WO2004099500A1 - Method for producing coated paper with pearlescent effect - Google Patents

Method for producing coated paper with pearlescent effect Download PDF

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Publication number
WO2004099500A1
WO2004099500A1 PCT/EP2004/004222 EP2004004222W WO2004099500A1 WO 2004099500 A1 WO2004099500 A1 WO 2004099500A1 EP 2004004222 W EP2004004222 W EP 2004004222W WO 2004099500 A1 WO2004099500 A1 WO 2004099500A1
Authority
WO
WIPO (PCT)
Prior art keywords
coating
pearlescent effect
deposition
coated paper
pearlescent
Prior art date
Application number
PCT/EP2004/004222
Other languages
French (fr)
Inventor
Giuseppe Fedrigoni
Original Assignee
Cartiere Fedrigoni E C. S.P.A.
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 Cartiere Fedrigoni E C. S.P.A. filed Critical Cartiere Fedrigoni E C. S.P.A.
Priority to SI200431382T priority Critical patent/SI1620604T1/en
Priority to CA2524042A priority patent/CA2524042C/en
Priority to PL04728543T priority patent/PL1620604T3/en
Priority to DE602004025226T priority patent/DE602004025226D1/en
Priority to US10/554,418 priority patent/US20060283566A1/en
Priority to AT04728543T priority patent/ATE455904T1/en
Priority to EP04728543A priority patent/EP1620604B1/en
Priority to DK04728543.2T priority patent/DK1620604T3/en
Publication of WO2004099500A1 publication Critical patent/WO2004099500A1/en
Priority to HK06107976.7A priority patent/HK1091522A1/en

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
    • D21H19/00—Coated paper; Coating material
    • D21H19/66—Coatings characterised by a special visual effect, e.g. patterned, textured
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/80—Paper comprising more than one coating
    • D21H19/82—Paper comprising more than one coating superposed
    • 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
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
    • D21H23/56—Rolls
    • 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
    • D21H27/18—Paper- or board-based structures for surface covering
    • D21H27/22—Structures being applied on the surface by special manufacturing processes, e.g. in presses
    • D21H27/26—Structures being applied on the surface by special manufacturing processes, e.g. in presses characterised by the overlay sheet or the top layers of the structures

Definitions

  • the present invention relates to a method for producing coated paper with pearlescent effect.
  • so-called ivory or embossed coated papers are rather widespread and are produced by combining the traditional processes for producing coated papers with the methods for obtaining the so-called ivory or embossed effect.
  • the pearlescent effect can in fact be obtained either by depositing, by means of a stiff blade, the pearlescent pigments on the paper medium on which the coating has been spread beforehand, or by mixing the pearlescent pigments with the coating and then spreading the resulting mixture onto the paper medium.
  • the products obtained with the methods described above are very poor.
  • the dimensions of the pearlescent pigments are in fact distinctly larger (by approximately ten times) than those of conventional coatings, and it is therefore practically impossible to obtain a uniform mixture. Furthermore, in order to allow pearlescent pigments to express their characteristic effect, they must remain completely on the surface, whereas if they are mixed with the coating they also distribute proximate to the paper medium.
  • the aim of the present invention is to provide a method for producing coated paper with pearlescent effect that is capable of eliminating or in any case drastically reducing the drawbacks noted above of conventional methods.
  • an object of the invention is to provide a method for producing coated paper with pearlescent effect that allows to obtain a paper with high printability .
  • Another object of the present invention is to provide a technological solution that allows to provide a range of coated papers with pearlescent (or slightly pearlescent) effect while maintaining a high brightness, so as to allow their use in the most disparate sectors, from graphics to packaging and covering to advertising.
  • Another object of the invention is to provide a method for producing coated paper with pearlescent effect that allows to obtain coated papers with pearlescent effect on one or both sides of the paper medium.
  • the coating with pearlescent effect comprises at least nitrocellulose resins, mica-based pigments, and a solvent.
  • the present invention provides a coated paper with pearlescent effect, which is characterized in that it comprises a paper medium that has, at at least one side, at least one first layer of coating and, over the first layer of coating, at least one layer of coating having a pearlescent effect.
  • Figure 1 is a perspective view of a coated paper with pearlescent effect according to the invention
  • Figure 2 is a perspective view of a deposition cylinder
  • Figure 3 is an enlarged-scale side elevation view of the outer surface of the deposition cylinder shown in Figure 2; and Figure 4 is a sectional view, taken along the line IV-IV of Figure 3.
  • the present invention relates to a method for producing coated paper having a pearlescent effect, generally designated by the reference numeral 1.
  • the production process according to the invention provides that at least one deposition of at least one layer 3 a of coating is performed at at least one side 2a of a paper medium 2, first of all, by way of per se known devices or systems.
  • the method for producing coated paper with pearlescent effect provides for an additional deposition of a pearlescent coating 3 b over the coating layer 3 a.
  • the additional deposition of pearlescent coating 3b is performed by using rotogravure (or flexographic) devices (or systems), constituted for example by a deposition roller 4, which has a plurality of deposition cells 5 at its outer side wall 4a.
  • a method for producing coated paper having a pearlescent effect can provide for a first deposition of a layer of conventional coating approximately 6-12 microns thick on both sides (2a and 2b) of a paper medium 2 that has a thickness of approximately 100 microns.
  • an additional layer of coating of approximately 1-8 microns per side is deposited on both sides. It is evident that after these depositions (of "conventional” coating), the thickness of the medium will be approximately 116-140 microns.
  • a layer of pearlescent coating is then applied on one or both sides of the resulting medium by way of a system or device of the rotogravure/flexographic type, constituted for example by a deposition roller 4.
  • this deposition or these depositions of layers of pearlescent coating is(are) performed by placing the medium, or rather both faces of the medium, in contact with the outer side wall 4a of the deposition roller 4.
  • the coating layer(s) containing the pearlescent pigments deposited by the deposition roller 4 has(have) a thickness of approximately 2-6 microns, which accordingly brings the total thickness of the resulting paper to 120-152 microns.
  • the pearlescent coating comprises at least nitrocellulose resins, mica-based pigments, and a suitable solvent.
  • the present invention provides a coated paper with pearlescent effect 1, which is constituted by a paper medium 2 that has, at at least one side 2a, at least one coating layer 3 a and, above the coating layer 3a, at least one coating layer 3b with pearlescent effect.
  • the materials and the dimensions may be various according to requirements.

Landscapes

  • Paper (AREA)
  • Laminated Bodies (AREA)

Abstract

A method for producing coated paper with pearlescent effect, sequentially comprising the following operating steps: -- a deposition, on at least one side (2a) of a paper medium (2), of at least one layer (3a) of coating; -- an additional deposition, over the at least one layer (3a) of coating, of a coating (3b) with pearlescent effect by a rotogravure/flexographic device.

Description

METHOD FOR PRODUCING COATED PAPER WITH PEARLESCENT
EFFECT
Technical Field
The present invention relates to a method for producing coated paper with pearlescent effect. Background Art
Currently, coated papers are increasingly important in the graphic sector.
In particular, so-called ivory or embossed coated papers are rather widespread and are produced by combining the traditional processes for producing coated papers with the methods for obtaining the so-called ivory or embossed effect.
However, currently it is not easy to obtain a coated paper with pearlescent effect by using conventional processes. The pearlescent effect, according to current knowledge, can in fact be obtained either by depositing, by means of a stiff blade, the pearlescent pigments on the paper medium on which the coating has been spread beforehand, or by mixing the pearlescent pigments with the coating and then spreading the resulting mixture onto the paper medium. However, it has been found that the products obtained with the methods described above are very poor.
The dimensions of the pearlescent pigments are in fact distinctly larger (by approximately ten times) than those of conventional coatings, and it is therefore practically impossible to obtain a uniform mixture. Furthermore, in order to allow pearlescent pigments to express their characteristic effect, they must remain completely on the surface, whereas if they are mixed with the coating they also distribute proximate to the paper medium.
Finally, it should be noted that if the pearlescent pigments are deposited by means of a stiff blade, since they are, as mentioned, considerably larger than the pigments that constitute the coating, they form streaks and/or lines. Disclosure of the Invention
The aim of the present invention is to provide a method for producing coated paper with pearlescent effect that is capable of eliminating or in any case drastically reducing the drawbacks noted above of conventional methods.
Within this aim, an object of the invention is to provide a method for producing coated paper with pearlescent effect that allows to obtain a paper with high printability .
Another object of the present invention is to provide a technological solution that allows to provide a range of coated papers with pearlescent (or slightly pearlescent) effect while maintaining a high brightness, so as to allow their use in the most disparate sectors, from graphics to packaging and covering to advertising.
Another object of the invention is to provide a method for producing coated paper with pearlescent effect that allows to obtain coated papers with pearlescent effect on one or both sides of the paper medium.
This aim and these and other objects that will become better apparent hereinafter are achieved by a method for producing coated paper with pearlescent effect, characterized in that it sequentially comprises the steps of:
~ performing a first deposition, on at least one side of a paper medium, of at least one first layer of coating; ~ performing a second deposition, over the first layer of coating, of a coating with pearlescent effect by means of a rotogravure/flexographic device. Advantageously the coating with pearlescent effect comprises at least nitrocellulose resins, mica-based pigments, and a solvent. According to another aspect, the present invention provides a coated paper with pearlescent effect, which is characterized in that it comprises a paper medium that has, at at least one side, at least one first layer of coating and, over the first layer of coating, at least one layer of coating having a pearlescent effect. Brief Description of the Drawings
Further aspects and advantages of the invention will become better apparent from the present detailed description of some currently preferred examples of embodiments, given merely by way of non-limiting example with reference to the accompanying drawings, wherein: Figure 1 is a perspective view of a coated paper with pearlescent effect according to the invention;
Figure 2 is a perspective view of a deposition cylinder;
Figure 3 is an enlarged-scale side elevation view of the outer surface of the deposition cylinder shown in Figure 2; and Figure 4 is a sectional view, taken along the line IV-IV of Figure 3.
Ways of carrying out the Invention
In the examples of embodiments that follow, individual characteristics, given in relation to specific examples, may actually be interchanged with other different characteristics that exist in other examples of embodiments.
Moreover, it is noted that anything found to be already known during the patenting process is understood not to be claimed and to be the subject of a disclaimer.
As shown by the figures, the present invention relates to a method for producing coated paper having a pearlescent effect, generally designated by the reference numeral 1.
In particular, the production process according to the invention provides that at least one deposition of at least one layer 3 a of coating is performed at at least one side 2a of a paper medium 2, first of all, by way of per se known devices or systems. Also according to the invention, the method for producing coated paper with pearlescent effect provides for an additional deposition of a pearlescent coating 3 b over the coating layer 3 a.
In particular, the additional deposition of pearlescent coating 3b is performed by using rotogravure (or flexographic) devices (or systems), constituted for example by a deposition roller 4, which has a plurality of deposition cells 5 at its outer side wall 4a.
In greater detail, a method for producing coated paper having a pearlescent effect, merely by way of example, can provide for a first deposition of a layer of conventional coating approximately 6-12 microns thick on both sides (2a and 2b) of a paper medium 2 that has a thickness of approximately 100 microns.
Then, according to a preferred embodiment, an additional layer of coating of approximately 1-8 microns per side is deposited on both sides. It is evident that after these depositions (of "conventional" coating), the thickness of the medium will be approximately 116-140 microns.
According to the invention, a layer of pearlescent coating is then applied on one or both sides of the resulting medium by way of a system or device of the rotogravure/flexographic type, constituted for example by a deposition roller 4.
By way of example, this deposition or these depositions of layers of pearlescent coating is(are) performed by placing the medium, or rather both faces of the medium, in contact with the outer side wall 4a of the deposition roller 4. According to a preferred embodiment, the coating layer(s) containing the pearlescent pigments deposited by the deposition roller 4 has(have) a thickness of approximately 2-6 microns, which accordingly brings the total thickness of the resulting paper to 120-152 microns.
Naturally, nothing forbids the use of initial paper media of different thickness, or the deposition of thicknesses of coating (or pearlescent coating) having thicknesses that differ from those indicated in the method described above.
Advantageously, the pearlescent coating comprises at least nitrocellulose resins, mica-based pigments, and a suitable solvent. According to another aspect, the present invention provides a coated paper with pearlescent effect 1, which is constituted by a paper medium 2 that has, at at least one side 2a, at least one coating layer 3 a and, above the coating layer 3a, at least one coating layer 3b with pearlescent effect.
All the characteristics of the invention described above as being advantageous, convenient or the like may also be omitted or replaced with equivalents.
All the details may further be replaced with other technically equivalent elements.
The materials and the dimensions may be various according to requirements.
The disclosures in Italian Patent Application No. VR2003A000054 from which this application claims priority are incorporated herein by reference.

Claims

1. A method for producing coated paper with pearlescent effect, characterized in that it sequentially comprises the steps of:
~ performing a first deposition, on at least one side of a paper medium, of at least one layer of coating;
-- performing a second deposition, over said at least one layer of coating, of a coating with pearlescent effect by means of a rotogravure/flexographic device.
2. The method for producing coated paper with pearlescent effect according to claim 1, characterized in that said coating with pearlescent effect comprises at least nitrocellulose resins, mica-based pigments, and a solvent.
3. The method for producing coated paper with pearlescent effect, according to claim 1, characterized in that said rotogravure/flexographic device comprises at least one deposition roller.
4. The method for producing coated paper with pearlescent effect according to claim 3, characterized in that said at least one deposition roller has a plurality of deposition cells at its outer side wall.
5. The method according to claim 1, characterized in that said paper medium has a thickness comprised between 70 and 400 microns.
6. The method for producing coated paper with pearlescent effect according to claim 1, characterized in that said first deposition step comprises deposition of a first and second layers of coating, said first layer of coating having a thickness comprised between 6 and 12 microns, and said second layer of coating having a thickness comprised between 1 and 8 microns.
7. The method for producing coated paper with pearlescent effect according to claim 6, characterized in that said deposition of said first and second layers of coating is performed at both sides of said paper medium.
8. The method for producing coated paper with pearlescent effect according to claim 1, characterized in that said additional deposition of a coating with pearlescent effect is performed over both of said first depositions.
9. The method for producing coated paper with pearlescent effect according to claim 1, characterized in that said additional deposition of a coating with pearlescent effect has a thickness comprised between 2 and 6 microns per side.
10. A coated paper with pearlescent effect, characterized in that it comprises a paper medium that has, at at least one side, at least one layer of coating and, above said at least one layer of coating, at least one layer of coating with pearlescent effect.
PCT/EP2004/004222 2003-05-07 2004-04-21 Method for producing coated paper with pearlescent effect WO2004099500A1 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
SI200431382T SI1620604T1 (en) 2003-05-07 2004-04-21 Method for producing coated paper with pearlescent effect
CA2524042A CA2524042C (en) 2003-05-07 2004-04-21 Method for producing coated paper with pearlescent effect
PL04728543T PL1620604T3 (en) 2003-05-07 2004-04-21 Method for producing coated paper with pearlescent effect
DE602004025226T DE602004025226D1 (en) 2003-05-07 2004-04-21 METHOD FOR PRODUCING COATED PAPER WITH PEARL EFFECT
US10/554,418 US20060283566A1 (en) 2003-05-07 2004-04-21 Method for producing coated paper with pearlescent effect
AT04728543T ATE455904T1 (en) 2003-05-07 2004-04-21 METHOD FOR PRODUCING COATED PAPER WITH PEARLESS EFFECT
EP04728543A EP1620604B1 (en) 2003-05-07 2004-04-21 Method for producing coated paper with pearlescent effect
DK04728543.2T DK1620604T3 (en) 2003-05-07 2004-04-21 Method of making a coated paper with mother of pearl gloss and coated paper with mother of pearl gloss
HK06107976.7A HK1091522A1 (en) 2003-05-07 2006-07-17 Method for producing coated paper with pearlescent effect

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000054A ITVR20030054A1 (en) 2003-05-07 2003-05-07 PROCESS FOR THE PRODUCTION OF COATED PAPER WITH A PEARLESCENT EFFECT
ITVR2003A000054 2003-05-07

Publications (1)

Publication Number Publication Date
WO2004099500A1 true WO2004099500A1 (en) 2004-11-18

Family

ID=33428333

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2004/004222 WO2004099500A1 (en) 2003-05-07 2004-04-21 Method for producing coated paper with pearlescent effect

Country Status (14)

Country Link
US (1) US20060283566A1 (en)
EP (1) EP1620604B1 (en)
AT (1) ATE455904T1 (en)
CA (1) CA2524042C (en)
CY (1) CY1109957T1 (en)
DE (1) DE602004025226D1 (en)
DK (1) DK1620604T3 (en)
ES (1) ES2338116T3 (en)
HK (1) HK1091522A1 (en)
IT (1) ITVR20030054A1 (en)
PL (1) PL1620604T3 (en)
PT (1) PT1620604E (en)
SI (1) SI1620604T1 (en)
WO (1) WO2004099500A1 (en)

Cited By (2)

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ITMI20130979A1 (en) * 2013-06-13 2014-12-14 Gruppo Cordenons Spa PAPER MATERIAL WITH HOLOGRAPHIC AND METAL PERLESCENT EFFECT AND RELATIVE PROCESS OF MANUFACTURE
ITUB20160512A1 (en) * 2016-02-01 2017-08-01 Gruppo Cordenons Spa PAPER MATERIAL WITH A HIGH SOLID METAL PERLESCENT EFFECT IN LIGHT AND ITS MANUFACTURING PROCEDURE

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
ITMI20130979A1 (en) * 2013-06-13 2014-12-14 Gruppo Cordenons Spa PAPER MATERIAL WITH HOLOGRAPHIC AND METAL PERLESCENT EFFECT AND RELATIVE PROCESS OF MANUFACTURE
WO2014198780A1 (en) * 2013-06-13 2014-12-18 Gruppo Cordenons S.P.A. Paper material having holographic and pearlescent metallic effects and the manufacturing process thereof
ITUB20160512A1 (en) * 2016-02-01 2017-08-01 Gruppo Cordenons Spa PAPER MATERIAL WITH A HIGH SOLID METAL PERLESCENT EFFECT IN LIGHT AND ITS MANUFACTURING PROCEDURE
WO2017134071A1 (en) * 2016-02-01 2017-08-10 Gruppo Cordenons S.P.A. Pearlescent metallic effect paper material with high lightfastness and related manufacturing method

Also Published As

Publication number Publication date
SI1620604T1 (en) 2010-05-31
CA2524042C (en) 2012-11-27
DE602004025226D1 (en) 2010-03-11
CY1109957T1 (en) 2014-09-10
PL1620604T3 (en) 2010-06-30
CA2524042A1 (en) 2004-11-18
EP1620604A1 (en) 2006-02-01
PT1620604E (en) 2010-04-09
ATE455904T1 (en) 2010-02-15
HK1091522A1 (en) 2007-01-19
DK1620604T3 (en) 2010-03-15
ES2338116T3 (en) 2010-05-04
US20060283566A1 (en) 2006-12-21
EP1620604B1 (en) 2010-01-20
ITVR20030054A1 (en) 2004-11-08

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