EP2594691B1 - Procédé de fabrication d'une toile pour machine à papier et toile pour machine à papier - Google Patents

Procédé de fabrication d'une toile pour machine à papier et toile pour machine à papier Download PDF

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Publication number
EP2594691B1
EP2594691B1 EP20110189294 EP11189294A EP2594691B1 EP 2594691 B1 EP2594691 B1 EP 2594691B1 EP 20110189294 EP20110189294 EP 20110189294 EP 11189294 A EP11189294 A EP 11189294A EP 2594691 B1 EP2594691 B1 EP 2594691B1
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EP
European Patent Office
Prior art keywords
layer
polymer
paper machine
fabric
carrier layer
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Not-in-force
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EP20110189294
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German (de)
English (en)
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EP2594691A1 (fr
Inventor
Walter Dr. Best
Kai Dr. Klopp
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Heimbach GmbH and Co KG
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Heimbach GmbH and Co KG
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Priority to EP20110189294 priority Critical patent/EP2594691B1/fr
Priority to CN2012104649604A priority patent/CN103112205A/zh
Publication of EP2594691A1 publication Critical patent/EP2594691A1/fr
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Publication of EP2594691B1 publication Critical patent/EP2594691B1/fr
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/0027—Screen-cloths
    • D21F1/0054—Seams thereof
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/08—Felts
    • D21F7/083—Multi-layer felts

Definitions

  • the present invention relates to a method for producing a covering for a paper machine, in particular in the form of a Formiersiebes or a fabric for the press section of the paper machine, with a single- or multi-layer support layer and at least one side applied thereto porous polymer layer, and a papermachine fabric according to produced by such a method.
  • Paper machine clothing serves to form the paper webs on a paper machine, then to dewater mechanically and to further ensure the heat transfer to the drying cylinder.
  • the fabric must support the still fragile paper web when passing through the paper webs through the paper machine and ensure the most possible draft-free run.
  • the stock is sprayed through the headbox onto a sieve or between two sieves.
  • the aggregates of the Formier Anlagens withdraw water from the pulp continuously and increase the solids content to about 20%.
  • the one or even both paper surfaces come into close contact with the forming fabric, so that the fabric surface structure of the forming fabric on the adjacent surface of the paper webs can print, resulting in undesirable marking patterns on the paper surface.
  • paper machine clothing with the finest possible and structurally poor surfaces are desirable in order to minimize the above-described marking effects or to bring them to a level that they do not interfere at least during printing.
  • fillers are added to the pulp to recover whiteness and to adjust the specification, which tend to be flushed out as the water is removed.
  • the sieve meshes of conventional forming fabrics are comparatively coarse in relation to the diameters of the aforementioned filler particles, so that they can be washed away by the adjacent fabric, unless a fiber cake has built up by the mechanical retention of the forming fabric, which can retain these fillers. But even for the production of a good fiber cake fine Siebmaschen to form the initial fiber layer as the starting layer for the fiber cake are required.
  • press felts consist of a plastic carrier, which is occupied on one or both sides with at least one synthetic fiber fleece layer of the same or different fiber fineness.
  • the fibers are supplied in a Benadelungsrea as a nonwoven fabric needle machine and needled with needled needles in the structure of the plastic carrier.
  • the quality and structure of the needled nonwoven in particular its uniformity, also has an effect on the quality of the dewatering and the quality of the paper obtained.
  • scarcity of the needled press felt surface deteriorates the surface of the paper webs.
  • the loss of fibers due to wear and breakage can lead to problems, since these fibers can later find themselves in the paper web.
  • a method for coating a carrier web with a polymer layer is described.
  • a particulate polymeric resin material, a binder and a solvent are homogenized and knife-coated onto the carrier web.
  • the polymeric resin particles are made of polyethylene, polyurethane, especially polyether and polyester polyurethanes.
  • the binders are polyamides or polyamide resins, water being used as the solvent. After application of the above mixture, the water is evaporated again in a subsequent process step, whereby a provided with a polymer foam paper machine clothing is obtained.
  • the press felt has a single-layer or multi-layer base layer which is provided with a plastic, fiber-reinforced resin matrix layer.
  • This matrix layer comprises a polymer resin and uniformly distributed textile fibers and air channels as well as cavities.
  • the resin matrix consists for example of polyurethane polymers or polyvinyl chloride polymers and has thermoplastic properties.
  • the synthetic polymer layer contains, inter alia, polyolefins, polyurethanes, in particular polyether and polyester polyurethanes, and a polyamide- or polyimide-based binder resin.
  • polyolefins polyurethanes, in particular polyether and polyester polyurethanes
  • polyamide- or polyimide-based binder resin a polyamide- or polyimide-based binder resin.
  • the aforementioned paper machine clothing does not meet the requirements in all respects.
  • the applied polymer layers for some applications have too small a pore volume, which adversely affects the water absorbency.
  • the proportion of open pores is not always available at the desired height, but only such pores can absorb moisture from outside and drain the water through the structure.
  • the object of the present invention was therefore to provide an improved manufacturing process, with which papermachine clothing with a larger available pore volume, a higher proportion of open pores and an increased permeability are available.
  • the paper machine clothing should also meet the high mechanical requirements in terms of flexibility and elasticity, especially in terms of elastic recovery after compression and wear resistance.
  • the object is achieved by a method for producing a covering for a paper machine, in particular in the form of a forming fabric or a clothing for the press section of the paper machine, with a single or multilayer carrier layer and a porous polymer layer applied thereto at least on one side, whereby the method is characterized characterized in that a solution of the polymer in an ionic liquid on the carrier layer applied as far as possible over the entire surface and then the polymer is brought to coagulation, wherein the porous polymer layer is formed on the carrier layer.
  • a paper machine clothing in particular in the form of a forming fabric or a press fabric, can be produced, with which paper of high quality can be produced. Because of the irregularly configured surface of the papermachine fabric which can be produced according to the invention, it is not possible, for example in the forming section, to impress regularly recurring patterns as in the case of woven forming fabric surfaces.
  • the highly pronounced porosity of the polymer layer of the papermachine fabric can be produced according to the invention allows a high water absorption, so that when passing the wet paper webs with a press fabric according to the invention through the press nip a significant increase in the solids content of the paper web is possible. Even in the construction of the press pressure, the pores are hardly closed, so that a high degree of permeability is ensured even under these conditions. This is attributed to the formation of statistically distributed dewatering channels in the micrometer range in the polymer layer applied according to the invention, which distinguishes them from the hitherto known polymer layers, which were produced, for example, by sintering processes.
  • Another advantage of this invention covering is that they usually lose no fibers during wear, which can be stored in the paper web.
  • the paper machine clothing according to the invention exhibits pronounced elasticity. This has an advantageous effect, in particular when used as a press fabric, since such paper machine clothing is constantly subjected to high compressive stress when passing through the press nip, and insofar a good resilience for a constant press output is desirable.
  • the polymers used for the process according to the invention or the papermachine clothing according to the invention preferably have thermoplastic properties. They may in particular be selected from the group comprising polyamides, such as polyamide 6, polyamide 6.6, polyamide 6.10, polyethylene terephthalate, polybutylene terephthalate, polyurethanes, especially polyester-polyurethanes or Polyether polyurethanes, polyvinyl chloride or combinations or copolymers thereof.
  • polyamides such as polyamide 6, polyamide 6.6, polyamide 6.10, polyethylene terephthalate, polybutylene terephthalate, polyurethanes, especially polyester-polyurethanes or Polyether polyurethanes, polyvinyl chloride or combinations or copolymers thereof.
  • polyamides such as polyamide 6, polyamide 6.6, polyamide 6.10, polyethylene terephthalate, polybutylene terephthalate, polyurethanes, especially polyester-polyurethanes or Polyether polyurethanes,
  • the polymer concentration in the polymer solution used can also be varied over wide ranges. In this way, for example, the desired application viscosity of the solution can be adjusted, which in turn is closely related to the molecular weight of the polymers used as well as the temperature of the polymer solution.
  • the polymer concentration may be, for example, 5 to 95% by weight, based on the weight of the total solution, in particular 50 to 80% by weight.
  • the concentration of the polymer solution can be adjusted to the desired result with a few experiments.
  • the application viscosity that is to say the viscosity of the polymer solution at the respective application temperature, is advantageously in the range from 100 to 100,000 mPas, in particular from 1000 to 50,000 mPas.
  • Ionic liquids are a group of solvents which, unlike traditional organic or aqueous solvents, are composed of anions and cations.
  • ionic liquids are typically composed of an organic cation, which is often obtained by alkylation of a compound.
  • These may be selected from imidazoles, pyrazoles, thiazoles, isothiazoles, azathiazoles, oxothiazoles, oxazines, oxazolines, oxazaboroles, dithiozoles, triazoles, selenozoles, oxaphospholes, pyrroles, borols, furans, thiophenes, phospholes, pentazoles, indoles, indolines, oxazoles, isoxazoles , Isotriazoles, tetrazoles, benzofurans, dibenzofurans, benzothiophenes, dibenzothiophenes, thiadiazoles, pyridines, pyrimidines, pyrazines, pyridazines, piperazines, piperidines, morpholones, pyrans, anolines, phthalazines, quinazolines, quinoxalines, and combinations thereof.
  • the anionic portion of the ionic liquid may be composed of inorganic or organic anions. Typical examples of these are halides, BX 4 - , PF 6 - , AsF 6 - , SbF 6 - , NO 2 - , NO 3 - , SO 4 2- , BR 4 - , substituted or unsubstituted carboranes, substituted or unsubstituted metallocarboranes, phosphates , Phosphites, polyoxometalates, substituted or unsubstituted carboxylates such as acetate, triflates and non-coordinating anions.
  • halides BX 4 - , PF 6 - , AsF 6 - , SbF 6 - , NO 2 - , NO 3 - , SO 4 2- , BR 4 - , substituted or unsubstituted carboranes, substituted or unsubstituted metallocarboranes, phosphate
  • X independently of one another can stand for fluoride, chloride, bromide or iodide and R independently of one another Hydrogen, alkyl, substituted alkyl, cycloalkyl, substituted cycloalkyl, heteroalkyl, heterocycloalkyl, substituted heterocycloalkyl, aryl, substituted aryl, heteroaryl, substituted heteroaryl, alkoxy-aryloxy, acyl, silyl, boryl, phosphino, amino, thio or seleno.
  • the polymer solution used for the process according to the invention can be prepared, for example, by introducing the polymer as polymer granulate into the ionic liquid at a suitable temperature with stirring.
  • the polymer can be converted by heating into a polymer melt, in which then subsequently the ionic liquid is introduced.
  • the polymer solution may contain a filler and / or pore former which is in particular selected from the group comprising micro- and nanoparticles or fibers, preferably plastic or glass (hollow) balls, ceramic (hollow) balls, plastic Glass, carbon, metal or ceramic fibers, phyllosilicates or combinations thereof.
  • Suitable pore formers are, for example, salts, in particular salts free of water of crystallization, such as sodium chloride.
  • the pore formers can be dissolved out after the production of the fabric.
  • the pore formers are expediently so on the coagulant agreed that they dissolve in it.
  • a sodium chloride pore-forming agent is in particular water as a coagulant in question.
  • fillers it is possible, for example, to modify the mechanical properties of the porous polymer layer, such as their tensile strength and elasticity.
  • the wear resistance of the fabric can be increased by the use of fillers.
  • the specific weight can be reduced, for example, by using lightweight fillers. Light fillers are understood as meaning those fillers whose specific weight is less than one gram per cm 3 .
  • the carrier layer used in the context of the method according to the invention or the papermachine fabric according to the invention can, in principle, have any shape and structure known for papermachine clothing.
  • the carrier layer may be a woven, knitted fabric, scrim or consolidated nonwoven, in particular fibers, threads or threads, or a netting.
  • the carrier layer can be constructed in one or more layers.
  • an intermediate layer can be provided on at least one side of the carrier layer, to which the polymer solution is applied, wherein the intermediate layer is in particular selected from an anchored nonwoven fabric, a layer of layered and sintered polymer powder or polymer microspheres, a foam layer, a comparison with Carrier layer finer or coarser structured layer of woven, knitted fabric, scrim or bonded nonwoven, in particular of fibers, threads or threads, or of netting or a combination of these.
  • the mechanical properties and the water absorption behavior of the papermachine clothing can be modified.
  • the carrier layer and / or the intermediate layer may comprise or consist of a polymer material which is in particular selected from the group comprising polyamides, in particular aramid, polyesters, polyolefins, polyurethanes, copolymers, mixtures and combinations thereof , wherein the carrier layer and the intermediate layer may each consist of different materials.
  • the polymer solution is heated to a temperature of 10 to 300 ° C prior to application of the polymer solution, in particular to a temperature of 80 to 200 ° C, preferably from 90 to 150 ° C.
  • a temperature of 10 to 300 ° C prior to application of the polymer solution, in particular to a temperature of 80 to 200 ° C, preferably from 90 to 150 ° C.
  • This is particularly advantageous since in this way polymer solutions with comparatively high polymer concentration can be applied uniformly.
  • To apply temperature jumps To avoid it is also advantageous to heat the support layer to the aforementioned temperatures, in particular to at least the same temperature as the polymer solution.
  • the application of the polymer solution can in principle be carried out in any suitable manner, for example by doctoring, brushing, brushing, dipping, spraying, sprinkling, casting, spraying, roller coating, printing, for example by rotary screen printing or inkjet, impregnation or calendering is applied , Also combinations of these are possible.
  • the order may be full-surface or sectionally limited, regular or irregular, in defined or random patterns, punctiform or linear, or in any other pattern.
  • machine components in the form of doctor blades or rollers can be used on one or both sides of the substrate optionally with an existing intermediate layer.
  • the coagulation can be carried out in a single step or in several stages.
  • the applied polymer solution layer may first be lightly sprayed or sprinkled with a coagulant to produce a thin skin on the surface that is less porous. In other words, this makes it possible to produce a particularly smooth surface.
  • the thus pretreated web can be dipped into the coagulant to complete the precipitation process. This preserves the polymer layer inside its highly porous structure.
  • the applied layer thickness of the polymer solution can be varied within wide ranges.
  • the polymer solution can be applied in a layer thickness of 100 to 3000 .mu.m, in particular from 200 to 2500 .mu.m, preferably from 500 to 1500 .mu.m.
  • the applied layer thickness is typically related to the desired layer thickness of the porous polymer layer.
  • the polymer solution at least partially penetrates into the carrier layer and / or the intermediate layer and, in particular, at least partially completely penetrates the latter.
  • the anchoring of the polymer layer on the carrier layer can be improved.
  • the machine side of the papermachine fabric can be provided with a polymer layer in this way, if this completely penetrates the carrier layer.
  • this also the resilience and water absorption capacity can be further increased.
  • the carrier layer can be coated on both sides with a polymer solution of the type mentioned above. This can either take place in one step or else a polymer layer is first produced by application and coagulation and then subsequently the opposite side coated accordingly. Regardless of the type the generation of the two layers is opened by this process variant, the possibility to produce a different polymer coating on both sides, but this is not mandatory.
  • a particularly firm mechanical cohesion of the polymer layers applied on both sides can be generated with one another. In this way, for example, a particularly wear-resistant surface can be produced for the later machine side of the paper machine clothing, whereas the paper side of the clothing can be interpreted as having a particularly high water absorption capacity.
  • the coagulation of the polymer from the polymer solution can be effected, for example, by contacting it with a coagulant selected from protic solvents, in particular with water, a C 1 to C 4 alcohol or mixtures thereof.
  • the job can be done, for example, by brushing, brushing, dipping, spraying, sprinkling, pouring, spraying, printing, impregnating or combinations thereof.
  • the clothing After coagulation of the polymer, it is expedient to dry the clothing. This can be done for example via a freeze-drying. Alternatively, a drying at a temperature of 20 ° C to the boiling point of the coagulant such as 40 to 100 ° C is possible, possibly also under reduced pressure.
  • the layer thickness of the dried porous polymer layer which is outside the support layer or the intermediate layer, 100 to 2000 .mu.m, in particular 200 to 1700 .mu.m, preferably 500 to 1500 .mu.m.
  • these layer thicknesses are particularly advantageous, since such papermachine clothing has good mechanical properties, such as a high mechanical resilience and at the same time have a large water absorption capacity.
  • the porous polymer layer also extends into the carrier layer, the total layer thickness of the porous polymer layer may also be above the above-mentioned values.
  • the paper machine clothing according to the invention can be subjected to a subsequent surface treatment.
  • the porous polymer layer can be mechanically processed, for example after drying, in particular via a grinding process. In this way, particularly smooth surfaces can be produced, so that the risk of the formation of marking patterns is further reduced.
  • by such a surface treatment and the water absorption behavior can be changed later.
  • a skin formation on the porous polymer layer can occur, which can reduce the pore accessibility. This may be desirable in individual cases.
  • the porosity of the porous polymer layer is to be increased, this can be done by the abovementioned mechanical removal.
  • the porous polymer layers which can be produced by means of the process according to the invention have, for example, an average pore size of from 0.1 to 300 ⁇ m, in particular from 0.5 to 200 ⁇ m. Particularly preferably, the average pore size is about 0.5 to 20 microns.
  • the pore volume may be, for example, 30 to 70%, i. H. 30 to 70% of a sample volume is formed by pores.
  • the pore volume is 40 to 60%.
  • the pore volume, the pore size and their distribution can be determined by methods known per se, such as mercury porosimetry or BET measurements.
  • the present invention also relates to a clothing for a paper machine, in particular in the form of a forming fabric or a clothing for the press section of the paper machine, which is produced by the inventive method.
  • the porous polymer layer expediently forms the paper side of the fabric.
  • the porous polymer layer may additionally form the machine side of the fabric.
  • the present invention is further directed to a paper machine equipped with a fabric according to the invention.
  • the present invention relates to the use of a solution of a polymer in an ionic liquid for producing a paper machine clothing, in particular in the form of a forming fabric or a covering for the press section of the paper machine.
  • a two-layer carrier layer in the form of a forming fabric is used.
  • This carrier layer has a paper-side and a machine-side fabric layer, which are interconnected by intrinsic weft threads.
  • the paper-side fabric layer is formed of plain weave interwoven threads, whereas the machine side fabric layer threads are woven in satin weave.
  • the threads of the paper-side fabric layer have a smaller diameter than those of the machine-side fabric layer.
  • the ionic liquid used was 1-ethyl-3-methylimidazolium diethyl phosphate (ENIM DEP from BASF).
  • ENIM DEP 1-ethyl-3-methylimidazolium diethyl phosphate
  • PA6 polymer polyamide 6
  • the ionic liquid was heated to about 80 ° C. The suitable temperature depends on the mixture composition. In the present case, the weight fraction was 40% ENIM DEP to 60% PA6.
  • the solution of the polymer in the ionic liquid was applied to the two-layer support layer by means of a doctor blade with only slight cooling.
  • the viscosity was 700 mPas.
  • a coagulant de-contaminated and deionized water was used, which was previously heated to about 80 ° C.
  • the heating of the coagulant is advantageous so that the mixture of polymer and ionic liquid does not cool. Furthermore, the viscosity of the coagulant decreases and the exchange of coagulant and ionic liquid is accelerated.
  • the coated carrier layer is passed through a bath of the coagulant while the polymer coagulates from the solution to form the porous polymer layer.
  • the residence time of the covering in the bath is chosen as a function of the layer thickness so that the polymer coagulates quantitatively.
  • the fabric is dried at a temperature of 80 ° C.
  • FIGS. 1 to 5 A paper machine clothing produced in this way is in the SEM images according to the FIGS. 1 to 5 shown.
  • Fig. 1 is shown in side sectional view in the form of a scanning electron micrograph.
  • the spongy pore structure with comparatively thin webs and the resulting high porosity of the polymer layer is in FIGS. 2 and 3 clearly visible.
  • FIG. 2 a partial cross section through the polymer layer with coarse drainage channels (white) and thick-walled polymer webs (black).
  • Fig. 3 is another cross-sectional view to see. Thereafter, on one side of the polymer layer, the in Fig. 2 shown coarse drainage channels and thick-walled polymer webs to see, whereas the opposite side has comparatively finer drainage channels (white) and thin-walled polymer webs (black).
  • FIGS. 4 and 5 the paper side of the fabric is shown in plan view.
  • the polymeric material is black and the open areas are white.
  • Fig. 5 shows the inverse representation. This results in an open area of 42% with pore sizes of 1-7 microns.

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Claims (15)

  1. Procédé de fabrication d'un entoilage pour une machine à papier, spécifiquement sous la forme d'une toile de formation ou d'un entoilage pour la section de pressage de la machine à papier, avec une couche de support mono- ou multicouche sur laquelle est posée au moins un côté une couche de polymères, caractérisé en ce que la surface de la couche porteuse est recouverte le plus possible d'une solution du polymère sous la forme d'un liquide ionique, le polymère étant ensuite coagulé pour former une couche de polymères poreuse sur la couche porteuse.
  2. Procédé selon la revendication 1, caractérisé en ce que le polymère est un polymère thermoplastique plus spécifiquement sélectionné parmi le groupe comprenant des polyamides, dont le polyamide 6, le polyamide 6.6, le polyamide 6.10, le polytéréphtalate d'éthylène, le polytéréphtalate de butylène, le polyuréthane, le polyester-polyuréthane, le polyéther-polyuréthane, le chlorure de polyvinyle ou des combinaisons ou copolymères de ceux-ci.
  3. Procédé selon les revendications 1 ou 2, caractérisé en ce que la concentration de polymères dans la solution de polymères est de 5 à 95 %m(i) par rapport au poids total de la solution, plus spécifiquement de 50 à 80 %m(i).
  4. Procédé selon l'une des revendications précédentes, caractérisé en ce que la solution de polymères contient un matériel de remplissage et/ou un agent porogène plus spécifiquement choisi parmi le groupe comprenant des micro- ou nanoparticules ou -fibres, préférablement des billes de plastique ou verre, des billes de céramique ou billes creuses, des fibres de plastique, verre, carbone, métal ou céramique, phyllosilicates, sels ou combinaisons de ces derniers.
  5. Procédé selon l'une des revendications précédentes, caractérisé en ce que la couche porteuse est formée comme un tissu, maille, nappe ou non-tissé consolidé, plus spécifiquement composé de fibres, fil ou retors, ou comme un filet.
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'au moins un côté de la couche porteuse est pourvu d'une couche intermédiaire sur laquelle est appliquée la solution de polymère, la couche intermédiaire étant spécialement sélectionnée parmi un non-tissé ancré, une couche en poudre de polymères stratifié et vitrifié ou de microbilles de polymères, une couche de mousse synthétique, une couche de tissu, maille, nappe ou non-tissé consolidé structurée plus finement ou plus grossièrement en comparaison avec la couche porteuse, spécifiquement composée de fibres, fils ou retors, ou de filet, ou encore d'une combinaison de ces derniers.
  7. Procédé selon l'une des revendications précédentes, caractérisé en ce que la solution de polymères et, éventuellement, la couche porteuse, sont chauffées à une température de 10 à 300°C avant l'application de la couche de polymère, plus spécifiquement à une température de 80 à 200°C, préférablement de 90 à 150°C et/ou que la solution de polymères est appliquée en une couche de 100 à 2000 µm, plus spécifiquement de 200 à 2500 µm, préférablement de 500 à 1500 µm.
  8. Procédé selon l'une des revendications précédentes, caractérisé en ce que la solution de polymères s'infiltre au moins partiellement dans la couche porteuse et/ou la couche intermédiaire et, plus spécifiquement, la traverse complètement au moins en partie.
  9. Procédé selon l'une des revendications précédentes, caractérisé en ce que la coagulation du polymère est effectuée en mettant en contact la solution de polymères appliquée avec un agent de coagulation sélectionné parmi des solvants protiques comme l'eau ou un alcool C1 à C4, plus spécifiquement par badigeonnage, balayage, immersion, pulvérisation, irrigation, coulage, arrosage, pressage, imprégnation ou combinaison de ces derniers et/ou que l'étape de coagulation est suivie d'une étape de séchage, le séchage étant effectué par lyophilisation ou à une température de 20°C jusqu'au point d'ébullition de l'agent de coagulation, plus spécifiquement entre 40 et 100°C, au besoin sous une pression réduite.
  10. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'épaisseur de la couche de polymères poreuse sèche, qui se trouve à l'extérieur de la couche porteuse, voire de la couche intermédiaire, est de 100 à 2000 µm, plus spécifiquement entre 200 à 1700 µm, préférablement entre 500 et 1500 µm.
  11. Procédé selon l'une des revendications précédentes, caractérisé en ce que la couche de polymères poreuse est traitée mécaniquement après le séchage, préférablement par frottement.
  12. Procédé selon l'une des revendications précédentes, caractérisé en ce que la taille moyenne des pores dans la couche de polymères est de 0,1 à 300 µm, plus spécifiquement entre 0,5 et 200 µm, préférablement entre 0,5 et 20 µm et/ou que le volume des pores dans la couche de polymères est de 30 à 70 %, plus spécifiquement de 40 à 60 %.
  13. Entoilage pour une machine à papier, spécifiquement sous la forme d'une toile de formation ou d'un entoilage pour la section de pressage de la machine à papier, fabriqué selon un procédé d'après les revendications 1 à 18.
  14. Entoilage selon la revendication 13, caractérisé en ce que la couche de polymères poreuse forme le côté papier et/ou le côté machine de l'entoilage.
  15. Machine à papier équipée d'un entoilage selon l'une des revendications 13 à 14.
EP20110189294 2011-11-16 2011-11-16 Procédé de fabrication d'une toile pour machine à papier et toile pour machine à papier Not-in-force EP2594691B1 (fr)

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Application Number Priority Date Filing Date Title
EP20110189294 EP2594691B1 (fr) 2011-11-16 2011-11-16 Procédé de fabrication d'une toile pour machine à papier et toile pour machine à papier
CN2012104649604A CN103112205A (zh) 2011-11-16 2012-11-16 用于制备造纸机网毯的方法以及造纸机网毯

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EP20110189294 EP2594691B1 (fr) 2011-11-16 2011-11-16 Procédé de fabrication d'une toile pour machine à papier et toile pour machine à papier

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EP2594691A1 EP2594691A1 (fr) 2013-05-22
EP2594691B1 true EP2594691B1 (fr) 2014-01-08

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DE202013103055U1 (de) * 2013-07-10 2014-10-13 Heimbach Gmbh & Co. Kg Papiermaschinenband
CN106460332A (zh) * 2016-03-23 2017-02-22 许长云 一种经线自绑定成形网
CN106283818B (zh) * 2016-08-24 2018-03-23 四川环龙技术织物有限公司 一种造纸机网毯及用于生产该造纸机网毯的工艺
CN106245403B (zh) * 2016-08-24 2018-02-16 四川环龙技术织物有限公司 一种复合纤维聚酯多层造纸网结构

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US4571359A (en) 1984-12-18 1986-02-18 Albany International Corp. Papermakers wet-press felt and method of manufacture
US4795480A (en) 1986-12-10 1989-01-03 Albany International Corp. Papermakers felt with a resin matrix surface
US4847116A (en) 1988-05-09 1989-07-11 Albany International Corp. Method for depositing particles and a binder system on a base fabric
GB9803172D0 (en) * 1998-02-14 1998-04-08 Scapa Group Plc Porous belts
TW538175B (en) * 1999-07-08 2003-06-21 Heimbach Gmbh Thomas Josef Transfer belt for a paper making machine
US7156956B2 (en) * 2003-08-11 2007-01-02 Albany International Corp. Paper industry process belt with a surface structure composed of a porous membrane
JP2006176904A (ja) * 2004-12-21 2006-07-06 Ichikawa Co Ltd 抄紙搬送フェルトおよび該抄紙搬送フェルトを備えた抄紙機のプレス装置

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