EP0062819A2 - Procédé pour l'application de solutions antistatiques et bande portant une application antistatique - Google Patents

Procédé pour l'application de solutions antistatiques et bande portant une application antistatique Download PDF

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Publication number
EP0062819A2
EP0062819A2 EP82102610A EP82102610A EP0062819A2 EP 0062819 A2 EP0062819 A2 EP 0062819A2 EP 82102610 A EP82102610 A EP 82102610A EP 82102610 A EP82102610 A EP 82102610A EP 0062819 A2 EP0062819 A2 EP 0062819A2
Authority
EP
European Patent Office
Prior art keywords
web
antistatic
application
profile
antistatic solution
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.)
Withdrawn
Application number
EP82102610A
Other languages
German (de)
English (en)
Other versions
EP0062819A3 (fr
Inventor
Heinz Auweiler
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.)
Agfa Gevaert AG
Original Assignee
Agfa Gevaert 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 Agfa Gevaert AG filed Critical Agfa Gevaert AG
Publication of EP0062819A2 publication Critical patent/EP0062819A2/fr
Publication of EP0062819A3 publication Critical patent/EP0062819A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
    • B05D7/04—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber to surfaces of films or sheets
    • 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
    • G03C1/74—Applying photosensitive compositions to the base; Drying processes therefor
    • 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
    • G03C1/85—Photosensitive materials characterised by the base or auxiliary layers characterised by antistatic additives or coatings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/04—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain a surface receptive to ink or other liquid

Definitions

  • the invention includes a method for applying antistatic solutions to running webs and a web with an antistatic application on the surface.
  • the conductive backing layers mostly contain polymeric film-forming electrolytes, especially alkali salts of polymeric carboxylic or sulfonic acids, e.g. Acrylic or maleic acid copolymers, polystyrene sulfonic acid, but also quaternary polymers (e.g. poly-2-vinyl-N-methyl-pyridinium sulfate).
  • polymeric film-forming electrolytes especially alkali salts of polymeric carboxylic or sulfonic acids, e.g. Acrylic or maleic acid copolymers, polystyrene sulfonic acid, but also quaternary polymers (e.g. poly-2-vinyl-N-methyl-pyridinium sulfate).
  • Such antistatic layers can be anchored on the back of the film by using appropriate swelling agents or swelling solvents.
  • Soot-filled back layers have particularly favorable properties. In contrast to polymeric electrolytes, their surface resistance is independent of the relative humidity. They also offer antihalation protection. However, they still require a preliminary bath during processing to be detached. High molecular weight, alkali-soluble products, e.g. Cellulose acetate hexahydrophthalate used.
  • web surfaces without applied antistatic layers can be printed with all printing inks
  • web surfaces which are coated with antistatic agents have the considerable disadvantage that they have only a very limited printability due to the chemical composition of the antistatic agents.
  • printability is often desirable, for example when processing black and white or color photographic images on the The manufacturer's name or the processing data or numbers can be printed on the back so that a single image can also be identified later. So far, this has only been possible with considerable chemical and technical effort, or it has to be stuck on the surface with printed labels that contain the desired data.
  • the invention has for its object to find a method for applying antistatic solutions, with which it is possible to achieve both good conductivity and good printability of the web surface with small amounts of antistatic agents.
  • this object is achieved according to the invention in that the antistatic solution is applied linearly or in the form of a grid to the surface of the web.
  • the advantageous use of a profile roller application method for generating the line or mesh-shaped profile of the antistatic on the surface of the moving web allows, depending on the profile size of the profile roller, a considerable saving in antistatic solution of 30 to 60%, the measured surface resistances between 5 ⁇ 10 7 to 3.5 * 10 8 ohms.
  • the application of the antistatic solution with the profile roller application process has the further advantage over the conventional application processes by coating or pouring that there are no gaps on the web surface which can result from wetting errors or the tearing off of the application film.
  • the described method thus allows losses to be reduced while saving costs by using less antistatic solutions and the associated lower drying capacity and by having good printability of the electrostatically conductive web surface.
  • the profile roller application process also offers the further advantage of being able to apply prints to the web surface during the antistatic coating, by using colored antistatic solutions.
  • the on Prints may include the name of the manufacturer, any special consumer comments, special distinctive features, or the like.
  • the web produced by the process is characterized in that the surface of the antistatic solution is applied in the form of a line or a mesh, and surfaces without an antistatic solution remain between the lines or the mesh.
  • the mesh or antistatic profiles dissipate or equalize the electrostatic charges from the web, while the areas between the lines or mesh can be easily printed.
  • the width of the applied antistatic lines is 0.5 to 2.5 mm, so that with a choice of the printed letter size of 5 to 10 mm a good legibility of the print is always possible.
  • the line-shaped application of the antistatic solution to the web surface can take a wide variety of forms.
  • An arrangement of application profiles crossing at right angles, which extend in the web running direction and transverse to the web running direction, is particularly simple and expedient.
  • the distance from the profile line to the profile line can be 2 to 15 mm, with a very good charge exchange or good discharge being achieved.
  • the profile lines in which the lines do not cross for example lines made of antistatic solutions which run parallel to one another in parallel or transversely to the web running direction or which are arranged in a zigzag or meandering fashion to the web edge or web running direction .
  • the lines can also describe curves or arcs, for example arranged sinusoidally above or next to one another.
  • an antistatic solution 2 is continuously fed to an immersion bowl 1.
  • An immersion roller 3 immersed in the immersion shell 1 removes the antistatic solution 2 and transfers the solution 2 to a metering roller 4, from which the metered amount is transferred to a profile roller 5.
  • the profile roller 5 transfers the antistatic solution according to its profile to the running web 6, which is guided past the profile roller 5 via a back roller .7.
  • the application thickness of the antistatic solution 2 on the web 6 can be adjusted by the choice of the contact pressure with which the back roller 7 presses the web 6 onto the profile roller 5.
  • the profile roller 5 has rectangular profile lines 8, which generate a rectangular net grid 9 made of antistatic solution 2 on the web 6.
  • Fig. 2 shows a web 6 with a mesh grid 10, which has oblique to the web running profile lines.
  • a finer mesh 11 is shown on a web 6, in which the profile lines run both transversely to and in the running direction of the web and are overlaid by oblique or diagonal profile lines.
  • the profile lines can be selected very narrow, for example 0.5 to 1 mm wide, so that an imprint with printing ink the narrow profile lines of the fine mesh completely bridged and a very good legibility of the print is achieved.
  • FIG. 4 shows a selection of seven antistatic profile line types A to G applied differently to polyester-coated photographic paper and a uniformly coated photographic paper H as the type.
  • the width b of the antistatic profile lines is shown in FIG. 4 in the second column, as is the distance a between the profile lines.
  • the third column shows the measured surface resistances according to DIN 54 482 at constant temperature and humidity and averaged surface resistances, which assume values of 5.0 ⁇ 10 7 ohms to 3.5 ⁇ 10 8 ohms for the different samples A to G .
  • the type samples H had an average surface resistance of 5.4 ⁇ 10 7 ohms.
  • the consumption of antistatic solution is given in% in the last column, which relates to the consumption of a type coating (H) with 100% antistatic solution.
  • the pattern of the F-ig. 4 show the surprising effect that, for example in the case of sample B, with a consumption of only 44% of the antistatic solution required hitherto, a surface resistance of approximately 5 ⁇ 10 7 ohms which is just as low as that required for type H of the 100% antistatic solution.
  • a surface resistance of approximately 5 ⁇ 10 7 ohms which is just as low as that required for type H of the 100% antistatic solution.
  • the pattern B only about 56% of the surface is provided with antistatic agents, which makes good printability possible if the P rofillinienbreite b of 2 mm does not interfere with what is the case when large letters are used for printing.
  • patterns C and G result in less antistatic solution savings
  • patterns D, E and F are very advantageous if a higher surface resistance between 1 and 3.5.108 ohms is permitted.
  • Pattern D is characterized by a very fine profile, the profile lines of which are only 0.5 mm wide and also allow printing with small letters.
  • Pattern E surprisingly shows a very low consumption of antistatic solution of only 39% with a perfectly usable surface resistance of 2.7 . 10 8 ohms.
  • the patterns shown were drawn in such a way that the antistatic profiles stand out against the free white areas. This applies to soot-containing antistatic solutions.
  • the above-mentioned antistatic agents are used, which appear white on the white back of the paper and can only be recognized by a different gloss, so that the profile lines on the paper surface hardly stand out.
  • a certain characteristic for example the name of the manufacturer of the product, can also be applied if this is desired.
  • the patterns shown are in no way a limitation of the invention, but can also have any conceivable other shapes, for example sinusoidal curves.
  • the patterns can be applied both parallel and transversely to the running direction of the web (see arrows, Fig. 4) without the surface resistances change significantly as measurements have shown.
  • the distribution and / or dissipation of electrostatic charge takes place equally well without flashing. At belt speeds of 100 m / min, no flashes could be produced with the sample F with the highest surface resistance of 3.5 ⁇ 10 8 ohms.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Laminated Bodies (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Elimination Of Static Electricity (AREA)
EP82102610A 1981-04-10 1982-03-29 Procédé pour l'application de solutions antistatiques et bande portant une application antistatique Withdrawn EP0062819A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813114640 DE3114640A1 (de) 1981-04-10 1981-04-10 Verfahren zum antragen von antistatikloesungen und bahn mit einem antistatikauftrag
DE3114640 1981-04-10

Publications (2)

Publication Number Publication Date
EP0062819A2 true EP0062819A2 (fr) 1982-10-20
EP0062819A3 EP0062819A3 (fr) 1982-12-15

Family

ID=6129928

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82102610A Withdrawn EP0062819A3 (fr) 1981-04-10 1982-03-29 Procédé pour l'application de solutions antistatiques et bande portant une application antistatique

Country Status (3)

Country Link
EP (1) EP0062819A3 (fr)
JP (1) JPS57181544A (fr)
DE (1) DE3114640A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0736077B2 (ja) * 1984-04-13 1995-04-19 コニカ株式会社 写真感光材料の製造方法
WO2008056525A1 (fr) * 2006-11-08 2008-05-15 Konica Minolta Opto, Inc. Couche de revêtement de couche de prévention contre les charges, film traité de prévention contre les charges, plaque polarisante et appareil d'affichage

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Keine Entgegenhaltungen *

Also Published As

Publication number Publication date
DE3114640A1 (de) 1982-10-28
EP0062819A3 (fr) 1982-12-15
JPS57181544A (en) 1982-11-09

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Inventor name: AUWEILER, HEINZ