EP0697622B1 - Basispapier für fotografische Schichtträger - Google Patents
Basispapier für fotografische Schichtträger Download PDFInfo
- Publication number
- EP0697622B1 EP0697622B1 EP95112374A EP95112374A EP0697622B1 EP 0697622 B1 EP0697622 B1 EP 0697622B1 EP 95112374 A EP95112374 A EP 95112374A EP 95112374 A EP95112374 A EP 95112374A EP 0697622 B1 EP0697622 B1 EP 0697622B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- paper
- starch
- base paper
- anionic
- inorganic particles
- 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.)
- Expired - Lifetime
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- 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
- D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
- D21H17/24—Polysaccharides
- D21H17/28—Starch
- D21H17/29—Starch cationic
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C1/00—Photosensitive materials
- G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
- G03C1/775—Photosensitive materials characterised by the base or auxiliary layers the base being of paper
- G03C1/79—Macromolecular coatings or impregnations therefor, e.g. varnishes
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C1/00—Photosensitive materials
- G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
- G03C1/775—Photosensitive materials characterised by the base or auxiliary layers the base being of paper
Definitions
- the invention relates to a base paper for photographic Layer support, which is formed from a paper pulp, the at least a hydrophobic sizing agent and at least one contains wet-strengthening cationic resin and a process for the production of the base paper.
- Such a carrier material consists of a base paper with polyolefin resin coatings applied to both surfaces, of which the coating initially lying on the photographic layers usually contains at least one light-reflecting pigment, such as TiO 2 .
- the polyolefin coating protects the paper flat against that Penetration of water or aqueous photographic treatment liquids.
- the base paper is sized.
- glue for photographic base papers are both reactive substances, e.g. Alkyl ketene dimer, as well as non-reactive Substances, e.g. higher fatty acids, known.
- Reactive glue are usually together with a cationic resin processed neutral, while non-reactive Glue processed acidic with the addition of aluminum ions will.
- the hydrophobizing glues are added to the fiber suspension and deposited on the surface of the fibers by adding the auxiliary agents.
- an aid is, for example, an aluminum salt
- neutral sizing for example, a cationic polyamide-polyamine-epichlorohydrin resin, which is mainly used together with C 16 to C 18 alkyl ketene dimer.
- cationic polyacrylamides, cationized starches or polyethyleneimines are also suitable in certain cases for improving the retention and for fixing reactive sizing agents in the paper sheet.
- the glue By the addition of the glue to the surface of the cellulose fibers is the bond between the fibers in a glued Paper weaker than in unsized paper. To the To improve paper strength, the pulp will be further Tools added. These include water soluble resins such as Polyvinyl alcohol, anionic polyacrylamide and various Starch derivatives. In DE-OS 32 10 621, for example Use of anionic polyacrylamide together with cationic strength and a combination in DE-OS 33 28 463 of cationic resin with anionic starch phosphoric acid ester described.
- JP-A-5 249 614 and JP-A-5 173 288 Photo base papers known for their production in the Pulp suspension a polyacrylamide, Sodium bicarbonate and alkyl ketene dimer as Sizing agents and polyamide-polyamine-epichlorohydrin and a cationic starch can be used.
- this Document is composed of an anionic polyacrylamide used with a cationic strength.
- a disadvantage of hard sizing of the base paper is, however not only the loss of strength, but also that caused by adversely affected the use of flocculent additives Leaf formation. This is because the addition of cationic substances not only the glue on the Fiber surface is retained, but reinforced fiber flakes arise because of the repulsive negative charges of the fibers largely due to the cationic substances neutralized and fiber-fiber bridging are facilitated.
- the fiber flakes have a dependence on the particular one used Materials and mechanical engineering devices different size and distribution in the paper sheet and determine the homogeneity and surface quality of the base paper (Formation).
- Base papers are important because there is a connection between the Fiber distribution of the paper base and the so-called “mottle” of the photographic image developed later.
- the base paper from a Paper pulp is formed, in addition to at least one hydrophobic Sizing agent and at least one wetting agent Cationic resin is an alkylammonium group-containing starch or one having alkylammonium groups and phosphate groups Contains starch, the cationic starch 0.9 to 2.5 mol% Has ammonium groups.
- Suitable hydrophobizing sizing agents have been found reactive sizing agents such as dimerized alkyl ketene, epoxidized fatty acid amides or fatty acid anhydrides as well non-reactive sizing agents such as higher fatty acids and higher salts Fatty acids.
- a particularly preferred dimerized alkyl ketene consists of at least 50% behenyl ketene or another Alkyl ketene with more than 18 carbon atoms in the alkyl radical.
- two or more hydrophobizing sizing agents can also be used be included in the paper. It can be reactive with non-reactive sizing agents can be combined.
- a cationic resin is considered to be anything in papermaking Resin commonly used resin with cationic groups. she are usually used for wet consolidation and for retention of reactive sizing agents. However, you can use both in combination with reactive as well as with non-reactive sizing agents be used.
- the cationic resin is an epichlorohydrin-modified polyamine or polyamide amine resin.
- Other suitable resins are e.g. Urea / formaldehyde resins, melamine melamine / formaldehyde resins, polyethyleneimines and polyethyleneimine derivatives.
- the contained as another component in the pulp Starch is an alkylammonium group or an alkylammonium and starch containing phosphate groups.
- amphoteric or cationic maize is particularly suitable. or potato starch.
- the content of ammonium groups in the invention Starch is 0.9 to 2.5 mol%.
- the content of Phosphate groups can be up to 0.3 mol%.
- the amount of starch according to the invention used in the pulp is preferably 0.5 to 2.0% by weight, based on Pulp (atro). However, an amount of is particularly preferred 1 to 1.5% by weight.
- anionic inorganic particles a colloidal silica, a colloidal aluminum modified Silica or a colloidal aluminum modified Silicate.
- the amount of anionic inorganic particles in the pulp is preferably up to 0.2% by weight, based on the dry cellulose fibers.
- the base papers according to the invention are produced in a known manner using a paper machine.
- the paper pulp can also contain synthetic fibers, mineral or organic fillers, white pigment, dye or color pigment, optical brighteners, antioxidants and / or other additives customary in the production of photographic paper supports.
- the various components can be added to the pulp suspension in a different order and at different locations known to the paper manufacturer.
- the invention Starch in order before the anionic inorganic Particles mixed into the fiber suspension.
- the anionic inorganic particles are preferred the so-called Thin stock fed before the headbox.
- the paper can also be surface sized, e.g. with polyvinyl alcohol, Starch, gelatin, etc., and will be available after completion and smoothing coated on both sides with synthetic resin in the usual way.
- the synthetic resin coating can be extruded from the Melt, as a dispersion coating, as a radiation-curing coating Mixtures or other known ways. That with resin coated paper is used, if necessary also after application additional layers and after application of an adhesion-improving Pretreatment, as a support for any photographic Layers.
- a mixture of 100% by weight hardwood sulfate pulp was ground at a consistency of 4% to a freeness of 35 ° SR.
- Sizing agents, starch according to the invention and other auxiliaries according to Table 1 were then added to the pulp suspension and an approximately 170 g / m 2 base paper was produced therefrom.
- the paper was surface-sized and smoothed in a known manner with an aqueous solution which contained 3.33% by weight of polyvinyl alcohol and 3.33% by weight of CaCl 2 .
- a base paper weighing 170 g / m 2 was produced therefrom.
- a base paper weighing 190 g / m 2 was produced therefrom.
- the structural strength was determined in accordance with TAPPI RC 308 using a Scott Bond splitting strength tester (Internal Bond Impact Tester Model B).
- the figures in the following tables are mean values from 5 individual measurements. The readings are expressed in 1/1000 feet x pounds (ft.lb/1000).
- the stiffness values of the base papers were checked with the bending stiffness tester by Lorentzen & Wettre, according to the SCAN-P standard 29.69 determined. The measured values are given in mN.
- the formation is tested in an internal test using comparison samples judged by a scale from 1 to 5, whereby the grade 1 for a very even and the grade 5 for a very "cloudy" appearance of the paper structure in transmitted light stand.
- the retention (total retention,%) was determined according to the Paper Research Materials, Inc. developed "Britt” Dynamic Drainage year method (DDJ method) determined.
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- General Physics & Mathematics (AREA)
- Paper (AREA)
Description
Im Rahmen des erfindungsgemäßen Verfahrens können die verschiedenen Komponenten in unterschiedlicher Reihenfolge und an verschiedenen dem Papierhersteller bekannten Stellen der Zellstoffsuspension zugefügt werden.
Leimstoffe* | Probe | |||||
1a | 1b | 1c | 1d | 1e | 1f | |
Maisstärke mit Alkylammonium-Gruppen | ||||||
0,9 Mol.% | - | - | - | - | 1,5 | - |
1,7 Mol.% | 0,5 | 1,0 | 1,2 | 2,0 | - | - |
2,5 Mol.% | - | - | - | - | - | 1,5 |
Polyamid/Polyamin-Epichchlorhydrin-Harz | 0,7 | 0,7 | 0,7 | 0,7 | 0,7 | 0,7 |
Alkylketendimer | 0,5 | 0,5 | 0,5 | 0,5 | 0,5 | 0,5 |
Epoxyd.Fettsäureamid | 0,05 | 0,05 | 0,05 | 0,05 | 0,05 | 0,05 |
Weißtöner | 0,05 | 0,05 | 0,05 | 0,05 | 0,05 | 0,05 |
Leimstoffe | Probe | ||
2a | 2b | 2c | |
Kartoffelstärke mit 1,7 Mol.% Ammonium-Gruppen und 0,2 Mol.% Phosphat-Gruppen | 1,50 | 1,50 | 1,50 |
Polyamid-/Polyamin-Epichlorhydrin-Harz | 0,40 | 0,40 | 0,40 |
Alkylketendimer | 0,50 | 0,50 | 0,50 |
Epoxyd. Fettsäureamid | 0,05 | 0,05 | 0,05 |
anion. Silikat | 0,05 | 0,10 | 0,20 |
Weißtöner | 0,05 | 0,05 | 0,05 |
Leimstoffe | Probe | ||
3a | 3b | 3c | |
Maisstärke mit 1,7 Mol.% Alkylammonium-Gruppen | 0,9 | 0,6 | 0,3 |
Polyamid-/Polyamin-Epichlorhydrin-Harz | 1,2 | 1,2 | 1,2 |
Alkylketendimer | 0,5 | 0,5 | 0,5 |
Epoxyd. Fettsäureamid | 0,05 | 0,05 | 0,05 |
Weißtöner | 0,05 | 0,05 | 0,05 |
Anionische Stärke (Emcoat KPS) | 1,50 Gew.% |
Alkylketendimer | 0,50 Gew.% |
Polyamid/Polyamin-Epichlorhydrin-Harz | 0,70 Gew.% |
Epoxyd. Fettsäureamid | 0,05 Gew.% |
Weißtöner | 0,05 Gew.% |
Polyacrylamid | 0,3 Gew.% |
Alkylketendimer | 0,5 Gew.% |
Polyamid/Polyamin-Epichlorhydrin-Harz | 1,2 Gew.% |
Epoxyd. Fettsäureamid | 0,05 Gew.% |
Weißtöner | 0,05 Gew.% |
Die Meßwerte werden in 1/1000 Fuß x Pfund (ft.lb/1000) angegeben.
Auch eine Erhöhung der Gesamtretention und dadurch eine sauberere Kreislaufführung kann mit der erfindungsgemäßen Leimung erreicht werden.
Claims (12)
- Basispapier für fotografische Schichtträger, das aus einer Papiermasse gebildet ist, die wenigstens ein hydrophobierendes Leimungsmittel und wenigstens ein naßfest machendes kationisches Harz enthält, dadurch gekennzeichnet, daß die Papiermasse außerdem eine Alkylammonium-Gruppen aufweisende Stärke oder eine Alkylammonium-Gruppen und Phosphat-Gruppen aufweisende Stärke enthält und der Gehalt an Ammonium-Gruppen in der Stärke 0,9 bis 2,5 Mol % beträgt.
- Basispapier nach Anspruch 1, dadurch gekennzeichnet, daß der Gehalt an Phosphat-Gruppen in der Stärke bis 0,3 Mol % beträgt.
- Basispapier nach Anspruch 1 und 2, dadurch gekennzeichnet, daß die Papiermasse zusätzlich anionische anorganische Partikel enthält.
- Basispapier nach Anspruch 3, dadurch gekennzeichnet, daß die anionischen anorganischen Partikel ausgewählt sind aus kolloidalen Kieselsäuren, aus kolloidalen aluminiummodifizierten Kieselsäuren oder aus kolloidalen aluminiummodifizierten Silikaten.
- Basispapier nach Anspruch 1 bis 4, dadurch gekennzeichnet, daß die Menge der Stärke 0,5 bis 2 Gew. %, insbesondere aber 1 bis 1,5 Gew. % beträgt, bezogen auf den Zellstoffaseranteil.
- Basispapier nach Anspruch 3 bis 5, dadurch gekennzeichnet, daß die Menge der anionischen anorganischen Partikel bis 0,2 Gew. %, insbesondere aber 0,02 bis 0,1 Gew. % beträgt, bezogen auf den Zellstoffaseranteil.
- Basispapier nach Anspruch 1 bis 6, dadurch gekennzeichnet, daß die Oberfläche des Kernpapiers zusätzlich mit einem in Wasser gelösten oder dispergierten Bindemitttel beschichtet ist.
- Verfahren zur Herstellung eines Basispapiers für fotografische Schichtträger, dadurch gekennzeichnet, daß einer aus Zellstoff sowie gegebenenfalls weiteren Zusatzstoffen bestehenden Papierstoffsuspension wenigstens ein hydrophobierendes Leimungsmittel, wenigstens ein naßfest machendes kationisches Harz und wenigstens eine Alkylammonium-Gruppen aufweisende Stärke oder eine Alkyalammonium-Gruppen und Phosphat-Gruppen aufweisende Stärke mit einem Gehalt an Ammonium-Gruppen in der Stärke von 0,9 bis 2,5 Mol % zugesetzt werden und aus dieser Suspension ein Papier gefertigt wird.
- Verfahren nach Anspruch 8, dadurch gekennzeichnet, daß der Papierstoffsuspension zusätzlich anionische anorganische Partikel zugesetzt werden.
- Verfahren nach Anspruch 9, dadurch gekennzeichnet, daß die anionischen anorganischen Partikel eine kolloidale Kieselsäure, eine kolloidale aluminiummodifizierte Kieselsäure oder ein kolloidales aluminiummodifiziertes Silikat ist.
- Verfahren nach Anspruch 9 und 10, dadurch gekennzeichnet, daß die anionischen anorganischen Partikel stets im Dünnstoff und kurz vor dem Stoffauflauf zugesetzt werden.
- Verfahren nach Anspruch 8 bis 11, dadurch gekennzeichnet, daß die Oberfläche des Papiers zusätzlich mit einem in Wasser gelösten oder dispergierten Bindemittel beschichtet ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4428940 | 1994-08-16 | ||
DE4428940A DE4428940C2 (de) | 1994-08-16 | 1994-08-16 | Basispapier eines Schichtträgers für fotografische Aufzeichnungsmaterialien |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0697622A1 EP0697622A1 (de) | 1996-02-21 |
EP0697622B1 true EP0697622B1 (de) | 1998-06-03 |
Family
ID=6525754
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95112374A Expired - Lifetime EP0697622B1 (de) | 1994-08-16 | 1995-08-06 | Basispapier für fotografische Schichtträger |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0697622B1 (de) |
JP (1) | JP3636782B2 (de) |
DE (2) | DE4428940C2 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004019734A1 (de) | 2004-03-31 | 2005-11-03 | Dresden Papier Gmbh | Papiere mit hohem Durchdringungswiderstand gegen Fette und Öle und Verfahren zu deren Herstellung |
US20060005935A1 (en) * | 2004-07-06 | 2006-01-12 | Harris Edith E | Multi-function starch compositions |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6017103B2 (ja) * | 1981-03-24 | 1985-05-01 | 三菱製紙株式会社 | 印画紙用支持体 |
DE3328463A1 (de) * | 1983-08-06 | 1985-02-21 | Felix Schoeller jr. GmbH & Co KG, 4500 Osnabrück | Fotografischer papiertraeger |
DE3606806C1 (de) | 1986-03-03 | 1987-06-25 | Schoeller F Jun Gmbh Co Kg | Wasserfester fotografischer Papiertraeger |
JPH05173288A (ja) * | 1991-12-24 | 1993-07-13 | Oji Paper Co Ltd | 写真印画紙用支持体 |
JPH05249614A (ja) * | 1992-03-10 | 1993-09-28 | Oji Paper Co Ltd | 写真印画紙用支持体 |
-
1994
- 1994-08-16 DE DE4428940A patent/DE4428940C2/de not_active Expired - Fee Related
-
1995
- 1995-08-06 EP EP95112374A patent/EP0697622B1/de not_active Expired - Lifetime
- 1995-08-06 DE DE59502396T patent/DE59502396D1/de not_active Expired - Lifetime
- 1995-08-16 JP JP23080095A patent/JP3636782B2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE59502396D1 (de) | 1998-07-09 |
DE4428940C2 (de) | 1998-04-16 |
EP0697622A1 (de) | 1996-02-21 |
JP3636782B2 (ja) | 2005-04-06 |
DE4428940A1 (de) | 1996-02-22 |
JPH08248563A (ja) | 1996-09-27 |
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