EP1512790A1 - Procédé pour revetir du papier, du carton ou des materiaux similaires - Google Patents

Procédé pour revetir du papier, du carton ou des materiaux similaires Download PDF

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Publication number
EP1512790A1
EP1512790A1 EP04020934A EP04020934A EP1512790A1 EP 1512790 A1 EP1512790 A1 EP 1512790A1 EP 04020934 A EP04020934 A EP 04020934A EP 04020934 A EP04020934 A EP 04020934A EP 1512790 A1 EP1512790 A1 EP 1512790A1
Authority
EP
European Patent Office
Prior art keywords
coating solution
coating
whey
water
paper
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.)
Withdrawn
Application number
EP04020934A
Other languages
German (de)
English (en)
Inventor
Robert Paget
Niranjan Mehta
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.)
Fine Foods Handels- und Beteiligungs GmbH
Original Assignee
Fine Foods Handels- und Beteiligungs GmbH
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 Fine Foods Handels- und Beteiligungs GmbH filed Critical Fine Foods Handels- und Beteiligungs GmbH
Publication of EP1512790A1 publication Critical patent/EP1512790A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/22—Proteins
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/16—Sizing or water-repelling agents

Definitions

  • the invention relates to a method for coating paper, cardboard or similar materials to make them water repellent, using a coating solution superficially applied to the material containing whey.
  • Whey is a well-known natural product that is found in the Essentially consists of fat, protein and minerals as well as water. For example is hereby referred to GB 2 326 115 B, EP 0 845 060 B and the US 2001/0050150 A1. Whey is a natural product, which has excellent ecological properties and when used correctly ensures a relatively high efficiency in terms of water absorption.
  • a disadvantage of the known methods is that the coating solution either must be applied hot or the coated Material to be subjected to a heat treatment after coating must to achieve the desired effect. This makes the process expensive and may affect the quality of delicate materials to lead.
  • a superficial Layer applied to the material so that the surface in sometimes changed undesirably. This also has the disadvantage that when mechanical Stress on the surface there is a risk that the effectiveness the coating is lost.
  • Object of the present invention is to avoid these disadvantages and a To provide a method that optimally the above criteria Fulfills.
  • the coating solution before application to a pH between 7 and 14, preferably between 8 and 11 and more preferably adjusted to about 9 and then heated becomes.
  • the inventive Treatment of the coating solution a specific denaturation of Whey takes place. This denaturation causes the coating solution in the Applying much deeper into the pores of the base material, and penetrates so that does not produce a superficial coating, but a deeper going Treatment of the coated materials. Therefore, the coating obtained in this way much more robust than in the prior art method, since also mechanical influences on the surface of the materials are not immediate lead to destruction of the coating.
  • the temperature at which the heating of the coating solution before application is generally between 40 ° C and 180 ° C, preferably between 60 ° C and 120 ° C and more preferably at about 80 ° C.
  • the duration of the heat treatment for example, three hours.
  • the duration of the heat treatment may be reduced to about 1 minute at Lower temperatures may also require five hours in individual cases be.
  • the duration of the heat treatment can be a few seconds be reduced.
  • An essential aspect of the present invention is that the actual denaturing process the whey after adjusting the pH and heating, however, before the coating of the absorbent materials or at least not completely takes place. Only in the course of the coating is the denaturation completed or completed, whereby the water-repellent effect achieved becomes. The fact may also be one reason that the solution is deeper penetrates into the materials to be coated, whereby the above Benefits are achieved.
  • the present invention relates to a coating solution for coating of paper, cardboard or similar materials to make these water repellent which consists essentially of denatured whey.
  • the coating solution according to the invention is characterized in that the Coating solution to a pH between 7 and 11, preferably 9 is set.
  • the adjustment of the pH by addition made of caustic soda.
  • the present invention also relates to coated paper or coated cardboard.
  • FIGS. 1 to 5 are diagrams showing the experimental results.
  • the two cardboard lots were dipped, to about 0.4 g of the coating solution (either 10% ovalbumin solution about 55% purity or whole whey) applied were (about 15 s diving time). After a short drying time (approx - 15 min), the samples were placed in a warming cabinet at 180 ° C for 5 minutes or 15 minutes, allowed to cool and at 23 ° C / 50% r.F. stored. In addition, the M9 solution was boiled for three hours and cardboard with it coated to increase the influence of cooking time on the water-resistant effect to capture.
  • the coating solution either 10% ovalbumin solution about 55% purity or whole whey
  • samples 0-1, 0-2, 0-3 and 1-5 represent samples which have been carried out according to the prior art, while sample No. 6 has been treated by the method of the present invention.
  • Test climate 23 ° C / 50% RH
  • Table 1 high water uptake test page of the starting pad
  • Figure 2 is a plot of Cobb 60 values of the treated samples of lot 2.1.1 from Table 1 (low water uptake test page of the starting pad); and Figure 3 is a plot of Cobb 60 values of treated samples of lot 2.1.2 ( Higher quality paperboard) from Table 1.
  • the diagram of Fig. 4 shows the water absorption of the treated cardboard of the Batch 2.1.1 over 24 h and the diagram of Fig. 5 Water absorption of the treated Cardboard of batch 2.1.2 over 24 h.

Landscapes

  • Paper (AREA)
  • Paints Or Removers (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP04020934A 2003-09-04 2004-09-03 Procédé pour revetir du papier, du carton ou des materiaux similaires Withdrawn EP1512790A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT13922003A AT412733B (de) 2003-09-04 2003-09-04 Verfahren zur beschichtung von papier, karton oder ähnlichen materialien
AT13922003 2003-09-04

Publications (1)

Publication Number Publication Date
EP1512790A1 true EP1512790A1 (fr) 2005-03-09

Family

ID=33314991

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04020934A Withdrawn EP1512790A1 (fr) 2003-09-04 2004-09-03 Procédé pour revetir du papier, du carton ou des materiaux similaires

Country Status (2)

Country Link
EP (1) EP1512790A1 (fr)
AT (1) AT412733B (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB236115A (en) * 1925-01-12 1925-07-02 James William Kemp Improvements relating to feed water heating apparatus
WO1997007282A1 (fr) * 1995-08-16 1997-02-27 Hercules Incorporated Procedes et compositions de collage du papier
EP0914772A2 (fr) * 1997-11-12 1999-05-12 Viskase Corporation Enveloppe, film ou papier cellulosique résistant à l'action de la cellulase, procédé et composition

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB236115A (en) * 1925-01-12 1925-07-02 James William Kemp Improvements relating to feed water heating apparatus
WO1997007282A1 (fr) * 1995-08-16 1997-02-27 Hercules Incorporated Procedes et compositions de collage du papier
EP0914772A2 (fr) * 1997-11-12 1999-05-12 Viskase Corporation Enveloppe, film ou papier cellulosique résistant à l'action de la cellulase, procédé et composition

Also Published As

Publication number Publication date
AT412733B (de) 2005-06-27
ATA13922003A (de) 2004-11-15

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