EP4144914A1 - Papier multicouche contenant du vieux papier et des fibres supplémentaires - Google Patents

Papier multicouche contenant du vieux papier et des fibres supplémentaires Download PDF

Info

Publication number
EP4144914A1
EP4144914A1 EP21195241.1A EP21195241A EP4144914A1 EP 4144914 A1 EP4144914 A1 EP 4144914A1 EP 21195241 A EP21195241 A EP 21195241A EP 4144914 A1 EP4144914 A1 EP 4144914A1
Authority
EP
European Patent Office
Prior art keywords
fibers
paper
weight
proportion
additional
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.)
Granted
Application number
EP21195241.1A
Other languages
German (de)
English (en)
Other versions
EP4144914B1 (fr
EP4144914C0 (fr
Inventor
Hans WEHRMANN
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.)
Certina Production Ag
Wehrmann Hans
Original Assignee
Papierfabrik Meldorf GmbH and Co KG
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 Papierfabrik Meldorf GmbH and Co KG filed Critical Papierfabrik Meldorf GmbH and Co KG
Priority to ES21195241T priority Critical patent/ES2982071T3/es
Priority to EP21195241.1A priority patent/EP4144914B1/fr
Priority to CN202280059923.7A priority patent/CN117916422A/zh
Priority to US18/686,920 priority patent/US20250019903A1/en
Priority to PCT/EP2022/071240 priority patent/WO2023036512A1/fr
Publication of EP4144914A1 publication Critical patent/EP4144914A1/fr
Application granted granted Critical
Publication of EP4144914B1 publication Critical patent/EP4144914B1/fr
Publication of EP4144914C0 publication Critical patent/EP4144914C0/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/30—Multi-ply
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/30—Multi-ply
    • D21H27/38—Multi-ply at least one of the sheets having a fibrous composition differing from that of other sheets
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/14—Secondary fibres
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/01—Waste products, e.g. sludge

Definitions

  • the invention relates to a multi-ply, in particular two-ply, paper, in particular for use in the production of corrugated cardboard, according to the preamble of claim 1.
  • the invention also relates to a method for producing such a paper.
  • waste paper fibers are also used for paper production, ie fibers that are obtained from paper recovered from the recycling circuit, the waste paper.
  • waste paper fibers is advantageous from an environmental point of view as it allows a second cycle or even several more cycles of the fiber material. On the one hand, the waste paper can be recycled as a valuable raw material, on the other hand, fewer fresh fibers are required for paper production, so that less wood has to be taken from nature.
  • waste paper fibers are usually smaller than fresh fibers and therefore, especially if they have already gone through the recycling process several times, result in poorer binding within the paper, and thus a lower tear strength of the paper.
  • waste paper fibers were often mixed with fresh fibers in order to reuse the waste paper on the one hand and to obtain sufficient tear strength of the paper material produced on the other.
  • paper can also be made from pure waste paper, the properties of which not only meet the demands placed on it, for example in terms of tear strength, but which can also be adjusted technologically to the extent that different Qualities with special properties can be produced.
  • Paper made from pure waste paper is used, for example, to later produce corrugated cardboard in a corrugated cardboard plant.
  • the visible layer or top layer can be made of white waste paper in order to produce a visually attractive and suitable layer for later printing of this layer , is applied, consist of simple brown waste paper, which does not have to meet high optical requirements.
  • white waste paper is a high-priced raw material compared to brown waste paper, the consumption of which is reduced when the paper is produced in multiple layers, in particular in two layers.
  • An intermediate layer (or also several intermediate layers) can be provided in particular in order to prevent the rear layer from showing through the cover layer.
  • grass fibers are fibers that are obtained from dried, semi-dried or fresh grass and/or sour grass and/or seaweed and/or algae by appropriate processing. Since these fibers are significantly shorter compared to virgin fibers or waste paper fibers and bond to one another significantly less firmly in a paper layer, the production of paper from 100% such fibers has not been possible, at least up to now.
  • grass fibers are added to the fiber compositions in paper production. Compared to fresh fibres, grass fibers have two advantages: on the one hand they are cheaper than fresh fibres.
  • the price for 1 ton of fresh fibers is around €800 to €1000 compared to a price for 1 ton of grass fibers of around €300 to €400.
  • grass fibers are more environmentally friendly than fresh fibers because they can be obtained from a raw material that grows much faster.
  • the advantage is reduced to environmental friendliness alone.
  • the grass fibers are superior to the waste paper fibers in terms of environmental friendliness, since waste paper fibers are often afflicted with ink residues, and thus in the Papermaking process Bring in chemicals, often mineral oil based chemicals, from the printing process that pollute the process, especially the waste water.
  • waste paper is again significantly cheaper than grass fibers (the current average price for 1 t of waste paper is around €80-140).
  • Paper with added grass fibers is currently in high demand due to its environmental friendliness, e.g. from the packaging industry, where packaging made from paper provided with grass fibers, so-called grass paper, is used in particular in the secondary packaging of organic food.
  • grass paper which has a greenish appearance on one visible side due to the added grass fibers and partially allows the individual grass fibers to be seen as particles, the customer recognizes the packaging made from this paper as environmentally friendly and sustainable, so that the overall concept of food produced in an environmentally friendly manner and environmentally friendly and sustainably manufactured packaging. This applies in particular if the actual carrier fiber of the paper is not fresh fibres, but waste paper fibers that support the idea of recycling.
  • the inventors have set themselves the task of developing a paper obtained using waste paper fibers and additional fibers obtained from environmentally friendly, rapidly renewable raw materials, which, while retaining the technological properties, such as in particular tear strength, of the paper has a higher proportion of additional fibers obtained from renewable raw materials can contain, or while maintaining the proportion of additional fibers obtained from rapidly renewable raw materials, improved technological properties of the paper can be obtained.
  • a visible surface in particular should continue to have an attractive appearance and also one that shows the high proportion of additional fibers obtained from environmentally friendly, rapidly renewable raw materials.
  • this object is achieved by a paper, in particular for use in the production of corrugated board, which is formed from at least two layers couched together and having different compositions.
  • a first layer of paper forms a base layer, and a second layer of paper forms a cover layer.
  • the paper also contains waste paper fibers and additional fibers in the form of fibers other than waste paper fibers.
  • the special feature of the paper according to the invention lies in the fact that the additional fibers contain at least a proportion of fibers from the Silphium perfoliatum ( Silphium perfoliatum ) , fibers obtained from fruits and/or the bark of trees of the baobab genus (Adansonia) , fibers from plants of the genus Cannabis- derived fibers and/or from residues of Contain fibers originating from biogas plants.
  • No additional fibers can be contained in the base layer, but it can also contain a proportion of additional fibers of up to 60% by weight.
  • the top layer contains additional fibers, with a minimum proportion of 8% by weight.
  • the maximum proportion of additional fibers in the top layer can be 80% by weight.
  • the proportion of additional fibers in the top layer is higher than the proportion of additional fibers in the base layer. It can, for example, be at least 5% by weight, in particular at least 10% by weight, particularly preferably at least 15% by weight, higher than the proportion of additional fibers in the base layer.
  • a proportion of additional fibers in the top layer can be, for example, at least 20% by weight, 30% by weight, 40% by weight, 50% by weight, 60% by weight or 70% by weight.
  • the maximum proportion of additional fibers in the top layer can be, for example, 70% by weight, 60% by weight, 50% by weight, 40% by weight or 30% by weight.
  • top layer itself does not have to form the stability that supports the system, but is carried by the base layer
  • additional fibers with poor values in terms of fiber length and fibril density can also be used here, such as sweet grass and/or sour grass and/or sea grass and/or grass fibers obtained from grass fibers or algae, so the cover layer can in particular also form a visually appealing visible side of the paper that emphasizes the proportion of additional fibers.
  • Fibers in the additional fibers which can also be formed entirely by such fibers mentioned above, have this Inventor found out leads to a significant improvement in the technological properties of the paper thus obtained.
  • either more additional fibers obtained from rapidly renewable raw materials including in particular plant raw materials to be harvested at least once a year, can be used without impairing the technological properties compared to a known grass paper, or improved properties can be obtained with the same amount of use .
  • these can also be obtained from fermentation residues from biogas plants, since this plant is also used as an energy source when feeding biogas plants.
  • Fibers obtained from fruits and/or the bark of trees of the baobab genus have also proven to be advantageous additional fibers, since these too have a longer fiber length and greater fibril density than, in particular, the grass fibers described in more detail above.
  • these fibers can also improve the technological properties of the paper obtained in this way, or with the use of these fibers higher proportions of rapidly renewable raw materials can be used.
  • the fruits of trees of the genus Adansonia such as fruits of trees of the species Adansonia digitata (African baobab) have always been used for human nutrition.
  • the fibers contained in the fruit are separated from the actual pulp, which is used for consumption, and are therefore a waste product, so to speak.
  • the fibers of the bark of trees of the Adansonia genus can also be harvested sustainably, in particular without weakening the tree itself excessively or even endangering it, and are therefore also suitable for the production of sustainable paper material.
  • the species mentioned above, Adansonia digitata is not the only one that can be used to obtain fiber from fruit and/or bark.
  • Adansonia genus also come into consideration, such as the species Adansonia grandidieri, Adansonia suarezensis, Adansonia gregorii, Adansonia madagascariensis, Adansonia perrieri, Adansonia rubrostipa and/or Adansonia za.
  • Fibers obtained from plants of the Cannabis genus also have similarly favorable properties in the form of comparatively long fiber lengths and high fibril density.
  • These are types of hemp.
  • the fibers of plants of all known types of hemp can be used, in particular the type Cannabis sativa in all known variants or subspecies as well as the species Cannabis indica in all known variants or subspecies.
  • grass fibers are used, then they can, for example, as in EP 2 825 699 A1 described, in order to be used in the fiber composition, whereby the grass material does not necessarily have to be pelleted, but can also be added as loose bulk material.
  • a processing of the grass for the production of grass fibers used in the invention can continue according to the DE 10 2013 114 386 A1 take place.
  • the proportion of fibers from the Silphie ( Silphium perfoliatum ) , fibers obtained from fruits and/or the bark of trees of the baobab genus (Adansonia) , fibers obtained from plants of the Cannabis genus and/or from residues of Biogas plants originating fibers in the fiber composition of the top layer at least 5 wt .-%, based on the dry weight of the total fibers introduced in the top layer.
  • the layer forming the cover layer with the high proportion of additional fibers can not only be kept stable in a paper machine until couched with the layer forming the base layer, but this layer with the high proportion of additional fibers can also be adequate by couching firmly connected to the layer forming the base layer.
  • the fibers silphium Silphium perfoliatum
  • fibers obtained from the fruit and/or bark of trees of the baobab genus (Adansonia) fibers obtained from plants of the genus Cannabis and/or fibers originating from biogas plant residues, which are used in bonding couching is also beneficial, a manageable splitting strength can be achieved for further processing and use of the paper.
  • the paper can also contain more than two layers, and in particular one or more intermediate layer(s) can be provided between the base layer and the top layer.
  • couching the top layer with the base layer is to be understood as couching the top layer with the intermediate layer(s), couching the intermediate layers with one another and couching the intermediate layer facing the base layer with the base layer.
  • intermediate layers can also contain additional fibers and are preferably at least predominantly based on fibers obtained from waste paper, and at most have a small, preferably no, proportion of fresh fibers.
  • the base layer does not necessarily have to be an outer layer either; it can also be covered on both sides with further layers and couched with them.
  • the material of the additional fibers can be pelleted or used as loose bulk material and added to the process.
  • the base layer provides the required stability of the paper. It will therefore advantageously have a high proportion of waste paper fibers, in particular those of high fiber quality, and can also consist of 100% waste paper fibers.
  • the additional fibers added to the base layer in turn have a high proportion of fibers from the Silphie ( Silphium perfoliatum), fibers obtained from the fruit and/or the bark of trees of the baobab genus (Adansonia) , fibers obtained from plants of the Cannabis genus and/or fibers from Residues from biogas plants may have fibers that, as the inventors have found, cause better technological properties of the paper due to the longer fiber lengths and/or higher fibril density.
  • the composition of the additional fibers added can be designed differently in the two layers.
  • the proportion of additional fibers in the base layer can be, for example, between 20% by weight and 50% by weight, but it can also be less.
  • the maximum proportion of additional fibers in the base layer can also be further limited to, for example, 35% by weight or 30% by weight.
  • no additional fibers are contained in the base layer at all or only small proportions such as 5% by weight, 10% by weight or 15% by weight or only a maximum of one proportion in each case in the specified size.
  • a minimum proportion of waste paper fibers in the base layer can be set at 20% by weight, in particular at 40% by weight, particularly preferably at 60% by weight, but also correspondingly higher, in particular as a remaining amount
  • the remainder is 100% by weight, in each case corresponding to the proportions of additional fibers mentioned above.
  • the base layer and also the cover layer can be produced in particular without the addition of fresh fibers.
  • the proportion of additional fibers and also the proportion of with these added fibers of Silphium ( Silphium perfoliatum ) , fibers obtained from fruits and/or the bark of trees of the baobab genus (Adansonia) , fibers obtained from plants of the Cannabis genus and/or fibers originating from residues of biogas plants in the base layer is generally set according to the requirements for the mechanical properties, in particular the tear strength, of the paper on the one hand and for a total proportion of additional fibers in the paper to be set on the other hand. If inexpensive paper is required, the proportion of additional fibers in the base layer is currently rather low, preferably zero, since, as mentioned above, the price for waste paper is currently significantly lower than the price for the material of the additional fibers. If there is a change or even a reversal in price trends, a different prioritization can of course prevail and, from a cost perspective, a high proportion of additional fibers can also be aimed for in the base layer.
  • the top layer should have as high a proportion as possible, in any case a clearly higher proportion, of additional fibers obtained in particular from rapidly renewable raw materials, in order to be able to increase the total proportion of additional fibers in the paper and/or the top layer should have the appearance of a paper mixed with a high proportion of such additional fibers to rent.
  • the top layer also usually requires a proportion of other fibers, preferably waste paper fibers, for minimum strength, in particular also during the manufacturing process.
  • the maximum proportion of additional fibers, in particular the actual proportion of additional fibers can be in a range between 20% by weight and 70% by weight.
  • the minimum proportion of additional fibers in the top layer can be, for example, 25% by weight, 30% by weight, 35% by weight or even 40% by weight, depending on the requirements that the subsequent user places on the paper according to the invention. It is possible, for example, to incorporate 40% by weight, 50% by weight or even 60% by weight of additional fibers in the top layer, or proportions reaching up to such proportions as the maximum proportion.
  • the remaining portion is preferably filled with waste paper fibers.
  • the paper according to the invention can have no fresh fibers or only a small proportion of fresh fibers, typically a maximum of 10 % by weight, in particular a maximum of 5% by weight.
  • the said layers contain different types of waste paper fibers.
  • the top layer can contain waste paper fibers obtained from white waste paper.
  • the base layer can contain brown waste paper fibers that are obtained from a less expensive raw material.
  • the top layer can also contain waste paper fibers from brown waste paper.
  • the waste paper fibers of the base layer can, for example, also be fibers obtained from kraft cardboard or kraft paper, which give the base layer particularly good strength. When choosing such waste paper fibers for the base layer, for example, a particularly high proportion of additional fibers can also be integrated in the base layer.
  • the paper according to the invention can be produced in particular as a paper web in a paper machine. As already mentioned above, it is preferably produced as a paper which is used for use in the further manufacture of corrugated cardboard. For this purpose, but also for other purposes, it can in particular have a basis weight of 80 g/m 2 to 200 g/m 2 , preferably 125 to 175 g/m 2 .
  • the larger portion is accounted for by the backing layer.
  • this can in particular have a basis weight of 60-170 g/m 2 .
  • the cover layer can typically have a weight per unit area of 30-50 g/m 2 .
  • the top layer makes up about 1/4 to 1/3 of the total thickness of the paper, the backing layer contributes about 2/3 to 3/4 of the total thickness of the paper.
  • a firm connection of the couched layers is important for the paper according to the invention.
  • the paper according to the invention has a Cobb 60 value determined according to DIN EN ISO 535 of at most 40 g/m 2 , in particular less than 35 g/m 2 , preferably less than 30 g/m 2 . m 2 .
  • the Cobb 60 value which is a measure of the water absorption of the paper, is set in the manner known in papermaking by adding glue and/or starch to the still wet or damp paper web before drying, which is typically carried out in a pass over drying cylinders .
  • a high absorbency of the paper is required, i.e. a high Cobb 60 value. This is required, for example, for corrugated medium, i.e.
  • a paper according to the invention can be produced in particular in a paper machine.
  • the fiber materials used are first introduced in a manner known per se into separate pulpers, at least one for the material of the base layer and another for the material of the cover layer, in this case at least waste paper fibers are introduced into the pulper for forming the base layer, possibly also Additional fibers and waste paper as well as additional fibers in the pulper for forming the top layer.
  • the Additional fibers can be further treated before they are placed in the pulper or pulpers, in particular ground up in a fibrillating manner.
  • a first fibrous composition which is taken from a first of the pulpers and which may have been sifted again in further separators, refiners and/or chests, and which contains water, waste paper fibers and any additional fibers, but to a maximum Share of 50 wt .-%, based on the dry matter contains applied to a first screen.
  • This fiber composition forms a first layer, the base layer.
  • the proportion of waste paper fibers can be, in particular, at least 60% by weight, based on the dry mass.
  • a second fibrous composition which is taken from a second of the pulpers and which may have been sifted again in further separators, refiners and/or chests and which contains the waste paper fibers in a maximum proportion of less than 80% by weight , based on the dry matter, and additive fibers in a minimum proportion of 20% by weight, based on the dry matter, but in any case a higher proportion of additive fibers than the first fiber composition, applied to a second sieve.
  • the webs formed from the fiber masses on the two wires are brought together after optional initial dewatering and couched to form a two-ply paper web.
  • a fibrous material composition applied to a further wire forms a further web, for example as an intermediate layer, which, after optional initial dewatering, is brought together with the two webs described above.
  • further webs can also be formed and brought together accordingly with the two webs described above.
  • the resulting two- or multi-ply paper web is then further dewatered and finally dried in a manner known in the papermaking process, in particular with drying while passing through drying cylinders.
  • the resulting web-shaped paper is then wound up into a roll and can then be transported and used for further processing.
  • a paper with the proportions by weight of waste paper fibers or additional fibers indicated above can then be achieved. Furthermore, in the production process, in particular a processing of the reject, which is known per se, and a return of the fibers obtained from the reject to the feed of the fibrous composition can be carried out.
  • the proportions of additional fibers and/or waste paper fibers in the fibrous compositions for the production of the two webs for the base layer and the top layer can be selected according to the requirements and in particular with the weight proportions mentioned above in the context of the description of the paper according to the invention.
  • a two-ply paper according to the invention can, for example, contain 75 wt 2 , the top layer contributes 40 g/m 2 of basis weight and contains 50% by weight of additional fibers, contains a total of more than 30% by weight of additional fibers and still shows sufficient stability, in particular tear strength.
  • the top layer with the particularly high proportion of additional fibers shows the addition of this material particularly well and has a corresponding appearance that emphasizes the property of the paper as paper made with such additional fibers obtained from rapidly renewable raw materials.
  • the invention provides a new type of paper and a production method for such a paper, which in the combination of waste paper fibers and additional fibers in the use for the production of such paper due to the use of the stability compared to grass fibers cheaper fibers of Silphie ( Silphium perfoliatum ) , fibers obtained from fruits and/or the bark of trees of the baobab genus (Adansonia) , fibers obtained from plants of the Cannabis genus and/or from residues of Biogas plants originating fibers allows to use an even higher proportion of additional fibers than from the prior art according to the EP 3 683 357 A1 was known without jeopardizing the required technological properties, in particular the stability and tear strength of the paper, and/or in which the side of the paper showing the top layer shows the character of the paper made with fibers made from rapidly renewable raw materials particularly well has optics.
  • FIG 1 a procedure for the production of a paper according to the invention is shown schematically.
  • a paper web 10 is produced in multiple layers, here in two layers.
  • a first paper layer, a base layer 11, is formed by applying a first fibrous composition to a first wire of a paper machine, for example to a bottom wire.
  • a second paper layer, a cover layer 12 is formed by applying a second fiber composition to a second wire of a paper machine, for example to an upper wire.
  • the base layer 11 contains a high proportion of waste paper fibers, for example waste paper fibers in a proportion of at least 60% by weight, based on the dry matter.
  • the top layer 12, on the other hand, is characterized by a high proportion of additional fibers, viz at least 20% by weight in dry matter.
  • the proportion of additional fibers in the cover layer 12 can in particular be between 30 and 70% by weight.
  • the base layer 11 can also contain additional fibers, but this does not necessarily have to be the case.
  • the proportion of additional fibers in the top layer should be limited to a maximum of 50% by weight, preferably to a maximum of 35% by weight, in particular a maximum of 30% by weight. In any case, the proportion of additional fibers in the top layer 12 is higher, in particular significantly higher, than a proportion of additional fibers in the base layer 11.
  • the additional fibers used contain fibers from Silphium ( Silphium perfoliatum), fibers obtained from the fruit and/or bark of trees of the baobab genus (Adansonia) , fibers obtained from plants of the Cannabis genus and/or fibers from residues of biogas plants.
  • the additional fibers can also contain fractions of grass fibers in the form of fibers from sweet grass and/or sour grass and/or seaweed and/or algae and/or fresh fibers.
  • the additional fibers are fibers of Silphium ( Silphium perfoliatum), fibers obtained from the fruit and/or bark of trees of the Adansonia genus, fibers obtained from plants of the Cannabis genus and/or fibers from residues of Containing biogas plants leads to a clearly improved stability, in particular tear strength, of the paper made with these fibers compared to the addition of pure grass fibers. This is due to the longer fibers and higher fibril density of these particular fibers.
  • the remainder of the dry mass in the base layer 11 can preferably be formed entirely by waste paper fibers. In this way, the base layer 11 is formed with sufficient stability to be able to meet the tear strength and also other properties required of the paper of the paper web 10 .
  • the proportion of fibers not formed by additional fibers is preferably also completely realized by waste paper fibers.
  • Virgin fibers are preferably avoided in both layers, the base layer and the top layer.
  • such fresh fibers can be contained in the layers, in particular as components of the additional fibers.
  • the proportion of fresh fibers in the mass of additional fibers is selected to be low, in particular it is already at most 10% by weight or even significantly lower, e.g. below 5% by weight, so that the proportion of such fresh fibers in corresponding to the paper obtained.
  • the top layer 12 per se is not sufficiently stable in such a way and as such does not meet the technological properties that are required of the paper in the paper web 10 .
  • the two-ply paper web 10 is obtained, which - primarily due to the properties of the base layer 11, but also due to the proportion of fibers in the Silphie ( Silphium perfoliatum) growing through, fibers obtained from the fruit and/or bark of trees of the baobab genus (Adansonia) , fibers obtained from plants of the Cannabis genus and/or residues from biogas plants in the additional fibers - the required technological has properties.
  • this paper web 10 is typically wound up on a paper roll 14 .
  • the paper web 10 can in particular have a basis weight of 80 to 200 g/m 2 .
  • the paper can, for example, be of a type that is subsequently used in the production of corrugated cardboard.
  • the base layer 11 can in particular have a basis weight of 60 to 170 g/m 2 .
  • the cover layer 12 can in particular have a basis weight of 30 to 50 g/m 2 .
  • the two-ply paper web 10 preferably has a splitting strength, determined according to the International Scott Bond Test according to DIN ISO 16260, from 180 to 300 J/m 2 , in particular from 220 to 300 J/m 2 .
  • the waste paper fibers used there are fibers obtained from white waste paper.
  • the usually greenish or greenish-brownish or brownish additional fibers can be easily recognized in a white-ground cover layer in particular and are thus well perceived by the viewer of an end product made from the paper according to the invention, which has the cover layer 12 as the visible surface.
  • base layers and surface layers are indicated by the crosses placed in the respective cells.
  • Three different possible composition ranges of base layers are listed, namely, each starting from a base layer consisting of 100% waste paper, such a base layer composed of waste paper and grass fibers (top line), a base layer made of waste paper, grass and other fibers, also possibly Fibers derived from plants of the Cannabis genus, composite base layer (middle row) and a base layer composed of waste paper, hemp and grass fibers (bottom row).
  • the respective proportions of the fibers in the base layers with different compositions are given in % by weight of the composition in the layer and as proportions in the dry mass, with possible ranges.
  • composition ranges of the top layer are shown, in the left column with proportions of waste paper, grass and other fibers as well as fibers possibly obtained from plants of the Cannabis genus.
  • a top layer with a composition of waste paper, grass and other fibers is shown in the middle column.
  • the right-hand column shows a composition range of the top layer made of waste paper, grass and possibly fibers obtained from plants of the Cannabis genus.
  • the respective proportions of the fibers in the differently composed top layers are given in % by weight of the composition in the layer and as proportions in the dry mass, with possible ranges.

Landscapes

  • Paper (AREA)
  • Laminated Bodies (AREA)
EP21195241.1A 2021-09-07 2021-09-07 Papier multicouche contenant du vieux papier et des fibres supplémentaires Active EP4144914B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
ES21195241T ES2982071T3 (es) 2021-09-07 2021-09-07 Papel multicapa que contiene fibras de papel usado y fibras adicionales
EP21195241.1A EP4144914B1 (fr) 2021-09-07 2021-09-07 Papier multicouche contenant du vieux papier et des fibres supplémentaires
CN202280059923.7A CN117916422A (zh) 2021-09-07 2022-07-28 包含旧纸纤维和附加纤维的多层纸
US18/686,920 US20250019903A1 (en) 2021-09-07 2022-07-28 Multi-ply paper containing used paper fibers and additional fibers
PCT/EP2022/071240 WO2023036512A1 (fr) 2021-09-07 2022-07-28 Papier multicouches contenant des fibres de papier utilisées et des fibres supplémentaires

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21195241.1A EP4144914B1 (fr) 2021-09-07 2021-09-07 Papier multicouche contenant du vieux papier et des fibres supplémentaires

Publications (3)

Publication Number Publication Date
EP4144914A1 true EP4144914A1 (fr) 2023-03-08
EP4144914B1 EP4144914B1 (fr) 2024-04-17
EP4144914C0 EP4144914C0 (fr) 2024-04-17

Family

ID=77666204

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21195241.1A Active EP4144914B1 (fr) 2021-09-07 2021-09-07 Papier multicouche contenant du vieux papier et des fibres supplémentaires

Country Status (5)

Country Link
US (1) US20250019903A1 (fr)
EP (1) EP4144914B1 (fr)
CN (1) CN117916422A (fr)
ES (1) ES2982071T3 (fr)
WO (1) WO2023036512A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2825699A1 (fr) 2012-03-13 2015-01-21 D'Agnone, Uwe Composition de matière fibreuse
EP3683357A1 (fr) 2019-01-15 2020-07-22 Papierfabrik Meldorf GmbH & Co. Kommanditgesellschaft Papier multicouche contenant des vieux papiers et des fibres de gazon

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6669814B2 (en) * 2002-03-08 2003-12-30 Rock-Tenn Company Multi-ply paperboard prepared from recycled materials and methods of manufacturing same
CN101760972A (zh) * 2009-12-21 2010-06-30 田金益 串叶松香草的用途及以串叶松香草杆茎为原料的纸浆
ITTO20130711A1 (it) * 2013-09-02 2015-03-03 Biochemtex Spa Composizioni di glicole etilenico bioderivato per bottiglie di poliestere
AU2014348199B2 (en) * 2013-11-18 2017-11-02 Enzymatic Deinking Technologies, Llc Enzymatic treatment of virgin fiber and recycled paper to reduce residual mineral oil levels for paper production
DE102013114386A1 (de) 2013-12-18 2015-06-18 Uwe D'Agnone Verfahren zur Aufbereitung von Gras für die Herstellung von Papier, Pappen und Karton
EP3122941B1 (fr) * 2014-03-28 2019-03-06 SWM Luxembourg s.a.r.l. Matériau végétal reconstitué et son utilisation à des fins d'empaquetage, d'emballage et pour des dispositifs à usage alimentaire
CN107881849A (zh) * 2016-09-30 2018-04-06 凯米罗总公司 用于提高纸张或纸板产品的尺寸稳定性的方法
DE102016222952B4 (de) * 2016-11-21 2018-05-30 Lambert Dustin Dinzinger Verfahren zur Herstellung von Papier, Karton oder Pappe unter Verwendung von Baobabbaumrindenbastfasern und Baobabfruchtfasern als Papierrohstoff sowie Papier, Pappe und Karton und deren Verwendung
US10774473B2 (en) * 2017-05-26 2020-09-15 United States Gypsum Company Compositions and methods with microfibrillated cellulose for wallboard paper
CN112281530A (zh) * 2020-09-22 2021-01-29 黑龙江进化树生物科技有限公司 一种利用秸秆沼渣制作纸张的方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2825699A1 (fr) 2012-03-13 2015-01-21 D'Agnone, Uwe Composition de matière fibreuse
EP3683357A1 (fr) 2019-01-15 2020-07-22 Papierfabrik Meldorf GmbH & Co. Kommanditgesellschaft Papier multicouche contenant des vieux papiers et des fibres de gazon

Also Published As

Publication number Publication date
EP4144914B1 (fr) 2024-04-17
ES2982071T3 (es) 2024-10-14
WO2023036512A1 (fr) 2023-03-16
EP4144914C0 (fr) 2024-04-17
CN117916422A (zh) 2024-04-19
US20250019903A1 (en) 2025-01-16

Similar Documents

Publication Publication Date Title
DE69709664T2 (de) Verfahren zur verbesserung der reissfestigkeit von papierprodukten und resultierenden produkten
DE69609708T2 (de) Sanftes, gekrepptes seidenpapier
DE3720618A1 (de) Verfahren im papierherstellungsprozess zur verbesserung der papiereigenschaften, speziell der retention
EP3683357B1 (fr) Papier multicouche contenant des vieux papiers et des fibres de gazon
AT524260B1 (de) Paletten-Umverpackungspapier
DE102008053858A1 (de) Algen-Faserstoff
AT525436B1 (de) Transparentpapier
DE3879190T2 (de) Ein pflanzenfuellstoff enthaltendes material herabgesetzter dichte.
AT524998B1 (de) Bedruckbares, mehrlagiges Papier für Verpackungen und Verfahren zu dessen Herstellung
EP4144914B1 (fr) Papier multicouche contenant du vieux papier et des fibres supplémentaires
DE3223149C1 (de) Verfahren zur Herstellung von Papier oder dergleichen Werkstoffe
EP3121332B1 (fr) Carton multicouche et procede de fabrication de carton multicouche
DE202019100702U1 (de) Mehrlagiges Altpapier- und Grasfasern enthaltendes Papier
WO2022027080A1 (fr) Procédé de fabrication de produits d'emballage à base de fibres cellulosiques et produit d'emballage à base de fibres cellulosiques
WO2022027081A1 (fr) Procédé de fabrication de produits d'emballage à base de fibres de cellulose et produit d'emballage à base de fibres de cellulose
DE102008057795A1 (de) Verfahren zur Herstellung von Papier, eine Vorrichtung zur Herstellung von Papier und ein entsprechendes Papier
DE69004671T2 (de) Poröser, wenigdichter mikronisierter pflanzlicher füllstoff mit kontrollierter granulometrie und kleinen physikalischen und hydraulischen oberflächenkennzahlen und verfahren zu seiner herstellung.
DE102007062370A1 (de) Verfahren zur Herstellung von Papier, Pappe oder dergleichen Produkten sowie zugehöriges Papier- oder Pappeerzeugnis
EP4018033B1 (fr) Procédé de préparation de fibres d'herbe, en particulier pour la préparation d'un mélange de pâte à papier contenant des fibres d'herbe
EP2821547B1 (fr) Procédé et dispositif de fabrication d'une bande de matière fibreuse multicouches et bande de matière fibreuse multicouches fabriquée de cette manière
EP0493726A1 (fr) Composition fibreuse pour la fabrication du papier, papier obtenu et son utilisation, ainsi que le procédé de fabrication de la composition fibreuse et du papier
DE69407931T2 (de) Produkt auf der Basis von lignozellulosehaltigen Materialien und Verfahren zu seiner Herstellung
WO2025021764A1 (fr) Matériau d'emballage doté d'une barrière à l'oxygène améliorée
EP4368391A1 (fr) Procédé de fabrication d'une feuille de revêtement imprimable pour emballages et feuille de revêtement imprimable pour emballages
DE102024102412A1 (de) Verfahren zur herstellung eines wachsfreien dreheinschlagpapiers

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: WEHRMANN, HANS

Owner name: CERTINA PRODUCTION AG

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20230508

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

INTG Intention to grant announced

Effective date: 20240212

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502021003360

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

U01 Request for unitary effect filed

Effective date: 20240513

U07 Unitary effect registered

Designated state(s): AT BE BG DE DK EE FI FR IT LT LU LV MT NL PT SE SI

Effective date: 20240524

U20 Renewal fee for the european patent with unitary effect paid

Year of fee payment: 4

Effective date: 20240820

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240817

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240417

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240718

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2982071

Country of ref document: ES

Kind code of ref document: T3

Effective date: 20241014

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240417

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240417

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240717

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240817

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240417

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240718

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240717

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502021003360

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240417

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240417

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240417

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240417

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240417

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240417

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240417

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240417

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20250120

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240417

REG Reference to a national code

Ref country code: CH

Ref legal event code: U11

Free format text: ST27 STATUS EVENT CODE: U-0-0-U10-U11 (AS PROVIDED BY THE NATIONAL OFFICE)

Effective date: 20251001

U20 Renewal fee for the european patent with unitary effect paid

Year of fee payment: 5

Effective date: 20250902

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20250923

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20251001

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20210907

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20251020

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20210907