WO1998047630A1 - Verfahren und vorrichtung zum auftragen von dispersionen auf eine materialbahn - Google Patents
Verfahren und vorrichtung zum auftragen von dispersionen auf eine materialbahn Download PDFInfo
- Publication number
- WO1998047630A1 WO1998047630A1 PCT/EP1998/002307 EP9802307W WO9847630A1 WO 1998047630 A1 WO1998047630 A1 WO 1998047630A1 EP 9802307 W EP9802307 W EP 9802307W WO 9847630 A1 WO9847630 A1 WO 9847630A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- web
- dispersion
- nozzle
- slot nozzle
- barrier layer
- Prior art date
Links
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
- D21H23/48—Curtain coaters
-
- 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
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/005—Curtain coaters
-
- 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
- B05D1/30—Processes for applying liquids or other fluent materials performed by gravity only, i.e. flow coating
- B05D1/305—Curtain coating
Definitions
- the invention relates to a method and a device for applying dispersions to a running web of material, in particular dispersion PSAs on a web-shaped release material for the production of self-adhesive
- Labels adhesive film strips for informational, labeling or decorative purposes, or a barrier layer on a web-shaped base material for the production of a moisture-impermeable packaging material.
- a moisture and vapor impermeable barrier layer For the production of moisture-impermeable packaging materials, it is known to apply a moisture and vapor impermeable barrier layer to a web-shaped base material.
- a paper or cardboard web or a plastic film made of PVC (polyvinyl chloride), PE (polyethylene), PP (polypropylene), OPP (oriented polypropylene) etc. is used as the base material.
- a dispersion containing PVDC polyvinylidene chloride
- the barrier layer is applied to a plastic film as the base material, it is necessary to apply an adhesion promoter to the base material beforehand.
- application rollers are used to apply the dispersion pressure-sensitive adhesives or the barrier layer to the web material, but they are only able to apply the desired application quantities with the required uniform coating at web speeds of up to approx. 500 m / min.
- the invention is therefore based on the object of providing a method and a device for applying dispersions to a running web of material which have a very uniform coating in an amount of up to 100 g / m 2 at a web speed of more than 500 m / min allows.
- the slot nozzle is designed to be height-adjustable.
- a wet application of the dispersion between 5 g / m 2 and 100 g / m 2 can be applied particularly evenly in a method according to the invention with a device according to the invention.
- a range between 20 g / m and 50 g / m 2 has proven particularly advantageous.
- a narrower curtain creates a coating-free edge and thus reduces the risk of water penetrating into the edges and these curling in a subsequent dryer or coating compound getting onto the back and contaminating subsequent machine parts.
- a coating-free edge is necessary for procedural reasons.
- the method according to claim 6 and the system provided for this purpose make it possible to produce adhesive slide material in a continuous process with a very uniform adhesive layer at very high production speeds of more than 500 m / min.
- a scraper is arranged behind the slot nozzle behind the slot nozzle and can be moved and extends transversely across the working width.
- the scraper is preferably connected to a suction device in order to suction the scraped-off amount of dispersion.
- Claims 20 and 21 contain configurations of a device according to the invention with guide elements which prevent the free-falling curtain from being constricted at the edges.
- the supply of an auxiliary liquid prevents excessive friction between the curtain and a guide element arranged at the edge, which would result in a different flow speed of the curtain at the edges, which could lead to the curtain tearing off (claim 21).
- a separating element according to claim 22 makes it easy to set different coating widths.
- Figure 1 shows the side view of an application device according to the invention.
- Figure 2 shows a section transverse to the web running direction through a nozzle with guide elements for the curtain edges.
- FIG. 3 schematically shows a system for producing pressure sensitive adhesive material using an application device according to the invention.
- FIG. 4 shows schematically a plant for the production of a moisture-impermeable packaging material.
- FIG. 5 shows the system diagram for venting the dispersion.
- the device shown in FIG. 1 is used to apply a dispersion PSA (for example an acrylate) in aqueous solution to a siliconized paper web 1.
- a dispersion PSA for example an acrylate
- the device according to the invention can also be used to apply other dispersions (eg acrylic lacquers) to paper, plastic films or thin metal strips.
- a deflection roller 2 is mounted at a certain height, from which the web 1 fed from below is deflected into a horizontal (as in the exemplary embodiment) or an inclined course against the horizontal.
- a slot nozzle 3 extending transversely to the web running direction is suspended in the frame. Below the slot nozzle 3, the web 1 is guided across its entire width on its underside by a support element which ensures a precisely defined web run during application.
- the deflection roller 2 also serves as a support element.
- the slot nozzle 3 is connected to a supply for dispersion, not shown, and has on its underside a slot-shaped opening from which the dispersion emerges and forms a free-falling curtain that falls as far as the web surface.
- the width of the slot of the nozzle 3 is preferably less than the width of the web 1, so that free web edges remain after the application of dispersion.
- the slot nozzle 3 is adjustable in height between two vertical profiles 4 suspended around the Distance of the outlet slot from the web 1 and thus to be able to adjust the drop height of the dispersion.
- the stand 4 with the slot nozzle 3 are mounted horizontally in and against the web running direction in two lateral rails 5 which extend against the web running direction (to the left in FIG. 1) into an area in front of the deflection roller 2.
- the slot nozzle 3 can thus be moved into the area in front of the apex line of the deflection roller 2. Your exit slot is then above a collecting trough 6, which is arranged directly in front of the deflection roller 2.
- Additional support elements of which the horizontally extending one, preferably follow at a distance of less than 1 m from the slot nozzle 3 in the web running direction
- Lane 1 is supported on its underside.
- three rolls 7, 8, 9 forming a roll web support web 1.
- fixed elements are preferably used both below the slot nozzle 3 and behind it, from which the dispersion is not thrown off in the event of a web break. This prevents contamination of the system in the event of a web break.
- the fixed support elements - as shown in Figure 4 - consist of a fixed hollow body 37, the wall 38 facing the web 1 is made of an air-permeable material.
- the hollow body 37 is on one
- a porous thermoset aluminum composite material with a pore size of less than 500 ⁇ m has been shown to be a particularly suitable material for producing the porous wall 38.
- the pore size is preferably between 10 ⁇ m and 100 ⁇ m.
- the boundary wall 38 is preferably designed such that a more or less convexly curved guide surface is formed, the axis of curvature extending transversely to the web running direction.
- the support roller 2 is also preferred as Fixed cylinder is formed, the outer surface of which is built up in the area wrapped by the web 1 from cylindrical shell-shaped segments which are made of the porous material. The web 1 can thus be guided very calmly at all positions where it is acted on.
- a suction nozzle 10 which can be positioned transversely over the edge region and in height, is mounted on the inside of each rail 5 and is connected to a suction line for suctioning off dispersion. So that the vertical distance to the web 1 can be set exactly, the suction nozzle 10 is located exactly above the support roller 8, as shown in FIG. 3.
- the web 1 is guided to a further support roller 1 1, which serves as a counter roller for a scraper 1 2 movable against the top of the web 1 and away from it.
- the scraper 1 2 extends across the width of the web. It is attached to a pivotally mounted holder 1 3 which extends over the working width.
- the holder 1 3 is mounted on each longitudinal side of the device in a support 14 attached to the frame of the device.
- a suction device is arranged in front of it in the web running direction.
- the suction device is preferably also suspended from the supports 14 and contains a rear storage wall 15 which forms with the scraper 12 a suction chamber which is open towards the web 1 and from which the excess dispersion is suctioned off.
- guide elements 41 are arranged at both ends of the slot 40 of the slot nozzle 3 and extend downward into the vicinity of the web 1 and counteract a constriction of the edges.
- a preferred embodiment of a nozzle 3 with guide elements 41 is shown in FIG. 2: On each of the two sides of the slot nozzle 3, a guide element 41 is fastened directly next to the outlet gap 40, which is flat on its inside 42 facing the curtain 39.
- the inner surface 42 extends from the nozzle 3 to the web 1 at an angle between 0 ° and 10 ° to the center of the curtain 39.
- each guide element 41 which forms the end of the inner surface 42, is preferably designed as a tear-off edge 47 so that the edge of the curtain 39 leaves the guide element 41 in a defined flow without undesired deflection to the outside.
- each guide element 41 has a through hole which serves as a feed line 43 for supplying an auxiliary liquid to the inner surface 42.
- a liquid which reduces the surface tension for example water, water with a wetting agent or a dispersion diluted with water, is used as the auxiliary liquid.
- the inside of the feed line 43 opens into the upper part of a feed channel 44 of approximately 20 mm in length, which runs vertically downward above the exit gap 40 and whose outlet opening is at the level of the exit gap 40 of the nozzle
- the feed channel 44 is constructed in a structurally simple manner such that a vertical left-hand groove extending up to the bore 43 is worked into the inner surface 42 of the guide element 41 in the region of the slot nozzle 3 and is sealed by the guide element 41 on the side wall of the nozzle 3 when the guide element 41 is fastened.
- auxiliary liquid supplied to the guide element 41 above and flowing down on the inner surface 42 has a substantially vertically downward flow when it comes into contact with the edge of the curtain 39 - in the example when it leaves the feed channel 44 at the level of the outlet gap 40 , whose
- Speed is at least as great as the exit speed of the dispersion from the nozzle 3. This ensures that there is no delay in the curtain edges on the guide elements 41 which affects the stability of the curtain 39 compared to the falling speed of the curtain 39 in the central region.
- the inner surfaces 42 are designed so that they can be easily wetted by the auxiliary liquid. Thus, transverse forces act on the curtain 39 at its edges without its stability being influenced by decelerating the falling speed or by transverse currents at the edges.
- a separating element 45 is arranged between the underside of the guide element 41 and the web 1, which extends from the outside inwards into the area of the web 1.
- Each separating element 45 is slidably mounted transversely to the web running direction so that different coating widths can be set.
- the transverse adjustment of each separating element 45 is preferably carried out automatically by means of an actuating motor in such a way that each separating element 45 can be adjusted at least 500 mm in order to be able to set widely differing coating widths.
- Each separating element 45 has an upper collecting surface 46, which preferably extends inclined outwards, so that the impinging dispersion runs outwards.
- the collecting surface 46 Towards the inside, ie towards the center of the curtain, the collecting surface 46 curves upward in a sharp separating edge 48 which cuts the curtain 39 at the desired point in the manner of a blade.
- FIG. 3 shows the system diagram for a continuous production of pressure sensitive adhesive material
- a paper web 1 is drawn off as a separating material from a winding roll 1 7 suspended in a roll-off device 1 6 and is first fed to an application unit 18 for silicone.
- the application unit 1 8 is a known one
- roller applicator at this point a slot nozzle can also be used, from which the silicone is applied to web 1 in a free-falling curtain.
- a dryer 19 for crosslinking the silicone alternatively a device for irradiation with UV radiation can also be used.
- a device for irradiation with UV radiation can also be used.
- a device for irradiation with UV radiation can also be used.
- the web is fed to a further dryer 20, with which the adhesive is dried.
- a laminating station 21 in which the web 1 on its side provided with pressure sensitive adhesive with a cover material or Cover film 22 is laminated.
- the cover material or the cover film 22 is continuously drawn off from a winding roll 24 suspended in a roll-off device 23.
- the laminated web 25 is then wound up in a winding device 26 to form a winding roll 27.
- FIG. 4 shows the diagram of a plant for the continuous production of liquid-tight packaging material.
- the nozzle 3 with its auxiliary units 10, 1 2 is arranged below the dryer 19, 20 as close as possible to the floor.
- the arrangement of the nozzle 3 with the auxiliary units 10, 1 2 in the corridor area has the advantage, on the one hand, that easier maintenance (cleaning,
- the nozzle 3 with its auxiliary units 10, 1 2 can also be arranged below the dryer 1 9, 20 in the system according to FIG. 3.
- a web-shaped base material made of paper, cardboard or a plastic (PVC, PE, PP, OPP etc.) is drawn off from a winding roll 17 suspended in the unwinding device 1 6 and first fed to the applicator unit 1 8. There an adhesion promoter (primer) is applied, which is then dried in the dryer 19.
- an adhesion promoter (primer) is applied, which is then dried in the dryer 19.
- Adhesion promoter required. Base materials for packaging materials that do not require the application of an adhesion promoter are also used. Then the applicator 1 8 and the dryer 1 9 are unnecessary.
- the web is deflected downward and guided to a device which applies a liquid and vapor tight barrier layer.
- the device contains a slot nozzle 3 as an application element, from which the barrier material falls down onto the web 1 in a free curtain.
- a dispersion containing PVDC polyvinylidene chloride
- the material for the barrier layer can additionally contain pigments.
- the preferably used fixed support elements are shown, on which the web 1 slides on an air cushion during the order.
- the barrier layer is then dried in the dryer 20. Finally, the web 1 is wound up in the winding device 26 to form a winding roll 27.
- the slot nozzle 3 is first adjusted in its vertical position so that the height of the curtain emerging from it is between 20 mm and 500 mm.
- the slot nozzle 3 is moved into a position in front of the apex line of the deflection roller 2 (to the left in FIG. 1), so that its outlet slot is located above the tub 6.
- dispersion is fed from the reservoir 8 into the slot nozzle 3.
- a curtain is formed which falls into the tub 6.
- the material web 1 is pulled off the winding roll 17 and passed through the applicator unit 1 8, where, depending on the application, first a repellent material, in the example silicone, or an adhesion promoter is applied.
- a repellent material in the example silicone, or an adhesion promoter
- the slit nozzle 3 is moved in the web direction into its working position above the deflection roller 2.
- the dispersion curtain emerging from the nozzle 3 hits the material web 1.
- the suction nozzles 10 for the edge suction on each side are positioned and switched on in order to suction off the additional job at the web edges.
- the scraper 1 2 In its working position, the scraper 1 2 is pivoted downwards at the top of the web 1 and scrapes off the bead of dispersion formed at the start of the job.
- the scraper 1 2 When the dispersion in the impact zone is stretched from the running web 1 to the desired layer thickness, the scraper 1 2 is pivoted upward into a rest position.
- the dispersion feed to the nozzle 3 is adjusted so that an amount of 5 g / m 2 - 100 g / m 2 , preferably 20 g / m 2 - 50 g / m 2 , is applied to the web 1 as a wet application.
- the applied dispersion is then dried in the dryer 20.
- the web 1 is fed to the laminating station 21 after the dryer 20. There, the side provided with dispersion pressure-sensitive adhesive is laminated with a cover film 22 removed from the material web 24. The laminated web 25 is then wound up into a winding roll 27 in the winding device 26.
- the web 1 provided with a barrier layer is fed to the reel-up device 26 directly after drying in the dryer 20 and is wound up there to form a winding roll 27.
- FIG. 5 schematically shows the device for deaerating the dispersion before it is fed into the nozzle 3:
- the dispersion is fed to the nozzle 3 from a storage container 28, the amount supplied to the nozzle 3 being controlled by a metering pump 29. If necessary, the dispersion is filtered on its way to the nozzle 3 by means of a filter 30. To remove air bubbles from the dispersion, the storage container 28 is connected to a self-contained ventilation circuit which is independent of the feed line to the slot nozzle 3. This makes it possible to control the feed quantity into the shooting nozzle 3, on which the discharge quantity of the nozzle 3 and thus the application quantity on the web 1, by means of the metering pump 29 unaffected by the ventilation.
- a portion of the dispersion is permanently drawn off from the storage container 28 by means of a pump 31 and fed to a ventilation container 32.
- the ventilation container 32 is connected via a line 33 to a vacuum pump.
- a prefilter 35 is arranged in the return line 34 from the ventilation device into the storage container 28.
- New dispersion is fed into the storage container 28 by means of a feed line 36.
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- Application Of Or Painting With Fluid Materials (AREA)
- Coating Apparatus (AREA)
- Paper (AREA)
- Wrappers (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Adhesive Tapes (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98924149A EP0977636B1 (de) | 1997-04-21 | 1998-04-20 | Verfahren und vorrichtung zum auftragen von dispersionen auf eine materialbahn |
AT98924149T ATE231747T1 (de) | 1997-04-21 | 1998-04-20 | Verfahren und vorrichtung zum auftragen von dispersionen auf eine materialbahn |
JP10545006A JP2000510389A (ja) | 1997-04-21 | 1998-04-20 | 材料ウェブに分散液を塗布するための方法及び装置 |
DE59807071T DE59807071D1 (de) | 1997-04-21 | 1998-04-20 | Verfahren und vorrichtung zum auftragen von dispersionen auf eine materialbahn |
DK98924149T DK0977636T3 (da) | 1997-04-21 | 1998-04-20 | Fremgangsmåde og anlæg til fremstilling af kontaktklæbemateriale eller af emballeringsmateriale, der er uigennemtrængeligt for fugt |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19716466.8 | 1997-04-21 | ||
DE19716466A DE19716466A1 (de) | 1997-04-21 | 1997-04-21 | Verfahren und Vorrichtung zum Auftragen von Dispersionen auf eine Materialbahn |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998047630A1 true WO1998047630A1 (de) | 1998-10-29 |
Family
ID=7827056
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1998/002307 WO1998047630A1 (de) | 1997-04-21 | 1998-04-20 | Verfahren und vorrichtung zum auftragen von dispersionen auf eine materialbahn |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0977636B1 (de) |
JP (1) | JP2000510389A (de) |
CN (1) | CN1140357C (de) |
AT (1) | ATE231747T1 (de) |
DE (2) | DE19716466A1 (de) |
DK (1) | DK0977636T3 (de) |
ES (1) | ES2191937T3 (de) |
WO (1) | WO1998047630A1 (de) |
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DE10012344A1 (de) * | 2000-03-14 | 2001-09-20 | Voith Paper Patent Gmbh | Vorhang-Auftragsverfahren |
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DE10117668A1 (de) * | 2001-04-09 | 2002-10-10 | Bachofen & Meier Ag Buelach | Vorrichtung zum Beschichten einer laufenden Materialbahn |
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-
1997
- 1997-04-21 DE DE19716466A patent/DE19716466A1/de not_active Withdrawn
-
1998
- 1998-04-20 CN CNB988041707A patent/CN1140357C/zh not_active Expired - Lifetime
- 1998-04-20 JP JP10545006A patent/JP2000510389A/ja active Pending
- 1998-04-20 EP EP98924149A patent/EP0977636B1/de not_active Revoked
- 1998-04-20 DK DK98924149T patent/DK0977636T3/da active
- 1998-04-20 WO PCT/EP1998/002307 patent/WO1998047630A1/de active IP Right Grant
- 1998-04-20 DE DE59807071T patent/DE59807071D1/de not_active Expired - Lifetime
- 1998-04-20 ES ES98924149T patent/ES2191937T3/es not_active Expired - Lifetime
- 1998-04-20 AT AT98924149T patent/ATE231747T1/de not_active IP Right Cessation
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Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10012344A1 (de) * | 2000-03-14 | 2001-09-20 | Voith Paper Patent Gmbh | Vorhang-Auftragsverfahren |
EP1191144A1 (de) * | 2000-09-22 | 2002-03-27 | Voith Paper Patent GmbH | Vorhang-Auftragsvorrichtung |
US6454859B1 (en) | 2000-09-22 | 2002-09-24 | Voith Paper Patent Gmbh | Curtain applicator |
DE10117668A1 (de) * | 2001-04-09 | 2002-10-10 | Bachofen & Meier Ag Buelach | Vorrichtung zum Beschichten einer laufenden Materialbahn |
WO2002081103A1 (de) | 2001-04-09 | 2002-10-17 | Bachofen + Meier Ag Maschinenfabrik | Vorrichtung zum beschichten einer laufenden materialbahn |
US7425246B2 (en) | 2001-04-14 | 2008-09-16 | Dow Global Technologies Inc. | Process for making multilayer coated paper or paperboard |
US7364774B2 (en) | 2002-04-12 | 2008-04-29 | Dow Global Technologies Inc. | Method of producing a multilayer coated substrate having improved barrier properties |
US7473333B2 (en) | 2002-04-12 | 2009-01-06 | Dow Global Technologies Inc. | Process for making coated paper or paperboard |
DE102004016923B4 (de) * | 2004-04-06 | 2006-08-03 | Polytype Converting S.A. | Vorhangbeschichter und Vorhangbeschichtungsverfahren |
DE102004016923A1 (de) * | 2004-04-06 | 2005-11-03 | Polytype S.A. | Vorhangbeschichter und Vorhangbeschichtungsverfahren |
JP2009541043A (ja) * | 2006-06-30 | 2009-11-26 | ポリタイプ コンバーティング ソシエテ アノニム | 多孔質カーテンガイド構造を用いたカーテンコータ、カーテンコータ用カーテンガイド構造及びカーテンガイド構造の製造方法 |
WO2008074508A1 (de) | 2006-12-20 | 2008-06-26 | Inatec Gmbh | Laminierverfahren und-vorrichtung zum auftragen eines films einer klebstoffzusammensetzung auf ein bahnförmiges substrat |
US8551276B2 (en) | 2006-12-20 | 2013-10-08 | Illinois Tool Works, Inc. | Laminating process and apparatus for applying an adhesive-composition film to a web-like substrate |
DE102007000777A1 (de) | 2007-09-27 | 2009-04-02 | Voith Patent Gmbh | Auftragsvorrichtung |
DE102008060749B4 (de) * | 2007-12-11 | 2013-04-04 | Metso Paper, Inc. | Florstreichmaschine und Verfahren zur Regulierung der Applikationsbreite der Florstreichmaschine |
Also Published As
Publication number | Publication date |
---|---|
ATE231747T1 (de) | 2003-02-15 |
CN1140357C (zh) | 2004-03-03 |
ES2191937T3 (es) | 2003-09-16 |
DE19716466A1 (de) | 1998-10-22 |
DE59807071D1 (de) | 2003-03-06 |
JP2000510389A (ja) | 2000-08-15 |
CN1252741A (zh) | 2000-05-10 |
DK0977636T3 (da) | 2003-06-23 |
EP0977636B1 (de) | 2003-01-29 |
EP0977636A1 (de) | 2000-02-09 |
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