EP0454382B1 - Procédé et appareil de revêtement de matériaux en feuilles - Google Patents

Procédé et appareil de revêtement de matériaux en feuilles Download PDF

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Publication number
EP0454382B1
EP0454382B1 EP91303546A EP91303546A EP0454382B1 EP 0454382 B1 EP0454382 B1 EP 0454382B1 EP 91303546 A EP91303546 A EP 91303546A EP 91303546 A EP91303546 A EP 91303546A EP 0454382 B1 EP0454382 B1 EP 0454382B1
Authority
EP
European Patent Office
Prior art keywords
coating
roll
sheet material
applicator roll
speed
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
EP91303546A
Other languages
German (de)
English (en)
Other versions
EP0454382A3 (en
EP0454382A2 (fr
Inventor
Archibald Hill Mackie
Terence John Simons
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.)
Wiggins Teape Group Ltd
Original Assignee
Wiggins Teape Group 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 Wiggins Teape Group Ltd filed Critical Wiggins Teape Group Ltd
Publication of EP0454382A2 publication Critical patent/EP0454382A2/fr
Publication of EP0454382A3 publication Critical patent/EP0454382A3/en
Application granted granted Critical
Publication of EP0454382B1 publication Critical patent/EP0454382B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0826—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
    • B05C1/083—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets being passed between the coating roller and one or more backing rollers
    • 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
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0821—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line characterised by driving means for rollers or work
    • 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/50—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by form
    • D21H21/52—Additives of definite length or shape
    • D21H21/54—Additives of definite length or shape being spherical, e.g. microcapsules, beads

Definitions

  • This invention relates to apparatus for coating sheet materials with fluid coating, and more particularly to roll coating equipment for that purpose.
  • SU-A-712 139 shows apparatus for coating sheet materials with fluid coating (glue).
  • the applicator roll defines the thickness of the coated layer and thus acts as a metering roll which merely revolves in a glue container and picks up the glue. The thickness of the layer applied to the web is then applied by the gap between the rolls and any excess glue merely spills away and will tend to increase the thickness of the layer of material picked up from the glue container by the applicator roll.
  • there is no proper metering of the layer of glue and because of the very nature of the material it will tend to build up on the applicator roller and the thickness of the layer applied to the web will be inconsistent.
  • the applicator roll appears to rotate at the same speed of movement as the sheet material and there is therefore no metering.
  • One form of roll coating apparatus currently in use comprises an applicator roll on which a film or a fluid coating mix is formed and metered. Sheet material to be coated with the coating mix is drawn around the roll under tension so that the coating mix is transferred from the roll to the sheet material. Apparatus of this kind is described in GB-A-1 151 690.
  • the invention therefore provides a process for coating sheet material at high speed with a low viscosity, low coat weight coating, and comprises the steps of forming, on a rotatable applicator roll, a metered predetermined thickness of a fluid film of coating mix to be applied to the sheet material at a coating station and driving said applicator roll at a surface speed less than the speed of movement of the sheet material so that the coating mix is metered as it is applied to said sheet material characterised by simultaneously passing the sheet material to be coated around an endless guide surface at said coating station whilst maintaining the spacing (A) between the applicator roll and the guide surface at a spacing equivalent to the combined thickness (B) of the sheet material and the metered film (C) of coating mix on the applicator roll.
  • apparatus for coating sheet material at high speed with a low viscosity low coat weight coating comprises a rotatable applicator roll, means for forming a film of coating mix on said applicator roll, means for forming a metered predetermined thickness (B) of a fluid film coating mix on said applicator roll and means for driving said applicator roll at a surface speed less than the speed of movement of the sheet material, characterised by means defining an endless guide surface for guiding sheet material past and in the same direction of movement as said applicator roll, means for maintaining the spacing between the applicator roll and the guide surface substantially equivalent to the combined thickness (B) of the sheet material and the metered film (C) of coating mix on said applicator roll.
  • the spacing between the applicator roll and the surface of the sheet material can be 3 - 4 thousandths of an inch (75 - 100 ⁇ m) and the spacing between the applicator roll and the guide surface for use with a 50 gram sheet which has a caliper (i.e. thickness) of 75 - 100 ⁇ m would be 150 - 200 ⁇ m.
  • the applicator roll may form part of a three roll coating system in which the other components comprise a pick up roll which transfers coating from a reservoir in the applicator roll, and a metering roll.
  • a pick up roll which transfers coating from a reservoir in the applicator roll
  • a metering roll Such a system is described in GB-A-1 151 690.
  • the guide surface may comprise a rotatable hold down or presenter roll which is driven at substantially the same surface speed as the speed of the sheet material.
  • the roll surface can be provided with a surface covering having a hardness, typically of about 35° Shore, which prevents damage to the microcapsules whilst ensuring that the back coating is properly applied.
  • the applicator roll may be driven so as to rotate at a surface speed less than the line speed of the sheet material so that the coating is effectively "metered” onto the sheet for the achievement of low coatweights.
  • this shows a known coating apparatus comprising an applicator roll 1, a pick up roll 2 running in a pan 3 of coating mix, and a metering roll 4 running in a pan 5 which receives surplus mix metered from the roll 1.
  • Sheet material 6, for example paper, is drawn past and in contact with the roll 1 with some degree of wrap around the roll being generated by the positioning of two guide rolls 7, one upstream and one downstream of the roll 1.
  • the apparatus operates in "forward" mode.
  • the applicator roll 1 rotates in the same direction as the movement of the sheet.
  • the pick up roll 2 may rotate in either direction, but the metering roll 4 will rotate in the same sense as the applicator roll 1.
  • Figure 2 shows a three roll coater system generally of the kind described above with reference to Figure 1, the same parts being identified by the same reference numerals.
  • the paper sheet 6 is drawn around a hold down or presenter roll 10 driven at a surface speed substantially the same as that of the sheet 6.
  • the roll 10 does not however form a nip with the applicator roll 1 but is controllably spaced there from as described in greater detail below with reference to Figure 3.
  • the configuration of Figure 2 is suitable for high speed coating operations of more than about 750 metres per minute in which the sheet 6 could be degraded by downward pressure as shown in Figure 1.
  • the applicator roll is arranged to run with a surface speed of approximately 1/6 of the line speed of the sheet 6 so that the coating mix is effectively "metered” onto the sheet for the achievement of low coatweights.
  • the coating mix is of low viscosity, and has a typical coat weight of about 16 - 30 grams per square metre wet, which equates to 4 - 5 grams per square metre when dried on the sheet which has been coated.
  • the mix has to be about 96 grams per square metre which equals about 100 ⁇ m on the applicator roll.
  • the apparatus 20 comprises a frame 21 formed from two side members 22 carried on a base 23 and spaced by struts 24. As best seen in Figure 5, each of the side members 22 comprises two vertical members 25 spaced by an upper strut 26 and an intermediate strut 27.
  • a shaft 28 of an applicator roll 29 is journalled for rotation at its ends in bearings 30 forming part of the struts 27.
  • a pick up roll 31 is mounted for rotation in a pan of coating mix so as to transfer a film of the mix to the applicator roll 29 during co-operative rotation of the two rolls.
  • a metering roll 33 is also mounted for rotation in a drain pan 34 so as to meter a film of coating mix previously applied by the roll 31 during co-operative rotation of the rolls 29 and 33.
  • the roll coating system shown in Figure 5 is of well known kind as described above and in GB-A-1 151 690.
  • a hold down or presentation roll 37 is mounted immediately above the applicator roll 29 on a shaft 38 journalled for rotation in bearing blocks 39.
  • the bearing blocks 39 carry sliders 40 (as best seen in Figure 5) mounted for vertical movement on a slideways 41 formed on the inner faces of the vertical members 25.
  • Each of the bearing blocks 39 carries a dependent threaded pin 44 on which a capped nut 45 is engaged at the lower end.
  • the cap 46 of the nut 45 can be brought into engagement with the anvil 47 of a height adjustment mechanism 48 by rotation of the nut 45.
  • a corresponding cumulative vertical incremental movement of the anvil 47 is thus produced by the action of the double wedge 49 as it is driven horizontally between the rollers 51 and 52.
  • very small incremental movements of the anvil 47 can be effected, typically of the order of 50 microns.
  • the piston cylinder units 43 and the nuts 45 are adjusted so as to bring the surface of the hold down roll 37 just into contact with the applicator roll 29, that is at a "zero" setting.
  • the pneumatic cylinders 55 of the actuator units 48 are then selectively pressurised to raise the anvils 47 against the pneumatic load being applied by the piston and cylinder units 43 by an amount equivalent to the combined thickness of the paper 57 to be coated and the coating to be applied thereto as a film from the applicator roll 29. It will thus be appreciated that the coating is applied without the application of nip pressure.

Landscapes

  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Paper (AREA)

Claims (8)

  1. Procédé de revêtement de matériau en feuille (6) à grande vitesse, avec un produit de revêtement (11) de faible viscosité et de faible poids de revêtement, comprenant les étapes consistant à former sur un rouleau applicateur rotatif (1), une épaisseur dosée prédéterminée d'une pellicule fluide de mélange de revêtement sur le matériau en feuille (6) à un poste de revêtement, et à entraîner ledit rouleau applicateur (1) à une vitesse circonférentielle inférieure à la vitesse linéaire du mouvement du matériau en feuilles (6), de telle sorte que le mélange de revêtement soit dosé lorsqu'il est appliqué audit matériau en feuille, caractérisé par le passage simultané du matériau en feuille (6) à revêtir autour d'une surface de guidage sans fin (10) audit poste de revêtement, tout en maintenant l'espacement (A) entre le rouleau applicateur (1) et la surface de guidage (10) à un espacement équivalent à l'épaisseur combinée (B) du matériau en feuille (6) et de la pellicule dosée (C) du mélange de revêtement sur le rouleau applicateur (1).
  2. Procédé selon la revendication 1, caractérisé en ce qu'il est prévu une surface de guidage formée par un rouleau d'appui vers le bas ou rouleau de présentation (10), entraîné sensiblement à la même vitesse circonférentielle que la vitesse linéaire du mouvement du matériau en feuille.
  3. Procédé selon la revendiation 2, caractérisé en ce que le revêtement (11) est appliqué comme revêtement de dessous à une feuille de matériau (6) qui a été antérieurement recouverte sur sa surface supérieure avec des micro-capsules.
  4. Appareil pour le revêtement de matériau en feuille (6) à grande vitesse, avec un produit de revêtement (11) de faible viscosité et de faible poids de revêtement, comprenant un rouleau applicateur rotatif (1), un moyen pour former une épaisseur dosée prédéterminée (B) d'un mélange de revêtement de pellicule fluide sur ledit rouleau applicateur (1), et un moyen pour entraîner ledit rouleau applicateur (1) à une vitesse circonférentielle inférieure à la vitesse linéaire du mouvement du matériau en feuille (6), caractérisé par un moyen (10) définissant une surface de guidage sans fin pour guider le matériau en feuille (6) au-delà et dans la même direction de mouvement que ledit rouleau applicateur (1), un moyen (48) pour maintenir l'espacement entre le rouleau applicateur (1) et la surface de guidage (10) équivalent à l'épaisseur combinée (B) du matériau en feuilles (6) et de la pellicule dosée (C) du mélange de revêtement sur ledit rouleau applicateur (1).
  5. Appareil selon la revendication 4, caractérisé en ce que le rouleau applicateur (1) constitue une partie d'un système de trois rouleaux de revêtement, qui comporte un rouleau d'alimentation (2) qui transfère le mélange de revêtement à partir d'un réservoir (3), et un rouleau de dosage (4).
  6. Appareil selon la revendication 4 ou la revendication 5, caractérisé en ce que la surface de guidage comporte un rouleau d'appui vers le bas ou rouleau de présentation (10).
  7. Appareil selon la revendication 6, caractérisé par un moyen pour entraîner le rouleau d'appui vers le bas ou rouleau de présentation (10) sensiblement à la même vitesse circonférentielle que la vitesse linéaire du mouvement du matériau en feuille (6).
  8. Appareil selon la revendication 6 ou la revendication 7, caractérisé en ce que le rouleau d'appui vers le bas ou rouleau de présentation (10) est pourvu d'une couverture de surface ayant une dureté approximativement de 35° Shore.
EP91303546A 1990-04-23 1991-04-19 Procédé et appareil de revêtement de matériaux en feuilles Expired - Lifetime EP0454382B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB909009105A GB9009105D0 (en) 1990-04-23 1990-04-23 Improvements in apparatus for coating sheet material
GB9009105 1990-04-23

Publications (3)

Publication Number Publication Date
EP0454382A2 EP0454382A2 (fr) 1991-10-30
EP0454382A3 EP0454382A3 (en) 1992-01-15
EP0454382B1 true EP0454382B1 (fr) 1994-12-07

Family

ID=10674862

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91303546A Expired - Lifetime EP0454382B1 (fr) 1990-04-23 1991-04-19 Procédé et appareil de revêtement de matériaux en feuilles

Country Status (7)

Country Link
EP (1) EP0454382B1 (fr)
JP (1) JPH04227884A (fr)
CA (1) CA2041035A1 (fr)
DE (1) DE69105604T2 (fr)
ES (1) ES2066353T3 (fr)
FI (1) FI106538B (fr)
GB (1) GB9009105D0 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07509669A (ja) * 1992-07-27 1995-10-26 フォイト　ズルツァー　パピーアテヒニク　パテント　ゲゼルシャフト　ミット　ベシュレンクテル　ハフツング 感圧記録紙用のｃｆ−またはｃｂ層を備えたウェブの製造方法
GB2325422B (en) * 1997-05-20 2001-09-05 Ykk Europ Ltd Apparatus and method for intermittently coating a tape
ITUB20155948A1 (it) * 2015-11-26 2017-05-26 Biko Mecc S R L Macchina incollatrice per impianti di produzione di materiali abrasivi
CN114392886B (zh) * 2022-01-12 2023-08-11 湖州金洁包装有限公司 一种铝箔表面涂覆装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1151690A (en) * 1967-08-18 1969-05-14 Appleton Coated Paper Company Method of and Apparatus for Coating Travelling Webs
SU712139A1 (ru) * 1978-07-24 1980-01-30 Ленинградское Абразивное Производственное Объединение Устройство дл нанесени кле
AU539577B2 (en) * 1980-04-08 1984-10-04 Wiggins Teape Group Limited, The Applying a coating to a web of sheet material

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SOVIET INVENTIONS ILLUSTRATED week c37, 22 october 1980noh9799 derwent publications ltd,london gb &SU-A-712139(LENGD ABRASIVE) 24 JULY 1978 *

Also Published As

Publication number Publication date
FI106538B (fi) 2001-02-28
DE69105604D1 (de) 1995-01-19
ES2066353T3 (es) 1995-03-01
EP0454382A3 (en) 1992-01-15
CA2041035A1 (fr) 1991-10-24
FI911909A (fi) 1991-10-24
GB9009105D0 (en) 1990-06-20
DE69105604T2 (de) 1995-04-13
FI911909A0 (fi) 1991-04-19
JPH04227884A (ja) 1992-08-17
EP0454382A2 (fr) 1991-10-30

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