EP0064948B1 - Procédé pour la fabrication de couvercles avec une bande de fermeture couvrant au moins un trou de versement, en particulier pour des boîtes de boisson - Google Patents

Procédé pour la fabrication de couvercles avec une bande de fermeture couvrant au moins un trou de versement, en particulier pour des boîtes de boisson Download PDF

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Publication number
EP0064948B1
EP0064948B1 EP82810184A EP82810184A EP0064948B1 EP 0064948 B1 EP0064948 B1 EP 0064948B1 EP 82810184 A EP82810184 A EP 82810184A EP 82810184 A EP82810184 A EP 82810184A EP 0064948 B1 EP0064948 B1 EP 0064948B1
Authority
EP
European Patent Office
Prior art keywords
plastisol
adhesive primer
lid
closure strip
layer
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.)
Expired
Application number
EP82810184A
Other languages
German (de)
English (en)
Other versions
EP0064948A2 (fr
EP0064948A3 (en
Inventor
Oldrich Stanek
Siegfried Bloeck
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.)
Alcan Holdings Switzerland AG
Original Assignee
Schweizerische Aluminium 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
Application filed by Schweizerische Aluminium AG filed Critical Schweizerische Aluminium AG
Priority to AT82810184T priority Critical patent/ATE21077T1/de
Publication of EP0064948A2 publication Critical patent/EP0064948A2/fr
Publication of EP0064948A3 publication Critical patent/EP0064948A3/de
Application granted granted Critical
Publication of EP0064948B1 publication Critical patent/EP0064948B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/56—Three layers or more
    • B05D7/58—No clear coat specified
    • B05D7/584—No clear coat specified at least some layers being let to dry, at least partially, before applying the next layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/38—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
    • B21D51/383—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures scoring lines, tear strips or pulling tabs
    • 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
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/50—Non-integral frangible members applied to, or inserted in, preformed openings, e.g. tearable strips or plastic plugs
    • B65D17/501—Flexible tape or foil-like material
    • B65D17/505—Flexible tape or foil-like material applied to the external and internal part of the container wall
    • 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
    • B65D53/00—Sealing or packing elements; Sealings formed by liquid or plastics material
    • B65D53/08—Flexible adhesive strips adapted to seal filling or discharging apertures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2202/00—Metallic substrate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2202/00—Metallic substrate
    • B05D2202/20—Metallic substrate based on light metals
    • B05D2202/25—Metallic substrate based on light metals based on Al
    • 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
    • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/0001—Details
    • B65D2517/001—Action for opening container
    • B65D2517/0013—Action for opening container pull-out tear panel, e.g. by means of a tear-tab
    • 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
    • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/0001—Details
    • B65D2517/0058—Other details of container end panel
    • B65D2517/0059—General cross-sectional shape of container end panel
    • B65D2517/0061—U-shaped
    • 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
    • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/50—Non-integral frangible members applied to, or inserted in, a preformed opening
    • B65D2517/5002—Details of flexible tape or foil-like material
    • B65D2517/5008—Details of flexible tape or foil-like material with a sealing coat
    • 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
    • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/50—Non-integral frangible members applied to, or inserted in, a preformed opening
    • B65D2517/5002—Details of flexible tape or foil-like material
    • B65D2517/5024—Material
    • B65D2517/5032—Laminated
    • 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
    • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/50—Non-integral frangible members applied to, or inserted in, a preformed opening
    • B65D2517/5072—Details of hand grip, tear- or lift-tab
    • B65D2517/5083—Details of hand grip, tear- or lift-tab with means facilitating initial lifting of tape, e.g. lift or pull-tabs

Definitions

  • the present invention relates to a method for producing a can lid with at least one pouring hole sealed by a sealed sealing strip, in particular made of an aluminum foil, and optionally with at least one air hole.
  • Such .Decket are mostly, especially for beverage cans, made of aluminum (pure aluminum or aluminum alloy), tinplate or tin-free steel (TFS) and are usually at least on their inner surfaces with a protective lacquer z. B. coated on a phenol-epoxy basis.
  • Such sealing strips advantageously consist of an aluminum foil with a thickness of about 0.9 to 0.14 mm, which is coated on its surface to be sealed with a coating of a thermoplastic material, for. B. is coated with a thickness of about 0.015 to 0.03 mm, usually about 0.02 mm, mostly before the application of the plastic layer, the aluminum surface is first provided with a thinner phenol-epoxy lacquer layer. On the outside, the strip is usually still covered with a decorative varnish. Strips made of an aluminum-polyamide laminate, in particular with a polyamide 12 coating, have proven very successful.
  • the lid material is painted in tape form or in panels and from this the lid is made, in which the pouring holes and, if necessary, the air holes are then punched out. As a result, the cut edges of these holes remain unprotected.
  • a plastisol layer is applied to the area of the inner surface of the lid and gelled by heat treatment.
  • the object of the present invention is to remedy this deficiency in the case of lids with punched holes which are covered by a sealed sealing strip and to create lids which are not attacked by the filling material at the cut edges of the holes. So it is essential to look for a primer that simultaneously ensures adhesion to the organic material types and covers the metal of the cut edge.
  • the sealing surface consisting of polyamide and the adhesive primer consisting of a solution of a polyacrylic ester
  • the adhesive primer is dried before applying the plastisol layer.
  • the heat treatment can be at 130 to 175 ° C for 5 sec. To 15 min. e.g. B. in an air circulating oven, with infrared radiation or with similar known means.
  • the thickness of the applied plastisol layer is preferably 0.1 to 0.25 mm.
  • Epoxidized polymethyl methacrylate in particular, has proven to be a good adhesive primer.
  • other poly " acrylic esters in particular polymethacrylic esters, especially in their epoxidized form, can be used.
  • Such adhesive primers are preferably as a 0.05 to 0.5% solution in suitable solvents, e.g. B. applied by spraying, in such an amount that the adhesive primer layer has a thickness of 0.05 to 15, preferably 0.1 to 2 g per m 2 .
  • suitable solvents e.g. B.
  • Methy ethyl ketone can be used as a solvent.
  • the primer solution dries relatively quickly on the inside of the lid. If necessary, the drying process can be done e.g. B. accelerate with a hot air shower.
  • the described pre-treatment of said region of the lid inner surfaces affects the effect 'of that the plastisol coating not only on the painted surface of the cap material but also on the exposed plastic coating adheres particularly polyamide coating of the closure strip properly.
  • the area of the sealing strip corresponding to the pouring hole is often embossed with z. B. in the form of regularly arranged elevations and depressions.
  • the plastisol in particular can be applied with a stamp-like tool with a work surface lying on one level, thereby ensuring that this application is actually carried out regularly over the entire desired area.
  • the aforementioned tool can e.g. B. look like a brush and have a number of steel pins, which are bordered at one end in a carrier plate, penetrate with their shaft a perforated bottom of a chamber for the plastisol and their flattened tips lie in one and the same plane and form the work surface.
  • the shafts of the pins are conical in the area of the perforated base in such a way that they close the base holes when the tool is at rest.
  • the pins are pushed back through the carrier plate, whereby the holes open and the plastisol flows under pressure along the pins onto the surface to be coated.
  • the illustrated lid 1 (e.g. for beverage cans, in particular beer cans) consists, for example, of tin-free steel and has a drop-shaped pouring or drinking hole 2, the longitudinal axis of which extends radially with respect to the lid.
  • This pouring hole 2 with cutting edge 3 is closed by a sealed sealing strip 4, consisting of an aluminum thin strip 5 with a polyamide 12 coating 6.
  • the width of the hole around the hole is. seam 7 about 1 to 2 mm.
  • the strip also has a free-standing grip tab 8 on which the strip can be gripped to tear it away. This tab and the area of the closure strip corresponding to the hole are provided with an embossing 9.
  • the strip material is in the area of the hole pressed into the hole in such a way that the inner surface of the strip comes to lie approximately in the same plane as the inner surface of the lid.
  • This area and the surrounding area of the lid material are pretreated on the inside with the adhesive primer and completely covered with a PVC plastisol layer 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Closures For Containers (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Claims (8)

1. Procédé pour fabriquer un couvercle de boîte (1) comprenant au moins un trou verseur (2) fermé par une bande de fermeture (4) scellée (dans le présent mémoire, sceller signifiera souder par fusion d'une pellicule de matière plastique ou équivalent), composée en particulier d'une feuille d'aluminium (5), et éventuellement au moins un trou d'entrée d'air, ce procédé consistant à traiter par un primaire d'accrochage la surface intérieure de la bande de fermeture (4) et la région de la surface intérieure de la matière du couvercle qui entoure cette surface intérieure, à déposer une couche de plastisol (10) sur la région de la surface intérieure du couvercle et à gélifier la couche de plastisol (10) par traitement thermique, ce procédé étant caractérisé en ce que le traitement, tant de la surface intérieure de la bande de fermeture (4) que de la région de la surface intérieure de la matière du couvercle qui entoure cette surface, au moyen du primaire d'accrochage se produit conjointement et simultanément avec le scellement de la bande de fermeture (4), la surface de scellement (6) étant composée de polyamide et le primaire d'accrochage d'une solution d'un polyacrylester, et en ce que le primaire d'accrochage est séché avant le dépôt de la couche de plastisol (2).
2. Procédé selon la revendication 1, caractérisé en ce qu'avant le dépôt de la couche de plastisol (2), de préférence avant le traitement préalable par le primaire d'accrochage, la région de la bande de fermeture (4) qui correspond au trou verseur (2) est enfoncée dans ce trou, de telle manière que la surface intérieure de la bande de fermeture (4) soit amenée à peu près dans le plan de la surface intérieure du couvercle.
3. Procédé selon la revendication 1 ou la revendication 2, caractérisé en ce que le primaire d'accrochage est constitué par une solution d'un polyméthacrylester, en particulier, d'un polyméthacrylate de méthyle.
4. Procédé selon la revendication 1 ou la revendication 3, caractérisé en ce que les polyesters ou polyméthylesters ou le polyméthacrylate de méthyle sont utilisés sous leur forme époxydée.
5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que la solution de primaire d'accrochage est déposée dans une quantité telle que la couche de primaire d'accrochage restante présente une épaisseur de 0,05 à 15 g/m2, de préférence de 0,1 à 2 g/m2.
6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce que le traitement thermique de la couche de plastisol déposée est exécuté à une température de 130 à 175 °C pendant un temps de 5 s à 15 mn.
7. Procédé selon l'une des revendications 1 à 6, caractérisé en ce que, lors du scellement de la bande de fermeture, le joint scellé est disposé de manière à s'étendre jusqu'au bord du trou.
8. Procédé selon l'une des revendications 1 à 7, caractérisé par une bande de fermeture faite d'une bande d'aluminium mince munie d'une enduction de polyamide scellable à chaud, en particulier, de polyamide-12.
EP82810184A 1981-05-07 1982-05-03 Procédé pour la fabrication de couvercles avec une bande de fermeture couvrant au moins un trou de versement, en particulier pour des boîtes de boisson Expired EP0064948B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82810184T ATE21077T1 (de) 1981-05-07 1982-05-03 Verfahren zur herstellung von deckeln mit einem mindestens ein ausgiessloch abdeckenden verschlussstreifen, insbesondere fuer getraenkedosen.

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH2962/81 1981-05-07
CH2962/81A CH653929A5 (de) 1981-05-07 1981-05-07 Verfahren zur herstellung eines dosendeckels mit mindestens einem durch einen aufgesiegelten verschlussstreifen verschlossenen ausgiessloch.
DE3118639A DE3118639C2 (de) 1981-05-07 1981-05-11 Verfahren zum Herstellen eines Dosendeckels aus Metall mit Ausgießloch und Verschlußstreifen dafür

Publications (3)

Publication Number Publication Date
EP0064948A2 EP0064948A2 (fr) 1982-11-17
EP0064948A3 EP0064948A3 (en) 1983-06-01
EP0064948B1 true EP0064948B1 (fr) 1986-07-30

Family

ID=25691838

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82810184A Expired EP0064948B1 (fr) 1981-05-07 1982-05-03 Procédé pour la fabrication de couvercles avec une bande de fermeture couvrant au moins un trou de versement, en particulier pour des boîtes de boisson

Country Status (5)

Country Link
US (1) US4461605A (fr)
EP (1) EP0064948B1 (fr)
JP (1) JPS57194948A (fr)
CH (1) CH653929A5 (fr)
DE (1) DE3118639C2 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH653305A5 (de) * 1982-03-05 1985-12-31 Alusuisse Verfahren zum herstellen eines dosendeckels.
DE3233106C2 (de) * 1982-09-02 1986-01-09 Schweizerische Aluminium Ag, Chippis Verfahren zum Herstellen eines Dosendeckels
US4562936A (en) * 1985-02-12 1986-01-07 The Procter & Gamble Company Easy-open laminated container with optional reclosing means and method of making
USRE33893E (en) * 1985-08-27 1992-04-21 Minnesota Mining And Manufacturing Company Reclosable closure assembly for container
US4781323A (en) * 1985-08-27 1988-11-01 Minnesota Mining And Manufacturing Company Reclosable closure assembly for container
DE3824949A1 (de) * 1988-07-22 1990-01-25 Becker Emil & Adolf Gmbh Co Getriebe fuer sektional- oder rolltore
US4946061A (en) * 1989-09-25 1990-08-07 Shell Oil Company Reclosable opening device for a container
US5103550A (en) * 1989-12-26 1992-04-14 Aluminum Company Of America Method of making a food or beverage container
US5692635A (en) * 1990-06-06 1997-12-02 American National Can Company Easy open closure
US5622745A (en) * 1994-11-16 1997-04-22 The West Company, Incorporated Method of reducing particulates from metal closures
DE10108009A1 (de) * 2001-02-20 2002-08-29 Schmalbach Lubeca Deckelabdeckung
GB0704054D0 (en) * 2007-03-02 2007-04-11 Crown Packaging Technology Inc Metal containers
WO2012145590A2 (fr) * 2011-04-20 2012-10-26 Dayton Systems Group Inc. Joint pour applications à température élevée et méthodes de fabrication de celui-ci
HUE050822T2 (hu) * 2017-04-05 2021-01-28 Gregor Anton Piech Fém dobozfedél
JP7242193B2 (ja) * 2018-04-27 2023-03-20 大和製罐株式会社 タブ、缶蓋及び缶蓋の製造方法

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE644299A (fr) * 1963-02-25
US3292828A (en) * 1964-09-17 1966-12-20 Nat Can Corp Easy opening can end
US3339788A (en) * 1965-10-22 1967-09-05 Nat Can Corp Container
GB1219989A (en) * 1968-05-22 1971-01-20 Alfred Kenneth Unsworth Can ends
US3671356A (en) * 1970-06-08 1972-06-20 Continental Can Co Method of forming a peelable seal between propylene polymer and a carboxylated polypropylene coated surface
CH557268A (de) * 1972-10-18 1974-12-31 Rausing Anders Ruben Einweg-verpackungsbehaelter.
US3981652A (en) * 1974-08-05 1976-09-21 Usm Corporation Machine for partly coating articles
DE2519709B2 (de) * 1974-09-18 1979-07-12 The Continental Group, Inc., New York, N.Y. (V.St.A.) öffnungseinrichtung an einem Deckel, insbesondere aus Metall sowie Verfahren zu seiner Herstellung
US4311741A (en) * 1978-03-30 1982-01-19 Minnesota Mining And Manufacturing Company Polyester films with improved processability and tear resistance
US4170314A (en) * 1978-10-11 1979-10-09 The Continental Group, Inc. Container closure
US4215791A (en) * 1979-08-06 1980-08-05 Minnesota Mining And Manufacturing Company Easy open closure system
DE3263987D1 (en) * 1981-03-02 1985-07-11 Toyo Seikan Kaisha Ltd Easily openable vessel closure and process for preparation thereof
US4378074A (en) * 1981-05-18 1983-03-29 Minnesota Mining And Manufacturing Company Easy open closure system

Also Published As

Publication number Publication date
EP0064948A2 (fr) 1982-11-17
CH653929A5 (de) 1986-01-31
EP0064948A3 (en) 1983-06-01
DE3118639C2 (de) 1986-03-27
JPS57194948A (en) 1982-11-30
US4461605A (en) 1984-07-24
DE3118639A1 (de) 1982-11-18

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