EP4053333A1 - Transfer material for sublimation printing based on paper having barrier function against inks - Google Patents
Transfer material for sublimation printing based on paper having barrier function against inks Download PDFInfo
- Publication number
- EP4053333A1 EP4053333A1 EP21160232.1A EP21160232A EP4053333A1 EP 4053333 A1 EP4053333 A1 EP 4053333A1 EP 21160232 A EP21160232 A EP 21160232A EP 4053333 A1 EP4053333 A1 EP 4053333A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- transfer material
- paper
- material according
- weight
- ink
- 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 91
- 238000012546 transfer Methods 0.000 title claims abstract description 89
- 238000000859 sublimation Methods 0.000 title claims abstract description 22
- 230000008022 sublimation Effects 0.000 title claims abstract description 22
- 239000000976 ink Substances 0.000 title description 48
- 230000004888 barrier function Effects 0.000 title description 37
- 238000007639 printing Methods 0.000 title description 16
- 238000000034 method Methods 0.000 claims abstract description 41
- 239000004815 dispersion polymer Substances 0.000 claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 claims abstract description 25
- 229920000728 polyester Polymers 0.000 claims abstract description 19
- 239000000203 mixture Substances 0.000 claims abstract description 16
- 239000001913 cellulose Substances 0.000 claims abstract description 14
- 229920002678 cellulose Polymers 0.000 claims abstract description 14
- 238000001035 drying Methods 0.000 claims abstract description 14
- 238000005092 sublimation method Methods 0.000 claims abstract description 13
- 229920000058 polyacrylate Polymers 0.000 claims abstract description 11
- 229920000098 polyolefin Polymers 0.000 claims abstract description 10
- 238000007641 inkjet printing Methods 0.000 claims abstract description 7
- 239000000725 suspension Substances 0.000 claims abstract description 5
- 238000009499 grossing Methods 0.000 claims abstract description 4
- 239000000049 pigment Substances 0.000 claims description 22
- 230000008569 process Effects 0.000 claims description 19
- 230000035515 penetration Effects 0.000 claims description 12
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 9
- 230000002209 hydrophobic effect Effects 0.000 claims description 8
- 238000005470 impregnation Methods 0.000 claims description 8
- 229920002994 synthetic fiber Polymers 0.000 claims description 6
- 239000012209 synthetic fiber Substances 0.000 claims description 6
- 235000012211 aluminium silicate Nutrition 0.000 claims description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 4
- 239000005995 Aluminium silicate Substances 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 235000010210 aluminium Nutrition 0.000 claims description 3
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 3
- 239000000391 magnesium silicate Substances 0.000 claims description 3
- 235000012243 magnesium silicates Nutrition 0.000 claims description 3
- 125000005624 silicic acid group Chemical class 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- 235000010216 calcium carbonate Nutrition 0.000 claims description 2
- 239000000123 paper Substances 0.000 description 95
- 239000000975 dye Substances 0.000 description 31
- 239000011230 binding agent Substances 0.000 description 16
- 239000003795 chemical substances by application Substances 0.000 description 16
- -1 polyethylene Polymers 0.000 description 15
- 229920000800 acrylic rubber Polymers 0.000 description 10
- 239000000835 fiber Substances 0.000 description 10
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Natural products C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 9
- 239000004753 textile Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 239000002245 particle Substances 0.000 description 8
- 229920000642 polymer Polymers 0.000 description 7
- 229920001169 thermoplastic Polymers 0.000 description 7
- 239000004698 Polyethylene Substances 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 6
- 229920000573 polyethylene Polymers 0.000 description 6
- 229920002451 polyvinyl alcohol Polymers 0.000 description 6
- 238000004513 sizing Methods 0.000 description 6
- 229920002472 Starch Polymers 0.000 description 5
- 239000000654 additive Substances 0.000 description 5
- 239000000945 filler Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 239000008107 starch Substances 0.000 description 5
- 235000019698 starch Nutrition 0.000 description 5
- 239000004416 thermosoftening plastic Substances 0.000 description 5
- 239000004372 Polyvinyl alcohol Substances 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 4
- 125000002091 cationic group Chemical group 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 229920003043 Cellulose fiber Polymers 0.000 description 3
- 244000166124 Eucalyptus globulus Species 0.000 description 3
- 125000000217 alkyl group Chemical group 0.000 description 3
- 239000012876 carrier material Substances 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 235000014113 dietary fatty acids Nutrition 0.000 description 3
- 239000000194 fatty acid Substances 0.000 description 3
- 229930195729 fatty acid Natural products 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 206010013786 Dry skin Diseases 0.000 description 2
- 229920000881 Modified starch Polymers 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 125000000129 anionic group Chemical group 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 239000008199 coating composition Substances 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 238000007766 curtain coating Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 235000019426 modified starch Nutrition 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000000454 talc Substances 0.000 description 2
- 229910052623 talc Inorganic materials 0.000 description 2
- 238000010023 transfer printing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000000080 wetting agent Substances 0.000 description 2
- NECRQCBKTGZNMH-UHFFFAOYSA-N 3,5-dimethylhex-1-yn-3-ol Chemical compound CC(C)CC(C)(O)C#C NECRQCBKTGZNMH-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical class [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 229920001353 Dextrin Polymers 0.000 description 1
- 239000004375 Dextrin Substances 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 241000294754 Macroptilium atropurpureum Species 0.000 description 1
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- 240000003433 Miscanthus floridulus Species 0.000 description 1
- 239000004368 Modified starch Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 229920002367 Polyisobutene Polymers 0.000 description 1
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 125000003342 alkenyl group Chemical group 0.000 description 1
- 125000005250 alkyl acrylate group Chemical group 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 230000004087 circulation Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 235000019425 dextrin Nutrition 0.000 description 1
- WMWXXXSCZVGQAR-UHFFFAOYSA-N dialuminum;oxygen(2-);hydrate Chemical class O.[O-2].[O-2].[O-2].[Al+3].[Al+3] WMWXXXSCZVGQAR-UHFFFAOYSA-N 0.000 description 1
- 239000000539 dimer Substances 0.000 description 1
- 238000010017 direct printing Methods 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000011121 hardwood Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 239000001023 inorganic pigment Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000004579 marble Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 235000013808 oxidized starch Nutrition 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 1
- 229920000747 poly(lactic acid) Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920001748 polybutylene Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 239000011112 polyethylene naphthalate Substances 0.000 description 1
- 229920000306 polymethylpentene Polymers 0.000 description 1
- 239000011116 polymethylpentene Substances 0.000 description 1
- 229920002215 polytrimethylene terephthalate Polymers 0.000 description 1
- 229920003009 polyurethane dispersion Polymers 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 229940088417 precipitated calcium carbonate Drugs 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000011122 softwood Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229940014800 succinic anhydride Drugs 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
- D06P5/003—Transfer printing
- D06P5/004—Transfer printing using subliming dyes
-
- 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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/37—Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/025—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
- B41M5/0256—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet the transferable ink pattern being obtained by means of a computer driven printer, e.g. an ink jet or laser printer, or by electrographic means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/025—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
- B41M5/035—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet by sublimation or volatilisation of pre-printed design, e.g. sublistatic
- B41M5/0355—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet by sublimation or volatilisation of pre-printed design, e.g. sublistatic characterised by the macromolecular coating or impregnation used to obtain dye receptive properties
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/52—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing synthetic macromolecular substances
- D06P1/5207—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- D06P1/5214—Polymers of unsaturated compounds containing no COOH groups or functional derivatives thereof
- D06P1/5228—Polyalkenyl alcohols, e.g. PVA
-
- 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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/35—Polyalkenes, e.g. polystyrene
-
- 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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/41—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups
- D21H17/44—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups cationic
-
- 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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/53—Polyethers; Polyesters
-
- 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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/54—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
- D21H17/56—Polyamines; Polyimines; Polyester-imides
-
- 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
- D21H19/36—Coatings with pigments
- D21H19/38—Coatings with pigments characterised by the pigments
- D21H19/385—Oxides, hydroxides or carbonates
-
- 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
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H19/60—Polyalkenylalcohols; Polyalkenylethers; Polyalkenylesters
-
- 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
- D21H19/822—Paper comprising more than one coating superposed two superposed coatings, both being pigmented
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
- B41M2205/02—Dye diffusion thermal transfer printing (D2T2)
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
- D06P3/34—Material containing ester groups
- D06P3/52—Polyesters
-
- 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
- D21H19/36—Coatings with pigments
- D21H19/38—Coatings with pigments characterised by the pigments
- D21H19/40—Coatings with pigments characterised by the pigments siliceous, e.g. clays
Definitions
- the invention relates to a transfer material for the dye sublimation process and a process for its production.
- the invention also relates to a method for transferring an inkjet print image from the transfer paper according to the invention to a receiving material.
- transfer printing methods are available in which a flexible sheet-like transfer material is first printed and the printed image is transferred from this to the object to be printed.
- a special embodiment of such a transfer printing process is the dye sublimation process, which is used, for example, in B. Thompson: Printing Materials - Science and Technology (1998) at page 468 is described.
- the image to be printed is applied to the transfer material using printing inks, which are evaporated under the action of heat after the print has dried and are deposited again image-wise from the gas phase on the material to be finally printed.
- the sublimation colors can advantageously be applied to the transfer material by digital printing, in particular the inkjet printing process, which enables individual and personalized prints, for example on textiles.
- Printing inks for the inkjet printing process with dyes that can be transferred to the final print medium by sublimation are, for example, in DE 102 46 209 A1 described.
- Customary transfer materials onto which the print image to be transferred is printed using inkjet printing technology, comprise a carrier, for example a base paper, which is coated with an ink-receiving layer.
- a transfer material suitable for the dye sublimation process should, on the one hand, enable good absorption of the ink liquid when printing with the image to be transferred, otherwise the sharpness of the print will suffer, and on the other hand, the loss of sublimable dye when transferring the printed image to the image to be printed should be as small as possible material occur.
- a loss of sublimable dye through penetration into the interior of the paper and onto the surfaces of the transfer presses, so-called ink strikethrough should be completely prevented during the transfer of the print image from the transfer material to the material to be printed.
- the transfer materials for sublimation printing that have been used on the market so far can basically be divided into two groups.
- On the one hand there is the group of transfer materials in which film-forming binders are used in the color receiving layer and which already have a certain barrier function against ink strike-through due to the film-forming binders.
- microporous ink-receiving layers are used, which predominantly use non-film-forming binders in the ink-receiving layer.
- ink strikethrough is prevented by applying at least one barrier layer to the back of the support or between the support and the ink-receiving layer.
- Another problem in use is the significant deterioration in the curl properties (undesirable rolling up of the paper) when a barrier layer is applied.
- EP 1 101 682 A1 describes a coated paper that has low air permeability on the side to be printed. This is intended to prevent some of the sublimable dyes from penetrating into the porous paper interior of the carrier during the sublimation transfer step and thus being lost for transfer to the material to be finally printed.
- such papers with a low porosity on the side to be printed only absorb the inkjet ink very slowly and, especially with high levels of porosity Printing speeds, slow drying and running of the ink on the surface and thus unsatisfactory print sharpness.
- EP 1 878 829 A1 describes transfer materials with swellable, non-porous color receiving layers.
- the EP 1 878 829 A1 describes that the use of synthetic polymers such as polyethylene (PE), polyester (PES), polyacrylates and other synthetic thermoplastic polymers as an additional coating on the backing paper leads to a deterioration in the quality properties of the print image transferred by the dye sublimation process to the material to be printed would, since these polymers have a disadvantageous high color retention and thus lead to a lower transfer rate of the dye.
- EP 3 302 991 A2 also describes a porous ink-receiving layer with a small amount of binder and inorganic fillers, which is distinguished by good ink absorption and print quality.
- barrier layers are described on the back of the transfer material or between the carrier paper and the dye-receiving layer.
- the curling property of the backing paper increases, which is problematic in further processing.
- a barrier layer applied to the back can lead to stickiness of the back and associated to an undesirable Adhesion of the transfer material to the surfaces of the transfer presses when used in the dye sublimation process.
- thermoplastic particles with a melting point of 35° C. to 150° C. and an average particle size of 0.3 to 5 ⁇ m in the color receiving layer.
- the thermoplastic particles are intended to optimize the adhesion of the printed color receiving layer on the front side of the thermal transfer material when the printed image is transferred to flat textiles using the dye sublimation process.
- the color receiving layer DE 10 2014 116550 A1 has a binder content of 55 to 80% atro and can also contain pigments. With this proportion of binder in the dye-receiving layer, even in the presence of pigments, there is a closed film-like layer that is not porous.
- the invention is based on the object of providing a transfer material for the dye sublimation process which allows no or only very little penetration of sublimable dyes through the carrier of the transfer material which the known problems of the transfer materials of the prior art do not occur.
- a transfer material for the dye sublimation process comprising a carrier paper which is coated on one side with a dye receiving layer, the carrier paper containing at least 1.5% by weight, based on the dry weight of the cellulose, of a polymer dispersion selected from Group consisting of polyacrylates, polyesters, polyolefins or mixtures thereof.
- the polymer dispersion in the base paper of the transfer material according to the invention appears to form a barrier to the sublimable dye inks without the need for complete closure of the base paper by means of an additional barrier layer.
- the barrier effect seems to be based on sorption processes between the sublimable dyes and the specific polymers.
- the transfer material according to the invention has the disadvantages associated with the application of this barrier layer, such as stickiness, impaired curl properties and insufficient porosity of the color receiving layer and the associated slow drying and running of the Ink on the surface and unsatisfactory print sharpness, not on.
- the transfer material according to the invention comprises a carrier paper.
- the carrier paper is preferably an uncoated or surface-sized paper.
- the backing paper can contain sizing agents such as Alkylkentene dimers, fatty acids and/or fatty acid salts, epoxidized fatty acid amides, alkenyl or alkyl succinic anhydride, starch, tree resins, wet strength agents such as polyamine-polyamide-epichlorohydrin, dry strength agents such as anionic, cationic or amphoteric polyamides, optical brighteners, pigments, dyes, defoamers and others in the paper industry known chemical additives.
- sizing agents such as Alkylkentene dimers, fatty acids and/or fatty acid salts, epoxidized fatty acid amides, alkenyl or alkyl succinic anhydride, starch, tree resins, wet strength agents such as polyamine-polyamide-epichlorohydrin, dry strength agents such as anionic, cationic or amphoteric polyamide
- sizing agents are used in an addition amount of 0.2% or less, wet strength agents in an addition amount of 0.5% or less, and dry strength agents in an addition amount of 1.0% or less.
- the amounts added are dosed as small as possible in order to avoid costs and unnecessary and uncontrolled multiple circulations of the agent in the material cycle.
- the backing paper can be surface sized. Sizing agents suitable for this are, for example, polyvinyl alcohol or starch dextrins or modified starches such as oxidized starches or starch ethers.
- the backing paper can be produced on a fourdrinier machine with or without a top wire.
- the basis weight of the carrier paper can be 30 to 200 g/m 2 , in particular 40 to 120 g/m 2 .
- the backing paper can be used in uncompressed or compressed (smoothed) form. Backing papers with a density of 0.6 to 1.05 g/cm 3 are particularly suitable; in particular 0.70 to 0.9 g/cm 3 .
- the smoothing can be done in the usual way with a calendering.
- the cellulose for the production of the backing paper is preferably a eucalyptus cellulose with a fiber content of less than 200 ⁇ m after beating of 10 to 35% by weight and an average fiber length of 0.5 to 0.75 mm. It has been shown that the use of pulp with a limited proportion of fibers smaller than 200 ⁇ m reduces the loss of stiffness that occurs when using filler.
- Hardwood pulps (NBHK - Northern Bleached Hardwood Kraft Pulp) and softwood pulps can also be used.
- the backing paper contains at least 1.5% by weight, based on the mass of the pulp, of a polymer dispersion selected from the group consisting of polyacrylates, polyesters, polyolefins or mixtures thereof (hereinafter also polymer dispersion according to the invention).
- the use of at least 1.5% by weight of the polymer dispersion according to the invention surprisingly leads to a significant improvement in the barrier properties of the transfer material without an additional barrier layer being required, as is the case in the prior art.
- the amounts used according to the invention of the polymer dispersion are significantly above the amounts used of customary polymer dispersions used in the production of a backing paper, such as sizing agents, wet strength agents or dry strength agents.
- the polyacrylates used according to the invention are, for example, styrene-alkyl acrylate copolymers or methyl methacrylate.
- the alkyl in the styrene-alkyl acrylate copolymer is preferably methyl, ethyl, propyl, butyl and/or hexyl.
- the alkyl in the styrene-alkyl acrylate copolymer is ethyl or butyl.
- Copolymers can be used as mixtures of the above alkyl groups in the alkyl acrylate portion of the styrene-alkyl acrylate copolymer.
- polyesters used according to the invention are preferably selected from the group consisting of polybutylene terephthalate, polyethylene terephthalate, polylactide, polytrimethylene terephthalate, polyethylene naphthalate, polycarbonate, polyester carbonate.
- polyolefins that can be used are polyethylene, polybutylene, polymethylpentene and polyisobutylene .
- the carrier paper contains at least 2% by weight, in particular at least 2.5% by weight, preferably at least 3% by weight, based on the mass of the pulp, of a polymer dispersion according to the invention. It has been found that such a transfer material has a further improved barrier effect, so that with such a transfer material there is again a significant reduction in ink strikethrough. It has proven to be particularly practical if the polymer dispersion is distributed uniformly within the thickness of the backing paper. This ensures a particularly high degree of a constant barrier effect over the entire surface of the carrier material.
- proportions of other natural or synthetic fibers can also be used to produce the backing paper.
- the proportion of other fibers in the total fiber mass is preferably below 40% by weight, with proportions of other fibers being below 20% by weight being particularly preferred.
- the carrier paper contains at least 5% by weight, in particular between 5 and 20% by weight, very particularly preferably between 8 and 15% by weight.
- synthetic fibers in particular polyethylene fibers or polyethylene terephthalate fibers.
- the synthetic fibers preferably have a length of between 2 and 6 mm, preferably between 4 and 6 mm.
- the diameter of the synthetic fibers can be between 30 and 110 ⁇ m, preferably between 50 and 100 ⁇ m.
- the barrier effect of the transfer material according to the invention can be further enhanced by the additional use of synthetic fibers in the backing paper.
- the ink penetration of the transfer material according to the invention is below 30%, preferably below 20%, particularly preferably below 15%.
- up to 30% ink strike through is acceptable but results in a loss of sublimable dye.
- a transfer material with an ink strikethrough of less than 20% or less results in significantly less dye loss and is therefore more efficient overall.
- the backing paper can contain fillers and pigments.
- Kaolins calcium carbonate in its natural form such as limestone, marble or dolomite, precipitated calcium carbonate, calcium sulfate, barium sulfate, titanium dioxide, talc, silica, aluminum oxide, aluminum and magnesium silicates or silicic acids and mixtures thereof can be used as fillers and pigments for the production of the backing paper raw paper are used.
- the base paper according to the invention contains at least 5% by weight, based on the mass of the cellulose, of one or more pigments.
- hydrophobic pigments in particular those selected from the group consisting of kaolin, calcium carbonate, aluminum and magnesium silicates or silicic acids and mixtures thereof, has proven to be particularly practical. It has been found that the use of such hydrophobic pigments in the base paper according to the invention further improves the barrier effect for sublimable dyes. Without wanting to be bound to scientific theories, this also seems to be based on interactions or sorption processes between the sublimable dyes and the hydrophobic pigments, which significantly reduces the migration speed of the sublimable dyes. This interaction can be further enhanced by using hydrophobic pigments with a high specific surface area.
- the hydrophobic pigment therefore preferably has a specific surface area of greater than 80 m 2 /g.
- the carrier paper of the transfer material according to the invention is coated on one side with an ink-receiving layer.
- the color receiving layer is arranged on the side of the carrier paper to be printed.
- the color receiving layer can be a porous or microporous layer.
- a porous ink-receiving layer within the meaning of the invention contains connected air-filled cavities (pores) before printing. These pores can Ink liquid is absorbed very quickly by capillary forces and thus leads to rapid drying of the printed image.
- porous color receiving layers contain a high proportion of pigment particles and comparatively only small proportions of (film-forming) binder.
- Porous ink-receiving layers have a high air permeability, which can be determined using the Bendtsen method. Their pore volume can be detected and determined, for example, by liquid absorption measurements or by mercury porositometry.
- the porous color-receiving layer thus contains inorganic pigment and binder.
- Pigments with an anionic, neutral or only weakly cationic surface such as silica, calcium carbonate, kaolin, talc, bentonite, aluminum oxides or aluminum oxide hydrates are particularly preferred.
- finely divided polymeric compounds can also be present, preference being given to high-melting thermoplastic or duroplastic polymers.
- the color receiving layer can also contain a mixture of two or more pigments.
- the pigments preferably have an average particle size of from 100 nm to 30 ⁇ m, particularly preferably from 200 nm to 10 ⁇ m.
- the dye-receiving layer preferably additionally contains a polymeric binder, preferably a hydrophilic polymeric binder.
- the binder can be a water-soluble or water-dispersed binder.
- Preferred binders are styrene copolymers, polyvinyl alcohol, starch, modified starch, polyvinyl acetate, acrylates or polyurethane dispersions.
- the mass ratio of pigment to binder is from 100:1 to 100:50, preferably from 100:40 to 100:2.
- the application weight of the color receiving layer is preferably 1 g/m 2 to 50 g/m 2 , particularly preferably 3 g/m 2 to 30 g/m 2 .
- the air permeability of Color receiving layer measured according to Bendtsen, is preferably greater than 100 ml/min, particularly preferably 200 ml/min to 500 ml/min.
- the dye-receiving layer is preferably applied to the paper support by applying an aqueous coating composition, it being possible to use any of the application processes customary in the paper industry. Application by blade, squeegee, film press or curtain coating is preferred. A multi-layer curtain coating process is particularly preferred.
- the coating slips can contain other customary additives such as wetting agents, thickeners, rheology auxiliaries, dyes and optical brighteners.
- one or more further layers can be arranged between the base paper and the color receiving layer. These are preferably layers containing a hydrophilic binder.
- the process according to the invention is characterized in that the step of additionally applying a barrier layer between the color receiving layer and the base paper or on the reverse side (which does not have a Color receiving layer coated side) of the base paper is omitted, since the barrier effect is generated by the addition of the polymer dispersion during the manufacture of the base paper. This saves process steps and raw materials in the production of the transfer material.
- the method according to the invention is therefore significantly more efficient than the procedures known from the prior art.
- the method comprises the following additional step (a1) between step (a) and step (b): (a1) impregnation of the base paper with an impregnation solution comprising at least 1.0 g/m 2 of a polymer dispersion selected from the group consisting of polyacrylates, polyesters, polyolefins or mixtures thereof, in a size or film press.
- the impregnation solution can include the same polymer dispersion that was already added to the cellulose suspension for producing the backing paper in step (a). Additional impregnation of the backing paper leads to a further reduction in ink bleed through without sacrificing productivity in the wet end of the paper machine.
- the use of high amounts of polymer dispersion in the wet end of the paper machine is usually avoided, as this leads to disturbances in the sensitive household of the white water circuit in relation to charge and colloidal interactions of the particles, which has a negative effect on the productivity of the manufacturing process.
- the carrier paper is impregnated in step (a1) with an impregnation solution containing at least 1.5 g/m 2 , preferably at least 2.0 g/m 2 , particularly preferably at least 2.5 g/m 2 , very particularly preferably at least 3.0 g/m 2 of the polymer dispersion according to the invention.
- the impregnation solution used in step (a1) can contain the additives commonly used in papermaking and described above in connection with the production of the base paper, such as sizing agents, wet strength agents, dry strength agents, optical brighteners, fillers, pigments, dyes, antifoams and others contain chemical additives known in the paper industry.
- the present invention also relates to a method for transferring an image to a receiving material by sublimation, wherein a transfer material according to the invention is printed with an image by the ink-jet printing method and the image is transferred to a receiving material by sublimation.
- the receiving material is selected from polyester fabric, polyester fleece or a polyester-coated material.
- 1 shows schematically a cross section through a transfer material according to the invention.
- 1 designates a carrier made of paper.
- the carrier paper contains the polymer dispersion according to the invention.
- the backing paper is coated on one side with an ink receiving layer 2 for inkjet printing.
- a eucalyptus pulp was used to produce the backing paper.
- the pulp was ground as an approximately 5% aqueous suspension (high-density stock) using refiners to a freeness of 25° SR.
- the concentration of the cellulose fibers in the thin stock was about 1% by weight, based on the mass of the cellulose suspension.
- additives were added to the thinstock such as a neutral sizing agent alkyl ketene dimer (AKD) at 0.15% by weight, wet strength agent polyamine-polyamide-epichlorohydrin resin (Kymene ® ) at 0.60% by weight, starch ( C-Bond HR 35845) in an amount of 1.0% by weight and a natural ground CaCO 3 in an amount of 30% by weight.
- the amounts given relate to the pulp mass.
- the thin stock the pH of which was adjusted to about 7.5, was transferred from the headbox to the wire of the paper machine, whereupon sheet formation took place with dewatering of the web in the wire section of the paper machine.
- the paper web was further dewatered to a water content of 60% by weight, based on the web weight. Further drying took place in the drying section of the paper machine with heated drying cylinders. A raw paper with a basis weight of 63 g/m 2 , a filler content of 18% by weight and a moisture content of about 5.5% was produced.
- the coating slip obtained has a solids content of 26.6% by weight, a viscosity of 150 mPas, a pH of 7.5 and a surface tension of 36 mN/m.
- the resulting surface-sized, dried and smoothed backing paper is coated on one side with the coating composition for the dye-receiving layer.
- the transfer materials listed in the table below were prepared according to the process described above.
- the barrier component specified in the first column of Table 1 was used instead of eucalyptus pulp.
- the first comparative example corresponds to the carrier material produced without the addition of a further barrier component in the manufacture of the carrier paper in exchange for cellulose and is correspondingly referred to as "without barrier component".
- the comparative example which is referred to in the first column of the table as "without a barrier component with an additional barrier layer", was produced according to the above-mentioned process, but here no barrier component was added to the base paper during its production and the base paper on the side opposite the color receiving layer was also added provided with a barrier layer made of a thermoplastic polymer, such as a fully hydrolyzed polyvinyl alcohol (eg Mowiol ® 28-99).
- a barrier layer made of a thermoplastic polymer, such as a fully hydrolyzed polyvinyl alcohol (eg Mowiol ® 28-99).
- the data listed in Table 1 show that the use of at least 1.5 wt. Positive properties such as the good optical densities are retained during printing and very good curling behavior and low stickiness can be observed in the transfer process.
- the combination of good barrier properties, low stickiness in the transfer process and very good curl behavior can only be achieved with the recording materials according to the invention.
- the results in Table 1 show that this combination of properties with the recording materials described in the prior art without a barrier layer or with an additional barrier layer and with recording materials that contain less than 1.5% by weight, based on the mass of the pulp, of the polymer dispersion according to the invention in Have backing paper, can not be achieved.
- the transfer materials obtained were printed with a color image using the EPSON Workforce Pro WF 5110 inkjet printer with SubliJet IQ sublimation color inks from Sawgrass.
- the sublimation transfer paper to be tested is stored in the DIN A 4 format for at least 1 hour in a standard climate of 23° C. and 50% humidity in the printing room.
- Printing is done on standard sublimation desktop printers.
- the print file contains 10 round color fields with different decreasing amounts of ink to be printed in black printing.
- the print field at the top left is printed with 100% ink and the following with 10% less ink each.
- Below the print fields is the designation of the field in % and is specified as 100% - applied ink quantity in %. For example, the ink field that is printed with 80% amount of ink is labeled 20%.
- the following picture shows the print file.
- the paper After printing, the paper is left to dry for 1 hour in a standard climate.
- the sublimation process then takes place in the Sefa ROTEX AUTO X REL transfer press with a height indicator.
- the open transfer press is heated to 200°C.
- the textile After the temperature has been reached, the textile is first placed on the floor heating plate and then the printed paper with the printed side facing the textile.
- the so-called cover paper which is 80 g/m 2 copy paper made from bleached cellulose, is placed on the back of the printed sublimation paper and the transfer press is closed.
- the sublimation time is 30 seconds with medium contact pressure.
- the transfer press is opened and the 3 layers are carefully separated from each other.
- the textile is discarded.
- the sublimation ink sublimates to the back and, depending on the intensity of the ink penetration, is more or less deposited on the copy paper.
- the amount of ink plays an important role. The higher the amount of ink on the printed sublimation paper, the greater the tendency for ink to bleed through to the back or cover sheet.
- the gradation of the ink penetration is on the cover sheet just as visible.
- a visual assessment of the cover sheet is carried out to assess the ink strikethrough.
- the color field, which is just visible in daylight, is marked and given as a percentage value with regard to ink penetration.
- the prepared samples are labeled on the customer side (FS, M, AS) and stored customer side up for 30 minutes at 50 ⁇ 2% relative humidity and 23 ⁇ 1 °C on a smooth surface.
- the distance is measured from the point at which the corner point was before the start of the determination, ie before storage under the above-mentioned specified conditions (temperature, relative humidity) for 30 minutes, to the part of the DINA4 sample that was after 30 minutes under the above specified conditions (temperature, relative humidity) starting from the original point of the corner point diagonally to the center of the DINA4 pattern (intersection in the middle of the DINA4 pattern, which is formed if you draw imaginary straight lines from each corner point diagonally to the next corner) just barely lies flat on the smooth surface, ie that part of the DINA4 sample that still lies on the smooth surface after the corner of the sample has been rolled up.
- specified conditions temperature, relative humidity
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- Ink Jet Recording Methods And Recording Media Thereof (AREA)
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Abstract
Die Erfindung betrifft ein Transfermaterial für das Farbstoff-Sublimationsverfahren, umfassend ein Trägerpapier, das einseitig mit einer Farbempfangsschicht beschichtet ist, wobei das Trägerpapier mindestens 1,5 Gew.-%, bezogen auf die Masse des Zellstoffes, einer Polymerdispersion, ausgewählt aus der Gruppe, bestehend aus Polyacrylaten, Polyestern, Polyolefinen oder deren Mischungen, enthält. Die Erfindung betrifft ferner ein Verfahren zur Herstellung des erfindungsgemäßen Transfermaterials, umfassend die folgenden Schritte: (a) Herstellen eines Trägerpapiers auf einer Papiermaschine, wobei mindestens 1,5 Gew.-%, bezogen auf die Masse des Zellstoffes, einer Polymerdispersion, ausgewählt aus der Gruppe, bestehend aus Polyacrylaten, Polyestern, Polyolefinen oder deren Mischungen, während der Herstellung des Trägerpapiers der Zellstoffsuspension zugegeben werden (b) Trocknen und Glätten des Trägerpapiers; (c) Aufbringen der Farbempfangsschicht auf eine Oberfläche des Trägerpapiers; und (d) Trocknen des in Schritt (c) erhaltenen Transfermaterials. Ferner betrifft die Erfindung ein Verfahren zur Übertragung eines Bildes durch Sublimation auf ein Empfangsmaterial, wobei ein erfindungsgemäßes Transfermaterial mit einem Bild durch das Ink-Jet-Druckverfahren bedruckt wird und das Bild durch Sublimation auf ein Empfangsmaterial übertragen wird.The invention relates to a transfer material for the dye sublimation process, comprising a carrier paper which is coated on one side with a dye receiving layer, the carrier paper containing at least 1.5% by weight, based on the mass of the cellulose, of a polymer dispersion selected from the group consisting of polyacrylates, polyesters, polyolefins or mixtures thereof. The invention further relates to a method for producing the transfer material according to the invention, comprising the following steps: (a) producing a carrier paper on a paper machine, with at least 1.5% by weight, based on the mass of the pulp, of a polymer dispersion selected from Group consisting of polyacrylates, polyesters, polyolefins or mixtures thereof, are added to the pulp suspension during the manufacture of the base paper (b) drying and smoothing the base paper; (c) applying the color receiving layer to a surface of the base paper; and (d) drying the transfer material obtained in step (c). The invention also relates to a method for transferring an image to a receiving material by sublimation, wherein a transfer material according to the invention is printed with an image by the ink-jet printing method and the image is transferred to a receiving material by sublimation.
Description
Die Erfindung betrifft ein Transfermaterial für das Farbstoff-Sublimationsverfahren sowie ein Verfahren zu dessen Herstellung. Die Erfindung betrifft ferner ein Verfahren zur Übertragung eines Inkjet-Druckbilds von dem erfindungsgemäßen Transferpapier auf ein Empfangsmaterial.The invention relates to a transfer material for the dye sublimation process and a process for its production. The invention also relates to a method for transferring an inkjet print image from the transfer paper according to the invention to a receiving material.
Für das Bedrucken von Materialien wie Textilien oder starren Körpern, die aus mechanischen Gründen nur schlecht durch Direktdruckverfahren bedruckbar sind, bieten sich Transferdruckverfahren an, bei denen zunächst ein flexibles blattförmiges Transfermaterial bedruckt und das Druckbild von diesem auf den zu bedruckenden Gegenstand übertragen wird. Eine. spezielle Ausführungsform für ein solches Transferdruckverfahren ist das Farbstoff-Sublimationsverfahren, das zum Beispiel in
Übliche Transfermaterialien, auf die das zu übertragende Druckbild mittels Inkjet-Drucktechnik gedruckt wird, umfassen einen Träger, beispielsweise ein Basispapier, der mit einer Farbempfangsschicht beschichtet ist.Customary transfer materials, onto which the print image to be transferred is printed using inkjet printing technology, comprise a carrier, for example a base paper, which is coated with an ink-receiving layer.
Ein für das Farbstoff-Sublimationsverfahren geeignetes Transfermaterial sollte einerseits eine gute Aufnahme der Tintenflüssigkeit bei der Bedruckung mit dem zu übertragenden Bild ermöglichen, da sonst die Druckschärfe darunter leidet, andererseits sollte ein möglichst geringer Verlust von sublimierbarem Farbstoff bei der Übertragung des Druckbildes auf das zu bedruckende Material auftreten. Im Idealfall sollte ein Verlust an sublimierbarem Farbstoff durch Eindringen in das Papierinnere des Trägers und auf die Oberflächen der Transferpressen, sogenannter Tintendurchschlag, bei der Übertragung des Druckbildes vom Transfermaterial auf das zu bedruckende Material vollständig verhindert werden.A transfer material suitable for the dye sublimation process should, on the one hand, enable good absorption of the ink liquid when printing with the image to be transferred, otherwise the sharpness of the print will suffer, and on the other hand, the loss of sublimable dye when transferring the printed image to the image to be printed should be as small as possible material occur. In the ideal case, a loss of sublimable dye through penetration into the interior of the paper and onto the surfaces of the transfer presses, so-called ink strikethrough, should be completely prevented during the transfer of the print image from the transfer material to the material to be printed.
Die bisher im Markt eingesetzten Transfermaterialien für den Sublimationsdruck lassen sich grundsätzlich in zwei Gruppen einteilen. Zum einen gibt es die Gruppe der Transfermaterialien in denen filmbildende Bindemittel in der Farbempfangsschicht eingesetzt werden und die durch die filmbildenden Bindemittel bereits eine gewisse Barrierefunktion gegen den Durchschlag von Tinten besitzen. Zum anderen werden mikroporöse Farbempfangsschichten verwendet, die überwiegend nicht filmbildende Bindemittel in der Farbempfangsschicht einsetzen. Das Durchschlagen der Tinte wird bei diesen letztgenannten Produkten durch das Auftragen mindestens einer Barriereschicht auf der Rückseite des Trägers oder zwischen Träger und Farbempfangsschicht gelöst. Hierbei kommt es jedoch sowohl bei der Herstellung als auch in der späteren Anwendung zu Problemen durch die Klebrigkeit der Barriereschichten. Ein weiteres Problem in der Anwendung ist die deutliche Verschlechterung der Curl-Eigenschaften (unerwünschtes Aufrollen des Papiers) durch Aufbringen einer Barriereschicht.The transfer materials for sublimation printing that have been used on the market so far can basically be divided into two groups. On the one hand there is the group of transfer materials in which film-forming binders are used in the color receiving layer and which already have a certain barrier function against ink strike-through due to the film-forming binders. On the other hand, microporous ink-receiving layers are used, which predominantly use non-film-forming binders in the ink-receiving layer. In the latter products, ink strikethrough is prevented by applying at least one barrier layer to the back of the support or between the support and the ink-receiving layer. In this case, however, problems arise both during manufacture and in subsequent use due to the stickiness of the barrier layers. Another problem in use is the significant deterioration in the curl properties (undesirable rolling up of the paper) when a barrier layer is applied.
In der
Das gilt auch für die in der
In der
In der
Ein sogenanntes Thermotransfermaterial ist auch in der
Vor dem Hintergrund des Standes der Technik, liegt der Erfindung die Aufgabe zugrunde, ein Transfermaterial für das Farbstoff-Sublimationsverfahren bereitzustellen, welches keinen oder nur einen sehr geringen Durchschlag von sublimierbaren Farbstoffen durch den Träger des Transfermaterials erlaubt und bei dem die bekannten Probleme der Transfermaterialien des Standes der Technik nicht auftreten.Against the background of the state of the art, the invention is based on the object of providing a transfer material for the dye sublimation process which allows no or only very little penetration of sublimable dyes through the carrier of the transfer material which the known problems of the transfer materials of the prior art do not occur.
Gelöst wird diese Aufgabe durch ein Transfermaterial für das Farbstoff-Sublimationsverfahren, umfassend ein Trägerpapier, das einseitig mit einer Farbempfangsschicht beschichtet ist, wobei das Trägerpapier mindestens 1,5 Gew.-%, bezogen auf das Trockengewicht des Zellstoffes, einer Polymerdispersion, ausgewählt aus der Gruppe, bestehend aus Polyacrylaten, Polyestern, Polyolefinen oder deren Mischungen, enthält.This object is achieved by a transfer material for the dye sublimation process, comprising a carrier paper which is coated on one side with a dye receiving layer, the carrier paper containing at least 1.5% by weight, based on the dry weight of the cellulose, of a polymer dispersion selected from Group consisting of polyacrylates, polyesters, polyolefins or mixtures thereof.
Überraschend wurde gefunden, dass der Eintrag mindestens der genannten Menge an spezifischen Polymerdispersionen sowie deren Mischungen in das Trägerpapier des erfindungsgemäßen Transfermaterials zu einer deutlichen Verbesserung und sogar Verhinderung des Durchschlags sublimierbarer Farbstoffe bei seiner Verwendung im Farbstoff-Sublimationsverfahren führt. Ohne an wissenschaftliche Theorien gebunden sein zu wollen, scheint die Polymerdispersion im Trägerpapier des erfindungsgemäßen Transfermaterials eine Barriere gegenüber den sublimierbaren Farbstofftinten zu bilden, ohne dass ein vollständiger Verschluss des Trägerpapiers mittels einer zusätzlichen Barriereschicht erforderlich ist. Hierbei scheint die Barrierewirkung auf Sorptionsprozessen zwischen den sublimierbaren Farbstoffen und den spezifischen Polymeren zu beruhen. Dadurch, dass ein Aufbringen einer zusätzlichen Barriereschicht bei dem erfindungsgemäßen Transfermaterial nicht erforderlich ist, weist das erfindungsgemäße Transfermaterial die mit dem Aufbringen dieser Barriereschicht verbundenen Nachteile, wie Klebrigkeit, verschlechterte Curl-Eigenschaften und zu geringe Porosität der Farbempfangsschicht und damit verbunden langsame Trocknung und Verlaufen der Tinte auf der Oberfläche sowie unbefriedigende Druckschärfe, nicht auf.Surprisingly, it was found that introducing at least the specified amount of specific polymer dispersions and mixtures thereof into the backing paper of the transfer material according to the invention leads to a significant improvement and even prevention of the breakthrough of sublimable dyes when it is used in the dye sublimation process. Without wanting to be bound by scientific theories, the polymer dispersion in the base paper of the transfer material according to the invention appears to form a barrier to the sublimable dye inks without the need for complete closure of the base paper by means of an additional barrier layer. The barrier effect seems to be based on sorption processes between the sublimable dyes and the specific polymers. Due to the fact that an additional barrier layer does not need to be applied to the transfer material according to the invention, the transfer material according to the invention has the disadvantages associated with the application of this barrier layer, such as stickiness, impaired curl properties and insufficient porosity of the color receiving layer and the associated slow drying and running of the Ink on the surface and unsatisfactory print sharpness, not on.
Das erfindungsgemäße Transfermaterial umfasst ein Trägerpapier.The transfer material according to the invention comprises a carrier paper.
Das Trägerpapier ist vorzugsweise ein unbeschichtetes oder oberflächengeleimtes Papier. Das Trägerpapier kann neben Zellstoff-Fasern, Leimungsmittel wie Alkylkentendimere, Fettsäuren und/oder Fettsäuresalze, epoxydierte Fettsäureamide, Alkenyl- oder Alkylbernsteinsäureanhydrid, Stärke, Baumharze, Nassfestmittel wie Polyamin-Polyamid-Epichlorhydrin, Trockenfestmittel wie anionische, kationische oder amphotere Polyamide, optische Aufheller, Pigmente, Farbstoffe, Entschäumer und weitere in der Papierindustrie bekannte chemische Additive enthalten. Üblicherweise werden bei der Papierherstellung Leimungsmittel mit einer Zugabemenge von 0,2% oder weniger, Nassfestmittel mit einer Zugabemenge von 0,5% oder weniger und Trockenfestmittel mit einer Zugabemenge von 1,0% oder weniger eingesetzt. Dabei werden die zugegebenen Mengen so gering wie möglich dosiert um Kosten und unnötige und unkontrollierte Mehrfachumläufe der Mittel im Stoffkreislauf zu vermeiden.The carrier paper is preferably an uncoated or surface-sized paper. In addition to cellulose fibers, the backing paper can contain sizing agents such as Alkylkentene dimers, fatty acids and/or fatty acid salts, epoxidized fatty acid amides, alkenyl or alkyl succinic anhydride, starch, tree resins, wet strength agents such as polyamine-polyamide-epichlorohydrin, dry strength agents such as anionic, cationic or amphoteric polyamides, optical brighteners, pigments, dyes, defoamers and others in the paper industry known chemical additives. Usually, in papermaking, sizing agents are used in an addition amount of 0.2% or less, wet strength agents in an addition amount of 0.5% or less, and dry strength agents in an addition amount of 1.0% or less. The amounts added are dosed as small as possible in order to avoid costs and unnecessary and uncontrolled multiple circulations of the agent in the material cycle.
Das Trägerpapier kann oberflächengeleimt sein. Hierzu geeignete Leimmittel sind beispielsweise Polyvinylalkohol oder Stärke-Dextrine oder modifizierte Stärken wie oxidierte Stärken oder Stärke-Ether. Das Trägerpapier kann auf einer Langsiebmaschine mit oder ohne Obersieb hergestellt werden. Das Flächengewicht des Trägerpapiers kann 30 bis 200 g/m2, insbesondere 40 bis 120 g/m2, betragen. Das Trägerpapier kann in unverdichteter oder verdichteter Form (geglättet) eingesetzt werden. Besonders gut geeignet sind Trägerpapiere mit einer Dichte von 0,6 bis 1,05 g/cm3; insbesondere 0,70 bis 0,9 g/cm3. Die Glättung kann in üblicher Weise mit einer Kalandrierung erfolgen.The backing paper can be surface sized. Sizing agents suitable for this are, for example, polyvinyl alcohol or starch dextrins or modified starches such as oxidized starches or starch ethers. The backing paper can be produced on a fourdrinier machine with or without a top wire. The basis weight of the carrier paper can be 30 to 200 g/m 2 , in particular 40 to 120 g/m 2 . The backing paper can be used in uncompressed or compressed (smoothed) form. Backing papers with a density of 0.6 to 1.05 g/cm 3 are particularly suitable; in particular 0.70 to 0.9 g/cm 3 . The smoothing can be done in the usual way with a calendering.
Für die Herstellung des Trägerpapiers können alle für diesen Zweck üblichen Zellstoffe verwendet werden. Der Zellstoff für die Herstellung des Trägerpapiers ist vorzugsweise ein Eukalyptus-Zellstoff mit einem Faserstoffanteil kleiner 200 µm nach Mahlung von 10 bis 35 Gew.-% und einer mittleren Faserlänge von 0,5 bis 0,75 mm. Es hat sich gezeigt, dass die Verwendung eines Zellstoffs mit einem limitierten Anteil von Fasern kleiner 200 µm den beim Einsatz von Füllstoff auftretenden Steifigkeitsverlust verringert.Any cellulose that is customary for this purpose can be used to produce the backing paper. The cellulose for the production of the backing paper is preferably a eucalyptus cellulose with a fiber content of less than 200 μm after beating of 10 to 35% by weight and an average fiber length of 0.5 to 0.75 mm. It has been shown that the use of pulp with a limited proportion of fibers smaller than 200 µm reduces the loss of stiffness that occurs when using filler.
Es können auch Laubholzzellstoffe (NBHK - Northern Bleached Hardwood Kraft Pulp) und Nadelholzzellstoffe verwendet werden.Hardwood pulps (NBHK - Northern Bleached Hardwood Kraft Pulp) and softwood pulps can also be used.
Erfindungsgemäß enthält das Trägerpapier mindestens 1,5 Gew.-%, bezogen auf die Masse des Zellstoffes, einer Polymerdispersion, ausgewählt aus der Gruppe, bestehend aus Polyacrylaten, Polyestern, Polyolefinen oder deren Mischungen, enthält, (im Folgenden auch erfindungsgemäße Polymerdispersion).According to the invention, the backing paper contains at least 1.5% by weight, based on the mass of the pulp, of a polymer dispersion selected from the group consisting of polyacrylates, polyesters, polyolefins or mixtures thereof (hereinafter also polymer dispersion according to the invention).
Der Einsatz von mindestens 1,5 Gew.-% der erfindungsgemäßen Polymerdispersion führt überraschend zu einer deutlichen Verbesserung der Barriereeigenschaften des Transfermaterials ohne dass, wie im Stand der Technik, eine zusätzliche Barriereschicht benötigt wird. Dabei liegen die erfindungsgemäßen Einsatzmengen der Polymerdispersion deutlich oberhalb der Einsatzmengen von üblichen, bei der Herstellung eines Trägerpapiers verwendeten, Polymerdispersionen, wie beispielsweise Leimungsmittel, Nassfestmittel oder Trockenfestmittel.The use of at least 1.5% by weight of the polymer dispersion according to the invention surprisingly leads to a significant improvement in the barrier properties of the transfer material without an additional barrier layer being required, as is the case in the prior art. The amounts used according to the invention of the polymer dispersion are significantly above the amounts used of customary polymer dispersions used in the production of a backing paper, such as sizing agents, wet strength agents or dry strength agents.
Bei den erfindungsgemäß eingesetzten Polyacrylaten handelt es sich beispielsweise um Styrol-Alkylacrylat-Copolymer oder Methyl-Methacrylat. Das Alkyl im Styrol-Alkylacrylat- Copolymer hat bevorzugt die Bedeutung Methyl, Ethyl, Propyl, Butyl und/oder Hexyl. Vorzugsweise handelt es sich bei dem Alkyl im Styrol-Alkylacrylat-Copolymer um Ethyl oder Butyl. Es können Copolymere als Gemische der vorgenannten Alkylgruppen im Alkylacrylat-Anteil des Styrol-Alkylacrylat-Copolymeren verwendet werden. Die erfindungsgemäß eingesetzten Polyester sind bevorzugt ausgewählt aus der Gruppe, bestehend aus Polybutylenterephthalat, Polyethylenterephthalat, Polylactid, Polytrimethylenterephthalat, Polyethylennaphthalat, Polycarbonat, Polyestercarbonat. Als Polyolefine können beispielsweise Polyethylen, Polybutylen, Polymethylpenten und Polyisobutylen eingesetzt werden.The polyacrylates used according to the invention are, for example, styrene-alkyl acrylate copolymers or methyl methacrylate. The alkyl in the styrene-alkyl acrylate copolymer is preferably methyl, ethyl, propyl, butyl and/or hexyl. Preferably, the alkyl in the styrene-alkyl acrylate copolymer is ethyl or butyl. Copolymers can be used as mixtures of the above alkyl groups in the alkyl acrylate portion of the styrene-alkyl acrylate copolymer. The polyesters used according to the invention are preferably selected from the group consisting of polybutylene terephthalate, polyethylene terephthalate, polylactide, polytrimethylene terephthalate, polyethylene naphthalate, polycarbonate, polyester carbonate. Examples of polyolefins that can be used are polyethylene, polybutylene, polymethylpentene and polyisobutylene .
Gemäß einer bevorzugten Ausführungsform der Erfindung enthält das Trägerpapier mindestens 2 Gew.-%, insbesondere mindestens 2,5 Gew.-%, bevorzugt mindestens 3 Gew.-%, bezogen auf die Masse des Zellstoffes, einer erfindungsgemäßen Polymerdispersion. Es hat sich herausgestellt, dass ein derartiges Transfermaterial eine weiter verbesserte Barrierewirkung aufweist, so dass es bei einem solchen Transfermaterial nochmals zu einer deutlichen Reduktion des Tintendurchschlags kommt. Es hat sich als besonders praxisgerecht erwiesen, wenn die Polymerdispersion innerhalb der Dicke des Trägerpapiers gleichmäßig verteilt vorliegt. Hierdurch wird eine gleichbleibende Barrierewirkung über die gesamte Fläche des Trägermaterials in besonders hohem Maße sichergestellt.According to a preferred embodiment of the invention, the carrier paper contains at least 2% by weight, in particular at least 2.5% by weight, preferably at least 3% by weight, based on the mass of the pulp, of a polymer dispersion according to the invention. It has been found that such a transfer material has a further improved barrier effect, so that with such a transfer material there is again a significant reduction in ink strikethrough. It has proven to be particularly practical if the polymer dispersion is distributed uniformly within the thickness of the backing paper. This ensures a particularly high degree of a constant barrier effect over the entire surface of the carrier material.
Neben Zellstofffasern können auch Anteile anderer natürlicher oder synthetischer Fasern für die Herstellung des Trägerpapiers eingesetzt werden. Vorzugsweise liegt der Anteil der anderen Fasern an der Gesamtfasermasse unter 40 Gew.-%, besonders bevorzugt sind Anteile sonstiger Fasern unter 20 Gew.-%.In addition to cellulose fibers, proportions of other natural or synthetic fibers can also be used to produce the backing paper. The proportion of other fibers in the total fiber mass is preferably below 40% by weight, with proportions of other fibers being below 20% by weight being particularly preferred.
Gemäß einer bevorzugten Ausführungsform enthält das Trägerpapier mindestens 5 Gew.- %, insbesondere zwischen 5 und 20 Gew.-%, ganz besonders bevorzugt zwischen 8 und 15 Gew.-%. bezogen auf die Masse des Zellstoffes, synthetische Fasern, insbesondere Polyethylenfasern oder Polyethylenterephthalatfasern. Bevorzugt weisen die synthetischen Fasern eine Länge zwischen 2 und 6 mm, vorzugsweise zwischen 4 und 6 mm auf. Der Durchmesser der synthetischen Fasern kann zwischen 30 und 110 µm, bevorzugt zwischen 50 und 100 µm liegen.According to a preferred embodiment, the carrier paper contains at least 5% by weight, in particular between 5 and 20% by weight, very particularly preferably between 8 and 15% by weight. based on the mass of the pulp, synthetic fibers, in particular polyethylene fibers or polyethylene terephthalate fibers. The synthetic fibers preferably have a length of between 2 and 6 mm, preferably between 4 and 6 mm. The diameter of the synthetic fibers can be between 30 and 110 μm, preferably between 50 and 100 μm.
Es hat sich herausgestellt, dass sich die Barrierewirkung des erfindungsgemäßen Transfermaterials durch den zusätzlichen Einsatz von synthetischen Fasern im Trägerpapier nochmals weiter verstärken lässt.It has been found that the barrier effect of the transfer material according to the invention can be further enhanced by the additional use of synthetic fibers in the backing paper.
Gemäß einer bevorzugten Ausführungsform der Erfindung liegt der Tintendurchschlag des erfindungsgemäßen Transfermaterials unter 30%, bevorzugt unter 20%, besonders bevorzugt unter 15%. In der Praxis ist ein Tintendurchschlag bis 30% akzeptabel, führt aber zu einem Verlust an sublimierbarem Farbstoff. Ein Transfermaterial mit einem Tintendurchschlag von unter 20% oder weniger führt zu einem deutlich geringeren Farbstoffverlust und ist damit insgesamt effizienter.According to a preferred embodiment of the invention, the ink penetration of the transfer material according to the invention is below 30%, preferably below 20%, particularly preferably below 15%. In practice, up to 30% ink strike through is acceptable but results in a loss of sublimable dye. A transfer material with an ink strikethrough of less than 20% or less results in significantly less dye loss and is therefore more efficient overall.
Das Trägerpapier kann Füllstoffe und Pigmente enthalten.The backing paper can contain fillers and pigments.
Als Füllstoffe und Pigmente für die Herstellung des Trägerpapiers können beispielsweise Kaoline, Calciumcarbonat in seiner natürlichen Form wie Kalkstein, Marmor oder Dolomitstein, gefälltes Calciumcarbonat, Calciumsulfat, Bariumsulfat, Titandioxid, Talkum, Silica, Aluminiumoxid, Aluminium- und Magnesiumsilikate oder Kieselsäuren und deren Gemische im Rohpapier eingesetzt werden.Kaolins, calcium carbonate in its natural form such as limestone, marble or dolomite, precipitated calcium carbonate, calcium sulfate, barium sulfate, titanium dioxide, talc, silica, aluminum oxide, aluminum and magnesium silicates or silicic acids and mixtures thereof can be used as fillers and pigments for the production of the backing paper raw paper are used.
Gemäß einer bevorzugten Ausführungsform enthält das erfindungsgemäße Trägerpapier mindestens 5 Gew.-%, bezogen auf die Masse des Zellstoffes, eines oder mehrerer Pigmente. Als besonders praxisgerecht hat sich der Einsatz von hydrophoben Pigmenten, insbesondere solchen, die ausgewählt sind aus der Gruppe bestehend aus Kaolin, Calciumcarbonat, Aluminium- und Magnesiumsilikaten oder Kieselsäuren sowie deren Mischungen, erwiesen. Es hat sich herausgestellt, dass der Einsatz solcher hydrophoben Pigmente im erfindungsgemäßen Trägerpapier die Barrierewirkung für sublimierbare Farbstoffe nochmals weiter verbessert. Ohne an wissenschaftliche Theorien gebunden sein zu wollen, scheint dies ebenfalls auf Wechselwirkungen bzw. Sorptionsprozessen zwischen den sublimierbaren Farbstoffen und den hydrophoben Pigmenten zu beruhen, durch die die Migrationsgeschwindigkeit der sublimierbaren Farbstoffe deutlich reduziert wird. Diese Wechselwirkung lässt sich durch den Einsatz von hydrophoben Pigmenten mit einer hohen spezifischen Oberfläche nochmals verstärken. Bevorzugt weist das hydrophobe Pigment daher eine spezifische Oberfläche von größer 80 m2/g auf.According to a preferred embodiment, the base paper according to the invention contains at least 5% by weight, based on the mass of the cellulose, of one or more pigments. The use of hydrophobic pigments, in particular those selected from the group consisting of kaolin, calcium carbonate, aluminum and magnesium silicates or silicic acids and mixtures thereof, has proven to be particularly practical. It has been found that the use of such hydrophobic pigments in the base paper according to the invention further improves the barrier effect for sublimable dyes. Without wanting to be bound to scientific theories, this also seems to be based on interactions or sorption processes between the sublimable dyes and the hydrophobic pigments, which significantly reduces the migration speed of the sublimable dyes. This interaction can be further enhanced by using hydrophobic pigments with a high specific surface area. The hydrophobic pigment therefore preferably has a specific surface area of greater than 80 m 2 /g.
Das Trägerpapier des erfindungsgemäßen Transfermaterials ist einseitig mit einer Farbempfangsschicht beschichtet. Dabei ist die Farbempfangsschicht auf der zu bedruckenden Seite des Trägerpapiers angeordnet.The carrier paper of the transfer material according to the invention is coated on one side with an ink-receiving layer. The color receiving layer is arranged on the side of the carrier paper to be printed.
Die Farbempfangsschicht kann eine poröse oder mikroporöse Schicht sein. Eine poröse Farbempfangsschicht im Sinne der Erfindung enthält vor dem Bedrucken zusammenhängende luftgefüllt Hohlräume (Poren). Diese Poren können Tintenflüssigkeit durch Kapillarkräfte sehr schnell aufsaugen und führen damit zur schnellen Trocknung des Druckbilds. Im Gegensatz zu filmartigen Farbempfangsschichten enthalten solche porösen Farbempfangsschichten einen hohen Anteil an Pigmentpartikeln und vergleichsweise nur geringe Anteile an (filmbildenden) Bindemittel.The color receiving layer can be a porous or microporous layer. A porous ink-receiving layer within the meaning of the invention contains connected air-filled cavities (pores) before printing. These pores can Ink liquid is absorbed very quickly by capillary forces and thus leads to rapid drying of the printed image. In contrast to film-like color receiving layers, such porous color receiving layers contain a high proportion of pigment particles and comparatively only small proportions of (film-forming) binder.
Poröse Farbempfangsschichten weisen eine hohe Luftdurchlässigkeit auf, die nach der Bendtsen-Methode ermittelt werden kann. Deren Porenvolumen kann beispielsweise durch Flüssigkeitsabsorptionsmessungen oder durch Quecksilber-Porositometrie nachgewiesen und ermittelt werden.Porous ink-receiving layers have a high air permeability, which can be determined using the Bendtsen method. Their pore volume can be detected and determined, for example, by liquid absorption measurements or by mercury porositometry.
Die poröse Farbempfangsschicht enthält somit anorganisches Pigment und Bindemittel. Besonders bevorzug sind Pigmente mit einer anionischen, neutralen oder nur schwach kationischen Oberfläche wie Silica, Calciumcarbonat, Kaolin, Talkum, Bentonit, Aluminiumoxide oder Aluminiumoxidhydrate. Es können aber auch feinteilige polymere Verbindungen enthalten sein, wobei hochschmelzende thermoplastische oder duroplastische Polymere bevorzugt werden. In einer weiteren Ausführungsform der Erfindung kann die Farbaufnahmeschicht auch eine Mischung von zwei oder mehreren Pigmenten enthalten. Die Pigmente haben vorzugsweise eine mittlere Teilchengröße von 100 nm bis 30 µm, besonders bevorzugt von 200 nm bis 10 µm.The porous color-receiving layer thus contains inorganic pigment and binder. Pigments with an anionic, neutral or only weakly cationic surface such as silica, calcium carbonate, kaolin, talc, bentonite, aluminum oxides or aluminum oxide hydrates are particularly preferred. However, finely divided polymeric compounds can also be present, preference being given to high-melting thermoplastic or duroplastic polymers. In a further embodiment of the invention, the color receiving layer can also contain a mixture of two or more pigments. The pigments preferably have an average particle size of from 100 nm to 30 μm, particularly preferably from 200 nm to 10 μm.
Die Farbempfangsschicht enthält vorzugsweise zusätzlich ein polymeres Bindemittel, bevorzugt ein hydrophiles polymeres Bindemittel. Das Bindemittel kann ein wasserlösliches oder in Wasser dispergiertes Bindemittel sein. Bevorzugte Bindemittel sind Styrol-Copolymere, Polyvinylalkohol, Stärke, modifizierte Stärke, Polyvinylacetat, Acrylate oder Polyurethandisperisonen. Das Massenverhältnis von Pigment zu Bindemittel beträgt 100:1 bis 100:50, vorzugsweise 100:40 bis 100:2.The dye-receiving layer preferably additionally contains a polymeric binder, preferably a hydrophilic polymeric binder. The binder can be a water-soluble or water-dispersed binder. Preferred binders are styrene copolymers, polyvinyl alcohol, starch, modified starch, polyvinyl acetate, acrylates or polyurethane dispersions. The mass ratio of pigment to binder is from 100:1 to 100:50, preferably from 100:40 to 100:2.
Das Auftragsgewicht der Farbempfangsschicht beträgt vorzugsweise 1 g/m2 bis 50 g/m2, besonders bevorzugt 3 g/m2 bis 30 g/m2. Die Luftdurchlässigkeit der Farbempfangsschicht, gemessen nach Bendtsen, ist vorzugsweise größer als 100 ml/min, besonders bevorzugt 200 ml/min bis 500 ml/min.The application weight of the color receiving layer is preferably 1 g/m 2 to 50 g/m 2 , particularly preferably 3 g/m 2 to 30 g/m 2 . The air permeability of Color receiving layer, measured according to Bendtsen, is preferably greater than 100 ml/min, particularly preferably 200 ml/min to 500 ml/min.
Die Farbempfangsschicht wird vorzugsweise durch Auftrag von wässriger Streichmasse auf den Papierträger aufgebracht, wobei alle in der Papierindustrie üblichen Auftragsverfahren verwendet werden können. Bevorzugt wird ein Auftrag mittels Blade, Rakel, Filmpresse oder durch Curtain-Coating. Besonders bevorzugt ist ein mehrlagiges Curtain-Coating-Verfahren.The dye-receiving layer is preferably applied to the paper support by applying an aqueous coating composition, it being possible to use any of the application processes customary in the paper industry. Application by blade, squeegee, film press or curtain coating is preferred. A multi-layer curtain coating process is particularly preferred.
Die Streichmassen können weitere übliche Zusatzstoffe wie Netzmittel, Verdicker, Rheologiehilfsmittel, Farbstoffe und optische Aufheller enthalten.The coating slips can contain other customary additives such as wetting agents, thickeners, rheology auxiliaries, dyes and optical brighteners.
Zwischen dem Trägerpapier und der Farbempfangsschicht können im erfindungsgemäßen Transfermaterial eine oder mehrere weitere Schichten angeordnet sein. Vorzugsweise handelt es sich dabei um ein hydrophiles Bindemittel enthaltende Schichten.In the transfer material according to the invention, one or more further layers can be arranged between the base paper and the color receiving layer. These are preferably layers containing a hydrophilic binder.
Ein weiterer Gegenstand der Erfindung ist ein Verfahren zur Herstellung des erfindungsgemäßen Trägermaterials, umfassend die folgenden Schritte:
- (a) Herstellen eines Trägerpapiers auf einer Papiermaschine,
wobei mindestens 1,5 Gew.-%, bezogen auf die Masse des Zellstoffes, einer Polymerdispersion, ausgewählt aus der Gruppe, bestehend aus Polyacrylaten, Polyestern, Polyolefinen oder deren Mischungen, während der Herstellung des Trägerpapiers der Zellstoffsuspension zugegeben werden; - (b) Trocknen und Glätten des Trägerpapiers;
- (c) Aufbringen der Farbempfangsschicht auf eine Oberfläche des Trägerpapiers; und
- (d) Trocknen des in Schritt (c) erhaltenen Transfermaterials.
- (a) Production of a backing paper on a paper machine, with at least 1.5% by weight, based on the mass of the pulp, of a polymer dispersion selected from the group consisting of polyacrylates, polyesters, polyolefins or mixtures thereof, during the production of the Carrier paper of the pulp suspension are added;
- (b) drying and smoothing the base paper;
- (c) applying the color receiving layer to a surface of the base paper; and
- (d) drying the transfer material obtained in step (c).
Das erfindungsgemäße Verfahren zeichnet sich im Vergleich zu den im Stand der Technik bekannten Verfahren zur Herstellung von Transfermaterialien für das Farbstoff-Sublimationsverfahren dadurch aus, dass der Schritt des zusätzlichen Aufbringens einer Barriereschicht zwischen die Farbempfangsschicht und das Trägerpapier oder auf die Rückseite (die nicht mit einer Farbempfangsschicht beschichtete Seite) des Trägerpapiers wegfällt, da die Barrierewirkung durch die Zugabe der Polymerdispersion während der Herstellung des Trägerpapiers erzeugt wird. Hierdurch werden bei der Herstellung des Transfermaterials Verfahrensschritte und Rohstoffe eingespart. Das erfindungsgemäße Verfahren ist damit deutlich effizienter als die aus dem Stand der Technik bekannten Verfahrensweisen.Compared to the processes known in the prior art for the production of transfer materials for the dye sublimation process, the process according to the invention is characterized in that the step of additionally applying a barrier layer between the color receiving layer and the base paper or on the reverse side (which does not have a Color receiving layer coated side) of the base paper is omitted, since the barrier effect is generated by the addition of the polymer dispersion during the manufacture of the base paper. This saves process steps and raw materials in the production of the transfer material. The method according to the invention is therefore significantly more efficient than the procedures known from the prior art.
Die oben bereits im Zusammenhang mit dem erfindungsgemäßen Transfermaterial gemachten Angaben gelten für das erfindungsgemäße Verfahren entsprechend.The statements made above in connection with the transfer material according to the invention apply correspondingly to the method according to the invention.
Gemäß einer bevorzugten Ausführungsform des erfindungsgemäßen Verfahrens umfasst das Verfahren zwischen Schritt (a) und Schritt (b) folgenden zusätzlichen Schritt (a1):
(a1) Imprägnieren des Trägerpapiers mit einer Imprägnierlösung, die mindestens 1,0 g/m2 einer Polymerdispersion, ausgewählt aus der Gruppe, bestehend aus Polyacrylaten, Polyestern, Polyolefinen oder deren Mischungen umfasst, in einer Leim- oder Filmpresse.According to a preferred embodiment of the method according to the invention, the method comprises the following additional step (a1) between step (a) and step (b):
(a1) impregnation of the base paper with an impregnation solution comprising at least 1.0 g/m 2 of a polymer dispersion selected from the group consisting of polyacrylates, polyesters, polyolefins or mixtures thereof, in a size or film press.
Dabei kann die Imprägnierlösung die gleiche Polymerdispersion umfassen, die der Zellstoffsuspension zur Herstellung des Trägerpapiers in Schritt (a) bereits hinzugegeben wurde. Eine zusätzliche Imprägnierung des Trägerpapiers führt zu weiterer Reduktion des Tintendurchschlages ohne Produktivitätseinbußen im Nassteil der Papiermaschine. Der Einsatz hoher Mengen an Polymerdispersion im Nassteil der Papiermaschine wird üblicherweise vermieden, da dies zu Störungen im sensiblen Haushalt des Siebwasserkreislaufs bezogen auf Ladung und kolloidale Wechselwirkungen der Partikel führt, was sich nachteilig auf die Produktivität des Herstellungsprozesses auswirkt. Durch die Möglichkeit die Polymerdispersion sowohl im Nassteil der Papiermaschine als auch in der Leim- oder Filmpresse zuzugeben, lässt sich das prozessbedingte Risiko für eine Verschlechterung der Produktionseffizienz reduzieren, da für das Einbringen einer bestimmten Gesamtmenge an Polymerdispersion zwei unterschiedliche Zeitpunkte bei der Papierherstellung verwendet werden können, so dass es nicht zu einer lokal zu hohen Konzentration der Polymerdispersion im Nassteil der Papiermaschine oder in der Leim- bzw. Filmpresse und damit nicht zu den oben beschriebenen Nachteilen kommt.The impregnation solution can include the same polymer dispersion that was already added to the cellulose suspension for producing the backing paper in step (a). Additional impregnation of the backing paper leads to a further reduction in ink bleed through without sacrificing productivity in the wet end of the paper machine. The use of high amounts of polymer dispersion in the wet end of the paper machine is usually avoided, as this leads to disturbances in the sensitive household of the white water circuit in relation to charge and colloidal interactions of the particles, which has a negative effect on the productivity of the manufacturing process. The possibility of adding the polymer dispersion both in the wet end of the paper machine and in the size or film press allows The process-related risk of a deterioration in production efficiency is reduced, since two different points in time during papermaking can be used to introduce a certain total amount of polymer dispersion, so that there is not a locally too high concentration of the polymer dispersion in the wet end of the paper machine or in the glue - Or film press and thus does not come to the disadvantages described above.
Gemäß einer bevorzugten Ausführungsform wird das Trägerpapier in Schritt (a1) mit einer Imprägnierlösung imprägniert, die mindestens 1,5 g/m2, bevorzugt mindestens 2,0 g/m2, besonders bevorzugt mindestens 2,5 g/m2, ganz besonders bevorzugt mindestens 3,0 g/m2 der erfindungsgemäßen Polymerdispersion umfasst.According to a preferred embodiment, the carrier paper is impregnated in step (a1) with an impregnation solution containing at least 1.5 g/m 2 , preferably at least 2.0 g/m 2 , particularly preferably at least 2.5 g/m 2 , very particularly preferably at least 3.0 g/m 2 of the polymer dispersion according to the invention.
Neben der erfindungsgemäßen Polymerdispersion kann die in Schritt (a1) verwendete Imprägnierlösung die bei der Papierherstellung üblicherweise eingesetzten und oben im Zusammenhang mit der Herstellung des Trägerpapiers beschriebenen Zusatzstoffe, wie Leimungsmittel, Nassfestmittel, Trockenfestmittel, optische Aufheller, Füllstoffe, Pigmente, Farbstoffe, Entschäumer und weitere in der Papierindustrie bekannte chemische Additive enthalten.In addition to the polymer dispersion according to the invention, the impregnation solution used in step (a1) can contain the additives commonly used in papermaking and described above in connection with the production of the base paper, such as sizing agents, wet strength agents, dry strength agents, optical brighteners, fillers, pigments, dyes, antifoams and others contain chemical additives known in the paper industry.
Schließlich betrifft die vorliegende Erfindung auch ein Verfahren zur Übertragung eines Bilds durch Sublimation auf ein Empfangsmaterial, wobei ein erfindungsgemäßes Transfermaterial mit einem Bild durch das Ink-Jet-Druckverfahren bedruckt wird und das Bild durch Sublimation auf ein Empfangsmaterial übertragen wird.Finally, the present invention also relates to a method for transferring an image to a receiving material by sublimation, wherein a transfer material according to the invention is printed with an image by the ink-jet printing method and the image is transferred to a receiving material by sublimation.
Gemäß einer bevorzugten Ausführungsform des erfindungsgemäßen Verfahrens ist das Empfangsmaterial ausgewählt aus Polyestergewebe, Polyestervlies oder einem mit Polyester beschichteten Material.According to a preferred embodiment of the method according to the invention, the receiving material is selected from polyester fabric, polyester fleece or a polyester-coated material.
Die folgenden Beispiele dienen der weiteren Erläuterung der Erfindung.The following examples serve to further illustrate the invention.
Zur Herstellung des Trägerpapiers wurde ein Eukalyptus-Zellstoff eingesetzt. Zur Mahlung wurde der Zellstoff als etwa 5 %ige wässrige Suspension (Dickstoff) mit Hilfe von Refinern auf einen Mahlgrad von 25 °SR gemahlen. Die Konzentration der Zellstofffasern im Dünnstoff betrug in etwa 1 Gew.-%, bezogen auf die Masse der Zellstoffsuspension. Dem Dünnstoff wurden weitere Zusatzstoffe zugesetzt wie ein neutrales Leimungsmittel Alkylketendimer (AKD) in einer Menge von 0,15 Gew.-%, Nassfestmittel Polyamin-Polyamid-Epichlorhydrinharz (Kymene®) in einer Menge von 0,60 Gew.-%, Stärke (C-Bond HR 35845) in einer Menge von 1,0 Gew.-% und ein natürliches gemahlenes CaCO3 in einer Menge von 30 Gew.-%. Die Mengenangaben beziehen sich auf die Zellstoffmasse. Der Dünnstoff, dessen pH-Wert auf etwa 7,5 eingestellt wurde, wurde vom Stoffauflauf auf das Sieb der Papiermaschine gebracht, worauf die Blattbildung unter Entwässerung der Bahn in der Siebpartie der Papiermaschine erfolgte. In der Pressenpartie erfolgte die weitere Entwässerung der Papierbahn auf einen Wassergehalt von 60 Gew.-%, bezogen auf das Bahngewicht. Die weitere Trocknung erfolgte in der Trockenpartie der Papiermaschine mit beheizten Trockenzylindern. Es entstand ein Rohpapier mit einem Flächengewicht von 63 g/m2, einem Füllstoffgehalt von 18 Gew.-% und einer Feuchte von etwa 5,5%.A eucalyptus pulp was used to produce the backing paper. For grinding, the pulp was ground as an approximately 5% aqueous suspension (high-density stock) using refiners to a freeness of 25° SR. The concentration of the cellulose fibers in the thin stock was about 1% by weight, based on the mass of the cellulose suspension. Other additives were added to the thinstock such as a neutral sizing agent alkyl ketene dimer (AKD) at 0.15% by weight, wet strength agent polyamine-polyamide-epichlorohydrin resin (Kymene ® ) at 0.60% by weight, starch ( C-Bond HR 35845) in an amount of 1.0% by weight and a natural ground CaCO 3 in an amount of 30% by weight. The amounts given relate to the pulp mass. The thin stock, the pH of which was adjusted to about 7.5, was transferred from the headbox to the wire of the paper machine, whereupon sheet formation took place with dewatering of the web in the wire section of the paper machine. In the press section, the paper web was further dewatered to a water content of 60% by weight, based on the web weight. Further drying took place in the drying section of the paper machine with heated drying cylinders. A raw paper with a basis weight of 63 g/m 2 , a filler content of 18% by weight and a moisture content of about 5.5% was produced.
Zu 441 g einer verdünnten Dispersion von gefälltem Calciumcarbonat (Precarb® 800 der Firma Schaefer Kalk) mit einem Feststoffgehalt von 48 Gew.-% werden 557g einer wässrigen 9,5 Gew.-% Lösung eines teilverseiften Polyvinylalkohols (Mowiol® 18-88 der Firma Kuraray) zugegeben und die Mischung dabei mit einem Dissolver-Rührer vermischt. Danach wird 0,5 g Netzmittel Surfynol® 440 der Firma Air Products zugemischt. Die erhaltene Streichmasse hat einen Feststoffgehalt von 26,6 Gew.-%, eine Viskosität von 150 mPas, einen pH-Wert von 7,5 und eine Oberflächenspannung von 36 mN/m.557g of an aqueous 9.5% by weight solution of a partially hydrolyzed polyvinyl alcohol ( Mowiol® 18-88 from the company Kuraray) was added and the mixture mixed with a dissolver stirrer. Then 0.5 g Surfynol® 440 wetting agent from Air Products is mixed in. The coating slip obtained has a solids content of 26.6% by weight, a viscosity of 150 mPas, a pH of 7.5 and a surface tension of 36 mN/m.
Das erhaltene oberflächengeleimte, getrocknete und geglättete Trägerpapier wird mit der Streichmasse für die Farbempfangsschicht einseitig bestrichen.The resulting surface-sized, dried and smoothed backing paper is coated on one side with the coating composition for the dye-receiving layer.
Die in der folgenden Tabelle aufgeführten Transfermaterialien wurden entsprechend des oben beschriebenen Verfahrens hergestellt. Dabei wurde bei der Herstellung des Trägerpapiers jeweils die in der ersten Spalte der Tabelle 1 genannte Barrierekomponente im Austausch gegen Eukalyptus Zellstoff eingesetzt. Das erste Vergleichsbeispiel entspricht dem hergestellten Trägermaterial ohne Zugabe einer weiteren Barrierekomponente bei der Herstellung des Trägerpapiers im Austausch gegen Zellstoff und wird entsprechend als "ohne Barrierekomponente" bezeichnet. Das Vergleichsbeispiel, welches in der ersten Spalte der Tabelle als "ohne Barrierekomponente mit zusätzlicher Barriereschicht" bezeichnet wird, wurde gemäß dem oben genannten Verfahren hergestellt, allerdings wurde hier dem Trägerpapier keine Barrierekomponente bei dessen Herstellung zugegeben und das Trägerpapier auf der der Farbempfangsschicht gegenüberliegenden Seite zusätzlich mit einer Barriereschicht aus einem thermoplastischen Polymer, wie z.B. einem vollverseiftem Polyvinylalkohol (z.B. Mowiol® 28-99), versehen.
Die in Tabelle 1 aufgeführten Daten zeigen, dass der Einsatz von mindestens 1,5 Gew.-%, bezogen auf die Masse des Zellstoffes, einer erfindungsgemäßen Polymerdispersion im Trägerpapier des erfindungsgemäßen Aufzeichnungsmaterials zu der gewünschten Barrierewirkung, d.h. zu einem geringen Tintendurchschlag, führt. Dabei bleiben positive Eigenschaften wie die guten optischen Dichten beim Druck erhalten und es ist ein sehr gutes Curlverhalten sowie eine geringe Klebrigkeit im Transferprozess zu beobachten. Die Kombination aus guten Barriere-Eigenschaften, geringer Klebrigkeit im Transferprozess und sehr gutem Curlverhalten ist nur mit den erfindungsgemäßen Aufzeichnungsmaterialien erreichbar. Die Ergebnisse in Tabelle 1 zeigen, dass diese Eigenschaftskombination mit den im Stand der Technik beschriebenen Aufzeichnungsmaterialien ohne Barriereschicht oder mit zusätzlicher Barriereschicht sowie mit Aufzeichnungsmaterialien, die weniger als 1,5 Gew.-%, bezogen auf die Masse des Zellstoffes, der erfindungsgemäßen Polymerdispersion im Trägerpapier aufweisen, nicht erreicht werden kann.The data listed in Table 1 show that the use of at least 1.5 wt. Positive properties such as the good optical densities are retained during printing and very good curling behavior and low stickiness can be observed in the transfer process. The combination of good barrier properties, low stickiness in the transfer process and very good curl behavior can only be achieved with the recording materials according to the invention. The results in Table 1 show that this combination of properties with the recording materials described in the prior art without a barrier layer or with an additional barrier layer and with recording materials that contain less than 1.5% by weight, based on the mass of the pulp, of the polymer dispersion according to the invention in Have backing paper, can not be achieved.
Die erhaltenen Transfermaterialien wurden mit einem Farbbild bedruckt, dabei wurde der Inkjet-Drucker EPSON Workforce Pro WF 5110 mit Sublimations-Farbtinten SubliJet IQ der Firma Sawgrass verwendet.The transfer materials obtained were printed with a color image using the EPSON Workforce Pro WF 5110 inkjet printer with SubliJet IQ sublimation color inks from Sawgrass.
Das zu testende Sublimationstransferpapier wird im Format DIN A 4 mindestens 1h bei Normklima 23°C und 50% Luftfeuchtigkeit im Druckraum gelagert.The sublimation transfer paper to be tested is stored in the DIN A 4 format for at least 1 hour in a standard climate of 23° C. and 50% humidity in the printing room.
Der Druck erfolgt an handelsüblichen Sublimationsdesktopdruckern. Der Druckfile beinhaltet 10 runde Farbfelder mit unterschiedlichen abfallenden zu bedruckenden Tintenmengen im Schwarzdruck. Das Druckfeld links oben wird mit 100% Tintenmenge bedruckt und die nachfolgenden mit jeweils 10% weniger Tintenmenge. Unter den Druckfeldern steht die Bezeichnung des Feldes in % und wird angegeben als 100% - aufgebrachter Tintenmenge in %. Zum Beispiel wird das Tintenfeld, welches mit 80% Tintenmenge bedruckt wird, mit der Beschriftung 20% bezeichnet. Nachfolgendes Bild zeigt den Printfile.
Nach erfolgtem Druck wird das Papier für 1h im Normklima zum Trocknen gelegt. Anschließend erfolgt der Sublimationsprozess in der Transferpresse Sefa ROTEX AUTO X REL mit Höhenindikator. Hierzu wird die offene Transferpresse auf 200°C aufgeheizt. Nach Erreichen der Temperatur wird zunächst das Textil auf der Bodenheizplatte platziert und darauf das bedruckte Papier mit der bedruckten Seite in Richtung Textil. Direkt im Anschluss wird das sogenannte Deckpapier, welches ein 80 g/m2 Kopierpapier aus gebleichtem Zellstoff ist, auf der Rückseite des bedruckten Sublimationspapiers platziert und die Transferpresse geschlossen. Die Sublimationsdauer liegt bei 30 Sekunden bei mittlerem Anpressdruck.After printing, the paper is left to dry for 1 hour in a standard climate. The sublimation process then takes place in the Sefa ROTEX AUTO X REL transfer press with a height indicator. For this purpose, the open transfer press is heated to 200°C. After the temperature has been reached, the textile is first placed on the floor heating plate and then the printed paper with the printed side facing the textile. Immediately afterwards, the so-called cover paper, which is 80 g/m 2 copy paper made from bleached cellulose, is placed on the back of the printed sublimation paper and the transfer press is closed. The sublimation time is 30 seconds with medium contact pressure.
Nach Ablauf der Sublimationsdauer wird die Transferpresse geöffnet und die 3 Lagen vorsichtig voneinander getrennt. Das Textil wird verworfen. Die Sublimationstinte sublimiert bei schlechtem Tintendurchschlag zur Rückseite und schlägt sich je nach Intensität des Tintendurchschlags mehr oder weniger auf dem Kopierpapier nieder. Die Tintenmenge spielt dabei eine wichtige Rolle. Je höher die Tintenmenge auf dem bedruckten Sublimationspapier, desto höher die Neigung zu Tintendurchschlag in Richtung Rückseite respektive Deckblatt.After the sublimation time has elapsed, the transfer press is opened and the 3 layers are carefully separated from each other. The textile is discarded. With poor ink penetration, the sublimation ink sublimates to the back and, depending on the intensity of the ink penetration, is more or less deposited on the copy paper. The amount of ink plays an important role. The higher the amount of ink on the printed sublimation paper, the greater the tendency for ink to bleed through to the back or cover sheet.
Da sich auf dem bedruckten Sublimationspapier Farbfelder in unterschiedlicher Tintenmenge befinden ist die Abstufung des Tintendurchschlags auf dem Deckblatt ebenso sichtbar. Zur Bewertung des Tintendurchschlags erfolgt eine visuelle Begutachtung des Deckblattes. Das Farbfeld, welches gerade noch im Tageslicht erkennbar ist, wird markiert und als %-Wert hinsichtlich Tintendurchschlag angegeben.Since there are color fields in different amounts of ink on the printed sublimation paper, the gradation of the ink penetration is on the cover sheet just as visible. A visual assessment of the cover sheet is carried out to assess the ink strikethrough. The color field, which is just visible in daylight, is marked and given as a percentage value with regard to ink penetration.
Bei einem Sublimationspapier mit schlechtem Tintendurchschlag werden Werte von 70-90% erhalten. Bei Papieren mit verbessertem Tintendurchschlag werden Werte von 60-40% erhalten. Papiere mit sehr gutem Verhalten gegen Tintendurchschlag erhalten Werte von 30-0%. Es kann eine genaue Skalierung der Neigung zu Tintendurchschlag in %-Werten angegeben werden. Abbildung 2 zeigt exemplarisch das Deckblatt, mit Markierung des gerade noch visuell erkennbaren Grauschleiers bei 80%, was einem schlechten Wert hinsichtlich Tintendurchschlag entspricht. Bei einem Papier, welches eine sehr gute Sperrwirkung gegen Sublimationstinte aufweist, ist auf dem Deckblatt (Abbildung 3) nichts zu erkennen.
Die Klebrigkeit der Rückseite des Transfermaterials wird mittels haptischer Bewertung bestimmt. Dazu wird das Transfermaterial zwischen zwei Finger positioniert und mit möglichst gleichmäßigem Druck fixiert. Beim Ablösen der Finger wird die Klebrigkeit im Vergleich zu bekannten Transfermaterial Muster in einem Notensystem von 1 bis 5 bestimmt. Für eine reibungslose Durchführung des Transferprozesses ist eine Note von 2 oder besser wünschenswert.
- Note 1: keine Klebrigkeit
- Note 2: geringe Klebrigkeit
- Note 3: mittlere Klebrigkeit
- Note 4: hohe Klebrigkeit
- Note 5: sehr starke Klebrigkeit
- Grade 1: no stickiness
- Rating 2: low stickiness
- Rating 3: medium stickiness
- Rating 4: high stickiness
- Grade 5: very strong stickiness
Die Prüfung des Curl Mittelwerts wird mit jeweils drei DINA4 Mustern der in Tabelle 1 gelisteten erfindungsgemäßen Transfermaterialien bzw. Transfermaterialien des Standes der Technik (Vergleichsbeispiele) durchgeführt. Bei der Herstellung der DINA4-Muster aus dem Prüfstreifen der Papiermaschine ist zu beachten, dass diese an folgenden Stellen entnommen werden (s. auch erläuternde Abbildung weiter unten):
- 1. FS-Rand: DINA4-Muster ca. 1,5 cm vom Führerseite-Rand
- 2. M: DINA4-Muster aus der Mitte der Papierbahn
- 3. AS: DINA4-Muster ca. 1,5 cm vom Antriebs-Rand (AS-Rand)
- 1. FS margin: DINA4 sample approx. 1.5 cm from the driver's side margin
- 2nd M: DINA4 pattern from the middle of the paper web
- 3. AS: DINA4 sample approx. 1.5 cm from the drive edge (AS edge)
Die vorbereiteten Muster werden auf der Kundenseite beschriftet (FS, M, AS) und mit der Kundenseite nach oben 30 Minuten bei 50±2 % relativer Luftfeuchtigkeit und 23±1 °C auf einer glatten Fläche gelagert.
Der Curl-Mittelwert wird bestimmt, indem pro DIN A4-Muster aus den gemessenen 4 Eckpunkten des jeweiligen Musters, die wie in der obigen Abbildung dargestellt mit den Ziffern 1 - 4,5 - 8 sowie 9 -12 bezeichnet sind, der Mittelwert berechnet wird und aus diesen 3 Mittelwerten der einzelnen DINA4-Muster der Mittelwert gebildet wird, d.h. der Curl-Mittelwert ist der Mittelwert aus den 3 berechneten Mittelwerten der einzelnen DINA4-Muster. Dabei gilt für die Bestimmung jedes einzelnen Curl-Wertes an einem einzelnen Eckpunkt der DINA4-Muster folgendes Bewertungsschema:
- 0 = kein Curl
- 1 -3 cm = geringer Curl
- > 3 cm = Curl nicht akzeptabel
- 0 = no curl
- 1-3 cm = low curl
- > 3 cm = curl unacceptable
Gemessen wird dabei der Abstand von dem Punkt an dem sich der Eckpunkt vor Beginn der Bestimmung befand, d.h. vor Lagerung bei den oben genannten vorgegeneben Bedingungen (Temperatur, relative Luftfeuchtigkeit) über 30 Minuten, zu dem Teil des DINA4-Musters, der nach 30 Minuten bei den oben genannten vorgegebenen Bedingungen (Temperatur, relative Luftfeuchtigkeit) ausgehend von dem ursprünglichen Punkt des Eckpunkts aus diagonal zur Mitte des DINA4-Musters (Schnittpunkt in der Mitte des DINA4-Musters, der sich bildet, wenn man gedankliche Geraden von jedem Eckpunkten diagonal zum nächsten Eckpunkt zieht) gerade noch auf der glatten Fläche plan anliegt, d.h. der Teil des DINA4-Musters, der nach dem eventuell erfolgten Aufrollen der Ecke des Musters noch auf der glatten Fläche aufliegt.The distance is measured from the point at which the corner point was before the start of the determination, ie before storage under the above-mentioned specified conditions (temperature, relative humidity) for 30 minutes, to the part of the DINA4 sample that was after 30 minutes under the above specified conditions (temperature, relative humidity) starting from the original point of the corner point diagonally to the center of the DINA4 pattern (intersection in the middle of the DINA4 pattern, which is formed if you draw imaginary straight lines from each corner point diagonally to the next corner) just barely lies flat on the smooth surface, ie that part of the DINA4 sample that still lies on the smooth surface after the corner of the sample has been rolled up.
Claims (13)
(a1) Imprägnieren des Trägerpapiers mit einer Imprägnierlösung, die mindestens 1,0 g/m2 einer Polymerdispersion, ausgewählt aus der Gruppe, bestehend aus Polyacrylaten, Polyestern, Polyolefinen oder deren Mischungen umfasst, in einer Leim- oder Filmpresse.Method according to Claim 10, characterized in that the method comprises the following additional step (a1) between step (a) and step (b):
(a1) impregnation of the base paper with an impregnation solution comprising at least 1.0 g/m 2 of a polymer dispersion selected from the group consisting of polyacrylates, polyesters, polyolefins or mixtures thereof, in a size or film press.
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP21160232.1A EP4053333B8 (en) | 2021-03-02 | 2021-03-02 | Transfer material for sublimation printing based on paper having barrier function against inks |
| HRP20240345TT HRP20240345T1 (en) | 2021-03-02 | 2021-03-02 | Transfer material for sublimation printing based on paper having barrier function against inks |
| BR112023017733A BR112023017733A2 (en) | 2021-03-02 | 2022-03-02 | TRANSFER MATERIAL FOR PAPER-BASED SUBLIMATION PRINTING AS SUPPORT WITH DYE BARRIER FUNCTION |
| CN202280018625.3A CN116897234B (en) | 2021-03-02 | 2022-03-02 | Transfer printing material with paper as carrier and ink blocking function for sublimation printing |
| JP2023547353A JP7449457B2 (en) | 2021-03-02 | 2022-03-02 | Transfer material for sublimation transfer printing using paper as a carrier with ink blocking function |
| PCT/EP2022/055268 WO2022184768A1 (en) | 2021-03-02 | 2022-03-02 | Transfer material for sublimation printing based on paper as the carrier, with an ink blocking function |
| KR1020237026443A KR102657470B1 (en) | 2021-03-02 | 2022-03-02 | Transfer material for sublimation printing using paper as a carrier, with ink blocking function |
| US18/548,753 US20240158987A1 (en) | 2021-03-02 | 2022-03-02 | Transfer material for sublimation printing based on paper as the carrier, with an ink blocking function |
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| EP21160232.1A EP4053333B8 (en) | 2021-03-02 | 2021-03-02 | Transfer material for sublimation printing based on paper having barrier function against inks |
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| EP4053333A1 true EP4053333A1 (en) | 2022-09-07 |
| EP4053333C0 EP4053333C0 (en) | 2024-01-17 |
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| EP4053333B8 EP4053333B8 (en) | 2024-02-21 |
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| US (1) | US20240158987A1 (en) |
| EP (1) | EP4053333B8 (en) |
| JP (1) | JP7449457B2 (en) |
| KR (1) | KR102657470B1 (en) |
| CN (1) | CN116897234B (en) |
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| JP2009269324A (en) | 2008-05-09 | 2009-11-19 | Dainippon Printing Co Ltd | Thermally transferring support and thermally transferring acceptor sheet |
| JP2017078128A (en) | 2015-10-21 | 2017-04-27 | 三菱レイヨン株式会社 | Resin composition for transfer paper, method for producing the same and laminate |
| NL2018248B1 (en) * | 2017-01-27 | 2018-08-07 | Crown Van Gelder B V | Paper composition for transfer printing |
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-
2021
- 2021-03-02 EP EP21160232.1A patent/EP4053333B8/en active Active
- 2021-03-02 HR HRP20240345TT patent/HRP20240345T1/en unknown
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2022
- 2022-03-02 US US18/548,753 patent/US20240158987A1/en active Pending
- 2022-03-02 CN CN202280018625.3A patent/CN116897234B/en active Active
- 2022-03-02 BR BR112023017733A patent/BR112023017733A2/en active Search and Examination
- 2022-03-02 JP JP2023547353A patent/JP7449457B2/en active Active
- 2022-03-02 KR KR1020237026443A patent/KR102657470B1/en active IP Right Grant
- 2022-03-02 WO PCT/EP2022/055268 patent/WO2022184768A1/en active Application Filing
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| EP1101682A1 (en) | 1999-04-21 | 2001-05-23 | Nippon Shooter Ltd. | Transfer system |
| WO2000073570A1 (en) * | 1999-06-01 | 2000-12-07 | Arkwright Incorporated | Inkjet transfer systems for dark textile substrates |
| US20030117481A1 (en) * | 2001-10-05 | 2003-06-26 | Dai Nippon Printing Co., Ltd. | Intermediate transfer recording medium |
| DE10246209A1 (en) | 2002-10-04 | 2004-04-15 | Basf Ag | Non-ionic anthraquinone, quinophthalone or azo dye composition, e.g. as inkjet or sublimation transfer printing ink, comprises naphthalene sulfonic acid/formaldehyde condensate of high molecular weight as dispersant |
| EP1878829A1 (en) | 2006-07-12 | 2008-01-16 | Papierfabriken Cham-Tenero AG | Coated base paper |
| US20080229962A1 (en) | 2007-03-19 | 2008-09-25 | Matthew Warren Shedd | Sublimation transfer paper, method of making, and method for sublimation printing |
| DE102014116550A1 (en) | 2014-11-12 | 2016-05-12 | Papierfabrik August Koehler Se | Thermosublimationspapier |
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| Title |
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| B. THOMPSON: "Printing Materials", SCIENCE AND TECHNOLOGY, 1998, pages 468 |
Also Published As
| Publication number | Publication date |
|---|---|
| HRP20240345T1 (en) | 2024-05-24 |
| EP4053333C0 (en) | 2024-01-17 |
| EP4053333B1 (en) | 2024-01-17 |
| CN116897234A (en) | 2023-10-17 |
| KR20230150794A (en) | 2023-10-31 |
| JP2024506011A (en) | 2024-02-08 |
| KR102657470B1 (en) | 2024-04-15 |
| US20240158987A1 (en) | 2024-05-16 |
| JP7449457B2 (en) | 2024-03-13 |
| BR112023017733A2 (en) | 2023-10-03 |
| EP4053333B8 (en) | 2024-02-21 |
| WO2022184768A1 (en) | 2022-09-09 |
| CN116897234B (en) | 2024-09-10 |
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