• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a biodegradable multi-layer laminate for flexible packaging, comprising: (a) a paperboard layer, and (b) a non-woven base material comprising cellulosic material, further comprising a metal layer having a thickness in the range of 10 to 250 nm, which is deposited on a first surface, the nonwoven base material being laminated to a second non-metallized surface of the paperboard layer, the metal layer being deposited using a physical vapor deposition method.
    公开号:BE1021321B1
    申请号:E2013/0361
    申请日:2013-05-23
    公开日:2015-10-29
    发明作者:Paul Emmerick；Maura Roperto；Jost Orichel
    申请人:Ar Metallizing N.V.；
    IPC主号:
    专利说明:

    BiOLQGiSCH DEGRADABLE PAPER COMPOSITE MATERIALS
    The present invention relates to a biodegradable multi-layer cardboard composite for folding cartons. The present invention further relates to a method for the manufacture of such composite materials and packaging bins comprising the new composite materials.
    Laminated cardboard materials are used everywhere. These usually multi-layer composite materials are prepared by laminating cardboard with aluminum foil, or with optionally metallized polymer materials, such as polyethylene terephthalate (PET) and such polyesters, or polyolefins, whereby the composite material can be provided with a high-gloss surface, as described for example in US 3972467, GB-A-1218042 or US-A-3416411.
    Recent approaches to manufacturing such biodegradable materials use biodegradable polymers instead of PET, such as, for example, the laminate described in US-A-6312823.
    For metallized folding packaging applications, usually a cardboard material is used which is referred to as white cardboard folding box cardboard, also known as GD 1, GD 2, GC1 and GC2 according to DIN 19303, which generally have the following structure: a cardboard with a coated white top layer, a gray, recycled middle layer and a white or wood-containing backing layer.
    The multi-layer structure consists of one or more layers of mechanical pulp between two days of bleached wood cellulose which are coated on the outer layer with clay pigments, preferably kaolinite, containing lakia layer. GC refers to a cardboard material of new fibers, while GD comprises recycled fibers.
    The cardboard with a coated white top layer is usually an "off-machine cast coated" cardboard, which is corroded by a high-gloss chrome-plated cylinder, which can give the cardboard a very high gloss and / or colored finish. Usually cardboard materials are used, at least weike are coated on one side with a ceramic-containing varnish, have a grammage of 160-350 grams per square meter (g / m2), and on which a vacuum-metallized PET film of typically 12 µm thickness is laminated by means of a suitable adhesive.
    The main function of the cardboard in these composite materials is to provide the composite material with the necessary mechanical properties, such as stiffness with a certain flexibility, and the printability, which requires the use of an at least one-side coated cardboard of sufficient thickness.
    A disadvantage of such composite materials from metallized polyester foil and cardboard, despite their multiple uses, is that they are not easily, or even not at all biodegradable, while they are often also not recyclable due to the different nature of the components. Furthermore, the polyester material used is normally based on petrochemical raw materials and is therefore not sustainable in the long term. A further problem resides in that the cardboard used herein must have a sufficient thickness because the mechanical strength of the material is largely determined by the rigidity of the cardboard component, while the polyester film substantially only increases the tensile strength. Furthermore, due to the inherently low surface tension, the PET surface can cause problems during printing.
    Accordingly, there remains the need for a composite material with a flexible cover that is printable, fully biodegradable, and fully recyclable. U32001 / 0010845 describes a material comprising a metallized paper and a coated cellulose material. A description of the metallization of the paper is lacking in this publication, so that it is not clear to the person skilled in the art that the paper has been metallized, for example by lamination with a metal foil.
    The present invention relates to a biodegradable multi-layer laminate for flexible packaging comprising: (a) a cardboard layer, and (b) a non-woven base material comprising cellulose material, further comprising a metal layer with a thickness in the range of 10 to 250 nm, which has been deposited on a first surface, the non-woven base material being laminated on the cardboard layer on a second, non-metallized surface.
    The present invention further relates to a method for preparing a multi-layer cardboard material for folding box packaging, comprising the steps of: i) applying a metal layer by vacuum vapor deposition on a non-woven substrate, and ii) laminating a cardboard substrate with the non-woven substrate on the non-detailed side, and the materials and packages available therefrom.
    The cardboard layer according to the invention preferably has a density in the range of 200-500 g / m2 according to ISO EN536.
    Figure 1 shows the layer structure of a preferred embodiment of the present invention. Herein, a laminate 1 consisting of a cardboard layer 13, an intermediate binding layer 14, a paper layer 12 and a metal layer 11 is shown.
    The present invention provides laminates that are not only biodegradable, but at the same time make it possible to reduce the laminate weight due to the greater inherent stiffness at lower layer thickness of the material according to the invention. The material can furthermore easily be provided with a relief print, and shows a high scratch resistance due to the high surface hardness of the papler layer and / or the top coat. For example, a laminate according to the invention could indicate a stiffness more than 20% higher than a comparable material comprising a cardboard layer and a metallized PET film layer laminated thereon. Furthermore, the materials are easily recyclable; they are preferably at least up to 95%, 96%, 97%, 98%, 99% and more than 99% recyclable, and less than 9%, 8%, 7%, 6%, 5%, 4% of the material is not pulpable, and the rest is also compostable. the material further uses readily available and inexpensive types of cardboard and / or paper, which does not require an advanced bleaching process. Furthermore, use may be made of material comprising more recycled fibers, whereby the ecological footprint of such materials can be improved, as illustrated by the use of thin GK cardboard instead of thicker and heavier GD or GC1 / S or GC 2 / S cardboard material.
    While a GK gray cardboard is ideally suited for simple packaging materials, such as, for example, folding boxes for cosmetic products, the use of a GC1 / S allows both on the metallized side and on the ironed side, provided that it faces the inside of the package , printing Such a double-sided printed material makes it possible to provide additional information, for example for advertising purposes or for additional information about the enclosed product.
    The vein-shaped substrate (b) laminated on a second non-metallized surface is preferably a non-ironed, non-ironed, vein-like, non-woven cellulose-containing material, preferably GK, C1 / S and C2 / S type paper or cardboard . The non-woven material preferably comprises cellulose, particularly preferably paper or cardboard.
    The non-woven sheet-shaped substrate preferably comprises a layer of paper or other cellulose-based material. The layer preferably has a grammage of 20-134 g / m2, in particular 30 to 130 g / m2, 40 to 70 g / m2, 45-65 g / m2, and most preferably 50-55 g / m2 .
    The paper or other cellulose-based material can be unbleached or bleached, and is preferably ironed. It may furthermore comprise one or more lacquer or coating layers, but preferably it is only coated with a kaiinite (clay) lacquer layer which has been applied prior to metallization.
    Typical coated papers include so-called C / 15 and C / 2S paper types, which are used to indicate on which side of a particular document a lacquer layer is applied. C / 1S stands for one-sided coating, C / 2S for two-sided coated cardboard.
    The paper stock is preferably approved for use in packaging for nutrients and food, by an institution such as the FDA, for example. The front side, that is to say the side on the outside of the package, can preferably be printed by a conventional offset, fiexo or deep printing method.
    The metal layer is preferably deposited by a physical deposition process on the non-woven base material prior to lamination.
    The bulk density of paper or cardboard or cardboard is generally indicated as the gram weight, and can generally be calculated by dividing the gram weight by the material thickness (also known as basis weight and caliper, respectively). The latter terms are mostly used in the pulp and paper industry, and serve to indicate the mass of the product per unit area for a type of paper or cardboard. The term "bulk density" is not used in the traditional sense of mass per unit volume, while the term "paper density" is used rather as a measure of surface density. In the pulp and paper industry it is further customary to to set up a commercial paper machine to produce paper of a certain paper density, Paper density can also be used to distinguish paper from cardboard since it usually has a grammage of more than 134 g / m2, while paper has a grammage of 134 g / ma or less has.
    The carton according to the present invention typically has a gram weight in the range of 200-500 g / m2, preferably in the range of 250-400 g / m2, as determined according to ISO EN536 and expressed in grams per square meter.
    The thickness or thickness of the cardboard is preferably in the range of 200 to 600 µm, more preferably in the range of 225-575 µm, as measured according to © EN 20534 and expressed in micrometres. The cardboard layer is preferably an unbleached, cost-efficient cardboard such as GK ("Graukarton" - gray cardboard) unbleached cardboard.
    Such materials are known as GK unlined gray sheet, or calendered GK unlined gray sheet. The total density of the cardboard material according to the invention is preferably in the range of 1.0 to 4.0, as determined according to EN 20534.
    The choice of layer combinations gives flexibility in the manufacture of a laminated material according to the invention, in some cases it may be desirable to reverse the more natural appearance of a brownish colored cardboard, whereby an unbleached paper can also be chosen for the second, outer layer of paper.
    The vacuum deposited metal normally adheres to the surface of the non-woven material. The resulting metal layer thickness is typically in a range of 40 to 3000 Angstroms, and is preferably at least 50, particularly preferably at least 100 Angstroms, but may generally be in the range of 10 to 250 nm.
    The metal layer preferably contains aluminum. Other metals or alloys are used if desired, with aluminum being the most preferred.
    The non-woven material is typically provided with a topcoat prior to printing. The material for metallizing is preferably provided with a lacquer layer, and the metal layer is then provided with a coating layer for printing.
    The coating of the substrate is preferably carried out by means of one or more optionally engraved cylinders, so that the correct amount of drying energy and wetting are applied to a substrate. The machine can use corona treatment to coat the surface energy of the substrate prior to the coating. arrange for.
    The engraved cylinder or cylinders are preferably housed in a closed chamber, preferably in excess pressure, and preferably squeegees are used for applying a lacquer layer. The application can be carried out in a single, double or multiple layers, and is preferably in a single or double layer.
    The laminate structure described above may further comprise one or more additional layers, which may independently comprise a further barrier lacquer layer, and an adhesive or bonding day.
    The non-woven sheet-shaped substrate is preferably laminated to the cardboard layer, preferably by the use of an intermediate bonding or adhesive layer.
    The intermediate adhesive layer may comprise an adhesive layer or adhesive coating, or solvent-containing, water-based, such as, for example, biodegradable adhesive materials, e.g. starch-based adhesives, or solvent-free.
    According to a particularly advantageous and simple embodiment of the laminated material, the intermediate bonding layer comprises a layer of an extrusion-laminated thermoplastic polymer, preferably a thermally melting polyoefine copolymer, for example a co-extrudable polyethylene copolymer, which is preferably also biodegradable.
    The present invention further relates to a method for preparing a multi-layer cardboard material for folding boxes and flexible packages, comprising the steps of: i) applying a metal layer by vacuum deposition on a non-woven substrate and ii) laminating a cardboard substrate on the non-detailed side of the non-woven substrate. Preferably, the non-woven base material is an uncoated, or one-sided or double-sided, sheet-shaped non-woven cellulosic material. It may further comprise fibrous material such as fabric, paper or cardboard. The lamination may be carried out as a reel-to-reel process, or reel-to-sheet (reel-to-sheet) process.
    The printed metalized and optionally preferably topcoated paper is preferably first printed, and then laminated to the cardboard material.
    The non-woven layer is preferably subjected to a high vacuum metal deposition method for coating the exposed side with a thin metal surface layer. in this high vacuum metallization process, the metal is evaporated and deposited on the substrate. Aiuminium is particularly suitable for this invention, but other metals such as silver, tin, zinc, gold, platinum, titanium, gold, lead, nickel and tantai, and alloys thereof, such as chromium titanium can also be used preferably.
    The metal layer can serve a number of functions in addition to the decorative purpose, because a highly-yawning metal surface is created. Applicants have found that the combination according to the invention of a first lacquer layer, followed by a metal layer, can serve as a barrier layer allowing a simple paper material to reach MVTR and OTR values that previously did not seem feasible for coated paper material.
    An additional property of the metal layer comprises reflection of radiation, in particular heat radiation. The products according to the invention are therefore particularly suitable for the manufacture of food and beverage packaging, for example for refrigerated cans or bottles, or food that can be kept warm, for example last food products. Tests performed by the inventors showed that papleriaminate according to the invention could keep the contents of cans under direct solar irradiation up to 5 ° C colder than a comparable, commercially used laminate without metal layer; comparable results were also for keeping food warm, for example, for a roast chicken.
    The present invention therefore also relates to a packaging for beverages, cosmetics or foodstuffs, comprising a laminate according to the invention, which can be printed on one or both sides. The invention further relates to the use of a laminate obtainable according to the invention for storing the temperature of a product packaged in the laminate.
    The metal deposits on the surface of the first layer. The resulting metal coating thickness is typically in a range of 40-3000 Angstroms, preferably at least 50, more preferably at least 100 Angstroms, but can generally be between 10 and 250 nm.
    The resulting metal-covered substrates can be oxidation sensitive, which can lead to adhesion problems in subsequent treatments and applications, for example, causing problems with printing. In addition, the surface is sensitive to scratches or damage.
    In order to convert the metallized substrate obtained in step i) into an easily overprintable substrate, a top coat, often a clear coat, may preferably be applied to the metallized substrate in an optional step iii). Suitable clear coats are disclosed, for example, in US3, 677,792 and WO00 / 77300. Preferably, the metallized substrate can also be subjected to calendering to increase the smoothness before, or after the application of a base coat, or after the metallization step. The preferably highly printable topcoat layer is applied to the surface of the metal layer to improve its printability, and to reduce possible corrosion. The top layer can be a solvent-based lacquer layer, a water-based lacquer layer or otherwise based lacquer layer. The cover layer is chosen such that it preferably does not significantly affect the metal layer, the primer layer or the substrate, whereby, for example, delamination or corrosion of the metal layer can be avoided.
    The application of the coating to a substrate is preferably carried out by means of one or more optionally engraved cylinder (s), so that the correct amount of drying energy and wetting can be applied in the application to the substrate. The machine may also administer a corona treatment to control the surface tension of the substrate prior to coating. The engraved cylinder (s) are preferably housed in a closed chamber, preferably under excess pressure, and preferably squeegees are used for the application. The application can be carried out in a single, double or multiple layers, preferably in a single or double layer.
    The top layer provides the substrate with desired physical characteristics, which result in a final cattle-shaped substrate with the desired properties of good appearance, high gloss, high metal adhesion, satisfactory printability, high stability against rubbing under wet conditions, high dry and wet flexibility, and other factors such as low wet expansion, curl stability, corrosion resistance, excellent ink retention, or quick washability / glueing. Furthermore, the top layer must be printable, that is, allow the use of printing inks by any suitable printing process without the occurrence of compatibility problems or defects, such as legibility problems. The printability of the branch is an important issue when it comes to packaging and labeling In applications such as ink colors, foil printing and thermal transfer printing.
    Clear lacquers which are generally applied to metallized substrates are known for problematic printability due to the inherently low surface tension, and the possible presence of waxes and silicone additives such as flocculants and / or antifoam agents in the formulations. Accordingly, a top layer is preferably used in the present method which is printable, that is, which gives good adhesion to inks without surface defects at pressure and then curing on the top layer, and which is preferably without surface defects.
    The top layer dry normally has a thickness of between 10 µm and 0.5 µm, preferably less than 5 µm, more preferably less than 4 µm and most preferably less than 3 µm. The top layer preferably has a dry thickness of at least 0.5 µm, more preferably at least 0.6 µm and most preferably at least 0.7 µm. The cover layer is usually applied to a solids content of between 6 and 0.5 g / m, preferably between 3 and 0.6 g / m, particularly preferably between 2 and 0.85 g / m. The process further comprises printing on the metal layer or the topcoat, either after lamination or before; whereby this is generally used to print brand and product names, as well as technical specifications, on the packaging.
    The method further preferably comprises cutting, embossing and / or perforating the thus-obtained vein-shaped structure. The cut pieces thus obtained can be folded to obtain one or more folded packaging boxes. The present invention also relates to the use of a substrate or package according to the invention for the preparation of folding boxes. The term "folding boxes" herein refers to any form of packaging that can be folded from a vein-shaped structure, for example rectangular boxes, such as medication or body care products and / or banderoles such as for food and vial packaging.
    Those skilled in the art will appreciate that the invention described herein is susceptible to variations and other modifications not specifically described. It will be understood that the invention includes all such variations and modifications. The invention also encompasses all of the steps, characteristics, compositions and compounds referred to or those in this description, individually or collectively, and any and all combinations of any two or more of said steps or characteristics. The following examples illustrate the invention:
    Example 1: folding cardboard for cosmetic tubes A laminate was produced from 270 g / m2 GK cardboard and 53 g / m2 paper metallized with aluminum, coated with a top layer, a laminated medium, and a water-based acrylic adhesive with a desiccant content of 2 to 3 grams / i .
    Stiffness: The laminate material indicated a 21% higher stiffness than the standard material for this application, namely a laminate comprising a GD board of 315 g / m2 with a metallized PET film of 8 µm thickness and a density of 11 g / m2, and a solvent-based adhesive.
    Recyclability: the same materials were subjected to a recyclability test. The laminate according to the invention resulted in a contamination in the recycled pulp of less than 3%. Furthermore, the contaminated material could also be treated in such a way that it could be used for recycled cardboard.
    In contrast, the standard film material resulted in a contamination of 9% which could only be related or dumped by the presence of aluminum and PET material.
    The inventors have further established that with a laminate according to the invention not only the cost of the material can be lowered, but also that the efficiency in production lines for such laminates can be increased. Compared to metallized PET laminates because the mineralization can proceed more rapidly by better coil tension, that the curing time of the glue can be shortened, which can lead to an energy and time saving, and that a reduction of waste can be achieved during the process.
    权利要求:
    Claims (20)
    [1]
    Conclusions
    A biodegradable multilayer laminate for flexible product packaging, comprising: (a) a cardboard layer, and (b) a non-woven layer of base material comprising ceiling material, and furthermore provided with a metal layer having a thickness located in the range of 10-250 nm and which is deposited on a first surface, wherein the non-woven layer of base material on the cardboard layer is laminated on a second, non-detailed surface, and wherein the metal layer is deposited by using a physical vapor deposition method.
    [2]
    The laminate according to claim 1, wherein the cardboard layer has a specific density that is in the range of 200-500 g / m2 in accordance with ISO EN536.
    [3]
    The laminate of claim 1 or claim 2, wherein the metal layer comprises aluminum and alloys thereof.
    [4]
    The laminate according to any of the preceding claims, wherein the metal layer was deposited on the non-woven base material by using a physical vapor deposition method prior to lamination and / or printing.
    [5]
    A laminate according to any one of the preceding claims, wherein the non-woven material is a one-side coated, sheet-shaped, non-woven ceiling material, or a two-sided, sheet-shaped, non-woven ceiling material.
    [6]
    A laminate according to claim 5, further comprising a printable topcoat layer on the metal layer.
    [7]
    Laminate according to one of the preceding claims, wherein the non-woven layer of base material has a specific density of 20-90 g / m2, preferably 45-80 g / m2.
    [8]
    A laminate according to any one of the preceding claims, wherein the metallized layer of base material is laminated to the cardboard layer by making use of an intermediate heat layer.
    [9]
    The laminate of claim 8, wherein the intermediate adhesive layer comprises a thermal adhesive or water-based adhesive.
    [10]
    A method for preparing a multi-layer cardboard material for a packaging folding box according to any one of claims 1-8, comprising the steps of: i. applying a metal layer to a non-woven sheet material by using a vacuum vapor deposition; and 11. laminating a cardboard substrate to the non-woven material on the non-metallized surface.
    [11]
    11. A method according to claim 10, wherein the non-woven material is a sheet-coated, non-woven cellulose material coated on one side. or is a two-sided, vein-shaped, non-woven cellulosic material.
    [12]
    The method of claim 11, wherein the non-woven material contains fibrous material such as fabric, paper, or cardboard.
    [13]
    The method of any one of claims 10-12, wherein the metal comprises aluminum, alloys, and / or combinations thereof.
    [14]
    The method of any one of claims 10-13, further comprising applying a topcoat layer to the metallized side of the non-woven material as obtained in step t).
    [15]
    The method of any one of claims 10-14, further comprising printing the topcoat layer of the sizing as obtained from step i, or the laminate obtained from step ii), and optionally, printing the bottom.
    [16]
    A method according to any one of claims 10-15, wherein the lamination in step ii) is carried out as a spit-to-spit process, or spit-to-spill process. A method according to any of claims 10-16, wherein the lamination in step ii) makes use of solvent-containing, solvent-free, or water-based glue.
    [18]
    The method of claim 17, wherein the laminated material comprises a layer of an extrusion-laminated thermoplastic polymer.
    [19]
    The method of claim 18, wherein the laminated material comprises a layer of a co-extrudable polyolefin.
    [20]
    20. Packaging for drinks, cosmetics or foodstuffs, comprising a laminate according to any one of claims 1-9.
    [21]
    Use of a laminate obtainable according to one of claims 1 to 19 for storing the temperature of a product packaged in the laminate.
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    同族专利:
    公开号 | 公开日
    NL2008872C2|2013-11-26|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CA781436A|1968-03-26|S. Riedinger Walter|Production of paperboard laminates|
    US3297515A|1965-08-27|1967-01-10|Velsicol Chemical Corp|Laminated products and a process for the production thereof|
    US3972467A|1974-08-06|1976-08-03|International Paper Company|Paper-board laminate|
    CA1160552A|1980-04-25|1984-01-17|Helmut Schmoock|Method for producing a laminate combination|
    US4473422A|1981-03-11|1984-09-25|Transfer Print Foils, Inc.|Metalized paper or board product and method of preparation|
    JPS59222873A|1983-06-01|1984-12-14|Honshu Paper Co Ltd|Metalized paper for label|
    US20010010845A1|1995-12-28|2001-08-02|Hoffman Roger P.|Laminated package having metalized paper|
    EP1201822A1|2000-10-23|2002-05-02|Westvaco Corporation|Printable paperboard for packaging|
    法律状态:
    2022-02-09| MM| Lapsed because of non-payment of the annual fee|Effective date: 20210531 |
    优先权:
    申请号 | 申请日 | 专利标题
    NL2008872A|NL2008872C2|2012-05-24|2012-05-24|Biodegradable composite paper materials.|
    NL2008872|2012-05-24|
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