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  • 专利说明
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    • 专利摘要:
    COATED POLYMERIC SUBSTRATE, LAMINATED STRUCTURE, AND METHOD FOR FORMING A LAMINATED STRUCTURE. A laminated structure is provided that includes a first polymeric substrate laminated to a second polymeric substrate. A base coat comprising the reaction product of polyethyleneimine and formaldehyde is included on the surface of the first polymeric substrate which is printed in sequence with an image of toner or ink prior to lamination to the second polymeric substrate. The base coat provides good adhesion of ink and / or toner to the polymeric substrate. The base coat also provides improved bond strength by laminating the first and second polymeric substrates as well as providing water resistance for the laminated structure.
    公开号:BR112015013734B1
    申请号:R112015013734-2
    申请日:2014-06-12
    公开日:2021-03-09
    发明作者:Baptiste Regnier
    申请人:Michelman, Inc.；
    IPC主号:
    专利说明:

    CROSS REFERENCE WITH RELATED REQUESTS
    [001] This application claims the benefit of US Provisional Application No. 61 / 836,414, filed on June 18, 2013 entitled LAMINATE STRUCTURE, and US Serial No. 14 / 302,819 filed on June 12, 2014 entitled LAMINATE STRUCTURE INCLUDING A PRIMER COATING THERE. All contents of which said requests are incorporated herein by reference. BACKGROUND OF THE INVENTION
    [002] Modalities of the invention refer to a laminated structure for use in a variety of packaging applications, and more particularly, to a laminated structure in which a base coating composition is applied to a first polymeric substrate that is printed in sequence with a liquid ink or toner and then laminated to a second polymeric substrate.
    [003] Polymeric films such as biaxially oriented polypropylene, biaxial oriented polyethylene terephthalate, or polyester films have been widely used in packaging materials for food, liquids, and personal hygiene articles. For such packaging applications, a first polymeric film is generally laminated to another polymeric film that can be the same or different from the first polymeric film.
    [004] Such films are usually printed using high-speed digital printing machines using toners or liquid or dry inks in electrophotography systems. In such systems, toner images are formed in a photosensitive drum and then transferred electrically to a belt or intermediate transfer mold to print on a continuous sheet or sheet of polymeric film. Printers using such toners or inks are commercially available from Hewlett-Packard Company under the HP Indigo trade name. However, since liquid toners do not always transfer well and / or adhere well to polymeric film substrates that are printed using such presses, the substrates are typically coated with a base coat to enhance the adhesion of liquid toners to it.
    [005] A number of base coatings have been developed for use on polymeric film substrates that make the film surface more receptive to toners and inks. Typical base coatings currently in use were developed based on ethylene - acrylic acid copolymers. Such a base coat is described in U.S. Patent commonly designated No. 7,470,736.
    [006] However, the development of higher high-speed digital presses presented new challenges for the use of base coatings with respect to liquid toner and / or ink transfer and adhesion to polymer substrates. For example, the most recently developed HP Indigo 6000 series digital presses generally offer digital printing at about twice the speed of previous Indigo presses. In addition, the HP 20000 digital press is capable of printing a 30 inch (76.2 cm) long film and the HP 30000 digital press is capable of printing 29.5 inches (75.0 cm) in width on one variety of substrate types.
    [007] Due to the specifications for liquid toners used in such presses, conventional base coatings do not provide sufficient toner adhesion to the underlying polymeric substrate. As a result, substrates coated with conventional base coatings can undergo undesirable toner transfer and adhesion to the substrate as well as resulting in unacceptably low lamination bond strength when the printed film is laminated to another substrate.
    [008] Appropriately, there is a need in the art for a base coat that provides good ink and / or toner adhesion to polymeric substrates and that provides improved bond strength when used between printed and laminated polymeric substrates. SUMMARY OF THE INVENTION
    [009] Modalities of the invention satisfy these needs by providing a laminated structure comprising first and second laminated polymeric substrates in which a base coat is applied to one or both of the polymeric substrates to provide enhanced ink and / or toner adhesion of images printed on it. In addition, the base coat provides improved bond strength by laminating the first printed polymeric substrate to the second polymeric substrate. In addition, the laminated structure exhibits improved resistance to water infiltration by exposure to water immersion.
    [0010] According to one aspect of the invention, a laminated structure is provided comprising first and second polymeric substrates each having first and second main surfaces, where at least one main surface of the first polymeric substrate includes a base coating thereon comprising the product reaction of polyethyleneimine and formaldehyde. An ink or toner image is printed on the substrate on the base coating, and the first substrate is laminated to the second polymeric substrate on the surface including the base coating composition and the ink or toner image. In one embodiment, the laminated structure includes a laminating adhesive over the ink or toner image to facilitate the lamination of the substrates.
    [0011] According to another embodiment of the invention, a method for forming a laminated structure is provided which comprises providing first and second polymeric substrates each having first and second main surfaces, and applying a base coating to a main surface of the first polymeric substrate , where the base coat comprises an aqueous solution of the reaction product of polyethyleneimine and formaldehyde. The method may additionally include drying the coating. The method further includes printing an ink or toner image on the substrate on the base coating, and laminating the second polymeric substrate to the surface of the first polymeric substrate containing the base coating and the image thereon.
    [0012] Optionally, before applying the base coat, the surface of the polymeric substrate can be exposed to a corona discharge treatment.
    [0013] The method may additionally include applying a lamination adhesive to the surface of the first polymeric substrate containing the base coat and the image thereon before laminating the first and second polymeric substrates. The laminating adhesive can be solvent-free, solvent-based, or water-based.
    [0014] The first and second polymeric substrates comprise materials selected from biaxially oriented polyethylene terephthalate (BOPET), polyethylene, biaxially oriented polypropylene (BOPP), coextruded polypropylene (COPP), cast polypropylene (CPP), oriented nylon biaxially (BON), and biaxially oriented polyamide (BOPA). Such substrates can also include a metallized coating on it. The first polymeric substrate can be the same as the second polymeric substrate, or the first and second substrates can be different. The first or second polymeric substrates can also comprise single or multiple layer films.
    [0015] In one embodiment, the base coat is in aqueous form and comprises from about 5 to about 20% by weight of polyethyleneimine, about 0.05 to about 5.0% by weight of formaldehyde, and the equilibrium water. The base coating composition preferably has a solids content ranging from about 5 to 10% by weight of the total composition. In one embodiment, the base coat additionally comprises from about 0.05 to 0.1% by weight of a wetting agent. In another embodiment, the base coat additionally comprises from about 0.05 to 0.2% of the antifoam additives.
    [0016] Appropriately, it is a feature of the modalities of the invention to provide a laminated structure comprising first and second polymeric laminated substrates, where a base coat has been applied to the first polymeric substrate, an ink or toner image is printed on it, and the first substrate is laminated to a second polymeric substrate. The base coating composition provides enhanced toner and / or ink adhesion to the first polymeric substrate, and exhibits good bond strength by laminating the first printed polymeric substrate to a second substrate. Other features and advantages of the invention will be apparent from the following description and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
    [0017] Fig. 1 is a schematic illustration of a laminated structure formed according to an embodiment of the invention.
    [0018] Fig. 2 is a graph illustrating the bond strength of the laminated structures of BOPET / PE formed according to an embodiment of the invention.
    [0019] Fig. 3 is a graph illustrating the bond strength of the laminated structures of BOPET / PE formed according to another embodiment of the invention.
    [0020] Fig. 4 is a graph illustrating the bond strength of the laminated structures of BOPET / PE formed according to another embodiment of the invention.
    [0021] Fig. 5 is a graph illustrating the bond strength of laminated BOPP / BOPP structures formed according to another embodiment of the invention.
    [0022] Fig. 6 is a graph illustrating the bond strength of the laminated structures of BOPET / Al-PE formed according to another embodiment of the invention.
    [0023] And Fig. 7 is a graph showing the bond strength of the laminated structures of metallized BOPP / BOPP formed according to another embodiment of the invention. DETAILED DESCRIPTION
    [0024] Modalities of the laminated structure comprising first and second polymeric substrates including a base coating on it as described here provide improved toner and / or ink adhesion to the polymeric substrates. While the invention has been described here with respect to laminated structures, it should be realized that the base coating can also be applied to polymeric substrates that are printed in sequence, but not laminated to take advantage of the enhanced toner / ink adhesion properties provided by the base coat.
    [0025] The base coating improves ink or toner adhesion for a variety of printing methods and equipment, but especially improves ink or toner adhesion to polymeric substrates that are printed using high-speed digital presses such as digital presses. HP Indigo WS 6000 series or the HP 20000 or 30000 wide format digital presses. For "high xgnqekfcfg". a press having a linear speed of up to about 30 meters / min. by a four-color mode, and about 60 meters / min. by a two-color mode. By "wide hqtocvo" "is meant that the printers print in a width of 29 to 30 inches (73 to 76 cm). For example, the base coat used on the polymeric substrates comprising the laminated structure can be applied to the substrates that are printed using liquid toners and / or inks suitable for HP Indigo Digital Presses WS6600 or WS6000, 20000 or 30000. These presses are designed to print substrates used for flexible packaging.These digital presses also include an optimal in-line initiation unit that applies the base coat to uncoated substrates in line (following a crown treatment) and the base coat dries just before printing, so the presses are able to print start and print substrates in a single pass. Alternatively, the base coat can be applied to a offline substrate by conventional rod coating, engraving or flexographic techniques.
    [0026] Unexpectedly it was discovered that the bond strength by laminating a first polymeric substrate initiated and printed onto a second substrate is improved even if the base coating is not present on the surface of the bond, that is, the coated surface of the coating base is printed in excess with ink or toner and then optionally coated with a laminating adhesive. While it is not desired to be bound in theory, it is believed that the increased bond strength is obtained as a result of a reaction that occurs between the components in the paint and the base coat. The components of the paint are believed to react with the components of the base coat by an acid-base reaction, where the base function is provided from the amine groups present in the polyethyleneimine chain, and the acid function is provided from the ink ( such as HP Indigo inks that are used in the presses described here).
    [0027] It was also discovered that the use of the base coat as described here provides a laminate having improved resistance to the infiltration of water heated by immersion of the laminate. For example, when laminates are used in twisted packaging applications, the final package can be subjected to immersion in hot water to heat the contents of the package.
    [0028] Unless otherwise indicated, the disclosure of any ranges in the specification and claims must be understood to include the range itself and anything else assumed here, as well as full stops.
    [0029] A modality of the base coating for use on polymeric substrates forming the laminated structure comprises from about 5 to 20% by weight of polyethyleneimine, from about 0.5 to 5.0% formaldehyde, and the deionized equilibrium water. Polyethyleneimine is preferably supplied in the form of an aqueous solution containing about 50% by weight of the polyethyleneimine, but can comprise from 20 to 99% by weight.
    [0030] A polyethyleneimine solution suitable for use in the base coating composition is commercially available from BASF under the designation Polymin® P or Lupasol® P. Other suitable grades of Polymin® polyethyleneimines include Polymin® FG, WF, G20 , G35, G100, HF, PS, SK and SNA. Other polyethyleneimines are available from Nippon Shokubai under the name EPOMIN and include EPOMIN SP-003, SP-006, SP-012, SP-018, SP-200, SP-110, SP-1000, P-1000, P- 1010, and P1050.
    [0031] Polyethyleneimine acts as an adhesion promoter to achieve good adhesion of toner and / or ink image to the polymeric substrate. Polyethyleneimine is modified with formaldehyde in water, that is, formaldehyde acts to crosslink the polyethyleneimine chains through an aldehyde-ammonia reaction to form a resin that, through drying, forms a film on the substrates that are coated. It should be noted that there are no other components present in the base coating composition that can react with polyethyleneimine other than formaldehyde.
    [0032] The modified polyethyleneimine makes the base coat more water resistant, and consequently, the final laminated structure is water resistant, for example, when subjected to immersion in hot water.
    [0033] The base coat can additionally comprise from 0.05 to about 0.1% by weight of a wetting agent, and defoaming additives in an amount from from 0.05 to 0.2% by weight.
    [0034] The base coat is preferably prepared by adding polyethyleneimine and formaldehyde to water in a mixing vessel at room temperatures. The polyethyleneimine and formaldehyde components react to form a polymer which is known under the name aziridine, formaldehyde resin (CAS No. 25549-69-3). When the solution of this polymer in water is applied to the surface of a substrate, the water evaporates on drying to form a film.
    [0035] The base coating can be applied to polymeric substrates including polyethylene, biaxially oriented polyethylene terephthalate (BOPET), fused polypropylene (CPP), biaxial oriented polypropylene (BOPP), coextruded polypropylene (COPP), nylon oriented biaxial (BON), biaxially oriented polyamide (BOPA), and any of the above polymers including a metallized coating on it. Polymeric substrates can vary in thickness from about 10 to about 50 μm. The base coat is applied to at least one main surface of the substrate which is to receive the toner / ink. Before the base coat is applied, the surface of the substrate is preferably treated to ensure that the base coat wet the surface of the film. The film is preferably treated using conventional techniques such as a flame or crown discharge treatment.
    [0036] The base coat is preferably applied as an aqueous solution to at least one main surface of the substrate to form a substantially continuous coating on the surface of the substrate followed by drying of the coating. The base coat can be applied both online and offline. For example, the base coat can be applied in-line to a press that is fitted with an in-line initiation unit. Alternatively, the base coat can be applied in an offline process using any of a number of known techniques, including engraving or stem coating or graphic printing. The base coating composition is preferably applied to the substrate such that when dry, it forms a substantially continuous film coating having a coating weight of about 0.15 to 0.3 g / m2 (resulting in a thickness of from about 0.15 to 0.2 μm).
    [0037] After the base coat is applied, it can be dried to a substantially continuous adherent film, cleared by hot air, radiant heat or any other suitable medium.
    [0038] After the base coat is dried, the base coat coated polymer substrate can then be printed using a digital press as described above using liquid or dry ink or toner. Printed images may take the form of graphic images, words, symbols, or any combination thereof and may cover substantially the entire surface of the substrate or be limited to one or more desired areas thereof.
    [0039] The initiated or printed polymeric substrate is then laminated to a second polymeric substrate. The second substrate can comprise any of the above substrates and can also include multilayered substrates such as aluminum-polyethylene. A lamination adhesive can be applied to the first substrate surface (initiated and printed) or to the second polymeric substrate surface before lamination. In some embodiments, the second substrate can be treated in a crown before applying the laminating adhesive.
    [0040] The lamination adhesive can be applied, for example, using a lamination machine of the type without solvent. The adhesive can be applied at a coating weight of from about 1.8 g / m2 to about 2.2 g / m2, and preferably about 2.0 g / m2. Lamination adhesives for use are solvent-free adhesives commercially available from Morchem, Sun Chemical, Henkel, Rohm and Haas, or Bostik. While solvent-free adhesives are preferred for use, it is also possible to use solvent-based adhesives or water-based adhesives. Where solvent based adhesives are used, the adhesive is preferably applied at a coating weight of about 2.0 to 2.5 g / m2. Where water based adhesives are used, the adhesive is preferably applied at a coating weight of from 1.5 to 2.0 g / m2.
    [0041] Preferred laminated structures formed in accordance with embodiments of the invention include a biaxial oriented polyethylene terephthalate substrate (BOPET) initiated / printed laminated to a polyethylene substrate, and a biaxial oriented polypropylene initiated / printed laminated to a (second) ) biaxially oriented polypropylene substrate.
    [0042] Other possible laminated structures include a BOPET film initiated / printed laminated to polyethylene or fused polypropylene, or a biaxial oriented polyamide film (BOPA) initiated / printed laminated to polyethylene or fused polypropylene. An initiated / printed BOPP film can be laminated to polyethylene, a second BOPP film, or a metallized BOPET film.
    [0043] Other possible multilayer laminated structures include a BOPET film initiated / printed laminated to a multilayer film comprising BOPET and fused polyethylene or polypropylene, or a BOPET film initiated / printed laminated to a multilayer film comprising BOPET metallized and fused polyethylene or polypropylene, or an initiated / printed BOPET film laminated to a multilayer substrate comprising aluminum foil and fused polyethylene or polypropylene. In all of the laminates above, BOPA-initiated / printed films can be used in place of BOPET.
    [0044] Referring now to Fig. 1, a laminated structure 10 according to an embodiment of the invention is shown chemically and includes a first polymeric substrate 12 which is coated with a base coating 14 on a main surface of the substrate. Liquid ink / toner 16 is printed on the base coat 14 and dried. A laminating adhesive 18 is provided on the printed substrate, and a second polymeric substrate 20 is adhered to the laminating adhesive. As will be perceived, additional polymeric and / or metallic layers can also be present in the global laminated structure.
    [0045] Laminated structures initiated or printed can be used in a number of packaging applications including vertical bags, flat bottom bags, and blister and carton packs.
    [0046] So that the invention can be more readily understood, reference is made to the following example, which is intended to illustrate the invention, but is not taken as limiting its scope. Example 1
    [0047] The following base coat compositions were prepared by combining the following components at room temperature: Table 1

    [0048] Base coat A had a solids content of 5% and Base coat B had a solids content of 10% (based on the total weight of the base coat composition). Both compositions had a pH between about 10 and 12.
    [0049] The base coatings have been applied to various film substrates (following a crown treatment) including biaxially oriented polyethylene terephthalate films, polyethylene, and biaxially oriented polypropylene. Selected initiated substrates were printed with an HP Indigo WS6600 and HP 20000 press using an approved liquid toner composition with a specific image consisting of a series of 24 packs having different cuts and toner coverage ranging from 100% to 350%, where the toner coverage is specified as a percentage using 100% of each process color (cyan, magenta, yellow, black and white). The total coverage depends on a number of parameters including the printing process, type of substrate, the speed of the press, and how many colors are printed simultaneously.
    [0050] Laminate constructions were then formed by adhering the initiated and printed substrates to a second polymeric film substrate comprising either polyethylene (PE), biaxially oriented polypropylene (BOPP), or a multilayer substrate comprising aluminum / polyethylene. The resulting laminated structures comprise BOPET / PE, BOPP / BOPP, and BOPET / Al-PE, where the PET film had a thickness of 12 μm, the BOPP film had a thickness of 20 μm, the PE film had a thickness 90 μm, and the Al-PE film had a thickness of 8 μm (aluminum) and 90 μm (PE). A metalized BOPP / BOPP structure was also formed having a thickness of 30 μm.
    [0051] The substrates were bonded using solvent-free or solvent-based laminating adhesives as described below. Before applying the laminating adhesive, the second polymeric substrates were treated by crown. The laminating adhesives were then applied using a Nordmeccanica labo combi 400 laminating machine.
    [0052] The lamination was also performed using a Nordmeccanica Labo Combi 400 lamination machine. The lamination bond strength of the laminated structures was then determined using the procedure described in ASTM F88. This is a peeling test that determines the “seal resistance” of the packaging, which is defined as the measure of a packaging seal's ability to resist separation. The test indicates the integrity of the packaging as well as the ability of the laminating process to produce consistent seals. A test technique was used in which a tail of each specimen was attached to opposite handles and the seal was supported by hand at a 90 ° perpendicular angle to the back while the test was conducted. One-inch-wide strips were used for measurements. After starting the determination between the relevant film sheets, the average force required to peel the two “legs” of the test pieces was recorded.
    [0053] Table 2 below illustrates the failure modes observed in the peeling of the substrates. Table 2

    [0054] Fig. 2 illustrates the failure mode and lamination bond strength for a biaxially oriented polyethylene terephthalate / polyethylene (BOPET / PE) laminate in which BOPET was coated with the Base Coat B, printed, and adhered to the PE substrate with a solvent-free adhesive (PL 272A / CF72 from Morchem). The base coat was applied at coat weights of 0.13, 0.17, and 0.23 gsm. As can be seen, for substrates having 100 to 200% ink coverage, the lamination bond strength is greater than 3.5 N / inch.
    [0055] Fig. 3 illustrates the failure and resistance modes of lamination bonding for a biaxial-oriented polyethylene terephthalate / polyethylene laminate (BOPET / PE) in which the BOPET film was coated with the Base Coat B, printed (350% ink coverage) and adhered to the PE film with a solvent-free adhesive (DICDRY NS 2100A / HA 210B from DIC Corporation). This adhesive is preferably prepared at a ratio of 100/140 to A / B components in order to obtain optimum lamination bond strength values. The base coat was applied to the coating weights of 0.1, 0.18, 0.23, and 0.3 gsm. As can be seen, at the highest coating weights, the lamination bond strength remains high 80 days after lamination.
    [0056] Fig. 4 illustrates the failure and resistance modes of lamination bonding for a biaxial-oriented polyethylene terephthalate / polyethylene laminate (BOPET / PE) in which the PET film was coated with the Base Coat B, printed , and adhered to the PE film with a solvent based adhesive (PS 246A / CS90 from Morchem). The base coating was printed on coating weights of 0.13 gsm, 0.17 gsm, and 0.23 gsm and the bond strength was measured seven days after lamination.
    [0057] Fig. 5 illustrates the failure and resistance modes of lamination bonding for a biaxially oriented polypropylene / biaxial oriented polypropylene (BOPP / BOPP) laminate in which the first BOPP film was coated with the Coating base B, printed (350% ink coverage), and adhered to the second BOPP film with a solvent-free adhesive (PL 272A / CF72 from Morchem). The base coat was printed at a coating weight of 0.18 gsm.
    [0058] Fig. 6 illustrates the failure and resistance modes of lamination bonding for a biaxially oriented polyethylene terephthalate / aluminum - polyethylene laminate (BOPET / Al-PE) in which the BOPET film was coated with the Coating base B, printed (350% ink coverage), and adhered to the Al-PE film with a solvent-free adhesive (DICDRY NS 2100A / HA 210B from DIC Corporation). The base coat was printed at a coating weight of 0.18 gsm.
    [0059] Fig. 7 illustrates the failure and resistance modes of lamination bonding for a biaxially oriented polypropylene / biaxial oriented metallized polypropylene (BOPP / met-BOPP) in which the BOPP film was coated with the Coating base B, printed (350% ink coverage), and adhered to the metallized BOPP film with a solvent-free adhesive (DICDRY NS 2100A / HA 210B from DIC Corporation). Example 2
    The base coating compositions of Example 1 and a separate coating of pure polyethyleneimine were applied to a first polymeric substrate (BOPET or BOPP) and then laminated to a second polymeric substrate (polyethylene) without the application of a laminating adhesive. The substrates were laminated at a heat seal temperature of 135 ° C using metal jaws heated to a pressure of 40 PSI for 1.5 seconds.
    [0061] The laminates formed were then subjected to a peeling test in accordance with ASTM F88 with and without being subjected to immersion in water and alcohol at room temperature. The results are shown below in Tables 3 to 6. Table 3 BOPET / PE laminate (base coating weight 0.2 g / m2) Bond strength (N / inch)
    Table 4 BOPET / PE laminate (base coat weight 0.05 g / m2) Bond strength (N / inch)
    Table 5 BOPP / PE laminate (base coating weight 0.2 g / m2) Binding residency (N / inch)
    Table 5 BOPP / PE laminate (base coat weight 0.05 g / m2) Binding residency (N / inch)

    [0062] As can be seen, laminates including the base coating compositions of the invention exhibit higher bond strength after immersion than substrates / laminates that have been treated with PEI alone.
    [0063] Having described the invention in detail and with reference to its preferred embodiments, it will be apparent that modifications and variations are possible without departing from the scope of the invention.
    权利要求:
    Claims (12)
    [0001]
    1. Coated polymeric substrate having first and second main surfaces, characterized by the fact that at least one main surface of said polymeric substrate includes a base coating therein comprising a cross-linked polyethyleneimine which is a reaction product of polyethyleneimine and formaldehyde, and an image of ink or toner printed on said substrate on said base coat.
    [0002]
    2. Laminated structure, characterized by the fact that the coated polymeric substrate as defined in claim 1 is laminated to a second polymeric substrate on the surface of the polymeric substrate that includes the base coating composition and the ink or toner image.
    [0003]
    3. Laminated structure according to claim 2, characterized by the fact that it includes a laminating adhesive on the ink or toner image.
    [0004]
    4. Laminated structure according to claim 2, characterized by the fact that the coated polymeric substrate and the second polymeric substrate are selected from biaxially oriented polyethylene, polyethylene terephthalate (BOPET), biaxially oriented polypropylene (BOPP), fused polypropylene (CPP), coextruded polypropylene (COPP), biaxially oriented nylon (BON), and biaxial oriented polyamide (BOPA).
    [0005]
    Laminated structure according to claim 4, characterized by the fact that the coated substrate comprises BOPET or BOPA and the second polymeric substrate comprises polyethylene or fused polypropylene.
    [0006]
    6. Laminated structure according to claim 4, characterized by the fact that the polymeric substrate comprises BOPP and the second polymeric substrate comprises polyethylene, BOPP, or a metallized BOPET film.
    [0007]
    7. Laminated structure according to claim 4, characterized in that the coated polymeric substrate comprises BOPET and the second polymeric substrate is a multilayer film comprising one or more of BOPET, metallized BOPET, or aluminum, polyethylene and fused polypropylene.
    [0008]
    8. Method for forming a coated polymeric substrate, characterized by the fact that it comprises: providing a polymeric substrate having first and second main surfaces; applying a base coat to at least one main surface of said polymeric substrate to form a coated polymeric substrate, said base coat comprising an aqueous solution of a cross-linked polyethyleneimine which is a reaction product of polyethyleneimine and formaldehyde; drying said base coat; and printing an ink or toner image on the polymeric substrate on said base coat.
    [0009]
    Method according to claim 8, characterized in that it includes the step of laminating the second polymeric substrate to the surface of the coated polymeric substrate containing said base coat and the image thereon.
    [0010]
    Method according to claim 9, characterized in that it includes applying a laminating adhesive to the surface of the coated polymeric substrate containing the base coating and the image thereon before laminating the coated polymeric substrate and the second polymeric substrate.
    [0011]
    Method according to claim 10, characterized in that it includes crown treatment of said surface of the polymeric substrate before applying the base coating.
    [0012]
    12. Method according to claim 9, characterized in that the coated polymeric substrate and the second polymeric substrate are selected from biaxially oriented polyethylene, polyethylene terephthalate (BOPET), biaxially oriented polypropylene (BOPP), fused polypropylene (CPP), coextruded polypropylene (COPP), biaxially oriented nylon (BON), and biaxial oriented polyamide (BOPA).
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    法律状态:
    2018-02-27| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2020-02-04| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-02-23| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-03-09| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 12/06/2014, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
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    US201361836414P| true| 2013-06-18|2013-06-18|
    US61/836,414|2013-06-18|
    PCT/US2014/042093|WO2014204773A2|2013-06-18|2014-06-12|Laminate structure including a primer coating therein|
    US14/302,819|2014-06-12|
    US14/302,819|US9884470B2|2013-06-18|2014-06-12|Laminate structure including a primer coating therein|
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