EP0498760B1 - Packaging - Google Patents

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Publication number
EP0498760B1
EP0498760B1 EP19920810042 EP92810042A EP0498760B1 EP 0498760 B1 EP0498760 B1 EP 0498760B1 EP 19920810042 EP19920810042 EP 19920810042 EP 92810042 A EP92810042 A EP 92810042A EP 0498760 B1 EP0498760 B1 EP 0498760B1
Authority
EP
European Patent Office
Prior art keywords
lid
tear
sealed
layer
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.)
Expired - Lifetime
Application number
EP19920810042
Other languages
German (de)
French (fr)
Other versions
EP0498760A1 (en
Inventor
Hans-Rudolf Nägeli
Hans Schindler
Heinz Oster
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.)
3A Composites International AG
Original Assignee
Alusuisse Lonza Services Ltd
Alusuisse Technology and Management Ltd
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 to CH332/91 priority Critical
Priority to CH33291A priority patent/CH683175A5/en
Application filed by Alusuisse Lonza Services Ltd, Alusuisse Technology and Management Ltd filed Critical Alusuisse Lonza Services Ltd
Publication of EP0498760A1 publication Critical patent/EP0498760A1/en
Application granted granted Critical
Publication of EP0498760B1 publication Critical patent/EP0498760B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D77/00Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10Container closures formed after filling
    • B65D77/20Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024Container 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D1/00Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/34Trays or like shallow containers
    • B65D1/36Trays or like shallow containers with moulded compartments or partitions

Description

  • The present invention relates to a packaging with a round or oval shape in plan view, containing a bottom part with two or more compartments and a lid, the lid being divided into lid segments, each lid segment covering one compartment, each lid segment on the bottom part corresponding to the size of the respective compartment is sealed and each lid segment is completely or partially peelable, peelable or peelable according to the size of the compartment via the sealed seam.
  • Packaging of this type is e.g. Known as dinner bowls, and intended to hold food assortments. The individual compartments can be loaded with various filling goods, then closed with a lid and e.g. be sterilized. The lid is usually sealed on the flat surfaces provided for this purpose on the upper outer edge and any dividing webs that may be present. Thus, the entire filling material is tightly sealed from the outside and the various filling materials in the various compartments are also sealed from one another.
  • Packing units of this type, if they have at least two chambers, are also known as multi-compartment trays.
  • EP-A-0 386 416, for example, describes an easy-to-open package with a sealed-on cover part and a lower part, a tear-open area being delimited in the cover part by a line of weakness. These lines of weakness are located on the lid material within the sealed seams. The sealing seams remain intact during the opening process, the cover material tears along the weakening lines and releases the goods. This arrangement has the disadvantage that owing to the fact that the lid material remains along the lower part edge flanges, unsightly dosage forms arise and may only partially drains a compartment. Furthermore, lines of weakness tend not to tear and the tear line does not undesirably continue along the line of weakness, but rather in an uncontrolled manner across the cover material.
  • EP-A-0 398 316 describes a packaging for containers in the medical field.
  • They become rectangular containers with four rounded corners, with a marking aid in the form of a serrated sealing seam being provided in one corner.
  • Since the container recess has rounded corners and the shoulder areas fill the entire rectangle, such serrated sealing seams can be arranged.
  • No. 4,909,411 describes round containers, wherein a lid can be applied over the entire shoulder area with a stepped seal and can therefore be removed again with stepped tear-open forces.
  • A package is known from DE-A-26 45 922, the lower part of which consists of a PVC-PE film and the upper part of which consists of a cellophane-PE combination with a polyvinylidene chloride coating, the packaging being designed as an example and divided into two departments is.
  • This publication forms the basis of claim 1.
  • When choosing round base parts with a corresponding sealed round lid, the lid can only be opened with undue force, even if a pull tab is present. This is particularly the case when the materials and the connection between the base and lid have to withstand the sterilization conditions. Under certain circumstances, this also leads to a menu bowl slipping away from the consumer, which can have unforeseeable consequences. If the base part is thin, e.g. In the case of so-called unstable or semi-rigid packaging containers, the container can collapse or fold in the middle when the lid is torn open. The annoying consequences for the user are also foreseeable here.
  • The object of the present invention is to propose a packaging which does not have the disadvantages mentioned and in particular enables sterilization treatment and later permits the easy opening of a sealed lid.
  • According to the invention, this is achieved in that each cover segment has a sealing seam for tearing aid, which is shaped in the form of an arc with a narrow radius or a tip, or in that each lid segment has a tearing aid in the form of serrations or arches of the sealing seam over a partial area, which Scribing aid is located in a corner area of the respective compartment and that the bottom part and the lid have a polyolefin or polyester layer at least on the side facing the inside of the container, and that the packaging can be sterilized after the lid segments have been filled and sealed.
  • Such containers can contain, for example, a bottom part in the form of a bowl or cup.
  • The bottom parts can be divided into compartments of any number and shape within the bowls or cup shape. The subdivision within the container can be made by molded or inserted webs. The webs can be formed, for example, by deep drawing, casting, injection molding or folding in one step in the manufacture of the floor or by subsequently glued into the bottom part. The webs can be attached, for example, to form a triple container in a T or Y arrangement.
  • Bottom parts with 2 to 12 compartments are preferred, containers with 2 to 4 compartments are particularly preferred and the containers generally have 2 or 3 compartments.
  • The diameter or the maximum width and length is not critical per se and is normally 8-30 cm. The height of such floor parts depends on practical requirements and can be, for example, 1 to 20 cm. Bottom parts with an average diameter of 16-20 cm and 2-5 cm in height are preferred. The external dimensions also suitably depend on the circumstances, such as norms and standard sizes, for example in the case of food packaging, according to the device sizes which are used for further processing.
  • The base parts and lids can, depending on their intended use, the desired strength and the selected type of deformation, be produced using various materials, such as, for example, plastics, natural and artificial cellulosic materials, metal or combinations, mixtures or laminates thereof.
  • Such materials are known per se and the plastics can, for example, thermoplastic polymers on acetal, acrylic, amide, arylene sulfide, arylene sulfone, arylene carbonate, carbonate, cellulose, ester, imide, olefin, styrene and Vinyl halide base are called or represent suitable mixtures thereof.
  • The bottom parts and lids have a polyolefin or polyester layer on the side facing the inside of the container.
  • Examples include polyolefins, such as polyethylene, such as high-density polyethylene (HDPE, density greater than 0.944 g / cm 3 ), medium-density polyethylene (MDPE, density 0.926-0.940 g / cm 3 ), linear medium-density polyethylene (LMDPE, Density 0.926-0.940 g / cm 3 ), low density polyethylene LDPE, density 0.910-0.925 g / cm 3 ) and linear Low density polyethylene (LLDPE, density 0.916-0.925 g / cm 3 ), polypropylene, poly-1-butene, poly-3-methylbutene, poly-4-methylpentene and copolymers or coextrudates thereof, such as, for example, of polyethylene with vinyl acetate, Acrylic acid, methacrylic acid, acrylic esters, tetrafluoroethylene or polypropylene, as well as statistical copolymers, block copolymers or olefin polymer-elastomer mixtures. HDPE and polypropylene are preferred.
  • Polyesters are, for example, polyalkylene terephthalates or polyalkylene isophthalates with alkylene groups or radicals with 2 to 10 carbon atoms or alkylene groups with 2 to 10 C atoms which are interrupted by at least one -O-, e.g. Polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate (polytetramethylene terephthalate), polydecamethylene terephthalate, poly-1,4-cyclohexyldimethylol terephthalate or polyethylene-2,6-naphthalene dicarboxylate or polyalkylene terephthalate and polyalkylene isophthalate, e.g. 1 to 10 mol%, mixed polymers and terpolymers, as well as block polymers and grafted modifications of the above-mentioned substances.
  • The thermoplastics based on esters are expediently polyalkylene terephthalates with alkylene groups or radicals having 2 to 10 carbon atoms and polylaylene terephthalates, with alkylene groups or radicals having 2 to 10 carbon atoms which are interrupted by one or two -O-.
  • Preferred thermoplastics based on esters are polyalkylene terephthalates with alkylene groups or radicals having 2 to 4 carbon atoms, and polyethylene terephthalates are very particularly preferred.
  • The base parts can be produced from these plastics by, for example, casting, injection molding, deep-drawing or folding and can consist, for example, of polyolefins or polyesters. The bottom parts and lids can also be made of plastic-containing materials, e.g. Films, laminates, laminates or film composites containing the plastics mentioned are produced.
  • The films as such or as part of a laminate can be uniaxially or biaxially stretched.
  • With such films, laminates, laminates or film composites, a barrier layer against gases and vapors can also be provided. Suitable are e.g. metallic and ceramic barrier layers, as well as plastic barrier layers.
  • Metallic layers are e.g. Foils made of metal, such as copper, tin, preferably aluminum or aluminum alloys and in particular foils thereof in thicknesses of e.g. 3 to 400 µm, expediently 4 to 200 µm, preferably 4 to 100 µm and in particular 8 to 20 µm.
  • Other barrier layers, such as ceramic layers, contain, for example, oxides from the series of silicon oxides, aluminum oxides, iron oxides, nickel oxides, chromium oxides or lead oxides or mixtures thereof. The silicon oxides or aluminum oxides are expedient as ceramic layers. The silicon oxides can have the formula SiO x , where x preferably represents a number from 1 to 2, particularly preferably from 1.1 to 1.9 and in particular from 1.2 to 1.7. The aluminum oxides can have the formula Al y O z , where y / z is, for example, a number from 0.2 to 1.5 and preferably from 0.65 to 0.85.
  • The ceramic layer is, for example, by a vacuum thin film technique, expediently based on electron beam evaporation or resistance heating or inductive heating from crucibles, e.g. on a plastic layer. Electron beam evaporation is preferred. The described methods can be carried out reactively and / or with ion support. The ceramic layer can have a thickness of, for example, 5 to 500 nm.
  • Plastic barrier layers can, for example, consist of or contain polymers that are particularly gas and water vapor tight. Behave particularly favorably e.g. Polyvinylidene chlorides, polyolefins, polyvinyl chlorides, acrylonitrile copolymers or biaxially stretched polyethylene terephthalate or ethylene-vinyl alcohol.
  • The thickness of the individual plastic films in film composites or laminates can be, for example, 8 to 2000 μm, preferably 10 to 600 μm and in particular 12 to 25 μm.
  • Foil composites or laminates can have the layer structures known per se, such as e.g. containing at least two plastic layers, at least one plastic layer and at least one metal layer or containing at least one cellulose-containing layer and / or plastic layers and / or metallic layers.
  • The bottom parts can also be made with outer layers of metal, for example aluminum, aluminum alloys, tin, tinplate and the like. In particular, the bottom parts can be produced with aluminum foil, aluminum tape or aluminum thin tape by deepening or folding.
  • The bottom parts can also be made with outer layers of cellulose-containing materials such as paper, cardboard, cardboard, paper-containing molding compounds, etc.
  • In all embodiments, at least one printed, counterprinted or colored layer of a material, e.g. a plastic film may be provided.
  • At least one of the layers can be insulating and made of closed-cell plastic foam, e.g. made of styrofoam or other materials, e.g. Crepe paper or similar consist.
  • In order to connect the base part to the cover, in particular in a sealing manner, sealable layers or sealing layers can be used. The side of the base parts and / or lid directed towards the inside of the container have polyolefin or polyester layers. These layers can be made of sealable material qualities.
  • Sealing layers can also be arranged between the base part and the lid. Such sealing layers can be arranged in various ways.
  • On the inside, at least on the edge areas or on the edge flanges and the web areas for support and sealing Sealing layers can be attached to the lid or to the entire inside of the base part.
  • The lid can have a sealing layer or a layer of sealing wax on the surface of the lid material that lies on the inside of the container. If necessary, the cover material can also have a sealing layer or varnish on the outside.
  • The sealing layer or sealing wax on the inside of the cover can extend over its entire surface or can be present or applied only partially, in the area of the sealing to be carried out. Accordingly, it is possible that only the base part, in particular on the side facing the cover or the cover, in particular on the side facing the base part, or both base part and cover each have a sealing layer and / or a sealing wax.
  • The sealing layers are known per se and can, for example, contain or consist of LLDPE, LDPE, MDPE, HDPE, polypropylene, polyethyleneterephthalate and heat seal lacquers and can for example have a thickness in the range from 1 to 100 μm.
  • The various layers and in particular the plastic films or layers with one another, metal foils or layers with one another, ceramic layers or plastic films or layers and metal foils or layers with one another and with one another can be connected to one another with laminating adhesives and / or adhesion promoters.
  • Suitable adhesion promoters are, for example, vinyl chloride copolymers, vinyl chloride-vinyl acetate copolymers, polymerizable polyesters, vinylpyridine polymers, vinylpyridine polymers in combination with epoxy resins, butadiene-acrylonitrile-methacrylic acid copolymers, phenolic resins, rubber derivatives, acrylic resins, acrylic resins with phenol or epoxy resins or organosilicon compounds, such as organosilanes.
  • Examples of organosilanes are alkyltrialkoxysilanes with an amino functional group, alkyltrialkoxysilanes with an ester functional group, alkyltrialkoxysilanes with an aliphatic functional group, alkyltrialkoxysilanes with a glycidoxy functional group, Alkyltrialkoxysilane with methacryloxy functional group, and mixtures thereof. Examples of such organosilanes are γ-aminopropylenetriethoxysilane and N-β- (aminoethyl-γ-aminopropyltrimethoxysilane, γ- (3,4-epoxycyclohexyl) ethyltrimthoxysilane, γ-glycidoxypropyltrimethoxysilane, and γ-methacryloxiloxane trimethane compounds known in the art.
  • EAA (ethylene acrylic acid) or modified polyolefins are preferred.
  • Examples of modified polyolefins are acid-modified polyolefins and accordingly plastics, formed by graft modification of a polyolefin with ethylenically unsaturated carboxylic acids or their anhydrides. As base polymers of the polyolefins e.g. Low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, homopolypropylene, ethylene-propylene copolymers, polybutene-1, polypentene-1, butene-1-propylene, copolymers and butene-1-propylene-ethylene terpolymers to be named. Homopolypropylene and ethylene-propylene copolymers are preferred.
  • Examples of the ethylenically unsaturated carboxylic acids or their anhydrides are acrylic acid, methacrylic acid, maleic acid, fumaric acid, crotonic acid, itaconic acid, citraconic acid, 5-norbornene-2,3-dicarboxylic acid, maleic anhydride, citraconic anhydride, 5-norbornene-2,3-dicarboxylic acid anhydride Tetrahydrophthalic anhydride. Maleic anhydride is preferred.
  • The preferred modified polypropylene is an adduct of maleic anhydride and an ethylene-propylene copolymer. Dispersions of modified polyolefins are very particularly preferred. An example of a modified polypropylene dispersion is Morprime (trademark of Morton Chemical Division of Norton Norwich Products, Inc.).
  • Further suitable adhesion promoters are adhesives such as nitrile rubber-phenolic resins, epoxies, acrylonitrile-butadiene rubber, urethane-modified acrylics, polyester-co-polyamides, hot-melt polyesters, polyisocyanates crosslinked with hot-melt polyesters, polyisobutylene-modified styrene-butadiene acid-mixed polymers, urethane-urethanes, mixed polymers and ethylene vinyl acetate copolymers.
  • If, for example, laminating adhesives are used between the plastic layers, the laminating adhesives can be solvent-based or solvent-free and also contain water. Examples are solvent-based or aqueous acrylate adhesives or solvent-free polyurethane adhesives.
  • Laminating adhesives based on polyurethane are preferred.
  • The present packaging also contains a lid. The lid can contain the same materials or can be constructed using materials as mentioned above.
  • The actual base parts and lids can be made of the same materials and in the same embodiment. In practice, it may also be expedient to provide, for example, a rigid or semi-rigid base part and a lid in an easily bendable, i.e. for example, as a film or made of film tape to use.
  • An embodiment can also be selected in which both the base part and the lid are made from a film or composite film. Such pouch-like packages can be supported by a support device, e.g. made of paper or cardboard, which are given any necessary inherent stability.
  • Other embodiments may be constructed using a semi-rigid or rigid base and a semi-rigid or rigid lid.
  • This also enables various effects of the presentation of the packaging, such as an opaque rigid or semi-rigid base and a transparent, possibly soft lid.
  • As mentioned above, the lid can be made of different materials in different thicknesses.
  • Rigid or soft, deformable and, in particular, windable materials are available. As an example, reference is made to deep-drawn or cast hard plastic lids, possibly in a layer structure. Such lids can e.g. contain or consist of all the thermoplastics or plastics mentioned and consist, for example, of polyolefins or polyesters or contain these plastics. Analogously, these lids can contain the barrier layers described above. Other lids can be made of cardboard, paper or cardboard layers which are covered with at least one metallic layer and / or plastic layer. A sealing layer can be applied on one or both sides of the cardboard, paper or cardboard layer, in particular as top layers of the respective composite.
  • Films, film composites and laminates or laminates are particularly suitable for machine processing. To ensure that these materials remain windable, such films, film composites and laminates are generally 8 to 1000 µm thick. Examples of this are sealable foils made of e.g. containing or consisting of high density polyethylene (HDPE), medium density polyethylene (MDPE), polypropylene, or polyethylene terephthalate, e.g. in a thickness in the range of 8 to 100 microns, suitably 10 to 70 microns and preferably 30 to 50 microns.
  • Other lid materials can be film composites, built up from the inside out, optionally from a sealing layer, as mentioned above, a polyolefin or polyester layer, a barrier layer, as mentioned above, and in particular a layer of a film made of aluminum or an aluminum alloy with a thickness of for example 3 to 50 microns, suitably 4 to 20 microns and particularly suitably from 8 to 12 microns, or from a film, for example from a polyethylene terephthalate film, an oriented polyamide or polypropylene film or polyethylene film, which has at least one side with a ceramic coating, preferably an SiO x layer, as described above, and optionally further plastic layers or plastic laminates.
  • The outermost layer can in turn be a sealable layer or a colored, printed or counter-printed layer. The composite laminates, as mentioned in the present description, can be produced in a manner known per se, for example by coating, coextrusion coating, laminating, counter-laminating or hot calendering.
  • In practice, for example, floor parts are preferred which have the following structure from the outside in: a polypropylene layer, a barrier layer made of ethyl vinyl alcohol and a polypropylene sealing layer, the thickness of the composite being able to vary between 0.5 and 2 mm. The barrier layer in this composite can also consist of an aluminum foil, for example in a thickness of 20 to 10 μm, or a barrier layer made of SiO x , where x represents a value of 1.2 to 1.7, can be applied to the plastic layer of polypropylene be.
  • The lid material can be, for example, a lid tape made of an outer layer of polyethylene terephthalate with a thickness of 12 to 30 µm, an aluminum foil with a thickness of 20 to 50 µm and an inner layer, which is also a peel layer, made of polypropylene from 20 to 50 µm be formed. Another exemplary cover tape contains, as an outer layer, an aluminum foil with a thickness of 50 to 100 μm and a polypropylene layer on the inside, which is at the same time a peeling layer with a thickness of 20 to 50 μm.
  • The above-mentioned individual layers can be connected to one another in a manner known per se, for example by means of a lacquer laminator and optionally a pre-lacquer, to form the corresponding laminates or composites.
  • Rondelles which correspond to the base part to be closed can be produced from the cover materials by punching or cutting, optionally stacked and brought continuously or individually onto the base part and sealed cold or hot, welded or glued on. The lid material can also be processed into continuous material, sheets or wraps, with the lid material being sealed or welded or glued to the bottom part continuously or stepwise and essentially the edge contours to close the bottom parts of the respective bottom part are separated.
  • The lid can be attached to the respective base parts by various methods, for example by heat or cold sealing, welding or gluing, with hot sealing being preferred. Furthermore, the lids can be divided into the segments in various ways.
  • For example, a lid can be sealed onto the bottom part in such a way that the sealing seam is sealed on the bottom part to form lid segments, depending on the extent of each compartment, in such a way that weakening or separation in the form of a tear or separating line of the lid material is carried out between the individual lid segments .
  • According to another method, a lid can be sealed onto the bottom part in such a way that the sealing seam is sealed on the bottom part to form cover segments, the extent of each compartment, in such a way that weakenings or separations in the form of the lid material between the individual lid segments that form in the process of tear or dividing lines are present.
  • According to a further method, cover segments can be sealed on the base part, each cover segment covering a compartment and the cover segments being sealed to the base part by forming a sealing seam along the circumference of each cover segment.
  • The covers, whether as rondelles or as continuous material, sheets or wraps, can be provided with weaknesses or separations in the form of tear lines or separating lines by mechanical, physical or chemical processes before they are sealed onto the respective base part. The tear or dividing lines in the lid should expediently correspond to the separating webs provided in the base part in the center and possibly following the edge flange. The weakenings in the cover material can be achieved by partial or complete weakening along the intended tear or separation line or partial or complete separation through the thickness of a film. In a film composite or laminate, individual or all layers can be weakened and / or be separated. If separations or weakenings are made to the lid material before sealing, it can be helpful to provide a support or adhesive device on the lid material to maintain the shape. The already segmented cover material or a cover material divided into separate lines of weakness is temporarily attached to this support or adhesive device. After sealing, the temporary support or adhesive device can be easily removed and used if necessary. This device can be, for example, a film, a film composite or a dimensionally stable substrate.
  • The cover material can also first be sealed from the surface onto the base part along the edge flanges and webs and after the sealing, weakening or separations in the form of tears, for example in the center of the webs and optionally along the edge flange of the respective base part, by means of mechanical, physical or chemical methods - or dividing lines are attached.
  • The sealing seams can be, for example, 1 to 6 mm, suitably 2 to 5 mm and preferably 2.5 to 3.5 mm wide around the edges of each cover segment. The sealing seams on the webs are preferably so wide that if the lid material is separated or weakened after sealing, the tool tolerances of the separating device are taken into account and each side of a two-part sealing seam has the widths specified above. Double seal seams can also be provided on the webs in particular.
  • The weakenings or separations can be carried out mechanically, such as cutting, punching or scoring with knives, physically by heat treatment, laser beams, electron beams, spark erosion, dissolving or swelling by means of solvents or by chemical reaction, for example by etching.
    The dividing or tear lines must be at least as deep and wide, respectively. Tear-resistant should be selected so that only the cover segment in question is pulled off at the latest when the respective cover segment is removed from the base part.
  • Complete separation of the cover segments is particularly preferred from each other to avoid tearing the peeled or adjacent lid segment.
  • Accordingly, packaging is preferred, the lid of which is divided into the individual lid segments by weakening or severing the lid material, and lids which are divided into the individual lid segments by completely severing the lid material are particularly preferred.
  • A preferred packaging according to the present invention has, as a sealed lid, an embodiment in which the lid has a profiled or recessed lid segment for each compartment or profiled or recessed individual lids are provided for each compartment. The embodiment and the processing, in particular the connection to the base part, are analogously based on the above statements.
  • On packaging according to the invention, in which the sealing seam has a marking aid of serrated or arched incisions across the width of the sealing seam over a partial area, the marking tools can be designed such that from the outside, the inside or also e.g. alternately from the outside and inside of the sealing seam, serrated or arcuate recesses in part of the width of the sealing seam over a relatively small length, e.g. 1 to 5 cm, not to be sealed. This measure is achieved by appropriately designed sealing tools.
  • The marking aids of serrations or arches can be located in a corner or in the middle of the outer edge of a compartment, or the marking aids can also be located, for example, in the area between two or more lid segments.
  • Packaging according to the present invention is expedient, the sealed lid containing a tear-off tongue on at least one lid segment, preferably in the area of a tearing aid.
  • If there is a marking tip, the arrangement of the tab in the area and perpendicular to the marking tip is preferred. The tear-off tongues can also be designed such that the bottom part has a counter tongue opposite the tear-off tongue of the cover segment. With tear-off tongue and counter tongue, easy handling when opening the containers is achieved. Instead of tongues, tabs or ring tabs can also be attached.
  • The sealing seams can be applied in a manner known per se. The sealing can be done by heat, high-frequency radiation or ultrasound and by means of sealing tools. Typical sealing temperatures are from 100 to 300 ° C and expedient from 150 to 250 ° C. The pressure of the sealing tools can be, for example, from 10 to 400 kg / cm 2 and expediently from 40 to 150 kg / cm 2 . The sealing times can be from 0.2 to 3 seconds and expediently from 0.4 to 2 seconds. The sealing seams applied under these conditions can easily be peeled off, peeled or peeled to form a cohesive or adhesive break.
    It can also be provided that the cover segments cannot be completely peeled off or peeled off by applying the weakening lines or dividing lines and / or sealing seams of different strengths. This means that the lid segments of the individual compartments release the compartment and its contents, but remain adhered to the base part with part of the sealed seam. In particular, this can reduce a waste problem, namely that the lid segments are thrown away individually, or the compartments can be reclosable.
  • The following figures illustrate the present invention in more detail.
    • FIG. 1 shows a top view of an example of a round bottom with three compartments (triple shell).
    • FIG. 2 shows the top view of an exemplary embodiment Lid for use on a base part according to FIG. 1.
    • FIGS. 3 to 5 show top views of further exemplarily designed lids for use on different base parts.
  • According to FIG. 1, the edge flange (11) delimits the base part and the webs (12, 13) divide the base part into a triple shell.
  • The corresponding cover is outlined in FIG. The hatched areas (14) represent the sealed seams. Examples are given as (1) to (10) positions at which tear-off tabs or tear-off tabs can be attached. The positions are exemplary and in practice only one tear-off tongue and tear-open tab, and possibly also a retaining tab, are usually provided for each cover segment. The tear-off tabs (1, 4 and 7) are the preferred places of attachment since there are small peeling forces required due to the tight radii (24) of the sealing seams or tip points (21, 27). Positions (2, 5) and (8) represent - for comparison - non-optimal positions. Positions (6) and (9) also represent suitable positions for tear-off tabs or tear-open tabs. For example, the positions are preferred from the handling (1) and (4) or (3) and (9) in order to be able to pull off the cover segments against each other. Attaching a tear-off tongue or tear-open tab at position (10) is one way of dispensing with one or more marginal tear-open tongues or tear-open tabs. This can be valuable for practical or aesthetic reasons. It is also possible to choose the position (10) so large that the underlying web of the base part must be chosen to be large enough that the tear-open tabs or tear-open tabs of each compartment can be provided at the position (10).
  • Marking aids (25, 28) are also shown as examples in FIG. The marking aid (25) has serrated recesses arranged on one side in the width of the sealing seam, and recesses arranged on both sides in the width of the sealing seam in the case of the marking aid (28). The dividing or tear lines (15, 16) which divide the lid into the lid segments or cut open, it is advisable to run in the center of the bar seam or double seal seam.
  • In the other versions, tear-off tabs and tear-off tabs are synonyms.
    • FIG. 3 shows a top view of an example of a lid for a triple container.
      The hatched areas (14) represent the sealed seams. The lids can be opened from the areas of the marking tips (31) by means of the tear-off tongues (30). The tear-off tongues are designed in such a way that they do not protrude beyond the outer circumference of the container. The dividing or tear lines (35, 36) divide the lid into lid segments.
    • FIG. 4 shows a plan view of a lid, which is divided, for example, into three lid segments to cover a triple shell. The hatched areas (14) mean the sealing seams, the dividing or tear lines (45, 46) indicate the contours of the cover segments. Various tear-off tabs (40) and scribing tips (41) are shown in exemplary form.
    • FIG. 5 shows a plan view of a cover, which is divided into two cover segments for covering a two-compartment shell, for example.
      The dividing line or tear line (55) divides the lid into two segments. The hatched areas (14) mean the sealing seams. The lid segments can be pulled off the bottom part of the container independently of one another by means of the tear tongues (50). To make it easier to pull off (peel, peel), each tip (50) has tip points (51).
  • The packaging is suitable for holding any kind of filling, but especially for holding food. The food can be filled raw or in a form ready for consumption. After filling and sealing the lid, the packaging is sterilized, for example in the standard sterilization conditions at 121 ° C - 130 ° C, 2.2 bar - 3.5 bar and for 30 seconds to 30 minutes. The filled packaging can be stored at room temperature, chilled or frozen and warmed before use, e.g. be heated in a water bath or to boiling temperature. To remove the contents, each lid segment can be used individually, e.g. according to the order of removal.
  • Uses are e.g. Packs for portion consumption or assortment packs.
  • Example:
  • A bottom part, as shown in Figure 1, made of a polypropylene - - shell with 10 mm wide webs and 5 mm wide edge flange is filled with filling material and a lid made of polypropylene-aluminum composite at 220 ° C, 6 bar pressure, (40 kg / cm 2 ) sealed for 0.75 sec.
    The sealed container is sterilized for 30 minutes at 121 ° C and 2.2 bar back pressure. Subsequently, at a peeling angle of 135 ° and a test speed of 100 mm / min, the peeling forces and tear forces at the tear-off tongues or Tear tabs in positions (1 to 10) determined according to Figure 2. The fracture pattern shows an even cohesive fracture.
  • The measured values are listed in Table 1. Table 1 Tear tab 1 Marking force [N] 17.5 Tear strength [N] 12.0 2nd 47.0 - 3rd 18.5 13.0 4th 16.0 12.0 5 41.0 - 6 19.0 - 7 28.0 10.0 8th 36.0 - 9 16.0 12.5 10th 31.0 13.0
  • The fracture pattern shows an even, clean cohesive fracture in all cases.

Claims (6)

  1. Package with a round or oval shape when viewed from above, containing a bottom part with two or more compartments and a lid, wherein the lid is divided into lid segments, each lid segment covers one compartment, each lid segment is sealed on to the bottom part around the circumference of the respective compartment and each lid segment can be completely or partially peeled off or stripped off around the circumference of the respective compartment via the sealed seam (14), characterised in that each lid segment has a sealed seam in the form of an arc of narrow radius or a point as a tear-off aid (21, 24, 27, 31, 41, 51, 61), or that each lid segment has a tear-off aid in the form of zig-zag or arcuate notches (25, 28) over a partial region of the sealed seam, the tear-off aids (21, 24, 25, 27, 28, 31, 41, 51, 61) each being situated in a corner region of the respective compartment, and that the bottom part and the lid have a polyolefin or polyester layer at least on the side directed towards the inner face of the container, and that the package can be sterilised after filling and sealing of the lid segments.
  2. Package according to claim 1, characterised in that the lid is divided into the individual lid segments by means of weakening or separation of the lid material
  3. Package according to claim 1, characterised in that the sealed-on lid consists of a strip-like film or a laminate.
  4. Package according to claim 1, characterised in that the sealed-on lid consists of one lid segment thermoformed for each compartment.
  5. Package according to claim 1, characterised in that each lid segment contains a tear tongue or tear tab (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 30, 40, 50, 60) in the region of a tear-off aid (21, 24, 25, 27, 28, 31, 41, 51, 61).
  6. Package according to claim 1, characterised in that the bottom part and the lid are provided with a high-density polyethylene (HDPE) layer, a polypropylene layer or a polyalkylene terephthalate layer on the side directed towards the inner face of the container.
EP19920810042 1991-02-04 1992-01-23 Packaging Expired - Lifetime EP0498760B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CH332/91 1991-02-04
CH33291A CH683175A5 (en) 1991-02-04 1991-02-04 Packaging.

Publications (2)

Publication Number Publication Date
EP0498760A1 EP0498760A1 (en) 1992-08-12
EP0498760B1 true EP0498760B1 (en) 1997-09-03

Family

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EP19920810042 Expired - Lifetime EP0498760B1 (en) 1991-02-04 1992-01-23 Packaging

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US (1) US5353985A (en)
EP (1) EP0498760B1 (en)
CA (1) CA2060120A1 (en)
CH (1) CH683175A5 (en)
DE (1) DE59208835D1 (en)
ES (1) ES2109328T3 (en)

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Also Published As

Publication number Publication date
EP0498760A1 (en) 1992-08-12
CA2060120A1 (en) 1992-08-05
US5353985A (en) 1994-10-11
ES2109328T3 (en) 1998-01-16
DE59208835D1 (en) 1997-10-09
CH683175A5 (en) 1994-01-31

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