EP0545043B1 - Papier de base pour supports photographiques - Google Patents

Papier de base pour supports photographiques Download PDF

Info

Publication number
EP0545043B1
EP0545043B1 EP92117518A EP92117518A EP0545043B1 EP 0545043 B1 EP0545043 B1 EP 0545043B1 EP 92117518 A EP92117518 A EP 92117518A EP 92117518 A EP92117518 A EP 92117518A EP 0545043 B1 EP0545043 B1 EP 0545043B1
Authority
EP
European Patent Office
Prior art keywords
paper
base paper
pulp
base
core
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
Application number
EP92117518A
Other languages
German (de)
English (en)
Other versions
EP0545043A1 (fr
Inventor
Alois Dr. Dipl.-Chem. Kerkhoff
Harald Dr. Dipl.-Chem. Siegers
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Felex Schoeller Jr and GmbH and Co KG
Original Assignee
Felex Schoeller Jr and GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Felex Schoeller Jr and GmbH and Co KG filed Critical Felex Schoeller Jr and GmbH and Co KG
Publication of EP0545043A1 publication Critical patent/EP0545043A1/fr
Application granted granted Critical
Publication of EP0545043B1 publication Critical patent/EP0545043B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/14—Secondary fibres

Definitions

  • the waste paper used is identified and classified according to grade groups and within the grade groups (waste paper list of German standard grades and their qualities, Association of German Paper Mills, valid from 1.1.89).
  • photo pulp refers to a pulp that has qualified for photo paper manufacturers in terms of mechanical and photochemical contaminants, i.e. that the dirt particle level 1.7 mm2 / m2 and the level of iron and copper contaminations harmful to the photographic emulsions must not exceed 30 points / kg pulp.
  • the paper core can be made using dimerized alkyl ketenes in the neutral pH range together with cationic resins, e.g. cationic polyamide-polyamine-epichlorohydrin resin, cationic polyacrylamides, cationic starches or polyethyleneimines can be sized (neutral sizing).
  • cationic resins e.g. cationic polyamide-polyamine-epichlorohydrin resin, cationic polyacrylamides, cationic starches or polyethyleneimines can be sized (neutral sizing).
  • Alkyl ketene dimers with alkyl chains of different lengths can be used.
  • 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 are contained in the paper.
  • Reactive sizing agents can be combined with non-reactive sizing agents.
  • a preferred combination is, for example, a combination of alkyl ketene dimer and fatty acid, but a combination of epoxidized fatty acid amide and fatty acid is also possible within the scope of the invention.
  • Base papers produced according to the invention can contain all other usual additives such as white pigments, dyes, color pigments, fillers and other auxiliaries.
  • the paper core according to the invention can then be coated on at least one side with a synthetic resin layer.
  • the paper core according to the invention can also be provided on at least one side with a synthetic resin layer which is applied by means of extrusion coating.
  • the thermoplastic resins used for this are preferably polyolefins, in particular polyethylene (HDPE, LDPE), ethylene / ⁇ -olefin copolymers (LLDPE) or polypropylene.
  • the polyolefin coating can contain a light-reflecting white pigment and, if appropriate, color pigments, optical brighteners, antistatic agents, dispersants and other additives.
  • the application amount of the coating is 5 to 50 g / m2.
  • Preferred pigments are titanium dioxides of the rutile or anatase type, which are used in an amount of 5 to 20% by weight.
  • photographic base papers produced using recycled paper pulp with respect to the required properties, such as. B. surface quality, edge penetration of photographic liquids or photochemical neutrality, with photographic base papers, which are produced using photo pulps, are comparable.
  • a mixture of 30% by weight of recycled paper grade F and 70% by weight of hardwood sulfate pulp was ground at a consistency of 4% to a ground of 35 ° SR.
  • the pulp suspension was then sized (thick material: 0.04% by weight whitening agent, 0.35% by weight anion.
  • Polyacrylamide, 1.55% by weight stearin, 0.8% by weight alum, 0.54% by weight % cat.polyacrylamide; thin material: 0.41% by weight polyamide / polyamine-epichlorohydrin resin) added at pH 4.5.
  • a base paper weighing approximately 170 g / m 2 was produced in a known manner from the suspension, which had been diluted to approximately 1.2% by weight.
  • the paper was surface-sized in a likewise known manner with a solution which contained 3.45% by weight of polyvinyl alcohol, 4% by weight of CaCl2 x 2 H2O and 0.53% by weight of white toner.
  • Example 3 Sizing agents as in Example 3 were added to a cellulose suspension according to Comparative Example 1 and base papers weighing approximately 170 g / m 2 were produced.
  • the paper samples coated with polyethylene were trimmed and immersed in the required sample size for 14 minutes in a commercially available color developer bath (T - 30 ° C.). After intermediate washing, treatment with a commercially available fixing solution and subsequent washing, the samples were dried and the penetration depth (in mm) of the developer solution was measured at the cutting edge using a measuring magnifier.
  • the zone of developer penetration can be recognized as a more or less brown discolored edge strip in transmitted light.
  • the figures in the following tables are mean values from 6 individual measurements.
  • the edge penetration value customary for the base papers produced in the conventional manner must not exceed 0.5 mm.
  • the structural strength was determined according to TAPPI RC 308 with a Scott Bond gap strength tester (Internal Bond Impact Tester Model B).
  • the figures in the following tables are mean values from 5 individual measurements.
  • the structural strength values customary for the base papers produced in a conventional manner are in the range from 150 to 300 fl.lb/sq.in for neutral sizing and in the range from 110 to 150 fl.lb/sq.in in the case of acidic sizing. The higher the value, the greater the internal strength of the paper.
  • test emulsion is applied to the base paper using a casting machine and dried.
  • the coated pattern is then exposed to a medium shade of gray, developed and fixed.
  • the assessment with grades (1 - 6) is made visually on the basis of a comparison with a template, the grade 1 for "very good” and the grade 6 for "bad".

Landscapes

  • Paper (AREA)
  • Laminated Bodies (AREA)

Claims (12)

  1. Papier de base pour supports photographiques, caractérisé en ce qu'il est constitué d'une âme en papier dont les fibres contiennent de 5 à 100% de papier de recyclage.
  2. Papier de base selon la revendication 1, caractérisé en ce que les fibres contiennent, outre du papier de recyclage, une cellulose photographique et/ou une cellulose ordinaire.
  3. Papier de base selon les revendications 1 et 2, caractérisé en ce que l'âme de papier subit un encollage neutre.
  4. Papier de base selon les revendications 1 et 2, caractérisé en ce que l'âme de papier subit un encollage acide.
  5. Papier de base selon les revendications 1 et 2, caractérisé en ce que l'âme de papier contient un agent d'encollage réactif et non réactif.
  6. Papier de base selon les revendications 1 à 5, caractérisé en ce que l'âme de papier contient un pigment blanc.
  7. Papier de base selon les revendications 1 à 6, caractérisé en ce que l'âme de papier subit un encollage de surface.
  8. Papier de base selon les revendications 1 à 7, caractérisé en ce que l'âme de papier est pourvue, au moins sur une face, d'une couche de résine synthétique.
  9. Papier de base selon la revendication 8, caractérisé en ce que la couche de résine synthétique est durcie par irradiation.
  10. Papier de base selon la revendication 8, caractérisé en ce que la couche de résine synthétique est une couche appliquée par enduction par extrusion.
  11. Papier de base selon les revendications 1 à 7, caractérisé en ce que la couche de résine synthétique est appliquée en utilisant une dispersion aqueuse.
  12. Papier de base selon les revendications 8 à 11, caractérisé en ce que la couche de résine synthétique contient un pigment blanc.
EP92117518A 1991-11-29 1992-10-14 Papier de base pour supports photographiques Expired - Lifetime EP0545043B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4139251A DE4139251A1 (de) 1991-11-29 1991-11-29 Basispapier fuer fotografische schichttraeger
DE4139251 1991-11-29

Publications (2)

Publication Number Publication Date
EP0545043A1 EP0545043A1 (fr) 1993-06-09
EP0545043B1 true EP0545043B1 (fr) 1995-08-23

Family

ID=6445832

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92117518A Expired - Lifetime EP0545043B1 (fr) 1991-11-29 1992-10-14 Papier de base pour supports photographiques

Country Status (4)

Country Link
EP (1) EP0545043B1 (fr)
JP (1) JP3363187B2 (fr)
AT (1) ATE126849T1 (fr)
DE (2) DE4139251A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4302678A1 (de) * 1993-02-01 1994-08-04 Schoeller Felix Jun Papier Recyclierbarer Schichtträger
JP3636052B2 (ja) 2000-09-25 2005-04-06 サンスター技研株式会社 軟質容器の製造方法及び高粘調液充填体
DE102004019734A1 (de) 2004-03-31 2005-11-03 Dresden Papier Gmbh Papiere mit hohem Durchdringungswiderstand gegen Fette und Öle und Verfahren zu deren Herstellung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5677845A (en) * 1979-11-30 1981-06-26 Fuji Photo Film Co Ltd Manufacture of paper for photography
DE68926770T2 (de) * 1988-10-04 1996-10-31 Fuji Photo Film Co Ltd Papier für photographische Anwendungen
US4994147A (en) * 1990-03-05 1991-02-19 Eastman Kodak Company Photographic reflection print material with improved keeping properties

Also Published As

Publication number Publication date
ATE126849T1 (de) 1995-09-15
EP0545043A1 (fr) 1993-06-09
DE4139251A1 (de) 1993-06-03
JPH0667342A (ja) 1994-03-11
DE59203377D1 (de) 1995-09-28
JP3363187B2 (ja) 2003-01-08

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