces for 10 seconds. The pressure exerted between the pressure surfaces during the measurement of the thickness is 0.5 kPa. The substrate is conditioned for at least 16 hours at 23°C and 50% humidity before the measurement.
  • the grammage of the nonwoven substrate of the filter of the invention can for example be between 20 g/m 2 and 60 g/m 2 , in particular between 23 g/m 2 and 57 g/m 2 , more particularly between 25 g/m 2 and 55 g/m 2 .
  • the thickness of the nonwoven substrate of the filter of the invention can for example be between 700 pm and 6000 pm, in particular between 1000 pm and 4700 pm, more particularly between 2000 pm and 4500 pm.
  • the nonwoven substrate can have a density of between 10 mg/cm 3 and 40 mg/cm 3 , and a thickness of between 2000 pm and 4500 pm.
  • the term "natural fiber” denotes a fiber of natural origin which has optionally undergone a chemical treatment, a physical treatment, or both, in order to optimize the physical characteristics thereof.
  • the natural fibers can be chosen from wood fibers, leaf fibers, fruit fibers, seed fibers, bast fibers, stalk fibers, reed fibers, and mixtures thereof, in particular wood fibers, leaf fibers, seed fibers, bast fibers, and mixtures thereof, more particularly wood fibers, bast fibers and mixtures thereof.
  • wood fibers which may be present in the nonwoven substrate of the filter of the invention can be lyocell fibers (cellulose fibers which are ground and dissolved in N-methylmorpholine N-oxide monohydrate for the purpose of obtaining fibers with a cross section of variable shape (round, oval, cross-shaped, circular, lamellar cross section) with calibrated length and mass per unit length, which the person skilled in the art can choose depending on their needs), viscose fibers (fibers obtained by dissolving cellulose by means of modification of its hydroxyl groups by carbon disulfide (CS2) and then its precipitation in the presence of sulfuric acid (H2SO4) for the purpose of obtaining fibers with a cross section of variable shape (round, oval, cross-shaped, circular, lamellar cross section) with calibrated length and mass per unit length, which the person skilled in the art can choose depending on their needs), and mixtures thereof, in particular lyocell fibers, viscose fibers, and mixtures thereof.
  • lyocell fibers cellulose fiber
  • bast fiber denotes a plant fiber contained in the bast of the plants.
  • hemp fiber As bast fiber, mention may be made of hemp fiber, Indian hemp fiber, jute fiber, kenaf fiber, kudzu fiber, flax fiber, okra fiber, nettle fiber, ramie fiber, and mixtures thereof, in particular hemp fiber, flax fiber, and a mixture thereof, more particularly flax fiber.
  • the bast fibers may have undergone prior treatment.
  • the bast fibers may be cottonized bast fibers, individualized bast fibers, bast fibers which have undergone retting, bleached bast fibers, and mixtures thereof, in particular cottonized bast fibers, individualized bast fibers and a mixture thereof.
  • seed fiber denotes a fiber obtained from seeds of a plant.
  • seed fibers can be cotton fiber, kapok fiber, luffa fiber, milkweed fiber, and mixtures thereof, in particular kapok fiber.
  • the natural fibers are chosen from lyocell fibers, flax fibers, cottonized flax fibers, cotton fiber and mixtures thereof, in particular a mixture of cottonized flax fibers and lyocell fibers.
  • the natural fibers of the nonwoven substrate can be a mixture of natural fibers comprising cottonized flax fibers and lyocell fibers, the cottonized flax fibers represent more than 50%, in particular between 70% and 98%, more particularly between 85% and 95% by weight of solids of said mixture of fibers, and the lyocell fibers representing less than 50%, in particular between 2% and 30%, more particularly between 5% and 15% by weight of solids of said mixture of fibers.
  • the natural fibers, before use in the nonwoven substrate can have a length of between 10 mm and 150 mm, in particular between 15 mm and 100 mm, more particularly between 20 mm and 60 mm.
  • a drylaid process is particularly suitable for this size of natural fibers.
  • the nonwoven substrate of the filter of the invention of this alternative embodiment can be obtained by a drylaid process.
  • the length of the natural fibers can be measured by a Classifiber KCF-V/LS apparatus from Keisokki. Natural fibers are combed and individualized before measurement. The sizes of the fibers are measured automatically by an optical method.
  • the natural fibers may also be cut so as to have a length within the ranges mentioned above.
  • Conventional cutting techniques which can be used are guillotine cutting of natural fibers, grinding of the natural fibers with or without a system for removing excessively short and excessively long fibers of air cyclone or screen type.
  • binder denotes a compound having properties enabling consolidation of the nonwoven substrate.
  • the binder can be a natural polymer, a synthetic polymer or copolymer or a mixture thereof.
  • the natural polymer can be a polysaccharide, a cellulose derivative, or a mixture thereof.
  • the synthetic polymer can be a latex.
  • the polysaccharide which can be used as binder can be a polysaccharide or a polysaccharide derivative.
  • starch, dextrin, gum arabic, and mixtures thereof can be used as binder, in particular starch.
  • the cellulose derivative can be chosen from ethyl cellulose, methyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose, carboxymethyl cellulose, an alkali metal salt of carboxymethyl cellulose, and mixtures thereof, in particular carboxymethyl cellulose.
  • alkali metal of the carboxymethyl cellulose salt mention may be made of potassium, sodium, and magnesium.
  • the synthetic polymer or copolymer can, for example, be a polyvinyl alcohol, an ethylene-vinyl alcohol, a polyvinyl acetate, a polyvinyl chloride, a styrenebutadiene, a polybutadiene, polyacrylics, an ethylene-vinyl acetate, and mixtures thereof, in particular polyvinyl alcohol.
  • the nonwoven substrate can comprise: a mixture of fibers comprising between 85% and 95% of cottonized flax fibers by weight of solids of said mixture of fibers and between 5% and 15% of lyocell fibers by weight of solids of said mixture of fibers, and a binder chosen from starch, polyvinyl alcohol, ethylene-vinyl acetate, which can represent between 2% and 15%, in particular between 2% and 8% by weight of solids of said nonwoven substrate, in which the mixture of fibers can represent between 85% and 98%, in particular between 92% and 98% by weight of solids of said nonwoven substrate; and can have a density of between 10 mg/cm 3 and 40 mg/cm 3 .
  • the nonwoven substrate of this other very particular embodiment can be obtained by a drylaid process.
  • the filter of the invention can be a filter for a smoking or vaping article.
  • smoking article denotes an article comprising tobacco and/or any other plant intended to be smoked.
  • the smoking article may be a machine-manufactured cigarette, a roll-your- own cigarette or a make-your-own cigarette.
  • the filter for a smoking article has a right circular cylindrical shape and comprises an outer envelope of plug wrap paper for a smoking article, in particular for a cigarette, and the nonwoven substrate of the filter of the invention as defined above located within the outer envelope.
  • vaping article denotes an article comprising tobacco and/or any other plant intended to be vaped, which is intended to be inserted into a device which heats the tobacco and/or the plant without burning said tobacco/plant and which enables delivery of an aerosol to a user.
  • the vaping article can be a tobacco stick.
  • the filter for a vaping article has a right circular cylindrical shape and comprises an outer envelope of plug wrap paper for a vaping article, in particular for a tobacco stick, and the nonwoven substrate of the filter of the invention as defined above located within the outer envelope.
  • the filter of the invention can have a density of between 100 mg/cm 3 and 200 mg/cm 3 , in particular between 1 10 mg/cm 3 and 170 mg/cm 3 , more particularly between 115 mg/cm 3 and 160 mg/cm 3 .
  • the density of the filter is measured after manufacture of the filters, by dividing the mass of the filter by its volume.
  • the nonwoven substrate of the filter of the invention may not be crimped before the formation of the filter. This is highly advantageous since it makes it possible to produce a filter while simplifying the production of the filter.
  • the present invention also relates to a smoking article comprising a filter as defined above.
  • the present invention also relates to a vaping article comprising a filter as defined above.
  • the present invention also relates to the use of a nonwoven substrate as defined above in a filter, in particular a filter for a smoking article or a filter for a vaping article.
  • the present invention also relates to a process for producing a filter for a smoking or vaping article comprising a nonwoven substrate, said process comprising the following steps: a) forming a rod of nonwoven substrate from a nonwoven substrate, b) wrapping the rod of nonwoven substrate with a sheet of plug wrap paper, c) depositing an adhesive line, joining the sheet of plug wrap paper to obtain a rod of filtering material, d) cutting the rod of filtering material to produce the filter.
  • nonwoven substrate is as defined above or is obtained by a process comprising the following steps:: i) producing a web from natural fibers by a drylaid process, and ii) introducing the binder into the web, iii) drying the web resulting from step ii) to obtain the nonwoven substrate.
  • the nonwoven substrate, the natural fibers and the binder are as described above in relation to the nonwoven substrate.
  • the filter for a smoking or vaping article produced by the production process of the invention has a right circular cylindrical shape and comprises an outer envelope of plug wrap paper for a filter for a smoking or vaping article and the nonwoven substrate of the filter of the invention as defined above located within the outer envelope.
  • the nonwoven substrate of the filter of the invention can therefore be obtained by a drylaid process.
  • the drylaid process and the airlaid process are two different the conventional routes known to the person skilled in the art to produce a web.
  • the person skilled in the art will know how to adapt the parameters of the drylaid process to produce the nonwoven substrate of the filter of the invention.
  • the process of the invention can comprise, if need be, before production step i), a step i1 ) of cutting the natural fibers to obtain natural fibers having a length within the ranges mentioned above.
  • Cutting step i1 can be carried out by conventional techniques such as guillotine cutting, grinding of the natural fibers with or without a system for removing excessively short and excessively long fibers of air cyclone or screen type.
  • an aqueous dispersion of the binder is introduced into the web.
  • This introduction may for example be carried out by impregnation, such as impregnation with a size press, by spraying, such as spraying using a spray, by surface application, such as surface application by coating or by printing, in particular by spraying a spray.
  • spraying will be performed on both faces of the web.
  • the aqueous dispersion of the binder can be obtained by any technique known to the person skilled in the art.
  • the person skilled in the art will know how to adapt the concentration of binder in the aqueous dispersion to obtain the desired content of binder in the nonwoven substrate of the filter of the invention.
  • Drying step iii) can, for example, be carried out by a drying device, such as a tunnel through which air passes or an infrared ramp.
  • This drying step iii) can be carried out at a temperature of between 75°C and 200°C, in particular between 90°C and 170°C, more particularly between 100°C and 120°C.
  • a temperature within these ranges advantageously makes it possible to minimize the duration of this drying step iii) while at the same time minimizing the deterioration of the natural fibers of the nonwoven substrate, thus optimizing the process of the invention.
  • the combination of the introduction step ii) and of the drying step iii) makes it possible to improve the cohesion of the natural fibers and hence to consolidate the structure of the nonwoven substrate of the filter of the invention.
  • the natural fibers used in production step i) can be a mixture of natural fibers. This mixture of natural fibers can be obtained before production step i).
  • the natural fibers can be bast fibers which have undergone prior treatment, such as cottonized bast fibers, individualized bast fibers, bast fibers which have undergone retting and mixtures thereof, in particular cottonized bast fibers, individualized bast fibers and mixtures thereof.
  • the process of the invention can thus comprise, before production step i), a step i2) of treating the bast fibers chosen from retting, bleaching, cottonizing, individualizing, and a mixture thereof, in particular cottonizing, individualizing or individualizing followed by cottonizing.
  • Cottonizing is a treatment in which the fibers are refined in order to pass through cotton mills.
  • the person skilled in the art knows how to implement a cottonizing treatment step i2).
  • Individualizing is a treatment in which all or some of the fibers of a set of fibers are separated from one another. Individualizing can, for example, be carried out by combing or by a chemical treatment.
  • This treatment step i2) may take place before, after or before and after optional cutting step i1 ).
  • the bast fibers may undergo, optionally, individualizing treatment step i2), cutting step i1 ) to obtain bast fibers having a length within the abovementioned ranges, then optionally cottonizing treatment step i2), in particular cutting step i1 ) to obtain bast fibers having a length within the abovementioned ranges, then cottonizing treatment step i2).
  • the process may also comprise, between production step i) and introduction step ii), a step ii1 ) of compacting the web to obtain a compacted web, this compacted web then undergoing introduction step ii).
  • This compacting step ii1 ) can make it possible to reduce the thickness of the web in order to control the density of the nonwoven substrate.
  • the process can comprise the following steps: i) producing a web by a drylaid process from a mixture of natural fibers comprising between 85% and 95% of cottonized flax fibers by weight of solids of said mixture of fibers and between 5% and 15% of lyocell fibers by weight of solids of said mixture of fibers, ii) introducing a binder chosen from starch, polyvinyl alcohol, ethylene-vinyl acetate or a mixture thereof into the web by spraying an aqueous dispersion of binder, iii) drying the web resulting from step ii) to obtain a nonwoven substrate which can have a density of between 10 mg/cm 3 and 40 mg/cm 3 and in which the mixture of fibers can represent between 85% and 98% by weight of solids of said nonwoven substrate and binder can represent between 2% and 15% by weight of solids of said nonwoven substrate.
  • the nonwoven substrate obtained at step iii) may be calendered.
  • the nonwoven substrate may be packed as bobbin, as roll by a spooling process or in paperboard by a festooning process.
  • Example 1 Manufacture of the nonwoven substrate
  • the air permeability is determined using “FX3300 Lab Air IV” Air permeability tester. During the measurements, the tested web is placed under the measurement head and we measured the air flow passing through the web at pressure drop of 200 Pa over the area of 20 cm 2 . The permeability is measured in [cm 3 /cm 2 /sec]. For each sample, three measurements were made and the indicated air permeability is the average value.
  • Example 1.1 Nonwoven substrate prepared by a drylaid process and comprising 95% by weight of solids of said nonwoven substrate of a mixture of cottonized flax fibers and of lyocell fibers (90% cottonized flax/10% lyocell by weight of solids of the mixture of fibers) and 5% by weight of solids of said nonwoven substrate of starch
  • the cottonized flax fibers (VERVAEKE FIBRE NV, 22 mm in length) and the lyocell fibers (1 .7 dtex / 38 mm in length from Lenzig) were mixed, opened and parallelized with a card before being deposited on a forming fabric.
  • a solution comprising 5% solids content of starch (Perfectafilm X1 15 manufactured by Avebe) is sprayed onto both sides of the web. The sprayed web is then dried by hot air oven at a temperature of between 100°C and 120°C. The content of binder in the web is 5%.
  • the nonwoven substrate obtained has a density of 11 mg/cm 3 , a thickness of 4190 pm, a grammage of 47 g/m 2 and an air permeability of 650 cm 3 . cm -2 . sec -1 .
  • All the examples have the same fiber size, with an average length before manufacture of 22 mm for the cottonized flax fibers and of 38 mm for the lyocell fibers.
  • Example 1.2 Nonwoven substrate prepared by a drylaid process and comprising 95% by weight of solids of said nonwoven substrate of a mixture of cottonized flax fibers and of lyocell fibers (90% cottonized flax/10% lyocell by weight of solids of the mixture of fibers) and 5% by weight of solids of said nonwoven substrate of starch
  • the nonwoven substrate is obtained by the process described in example 1.1. After drying, the web was compacted at a pressure of 1 bar. The content of binder in the web is 5%.
  • the nonwoven substrate obtained has a density of 22 mg/cm 3 , a thickness of 1900 pm, a grammage of 42 g/m 2 and an air permeability of 640 cm 3 . cm -2 . sec -1 .
  • Example 1.3 Nonwoven substrate prepared by a drylaid process and comprising 88% by weight of solids of said nonwoven substrate of a mixture of cottonized flax fibers and of lyocell fibers (90% cottonized flax/10% lyocell by weight of solids of the mixture of fibers) and 12% by weight of solids of said nonwoven substrate of starch [0088]
  • the nonwoven substrate is obtained by the process described in example
  • the content of binder in the web is 12%.
  • the nonwoven substrate obtained has a density of 14 mg/cm 3 , a thickness of 2040 pm, a grammage of 29 g/m 2 and an air permeability of 890 cm 3 . cm -2 . sec -1 .
  • Example 1.4 Nonwoven substrate prepared by a drylaid process and comprising 95% by weight of solids of said nonwoven substrate of a mixture of cottonized flax fibers and of lyocell fibers (90% cottonized flax/10% lyocell by weight of solids of the mixture of fibers) and 5% by weight of solids of said nonwoven substrate of polyvinyl alcohol
  • the nonwoven substrate is obtained by the process described in example
  • a solution comprising 5% solids content of polyvinyl alcohol (Elvanol 71 -30 manufactured by Kuraray) is sprayed onto both sides of the web.
  • the content of binder in the web is 5%.
  • the nonwoven substrate obtained has a density of 17 mg/cm 3 , a thickness of 2500 pm, a grammage of 43 g/m 2 and an air permeability of 800 cm 3 . cm -2 . sec -1 .
  • Example 1.5 Nonwoven substrate prepared by a drylaid process and comprising 85% by weight of solids of said nonwoven substrate of lyocell fibers and 15% by weight of solids of said nonwoven substrate of starch.
  • the nonwoven substrate is obtained by the process described in example
  • the binder level in the web is 15%.
  • the non-woven substrate has a density of 13 mg/cm3, a thickness of 2690 pm, a basis weight of 36 g/m 2 and an air permeability of 660 cm 3 .cnr 2 .sec _1 .
  • Example 1.6 Nonwoven substrate prepared by a drylaid process and comprising 91 % by weight of solids of said nonwoven substrate of cottonized flax fibers and lyocell fibers mixture (90% cottonized flax /10% lyocell by weight of the fiber mixture) and 9% by weight of solids of said nonwoven substrate of ethylenevinyl acetate.
  • the nonwoven substrate is obtained by the process described in example
  • the non-woven substrate has a density of 22 mg/cm3, a thickness of 1600 pm, a basis weight of 38 g/m 2 and an air permeability of 712 cm 3 .cnr 2 .sec -1 .
  • Example 1.7 Nonwoven substrate prepared by a drylaid process and comprising 92% by weight of solids of said nonwoven substrate of cottonized flax fibers and lyocell fibers mixture (90% cottonized flax 710% lyocell by weight of the fiber mixture) and 8% by weight of solids of said nonwoven substrate of starch
  • the nonwoven substrate is obtained by the process described in example 1.1. After the drying, the web was calendared with a pressure of 7 bar. The binder level in the web is 8%.
  • the non-woven web has a density of 44 mg/cm3, a thickness of 900 pm and a basis weight of 40 g/m 2 .
  • Example 2 Manufacture and characterization of filters for a smoking article
  • Filters for a smoking article were manufactured with the substrates of examples 1.1 to 1 .7 by a standard method for manufacturing filters without passage through a crimping machine.
  • a nonporous plug wrap paper was used to wrap the rods of nonwoven filtering material.
  • the filters of the invention were compared with the paper filter and with the commercial cellulose acetate filter.
  • the paper filter was made using a standard method for manufacturing filters by crimping the substrate CF 36 of 36 g/m 2 and 100 pm thickness. The filters obtained for each term were cut into 21 -mm sticks.
  • Example 3 Manufacture and characterization of cigarettes
  • Cigarettes were prepared using the filters described in example 2. To form the cigarettes, the rods of tobacco were assembled with the filters using tipping paper. A commercial "American blend" tobacco was used to form the rods of tobacco. The cigarettes were prepared with a pressure difference similar to that of the commercial cigarette. The ventilation of the cigarettes was blocked.
  • Table 2 demonstrates that, with an equivalent pressure drop, the cigarettes with filters according to the invention and the cigarettes comprising a commercial cellulose acetate filter have a nicotine content in the smoke which is of the same order of magnitude, whereas the cigarettes comprising a filter made from crimped paper have a much lower nicotine content in the smoke.
  • This example 3 thus demonstrates that the user experience provided by the cigarettes comprising the filters comprising the substrate according to the invention is as satisfactory as that provided by cigarettes comprising a commercial cellulose acetate filter.

Abstract

La présente invention concerne un filtre comprenant un substrat non tissé ayant une faible densité et comprenant des fibres naturelles ainsi qu'un liant. Le filtre peut être utilisé comme filtre pour un article à fumer ou de vapotage.
EP21773616.4A 2020-09-11 2021-09-10 Filtre pour article à fumer ou de vapotage comprenant un substrat non tissé Pending EP4210518A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2009247A FR3114009B1 (fr) 2020-09-11 2020-09-11 Filtre pour article à fumer ou vapoter comprenant un substrat nontissé
PCT/EP2021/074955 WO2022053625A1 (fr) 2020-09-11 2021-09-10 Filtre pour article à fumer ou de vapotage comprenant un substrat non tissé

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EP4210518A1 true EP4210518A1 (fr) 2023-07-19

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EP (1) EP4210518A1 (fr)
JP (1) JP2023541885A (fr)
KR (1) KR20230068414A (fr)
CN (1) CN116056593A (fr)
AU (1) AU2021339948A1 (fr)
CA (1) CA3191611A1 (fr)
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WO2023079330A1 (fr) * 2021-11-08 2023-05-11 Steelcase Inc. Procédé de fabrication d'un produit semi-fini et d'une pièce, et produit semi-fini et pièce

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GB739002A (en) * 1952-04-25 1955-10-26 Kristinus G M B H Improvements in or relating to filter cigarettes
CN101189380B (zh) * 2005-04-01 2012-12-19 博凯技术公司 用于隔音的非织造材料和制造工艺
GB0818186D0 (en) * 2008-10-06 2008-11-12 3M Innovative Properties Co Scouring material comprising natural fibres
FR2982283B1 (fr) * 2011-11-07 2015-01-16 Faurecia Automotive Ind Procede de fabrication d'un voile continu de fibres comprenant des fibres longues naturelles, installation et voile associes
GB2525363B (en) * 2014-05-23 2016-10-19 Greenbutts Llc Biodegradable cigarette filter tow and method of manufacture
JP6259365B2 (ja) * 2014-07-02 2018-01-10 王子キノクロス株式会社 クッキングペーパーとその製造方法
US10383369B2 (en) * 2017-06-07 2019-08-20 Rai Strategic Holdings, Inc. Fibrous filtration material for electronic smoking article
US11013267B2 (en) * 2017-09-22 2021-05-25 Altria Client Services Llc Non-combustible tobacco vaping insert, and a cartridge containing the non-combustible tobacco vaping insert
GB201721741D0 (en) * 2017-12-22 2018-02-07 Essentra Filter Products Dev Co Pte Ltd Smoking article mouthpiece
CN110720665B (zh) * 2019-10-15 2021-11-05 南通醋酸纤维有限公司 一种气溶胶生成结构、制备方法及应用

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KR20230068414A (ko) 2023-05-17
FR3114009B1 (fr) 2023-01-06
CN116056593A (zh) 2023-05-02
CA3191611A1 (fr) 2022-03-17
AU2021339948A1 (en) 2023-04-06
US20220079217A1 (en) 2022-03-17
WO2022053625A1 (fr) 2022-03-17
JP2023541885A (ja) 2023-10-04
FR3114009A1 (fr) 2022-03-18
AU2021339948A8 (en) 2023-04-13

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