EP4388895A1 - Papier pour la fabrication de filtres jetables de cigarettes et procédé de fabrication de celui-ci - Google Patents

Papier pour la fabrication de filtres jetables de cigarettes et procédé de fabrication de celui-ci Download PDF

Info

Publication number
EP4388895A1
EP4388895A1 EP21954103.4A EP21954103A EP4388895A1 EP 4388895 A1 EP4388895 A1 EP 4388895A1 EP 21954103 A EP21954103 A EP 21954103A EP 4388895 A1 EP4388895 A1 EP 4388895A1
Authority
EP
European Patent Office
Prior art keywords
paper
fibres
natural
comprised
weight
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
EP21954103.4A
Other languages
German (de)
English (en)
Inventor
Paula AMUNARRIZ ALBERDI
Senen AMUNARRIZ ALBERDI
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.)
Papel Aralar SA
Original Assignee
Papel Aralar SA
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 Papel Aralar SA filed Critical Papel Aralar SA
Publication of EP4388895A1 publication Critical patent/EP4388895A1/fr
Pending legal-status Critical Current

Links

Images

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
    • A24D3/06—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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only

Definitions

  • the present invention relates to the industry dedicated to the production of cigarettes, proposing a paper intended for producing a cigarette filter and, preferably, for producing its core, as well as the method for producing that paper; such that it provides the filter with the ability to disperse in water, added to being biodegradable.
  • the filters are made with normal machine paper of greater or lesser weight.
  • the paper used is normally long fibre cellulose-based, to which chemical products are added that give flavour to the filter, that affect its proper functioning as such a filter and that, above all, although they provide the condition of biodegradability, the filter is not dispersible.
  • biodegradable filters behave like an apple that, being biodegradable, is not dispersible and if it is flushed down the toilet it gets stuck.
  • the lack of dispersibility in cigarette filters also translates into serious environmental problems, in places such as beaches, the banks of rivers and reservoirs, etc.
  • European Patent EP2985375 held by Glatfelter , is a dispersible non-woven fabric but expressly applicable for producing what are known as wipes and not for use in the production of cigarette filters.
  • PCT WO95/35044 held by Philip Morris et al. discloses a cigarette filter made by a mixture of Lyocell filaments with one or more other types of fibres, such as cellulose acetate filaments or wood pulp fibres, subjecting all of them to a hydroentanglement process, by using pressurised waterjets.
  • This Patent also discloses the use of chemical solvents because its aim is to obtain a biodegradable filter, such chemical solvents being incompatible with the concept of dispersibility that is sought by the present invention, in which the cigarette filter should be, in addition to being biodegradable, dispersible and dispersibility is the main aim; such that for this purpose, the material that constitutes it cannot incorporate any amount of chemical product, because this would go directly against its dispersibility.
  • European Patent EP2761085 held by Delfortgroup discloses a paper that can be used for making cigarette filters, the aim of which is to achieve the dispersion or disintegration of the filter in water to improve the biological degradability of a cigarette filter made from that paper.
  • This Patent proposes a filter made in at least 95% by weight pulp fibres. Of these pulp fibres, 0 to 90% is mercerised pulp and the rest is long fibre pulp.
  • Mercerised pulp is made by treating cotton fibre with caustic soda and then washing it. With this treatment it undergoes certain changes in its process, which can affect the biodegradability of the final fibre. Furthermore, cotton fibres, even though they are cellulose, are already less biodegradable than long-fibre natural pulp fibres and more difficult to produce for the paper industry, in "shortcut" fibre version.
  • a material for a cigarette filter made up of a hydroentangled non-woven fabric, made up of wood pulp fibres, fibres made from regenerated cellulose and non-natural polymers, indicating that, to ensure good biodegradability, it must contain less than 30% non-natural polymers.
  • the subject matter of the present invention is that the filter of the cigarette is, in addition to being biodegradable, dispersible and dispersibility is the main aim; such that for this purpose, the material that constitutes it, cannot incorporate any amount of non-natural polymers (synthetic polymers).
  • the present invention provides a paper for producing a filter of a cigarette and the method for producing this paper that can be made entirely with cellulose fibres, of which between 70 and 90% by weight are natural, virgin or recycled pulp fibres, with a length comprised between 0.5 and 4 mm; while between 10 and 30% weight are short regenerated cellulose fibres, with the particular feature that this regenerated cellulose fibre, which is normally a fibre of the order of 38 mm, is now cut into even smaller pieces, in a measurement comprised between 8 and 12 mm.
  • cellulose fibres of which between 70 and 90% by weight are natural, virgin or recycled pulp fibres, with a length comprised between 0.5 and 4 mm; while between 10 and 30% weight are short regenerated cellulose fibres, with the particular feature that this regenerated cellulose fibre, which is normally a fibre of the order of 38 mm, is now cut into even smaller pieces, in a measurement comprised between 8 and 12 mm.
  • the product obtained has a high degree of liquid absorption, specifically water.
  • the product obtained according to the present invention does not contain any non-natural polymer, that is, no synthetic polymer and it does not contain chemical products in general, such as binding additives or chemical glues.
  • This together with the specific fibre length ranges, the method for producing the product itself and other technical features that will be seen in detail later, makes the absorption very high, reaching levels over 900%. Thanks to this property, the thus hydroentangled and bonded high-strength fibres, lose their bonds based on hydrogen bonds (which are destroyed in water) and therefore this network of fibres dissolves, providing the product with the important property of instant dispersibility in water.
  • the paper which is subject matter of the present invention can be produced in a composition in which 100% of its weight is cellulose fibres made up of a mixture of natural pulp fibres and short regenerated cellulose fibres, but, optionally and as reinforcement of the bonds between fibres, additives can also be added, as long as these are natural.
  • These natural additives can be added in mass and/or on the surface. If the natural additive is added in mass to the dissolution of fibres in water, its percentage by weight is comprised between 1 and 5% of the total weight of the product; whereas if it is added on the surface, as a surface reinforcement, its percentage by weight is comprised between 0.5 and 2% by weight.
  • the method for producing this product is developed according to the following steps: All cellulose fibres formed by natural pulp fibres and short regenerated cellulose fibres are mixed with water in blenders, which are part of the paper machine.
  • the cellulose fibres are subjected to hydroentanglement, spraying high-pressure water jets thereon, which allows the fibres to be joined with knots, that will reinforce the bond between natural pulp fibres and short regenerated cellulose fibres, creating a solid paper structure, for handling same, but retaining the dispersibility properties.
  • the paper drying phase is carried out through a through air drying system, also called TAD or Through-Air Dryer.
  • TAD through air drying system
  • This drying system gives the paper a much greater thickness than any other conventionally dried paper.
  • natural pulp fibres may be subjected to refining to increase their fibrillation, creating greater bonds between them to achieve greater consistency of the product.
  • the natural pulp fibres refined according to the present invention would have a refinement level of between twelve and forty Shopper degrees (12°S to 40°S).
  • the paper obtained according to the present invention can reach a dispersion level of 90% according to the "Slosh box" Test, set forth in the INDA/EDANA guidelines under the FG502 trial; as well as in the Spanish standard UNE 149002, under the disintegration test with stricter conditions of time and acceptability criteria.
  • the "Slosh box” test has been carried out under the following parameters; 5 minutes /26 rpm/2L/ sieve 12.5mm.
  • the thickness of the product increases considerably (10 times greater than conventional paper for the same grammage), providing the material with an open and very breathable structure. This property is key for the proper functioning of the material as the core of the cigarette filter, where the air has to pass through the material without causing much pressure difference and avoid having to apply a great aspiration when smoking a cigarette.
  • Figure 1 shows, in a block diagram, how the method for producing the paper is performed for the production of dispersible cigarette filters that are the subject matter of the present invention.
  • the present invention relates to a paper preferably intended for forming the core of the filter of a cigarette to give it a dispersible nature and the method of producing this paper that could also be used to obtain the wrapping paper for that core of the filter or even both components, that is, the core and the surrounding paper.
  • composition of this paper consists of, at least ninety-three percent (93%) by weight cellulose fibres and between zero and seven percent (0 to 7%) by weight optionally applicable natural additives; such that the composition of this paper can be one hundred percent by weight cellulose fibres, without any additive, or have a weight of, at least ninety-three percent by weight cellulose fibres and the rest of the weight will be made up of natural additives.
  • Natural pulp fibres can be, as a non-limiting example, of the NBSK variant which is a sulphate bleached long fibre cellulose pulp.
  • Short regenerated cellulose fibres are known in the market as "Shortcut” and are specially developed short fibres that can be used as additives for wet non-wovens in the paper industry, for filters and in components for the automotive and construction sectors.
  • the short regenerated cellulose fibres could be rayon, also known in Europe as viscose, which is a manufactured and regenerated artificial cellulose fibre and/or Lyocell.
  • Lyocell is a biodegradable synthetic fibre, which may be referred to as a form of rayon. It consists of cellulose fibre, made from dissolving the pulp and then reconstituted by dry jet-wet spinning. It is commonly known as "Tencel”, as this is the Brand that developed it.
  • both rayon and Lyocell are 100% cellulose that is brought to a liquid or semi-liquid phase and subsequently extruded, pulling out threads that finally solidify, having specific diameter and length measurements.
  • the natural pulp fibres will have a length comprised between half and four millimetres (0.5 to 4 mm) and the short regenerated cellulose fibres will have lengths comprised between eight and twelve millimetres (8 to 12mm).
  • the product obtained has a high degree of liquid absorption, specifically water.
  • the product obtained according to the present invention does not contain any non-natural polymer, that is, no synthetic polymer and it does not contain chemical products in general, such as binding additives or chemical glues.
  • This together with specific fibre length ranges, the method for producing the product itself and other technical features that will be seen below, makes the absorption very high, reaching levels over 900%. Thanks to this property, the thus hydroentangled and bonded high-strength fibres, lose their bonds based on hydrogen bonds (which are destroyed in water) and therefore this network of fibres dissolves, giving the product the important property of instant dispersibility in water.
  • the degree of water absorption measured under the UNE-EN ISO 9073-6 test gives absorption values between 600% and 1200% absorption according to the ISO standard. Preferably the absorption values are between 700% and 900%, thus ensuring dispersions (according to Slosh box test) greater than 80% in less than 5 minutes.
  • a shears a circular stainless steel mesh; clips; a container for water and a stopwatch.
  • the operating method starts with the preparation of the sample, cutting five 10x10cm samples that are identified as test tubes.
  • the weight of the sample to be tested is taken, which is identified as (Ms) and the test tubes are hooked with the clips to the stainless steel mesh.
  • the inside of the container is filled until the water reaches a height of approximately 20mm and the test is verified, which consists of introducing the sample into the water without leaving air bubbles.
  • the sample is left submerged for one minute.
  • the sample is drained vertically for two minutes, with the least possible contact with the sample and without crushing it at any time.
  • the sample is weighed again, identifying this weight as (M H ).
  • decitex is the mass in grams per ten thousand metres of fibre.
  • regenerated cellulose fibre its density or linear mass will be comprised between zero point nine and two point four decitex (0.9 to 2.4 dtex).
  • Natural additives such as Carboxymethyl cellulose (CMC), different types of micro and nano cellulose, such as micro fibrillated cellulose (MFC) or starch can be optionally added in order to reinforce the bonds between fibres.
  • CMC Carboxymethyl cellulose
  • MFC micro fibrillated cellulose
  • starch can be optionally added in order to reinforce the bonds between fibres.
  • the natural additive that is in liquid state is sprayed through nozzles, being sprayed on the surface of the paper web, already semi-formed in the machine and before final winding.
  • the natural additive is added in mass to the dissolution of fibres in water, its percentage by weight is comprised between one and five percent (1 a 5 %).
  • the natural additive is added on the surface, as a surface reinforcement, its percentage by weight is comprised between zero point five and two percent (0.5 to 2 %).
  • the method for producing this product is developed according to the following main steps: All cellulose fibres formed by natural pulp fibres and short regenerated cellulose fibres are mixed with water in the corresponding blenders, to later reach the headbox of the paper machine.
  • the headbox of the paper machine is high dilution which allows the use of regenerated cellulose fibres.
  • the fibres suspended in water have a concentration of 0.05% by weight, compared to conventional headboxes which are at 4%. Thanks to this very high dilution, it is possible to work with long regenerated cellulose fibres comprised between 8 and 12 mm, which would not be possible in a normal dilution headbox.
  • Hydroentanglement is a well-known technique that consists of bonding the fibres with knots, spraying high-pressure water jets on them that will reinforce the bond between the natural pulp fibres and the short regenerated cellulose fibres, creating a solid paper structure, for handling same, but retaining the dispersibility properties, since the bonds created, which are based on hydrogen bonds, weaken in water, which will maintain the dispersibility property in the final product that are the filters of cigarettes once discarded and when these filters come into contact with the water in sewers, WC, the sea, rivers, etc.
  • the product does not incorporate any amount of non-natural polymers (synthetic polymers); in addition to not incorporating chemical binders or glues.
  • the hydro entanglement technology was officially introduced by the DuPont company, from Wilmington, Del., in 1973 and consists of subjecting the fibres to multiple rows of fine high-pressure water jets generated in nozzles called jet strips.
  • the paper machine has a series of high-pressure water jets (jet strips) to physically hydroentangle the paper, specifically, there is a row of continuous jets, preferably in a number comprised between five and ten jets, of which some are in the working phase and others in reserve function.
  • the water passes through perforated sheets called strips, with different hole configurations. Specifically and in relation to those holes, the following are defined: the number of rows of holes, the diameter of the holes, and the number of holes per unit area.
  • the paper drying step is carried out by a through air drying system, also called TAD or Through-Air Dryer.
  • the traditional method of drying paper is to first press it, before drying it using drying cylinders.
  • this TAD drying system using transverse air, dries the paper through a method without physical contact with the paper, using hot air that passes through the paper, after the sheet of paper has gone through the dewatering process in the fabric section.
  • the distribution of the fibres of the sheet of paper that has not been pressed is three-dimensional, so it has good air permeability.
  • the utilisation rate of the fibre can be improved by about 20%, and the water absorption capacity of the paper sheets processed using this method are much better than those treated with traditional methods.
  • the dust containment values of the paper sheets processed with this method are also improved and are much better than those treated with traditional methods.
  • This TAD drying system confers the paper a much greater thickness than any other paper dried in a more conventional way.
  • the specific application of the through air drying (TAD) system is carried out as follows: Hot air penetrates through the paper and that hot air is recovered, once it has gone through the paper, to be reinserted inside a drying cylinder.
  • the drying cylinders are perforated cylinders through which hot air exits and passes through the paper.
  • This TAD drying technology gives the paper a very high thickness, with the values previously outlined.
  • This thickness parameter is key, taking into account the final use of the paper that is intended for forming filters, in addition to having a low density and higher absorption levels, thanks to the three-dimensionality of the material.
  • this number of cylinders may vary, for example a smaller number when using larger cylinders, without thereby altering the essence of the invention in any way.
  • volume Thickness / Weight (cm3/g). With equal grams, thicker paper will logically have a greater volume.
  • this TAD drying system compared to a conventional drying system, achieves a "quire" of the paper that is multiplied by ten.
  • This aspect is very beneficial for a paper that is to be used in the production of filters, since it enables a filter to be made with much less product (fewer grams of paper per filter for equal square meters).
  • Natural pulp fibres may optionally be subjected to refining, to increase its fibrillation, creating greater bonds therebetween for product consistency. Refining is carried out using conical and/or disc refiners where the fibres flow parallel to the blade intersections. The first effect is the partial elimination of the primary wall of the fibres, leaving the secondary wall exposed, thus allowing hydration and flexibility of the fibre.
  • natural pulp fibres refined according to the present invention, would have a refinement level of between twelve and forty Shopper degrees (12°S and 40°S).
  • Figure 1 shows a flowchart formed by a block diagram that represents a work line with the different most important parts that allow the development of the method that is the subject matter of the present invention.
  • the numerical reference (1) identifies the paper machine itself with its different components included within the box represented by dashed lines.
  • a storage warehouse (2) a storage warehouse (2); packaging equipment (3); a rewinder (4); a natural pulp fibre tank (5); a regenerated cellulose fibre tank (6) and a general water tank (7).
  • the pulp is supplied from the natural pulp fibre tank (5) to a mixer (1.3), to which water is also supplied from the general tank (7).
  • the fibres are supplied from the regenerated cellulose fibre tank (6) to a mixer (1.1) to which water is also supplied from the general tank (7).
  • the mixture goes from the mixers (1.1) and (1.3) respectively to storage tanks (1.2) and (1.4), from which and through pumping means (1.5) the product is supplied to the headbox (1.6) of the paper machine (1) which has the particular feature of being a high-dilution input box.
  • the product passes from the high-dilution headbox (1.6) to the hydroentangler (1.8) where pressurised water jets perform the hydroentanglement of the fibres.
  • the drying phase take place which, as a particular feature of the present invention, is carried out using one or more through-air dryers (TAD), identified by the block with the number reference (1.9).
  • TAD through-air dryers
  • the sheet of paper thus formed passes to a winder (1.10) in which the winding of the sheet of paper is carried out, to form a large reel referred to as the "parent" reel.
  • the "parent” reel is taken to a rewinder (4), located outside the paper machine (1), where the "parent” reel is cut into smaller width sheets that are rewound into smaller diameter reels in order to be supplied to the final producer of the filters of the cigarettes; such that the "parent” reels are transformed into reels of smaller size and weight, with the required width and length measurements.
  • the material is supplied to the end customer in the form of a paper web arranged according to a reel that allows its transport, storage and handling, both in its transportation to the production lines, and once arranged on the production lines of the filters.
  • the smaller reels thus formed pass from the rewinder (4) to packaging equipment (3), where these smaller reels are duly wrapped, then going to a storage warehouse (2) where they will remain until they are sent to the final customer.
  • both the high-dilution headbox (1.6), and the hydroentangler (1.8) are connected to a tank for the excess water identified with the number reference (1.13).
  • This tank (1.13) for the excess water is connected to the general water tank (7).
  • the pump (1.5) in addition to sending product to the high-dilution headbox (1.6), also sends it to a storage silo referred to a "PIT" and identified with the number reference (1.12).
  • the product exiting the pump (1.5) can be sent from this silo (1.12) to the high-dilution headbox (1.6) if necessary during the process.
  • the storage silo (1.6) can receive water from the tank (1.13) when necessary.
  • additives are added in mass, they would preferably be incorporated into the tanks (1.2) and (1.4) respectively; while if they are added on the surface, they would be incorporated at the outlet of the hydroentangler (1.8) between same and the TAD drying step (1.9). These additives can be incorporated at other points according to the arrangement of the work line without altering the essence of the invention.
  • this refining would be carried out, preferably, at the outlet of the storage tank (1.4) of the mixture formed by natural pulp fibres and water, before this mixture accesses the pumping means (1.5).
  • This paper relates to the production of a paper, to make the core of the filter of a cigarette.
  • This paper is obtained from 85% long-fibre natural pulp fibre and 15% short regenerated cellulose fibre.
  • the Lyocell type was used as the short regenerated cellulose fibre, specifically the Lyocell from the "Tencel” Brand (Lenzing) with a length of 10 mm.
  • the natural pulp fibre was refined to reach the value of 25°S and mixed with the regenerated cellulose fibre, to subsequently introduce it into the paper machine.
  • a hydroentanglement was applied to this mixture of fibres already in the paper machine, which consists of 6 rows of water jet nozzles with pressures in bars from the first to the last row of: 35 bar / 35 bar / 40 barf 35 bar / 35 bar / 35 bar.
  • the paper obtained had a weight, expressed in grams per square metre, of 55 g/m 2 and a breaking strength expressed in Newton per centimetre of 30 N/5cm, reaching a dispersion level of 90% according to the "Slosh box" Test.
  • the dispersibility of the material was established under the "Slosh box” test, set forth in the INDA/EDANA guidelines under the FG502 trial; as well as in the Spanish standard UNE 149002, under the disintegration test with stricter conditions of time and acceptability criteria.
  • the "Slosh box” test was carried out under the following parameters; 5 minutes /26 rpm/2L/ sieve 12.5 mm).
  • the thickness of the product increases considerably (10 times greater than conventional paper for the same grammage), providing the material with an open and very breathable structure (high porosity between the "loose” structure of the fibres). This property is key for the proper functioning of the material, as a core of the cigarette filter, where the air has to pass through the material without causing much pressure difference and avoid having to apply a great aspiration when smoking a cigarette.
  • this paper in addition to being dispersible, is perfectly biodegradable and compostable in all environments, in accordance with the standard EN13432, passing all relevant tests.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Paper (AREA)
EP21954103.4A 2021-08-19 2021-08-19 Papier pour la fabrication de filtres jetables de cigarettes et procédé de fabrication de celui-ci Pending EP4388895A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/ES2021/070619 WO2023021227A1 (fr) 2021-08-19 2021-08-19 Papier pour la fabrication de filtres jetables de cigarettes et procédé de fabrication de celui-ci

Publications (1)

Publication Number Publication Date
EP4388895A1 true EP4388895A1 (fr) 2024-06-26

Family

ID=85240102

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21954103.4A Pending EP4388895A1 (fr) 2021-08-19 2021-08-19 Papier pour la fabrication de filtres jetables de cigarettes et procédé de fabrication de celui-ci

Country Status (2)

Country Link
EP (1) EP4388895A1 (fr)
WO (1) WO2023021227A1 (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW241198B (en) * 1993-09-06 1995-02-21 Daicel Chem A tobacco filter material and a method of producing the same
GB9412311D0 (en) 1994-06-20 1994-08-10 Courtaulds Fibres Holdings Ltd Filter materials
JPH09316420A (ja) * 1996-05-27 1997-12-09 Daicel Chem Ind Ltd 水溶性ホットメルト接着剤と、これを用いたたばこフィルター及びその製造方法
DE102012106801A1 (de) 2012-07-26 2014-01-30 Delfortgroup Ag In Wasser rasch zerfallendes Filterpapier
WO2015178995A1 (fr) * 2014-05-23 2015-11-26 Greenbutts Llc Mèche de filtre de cigarette biodégradable et son procédé de fabrication
EP2985375B1 (fr) 2014-08-12 2017-03-29 Glatfelter Gernsbach GmbH Tissu non tissé dispersible et son procédé de production
CN110652028A (zh) * 2018-06-29 2020-01-07 共青城道乐投资管理合伙企业（有限合伙） 干法再造烟叶、干法再造烟叶生产方法及设备
US20230016316A1 (en) 2019-12-13 2023-01-19 Delfortgroup Ag Hydro-Entangled Filter Material for Smoking Products

Also Published As

Publication number Publication date
WO2023021227A1 (fr) 2023-02-23

Similar Documents

Publication Publication Date Title
JP4746256B2 (ja) 使い捨て可能な不織ワイプ布とその製造方法
AU2009354046B2 (en) Flushable moist wipe or hygiene tissue
JP5785944B2 (ja) 水崩壊性繊維シート、前記繊維シートの製造方法、コアの製造における前記繊維シートの使用
US20170073863A1 (en) Dispersible non-woven fabrics
AU2014390093B2 (en) Flushable hydroentangled moist wipe or hygiene tissue
AU2001290859A1 (en) Disposable nonwoven wiping fabric and method of production
AU2014390092B2 (en) Method for producing a flushable hydroentangled moist wipe or hygiene tissue
AU2014343311B2 (en) Dispersible moist wipe
CN110558609A (zh) 烟草烟雾过滤器
AU2015400338B2 (en) Dispersible moist wipe and method of making
EP3063324B1 (fr) Procédé de fabrication d'un chiffon humide dispersible
CN112204185A (zh) 纤维非织造网
TWI526589B (zh) Preparation method of hydrolyzable fiber sheet
EP4388895A1 (fr) Papier pour la fabrication de filtres jetables de cigarettes et procédé de fabrication de celui-ci
WO2016200299A1 (fr) Lingette ou papier hygiénique humide hydroenchevêtré(e) désintégrable et son procédé de production
Tipper Flushability of nonwoven wet wipes
Harter et al. How Flushable Wet Wipes Are Causing Sewer Blockages–and An Approach to Prevent That
WO2024013645A1 (fr) Etoffe non tissée et procédé pour sa fabrication

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20240314

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR