EP2240387A1 - Couvercle et procédé de fabrication de celui-ci - Google Patents

Couvercle et procédé de fabrication de celui-ci

Info

Publication number
EP2240387A1
EP2240387A1 EP09707722A EP09707722A EP2240387A1 EP 2240387 A1 EP2240387 A1 EP 2240387A1 EP 09707722 A EP09707722 A EP 09707722A EP 09707722 A EP09707722 A EP 09707722A EP 2240387 A1 EP2240387 A1 EP 2240387A1
Authority
EP
European Patent Office
Prior art keywords
sealing layer
carrier material
lid
printed
sealing
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Withdrawn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
EP09707722A
Other languages
German (de)
English (en)
Inventor
Detlef Wolters
Roland Loebelt
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.)
Amcor Flexibles Kreuzlingen AG
Original Assignee
3A Technology and Management AG
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
Priority claimed from EP08405031A external-priority patent/EP2088092A1/fr
Application filed by 3A Technology and Management AG filed Critical 3A Technology and Management AG
Priority to EP09707722A priority Critical patent/EP2240387A1/fr
Publication of EP2240387A1 publication Critical patent/EP2240387A1/fr
Withdrawn legal-status Critical Current

Links

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
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
    • 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
    • B65D2577/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks, bags
    • B65D2577/10—Container closures formed after filling
    • B65D2577/20—Container closures formed after filling by applying separate lids or covers
    • B65D2577/2016—Reinforcing ribs in the central part of the closure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture

Definitions

  • the invention relates to a lid made of a carrier material, one, based on a container to which the lid is applied, inwardly-facing sealing layer of a printed on the substrate sealing wax for sealing the one shoulder having container, wherein the inwardly facing side of the carrier material the sealing layer has in the form of a print image corresponding to the shoulder of the container and a print pattern of a sealing lacquer or polymer-containing lacquer is printed on the carrier material within the area delimited by the sealing layer.
  • a method for producing the lid is also a method for producing the lid.
  • containers such as deep-drawn, injection-molded or otherwise shaped containers, at their opening with a flat annular shoulder and cover such containers, in particular after filling, with the lid over the entire surface resting on the shoulder and, for example is attached by sealing or gluing the shoulder peelbar and sealing.
  • Such containers, trays, meal trays, for example with one or more compartments, cups, small packs, etc. are known, for example, for packaging foodstuffs of all kinds, such as e.g. Dairy products, in particular yoghurt, whipped cream, sour milk, sour cream, creamer, ready-made preparations of salads or semi- or canned goods, precooked or otherwise prepared dishes, beverages, such as fruit and vegetable juices or drinking water.
  • the lids are punched and stacked, for example, from an endless lid material present.
  • the stack of lids are fed to a packaging machine and the isolated or unstacked lids are continuously sealed onto the already filled containers.
  • the covers provided with a sealing layer are sealed onto the edge of the container by means of a sealing tool in the shoulder region of the container.
  • the separation or destacking of the lid by removal from the lid stack is performed by the packaging machine. NEN not always performed reliably because the adjacent lid can adhere to each other unwanted. For example, by embossing the lid material, the effect of sticking together can be prevented. However, embossing on the lid material has a negative effect on the printed image on the outside of the lid.
  • the lid material can be made of a variety of materials, depending on the requirements. Typical examples are metal foils which are coated on one or both sides with plastic. Other lid materials contain or consist of plastics in the form of monofilms or multilayer laminates. Other lidding materials may be cellulosic materials such as cellophane or paper. Also used are laminates of metal and plastic films.
  • the lid material is provided over the entire surface with a sealing layer, such as a sealing varnish or a sealing film, wherein the sealing layer, for example, at least on the, in the finished package inwardly facing side, i. pointing towards the container interior, is attached.
  • the lid material subsequently serves as an information and advertising medium. For this reason, the lid material is provided on its outside with a pressure.
  • the printing can be arranged on the uppermost layer facing outward on a finished container as a so-called straight printing.
  • the printing can also be covered with a protective lacquer or with a protective film or the topmost layer of the lid material can be made of transparent material and printed on the back (so-called reverse printing).
  • the print images can be one or more colors and applied in a printing press.
  • the lid material is produced, for example, in such a way that a carrier, such as a metal foil, a plastic foil or a plastic foil composite, is processed by laminating or calendering with one or more further layers to form a multi-layer composite. On the on the finished container inside facing side of the lid material is applied by painting or laminating the sealant layer. After these processing steps, the lid material present, for example, as a roll is passed through a printing machine. On the later side of the container to the outside facing side of the lid material can thus be attached to a print. In addition, an embossing step is to be provided which gives the lid material, for example, a worm embossing.
  • a lid material for containers wherein the sealing layer is applied in the form of a printed image on the lid material and the printed image corresponds to the shoulder region of the container.
  • the lidding material is sealed over the sealing layer against the shoulder region of the container.
  • lid materials A disadvantage of older known methods for the production of lid materials is the high cost of materials for the full-surface coverage of the lid material with sealable material, although only a small percentage of this sealable material is ultimately needed for the sealed seam.
  • the lid material In the cases described here, the lid material must be embossed and the embossed lid material, resp. the lid made of it, give the printed image only unfavorably.
  • the invention has for its object to propose a cover of the type mentioned, which an economical use of sealing wax allows reliable, can be isolated from a stack of lids and can be produced to save material without sacrificing quality.
  • the inventive solution of the problem results in that the thickness of the print pattern printed on the carrier material is greater than the thickness of the sealing layer.
  • the height of the printing pattern preferably has 3 to 7 times, in particular 4 to 6 times, the height of the sealing layer.
  • the height of the sealing layer is about 2 to 5 microns and the height of the print pattern at about 15 to 30 microns.
  • the sealing layer may have a number over the circumference of the sealing layer, preferably evenly distributed, substantially punctiform elevations. This ensures that the lid edges can not bend. For example, at least three and in particular at least four elevations may be present.
  • An upper limit on the number of surveys is not very critical, and may be, for example, up to a number of 20 surveys.
  • three to eight and particularly advantageous are four to six surveys.
  • the height of the elevations above the carrier material preferably corresponds substantially to the height of the printed pattern.
  • the carrier material may be a monofilm of plastic or a multilayer composite of two or more plastic layers or a metal foil or a multilayer composite of at least one metal foil or and at least one plastic film.
  • the carrier material can also consist of cellulose-containing material or contain cellulose-containing material.
  • the cellulose-containing material may be coated on one or both sides, for example, with plastic or may be metallized or may on one side a plastic layer and on the other side have a metallized layer.
  • the plastics of the carrier material may be, for example, a polyolefin, such as polyethylene (PE) or polypropylene (PP), polyamide (PA), polyethylene terephthalate (PET) or polyvinyl chloride (PVC).
  • the support material may have a thickness of, for example, 12-500 ⁇ m, wherein the support materials made of plastic films or metal foils or of metal and plastic films preferably have a thickness of 12-150 ⁇ m, while cover materials containing cellulose-containing materials have a thickness of 40-500 ⁇ m, for example exhibit.
  • the carrier materials are in particular so flexible that they can be wound into coils.
  • Preferred support materials comprise a transparent, opaque or opaque film or a film composite, of at least one plastic of the series of polyesters, polyolefins, such as polyethylene or polypropylene, polyamide or of cellglass or of a metal foil or of a plastic-coated metal foil or a laminate of paper with a plastic layer, such as a PET layer, which in turn may be metallised.
  • the carrier material may also have a barrier to gases, vapors and moisture.
  • Barrier layers may be, for example, films of plastics such as polyvinylidene chloride (PVDC) or ethyl vinyl alcohol (EVOH) besides the metal foils mentioned, or it may be a layer of ceramic materials such as the oxides or nitrides of silicon or aluminum. in a thin layer, eg in the range of 10 to 500 nm, have been deposited on a carrier film in a vacuum thin film process.
  • PVDC polyvinylidene chloride
  • EVOH ethyl vinyl alcohol
  • ceramic materials such as the oxides or nitrides of silicon or aluminum.
  • metallic layers e.g. made of aluminum, which are deposited by sputtering on the carrier.
  • the lid On the - at the later finished container - outward-facing side the lid can be arranged on a print.
  • the printing of the substrate can be done with all known printing methods, such as book, offset, flexo, screen, heli and copper gravure.
  • the choice of which printing process to use depends on the desired print quality, the respective technical conditions and the number of copies.
  • the printing on the outside of the support material may, for example, additionally be overcoated by means of a protective lacquer or by means of a Kaschierzsstoffs or an adhesive may also be a transparent film, for example of polyethylene terephthalate, polyamide, polyolefins, such as polyethylene or polypropylene or a glass layer, but then in general Improvement of the protection of the printed image is printed in reverse printing, are laminated to the substrate.
  • a sealing layer and a printed pattern are applied on the side of the lid facing the inside of the container, which is a finished container.
  • the sealing layer and the printing pattern are mounted in the form of printed images on the carrier material.
  • the sealing layer can be applied to the carrier material in a prepositioned or back-fed printing press, ie before or after the production of the output-side printed image.
  • the printing pattern can be applied to the carrier material in the same or a preceding or back-fed printing machine, ie simultaneously with, before or after the production of the sealing layer.
  • the printing pattern is expediently applied using the same printing form which prints on the sealing layer.
  • the printing pattern can advantageously be made of a primer and / or bonding agent and a sealing wax or can only be from a sealing wax.
  • a primer or adhesion promoter and a sealing lacquer Preference is given to the use of a primer or adhesion promoter and a sealing lacquer.
  • the adhesion agent, resp. The primer and the pellet are applied successively in a printing machine, for example by a book, offset, flexo, screen, heli, gravure or copper gravure, preferably by a flexographic or gravure printing, on the carrier material.
  • the print pattern has a high negative proportion, which means that, for example, only 0.1 to 20%, suitably 1 to 10%, of the inwardly facing surface of the lid is covered with the print pattern and the remaining area is free from the print pattern.
  • the printing pattern is preferably constructed from circular ring segments arranged on concentric circles.
  • the print pattern can also be a uniform or non-uniformly distributed dot or line grid.
  • the sealant layer, as well as the print pattern may contain or consist of a sealing wax.
  • suitable polymers for the sealant layer and the print pattern are polyolefins, vinyl polymers, acrylic polymers, their copolymers or mixtures thereof.
  • the sealant layer, as well as the print pattern may also contain the sealant and a primer or primer, for example of a polyester or a vinyl polymer. The primer or primer is advantageously applied to the carrier and the sealing wax on the primer or primer.
  • dispersions or lacquers both solvent-based and solvent-free lacquers, such as polymer-containing lacquers, e.g. based on PVC, PVC / PVAC, PVDC or acrylates, for forming the printing pattern.
  • the solids content in the paints should be as high as possible and the proportion of solvents should be as low as possible.
  • the dispersions and paints must be druckmaschinen published.
  • the sealing layer and the printing pattern are continuously applied in the direction of film travel by means of a printing process to the carrier material present as cover film tape, the height of the printing pattern being 3 to 7 times, preferably 4 to 6 times Has thickness of the sealing layer.
  • the covers are then punched out and stacked.
  • the thickness of the sealing layer is adjusted to about 2 to 5 microns and the thickness of the printing pattern to about 15 to 30 microns.
  • the sealing layer and the print pattern are expediently applied simultaneously to the carrier material in a single operation.
  • the printing patterns succeeding one another in the film running direction can be printed on the carrier material rotated by an angular amount relative to the respective preceding printing pattern.
  • Figure 1 is a plan view of the inside of a lid with an annular pressure pattern.
  • Figure 2 is a section through the intended for sealing against the edge of a container lid of Figure 1 along the line L-l ..;
  • Fig. 3 - 5 the top view of the inside of lids with other printing patterns
  • FIG. 6 shows the plan view of a film with an arrangement of covers according to FIG. 1;
  • Fig. 7 is a plan view of an array of annular printing patterns with rotating in the film running direction printing geometry.
  • a lid 10 shown in FIGS. 1 and 2 has a carrier material 12 with an outer side printing 14 and a covering the printing Protective lacquer layer 16 on.
  • the carrier material 12 On the inner side of the lid, the carrier material 12 has an annular sealing layer 18 applied to the carrier material 12 by means of a printing process and within the area bounded by the sealing layer 18 a printing pattern 20 of spacer elements likewise applied to the carrier material 12 by means of a printing process From the annular sealing layer 18 protrude four regularly distributed over the circumference of the sealing layer 18 arranged substantially punctiform elevations 19 protrude.
  • the punctiform elevations are shown by way of example circular. In the context of the present invention are also surveys with a formally arbitrary, such as polygonal or rounded punctiform limited cross-section.
  • the annular printed image of the sealing layer 18 corresponds to the upper edge forming annular shoulder 36 of a characterized by a bottom 32 and a towering from this side wall 34 container 30.
  • a food or a Beverage such as yoghurt, jam, dried fruit, a chocolate preparation or other dessert or with drinking water or fruit and vegetable juices
  • the container 30 is covered with the lid 10, and the lid 10 is over the shoulder 36 of the container 30 resting ring-shaped sealant layer 18 sealed against the edge termination of the container 30.
  • the lid 10 is provided with a tear tab 11 for peeling the lid 10 sealed onto the container rim and thus opening the container 30.
  • the height a of the printed annular sealing layer 18 is smaller than the height b of the printed pattern 20 or the ring segments 22 serving as spacers.
  • the height of the four point-shaped elevations 19 above the substrate 12 corresponds to FIG Height b of the printed printed pattern 20 or the ring segments 22 serving as spacers.
  • the sealing layer 18 is applied in the region of the shoulder 36 of the container 30 according to or approximately corresponding to the image of the annular shoulder 36 of the container 30. Accordingly, the sealing layer 18 is applied to the carrier material 12 only on the lid 10 or substantially only at the points in contact with the shoulder 36. This is indicated schematically by the dotted lines. In the example shown, the sealing layer 18 has been printed annularly on the carrier material 12.
  • the printed image of the sealing layer 18 can deviate slightly from the shoulder 36 of the container 30.
  • the printed image of the sealing layer 18 for example, 1 to 50% narrower than the width of the shoulder 36 of the container 30.
  • the printing pattern 20 is also formed, for example, by printing a sealing lacquer.
  • a sealing lacquer For corrosion-sensitive lidding materials, e.g. Metal foils, it is advisable to apply a primer over the entire surface on the carrier material 12 as protection against aggressive fillers.
  • FIG. 3 to 5 show covers 10 with various other print patterns 20.
  • the individual spacer elements consist of dots 24.
  • the print pattern 20 is printed on the substrate 12 within the annular seal layer 18. 4 and 5, the printing pattern 20 in the form of a grid of individual lines or strips 26 in parallel or radial arrangement recognizable.
  • the print pattern 20 is printed on the substrate 12 within the annular seal layer 18 also in this case.
  • the strength of the sealed seam can be adjusted by the choice of the sealing tool, the sealing pressure and the sealing temperature.
  • the sealing seam can also be punctured, for example in the form of weaker sealed subregions in the sealed seam or by serrated sealing seam edges.
  • bonding with an adhesive such as a contact adhesive or an adhesive which cures under heat and / or pressure, can also be used, with the proviso that the adhesive can be processed in a printing unit and the adhesive is applied to the adhesive Carrier material 12 can be printed.
  • the material advantage is a material advantage, in particular in that the sealing lacquer is applied only sparsely where it is actually needed.
  • the primer or coupling agent is in amounts of 0.2 to 30 g / m 2 , preferably 1 to 20 g / m 2
  • the sealing wax in amounts of 0.5 to 30 g / m 2 , preferably 1, 5 to 20 g / m 2 applied. Since the primer or bonding agent and the sealing wax must generally be incorporated in a solvent for processing in the printing press, the amount of solvent to be evaporated is reduced considerably. This is expressed both in the energy requirement and in the amount of solvent.
  • the present method is furthermore advantageous because the production of the lid material requires less machine operation.
  • the sealing layer 18 need not be applied separately as a layer or film, but can be applied in the same operation in the same printing machine when attaching the printing pattern 20.
  • the printing pattern 20 spaces the lids 10 in a stack, and mutual adhesion of the lid 10 is effectively suppressed. This unembossed lid in the stack of covers in packaging machines are reliably machine accessible.
  • the sealing layer 18 is present on the lid 10 substantially only in the region of the shoulder 36 of the container 30 to be closed, the risk is minimized that pass from the sealing layer 18 into the container contents and influence, for example, the container contents by odors or flavors. Since the sealing wax is applied only at the points of the seal and not over the entire lid area, results in transparent lid materials virtually perfect transparency, and the properties of a completely transparent substrate remain fully intact. Transparent support materials thus practically do not deteriorate in terms of their transparency through the sealing wax.
  • the printed images for the annular sealing layer 18, viewed in the film running direction x are arranged in an overlapping manner.
  • This overlapping arrangement-in the drawing, the overlapping area is hatched-leads to a saving of lid material, for example of aluminum foil when used as a carrier material, and thus to an economically justifiable design of the costs.
  • the sealing layer 18 now has the same height as the printing pattern 20 within the area bounded by the sealing layer 18, the overlap in the winding of the printed cover film 40 leads to a material structure and thus to a constant "thick spot" in the wound cover film, which for example a plastic deformation of the aluminum and as a result to a deterioration of Maschinenwritten- speed of the lid film leads.
  • the height b of the printing pattern 20 which according to the invention is greater than the height a of the sealing layer 18, the abovementioned material structure in the overlapping area does not occur.
  • successive printing patterns 20 are each rotated by a certain angular amount on a strip-shaped cover material in the film running direction x, so that after punching to covers 10 no identical geometries are superimposed.
  • This is achieved by corresponding rotation of the print motifs in the running direction of the printing cylinder within a printing cylinder circumference.
  • the printing Motive can be carried out thereby material-saving with regard to the required sealing wax.
  • the printing cylinder is manufactured so that the annular sealing layer 18 and the printing pattern 20 can be printed with the same paint but in different thicknesses.
  • the printing original for the sealing layer 18 having a height of e.g. 4 microns engraved on the printing cylinder and for the printing pattern 20 with a height of e.g. Engraved 25 ⁇ m.

Abstract

L'invention concerne un couvercle (10) comportant un matériau support (12) et une couche de scellement (18), dirigée vers l'intérieur par rapport à un récipient (30) sur lequel est utilisé le couvercle (10), cette couche étant en vernis de scellement imprimé sur le matériau support (12) pour fermer le récipient (30) qui présente un épaulement (36). Selon l'invention, le côté du matériau support (12) dirigé vers l'intérieur présente la couche de scellement (18) sous la forme d'une image imprimée correspondant à l'épaulement (36) du récipient (30), et à l'intérieur de la zone délimitée par la couche de scellement (18), un motif (20) en vernis de scellement ou en vernis à base de polymère est imprimé sur le matériau support (12). L'épaisseur (b) du motif (20) imprimé sur le matériau support (12) est supérieure à l'épaisseur (a) de la couche de scellement (18).
EP09707722A 2008-02-05 2009-01-19 Couvercle et procédé de fabrication de celui-ci Withdrawn EP2240387A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09707722A EP2240387A1 (fr) 2008-02-05 2009-01-19 Couvercle et procédé de fabrication de celui-ci

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP08405031A EP2088092A1 (fr) 2008-02-05 2008-02-05 Couvercle et son procédé de fabrication
CH4462008 2008-03-27
EP09707722A EP2240387A1 (fr) 2008-02-05 2009-01-19 Couvercle et procédé de fabrication de celui-ci
PCT/EP2009/000292 WO2009097961A1 (fr) 2008-02-05 2009-01-19 Couvercle et procédé de fabrication de celui-ci

Publications (1)

Publication Number Publication Date
EP2240387A1 true EP2240387A1 (fr) 2010-10-20

Family

ID=40419117

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09707722A Withdrawn EP2240387A1 (fr) 2008-02-05 2009-01-19 Couvercle et procédé de fabrication de celui-ci

Country Status (8)

Country Link
US (1) US20110000917A1 (fr)
EP (1) EP2240387A1 (fr)
AR (1) AR070557A1 (fr)
CA (1) CA2713953A1 (fr)
MX (1) MX2010008488A (fr)
RU (1) RU2010136660A (fr)
WO (1) WO2009097961A1 (fr)
ZA (1) ZA201005599B (fr)

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AR070557A1 (es) 2010-04-21
CA2713953A1 (fr) 2009-08-13
ZA201005599B (en) 2011-04-28
WO2009097961A8 (fr) 2009-10-15
US20110000917A1 (en) 2011-01-06
RU2010136660A (ru) 2012-03-27
WO2009097961A1 (fr) 2009-08-13
MX2010008488A (es) 2011-05-30

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