EP2758592B1 - Procédé de compensation dimensionnelle de bandes de matière fibreuse - Google Patents

Procédé de compensation dimensionnelle de bandes de matière fibreuse Download PDF

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Publication number
EP2758592B1
EP2758592B1 EP12772416.9A EP12772416A EP2758592B1 EP 2758592 B1 EP2758592 B1 EP 2758592B1 EP 12772416 A EP12772416 A EP 12772416A EP 2758592 B1 EP2758592 B1 EP 2758592B1
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EP
European Patent Office
Prior art keywords
belt
base web
conveyor belt
elastic
web
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EP12772416.9A
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German (de)
English (en)
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EP2758592A1 (fr
EP2758592B8 (fr
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Marion Sterner
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Individual
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/12—Crêping
    • B31F1/122—Crêping the paper being submitted to an additional mechanical deformation other than crêping, e.g. for making it elastic in all directions

Definitions

  • the present invention relates to a method for dimensionally compensating webs of fibrous material.
  • Production methods for fibrous material, and in particular paper webs are known. They generally consist of pouring a mix of fibrous material and water onto an endless conveyor belt while in movement. This mix is progressively deprived of its water content thereon and is subjected to a series of traditional procedures which finally lead to the obtaining of a paper web or, in more general terms, to the obtaining of a web of fibrous material, to be then wound into rolls for subsequent uses.
  • printing generally requires precise formats which are often not submultiples of the width of the continuous web obtained from the paper machine.
  • the various manufactured paper products are obtained starting from a continuous paper web which is not always used in the format made available by the paper works, but has to be cut and can involve wastage due to scrap.
  • the fibrous web production process on a continuous machine gives the fibres a preferential orientation in the production direction.
  • This preferential orientation causes material anisotropy, i.e. different physico-mechanical properties in the production direction compared with the transverse direction. For example, the tensile strength and the rigidity are greater in the longitudinal direction; elongation, tearing resistance and hygroexpansivity are greater in the transverse direction.
  • Other factors contributing to anisotropy of the paper material are the traction to which the fibrous web is subjected along the continuous machine and the transverse contraction which it undergoes on drying. These factors introduce tensions among the interfibre bonds which are differently distributed in the two directions.
  • the longitudinal preferentiality in the fibre orientation direction and the consequent anisotropy of the paper web is one of the main causes of paper planarity defects.
  • the problem is highlighted if there is a difference between the relative humidity of the environment and that of the paper at equilibrium. In this respect, the fibres tend to swell more in their length direction.
  • the paper sheets can be deformed and not properly stretched.
  • voluminosity thickness/surface density ratio
  • voluminosity increases the paper compressibility, facilitating its adaptation to and contact with an inking form and hence increasing ink transfer in a printing process.
  • Voluminosity is also required in the tissue paper sector to provide softness and liquid absorption capacity.
  • a more isotropic paper with more uniform candling has better tearing and bursting resistance and is particularly suitable for producing bags.
  • EP 1,072,720 describes a production method for a fibrous material web using an elastic conveyor belt which, before receiving a base web of fibrous material of high water content, is subjected to longitudinal stretching such as to undergo a transverse contraction. When the elastic belt is returned to its unstressed condition it causes a corresponding widening of the fibrous material base web.
  • a drawback of this solution is the limit in the width of the fibrous material web obtainable, which at most can be equal to the width in the rest state of the unstressed elastic belt on which it is positioned.
  • An object of the invention is to provide a method which enables the width of a continuous web of fibrous material, and more particularly of a continuous paper web, to be modified, and to ensure stability of the thus modified web.
  • Another object of the invention is to provide a method which enables transversely widened, stabilized and possibly longitudinally compacted webs of fibrous material to be obtained.
  • Another object of the invention is to provide a method which can be implemented with the same plants used to obtain transversely compacted webs of fibrous material.
  • Another object of the invention is to form a web of fibrous material having high voluminosity, in terms of the thickness/surface density ratio.
  • Another object of the invention is to form a continuous web of fibrous material having a thickness less than the minimum obtainable with traditional paper manufacturing machines and in any event with a more homogeneous candling, for equal surface density, including at low surface densities.
  • Another object of the invention is to form a web of fibrous material having a fibre orientation which is more homogeneous and less unbalanced in the machine direction, and consequently with more isotropic properties (mechanical, hygroscopic, dimensional stability, etc.).
  • Another object of the invention is to form a web of fibrous material having controlled porosity.
  • Another object of the invention is to form a web of fibrous material having a controlled additive concentration along the web thickness.
  • Another object of the invention is to form a web of fibrous material the mechanical, optical and porosity characteristics of which can be mutually controlled and balanced more finely and flexibly than with traditional methods.
  • the invention also comprises an apparatus for implementing the method as described in claim 22.
  • the method according to the invention starts from a fibrous material base web 2 having a dry content between 3% and 80% and hence a moisture content between 20% and 97%.
  • This fibrous material base web 2 which could also be coupled to a polymer film, is deposited on a conveyor belt 4 made of elastic material and having at least one portion subjected to transverse extension by any mechanical action, for example a transverse traction at its edges or in proximity thereto, or a forced removal from the sliding plane of a portion thereof retained at its edges.
  • Figure 1 shows an elastic belt 4 subjected to transverse stretching by the application of traction force at its edges in the direction of the arrows 6, while
  • Figure 2 shows an elastic belt 4 subjected to transverse stretching by the temporary forced introduction of the belt, consisting of a tubular sleeve 4 wrapped about a rigid roller 8, into a pair of circumferential cavities 10 formed in said rolled in proximity to its two ends.
  • This temporary forced introduction can be advantageously caused by interference by a pair of introduction rollers 12, which partly enter said circumferential cavities 10.
  • the fibrous material base web undergoes compaction in the longitudinal direction due to the simultaneous longitudinal shortening of the elastic belt, if this has a normal Poisson deformation coefficient (for example around 0.5).
  • the simultaneous longitudinal compaction of the belt 4 can be prevented if this is filled with fibres disposed longitudinally and resistant to axial compression (for example steel, Kevlar, carbon), or if it is made from a material having a Poisson coefficient ideally close to zero.
  • the elastic conveyor belt 4 can consist of one or more layers of possibly expanded elastomer, or of single or multiple fabric formed of threads which may be elastic, or non-elastic but woven in accordance with an elastic weave, or finally of a composite layer formed from the preceding.
  • It can also be permeable to fluids and contain a sponge layer able to absorb and/or release liquids.
  • the elastic belt 4 can constitute the belt of the so-called flat table, which in a traditional paper machine receives the mix originating from the head box.
  • the pliable material base web 2 can originate directly from the head box of any paper processing machine or can be obtained from an already formed paper web already subjected to wetting until having the desired moisture content. It can also consist of cellulose fibres, if a paper web is to be obtained, or of cellulose and polymer fibres or only of polymer fibres, if a web of non-woven fabric is to be obtained.
  • the surface can be functionalized such as to present high affinity for cellulose.
  • the material forming the elastic belt 4 can be made starting from a mixture of elastic material (rubber) and cellulose in the form of fibres, microcrystals (microcrystalline cellulose) or nanofibres (nanocellulose).
  • the cellulose fibres or nanofibres can be bonded to the elastic surface by suitable binders, such as latex or adhesion promoters based, for example, on silicates and titanates.
  • suitable binders such as latex or adhesion promoters based, for example, on silicates and titanates.
  • this latter can be subjected to corona treatment or generally to plasma treatment.
  • An elastic fabric composed partly of cotton can also be used as the material forming the conveyor belt 4.
  • the conveyor belt 4 can also be covered or impregnated with a gum latex of low glass transition temperature, such as those used for pressure-sensitive adhesives, traditionally used for post-it pads. Finally, the conveyor belt 4 can be covered or impregnated with formulations typically used for increasing the adhesion of the fibre web to the Yankee cylinder used in producing tissue paper.
  • said base web can be pressed against said conveyor belt by a smooth flat or cylindrical (roller) surface; and said belt can also comprise on its surface a plurality of microhooks to favour the gripping of the base web 2 to the belt 4.
  • the transversely stretched fibrous material base web 2 is withdrawn from the belt, in order not to be subjected to any transverse recompacting.
  • the fibrous material base web 2 can be thinned, for equal voluminosity, to an extent often greater than that obtainable by traditional papermaking processes.
  • a blade of air or water vapour or possibly a doctor blade can be used to detach the fibrous base web 2.
  • the sliding of the elastic belt on these conveyor rollers is advantageously facilitated by suitable lubricant substances interposed between the two, or by adequately varying the belt thickness and/or by a suitably convex shaping of the conveyor rollers, or by providing these with ball retainers.
  • Figure 3 is a schematic section through a conveyor belt 4 with different thicknesses, namely thinner in the central band and thicker in the two lateral bands. This is wrapped about a convex roller 8, such that during its introduction into the circumferential cavities 10 it is not subjected to sudden deviations, which could result in abnormal stresses, rapid wear and transverse stretching disuniformity.
  • the two introduction rollers 12 present a complementary shape and can also have all or part of their surface provided with ball retainers (not shown), which facilitate transverse sliding of the conveyor belt 4 thereon.
  • Figure 4 shows a conveyor belt 4 which besides being of differential thickness in the transverse direction, is stretched by withdrawal from its sliding plane by the presence of two ball retainers 14, on which the belt rests.
  • Figure 5 shows a conveyor belt 4, in which the transverse stretching is caused on the actual belt sliding plane, by virtue of ball retainers 14' of particular form.
  • Figure 6 shows a conveyor belt 4, which is stretched transversely by using a particular curved stretching roller 16, known as a banana in technical jargon and formed by a plurality of minor rollers 18 mounted on one and the same curved shaft 20.
  • a particular curved stretching roller 16 known as a banana in technical jargon
  • a plurality of minor rollers 18 mounted on one and the same curved shaft 20.
  • transverse stretching of the base web 2 is achieved by traditional templates, in which the inclined discs with hooks are replaced by discs with a rubber-coated edge.
  • Figure 7 shows a conveyor belt 4, which after being subjected to transverse stretching in one of the previously described manners, is also subjected to longitudinal stretching.
  • This longitudinal stretching is induced by dragging by a roller 22, which rotates at a peripheral velocity greater than the peripheral velocity of the roller 8, about which the belt 4 passes during the transverse stretching stage.
  • the conveyor belt 4 can also be subjected to several successive localized transverse stretchings, and the fibrous base web 2 be positioned on the conveyor belt before commencement of stretching, and then be removed therefrom when stretching is terminated, and then be newly positioned on the same conveyor belt 4 before commencement of the next stretching and so on, such as to be able to be subjected to several stretchings in sequence.
  • Figure 8 shows a sleeve-shaped conveyor belt 4 wrapped about a roller 8, with which two pairs of introduction rollers 12 are associated, acting on the belt 4 in two separate positions, such as to subject the base web of pliable material to two successive transverse stretching stages.
  • the base web 2 after the first stretching stage the base web 2 must be withdrawn from the conveyor belt 4 before it resumes its original configuration, this being achieved by a pair of auxiliary conveyor belts 26, the function of which is to withdraw the base web 2, already partially stretched transversely in the first station, and to bring it into the second station, where it is subjected to the second transverse stretching stage.
  • Figure 9 shows the same principle, applied however to an elastic conveyor belt 4 taut between two rollers 8, 8'.
  • the two transverse stretching stages of the base web 2 are implemented at the same roller 8
  • the two transverse stretching stages are implemented at two different rollers 8, 8' in this case.
  • transverse stretching of the fibrous base web 2 is more effective both because of the more intense removal of the moisture contained therein, and because of its better adherence to the widening conveyor belt 4.
  • the invention also provides for the use of fixed or rotatable mechanical presser elements provided with low friction surfaces, or of felts or other endless belts, including elastic belts.
  • a single felt can be used, maintaining the base web 2 adherent to the conveyor belt 4 during transverse stretching, or two felts can be used, between which the base web 2, withdrawn from the conveyor belt 4 at the end of the or of each transverse stretching stage, is interposed.
  • the auxiliary conveyor belts 26 already described relative to Figures 8 and 9 can perform the function of felts for partially removing water from the base web 2.
  • the conveyor belt 4 and the felt 26 cooperating with it can be driven at the same velocity, or at different velocities such as to cause a voluminosity increase of the fibrous base web 2 interposed between them.
  • Both the conveyor belt 4 and the felt or the endless belt 26 can have their surface functionalized such as to present a high affinity for cellulose.
  • the fibrous base web 2 After the fibrous base web 2 has been pressed between the two belts 26 or between the conveyor belt 4 and the felt 26 cooperating with it, and which have a surface of high affinity for cellulose and behave elastically, they and the interposed base web 2 are simultaneous deformed. Moreover, if the two elastic belts are subjected to stretching at the respective edges, and at the same time a distance is maintained between the two which is at least equal to that preceding the stretching, the base web 2 will simultaneously undergo stretching in the transverse direction and stretching along the Z axis. This is due to the adhesion forces between each face of the base web 2 and the elastic surface of the upper and lower conveyor belts, and also to the transverse stretching and the consequent thinning of the thickness of the two elastic belts.
  • the stretching of the still moist and pliable fibrous base web 2 along the Z axis is directed to causing a voluminosity increase of said base web; again in this case, detachment of the base web 2 can be facilitated by doctor blades, by air blades or by air blown through the lower and upper elastic conveyor belts at the detachment point.
  • Figure 10 shows this principle schematically. It can be clearly seen that the conveyor belt 4 is subjected in one section to transverse stretching by one of the various methods previously described. In the section upstream of the stretched section, the belt 4 receives the base web of pliable fibrous material, which is then removed from the belt 4 at its point of maximum widening. There, a second base web 2' of fibrous material is deposited on the belt 4, such that its elastic return to the initial configuration causes transverse compaction of the base web 2', useful to provide it with transverse extensibility characteristics.
  • the pliable fibrous base web 2 can also be treated, immediately before, during or immediately after stretching, with additives for conferring particular properties. In this manner it is possible to optimize the additive addition efficiency, hence limiting liquid effluent production. Incompatibility between the additives in solution or suspension (for example because of pH incompatibility or because they would form a gel or a precipitate) can be avoided by adding them in different stages. In this manner for example, a gel could be formed directly within the fibrous base web by adding two gelling components separately, such as alginate and calcium ions.
  • This additive addition can consist of spraying, of deposition by rollers, of impregnation with liquid formulations released from a sponge layer forming part of the elastic belt, or other methods known to the expert of the art.
  • the degree of dryness of the fibrous base web is chosen on the basis of the additive to be added, the uniformity of surface distribution, the penetration along the thickness of the base web and/or the final effect to be obtained. In particular, greater control of the degree of surface distribution (including regulated addition) and of the penetration of the additive along the thickness of the fibrous base web can be achieved.
  • Additives in powder form are preferably dispersed in water and mixed with binding agents, such as cationic polymers, nanocellulose, polyglycols, acrylic dispersions, styrene-butadiene dispersions, etc.
  • binding agents such as cationic polymers, nanocellulose, polyglycols, acrylic dispersions, styrene-butadiene dispersions, etc.
  • Said additives can also be activated by administering energy from the outside (heat, UV or visible radiation, microwaves, electron beam, etc.), and provide the required effect only after activation (including external to the paper machine).
  • the additives can be encapsulated in microcapsules added to the fibrous base web and of which the capsule shell can be broken successively by applying pressure or heat, in order to cause release of the additive at the required moment.
  • the various additives must be able to perform their function and be activated, if necessary, without mutual interference.
  • the additives to be added can provide properties such as:
  • the method of the invention is suitable for a great number of applications and in particular to receive additives of various type and properties, able to confer on the final product, and in particular on paper webs, properties and potentialities which previously did not exist.
  • the method of the invention can be combined with traditional treatment methods for the final fibrous web, and in particular with coupling methods and/or methods for stretching coupled webs and/or production methods for extensible material webs, such as those described for example in EP 772522 , in EP 824619 , in EP 876536 , in EP 946353 , in US 2624245 or in US 7918966 .
  • apparatuses according to the invention can advantageously consist of independent modules, which can be added to or removed from the production line as required.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Paper (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Treatment Of Fiber Materials (AREA)

Claims (15)

  1. Procédé de compensation dimensionnelle de bandes de matière fibreuse, comprenant les étapes consistant à amener une bande de base (2) d'une matière fibreuse pliable, qui présente une teneur en matières sèches comprise entre 3 % et 80 %, à adhérer à une courroie transporteuse sans fin (4) constituée d'une matière élastique lorsque cette dernière se trouve dans sa condition non contrainte, soumettre ensuite ladite courroie et ladite bande de base adhérant à celle-ci à un étirement transversal localisé, en commençant à partir de ladite condition non contrainte, et jusqu'à une élimination partielle de la teneur en matières liquides, et enfin enlever ladite bande de ladite courroie avant que cette dernière ait commencé son retour élastique vers ladite condition non contrainte.
  2. Procédé selon la revendication 1, caractérisé par l'étape consistant à soumettre ladite courroie (4) avec ladite bande de base (2) adhérant à celle-ci à un étirement transversal par un enlèvement forcé au moins partiel d'une partie de ladite courroie, retenue à ses bords, de son plan de coulissement alors qu'elle se trouve dans ladite condition non contrainte.
  3. Procédé selon une ou plusieurs des revendications précédentes, caractérisé par l'étape consistant à soumettre ladite courroie (4) avec ladite bande de base (2) adhérant à celle-ci à un étirement transversal en appliquant une action de traction mécanique aux bords de la courroie coplanaire à son plan de coulissement.
  4. Procédé selon une ou plusieurs des revendications précédentes, caractérisé par l'étape consistant à amener ladite courroie (4), enroulée autour d'un premier rouleau sensiblement rigide (8), à subir un étirement par l'interférence d'au moins un deuxième rouleau sensiblement rigide (12) dont l'axe est parallèle à l'axe du premier rouleau et qui agit dans le sens de pousser ladite courroie (4) dans une cavité circonférentielle correspondante (10) prévue dans ledit premier rouleau (8).
  5. Procédé selon une ou plusieurs des revendications précédentes, caractérisé par l'étape consistant à amener ladite bande de base (2) de matière pliable, en provenance de la caisse de tête d'une machine de fabrication de papier, à adhérer à ladite courroie transporteuse élastique (4).
  6. Procédé selon une ou plusieurs des revendications précédentes, caractérisé par l'étape consistant à amener ladite bande de base (2) de matière pliable, obtenue à partir d'une bande de papier déjà formée, préalablement soumise à un mouillage à la teneur en humidité souhaitée, à adhérer à ladite courroie transporteuse élastique (4).
  7. Procédé selon une ou plusieurs des revendications précédentes, caractérisé par l'étape consistant à faciliter l'étirement transversal de ladite courroie transporteuse élastique (4) en interposant des moyens de réduction de frottement entre cette dernière et les éléments avec lesquels elle entre en contact.
  8. Procédé selon une ou plusieurs des revendications précédentes, caractérisé en ce que, pendant l'étape de retour élastique de ladite courroie transporteuse préalablement étirée transversalement (4), une bande de base différente (2') constituée d'une matière fibreuse pliable est amenée à adhérer à celle-ci, en vue d'être soumise à un compactage transversal.
  9. Procédé selon une ou plusieurs des revendications précédentes, caractérisé par l'étape consistant à soumettre ladite bande de base (2) de matière pliable, pendant n'importe quelle étape de son traitement, à un ajout d'additifs avec des agents de différents types, pouvant éventuellement être activés en administrant de l'énergie depuis l'extérieur, et capables de conférer des propriétés spécifiques au produit final obtenu.
  10. Procédé selon une ou plusieurs des revendications précédentes, caractérisé par les étapes consistant à soumettre ladite courroie transporteuse (4) à plusieurs étirements transversaux localisés successifs, à enlever la bande de base (2) de matière pliable de ladite courroie (4) avant le commencement de son étape de retour élastique à la fin de chacun de ses étirements transversaux, et à l'envelopper afin qu'elle adhère à nouveau à celle-ci avant son étirement transversal suivant.
  11. Dispositif de mise en oeuvre du procédé selon l'une des revendications 1 à 10, comprenant:
    - une courroie transporteuse sans fin (4) constituée d'une matière élastique;
    - une station d'alimentation pour amener une bande de base (2) constituée d'une matière fibreuse pliable, qui présente une teneur en matières sèches comprise entre 3 % et 80 %, sur ladite courroie (4);
    - des moyens positionnés en aval de ladite station d'alimentation, en référence à la direction d'avancement de ladite courroie (4), pour l'étirement transversal localisé de ladite courroie; et
    - des moyens pour enlever ladite bande de base déjà étirée transversalement (2) de ladite courroie (4) avant son retour élastique dans la configuration de repos.
  12. Dispositif selon la revendication 11, caractérisé en ce que ladite courroie transporteuse (4) est constituée d'une matière qui est perméable aux fluides et/ou qui est capable d'absorber ceux-ci et de les relâcher.
  13. Dispositif selon une ou plusieurs des revendications précédentes, caractérisé en ce que ladite courroie transporteuse (4) consiste en un manchon élastique troué qui est monté sur un premier rouleau (8) constitué d'une matière sensiblement rigide comportant au moins une cavité circonférentielle (10).
  14. Dispositif selon la revendication 13, caractérisé en ce qu'il comprend une paire de deuxièmes rouleaux de poussée sensiblement rigides (12) dont l'axe est parallèle à l'axe dudit premier rouleau (8) et qui agissent dans le sens d'entraîner une introduction localisée temporaire dudit manchon élastique (4) dans des cavités circonférentielles correspondantes (10) prévues dans ledit premier rouleau (8).
  15. Dispositif selon une ou plusieurs des revendications précédentes, caractérisé en ce qu'il est équipé d'une courroie transporteuse (4) constituée d'une matière perméable aux fluides et en ce qu'il présente au moins un orifice d'aspiration (24) en face de la surface de ladite courroie transporteuse (4) qui est opposée à celle à laquelle ladite bande de base (2) de matière fibreuse pliable adhère.
EP12772416.9A 2011-09-19 2012-09-17 Procédé de compensation dimensionnelle de bandes de matière fibreuse Active EP2758592B8 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000063A ITVE20110063A1 (it) 2011-09-19 2011-09-19 Metodo di compensazione dimensionale di nastri di materiale fibroso.
PCT/IB2012/001894 WO2013041957A1 (fr) 2011-09-19 2012-09-17 Procédé de compensation dimensionnelle de bandes de matière fibreuse

Publications (3)

Publication Number Publication Date
EP2758592A1 EP2758592A1 (fr) 2014-07-30
EP2758592B1 true EP2758592B1 (fr) 2015-12-09
EP2758592B8 EP2758592B8 (fr) 2016-12-07

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IT (1) ITVE20110063A1 (fr)
WO (1) WO2013041957A1 (fr)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE516549A (fr) 1952-06-11
IT1268987B1 (it) 1994-07-22 1997-03-18 Giorgio Trani Metodo per confezionare in dosi e secondo una forma tridimensionale prodotti allo stato liquido, eventualmente solidificabili
IT1287656B1 (it) 1995-04-07 1998-08-06 Cartiere Cariolaro Spa Procedimento per la produzione di carta cedevole ed impianto per effettuare il procedimento
ITVE960001A1 (it) 1996-01-22 1997-07-22 Giorgio Trani Materiale cartaceo per realizzare confzioni morbide tridimensionali per prodotti allo stato solido, liquido, eventualmente solidificabili
ITVE960038A1 (it) 1996-12-05 1998-06-05 Giorgio Trani Metodo per realizzare forme e confezioni morbide tridimensionali in materiale cartaceo e confezione ottenuta con il metodo.
US6348679B1 (en) 1998-03-17 2002-02-19 Ameritherm, Inc. RF active compositions for use in adhesion, bonding and coating
DE19935481A1 (de) * 1999-07-28 2001-02-08 Voith Paper Patent Gmbh Verfahren und Vorrichtung zur Herstellung einer Faserstoffbahn
ITVE20040013A1 (it) 2004-04-14 2004-07-14 Cartiere Cariolaro S P A Metodo di realizzazione di carta estensibile, impianto per attuare il metodo, prodotto ottenuto con il metodo e materiale cartaceo ottenuto con il prodotto.
DE102004040425A1 (de) * 2004-08-20 2006-02-23 Voith Paper Patent Gmbh Maschine zur Herstellung einer Faserstoffbahn und Verfahren zum Stauchen der Faserstoffbahn
CA2679361A1 (fr) 2007-04-30 2008-11-06 Munksjoe Paper, S.A. Utilisation d'un additif dans la production d'un papier de decoration
ITVE20080066A1 (it) * 2008-08-07 2010-02-08 Giorgio Trani Metodo di realizzazione di nastri di materiale fibroso estensibile trasversalmente, in particolare carta, ed apparecchiatura per effettuare il metodo.

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Publication number Publication date
EP2758592A1 (fr) 2014-07-30
WO2013041957A1 (fr) 2013-03-28
EP2758592B8 (fr) 2016-12-07
ITVE20110063A1 (it) 2013-03-20

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