WO2006097166A1 - Emballage refermable - Google Patents

Emballage refermable Download PDF

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Publication number
WO2006097166A1
WO2006097166A1 PCT/EP2006/001149 EP2006001149W WO2006097166A1 WO 2006097166 A1 WO2006097166 A1 WO 2006097166A1 EP 2006001149 W EP2006001149 W EP 2006001149W WO 2006097166 A1 WO2006097166 A1 WO 2006097166A1
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WO
WIPO (PCT)
Prior art keywords
adhesive
layer
film
edge
adhesives
Prior art date
Application number
PCT/EP2006/001149
Other languages
German (de)
English (en)
Inventor
Thomas Renger
Jürgen Fett-Schudnagis
Michael Drobnik
Norbert Bialas
Original Assignee
Henkel Kommanditgesellschaft Auf Aktien
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 Henkel Kommanditgesellschaft Auf Aktien filed Critical Henkel Kommanditgesellschaft Auf Aktien
Publication of WO2006097166A1 publication Critical patent/WO2006097166A1/fr

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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
    • 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
    • B65D77/2068—Means for reclosing the cover after its first opening
    • B65D77/2096—Adhesive means
    • 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
    • B65D2577/2025—Multi-layered container, e.g. laminated, coated
    • B65D2577/2033—Multi-layered container, e.g. laminated, coated with one or more layers of container being torn off upon initial opening

Definitions

  • the invention relates to a resealable container for use as a package for sensitive goods, such as food or clean-stored articles of daily needs.
  • the invention relates to a method for producing such resealable container.
  • Articles of daily use such as food, animal feed, but also disposable items, such as disposable tableware or tissue paper often come in portioned form on the market to enable the consumer easier handling and to facilitate the portioning.
  • portioned foods are sausage, cheese, or snack food, such as pretzel sticks, which are already present in portioned form in the package.
  • the consumer simply has to open the packaging, remove the desired amount of food and then store the remainder until final consumption.
  • the problem is that the reclosure of such packaging is often not possible. As a result, the food remaining in the package will dry out on storage, become unsightly and lose their typical flavor. For durable items, contamination is possible or these items are disordered together.
  • the multi-layer cover film on the side facing the container has a lower film which is easily broken by mechanical stress, on this lower film a PSA is continuously present and laminated thereon at least one further tear-resistant film is.
  • This multi-layer cover sheet is attached to the edges of the container either thermally or via an additional sealant adhesive.
  • the upper film is separated in the region of the edge of the container from the lower film, it is to tear the less tear-resistant inner film.
  • the adhesive layer is exposed directly above the edge and the container is resealable with this adhesive surface.
  • a further object of the invention is to provide a method for producing a corresponding multilayer film as a cover film for a resealable packaging.
  • a resealable container consisting of a lower part with a molded-up edge and a cover covering the lower part, wherein the cover or the lower part is formed by a multilayer film consisting of at least one outer layer, one the inner part of the container
  • the adhesive layer on the edge opposite cover sheet surface or on the edge surface of the lower part entirely or partially consists of a permanent adhesive adhesive and the adhesive layer of the surface above the opening of the lower part or within the edge of the Lower part consists of a laminating adhesive.
  • the resealable container consists of a lower part with an upwardly facing integrally formed edge around the container opening, wherein the container opening including the edge is closed by a cover or can be closed.
  • the cover film is a multilayer film consisting of at least one outer layer and an inner layer facing the lower part, wherein between outer layer and inner layer an adhesive layer is present, this adhesive layer consists of two different types of adhesive. This multilayer film is with the edge of the base on several pages, usually on all sides by z. B. thermal sealing connected.
  • the lower part of the packaging may have any shape that is tailored to the intended content. It may be round or polygonal, in particular square, container. Materials for these containers are known and can be selected by those skilled in the art. These can be selected according to the requirements of the content. These containers have an edge formed around the opening. This edge must have such a width, for example 0.5 - 10 mm, that it can be permanently connected to the cover. He should essentially have a smooth surface, in particular he should just be shaped. Corresponding embodiments of the lower part of the container are known and can be taken from the literature.
  • the cover of the container is done by a multi-layer film designed according to the invention.
  • Individual components of multilayer films are already known. It can be a combination of different single sheets that are linked together.
  • This multilayer film is connected to the container at the edge in a known manner by a seal.
  • Another embodiment of the invention has the reverse construction.
  • a lower part is formed from a multilayer film formed according to the invention, while the corresponding cover film comprises a conventional single or multilayer film. Both parts are sealed together.
  • This embodiment in principle, shows an analogous principle of operation, but the embodiment described above is preferred.
  • sealing is generally understood to mean that a soft sealing medium bonds adhesively. Heat input and / or a minimum seal pressure are required for this purpose. Accordingly, a distinction is made between heat-sealing and cold-sealing, whereby the question of which type of sealing is used is, for example, of the materials used, the object to be packaged, for. B. its heat sensitivity, and the nature of the packaging machine is dependent.
  • Cold sealing employs cold seal adhesives that bond two polymer layers at room temperature under high pressure.
  • Cold seal adhesives are predominantly applied as aqueous dispersions to the polymer to be bonded and are based on rubber and rubber-like polymers, such as PVDC (polyvinylidene chloride), PVAC (polyvinyl acetate) and poly (meth) acrylates.
  • thermoplastic elastomers and extrusion coatings For heat sealing, heat-seal dispersions, heat-sealing lacquers, hot melt adhesives and films of thermoplastic elastomers and extrusion coatings are used.
  • Heat seal dispersions are predominantly PVDC, PVAC poly (meth) acrylate or latex-containing dispersions which form sealable, dry and generally transparent coatings after evaporation of the water.
  • organic solvents are used in the heat sealing lacquers using identical or similar polymers.
  • Hot-melt adhesives based on hotmelt adhesives generally contain ethylene-vinyl acetate copolymers as base materials, which are applied to the substrate by roller application or else by extrusion.
  • Thermoplastic elastomer films and extrusion coatings are also used for heat sealing, often referred to as "weld film".
  • these films are particularly preferably used as the inner layer facing the container interior.
  • PE (polyethylene) films are preferred as sealing films for sealing.
  • the multilayer film suitable according to the invention may be a combination of any number of films.
  • the multilayer film is about 20-200 ⁇ m thick, preferably 30-160 ⁇ m, and particularly preferably 50-120 ⁇ m.
  • the AU- The outer layer usually consists of polyethylene terephthalate, polyamide, biaxially oriented polypropylene, polyvinyl chloride or metal foils, for example aluminum, or paper.
  • the thickness of the outer layer is 10 to 150 ⁇ m, preferably 20 to 100 ⁇ m and particularly preferably 40 to 80 ⁇ m.
  • the outer layer is selected so that it is stable at temperatures up to 200 0 C.
  • the tear-resistant cover film may have a thickness of 10-200 ⁇ m.
  • the lower part consists of a multilayer film constructed according to the invention and may have a thickness of 30-300 ⁇ m, preferably a thickness of 50-200 ⁇ m.
  • the side of the multilayer film which is used for sealing or sealing and is referred to as inner layer is usually made of a polymeric material with low elongation at break and tear propagation resistance.
  • Polyolefins are preferably used as the polymeric material for the inner layer.
  • the polyolefins used for the inner layer include, for example, propylene copolymers, in particular ethylene-propylene-butylene copolymers, ethylene-propylene-butylene terpolymers or mixtures of these polymers.
  • the inner layer is made of high density polyethylene.
  • high density polyethylene polyethylenes which are largely linear and unbranched. These polyethylenes have crystallization degrees of 60-80% and a density of about 0.94-0.965 g / cm 3 .
  • the melting point of the polymeric material for the inner layer is generally 80-160 ° C, preferably 100-140 ° C. Such materials may preferably be heat-sealed.
  • the thickness of the inner layer is 1 to 80 ⁇ m, preferably 10 to 60 ⁇ m and in particular 20 to 50 ⁇ m.
  • pretreatment is understood to be processes with which the surface of plastics is changed in order to improve the adhesion to other materials. Methods known to those skilled in the art include, for example, the corona process or the flaming process.
  • Foils suitable for the invention for the outer layer, as well as usable materials for the edge and the lower part are described in EP 0868368 A, DE 3935480 A, US 4,913,307, DE 0160975 A and US 5145737. The skilled person can make a corresponding selection.
  • Known composite combinations of multilayer films are, for example:
  • the multilayer film suitable according to the invention is a multilayer film which has at least one outer layer and an inner layer, wherein the inner layer has a lower tear strength than the outer layer. Both layers are bonded together with an adhesive layer. The bonding of the layers is done by laminating. In this case, an adhesive is applied to a layer, preferably the outer layer, and the second layer is then applied and pressed under pressure and possibly elevated temperature. The temperature can be between 30 and 150 ° C.
  • the multilayer film is bonded together with two different adhesives.
  • a laminating adhesive is applied on the surface opposite the opening of the lower part of the container.
  • Laminating adhesives essentially have the property of bonding two films firmly and flexibly together.
  • Such adhesives are known to those skilled in the art. known.
  • laminating adhesives are known which are suitable for selected applications, for. B. for packaging food or medical articles.
  • Such adhesives are described, for example, in EP 0118065, EP 0150444, EP 0951493, EP 1030869, WO 99/33897, EP 0863935 or EP 0928317.
  • the laminating adhesive is intended to bind the films together more firmly than the tensile strength of the inner layer. Likewise, the seal should be more stable than the tear strength of the inner film.
  • Laminating adhesives can be used in various forms of application, such as aqueous dispersion, solvent-based or solvent-free adhesive.
  • the chemical composition of such adhesives can be varied within wide limits.
  • Suitable adhesives, which are also approved for use in food packaging, are often based on polyurethanes.
  • This low-monomer polyurethane prepolymers are prepared from polyfunctional alcohols and polyisocyanates. By a suitable reaction, the content of monomeric isocyanates can be lowered.
  • the isocyanates used are the diisocyanates and polyisocyanates known in polymer chemistry. These may be aliphatic, aromatic, monocyclic or polycyclic isocyanates. These may have isocyanate groups of the same reactivity or different reactivity.
  • polyether polyols polyester polyols, polycarbonate polyols can be used as the polyol component. Mixtures of diols and in small proportions also polyols can be used. The polyols used can be varied within wide limits. By selection and amount of polyols and isocyanates, the viscosity of the polyurethane prepolymers can be varied. Linear or branched prepolymers can be obtained. For example, one-component moisture-curing adhesives can be obtained from such prepolymers. When olefinically unsaturated groups are reacted, curable compositions can also be prepared by actinic radiation.
  • two-component adhesives from isocyanate group-containing prepolymers and a second component which contains isocyanate-functional groups.
  • Suitable adhesives are well known to those skilled in the art and may be selected as appropriate to the present invention.
  • Particularly suitable for the production of the multilayer film for the container according to the invention are laminating adhesives which can be applied by means of a printing unit. These are essentially thin-viscosity laminating adhesives, in particular dispersion adhesives, solvent-based adhesives or solvent-free adhesives.
  • the viscosity of these laminating adhesives should be between 1 and 10,000 mPas at the application temperature. In the case of solvent-free laminating adhesives, it is preferably 500-3000 mPas, in particular at 30-150 ° C. In the case of solvent-containing laminating adhesives, the viscosity is below 300 mPas, in particular between 1 and 100 mPas at 30 0 C. The viscosity is determined at the intended temperature with a Brookfield viscometer according to ISO 2555, at a viscosity below 100 mPas is according to DIN 53211 measured with the DIN cup. In principle, other higher-viscosity adhesives are suitable. However, a corresponding job opportunity must be given by a printing unit.
  • the laminating adhesive should be applied to the surface opposite the opening of the container. In one embodiment of the invention, this adhesive is also applied to a part of the surface of the multilayer film opposite the edge. Thus, after sealing, there is a firm bond between the covering film and the container bottom part, since in this case inner layer, laminating adhesive layer, outer layer are stably connected to the edge of the lower part, and only a part of the covering film can be reclosed from the container.
  • Another embodiment of the invention uses only on the directly opposite the opening of the multilayer film, the laminating adhesive, so that the cover can be completely separated from the base.
  • Pressure-sensitive adhesives are applied to the substrate in the form of solutions in organic solvents, as an aqueous dispersion, in a solvent-free form or else as a melt.
  • solvent-containing pressure-sensitive adhesives with aliphalic solvents, for example ethyl acetate or methyl ethyl ketone, if appropriate also hexane or heptane or low-boiling hydrocarbon mixtures.
  • Pressure-sensitive adhesives which can be used according to the invention are described, for example, in WO 01/14491, WO 98/00471, EP 1189961, US 2001/0044024 A1, US Pat. No. 3,239,478 and US Pat. No. 5,292,842.
  • Low-viscosity, solvent-free or reactive systems are also used as pressure-sensitive adhesives and optionally irradiated with UV or electron beams for post-curing.
  • raw materials for pressure-sensitive adhesives serve water-soluble and water-insoluble base polymers, plasticizers, waxes, resins, in particular tackifying resins to improve the adhesion, fillers and auxiliaries such as preservatives, antioxidants, stabilizers and dyes.
  • the base polymers are generally present in the pressure-sensitive adhesive in a concentration of up to 50% by weight, preferably in a concentration of from 5 to 40% by weight. contain. Furthermore, it is common to add at least one tackifying resin in addition to the base polymer, and in some systems the tackifying resin may also be a low molecular weight fraction of the base polymer.
  • base polymers for pressure-sensitive adhesives are generally used natural and synthetic rubbers in conjunction with modified natural resins, phenol-formaldehyde resins or hydrocarbon resins.
  • polyacrylic acid esters, polymethacrylic acid esters, polyvinyl ethers and polyisobutene types are also frequently used, usually in combinations with natural resins.
  • Such polymers and tackifying resins can be dissolved in solvents. Together with necessary additives thin-viscosity solvent-based pressure-sensitive adhesives are then obtained.
  • Dispersion adhesives are mainly based on polyacrylic acid ester dispersions or on special vinyl acetate copolymers, wherein the above-mentioned resins are also generally added here.
  • Such pressure-sensitive adhesives in aqueous dispersion may, in addition to the additives known to the person skilled in the art, also contain further small amounts of organic solvents in individual cases.
  • the viscosity can be influenced via the solids.
  • pressure-sensitive adhesive hot melt adhesives consist of known base polymers, such as block copolymers, z. Styrene-butadiene, styrene-butadiene-styrene, styrene-isoprene-styrene, ethylene-vinyl acetate polymers; Polyolefins such as polyethylene and polypropylene, especially amorphous propylene-alpha-olefins (APAO); PVAc copolymers, polyacrylates; polyamides; Polyester; Polyvinyl alcohols (PVA), polyurethanes, polystyrene; Polyepoxides, copolymers of vinyl monomers and polyalkylene oxide polymers.
  • base polymers such as block copolymers, z. Styrene-butadiene, styrene-butadiene-styrene, styrene-isoprene-styrene, ethylene-vin
  • resins in particular natural resins, are included as a further component. These are, preferably modified, aliphatic, cycloaliphatic, aromatic or alkylaromatic hydrocarbon resins.
  • waxes may be included in the pressure-sensitive adhesive up to 40% by weight.
  • the wax used may be of natural or synthetic origin. Examples are vegetable waxes, animal waxes, mineral waxes or petrochemical waxes.
  • Plasticizers may also be present in the pressure-sensitive adhesive in a concentration of up to 30% by weight.
  • the pressure-sensitive adhesive can be accompanied by customary auxiliaries and additives, such as, for example, stabilizers, fillers and / or pigments or antioxidants.
  • Radiation is to be understood here as meaning any type of radiation which causes irreversible crosslinking in the crosslinkable hot-melt pressure-sensitive adhesive layer to be irradiated.
  • Particularly suitable are UV, electron beams, short-wave visible light, but also IR radiation.
  • preferred ESH or UV irradiation some product properties can be influenced by the radiation dose.
  • the pressure sensitive adhesives suitable for the subject invention should have a low viscosity. They are to be processed and applied to printing rollers.
  • the viscosity at the processing temperature of the suitable pressure-sensitive adhesives should be between 10 and 10,000 mPas.
  • the viscosity should preferably be from 1000 to 10000 mPas, in particular from 1000 to 5000 mPas at the application temperature.
  • the viscosity should preferably be from 10 to 1000 mPas, in particular from 100 to 500 mPas at room temperature.
  • Dispersion-containing or solvent-containing pressure-sensitive adhesives in which the viscosity can optionally be adapted to the application conditions via liquid constituents are particularly suitable.
  • the PSA adhesive is preferably applied to the outer layer in the region which is opposite the edge of the lower part. It is important to ensure that laminating adhesive and. Do not mix PSA adhesive together and apply them separately. The order of the order is arbitrary, it can be applied first, if necessary, the laminating adhesive and then the PSA or vice versa. Thereafter, the other film layer is laminated immediately. This happens under pressure and possibly at elevated temperature. If necessary, the so-finished multilayer cover foil can be rolled up and temporarily stored. But it can also be fed directly to the packaging machine as a cover film.
  • a corresponding multilayer film can be produced.
  • this is then, for. B. by deep drawing, molded into a container base, wherein the edge portion is formed so that there is the adhesive layer of the PSA.
  • a cover sheet suitable for this purpose can then be produced from the materials known to the person skilled in the art. Upon opening, a permanently tacky layer is then exposed on the edge of the base.
  • the two adhesives are applied to different surface parts of the multilayer film. Due to the nature of the application method, in particular by printing the adhesive, it is possible to produce a clean, adapted to the contour of the opening of the lower part of the container shape. In this case, the two adhesives can flow together when pressing the film on the edge, but preferably they should not mix with each other, not even during the laminating process. This makes it possible, when tearing the inner foil to obtain a clean, the container opening adapted tear line.
  • the outer part of the multilayer film can be optically designed, for. B. by laminating colored intermediate layers or in particular by printing the outer layer of the multilayer film. This pressure usually occurs on the inner layer facing side of the outer layer. This printing process can be done immediately before the application of Kaschierklebstoffes.
  • the outer film can be printed continuously or it is printed only on the surface of the opening opposite the container. After printing, it is advantageous to firmly connect the ink with the film, for. B. by drying or by a chemical reaction. Thereafter, directly or even after storage, this part of the multilayer film can be supplied to the laminating process.
  • the application rate of the laminating adhesive may be 1 to 20 g / m 2 , in particular 2 to 10 g / m 2 .
  • the application amount of the dye layer is 0.5 to 10 g / m 2 , more preferably 1 to 5 g / m 2 .
  • the PSA can be applied with a layer thickness of 1 to 30 g / m 2 , in particular 3 to 20 g / m 2 .
  • the various adhesives or color amounts are preferably selected so that a substantially uniform layer thickness is obtained on the film surface.
  • the layer thickness of the adhesive layer or adhesive and ink layer is 2 to 30 ⁇ m, preferably 5 to 20 ⁇ m and particularly preferably 8 to 15 ⁇ m.
  • the adhesive strength of the films with the Kaschierklebstoff should be greater than that of the composite with the PSA adhesive.
  • the Kaschierklebstoff should ensure the most adequate connection of inner layer and outer layer of the multilayer film.
  • the should Laminating adhesive does not affect the printed image on the outer film. It should either be colorless or may have a uniform base color. If necessary, he should not start the dried printing ink again.
  • the PSA adhesive can be selected so that it has as uniform a tear resistance as possible. This can be achieved that the consumer who separates the two films can perform a simple and uniform tearing of the multi-layer film.
  • Another object of the invention is a method for producing a multilayer film as part of a resealable container.
  • the outer film is already printed in color prior to application of Kaschierklebstoffs. This can also be done by one or more anilox rollers.
  • the ink is usually applied on the side of the outer film, which is opposite to the inner film. This ensures that the printed image will not be damaged during further processing. After applying the printed image, this is to be crosslinked or dried. This can be done by known methods by elevated temperature or by chemical reaction or by radiation.
  • a liquid Kaschierklebstoff is then printed according to the invention, in a size and shape that corresponds to the opening of the resealable container.
  • This printing process the skilled artisan known printing methods, eg. B. with anilox rollers, smooth rollers, perform with flexographic printing plate. Particularly suitable are anilox rollers or flexographic printing cliché order. It must be ensured that the laminating adhesive has a suitable viscosity.
  • the outer film is already a multilayer film which may already be printed or contains other colored layers in the layer sequence.
  • the outer film can then, as described above, be coated with a printing unit with the laminating adhesive.
  • the PSA adhesive is applied to the area provided with the laminating adhesive on the intended surface.
  • This PSA adhesive should be applied to a surface opposite the edge of the base. In this case, the complete edge area can be coated, or possibly a part of the edge area is not provided with the PSA adhesive.
  • the laminating adhesive has then been applied to this part of the edge region in the previous step. This ensures that at this point a permanent connection of the cover with the container base is ensured.
  • the PSA adhesive should have the above-mentioned viscosity at the application temperature, in particular at room temperature of about 20-30 ° C.
  • a particularly preferred mode of operation performs all printing operations in succession, d. H.
  • the multilayer film is first provided with at least one color layer. After a drying process, the laminating adhesive is applied. After a second drying process, the PSA adhesive is applied. Devices for carrying out these printing processes directly one after the other are known to the person skilled in the art.
  • the inner film of the multilayer film is laminated.
  • the lamination is done by pressure and may possibly be supported by increased temperature. If radiation-curing laminating adhesives are used, it is necessary that thereafter a curing step, for. B. with UV radiation or electron beam is performed. Such systems and methods for radiation curing of adhesives are known and can be adapted by the skilled person according to the selected adhesive.
  • After laminating the film it is possible to wind up and store the film, for example. This procedure has proven to be expedient because it gives the adhesive an additional time for complete post-curing and for a good connection of both films.
  • the cover film and container bottom are made at the same time. These can then be merged before a final closure of the package. In this case, the objects to be packaged are then introduced into the container, the container provided with a previously cut to the appropriate size cover and sealed with known tools and methods, the cover on the edge of the container.
  • the inventive method it is possible that with known devices, a particularly good connection of the inner foil and outer foil is achieved.
  • the workload is low, the setting of appropriate pressure surfaces for the adhesives is easy to perform and familiar to the expert.
  • a corresponding multilayer film, produced according to the procedure according to the invention has in the middle of the surface an increased adhesion of outer layer to inner layer, which can not be separated at this point.
  • a separation of the two layers is given in particular in the area of the applied PSA adhesive. This can enable a slight separation of the two films and then expose there the permanently adhesive glue.
  • a clean boundary line between laminating adhesive and pressure-sensitive adhesive is produced. That leads to a clean tearing of the inner layer along this tear edge is made possible. This leads to a visually appealing and clean-looking separation process. Furthermore, it is possible in the operation according to the invention to optimize both adhesives for their respective application. It is thus possible to select the PSA adhesive so that it has a permanent tack repeatedly, even when stored under different temperatures, eg. B. in the fridge. Furthermore, the laminating adhesive can be selected so that the strongest possible connection of the inner layer and the outer layer is given. Furthermore, it can be selected so that no adverse effects on the interior of the container by constituents of Kaschierklebstoffs, z. B. by migration, are given.
  • the resealable containers according to the invention are designed so that a repeated closure on the separated surface is possible. They can be designed so that the covering multi-layer film is firmly connected on one side with the container bottom part; but they can also be designed so that the cover is completely removed from the container top and is to be reclosed over the entire edge surface.
  • FIG. 1 shows a section through a container according to the invention.
  • the lower part (1) has an integrally formed upwardly facing edge (2).
  • This edge should be smooth, preferably he should represent a flat surface.
  • the cover film is shown in this case as a multilayer film (3).
  • the multilayer film consists of a lower layer (4), for example of a PE material and a PSA adhesive layer (5). This is applied opposite the edge part.
  • the Kaschierklebstoff Anlagen (6) can be seen, which is located opposite the container opening.
  • the adhesive layer is covered by the outer layer (7), which may optionally have a printed image (8) on the inside.
  • FIG. 2 shows the top view of a part of the multilayer film.
  • the contour of the edge is applied with the PSA adhesive (5).
  • the laminating adhesive (6) is applied.
  • the entire edge region is covered with the PSA adhesive.
  • FIG. 3 shows a plan view in which not the PSA adhesive but the laminating adhesive (6) has been applied to a part of the edge region. This ensures when opening that the cover remains connected to the lower part.
  • FIG. 4 shows a section through an embodiment in which the covering film (3) is any suitable single-layer or multi-layer film.
  • the associated container consists of a multilayer film (8) according to the invention, which was deep-drawn, for example.
  • the lower part has an edge region, which carries on an outer layer (7) a layer of a PSA adhesive (5), as well as the cover opposite an inner layer (4). Outside the edge, d. H. Container bottom and walls, the adhesive layer consists of a laminating adhesive (6).
  • the cover can be separated from the container edge and fastened resealable.

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Abstract

L'invention concerne un récipient refermable comprenant une partie inférieure et un film de revêtement, dans lequel la partie inférieure ou le fil de revêtement sont fabriqués à partir d'un film à plusieurs couches. Ledit film à plusieurs couches comprend une couche interne tournée vers l'intérieur du récipient, une couche de colle située entre la couche interne et externe ainsi qu'au moins une couche externe, la couche de colle étant composée totalement ou partiellement d'une colle longue tenue, sur la face du bord du récipient ou de la surface opposée au bord du film de revêtement et l'autre couche de colle est composée d'une colle de laminage.
PCT/EP2006/001149 2005-03-12 2006-02-09 Emballage refermable WO2006097166A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005011500.4 2005-03-12
DE200510011500 DE102005011500A1 (de) 2005-03-12 2005-03-12 Wiederverschließbare Verpackung

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WO2006097166A1 true WO2006097166A1 (fr) 2006-09-21

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AT508995B1 (de) 2009-10-23 2011-09-15 Constantia Teich Gmbh Wiederverschliessbare verpackung
DE102016111899A1 (de) * 2016-06-29 2018-01-04 Theegarten-Pactec Gmbh & Co. Kg Verfahren zum Verpacken und Verpackungsmittel mit reaktivierbarem Kaltsiegelhaftbereich
JP2019151351A (ja) * 2018-02-28 2019-09-12 三菱ケミカル株式会社 包装体

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EP0306982A2 (fr) * 1987-09-09 1989-03-15 Idemitsu Petrochemical Co. Ltd. Emballage hermétique et procédé de sa fabrication
EP0403393A1 (fr) * 1989-06-16 1990-12-19 MECAPLASTIC Société Anonyme française Procédé d'emballage d'un produit quelconque, par exemple un produit alimentaire et emballage ainsi réalisé
FR2669607A1 (fr) * 1990-11-26 1992-05-29 Torterotot Couvercle souple de securite refermable.
EP0554152A1 (fr) * 1992-01-27 1993-08-04 SOCIETE ALSACIENNE D'ALUMINIUM Société Anonyme Récipient, notamment pot ou barquette, comportant un opercule de refermeture pourvu d'une couche de vernis à pouvoir adhérent permanent

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IT1312549B1 (it) * 1999-04-26 2002-04-22 Mauro Officine Grafiche S P A Struttura multistrato per la chiusura di contenitori, idonea allarealizzazione di contenitori richiudibili piu' volte dopo la prima

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0306982A2 (fr) * 1987-09-09 1989-03-15 Idemitsu Petrochemical Co. Ltd. Emballage hermétique et procédé de sa fabrication
EP0403393A1 (fr) * 1989-06-16 1990-12-19 MECAPLASTIC Société Anonyme française Procédé d'emballage d'un produit quelconque, par exemple un produit alimentaire et emballage ainsi réalisé
FR2669607A1 (fr) * 1990-11-26 1992-05-29 Torterotot Couvercle souple de securite refermable.
EP0554152A1 (fr) * 1992-01-27 1993-08-04 SOCIETE ALSACIENNE D'ALUMINIUM Société Anonyme Récipient, notamment pot ou barquette, comportant un opercule de refermeture pourvu d'une couche de vernis à pouvoir adhérent permanent

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