WO2021019367A1 - Machine et procédé de couplage imperméable - Google Patents

Machine et procédé de couplage imperméable Download PDF

Info

Publication number
WO2021019367A1
WO2021019367A1 PCT/IB2020/056876 IB2020056876W WO2021019367A1 WO 2021019367 A1 WO2021019367 A1 WO 2021019367A1 IB 2020056876 W IB2020056876 W IB 2020056876W WO 2021019367 A1 WO2021019367 A1 WO 2021019367A1
Authority
WO
WIPO (PCT)
Prior art keywords
impermeable
layer
coupling
paper
silica
Prior art date
Application number
PCT/IB2020/056876
Other languages
English (en)
Inventor
Francesco Toschi
Original Assignee
Francesco Toschi
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 Francesco Toschi filed Critical Francesco Toschi
Publication of WO2021019367A1 publication Critical patent/WO2021019367A1/fr

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
    • D21H19/80—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
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/38—Coatings with pigments characterised by the pigments
    • D21H19/40—Coatings with pigments characterised by the pigments siliceous, e.g. clays
    • 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
    • D21H19/82—Paper comprising more than one coating superposed
    • D21H19/828—Paper comprising more than one coating superposed two superposed coatings, the first applied being non-pigmented and the second applied being pigmented
    • 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
    • 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
    • D21H27/10—Packing paper

Definitions

  • This invention relates to a machine for making an impermeable coupling for food use, and the relative production method.
  • the invention is used in particular in the food sector since it is necessary to have coupled materials available, designed for the packaging and transport of fresh food or pre-cooked food, which prevent the escape of liquids such as, for example, oils and/or sauces.
  • These machines usually have a station designed to spread a glue and then the plastic film on the surface of the paper material to be made impermeable.
  • the plastic film requires a particular treatment to be coupled in an optimum manner to the paper.
  • This treatment cannot be performed on certain types of film, such as, for example, those of biological origin.
  • the technical purpose which forms the basis of the invention is to propose a machine for making an impermeable coupling for food use which is constructionally simple.
  • a further aim of the invention is to provide a machine for making an impermeable coupling for food use which contains plastic films and which is, therefore, better than the prior art in terms of recycling operations.
  • the aim of the invention is to provide a machine for making a coupling which allows an impermeable coupling for food use to be made which is recyclable and heat resistant.
  • the invention also relates to a method for making the coupling starting from the above-mentioned machine.
  • FIG. 1 is a schematic side view of a machine for making an impermeable coupling according to a first embodiment of the invention, characterised by the presence of a layer of impermeable materials positioned on a single surface of the paper layer;
  • FIG. 1A shows an enlarged detail of figure 1
  • FIG. 2 is a schematic side view of a machine for making an impermeable coupling according to a second embodiment of the invention, characterised by the presence of the layer of impermeable material on both surfaces of the paper layer;
  • - Figure 2A shows an enlarged detail of figure 2;
  • FIG. 3 is a schematic side view of a machine for making an impermeable coupling according to a third embodiment of the invention.
  • the numeral "M” denotes in its entirety a machine for making an impermeable coupling for food use according to the invention.
  • the machine “M” comprises a plurality of operating stations each having a different function in the making of the impermeable coupling "A” which is formed by at least one layer of paper material "C", which acts as a base, and at least one layer of impermeable material “S” positioned on at least one surface of the layer of paper material "C".
  • a primer film "P” designed to improve the application and/or the efficiency of the impermeable layer.
  • the machine “M” comprises an unwinding station “D” from which the paper material "C” is unwound from a reel 1.
  • the paper material "C" may be supplied to the machine “M” directly from the outfeed of the production line of the paper material "C".
  • the paper material "C" at the outfeed from its production line, enters directly into the machine "M" without the need to be rolled on reels and then unrolled.
  • the paper layer "C” is unrolled from the reel 1 and progressively fed towards the next station “E” along a feed line defined by the path between the unwinding station "D” and a last station "0", described in more detail below.
  • the above-mentioned station “E” comprises a second applicator 2 for applying a primer "P" on the paper layer "C".
  • the primer acts as a means of joining the paper material "C” and the impermeable layer “S” which will be placed subsequently by means of a respective applicator 4.
  • the paper layer "C”, in combination with the primer film “P”, is able to receive in an optimised manner the impermeable layer "S", there is a subsequent station "F” comprising a pre-heating unit 3.
  • the pre-heating device 3 pre-heats the stretch of paper material "C", on which the primer film "P” has been applied, to a temperature of between 40°C and 180°C.
  • the temperature may vary based on different design requirements such as, for example, the type of primer.
  • pre-heating unit 3 can perform a twofold function, that of pre-heating the stretch of paper material "C" and/or that of drying the primer
  • the paper material "C” is suitable for receiving, on at least one of its surfaces (and in particular on the primer film "P"), the layer of impermeable material "S", comprising silica and water.
  • the paper material "C" feeding out of the station “E” passes directly to the station "G" for applying the layer of impermeable material comprising silica, that is to say, skipping the pre-heating step.
  • the layer of impermeable material "S” comprising silica and water advantageously has a viscosity of less than 10,000 cps and is applied as the last outer layer of the impermeable coupling "A" thanks to a first applicator 4, located in the station "G" downstream of the pre-heating unit 3.
  • the layer of impermeable material "S” comprises in its initial form 40% by volume of silanes, 30% by volume of water, 20% by volume of alcohol, 10% by volume of silica (Si02).
  • the initial shape means the structural shape before the operations necessary for the production of the coupling "A".
  • the impermeable material “S” comprises 99.93% of silica (Si02) and 0.07 of Cl.
  • downstream refers to the direction of feed of the coupling "A" starting from the unwinding station "D" towards the last station "0".
  • the first applicator 4 distributes a layer of impermeable material "S” comprising silica in such a way that the material penetrates uniformly into the paper layer "C” below it, making it totally impermeable to liquids.
  • the first applicator 4 comprises a dispensing nozzle (for example, positioned downstream of a tank or a feed device), or counter rotating cylinders wherein at least one cylinder is spread with silica whilst the other performs the transport function.
  • the first applicator 4 may be selected between industrial brushes or spatulas, sprayers, or a silica bath where the paper layer "C" is immersed in such a way as to be made impermeable.
  • paper layer “C” may be made totally impermeable or on one side only.
  • the impermeable coupling "A” is complete; it has a base layer formed from paper material "C”, spread on at least one relative surface with a primer film "P”, and a layer of impermeable material “S” comprising silica.
  • the machine “M” Downstream of the first applicator 4, the machine “M” also comprises a station H comprising a first oven 5 in which the impermeable coupling "A” stops or passes for a predetermined period of time at a first temperature of between 100°C and 160°C to promote a first drying of said silica and said water of the impermeable material (S).
  • the primer and the impermeable material "S” comprising silica dry and penetrate in depth in each particle of the paper layer "C” avoiding not only the formation of bubbles but also avoiding a non-uniform distribution of the impermeable material "S".
  • the first oven 5 allows heating of the impermeable coupling "A" to a temperature of between 100°C and 160°C based on various parameters, for example, the thickness of the layer of impermeable silica to be dried and its type.
  • the machine “M” comprises a second oven located downstream of the first oven 5 and configured to heat the impermeable coupling "A” to a second temperature of between 150°C and 230°C to promote the stabilisation of said silica on the impermeable material "S".
  • This second heating step at a temperature higher than the first allows the crystallisation of the silica on the paper material "C” to be obtained, making the reciprocal coupling optimised and resistant over time.
  • the machine “M” also advantageously comprises, downstream of the first oven 5 and of the second oven, a cooling unit 6 and a cutting device 7 which constitute the station “I” and the station “L”, respectively.
  • the cooling unit 6 is positioned before the cutting device 7, in this way the coupling is first brought to ambient temperature to be stabilised and then cut.
  • the stabilising makes it possible to obtain a coupling which remains uniform over time and, therefore, once subjected to the cutting operation does not modify the relative geometries.
  • the impermeable coupling "A” may be cut into sheets, cut to form blanks or it may be notched and/or cut.
  • the last station "0" of the machine "M" may have different components.
  • the last station “O” comprises a device which rewinds the impermeable coupling "A” around a reel 8.
  • the reel 8 is used, for example, when the impermeable coupling "A” is subjected to cuts or incisions and stored for transport and/or further processing.
  • the cutting device 7 cuts the impermeable coupling "A" into sheets, they are positioned in piles, for example on shelving or racks which therefore replace the reel 8 in the "0" station.
  • the embodiment of the machine “M” as shown in Figure 1 is usually used when obtaining an impermeable coupling "A" having the impermeable characteristic only on one surface.
  • the couplings "A" are used to create sheets/tubs/containers in which the impermeable part is used to prevent the liquids present in the food to be contained from escaping; the impermeable part is therefore, in these cases, in direct contact with the food.
  • the impermeability on both sides is usually used for making couplings designed, for example, for the production of shopping bags wherein there is the need to have both the inner surface and the outer surface perfectly impermeable.
  • the impermeability of both the surfaces of the coupling "A” makes it possible to obtain a two-way barrier, both from and towards the inside and/or the outside.
  • the embodiment illustrated in Figure 2 shows a station “E” for applying the primer "P” comprising a pair of first applicators 2, 2' and a station “G” for distributing the silica comprising a pair of second applicators 4, 4'.
  • Each of the two above-mentioned stations "E” and “G” sees the applicators facing the two opposite sides of the paper layer “C”, in such a way as to simultaneously create on both sides of the paper layer "C", a primer film “P” and a respective impermeable layer “S”.
  • the machine "M” has the remaining stations configured as in the embodiment shown in Figure 1.
  • FIG 3 shows a configuration in which the stations are repeated according to the feed line of the paper layer "C". More specifically, at the end of the first series of stations "D", “E”, “F”, “G”, “FI” the paper layer "C” is impermeable on one side.
  • the second set of stations may follow a curvature of the coupling, for example to overturn the coupling, exposing upwards the surface not yet made impermeable.
  • the first series of stations comprises, as the last station, the station "I" for cooling and the second series also comprises the station "I".
  • the stations "I" and T" and/or “L” and/or the stations “F” and “F'” might not be present.
  • This application may be performed in various ways, for example by means of counter-rotating rollers, spraying, spreading in the case of liquefied or partly liquefied silica or by immersion if the paper layer "C" is to be made permeable even laterally; - heating the impermeable coupling "A” to a first temperature of between 100°C and 160°C inside a first oven 5 to promote a first drying of the silica and of the water of the impermeable material "S",
  • the method also advantageously comprises the step of placing a primer film "P" on the surface of the paper material "C” using a second applicator 2.
  • the method also comprises further steps which refer, respectively, to the pre- heating unit 3, the cooling unit 6 and the cutting device 7, in particular:
  • the cooling step precedes the cutting step.
  • the steps relating to pre-heating, cooling and cutting are not present.
  • the invention achieves the above-mentioned aims, eliminating the drawbacks of the prior art.
  • the machine is constructionally simple and versatile and adaptable in the methods for applying the impermeable silica layer.
  • silica allows a biodegradable and transparent coupling A to be obtained.

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  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Motor Or Generator Frames (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne une machine (M) permettant de fabriquer un couplage imperméable (A), pour des produits alimentaires, comprenant un poste de déroulement (D), un premier applicateur (4) et un four (5). Le poste de déroulement (D) est conçu pour le déroulement progressif d'un matériau en papier (C) à partir d'une bobine (1). Le premier applicateur (4) est conçu pour répartir une couche imperméable (S), en particulier constituée de silice, pour former ledit couplage imperméable (A). Le four (5) est positionné en aval du premier applicateur (4) et est conçu pour chauffer le couplage imperméable (A).
PCT/IB2020/056876 2019-07-26 2020-07-22 Machine et procédé de couplage imperméable WO2021019367A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102019000012999 2019-07-26
IT102019000012999A IT201900012999A1 (it) 2019-07-26 2019-07-26 Macchina e metodo per accoppiato impermeabile

Publications (1)

Publication Number Publication Date
WO2021019367A1 true WO2021019367A1 (fr) 2021-02-04

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ID=68733510

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2020/056876 WO2021019367A1 (fr) 2019-07-26 2020-07-22 Machine et procédé de couplage imperméable

Country Status (2)

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IT (1) IT201900012999A1 (fr)
WO (1) WO2021019367A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011088911A1 (fr) * 2010-01-25 2011-07-28 Voith Patent Gmbh Machine à papier thermosensible ou à papier autocopiant et procédé de fabrication de papier thermosensible ou papier autocopiant
WO2015025083A1 (fr) * 2013-08-19 2015-02-26 Oy Separation Research Ab Composition d'hydrophobisation, procédé d'hydrophobisation et substrat
US20170211237A1 (en) * 2014-07-30 2017-07-27 Munksjö Oyj Heat-sealing barrier paper

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7128659B2 (ja) * 2017-06-15 2022-08-31 ダウ グローバル テクノロジーズ エルエルシー 機能性ポリオレフィンフィルムでコーティングされた紙

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011088911A1 (fr) * 2010-01-25 2011-07-28 Voith Patent Gmbh Machine à papier thermosensible ou à papier autocopiant et procédé de fabrication de papier thermosensible ou papier autocopiant
WO2015025083A1 (fr) * 2013-08-19 2015-02-26 Oy Separation Research Ab Composition d'hydrophobisation, procédé d'hydrophobisation et substrat
US20170211237A1 (en) * 2014-07-30 2017-07-27 Munksjö Oyj Heat-sealing barrier paper

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IT201900012999A1 (it) 2021-01-26

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