EP4695459A1 - Matériau en feuille comprenant des fibres cellulosiques régénérées disposées dans au moins une couche non tissée - Google Patents

Matériau en feuille comprenant des fibres cellulosiques régénérées disposées dans au moins une couche non tissée

Info

Publication number
EP4695459A1
EP4695459A1 EP24714527.9A EP24714527A EP4695459A1 EP 4695459 A1 EP4695459 A1 EP 4695459A1 EP 24714527 A EP24714527 A EP 24714527A EP 4695459 A1 EP4695459 A1 EP 4695459A1
Authority
EP
European Patent Office
Prior art keywords
sheet material
nonwoven layer
nonwoven
wipe
thickness
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
EP24714527.9A
Other languages
German (de)
English (en)
Inventor
Katharina Gregorich
Anna-Sophie FISCHER
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.)
Lenzing AG
Original Assignee
Lenzing AG
Chemiefaser Lenzing AG
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 Lenzing AG, Chemiefaser Lenzing AG filed Critical Lenzing AG
Publication of EP4695459A1 publication Critical patent/EP4695459A1/fr
Pending legal-status Critical Current

Links

Classifications

    • 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
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/013—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
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
    • 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
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • 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
    • D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length
    • D04H5/02—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by mechanical methods, e.g. needling
    • D04H5/03—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by mechanical methods, e.g. needling by fluid jet

Definitions

  • Sheet material comprising cellulosic regenerated fibers arranged in at least one nonwoven layer
  • the present disclosure relates to a sheet material comprising cellulosic regenerated fibers arranged in at least one nonwoven layer, methods for producing such a material, and uses of such material.
  • nonwoven materials can either be produced from staple fibers or by a direct-forming process, wherein the nonwoven layer consists endlessly produced fibers that have been deposited and collected on a conveyor belt in a random orientation.
  • a fleece is formed by carding the fibers and then use hydroentanglement (or spunlacing) for bonding the fibers.
  • This technique is usually referred to as “carded- spunlace” and is very well known to the person skilled in the art.
  • Direct-forming techniques are also known under the term “spunbonding”.
  • the term “spunbonding” is a generic term encompassing all direct-forming techniques such as “meltblown” or “solution-blown”. In the following paragraphs the main features of these techniques are described. In the present disclosure the terms “spunbond”, “meltblown” and “solution-blown” are used as defined in the following paragraphs. Nonetheless, it has to be understood that these terms are not being used consistently in the literature and are often confused or used in a different meaning or used synonymously.
  • Synthetic spunbond nonwovens are produced by the extrusion of plastic melts through a spinneret.
  • the filaments are extruded through a nozzle and pulled off and drawn by a drawing unit located underneath.
  • a similar process is the meltblown process (e.g., US5,080,569A, US4,380,570A or US5,695,377A), wherein the extruded filaments are entrained and drawn by hot, fast process air as soon as they exit the spinneret nozzle.
  • the filaments are deposited in a random orientation on a deposit surface, for example, a conveyor belt, to form a nonwoven fabric, are carried to postprocessing steps and finally wound up as nonwoven rolls.
  • the directly formed nonwovens produced from plastic melts according to the aforementioned processes can be produced with very low basis weights, for example of 10 g/m 2 , and with high tensile strengths.
  • nonwoven fabrics generally have insufficient absorption properties for applications in which absorbency plays a role.
  • nonwoven fabrics are biodegradable to a small extent or not at all.
  • an absorbent nonwoven product in which pulp fibers are present in a state of homogeneous distribution across a synthetic polyolefin fibre matrix.
  • Such products also suffer from their incomplete biodegradability.
  • a spunbonding process that can be used for cellulosic materials is the solution-blown technology, which is, for example, disclosed in US6358461A and US6306334A.
  • a cellulosic spinning mass especially a lyocell spinning mass, is thereby extruded and drawn by an air stream similar to the meltblown process.
  • the filaments prior to the deposition into a nonwoven, the filaments are additionally brought into contact with a coagulant in order to regenerate the cellulose and produce dimensionally stable filaments.
  • the wet filaments are finally deposited in a random orientation as a nonwoven layer.
  • the solution-blown technique has only little in common with the classic spunbond or meltblown processes for plastic melts, as initially described.
  • the lyocell spinning mass is a solution with a cellulose content of only 7-14%. Therefore, not only the fibre-forming cellulose, but also an even larger amount of solvent is extruded during the solution-blown manufacture. The solvent is then extracted from the nonwoven and recovered in a subsequent washing step.
  • WO2021170610 discloses a composite nonwoven fabric comprising at least one spunbonded cellulosic nonwoven produced according to the solution-blown technique and at least one layer of biobased biodegradable short fibers.
  • JP6267913B2 discloses a solution-blown nonwoven material produced according to the cuprammonium-process.
  • the nonwovens according to the state of the art are produced to have a high porosity combined with a pore geometry that supports a high liquid uptake.
  • Cellulosic fibers generally improve the liquid uptake properties of a nonwoven material.
  • a high bulkiness is preferred to improve the liquid uptake. Only with a sufficiently high liquid uptake it can be guaranteed that during use a sufficient amount of liquid can be released. Nonetheless, a high amount of fluid cannot be released, but is retained within the nonwoven structure and will be disposed as waste together with the product after use.
  • the present disclosure relates to a sheet material comprising cellulosic regenerated fibers arranged in at least one nonwoven layer, wherein the sheet material comprises at least one nonwoven layer of a cellulosic web manufactured with endlessly produced filaments, particularly produced by spunbonding, preferably by a solution- blown technique, wherein the sheet material has a basis weight between 40 g/m 2 and 70 g/m 2 , preferably between 50 g/m 2 and 60 g/m 2 , a liquid absorptive capacity of less then 900%, preferably less than 800% and even more preferred less than 700%, and a lotion release value of more than 4%, preferably more than 4.5 % and most preferably more than 5%.
  • endlessly produced filaments denotes filaments that have been produced or fed to the production unit of the nonwoven layer in an unintermitted way, e.g. by continuous extrusion through a spinneret, and that have not been subjected to any deliberate cutting process before forming the nonwoven layer.
  • a cellulosic nonwoven layer produced by spunbonding, preferably by a solution- blown technique, allows for a very fine and target-oriented adaption of the production parameters to produce a nonwoven layer according to the preferences disclosed herein.
  • spunbonding denotes any process of directly forming nonwoven layers from endlessly produced filaments.
  • solution blown denotes a process for forming a nonwoven layer from a cellulosic spinning dope, especially a lyocell spinning dope.
  • the spinning dope is thereby extruded to form filaments in an endless manner and the filaments are drawn by an air stream and then at least partly coagulated by a coagulant before being deposited on a deposit surface in a random orientation for form the nonwoven layer.
  • the inventors have surprisingly found that according to the teachings disclosed herein it is possible to reduce the liquid absorptive capacity of a nonwoven material while, at the same time, the lotion rewet value of the same nonwoven material can be increased. This overcomes the common presumption that for increasing the lotion release it is obligatory to also increase the liquid absorptive capacity so that the nonwoven material can be loaded with more liquid.
  • the present invention allows for an overall reduction of lotion that is required for the desired lotion release. As the lotion is a main cost driver for many fluid-laden nonwoven products, a significant cost reduction can be realized according to the present disclosure.
  • nonwoven layer refers to a flat nonwoven structure produced according to any process known in the art, specifically produced according to any process described or referred to in the present disclosure.
  • sheet material refers to a product comprising (or consisting of) one or more nonwoven layer(s).
  • BW basic weight
  • liquid absorptive capacity refers to the value as it can be measured according to NWSP 010.1.
  • RO (15) [EN] refers to the value as it can be measured according to NWSP 010.1.
  • the lotion release value can be measured with a roller pressing test according to the following protocol: From the sheet material 10 samples with a size of 20 cm x 20 cm are cut out.
  • Each sample is weighted to determine the weight of the unloaded sample.
  • the samples are carefully loaded 3-fold with demineralized water by spraying.
  • the term “3-fold” means that the weight of the loading fluid (i.e. demineralized water) corresponds to three times the weight of the unloaded sample.
  • Staples of 5 samples each are then sealed in a pouch and stored for two days at ambient temperature to allow equalizing and swelling of the fibers.
  • the samples are unpacked and weighted separately to determine the weight of the loaded sample (WLS).
  • Liquid is then squeezed out by horizontally passing each sample through a roller-press set to a roller speed of 3 m/min and a pressure of 0.5 bar.
  • the samples are passed through the roller-press in the machine direction of the sample material.
  • Each sample is weighted again after squeezing to determine the weight of the squeezed sample (WSS).
  • roller press having a roller diameter of 110 mm and a roller length of 500 mm, e.g. a roller press of the type Foulard HVF 50041796, can be used, but the same measurement result can also be achieved by the use of an equivalent roller press.
  • roller pressing test disclosed herein very well reflects the ability of the sheet material to set free an amount of fluid during use.
  • test protocol is simple and easy to perform it is evident from the application that the skilled person would face no difficulty in carrying out the presented test and would thereby be able to establish the exact meaning of the parameter and to make a meaningful comparison with the prior art.
  • Spunbonding allows for a very precise and reproducible adaption of the properties, especially the thickness of the filaments and the structure and distribution of the pores can be very easily adjusted over a broad range.
  • the solution-blown technique offers the possibility of adjusting the amount of merging that is allowed to occur between the different filaments when they are deposited on the deposit surface. Merging occurs if the nonwoven layer is formed while the filaments are still in a not yet fully coagulated state. Practically, the amount of merging is manly adjusted by an adjustment of the amount of coagulation fluid that is applied to the freshly spun filaments in-between the spinneret and the fleece-forming unit (i.e. the moving support onto which the filaments are laid). Additionally, the diameter and/or diameter distribution of the filaments can be adjusted by the spinneret dimensions, spinneret hole diameters, spinning dope flow rate, drawing-air flow and coagulation spray intensity.
  • the liquid absorptive capacity should be at least 300% (for a material with a basis weight of about 50 g/m 2 ) .
  • the lotion release value should be as high as possible. It is believed that a lotion release value of up to 12% or even more could be achieved.
  • the sheet can have a thickness between 0,35 mm and 0,6 mm, preferably between 0,4 and 0,5 mm.
  • a thickness within this range is mostly lower than with most of the wipes that are currently available at the market. By reducing the thickness, the liquid absorptive capacity can be reduced. By simultaneously reducing the pore volume, the lotion release can be kept high or even increased. For example, the pore volume can be reduced by producing a relatively high bulk density.
  • Thickness refers to the value as it can be measured according to NWSP 120.6.
  • the sheet material can have a bulk density, defined as the basis weight divided by the thickness, of at least 100 kg/m 3 , preferably at least 125 kg/m 3 .
  • BD bulk density
  • the lotion release value can be adjusted.
  • a higher bulk density generally increases the lotion release value.
  • the sheet material can comprise biodegradable short fibers, preferably pulp fibers, that are integrated into the at least one nonwoven layer.
  • biodegradable short fibers that are integrated into the nonwoven layer can be applied in a way that they fill the voids in the structure and therefore increase the bulk density. This feature can therefore be used to create a nonwoven sheet material according to the parameters as specified herein.
  • the bio-based biodegradable short fibers can be applied in a way that they fill voids in the nonwoven sheet material and therefore further reduce the amount of voids and pores in the material and facilitates a very compact structure. This further reduces the liquid absorptive capacity and, as it was surprisingly found, contributes to an increase in the lotion release value.
  • bio-based biodegradable short fibers for example, cellulosic pulp can be used which can either be applied to the nonwoven matrix by a wetlaid or airlaid technique.
  • the present disclosure relates to the use of a sheet material as it is disclosed herein to produce a wipe loaded with a fluid.
  • a lower amount of fluid is required to produce the fluid loaded wipe. Nonetheless, the user experiences the same or even better cleaning properties.
  • a base material consisting of the sheet material as disclosed herein can be cut, packaged and loaded with the fluid (in any technically sensible order).
  • the present disclosure relates to a wipe comprising a sheet material as disclosed herein.
  • Such a wipe can be loaded with a lower amount of fluid which reduces costs and has a positive environmental effect.
  • wipes include, but are not limited to, cleaning wipes, cosmetic caring wipes, peeling wipes, polishing wipes, body care wipes, refreshing wipes, deodorizing wipes and the like.
  • the wipe can be loaded with a fluid.
  • the wipe can be loaded with a fluid selected from a list comprising waterbased fluids, oil based fluids, disinfectant fluids, fluids comprising cleaning agents, fluids comprising skin-care agents, fluids comprising make-up removal agents.
  • the cleaning wipes can therefore be adapted to a broad spectrum of possible applications.
  • the present disclosure relates to a method for producing a sheet material comprising cellulosic regenerated fibers arranged in at least one nonwoven layer, wherein the sheet material comprises at least one nonwoven layer of a cellulosic web manufactured with endlessly produced filaments, particularly produced by a solution-blown technique, wherein the production parameters are selected to produce the sheet material to have a basis weight between 40 g/m 2 and 70 g/m 2 , preferably between 50 g/m 2 and 60 g/m 2 , a liquid absorptive capacity of less then 900%, preferably less than 800% and even more preferred less than 700%, and a lotion release value of more than 4%, preferably more than 4.5 %, most preferably of more than 5%.
  • the person skilled in the art is able to select and adjust production parameters to adjust the properties of the sheet material in a range that allows for a liquid absorptive capacity in the specified range.
  • production parameters can be selected to adjust the properties of the sheet material in a range that allows for a lotion release value in the specified range.
  • porosity is defined as the fractional empty space contained within the material. Further, the three-dimensional pore geometry and the fiber and/or filament diameters have to be taken into account and can be adapted according to the teachings disclosed herein to produce a sheet material according to the specified parameters.
  • the amount of voids and pores can be reduced.
  • the reduced voids can then take up less fluid and the fluid is then manly incorporated into the cellulosic matrix of the filaments.
  • Reducing the amount of coagulation spray leads to a higher merging of the filaments in the nonwoven layer.
  • the layer will be produced thinner and with a higher degree of filament merging (i.e. the filaments stick together). This will render the nonwoven layer more compact and will reduce the porosity. This also leads to a higher bulk density and reduced thickness.
  • the settings can be adjusted to produce a nonwoven material with the required basis weight, wherein the values for the coagulation spray intensity and the stretching air intensity can be chosen in a middle range of the possible settings.
  • Other parameters can be chosen according to other requirements of the specific nonwoven material to be produced. It has to be noted that under normal circumstances, the so produced nonwoven material will not have the particular properties as specified herein.
  • the production parameters are adapted in a systematic manner to reduce the voids.
  • a reduction of the voids can particularly be achieved by increasing the drawing-air-flow and/or reducing the coagulation spray intensity.
  • the method comprises one or more of the following features: a thickness of the sheet material as measured according to NWSP 120.6.
  • RO (15) [EN], Method A is adjusted to a value of between 0,35 mm and 0,6 mm, preferably between 0,4 and 0,5 mm, a bulk density of the sheet material, defined as the basis weight divided by the thickness, is adjusted to a value of at least 100 kg/m 3 , preferably at least 125 kg/m 3 .
  • a thickness and bulk density within these ranges allows for the production of a resource-efficient end product.
  • bio-based biodegradable short fibers preferably pulp fibers
  • pulp fibers can be integrated into the at least one nonwoven layer.
  • Non-exhaustive examples are the carded-wetlaid- pulp technique, the carded-airlaid-carded technique or the techniques that are disclosed in W02021170610A1.
  • the composite material After applying the pulp to the nonwoven material, preferably by a wetlaid- or airlaid- technique, the composite material can be pressed and compacted in a roller press and/or bound by hydroentanglement.
  • the integration of short fibers allows for a reduction of the voids and pores in the material. Further, the pulp has, inter alia, a positive effect on the softness of the product and the lotion release value.
  • the at least one nonwoven layer of cellulosic web can be subjected to the pressure of a roller press in a never-dried state to adjust the thickness of the sheet material.
  • the bulk density can be increased which, in turn, increases the lotion release value.
  • the roller press can either directly act on the nonwoven layer of cellulosic web alone or on the nonwoven layer after an integration of short fibers. Further, the roller press step can be applied before or after a hydroentanglement step (if such a step is provided for).
  • nonwoven refers to the nonwoven layer after having been deposited on the deposit surface, wherein the nonwoven layer is still in a wet state with essentially fully swollen fiber structure and has not experienced a heated air stream for drying.
  • the present disclosure relates to the use of a sheet material as disclosed herein and/or produced according to any of the methods disclosed herein for the production of consumer goods and/or industrial goods, wherein the consumer goods and/or industrial goods preferably can be selected from a list comprising wet wipes, cosmetic sheet masks, dry wipes designed for getting wetted with liquid, liquid application systems, woundcare products and the like.
  • a conventional nonwoven material was prepared according to the carded spunlacing technique.
  • the material was prepared with lyocell fibers of 1.7 dtex with a length of 38 mm.
  • the fibers were carded to form a fleece with the intended basis weight (see Table 1 below) and then spunlaced using 5 spunlacejet bars in ascending pressure settings at a line speed of 100 m/min.
  • a conventional nonwoven material was prepared according to the carded spunlacing technique.
  • the material was prepared according to the same settings as for Comparison Material 1, but using viscose fibers of 1.7 dtex with a length of 38 mm.
  • a nonwoven layer of a cellulosic web according to the teachings of the present disclosure was manufactured with endlessly produced lyocell filaments according to the solution-blown technique.
  • the production parameters were set to achieve a high bulk density (by reducing coagulation spray intensity to increase the filament merging and increasing the stretching-air-flow) and a low thickness, to reduce the liquid absorptive capacity.
  • the line speed and throughput were set to achieve a carrier material with a nominal basis weight of 20 g/m 2 .
  • the neverdried material was subsequently loaded with wetlaid pulp so as to add up to a nominal basis weight of approximately 60 gsm and hydroentangled so as to bind the wetlaid pulp to the carrier material.
  • To flatten the structure and further increase the bulk density the material was led through a pressing roller before drying. The composite was thereafter dryed and then collapsed to a very flat dry carrier pulp composite material.
  • a nonwoven layer of a cellulosic web according to the teachings of the present disclosure was manufactured with endlessly produced lyocell filaments according to the solution-blown technique. Compared to Alternative Material 1 the material was produced without wetlaid pulp. The line speed and throughput were set to achieve a nonwoven material with a nominal basis weight of 60 g/m 2 . To achieve a flat structure with high bulk density, relatively high filament stretching (fine filaments) in combination with a relatively high merging (low coagulation flow) was used. The fabric was subsequently hydroentangled with a low pressure setting so as to keep the thickness of the material on a low level. The material was subsequently dried (which caused a further collapse of thickness) and wound.
  • Table 1 shows the main properties of Samples and Comparison Samples, namely
  • Table 2 shows that both innovative Materials showed a significantly higher lotion release value than the Comparison Material, despite the reduced liquid absorptive capacity.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Sanitary Thin Papers (AREA)
  • Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)

Abstract

L'invention concerne un procédé de production d'un matériau en feuille et un matériau en feuille comprenant des fibres cellulosiques régénérées disposées dans au moins une couche non tissée. Le matériau en feuille comprend au moins une couche non tissée d'une bande cellulosique fabriquée avec des filaments produits sans fin, en particulier produite par une technique de soufflage de solution. Le matériau en feuille a une masse surfacique comprise entre 40 g/m2 et 70 g/m2, de préférence entre 50 g/m2 et 60 g/m2, une capacité d'absorption de liquide inférieure à 900 %, de préférence inférieure à 800 % et encore plus préférablement inférieure à 700 %, et une valeur de libération de lotion supérieure à 4 %, de préférence supérieure à 4,5 % et idéalement supérieure à 5 %.
EP24714527.9A 2023-04-14 2024-04-02 Matériau en feuille comprenant des fibres cellulosiques régénérées disposées dans au moins une couche non tissée Pending EP4695459A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP23168072.9A EP4446486A1 (fr) 2023-04-14 2023-04-14 Matériau en feuille comprenant des fibres régénérées cellulosiques agencées dans au moins une couche non tissée
PCT/EP2024/058945 WO2024213442A1 (fr) 2023-04-14 2024-04-02 Matériau en feuille comprenant des fibres cellulosiques régénérées disposées dans au moins une couche non tissée

Publications (1)

Publication Number Publication Date
EP4695459A1 true EP4695459A1 (fr) 2026-02-18

Family

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Family Applications (2)

Application Number Title Priority Date Filing Date
EP23168072.9A Withdrawn EP4446486A1 (fr) 2023-04-14 2023-04-14 Matériau en feuille comprenant des fibres régénérées cellulosiques agencées dans au moins une couche non tissée
EP24714527.9A Pending EP4695459A1 (fr) 2023-04-14 2024-04-02 Matériau en feuille comprenant des fibres cellulosiques régénérées disposées dans au moins une couche non tissée

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP23168072.9A Withdrawn EP4446486A1 (fr) 2023-04-14 2023-04-14 Matériau en feuille comprenant des fibres régénérées cellulosiques agencées dans au moins une couche non tissée

Country Status (4)

Country Link
EP (2) EP4446486A1 (fr)
JP (1) JP2026512158A (fr)
CN (1) CN120936766A (fr)
WO (1) WO2024213442A1 (fr)

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Publication number Publication date
EP4446486A1 (fr) 2024-10-16
WO2024213442A1 (fr) 2024-10-17
JP2026512158A (ja) 2026-04-14
CN120936766A (zh) 2025-11-11

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