EP0436133B1 - Die Verwendung von neutralem Papier als Verpackungsmaterial für fotosensibles Material - Google Patents

Die Verwendung von neutralem Papier als Verpackungsmaterial für fotosensibles Material Download PDF

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Publication number
EP0436133B1
EP0436133B1 EP90123231A EP90123231A EP0436133B1 EP 0436133 B1 EP0436133 B1 EP 0436133B1 EP 90123231 A EP90123231 A EP 90123231A EP 90123231 A EP90123231 A EP 90123231A EP 0436133 B1 EP0436133 B1 EP 0436133B1
Authority
EP
European Patent Office
Prior art keywords
pulp
paper
neutral paper
chemically processed
partially chemically
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
EP90123231A
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English (en)
French (fr)
Other versions
EP0436133A1 (de
Inventor
Yoshihiro C/O Fuji Photo Film Co. Ltd. Seto
Yoshihiro C/O Fuji Photo Film Co. Ltd. Nishiyama
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.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Publication of EP0436133A1 publication Critical patent/EP0436133A1/de
Application granted granted Critical
Publication of EP0436133B1 publication Critical patent/EP0436133B1/de
Anticipated expiration legal-status Critical
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/04—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides
    • D21C3/06—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides sulfur dioxide; sulfurous acid; bisulfites sulfites
    • D21C3/12—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides sulfur dioxide; sulfurous acid; bisulfites sulfites sodium bisulfite
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/02—Chemical or chemomechanical or chemothermomechanical pulp
    • D21H11/06—Sulfite or bisulfite pulp

Definitions

  • This invention relates to the use of a neutral paper as a package material for a photosensitive material or a tube being in contact with or close to a photosensitive material.
  • Papers used as materials for photosensitive materials such as a protecting sheet or a paper tube are made from chemical pulp (JP-A-58-43730) and therefore, the yield of the pulp from wood is low resulting in high costs.
  • the high yield pulp includes mechanical pulp produced by a mechanical process such as groundwood pulp, refiner groundwood pulp and thermomechanical pulp and partially chemically processed pulp produced by a partial chemical process such as chemigroundwood pulp and chemithermomechanical pulp.
  • the mechanical pulp is not preferred for packaging materials for photosensitive materials because it contains lignin and resin extracts of wood in addition to cellulose.
  • the partially chemically processed pulp is also not preferred for a packaging material for a photosensitive material because it contains a high amount of lignin. Therefore, the partially chemically processed pulp has not been used for packaging materials for photosensitive materials. If a conventional paper made from partially chemically processed pulp is used as a packaging material for photosensitive materials, it adversely affects the photosensitive material such as by fogging.
  • a neutral paper which comprises 20 to 100% of partially chemically processed pulp produced in a 65 to 95% yield by using a cooking agent consisting essentially of NaOH, Na2CO3, NaHCO3, Na2SO3, NaHSO3 or a combination thereof and which has a pH of 6 to 9, as a package material for a photosensitive material, and the use of said neutral paper as a tube being in contact with or close to a photosensitive material.
  • Na2S as a cooking agent adversely affects photosensitive materials.
  • the increase of the sensitivity is, however, within a tolerance limit, particularly, when the pH is not less than 7, an increase of the sensitivity does not occur.
  • the decrease of the sensitivity is within a tolerance limit; particularly, when the pH is not more than 8,5, a decrease of the sensitivity does not occur.
  • the partially chemically processed pulp includes semichemical pulp, chemiground pulp and chemithermo-mechanical pulp produced in a yield of 65 to 95% , preferably 80 to 90%.
  • the yield is indicated as yield from wood chips to paper, corresponding to the cooling yield.
  • the neutral paper may be composed of the above partially chemically processed pulp only, and unbleached kraft pulp may be added to the partially chemically processed pulp in order to prohibit breaking during paper making and to improve the weakness due to lignin.
  • the partially chemically processed pulp is produced in the partially chemically processed process and contains a high amount of lignin.
  • the pH of the neutral paper is adjusted to 6 to 9, preferably 6.5 to 8.5 according to JIS P 8113 ⁇ 4,2. If the pH of the neutral paper needs to be raised to 6 to 9, an addition of NaOH, KOH or other alkalies is suitable.
  • NaOH sodium sulfate
  • various acids such as H2SO4, HCl and CH3COOH and salts which are acidic in an aqueous solution such as aluminum sulfate can be used.
  • Aluminum sulfate is most preferred.
  • the neutral paper can be blended with corrugated board old papers, unbleached kraft old papers, or deinked pulp in order to save costs and resources.
  • the above blending materials are restricted to those which hardly adversely affect the photosensitive materials. Alternatively they are removed by washing during the breaking process.
  • the content of the partially chemically processed pulp is from 20 to 100%, preferably from 50 to 100%, more preferably from 80 to 100%.
  • the neutral paper usually has an area weight in the range of 100 to 800 g/m2, desirably in the range of 200 to 600 g/m2.
  • the method for making the neutral paper is not restricted.
  • a modified starch, or a corn starch is preferably blended in order to improve the ply bond strength during making a multi-ply paper using a cylinder machine.
  • the neutral paper is preferably located to touch the photosensitive material.
  • the paper tube is formed by joining the above neutral paper with an emulsion adhesive or a water-soluble adhesive having a pH of 6 to 9. When the pH of the adhesive is less than 6 or beyond 9, an increase or decrease of the sensitivity which is out of the tolerance limit occurs.
  • the paper tube is usually a laminate of the neutral paper.
  • the emulsion adhesive includes polyvinyl acetate, polyacryl, ethylene-vinyl acetate (EVA), and styrene-butadiene rubber (SBR).
  • the water-soluble adhesive includes natural polymers such as starch, sea wead, and protein, modified substances of cellulose, and starch, and synthetic polymers such as polyvinyl alcohol (PVA) sodium polyacrylate.
  • the paper tube may be utilized as the core for winding a paper, a foil or a web in addition to a photosensitive strip material.
  • the neutral paper may be utilized for packaging materials of various products such as protection sheets and boxes for protecting photosensitive materials.
  • the neutral paper is inexpensive by using a partially chemically processed pulp of high yield, and does not adversely affect photosensitive materials. Moreover, the rigidity of the neutral paper is improved by a high content of lignin.
  • the paper tube is inexpensive as well and has a high compressive strength, and moreover, it does not adversely affect photosensitive materials by use of an adhesive having a pH of 6 to 9.
  • Comparative Example 1 is the same as Example 1 except of using unadjusted pulp of pH 5.
  • Comparative Example 2 is the same as Example 2 except of using unadjusted pulp of pH 9.5.
  • Soft wood bleached sulphite pulp 100 % (NBSP) Material: soft wood (N material) Cooking Agent: H2SO3, NaHSO3 and Na2SO3 Yield: 46 % pH: 5.0
  • the above papers were placed in an atmosphere of 20°C and 65 % RH for two days to adjust the moisture, and were cut into sizes of 4 cm x 15 cm.
  • the papers were packaged together with color photographic papers in seal by moistureproof bags, kept at 50°C for five days and then taken out.
  • the color photographic papers were exposed and developed, and the exposure index according as 0,5 of reflection density was measured.
  • the moistureproof bags have a water vapor transmission of less than 0,5 g/m2 in 24 hours and an aluminum foil with a thickness of 7 um.
  • Paper tubes were made of the paper of Examples 1, 2 or 3 or Conventional Example 1 using a polyvinyl acetate adhesive with a pH of 6.5.
  • the paper tubes had an inner diameter of 76,2 mm, a length of 100 mm and were 10 ply.
  • the paper tubes were kept at 40°C for one day to dry and then at 20°C and 65 % RH for three days to adjust the moisture.
  • a color photographic paper was wound on the paper tube one time and the paper tube was placed in the above moistureproof bag in a seal. The above treatments were conducted and the results were compared.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Paper (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)
  • Packages (AREA)
  • Wrappers (AREA)

Claims (6)

  1. Verwendung eines neutralen Papiers, welches 20 bis 100 % teilweise chemisch verarbeitete Pulpe, hergestellt mit einer Ausbeute von 65 bis 95 % unter Verwendung eines Aufschlußmittels, bestehend im wesentlichen aus NaOH, Na₂CO₃, NaHCO₃, Na₂SO₃, NaHSO₃ oder einer Kombination davon, umfaßt und das einen pH-Wert von 6 bis 9 aufweist, als Verpackungsmaterial für ein lichtempfindliches Material.
  2. Verwendung nach Anspruch 1, wobei die teilweise chemisch verarbeitete Pulpe unter Verwendung von Na₂SO₃ und Na₂CO₃ als Aufschlußmittel hergestellt wird, und wobei der pH-Wert durch Zugabe von NaOH eingestellt wird.
  3. Verwendung nach Anspruch 1, wobei die teilweise chemisch verarbeitete Pulpe unter Verwendung von NaOH und Na₂CO₃ als Aufschlußmittel hergestellt wird, und wobei der pH-Wert durch Zufügung von Aluminiumsulfat eingestellt wird.
  4. Verwendung nach Anspruch 1, wobei das neutrale Papier so plaziert ist, daß es das lichtempfindliche Material berührt.
  5. Verwendung eines neutralen Papiers, das 20 bis 100 % teilweise chemisch verarbeitete Pulpe, hergestellt mit einer Ausbeute von 65 bis 95 % unter Verwendung eines Aufschlußmittels, bestehend im wesentlichen aus NaOH, Na₂CO₃, NaHCO₃, Na₂SO₃, NaHSO₃ oder einem Gemisch daraus, umfaßt und das einen pH-Wert von 6 bis 9 aufweist, als eine Röhre, die sich in Kontakt mit einem lichtempfindlichen Material oder in der Nähe eines lichtempfindlichen Materials befindet.
  6. Verwendung nach Anspruch 5, wobei das neutrale Papier unter Verwendung eines Emulsionshaftmittels oder eines wasserlöslichen Haftmittels mit einem pH-Wert von 6 bis 9 gebunden wird.
EP90123231A 1989-12-06 1990-12-04 Die Verwendung von neutralem Papier als Verpackungsmaterial für fotosensibles Material Expired - Lifetime EP0436133B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP315469/89 1989-12-06
JP31546989A JPH03180583A (ja) 1989-12-06 1989-12-06 中性紙およびこれを用いた紙管

Publications (2)

Publication Number Publication Date
EP0436133A1 EP0436133A1 (de) 1991-07-10
EP0436133B1 true EP0436133B1 (de) 1994-08-10

Family

ID=18065733

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90123231A Expired - Lifetime EP0436133B1 (de) 1989-12-06 1990-12-04 Die Verwendung von neutralem Papier als Verpackungsmaterial für fotosensibles Material

Country Status (3)

Country Link
EP (1) EP0436133B1 (de)
JP (1) JPH03180583A (de)
DE (1) DE69011491T2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101880977A (zh) * 2010-03-25 2010-11-10 吉林晨鸣纸业有限责任公司 樟子松白松杨木化学机械浆的生产方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69329961T2 (de) * 1992-07-15 2001-06-13 Fuji Photo Film Co., Ltd. Verpackung für eine Rolle lichtempfindlichen Materials
JP3414845B2 (ja) * 1994-06-10 2003-06-09 富士写真フイルム株式会社 感光性印刷版の梱包材及び梱包体

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PULP AND PAPER, Chemistry and Chemical Technology, 3rd edition, volume 1, 1980, JAMES P. CASEY, NEW YORK *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101880977A (zh) * 2010-03-25 2010-11-10 吉林晨鸣纸业有限责任公司 樟子松白松杨木化学机械浆的生产方法

Also Published As

Publication number Publication date
DE69011491T2 (de) 1994-12-08
DE69011491D1 (de) 1994-09-15
JPH03180583A (ja) 1991-08-06
EP0436133A1 (de) 1991-07-10

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