EP2486186A1 - Verfahren zur erzeugung nassverfestigter papiere - Google Patents
Verfahren zur erzeugung nassverfestigter papiereInfo
- Publication number
- EP2486186A1 EP2486186A1 EP10734944A EP10734944A EP2486186A1 EP 2486186 A1 EP2486186 A1 EP 2486186A1 EP 10734944 A EP10734944 A EP 10734944A EP 10734944 A EP10734944 A EP 10734944A EP 2486186 A1 EP2486186 A1 EP 2486186A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- meq
- polymer
- wet strength
- charge density
- strength agent
- 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
Links
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
- D21H21/14—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
- D21H21/18—Reinforcing agents
- D21H21/20—Wet strength agents
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/08—Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/08—Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching
- D21C9/086—Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching with organic compounds or compositions comprising organic compounds
-
- 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
- D21H21/02—Agents for preventing deposition on the paper mill equipment, e.g. pitch or slime control
Definitions
- the present invention relates to a process for producing wet-strength papers, in which a cellulose pulp in addition to a conventional wet strength agent having a charge density of below 6 meq / g polymer, at least one further wet strength agent with a high charge density of at least 5 meq / g polymer for wet-strength fixing of impurities is added to the cellulose fibers.
- This wet strength agent with a high charge density of at least 5 meq / g polymer carries one or more functional groups which undergo covalent bonds during drying, preferably with the reactive hydroxyl groups of the cellulose and / or the impurities.
- Paper is mainly used for printing and writing. Papermakers are often distorted, kinked, and compressed during manufacture and processing on the paper machine during painting, printing, folding, etc., so that they are exposed to forces in both the x and y or z directions. Thus, certain strengths are required so that it does not come to tears, plucking or dusting or holes. In addition to the purely physical wickerwork effect, the forces connecting the individual fibers (hydrogen bonds, van der Waals forces, covalent bonds and ionic interactions) play an important role in the strength of paper.
- composition of the quantitatively most important papers (graphic papers) with high levels of Deinkingstoff, wood pulp and fillers leads to a reduction in the strength of the paper by low single fiber strength (with damage to the fiber wall) or poor fiber-fiber bonding (due to lack of hydrophilicity at a high Lignin content, low bond area at too high filler content or lack of plasticity due to the fiber morphology). For these reasons, it is practically essential to add strength enhancing additives.
- dry strength agents are hydrophilic, water-based soluble, high molecular weight substances, such as unmodified or slightly modified starch (preferably from corn, wheat, potatoes), plant gums (such as guar gum or alginates), carboxymethyl cellulose (CMC) or synthetic polymers. These agents enhance hydrogen bonding or increase the number of bonds between the fibers at their crossing points.
- the classic dry strength agent, the starch is characterized by its favorable price and is preferably applied by means of a glue film press or also added to the composition. Above all, surface application improves primary surface properties such as pick resistance, abrasion resistance, density and smoothness.
- the tensile strength of the paper is mainly due to the hydrogen bonding between the cellulosic fibers.
- the strength of the paper is then only about 10% of the dry strength of the paper at most.
- the embedded water molecules increase the distance between the individual cellulose fibers, giving much of the strength get lost.
- wet strength plays a very important role in addition to the dry strength.
- hygiene products such as tissue paper or toilet paper, filter papers, label papers or tea filters, coffee filters or banknote paper, it is important that these paper products still have some of their original strength even when wet or wet.
- wet strength of paper and board products can only be achieved by using special wet strength agents.
- the wet strength agents are mainly added to the pulp suspension, but may also be added to the surface sizing agent or the coating slip as high molecular weight precondensates. These agents can be either cationic, anionic or non-ionic, resulting in special conditions of use.
- a wet strength agent usually polymers or polyfunctional compounds are used, which react only after the drying of the paper with the OH groups of the pulp fibers and thereby bridge several fibers together. By physical addition of the wet bonding solid polymer bridges are first formed, whereby the reactive groups of the wet strength agent abut the fiber surface and come into close contact with the OH groups of the cellulose.
- urea-formaldehyde resins and melamine-formaldehyde resins Under acidic conditions, the use of urea-formaldehyde resins and melamine-formaldehyde resins in particular has become established. At a pH below pH 5, predominantly urea-formaldehyde resins are used. Under neutral and basic conditions, which are preferred in the paper industry, polyamine-epichlorohydrin resins have proven useful. These have the advantage that they are versatile and are particularly cost-effective. Polyethyleneimines are also used as wet strength agents, although they contain no reactive groups. In addition, resins based on aldehyde-containing polymers are used, although the usefulness of these materials is limited due to the narrow pH range in which they can be used.
- dialdehyde starch, glyoxal and polyacrylamide with glyoxal groups and their copolymers have been established.
- the use of wet strength agent achieves various positive effects.
- the covalent bonding results in increased strength of the paper in the damp or wet state.
- the fiber swelling is prevented in view of the three-dimensional networking. Due to the additional bonds between the fibers, the strength in the dry state is also increased, specifically the dry tensile strength, the bursting resistance, the erasure resistance and the pick resistance.
- cationic polymers which are based for example on polyamides or polyacrylamides have established themselves as wet-strength agents. These wet strength agents are commonly added in the manufacture of tissue paper in amounts of from 8 to 10 kg / t.
- Cationic polymers are predominantly based on polyamide-epichlorohydrin (PAE) and polyamidoamine-epichlorohydrin (PAAE) used (for example in US 2,926.1 16, US 3,733,290, US 4,605,702).
- PAAE polyamide-epichlorohydrin
- PAAE polyamidoamine-epichlorohydrin
- graft copolymers based on polyethylene oxide or polyethylene glycol segments and polyethyleneimine segments has become established, which is described, for example, in DE 10 2004 038 132 B3.
- wet strength agents listed above are used for wet strength, which amounts to amounts of 0.2-5%, based on dry fibers.
- the required quantities are usually much higher.
- wet strength agent use is adversely affected by so-called contaminants, fines, and small fiber debris.
- contaminants, fines, and small fiber debris These mostly anionic substances enter into compounds with the cationic auxiliaries, but these do not contribute anything to the strength structure of the paper. Part of the wet strength agent used is thus lost to the contaminants.
- These impurities are mostly largely harmless in very small amounts, but interfere in higher concentrations. They also lead to the formation of deposits (resin deposits, polymer deposits, deposition of adhesive residue or slime), stains or holes in the paper product.
- the fixing agents form flakes with the solids and suspended matter in the paper suspension.
- the forces between the fixing agent and the impurities are mainly based on electrostatic attraction and hydrogen bonding.
- a high charge density is advantageous for the electrostatic fixation of the contaminants.
- typical fixatives are highly charged, but do not have a very high degree of polymerization. They can also consist of branched molecules that are particularly compact.
- Fixing agents are often cationic polymers, such as polyacrylamides (PAM) polyethylenimines (PE I) or polyvinylamines (PVAm), which have an average molecular weight of up to 5,000 g / mol and a high charge density of up to 15 meq / g polymer at pH 7.
- PAM polyacrylamides
- PE I polyethylenimines
- PVAm polyvinylamines
- a polymer in the chain of which such quaternary ammonium groups are contained is poly-diallyldimethylammonium chloride (DADMAC).
- DADMAC poly-diallyldimethylammonium chloride
- the object of the present invention is to provide a process for producing wet-strength papers which ensures increased wet strength with lower wet strength consumption.
- impurities should not only be electrostatically fixed, but be bound covalently to the cellulose (wet-strength), so that these impurities no longer have a negative effect on the other additives.
- the cellulose pulp in addition to a conventional wet strength agent with a charge density of less than 6 meq / g polymer at least one other
- a wet strength agent having a high charge density of at least 5 meq / g of polymer is added for wet strength fixing of contaminants to the cellulosic fibers.
- This wet strength agent with a high charge density of at least 5 meq / g polymer carries one or more functional groups, ie the dry-covalent bonds of the same with the reactive hydroxy groups of the cellulose and / or accept the impurities.
- the conventional wet strength agent with a charge density below 6 meq / g polymer preferably has a charge density of less than 5 meq / g polymer, more preferably between 0.2 and 4 meq / g polymer.
- the molecular weight is preferably 10,000 to 500,000 g / mol, more preferably 30,000 to 200,000 g / mol. Any conventional wet strength agent can be used here.
- the wet strength agent having a high charge density of at least 5 meq / g of polymer preferably has a charge density of at least 6 meq / g of polymer, more preferably 7 meq / g of polymer.
- the molecular weight is preferably between 5,000 and 400,000 g / mol, more preferably between 10,000 and 100,000 g / mol.
- the contaminants and fines are first bound to the fibers as in a conventional contaminant fixative.
- the electrostatic fixing is replaced by permanent covalent bonds when drying the paper due to the high charge density of the wet strength agent with a high charge density of at least 5 meq / g polymer.
- wet strength agent with a high charge density of at least 5 meq / g polymer first, the thick or already in the pulper or afterwards, and in a further step the wet strength agent with a charge density of less than 6 meq / g polymer .
- This early addition has the advantage that even at this stage all impurities and fiber residues can be bound to the cellulose fibers and not remain unbound in the paper machine system and free for bonds.
- the efficiency of the wet strength agent with a high charge density of at least 5 meq / g polymer is further enhanced if shear forces still act on the fiber suspension after metering because it reacts faster with the cellulosic fibers than the wet strength agent with a charge density below 6 meq / g polymer.
- the wet strength agent with a high charge density of at least 5 meq / g polymer and the wet strength agent with a charge density below 6 meq / g polymer before use. It may be advantageous if the two components are already offered as a ready mix. Alternatively, it is possible to mix the two wet strength agents directly on site in papermaking. It is particularly advantageous if the ratio between the wet strength agent with a high charge density of at least 5 meq / g polymer and the wet strength agent with a charge density of less than 6 meq / g polymer 1: 5 to 1: 20, preferably 1: 8 to 1 : 15, more preferably 1:10.
- the process according to the invention has numerous advantages over the processes described in the prior art for the production of wet-strength papers:
- the paper machine system is efficiently freed from fillers, fines and contaminants. Screen stains caused by sticky contaminants (from waste paper stock, spine, glue, etc. stickies) or resin particles are reduced.
- the retention and drainage is improved because the contaminants can no longer interact with the additives.
- the amount of additives used can be reduced.
- energy can also be saved in the form of steam, as the paper now dries better.
- the resulting paper product has a significantly increased wet strength and dry strength compared to untreated paper. By using smaller amounts of wet strength agent, the chlorine content in the paper is also drastically reduced, which is also desirable.
- wet strength agent with a high charge density of at least 5 meq / g polymer only very small amounts are used. Less than 1% by weight of the wet strength agent with a high charge density of at least 5 meq / g of polymer is used, preferably less than 0.3% by weight, particularly preferably 0.08 to 0.12% by weight, based in each case on dry fibers.
- the amount of added wet strength agent having a charge density of less than 6 meq / g polymer is between 1 and 2% by weight according to the processes described in the prior art. This amount can also be reduced by the method according to the invention. Wen less than 5% by weight of the wet strength agent with a charge density of less than 6 meq / g polymer are used, preferably 0.5 to 2% by weight, particularly preferably 0.8 to 1, 2% by weight, based in each case on dry fibers.
- the wet strength agent with a high charge density of at least 5 meq / g polymer should bind mainly anionic substances firmly to the fibers. This requires a large number of func- tional groups and cationic charges. For the electrostatic fixing a high charge density in a small space is favorable. Therefore, typical fixatives are highly charged, but do not have a very high degree of polymerization, but can also consist of branched molecules.
- the wet strength agent used with a high charge density of at least 5 meq / g polymer preferably has one Charge density of at least 6 meq / g of polymer, more preferably of at least 7 meq / g of polymer. Since the cellulose fibers carry a negative charge, the use of strong cationic wet strength agents is preferable. It is preferable to use wet strength agents which are crosslinked and branched.
- a wet strength agent having a high charge density of at least 5 meq / g of polymer which combines the properties of an impurity fixative and a wet strength agent.
- the contaminants are not only electrostatically fixed, but also covalently linked after drying of the paper with the cellulose fibers.
- this wet strength agent with a high charge density of at least 5 meq / g polymer is always a copolymer bearing both highly charged groups and reactive groups capable of covalent linkage.
- all components of conventional fixatives come into question.
- DMAC diallyldimethylammonium chloride
- Epoxy resins, polyamine resins, isocyanate resins, formaldehyde resins, melamine-formaldehyde resins, urea-formaldehyde resins, dialdehyde starch or glyoxal and glutaraldehyde are preferred here. Particularly preferred is the use of epichlorohydrin resin or polyamine resin. Again, all combinations of copolymers are conceivable.
- a mixture of a wet strength agent with a high charge density of at least 5 meq / g polymer and at least one further wet strength agent with a charge density of less than 6 meq / g polymer for carrying out the method according to the invention is part of the invention.
- the ratio between the wet strength agent having a high charge density of at least 5 meq / g polymer and the wet strength agent having a charge density of below 6 meq / g polymer is 1: 5 to 1:20, preferably 1: 8 to 1:15, more preferably 1:10.
- This mixture can be used instead of a conventional wet strength agent for the production of wet-strength papers.
- this mixture has the advantage that less wet strength needs to be used than in a conventional process. Furthermore, with the aid of this mixture due to the wet strength agent with a high charge density of at least 5 meq / g polymer impurities can be covalently bonded to the cellulose fibers, so that they can no longer interact with other additives and no wet strength agent is wasted by binding to contaminants. Thus, up to 55% of wet strength agent can be saved.
- the paper produced by the process according to the invention is likewise part of the invention.
- This paper has a significantly increased wet strength, making it ideal for use on tissue products such as toilet paper, sanitary crepe, laminate paper, coffee and tea filters.
- the paper produced by the process according to the invention receives a completely novel, hitherto unknown matrix in which a structure wet-strength bonds between short-chain and long-chain molecules, with high and low charge density. For the first time, the impurities are covalently bound to the cellulose fibers.
- wet strength agent having a high charge density of at least 5 meq / g of polymer bearing one or more functional groups that undergo covalent bonding with the cellulose during drying is included as an additive during the process of wet strength in the process of the invention .
- This wet strength agent with a high charge density of at least 5 meq / g polymer allows for the first time the covalent bonding of contaminants to the cellulose fibers and thus a significant saving of the wet strength agent used.
- the wet strength agent having a high charge density of at least 5 meq / g of polymer bearing one or more functional groups which covalently bond with the cellulose during drying as an additive during the dry consolidation process (preferably by means of polyacrylamides or Polyvinyl alcohol).
- This use of the wet strength agent with a high charge density of at least 5 meq / g polymer is also part of the invention.
- the use of this wet strength agent with a high charge density of at least 5 meq / g polymer allows the covalent attachment of contaminants to the cellulose fibers and thereby a significant saving of the dry strength agent used. Thus, both increased dry and increased wet strength of the treated paper are achieved.
- the advantageous embodiments of the method according to claims 2 to 6 and 9 to 11 according to the invention can be applied analogously to the use of the wet strength agent with a high charge density of at least 5 meq / g polymer in the dry consolidation process. Examples:
- the tested leaves (Buchesulfid / Fichtesulfid 50%, ground / unground 50%) were prepared according to DIN 54358.
- the strengths were determined using a horizontal tensile tester that can determine both wet and dry strengths.
- a paper strip of 50 mm width was inserted into the pneumatic sample clamps, then lowered into a immersion tank filled with water (20 ° C.) and watered for 1 5 s. After the prescribed washing time, the sample was pulled out of the water basin and stretched until a break occurred.
- the dry strength was determined using a 15 mm wide paper strip according to DIN 531 12.
- Wet strength agent 1 (with a charge density below 6 meq / g polymer):
- Epichlorohydrin wet strength agent 2 (high charge density of at least 5 meq / g polymer): Strong cationic wet strength agent in an aqueous solution containing 55% by weight of a cross-linked epichlorohydrin-dimethylamine-ammonium terpolymer having a charge density of 7.27 meq / g polymer.
- Dry agent 1 :
- Dry strength agent 1 43.03 1 12.29% 1, 24% 100.76% 0 0.00% 1.22%
- Dry strength agent 1 59.97 156.50% 1, 44% 1 17.07% 4.51 71, 70% 1.22% +
- Dry strength agent 1 64.35 167.93% 1, 68% 136.59% 10.44 165.98% 1.22% +
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200910044228 DE102009044228B4 (de) | 2009-10-09 | 2009-10-09 | Verfahren zur Erzeugung nassverfestigter Papiere |
PCT/EP2010/059759 WO2011042227A1 (de) | 2009-10-09 | 2010-07-07 | Verfahren zur erzeugung nassverfestigter papiere |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2486186A1 true EP2486186A1 (de) | 2012-08-15 |
EP2486186B1 EP2486186B1 (de) | 2016-08-31 |
Family
ID=42962734
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10734944.1A Not-in-force EP2486186B1 (de) | 2009-10-09 | 2010-07-07 | Verfahren zur erzeugung nassverfestigter papiere |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2486186B1 (de) |
DE (1) | DE102009044228B4 (de) |
WO (1) | WO2011042227A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010020249A1 (de) | 2010-05-11 | 2011-11-17 | Cs Compact System Gmbh | Verfahren zur Emulgierung von Leimungsmitteln für die Papierherstellung, Verwendung von Polymeren sowie emulgierbereite Mischung |
US9562326B2 (en) * | 2013-03-14 | 2017-02-07 | Kemira Oyj | Compositions and methods of making paper products |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL110447C (de) | 1957-09-05 | |||
US3733290A (en) | 1970-10-12 | 1973-05-15 | American Cyanamid Co | Polyamidepolyamine-epichlorohydrin wet strength resin |
US4461858A (en) | 1980-05-16 | 1984-07-24 | E. I. Du Pont De Nemours And Company | Polyvinylalcohol/melamine-formaldehyde interaction products |
US4605702A (en) | 1984-06-27 | 1986-08-12 | American Cyanamid Company | Temporary wet strength resin |
US6511579B1 (en) * | 1998-06-12 | 2003-01-28 | Fort James Corporation | Method of making a paper web having a high internal void volume of secondary fibers and a product made by the process |
US6103065A (en) * | 1999-03-30 | 2000-08-15 | Basf Corporation | Method for reducing the polymer and bentonite requirement in papermaking |
CN100436707C (zh) * | 2001-06-11 | 2008-11-26 | 巴斯福股份公司 | 用于纸张的湿强度整理剂 |
DE10319738A1 (de) * | 2003-04-30 | 2004-11-18 | Basf Ag | Verfahren zur Herstellung von wässrigen Dispersionen von Polyelektrolytkomplexen und ihre Verwendung zur Erhöhung der Naßfestigkeit von Papier, Pappe und Karton |
DE102004038132B3 (de) | 2004-08-05 | 2006-04-13 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Papiererzeugnis mit erhöhter relativer Nassreißfestigkeit und Weichheit, Verfahren zu dessen Herstellung sowie dessen Verwendung |
US7863395B2 (en) * | 2006-12-20 | 2011-01-04 | Georgia-Pacific Chemicals Llc | Polyacrylamide-based strengthening agent |
-
2009
- 2009-10-09 DE DE200910044228 patent/DE102009044228B4/de not_active Expired - Fee Related
-
2010
- 2010-07-07 WO PCT/EP2010/059759 patent/WO2011042227A1/de active Application Filing
- 2010-07-07 EP EP10734944.1A patent/EP2486186B1/de not_active Not-in-force
Non-Patent Citations (1)
Title |
---|
See references of WO2011042227A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP2486186B1 (de) | 2016-08-31 |
DE102009044228B4 (de) | 2012-08-16 |
DE102009044228A1 (de) | 2011-05-05 |
WO2011042227A1 (de) | 2011-04-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE69808338T2 (de) | Kreppklebemittel und verfahren zur herstellung von krepppapier | |
DE69929307T2 (de) | Kreppklebemittel und verfahren zum kreppen von papier | |
EP0910701B1 (de) | Verfahren zur herstellung von papier und karton | |
EP2443284B1 (de) | Verfahren zur erhöhung der trockenfestigkeit von papier, pappe und karton | |
DE60034819T2 (de) | Hydroxy-phenoxyetherpolymere in der papierherstellung | |
EP0948677B1 (de) | Verfahren zur herstellung von papier | |
DE68917069T2 (de) | Trockenfestigkeitszusatz für Papier. | |
DE69704935T2 (de) | Additive zur zeitweilige nassfestigkeit | |
DE60035071T2 (de) | Nassverfestigungsmittel und Verfahren zu seiner Herstellung | |
DE69930005T2 (de) | Verfahren zur herstellung von fasern oder gruppen von fasern die mit polymeren beschichtet sind, die untereinander wechselwirken. | |
EP1753914B1 (de) | Verfahren zur herstellung von gekrepptem papier | |
EP1819875A2 (de) | Verfahren zur herstellung von papieren mit hohen fl[chengewichten | |
EP2038478A2 (de) | Verfahren zur ausrüstung von papier und papierprodukten | |
EP2334871B1 (de) | Verfahren zur herstellung von papier, pappe und karton unter verwendung von endo-beta-1,4-glucanasen als entwässerungsmittel | |
DE69210794T2 (de) | Neue kationische Polyaminen als Hilfsmittel für Entwässerung und als Stabilizatore für Kolophonum enthaltende Leimungsmittel | |
DE60130451T2 (de) | Papierfaserstoff und flockungsmittel, die ein saures wässriges aluminumoxidsol enthalten | |
EP2486186B1 (de) | Verfahren zur erzeugung nassverfestigter papiere | |
DE2741627A1 (de) | Halbsynthetisches papier und verfahren zu dessen herstellung | |
WO2006015698A1 (de) | Papiererzeugnis mit erhöhter relativer nassreissfestigkeit und weichheit, verfahren zu dessen herstellung sowie dessen verwendung | |
DE1770150A1 (de) | Nassfestigkeitsharz auf Polyacrylamidbasis und damit hergestelltes Papier | |
DE69926509T2 (de) | Tertiäre amine polyamidoamin - epihalohydrin- polymere | |
EP1315545A2 (de) | Einsatz von polyisocyanatharzen in filterschichten | |
DE19520804C3 (de) | Cellulosepartikel, die im Innern kationische Gruppen aufweisen, Verfahren zu ihrer Herstellung und ihre Verwendung | |
DE102011088202B4 (de) | Verfahren zur prozesswasserreinigung | |
DE2121198B2 (de) | Verfahren zur Rückgewinnung von Faserstoffen und Füllstoffen aus in der Papierindustrie anfallenden Abwässern |
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 |
|
17P | Request for examination filed |
Effective date: 20120509 |
|
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 SE SI SK SM TR |
|
DAX | Request for extension of the european patent (deleted) | ||
17Q | First examination report despatched |
Effective date: 20150820 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
INTG | Intention to grant announced |
Effective date: 20160317 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
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 SE SI SK SM TR |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D Free format text: LANGUAGE OF EP DOCUMENT: GERMAN |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 502010012306 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: REF Ref document number: 825080 Country of ref document: AT Kind code of ref document: T Effective date: 20161015 |
|
REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG4D |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: MP Effective date: 20160831 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LT 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: 20160831 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: 20160831 Ref country code: FI 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: 20160831 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: 20161130 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE 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: 20160831 Ref country code: LV 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: 20160831 Ref country code: NL 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: 20160831 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: 20161201 Ref country code: ES 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: 20160831 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
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: 20160831 Ref country code: EE 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: 20160831 |
|
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: 20160831 Ref country code: DK 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: 20160831 Ref country code: BG 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: 20161130 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: 20160831 Ref country code: PT 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: 20170102 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: 20160831 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: 20160831 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 502010012306 Country of ref document: DE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT 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: 20160831 |
|
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: 20170601 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SI 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: 20160831 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 502010012306 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20170707 |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: MM4A |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20180330 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20170707 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20170731 Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20170707 Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20170731 Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20180201 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20170731 |
|
REG | Reference to a national code |
Ref country code: BE Ref legal event code: MM Effective date: 20170731 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20170707 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20170731 |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: MM01 Ref document number: 825080 Country of ref document: AT Kind code of ref document: T Effective date: 20170707 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MT 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: 20160831 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AL 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: 20160831 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20170707 |
|
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: 20100707 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: 20160831 |
|
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 NON-PAYMENT OF DUE FEES Effective date: 20160831 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MK 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: 20160831 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: TR 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: 20160831 |
|
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: 20161231 |