EP3649287B1 - Manchon de presse et son utilisation ainsi que procédé de fabrication dudit manchon de presse - Google Patents

Manchon de presse et son utilisation ainsi que procédé de fabrication dudit manchon de presse Download PDF

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Publication number
EP3649287B1
EP3649287B1 EP18731420.8A EP18731420A EP3649287B1 EP 3649287 B1 EP3649287 B1 EP 3649287B1 EP 18731420 A EP18731420 A EP 18731420A EP 3649287 B1 EP3649287 B1 EP 3649287B1
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EP
European Patent Office
Prior art keywords
press
component
polyol
press cover
crosslinker
Prior art date
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Application number
EP18731420.8A
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German (de)
English (en)
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EP3649287A1 (fr
Inventor
Delphine Delmas
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Voith Patent GmbH
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Voith Patent GmbH
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0209—Wet presses with extended press nip
    • D21F3/0218—Shoe presses
    • D21F3/0227—Belts or sleeves therefor
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/08—Pressure rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B3/00—Presses characterised by the use of rotary pressing members, e.g. rollers, rings, discs
    • B30B3/005—Roll constructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B3/00—Presses characterised by the use of rotary pressing members, e.g. rollers, rings, discs
    • B30B3/04—Presses characterised by the use of rotary pressing members, e.g. rollers, rings, discs co-operating with one another, e.g. with co-operating cones
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0209—Wet presses with extended press nip
    • D21F3/0218—Shoe presses
    • D21F3/0227—Belts or sleeves therefor
    • D21F3/0236—Belts or sleeves therefor manufacturing methods
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/04—Arrangements thereof

Definitions

  • the invention is based on a press jacket, in particular for a press device for treating a fibrous web, e.g. for smoothing or dewatering it, as well as a corresponding method for producing such a press jacket, in detail according to the independent claims.
  • Press devices such as shoe presses, have long been part of modern paper machines. They essentially comprise a stationary shoe (also called a press shoe), which extends in a cross-machine direction, and a press cover that encircles the stationary shoe. The latter is deformable and essentially assumes a tubular shape in operation.
  • the shoe is shaped in such a way that it forms a press nip (press nip) with a counter roller.
  • the press nip is defined by the contact surface of the counter roll in the shoe.
  • the shoe is designed to be movable and can be moved to the counter roll.
  • the polyurethanes known to date from the prior art are still not able to achieve a stability and service life that is satisfactory for the customer in every application.
  • These materials also have disadvantages in the manufacture of the press sleeves.
  • the adjustment of the viscosity of the reaction mixture of prepolymer and crosslinker was problematic. If thicker individual layers per coating pass of the polymer layer were previously desired, this was not possible. Rather, a second coating pass had to be carried out.
  • inclusions in the form of air bubbles often resulted as soon as the reinforcement structure, e.g. in the form of threads, was encased with the material. Such air bubbles can also arise in layers without a reinforcement structure. The problem with air bubbles is that they often lead to premature failure of the press jacket during operation.
  • the pamphlet WO 2015/086555 A1 discloses a press cover in the form of an endless belt or hose for a shoe press roll, comprising at least one polymer layer, the polymer layer containing or being made from a polyurethane, the polyurethane being formed from a prepolymer and a crosslinker, and the prepolymer being a reaction product 1,4-phenylene diisocyanate (PPDI) and at least one polyol, and wherein the crosslinker comprises at least two components, namely a first component comprising diamine and a second component.
  • PPDI 1,4-phenylene diisocyanate
  • the present invention relates to such generic objects mentioned at the outset.
  • the object of the invention to provide a press jacket and a method for its production which avoids the disadvantages of the prior art.
  • the object is to provide a press cover which has increased stability and service life compared to the press cutters known from the prior art.
  • the inventor has recognized that the object on which the invention is based can be achieved by using a crosslinker comprising a diamine and a carbonic acid ester, such as propylene carbonate or ethylene carbonate.
  • a carbonic acid ester such as propylene carbonate or ethylene carbonate.
  • the addition of a carbonic acid ester to the crosslinker in the production of a polyurethane-containing press jacket, especially by the method described in the Figure 3 is extremely unusual. This is because it is usually used as a solvent in the plastics industry for purposes that are outside of polyurethane production. It was surprisingly found that the prepolymer / crosslinker mixture had a lower viscosity with an optimal pot life at the same time.
  • the resulting polymer which is initially of low viscosity, can soak the reinforcement structure (for example made of threads) particularly well before it solidifies as a result of curing. Particularly rough surfaces can also be wetted. In both cases, air bubbles can escape very well over time.
  • almost bubble-free press jackets can therefore be produced by means of rotational molding, which allow polymer layers up to 40 mm thick - which can be produced in one coating pass, that is, monolithically.
  • a press device means a shoe press, for example for dewatering or treatment, such as smoothing a fibrous web.
  • the shoe press comprises a shoe press roll and a counter roll, which together form or delimit a press nip.
  • the shoe press roll further comprises a rotating press cover and a standing one Press element, the so-called press shoe.
  • the latter is supported on a load-bearing, also standing yoke - for example via hydraulic pressing elements - and is pressed against the surrounding press casing.
  • the press jacket rotates relative to the stationary press shoe and yoke and is thereby pressed against the counter roll in the press nip.
  • the press shoe and yoke are arranged radially inside the press jacket.
  • press element does not rotate relative to the shoe press roll or the counter roll, but can move in a translatory manner - towards the counter roll and away from it, preferably in the radial direction thereof - and thus relative to the counter roll.
  • press felts running continuously in the circumferential direction and / or further continuously running press belts can be guided through the press nip of the shoe press.
  • Such a shoe press can of course comprise more than one press nip.
  • a fibrous web in the context of the invention is to be understood as meaning a scrim or tangle of fibers, such as wood fibers, plastic fibers, glass fibers, carbon fibers, additives, or the like.
  • the fibrous web can be designed as a paper, cardboard or tissue web. It can essentially comprise wood fibers, small amounts of other fibers or also additives and additives being able to be present. This is left to the specialist depending on the application.
  • a press jacket in the sense of the invention is to be understood as a belt, hose or jacket which, as shown, is guided together with a fibrous web through the press nip of a shoe press.
  • the radially outermost surface (polymer layer) of the press jacket can come into contact with a press felt during normal operation, by which the fibrous web to be dewatered is directly supported.
  • the press cover can also come into direct contact with the fibrous web during normal operation, for example to smooth it.
  • the press jacket is designed as a closed jacket (hose) which is endless in the circumferential direction around its longitudinal axis.
  • the press cover can be held at these axial ends by two lateral tensioning disks in order to form the shoe press roll.
  • the press cover can be guided over the press shoe and several guide rollers, as is the case with open shoe presses. Regardless of whether the press cover is guided by the clamping disks or the guide rollers, the press shoe (or the guide rollers) comes into contact (temporarily) with part of the radially innermost surface of the press cover.
  • the radially outermost surface of such a press jacket for example the radially outermost polymer layer of the same, can be provided with grooves and / or blind bores.
  • the press jacket can be made partially or completely from a polymer.
  • a pourable, curable, preferably elastomeric polymer such as polyurethane can be used as the polymer.
  • the polymer can consequently be set as a cast elastomer.
  • polymer layer is meant a layer which comprises such a pourable, curable, preferably elastomeric polymer or is produced entirely from it.
  • the polymer layer can preferably be a cured layer produced in one piece by primary molding. In other words, it is originally monolithically formed, i.e. made by casting, for example.
  • the term “one-piece” also includes cases in which the one layer was again produced from several layers of the same material when the polymer was cast. However, this is only insofar as these layers are essentially no longer visible after curing, but a single, preferably uniform layer results. The same applies to the finished press jacket.
  • a plurality of polymer layers When a plurality of polymer layers are provided, they can be arranged one above the other as seen in the radial direction - at least in sections over the width of the press jacket. At least in sections across the width of the press jacket means that the press jacket is, for example, only single-layered at its axial ends, whereas it is formed in two or more layers between the axial ends.
  • the polymer layers can also extend over the entire width of the press jacket.
  • the thickness of the press jacket - and thus the thickness of the individual polymer layers - can also vary in sections along the longitudinal axis in a section through its longitudinal axis.
  • the radially outermost polymer layer in the area of the width edges of the press jacket can be smaller than in the middle of the press jacket.
  • the radially outermost polymer layer can be less thick in the region of the width edges than a radially inner or radially innermost polymer layer.
  • Precisely one, two or three polymer layers are preferably provided. These can be identical in terms of their polymer or vary in terms of their hardness or stoichiometry of the prepolymer.
  • a total thickness of the finished press jacket in a section through its longitudinal axis, measured in the radial direction, can be 5 to 10 mm, preferably 5 to 7, particularly preferably 5 to 6 mm.
  • the press jacket when a single layer is provided, the press jacket can be made from only one cast, ie monolithically, so that the single layer has the thickness just mentioned.
  • a finished press jacket within the meaning of the invention is one whose at least one polymer layer is cured and finally processed, i.e. ready for use in a shoe press, for example, for the purpose mentioned above.
  • a finished polymer layer means a layer that has cured.
  • the press cover has a reinforcement structure.
  • reinforcement structure in the context of the invention means reinforcement of the at least one layer containing or consisting of the polymer - that is to say the polymer layer.
  • the reinforcement structure can be completely embedded in the polymer layer, so that the reinforcement structure does not go beyond the delimitation of the polymer layer.
  • the polymer layer takes on the role of a matrix which surrounds the reinforcement structure and binds to the matrix as a result of adhesive or cohesive forces.
  • Such a reinforcement structure can reinforce structures such as textile line structures - z. B. yarns or twisted threads - and / or textile fabrics - such. B.
  • woven, knitted, knitted fabrics, braids or scrims - include and can be produced from a corresponding starting material, for example by winding.
  • Starting material is understood to mean that material or semi-finished product by means of which the reinforcement structure of the finished press jacket according to the invention is produced.
  • Such a reinforcement structure can be embedded in the polymer layer in or after step e) according to the method according to the invention. After being embedded in the corresponding polymer layer, the starting material thus forms the reinforcement structure of the finished press jacket according to the invention.
  • the crosslinker comprises at least two components
  • this is understood to mean exemplary embodiments which comprise exactly two, exactly three, exactly four or exactly five or more than five components.
  • the crosslinker should be made from at least two components.
  • the percentages of the two, three, four, five or more components can be chosen so that there are exactly two, three, four, five or more components.
  • the percentages of each of the at least two components of the crosslinking agent can be selected so that their total sum does not exceed 100% by weight.
  • the crosslinker in principle, it would be conceivable for the crosslinker to have a third component (K3) which is selected from at least one polyol, preferably bifunctional polyol, whose molecular weight is preferably 1,000 to 4,000 g / mol, such as polyester polyol, in particular polycaprolactone polyol; Polyether polyols, in particular polytetramethylene ether glycol (PTMEG), polypropylene glycol (PPG), polyethylene glycol (PEG), polyhexamethylene ether glycol, polycarbonate polyol, polyether carbonate polyol, polybutadiene polyol, perfluoropolyether polyol, silicone polyol or mixtures thereof.
  • PTMEG polytetramethylene ether glycol
  • PPG polypropylene glycol
  • PEG polyethylene glycol
  • polyhexamethylene ether glycol polycarbonate polyol
  • polyether carbonate polyol polybutadiene polyol
  • a fourth component (K4) is also added, which comprises a catalyst or is formed by it, the fourth component (K4) being selected is made from tertiary amines, such as 1,4-diazabicyclo (2.2.2) octane (DABCO), triethylamine, metal compounds, organometallic compounds - e.g. comprising or containing bismuth, such as bismuth neodecanoate, mercury, aluminum, zirconium, iron, calcium, sodium , Potassium, lead, tin, titanium - or mixtures of the aforementioned substances.
  • tertiary amines such as 1,4-diazabicyclo (2.2.2) octane (DABCO), triethylamine, metal compounds, organometallic compounds - e.g. comprising or containing bismuth, such as bismuth neodecanoate, mercury, aluminum, zirconium, iron, calcium, sodium , Potassium, lead
  • the reaction rate of the crosslinking - and thus the production process of the press jacket - can in principle be better controlled if such a catalyst is mixed with the crosslinker.
  • the proportion of the catalyst can be reduced according to the invention. It would therefore be conceivable in principle to dispense with component K4, that is to say the catalyst.
  • each of the named components could in turn consist of further sub-components.
  • the substances according to the invention are preferably the components themselves.
  • the components according to the invention can, for example, be added to the crosslinker in accordance with the process according to the invention before they are reacted with the prepolymer.
  • the term "at most" based on a certain percentage of a component means that the proportion comprises at least> 0%, e.g. 0.01% or more, but no more than the certain percentage. If, for example, there is talk of "at most 15%", the interval between> 0% is always greater, for example. 0.01% and (exactly) 15% meant. In any case, all three, four, five or more components according to the invention are always and individually represented in the crosslinker. On the other hand, when it is said that "at least” e.g. 20% of a component is present, then 20 and more, i.e. up to 100% of the component are meant. The terms mentioned are to be supplemented by the corresponding molar or weight information.
  • aliphatic amines When aliphatic amines are mentioned in the context of the invention, this can mean primary aliphatic amines, secondary aliphatic amines or tertiary aliphatic amines. In a preferred embodiment, however, the aliphatic amines are primary aliphatic amines, since this is the best way to achieve the advantages according to the invention. This applies analogously to aromatic amines as well as to (aromatic) diamines.
  • the polyol of the prepolymer can preferably be selected from: polyester polyol, in particular polycaprolactone polyol, polyether polyol, in particular polytetramethylene ether glycol (PTMEG), polypropylene glycol (PPG), polyethylene glycol (PEG) or polyhexamethylene ether glycol; Polycarbonate polyol, polyether carbonate polyol, polybutadiene polyol or mixtures thereof.
  • polyester polyol in particular polycaprolactone polyol
  • polyether polyol in particular polytetramethylene ether glycol (PTMEG), polypropylene glycol (PPG), polyethylene glycol (PEG) or polyhexamethylene ether glycol
  • PTMEG polytetramethylene ether glycol
  • PPG polypropylene glycol
  • PEG polyethylene glycol
  • Polycarbonate polyol polyether carbonate polyol
  • polybutadiene polyol polybutadiene polyol or mixtures thereof.
  • the invention also relates to a shoe press roll for a shoe press for dewatering a fibrous web, the press roll having at least one press cover according to the invention.
  • the invention also relates to a shoe press for dewatering a fibrous web, preferably a paper, cardboard, tissue or cellulose web, comprising a shoe press roll and a counter roll which together form or delimit a nip, the shoe press roll comprising a circumferential press cover, the press cover is designed according to the invention.
  • the invention relates to the use of a press jacket according to the invention for a press, such as a shoe press, for dewatering a fibrous web, preferably a paper, cardboard, tissue or cellulose web.
  • a shoe press 10 which in the present case comprises a shoe press roll 12 according to the invention and a counter roll 14.
  • Shoe press roll 12 and counter roll 14 are arranged parallel to one another with regard to their longitudinal axes. Together they form a nip 22 or delimit one.
  • the shoe press roll 12 is composed of a shoe 16, a standing yoke 18 carrying this and a press cover 20.
  • Shoe 16 and yoke 18 are arranged in a fixed manner with respect to counter roll 14 and press cover 20, respectively. That means they don't rotate.
  • the shoe 16 is supported by the yoke 18 and is pressed against the radially innermost surface of the press jacket 20, which is circumferential relative thereto, via hydraulic press elements (not shown).
  • the press jacket 20, which surrounds the shoe 16 and yoke 18 in the circumferential direction, rotates about its longitudinal axis in the opposite direction of rotation to the counter roll 14. Due to the concave design of the shoe 16 on its side facing the counter roll 14, a comparatively long nip 22 results.
  • the shoe press 10 is particularly suitable for dewatering fibrous webs 24.
  • a fibrous web 24 with one or two press felts 26, 26 ′ is passed through the press nip 22.
  • a pressure is exerted indirectly on the fibrous web 24 in the nip 22 by the press felts 26, 26 '. This takes place in that the radially outermost surface of the counter roller 14 on the one hand and the radially outermost surface of the press jacket 20 come into direct contact with the corresponding press felts 26, 26 '.
  • the liquid emerging from the fibrous web 24 is temporarily absorbed by the press felt (s) 26, 26 'and any depressions (not shown) provided in the press jacket surface. After leaving the nip 22, the liquid absorbed by the depressions in the press jacket 20 is thrown off before the press jacket 20 re-enters the press nip 22. In addition, the water taken up by the press felt 26, 26 ′ can be removed with suction elements after it has left the press nip 22.
  • Fig. 2 shows a possible embodiment of the invention in a partially illustrated cross section along the longitudinal axis 20 ′ of the finished press jacket 20, which is not to scale.
  • the (precisely) one polymer layer 20.1 of the press jacket 20 can be seen.
  • the press jacket 20 it would be conceivable for the press jacket 20 to consist of several polymer layers arranged radially one above the other. For example, exactly two polymer layers would be conceivable, a radially inner (shown in dashed lines) 20.2 and a radially outermost polymer layer (shown in solid lines) 20.1.
  • the multiple polymer layers could then be produced according to the invention.
  • a reinforcement structure 20 ′′ is embedded in the at least one polymer layer 20.1. This is indicated by the hatched circles, which can be textile flat or line structures such as fibers.
  • the reinforcement structure 20 ′′ is completely embedded in the polymer layer 20.1. That means that the The reinforcement structure 20 ′′ does not extend beyond the boundaries of the polymer layer 20.1 in which it is embedded.
  • Fig. 3 shows in a highly schematic side view a device for producing a press jacket 20 according to the invention.
  • the device is set up in such a way that it carries out the method according to the invention for producing the press jacket 20.
  • the device has exactly one cylindrical winding mandrel 4, with a reinforcing structure 20 ′′ made of a starting material 20 ′′ being applied in a spiral to its radially outermost jacket surface.
  • the illustration shows an initial stage of the manufacturing process.
  • one end is for this purpose of the starting material 20 '''on a polymer which is arranged on the outer circumference of the winding mandrel 4.
  • one end of the starting material 20''' could also rest or be applied directly to the winding mandrel 4 without a polymer initially being provided between the starting material 20 ′′ ′′ and the winding mandrel 4.
  • the starting material 20 ′′ ′′ can be a flat textile structure or line structure.
  • the winding mandrel 4 is rotatably mounted about its longitudinal axis 20 ', which corresponds to the longitudinal axis of the press jacket to be produced. Longitudinal axis 20 'runs perpendicularly into the plane of the drawing here.
  • a casting material such as castable, curable elastomeric polymer, for example polyurethane, is applied from above to the radially outermost lateral surface of the winding mandrel 4 or to the starting material 20 '''via a line 5 through a casting nozzle 6.
  • Such a casting material can be selected, for example with regard to its pot life and viscosity, in such a way that it does not drip down from the winding mandrel 4 during casting.
  • the winding mandrel 4 is rotated in the direction of the arrow about its longitudinal axis.
  • the pouring nozzle 6 is moved via a suitable, in Fig. 3 Guide not shown in more detail, parallel to the longitudinal axis 20 ′, guided along this relative to the winding mandrel 4.
  • the starting material 20 ''' is unrolled and wound onto the rotating mandrel 4 to form coils.
  • the casting material can be replaced by the starting material 20 ''' get through to the winding mandrel 4.
  • the polymer forms a first, here radially innermost and preferably elastomeric polymer layer 20.1 of the press jacket, of which FIG Fig. 3 only part is shown.
  • the casting material emerging from the casting nozzle 6 is a mixture of a prepolymer and a crosslinker.
  • the former is provided from a prepolymer container, not shown, in which it is stored or mixed.
  • the reaction product can comprise an isocyanate according to the invention and a polyol.
  • the reaction product container prepolymer container
  • it can be present, for example, in the form of a prepolymer made from the substances just mentioned.
  • the crosslinker can be provided in a crosslinker container.
  • the crosslinker comprises at least one first component K1 according to the invention and a second component K2 according to the invention.
  • the crosslinker can also comprise a third component K3 according to the invention comprising at least one polyol and / or also a fourth component according to the invention, such as a catalyst.
  • a fifth or further component would also be fundamentally conceivable.
  • the crosslinker with its corresponding components can be mixed directly in the crosslinker container. It is also conceivable, however, that the device comprises a corresponding individual container for each of the components, which is connected to the crosslinker container in a flow-conducting manner via lines not shown in order to produce the crosslinker according to the invention in the crosslinker container.
  • the prepolymer container and the crosslinker container are assigned to the device for producing a press jacket 20. They are connected in a flow-conducting manner to a mixing chamber (not shown) upstream of the pouring nozzle 6 in the direction of flow via lines also not shown.
  • the prepolymer-crosslinker mixture is thus produced upstream and outside the casting nozzle 6, that is to say mixed in the mixing chamber. Independently of the production of the mixture, it is then applied to the surface of the winding mandrel 4 to form the at least one polymer layer 20.1 of the press jacket 20.
  • an endless cylindrical tubular press jacket 20 which is closed around its longitudinal axis 20 'and whose inner circumference essentially corresponds to the outer circumference of the winding mandrel 4, is gradually produced over the width of the winding mandrel 4 .
  • the finished press cover 20 is finally removed from the at least one winding mandrel 4.
  • the press jacket 20 is designed according to the invention.
  • the single polymer layer shown there is (partially or completely) made of a polyurethane.
  • the polyurethane is formed from a prepolymer according to the invention - which is a reaction product of at least one polyol with an isocyanate - and a crosslinker.
  • the crosslinker includes, for example, the components mentioned at the beginning. However, it can also have further components known to the person skilled in the art.
  • a particularly high stability of the press jacket 20 is achieved with regard to the mechanical and dynamic properties such as stability, surface hardness, resistance to pressure, temperature and hydrolysis as well as low swelling and lead to an extended service life of the same during operation.
  • virtually bubble-free press jackets can be produced by means of the rotational molding process described in the figures, which enable polymer layers up to 40 mm thick in one coating pass.
  • the reinforcement structure 20 ′′ of the at least one polymer layer 20.1, 20.2 could also be made up of several starting materials 20 ′′ ′′, laid one on top of the other in the radial direction, each running in the longitudinal axis direction and in the circumferential direction of the press jacket 20.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Paper (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Polyurethanes Or Polyureas (AREA)

Claims (16)

  1. Chemise de presse (20) se présentant sous la forme d'une bande sans fin ou d'un tuyau sans fin destiné(e) à un rouleau de presse à sabot (12), et comprenant au moins une couche de polymère, la couche de polymère contenant un polyuréthane ou étant produite à partir de celui-ci, le polyuréthane étant formé à partir d'un prépolymère et d'un agent de réticulation, et le prépolymère étant un produit de réaction du 1,4-phénylène-diisocyanate (PPDI) et d'au moins un polyol, l'agent de réticulation comprenant au moins deux composants, à savoir un premier composant comprenant une diamine et un deuxième composant, caractérisée en ce que le deuxième composant est choisi dans le groupe des esters d'acide carbonique.
  2. Chemise de presse (20) selon la revendication 1, caractérisée en ce que le premier composant est choisi parmi la 4,4'-méthylènebis(3-chloro-2,6-diéthylaniline) (MCDEA), le 4,4'-diaminodicyclohexylméthane et leurs mélanges.
  3. Chemise de presse (20) selon la revendication 1 ou 2, caractérisée en ce que l'agent de réticulation contient 25 % en poids à 95 % en poids, de préférence 30 % en poids à 70 % en poids, du premier composant.
  4. Chemise de presse (20) selon l'une des revendications 1 à 3, caractérisée en ce que le deuxième composant est ou comprend du carbonate de propylène.
  5. Chemise de presse (20) selon l'une des revendications 1 à 4, caractérisée en ce que l'agent de réticulation contient 1 % en poids à 25 % en poids du deuxième composant.
  6. Chemise de presse (20) selon l'une des revendications 1 à 5, caractérisée en ce que l'agent de réticulation comprend un troisième composant et le troisième composant est choisi parmi au moins un polyol, de préférence un polyol bifonctionnel dont le poids moléculaire est de préférence de 1000 à 4000 g/mol, comme le polyester polyol, en particulier le polycaprolactone polyol ; les polyéther polyols, en particulier le polytétraméthylène éther glycol (PTMEG), le polypropylène glycol (PPG), le polyéthylène glycol (PEG), le polyhexaméthylène éther glycol, le polycarbonate polyol, le polyéther carbonate polyol, le polybutadiène polyol, le perfluoropolyéther polyol, le silicone polyol ou leurs mélanges.
  7. Chemise de presse (20) selon la revendication 6, caractérisée en ce que l'agent de réticulation contient au plus 65 % en poids du troisième composant.
  8. Chemise de presse (20) selon la revendication 6 ou 7, caractérisée en ce que l'agent de réticulation comporte un quatrième composant comprenant un catalyseur, et le quatrième composant est choisi parmi les amines tertiaires telles que le 1,4-diazabicyclo(2.2.2)octane (DABCO), la triéthylamine, les composés métalliques, les composés organométalliques comprenant ou contenant par exemple du bismuth, tel que du néodécanoate de bismuth, du mercure, de l'aluminium, du zirconium, du fer, du calcium, du sodium, du potassium, du plomb, de l'étain, du titane et des mélanges des substances susmentionnées.
  9. Chemise de presse (20) selon la revendication 8, caractérisée en ce que l'agent de réticulation contient au plus 5 % en poids du quatrième composant.
  10. Chemise de presse (20) selon l'une des revendications 1 à 9, caractérisée en ce que l'au moins une couche de polymère est la couche de polymère radialement la plus externe de la chemise de presse (20) .
  11. Chemise de presse (20) selon l'une des revendications 1 à 10, caractérisée en ce qu'une structure de renforcement (20") est noyée dans l'au moins une couche de polymère.
  12. Chemise de presse (20) selon l'une des revendications 1 à 11, caractérisée en ce que le polyol du prépolymère contient un polyéther-polycarbonate polyol, un polycarbonate polyol, un polytétraméthylène éther glycol (PTMEG) ou leurs mélanges.
  13. Rouleau de presse à sabot (12) destiné à une presse à sabot (10) destinée à traiter une bande de matière fibreuse (24), caractérisé en ce que le rouleau de presse à sabot (12) comporte au moins une chemise de presse (20) selon l'une des revendications précédentes.
  14. Presse à sabot (10) destinée à traiter une bande de matière fibreuse (24), de préférence une bande de papier, de carton, de tissu ou de cellulose, et comprenant un rouleau de presse à sabot (12) et un rouleau antagoniste (14) qui forment ou délimitent conjointement une emprise (22), le rouleau de presse à sabot comprenant une chemise de presse périphérique, caractérisé en ce que la chemise de presse (20) est conçue selon l'une des revendications 1 à 12.
  15. Procédé de fabrication d'une chemise de presse (20) se présentant sous la forme d'une bande sans fin ou d'un tuyau sans fin destiné(e) à un rouleau de presse à sabot (12), de préférence selon l'une des revendications 1 à 12, le procédé comprenant les étapes suivantes :
    a) fournir au moins un mandrin d'enroulement monté de manière rotative (4);
    b) fournir un agent de réticulation comprenant au moins deux composants, à savoir un premier composant comprenant au moins une diamine et un deuxième composant du groupe des esters d'acide carbonique ;
    c) fournir un produit de réaction du 1,4-phénylène diisocyanate (PPDI) et d'au moins un polyol se présentant par exemple sous la forme d'un prépolymère ;
    d) mélanger le produit de réaction et l'agent de réticulation pour produire un polyuréthane ;
    e) appliquer le mélange produit de réaction-agent de réticulation sur une surface du mandrin d'enroulement (4) pour former au moins une couche de polymère (2) de la chemise de presse (20) ;
    f) durcir l'au moins une couche de polymère (2) ;
    g) retirer la chemise de presse (1) ainsi produite du mandrin d'enroulement (4), une structure de renforcement étant introduite dans le mélange produit réactionnel-agent de réticulation de préférence avant ou après l'étape e).
  16. Utilisation d'une chemise de presse (20) selon l'une des revendications 1 à 12 destinée à une presse à sabot (10) pour traiter une bande de matière fibreuse (24), de préférence une bande de papier, de carton, de tissu ou de cellulose.
EP18731420.8A 2017-07-06 2018-06-13 Manchon de presse et son utilisation ainsi que procédé de fabrication dudit manchon de presse Active EP3649287B1 (fr)

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WO2022238037A1 (fr) * 2021-05-12 2022-11-17 Voith Patent Gmbh Revêtement de cylindre et cylindre
DE102021119361A1 (de) 2021-07-27 2023-02-02 Voith Patent Gmbh Pressmantel für eine Schuhpresse bzw. Transportband mit verbesserten Eigenschaften
EP4202116A1 (fr) 2021-12-21 2023-06-28 Voith Patent GmbH Gaine de compression pour une presse à sabot ou une bande transporteuse à des propriétés améliorées à la rupture et aux craquelures

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JPS5762284A (en) 1980-10-01 1982-04-15 Sumitomo Chem Co Ltd Stabilizing method
JP4516610B2 (ja) * 2008-02-08 2010-08-04 イチカワ株式会社 シュープレス用ベルト
DE102011079894A1 (de) * 2011-07-27 2013-01-31 Voith Patent Gmbh Pressmantel für eine Schuhpresse bzw. Transportband auf Basis von aus MDI-Polycarbonat-Prepolymer gebildetem vernetztem Polyurethan
JP3201639U (ja) * 2012-12-07 2015-12-24 ボイス パテント ゲーエムベーハーＶｏｉｔｈ Ｐａｔｅｎｔ ＧｍｂＨ プレスローラ用のプレスジャケット
WO2015086555A1 (fr) * 2013-12-13 2015-06-18 Voith Patent Gmbh Bande de presse et son utilisation ainsi que rouleau presseur et presse à sabot
DE102016201344A1 (de) * 2016-01-29 2017-08-03 Voith Patent Gmbh Pressmantel und Verfahren zur Herstellung eines solchen

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EP3649287A1 (fr) 2020-05-13
US20200291576A1 (en) 2020-09-17
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DE102017115084A1 (de) 2019-01-10
JP2020525669A (ja) 2020-08-27
CN110869556B (zh) 2022-02-08
WO2019007650A1 (fr) 2019-01-10

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