WO2006035549A1 - Feutre de transport de papier, appareil de presse de machine à papier munie du feutre de transport de papier - Google Patents

Feutre de transport de papier, appareil de presse de machine à papier munie du feutre de transport de papier Download PDF

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Publication number
WO2006035549A1
WO2006035549A1 PCT/JP2005/014368 JP2005014368W WO2006035549A1 WO 2006035549 A1 WO2006035549 A1 WO 2006035549A1 JP 2005014368 W JP2005014368 W JP 2005014368W WO 2006035549 A1 WO2006035549 A1 WO 2006035549A1
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WO
WIPO (PCT)
Prior art keywords
paper
press
wet paper
fibers
press apparatus
Prior art date
Application number
PCT/JP2005/014368
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English (en)
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WO2006035549A8 (fr
Inventor
Yasuhiko Kobayashi
Takashi Ouchi
Original Assignee
Ichikawa Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ichikawa Co., Ltd. filed Critical Ichikawa Co., Ltd.
Priority to EP05768671A priority Critical patent/EP1799904A1/fr
Priority to US11/662,261 priority patent/US20070240844A1/en
Publication of WO2006035549A1 publication Critical patent/WO2006035549A1/fr
Publication of WO2006035549A8 publication Critical patent/WO2006035549A8/fr

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Classifications

    • 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

  • PAPER TRANSPORTING FELT AND PRESS APPARATUS OF PAPER MACHINE HAVING THE PAPER TRANSPORTING FELT
  • the present invention relates to a paper transporting felt and a press apparatus of a paper machine having the paper transporting felt, and more particularly to a paper transporting felt for use in a press mechanism having a shoe press and a press apparatus of a shoe press type paper machine having the paper transporting felt.
  • a paper machine has a wire part, a press part, and a drier part.
  • the wire part, the press part, and the drier part are disposed in that order of arrangement along a transporting direction of a wet paper.
  • the wet paper is transported while being consecutively delivered to paper transporting tools disposed respectively in the wire part, the press part, and the drier part, and has its water squeezed out (i.e., dewatered) , and is finally dried in the drier part.
  • a press apparatus disposed in the press part has a plurality of press mechanisms disposed in series along the transporting direction of the wet paper.
  • Each press mechanism has a pair of endless belt-shaped paper transporting felts as well as a pair of rolls (i.e., a roll press) or a roll and a shoe (i.e., a shoe press) which serve as a press disposed in such a manner as to vertically oppose each other to nip respective portions of the paper transporting felts therebetween.
  • a pair of rolls i.e., a roll press
  • a shoe i.e., a shoe press
  • such paper machines include a roll press type paper machine in which a press apparatus for nipping and pressurizing portions of the paper transporting felts sandwiching the wet paper by means of the pair of rolls is provided in the press part, a shoe press type paper machine in which a press apparatus for nipping and pressurizing portions of the paper transporting felts sandwiching the wet paper by means of the roll and the shoe is provided in the press part, and so on.
  • the press zone of a pressing portion i.e., a nip formed by the roll and the shoe
  • the dewatering characteristic excels further.
  • the wet paper needs to be delivered to a paper transporting tool (e.g., a drier canvas) of an ensuing process between the wire part and the press part, between press mechanisms such as a first press area and a second press area of the press apparatus, and between the press part and the drier part.
  • a paper transporting tool e.g., a drier canvas
  • press mechanisms such as a first press area and a second press area of the press apparatus
  • the press part and the drier part e.g., a drier canvas
  • a paper transporting felt in the press apparatus not only a wet paper dewatering function and a wet paper transporting function but also a paper releasing function for allowing the wet paper to be smoothly released from the paper transporting felt at the time of delivering the wet paper to the ensuing process (i.e., for facilitating the release of the wet paper from the paper transporting felt) is required.
  • a smoothing function for smoothing the wet paper surface
  • the paper transporting felt adapted to prevent the re-wetting phenomenon of the paper transporting felt and blowing and the like at the time of pressing, one is known which is impregnated with emulsion resin and in which some contrivance is made in the wet paper side portion (refer to USP 4,500,588.). More specifically, in the paper transporting felt, a batt layer formed on the surface of a base layer is impregnated with emulsion resin, and the wet paper side surface of the batt layer is calendered such that the wet paper side surface of the batt layer becomes a dense and chamois-like smooth surface, thereby forming a barrier layer.
  • a coarse-fibered layer formed on the surface of the base layer is impregnated with emulsion resin, a barrier layer (a nonwoven fabric layer) is provided on the coarse- fibered layer, and a fine fibered-layer is formed on the barrier layer (the nonwoven fabric layer) .
  • the arrangement provided is such that the emulsion resin is prevented from penetrating up to the wet paper side surface of the paper transporting felt by the barrier layer. Therefore, the re-wetting and blowing of the paper transporting felt are prevented, thereby making it possible to increase the papermaking speed.
  • either one material of a high polymer elastic member having a wet paper placing surface and a surface-layer forming material disposed in the high polymer elastic member is made hydrophobic, and portions for repelling water and portions for condensing water are thus provided on the wet paper placing surface in a dispersed manner so as to break water films formed between the wet paper placing surface and the wet paper. An attempt is thereby made to improve the paper releasing function.
  • a paper transporting felt is also known in which a fibrous material is caused to project from the wet paper side surface of the paper transporting felt so as break water films formed between the wet paper side surface and the wet paper, thereby making an attempt to improve the paper releasing function (refer to JP-A-2004- 124274.) .
  • this paper transporting felt consists of a substrate, machine side layer, and a wet paper side layer having a high polymer elastic portion such as urethane resin, and as the surface of the high polymer elastic portion is subjected to processing such as polishing, portions of a fibrous material mixed in the high polymer elastic portion are made to project from the wet paper side surface.
  • the falling off and cutting off of fibers (the so-called loss of fibers) on the surface of the batt layer of the paper transporting felt which comes into direct contact with the wet paper occur noticeably due to the very large pressure or friction at the pressing portion (i.e., the nip) .
  • Most of the falien-off fibers and the cut-off fibers are discharged to the outside of the press apparatus by a cleaning means consisting of a water shower, a suction box, and the like. However, there are cases where slight portions of them are attached to the surface of the wet paper.
  • the paper which has been manufactured with such fibers attached to its surface is inferior in printability in some cases (more specifically, decoloration or the like can occur when printing is effected) .
  • the loss of fibers on the batt layer surface of the paper transporting felt which comes into direct contact with the wet paper deteriorates the quality of paper products such as printed matter.
  • the surface of the batt layer constitutes a factor causing the surface smoothness of the wet paper to decline noticeably since the surface becomes coarse due to the loss of fibers.
  • Fiber masses i.e., masses of fibers
  • fiber masses are likely to be produced if the monofilaments are carded in a preliminary stage of a needling process (carding is present in the preliminary stage of the needling process, and the fibrous paper sheet after the carding is implanted by needling) , which is one of the processes for manufacturing the paper transporting felt.
  • These fiber masses are implanted in the felt in the needling immediately after the carding, and relatively large irregularities are formed on the surface of the paper transporting felt, so that the surface smoothness of the wet paper undesirably declines.
  • this paper transporting felt is inferior in the wet paper dewatering performance and the paper releasing performance, this paper transporting felt is unsuitable for the press apparatus of a paper machine in which the wet paper dewatering function and a high paper releasing function are required for the paper transporting felt.
  • thin water films are likely to be formed between the smooth wet paper side surface and the wet paper, and the water films act like an adhesive, so that there is a high possibility that the wet paper adheres to the wet paper side surface.
  • the paper transporting felt which is disclosed in USP 4,500,588 and in which a nonwoven fabric layer is interposed between the coarse-fibered layer on the base layer side and the fine-fibered layer on the wet paper side capable of including fiber masses is also unsuitable for the press apparatus of a paper machine in which the wet paper dewatering function and a high smoothing function are required for the paper transporting felt.
  • An object of the invention is to provide a paper transporting felt in which stains can be easily removed, an excellent paper releasing function at the time of delivery of the wet paper is performed, and the function of smoothing the wet paper surface is enhanced, as well as a press apparatus of a paper machine having the paper transporting felt.
  • the invention provides a paper transporting felt which is at least one paper transporting felt of a pair of paper transporting felts for a shoe press, which are disposed in a press apparatus provided in a press part of a paper machine, form a press mechanism together with a shoe press having a roll and a shoe in the press apparatus, and are pressurized by the roll and the shoe while sandwiching a wet paper, to absorb water squeezed from the wet paper, having: a base layer; a first batt layer which is formed on a wet paper side surface of the base layer; a second batt layer which is formed on a press side surface of the base layer; a wet paper contacting fibrous layer which includes a plurality of split fibers split into fine fibers and a high polymer elastic material impregnating gaps between the fine fibers, and is formed on a wet paper side surface of the first batt layer so as to allow the fine fibers and the high polymer elastic material to come into direct contact with the wet paper; and a hydrophilic nonwoven
  • the wet paper contacting fibrous layer contains 1 wt.% to 10 wt.% of the high polymer elastic material.
  • fibers for forming the wet paper contacting fibrous layer contains 15 wt.% to 100 wt.% of the split fibers and nonsplit fibers as remains.
  • each size of the split fibers prior to splitting is 3.3 dtex or smaller. In the paper transporting felt, each size of the split fibers prior to splitting is 1.9 dtex.
  • the invention also provides a press apparatus of a paper machine having the paper transporting felt.
  • the invention also provides a press apparatus of a paper machine having a plurality of press mechanisms each having the paper transporting felt, wherein the plurality of press mechanisms are disposed in series along a transporting direction of the wet paper being transported by the paper transporting felts.
  • each size of the split fibers prior to splitting is 3.3 dtex or smaller.
  • each size of the split fibers prior to splitting is 1.9 dtex.
  • the press apparatus of a paper machine is a press machine of a closed draw type.
  • the press apparatus is a press apparatus of a shoe press type paper machine, and a press of the press apparatus is a shoe press having a roll and a shoe for pressurizing the paper. transporting felt.
  • the press apparatus is a press apparatus of a roll press type paper machine, and a press of the press apparatus is a roll press having a pair of rolls for pressurizing the paper transporting felt.
  • the wet paper contacting fibrous layer which has been formed by splitting the plurality of split fibers into fine fibers and by subsequently impregnating gaps between the fine fibers with the high polymer elastic material, is formed on the wet paper side surface of the first batt layer of the paper transporting felt so as to be brought into direct contact with the wet paper. Therefore, it is possible to improve the surface smoothness of the wet paper contacting fibrous layer, thereby making it possible to manufacture high-quality paper having a smooth surface.
  • the surface of the wet paper contacting fibrous layer is formed as a surface in which the fine fibers formed by the splitting of the split fibers are partially covered with the high polymer elastic material.
  • the surface of the wet paper contacting fibrous layer has slight irregularities caused by the projection of these infinitesimal fine fibers, water films between the wet paper contacting fibrous layer and the wet paper are likely to be broken or are difficult to be formed.
  • the paper releasability from the paper transporting felt is excellent, so that the wet paper can be easily delivered to the drier canvas in the ensuing process.
  • the fine fibers formed by the splitting of the split fibers are combined to some extent and are partially covered by the high polymer elastic material, the so-called capillary phenomenon is difficult to occur, and the falling off of these fine fibers from the paper transporting felt is prevented. Consequently, as for the paper manufactured by the paper machine using the paper transporting felts, its surface becomes extremely smooth. Moreover, since the life of the paper transporting felt (i.e., the usable period of the paper transporting felt) is long, it is possible to decrease the frequency of maintenance for replacing the paper transporting felt with a new one.
  • the hydrophilic nonwoven fabric layer is disposed between the first batt layer and the wet paper contacting fibrous layer, the high polymer elastic material with which the wet paper contacting fibrous layer is impregnated from its surface side is blocked by the hydrophilic nonwoven fabric layer, and layers deeper than the hydrophilic nonwoven fabric layer
  • the high polymer elastic material is disposed only in the wet paper contacting fibrous layer (e.g., by 0.5 mm or thereabouts from the surface) .
  • the paper transporting felt since the paper transporting felt has water permeability and appropriate compressing and recovering functions (cushionability) , the paper transporting felt is able to exhibit its dewatering characteristic effectively.
  • stains specifically, components of such as additives and paste contained in the wet paper W
  • the paper transporting felt has a high self-cleaning function.
  • wet paper contacting fibrous layer of the paper transporting felt in accordance with the invention is formed such that after the split fibers of the wet paper contacting fibrous layer are split into fine fibers, the gaps between these fine fibers are impregnated with the high polymer elastic material.
  • the splitting of the split fibers is preferably effected in the needling process which if one of the processes of manufacturing the paper transporting felt. Fiber masses
  • split fibers are likely to be produced if the split fibers are split into fine fibers by carding in a preliminary stage of a needling process. These fiber masses are implanted by needling, and relatively large irregularities are formed on the surface of the paper transporting felt, so that the surface smoothness of the wet paper declines.
  • the splitting of the split fibers may be effected, for instance, by needling using small- gauge needles in the needling process, by rubbing the implanted split fibers with a brush (commonly called a teasel) of a raising machine after the needling process, or by refining (hot water rinsing) the paper transporting felt after the needling process.
  • the splitting of the split fibers may be effected in any process insofar as the process is carried out after carding, which is the preliminary stage of the needling process, and before the impregnation with the high polymer elastic material. Then, after the splitting of the split fibers into fine fibers, the gaps between the fine fibers are impregnated with the high polymer elastic material.
  • the impregnation with the high polymer elastic material is performed as follows: After the plurality of split fibers are split into fine fibers, a synthetic resin such as water-based urethane resin, water-based acrylic resin, water-based epoxy resin, water-based synthetic rubber (i.e., water-based emulsion resin), or the like is applied with a roller or sprayed with a sprayer at ordinary temperature to impregnate the gaps between the fine fibers, and is subsequently cured on heating.
  • a synthetic resin such as water-based urethane resin, water-based acrylic resin, water-based epoxy resin, water-based synthetic rubber (i.e., water-based emulsion resin), or the like is applied with a roller or sprayed with a sprayer at ordinary temperature to impregnate the gaps between the fine fibers, and is subsequently cured on heating.
  • the wet paper contacting fibrous layer contains 1 wt.% to 10 wt.% of the high polymer elastic material, not all the pores between the fibers are filled with the high polymer elastic material, and appropriate porosity is maintained between the fibers. In other words, the structure is made porous. Therefore, water films formed between the wet paper contacting fibrous layer and the wet paper are dispersed, and appropriate cushionability is provided. Consequently, it is possible to obtain a paper transporting felt the paper releasability from which is excellent, which absorbs water squeezed from the wet paper by stretching by being pressurized by the press in each press mechanism, and which has a smooth surface.
  • the paper transporting felts can be provided with optimal characteristics (paper releasability, surface smoothing characteristic, dewatering characteristic, etc.) for the respective press mechanisms. It should be noted that the reason the ratio of the high polymer elastic material for impregnation is set to 1 wt.% or greater is that if the ratio of the high polymer elastic material is less than 1 wt.%, it is practically impossible to expect for the effect of the high polymer elastic material.
  • the reason the ratio of the high polymer elastic material for impregnation is set to 10 wt.% or smaller is that if the ratio of the high polymer elastic material is more than 10 wt.%, the cushionability and the water permeability of the paper transporting felt are lost, causing a decline in the wet paper dewatering characteristic.
  • the paper transporting felt since fibers for forming the wet paper contacting fibrous layer contain 15 wt.% to 100 wt.% of the split fibers and the nonsplit fibers as remains, the wet paper contacting fibrous layer may be formed by the split fibers.
  • the weight ratio of mix spun fibers is defined by "weight of the split fibers 15A / (weight of the split fibers 15A + weight of the nonsplit fibers) x 100.”
  • the nonsplit fibers refer to ordinary monofilaments which are not split even at the time of carding or at the time of needling or even in the process of manufacturing the paper transporting felt following the needling process.
  • the surface smoothness and the dewatering characteristic which are the characteristics required for the paper transporting felt, are inversely correlated. Hence, if the density of the paper transporting felt is increased to improve the performance of smoothing the surface of the wet paper, the dewatering characteristic tends to deteriorate. Meanwhile, the plurality of press mechanisms disposed from the upstream side in the transporting direction of the wet paper being transported to the downstream side respectively require subtly different functions. Priority is placed on the dewatering characteristic in the case of the paper transporting felt of the press mechanism disposed on the upstream side, while the performance of smoothing the surface of the wet paper is required for the paper transporting felt of the press mechanism disposed on the downstream side. Accordingly, by appropriately changing the mix spinning ratio between the nonsplit fibers and the split fibers, the paper transporting felts can be provided with optimal characteristics (surface smoothing characteristic, dewatering characteristic, etc.) for the respective press mechanisms.
  • each size of the split fibers prior to splitting is 3.3 dtex or smaller, even if the size of the split fiber prior to splitting was 3.3 dtex, the size of the fine fibers formed by the splitting of the split fibers becomes smaller than 3.3 dtex.
  • the wet paper contacting fibrous layer including the slit fibers, which become fine fibers of a size which is practically as close to the size of the fibers of the wet paper as possible by being split is formed, it is possible to manufacture high-quality paper extremely excelling in the surface smoothness.
  • the surface of the wet paper contacting fibrous layer can be made a smoother surface excelling in the paper releasability. Even in a case where fine fibers fallen off or cut off from the wet paper contacting fibrous layer (i.e., fine fibers formed by the splitting of the split fibers) due to the so-called loss of fibers are slightly attached to the surface of the wet paper, since these fine fibers are extremely slender, the quality of the wet paper is not caused to decline.
  • each size of the split fibers prior to splitting is 1.9 dtex, it is more preferable.
  • the nonsplit fibers those having a size of, for example, 1.9 dtex (the same value as the size prior to splitting of the split fibers.) to 6 dtex are preferable.
  • the press apparatus of a paper machine which is a press apparatus of a paper machine having a plurality of press mechanisms each having the paper transporting felt, it is suitable in effectively squeezing water from the wet paper and delivering the wet paper to the ensuing paper transporting felts with excellent paper releasability. Namely, according to the press apparatus of a paper machine, it is possible to effectively squeeze water from the wet paper containing a large amount of water, and the wet paper can be delivered reliably to the ensuing paper transporting felts, thereby permitting high-speed papermaking operation.
  • the paper transporting felt impregnated with a relatively large amount of (within the range of 1 wt.% to 10 wt.%) high polymer elastic material is disposed in the press mechanism disposed on the downstream side in the transporting direction of the wet paper among the plurality of press mechanisms, it is conceivable that the water permeability may slightly decline as compared with the paper transporting felt in which the amount of impregnation with the high polymer elastic material is small.
  • the paper transporting felt has not only the function of smoothing the wet paper surface but also high paper releasability, the wet paper being transported at high speed can be reliably delivered to the drier canvas in the ensuing process, and high-speed papermaking becomes possible.
  • each size of the split fibers prior to splitting is 3.3 dtex or smaller, even if the size of the split fiber prior to splitting was 3.3 dtex, the size of the fine fibers formed by the splitting of the split fibers becomes smaller than 3.3 dtex.
  • the wet paper contacting fibrous layer including the slit fibers, which become fine fibers of a size which is practically as close to the size of the fibers of the wet paper as possible by being split is formed, it is possible to manufacture high-quality paper extremely excelling in the surface smoothness.
  • each size of the split fibers prior to splitting is 1.9 dtex, it is more preferable.
  • the press apparatus of a paper machine since it is a press apparatus of a closed draw type, the wet paper is transported in a state of being sandwiched by the pair of paper transporting felts. Consequently, the wet paper can be transported at an extremely high speed without applying a force to the wet paper which has weak strength and is likely to be cut off. Accordingly, efficient papermaking is made possible.
  • the press apparatus of a paper machine since the press apparatus is a press apparatus of a shoe press type paper machine, the press zone of a pressing portion (i.e., a nip formed by the roll and the shoe) can be made wider. Since the pressing time can thereby be made long, the dewatering characteristic excels further. Moreover, since the so-called re-wetting phenomenon can be prevented, the dewatering performance is high in the portion extending from the center of the pressing portion between the roll and the shoe to the exit.
  • Fig. 1 is a vertical cross-sectional view of an embodiment of a paper transporting felt in accordance with the invention
  • Fig. 2 is an enlarged cross-sectional view of a split fiber for forming a wet paper contacting fibrous layer of the paper transporting felt shown in Fig. 1;
  • Fig. 3 is a plan view illustrating a schematic construction of an embodiment of a press apparatus of a paper machine in accordance with the invention.
  • Fig. 1 is a vertical cross-sectional view of a paper transporting felt 100 in accordance with the invention.
  • Fig. 2 is an enlarged cross-sectional view of a split fiber for forming a wet paper contacting fibrous layer of the paper transporting felt shown in Fig. 1.
  • Fig. 3 is a plan view illustrating a schematic construction of an embodiment of a press apparatus of a paper machine in accordance with the invention.
  • the paper transporting felt 100 has a base layer 11, a batt layer 13 (a first batt layer 13A and a second batt layer 13B) , a hydrophilic nonwoven fabric layer 23, and a wet paper contacting fibrous layer 15.
  • the first batt layer 13A is formed on the wet paper side surface of the base layer 11
  • the second batt layer 13B is formed on the press side surface (more specifically, one side of the pair of rolls or one side of the roll and the shoe) of the base layer 11
  • the hydrophilic nonwoven fabric layer 23 is formed on the wet paper side surface of the first batt layer 13A.
  • the wet paper contacting fibrous layer 15 is formed on the wet paper side surface of the hydrophilic nonwoven fabric layer 23 so as to come into direct contact with a wet paper.
  • the base layer 11, the bat layer 13 (the first batt layer 13A and the second batt layer 13B) , the hydrophilic nonwoven fabric layer 23, and the wet paper contacting fibrous layer 15 are entangled and integrated by needling.
  • the base layer 11 is for imparting strength to the paper transporting felt 100, and it is possible to appropriately use, for instance, woven fabrics using as basic materials those synthetic fibers such as Nylon 6 and Nylon 66 or natural fibers such as wool that excel in such as wear resistance, fatigue resistance, elongation characteristics, or fabrics formed by overlapping yarns without weaving them or those which have been formed into films by using such materials.
  • a woven fabric is adopted as the base layer 11.
  • the batt layer 13 (the first batt layer 13A and the second batt layer 13B) is a nonsplit fiber layer formed by staple fibers 17 having a size of 6 decitex (dtex) or greater (generally, 17 dtex or thereabouts) .
  • dtex decitex
  • the material for forming the batt layer 13 a material similar to that of the base layer 11 is appropriately used.
  • the second batt layer 13B may be omitted in accordance with the characteristics required for the paper transporting felt 100.
  • the hydrophilic nonwoven fabric layer 23 is formed by a hydrophilic nonwoven fabric constructed with a high density by laminating non-split fibers which are finer than the fibers forming the batt layer 13 and which have, for example, a size of 4 dtex or smaller.
  • the hydrophilic nonwoven fabric for forming the hydrophilic nonwoven fabric layer 23 it is possible to cite nonwoven fabrics formed by laminating fibers obtained by melting a resin such as nylon and by forming it into yarn, e.g., spunbonded nonwoven fabrics obtained by laminating continuous filaments, nonwoven fabrics obtained by drawing a molten polymer by hot air into ultra-fine fibers and forming them into sheet form, and so on.
  • the hydrophilic property of the hydrophilic nonwoven fabric layer 23 be such that the angle of contact with water becomes 30° when the moisture percentage of the hydrophilic nonwoven fabric layer 23 is controlled so as to become 30 to 50%. It should be noted that the moisture percentage of the hydrophilic nonwoven fabric layer 23 is determined from (water / total weight) x 100.
  • Fibers for forming the wet paper contacting fibrous layer 15 contain split fibers 15A (i.e., the split fibers 15A account for 100 wt.% of the fibers for forming the wet paper contacting fibrous layer 15) . As shown in Fig.
  • each of the split fibers 15A for forming the wet paper contacting fibrous layer 15 is a composite fiber having a structure in which it is split into a plurality of fine fibers (petal portions 19 and a stem portion 21 which will be described later) by the pressing pressure, friction, hot water rinsing, or the like.
  • Split fibers 15A having a size of 3.3 dtex or smaller are preferable, and fibers with circular sections having a size of 1.9 dtex and a length of 51 mm are used in this embodiment.
  • the split fiber 15A consists of seven portions including the six petal portions 19 with sector-shaped sections and one stem portion 21 with a substantially asterisk-shaped section for joining adjacent ones of the petal portions 19. These portions are combined in a circular section and are formed in a splittable manner.
  • the split fiber 15A is formed of, for instance, Nylon 6 (i.e., N6)
  • the stem portion 21 is formed of, for instance, polybutylene terephthalate (i.e., PBT) .
  • PBT polybutylene terephthalate
  • the reason the size of the split fiber 15A is set to 3.3 dtex or smaller is mainly to facilitate the formation of the wet paper contacting fibrous layer 15, and specifically to ensure that the split fibers 15A are not split when subjected to carding in a preliminary stage of a needling process which is a manufacturing process of the paper transporting felt 100 itself, but are effectively split at the time of the splitting process (e.g., needling, a raising process using a raising machine, hot water rinsing by refining, etc.) which is effected prior to the impregnation with the high polymer elastic material.
  • a needling process e.g., needling, a raising process using a raising machine, hot water rinsing by refining, etc.
  • the fibers for forming the wet paper contacting fibrous layer 15 may not be formed by the split fibers 15A alone. Specifically, the fibers for forming the wet paper contacting fibrous layer 15 may contain 15 wt.% to 100 wt.% of the split fibers 15A and the nonsplit fibers as remains.
  • the nonsplit fibers are monofilaments which are not split even at the time of carding or needling or even in the process of manufacturing the paper transporting felt after the needling process.
  • stable fibers having a size of, for instance, 1.9 dtex
  • Gaps between the fine fibers formed by the splitting of the plurality of split fibers 15A are impregnated with a high polymer elastic material 25 from the wet paper surface side of the wet paper contacting fibrous layer 15.
  • the wet paper contacting fibrous layer 15 contains 1 wt.% to 10 wt.% of the high polymer elastic material 25.
  • a synthetic resin such as water-based urethane resin, water-based acrylic resin, water-based epoxy resin, water-based synthetic rubber (i.e., water- based emulsion resin) , or the like is applied with a roller or sprayed with a sprayer at ordinary temperature to impregnate the gaps between the fine fibers, and is subsequently cured on heating.
  • a synthetic resin such as water-based urethane resin, water-based acrylic resin, water-based epoxy resin, water-based synthetic rubber (i.e., water- based emulsion resin) , or the like is applied with a roller or sprayed with a sprayer at ordinary temperature to impregnate the gaps between the fine fibers, and is subsequently cured on heating.
  • the hydrophilic nonwoven fabric layer 23 is disposed in the layer beneath the wet paper contacting fibrous layer 15
  • the basis weight of the wet paper contacting fibrous layer 15 is 400 g/m2; the basis weight of the hydrophilic nonwoven fabric layer 23 is 40 g/m.2; the basis weight of the first batt layer 13A is 400 g/iu2; the basis weight of the base layer 11 is 650 g/m2; and the basis weight of the second batt layer 13B is 100 g/it ⁇ 2.
  • 5 wt.% (10 g/m.2) of the high polymer elastic material 25 is contained in the wet paper contacting fibrous layer 15.
  • the basis weight of the wet paper contacting fibrous layer 15 is 100 g/m.2; the basis weight of the hydrophilic nonwoven fabric layer 23 is 40 g/m2; the basis weight of the first batt layer 13A is 200 g/ir ⁇ 2; the basis weight of the base layer 11 is 200 g/m2; and the second batt layer 13B is omitted.
  • 1 wt.% (1 g/m2) of the high polymer elastic material 25 is contained in the wet paper contacting fibrous layer 15.
  • the basis weight of the wet paper contacting fibrous layer 15 is 300 g/m2; the basis weight of the hydrophilic nonwoven fabric layer 23 is 40 g/m2; the basis weight of the first batt layer 13A is 800 g/m.2; the basis weight of the base layer 11 is 1500 g/m.2; and the basis weight of the second batt layer 13B is 300 g/m2.
  • 10 wt.% (30 g/m2) of the high polymer elastic material 25 is contained in the wet paper contacting fibrous layer 15.
  • a sheet in which the batt layer 13 has been integrated on both surfaces of the woven base layer 11 by needling and the like is prepared. Then, after the hydrophilic nonwoven fabric layer 23 and a paper sheet of the split fibers 15A after carding are placed on the surface of the first batt layer 13A, the paper sheet of the split fibers 15A, the hydrophilic nonwoven fabric layer 23, the batt layer 13, and the base layer 11 are entangled and integrated by needling therethrough.
  • split fibers 15A are able to maintain their size of 1.9 dtex the time of the carding process, it is possible to prevent the occurrence of fiber masses produced when carding is effected in a state in which, for example, the split fibers 15A are each split into fine fibers (the petal portions 19 and the stem portion 21) .
  • the wet paper contacting fibrous layer 15 having a smooth wet paper side surface covered with the fine fibers and in a state of being not yet impregnated with the high polymer elastic material 25 is formed by splitting the split fibers 15A into fine fibers (the petal portions 19 and the stem portions 21) by needling, friction with a brush of the raising machine, or the splitting operation of such as hot water rinsing in the refining process. Then, the high polymer elastic material 25 is applied to its wet paper side surface with a roller or sprayed with a sprayer to impregnate the gaps between the fine fibers, and is subsequently cured on heating.
  • the hydrophilic nonwoven fabric layer 23 is disposed in the layer beneath the wet paper contacting fibrous layer 15, further impregnation with the high polymer elastic material 25 into the layer below the hydrophilic nonwoven fabric layer 23 is hampered, so that the first batt layer 13A, the base layer 11, and the second batt layer 13B are not impregnated.
  • the high polymer elastic material 25 which can be used, it is possible to cite synthetic resins including, for example, water-based urethane resin, water-based acrylic resin, water-based epoxy resin, water-based synthetic rubber (i.e., water-based emulsion resin), and the like.
  • the impregnation ratio of the high polymer elastic material 25 is appropriately selected in the range of 1 wt.% to 10 wt.% in correspondence with the characteristics required for the press mechanism in which the paper transporting felt 100 is installed.
  • the basis weight of the wet paper contacting fibrous layer 15 is 150 g/m2; the impregnation ratio of the high polymer elastic material 25 is 1 wt.%; the density of the entire fibers forming the paper transporting felt 100 is 0.420 g/cm3; and the air permeability is 25 cc/cm2/sec (this value is a mean value of the values measured by applying a pressure of 125 Pa to test pieces of the paper transporting felt 100 in accordance with the Frazir method on the basis of JIS L 1096) .
  • the basis weight of the wet paper contacting fibrous layer 15 is 200 g/m.2; the impregnation ratio of the high polymer elastic material 25 is 3 wt.%; the density of the entire fibers forming the paper transporting felt 100 is 0.450 g/cm3; and the air permeability is 15 cc/cm2/sec.
  • the basis weight of the wet paper contacting fibrous layer 15 is 250 g/m2; the impregnation ratio of the high polymer elastic material 25 is 5 wt.%; the density of the entire fibers forming the paper transporting felt 100 is 0.500 g/cm3; and the air permeability is 5 cc/cm2/sec.
  • the kinds of fibers for respectively forming the base layer 11, the batt layer 13, the hydrophilic nonwoven fabric layer 23, and the wet paper contacting fibrous layer 15, as well as the type of the high polymer elastic material 25 and the impregnation ratio are selected, as required, by taking into account such as the respective characteristics or the characteristics when combined.
  • the paper transporting felt 100 it is possible to cite one which has a wet paper contacting fibrous layer having mixed- spun fibers containing 30 wt.% of the split fibers 15A of 1.9 dtex and the nonsplit fibers of 3.3 dtex as remains (i.e., 70 wt.%) .
  • the average size of the fibers forming the wet paper contacting fibrous layer is approx. 2.9 dtex.
  • the base layer 11, the batt layer 13, the hydrophilic nonwoven fabric layer 23, and the high polymer elastic material 25 are similar to the ones described above.
  • the press apparatus 300 of the shoe press type paper machine is a so-called closed draw type press apparatus 300 in which two press mechanisms including a first press mechanism 51 and a second press mechanism 53 are disposed in series along a transporting direction of the wet paper W (the direction of arrow A) .
  • the paper machine is constructed as the shoe press type paper machine of the closed draw type in which the wet paper W is transported and pressurized in the state of being sandwiched by two pairs of the paper transporting felts 100 for a shoe press, the wet paper W can be transported stably at a high speed of, for instance, 1200 to 1400 m/min. Consequently, papermaking is made possible at an extremely high efficiency in comparison with the shoe press type paper machine of the open draw type and the like.
  • the first press mechanism 51 includes the pair of the paper transporting felts 100 (100A) for a shoe press, as well as a first shoe 55 and a first roll 57 (i.e., a first shoe press) which are disposed in face-to-face relation so as to form a first nip (i.e., a first pressing portion) therebetween.
  • the second press mechanism 53 includes the pair of the paper transporting felts 100 (100B) for a shoe press, as well as a second shoe 59 and a second roll 61 (i.e., a- second shoe press) which are disposed in face-to-face relation so as to form a second nip (i.e., a second pressing portion) therebetween.
  • the amount of impregnation with the high polymer elastic material 25 in the paper transporting felt IOOA installed in the first press mechanism 51 is normally set to be smaller than the amount of impregnation with the high polymer elastic material 25 in the paper transporting felt IOOB installed in the second press mechanism 53.
  • the paper transporting felt IOOA installed in the first press mechanism 51 is impregnated with 3 wt.% of the high polymer elastic material 25, and the paper transporting felt IOOB installed in the second press mechanism 53 is impregnated with 5 wt.% of the high polymer elastic material 25.
  • the paper transporting felts installed in the second press mechanism 53 disposed on the downstream side the paper transporting felts IOOB in which priority is placed on the function of smoothing the wet paper surface rather than the wet-paper dewatering function are used.
  • the paper transporting felts 100 (10OA; IOOB) may be adopted as the upper and lower paper transporting felts of the first press mechanism 51 and the second press mechanism 53
  • the paper transporting felts 100 (10OA; IOOB) may alternatively be adopted as either the upper paper transporting felts or the lower paper transporting felts of the first press mechanism 51 and the second press mechanism 53.
  • the paper transporting felts 100 (10OA; IOOB) are installed as either the upper paper transporting felts or the lower paper transporting felts of the first press mechanism 51 and the second press mechanism 53, it suffices if arbitrary paper transporting felts are adopted in correspondence with the papermaking characteristics as the other paper transporting felts.
  • only the paper transporting felts IOOA or only the paper transporting felts IOOB may be adopted as the paper transporting felts of the first press mechanism 51 and the second press mechanism 53.
  • the wet paper W carried out from a wire part (not shown) and delivered to the first press mechanism 51 is transported while being sandwiched by the pair of the paper transporting felts 10OA, and water is squeezed out by being pressurized by the first shoe 55 and the first roll 57.
  • the squeezed water is absorbed from the porous wet paper contacting fibrous layer 15 to the first batt layer 13A and the like of each paper transporting felt 10OA.
  • the wet paper W is delivered to the second press mechanism 53 and is transported while being sandwiched by the pair of the paper transporting felts 10OB, and water is further squeezed out by being pressurized by the second shoe 59 and the second roll 61.
  • the squeezed water is absorbed from the porous wet paper contacting fibrous layer 15 to the first batt layer 13A and the like of each paper transporting felt 10OB.
  • the wet paper contacting fibrous layer w 15, with which the wet paper W comes into contact when the wet paper W is delivered from the first press mechanism 51 to the second press mechanism 53 is porous, and since an appropriately irregular surface is formed on its surface, the paper releasability is excellent, so that the wet paper W is easily released from the paper transporting felts IOOA and is reliably delivered to the paper transporting felts 10OB.
  • the wet paper contacting fibrous layer 15 which is brought into direct contact with the wet paper W, is formed as a smooth surface by being covered with the split fine fibers of the split fibers 15A and the high polymer elastic material 25 (plus nonsplit fibers in the case where the wet paper contacting fibrous layer 15 contains the nonsplit fibers) , the wet paper W having a smooth surface is pressurized and is delivered to the drier part (not shown) to dry.
  • the press apparatus 300 having two-stage press mechanisms 51 and 53 by way of one example as an embodiment of the press apparatus of the shoe press type paper machine in accordance with the invention.
  • the press apparatus may be a press apparatus having one press mechanism or a press apparatus in which a multiplicity of press mechanisms are disposed in series (i.e., disposed) .
  • a paper transporting felt 100 which is at least one paper transporting felt 100 of a pair of paper transporting felts for a shoe press, which are disposed in a press apparatus 300 provided in a press part of a shoe press type paper machine, form a press mechanism (51; 53) together with a shoe press having a roll (57; 61) and a shoe (55; 59) in the press apparatus 300, and are pressurized by the roll (57; 61) and the shoe (55; 59) while sandwiching a wet paper W, to absorb water squeezed from the wet paper W.
  • the paper transporting felt 100 has: a base layer 11; a first batt layer 13A which is formed on a wet paper W side surface of the base layer 11; a second batt layer 13B which is formed on a roll (57; 61) side surface or a shoe (55; 59) side surface of the base layer 11; a wet paper contacting fibrous layer 15 which includes a plurality of split fibers 15A split into fine fibers and a high polymer elastic material 25 impregnating gaps between the fine fibers, and is formed on a wet paper W side surface of the first batt layer 13A so as to allow the fine fibers and the high polymer elastic material 25 to come into direct contact with the wet paper W; and a hydrophilic nonwoven fabric layer 23 which is disposed between the first batt layer 13A and the wet paper contacting fibrous layer 15, wherein, in a surface of the wet paper contacting fibrous layer 15 which comes into direct contact with the wet paper W, the fine fibers are partially covered with the high polymer elastic
  • the wet paper contacting fibrous layer 15 contains 1 wt.% to 10 wt.% of the high polymer elastic material 25.
  • the fibers for forming the wet paper contacting fibrous layer 15 may contain 15 wt.% to 100 wt.% of the split fibers 15A and the nonsplit fibers as remains.
  • the press apparatus 300 of a shoe press type paper machine is a press apparatus of a shoe press type paper machine having a plurality of press mechanisms each having the pair of paper transporting felts 100 (IOOA; 100B) , wherein the plurality of press mechanisms (51, 53) are disposed in series (i.e., disposed) along the transporting direction A of the wet paper W transported by the paper transporting felts IOOA and 10OB.
  • Each size of the split fibers 15A prior to splitting in the paper transporting felt 100 (IOOA; 100B) is 3.3 dtex or smaller, more preferably 1.9 dtex.
  • the press apparatus 300 of a shoe press type paper machine is a press machine of a closed draw type.
  • the wet paper contacting fibrous layer 15, which has been formed by splitting the plurality of split fibers 15A into fine fibers and by subsequently impregnating gaps between the fine fibers with the high polymer elastic material 25, is formed on the wet paper side surface of the first batt layer 13A of the paper transporting felt 100 so as to be brought into direct contact with the wet paper W. Therefore, it is possible to improve the surface smoothness of the wet paper contacting fibrous layer 15, thereby making it possible to manufacture high-quality paper having a smooth surface.
  • the surface of the wet paper contacting fibrous layer 15 is formed as a surface in which the fine fibers formed by the splitting of the split fibers 15A are partially covered with the high polymer elastic material 25. Since the surface of the wet paper contacting fibrous layer 15 has slight irregularities caused by the projection of these infinitesimal fine fibers, water films between the wet paper contacting fibrous layer 15 and the wet paper W are likely to be broken or are difficult to be formed. Hence, the paper releasability from the paper transporting felt 100 is excellent, so that the wet paper W can be easily delivered to the drier canvas in the ensuing process.
  • the wet paper contacting fibrous layer 15 is formed as one having mixed-spun fibers of the split fibers 15A and nonsplit fibers, gaps between the fine fibers (those obtained by the splitting of the split fibers 15A) , gaps between the fine fibers and the nonsplit fibers, and gaps between the nonsplit fibers are impregnated with the high polymer elastic material 25.
  • the fine fibers and the nonsplit fibers are partially covered with the high polymer elastic material 25, and the surface of the wet paper contacting fibrous layer 15 has slight irregularities .
  • the paper releasability from the paper transporting felt 100 is excellent, so that the wet paper W can be easily delivered to the drier canvas in the ensuing process.
  • the fine fibers formed by the splitting of the split fibers 15A are combined to some extent and are partially covered by the high polymer elastic material 25, the so-called capillary phenomenon is difficult to occur, and the falling off of these fine fibers from the paper transporting felt 100 is prevented. Consequently, as for the paper manufactured by the shoe press type paper machine using the paper transporting felts 100, its surface becomes extremely smooth. Moreover, since the life of the paper transporting felt 100 (i.e., the usable period of the paper transporting felt 100) is long, it is possible to decrease the frequency of maintenance for replacing the paper transporting felt 100 with a new one.
  • the hydrophilic nonwoven fabric layer 23 is disposed between the first batt layer 13A and the wet paper contacting fibrous layer 15, the high polymer elastic material 25 with which the wet paper contacting fibrous layer 15 is impregnated from its surface side is blocked by the hydrophilic nonwoven fabric layer 23, and layers deeper than the hydrophilic nonwoven fabric layer 23 (i.e., the first batt layer 13A, the base layer 11, and the second batt layer 13B) are not impregnated with the high polymer elastic material 25.
  • the high polymer elastic material 25 is disposed only in the wet paper contacting fibrous layer 15 (e.g., by 0.5 mm or thereabouts from the surface) .
  • the paper transporting felt 100 since the paper transporting felt 100 has water permeability and appropriate compressing and recovering functions (cushionability) , the paper transporting felt 100 is able to exhibit its dewatering characteristic effectively.
  • stains specifically, components of such as additives and paste contained in the wet paper W
  • the paper transporting felt 100 has a high self- cleaning function.
  • the press apparatus 300 of a shoe press type paper machine if the plurality of press mechanisms 51 and 53 each having the pair of paper transporting felts 100 (10OA; 100B) are disposed in series along the transporting direction A of the wet paper W being transported by the paper transporting felts 100 (10OA and 100B) , it is suitable in effectively squeezing water from the wet paper W and delivering the wet paper W to the ensuing paper transporting felts with excellent paper releasability. Namely, it is possible to effectively squeeze water from the wet paper W containing a large amount of water, and the wet paper W can be delivered reliably to the ensuing paper transporting felts, thereby permitting high-speed papermaking operation.
  • the paper transporting felt IOOB impregnated with a relatively large amount of (within the range of 1 wt.% to 10 wt.%) high polymer elastic material 25 is disposed in the press mechanism 53 disposed on the downstream side in the transporting direction of the wet paper W among the plurality of press mechanisms 51 and 53, it is conceivable that the water permeability may slightly decline as compared with the paper transporting felt IOOA in which the amount of impregnation with the high polymer elastic material 25 is small.
  • the paper transporting felt IOOB has not only the function of smoothing the wet paper surface but also high paper releasability, the wet paper W being transported at high speed can be reliably delivered to the drier canvas in the ensuing process, and high-speed papermaking becomes possible.
  • the weight ratio of the mixed-spun fibers is defined by "weight of the split fibers 15A / (weight of the split fibers 15A + weight of the nonsplit fibers) x 100.”
  • the surface smoothness and the dewatering characteristic which are the characteristics required for the paper transporting felt 100, are inversely correlated. Hence, if the density of the paper transporting felt 100 is increased to improve the performance of smoothing the surface of the wet paper W, the dewatering characteristic tends to deteriorate.
  • the plurality of press mechanisms 51 and 53 disposed from the upstream side in the transporting direction of the wet paper W being transported to the downstream side respectively require subtly different functions.
  • Priority is placed on the dewatering characteristic in the case of the paper transporting felt IOOA of the press mechanism 51 disposed on the upstream side, while the performance of smoothing the surface of the wet paper W is required for the paper transporting felt IOOB of the press mechanism 53 disposed on the downstream side. Accordingly, by appropriately changing the mix spinning ratio between the nonsplit fibers and the split fibers 15A, the paper transporting felts 100 can be provided with optimal characteristics (surface smoothing characteristic, dewatering characteristic, etc.) for the respective press mechanisms 51 and 53.
  • the wet paper contacting fibrous layer 15 contains 1 wt.% to 10 wt.% of the high polymer elastic material 25, not all the pores between the fibers are filled with the high polymer elastic material 25, and appropriate porosity is maintained between the fibers. In other words, the structure is made porous. Therefore, water films formed between the wet paper contacting fibrous layer 15 and the wet paper W are dispersed, and appropriate cushionability is provided.
  • a paper transporting felt 100 the paper releasability from which is excellent, which absorbs water squeezed from the wet paper W by stretching by being pressurized by the roll 57 or 61 and the shoe 55 or 59 in each press mechanism 51 or 53, and which has a smooth surface.
  • the paper transporting felts 100 can be provided with optimal characteristics (paper releasability, surface smoothing characteristic, dewatering characteristic, etc.) for the respective press mechanisms 51 and 53.
  • the size of each of the split fibers 15A prior to splitting is 3.3 dtex or smaller, even if the size of the split fiber 15A prior to splitting was 3.3 dtex, the size of the fine fibers formed by the splitting of the split fibers 15A becomes smaller than 3.3 dtex.
  • the wet paper contacting fibrous layer 15 including the slit fibers 15A which become fine fibers of a size which is practically as close to the size of the fibers of the wet paper W as possible by being split, is formed, it is possible to manufacture high-quality paper extremely excelling in the surface smoothness.
  • the surface of the wet paper contacting fibrous layer 15 can be made a smoother surface excelling in the paper releasability. Even in a case where fine fibers fallen off or cut off from the wet paper contacting fibrous layer 15 (i.e., fine fibers formed by the splitting of the split fibers 15A) due to the so-called loss of fibers are slightly attached to the surface of the wet paper W, since these fine fibers are extremely slender, the quality of the wet paper W is not caused to decline. In addition, it is more preferable if the size of each of the split fibers 15A prior to splitting is a small value such as 1.9 dtex.
  • the paper transporting felt 100 is such that after the split fibers 15A of the wet paper contacting fibrous layer 15 are split into fine fibers, the gaps between these fine fibers are impregnated with the high polymer elastic material 25.
  • the splitting of the split fibers 15A is preferably effected in the needling process which if one of the processes of manufacturing the paper transporting felt. Fiber masses (i.e., masses of fibers) are likely to be produced if the split fibers 15A are split into fine fibers by carding in a preliminary stage of a needling process. These fiber masses are implanted by needling, and relatively large irregularities are formed on the surface of the paper transporting felt, so that the surface smoothness of the wet paper declines.
  • the splitting of the split fibers 15A may be effected, for instance, by needling using small-gauge needles in the needling process, by rubbing the implanted split fibers 15A with a brush (commonly called a teasel) of a raising machine after the needling process, or by refining (hot water rinsing) the paper transporting felt 100 after the needling process.
  • the splitting of the split fibers 15 may be effected in any process insofar as the process is carried out after carding, which is the preliminary stage of the needling process, and before the impregnation with the high polymer elastic material 25.
  • the gaps between the fine fibers are impregnated with the high polymer elastic material 25.
  • the impregnation with the high polymer elastic material 25 is performed as follows: After the split fibers 15A are split into fine fibers, a synthetic resin such as water-based urethane resin, water-based acrylic resin, water-based epoxy resin, water-based synthetic rubber (i.e., water-based emulsion resin), or the like is applied with a roller or sprayed with a sprayer at ordinary temperature to impregnate the gaps between the fine fibers, and is subsequently cured on heating.
  • a synthetic resin such as water-based urethane resin, water-based acrylic resin, water-based epoxy resin, water-based synthetic rubber (i.e., water-based emulsion resin), or the like is applied with a roller or sprayed with a sprayer at ordinary temperature to impregnate the gaps between the fine fibers, and is subsequently cured on heating.
  • the press apparatus 300 of a shoe press type paper machine since it is a press apparatus of a closed draw type, the wet paper W is transported in a state of being sandwiched by the pair of paper transporting felts 100. Consequently, the wet paper W can be transported at an extremely high speed without applying a force to the wet paper W which has weak strength and is likely to be cut off. Accordingly, efficient papermaking is made possible.

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Abstract

L’invention concerne un feutre de transport de papier (100) comprenant une couche de base (11), une première couche de dalle (13A) formée sur une surface latérale du papier mouillé de la couche de base, une deuxième couche de dalle (13B) formée sur une surface située du côté presse de la couche de base, une couche fibreuse (15) en contact avec le papier mouillé comprenant une pluralité de fibres refendues en fibres fines et un matériau élastique de haut polymère (25) imprégnant les interstices entre les fibres fines et formé sur une surface latérale du papier mouillé de la première couche de dalle de manière à permettre aux fibres fines et au matériau élastique de haut polymère d’entrer en contact direct avec le papier mouillé ainsi qu’une couche de tissu non tissé hydrophobe (23) disposée entre la première couche de dalle et la couche fibreuse en contact avec le papier mouillé. Dans une surface de la couche fibreuse en contact avec le papier mouillé entrant en contact direct avec le papier mouillé, les fibres fines sont recouvertes en partie de matériau élastique de haut polymère.
PCT/JP2005/014368 2004-09-29 2005-07-29 Feutre de transport de papier, appareil de presse de machine à papier munie du feutre de transport de papier WO2006035549A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP05768671A EP1799904A1 (fr) 2004-09-29 2005-07-29 Feutre de transport de papier, appareil de presse de machine à papier munie du feutre de transport de papier
US11/662,261 US20070240844A1 (en) 2004-09-29 2005-07-29 Paper Transporting Felt and Press Apparatus of Paper Machine Having the Paper Transporting Felt

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2004284264A JP4522212B2 (ja) 2004-09-29 2004-09-29 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
JP2004-284264 2004-09-29

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WO2006035549A1 true WO2006035549A1 (fr) 2006-04-06
WO2006035549A8 WO2006035549A8 (fr) 2006-10-12

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WO (1) WO2006035549A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1767694A1 (fr) * 2004-06-25 2007-03-28 Ichikawa Co.,Ltd. Feutre pour la fabrication de papier
EP1956140A2 (fr) * 2007-02-09 2008-08-13 Voith Patent GmbH Feutre de presse à haute densité
CN103382673B (zh) * 2006-07-06 2015-05-27 市川株式会社 用于造纸的毛布

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4891826B2 (ja) * 2007-03-30 2012-03-07 イチカワ株式会社 抄紙用プレスフェルト

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999032715A1 (fr) * 1997-12-18 1999-07-01 Voith Fabrics Heidenheim Gmbh & Co. Kg Toile de machine a papier
EP1403426A1 (fr) * 2002-09-30 2004-03-31 Ichikawa Co.,Ltd. Bande pour transférer une bande de papier humide
EP1413673A1 (fr) * 2002-10-24 2004-04-28 Ichikawa Co.,Ltd. Feutre et dispositif de pressage pour une machine à papier

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI64960C (fi) * 1982-10-08 1984-02-10 Tamfelt Oy Ab Transportfilt foer papperstillverkning och foerfarande foer des tillverkning
GB9026475D0 (en) * 1990-12-05 1991-01-23 Albany Research Uk Improvements in and relating to paper machine clothing
GB9125889D0 (en) * 1991-12-05 1992-02-05 Albany Research Uk Improvements in and relating to paper machine clothing
JP3187942B2 (ja) * 1992-05-23 2001-07-16 日本フエルト株式会社 抄紙用フエルト及びその製造方法
JP3360145B2 (ja) * 1992-10-08 2002-12-24 日本製紙株式会社 製紙用プレスフエルトおよびその製造方法
ZA982563B (en) * 1997-08-08 1998-10-08 Albany Int Corp Functional expocy-silicone coatings for paper machine clothings and a method of coating same
JP3488403B2 (ja) * 1999-09-20 2004-01-19 市川毛織株式会社 湿紙搬送ベルト及びその製造方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999032715A1 (fr) * 1997-12-18 1999-07-01 Voith Fabrics Heidenheim Gmbh & Co. Kg Toile de machine a papier
EP1403426A1 (fr) * 2002-09-30 2004-03-31 Ichikawa Co.,Ltd. Bande pour transférer une bande de papier humide
JP2004124274A (ja) * 2002-09-30 2004-04-22 Ichikawa Woolen Textile Co Ltd 湿紙搬送用ベルト
EP1413673A1 (fr) * 2002-10-24 2004-04-28 Ichikawa Co.,Ltd. Feutre et dispositif de pressage pour une machine à papier

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 2003, no. 12 5 December 2003 (2003-12-05) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1767694A1 (fr) * 2004-06-25 2007-03-28 Ichikawa Co.,Ltd. Feutre pour la fabrication de papier
EP1767694A4 (fr) * 2004-06-25 2007-08-29 Ichikawa Co Ltd Feutre pour la fabrication de papier
CN103382673B (zh) * 2006-07-06 2015-05-27 市川株式会社 用于造纸的毛布
EP1956140A2 (fr) * 2007-02-09 2008-08-13 Voith Patent GmbH Feutre de presse à haute densité
EP1956140A3 (fr) * 2007-02-09 2008-08-20 Voith Patent GmbH Feutre de presse à haute densité

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JP2006097181A (ja) 2006-04-13
JP4522212B2 (ja) 2010-08-11
EP1799904A1 (fr) 2007-06-27
CN101052764A (zh) 2007-10-10
US20070240844A1 (en) 2007-10-18
WO2006035549A8 (fr) 2006-10-12

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