US20100193146A1 - High security paper and process of manufacture - Google Patents

High security paper and process of manufacture Download PDF

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Publication number
US20100193146A1
US20100193146A1 US11/886,990 US88699006A US2010193146A1 US 20100193146 A1 US20100193146 A1 US 20100193146A1 US 88699006 A US88699006 A US 88699006A US 2010193146 A1 US2010193146 A1 US 2010193146A1
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United States
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.)
Abandoned
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US11/886,990
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English (en)
Inventor
Shilpan Pravinchandra Patel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Arrow Coated Products Ltd
Original Assignee
Arrow Coated Products Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Arrow Coated Products Ltd filed Critical Arrow Coated Products Ltd
Assigned to ARROW COATED PRODUCTS LTD. reassignment ARROW COATED PRODUCTS LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: PATEL, SHILPAN PRAVINCHANDRA
Publication of US20100193146A1 publication Critical patent/US20100193146A1/en
Abandoned legal-status Critical Current

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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.
  • the invention addresses the need for delivering several types of security features at precise location with minimum costs.
  • 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° C. to 100° 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° C. to 40° C., preferably from 10° C. to 40° C., more preferably from 20° C. to 40° 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° C. to 100° C., preferably from 45° C. to 90° C., more preferably from 50° C. to 85° 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 alcohol, 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 alcohol, polyacrylamide, polymethacrylamide, polyacrylic acid, polymethacrylic acid, polyure
  • 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:
  • 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 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 non 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.
  • FIG. 1 shows a first process for the manufacture of high strength paper according to the invention
  • FIG. 2 shows a second process for the manufacture of high strength paper according to the invention.
  • the process of incorporating a polymeric film embedded/embossed/printed with security features into the paper during the paper making process by the cylinder mould method is as follows:
  • 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 at least 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° C. to 40° C., more preferably from 25° C. to 30° 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)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Credit Cards Or The Like (AREA)
US11/886,990 2005-03-22 2006-03-22 High security paper and process of manufacture Abandoned US20100193146A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IN312MU2005 2005-03-22
IN312/MUM/2005 2005-03-22
PCT/IN2006/000100 WO2006117804A2 (en) 2005-03-22 2006-03-22 High security paper and process of manufacture

Publications (1)

Publication Number Publication Date
US20100193146A1 true US20100193146A1 (en) 2010-08-05

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Family Applications (1)

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US11/886,990 Abandoned US20100193146A1 (en) 2005-03-22 2006-03-22 High security paper and process of manufacture

Country Status (8)

Country Link
US (1) US20100193146A1 (sl)
EP (1) EP1871952B1 (sl)
AP (1) AP2007004187A0 (sl)
HU (1) HUE034690T2 (sl)
PL (1) PL1871952T3 (sl)
RU (1) RU2409473C2 (sl)
SI (1) SI1871952T1 (sl)
WO (1) WO2006117804A2 (sl)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8524856B2 (en) 2009-06-26 2013-09-03 Metabolix, Inc. PHA compositions comprising PBS and PBSA and methods for their production
US10113060B2 (en) 2012-06-05 2018-10-30 Cj Cheiljedang Corporation Biobased rubber modified biodegradable polymer blends
US11091632B2 (en) 2015-11-17 2021-08-17 Cj Cheiljedang Corporation Polymer blends with controllable biodegradation rates
US11192343B2 (en) 2005-04-15 2021-12-07 Arrow Greentech Limited Self-destructive irreversible security packaging film

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007138614A1 (en) * 2006-05-25 2007-12-06 Arrow Coated Products Ltd A water soluble film based matrix to collect samples extracted from living species
CN102589262B (zh) * 2011-12-28 2014-04-02 浙江工贸职业技术学院 纸币烘干装置、纸币消毒机和纸币处理方法
IN2012MU02939A (sl) * 2013-04-08 2015-07-10 Shilpan Pravinchandra Patel
DE102013014309A1 (de) * 2013-08-29 2015-03-05 Bundesdruckerei Gmbh Datenblatt für ein Sicherheits- und/oder Wertdokument
US10391805B2 (en) 2017-09-25 2019-08-27 International Business Machines Corporation Electrical component assembly on flexible materials

Citations (6)

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US1731754A (en) * 1928-05-11 1929-10-15 Dispersions Process Inc Artificial leather sheeting and method of making the same
US1748360A (en) * 1926-04-16 1930-02-25 Paper & Textile Machinery Co Manufacture of reenforced paper and the like
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
US4552617A (en) * 1984-06-13 1985-11-12 Crane & Co. Security features in paper
US5567276A (en) * 1990-11-16 1996-10-22 Gao Gesellschaft Fuer Automation Und Organisation Mbh Paper of value and a method of producing it

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DE2919649A1 (de) * 1979-05-16 1980-11-20 Bbc Brown Boveri & Cie Sicherheitspapier
DE19809085A1 (de) * 1998-02-25 1999-08-26 Paugstadt Optisches Sicherheitsmerkmal und Verfahren zu dessen Herstellung
DE19829004A1 (de) * 1998-06-30 2000-01-05 Giesecke & Devrient Gmbh Sicherheitspapier
US20040253434A1 (en) * 2001-10-09 2004-12-16 Patel Shilpan Pravinchandra Method of manufacturing embedded water soluble film carrier
EP2000321B1 (de) * 2003-02-27 2013-07-17 Landqart Mehrschichtlaminat
WO2006066431A1 (de) * 2004-12-23 2006-06-29 Landqart Mehrschichtaufbau als drucksubstrat sowie verfahren zu dessen herstellung

Patent Citations (6)

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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
US4552617A (en) * 1984-06-13 1985-11-12 Crane & Co. Security features in paper
US5567276A (en) * 1990-11-16 1996-10-22 Gao Gesellschaft Fuer Automation Und Organisation Mbh Paper of value and a method of producing it

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11192343B2 (en) 2005-04-15 2021-12-07 Arrow Greentech Limited Self-destructive irreversible security packaging film
US8524856B2 (en) 2009-06-26 2013-09-03 Metabolix, Inc. PHA compositions comprising PBS and PBSA and methods for their production
US9056947B2 (en) 2009-06-26 2015-06-16 Metabolix, Inc. PHA compositions comprising PBS and PBSA and methods for their production
US9650513B2 (en) 2009-06-26 2017-05-16 Cj Cheiljedang Corporation PHA compositions comprising PBS and PBSA and methods for their production
US10113060B2 (en) 2012-06-05 2018-10-30 Cj Cheiljedang Corporation Biobased rubber modified biodegradable polymer blends
US11091632B2 (en) 2015-11-17 2021-08-17 Cj Cheiljedang Corporation Polymer blends with controllable biodegradation rates

Also Published As

Publication number Publication date
AP2007004187A0 (en) 2007-10-31
WO2006117804A2 (en) 2006-11-09
WO2006117804B1 (en) 2007-02-22
PL1871952T3 (pl) 2018-02-28
RU2007135130A (ru) 2009-04-27
EP1871952A2 (en) 2008-01-02
RU2409473C2 (ru) 2011-01-20
SI1871952T1 (sl) 2017-12-29
EP1871952B1 (en) 2017-09-13
HUE034690T2 (hu) 2018-02-28
WO2006117804A3 (en) 2007-01-11

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