EP2759488A2 - Maschine zur Imprägnierung eines Rohlings zur Herstellung eines Behälters für Lebensmitteltransport und Imprägnierverfahren dafür - Google Patents

Maschine zur Imprägnierung eines Rohlings zur Herstellung eines Behälters für Lebensmitteltransport und Imprägnierverfahren dafür Download PDF

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Publication number
EP2759488A2
EP2759488A2 EP14151895.1A EP14151895A EP2759488A2 EP 2759488 A2 EP2759488 A2 EP 2759488A2 EP 14151895 A EP14151895 A EP 14151895A EP 2759488 A2 EP2759488 A2 EP 2759488A2
Authority
EP
European Patent Office
Prior art keywords
blank
sheet
spreading
hot glue
plane
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Withdrawn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
EP14151895.1A
Other languages
English (en)
French (fr)
Other versions
EP2759488A3 (de
Inventor
Fabrizio Margnini
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.)
International Paper Italia SRL
Original Assignee
International Paper Italia 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
Application filed by International Paper Italia SRL filed Critical International Paper Italia SRL
Publication of EP2759488A2 publication Critical patent/EP2759488A2/de
Publication of EP2759488A3 publication Critical patent/EP2759488A3/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/40—Applications of laminates for particular packaging purposes
    • B65D65/403—Applications of laminates for particular packaging purposes with at least one corrugated layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20—Corrugating; Corrugating combined with laminating to other layers
    • B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
    • B31F1/26—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
    • B31F1/28—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
    • B31F1/2886—Additionally reinforcing, e.g. by applying resin or wire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/42—Applications of coated or impregnated materials
    • 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

  • the present invention refers to a machine for the waterproof treatment of a blank for making a container for foodstuffs transport.
  • a process for the waterproof treatment of a blank for making a container for foodstuffs transport also forms a purpose of the present invention.
  • the blank subject of the present invention is intended to be used for producing boxes, commonly known at present, for fruits, poultry products, dairy products and generally moist and wet foodstuffs.
  • Such boxes are generally made of blanks made of paper material which are folded to make containers open at the top part, which containers, once filled, are stacked on each other before being transported to the sale points.
  • these blanks have to be simultaneously rigid so as to bear the weight of the foodstuffs contained therein and lightweight so as to facilitate the transport thereof.
  • the blanks currently used for making the aforementioned containers generally comprise at least one plane inner sheet made of paper material intended to come into contact with foodstuffs, at least one plane outer sheet made of paper material opposite to the inner sheet and at least one corrugated sheet made of paper material interposed between the inner and the outer sheet and fixed to the them by means of gluing.
  • the corrugated sheet confers rigidity and sturdiness to the blank while simultaneously remaining foldable and lightweight.
  • the containers are required to not absorb water so as to maintain their mechanical resistance, rigidity and weight characteristics.
  • the paraffin is spread on the corrugated sheet or on the inner sheet.
  • the main purpose of the present invention is to overcome the previously mentioned drawbacks.
  • a purpose of the present invention is to provide a simple and inexpensive machine and process for the waterproofing of blanks.
  • Another purpose of the present invention is to provide a machine and a process for the quick waterproofing of blanks.
  • Another purpose of the present invention is to provide a blank for making a container for foodstuffs transport capable of guaranteeing high waterproof characteristic.
  • Another purpose of the present invention is to provide a blank for making a container for foodstuffs transport capable of allowing an easier and more stable stacking with respect to the known containers.
  • Such blank 10 comprises, as observable in figure 1a , at least one plane inner sheet 11, at least one plane outer sheet 12 opposite to the inner sheet 11 and at least one corrugated sheet 13, 16 interposed between the inner sheet 11 and the outer sheet 12.
  • the blank 10 comprises two corrugated sheets 13 and 16 separated from each other by a plane intermediate sheet 17.
  • the first corrugated sheet 13 is interposed between the inner sheet 11 and the plane intermediate sheet 17 while the second corrugated sheet 16 is interposed between the plane intermediate sheet 17 and the outer sheet 12.
  • the aforementioned sheets 11, 12, 13, 16, 17 which form the blank are preferably made of paper material and they are glued to each other.
  • the at least one plane inner sheet 11 is adapted to come into contact with foodstuffs, while the at least one plane outer sheet 12 is suitable for being ink-printed with decorative patterns.
  • At least one plane inner sheet 11 comprises a first coating waterproof layer 14 made with a hot glue.
  • Such hot glue is a mixture preferably made up of polar and non-polar polymers, resins and waxes.
  • Such coating waterproof layer 14 may advantageously come into contact with foods given that it is not toxic; at the same time, it guarantees a high waterproof degree ensuring that the container made through the blank 10 remains rigid and compact over the entire duration of its use.
  • the previously described blank 10 made of paper material has a COBB index, i.e. the water absorption index equivalent to about 15 g/m 2 ; such COBB index is measured using measurement methods according to the per se known TAPPI 441 standard.
  • the untreated blanks have a COBB index equivalent to 150 g/m 2 ; the blanks known at the state of the art, in which the corrugated sheet is treated using paraffin, are characterised by a COBB index equivalent to about 110 g/m 2 .
  • the at least one plane outer sheet 12 comprises a second coating waterproof layer 15 made with the aforementioned hot glue.
  • the friction coefficient of the surface of the outer sheet 12 is also increased. This allows a safe grip on the containers which can thus be easily gripped and stably stacked before being transported to the different sellers.
  • the second coating layer 15 does not affect the tightness of the ink printing of any decorated patterns.
  • the at least one corrugated sheet 13, 16 comprises a third coating layer (not illustrated) made using paraffin.
  • one or more of such sheets may comprise such third coating layer.
  • Such further coating layer allows to increase the waterproofness of the blank and thus to reduce the COBB index.
  • the blank 10 according to the present invention may be made by means of a machine for the waterproof treatment 20 which will be described hereinafter.
  • a blank, not treated on the surface, is introduced in such machine 20 so that the machine 20 makes the first 14 and possibly the second 15 coating layer on the blank 10.
  • the third coating layer is made on the corrugated sheet 13 before the latter is glued to the inner 11 and the outer 12 sheets to make the body of the blank 10.
  • the third coating layer of paraffin is made on at least one of the corrugated sheets 13 and 16 and/or on the plane intermediate sheet 17 before the latter are glued to the remaining sheets making the blank 10.
  • the machine 20 comprises means 21 for supporting and transporting the blank to be treated, for example one or more conveyor belts or rollers.
  • the machine 20 comprises at least two motor-driven spreading rollers 22 suitable for spreading the hot glue on the at least one plane inner sheet 11 so as to make at least the first coating layer 14.
  • the two motor-driven spreading rollers 22 may also be arranged to also make the second coating layer 15.
  • the two spreading rollers 22 are opposite to each other to border an intermediate gap suitable for being engaged by at least one blank 10 during the spreading of the hot glue.
  • the spreading rollers 22 simultaneously spread the hot glue on the plane inner sheet 11 and on the plane outer sheet 12 making the respective coating layers 14, 15.
  • the center to center distance between the two spreading rollers 22 may be advantageously varied so as to allow the treatment of blanks of different thickness.
  • the spreading of the hot glue occurs by means of direct contact with the blank which is allowed to pass through the two spreading rollers 22.
  • the machine 20 further comprises at least two motor-driven doser rollers 23 suitable for dosing the hot glue on the at least two spreading rollers 22, at least one device (not illustrated) for delivering the aforementioned hot glue on such at least two doser rollers 23 and a central processing and control unit (not illustrated) configured for activating the machine 20.
  • the doser rollers 23 are arranged with respect to the corresponding spreading rollers at a distance such to allow the passage of the glue from one roller to the other.
  • such distance can vary according to the amount of glue intended to be spread on the blank 10.
  • the variation is advantageously performed by means of spindles driven by the central processing and control unit.
  • the machine 20 comprises means (not illustrated) for adjusting the distance between the at least two doser rollers 23 and the at least two spreading rollers 22, and the central processing and control unit is also configured for driving such adjustment means so that the amount of the glue spread on the blank 10 is substantially equal to a predetermined value.
  • the glue is applied on the spreading roller which comes into contact with the inner sheet 11.
  • the device for delivering the glue preferably comprises a device for melting the hot glue provided with a nozzle through which the hot glue is made to drip on the doser rollers 23.
  • the dosing of the hot glue is driven by the central processing and control unit which controls the delivery device so that the delivered amount of hot glue is substantially constant and equivalent to a predetermined value.
  • the at least two spreading rollers 22 are made of rubber material.
  • the use of rubber material preferably resistant to temperatures, allows to reduce the vertical stress on the blank 10 which passes through the spreading rollers 22, so as to mantain the mechanical characteristics thereof, and simultaneously allow to obtain the most homogeneous spreading on a non-perfectly planar surface, like the one typical of corrugated cardboard.
  • the at least two doser rollers 23 are made of steel and they are cylindrical-shaped.
  • such doser rollers 23 are provided with an oil heating system (not illustrated) arranged to heat the surface thereof.
  • an oil heating system may be obtained by means of a plurality of channels made in the body of the doser rollers 23, in which the hot oil flows.
  • the central processing and control unit is also configured for controlling the oil temperature.
  • the heating system is provided with one or more temperature sensors (not illustrated) suitable for detecting the heating oil temperature.
  • the processing and control unit provide a feedback control of the oil temperature according to the detections of such sensors.
  • a process for waterproofing at least one blank 10 also forms a purpose of the present invention.
  • the process firstly comprises, a step of arranging at least one blank 10 to be made waterproof, preferably a plurality of blanks 10 to be supplied consecutively to the previously described machine, then, a step of spreading, by means of the aforementioned spreading rollers 22, a hot glue on at least the plane inner sheet 11, preferably also on the plane outer sheet 12, so as to make the respective coating layers 14, 15.
  • the spreading of the hot glue is performed simultaneously, by the spreading rollers 22, on the plane inner sheet 11 and on the outer sheet 12 of the respective blank 10.
  • the spreading of the hot glue on each blank 10 being supplied is performed by advancing each blank 10 between the spreading rollers 22, each of which engages the respective sheet 11, 12 so as to deposit and spread the hot glue thereon.
  • the use of a hot glue for making coating layers of the surfaces of the inner and outer sheet allows to obtain a high waterproof degree thus simultaneously allowing an easy gluing between the various flaps of the blank, so as to make the container for foodstuffs transport.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Cartons (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
EP14151895.1A 2013-01-23 2014-01-21 Maschine zur Imprägnierung eines Rohlings zur Herstellung eines Behälters für Lebensmitteltransport und Imprägnierverfahren dafür Withdrawn EP2759488A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000094A ITMI20130094A1 (it) 2013-01-23 2013-01-23 Macchina per il trattamento impermeabilizzante di un fustellato e fustellato per la realizzazione di un contenitore per il trasporto di prodotti alimentari

Publications (2)

Publication Number Publication Date
EP2759488A2 true EP2759488A2 (de) 2014-07-30
EP2759488A3 EP2759488A3 (de) 2015-01-14

Family

ID=47790297

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14151895.1A Withdrawn EP2759488A3 (de) 2013-01-23 2014-01-21 Maschine zur Imprägnierung eines Rohlings zur Herstellung eines Behälters für Lebensmitteltransport und Imprägnierverfahren dafür

Country Status (2)

Country Link
EP (1) EP2759488A3 (de)
IT (1) ITMI20130094A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107443809A (zh) * 2017-08-15 2017-12-08 芜湖市新大桥包装有限公司 一种多层瓦楞纸板制备工艺

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1656647A (en) * 1924-09-29 1928-01-17 Regenstein Joseph Foundation board
BE746945A (fr) * 1969-03-07 1970-09-07 Exxon Research Engineering Co Procede de traitement de carton ondule
US3892613A (en) * 1971-07-22 1975-07-01 Int Paper Co Method of making corrugated paperboard
BE822663A (fr) * 1974-11-27 1975-03-14 Matiere de carton ondule pour des recipients d'emballage transportables
FR2558107B3 (fr) * 1984-01-12 1987-03-20 Dechaume Geoffroy Materiau sandwich a ondulations interieures de papier et protection exterieure par pellicule plastique et procedes de realisation d'un tel materiau
US5626945A (en) * 1993-09-28 1997-05-06 International Paper Company Repulpable, water repellant paperboard
US20030124316A1 (en) * 2001-09-20 2003-07-03 Huang Yan C. Repulpable, water repellant paperboard

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107443809A (zh) * 2017-08-15 2017-12-08 芜湖市新大桥包装有限公司 一种多层瓦楞纸板制备工艺

Also Published As

Publication number Publication date
ITMI20130094A1 (it) 2014-07-24
EP2759488A3 (de) 2015-01-14

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