WO2013041957A1 - 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
WO2013041957A1
WO2013041957A1 PCT/IB2012/001894 IB2012001894W WO2013041957A1 WO 2013041957 A1 WO2013041957 A1 WO 2013041957A1 IB 2012001894 W IB2012001894 W IB 2012001894W WO 2013041957 A1 WO2013041957 A1 WO 2013041957A1
Authority
WO
WIPO (PCT)
Prior art keywords
conveyor belt
base web
belt
elastic
fibrous material
Prior art date
Application number
PCT/IB2012/001894
Other languages
English (en)
Inventor
Giorgio Trani
Marion Sterner
Original Assignee
Giorgio Trani
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 Giorgio Trani filed Critical Giorgio Trani
Priority to EP12772416.9A priority Critical patent/EP2758592B8/fr
Publication of WO2013041957A1 publication Critical patent/WO2013041957A1/fr

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Classifications

    • 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 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.
  • Figure 1 shows schematically a portion of elastic conveyor belt on which a continuous base web of fibrous material subjected to the method of the invention is positioned
  • Figure 2 shows schematically a section through a first embodiment of an elastic sleeve wrapped about a roller and subjected to localized stretching
  • Figure 3 shows a second embodiment thereof in the same view
  • Figure 4 shows a third embodiment thereof in the same view
  • Figure 5 shows a fourth embodiment thereof in the same view
  • Figure 6 shows in lateral view a particular curved roller for implementing the transverse stretching of the elastic conveyor belt
  • Figure 7 is a section through an elastic conveyor belt associated with means for subjecting the fibrous material base web to transverse stretching and to longitudinal stretching,
  • Figure 8 is a section through a roller wrapped by an elastic sleeve subjected to two stages of localized stretching
  • Figure 9 is a section through an elastic conveyor belt taut between two deviation rollers and subjected to localized stretching at each of these, and
  • Figure 10 is a perspective view of two continuous fibrous material base webs, one subjected to localized transverse stretching by the method of the invention, and the other subjected by the same conveyor belt to transverse compaction.
  • 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 paper- making 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:
  • porosity control surface porosity is essential for determining the capacity to filter ink pigments from their carrier and hence for print quality along the thickness with additives such as:
  • o mineral fillers generated in situ by precipitation such as precipitated CaC03 to which a calcium bicarbonate solution is added and water and carbon dioxide removed by heating; the solution can contain binders and/or substances able to influence the morphology of the precipitated
  • waxes including natural waxes, preferably in dispersion
  • adhesive curing rate particularly polyurethane based
  • o pigments in dispersion particularly titanium dioxide for degree of whiteness
  • biodegradable susceptors such as some of those described in US 6348679, able to convert electromagnetic energy at radio frequency or microwaves into heat.
  • the susceptors can be added in mixture with nanocellulose such as to be able to achieve effective drying of this latter.
  • oxygen scavengers o encapsulated substances to function at the required moment, such as ferrous salts
  • 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.

Landscapes

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

Abstract

La présente invention concerne un procédé de compensation dimensionnelle de bandes de matière fibreuse, caractérisé par les étapes consistant à amener une bande de base (2) en matière fibreuse pliable, présentant une teneur en matières sèches comprise entre 3 % et 80 %, à adhérer à une bande transporteuse sans fin (4) en matière élastique lorsque cette dernière se situe dans son état non contraint, puis à soumettre ladite bande transporteuse et la bande de base adhérant à celle-ci à un étirement transversal localisé, à partir dudit état non contraint, et à une élimination partielle de la teneur en liquide, et enfin à retirer ladite bande de base de ladite bande transporteuse avant que cette dernière n'ait commencé à revenir élastiquement audit état non contraint.
PCT/IB2012/001894 2011-09-19 2012-09-17 Procédé de compensation dimensionnelle de bandes de matière fibreuse WO2013041957A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12772416.9A EP2758592B8 (fr) 2011-09-19 2012-09-17 Procédé de compensation dimensionnelle de bandes de matière fibreuse

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITVE2011A000063 2011-09-19
IT000063A ITVE20110063A1 (it) 2011-09-19 2011-09-19 Metodo di compensazione dimensionale di nastri di materiale fibroso.

Publications (1)

Publication Number Publication Date
WO2013041957A1 true WO2013041957A1 (fr) 2013-03-28

Family

ID=44883342

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2012/001894 WO2013041957A1 (fr) 2011-09-19 2012-09-17 Procédé de compensation dimensionnelle de bandes de matière fibreuse

Country Status (3)

Country Link
EP (1) EP2758592B8 (fr)
IT (1) ITVE20110063A1 (fr)
WO (1) WO2013041957A1 (fr)

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2624245A (en) 1952-06-11 1953-01-06 Cluett Peabody & Co Inc Modified paper and method for its manufacture
EP0772522A1 (fr) 1994-07-22 1997-05-14 Giorgio Trani Composite a base de papier pour la fabrication d'emballages de produits liquides ou granulaires
EP0824619A1 (fr) 1995-04-07 1998-02-25 CARTIERE CARIOLARO S.p.A. Procede pour produire un papier a limite d'elasticite elevee et installation pour mettre en uvre ce procede
EP0876536A1 (fr) 1996-01-22 1998-11-11 Giorgio Trani Conteneurs d'emballage en papier et leur procede de fabrication
EP0946353A1 (fr) 1996-12-05 1999-10-06 Giorgio Trani Procede de confection de formes et emballages souples tridimentionnels avec du materiau en papier, et emballages realises au moyen dudit procede
EP1072720A2 (fr) 1999-07-28 2001-01-31 Voith Paper Patent GmbH Procédé et dispositif pour la fabrication d'une bande fibreuse
US6348679B1 (en) 1998-03-17 2002-02-19 Ameritherm, Inc. RF active compositions for use in adhesion, bonding and coating
DE102004040425A1 (de) * 2004-08-20 2006-02-23 Voith Paper Patent Gmbh Maschine zur Herstellung einer Faserstoffbahn und Verfahren zum Stauchen der Faserstoffbahn
WO2008131793A1 (fr) 2007-04-30 2008-11-06 Munksjoe Paper, S.A. Utilisation d'un additif dans la production d'un papier de décoration
WO2010015614A1 (fr) * 2008-08-07 2010-02-11 Giorgio Trani Procédé de fabrication de films de matériau fibreux extensible transversalement, en particulier de papier, et appareil de mise en œuvre du procédé
US7918966B2 (en) 2004-04-14 2011-04-05 Cartiere Cariolaro S.P.A. Method for producing extensible paper, plant for implementing the method, product obtained by the method, and paper material obtained from the product

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2624245A (en) 1952-06-11 1953-01-06 Cluett Peabody & Co Inc Modified paper and method for its manufacture
EP0772522A1 (fr) 1994-07-22 1997-05-14 Giorgio Trani Composite a base de papier pour la fabrication d'emballages de produits liquides ou granulaires
EP0824619A1 (fr) 1995-04-07 1998-02-25 CARTIERE CARIOLARO S.p.A. Procede pour produire un papier a limite d'elasticite elevee et installation pour mettre en uvre ce procede
EP0876536A1 (fr) 1996-01-22 1998-11-11 Giorgio Trani Conteneurs d'emballage en papier et leur procede de fabrication
EP0946353A1 (fr) 1996-12-05 1999-10-06 Giorgio Trani Procede de confection de formes et emballages souples tridimentionnels avec du materiau en papier, et emballages realises au moyen dudit procede
US6348679B1 (en) 1998-03-17 2002-02-19 Ameritherm, Inc. RF active compositions for use in adhesion, bonding and coating
EP1072720A2 (fr) 1999-07-28 2001-01-31 Voith Paper Patent GmbH Procédé et dispositif pour la fabrication d'une bande fibreuse
US7918966B2 (en) 2004-04-14 2011-04-05 Cartiere Cariolaro S.P.A. Method for producing extensible paper, plant for implementing the method, product obtained by the method, and paper material obtained from the product
DE102004040425A1 (de) * 2004-08-20 2006-02-23 Voith Paper Patent Gmbh Maschine zur Herstellung einer Faserstoffbahn und Verfahren zum Stauchen der Faserstoffbahn
WO2008131793A1 (fr) 2007-04-30 2008-11-06 Munksjoe Paper, S.A. Utilisation d'un additif dans la production d'un papier de décoration
WO2010015614A1 (fr) * 2008-08-07 2010-02-11 Giorgio Trani Procédé de fabrication de films de matériau fibreux extensible transversalement, en particulier de papier, et appareil de mise en œuvre du procédé

Also Published As

Publication number Publication date
EP2758592B1 (fr) 2015-12-09
EP2758592B8 (fr) 2016-12-07
ITVE20110063A1 (it) 2013-03-20
EP2758592A1 (fr) 2014-07-30

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