EP1871952A2 - High security paper and process of manufacture - Google Patents
High security paper and process of manufactureInfo
- Publication number
- EP1871952A2 EP1871952A2 EP06766259A EP06766259A EP1871952A2 EP 1871952 A2 EP1871952 A2 EP 1871952A2 EP 06766259 A EP06766259 A EP 06766259A EP 06766259 A EP06766259 A EP 06766259A EP 1871952 A2 EP1871952 A2 EP 1871952A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- paper
- film
- security
- security feature
- water soluble
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 74
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 132
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 6
- 239000002002 slurry Substances 0.000 claims description 14
- 239000011159 matrix material Substances 0.000 claims description 12
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 12
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 10
- 235000019422 polyvinyl alcohol Nutrition 0.000 claims description 10
- -1 polymethacrylamide Polymers 0.000 claims description 8
- 229920001131 Pulp (paper) Polymers 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 108010010803 Gelatin Proteins 0.000 claims description 6
- 229920000159 gelatin Polymers 0.000 claims description 6
- 235000019322 gelatine Nutrition 0.000 claims description 6
- 235000011852 gelatine desserts Nutrition 0.000 claims description 6
- 229920001903 high density polyethylene Polymers 0.000 claims description 6
- 239000004700 high-density polyethylene Substances 0.000 claims description 6
- 229940068984 polyvinyl alcohol Drugs 0.000 claims description 5
- 239000004698 Polyethylene Substances 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 claims description 4
- 229920006378 biaxially oriented polypropylene Polymers 0.000 claims description 4
- 239000011127 biaxially oriented polypropylene Substances 0.000 claims description 4
- 229920002678 cellulose Polymers 0.000 claims description 4
- 239000001913 cellulose Substances 0.000 claims description 4
- 238000001704 evaporation Methods 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 4
- 239000008273 gelatin Substances 0.000 claims description 4
- 229920005669 high impact polystyrene Polymers 0.000 claims description 4
- 239000004797 high-impact polystyrene Substances 0.000 claims description 4
- 229920000092 linear low density polyethylene Polymers 0.000 claims description 4
- 239000004707 linear low-density polyethylene Substances 0.000 claims description 4
- 229920001684 low density polyethylene Polymers 0.000 claims description 4
- 239000004702 low-density polyethylene Substances 0.000 claims description 4
- 229940099514 low-density polyethylene Drugs 0.000 claims description 4
- 229920000747 poly(lactic acid) Polymers 0.000 claims description 4
- 229920000573 polyethylene Polymers 0.000 claims description 4
- 239000004626 polylactic acid Substances 0.000 claims description 4
- 229920001155 polypropylene Polymers 0.000 claims description 4
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 2
- 239000004375 Dextrin Substances 0.000 claims description 2
- 229920001353 Dextrin Polymers 0.000 claims description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 2
- 239000001856 Ethyl cellulose Substances 0.000 claims description 2
- 229920000084 Gum arabic Polymers 0.000 claims description 2
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 claims description 2
- 239000004354 Hydroxyethyl cellulose Substances 0.000 claims description 2
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 claims description 2
- 229920002845 Poly(methacrylic acid) Polymers 0.000 claims description 2
- 239000002202 Polyethylene glycol Substances 0.000 claims description 2
- 239000004373 Pullulan Substances 0.000 claims description 2
- 229920001218 Pullulan Polymers 0.000 claims description 2
- 229920002125 Sokalan® Polymers 0.000 claims description 2
- 229920002472 Starch Polymers 0.000 claims description 2
- 229920008262 Thermoplastic starch Polymers 0.000 claims description 2
- 239000000205 acacia gum Substances 0.000 claims description 2
- 235000010489 acacia gum Nutrition 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- 239000011230 binding agent Substances 0.000 claims description 2
- 239000004622 biodegradable polyester Substances 0.000 claims description 2
- 229920000229 biodegradable polyester Polymers 0.000 claims description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 2
- 229940105329 carboxymethylcellulose Drugs 0.000 claims description 2
- 235000019425 dextrin Nutrition 0.000 claims description 2
- 229920005839 ecoflex® Polymers 0.000 claims description 2
- 229920001249 ethyl cellulose Polymers 0.000 claims description 2
- 235000019325 ethyl cellulose Nutrition 0.000 claims description 2
- 229960004667 ethyl cellulose Drugs 0.000 claims description 2
- 238000011049 filling Methods 0.000 claims description 2
- 150000004676 glycans Chemical class 0.000 claims description 2
- 229920001519 homopolymer Polymers 0.000 claims description 2
- 229940071826 hydroxyethyl cellulose Drugs 0.000 claims description 2
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 claims description 2
- 239000001863 hydroxypropyl cellulose Substances 0.000 claims description 2
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 claims description 2
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 2
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 2
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 2
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims description 2
- 229940071676 hydroxypropylcellulose Drugs 0.000 claims description 2
- 229920000554 ionomer Polymers 0.000 claims description 2
- 229920000609 methyl cellulose Polymers 0.000 claims description 2
- 239000001923 methylcellulose Substances 0.000 claims description 2
- 235000010981 methylcellulose Nutrition 0.000 claims description 2
- 239000002105 nanoparticle Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 125000000612 phthaloyl group Chemical group C(C=1C(C(=O)*)=CC=CC1)(=O)* 0.000 claims description 2
- 229920002401 polyacrylamide Polymers 0.000 claims description 2
- 239000004584 polyacrylic acid Substances 0.000 claims description 2
- 229920001223 polyethylene glycol Polymers 0.000 claims description 2
- 229920000193 polymethacrylate Polymers 0.000 claims description 2
- 229920001282 polysaccharide Polymers 0.000 claims description 2
- 239000005017 polysaccharide Substances 0.000 claims description 2
- 229920002635 polyurethane Polymers 0.000 claims description 2
- 239000004814 polyurethane Substances 0.000 claims description 2
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 2
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 2
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 2
- 235000019423 pullulan Nutrition 0.000 claims description 2
- 239000008107 starch Substances 0.000 claims description 2
- 235000019698 starch Nutrition 0.000 claims description 2
- 239000004628 starch-based polymer Substances 0.000 claims description 2
- 241000978776 Senegalia senegal Species 0.000 claims 1
- 238000010348 incorporation Methods 0.000 claims 1
- 239000011248 coating agent Substances 0.000 abstract description 7
- 238000000576 coating method Methods 0.000 abstract description 7
- 238000001125 extrusion Methods 0.000 abstract description 5
- 238000007639 printing Methods 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 description 15
- 239000012467 final product Substances 0.000 description 9
- 238000009472 formulation Methods 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 6
- 229920003023 plastic Polymers 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 239000013055 pulp slurry Substances 0.000 description 5
- 238000005266 casting Methods 0.000 description 4
- 239000000976 ink Substances 0.000 description 4
- 229920000742 Cotton Polymers 0.000 description 3
- 238000013459 approach Methods 0.000 description 3
- 239000000975 dye Substances 0.000 description 3
- 238000007667 floating Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 244000215068 Acacia senegal Species 0.000 description 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 240000006248 Broussonetia kazinoki Species 0.000 description 1
- 235000006716 Broussonetia kazinoki Nutrition 0.000 description 1
- 241000345998 Calamus manan Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 240000000491 Corchorus aestuans Species 0.000 description 1
- 235000011777 Corchorus aestuans Nutrition 0.000 description 1
- 235000010862 Corchorus capsularis Nutrition 0.000 description 1
- 241001265525 Edgeworthia chrysantha Species 0.000 description 1
- 240000006240 Linum usitatissimum Species 0.000 description 1
- 235000004431 Linum usitatissimum Nutrition 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 244000082204 Phyllostachys viridis Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 244000274883 Urtica dioica Species 0.000 description 1
- 235000009108 Urtica dioica Nutrition 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011121 hardwood Substances 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920000307 polymer substrate Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 235000012950 rattan cane Nutrition 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000011122 softwood Substances 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/30—Multi-ply
- D21H27/32—Multi-ply with materials applied between the sheets
- D21H27/34—Continuous materials, e.g. filaments, sheets, nets
- D21H27/36—Films made from synthetic macromolecular compounds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper
- D21H21/44—Latent security elements, i.e. detectable or becoming apparent only by use of special verification or tampering devices or methods
- D21H21/48—Elements suited for physical verification, e.g. by irradiation
Definitions
- This invention relates to high security paper and to a process for the manufacture of high security paper.
- the cost of currency notes includes the cost of the paper plus the cost of ink (60%) and other hidden costs (40%) like vending/distribution costs to the end user.
- High strength currency paper is necessary and 100 % polymer currency, also known as "plastic” currency, has been in circulation in various countries.
- This "plastic" currency has inherent disadvantages. For example they cannot have a security watermark. Deadfold is not like paper, special inks are needed to adhere to polymer substrate, security threads cannot be inserted/ embedded so surface security (like printing, embossing) is the only method of securing these kinds of "plastic” currency notes. This has been perceived by many countries to be a compromise, which many Reserve Banks are ready to accept in line of the phenomenal strength that this "plastic” currency can impart. Banknotes with lower denominations having lower working life are being promoted as targets for these "plastic” currency notes.
- the security feature(s) is/are embedded/embossed/printed within/on the polymeric film and this pre-formed polymeric film containing the security feature(s) is incorporated into the security paper during the paper making process.
- the security features are printed on a continuous web of polymeric film that is incorporated in the paper during the papermaking process.
- the security features can be embedded/embossed/printed at precise locations onto the continuous web of polymeric film so as to accurately position the security features when the paper and polymeric film webs are brought together.
- This method allows security features having a wide range of to be embedded in the finished paper. Also, multi-coloured multi security features can be incorporated in a reliable manner.
- WSF water soluble film
- WSF water soluble film
- WSF water soluble film
- WSF water soluble film
- WSF can be manufactured by process of direct casting on a conveyor, by casting on a detachable liner, by casting from a T-die casting, by blowing film on extrusion machines, or by extrusion via T-die extrusion.
- the formulation of the WSF shall determine the temperature of water in which the WSF shall easily dissolve. This range of water temperature varies between 5 0 C to 100 0 C.
- WSF encompass all types of WSF made from any of the above methods, including direct coating of WSF film forming resins.
- CWSF means cold water soluble film, which becomes tacky, break and finally dissolve in temperature ranging from 5 0 C to 40 0 C, preferably from 10 0 C to 40 0 C, more preferably from 20 0 C to 40 0 C.
- the time of tack, break and dissolution of the CWSF shall range between 1 second to 3 minutes upon contact with water/ water pulp slurry. However, this shall depend upon the CWSF formulation.
- HWSF means hot water soluble film, which shall become tacky, break and finally dissolve in temperature ranging from 40 0 C to 100 0 C, preferably from 45 0 C to 90 0 C, more preferably from 50 0 C to 85 0 C.
- the time of tack, break and dissolution of the HWSF shall range between 5 seconds to 5 minutes upon contact with hot water/ water pulp slurry. However, this shall depend upon the HWSF formulation.
- NSHF means non soluble hydrophilic film, which shall become tacky and may break/crack at certain places but shall not dissolve on contact with water/water pulp slurry.
- the tack and break time shall range between 7 seconds to 10 minutes, which can depend upon the formulation of the non soluble hydrophilic film and the temperature of water.
- the water soluble films mentioned in this invention are made from materials selected from various film forming resins like polyvinyl alcohol copolymer ionomers, polyvinyl alcohol homopolymer, non - ionomeric poly vinyl alcohol polymer, polymethacrylate., polyvinyl alchohol, polyacrylamide, polymethacrylamide, polyacrylic acid, polymethacrylic acid, polyurethane, polyethyleneglycol, polyvinylpyrrolidone, proteinaceous binders such as gelatin, modified gelatins such as phthaloyl gelatin, polysaccharides such as starch, gum Arabic, pullulan and dextrin and water soluble cellulose derivatives or combination thereof.
- various film forming resins like polyvinyl alcohol copolymer ionomers, polyvinyl alcohol homopolymer, non - ionomeric poly vinyl alcohol polymer, polymethacrylate., polyvinyl alchohol, polyacrylamide, polymethacrylamide, polyacrylic acid
- the cellulose derivatives used are methyl cellulose, hydroxy propyl cellulose, hydroxy propyl methyl cellulose, hydroxy propyl ethyl cellulose, hydroxy ethyl cellulose, carboxy methyl cellulose. However, these are by no means limiting.
- NSNHF This is a non soluble non hydrophilic type of film. This type of film is readily available in the market and can be selected from PP (Poly propylene), PE (Poly ethylene), LDPE (Low density poly ethylene), HDPE (high density polyethylene), LLDPE (Linear low density polyethylene), HIPS (High impact polystyrene), HMHDPE (High molecular high density polyethylene), BOPP (Biaxially oriented poly propylene). However, these are by no means limiting.
- This non soluble non hydrophilic film can also be made out of biodegradable materials such as PLA (Poly Lactic Acid), PHA (polyhydroxyalkanoic acid) or thermoplastic starch materials or biodegradable polyesters such as ecoflex.
- biodegradable materials such as PLA (Poly Lactic Acid), PHA (polyhydroxyalkanoic acid) or thermoplastic starch materials or biodegradable polyesters such as ecoflex.
- NSNHF is necessarily combined with a layer of CWSF polyme on one or both sides, depending upon its end use.
- the films used for increasing the strength of the paper may be a cold or hot water soluble film or non soluble hydrophilic film or non soluble non hydrophilic film or a combination of these films as mentioned below: 1.
- CWSF + HWSF This is a combination of cold and hot water soluble films wherein the cold/hot water soluble is cast/coated/laminated onto the hot/cold water soluble film.
- CWSF + HWSF + CWSF This is a combination of water soluble films wherein the hot water soluble film will be between two cold water soluble films.
- CWSF + NSHF This is a combination of cold water soluble and non soluble hydrophilic films wherein the NSHF/CWSF is cast/coated/laminated on the CWSF/NSHF film.
- CWSF + NSHF + CWSF This is a combination of cold water soluble / non soluble hydrophilic / cold water soluble films wherein the NSHF will be between two cold water soluble films.
- CWSF + NSNHF This is a combination of cold water soluble and non soluble non hydrophilic film wherein the NSNHF/CWSF is cast/coated/laminated on the CWSF/NSNHF film.
- CWSF + NSNHF + CWSF This is a combination of cold water soluble / non soluble non hydrophilic / cold water soluble films wherein the NSNHF will be between two cold water soluble films.
- Machine direction strips matrix Strips of polymeric films inserted/cast/coated onto another polymeric film. This combination can be formed by zone coating or discreet printing or zone extrusion striping or formation of a film on another polymeric film which is then inserted into paper during the paper making process.
- Woven tape matrix Strips of polymeric films or PVA threads inter- woven by a warp and weft method.
- the polymeric film or its combination as described before is slit into microtapes having width in the range of 3 mm to 15 mm, preferably 4 mm to 10 mm, more preferably 5 mm to 7 mm.
- this range is by no means limiting.
- the size of the PVA threads ranges from 50 deniers to 1000 deniers, preferably 150 deniers to 700 deniers, more preferably from 300 deniers to 500 deniers.
- this range is by no means limiting.
- Paper pulp The paper pulp used for manufacturing this high strength paper is selected from a mixture of fibers of hardwood and softwood, cotton fibres such as cotton linters and cotton rags, linen, flax, jute, hemp, kozo, mitsumata, gampi, grass fibres such as esparto, bamboo, giant nettle, rice straw and rattan; and wood pulp.
- cotton fibres such as cotton linters and cotton rags
- grass fibres such as esparto, bamboo, giant nettle, rice straw and rattan
- wood pulp wood pulp
- the security features embedded in the water soluble film may include although not limited to micro-printed text, logos, metallised/demetallised particles/fibres, bar-codes, watermarks, nano-particles which may be machine readable, micro-taggants, DNA (synthetic, natural), UV, PCR, computer, machine readable, RFID devices, etc.
- the polymeric film may be a cold water soluble film or hot water soluble film or water insoluble hydrophilic film or water insoluble non hydrophilic film or a combination of cold + hot + cold water soluble films or cold + hot water soluble films or cold + non soluble hydrophilic film or cold + non soluble hydrophilic + cold water soluble films or cold + non soluble non hydrophilic films or cold + non soluble non hydrophilic + cold films or slit strips of one or many of these combinations woven or intertwined offline or strips of polymeric films inserted/cast/coated onto another polymeric film and incorporated into the paper during the paper making process.
- polymeric film is to be construed accordingly to include all of these for the purpose of this invention.
- perforations are used for HWSF or NSHF or NSNHF types of polymeric films or their combinations, but this shall not be limiting as far as all types of polymeric films and their combinations are concerned.
- the polymeric film may be plain or perforated wholly, partially or randomly.
- One of the embodiment of the invention provides for strengthening the security paper by incorporating a water soluble film or non soluble hydrophilic film or non soluble non hydrophilic film or a combination of these films during the paper making process.
- the security feature(s) is/are delivered through a cold water soluble film wherein the security feature(s) is/are embedded/printed within/on the cold water soluble film.
- the cold water soluble film will solubilise within the pulp fibres and hence deliver the security features at the desired location.
- the security feature(s) is/are delivered through a hot water soluble film, optionally perforated selectively, wherein the security features are embedded/printed within/on the hot water soluble film.
- the hot water soluble film - carrying the security feature(s) - will remain intact due to the differential temperature of pulp + water slurry and deliver the security features at the desired location, thereby solving the problem of micro-text words or logos floating within the matrix of the paper pulp which may happen when using only a CWSF, or strips of CWSF. It will also give added strength to the final product.
- the security feature(s) is/are delivered through a non soluble hydrophilic film, optionally perforated selectively, wherein the security feature(s) is/are embedded/printed within/on the non soluble hydrophilic film.
- This film will not dissolve into the pulp fibres but will become tacky due to its hydrophilic nature and shall adhere to the partially formed bed of pulp. Hence the film will remain intact and deliver the security feature(s) at the desired location. It will also give added strength to the final product. This film can be used particularly when the water-pulp slurry temperature is a little higher. It will also give added strength to the final product.
- the security feature(s) is/are delivered through a non soluble non hydrophilic film wherein the security features are embedded/printed within/on the NSNHF.
- the non soluble non hydrophilic film will not dissolve into the pulp fibres and also will not become tacky but will be sucked inside as it is perforated, hence delivering the security features at precise place and increasing the strength of the paper.
- the security feature(s) is/are delivered through a combination of cold + hot water soluble film, wherein the HWSF is optionally perforated selectively and the security feature(s) is/are embedded/embossed/printed within/on the hot water soluble film.
- the cold water soluble film will solubilise into the pulp fibres increasing the strength of the paper while the hot water soluble film containing the security feature(s) will remain intact and hence deliver the security features at the desired place. It will also give added strength to the final product.
- the security feature(s) is/are delivered through a combination of cold + hot + cold water soluble films, wherein the HWSF is optionally perforated selectively and security feature(s) is/are embedded/embossed/printed within/on the hot water soluble film.
- the cold water soluble films will solubilise into the pulp fibres increasing the strength of the paper while the hot water soluble film consisting security features will remain intact due to the differential temperature of the pulp + water slurry, to locate the security feature(s) at the desired place and give added strength to the final produce.
- the security feature(s) is/are delivered through a combination of cold + non soluble hydrophilic films, wherein the NSHF is optionally perforated selectively and the security feature(s) is/are embedded/embossed/printed within/on the non soluble hydrophilic film.
- the cold water soluble film will solubilise into the pulp fibres increasing the strength of the paper while the non soluble hydrophilic film will not dissolve into the pulp fibres but will become tacky due to its hydrophilic nature and shall adhere to the partially formed bed of pulp. Hence the film will remain intact and deliver the security feature(s) at the desired place. It will also give added strength to the final product.
- the security feature(s) is/are delivered through a combination of cold + non soluble hydrophilic + cold water soluble films, wherein the NSHF is optionally perforated selectively and the security feature(s) is/are embedded/embossed/printed within/on the non soluble hydrophilic film.
- the cold water soluble films will solubilise into the pulp fibres increasing the strength of the paper while the non soluble hydrophilic film consisting security features will not dissolve into the pulp fibres but will become tacky due to its hydrophilic nature and shall adhere to the partially formed bed of pulp. Hence the film will remain intact and deliver the security feature(s) at the desired place. It will also give added strength to the final product.
- the security feature(s) is/are delivered through a combination of cold + non soluble non hydrophilic films, wherein the NSNHF is optionally perforated selectively and the security feature(s) is/are embedded/embossed/printed within/on the non soluble non hydrophilic film.
- the cold water soluble film will solubilise into the pulp fibres increasing the strength of the paper while the non soluble non hydrophilic film will not dissolve into the pulp fibres. Hence the film will remain intact and deliver the security feature(s) at the desired place. It will also give added strength to the final product.
- the security feature(s) is/are delivered through a combination of cold + non soluble n ⁇ n hydrophilic + cold water soluble films, wherein the NSNHF is optionally perforated selectively and the security feature(s) is/are embedded/embossed/printed within/on the non soluble non hydrophilic film.
- the cold water soluble films will solubilise into the pulp fibres increasing the strength of the paper while the non soluble non hydrophilic film consisting security features will not dissolve into the pulp fibres. Hence the film will remain intact and deliver the security feature(s) at the desired place. It will also give added strength to the final product.
- the security feature(s) is/are delivered through a combination of polymeric films including strips of films wherein the strips are inserted/cast/coated onto another film, to deliver security features that are embedded/printed within/on the film strips.
- HWSF consisting security features
- the cold water soluble film will solubilise into the pulp fibres increasing the strength of the paper while the hot water soluble film with security features will remain intact due to the differential temperature of pulp-water slurry, thus solving the problem of micro-text words or logos floating within the matrix of the paper pulp which may happen while only using only CWSF, or strips of CWSF.
- the security feature(s) is/are delivered through a film matrix wherein the security features embedded/printed within/on the polymeric film strips or on the PVA threads are inter- woven by a warp and weft method.
- the strips may be a combination of cold + hot water soluble films or only hot water soluble strips or non soluble hydrophilic strips or only cold water soluble strips, to deliver the security features that are embedded/printed within/on the hot water soluble film.
- the HWSF or NSHF used are optionally perforated selectively
- the cold water soluble strips will solubilise into the pulp fibres increasing the strength of the paper while the hot water soluble strips containing the security feature(s) will remain intact and hence deliver the security features at the desired place. It will also give added strength to the final product.
- the present invention provides security paper made by the method according to the first aspect of the invention.
- Figure 1 shows a first process for the manufacture of high strength paper according to the invention
- Figure 2 shows a second process for the manufacture of high strength paper according to the invention.
- polymeric film containing security features can also be incorporated during the fourdrinier process of paper making.
- step 3 if the film is a CWSF embedded/embossed/printed with security features, then the film will start dissolving as soon as it comes in contact with the pulp bed and will be sucked into the paper when it passes through vacuum boxes and the security features will remain intact in the pulp bed.
- the film is a HWSF or NSHF or NSNHF or any of the combination having atleast one layer or strip of HWSF / NSHF / NSNHF, then the film will not dissolve and will stay on the surface of the pulp bed due to lower capacity of the vacuum suction box.
- a HWSF or NSHF or NSNHF or any other combinations of films consisting HWSF / NSHF / NSNHF have to be incorporated into the pulp bed, a Twin former process may be required, depending upon the needs and ultimate quality of paper required.
- a first ply of wet paper is formed as the water-pulp slurry coming from the stock approach box (12) is dropped on a continuous moving belt (11) by the first former (13).
- the temperature of the pulp water slurry in the stock approach box ranges 15 0 C to 40 0 C, more preferably from 25 0 C to 30 0 C.
- the concentration of the pulp fibres in the pulp-water slurry in the stock approach box is 5% to 7%.
- the first ply of wet paper formed by the first former constitutes of 80% of wt/thickness of the final paper.
- a second ply of wet paper is formed on the polymeric film side of the first ply of wet paper by the second former (14).
- the cylinder (14), covered with a wire cloth, rotates in the vat (17) containing pulp-water slurry. As the cylinder rotates, water is removed from the inside of the cylinder, while a layer of pulp fibres is formed on the outside. This is consolidated by the couch roll (18), which squeezes more water away.
- the couch roll also peels the wet paper cleanly off the cylinder and transfers it to the moving continuous belt, which carries it to the press section.
- the second ply of wet paper formed by the second former constitutes of 20% of wt/thickness of the final paper. More water is removed at the press section (19), and the two ply paper is further sent to dryers for further evaporating the moisture from the paper web.
- the polymeric film or combination of polymeric films containing the security features may be any of the types previously described where the security features are incorporated during the paper making process at precise locations using the polymeric film as a carrier to position the security features precisely in the final paper.
- the present invention provides a process for making security paper in which one or more security features is accurately positioned in the paper and the paper is optionally strengthened using polymeric film as the carrier for the security feature(s) during the manufacturing process.
- the polymeric film may be a water soluble film selectively soluble at temperatures above or below the temperature of the water contained in the paper substrate to which it is applied during the process. In this way we can control the manner in which the water soluble film is incorporated and hence the location of the security feature(s) in the finished product.
- the water soluble film may dissolve or remain intact and we may employ combinations of films which may dissolve or remain intact or combinations of any of these with or without other films such as non soluble hydrophilic films.
- a method of making security paper comprising providing a carrier film containing one or more security features at predetermined locations, forming a paper web, applying the carrier film to the web to position the security feature(s) at desired places on the web wherein the carrier film includes water soluble films, non soluble hydrophilic films and non soluble non hydrophilic films.
- the water soluble film may solubilise and be absorbed into the web leaving the security feature(s) at desired places on the web. Alternatively, the water soluble film may remain intact to position the security feature(s) at desired places on the web.
- the carrier film may comprises two or more films having different solubilities where the differential solubilities of the films can be used to position the security feature(s) at desired locations during the paper making process and optionally to strengthen the paper.
- the carrier film may comprise a combination of any two or more of cold water soluble film, hot water soluble film, non soluble hydrophilic film and non soluble non hydrophilic film.
- the security feature(s) may be incorporated in any one or more of the films making up the carrier film.
Landscapes
- Paper (AREA)
- Laminated Bodies (AREA)
- Credit Cards Or The Like (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SI200632208T SI1871952T1 (en) | 2005-03-22 | 2006-03-22 | High security paper and process of manufacture |
PL06766259T PL1871952T3 (en) | 2005-03-22 | 2006-03-22 | High security paper and process of manufacture |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IN312MU2005 | 2005-03-22 | ||
PCT/IN2006/000100 WO2006117804A2 (en) | 2005-03-22 | 2006-03-22 | High security paper and process of manufacture |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1871952A2 true EP1871952A2 (en) | 2008-01-02 |
EP1871952B1 EP1871952B1 (en) | 2017-09-13 |
Family
ID=37074621
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06766259.3A Active EP1871952B1 (en) | 2005-03-22 | 2006-03-22 | High security paper and process of manufacture |
Country Status (8)
Country | Link |
---|---|
US (1) | US20100193146A1 (en) |
EP (1) | EP1871952B1 (en) |
AP (1) | AP2007004187A0 (en) |
HU (1) | HUE034690T2 (en) |
PL (1) | PL1871952T3 (en) |
RU (1) | RU2409473C2 (en) |
SI (1) | SI1871952T1 (en) |
WO (1) | WO2006117804A2 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE602006014116D1 (en) | 2005-04-15 | 2010-06-17 | Arrow Coated Products Ltd | SELF-DAMAGING, IRREVERSIBLE SAFETY PACKING FOIL |
US8673236B2 (en) | 2006-05-25 | 2014-03-18 | Arrow Coated Products, Ltd. | Water soluble film based matrix to collect samples extracted from living species |
EP3360927B1 (en) | 2009-06-26 | 2020-09-09 | CJ CheilJedang Corporation | Pha compositions comprising pbs and pbsa and method for producing the compositions |
CN102589262B (en) * | 2011-12-28 | 2014-04-02 | 浙江工贸职业技术学院 | Paper money drying device, paper money sterilizer and paper money processing method |
US9353258B2 (en) | 2012-06-05 | 2016-05-31 | Metabolix, Inc. | Low glass transition polyhydroxyalkanoates for modification of biodegradable polymers |
IN2012MU02939A (en) * | 2013-04-08 | 2015-07-10 | Shilpan Pravinchandra Patel | |
DE102013014309A1 (en) * | 2013-08-29 | 2015-03-05 | Bundesdruckerei Gmbh | Datasheet for a security and / or value document |
EP3377579A1 (en) | 2015-11-17 | 2018-09-26 | CJ Cheiljedang Corporation | Polymer blends with controllable biodegradation rates |
US10391805B2 (en) | 2017-09-25 | 2019-08-27 | International Business Machines Corporation | Electrical component assembly on flexible materials |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1748360A (en) * | 1926-04-16 | 1930-02-25 | Paper & Textile Machinery Co | Manufacture of reenforced paper and the like |
US1731754A (en) * | 1928-05-11 | 1929-10-15 | Dispersions Process Inc | Artificial leather sheeting and method of making the same |
US1887143A (en) * | 1930-04-05 | 1932-11-08 | William A N Spencer | Paper making apparatus |
US3867252A (en) * | 1966-04-20 | 1975-02-18 | Michal Skrabak | Twin-wire multi-ply paper making machine |
DE2919649A1 (en) * | 1979-05-16 | 1980-11-20 | Bbc Brown Boveri & Cie | SECURITY PAPER |
US4552617A (en) * | 1984-06-13 | 1985-11-12 | Crane & Co. | Security features in paper |
DE4036637A1 (en) * | 1990-11-16 | 1992-05-21 | Gao Ges Automation Org | SECURITIES AND METHOD FOR THE PRODUCTION THEREOF |
DE19809085A1 (en) * | 1998-02-25 | 1999-08-26 | Paugstadt | Visible anti-forgery protection system |
DE19829004A1 (en) * | 1998-06-30 | 2000-01-05 | Giesecke & Devrient Gmbh | Security paper |
US20040253434A1 (en) * | 2001-10-09 | 2004-12-16 | Patel Shilpan Pravinchandra | Method of manufacturing embedded water soluble film carrier |
EP1599346B2 (en) * | 2003-02-27 | 2018-02-21 | Landqart AG | Multiple layer laminate |
ES2339369T3 (en) * | 2004-12-23 | 2010-05-19 | Landqart | MULTI-PAPER STRUCTURE AS PRINT SUBSTRATE AS WELL AS PROCEDURE FOR MANUFACTURING. |
-
2006
- 2006-03-22 WO PCT/IN2006/000100 patent/WO2006117804A2/en active Application Filing
- 2006-03-22 EP EP06766259.3A patent/EP1871952B1/en active Active
- 2006-03-22 RU RU2007135130/12A patent/RU2409473C2/en not_active IP Right Cessation
- 2006-03-22 SI SI200632208T patent/SI1871952T1/en unknown
- 2006-03-22 HU HUE06766259A patent/HUE034690T2/en unknown
- 2006-03-22 PL PL06766259T patent/PL1871952T3/en unknown
- 2006-03-22 US US11/886,990 patent/US20100193146A1/en not_active Abandoned
- 2006-03-22 AP AP2007004187A patent/AP2007004187A0/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO2006117804A2 * |
Also Published As
Publication number | Publication date |
---|---|
PL1871952T3 (en) | 2018-02-28 |
RU2007135130A (en) | 2009-04-27 |
AP2007004187A0 (en) | 2007-10-31 |
US20100193146A1 (en) | 2010-08-05 |
EP1871952B1 (en) | 2017-09-13 |
WO2006117804A2 (en) | 2006-11-09 |
RU2409473C2 (en) | 2011-01-20 |
WO2006117804A3 (en) | 2007-01-11 |
WO2006117804B1 (en) | 2007-02-22 |
HUE034690T2 (en) | 2018-02-28 |
SI1871952T1 (en) | 2017-12-29 |
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