EP1533417A1 - Verfahren zur Herstellung von metallischem Papier und metallisches Papier hergestellt mit diesem Verfahren - Google Patents

Verfahren zur Herstellung von metallischem Papier und metallisches Papier hergestellt mit diesem Verfahren Download PDF

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Publication number
EP1533417A1
EP1533417A1 EP04105659A EP04105659A EP1533417A1 EP 1533417 A1 EP1533417 A1 EP 1533417A1 EP 04105659 A EP04105659 A EP 04105659A EP 04105659 A EP04105659 A EP 04105659A EP 1533417 A1 EP1533417 A1 EP 1533417A1
Authority
EP
European Patent Office
Prior art keywords
layer
metallic paper
metal
water
hereinbefore
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
EP04105659A
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English (en)
French (fr)
Other versions
EP1533417B1 (de
Inventor
Gilio Munaro
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.)
METALPACK Srl
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METALPACK Srl
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=34430827&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1533417(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by METALPACK Srl filed Critical METALPACK Srl
Publication of EP1533417A1 publication Critical patent/EP1533417A1/de
Application granted granted Critical
Publication of EP1533417B1 publication Critical patent/EP1533417B1/de
Revoked 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/02—Metal coatings
    • D21H19/08—Metal coatings applied as vapour, e.g. in vacuum
    • 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
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/80—Paper comprising more than one coating
    • D21H19/84—Paper comprising more than one coating on both sides of the substrate
    • 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
    • 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
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/08—Rearranging applied substances, e.g. metering, smoothing; Removing excess material
    • D21H25/12—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with an essentially cylindrical body, e.g. roll or rod
    • D21H25/14—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with an essentially cylindrical body, e.g. roll or rod the body being a casting drum, a heated roll or a calender

Definitions

  • the present invention concerns a method to produce metallic paper, and the metallic paper produced using said method.
  • the metallic paper according to the present invention can be used to make sheets, envelopes, wrappers, bags, containers, paper cornets, wrappings, packages or other, preferably but not exclusively suitable to contain and preserve foodstuffs.
  • a method for the production of an aluminum or aluminized paper for envelopes for use for foodstuffs by means of which a coat of metal oxides, kaolin and earth is applied on a cellulose strip, possibly smoothed and polished on one side, in order to form a first layer that closes the pores of the cellulose.
  • a solvent paint is applied, that is, a paint containing chemical solvent, on which the aluminum is then applied.
  • the aluminum is applied directly onto the layer of solvent paint by means of vacuum sublimation and a sufficiently high quantity thereof is deposited to ensure that the layer of solvent paint is fixed and completely covered.
  • Another layer of solvent paint is finally deposited on the layer of aluminum, which protects the metal layer and prevents it from oxidizing in the air.
  • logos and writings are printed, by means of inks and paints, also containing solvent, in order to decorate or personalize the paper.
  • the strip of paper has to be transferred to a working site that is separate from that where the paper is produced, in order to prevent the solvent from dispersing and polluting the paper.
  • Another disadvantage of the known method is that using a coat greatly conditions the basic characteristics of the paper used for metalization.
  • Purpose of the present invention is to perfect a method that does not require the use of toxic products, such as solvents or metal oxides, so that there is no risk of them remaining in the finished product, and so that it is not necessary to transfer the cellulose sheet to an autonomous working site other than where the basic paper is produced, as happens, on the contrary, when toxic products are used.
  • toxic products such as solvents or metal oxides
  • Another purpose of the present invention is to perfect a method that allows to obtain a metallic paper which has a very limited metal content, so that the incidence of the latter is as low as possible, so that the metallic paper itself can be completely burnt and then disposed of together with ordinary paper.
  • Another purpose of the present invention is to perfect a method to produce metallic paper which, apart from having a great resistance to load, is also light, that is, it has a weight in grams little more than that of the cellulose strip, and that it is easily crumpled.
  • Applicant has devised, tested and embodied the present invention to obtain these and other purposes, to overcome the shortcomings of the state of the art and to obtain significant advantages.
  • a method according to the present invention to produce metallic paper comprises in sequence: a first step during which a first layer of an impregnating material is applied on a cellulose-based sheet or strip; a second step during which a second layer of a water paint is deposited on the first layer; and a third step during which a third layer of metal is deposited on the second layer and anchors stably on the water paint.
  • the metal that forms the third layer interacts with the water paint and is stably integrated therewith in the zone of contact, so that it is not necessary that the layer of metal be protected and covered by any other layer of additional protection.
  • the water paint that constitutes the second layer is advantageously an acrylic paint, soluble in water.
  • Water inks and paints which are without solvents or toxic products, can then be printed directly on the layer of metal in order to make logos or writings.
  • the impregnating material too is a water-soluble acrylic paint.
  • Using a water paint also has the advantage that it prevents the dispersion of toxic solvents into the working environment, and does not necessarily require, during the processing, that the metallic paper be transferred to an autonomous site for the application of the paint onto the first layer, although this can always be done for reasons connected to production.
  • the layer of metal applied can have a very limited thickness, in the range of about 150-200 ⁇ (1.5-2.0 nanometers), while still ensuring a complete cover of the water paint below.
  • the metallic paper according to the present invention can therefore be completely burned. Moreover, thanks to the fact that no coat is applied, the paper can have different weights from several tens of g/m 2 to more than one hundred g/m 2 , for example from about 20 to about 150 g/m 2 .
  • the second step to apply the water paint can advantageously be carried out immediately after the first step.
  • a processing step is also advantageously provided at the end of the aforesaid third step, to process at least the third layer of metal with a substance able to make the paper proof against fatty and oily substances.
  • a metallic paper 10 according to the present invention is produced in a processing plant 12 (figs. 2 to 4) which comprises a plurality of stations, substantially of a known type, which are arranged sequentially to each other.
  • a first station 14 of the processing plant 12 (fig. 2) comprises a container 16, containing a wet cellulose mix, a conveyor belt 17 onto which the cellulose mix is poured, and a contrasting roller 19.
  • the strip 21 defines the base layer of the metallic paper 10 (fig. 1).
  • the strip 21 is wound onto a drying and polishing roller 23 of a known type, which makes the strip 21 smoother and shinier on a first side 25, or front side (fig. 1).
  • the polishing is controlled, downstream of the roller 23, by means of control members 27, such as for example optical type detectors.
  • the strip 21 is made to transit in a second station 29, comprising a first calender 31, by means of which a layer of impregnating material 33 is applied (fig. 1) on the first side 25 of the strip 21.
  • the impregnating material 33 advantageously consists of a water-soluble acrylic paint, such as for example product 1334 marketed by the Company SUN CHEMICALS.
  • the impregnating material 33 forms a first layer of the metallic paper 10.
  • the strip 21, already provided with the impregnating material 33 is made to transit first in a circuit of compressed air 37 and then in a drier 39 with infrared rays where, apart from drying, the humidity of the strip 21 is also continuously controlled.
  • the strip 21 is made to transit in a fourth station 43, comprising a second calender 45 by means of which a second layer is applied, consisting of a paint 47 (fig. 1).
  • the paint used is a water paint, such as for example product 1034 marketed by the Company SUN CHEMICALS.
  • the whole processing plant 12 can be installed in the same site, and without particular problems, since the working environment is in no way polluted by organic solvents.
  • the strip 21, already provided with the two layers 33 and 47 is inspected along its travel by other control members 49 in order to verify the humidity, structure and possible imperfections thereof, and is again dried on a drier roller 51.
  • the strip 21 is then transferred to a fifth station 53, optionally comprising a third calender 55, by means of which it is conditioned on its second side 57, or back (fig. 1) by applying water and starch so as to prevent the metallic paper 10 from subsequently curling.
  • a fifth station 53 optionally comprising a third calender 55, by means of which it is conditioned on its second side 57, or back (fig. 1) by applying water and starch so as to prevent the metallic paper 10 from subsequently curling.
  • the strip 21 is further dried in a sixth station 59 and then transferred to a seventh station 61 (fig. 4), where it is pressed with a pressure of about 300-400 kg/cm 2 by means of a pair of calendars 63, at a temperature of about 70-80°C.
  • the strip 21 with the two layers of impregnating material 33 and respectively of water paint 47 is thus flattened and homogenized, so that it is ready for metalization.
  • the strip 21 is wound onto a roller 67.
  • the latter is transferred to an eighth station 69 where metalization is carried out by applying a layer of metal 70 onto the layer of paint 47 (fig. 1).
  • a layer of aluminium, copper or other material is applied.
  • the station 69 is of a substantially known type and comprises a chamber kept under vacuum, inside which a sublimation unit 72 is arranged, provided with one or more rolls 73 of wires of aluminium or of the metal that is to be used.
  • the strip 21 is guided inside the vacuum chamber so that the layer of paint 47 is facing towards the sublimation unit 72.
  • the latter heats the wire of aluminium, or of other metal, to high temperatures, so as to vaporize it directly on the layer of water paint 47. Thanks to the characteristics of the layer of water paint 47, the aluminium or other metal is fixed to the water paint itself, interacting and stably integrating therewith in the zone of contact.
  • the strip of metallic paper 10 is rewound onto a roller 75 and is ready to be printed directly on the metal layer 70 without having to apply any additional protective layer provided with anti-oxidant substances.
  • the metal layer 70 is printed by means of water printing, in a relative printing station not shown in the drawings.

Landscapes

  • Paper (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
EP04105659A 2003-11-11 2004-11-10 Verfahren zur Herstellung von metallischem Papier und metallisches Papier hergestellt mit diesem Verfahren Revoked EP1533417B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITUD20030221 2003-11-11
IT000221A ITUD20030221A1 (it) 2003-11-11 2003-11-11 Procedimento per la produzione di carta metallizzata e carta metallizzata prodotta mediante tale procedimento.

Publications (2)

Publication Number Publication Date
EP1533417A1 true EP1533417A1 (de) 2005-05-25
EP1533417B1 EP1533417B1 (de) 2011-08-24

Family

ID=34430827

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04105659A Revoked EP1533417B1 (de) 2003-11-11 2004-11-10 Verfahren zur Herstellung von metallischem Papier und metallisches Papier hergestellt mit diesem Verfahren

Country Status (4)

Country Link
EP (1) EP1533417B1 (de)
AT (1) ATE521757T1 (de)
ES (1) ES2372279T3 (de)
IT (1) ITUD20030221A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201700033470A1 (it) * 2017-03-27 2018-09-27 Adercarta S P A Confezione alimentare antibatterica

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2053283A (en) * 1979-06-29 1981-02-04 Mitsui Petrochemical Ind Metal-coated paper
US4567098A (en) * 1982-07-09 1986-01-28 Zanders Feinpaiere AG Metallized paper and method of its production
EP0715020A1 (de) * 1994-12-02 1996-06-05 Lefatex Chemie GmbH Beschichtungsmittel für Papieroberflächen
US5562994A (en) * 1994-09-21 1996-10-08 Kimberly-Clark Corporation Un-coated paper-making sludge substrate for metallizing
EP0812701A1 (de) * 1996-06-10 1997-12-17 Dai Nippon Printing Co., Ltd. Thermische Übertragungsschicht für das Erzeugen von Bildern mit metallischem Glanz
WO2000024967A1 (en) 1998-10-27 2000-05-04 Proman Coatings Limited Barrier coatings
US6066375A (en) * 1997-04-10 2000-05-23 Fort James Corporation Coated paperboard and paperboard containers having a microwave interactive layer which emits none or very low amounts of benzene in microwave applications
WO2000077300A1 (en) 1999-06-16 2000-12-21 Vacumet Corp. Metallized paper with grease resistance

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2053283A (en) * 1979-06-29 1981-02-04 Mitsui Petrochemical Ind Metal-coated paper
US4567098A (en) * 1982-07-09 1986-01-28 Zanders Feinpaiere AG Metallized paper and method of its production
US5562994A (en) * 1994-09-21 1996-10-08 Kimberly-Clark Corporation Un-coated paper-making sludge substrate for metallizing
EP0715020A1 (de) * 1994-12-02 1996-06-05 Lefatex Chemie GmbH Beschichtungsmittel für Papieroberflächen
EP0812701A1 (de) * 1996-06-10 1997-12-17 Dai Nippon Printing Co., Ltd. Thermische Übertragungsschicht für das Erzeugen von Bildern mit metallischem Glanz
US6066375A (en) * 1997-04-10 2000-05-23 Fort James Corporation Coated paperboard and paperboard containers having a microwave interactive layer which emits none or very low amounts of benzene in microwave applications
WO2000024967A1 (en) 1998-10-27 2000-05-04 Proman Coatings Limited Barrier coatings
WO2000077300A1 (en) 1999-06-16 2000-12-21 Vacumet Corp. Metallized paper with grease resistance

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
APPLICANT'S LETTER, 1 December 2009 (2009-12-01), pages 2

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201700033470A1 (it) * 2017-03-27 2018-09-27 Adercarta S P A Confezione alimentare antibatterica

Also Published As

Publication number Publication date
ES2372279T3 (es) 2012-01-18
ITUD20030221A1 (it) 2005-05-12
ATE521757T1 (de) 2011-09-15
EP1533417B1 (de) 2011-08-24

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