EP3533927A1 - Procédé de production de toile fibreuse, de papier ou de carton et produit de papier ou de carton - Google Patents

Procédé de production de toile fibreuse, de papier ou de carton et produit de papier ou de carton Download PDF

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Publication number
EP3533927A1
EP3533927A1 EP18159525.7A EP18159525A EP3533927A1 EP 3533927 A1 EP3533927 A1 EP 3533927A1 EP 18159525 A EP18159525 A EP 18159525A EP 3533927 A1 EP3533927 A1 EP 3533927A1
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EP
European Patent Office
Prior art keywords
bdt
furnish
paper
pulp
broke
Prior art date
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Application number
EP18159525.7A
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German (de)
English (en)
Inventor
Martin ESKILSSON
Johan Lindgren
Brita TIMMERMANN
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Holmen AB
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Holmen AB
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Publication date
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Priority to EP18159525.7A priority Critical patent/EP3533927A1/fr
Publication of EP3533927A1 publication Critical patent/EP3533927A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • D21H21/50—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 form
    • D21H21/56—Foam
    • 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
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/14—Carboxylic acids; Derivatives thereof
    • D21H17/15—Polycarboxylic acids, e.g. maleic acid
    • D21H17/16—Addition products thereof with hydrocarbons
    • 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
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/17—Ketenes, e.g. ketene dimers
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds
    • D21H17/66—Salts, e.g. alums
    • 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
    • D21H21/16—Sizing or water-repelling agents

Definitions

  • the present invention is related to a method for producing a fibrous web according to claim 1 and a paper or paper board product according to claim 16. It is also related to a paper or paper board product and also a packaging box product.
  • a problem with foam in paper or paper board production is that thickness of the fiberweb will vary more than compared with a water formed paper or paper board product.
  • a further problem is that the density of the product may vary.
  • a further problem is that formation may be slower and speed of the paper machine may need to be reduced.
  • a further problem is that the fibre mat that is formed into a paper or paper board may break more easily. One reason for this is that the tensile strength of the paper or paper board is in general reduced if foam occurs on the paper machine.
  • a further problem is that with if foam occurs in the furnish it is difficult to achieve a higher surface weight paper.
  • a further problem when foam occurs is that the furnish will split in terms of hydrophobic and hydrophilic particles and the formation of the fibre layer will not be homogenous. If adding a surfactant on purpose despite the above discussed disadvantages with foam, a disadvantage is that other components of the furnish, such as sizing agents will have its effect on for example retention on the paper machine to be affected as the surfactant risk to impede sizing properties.
  • a further problem with active foaming is that the dewatering on the paper machine can deteriorate.
  • the present invention is related to an improved method for producing a fibrous web. It is may also be a method for producing a paper or a paper board.
  • the method comprising the step of providing a furnish comprising pulp.
  • the method also comprising to provide a surfactant to said furnish.
  • the method also comprising to mix the furnish with the surfactant in order to achieve a foamed furnish.
  • the method also comprising the step to provide the foamed furnish to a wire that dewaters the foamed furnish in order to achieve the fibrous web, paper or paper board.
  • the pulp of the furnish comprises a chemical pulp preferably of a content of 25-100 % BDT the total pulp content in BDT. It is also preferred that the chemical pulp content is 50-100 % BDT the total pulp content in BDT.
  • the amount of chemical pulp may be 70-100 % BDT in the method.
  • the amount of chemical pulp may be 85-100 % the total pulp content in BDT.
  • the amount of chemical pulp may be essentially 100
  • the effect of the method is that foaming can unexpectedly be used with good results in providing a fibrous layer, paper or paper board, despite the given disadvantages above.
  • the bulk of products made from the chemical pulp can be increased.
  • a further advantage is that the produced product achieves 10% added thickness compared with a water sample. Bulk can also be increased by over 100% if no wet pressing is performed. But in general at least 10 % or even 13 % can be achieved in increased bulk. And further by using surfactant floc size of hand sheets can be reduced by 20%, see also figure 3 .
  • the first bar on left refers to a hand sheet made from a furnish with only water and the second bar refers to a foamed furnish using an anionic surfactant, and the third bar refers to a hand sheet made from a furnish mixed with a non-ionic surfactant. It is also possible to achieve a modulus of elasticity that is same as a water formed sample. By increasing the amount of chemical pulp in the method the advantages is further increased that was already seen above.
  • the advantage of adding a sizing agent is that the foamed furnish will have better mechanical properties when formed to a fibrous web, a paper or paper board, despite the known disadvantages with a foamed furnish.
  • a chemical pulp is actually often considered to give strong paper products as the fibres are long and can add strength by their own mechanical properties.
  • adding a cationic polyelectrolyte is often considered not necessary in this context.
  • improvement of the mechanical properties given is despite this context, adding a cationic polyelectrolyte gives a better paper product in particular in terms of z-strength, i.e. cross sheet strength in thickness direction.
  • a hardwood pulp will in general be less performant than a soft wood pulp when considering mechanical properties. Thus it is not a straight forward operation to use foam on a furnish that is mainly made from hard wood.
  • a soft wood pulp will be a stronger pulp in general. However as soft wood is in general chosen when a stronger paper or paper board is desired in respect of mechanical properties, it will not be a straight forward operation to make a foamed furnish from with soft wood fibres. In particular it has been found advantageous to mix the pulp with broke. It surprisingly gives better foaming properties for some particular surfactants.
  • the fibre content of the broke will generally follow the fibre content of the fibre web or paper or paper board product produced in the mill.
  • an anionic surfactant is better formation of foam in general in the method as described.
  • sodium dodecyl sulphate only requires very low dosage for same amount of foam, compared with other surfactants.
  • Anionic surfactants can also have higher air content than other surfactants.
  • the time to reach a predetermined air content of the foam is not sensitive to higher amount of broke than for a pure virgin chemical pulp, with an anionic surfactant.
  • Glycolic acid ethoxylate lauryl ether gives the advantage of reaching a predetermined air content of the foam at almost same time at high amounts of broke as with no broke added at all.
  • anionic and multi charged surfactant is that it is not sensitive to a pulp with higher amount of broke than furnish based on pure virgin chemical pulp.
  • the advantage of an anionic surfactant with an ethoxylate chain is that the time to reach a predetermined air content of the foam is faster in a furnish having a high amount of broke than a furnish based on pure virgin chemical pulp.
  • non-ionic surfactant gives a higher bulk than an anionic surfactant.
  • amphoteric surfactant is a very good stability of produced foam.
  • a middle ply it is possible to use the reduced mechanical properties of the foamed furnish and letting other plies of the furnish add strength to the finished product.
  • ad bulk it is possible to a middle layer.
  • same pulp is used for all layers but only a middle layer has foamed furnish of this pulp.
  • Any number of plies is possible to add to a paper or paper board product. It is thus possible to make a five ply product. In this case on or two or three of the inner plies can be provided with the foamed furnish.
  • the provided furnish can be a bleached furnish.
  • the provided furnish can be a non-bleached furnish.
  • a bleached furnish will have better optical properties and better whiteness.
  • a non-bleached furnish will have a higher yield and thus cost less.
  • a further development is disclosed as a paper or paper board product in claim 16.
  • a paper or paper board product made according to the disclosed method is lighter for the same volume compared with same product made with same pulp without foamed furnish. In a several ply product it will also be both lighter and have a higher bending stiffness compared with a homogenous paper or paperboard product if added to a middle layer of the product.
  • Chemical fibres in particular in combination with broke gives advantages in terms of time to reach a predetermined air content of the foam.
  • a packaging box product is made from the paper or paper board product it will be lighter and possibly stronger than a product made without foamed furnish. This is a clear advantage as a better economy on natural fibres can be achieved and less weight is needed when transporting and distributing the packaging box.
  • the present invention in related to a method for producing a fibrous web or paper board product.
  • the paper can be any type of paper and the paper board product can be any paper board product. Preferred is a paper board product.
  • the method involves the step of providing a furnish.
  • the furnish comprises a pulp.
  • the pulp could be any pulp but it is preferred that the furnish comprises a chemical pulp. That is a pulp that has been produced by an essentially chemical process, such as the Kraft pulp process or a sulphite process.
  • a surfactant the furnish.
  • the surfactant has the ability to provide a foam if the furnish is mixed in a subsequent step.
  • the furnish as produced is then provided to a wire for dewatering and producing a paper or paper board product.
  • the amount of chemical pulp can vary in a preferred way of performing the method there is an amount for 25%-100 % BDT of chemical pulp in the furnish. But more preferred there is a higher amount of chemical pulp such as 50 -100 % or 70-100 % chemical pulp. There can also be at least 85 % chemical pulp BDT in the furnish.
  • the other pulps that can be mixed in are for example CTMP or CMP pulp or TMP.
  • Chemical pulp can also be broke that is prepared from chemical pulp.
  • the meaning is that the fibre content of the furnish has its origin from a process involving chemicals as an essential part of the preparation of the fibres to be used in the furnish.
  • One such process is the KRAFT process.
  • Other processes involve Sulphite cooking.
  • the amount of chemical pulp is 100 % or essentially 100 % BDT, i.e. the fibres of the furnish comes from a previous chemical process.
  • the furnish may be bleached or unbleached.
  • the method can be further developed by adding a sizing agent.
  • sizing agent it is proposed to use AKD or ASA or starch or even mixtures of these.
  • the method can also involve a step of adding starch as a cationic polyelectrolyte. This will indeed augment the strength properties of the paper or board product.
  • step of adding of alum, and/or PVAM and/or Bentonite and/or PAM, and/or Silica can be performed.
  • a filler such as bentonite will help to make the product more cost effective and will also augment the opacity.
  • the type of fibres used in the method is preferred to be a mixture of softwood and hardwood fibres. However both pure soft wood or hardwood pulps can be used.
  • the preferred surfactant used may be an anionic surfactant.
  • the type of anionic surfactant can be anionic and multi charged or anionic with an ethoxylate chain.
  • One preferred surfactant is an anionic surfactant with a hydrophobic alkane section comprising at least 10 carbon atoms, preferably comprising a hydrophilic end comprising sulphur and oxygen, most preferred Sodium Dodecyl Sulphate also known as SDS.
  • SDS Sodium Dodecyl Sulphate
  • One particular advantage of this surfactant is that is particularly fast to reach 50 % air content. As can be seen figure 10 , where it as a consistent performance from below 5 seconds up to near 7 seconds to achieve this. On the X-axis is disclosed the broke content which will be discussed further below.
  • the surfactant used can also be an anionic and multicharged surfactant, such as described below in example 2. Generally it can be called Polyoxyethylene (20) sorbitan monolaurate.
  • the fastest time to reach 50 % air content increases from 30 % broke content and upwards. This is much unexpected.
  • the values for reaching 66 % air content with same furnish as for figure 8 As can be seen in figure 16 the time to reach 66 % air content with same furnish is very linear for the anionic multicharged surfactant. Fastest time is reached at 50 % broke content.
  • the surfactant used can also be an anionic with an ethoxylate chain as seen in example 1 below.
  • the time to reach 50 % air content of the foamed furnish As can be seen the time is lowest for higher amounts of broke from 30 % of broke an onwards. This is as mentioned previously unexpected.
  • the time to reach 66 % aircontent is even more clear on that the more broke that is a great advantage in reaching faster times to 66 % air content.
  • the surfactant can also be a non-ionic, preferably a surfactant comprising multiple EO groups.
  • a fast time to reach 50 % air content in the foamed furnish is archived and also as with previous surfactant 50 % broke content discloses the fastest time.
  • times to reach 66 % air content it can be seen in figure 14 that the time for any content of broke is very linear and also for this surfactant the time to reach 66% air content is faster for 75 % broke content compared with 0 % broke content. See also example 5 below.
  • the surfactant can also be an amphoteric surfactant, such as a surfactant is described in Example 4.
  • a best value of mixing time is reached at 25 % broke content. Also it can be seen that a broke content over 50 % gives lower values of mixing times to 50 % air content.
  • Figure 15 discloses the times for mixing to 66 % air content for an amphoteric surfactant as seen in example 4. The time for mixing with larger amounts of broke flats out for higher amounts of broke and the derivative of the curve approaches 0.
  • the method is performed by providing the furnish to a wire. This is made with conventional technology on a paper or paper board machine. It is preferred to provide a foamed furnish to a middle layer of the paper or paper board. This gives as seen higher bulk and a thicker paper or paper board.
  • the layers are provided by three or more head boxes that are installed on the paper machine. The outer layers of such a product are preferably not foamed. Thus a sandwiched product is given that has higher bulk in middle layer, see also figure 1, 2 .
  • the first bar on left is refers to a hand sheet made from a furnish with only water and the second bar refers to a hand sheet made from a foamed furnish using an anionic surfactant, and the third bar refers to a hand sheet made from a furnish mixed with a non-ionic surfactant.
  • Example 1 discloses this.
  • the amounts that are advantageous are broke in the amount of 20-90 % BDT more preferred 25-90 % BDT, even more preferred 50 %-90 % BDT, or most preferred 50-75 % BDT.
  • the broke should be defined as being a recycled fibre source that has not been in use for the end product such as a packaging box a paper product or the like. Instead it is a recycled fibre from the production within a paper mill itself. It should also be understood that the broke used has its origin from a pure chemical fibre, if the paper mill is producing products with a pure chemical pulp. Chemical in this context means that it has its origin from for example the KRAFT process in a paper mill or the like. Broke does not mean a recycled fibre that has its origin from for example old prints such as newspapers or the like. In the context of this disclosure the broke comprises, up to 10 % filler. The filler is mainly to be understood to be ground calcium carbonate or kaolinite.
  • binders such as latex, and/or bentonite, and/or colouring agents, and/or carriers of whitening agents, and/or hardeners, and/or fluorescent whitening agent, and/or optical whitening agent, and/or thickeners, and/or viscosity agents, and/or sodium hydroxide, starch, and/or poly vinyl amines, and/or PAM, and/or crosslink agents, and/or silica, and/or alum, and/or PVAM, and/or sizing agents such as AKD or ASA.
  • binders such as latex, and/or bentonite, and/or colouring agents, and/or carriers of whitening agents, and/or hardeners, and/or fluorescent whitening agent, and/or optical whitening agent, and/or thickeners, and/or viscosity agents, and/or sodium hydroxide, starch, and/or poly vinyl amines, and/or PAM, and/or crosslink agents, and/or silica, and
  • Broke is a recycled product with in a paper mill. If the paper mill is using a mixture of other pulps, such as mechanical pulps in its production the amount of chemical fibre in the fibre content of the broke will vary.
  • the chemical fibre content, i.e. pulp content of chemical fibres of the broke may be 25-100 % BDT, preferably 50-100 % BDT, more preferred 70-100 % BDT, more preferred 85-100 % of the pulp, most preferred essentially 100 % BDT of the pulp in the broke.
  • Nanocellulose is defined as a nano-structured cellulose. This may be either cellulose nano fibres (CNF) also called microfibrillated cellulose (MFC), nanocrystalline cellulose (NCC or CNC), or even a bacterial nanocellulose, which refers to nano-structured cellulose produced by bacteria.
  • CNF cellulose nano fibres
  • MFC microfibrillated cellulose
  • NCC nanocrystalline cellulose
  • CNC CNC
  • bacterial nanocellulose which refers to nano-structured cellulose produced by bacteria.
  • CNF is a material composed of nanosized cellulose fibrils with a high aspect ratio (length to width ratio). Typical fibril widths are 5-20 nanometers with a wide range of lengths, typically several micrometers. It is pseudo-plastic and exhibits thixotropy, the property of certain gels or fluids that are thick (viscous) under normal conditions, but become less viscous when shaken or agitated. When the shearing forces are removed the gel regains much of its original state.
  • the fibrils are isolated from any cellulose containing source including wood-based fibres (pulp fibres) through highpressure, high temperature and high velocity impact homogenization, grinding or microfluidization (see manufacture below).
  • Nanocellulose can also be obtained from native fibres by an acid hydrolysis, giving rise to highly crystalline and rigid nanoparticles (often referred to as CNC or nanowhiskers) which are shorter (100s to 1000 nanometers) than the nanofibrils obtained through homogenization, microfluiodization or grinding routes.
  • the resulting material is known as nanocrystalline cellulose (NCC or CNC).
  • the pulps are a pure chemical KRAFT pulp that is a fresh never dried pulp, or a dried pulp and broke from a pure chemical pulp.
  • Figure 5 discloses the amount of broke in relation to the mixing time to reach 50 % air content.
  • the used surfactant was glycolic acid ethoxylate lauryl ether, which is an anionic ethoxylate chain, with the general formula:
  • Table 1 discloses different pulps in a furnish where SW is soft wood and HW is hard wood.
  • the finished product will be ideal for making a packaging box product, with a generally lower density than a conventional paper or paper board.
  • the broke was standard broke from the production of board from chemical pulp. Thus it is broke that is the result of internally recycled paper or paper board products which have been milled gently and water has been added such that a broke furnish has been achieved that then has been mixed with virgin pulp.
  • the broke comprised in addition to fibres from a KRAFT process cooking, fillers, mainly GCC and kaolinite, and/or binders such as latex, and/or bentonite, and/or colouring agents, and/or carriers of whitening agents, and/or hardeners, and/or fluorescent whitening agent, and/or optical whitening agent, and/or thickeners, and/or viscosity agents, and/or sodium hydroxide, starch, and/or poly vinyl amines, and/or PAM, and/or crosslink agents, and/or silica, and/or alum, and/or PVAM, and/or sizing agents such as AKD or ASA.
  • fillers mainly GCC and kaolinite, and/or
  • Figure 7 discloses the improved half time of fibre-foam mixture when considering the same broke amounts. As can be seen for higher amounts of broke the halftime is considerably increased.
  • Figure 8 discloses the amount of broke in relation to the mixing time to reach 50 % air content.
  • the used surfactant was commercially available an anionic multi charged surfactant. With the general formula:
  • the finished product will be ideal for making a packaging box product, with a generally lower density than a conventional paper or paper board.
  • the broke was standard broke from the production of board from chemical pulp.
  • Figure 9 discloses the improved half time of fibre-foam mixture when considering the same broke amounts. As can be seen for higher amounts of broke the halftime is considerably increased.
  • Figure 16 discloses the time for achieving 66 % air content with the chosen surfactant.
  • Example 3 Same furnish and broke was used as in Example 1. Also in example 3 that follows there are an advantage disclosed that is related to what has been discussed regarding SDS and the amount needed in a foam forming process.
  • a furnish comprising 25 % soft wood never dried pulp and 75 % broke pulp was used for adding surfactants. Mixing was performed and surfactant was added until the Vortex closed. The consistency was 1,1 %.
  • Anionic multi charged surfactant required 2,0 g/l of added surfactant.
  • SDS has the general formula:
  • SDS needed very small amounts in order to achieve a good very fast time to 50 % air content as seen in figure 10 . Also as seen in figure 10 the fastest times is achieved around 50 % broke content. Also figure 13 discloses time to reach 66 % air content for the above surfactant. In figure 17 the halftimes of the fain using SDS is disclosed in relation to broke content and the above surfactant.
  • Figure 15 discloses the time to reach 66 % air content for the surfactant above to broke content. As can be seen the lowest times is reached around 50 % broke content. Half times for foamed furnish using the above surfactant in general goes up with higher broke content, see figure 19 for the surfactant of example 4.
  • Example 2 Same furnish and broke was used as in Example 1.
  • An non-ionic surfactant was tested with different amounts of broke in the furnish, this can be seen in figure 11 .
  • the tested broke content gave a fast time to 50 % air content of the foamed furnish when mixing and for 50 % broke content the fastest time was noted.
  • For 66 % aircontent as disclosed in figure 14 a very stable time for achieving 66 % air content was achieved. No large differences are observed. But still for 75 % broke content the fastest time to reach 66 % air content was observed.
  • Halftimes for the foam made to broke content are disclosed in figure 18 for the surfactant of Example 5. As can be seen half time has a local maximum around 50 % broke content.

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EP18159525.7A 2018-03-01 2018-03-01 Procédé de production de toile fibreuse, de papier ou de carton et produit de papier ou de carton Withdrawn EP3533927A1 (fr)

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4571360A (en) * 1985-03-22 1986-02-18 Union Carbide Corporation Foam composition used in paper treatment
WO2012006714A1 (fr) * 2010-07-13 2012-01-19 Fpinnovations Procédé de fabrication d'un composite à densité ultrafaible à l'aide de fibres naturelles
WO2013160553A1 (fr) * 2012-04-26 2013-10-31 Stora Enso Oyj Bande continue fibreuse de papier ou de carton et son procédé de fabrication
WO2013160564A1 (fr) * 2012-04-26 2013-10-31 Stora Enso Oyj Nappe fibreuse collée de manière hydrophobe et procédé de préparation d'une couche de nappe collée
WO2014202841A1 (fr) * 2013-06-20 2014-12-24 Metsä Board Oyj Produit fibreux et procédé de production de voile fibreux
WO2015036930A1 (fr) * 2013-09-13 2015-03-19 Stora Enso Oyj Carton multicouche
WO2015173474A1 (fr) * 2014-05-15 2015-11-19 Metsä Board Oyj Procédé de production de plaques
WO2017006216A1 (fr) * 2015-07-07 2017-01-12 Stora Enso Oyj Plateau ou plaque façonné en matière fibreuse et son procédé de fabrication
WO2018011667A1 (fr) * 2016-07-11 2018-01-18 Stora Enso Oyj Procédé de création d'une mousse à l'aide d'un amidon antimicrobien dans un procédé de fabrication d'un produit en papier ou en carton

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4571360A (en) * 1985-03-22 1986-02-18 Union Carbide Corporation Foam composition used in paper treatment
WO2012006714A1 (fr) * 2010-07-13 2012-01-19 Fpinnovations Procédé de fabrication d'un composite à densité ultrafaible à l'aide de fibres naturelles
WO2013160553A1 (fr) * 2012-04-26 2013-10-31 Stora Enso Oyj Bande continue fibreuse de papier ou de carton et son procédé de fabrication
WO2013160564A1 (fr) * 2012-04-26 2013-10-31 Stora Enso Oyj Nappe fibreuse collée de manière hydrophobe et procédé de préparation d'une couche de nappe collée
WO2014202841A1 (fr) * 2013-06-20 2014-12-24 Metsä Board Oyj Produit fibreux et procédé de production de voile fibreux
WO2015036930A1 (fr) * 2013-09-13 2015-03-19 Stora Enso Oyj Carton multicouche
WO2015173474A1 (fr) * 2014-05-15 2015-11-19 Metsä Board Oyj Procédé de production de plaques
WO2017006216A1 (fr) * 2015-07-07 2017-01-12 Stora Enso Oyj Plateau ou plaque façonné en matière fibreuse et son procédé de fabrication
WO2018011667A1 (fr) * 2016-07-11 2018-01-18 Stora Enso Oyj Procédé de création d'une mousse à l'aide d'un amidon antimicrobien dans un procédé de fabrication d'un produit en papier ou en carton

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