EP0036993A1 - Procédé d'ennoblissement de papier et carton - Google Patents

Procédé d'ennoblissement de papier et carton Download PDF

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Publication number
EP0036993A1
EP0036993A1 EP81101918A EP81101918A EP0036993A1 EP 0036993 A1 EP0036993 A1 EP 0036993A1 EP 81101918 A EP81101918 A EP 81101918A EP 81101918 A EP81101918 A EP 81101918A EP 0036993 A1 EP0036993 A1 EP 0036993A1
Authority
EP
European Patent Office
Prior art keywords
paper
weight
cardboard
copolymers
acrylic acid
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
EP81101918A
Other languages
German (de)
English (en)
Other versions
EP0036993B1 (fr
Inventor
Rudolf Behn
Lutz Dr. Hoppe
Klaus Dr. Szablikowski
Helmut Dr. Huhn
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.)
Dow Produktions und Vertriebs GmbH and Co oHG
Original Assignee
Wolff Walsrode AG
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 Wolff Walsrode AG filed Critical Wolff Walsrode AG
Priority to AT81101918T priority Critical patent/ATE5089T1/de
Publication of EP0036993A1 publication Critical patent/EP0036993A1/fr
Application granted granted Critical
Publication of EP0036993B1 publication Critical patent/EP0036993B1/fr
Expired legal-status Critical Current

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
    • 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
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/41—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups
    • D21H17/42—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups anionic
    • D21H17/43—Carboxyl groups or derivatives thereof

Definitions

  • the invention relates to methods for reinforcing paper and cardboard materials with aqueous solutions of copolymers of acrylonitrile, acrylamide and acrylic acid.
  • Sheets of corrugated cardboard, containers or boxes made of corrugated cardboard, boxes made of cardboard materials or other types of paper or cardboard materials do not have sufficient strength, in particular water resistance, which is required for many purposes.
  • thermoplastic resins such as polystyrenes in solvents or in solvent mixtures are used to reinforce paper or corrugated cardboard: Xylene and other solvents that have to be used in very specific proportions. The recovery of the solvents is difficult and expensive. Xylene is also highly flammable. Such systems are therefore not suitable for continuous working methods.
  • DAS 2 345 982 polymers based on styrene, acrylonitrile, butadiene and acrylate are dissolved in a halogenated hydrocarbon and paper or cardboard materials are treated with this solution for reinforcement.
  • a major disadvantage of this process is that the products must be dissolved in organic solvents, the physiological effects of which are not entirely harmless.
  • Another disadvantage of using the water-insoluble substances is that the paper material must be dried to a water content of below 5% before the treatment in order to allow the organic solutions to diffuse into the paper. This drying is forbidden for economic reasons.
  • the strength of paper materials can now be significantly improved if the surface of the materials is treated with aqueous solutions of copolymers of acrylonitrile, acrylamide and acrylic acid. Since no alkali metal or alkaline earth metal salts, in particular Ca or Mg salts, of the copolymers have to be used, it is also possible to avoid waste water problems.
  • the invention therefore relates to processes for the surface treatment of paper, cardboard and K artonmaterialien with aqueous solutions of copolymers of (meth) acrylic acid derivatives and optionally customary aggregates, characterized in that as co-polymers of used, the sum of 1) - 3) must add up to 100% by weight.
  • copolymer solution used according to the invention can be prepared by known hydrolysis reactions of the polyacrylonitrile in water at elevated temperatures.
  • the production of these water-soluble copolymers from water-insoluble polyacrylonitrile by hydrolysis is described in DTPS 1 207 086 and in DTPS 2031 972.
  • the aqueous solution according to the invention should be 0.5 to 40% by weight. preferably contain 3 - 30 wt .-% of the copolymer.
  • crosslinking agents e.g. formaldehyde and epichlorohydrin
  • suitable cationative compounds which do not cause any incompatibility with the acrylic acid groups of the resin solution, can also be introduced into the resin solution, in order to use e.g. denser types of paper to achieve an even better mounting on the anion-actively charged fiber surface and binding to it.
  • Quaternary ammonium compounds such as e.g. 3-chloro-2-hydroxypropyl-trimethyl-ammonium chloride, modified polyamidoamines or water-soluble polyacrylamides.
  • the surface treatment is preferably carried out by spraying solutions onto the surface of the still wet paper fleece on the paper machine screen, in modern and larger paper machines, predominantly via a surface size press in the dryer section.
  • the aqueous polymer solution is preferably applied to both sides of the paper web in amounts of 0.5-25 g / m 2 copolymer.
  • the paper web is dried in the dryer section of the machine in a customary and environmentally friendly manner to a residual moisture content of 4-8%.
  • foam emulsion which is obtained by incorporating air (if appropriate after adding foam stabilizers) into the aqueous resin solution, to application surfaces to the paper web.
  • Suitable aggregates for applying foam to paper, cardboard or Cardboard materials include the size press, spray nozzles, rollers with suitable doctor blades.
  • a great advantage of the foam applicator compared to the solution application is the slight increase in the moisture content of the paper web, which can increase the reaction rate by up to 30%.
  • the method according to the invention can be used both on corrugated paper materials and on other types of paper or cardboard materials of different basis weights.
  • the aqueous resin solution penetrates into the paper or cardboard material to be treated without the need for any penetrant, so that the material is sufficiently impregnated with the aqueous resin solution in a very short time and has good strength and water resistance.
  • the material treated according to the invention is also well suited for the production of boxes and containers.
  • reinforced core and / or cover layers can also be produced continuously for corrugated cardboard production and then corrugated.
  • a non-surface-treated corrugated material with a basis weight of 123 g / m 2 with a residual moisture content of 5% and a working width of 30 cm and a speed of 4m / min is passed through an application bath, in which contains a 7% by weight aqueous solution of a copolymer consisting of 3% by weight of acrylonitrile, 47% by weight of acrylic acid and 50% by weight of acrylamide.
  • the wound and surface-treated paper has a residual moisture of 5% and a basis weight of 131 g / m 2 , which corresponds to an application of 7.5 g / m 2 on both sides.
  • the foam which is obtained after stirring for 30 seconds in the kitchen mixer, is stable over 15 minutes and shows a volume increase of at least 20% compared to the 7% by weight copolymer solution.
  • This foam is applied to both sides of corrugated paper as indicated in Example 1.
  • the residual moisture is 5%
  • the basis weight is determined with 132 g / m 2 and the application with 8.4 g / m 2 .
  • Example 2 On the same test machine as described in Example 1, a diluted, broken down maize starch suspension, adjusted to 7% by weight, is used for the surface coating of corrugated paper analogous to Example 1.
  • the residual moisture after the drying process of the corrugated paper treated with corn starch is also 5%, the basis weight is determined at 133 g / m 2, which corresponds to an application of 9.4 g / m 2 on both sides.
  • the residual moisture is 5% and the basis weight is determined to be 132 g / m 2 .
  • the double-sided order is 8, 4 g / m 2.
  • a copolymer according to Example 1 of DT-OS 2 741 753 was converted into the corresponding salt with calcium hydroxide.
  • a 7% by weight copoly Merisat salt solution is applied to both sides of corrugated material (paper) as in Example 1.
  • the residual moisture is 5%, the basis weight is determined at 131 g / m 2 and the application at 7.5 g / m 2 .
  • Tables I and II show the physical values of the paper treated in this way.
EP81101918A 1980-03-28 1981-03-16 Procédé d'ennoblissement de papier et carton Expired EP0036993B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81101918T ATE5089T1 (de) 1980-03-28 1981-03-16 Verfahren zum veredeln von papier, pappe und karton.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803012002 DE3012002A1 (de) 1980-03-28 1980-03-28 Verfahren zum veredeln von papier, pappe und karton
DE3012002 1980-03-28

Publications (2)

Publication Number Publication Date
EP0036993A1 true EP0036993A1 (fr) 1981-10-07
EP0036993B1 EP0036993B1 (fr) 1983-10-19

Family

ID=6098595

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81101918A Expired EP0036993B1 (fr) 1980-03-28 1981-03-16 Procédé d'ennoblissement de papier et carton

Country Status (4)

Country Link
EP (1) EP0036993B1 (fr)
JP (1) JPS56148995A (fr)
AT (1) ATE5089T1 (fr)
DE (2) DE3012002A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0193111A2 (fr) * 1985-02-27 1986-09-03 BASF Aktiengesellschaft Procédé de fabrication de papier à résistance élevée à l'état sec
US5890530A (en) * 1995-06-21 1999-04-06 Electrovac, Fabrikation Elektrotechnischer Spezialartikel Gesellschaft M.B.H. Method of making MMC components
EP0953679A1 (fr) * 1998-04-22 1999-11-03 Hymo Corporation Agent de renforcement pour papier et procédé de renforcement de papier
US6159340A (en) * 1996-02-29 2000-12-12 Basf Aktiengesellschaft Hydrolyzed polymers of N-vinylcarboxamides as paper, paperboard and cardboard dry strength enhancers
US6740373B1 (en) * 1997-02-26 2004-05-25 Fort James Corporation Coated paperboards and paperboard containers having improved tactile and bulk insulation properties

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4423118A (en) * 1981-08-20 1983-12-27 The Dow Chemical Company Thickened paper coating composition
US6919111B2 (en) 1997-02-26 2005-07-19 Fort James Corporation Coated paperboards and paperboard containers having improved tactile and bulk insulation properties

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2164902A1 (de) * 1971-12-28 1973-08-02 Freudenberg Carl Fa Verfahren zur herstellung bindemittel gebundener vliesstoffe

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2999038A (en) * 1958-01-24 1961-09-05 Rohm & Haas Method of producing wet-strength papers
FR2108635A5 (en) * 1970-09-29 1972-05-19 Nitto Chemical Industry Co Ltd Paper paste contg acrylic polymer - for improved tear strength
DE2741753B1 (de) * 1977-09-16 1979-03-22 Basf Ag Verfahren zur Herstellung von Papier mit hoher Trockenfestigkeit und niedriger Nassfestigkeit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2164902A1 (de) * 1971-12-28 1973-08-02 Freudenberg Carl Fa Verfahren zur herstellung bindemittel gebundener vliesstoffe

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0193111A2 (fr) * 1985-02-27 1986-09-03 BASF Aktiengesellschaft Procédé de fabrication de papier à résistance élevée à l'état sec
EP0193111A3 (en) * 1985-02-27 1987-05-20 Basf Aktiengesellschaft Process for producing paper with a high dry strength
US5890530A (en) * 1995-06-21 1999-04-06 Electrovac, Fabrikation Elektrotechnischer Spezialartikel Gesellschaft M.B.H. Method of making MMC components
US6159340A (en) * 1996-02-29 2000-12-12 Basf Aktiengesellschaft Hydrolyzed polymers of N-vinylcarboxamides as paper, paperboard and cardboard dry strength enhancers
US6740373B1 (en) * 1997-02-26 2004-05-25 Fort James Corporation Coated paperboards and paperboard containers having improved tactile and bulk insulation properties
EP0953679A1 (fr) * 1998-04-22 1999-11-03 Hymo Corporation Agent de renforcement pour papier et procédé de renforcement de papier

Also Published As

Publication number Publication date
DE3161211D1 (en) 1983-11-24
DE3012002A1 (de) 1981-10-08
JPS56148995A (en) 1981-11-18
ATE5089T1 (de) 1983-11-15
EP0036993B1 (fr) 1983-10-19

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