EP0117212A1 - Vorrichtung zur Beschichtung einer Folie oder eines Bandes in kontinuierlicher Bewegung - Google Patents

Vorrichtung zur Beschichtung einer Folie oder eines Bandes in kontinuierlicher Bewegung Download PDF

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Publication number
EP0117212A1
EP0117212A1 EP84420010A EP84420010A EP0117212A1 EP 0117212 A1 EP0117212 A1 EP 0117212A1 EP 84420010 A EP84420010 A EP 84420010A EP 84420010 A EP84420010 A EP 84420010A EP 0117212 A1 EP0117212 A1 EP 0117212A1
Authority
EP
European Patent Office
Prior art keywords
sheet
slot
composition
reservoir
tank
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.)
Granted
Application number
EP84420010A
Other languages
English (en)
French (fr)
Other versions
EP0117212B1 (de
Inventor
Michel Richard
Alain Angogna
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.)
Centre Technique Industriel dit "CENTRE TECHNIQUE DE L'INDUSTRIE DES PAPIERS CARTONS ET CELLULOSES"
Original Assignee
Centre Technique Industriel dit "CENTRE TECHNIQUE DE L'INDUSTRIE DES PAPIERS CARTONS ET CELLULOSES"
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 Centre Technique Industriel dit "CENTRE TECHNIQUE DE L'INDUSTRIE DES PAPIERS CARTONS ET CELLULOSES" filed Critical Centre Technique Industriel dit "CENTRE TECHNIQUE DE L'INDUSTRIE DES PAPIERS CARTONS ET CELLULOSES"
Priority to AT84420010T priority Critical patent/ATE21053T1/de
Publication of EP0117212A1 publication Critical patent/EP0117212A1/de
Application granted granted Critical
Publication of EP0117212B1 publication Critical patent/EP0117212B1/de
Expired legal-status Critical Current

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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
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/46—Pouring or allowing the fluid to flow in a continuous stream on to the surface, the entire stream being carried away by the paper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
    • B05C3/18—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material only one side of the work coming into contact with the liquid or other fluent material
    • 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
    • D21H5/00—Special paper or cardboard not otherwise provided for
    • D21H5/0005—Processes or apparatus specially adapted for applying liquids or other fluent materials to finished paper or board, e.g. impregnating, coating
    • D21H5/0042—Processes or apparatus specially adapted for applying liquids or other fluent materials to finished paper or board, e.g. impregnating, coating by pouring or allowing to flow in a continuous stream onto the surface, the entire stream being carried away by the paper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/04—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades

Definitions

  • the invention relates to a device for coating a continuously moving sheet or strip, such as for example a sheet of paper, cardboard, a film or a fabric, using a composition. liquid or in the form of foam.
  • coating is a treatment operation which consists in coating at least one of the faces of a continuously moving sheet with an appropriate layer, in order to modify its properties, in particular surface and / or its properties. mechanical.
  • coating paper although more generally reference is made to coating paper, the device according to the invention can also find applications for other uses, such as for example coating films or 'fabrics.
  • the regularity of the deposit is not always constant due to the friction of the sheet on an appreciable surface of the reservoir, which results in a defect in spreading of the coating layer, a defect known as "orange peel” (orange peel).
  • this device is limited to very fluid compositions, since it does not include any means for equalizing the deposited layer.
  • the "dosage” is the operation which consists in depositing a determined quantity of composition on a sheet
  • “equalization” is the operation which consists in uniformly distributing this quantity deposited in the leaf area.
  • the counter-roller is necessary to support the sheet which has been weakened by the penetration of the composition into the sheet and the metering wedge only measures the weight of the deposited layer without equalizing it, since the excess of this deposited composition is discharged to be recovered and recycled.
  • This device cannot be used with concentrated and viscous compositions (for example containing at least 60% solids), because because of the wide opening of the slit (of the order of ten centimeters and more), the concentration will increase in the vicinity of the metering corner, which risks causing defects, such as longitudinal scratches, irregular spreading, hence difficulties in controlling the quantity deposited. In addition, with backing papers having a poor look, the defects are accentuated by the backing roller.
  • This device is characterized in that the reservoir comprises immediately downstream of the rectilinear slot means capable of dosing and simultaneously equalizing the composition distributed by the slot.
  • the coating device characteristic of the invention, and for example in the case where a foam is applied, essentially consists of a supply tank (10) in which the coating composition is placed with a foaming agent. This composition is then brought to a foam generator (11), of a type known per se. Using a pipe (13), the foamed composition is brought to a stainless steel tube (14) forming a supply tank. statement of the composition.
  • This tube (14) limited at its two ends by size limiters (15) and (16) or the like, such as end drawers, is arranged transversely relative to the direction of advance F of a sheet of paper (17).
  • This reservoir (14) has an opening in the form of a rectilinear slot (18) disposed longitudinally relative to the reservoir and in the vicinity of the place where the moving sheet (17) is applied to this reservoir (14).
  • the foamed composition is pulsed by a pump, not shown, first in a box (12), then from there into the tank (14), more precisely in the supply chamber which will be detailed later. From there, it leaves regularly through the slot (18) to deposit on the moving sheet (17).
  • the coating device essentially consists of a spherical cap (20) made of a material having an excellent coefficient of friction with respect to the sheet to be coated (17), excellent wear resistance and does not deform under the effect of heat.
  • This cap (20) may for example be made of plastic, of the polyamide or polycarbonate type, or even of metal.
  • the latter In the area (21) where the sheet (17) comes into contact with this cap (20), the latter has grooves (22,23,24) relatively close to each other, not very wide and not very deep. It has been found that for example, for a tank of one hundred millimeters in diameter, three grooves spaced from each other by about fifteen millimeters, two millimeters wide and two millimeters deep gave satisfactory results.
  • Their length is greater than the width of the sheet to be processed and they can be connected together by other grooves (25) shown in FIG. 2. It is necessary that, as already said, the length of these grooves is greater than the width of the sheet to be treated, so that the boundary air layer formed on the moving sheet (17) is eliminated in contact with these grooves (22,23,24,25), then evacuated by the ends of these grooves.
  • the angle of attack 0 (which the sheet forms relative to the cap (20), is variable depending on the configuration of the machine. It is desirable that this angle is as open as possible, in order to have friction However, this angle must be compatible with the fact that the sheet of paper (17) must pass in contact with the grooves (22,23,24) intended to evacuate the boundary air layer. excellent results are obtained with an angle of between 15 and 30 °, preferably close to 20 °.
  • the cap (20) rests by means of fixing screws on a base (26), for example made of stainless steel, which is fixed to the frame by a nut (27) and a threaded rod (28).
  • the supply tube (13) opens onto the side wall of the tube (14). From there, the composition, in particular in the form of foam, enters a generally L-shaped supply chamber (30) whose walls gradually converge towards the slit, so as to bring the coating composition in a regular and homogeneous manner. slot.
  • the width of the slot (18), that is to say the distance between the inlet wall (31) and the bevelled blade (33) is most reduced. Excellent results are obtained with widths between five and twenty millimeters, preferably close to ten. In this way, during this journey, which lasts approximately 10 seconds, the sheet (17) has practically no time to impregnate, therefore to become brittle, which makes it possible, in combination with the angle ⁇ , to obtain a optimum dosing effect.
  • this cap (20) with the slot (18) and the blade (33) is interchangeable, which thus makes it possible to have assemblies with blades (33) of different inclination, than the it can conveniently be placed on the coating device by a quick attachment system.
  • the inclined leveling-metering blade (33) is applied by a movable wedge (34) to a blade-holder angle (35) secured to the part (36) downstream of the cap (20).
  • a screw (37) which turns, the corner (34) is made to slide thanks to the space provided at (38).
  • the exit angle ⁇ of the coated sheet (40) relative to the direction of the bevel (42) must be sufficiently open to ensure good tension of the sheet which presses it on the bevel. However, it should not be too open, in order to avoid contact of the coated layer on the body of the tube (14).
  • this angle should be between approximately 5 and approximately 50 °. If this angle A is too closed, the regularity of the deposition of the composition will no longer be controlled. On the other hand, if this angle is too open, the sheet (17) will be scraped, which will cause significant risks of breakage. In practice, this angle ⁇ may advantageously be close to 30 °.
  • the slot (18) is located just downstream of the axis of symmetry AB, so that when the coated sheet (40) leaves the device, there is no more contact between this device and sheet (40).
  • the walls of the chamber (30) are convergent so that the liquid composition or the pressure coating foam advances in a regular and homogeneous manner to the slot (18). .
  • this convergence must be progressive so as to avoid any stagnation in the composition.
  • the tube (14) comprises pressure sensors which are connected to a central member connected to the foam generator (11), so as to ensure a regular flow of the composition.
  • these sensors then immediately transmit information to the central control unit which then corrects the flow rate of the generator (11).
  • membrane sensors or piezo sensors are used for this.
  • the active surface of these sensors can be arranged on the vertical portion of the supply chamber (30).
  • a box (12) is placed on the conduit (13), possibly connected to a pressure sensor.
  • the periphery (50) of the tube (14) forms a stator. Inside the tube (14) is a cylinder (51) forming a rotor and driven in movement by a suitable motor, not shown.
  • the gap between the stator (50) and the rotor (51) forms a chamber (52) into which the treatment composition is supplied by suitable means. Advancing in this chamber (52), due to the rotation of the rotor (51), the composition is sheared and, in the case of pseudo-plastic or thirotropic compositions, its viscosity decreases.
  • the outer wall of the stator has longitudinal grooves (22, 23) intended to eliminate the layer of boundary air which forms upstream of the axis of symmetry AB and comprises downstream a straight longitudinal slot ( 18) associated with an inclined, bevelled blade (33), fixed by any means to the stator (50).
  • the excess of sheared composition is then evacuated by a channel (54) provided with a non-return blade (55) which prevents the sheared composition from returning to the feed point of the high viscosity composition.
  • the channel (54) is provided with a valve (56) which keeps the supply chamber (52) under pressure.
  • This device is particularly advantageous for coating by means of compositions with high viscosity.
  • the rotor (51) can be heated, to further promote the decrease in viscosity.
  • the arrival of the composition in the chamber (52) can be carried out by any suitable means, for example means of the manifold type.
  • compositions which can be used are liquid or are in the form of a foam. These compositions contain mineral and / or organic pigments in dispersion, mixed with binders, such as CMC, starch, latex and the most diverse additives. It is also possible according to the invention to coatings by means of hot-melts.
  • the slot (18) has a length of fifty centimeters and a width (distance: 31.33) of ten millimeters.
  • a fluid composition containing 10% by weight of starch in water (viscosity: 100m Pa. S), is deposited on a sheet of paper using a device according to Figure 3 about four grams per square meter in dry products.
  • a composition is deposited, this time no longer 10, but 20% by weight of starch. Thanks to the shearing effected in the chamber (52), a reduction in the viscosity is caused and a weight of layer comparable to that obtained in Example 1, while having less energy to provide for the subsequent drying of the coated sheet.
  • Example 1 is repeated, but this time no longer using a fluid composition, but a foam composition using the apparatus (11). A similar quantity of material is deposited and the surface properties of the paper are improved in a greater proportion. In addition, a substantial gain in drying energy is achieved.
  • the use of the device with a foamed composition has the advantage of consuming all that is provided by the slit and the air included in the bubbles is entrained by the sheet and / or through this sheet.
  • the pre-coating of a sheet of paper is carried out using a conventional composition based on latex and calcium carbonate at a concentration of 70% in dry matter.
  • the coating can be carried out at speeds of at least 800 m / min in order to deposit layer weights of 7 to 12 g / m 2 / face.
  • the paper thus treated has a very regular surface.
  • the coating of a paper with poor appearance is carried out in the same way as in Example 4, but by increasing the quantity deposited.
  • the composition spreads excellently.
  • the treated paper does not exhibit any defect in surface appearance. This is due in particular to the fact that the device according to the invention does not include a back-pressure roller.
  • the invention can be used advantageously for all coating treatments such as surfacing, pre-coating, coating, bonding, treatment with hot-melts.
  • the composition can be either liquid or in the form of a foam.
  • the invention can also be used in an aqueous medium or in a solvent medium, in particular for the treatment of tissues.

Landscapes

  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
  • Meat, Egg Or Seafood Products (AREA)
EP84420010A 1983-02-04 1984-01-26 Vorrichtung zur Beschichtung einer Folie oder eines Bandes in kontinuierlicher Bewegung Expired EP0117212B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84420010T ATE21053T1 (de) 1983-02-04 1984-01-26 Vorrichtung zur beschichtung einer folie oder eines bandes in kontinuierlicher bewegung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8301991 1983-02-04
FR8301991A FR2540406B1 (fr) 1983-02-04 1983-02-04 Dispositif d'enduction d'une feuille ou d'une bande en deplacement continu

Publications (2)

Publication Number Publication Date
EP0117212A1 true EP0117212A1 (de) 1984-08-29
EP0117212B1 EP0117212B1 (de) 1986-07-30

Family

ID=9285721

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84420010A Expired EP0117212B1 (de) 1983-02-04 1984-01-26 Vorrichtung zur Beschichtung einer Folie oder eines Bandes in kontinuierlicher Bewegung

Country Status (5)

Country Link
EP (1) EP0117212B1 (de)
AT (1) ATE21053T1 (de)
DE (1) DE3460364D1 (de)
FI (1) FI840452A (de)
FR (1) FR2540406B1 (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2158740A (en) * 1984-05-14 1985-11-20 John Rogers Coating applicator head
EP0196029A2 (de) * 1985-03-22 1986-10-01 Union Carbide Corporation In der Behandlung von biegsamem Bahnmaterial verwendete Vakuumführung
EP0196576A1 (de) * 1985-03-22 1986-10-08 Union Carbide Corporation Schaumapplikator für die Papierbehandlung
DE3723149A1 (de) * 1986-07-15 1988-01-21 Fuji Photo Film Co Ltd Vorrichtung zum auftragen einer fluessigkeit auf einen traeger
EP0369441A2 (de) * 1988-11-18 1990-05-23 Bematec Sa Beschichtungsvorrichtung für Materialbahnen
GB2227959A (en) * 1989-01-17 1990-08-15 Valmet Paper Machinery Inc Blade coating a material web
AT394668B (de) * 1984-11-17 1992-05-25 Voith Gmbh J M Einrichtung zum beschichten laufender warenbahnen mit einer streichmasse
WO2001060584A1 (en) * 2000-02-14 2001-08-23 The Procter & Gamble Company Extrusion die having dynamic flow inducer
WO2003040473A2 (en) * 2001-11-05 2003-05-15 Kimberly-Clark Worldwide, Inc. Foam treatment of tissue webs
US6730171B2 (en) 2001-11-05 2004-05-04 Kimberly-Clark Worldwide, Inc. Nozzle apparatus having a scraper for the application of the foam treatment of tissue webs
DE102022101266A1 (de) 2022-01-20 2023-07-20 Voith Patent Gmbh Verfahren und Auftragsvorrichtung zum Auftrag von aufgeschäumten, flüssigen und pastösen Auftragsmedien auf eine bewegende Auftragsfläche

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3446757C2 (de) * 1984-11-17 1995-05-24 Voith Gmbh J M Streicheinrichtung
DE3525805A1 (de) * 1985-07-19 1987-01-29 Hesselmann Planatolwerk H Vorrichtung zum auftragen eines klebstoffes in form einer queranleimung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2000001A1 (de) * 1968-07-31 1969-08-29 Eastman Kodak Co
DE1546903A1 (de) * 1961-10-26 1969-12-18 Eastman Kodak Co Schlitzgiesser
DE2055405A1 (de) * 1970-11-11 1972-05-25 Joseph Eck & Söhne; 4000 Düsseldorf Vorrichtung zum Auftragen von Beschichtungsmassen auf bahnenförmige Träger
FR2219992A1 (de) * 1973-03-02 1974-09-27 Svenska Cellulosa Ab
FR2375914A1 (fr) * 1977-01-03 1978-07-28 Inventing Ab Procede et appareil pour traiter ou appliquer des revetements sur des surfaces, par exemple, de feuilles continues de matiere en mouvement

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1546903A1 (de) * 1961-10-26 1969-12-18 Eastman Kodak Co Schlitzgiesser
FR2000001A1 (de) * 1968-07-31 1969-08-29 Eastman Kodak Co
DE2055405A1 (de) * 1970-11-11 1972-05-25 Joseph Eck & Söhne; 4000 Düsseldorf Vorrichtung zum Auftragen von Beschichtungsmassen auf bahnenförmige Träger
FR2219992A1 (de) * 1973-03-02 1974-09-27 Svenska Cellulosa Ab
FR2375914A1 (fr) * 1977-01-03 1978-07-28 Inventing Ab Procede et appareil pour traiter ou appliquer des revetements sur des surfaces, par exemple, de feuilles continues de matiere en mouvement

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2158740A (en) * 1984-05-14 1985-11-20 John Rogers Coating applicator head
AT394668B (de) * 1984-11-17 1992-05-25 Voith Gmbh J M Einrichtung zum beschichten laufender warenbahnen mit einer streichmasse
EP0196029A2 (de) * 1985-03-22 1986-10-01 Union Carbide Corporation In der Behandlung von biegsamem Bahnmaterial verwendete Vakuumführung
EP0196576A1 (de) * 1985-03-22 1986-10-08 Union Carbide Corporation Schaumapplikator für die Papierbehandlung
EP0196029A3 (de) * 1985-03-22 1987-04-15 Union Carbide Corporation In der Behandlung von biegsamem Bahnmaterial verwendete Vakuumführung
DE3723149A1 (de) * 1986-07-15 1988-01-21 Fuji Photo Film Co Ltd Vorrichtung zum auftragen einer fluessigkeit auf einen traeger
DE3723149C2 (de) * 1986-07-15 1999-12-09 Fuji Photo Film Co Ltd Vorrichtung zum Auftragen einer Beschichtungsmasse auf einen Träger
EP0369441A3 (de) * 1988-11-18 1991-01-23 Bematec Sa Beschichtungsvorrichtung für Materialbahnen
EP0369441A2 (de) * 1988-11-18 1990-05-23 Bematec Sa Beschichtungsvorrichtung für Materialbahnen
GB2227959A (en) * 1989-01-17 1990-08-15 Valmet Paper Machinery Inc Blade coating a material web
GB2227959B (en) * 1989-01-17 1992-10-14 Valmet Paper Machinery Inc Inverted blade metering unit and method for blade-coating a material web
AU635914B2 (en) * 1989-01-17 1993-04-08 Valmet Paper Machinery Inc. Inverted blade metering unit and method for blade-coating a material web
WO2001060584A1 (en) * 2000-02-14 2001-08-23 The Procter & Gamble Company Extrusion die having dynamic flow inducer
US6406752B1 (en) 2000-02-14 2002-06-18 The Procter & Gamble Company Extrusion die having dynamic flow inducer
WO2003040473A2 (en) * 2001-11-05 2003-05-15 Kimberly-Clark Worldwide, Inc. Foam treatment of tissue webs
WO2003040473A3 (en) * 2001-11-05 2003-10-30 Kimberly Clark Co Foam treatment of tissue webs
US6730171B2 (en) 2001-11-05 2004-05-04 Kimberly-Clark Worldwide, Inc. Nozzle apparatus having a scraper for the application of the foam treatment of tissue webs
DE102022101266A1 (de) 2022-01-20 2023-07-20 Voith Patent Gmbh Verfahren und Auftragsvorrichtung zum Auftrag von aufgeschäumten, flüssigen und pastösen Auftragsmedien auf eine bewegende Auftragsfläche

Also Published As

Publication number Publication date
EP0117212B1 (de) 1986-07-30
FI840452A0 (fi) 1984-02-03
FR2540406A1 (fr) 1984-08-10
ATE21053T1 (de) 1986-08-15
FI840452A (fi) 1984-08-05
FR2540406B1 (fr) 1986-10-31
DE3460364D1 (en) 1986-09-04

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