EP2689068A1 - Informationsmedium oder papier mit einem selbstreparierenden material - Google Patents
Informationsmedium oder papier mit einem selbstreparierenden materialInfo
- Publication number
- EP2689068A1 EP2689068A1 EP12712756.1A EP12712756A EP2689068A1 EP 2689068 A1 EP2689068 A1 EP 2689068A1 EP 12712756 A EP12712756 A EP 12712756A EP 2689068 A1 EP2689068 A1 EP 2689068A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- self
- document
- repairing material
- substrate
- paper according
- 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
- 239000000463 material Substances 0.000 title claims abstract description 119
- 239000000758 substrate Substances 0.000 claims abstract description 101
- 229920000642 polymer Polymers 0.000 claims description 38
- 238000000576 coating method Methods 0.000 claims description 35
- 239000011248 coating agent Substances 0.000 claims description 34
- 230000004888 barrier function Effects 0.000 claims description 29
- 238000004519 manufacturing process Methods 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 19
- 230000002441 reversible effect Effects 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 239000000835 fiber Substances 0.000 claims description 10
- 230000015572 biosynthetic process Effects 0.000 claims description 8
- 230000002427 irreversible effect Effects 0.000 claims description 8
- 230000002209 hydrophobic effect Effects 0.000 claims description 6
- 229920000554 ionomer Polymers 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 239000002657 fibrous material Substances 0.000 claims 1
- 230000000149 penetrating effect Effects 0.000 claims 1
- 239000012815 thermoplastic material Substances 0.000 claims 1
- 239000010410 layer Substances 0.000 description 68
- 239000000123 paper Substances 0.000 description 34
- 239000004814 polyurethane Substances 0.000 description 21
- 229920002635 polyurethane Polymers 0.000 description 20
- 238000012360 testing method Methods 0.000 description 20
- 239000000203 mixture Substances 0.000 description 17
- 239000004372 Polyvinyl alcohol Substances 0.000 description 16
- 230000015556 catabolic process Effects 0.000 description 16
- 238000006731 degradation reaction Methods 0.000 description 16
- 229920002451 polyvinyl alcohol Polymers 0.000 description 16
- 238000005470 impregnation Methods 0.000 description 15
- 150000001875 compounds Chemical class 0.000 description 11
- 239000006185 dispersion Substances 0.000 description 11
- 230000016571 aggressive behavior Effects 0.000 description 10
- 239000011230 binding agent Substances 0.000 description 10
- 230000008569 process Effects 0.000 description 9
- 230000008439 repair process Effects 0.000 description 9
- 238000000151 deposition Methods 0.000 description 8
- 230000037303 wrinkles Effects 0.000 description 8
- 238000004513 sizing Methods 0.000 description 7
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- 239000011159 matrix material Substances 0.000 description 6
- 238000007639 printing Methods 0.000 description 6
- 239000011253 protective coating Substances 0.000 description 6
- 238000005698 Diels-Alder reaction Methods 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 230000009471 action Effects 0.000 description 5
- 239000012792 core layer Substances 0.000 description 5
- 150000001993 dienes Chemical class 0.000 description 5
- 239000000945 filler Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 239000012209 synthetic fiber Substances 0.000 description 5
- 229920002994 synthetic fiber Polymers 0.000 description 5
- 206010001488 Aggression Diseases 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 4
- 239000000806 elastomer Substances 0.000 description 4
- 230000003993 interaction Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000003094 microcapsule Substances 0.000 description 4
- 239000012764 mineral filler Substances 0.000 description 4
- -1 polyethylene Polymers 0.000 description 4
- 238000011282 treatment Methods 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 238000007598 dipping method Methods 0.000 description 3
- 238000007646 gravure printing Methods 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 229920002873 Polyethylenimine Polymers 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 239000005035 Surlyn® Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 239000002671 adjuvant Substances 0.000 description 2
- 235000012211 aluminium silicate Nutrition 0.000 description 2
- 239000008346 aqueous phase Substances 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000008119 colloidal silica Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000000536 complexating effect Effects 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 239000003431 cross linking reagent Substances 0.000 description 2
- ZSWFCLXCOIISFI-UHFFFAOYSA-N cyclopentadiene Chemical compound C1C=CC=C1 ZSWFCLXCOIISFI-UHFFFAOYSA-N 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 230000009477 glass transition Effects 0.000 description 2
- 150000004676 glycans Chemical class 0.000 description 2
- DCAYPVUWAIABOU-UHFFFAOYSA-N hexadecane Chemical compound CCCCCCCCCCCCCCCC DCAYPVUWAIABOU-UHFFFAOYSA-N 0.000 description 2
- 150000002430 hydrocarbons Chemical group 0.000 description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005649 metathesis reaction Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- AHHWIHXENZJRFG-UHFFFAOYSA-N oxetane Chemical compound C1COC1 AHHWIHXENZJRFG-UHFFFAOYSA-N 0.000 description 2
- 239000011087 paperboard Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- HECLRDQVFMWTQS-RGOKHQFPSA-N 1755-01-7 Chemical compound C1[C@H]2[C@@H]3CC=C[C@@H]3[C@@H]1C=C2 HECLRDQVFMWTQS-RGOKHQFPSA-N 0.000 description 1
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 229920001661 Chitosan Polymers 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical group C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229920006397 acrylic thermoplastic Polymers 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 238000007754 air knife coating Methods 0.000 description 1
- 150000001412 amines Chemical group 0.000 description 1
- 230000003373 anti-fouling effect Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 150000001541 aziridines Chemical class 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- PNPBGYBHLCEVMK-UHFFFAOYSA-N benzylidene(dichloro)ruthenium;tricyclohexylphosphanium Chemical compound Cl[Ru](Cl)=CC1=CC=CC=C1.C1CCCCC1[PH+](C1CCCCC1)C1CCCCC1.C1CCCCC1[PH+](C1CCCCC1)C1CCCCC1 PNPBGYBHLCEVMK-UHFFFAOYSA-N 0.000 description 1
- 239000003139 biocide Substances 0.000 description 1
- 238000006664 bond formation reaction Methods 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 150000001718 carbodiimides Chemical class 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
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- 238000002144 chemical decomposition reaction Methods 0.000 description 1
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- 238000007906 compression Methods 0.000 description 1
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- 230000001143 conditioned effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
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- 230000001186 cumulative effect Effects 0.000 description 1
- 238000007766 curtain coating Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- NZZFYRREKKOMAT-UHFFFAOYSA-N diiodomethane Chemical compound ICI NZZFYRREKKOMAT-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 230000009881 electrostatic interaction Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000007888 film coating Substances 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 210000005224 forefinger Anatomy 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000011984 grubbs catalyst Substances 0.000 description 1
- 210000004247 hand Anatomy 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012510 hollow fiber Substances 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
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- 229920000831 ionic polymer Polymers 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 239000003446 ligand Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 125000005439 maleimidyl group Chemical group C1(C=CC(N1*)=O)=O 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000386 microscopy Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
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- 238000000465 moulding Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
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- 238000010422 painting Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 230000010399 physical interaction Effects 0.000 description 1
- 239000006223 plastic coating Substances 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
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- 239000005017 polysaccharide Substances 0.000 description 1
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- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920003009 polyurethane dispersion Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000008521 reorganization Effects 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 230000002940 repellent Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000025600 response to UV Effects 0.000 description 1
- 230000008458 response to injury Effects 0.000 description 1
- 238000007142 ring opening reaction Methods 0.000 description 1
- 238000004439 roughness measurement Methods 0.000 description 1
- 238000004626 scanning electron microscopy Methods 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 229920006299 self-healing polymer Polymers 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- ISXSCDLOGDJUNJ-UHFFFAOYSA-N tert-butyl prop-2-enoate Chemical compound CC(C)(C)OC(=O)C=C ISXSCDLOGDJUNJ-UHFFFAOYSA-N 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 210000003813 thumb Anatomy 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- 239000002023 wood Substances 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
- D21H21/18—Reinforcing agents
-
- 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
- D21H19/00—Coated paper; Coating material
- D21H19/80—Paper comprising more than one coating
- D21H19/82—Paper comprising more than one coating superposed
-
- 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
- D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
- D21H25/18—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00 of old paper as in books, documents, e.g. restoring
-
- 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
-
- 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
- D21H21/16—Sizing or water-repelling agents
Definitions
- the present invention relates to information carriers, in particular intended to be handled frequently, and more particularly but not exclusively supports comprising a substrate, in particular fibrous, and for example intended for the manufacture of security or valuable documents such as banknotes bank and the processes for making such papers and documents.
- the fibrous substrate is protected by one or more layers of a protective coating that also has a barrier effect against soiling.
- soiling is meant in particular aqueous or oleaginous liquids, or even sub-millimeter particles, and mixtures thereof.
- Physical degradations especially due to wrinkling, folding or pulling, of a substrate such as paper used for the manufacture of banknotes, cause a structural change of the substrate.
- An information carrier subject to these degradations undergoes a weakening of the surface of the information medium, for example a coating covering the substrate.
- a fibrous substrate subjected to these degradations repeatedly undergoes a process of destructuring which is characterized in particular by untying the fibers of the substrate. There is then a significant increase in the thickness of the paper but also its porosity, which facilitates the penetration and grip of dirt.
- Treatments based on film-forming polymers for example polyvinyl alcohol (PVA) and / or polyurethane (PU), as described in publications EP 1 319 104 or EP 0 514 455, make it possible, among other things, to reduce the effects these degradations on the porosity of the fibrous substrate and thus increase the durability of the paper.
- PVA polyvinyl alcohol
- PU polyurethane
- the choice of the protective coating is complex because it must provide both a barrier function and not unduly affect the printability of the paper during the manufacture of the notes.
- Patent EP 514 455 B1 thus discloses improving the circulation resistance of bank notes by impregnating the fibrous substrate, before printing, with a composition which contains one or more binders chosen for their mechanical characteristics.
- At least one of the faces of the fibrous substrate is treated with a composition comprising one or more fillers chosen from mineral fillers and / or plastic coating pigments, and at least one elastomeric binder in an amount greater than 25. parts per 100 parts by weight of dry weight.
- the elastomeric binder can be chosen from the group formed by aqueous dispersions of polyurethane, acrylate copolymer, optionally carboxylated styrene-butadiene copolymer, polymers of which one of the monomers is acrylonitrile or isoprene or neoprene, or their mixtures.
- a polyurethane is used.
- the filler is preferably mineral, selected from silicas or kaolin.
- WO 96/28610 discloses applying a liquid polyurethane composition to a fibrous substrate to form a protective coating.
- the application US 2004/0023008 A1 discloses a security paper for the manufacture of banknotes.
- the paper comprises a fibrous substrate which is coated on at least one of its faces with a transparent or translucent protective layer comprising colloidal silica and at least one transparent or translucent elastomeric binder.
- the publication WO 2008/054580 A1 discloses a method for imparting to a fibrous substrate a resistance to moisture and soiling, comprising impregnating the substrate on two opposite sides with an aqueous composition comprising one or more thermoplastic resins.
- No. 1,499,235 discloses improving the resistance to circulation of a bank note by impregnating the fibrous substrate with a latex comprising a copolymer based on carboxylated styrene and butadiene.
- EP 815 321 B1 discloses a paper for the production of banknotes, in which an aqueous dispersion of polyurethane is deposited on the fibrous substrate, this polyurethane dispersion being free of charges and transparent.
- the invention meets this need with an information carrier, comprising at least one self-repairing material.
- self-repairing material it is necessary to understand a material, in particular a polymer, capable of itself or under the effect of an energy stimulus, for example mechanical, luminous and / or thermal, to restructure locally, in particular by structural reorganization of the material or by a chemical reaction, so as to reduce the effects of damage due to mechanical aggression.
- an energy stimulus for example mechanical, luminous and / or thermal
- the durability of the information carrier is improved.
- the invention makes it possible in particular to improve the resistance to mechanical stresses by a restructuring of the self-repairing material as soon as the degradations due to said stresses appear.
- the restructuring of the self-repairing material notably takes place on the surface of the information carrier or at least partially within the substrate in an area close to the surface of the substrate of said information carrier.
- the successive stresses experienced by the support according to the prior art result in successive and permanent degradations of the substrate, in particular the fibrous substrate, and of the protective coating, which will progressively lead to obtaining a non-zero porosity then to an increase in porosity, and therefore allow the penetration of soiling in the substrate of the information carrier and the attachment of dirt on the information carrier.
- the self-repairing material of a support according to the invention is restructured as soon as successive degradations appear which are therefore not permanent.
- the restructuring of the self-repairing material therefore prevents the cumulative effect of successive degradations on the porosity and tends to maintain a low or even zero porosity, despite the successive constraints experienced by the information carrier.
- said restructuring may tend to maintain hydrophobic and oleophobic properties of the information carrier.
- the repair enables the document to maintain zero porosity (0 mL / min according to ISO 5636-3) during its lifetime, and thus to avoid the insertion of dirt into the pores created by the successive mechanical stresses. as well as their grip on the successive degradations of the information medium, for example due to wrinkles.
- the self-repairing material can provide a protection of the surface of the document and the preservation of a flat surface appearance and clean, because the surface aggressions, including scratches, tend to disappear under the effect of the restructuring of the self-repairing material.
- the invention applies in particular to information carriers comprising a thermoplastic base material substrate, for example a sheet of Polyart ® sold by the company Arjobex.
- the substrate may include a core layer and at least one skin layer overlying the core layer, the core layer being further away from the surface than the skin layer.
- the core layer may contain voids as in the case of Polyart ® .
- the heart layer can be sandwiched between two layers of skin.
- the substrate may be as claimed in EP 0 470 760 B1 and EP 0 703 071 B1.
- the core layer may be polyethylene-based, stretched to generate voids.
- the skin layers can be coextruded with the heart layer.
- the invention applies more preferentially but not exclusively to supports comprising a substrate, preferably fibrous, such as banknotes and papers intended for their manufacture.
- the fibrous substrate preferably comprises cellulosic fibers.
- the self-repairing material in the case where the self-repairing material is located between the fibers of a fibrous substrate, the self-repairing material makes it possible to repair the degradations successively suffered by the substrate as soon as they appear.
- the self-repairing material spontaneously restructures so as to compensate for internal degradation of the fibrous substrate.
- the self-repairing material covers at least one face of the substrate and preferably its two faces.
- the substrate is advantageously sandwiched between two layers of self-repairing material.
- the coating of self-repairing material covering the substrate forms a layer at least partly superficial, in particular completely superficial, and self-repairs as soon as the successive degradations appear.
- Said successive degradations may in particular be ruptures, scratches, impacts or deterioration of the coating, and they are in particular due to creasing, bending or punctual impacts, or to abrasion phenomena.
- the information carrier according to the invention preferably comprises at least one coating of the self-repairing material in the form of a film covering the substrate.
- the substrate extends in an exemplary implementation between two films of the self-repairing material.
- the thickness of the latter is preferably between 1 ⁇ and 15 ⁇ , better 5 and 8 ⁇ .
- the self-repairing material in particular the coating of self-repairing material, penetrates, at least partially, into the substrate of the information medium, in particular in an area close to the surface.
- the self-repairing material may require an energy stimulus, especially mechanical, thermal and / or light, especially UV, to self-repair. It can also, depending on the choice made of the self-repairing material, self-repair without energy supply, at room temperature. For example, self-repair takes less than 30 minutes at room temperature (between 20 and 25 ° C).
- ambient temperature is meant in particular the average current temperature of the place of circulation and / or manufacture and / or storage of said substrate comprising the self-repairing material. This temperature is for example between 20 and 25 ° C.
- the subject of the invention is also a method of processing a used information carrier, in which an information carrier comprising a self-repairing material requiring an energy supply to self-repair is subjected to a stimulus. energetic so that it self-repairs.
- Stimulus exposure occurs, for example, in a sorting facility designed to eliminate documents that no longer have certain required traffic characteristics.
- the documents pass for example between heated rollers, are conditioned under appropriate temperature and / or humidity conditions, and / or are exposed to intense light, for example UV.
- the invention further relates to a method of manufacturing an information carrier, wherein a substrate, preferably fibrous, is coated with a self-repairing material.
- the method comprises for example the formation of a coating, in particular a homogeneous film or a surface layer, on both sides of the substrate from a solution based on a solvent or an aqueous dispersion of a polymer self-repairing, for example by an impregnation treatment, surfacing, sizing, coating, printing, depositing and / or coating, or complexation on both sides of the substrate with a film of a self-repairing polymer previously formed.
- the process can take place in line, at the output of a papermaking machine, or, alternatively, the fibrous substrate can be manufactured and stored, and subsequently unrolled and coated with self-healing material.
- a combination of the above-mentioned methods can be used to apply successive coatings.
- impregnation for example by means of a size press, followed by a coating, can be implemented.
- All of the above-mentioned coating forming methods can allow the formation of a homogeneous film or a surface layer which self-repairs as soon as the successive degradations appear, as previously described.
- the impregnation, surfacing or sizing processes applied to a fibrous substrate may allow the application of the self-repairing material at least in part within the fibrous substrate so as to compensate for the internal damage sustained by the support, as previously described.
- the amount of self-repairing material on or in the substrate is between 1 and 20 g / m 2 , preferably between 1 and 5 g / m 2 .
- the method may comprise steps of applying to the substrate at least one barrier layer and / or a printability layer, before or after the deposition of the self-repairing material.
- the self-repairing material is printable and / or has barrier properties, and in particular said self-repairing material is hydrophobic and / or oleophobic.
- the substrate is exposed to a composition for producing a barrier layer, it is coated with a layer of self-repairing material, then optionally deposited a printability layer on the layer of self-healing material.
- the substrate Before the application of the barrier layer or the self-repairing material, the substrate may be pretreated, for example by impregnation or pre-gluing so as to reduce the porosity, for example by a composition based on PVA or any other binder.
- All the layers, especially those of impregnation, pre-gluing, forming barrier and / or printability, of the information medium or the paper intended for the manufacture thereof can be applied according to the methods and by the tools conventionally used in the field of paper, including impregnating, surfacing, sizing, removal and / or coating.
- the barrier layer is preferably applied by impregnation or surfacing.
- the printability layer is preferably applied by surfacing, coating or coating.
- the layer of self-repairing material is applied in the fluid state, it is preferably applied by surfacing, coating, printing or coating.
- Self-healing materials are already known in other applications. These are mainly polymeric-based film coatings used for protection against external aggressions in the fields of automotive (body painting), electronics (protection of electrical sheath) or building (cement reinforcement).
- irreversible is meant a self-repair that can not effectively take place repeatedly on a targeted area of the substrate having undergone successive attacks. This phenomenon is preferably due to the depletion, during successive aggressions, of compounds involved in the self-repair process.
- the irreversible self-repairing materials involve a covalent chemical reaction and rely for example on the release, during a mechanical aggression such as a crack, of a compound which will cause a repair by reacting with another compound present locally. to restore the material.
- self-repairing material comprise, in a form dispersed in a matrix, microcapsules, carbon nanotubes, hollow fibers or microcavities containing a monomer-type active product for example. Distributed in the matrix of the composite, these microcapsules open under the action of an impact creating for example a crack and release the active product. The crack or defect is then usually filled by the polymerization or crosslinking product formed from the active product, following the contacting thereof with a catalyst also dispersed in the matrix.
- microcapsules containing a cyclopentadiene monomer may be dispersed in an epoxy matrix which otherwise contains the Grubbs catalyst as an initiator.
- This catalyst is likely to cause the metathesis of CDP, when that is released into the matrix in response to damage to the self-repairing material.
- the metathesis product fills the damage and thus makes it possible to reconstitute the material.
- a self-repairing system was recently developed using a compound derived from the coupling of a natural polysaccharide such as, for example, chitosan with an oxide ring such as oxetane, said compound being linked to a chain polyurethane.
- a natural polysaccharide such as, for example, chitosan
- an oxide ring such as oxetane
- the damage is caused an opening of the oxetane cycle thus creating two functional groups.
- the polysaccharide chain splits to form functional patterns that interact with the functions generated by ring opening, thus bridging the damage.
- the self-repairing material is of the reversible type, because with a self-repairing material of the irreversible type, the ability of the material to self-repair may decrease with time, since self-repair can result from chemical reactions that result in stable covalent bonds. In this case, over time, the formation capacity of these links decreases. It may, alternatively, there is a gradual depletion of active product within the matrix. For example, in the case of the use of microcapsules, their number decreases as and when external aggression.
- reversible self-repair is meant a self-repair which can efficiently take place repeatedly on a targeted area of the substrate having undergone successive aggressions, in particular spaced apart over time, the self-healing capacity being preferably substantially constant. for different successive attacks.
- reversible systems are generally based on the establishment of either covalent bonds, for example by Diels-Aider and retro Diels-Aider reactions, or non-covalent interactions (weak bonds) such as hydrogen bonds, ionic bonds, coordination bonds (metal-ligand type) or type interaction " ⁇ - ⁇ stacking".
- covalent bonds or non-covalent interactions can be triggered under the action of an energy source such as heat, irradiation, traction, compression or electrochemistry.
- the self-repairing material can implement a Diels-Aider reaction.
- the Diels-Aider reaction is the process in which a conjugated diene and a molecule with a double or triple bond, called a dienophile, react, in response to a stimulus, to form a six-membered ring with unsaturation, called Diels- Help.
- Diels- Help a conjugated diene and a molecule with a double or triple bond
- such a process can be reversible. For example, in response to a rise in temperature, the adduct can dissociate, thereby giving back the diene and the dienophile.
- a Diels-Alder reaction is not limited to fully carbon-based systems.
- This "self-repair" mode has been widely used for the preparation of self-repairing polymers via the introduction, at the ends of the polymer chain or on the monomeric units constituting it, with adequate chemical functions. ie reactive according to a Diels-Alder reaction.
- these functions can be represented on the one hand, a furan unit, representative of a conjugated diene, and on the other hand, a maleimide unit, representative of a dienophile, and both present on distinct polymer chains. forming the self-healing material.
- An inter-molecular Diel-Alder reaction is likely to occur between these two types of function. Other chemical reactions can be exploited according to this same scheme.
- compounds which are suitable for the formation of such materials may in particular be cited as elastomers interacting via supramolecular bonds, crosslinking elastomers via hydrogen bond formation, and more particularly mobile chain polymers and ionic thermoplastic polymers, also known as ionic polymers. mothers.
- some of these compounds in particular based on acrylic or urethane, have intrinsic antifouling properties, for example because of their hydrophobic or oleophobic nature.
- Ionomers are thermoplastic elastomers with ionic charges in their structure. More specifically, it is most often hydrocarbon chains carrying acid functions which are totally or partially neutralized by quaternary ammonium salts or metal. The charges thus created form ionic clusters which crosslink the hydrocarbon chains together by electrostatic interactions. During mechanical aggression, this crosslinking is damaged but can reform rapidly at room temperature due to the electrostatic attraction of the charged groups. US20100174041 describes an example of self-repairing material of this type.
- the mechanism of self-repair is based on a molecular diffusion of the mobile polymer chains attached to the main structure of this polymer. After diffusion of the mobile chains ⁇ self-repair is completed by chemical or physical interactions of the polymer with the mobile chains.
- a polymer with mobile chains may in particular be a polymer with a low glass transition temperature Tg, especially less than or equal to 20 ° C.
- the glass transition temperature Tg is measured according to the ISO 11357-2 standard.
- the movement of the chains ("flowability") of a low Tg polymer can facilitate the restructuring of the polymer after deterioration due to mechanical aggression. When the material is damaged, the chains have a great freedom of movement and tend to find their initial place. The time required for repair decreases with temperature. It should be noted that the movement of these chains can also be facilitated by the presence of repellent groups between them, for example fluorinated or silicone, on the main structure of the polymer.
- Polymers of this type belonging to the family of polyurethanes and acrylics may be suitable.
- JP2008239722; WO200769765; EPI 190424; US20020108774; KR20090109459 and WO9610595 disclose such materials.
- This type of compound is generally represented by elastomers forming a supramolecular network and associated by hydrogen bonds, weak and reversible. Once formed by molding or pressing, these supramolecular elastomers have low self-adhesive surfaces. On the other hand, the simple fact of putting in contact the surfaces of a fracture allows the material to repair itself and to recover its original mechanical properties.
- the repair is obtained via the establishment of supramolecular bonds, for example of the hydrogen bonding type or of the "stacking" type, via or without the migration of free monomers towards the interface of the two parts of the tear.
- supramolecular bonds for example of the hydrogen bonding type or of the "stacking" type
- polymers whose chemical structure favors supramolecular bonds for example polymers having amine functions to create hydrogen bonds
- a commercial example of this type of material is the Reverlink TM polymer from Arkema.
- the application CN 101671474 also describes an example of material of this type.
- the self-repairing material may comprise a polymer whose chemical structure favors the assembly in sheets by the aromatic rings via the doubles double bonds.
- these compounds although easy to use, nevertheless have the disadvantage of requiring a mechanical action, for example contacting the two faces of the tear or affixing a film. pressure to allow repair.
- the self-repairing material may comprise a polymer whose chemical structure favors the assembly in sheets by the aromatic rings via the doubles double bonds.
- An information carrier according to the invention or a paper intended for the manufacture of such a support preferably comprises a fibrous substrate.
- a substrate is flexible and would be, in the absence of self-repairing material, capable of destructuring, with generation of porosity, under the action of a wrinkling. The substrate is then called crumpled.
- the fibrous substrate according to the invention may be of natural or synthetic origin.
- the substrate may comprise cellulosic fibers, more preferably cotton, especially when it is intended for the production of banknotes.
- Other plant fibers of annual plants may enter the composition of the fibrous substrate.
- the fibrous substrate comprises, in addition to the paper fibers, any additives suitable for its manufacture.
- a fibrous substrate of mainly cellulosic nature may be reinforced by the addition of synthetic fibers.
- the substrate may thus comprise a mixture of cellulosic and synthetic fibers, with preferably less than 30% by mass of synthetic fibers, for example 75% by weight of cellulose and 25% by mass of synthetic fibers.
- the substrate may comprise adjuvants, for example retention agents, biocides, fillers and pigments, which are en masse or deposited by impregnation, and binders.
- adjuvants for example retention agents, biocides, fillers and pigments, which are en masse or deposited by impregnation, and binders.
- the substrate may undergo any surface treatment, especially a surface treatment, sizing, coating, coating, printing, deposition, extrusion, lamination (lamination) or impregnation.
- the treatment can be carried out by any suitable tool, impregnator, size press, squeegee coater, air knife coater, curtain coater, extruder, laminating press, gravure printing, screen printing ...
- the substrate may be exposed to various treatment solutions, and in particular to the application of an organic solution or an aqueous dispersion of the self-repairing material.
- An aqueous dispersion of the self-repairing material is preferred for better compatibility with paper processes.
- the fibrous substrate is pre-treated, especially by impregnation, surfacing or sizing, with a composition comprising a binder for reducing its porosity, preferably based on polyvinyl alcohol (PVA) as detailed below.
- PVA polyvinyl alcohol
- the fibrous substrate may have one or more jets of paper assembled in the wet state.
- the fibrous substrate may have, as finished and dry paper, a basis weight of between 30 and 180, preferably between 80 and 120 g / m 2 and a thickness of between 30 and 180, preferably between 80 and 120 ⁇ , before and / or after deposition of the self-repairing material.
- the document, and in particular the fibrous substrate may comprise one or more watermarks and possibly one or more other security elements.
- security elements that can be incorporated in the information carrier, and in particular in the paper intended for the manufacture of the support, certain are detectable by eye, daylight or artificial light, without the use of a particular device.
- These security elements comprise for example colored fibers or boards, fully or partially printed or metallized wires. These security elements are called first level.
- security elements are detectable only with a relatively simple device, such as a lamp emitting in the ultraviolet (UV) or infrared (IR).
- UV ultraviolet
- IR infrared
- These security elements comprise, for example, fibers, boards, strips, wires or particles. These security elements may be visible to the naked eye or not, being for example luminescent under a lighting of a Wood lamp emitting in a wavelength of 365 nm. These security elements are said to be second level.
- security elements require for their detection a more sophisticated detection device. These security elements are for example capable of generating a specific signal when they are subjected, simultaneously or not, to one or more external excitation sources. The automatic detection of the signal makes it possible to authenticate, if necessary, the information carrier.
- These security elements comprise, for example, tracers in the form of active materials, particles or fibers capable of generating a specific signal when these tracers are subjected to optronic, electrical, magnetic or electromagnetic excitation. These security elements are said to be third level.
- Reagents may also be incorporated in the information carrier, in particular in the paper intended for the manufacture of the support. These are, for example, chemical or biochemical tampering and / or authentication and / or identification reagents that may in particular react respectively with at least one forgery agent and / or authentication and / or identification.
- the security element (s) present in the information carrier, in particular paper intended for its manufacture may have first, second or third level security features.
- the information carrier may comprise additional layers covering the substrate, in particular fibrous.
- barrier layer If the "barrier" properties of the self-repairing material are insufficient, it is possible to apply a barrier layer (for example based on PVA, PU, etc.) between the substrate and the self-repairing material.
- the barrier layer is preferably, by the chemical structure of the polymer used for the production of this layer, at least hydrophobic and oleophobic and also flexible, and can facilitate the deposition of the self-repairing material.
- the barrier layer may comprise any polymer adapted to impart barrier properties to the coating to protect the fibrous substrate from soiling.
- the barrier layer is present, preferably, per face at 1 to 24 g / m 2 dry weight, more preferably 1 to 15 g / m 2 , more preferably 2 to 5 g / m 2 .
- the material used for the barrier layer and the amount of barrier layer make it possible to attain hydrophobic and / or oleophobic properties such as the contact angle of a drop, respectively of water, of hexadecane, diiodomethane, ethylene glycol and glycerol, measured with a Digidrop goniometer, in particular marketed by GBX is greater than 90 °, preferably greater than 100 °.
- the thickness per face of the barrier layer is, for example, from 1 to 24 ⁇ , more preferably from 1 to 15 ⁇ , and even more preferably from 2 to 7 ⁇ .
- the barrier layer is preferably deposited on each side in the liquid state by coating or impregnation, preferably in line on the paper machine, preferably with the aid of an impregnator.
- the barrier layer is initially, preferably, an aqueous phase preparation, in particular an emulsion or a dispersion.
- the barrier layer is preferably based on PU.
- an acrylic or styrenic polymer can be used.
- the fibrous substrate is pre-treated, for example by impregnation, surfacing or pre-sizing before coating, re-impregnation, surfacing, coating, extrusion, printing, deposition or complexing with the composition intended to form the substrate.
- barrier layer and / or the self-repairing material are examples of the materials listed above.
- the pretreatment is preferably carried out with a PVA-based binder and an insolubilizer, for example of the polycarbodiimide type.
- the polyvinyl alcohol is preferably dissolved in water at a level of from 1% to 10% by weight, more preferably from 3% to 6%, before impregnation of the paper substrate, and the insolubilizer is preferably dissolved at a level of from 0.05 to 1% by weight before impregnation of the paper substrate.
- Other binders may be envisaged in addition to or in substitution for PVA, such as dispersions based on styrenic or acrylic polymers.
- the pre-treatment is carried out so as to deposit a quantity of PVA of between 2 and 3.5 g / m 2 .
- an external printability layer may be applied to the layer of the self-repairing material.
- the information carrier may thus comprise an external printability layer, which advantageously comprises a filler, preferably a mineral filler, which makes it possible to improve the printability.
- a filler preferably a mineral filler
- the external printable layer is preferably transparent or translucent.
- the mineral filler advantageously comprises silica and / or kaolin and / or talc and / or calcium carbonate.
- the mineral filler is non-opacifying thanks to its natural transparency and / or its dimensions of the order of one micron, especially less than 10 ⁇ .
- the external printability layer comprises a filler of polymeric particles, preferably an organic one, for example a powder of polyethylene, of polyamide, of polypropylene, of an acrylic or styrenic polymer.
- the external printability layer may be deposited in contact with the self-repairing material or not.
- the deposition of the external printable layer preferably takes place on both sides of the substrate, covering the self-repairing material.
- any suitable coating system especially two-sided coating (C-2-S).
- an air knife coating system is used.
- the deposit may also be made, inter alia, by curtain coating, by pencil coating, by coating with rollers, in particular pre-coated, engraved or transfer, or by dipping, impregnation, surfacing, coating, by coating, gravure printing or spraying.
- the outer layer is initially, preferably, a preparation in aqueous phase, in particular an emulsion or a dispersion, for example.
- polyurethane is applied, preferably in the form of an aqueous dispersion of polyurethane or pro-polyurethane particles.
- the composition intended to form the outer layer may comprise a crosslinking agent chosen from isocyanates, carbodiimides or aziridines.
- the crosslinking agent may be in a mass content, by dry weight, of between 1 and 15%, better still 1 to 3%, relative to the total weight of the composition before coating.
- Example of external printability layer same PU formula as above.
- the self-repairing material is applied in a fluid form, in particular an aqueous dispersion or a solvent
- a fluid form in particular an aqueous dispersion or a solvent
- an in-line impregnator including in particular pre-dosing rollers, engraved rollers, transfer roll before dosing output.
- a double-sided coater with an air knife for example of the TWIN TM ABC type.
- simultaneous coating units for example of the TWIN ABC type, or roller type, for example TWIN Sizer Etching type or TWIN TM Sizer HSM can be envisaged to lay both sides in a single pass.
- each layer may be followed by drying, for example by hot air or infrared, possibly seconded by driving rollers.
- the surface temperature reached will be at least 30 ° C and at most 180 ° C, and this in relation to the residence time of the coated paper in the heating unit.
- the self-repairing material can also be applied in the form of film already formed by complexing on the substrate.
- Examples 1 to 3 below were prepared from a fibrous substrate composed of cellulosic and synthetic fibers, namely of polyamide for Example 1 and the comparative example and of polyester for Example 2, with proportions respective amounts of 75% and 25% by mass.
- the fibrous substrate contains conventional adjuvants.
- the fibrous substrate is glued at the exit of the paper forming tank by dipping in a bath of PVA and insolubilizer dissolved respectively at 3 and 0.25% by mass in water so as to deposit 2 g / m 2 of PVA in dry weight.
- a 30% aqueous dispersion of a polyurethane-type mobile chain self-repairing polymer obtained by a process such as for example described in the publication "Interdiffusion of dangling chains in” is applied to the paperboard substrate pre-treated with PVA above.
- weak gel and its application to self-repairing materials "by Masayuki Yamaguchi, Susumu Ono and Kenzo Okamoto (Materials Science and Engineering B, vol.162, year 2009, pages 189-194).
- the fibrous substrate is replaced by a plastic sheet of
- a barrier layer 17 of the same formulation as that given in Example 1 of patent EP 514 455, is applied by surfacing on the layer 12 of pre-treatment based on PVA.
- the layer of Reverlink TM self-healing material marketed by Arkema is deposited by gravure printing in an ethyl methyl ketone (MEK) solvent medium on the barrier layer 17 so as to obtain a layer of 5 g / m 2 per polymer polymer face. -réparant.
- MEK ethyl methyl ketone
- the layer 14 of self-repairing material is covered by an external printability layer 16 according to the PU formula described above.
- the wrinkle test gives a porosity after creasing of 0 mL / min.
- the substrate is a plastic sheet Polyart ®.
- the pre-bonded PVA papermaking substrate above is coated with a PU-based layer in an amount of 5 g / m 2 / face dry weight.
- the PU-based layer has the formulation of Example 2 of EP 1 319 104, with 39% by weight of polyurethane dry weight.
- the structure 10 illustrated in section is shown schematically and partially in FIG. 1, in which the substrate 11 covered with the pre-gluing layer 12 is protected by the barrier layer 13 based on PU.
- the wrinkle test gives 0 mL / min before wrinkling and 35 mL / min after.
- Bendtsen porosity is measured according to ISO 5636-3.
- the wrinkle test is used to determine the wrinkle resistance of papers such as banknote papers and wrapping paper.
- the device corresponds to that described by the NATIONAL OFFICE OF
- the apparatus comprises:
- a device for rolling the paper test specimen into a cylinder This device consists of a split sleeve inside which is placed a movable fork with two teeth.
- a cylindrical guide for maintaining inside and in vertical position the piston whose lower base rests at the end of a lever.
- the cylindrical guide is designed such that the tube can slide between this guide and the piston.
- the creasing force is adjusted by the weight position on the lever arm, so that the pressure on the piston is 10 kg / cm 2 ⁇ 0.1 kg / cm 2 .
- Sampling and conditioning of the specimens are done in accordance with standards NFQ 03-009 and NFQ 03-010.
- the specimens can be measured as such. Since the specimen is constantly handled, it is necessary, in order to avoid moisture exchange with the operator, that the operator wears gloves of a moisture-barrier material during the preparation of the specimens and the run the test.
- test pieces are cut using a template. The running direction is marked on each specimen.
- the tube held by the lid with one hand, is then placed in a vertical position on the piston.
- the wrinkling is performed by pressing on the lid until the end of the long arm of the lever is raised above its rest position. It is important that the pressure exerted is sufficient to lift the weight, but neither too strong nor too fast for the lever to come into abutment.
- One way to control the effort is to use both hands on each other to press the lid.
- the lid is open and the test piece is crumpled in the shape of a small accordion, and out of the tube. It is put flat by carefully straightening the hand: acting too abruptly could produce notches on the side that would lead to tearing of the specimen.
- the straightened specimen is presented again for rolling in front of the slot of the sleeve but rotated 90 ° with respect to the first introduction; the complete cycle is repeated.
- the air permeability of each specimen is measured before and after creasing using a BENDTSEN porosimeter according to ISO 5636-3.
- each specimen is straightened until it is reasonably flat. This can easily be done by holding between thumb and forefinger, the test piece by two opposite sides and then stretching it in three or four places. This operation is repeated by the other two sides; do this operation in all four times is usually sufficient to obtain a sufficiently flat specimen.
- each specimen is introduced between the jaws of the clamping device of a burst and applied for two seconds sufficient pressure to mark the paper. Porosity is measured by ensuring that the BENDTSEN porosimeter head is centered on the surface being squeezed.
- test pieces to be tested depends on the sample studied.
- the reproducibility of the test is such that a sample per sample sheet is sufficient.
- a reference information carrier according to the prior art and a support according to the invention may be subjected to folding, abrasion, traction or impact operations. As before, it is possible to wait for a certain time between the various operations to which the information media are subjected.
- the measurement can be carried out by measuring the porosity as described above, or by imaging, in particular by microscopy, in particular scanning electron microscopy, possibly coupled with an image processing method, in order to measure the deterioration of the document and the restructuring effect provided to the information carrier according to the invention by the self-repairing material.
- the document comprises a coating of the self-repairing material
- said measurement can be carried out by topography, for example by means of an Altisurf apparatus marketed by Altimed.
- Altisurf apparatus marketed by Altimed.
- FIG. 4 shows a bank note according to the invention. This note was made from a paper comprising a self-repairing material according to the invention.
- the bill has at least one impression 20, for example soft-cut.
- the bill also includes at least one security element 21, for example a security thread visible in windows.
- the invention applies to all types of information media, for example books, identity documents, identity cards, passports, residence permits, banknotes, paper or plastic, tickets, payment, access to sports or cultural events, playing cards, this list is not exhaustive.
Landscapes
- Laminated Bodies (AREA)
- Paper (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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FR1152294A FR2973049B1 (fr) | 2011-03-21 | 2011-03-21 | Support d'information ou papier comportant un materiau auto-reparant |
PCT/IB2012/051333 WO2012127418A1 (fr) | 2011-03-21 | 2012-03-20 | Support d'information ou papier comportant un matériau auto-réparant |
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EP2689068A1 true EP2689068A1 (de) | 2014-01-29 |
EP2689068B1 EP2689068B1 (de) | 2016-03-09 |
EP2689068B2 EP2689068B2 (de) | 2018-05-16 |
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EP12712756.1A Active EP2689068B2 (de) | 2011-03-21 | 2012-03-20 | Informationsmedium oder papier mit einem selbstreparierenden material |
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EP (1) | EP2689068B2 (de) |
ES (1) | ES2574828T5 (de) |
FR (1) | FR2973049B1 (de) |
WO (1) | WO2012127418A1 (de) |
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WO2015119688A2 (en) | 2013-11-18 | 2015-08-13 | University Of Florida Research Foundation, Inc. | Shape-memory-self-healing polymers (smshps) |
WO2016085662A1 (en) * | 2014-11-25 | 2016-06-02 | Albert Einstein College Of Medicine, Inc. | Btnl9 and ermap as novel inhibitors of the immune system for immunotherapies |
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US1499235A (en) | 1923-04-12 | 1924-06-24 | William C Livingston | Cheese cutter |
FR2647797B1 (fr) | 1989-06-05 | 1991-08-30 | Saint Gobain Vitrage | Procede pour la fabrication d'une couche de polyurethane autocicatrisable, et produit obtenu |
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2011
- 2011-03-21 FR FR1152294A patent/FR2973049B1/fr not_active Expired - Fee Related
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2012
- 2012-03-20 ES ES12712756.1T patent/ES2574828T5/es active Active
- 2012-03-20 EP EP12712756.1A patent/EP2689068B2/de active Active
- 2012-03-20 WO PCT/IB2012/051333 patent/WO2012127418A1/fr active Application Filing
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Also Published As
Publication number | Publication date |
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FR2973049B1 (fr) | 2016-12-23 |
ES2574828T3 (es) | 2016-06-22 |
FR2973049A1 (fr) | 2012-09-28 |
EP2689068B2 (de) | 2018-05-16 |
EP2689068B1 (de) | 2016-03-09 |
WO2012127418A1 (fr) | 2012-09-27 |
ES2574828T5 (es) | 2018-09-20 |
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