CN101027373A - Labels and labeling process - Google Patents

Abstract

This invention relates to labels, particularly polymeric labels and to a process for printing such polymeric labels. The printed labels are useful for application to food containers, including glass and polymeric containers.

Description

Label and labeling method

[0001] the application require to submit on September 23rd, 2004, sequence number is the rights and interests of (U.S.) provisional application of 60/612,331, incorporates its full content into this paper as a reference at this.

Technical field

[0002] the present invention relates to label, and more specifically, relate to the polymeric film labels that is used on the food product containers, and a kind of method of printed polymeric film label.

Background technology

[0003] label being attached on food product containers that glass or polymkeric substance make or the jar is general custom.This container and jar have many kinds of shapes and size, to hold dissimilar food items etc.Label provides the information about the nutritive value of the contents of container and other such as container supplier and contents etc.

[0004] because paper labels can provide most of unrestricted fine arts and/or figure potential, so paper labels generally is used on the food product containers.Yet paper labels can not be resisted tag damage, particularly the damage that produces in high speed food container filling and transport operation.

[0005] polymeric labels provides the enhanced wearability, but spends higher.In addition, because the print surface of some polymeric films is not accepted printing ink relatively, the high definition printing is normally impossible.

[0006] many polymeric labels that will be used for food product containers from the negative are printed on the downside of transparent polymeric facestock (facestock), then tackiness agent are coated onto on the printed layers.To container the time, printed layers is between polymeric labels and vessel surface with tag application.Alternatively, transparent or chromatic polymeric labels is printed on its upper surface, compresses transparent second layer polymeric film.Printed layers then is clipped between the two layers of polymers film.

[0007] uses intaglio printing usually, high definition figure and pattern are printed onto on the polymeric film.In intaglio printing, gravure printing ink deposits in the lip-deep image wells of gravure cylinder, and sedimentary then ink image is sent on the label plane materiel.Because intaglio printing is generally being carried out at a high speed, gravure printing ink generally comprises volatile organic solvent, and this solvent can dissolve the printing ink adhesive component, and in drying process, gravure printing ink must be removed fast.

[0008] in order to make gravure printing ink on polymeric film facestock, generally at first with bi-oriented polypropylene (BOPP), priming paint or external coating (EC) are coated onto on the polymeric facestock surface.Prime coat is adhered on the polymeric film gravure printing ink better.Yet the prime coat of adding has increased the time of manufacturing cost and label application process.

[0009] correspondingly, expectation can be produced label with the cost that reduces, and particularly produces the polymeric film labels that have the high quality printing layer and can stand the wearing quality of manufacturing processed needs.

Summary of the invention

[0010] on the one hand, the present invention relates to have on it food product containers of label, comprise that (a) has the polymeric facestock of upper surface and lower surface; (b) pressure sensitive adhesive layer that contacts with the described lower surface of described plane materiel; (c) be printed on the solvent type ink layer of the described upper surface of described plane materiel; (d) be superimposed upon overprint varnishes layer on the described ink lay.

[0011] in one embodiment, described label comprises that (a) has the unprimed polyolefine plane materiel of upper surface and lower surface; (b) pressure sensitive adhesive layer that contacts with the described lower surface of described plane materiel; (c) be printed on the solvent type ink layer gravure of the described lower surface of described plane materiel; (d) be superimposed upon overprint varnishes layer on the described ink lay.

[0012] on the other hand, the present invention relates to be used for making the method for intaglio printing label, comprise that (a) provides a kind of have upper surface and the unprimed polyolefine plane materiel of lower surface; (b) the described upper surface of the described plane materiel of corona treatment; (c) solvent type ink is directly printed onto the described upper surface of described plane materiel, to form printed layers; (d) make described solvent type ink drying; (e) be coated onto on the described printed layers with the double exposure coating; (f) with the described lower surface of adhesive application to described plane materiel.

Description of drawings

[0013] Fig. 1 schematically illustrates the side-view of label configurations of the present invention.

Embodiment

[0014] when speaking of one or more layers of label, the meaning of term " transparent " is to see through this layer can see any material below this layer.About using " transparent " or " clear saturating " tag application to such as the clear saturating container of glass or plastics jar or bottle the time, the meaning is that the food in jar or bottle and jar or the bottle is visible by label.

[0015] speak of described label one or more layers or when speaking of label itself, the meaning of term " clear saturating " be the opacity of each layer or described label less than about 5%, the turbidity that each layer and described label have is less than about 10%.Opacity is measured according to TAPPI Test T425 os, and turbidity is measured according to ASTM testing method D-1023.

[0016] in one embodiment, described label comprises that (a) has the unprimed polypropylene plane materiel of upper surface and lower surface; (b) binder layer that contacts with the described lower surface of described plane materiel; (c) printed layers, it comprises the solvent-borne type gravure printing ink of the described upper surface that is printed on described plane materiel; (d) be superimposed upon overprint layer on the described ink lay.

[0017] among Fig. 1, label 10 comprises polymeric facestock 11, and it has upper surface and lower surface; Printed layers 12, it has upper surface and lower surface, and wherein the lower surface of printed layers 12 contacts with the upper surface of plane materiel 11; Overprint layer 13, its upper surface with printed layers 12 contacts and binder layer 14, and it contacts with the lower surface of plane materiel.

[0018] polymer facestock layer can be unitary film or multilayer film.Multilayer film can be by two-layer to ten layers or more multi-layered the composition.Polymeric facestock can be the orientation or be not orientated.Depend on the final use of label, polymeric facestock can be transparent or opaque.Opaque plane materiel generally comprises a kind of polymkeric substance described below and one or more offer the pigment of described plane materiel, or has the one deck in the multilayer plane materiel of desired color.The pigment that is used for this purpose is well-known in the art.As, by importing titanium dioxide and other white pigment, can be prepared into white films to described polymkeric substance.Also can import carbon black so that black or grey facestock or film to be provided.

[0019] there are many kinds of polymeric film material to can be used to prepare plane materiel of the present invention.Can comprise polymkeric substance and multipolymer as polymeric film material, for example at least a polyolefine, polyacrylic ester, polystyrene, polymeric amide, polyvinyl alcohol, poly-inferior hydrocarbon propylene vinegar ester, polythene-ethenol, poly-alkylene-vinyl acetate, urethane, polyacrylonitrile, polyester, polyester copolymer, fluoropolymer, polysulfones, polycarbonate, styrene-maleic anhydride copolymer, styrene acrylonitrile copolymer, based on the sodium of ethylene/methacrylic acid or the ionomer of zinc salt, cellulosics, polyacrylonitrile, alkylene-vinyl acetate copolymer, or the mixture of two or more formations in them.

[0020] polyolefine that can be used as polymeric film material comprises the polymkeric substance of the alkene monomer that contains 2-12 carbon atom and multipolymer (for example ethene, propylene, 1-butylene etc.), or this base polymer and multipolymer blended mixture.In one embodiment, described polyolefine comprises the polymkeric substance and the multipolymer of ethene and propylene.In another embodiment, described polyolefine comprises alfon, and such as the multipolymer of propylene-ethylene and propylene-butene-1 copolymer.Polypropylene and poly mixture, or the mixture of both and polypropylene-polyethylene and ethylene copolymers of any one or its also is an available in its both.In another embodiment, described polymeric film material has the material of very high propylene content for those, it can be the polypropylene homopolymer, it also can be propylene-ethylene copolymers, or the mixture of polypropylene and polyethylene and low ethylene content, or the mixture of propylene-butene-1 copolymer or polypropylene and a poly-butylene and low butene content.Available alfon and multipolymer have description in 5,709, No. 937 patents of the U.S. (people such as Adams).Multipolymer comprises that weight ethylene is approximately 10% propylene-ethylene copolymers and 1-butylene weight and is about propylene-butene-1 copolymer of 15%.The oriented film of describing in the patent of ' 937 is the clear saturating film that can be used on the plane materiel in the label of the present invention.With 5,709, the disclosure of No. 937 United States Patent (USP)s is incorporated this paper into as a reference.

[0021] the various polyethylene that can be used as polymeric film material comprise low, the highdensity polyethylene that neutralizes, and their mixture.An example of available new LDPE (film grade) (LDPE) is the Rexene 1017 that can obtain from Huntsman.An example of available high density polyethylene(HDPE) (HDPE) is the Formoline LH5206 that can obtain from Formosa Plastics.In one embodiment, described polymeric film material comprises the mixture of the LDPE of the HDPE of 80-90% and 10-20%.

[0022] can combine the alfon that is used as polymeric film material of the present invention separately or with propylene copolymer described herein, comprise such as those alfons with melt flow rate (MFR) (MFR) about 0.5 to about 20 of determining by ASTM Test D 1238.In one embodiment, have alfon less than 10 MFR, particularly useful at about 4 the alfons of MFR to about 10 scopes usually.The feature of available alfon also can be for having about 0.88 density to about 0.92g/cm3 scope.Many available alfons can be bought from many sources, and some useful polymkeric substance comprise: 5A97, can obtain from Dow Chemical, and the melt flow that has is 12.0g/10min, density is 0.90g/cm ³From the DX5E66 of Dow Chemical, its MFI is 8.8g/10min equally, and density is 0.90g/cm ³With the WRD5-1057 of Dow Chemical, its MFI is 3.9g/10min, and density is 0.90g/cm ³The available commercial propylene homopolymers also can obtain from Fina and Montel.

[0023] comprise can be from EMS American GrilonInc Sumter for the example of available polyamide resin, the trade name that S.C. obtains be Grivory such as CF6S, CR-9, XE3303 and G-21.G-21 is a kind of noncrystal nylon copolymer, and its second-order transition temperature is 125 ℃, and melt flow index (DIN 53735) is 90ml/10min, and extension at break (ASTM D638) is 15.Grrivory CF65 is a kind of nylon 6/12 film grade resins, and its fusing point is 135 ℃, and the melt flow index is 50ml/10min, and elongation at break is greater than 350%.Grilon CR9 is another kind of nylon 6/12 film grade resins, and its fusing point is 200 ℃, and the melt flow index is 200ml/10min, and elongation at break is 250%.Grilon XE 3303 is a kind of nylon 6.6/6.10 film grade resins, and its fusing point is 200 ℃, and the melt flow index is 60ml/10min, and elongation at break is greater than 100%.Other available polyamide resin comprise those by purchase obtain as International Paperof Wayne, N.J. Unirez production line is produced, and from Bostik, InternationalPaper, Fuller, the dipolymer type polyamide resin of Henkel (Versamid production line).Other polymeric amide that is suitable for comprises that those pass through the polymeric amide that produces with cyclohexane dicarboxylic amine condensation dimerized vegetable acids.The example of the polymeric amide that obtains from International Paper comprises Uni-Rez 2665; Uni-Rez 2620; Uni-Rez 2623; With Uni-Rez 2695.

[0024] polystyrene also can be used as polymer film material, and these polystyrene comprise homopolymer and styrol copolymer and use such as alpha-methyl styrene and replace cinnamic multipolymer.The example of styrol copolymer and styrene copolymer comprises: benzene alkene nitrile-butylene-styrene (ABS); Vinylbenzene-benzene alkene lonitrile copolymer (SAN); Styrene butadiene (SB); Styrene-maleic anhydride (SMA); And styrene methyl methacrylate (SMMA); Deng.An example of available styrol copolymer is the KR-10 that Phillips Petroleum Co. produces.KR-10 is considered to have the styrol copolymer of 1,3-butadiene.

[0025] Polyurethanes also can be used as polymer film material, and Polyurethanes can comprise aliphatics Polyurethanes and fragrant Polyurethanes.Polyurethanes generally is that (A) each molecule has at least two isocyanic ester (NCO) Polyurethanes of function and (B) such as the reaction product of at least one carbimide reactive group of the polyol with at least two hydroxide radicals or an amine.The Polyurethanes that is suitable for comprises diisocyanate monomer, and oligopolymer.

[0026] the available Polyurethanes comprises the aromatic polyether Polyurethanes, aliphatic polyether polyurethanes, aromatic polyester polyurethanes, aliphatic polyester polyurethanes, aromatic polycaprolactam polyurethanes, and aliphatic polycaprolactam polyurethanes.General available Polyurethanes comprises the aromatic polyether Polyurethanes, aliphatic polyether polyurethanes, aromatic polyester polyurethanes, and aliphatic polyester polyurethanes.

[0027] example of commercial Polyurethanes comprises Sancure 2710 ^And/or Avalure UR445 ^(it is equal to glycol polypropylene, isophorone vulcabond and 2, and the 2-xylic acid, its international specialty name cosmetic material name is called " PPG-17/PPG-34/IPDI/DMPACopolymer "), Sancure 878 ^, Sancure 815 ^, Sancure 1301 ^, Sancure2715 ^, Sancure 1828 ^, Sancure 2026 ^And Sancure 12471 ^(these can be from Noveon, Cleveland, Ohio buys), Bayhydrol DLN is (from Bayer Corp., McMurray, Pa. buy), Bayhydrol LS-2033 (Bayer Corp.), Bayhydrol 123 (Bayer Corp.), Bayhydrol PU402A (Bayer Corp.), Bayhydrol 110 (BayerCorp.), Witcobond W-320 (buying), Witcobond W-242 (Witco Performance Chemicals) from Witco Performance Chemicals, Witcobond W-160 (Witco Performance Chemicals), Witcobond W-612 (Witco PerformanceChemicals), Witcobond W-506 (Witco Performance Chemicals), NeoRezR-600 (dopes the polytetramethylene ether-based polyurethane of isophorone diamine, can be from Avecia, the predecessor buys for Avecia Resins), NeoRez R-940 (Avecia), and NeoRezR-960 (Avecia).

[0028] example of this aliphatic polyether polyurethanes comprises Sancure 2710 ^And/or Avalure UR 445 ^, Sancure 878 ^, NeoRez R-600, NeoRez R-966, NeoRezR-967 and Witcobond W-320.

[0029] in one embodiment, described plane materiel comprises at least a polyester polyurethane.The example of these urethane comprises that those names of being sold by Sanncor company are called " Sancure 2060 " (PAUR), " Sancure 2255 " (PAUR), " Sancure 815 " (PAUR), the plane materiel of " Sancure 878 " (polyether-type chaste tree ammonia ester) and " Sancure 861 " (polyether(poly)urethane), the name of Avecia company is called " Neorez R-974 " (PAUR), and the name that the plane materiel of " Neorez R-981 " (PAUR) and " Neorez R-970 " (PAUR) and Avecia company sell is called the acrylic copolymer of " Neocryl XK-90 " and disperses.

[0030] polyester from various ethylene glycol or polyol and one or more aliphatics or aromatic carboxylic acid preparation can be used for mould material.Polyethylene terephthalate (PET) and PETG (with the improved PET of cyclohexanedimethanol) are the available film formation materials, and it can obtain from many commercial source of Eastman that comprise.As, Kodar 6763 is a kind of PETG, can obtain from Eastman Chemical.Another kind of available polyester is the SelarPT-8307 of duPont company, and it is a kind of polyethylene terephthalate.

[0031] acrylic ester polymer and multipolymer and alkylene-ethene acetate resin (as the EVA polymkeric substance) also can be used as the film formation material for preparing structure of the present invention.The example of the polymkeric substance that can buy comprises Escorene UL-7520 (Exxon), the multipolymer of ethene and 19.3% vinyl-acetic ester; Nucrell 699 (duPont) comprises ethylene copolymer of 11% methacrylic acid etc.

[0032] ionomer (polyolefine that comprises molecular chain ion covalent linkage) also is an available.Ionomeric example comprises the ionic ethylene copolymer such as Surlyn 1706 (duPont), and it is considered to comprise the interchain ionic linkage based on the zinc salt of ethylene methacrylic acid copolymer.The Surlyn 1702 that duPont produces also is a kind of available ionomer.

[0033] polycarbonate also is an available, can obtain from Dow Chemical Co. (Calibre) G.E.Plastics (Lexan) and Bayer (Makrolon).The polycarbonate of most of commercializations can be by obtaining with dihydroxyphenyl propane and carbonyl chloride reaction in the interface process.The molecular weight of the polycarbonate of general commercialization changes between about 22,000 to about 35,000, and melt flow is generally in the 4-22g/10min scope.

[0034] in one embodiment, described facestock polymer material can comprise fluorinated polymer.Fluorinated polymer comprises the thermoplastic fluorocarbon such as polyvinylidene difluoride (PVDF) (PVDF).Fluorinated polymer can also comprise the multipolymer and the terpolymer of vinylidene.The available thermoplastic fluorocarbon is to be known as Pennwalt company, the polyvinylidene difluoride (PVDF) of the trade mark of Kynar.This polymkeric substance is a kind of high molecular (400,000) polymkeric substance, and it has carried out useful mixing with persistence and chemical impedance characteristic.Usually, use molecular-weight average to be about 200,000 to about 600,000 high molecular PVDF resin.

[0035] polymer film material can not contain inorganic fillers and/or pigment, to be used for saturating clearly plane materiel and clear saturating label, perhaps polymer film material can and/or comprise inorganic fillers and other organic or inorganic additive by cavitation, to provide such as appearance performance (opaque or chromatic film), the ideal performance of persistence and processing characteristics.Can add nucleator with increase degree of crystallinity, and therefore improve rigidity.The available examples of material comprises lime carbonate, titanium dioxide, metallics, fiber, fire retardant, anti-oxidizing compounds, thermo-stabilizer, photostabilizer, ultraviolet light stabilizers, antiblocking agent, processing aid, acid acceptor etc.When label described herein does not comprise the metal level that is superimposed upon on the facestock layer, often use opaque and/or white plane materiel.

[0036] selective polymer facestock material is come for the continuous polymer film in the membrane structure of the present invention provides such as improved tensile strength, elongation, shock strength, the ideal performance of tearing strength and optics (dim or gloss).The selection of polymeric facestock constituent material also is by such as melt viscosity, high speed tensile strength, the physical properties decision of elongation etc.In one embodiment, when wanting saturating or transparent clearly label, when the structure label, can use saturating or transparent clearly plane materiel.

[0037] the about 0.1-10 mil of the thickness of polymeric facestock (mil), or about 1-5mil.In one embodiment, the about 1-3mil of the thickness of described plane materiel.Described plane materiel can be made up of individual layer, or film can be two-layer or more than the multilayer film of two adjacent layerss.As, described film can comprise one deck polyolefine, the mixture of the multipolymer of one deck polyolefine and ethene and vinyl-acetic ester (EVA).In another embodiment, described film comprises three layers, as polyolefinic bottom or central core, and the top layer that bottom or central core are two-sided, bottom or central core can be made up of identical or different polymeric blends.Can select each layer in the multilayer plane materiel, so that ideal performance to be provided.

[0038] can be used on available individual layer in the label of this paper and multilayer film plane materiel can be by well known to a person skilled in the art that those process such as casting or expressing technique.In one embodiment, described film is processed by polymer-extruded or coextrusion processes.The extrudate of polymeric film material or coextrusion thing are that extrusion die or the extruding continuously of coextrusion die by the known type that is suitable for forms, and under the coextrusion situation, each layer is bonded to each other with permanent bonded state, so that whole coextrusion to be provided.

[0039] except coextrusion, the multilayer film plane materiel that can be used for this paper can be by with the preparation of getting off: extrude a continuous film to form one deck, by extruding one deck or more extra plays, one deck or more extra plays are applied on the extruding layer; By the ready-formed polymeric film is laminated into the ready-formed functional membrane; Or by with extra play from the sensitizer of polymeric film constituent material or solution deposition to the ready-formed film.

[0040] in one embodiment, described plane materiel used in this invention is not orientated.Just, described plane materiel and film are not subjected to the influence of thermal stretch and annealing steps.In other embodiments, the plane materiel that the label that the present invention uses comprises (single shaft) in the vertical is directed, or by well known to a person skilled in the art that thermal stretch and annealing and technology are directed on vertical or horizontal (twin shaft).As, described film is in the vertical only to be at least 2: but 1 ratio thermal stretch, and more commonly used be between about 2: 1-9: the ratio between 1.After described film is by thermal stretch, send it to usually on the annealing machine, on the annealing machine, at about 50 ℃, more normal is that 100 ℃-Yue 150 ℃ of scopes are interior at each temperature, film is annealed, or heat setting type, is cooled then.In another embodiment, described plane materiel is biaxially oriented.

[0041] ideal situation is, described film can both present certain rigidity in the longitudinal and transverse direction, to be easy to handling printing and distribution.Therefore, in one embodiment, vertically and rigidity transversely should be at least about 14 Gurley (mg), this is to use TAPPI Test T543pm to determine, among the embodiment below, in the Gurley rigidity on the both direction in about 5 Gurley units (being called balanced rigidity sometimes).

[0042] polymeric facestock that can be used in the described label of the present invention can be from the many Avery of comprising Dennison Corp., Painesville, and the source of Ohio is buied.Clear saturating film and white films all can obtain.

[0043] surface energies on the two surfaces of described plane materiel can be by such as corona discharge, flame, and the processing of plasma etc. improves, providing ideal performance to the surface, such as increasing bonding with the applied layer that is close to.The corona treatment of polymeric film and the step of flame treating are conventionally known to one of skill in the art.In one embodiment, facestock has been carried out Corona discharge Treatment on upper surface, has carried out flame treating on lower surface.

[0044] in one embodiment, polymeric facestock 11 comprises biaxially oriented polypropylene (BOPP) film.Available BOPP film can be bought from many sources in the label of the present invention, generally by Avery Dennison Corp., and Painesville, the Fasson RollMaterials of branch of Ohio obtains.Other source comprises Interplast Group LTD, Livingston, the AMTOPP of branch of NewJersey; Exxon Mobil Chemical Co., Macdon, NewYork; AET Films, New Castle, Delaware; UCB Films Inc., Smyrna, Georgia; And Vibac, Montreal, the Vifan USA of branch of Canada.

[0045] before the intaglio printing of solvent type ink, the BOPP facestock film is not coated with external coating (EC), or primes.Solvent type ink can be directly printed onto on the BOPP film.The surface energy of BOPP plane materiel can be by such as corona discharge, flame, or isoionic processing improves, and has applied layer adherent increase and that be close to surface to provide, and comprises the printing ink that is coated onto upper surface.In one embodiment, described BOPP plane materiel is pressed in the upper surface of plane materiel through Corona discharge Treatment.

[0046] printed layers 12 contacts with the upper surface of described polymeric facestock.Printed layers can be ink lay or graph layer, and described printed layers can be monochrome or the polychrome printing layer that depends on type information and/or predetermined shown design.These comprise such as sequence number, barcode, trade mark, the variable printed data of nutritional information etc.The thickness of printed layers generally in the scope of about 0.5-10 micron, and, in one embodiment, be about 1-5 micron, in another embodiment, be about 1-3 micron.The printing ink that printed layers is used comprises the solvent type ink that can buy.

[0047] in one embodiment, described printed layers is will comprise resin by intaglio printing, and the printing ink synthetics of suitable pigment or staining agent and one or more suitable volatile solvent deposits to and forms on the upper surface of polymeric facestock.After using the printing ink synthetics, the volatile solvent composition evaporation that printing ink is formed, only remaining non-volatile printing ink composition is to form printed layers.

[0048] the solvent type ink synthetics comprises at least a solvent-soluble resin, tinting material and organic solvent.The non-limitative example of resin comprises Polyurethanes, polyolefine, polypropylene, polymethacryls, polyamine, polyvinyl acetate, polyvinyl alcohol, polyvinyl ether, polyacrylonitrile, polystyrene, Polyvinylpyrolidone (PVP), polyvinyl chloride, polyalkylene oxide, cellulosic polymer and one or more monomeric multipolymer, monomer comprises alkene, the methyl amphetamine acrylate, vinyl-acetic ester, propylene acetate, vinylchlorid, vinyl cyanide, N-vinyl pyrrolidone, N-vinyl oxazolidine ketone, Vinyl Ether and other allyl group and vinyl monomer reach wherein two or more mixture.

[0049] tinting material can comprise soluble dye, pigment or its mixture.The type of dyestuff comprises matching stain, natural dyestuff, cation direct dye or negatively charged ion substantive dyestuff, basic dyestuff and reactive dyestuffs.Pigment can be any traditional organic or inorganic pigment.

[0050] the available organic solvent that is used for gravure printing ink includes, but are not limited to such as ethyl acetate propyl acetate, the esters solvent of isopropyl acetate etc., such as methyl alcohol, ethanol, the N-n-propyl alcohol, the ethanol of Virahol and such as the solvent of ester/alcohol mixture.

[0051] the solvent type ink synthetics also can comprise one or more additives, to regulate flow, the gloss of surface tension and curing inks.This additive generally comprises polymeric dispersant, tensio-active agent, filler, wax, or its combination.Additive can be used as levelling agent, white dyes, softening agent, dry catalyst, viscosity modifier, enriching substance, stain control agent, anti, slipproofing agent, static inhibitor, wetting agent, dispersion agent, defoamer, reductor (deareator) and/or tackifier, perhaps also available other additive is to provide specific function.

[0052] solvent type ink can be bought in the market.The example of this printing ink comprises that those trade names that can obtain from Sicpa are the printing ink of BARGOFOR.The pigment that is used for the solvent-borne type printing-ink can be bought from Sun Chemical, and trade name is SUNBRITE ^, SUNFAST ^And FASTOGEN ^Nitrocotton type printing ink can obtain MRH 23 serial Shan China inks from Siegwerk.Can comprise the nitrocotton type from the solvent type ink that XSYS Print Solutions obtains, polymeric amide type, polyvinyl butyral acetal type and polyvinyl chloride-type printing ink.

[0053] solvent type ink can be bought in the market.The example of this printing ink comprises that those trade names that can obtain from Sicpa are the printing ink of BARGOFOR.The pigment that is used for the solvent-borne type printing-ink can be bought from Sun Chemical, and trade name is SUNBRITE ^, SUNFAST ^And FASTOGEN ^Nitrocotton type printing ink can obtain MRH 23 serial Shan China inks from Siegwerk.Can comprise the nitrocotton type from the solvent type ink that XSYS Print Solutions obtains, polymeric amide type, polyvinyl butyral acetal type and polyvinyl chloride-type printing ink.

[0054] in one embodiment, described printing-ink comprises embossed reflective metal flakes.The printing-ink that comprises the floating type pigment of embossing metal has description in the U.S.'s 5,672,410 patents, this paper incorporates it into the form of reference.In one embodiment, the meticulous special foil of embossing with high-grade brightness and colouring intensity is by following generation: release surface is provided on carrier; With having diffraction lattice figure greater than the 45 scale graph to described release surface embossing; Give described embossing release surface spraying thin reflecting metallic film; Remove described metallic membrane from described release surface, to form the solvent dispersion of pressureization tinsel, embossed metal flakes has been duplicated the diffraction lattice figure; The size of particles of the sheet that comprises in disperseing with control remains on D50 or remains on greater than 75 microns with the size of particles that will be included in embossed flakes wherein.Embossed flakes can be used for producing the printing-ink with high brightness, and brightness is high is characterized as visually clearly flash of light or the combining of light-emitting flash effect and high colouring intensity or high chroma.Embossed metal flakes can combine with vinylformic acid and/or Nitro cellulose resin tackiness agent, to produce printing-ink.The printing-ink that contains embossed metal flakes can be bought from Eckart GmbH.

[0055] transparent overprint layer 13 is superimposed upon on the printed layers.The label card is before or after the container, and the protection overprint layer provides ideal performance to label.In certain embodiments, the existence of transparent overprint layer can provide such as antistatic property, the additional properties of rigidity and/or weathering resistance, and overprint layer can protect printed layers not to be subjected to as weather, the sun, wearing and tearing, moisture, the influence of water etc.The performance of the printed layers below transparent overprint layer can strengthen is to provide more smooth more abundant image.The protection overprint layer can also be designed to wear-resistant, radioprotective (as, UV), chemical resistant properties, heat-resisting, therefore protect label, the aged of particularly protecting printed layers not caused by a variety of causes influences.Overprint layer also can comprise static inhibitor, or anti, when being attached on the container with convenient label with very high speed, makes processing thereafter easier.Also can select overprint layer, being subjected to thereafter washing/rinsing when container, filler and pasteurization, or liquid provides the available label to container when immersing (as ice bath), makes and can not show the unfavorable result who mentions/haze such as label.Overprint layer can be applied to printed layers with solution.In about 0.5-5mil scope, in one embodiment, the thickness of overprint layer is in about 1-3mil scope usually for the thickness of overprint layer.

[0056] in one embodiment, overprint layer comprises two components, solvent-borne type, and non-chlorine type, high-gloss varnish can be bought from Sicpa (Switzerland), and trade name is BARGOFLEXL726-2.Stiffening agent CFA 4488 also can buy from Sicpa, can use with two component varnish.In another embodiment, overprint layer comprises single component varnish.The UV flexo cationic varnishes can be from Sicpa, and Sun Chemical (New Jersey) and XSYS Print Systems buy.

[0057] binder layer 14 of label comprises pressure sensitive adhesive (PSA).Description to the available pressure sensitive adhesive can be from Encyclopedia of Polymer Science and Engineering, and Vol.13.Wiley-lnterscience Publishers finds in (New York, 1988).Other to available PSA be described in Polymer Science and Technology, Vol.1, lntersciencePublishers can find in (New York, 1964).Traditional PSA comprises the PSA of acrylic type, and the PSA of rubber-type and silicon rubber PSA are available.PSA can be solvent type, also can be water type tackiness agent.

[0058] in one embodiment, printed labels can provide unprimed bi-oriented polypropylene plane materiel by following generation (a), and this plane materiel has upper surface and lower surface; (b) the described upper surface of the described plane materiel of corona treatment; (c) solvent type ink is directly printed onto the described upper surface of described plane materiel, to form printed layers; (d) dry described solvent type ink; (e) coat the double exposure coating for described printed layers; (f) tackiness agent is coated onto the lower surface of described plane materiel.Can solvent type ink be directly printed onto described plane materiel by intaglio printing.

[0059] label of the present invention has special purposes in foodstuffs industry, and the container in the foodstuffs industry can be subjected to rough relatively processing.The operation that labelled container must stand comprises filler, packing, transportation and storage, and pasteurization and cyclical operation.In transportation, labeled container is vulnerable to a large amount of line pressures, and the mutual wearing and tearing between the container.Polymer container can be inflexible or flexibility.But flexible cell comprises the extruded food container.Can be with transparent polymeric film to obtain looking do not have the effect of label, the existence of label is to human consumer and not obvious.

Example

[0060] is the example of label produced according to the present invention below, and label is attached to Glass Containers.

[0061] use the solvent-borne type gravure printing ink label graphic to be printed onto on the surface of 2mil thickness, Fasson, Painesville, the transparent BOPP film of Ohio is called BEV/MDO A, BEV/MDO B and BEV/MDO C.

[0062] film of Shi Yonging is not primed, and does not have overpainting yet.Just before using described printing ink, the described print surface of described film is through corona treatment.

[0063] uses the trade name of buying from Sicpa (Switzerland) solvent type ink, with the surface of printing ink intaglio printing to described film as BARGOFOR.Can use the printing ink of multiple color.Being used for the unit depth of gravure cylinder of inking is 5 microns-Yue 120 microns, and this depends on the artistic carving technology.Be coated with after the printing ink, the film that prints be heated to make the printing ink solvent evaporation.Then overprint varnishes is coated with all over printed layers, and allows dry.

[0064] those skilled artisans will appreciate that can deposit multilayer printing ink, and purpose is to obtain ideal printing effect, color and/or quality.Sedimentary printing ink can be identical or different.

[0065] label of Sheng Chaning is tested by pasteurization, and in test, (about 25 ℃) label was placed in the stove 50 minutes under the room temperature, was heated to 70 ℃, and then cool to room temperature.Also by being designed to the wear testing of simulate operation, in the test, labelled container was rubbed mutually 2 minutes under drying conditions the label of producing artificially, under wet condition, rubbed mutually 2 minutes, and then rubbed 2 minutes under drying conditions.

[0066] although about the preferred embodiment of the present invention, describe the present invention, those skilled in the art are after reading specification sheets, and various modifications will become apparent.Therefore, be appreciated that invention disclosed herein is intended to cover the interior this modification of being made of scope of accessory claim.

Claims (17)

1. food product containers that provides label thereon, described label comprises that (a) has the polymeric facestock of upper surface and lower surface;

The pressure sensitive adhesive layer that contacts with the described lower surface of described plane materiel;

Be printed on the solvent type ink layer on the described lower surface of described plane materiel; With

Be superimposed upon the double exposure coating on the described ink lay.

2. container according to claim 1, the described upper surface of wherein said plane materiel is through corona treatment.

3. container according to claim 1, wherein said double exposure coating comprises a kind of two component varnish.

4. container according to claim 1, wherein said double exposure coating comprises positively charged ion varnish.

5. container according to claim 1, wherein said plane materiel comprises bi-oriented polypropylene.

6. container according to claim 1, wherein said double exposure coating are the skins of described label.

7. container according to claim 1, wherein said container is made by glass.

8. container according to claim 1, wherein said container is made by at least a polymkeric substance.

9. container according to claim 8, wherein said container is an inflexible.

10. container according to claim 8, wherein said container is flexible.

11. container according to claim 1, wherein said printing ink comprises embossed metal flakes.

12. a manufacturing is used for the method for the printed label of food product containers, comprising:

One unprimed bi-oriented polypropylene plane materiel is provided, and this plane materiel has upper surface and lower surface;

Described upper surface to described plane materiel carries out corona treatment;

Solvent type ink is directly printed onto on the described upper surface of described plane materiel, to form printed layers;

Dry described solvent type ink;

Coat the double exposure coating for described printed layers; With

Tackiness agent is coated onto the described lower surface of described plane materiel.

13. method according to claim 12, wherein said double exposure coating comprises a kind of two component varnish.

14. method according to claim 12, wherein said tackiness agent comprises pressure sensitive adhesive.

15. method according to claim 12 comprises that further the described tackiness agent with described label is attached on the food product containers.

16. method according to claim 12, wherein said printing comprises intaglio printing.

17. method according to claim 12, wherein said printing ink comprises embossed metal flakes.

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