EP0049405B1 - Procédé de traitement de gaze pour tamis d'impression avec au moins un agent de blanchiment - Google Patents

Procédé de traitement de gaze pour tamis d'impression avec au moins un agent de blanchiment Download PDF

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Publication number
EP0049405B1
EP0049405B1 EP81107406A EP81107406A EP0049405B1 EP 0049405 B1 EP0049405 B1 EP 0049405B1 EP 81107406 A EP81107406 A EP 81107406A EP 81107406 A EP81107406 A EP 81107406A EP 0049405 B1 EP0049405 B1 EP 0049405B1
Authority
EP
European Patent Office
Prior art keywords
gauzes
dispersion
pattern
fibers
films
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
Application number
EP81107406A
Other languages
German (de)
English (en)
Other versions
EP0049405A3 (en
EP0049405A2 (fr
Inventor
Johannes Antonius Craamer
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.)
Schweizerische Seidengazefabrik AG
Original Assignee
Schweizerische Seidengazefabrik AG
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 Schweizerische Seidengazefabrik AG filed Critical Schweizerische Seidengazefabrik AG
Priority to AT81107406T priority Critical patent/ATE8065T1/de
Publication of EP0049405A2 publication Critical patent/EP0049405A2/fr
Publication of EP0049405A3 publication Critical patent/EP0049405A3/de
Application granted granted Critical
Publication of EP0049405B1 publication Critical patent/EP0049405B1/fr
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N1/00—Printing plates or foils; Materials therefor
    • B41N1/24—Stencils; Stencil materials; Carriers therefor
    • B41N1/247—Meshes, gauzes, woven or similar screen materials; Preparation thereof, e.g. by plasma treatment

Definitions

  • the present invention relates to a method for shortening the exposure time during photochemical pattern transfer to photosensitive layers made of emulsions or films or combinations of layers and films, all of which are applied to stencil gauzes.
  • the pattern is generally transferred to the stencil.
  • the pattern can be transferred to the template in a variety of ways, with the current focus on the photochemical processes.
  • These photochemical processes usually use layers of emulsions or films or combinations of layers and films. These layers usually consist of polyvinyl alcohol emulsions which have been made photosensitive with a sensitizer, for example sodium or potassium bichromate or a diazo compound.
  • the films consist, for example, of a light-sensitive gelatin layer or of a polyvinyl alcohol layer. In the layers and / or films mentioned chemical reactions are caused by the acting light energy, which can be used to generate sample samples.
  • the layers (emulsions) and films usually used generally have a high sensitivity to blue-green and blue-ultraviolet light in the range from approximately 390 to 450 nm. Exposure usually cures the emulsion and / or the film.
  • the photochemical processes generally have the disadvantage that the exposure time is long. For example, the exposure time can be 1 to 6 minutes per exposure. It is the aim of the present invention to shorten the exposure time mentioned.
  • a process of the type mentioned at the outset has now been found, which is characterized in that the stencil gauzes are brought into contact with a dispersion or a solution which contains at least one whitener, and the dispersion or solution is allowed to act on the stencil gauzes which have been treated in this way Stencil gauze dries, then applies at least one light-sensitive layer and / or at least one light-sensitive film, and then exposed for the pattern transfer, the applied layers and / or films hardening in the exposed areas.
  • An aqueous dispersion or an aqueous solution of the white toner is preferably used. However, it is generally also possible to use a dispersion of the white toner in an organic medium or an organic solvent which contains the white toner.
  • the dispersion or solution can additionally contain at least one leveling agent and / or in the case of a dispersion at least one emulsifier. Likewise, at least one further auxiliary can be added to the dispersion or solution.
  • Coumarin derivatives are particularly preferably used as whiteners in the process according to the invention; 7-aminocoumarin is most preferably used.
  • synthetic fibers made of polyester or nylon are preferably used for the template gauzes. Polyester fibers are preferred. As a rule, natural fibers are not used in the process according to the invention. However, other synthetic fibers can also be used.
  • the fibers can be finished, for example, using the conventional pull-out method or the thermal insulation method, which is also known.
  • optical brighteners are applied to textile fabrics, such as, for example, woven goods, knitted fabrics, nonwovens, etc., or to unprocessed fibers which are intended for use as stencil gauzes.
  • the residence time of the fibers in the dispersion or in the solution depends, for example, on the type of fiber material. If the fiber is made of nylon, the dwell time in the exhaust process is usually 30 to 60 minutes; if the fiber is made of polyester, the residence time in the exhaust process is expediently 60 to 90 min.
  • the temperature when applying the optical brightener is generally not critical.
  • the concentration of the optical brightener in the dispersion or solution can be 1 g / l but also up to 20 g / l or 0.1 to 2% of the weight of the goods. However, because the concentration usually depends on the structure of the optical brightener and substrate used (e.g. polyester or polyamide), both larger and lower concentrations than the ranges mentioned above can be used.
  • the pattern transfer by means of a photochemical process generally has the effect that energy-saving che radiation is absorbed by the applied molecules and is emitted as low-energy radiation, ie as radiation with a longer wavelength.
  • This fluorescence emission is usually added to the normal reflection in the blue spectral range, so that the total reflection is much stronger, ie is above 100%.
  • the excited molecules absorb ultraviolet components and the energy absorbed in this way usually radiates again as blue fluorescent light.
  • the layers and / or films applied to the stencil gauzes which have been equipped in accordance with the method according to the invention cure much more quickly during the pattern transfer by means of a photochemical method, as a result of which the exposure time can be shortened considerably.
  • the time saved is 20 to 30%, but can also be up to 50% in certain cases.
  • great time savings are achieved, for example, when the fibers used for the stencil gauzes, which have been finished in accordance with the method according to the invention, are processed in textile printing with an add-on copying machine which is well known to the person skilled in the art or with a step-and-repeat machine.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Textile Engineering (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Coloring (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Printing Plates And Materials Therefor (AREA)

Claims (9)

1. Procédé de raccourcissement du temps d'exposition pour le transfert photochimique de dessins sur des couches photosensibles à base d'émulsions ou sur des films ou sur des combinaisons de couches et de films, qui tous sont appliqués sur des gazes pour cadres d'impression, caractérisé en ce qu'on met en contact les gazes pour cadres d'impression avec une dispersion ou une solution qui contient au moins un agent de blanchiment optique, en ce qu'on laisse agir la dispersion ou solution sur les gazes, en ce qu'on sèche les gazes ainsi traitées, en ce qu'on applique ensuite au moins une couche photosensible et/ou au moins un film photosensible et puis, en ce qu'on réalise l'exposition à la lumière pour le transfert du dessin, les couches et/ou films appliqués durcissant alors aux endroits exposés.
2. Procédé suivant la revendication 1, caractérisé en ce que la dispersion ou solution contient en supplément encore au moins un agent d'unisson et/ou, dans le cas d'une dispersion, au moins encore un agent émulsionnant.
3. Procédé suivant la revendication 1, caractérisé en ce que la dispersion ou solution contient en supplément encore au moins un autre adjuvant.
4. Procédé suivant la revendication 1, caractérisé en ce que l'agent de blanchiment optique est à base de coumarine.
5. Procédé suivant la revendication 4, caractérisé en ce que la coumarine est dérivée de la 7-aminocoumarine.
6. Procédé suivant la revendication 1, caractérisé en ce que les fibres des gazes pour cadres d'impression sont en polyester.
7. Procédé suivant la revendication 1, caractérisé en ce qu'on utilise une dispersion aqueuse ou une solution aqueuse.
8. Procédé suivant la revendication 1, caractérisé en ce que les fibres des gazes pour cadres d'impression sont en polyamide.
9. Procédé suivant la revendication 8, caractérisé en ce que les fibres des gazes pour cadres d'impression sont en Nylon.
EP81107406A 1980-10-03 1981-09-18 Procédé de traitement de gaze pour tamis d'impression avec au moins un agent de blanchiment Expired EP0049405B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81107406T ATE8065T1 (de) 1980-10-03 1981-09-18 Verfahren zur behandlung von schablonegazen mit wenigstens einem weisstoener.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH7419/80 1980-10-03
CH7419/80A CH648789A5 (de) 1980-10-03 1980-10-03 Verfahren zur verkuerzung der belichtungszeit bei der photochemischen musteruebertragung auf lichtempfindliche schichten.

Publications (3)

Publication Number Publication Date
EP0049405A2 EP0049405A2 (fr) 1982-04-14
EP0049405A3 EP0049405A3 (en) 1982-09-22
EP0049405B1 true EP0049405B1 (fr) 1984-06-20

Family

ID=4324832

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81107406A Expired EP0049405B1 (fr) 1980-10-03 1981-09-18 Procédé de traitement de gaze pour tamis d'impression avec au moins un agent de blanchiment

Country Status (6)

Country Link
US (1) US4472457A (fr)
EP (1) EP0049405B1 (fr)
JP (1) JPS5795496A (fr)
AT (1) ATE8065T1 (fr)
CH (1) CH648789A5 (fr)
DE (1) DE3164320D1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59178381U (ja) * 1983-05-10 1984-11-29 エヌ・ビ−・シ−工業株式会社 スクリ−ン印刷版用布帛
WO1988006103A1 (fr) * 1987-02-17 1988-08-25 Nihon Tokushu Orimono Co., Ltd. Tissu tisse en mailles pour cadre d'impression

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3255203A (en) * 1966-06-07 Ii chz xn
US2370874A (en) * 1942-03-16 1945-03-06 Liberty Glass Co Stencil screen and method of making the same
IT439855A (fr) * 1946-06-14
BE498447A (fr) * 1949-10-05
US2878138A (en) * 1955-09-28 1959-03-17 Bayer Ag Method of brightening material
FR1435095A (fr) * 1965-02-22 1966-04-15 Union Gazes A Bluter L Perfectionnement aux tissus utilisés pour les pochoirs d'impression au cadre et de sérigraphie
DE1670969A1 (de) * 1968-01-08 1971-02-25 Bayer Ag 3-[Pyrazolyl-(1)]-7-[v-triazolyl-(2)]-cumarine
CH559757A5 (fr) * 1971-09-01 1975-03-14 Ciba Geigy Ag
DE2400929A1 (de) * 1973-12-03 1975-07-24 Mcgraw Colorgraph Co Verfahren zur herstellung von drucksieben
US4286048A (en) * 1979-12-03 1981-08-25 Arthur D. Little, Inc. Photocrosslinkable compositions for screen printing stencils

Also Published As

Publication number Publication date
CH648789A5 (de) 1985-04-15
EP0049405A3 (en) 1982-09-22
ATE8065T1 (de) 1984-07-15
US4472457A (en) 1984-09-18
JPS5795496A (en) 1982-06-14
EP0049405A2 (fr) 1982-04-14
DE3164320D1 (en) 1984-07-26

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