FI127813B - Method and system for applying a substance layer onto a moving fiber web by foam application - Google Patents

Method and system for applying a substance layer onto a moving fiber web by foam application Download PDF

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Publication number
FI127813B
FI127813B FI20165926A FI20165926A FI127813B FI 127813 B FI127813 B FI 127813B FI 20165926 A FI20165926 A FI 20165926A FI 20165926 A FI20165926 A FI 20165926A FI 127813 B FI127813 B FI 127813B
Authority
FI
Finland
Prior art keywords
fiber web
application
nozzle
substance
web
Prior art date
Application number
FI20165926A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI20165926L (en
Inventor
Reijo Pietikäinen
Tapio Pitkäniemi
Original Assignee
Valmet Technologies Oy
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 Valmet Technologies Oy filed Critical Valmet Technologies Oy
Priority to FI20165926A priority Critical patent/FI127813B/en
Priority to DE102017128242.4A priority patent/DE102017128242A1/en
Priority to ATA50995/2017A priority patent/AT519423B1/en
Publication of FI20165926L publication Critical patent/FI20165926L/en
Application granted granted Critical
Publication of FI127813B publication Critical patent/FI127813B/en

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/002—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines by using a foamed suspension
    • 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
    • D21H23/32—Addition to the formed paper by contacting paper with an excess of material, e.g. from a reservoir or in a manner necessitating removal of applied excess material from the paper
    • 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
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the 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
    • 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
    • D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D21G9/0009—Paper-making control systems

Landscapes

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

Abstract

The invention relates to a method and a system for applying at least one substance layer (C) in form of foam onto a moving fiber web (W) by foam application through at least one opening of at least one nozzle (15) of an application unit. The substance (C) is flown from the opening the noz-zle (15) on a guide surface (20) and the substance (C) is flown on the guide surface (20) in ambient pressure and tip edge i.e. closest point of the guide surface (15) is located at a distance from a target surface, which target surface is the surface of the fiber web or a surface of a roll (10) or a surface of a fabric or a surface of a belt or a surface of a pond (P).

Description

The invention relates to a method and to a system for applying a substance layer onto a moving fiber web by foam application. More especially the invention relates 5 to a method according to the preamble of claim 1 and to a system according to the preamble of claim 7.
As known from the prior art fiber web making processes typically comprise an assembly formed by a number of apparatuses arranged consecutively in the process line. A typical production and treatment line comprises a head box, a wire section 10 and a press section as well as a subsequent drying section and a reel-up. The production and treatment line can further comprise other devices and sections for finishing the fiber web, for example, a sizer, a calender, and a coating section. The production and treatment line also comprises at least one winder for forming customer rolls as well as a roll packaging apparatus. In this description and the follow15 ing claims by fiber webs are meant for example paper and board webs.
In the production of fiber webs, for example of paper or board webs, various substances are added onto the fiber web in order to achieve the desired end-use properties of the fiber web. In particular, the strength and absorption properties of fiber webs can be improved by using sizing by applying sizing agents, such as 20 starch or other glue chemicals, to the web at the wet or dry end of the web production line.
In coating process a mixture of pigment and binder, usually starch, is applied onto the web usually as a single layer. In the coating process one or more layers of coating color, i.e. mixture of pigments, binders and other additives is added on the 25 top of the web surface. The main purpose of the coating is to improve the appearance and printability of the web by providing a smooth, flat and opaque surface.
In the coating of a fiber web typically a coating device - a coater - is used and in sizing a sizer is used. In connection with the coaters and the sizers different kinds of application technologies for application of the substance on the fiber web are 30 employed, for example curtain technology or blade technology or film transfer technology or spray technology or foam technology. The different application technologies and methods have different operating characteristics and operation windows. In particular, different application methods set different requirements both
20165926 prh 07-12- 2016 for the physical properties and application amounts of the applied substance. The present invention relates to foam application technology.
It is known from prior art to use foam application in a sizing or a coating process to add substance on a web, especially in connection of production of nonwoven 5 products. A foam coating system comprises typically a mixing device, a pumping device, a foaming device, a piping system and an application unit. The foaming is based on powerful mixing for adding air into the liquid-based substance with a surfactant additive, resulting substantial increase in the specific volume and thus making the handling and application of the coating substance much easier at small 10 dry coat weights. The application unit typically comprises a nozzle or nozzles for extruding the foam onto the web.
The foam application method is a robust and simple application method and by it also substances comprising solid particles and/or coating color or sizing agent with high viscosity can be applied onto a moving fiber web. Typically in the foam appli15 cation a slot-applicator i.e. an application unit with a slot nozzle or slot nozzles located very close to the fiber web in direct application and to the surface of the roll or the fabric in indirect application has been used; the application distance i.e. the distance of the nozzle tip to the surface of the fiber web, has been typically about 0,2 - 5 mm, which is very difficult for several reasons. Firstly, the small distance 20 between the nozzle tip and the surface of the web makes the control of applied substance amount and evenness very difficult. The flow of applied substance is very sensitive to the nozzle-to-web distance and therefore requires precise flow control. Small nozzle-to-web distance requires also very precise nozzle position control and adjustment. In addition, variation in the web thickness or in the nozzle 25 position, for example due to machine vibration, can cause changes in nozzle-toweb distance and hence variation in the applied substance amount. Too low supply amount causes breaks in application and too high supply amount causes excessive extrusion and accumulation of the applied substance around the applicator nozzle. The small distance also may cause problems in web break situations dur30 ing production process.
In DE patent application publication 19941194 is disclosed a method for coating a moving web of paper or cardboard with substance, which is applied as a foam and retains its foam structure in the finished coating and which has a covering layer of non-foamed substance. The substance is foamed mechanically or chemically. The 35 substance is glue and/or starch and/or a dispersion of pigments and/or offset coating inks and/or gravure coating inks. The application onto the moving web is done
20165926 prh 07-12- 2016 directly or indirectly for example by a transfer roll. According to one example of this known method the foam is applied through a nozzle into an application chamber, which in moving direction is limited on one side by a nozzle frame on other side by a doctor blade. In the application chamber the foam is in pressurized state and 5 thus an amount of the foam extrudes from the application chamber also to opposite direction to the moving direction of the fiber web and needs to be separately removed. This known method is also very sensitive to balance in between supplied amount of foam, pressure and moving speed of the fiber web. The application chamber is also located below the fiber web, which may cause dripping of the 10 foamed substance and thus require cleaning in order to keep the device and its surroundings in working condition.
An object of the invention is to provide a method and system for applying a substance layer onto a moving fiber web, in particular onto a paper or a board web using foam application, in which the disadvantages of prior art are eliminated or at 15 least minimized.
A particular object of the invention is to provide a method and system for applying a substance layer onto a moving fiber web, in particular onto a paper or a board web, using foam application, in which the disadvantages and problems of in to opposite direction to the moving direction of the fiber web extruding foam and to over 20 sensitive balance in between supplied amount of foam, pressure and moving speed of the fiber web are eliminated or at least minimized.
Another object is to provide a method and system for applying a substance layer onto a fiber web, in which the substance is applied in form of foam, and in which final applied substance layer evenness and weight can be controlled precisely, 25 and in which method is also applicable in cases where small dry solid amounts are to be applied within the substance.
Another further object is to provide a method and system for applying a substance layer onto a moving fiber web, in which requirements set to positioning accuracy as well as mechanical tolerances and mechanical properties of components of the 30 system, in particular, nozzles and rolls of the system, can be reduced.
Another further object is to eliminate or to at least minimize possible problems relating to runnability and maintenance issues, which are especially due to closely to the fiber web positioned nozzles, for example problems of the fiber web touching the nozzle tip and problems of fiber web material accumulation in the nozzle area
20165926 prh 07-12- 2016 and possible damages of the nozzle or other components in the web break situations.
In order to achieve the above objects and those that will come apparent later the method according to the invention is mainly characterized by the features of claim 5 1. The system according to the invention is mainly characterized by the features of claim 7. Advantageous aspects and features of the invention are presented in the dependent claims.
According to the invention the foamed substance is applied through the nozzle opening of the application unit onto a guide surface, on which the foamed sub10 stance is in ambient pressure. Tip edge i.e. closest point of the guide surface is located at a distance from a target surface, which target surface is the surface of the fiber web or a surface of a roll or a surface of a fabric or a surface of a belt or a surface of a pond. During the time the foamed substance is flowing on the guide surface it has time to balance with the ambient pressure and expand, correspond15 ingly. At the application point, i.e. in the point where the foamed substance is transferred from the guide surface to the web, or the transfer surface, foam has already balanced with the ambient pressure and there is little or no expansion taking place, thus less opposite direction foamed substance flow and the supplied amount is less sensitive to application distance and to moving speed of the fiber 20 web, and in general, the required balance parameters are more easily achieved.
Neither is there need to remove the in opposite direction in respect of the travelling direction of the fiber web foamed substance, as the foamed substance flows not to the opposite direction.
According to the invention from the guide surface the foamed substance is flown 25 directly onto the moving fiber web or via a rotating roll surface or via a moving belt or fabric or via a pond onto the moving fiber web.
According to an advantageous feature of the invention distance of the nozzle opening of the application unit is 15 mm or more from the target surface onto which the substance is applied, for example target surface of the roll or of the fab30 ric or of the belt in indirect application or target surface of the fiber web in direct application or target surface of a pond. As the distance between the nozzle opening and the target surface is 15 mm or more, the foamed substance has time to even out and balance and form a continuous, smooth substance layer during its flow on the guide surface.
20165926 prh 07-12- 2016
According to an advantageous feature of the invention the nozzle opening is located above the target surface, which target surface is, depending on the application arrangement, the surface of the fiber web in direct application or the surface of the roll or the surface of the fabric or of the surface the belt or the surface of the pond 5 in indirect application.
According to an advantageous feature of the invention the foamed substance to be applied by the application unit is coating color or sizing agent or a wetting agent or another type of agent affecting fiber web properties. The method and the system according to the invention may for example be utilized in connection of applying a 10 coating color layer of a fiber web for printing products or in connection of sizing on top of a fiber web and in connection of providing a film, a membrane or a lacquer layer for example in converting products.
According to an advantageous feature of the invention the nozzle is a substantially full width slot nozzle or a curtain- or a jet-type nozzle from nozzle opening or noz15 zle openings of which the foamed substance is flown onto the guide surface.
According to an advantageous feature of the invention the nozzle is formed as a distribution channel structure comprising several apart from each other located openings in cross direction of the fiber web on substantially full width of the fiber web, from which openings the treatment substance is guided onto the guide sur20 face.
According to an advantageous feature of the invention the guide surface is located such that the substance flow is in a downward slope in relation to the surface onto which it is applied.
According to an advantageous feature of the invention the guide surface is posi25 tioned at an inclined angle towards the target surface.
According to an advantageous feature of the invention the application substance flow is guided by a guide surface via which it is guided onto the surface of the fiber web in direct application or onto the surface of the roll or of the fabric or of the belt via which the substance is guided onto the surface of the fiber web in indirect ap30 plication or to a pond formed between a pair of rolls, or a pair of a roll and a fabric, or pair of a roll and a belt, a pair of fabric and a belt, or a pair of two belts, or a pair of two fabrics forming a nip, though which nip the fiber web runs.
20165926 prh 07-12- 2016
According to an advantageous feature of the invention the system also comprises means for removing boundary air flow, which means are located before the application area in moving direction of the fiber web i.e. before the area, in which the foamed substance reaches the surface of the fiber web or the roll or the fabric or 5 the belt from the guide surface, in moving direction of the fiber web. The means for removing the boundary air flow may comprise non-contacting means such as suction means or blowing means or a mechanical, contacting means such as a blade doctor.
According to an advantageous feature of the invention the system is located in a 10 wire section or a press section or a drying section or a sizing section or a coating section or a calendering section of a fiber web production line. For example the system can be used for fiber web sizing in the wire section or the press section or for application of a sizing or coating agent in dry end of a fiber web production line.
According to an advantageous feature of the invention the system comprises two 15 rolls, which form a nip in between of them, in which nip air is removed from the foam structure and the treatment substance is pressed to the fiber web.
According to an advantageous feature of the invention at least one layer of the substance in form of foam is applied onto the fiber web one-sidedly or two-sidedly.
According to an advantageous feature of the invention in one-sided application, a 20 support surface is used on the other side of the fiber web. The support surface may be advantageously a rotating roll or a rotating cylinder. The support surface may also be a fabric or a belt or a moving support surface or a non-moving surface or other stationary element.
By the invention is achieved a robust and simple application of a treatment sub25 stance, in which the substance is applied in form of foam, and in which the final applied substance material layer evenness and material layer weight can be controlled precisely and easily.
In the following the invention is described in more detail with reference to the accompanying drawing, in which in figure 1 is schematically shown an advantageous example of the invention, in figure 2 is schematically shown another advantageous example of the invention, in figure 3 is schematically shown yet an advantageous example of the invention,
20165926 prh 07-12- 2016 in figure 4 is schematically shown yet another advantageous example of the invention and in figure 5 is schematically shown yet another advantageous example of the invention.
During the course of this description like numbers and signs will be used to identify corresponding elements according to the different views which illustrate the invention.
In the example of figure 1 a fiber web W is guided on a surface of a rotating roll 10, which supports the fiber web W during application of treatment substance C. The 10 direction of rotation of the roll 10 is indicated by an arrow S. A treatment substance nozzle 15 for applying treatment substance C in form of foam is located at a distance from the surface of the fiber web W and the distance between opening of the nozzle 15 and the surface of the fiber web W is at least 15 mm. From the nozzle the treatment substance is guided onto a guide surface 20, which is located 15 non-contacting the fiber web i.e. at a distance from the fiber web W. The distance between the closest point of the guide surface 20 and the fiber web is 1-200 mm.
The guide surface 20 is inclined in downward slope in relation to the rotation direction S of the roll 10 and the treatment substance C is applied at back side of the guide surface 20 viewed from the roll side. Before applying the treatment sub20 stance C from the guide surface 20 in moving direction of the fiber web W a doctor for removing boundary air layer is located. The doctor 25 can be a doctor blade or an air doctor or another type of boundary removal means.
In the example of figure 2 a fiber web W is guided on a surface of a rotating roll 10, which supports the fiber web W during application of treatment substance. The di25 rection of rotation of the roll 10 is indicated by an arrow S. A treatment substance nozzle 15 for applying treatment substance C in form of foam is located at a distance from the surface of the fiber web W and the distance between the opening of the nozzle 15 and the fiber web is at least 15 mm. From the nozzle 15 the treatment substance is guided onto a guide surface 20, which is located non-contacting 30 the fiber web W i.e. at a distance from the surface of the fiber web W. The distance between the closest point of the guide surface 20 and the fiber web W is 0,1-200 mm. The guide surface 20 is inclined so that treatment substance C flows downwards towards the fiber web W. The treatment substance C is applied on the guide plate 20 in such a way that treatment substance C flow remains between the 35 guide plate 20 and the fiber web W. In particular, the lowest point of the guide
20165926 prh 07-12- 2016 plate 20 can be positioned close to the surface of the fiber web W so that distance between the nearest point of guide plate 20 and the web W is relatively small and this distance is working as a flow metering gap. Before the location, where the treatment substance C is applied from the guide surface 20 onto fiber web W, a 5 non-contact boundary air removal device 25 is located in upstream direction from the application location.
It should be noted that the treatment substance C can be indirectly (Fig. 5) applied onto the web W by applying the treatment substance C first onto the roll surface 10 before bringing the fiber web W into contact with the surface of the roll 10, us10 ing similar application principles as with direct application onto the fiber web W, as explained in Fig 1 and Fig 2.
In the example of figure 3 a fiber web W is guided on a surface of a rotating roll 10, which supports the fiber web W during application of treatment substance C. The fiber web W can also be guided by the other roll 11. The direction of rotation of the 15 roll 10 and roll 11 is indicated by an arrow S. The roll 10 forms a nip with its counter roll 11 and at the nip a pond P of treatment substance C is formed, when the nozzle 15 applies treatment substance C in form of foam. The nozzle opening of the nozzle 15 is located at a distance from the surface of the pond P and the distance is at least 15 mm. From the opening of the nozzle 15 the treatment sub20 stance C is guided onto a guide surface 20, which is located at a distance of 2-500 mm from the surface of the pond P. The guide surface 20 is inclined such way that the treatments substance C flows downwards towards the pond P. In the nip between the rolls 10, 11 the treatment substance C is pressed into the fiber web W.
The nip can also be slightly open so that no pressing occurs. The guide surface 20 25 may also comprise a chute or like for forming a pre-pond before guiding the foamed substance into the pond P.
The pond application can also be two sided, wherein the fiber web W is guided to the nip between the rolls 10, 11 in the middle without wrapping the fiber web W on either of the rolls 10 or 11 and wherein pond is formed on both sides of the web W.
In the example of figure 4 a fiber web W is guided in support of an underpressure device 27 and possibly additionally by a moving fabric 28 in moving direction R. A treatment substance nozzle 15 for applying treatment substance C in form of foam is located at a distance from the corresponding surface of the fiber web W and the distance between the nozzle opening and the fiber web W is at least 15 mm. From the nozzle 10 the treatment substance is guided onto a guide surface 20, which is
20165926 prh 07-12- 2016 located at a distance from the surface of the fiber web W. The distance between the closest point of the guide surface 20 and the fiber web is 2-200mm. The guide surface 20 is inclined in downward slope in relation to the moving direction of the fiber web W. Before applying the treatment substance C from the guide surface 20 5 in moving direction of the fiber web W an air removal device 25 for removing boundary air layer is located.
In the example of figure 5 the treatment substance C is indirectly applied onto the web W by applying the treatment substance C first onto the roll surface 10 before bringing the fiber web W into contact with the surface of the roll 10. In the example 10 of figure 5 a fiber web W is guided on a surface of a rotating roll 10, which supports the fiber web W during application of treatment substance and an optional support roll 29 can be used to press the fiber web W onto the surface of the roll
10. The direction of rotation of the roll 10 is indicated by an arrow S. A treatment substance nozzle 15 for applying treatment substance C in form of foam is located 15 at a distance from the surface of the roll 10 and the distance between the opening of the nozzle and the fiber web is at least 15 mm. From the nozzle 15 the treatment substance is guided onto a guide surface 20, which is located non-contacting the surface of the roll 10 i.e. at a distance from the surface of the roll 10. The distance between the closest point of the guide surface 20 and the surface of the roll 20 10 is 0,1-200 mm. The guide surface 20 is inclined so that treatment substance C flows downwards towards the surface of the roll 10. The treatment substance C is applied on the guide plate 20 in such a way that treatment substance C flow remains between the guide plate 20 and the surface of the roll 10. Before the location, where the treatment substance C is applied from the guide surface 20 onto 25 the surface of the roll 10, a non-contact boundary air removal device 25 is located in upstream direction from the application location.
As can be seen from the examples of the figures 1 - 5 distance of the nozzle opening, which opening is located at the tip of the nozzle 15, of the application unit, by which the treatment substance C is applied directly or indirectly onto the 30 fiber web W, is over 15 mm from the target surface onto which the substance is applied, for example the surface of the roll 10 or of the fabric or the belt in indirect application or the surface of the fiber web W in direct application or the surface of the pond P and the substance is flown via the guide surface 20 onto the target surface and the tip edge of the guide surface 20 i.e. the closest point of the guide sur35 face 20 is located at a distance from the target surface, onto which the substance is to be applied. The treatment substance C to be applied by the nozzle 15 of the application unit is advantageously coating color or sizing agent. The nozzle 15 can be a substantially full width slot nozzle or a curtain- or a jet-type nozzle or formed as a distribution channel structure comprising several apart from each other located openings on substantially full width of the fiber web, from which openings the 5 treatment substance is guided onto the guide surface 20, which is inclined. The treatment substance C flow is guided by the inclined guide surface 20 via which it is guided onto the surface of the fiber web W in direct application or onto the surface of the roll or the fabric or the belt via which the substance is guided onto the surface of the fiber web in indirect application or to a pond formed between two 10 surfaces, for example two rolls forming a nip, through which nip the fiber web runs.
The system can also comprise means 25 for removing boundary air flow, which means are located before the application area in moving direction of the fiber web W. The means 25 for removing the boundary air flow may comprise a noncontacting device such as suction means or blow means, which can be used in di15 reet application of the treatment substance C to the fiber web W, or a contacting means, like a doctor blade, which can be used when application of treatment substance C is done indirectly via a transfer surface (for example the roll 10) onto the surface of the fiber web W.
20165926 prh 07-12- 2016
Reference signs used in the drawing roll roll nozzle
20 guide surface means for removing boundary air flow underpressure device fabric support roll
C treatment substance
P pond
R direction of movement
S direction of rotation
W fiber web

Claims (15)

1. Menetelmä ainakin yhden ainekerroksen (C) vaahdon muodossa applikoimiseksi liikkuvalle kuiturainalle (W) vaahtoapplikoinnilla applikointiyksikön ainakin yhden suuttimen (15) ainakin yhden aukon läpi, tunnettu siitä, ettäA method for applying at least one layer of material (C) in the form of a foam to a moving fibrous web (W) by foam application through at least one opening of at least one nozzle (15) of the application unit, characterized in that: 5 aine (C) virtautetaan suuttimen (15) aukosta ohjauspinnalle (20), että aine virtautetaan ohjauspinnalla (20) ympäristön paineessa, ja että ohjauspinnan kärkireuna eli lähin piste on sijoitettu etäisyydelle kohdepinnasta, joka kohdepinta on kuiturainan pinta tai telan (10) pinta tai kudoksen pinta tai hihnan pinta tai lammikon (P) pinta.The substance (C) flowing from the opening of the nozzle (15) to the guide surface (20) so that the substance is flowing through the guide surface (20) at ambient pressure, and the surface of the fabric or the surface of the belt or the surface of the pond (P). 1010 2. Patenttivaatimuksen 1 mukainen menetelmä, tunnettu siitä, että suuttimen (15) aukko / aukot on / ovat 15 mm:n tai pidemmällä etäisyydellä kohdepinnasta.Method according to Claim 1, characterized in that the orifice (15) has an orifice (s) of at least 15 mm from the target surface. 3. Patenttivaatimuksen 1 tai 2 mukainen menetelmä, tunnettu siitä, että aukko / aukot ovat sijoitetut kohdepinnan yläpuolelle.Method according to claim 1 or 2, characterized in that the aperture (s) is located above the target surface. 1515 4. Jonkin edellisen patenttivaatimuksen mukainen menetelmä, tunnettu siitä, että applikointiyksiköllä applikoitava aine (C) on päällystyspasta tai pintaliimausaine tai kostutusaine tai muun tyyppinen kuiturainan ominaisuuksiin vaikuttava aine.Method according to one of the preceding claims, characterized in that the substance (C) applied to the application unit is a coating paste or a surface sizing agent or a wetting agent or another type of agent affecting the properties of the fiber web. 20165926 prh 18-10-201720165926 prh 18-10-2017 5. Jonkin edellisen patenttivaatimuksen mukainen menetelmä, tunnettu siitä, 20 että ainevirta ohjataan ohjauspinnalla (20) kuiturainan (W) pinnalle suoras- sa applikoinnissa tai telan (10) pinnalle tai kudoksen pinnalle tai hihnan pinnalle, jonka pinnan kautta aine (C) ohjataan kuiturainan (W) pinnalle epäsuorassa applikoinnissa tai lammikkoon (P), joka on muodostettu nipin, jonka nipin kautta kuituraina (W) kulkee, muodostavan telaparin (10, 11) tai te25 la-kudosparin tai tela-hihna parin tai kahden hihnan tai kahden kudoksen parin väliin.Method according to one of the preceding claims, characterized in that the material flow is guided by a guiding surface (20) on the surface of the fibrous web (W) in direct application or on the roll (10) or the surface of the web or belt (W) on the surface in an indirect application, or in a pool (P) formed by a pair of rolls (10, 11) forming a nip through which the fiber web (W) passes, or a pair of te25a or rolls or two pairs of webs between. 6. Jonkin edellisen patenttivaatimuksen mukainen menetelmä, tunnettu siitä, että ainakin yksi ainekerros (C) vaahdon muodossa applikoidaan kuiturai30 nalle yksipuoleisesti tai kaksipuoleisesti.Method according to one of the preceding claims, characterized in that at least one layer of material (C) in the form of a foam is applied to the fibrous web unilaterally or bilaterally. 20165926 prh 18-10-201720165926 prh 18-10-2017 7. Järjestelmä ainekerroksen (C) applikoimiseksi liikkuvalle kuiturainalle (W) vaahtoapplikoinnilla käsittäen applikointiyksikön ainakin yhden suuttimen (15) ainakin yhden aukon, tunnettu siitä, että järjestelmä käsittää ohjauspinnan (20) aineen ohjaamiseksi kohdepinnalle ja että ohjauspinnan lähinA system for applying a layer of material (C) to a moving fibrous web (W) by foam application, comprising at least one opening of the at least one nozzle (15) of the application unit, characterized in that the system comprises a guide surface (20) for guiding 5 piste ja kohdepinta ovat sijoitetut välimatkan päähän toisistaan.The 5 points and the target surface are spaced apart. 8. Patenttivaatimuksen 7 mukainen järjestelmä, tunnettu siitä, että suuttimen (15) aukko / aukot on / ovat 15 mm:n tai pidemmällä etäisyydellä kohdepinnasta.System according to Claim 7, characterized in that the orifice (15) has an orifice (s) of at least 15 mm from the target surface. 9. Patenttivaatimuksen 7 tai 8 mukainen järjestelmä, tunnettu siitä, että koh-System according to claim 7 or 8, characterized in that 10 depinta on kuiturainan pinta suorassa applikointijärjestelmässä tai telan pinta tai kudoksen pinta tai hihnan pinta epäsuorassa applikointijärjestelmässä tai nipin muodostavan, jonka nipin kautta kuituraina ohjataan, telaparin (10, 11) tai tela-kudosparin tai tela-hihnaparin tai kudos-hihnaparin tai kahden hihnan parin tai kahden kudoksen nipin parin väliin muodostetun lammikon10 is the surface of the fibrous web in a direct application system or the surface of a roll or the surface of a fabric or the belt in an indirect application system or a pair of rolls (10, 11) or or a pond formed between two pairs of tissue nipples 15 pinnalle.15 surface. 10. Jonkin patenttivaatimuksen 7-9 mukainen järjestelmä, tunnettu siitä, että suutin (15) on olennaisesti täysleveä rakosuutin tai verho- tai jet-tyyppinen suutin.System according to one of Claims 7 to 9, characterized in that the nozzle (15) is a substantially full-width slot nozzle or a curtain or jet type nozzle. 11. Jonkin patenttivaatimuksen 7-10 mukainen järjestelmä, tunnettu siitä, ettäA system according to any one of claims 7 to 10, characterized in that 20 suutin (15) on muodostettu jakokanavarakenteisena käsittäen useita toisistaan välimatkan päähän sijoitettuja aukkoja olennaisesti kuiturainan koko leveydelle, joista aukoista käsittelyaine (C) ohjataan ohjauspinnalle.The nozzle (15) is formed as a manifold structure comprising a plurality of spaced apart apertures substantially throughout the width of the fibrous web, from which apertures are directed to the guide surface. 12. Jonkin patenttivaatimuksen 7-11 mukainen järjestelmä, tunnettu siitä, että ohjauspinta on sijoitettu siten, että applikointiainevirta on kohtisuorassa taiSystem according to one of Claims 7 to 11, characterized in that the guiding surface is arranged such that the application material flow is perpendicular or 25 alaspäin viettävä suhteessa pintaan, jolle sitä applikoidaan.25 downwardly relative to the surface to which it is to be applied. 13. Jonkin patenttivaatimuksen 7-12 mukainen järjestelmä, tunnettu siitä, että järjestelmä myös käsittää välineen (25) rajakerrosilmavirtauksen poistamiseksi, joka väline (25) on sijoitetut ennen applikointialuetta kuiturainan (W) liikesuunnassa ja että väline (25) rajakerrosilmavirtauksen poistamisek-A system according to any one of claims 7 to 12, characterized in that the system also comprises means (25) for removing the boundary layer air flow, which means (25) is disposed prior to the application region in the direction of motion of the fibrous web (W). 30 si käsittää imuvälineen, puhallusvälineen tai koskettavan mekaanisen rajakerrosilmavirtauksen poistovälineen tai ainakin kahden näistä yhdistelmän.It comprises a suction means, a blowing means, or a tactile mechanical boundary layer airflow outlet means, or a combination of at least two of these. 14. Jonkin patenttivaatimuksen 7-13 mukainen järjestelmä, tunnettu siitä, että aukko / aukot ovat sijoitetut kohdepinnan yläpuolelle.System according to one of Claims 7 to 13, characterized in that the aperture (s) is located above the target surface. 15. Jonkin patenttivaatimuksen 7-14 mukainen järjestelmä, tunnettu siitä, että järjestelmä on sijoitettu ainakin yhteen seuraavista lokaatioista: kuiturainan valmistuslinjan viiraosa tai puristinosa tai kuivatusosa tai pintaliimausosa tai päällystysosa tai kalanteroimisosa.A system according to any one of claims 7 to 14, characterized in that the system is located in at least one of the following locations: a wire section or press section or dryer section or surface sizing section or coating section or calendering section of a fiber web production line.
FI20165926A 2016-12-07 2016-12-07 Method and system for applying a substance layer onto a moving fiber web by foam application FI127813B (en)

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FI20165926A FI127813B (en) 2016-12-07 2016-12-07 Method and system for applying a substance layer onto a moving fiber web by foam application
DE102017128242.4A DE102017128242A1 (en) 2016-12-07 2017-11-29 Method and system for applying a layer of a substance to a moving fibrous web by means of foam application
ATA50995/2017A AT519423B1 (en) 2016-12-07 2017-12-01 METHOD AND SYSTEM FOR THE APPLICATION OF A LAYER OF A SUBSTANCE TO A MOVING FIBERWAY THROUGH FOAM CARRIER

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US11591755B2 (en) 2015-11-03 2023-02-28 Kimberly-Clark Worldwide, Inc. Paper tissue with high bulk and low lint
WO2019108172A1 (en) 2017-11-29 2019-06-06 Kimberly-Clark Worldwide, Inc. Fibrous sheet with improved properties
CN112469857B (en) 2018-07-25 2022-06-17 金伯利-克拉克环球有限公司 Method for producing three-dimensional foam-laid nonwovens
EP3910103A1 (en) * 2020-05-15 2021-11-17 Valmet Technologies Oy Method and system for applying a substance layer onto a moving fiber web by foam application

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