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WO2023021227A1 - 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

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Publication number
WO2023021227A1
WO2023021227A1 PCT/ES2021/070619 ES2021070619W WO2023021227A1 WO 2023021227 A1 WO2023021227 A1 WO 2023021227A1 ES 2021070619 W ES2021070619 W ES 2021070619W WO 2023021227 A1 WO2023021227 A1 WO 2023021227A1
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WO
WIPO (PCT)
Prior art keywords
paper
natural
fibers
dispersible
filters
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.)
Ceased
Application number
PCT/ES2021/070619
Other languages
English (en)
Spanish (es)
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
Priority to EP21954103.4A priority Critical patent/EP4388895A4/fr
Priority to PCT/ES2021/070619 priority patent/WO2023021227A1/fr
Publication of WO2023021227A1 publication Critical patent/WO2023021227A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • D21H11/14—Secondary fibres
    • 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
    • D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
    • D21H13/02—Synthetic cellulose fibres
    • D21H13/08—Synthetic cellulose fibres from regenerated cellulose
    • 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
    • D21H15/00—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution
    • D21H15/02—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution characterised by configuration
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24—Polysaccharides
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24—Polysaccharides
    • D21H17/25—Cellulose
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24—Polysaccharides
    • D21H17/28—Starch
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/54—Starch
    • 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/18—Reinforcing agents
    • 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
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/50—Spraying or projecting
    • 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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes

Definitions

  • the present invention is related to the industry dedicated to the manufacture of cigarettes, proposing a paper intended for the manufacture of a cigarette filter and, preferably, for the manufacture of its core, as well as the manufacturing method of this paper; in such a way that it provides the filter with a condition of dispersibility in water, added to the condition of biodegradability.
  • the filters are made with normal machine paper of greater or lesser weight.
  • the paper used is part cellulose, normally long-fiber, to which chemical products are added that give the filter flavor, which affect its proper functioning as such a filter and, above all, if Although they provide the biodegradability condition, they do not provide the filter with the dispersibility condition.
  • biodegradable filters behave like an apple that, being biodegradable, is not dispersible and if it is flushed down the toilet it gets clogged.
  • the lack of the dispersibility condition in cigarette filters also translates into serious environmental problems, in places such as beaches, riverbanks and swamps, etc.
  • the European Patent EP2985375 of Glatfelter has as its object a dispersible non-woven fabric but applicable expressly for the manufacture of what is known as wipes and not for its use in the manufacture of cigarette filters.
  • a filter made of at least 95% by weight of pulp fibers is proposed. Of these pulp fibers from 0 to 90% is mercerized pulp and the rest is long fiber pulp.
  • Mercerized pulp is made by treating cotton fiber 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 fiber.
  • cotton fibers even though they are cellulosic, are already less biodegradable than natural long-staple pulp fibers and are more difficult to produce for the paper industry, in a short-staple version.
  • a cigarette filter material made up of a hydroentangled non-woven fabric, made up of wood pulp fibers, fibers made of regenerated cellulose and non-natural polymers, indicating that, to ensure good biodegradability, it must contain less than 30% unnatural polymers.
  • the object of the present invention is that the cigarette filter is, in addition to being biodegradable, dispersible and dispersibility is the main goal; so that for this, the material that constitutes it cannot incorporate any amount of non-natural polymers (synthetic polymers).
  • the incorporation of a non-natural polymer or chemical products in general, such as binder or chemical sizing additives, would go directly against its dispersibility, so this solution proposed by PCT number W02021115619A1, even if it contains less than 30% of non-natural polymers , even if the amount were minimal, being unnatural would prevent the filter from being dispersible.
  • a solution is necessary that allows obtaining a paper to manufacture cigarette filters that, in addition to its biodegradable condition, adds that of dispersible, offering that enough strength paper without adding any binder or chemical glue at all, all made from cellulosic fibers and physically linked through mechanical means.
  • the present invention provides a paper for the manufacture of a cigarette filter and the manufacturing method of this paper that can be made entirely with cellulosic fibers, of which between 70 and 90% by weight are fibers. natural, virgin or recycled pulp, with a length between 0.5 and 4mm; while between 10 and 30% by weight are low-length regenerated cellulose fibers, with the particularity that this regenerated cellulose fiber, which is normally a fiber of the order of 38mm, is now cut into even smaller pieces, in a measure between 8 and 12 mm.
  • the product obtained has a high degree of liquid absorption, specifically water.
  • this is achieved, because the product obtained according to the present invention does not contain any non-natural polymer, that is, any synthetic polymer, and it does not contain chemical products in general, such as binder or chemical sizing additives.
  • This together with the specific length ranges of the fibers, the manufacturing method of the product itself and other technical characteristics that will be seen in detail later, makes the absorption very high, reaching levels above 900%.
  • the paper object of the present invention can be manufactured in a composition in which 100% of its weight is cellulosic fibers made up of the mixture of natural pulp fibers and low length regenerated cellulose fibers, but optionally and as reinforcement of the bonds between fibers, additives can also be added, as long as they are natural. These natural additives can be added in bulk and/or on the surface. If the natural additive is added by mass to the solution of fibers in water, its percentage by weight is between 1 and 5% of the total weight of the product; while, if it is added on the surface, as a surface reinforcement, its percentage by weight is between 0.5 and 2% by weight.
  • All cellulosic fibers made up of natural pulp fibers and low-length regenerated cellulose fibers are mixed with water in mixers, which are part of the paper machine.
  • the cellulosic fibers will be subjected to an entangled hydra, projecting high-pressure water jets on them, which allows the fibers to be joined with knots, which will reinforce the union between the natural pulp fibers and the cellulose fibers. low length regenerated, creating a solid paper structure, for handling, but retaining dispersibility properties.
  • TAD transverse air drying system
  • the natural pulp fibers may be subjected to refining to increase their fibrillation, creating greater bonds between them to achieve greater product consistency.
  • the natural pulp fibers refined according to the present invention would have a level of refinement between twelve and forty degrees Shopper (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, included in the INDA/EDANA guidelines under the FG502 test; as well as in the Spanish standard UNE 149002, under the disintegration test with stricter time conditions and acceptability criteria.
  • the thickness of the product increases considerably (10 times greater than conventional paper for the same grammage), giving the material an open and very breathable. This property is key to 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 difference in pressure and avoiding having to apply a great aspiration while smoking the cigarette.
  • Figure 1 shows, in a block diagram, how the paper manufacturing method for the manufacture of dispersible cigarette filters object of the present invention is developed.
  • the present invention refers to a paper preferably intended for shaping the core of the filter of a cigarette to give it a dispersible character and the manufacturing method of this paper that could also be used to obtain the wrapping paper for that core of the filter or including both components, ie the core and the wrapping paper.
  • composition of this paper consists of at least ninety-three percent (93%) by weight of cellulosic fibers and between zero and seven percent (0 to 7%) by weight of optionally applied natural additives; so that the composition of this paper can be one hundred percent by weight of cellulosic fibers, without any additive, or have a weight of at least ninety-three percent by weight of cellulosic fibers and the rest of the weight be made up of by natural additives.
  • cellulosic fibers between seventy and ninety percent by weight (70% to 90%), will consist of virgin or recycled natural pulp fibers and between ten and one Thirty percent by weight (10 to 30%), will consist of low length regenerated cellulose fibers.
  • the natural pulp fibers can be, as a non-limiting example, of the NBSK variant, which is a long-fiber pulp bleached with sulfate.
  • Low length regenerated cellulose fibers are known in the market as "Shortcut” and are specially developed short fibers that can be used as additives, for wet-process nonwovens in the paper industry, for filters and as components for automotive and construction sectors.
  • the low-length regenerated cellulose fibers can be rayon, also known in Europe as viscose, which is a manufactured and regenerated cellulosic artificial fiber, and/or Lyocell.
  • Lyocell is a biodegradable synthetic fiber, being able to say that it is a form of rayon. It consists of cellulose fiber, made from the dissolution of the pulp and then reconstituted by dry spinning by water jet. 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, removing threads that finally solidify, presenting specific diameter and length measurements.
  • the natural pulp fibers will have a length of between half and four millimeters (0.5 to 4mm.) and the low-length regenerated cellulose fibers will have lengths of between eight and twelve millimeters (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, any synthetic polymer, and it does not contain chemical products in general, such as binder or chemical sizing additives.
  • This together with specific length ranges of the fibers, the actual manufacturing method of the product and other technical characteristics that will be seen below, makes the absorption very high, reaching levels above 900%. Thanks to this property, the hydra fibers entangled and bound in this way with high resistance, lose their bonds based on hydrogen bonds (which are destroyed in water) and therefore this network of fibers 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.
  • the operational method starts from the preparation of the sample, cutting 5 10x10cm samples that are identified as test tubes.
  • the bowl is filled until the water reaches a height of about 20mm. approximately and proceed to verify the test, consisting of introducing the sample into the water without leaving air bubbles.
  • the sample is expected to remain submerged for one minute.
  • the sample is allowed to drain vertically for two minutes, with as little contact as possible with the sample and without crushing it at any time.
  • the sample is weighed again, identifying this weight as (M H ).
  • the density or linear mass of these cellulosic fibers measured in decitex (dtex) which is the mass in grams per ten thousand meters of fiber, is as follows:
  • the grammage and thickness values are adjusted so that the density is between 10 and 99 Kg/m 3 .
  • Natural additives such as carboxymethyl cellulose (CMC), different types of micro and nano cellulose, such as micro fibrillated cellulose (MFC) or starch can optionally be added to reinforce the bonds between fibers.
  • CMC carboxymethyl cellulose
  • MFC micro fibrillated cellulose
  • starch can optionally be added to reinforce the bonds between fibers.
  • the natural additive is added into storage tanks that are located at the outlets of large mixing containers called "pulper", where the dry cellulosic fibers have been introduced, to mix them with water; so that this mixture is the one that will finally go to the paper machine, where the mixture of water and fibers is placed on a long conveyor table and, then, the water is removed by various procedures: gravity, vacuum, pressure and/or drying. And finally a sheet of paper is obtained, which is rolled up to form a reel.
  • pulper large mixing containers
  • the natural additive that is in a liquid state is pulverized (spray) through some nozzles, spraying it on the surface of the paper web, already semi-formed in the machine and before its final winding.
  • the natural additive is added by mass to the solution of fibers in water, its percentage by weight is between one and five percent (1 to 5%).
  • the natural additive is added on the surface, as a surface reinforcement, its percentage by weight is between zero with five and two percent (0.5 to 2%).
  • the manufacturing method of this product is carried out according to the following main stages: All the cellulosic fibers made up of natural pulp fibers plus low-length regenerated cellulose fibers are mixed with water in the corresponding beaters, to subsequently reach the input box of the paper machine.
  • the headbox of the paper machine is of high dilution, which allows the use of regenerated cellulose fibers.
  • the fibers suspended in water have a concentration of 0.05% by weight, compared to conventional headboxes that are at 4%. Thanks to this very high dilution, it is possible to work with regenerated cellulose fibers of high lengths between 8 and 12mm, something that would not be possible in a normal dilution headbox.
  • Hydroentangling is a well-known technique that consists of joining the fibers with knots, projecting high-pressure water jets onto them that will reinforce the union between the natural pulp fibers and the short-length regenerated cellulose fibers, creating a structure of solid paper, for its handling, but preserving the dispersibility properties, since the unions created, based on hydrogen bonds, are weakened in the water, which will maintain the dispersibility property in the final product, which are the filters. cigarettes once discarded and when these filters come into contact with water in sewers, toilets, the sea, rivers, etc.
  • the product does not incorporate any amount of non-natural polymers (synthetic polymers); in addition to not incorporating binders or chemical glues.
  • Hydro entanglement technology was officially introduced by DuPont, Wilmington, Del., in 1973 and involves subjecting fibers to multiple rows of fine, high-pressure water jets generated from nozzles called "jet strips.”
  • a battery of high-pressure water jets (jet strips) is available in the paper machine to physically entangle the paper, specifically a row of jets is available in continuous, preferably in a number between five and ten jets, some of which are in the working phase and others in reserve.
  • strips perforated sheets
  • holes perforated sheets
  • the following are defined: the number of rows of holes, the diameter of the holes, and the number of holes per surface unit.
  • the paper drying phase is carried out through a transverse air drying system, also called TAD, for its acronym in English (Through-Air Dryer).
  • TAD transverse air drying system
  • the traditional method of drying paper is by first pressing it, before drying it using drying cylinders.
  • this TAD drying system by transverse air, the paper is dried through a method without physical contact with the paper, using hot air that passes through the paper, after the sheet of paper has passed the process of dewatering in the cloth section.
  • the distribution of the fibers of the sheet of paper that has not been pressed is three-dimensional, so it has good air permeability.
  • the fiber utilization rate can be improved in the order of 20%, and the water absorption capacity of paper sheets processed with this method are much better than those treated with traditional methods.
  • the dust containment values of the sheets of paper processed with this method are also improved, which are much better than those treated with traditional methods.
  • TAD transverse air drying system
  • Hot air is made to penetrate through the paper and this hot air is recovered, once it has passed through the paper, to be reinserted inside a drying cylinder.
  • Drying cylinders are perforated cylinders through whose holes the hot air passes through the paper.
  • This TAD drying technology gives the paper a very thick thickness, with the previously mentioned values.
  • This thickness parameter is key, taking into account The final use of the paper, which is destined for the conformation of filters, counts, in addition to presenting a low density and higher levels of absorption, thanks to the three-dimensionality of the material.
  • TAD drying cylinders are preferably arranged, arranged one after the other in correlation, so as to achieve a large drying capacity, which allows the machine to be given a higher speed.
  • this number of cylinders can vary, for example by a smaller number, when using larger cylinders, without thereby altering the essence of the invention in any way.
  • volume Thickness / Weight (cm3/g). For the same grams, a thicker paper will logically occupy a greater volume.
  • the natural pulp fibers may be subjected to refining, to increase their fibrillation, creating greater links between them for the consistency of the product.
  • the refining is carried out by means of conical and/or disc refiners where the fibers flow parallel to the crossings of the blades.
  • the first effect is the partial removal of the primary wall of the fibers, exposing the secondary wall thus allowing hydration and flexibility of the fiber.
  • the natural pulp fibers, refined according to the present invention would have a level of refinement between twelve and forty degrees Shopper (12°S and 40°S).
  • Figure 1 shows a flowchart made up of a block scheme that represents a line of work with the different most important parts that allow the development of the project. method object of the present invention.
  • Numerical reference (1) identifies the paper machine itself with its different components included within the box represented by dashes.
  • a storage warehouse (2) a packing equipment (3); a rewinder (4); a deposit of natural pulp fibers (5); a regenerated cellulose fiber tank (6) and a general water tank (7).
  • the pulp is supplied to a beater (1.3), which also receives water from the general tank (7).
  • a beater (1,1) which also receives water from the general tank (7).
  • the mixture passes respectively to respective storage tanks (1.2) and (1.4), from which and through pumping means (1.5) the product is delivered to the box of inlet (1.6) of the paper machine (1) which has the particularity of being a high dilution inlet box.
  • the product goes to the hydroentangler (1.8) where pressurized water jets hydroentangle the fibers.
  • the drying phase is carried out which, as a particularity of the present invention, is carried out by means of one or more transverse air dryers (TAD), identified by the block of numerical reference (1.9).
  • TAD transverse air dryers
  • the sheet of paper thus shaped passes to a winder (1.10) in which the winding of the sheet of paper is carried out, to form a large coil called the "mother" coil.
  • the "mother” reel is taken to a rewinder (4), located outside the paper machine (1), where the "mother” coil is cut into sheets of lesser width that are rewound into smaller diameter coils, in order to be supplied to the final manufacturer of cigarette filters; so that the "mother” coils they are transformed into coils of smaller size and weight, with the required width and length measurements.
  • the material is supplied to the final customer in the form of a web of paper arranged in a reel that allows its transport, storage and handling, both during its transport to the manufacturing lines, and once it is arranged on the manufacturing lines. of the filters.
  • both the high dilution inlet box (1.6) and the hydra entanglement (1.8) are related to a deposit for excess water identified with the numerical 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 inlet box (1.6), also sends it to a storage silo called "PIT and identified with the numerical reference (1.12). From this silo (1.12) the product that comes out of the pump (1.5) can thus be sent to the high dilution inlet box (1.6) if necessary during the process.
  • the storage silo (1.6) can receive water from the tank (1.13) when necessary.
  • additives In the event that it is desired to add a natural additive or additives, if the additives are added or added in mass, they would preferably be incorporated into deposits (1.2) and (1.4) respectively; while if it is added or added on the surface, they would be incorporated at the exit of the entangling hydra (1.8) between this and the TAD drying stage (1.9). These additives can be incorporated at other points depending on the layout of the line of work without altering the essence of the invention. On the other hand, and in the case of wanting to carry out a refining of the natural pulp fibers, this refining would preferably be carried out at the outlet of the storage tank (1.4) of the mixture formed by the natural pulp fibers and the water, before accessing this mixture to the pumping means (1.5).
  • This paper is obtained from 85% long-staple natural pulp fiber and 15% low-length regenerated cellulose fiber.
  • the Lyocell type As low length regenerated cellulose fiber, the Lyocell type was used, specifically that of the "Tencel” brand (Lenzing) with a length of 10mm.
  • the natural pulp fiber was refined until reaching the value of 25°S and mixed with the regenerated cellulose fiber, to later introduce it into the paper machine.
  • an entangled hydra was applied consisting of 6 rows of water jet nozzles with pressures in bars from the first to the last row of: 35bar / 35barZ 40barZ 35barZ 35bar Z35bar.
  • the paper obtained had a grammage, expressed in grams per square meter, of 55gZm 2 and a breaking strength expressed in Newton per centimeter of 30NZ5cm, reaching a dispersion level of 90% according to the "Slosh box" Test.
  • the dispersibility of the material was established under the “Slosh box” Test, included in the INDAZEDANA guidelines under the FG502 test; as well as in the Spanish standard UNE 149002, under the disintegration test with stricter time conditions and acceptability criteria.
  • the "Slosh box” test was carried out under the following parameters; 5 minutes Z26 rpmZ2LZ sieve 12.5mm). Thanks to the technology, first of refining the natural pulp fiber and second of the entangled hydra of the mixture of fibers, it has been possible to reinforce the union between the cellulosic fibers, reaching very high resistances of the final product, without compromising the dispersibility, since these unions (hydrogen bonds) are greatly weakened in the aqueous state.
  • the resistances achieved in different compositions can range from 20N/5cm to 60N/5cm, always keeping dispersions in "Slosh box", in a 5-minute test, greater than 80%.
  • the thickness of the product increases considerably (10 times greater than conventional paper for the same grammage), giving the material an open and very breathable (high porosity between the "loosely packed” structure of the fibers).
  • This property is key to 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 difference in pressure and avoiding having to apply great aspiration while smoking the cigarette.
  • this paper in addition to being dispersible, is perfectly biodegradable and compostable in all environments, in accordance with the EN 13432 standard, passing all relevant tests.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Paper (AREA)

Abstract

L'invention concerne un papier pour la fabrication de filtres jetables de cigarettes et son procédé de production. Le papier se compose, d'au moins quatre-vingt-treize pourcent (93%) en poids de fibres cellulosiques et entre zéro et sept pourcent (0 à 7%) en poids d'additifs naturels à utilisation facultative. Quant aux fibres cellulosiques, entre soixante-dix et quatre-vingt-dix pourcent en poids (70 à 90%) constituent des fibres de pulpe naturelles, vierges ou recyclées, et entre dix et trente pourcent en poids (10 à 30%) constituent des fibres de cellulose régénérée de petite longueur. Les fibres de pulpe naturelles présentent une longueur comprise entre zéro virgule cinq et quatre millimètres (0,5 à 4 mm) et les fibres de cellulose régénérée de petite longueur présentent une longueur comprise entre huit et douze millimètres (8 à 12 mm). La densité des fibres de pulpe naturelles est comprise entre un et deux decitex (1 à 2 dtex) ; tandis que la densité de la fibre de cellulose régénérée est comprise entre zéro virgule neuf et deux virgule quatre decitex (0,9 à 2,4dtex) et la densité du produit final est comprise entre 10 et 99 Kg/m3, atteignant des résistances qui vont de 20N/5cm jusqu'à 60N/5cm. Le papier ainsi obtenu ne contient aucun polymère non naturel ni de produits chimiques en général et le degré d'absorption de l'eau mesuré suivant l'essai UNE-EN ISO 9073-6 donne des valeurs d'absorption comprises entre 600% et 1200% selon la norme ISO et, de préférence, entre 700% et 900%, garantissant ainsi des dispersions (selon "test Slosh box") supérieures à 80% en moins de 5 minutes. Le procédé pour la production de ce papier consiste en ce que toutes les fibres cellulosiques constituées de fibres de pulpe naturelles en plus des fibres de cellulose régénérée de petite longueur sont mélangées à de l'eau pour passer ensuite au caisson d'entrée (1.6) de la machine à papier (1) à haute dilution et être soumises à une phase ultérieure d'hydro-enchevêtrement (1.8), après laquelle elles passent à la phase de séchage du papier effectuée par un système de séchage (1.9) à air transversal TAD (Through-Air Dryer). .
PCT/ES2021/070619 2021-08-19 2021-08-19 Papier pour la fabrication de filtres jetables de cigarettes et procédé de fabrication de celui-ci Ceased WO2023021227A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP21954103.4A EP4388895A4 (fr) 2021-08-19 2021-08-19 Papier pour la fabrication de filtres jetables de cigarettes et procédé de fabrication de celui-ci
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

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)

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WO2023021227A1 true WO2023021227A1 (fr) 2023-02-23

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PCT/ES2021/070619 Ceased WO2023021227A1 (fr) 2021-08-19 2021-08-19 Papier pour la fabrication de filtres jetables de cigarettes et procédé de fabrication de celui-ci

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WO (1) WO2023021227A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995035044A1 (fr) 1994-06-20 1995-12-28 Courtaulds Fibres (Holdings) Limited Materiaux filtrants pour cigarettes
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
US5967149A (en) * 1993-09-06 1999-10-19 Daicel Chemical Industries, Ltd Tobacco filter material and a method of producing the same
EP2761085A1 (fr) 2012-07-26 2014-08-06 delfortgroup AG Papier filtre se désagrégeant rapidement dans l'eau
EP2985375A1 (fr) 2014-08-12 2016-02-17 Glatfelter Gernsbach GmbH Tissu non tissé dispersible et son procédé de production
US20170258128A1 (en) * 2014-05-23 2017-09-14 Greenbutts Llc Biodegradable cigarette filter tow and method of manufacture
EP3586649A1 (fr) * 2018-06-29 2020-01-01 Gongqingcheng Daole Investment Management Partnership (LLP) Feuille de tabac reconstituée par voie sèche, procédé et dispositif de production de feuille de tabac reconstituée par voie sèche
WO2021115619A1 (fr) 2019-12-13 2021-06-17 Delfortgroup Ag Matériau filtrant hydroenchevêtré pour produits à fumer

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2525363B (en) * 2014-05-23 2016-10-19 Greenbutts Llc Biodegradable cigarette filter tow and method of manufacture

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5967149A (en) * 1993-09-06 1999-10-19 Daicel Chemical Industries, Ltd Tobacco filter material and a method of producing the same
WO1995035044A1 (fr) 1994-06-20 1995-12-28 Courtaulds Fibres (Holdings) Limited Materiaux filtrants pour cigarettes
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
EP2761085A1 (fr) 2012-07-26 2014-08-06 delfortgroup AG Papier filtre se désagrégeant rapidement dans l'eau
US20170258128A1 (en) * 2014-05-23 2017-09-14 Greenbutts Llc Biodegradable cigarette filter tow and method of manufacture
EP2985375A1 (fr) 2014-08-12 2016-02-17 Glatfelter Gernsbach GmbH Tissu non tissé dispersible et son procédé de production
EP3586649A1 (fr) * 2018-06-29 2020-01-01 Gongqingcheng Daole Investment Management Partnership (LLP) Feuille de tabac reconstituée par voie sèche, procédé et dispositif de production de feuille de tabac reconstituée par voie sèche
WO2021115619A1 (fr) 2019-12-13 2021-06-17 Delfortgroup Ag Matériau filtrant hydroenchevêtré pour produits à fumer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4388895A4

Also Published As

Publication number Publication date
EP4388895A1 (fr) 2024-06-26
EP4388895A4 (fr) 2025-06-25

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