CN101384770A - Press felt for papermaking - Google Patents
Press felt for papermaking Download PDFInfo
- Publication number
- CN101384770A CN101384770A CNA2007800050653A CN200780005065A CN101384770A CN 101384770 A CN101384770 A CN 101384770A CN A2007800050653 A CNA2007800050653 A CN A2007800050653A CN 200780005065 A CN200780005065 A CN 200780005065A CN 101384770 A CN101384770 A CN 101384770A
- Authority
- CN
- China
- Prior art keywords
- nylon
- core
- layer
- batt
- press felt
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 94
- 229920001778 nylon Polymers 0.000 claims abstract description 87
- 239000000835 fiber Substances 0.000 claims abstract description 84
- 239000004677 Nylon Substances 0.000 claims abstract description 76
- 239000002131 composite material Substances 0.000 claims abstract description 58
- 238000002844 melting Methods 0.000 claims abstract description 5
- 239000000758 substrate Substances 0.000 claims abstract description 4
- 239000011159 matrix material Substances 0.000 claims description 35
- 239000000203 mixture Substances 0.000 claims description 31
- 239000004744 fabric Substances 0.000 claims description 15
- 229920000742 Cotton Polymers 0.000 claims description 14
- 238000009941 weaving Methods 0.000 claims description 11
- 238000010276 construction Methods 0.000 claims description 3
- 238000007906 compression Methods 0.000 abstract description 24
- 230000006835 compression Effects 0.000 abstract description 24
- 238000005299 abrasion Methods 0.000 abstract description 2
- 239000000306 component Substances 0.000 abstract 2
- 239000008358 core component Substances 0.000 abstract 2
- 230000008018 melting Effects 0.000 abstract 1
- 239000011162 core material Substances 0.000 description 72
- 229940126062 Compound A Drugs 0.000 description 16
- NLDMNSXOCDLTTB-UHFFFAOYSA-N Heterophylliin A Natural products O1C2COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC2C(OC(=O)C=2C=C(O)C(O)=C(O)C=2)C(O)C1OC(=O)C1=CC(O)=C(O)C(O)=C1 NLDMNSXOCDLTTB-UHFFFAOYSA-N 0.000 description 16
- 229920002292 Nylon 6 Polymers 0.000 description 16
- 239000000463 material Substances 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 11
- 238000011156 evaluation Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 238000009954 braiding Methods 0.000 description 8
- 230000035617 depilation Effects 0.000 description 8
- 229920002302 Nylon 6,6 Polymers 0.000 description 7
- 229920000572 Nylon 6/12 Polymers 0.000 description 7
- 229920001577 copolymer Polymers 0.000 description 7
- 229920000305 Nylon 6,10 Polymers 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 description 6
- 238000003825 pressing Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- ZMUCVNSKULGPQG-UHFFFAOYSA-N dodecanedioic acid;hexane-1,6-diamine Chemical class NCCCCCCN.OC(=O)CCCCCCCCCCC(O)=O ZMUCVNSKULGPQG-UHFFFAOYSA-N 0.000 description 5
- 238000006068 polycondensation reaction Methods 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 230000004927 fusion Effects 0.000 description 4
- 210000004209 hair Anatomy 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000006116 polymerization reaction Methods 0.000 description 4
- 229920003189 Nylon 4,6 Polymers 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005755 formation reaction Methods 0.000 description 3
- 238000007731 hot pressing Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000009987 spinning Methods 0.000 description 3
- 229920000299 Nylon 12 Polymers 0.000 description 2
- 229920000577 Nylon 6/66 Polymers 0.000 description 2
- 241000293001 Oxytropis besseyi Species 0.000 description 2
- TZYHIGCKINZLPD-UHFFFAOYSA-N azepan-2-one;hexane-1,6-diamine;hexanedioic acid Chemical compound NCCCCCCN.O=C1CCCCCN1.OC(=O)CCCCC(O)=O TZYHIGCKINZLPD-UHFFFAOYSA-N 0.000 description 2
- 238000012669 compression test Methods 0.000 description 2
- 210000003746 feather Anatomy 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 210000002268 wool Anatomy 0.000 description 2
- UFFRSDWQMJYQNE-UHFFFAOYSA-N 6-azaniumylhexylazanium;hexanedioate Chemical compound [NH3+]CCCCCC[NH3+].[O-]C(=O)CCCCC([O-])=O UFFRSDWQMJYQNE-UHFFFAOYSA-N 0.000 description 1
- JHWNWJKBPDFINM-UHFFFAOYSA-N Laurolactam Chemical compound O=C1CCCCCCCCCCCN1 JHWNWJKBPDFINM-UHFFFAOYSA-N 0.000 description 1
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
- 238000001467 acupuncture Methods 0.000 description 1
- WNLRTRBMVRJNCN-UHFFFAOYSA-L adipate(2-) Chemical compound [O-]C(=O)CCCCC([O-])=O WNLRTRBMVRJNCN-UHFFFAOYSA-L 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229920003231 aliphatic polyamide Polymers 0.000 description 1
- 238000012660 binary copolymerization Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- YWJUZWOHLHBWQY-UHFFFAOYSA-N decanedioic acid;hexane-1,6-diamine Chemical compound NCCCCCCN.OC(=O)CCCCCCCCC(O)=O YWJUZWOHLHBWQY-UHFFFAOYSA-N 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 230000005021 gait Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000009940 knitting Methods 0.000 description 1
- 150000003951 lactams Chemical class 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000004439 roughness measurement Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- -1 wool Substances 0.000 description 1
Images
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
-
- 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
-
- 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
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G9/00—Other accessories for paper-making machines
- D21G9/0009—Paper-making control systems
Abstract
This invention provides a press felt (10) for papermaking, comprising a substrate (30), a wet paper-side vat layer (20) and a press-side vat layer (23). The wet paper-side vat layer (20) comprises a wet paper contact-side vat layer (21) and a substrate-side vat layer (22). The wet paper contact-side vat layer (21) comprises a core-sheath composite fiber (41) comprising a core component of a high-molecular weight nylon having an absolute viscosity of not less than 80 mPas and a sheath component of a nylon having a lower melting point than the core component. The substrate-side vat layer (22) comprises a layer of a nylon fiber (42) free from the core-sheath composite fiber (41). The sheath component of the core-sheath composite fiber (41) is melted to render the wet paper contact-side vat layer (21) dense, and, consequently, moisture in the press-side vat layer (23) is less likely to be moved to the wet paper side, whereby a remoistening phenomenon can be suppressed. Further, since the substrate-side vat layer (22) comprises a nylon layer free from the core-sheath composite fiber, the balance among smoothness, defiber resistance, abrasion resistance, compression fatigue resistance, and water drainage is good.
Description
Technical field
The press felt for papermaking that the present invention relates in papermaking equipment, use (being designated hereinafter simply as " press felt ").
Background technology
All the time, in the papermaking operation, for the moisture of sloughing in the l Water Paper uses pressing device.In pressing device, the l Water Paper that has formed ply of paper dewaters by press felt in press. nips.In addition, pressing device all is made of a plurality of press. nips usually.
Fig. 5 is the skeleton diagram of press. nips in the pressing device.
This press. nips comprises a pair of press felt 11 ', 11 ' of a pair of pressure roller P ', P ' and clamping l Water Paper W ', pressurization part at pressure roller P ', P ', to press felt 11 ', 11 ' and l Water Paper W ' exert pressure, the moisture of l Water Paper W ' is squeezed out, and is absorbed by press felt 11 ', 11 '.
But to outlet, owing to sharply discharge to l Water Paper W ' and press felt 11 ', 11 ' institute's applied pressure, thereby in this part, press felt 11 ', 11 ' volume sharply expand from pressurization part central authorities (nip portion).Its consequence is to produce negative pressure in press felt 11 ', 11 ', and then, owing to l Water Paper W ' is made up of fine fibre, also with capillarity, therefore the phenomenon that press felt 11 ', the 11 ' moisture that is absorbed move on to wet paper once more can appear, i.e. rewetting phenomenon (re-wetting).
Woollen blanket as anti-rewetting phenomenon here for example has and opens disclosed press felt in the 2004-143627 communique (patent documentation 1) the spy.This is in the woollen blanket of being made up of basic unit, wet paper batt, squeezing side batt, in the wet paper batt, be provided with the press felt of hydrophilic non-woven, therefore utilize the hydrophilic interaction of this hydrophilic non-woven, moisture is brought into play to the effect of the transfer of hydrophilic non-woven, the effect that keeps being transferred moisture, therefore can suppress the rewetting phenomenon effectively.
In addition, in press felt for papermaking, for keeping the function (water squeezing) that from l Water Paper, squeezes the water out, the woollen blanket of pressurization compression can flattening when removing pressure and can restore funcitons (compression and fatigue resisting), also come into one's own by function (flatness) and anti-depilation and the abrasion etc. that woollen blanket become smoothly improve the l Water Paper flatness.
As woollen blanket with such function, for example to open in the flat 8-302584 communique (patent documentation 2) and disclose the press felt that contains fiber with core sheath structure the spy, described core sheath structure is made of two component materials.
In this press felt, as batt fiber, two component materials that use is made up of low-melting sheath material and dystectic core material, make low-melting sheath material softening and in batt, form matrix (matrix) by press felt being carried out the heat hardening processing, thereby improve the dewatering and drainage performance of press felt, and can strengthen the ability of opposing compression.
Have again,, used by water squeezing and the good press felt of weaving cotton cloth and making of flatness for adapting to up-to-date high speed paper machine tool.This organizine of weaving cotton cloth (silk of the CMD direction of woollen blanket) and tram (silk of MD direction similarly) are made into (spy opens the 2000-170086 communique, referring to patent documentation 3) by monofilament.
Summary of the invention
But there are the problem that suffers easily from the compression fatigue repeatedly of pressing device in patent documentation 1 and 2 press felt.
And, press felt as patent documentation 2, when in batt, using two component materials, because the influence that the hot pressing when woollen blanket is made is pressed, the mechanical strength that causes core material reduces, and it is aging that chemical takes place, and the fiber fracture of wire takes place in the use of press felt the result, depilation, wearing and tearing increase, so the situation that the stage of replacement shortens takes place more.
And known that the press felt of patent documentation 3 is compared with using existing woollen blanket of twisting thread, because the anchorage variation that acupuncture makes wool fibre and weaves cotton cloth, so the depilation of woollen blanket, the remarkable variation of abrasiveness.
Therefore, expect a kind ofly when suppressing the rewetting phenomenon, balancedly possess the press felt of compression and fatigue resisting, flatness, anti-depilation and functions such as abrasiveness and water squeezing.
Consider the problems referred to above, the purpose of this invention is to provide a kind of when suppressing the rewetting phenomenon, the press felt for papermaking that flatness, mar proof, compression and fatigue resisting and water squeezing are good.
The present invention solves the problems referred to above by a kind of press felt for papermaking, described press felt is by matrix and comprise that the wet paper layer and the batt of squeezing side layer constitute, it is characterized in that aforementioned wet paper layer comprises l Water Paper contact side batt and matrix side batt, aforementioned l Water Paper contact side batt contains the core sheath composite fibre that is made of core composition and sheath composition, described core composition is made up of the high molecular weight nylon of absolute viscosity more than 80mPas, described sheath composition is made up of the low-melting nylon than this core composition, and aforementioned l Water Paper contact side batt is made up of the nylon layer that does not contain aforementioned core sheath composite fibre.
Here said absolute viscosity is meant 0.5g nylon is dissolved in the sulfuric acid of 100ml 95% more than 80mPas, and the absolute viscosity of measuring under 25 ℃ of temperature can use vibrating type viscometer to measure.
The content of the aforementioned core sheath composite fibre in the aforementioned l Water Paper contact side batt is preferably 25%～75%.
Aforementioned l Water Paper contact side batt can also be made sandwich construction, to wet paper, the content of aforementioned core sheath composite fibre progressively increases from the squeezing side of aforementioned l Water Paper contact side batt.
And aforementioned substrates (sometimes claim " basic unit ") is preferably organizine (silk of the CMD direction of woollen blanket) and tram (silk of MD direction similarly) all by weaving cotton cloth that monofilament is made into.
Among the present invention, the sheath composition fusion of core sheath composite fibre and make l Water Paper contact side batt become fine and close.The result is that the moisture of squeezing side layer is difficult to move to wet paper because of aforementioned l Water Paper contact side batt becomes barrier, so can suppress the rewetting phenomenon.
Simultaneously, the viscosity of the core composition by making aforementioned core sheath composite fibre is big, promptly uses high molecular weight nylon, makes anti-depilation and the abrasiveness and the compression and fatigue resisting raising of woollen blanket, the result has obtained following effect: the life-span of woollen blanket (life) prolongs, so the replacing number of times of woollen blanket reduces; Reduce owing to be attached to the situation of l Water Paper because of the hair that loses hair or feathers, wearing and tearing come off, so the paper products quality improving; Kept flatness of l Water Paper contact-making surface or the like.
And, l Water Paper contact side batt is made of core sheath composite fibre, the matrix side batt that forms on the wet paper surface of matrix is made of the nylon layer that does not contain core sheath composite fibre, so balancedly possess flatness, anti-depilation and abrasiveness, compression and fatigue resisting and water squeezing.
And, will be used for matrix by weaving cotton cloth of being made into of monofilament, the water permeability of weaving cotton cloth improves, so can form the good woollen blanket of water squeezing.
Description of drawings
Fig. 1 is the sectional view of the embodiment of press felt of the present invention.
Fig. 2 is the sectional view of another embodiment of press felt of the present invention.
Fig. 3 is the synoptic diagram that is used to confirm the device of press felt effect of the present invention.
Fig. 4 is the synoptic diagram that is used to confirm the device of press felt effect of the present invention.
Fig. 5 is the diagrammatic illustration figure of the pressing device of papermaking equipment.
The specific embodiment
Below press felt for papermaking of the present invention is described in detail.
Fig. 1 is the sectional view of the CMD direction of press felt 10 of the present invention.
In addition, " operating direction (MD) " is the warp-wise that paper machine moves press felt, and " mechanical transverse direction (CMD) " is the broadwise that the crosscut paper machine moves the direction of press felt.
As shown in Figure 1, press felt 10 has matrix 30, wet paper batt 20, squeezing side batt 23, and wet paper batt 20 comprises l Water Paper contact side batt 21 and the matrix side batts 22 that are provided with in these l Water Paper contact side batt 21 inboards.
L Water Paper contact side batt 21, matrix side batt 22, squeezing side batt 23 are made of staple fibre (staplefiber), respectively with the wet paper of matrix 30 with squeeze side and be wound in one, l Water Paper contact side batt 21 is wound in one by needle point method and matrix side batt 22 by needle point method (needlepunching) for matrix side batt 22 and squeezing side batt 23.
In press felt 10 of the present invention, l Water Paper contact side batt 21 contains the staple fibre of the core sheath composite fibre 41 that is made of core composition and sheath composition, described core composition during by 25 ℃ of temperature the high molecular weight nylon of its absolute viscosity more than 80mPas form, described sheath composition is made up of the nylon lower than the fusing point of this core composition, and matrix side batt 22 is made of the staple fibre of the existing nylon fiber 42 that does not contain core sheath composite fibre 41.
Absolute viscosity is meant 0.5g nylon is dissolved in the sulfuric acid of 100ml 95% more than 80mPas during 25 ℃ of said here temperature, the absolute viscosity of under 25 ℃ of temperature, measuring, and this can use vibrating type viscometer to measure.
In addition, in Fig. 1, for simplicity, core sheath composite fibre 41 is represented turgidly.
In the past, when the fiber that will have a core sheath structure that is made of two component materials used in the batt of press felt, for the viscosity of core composition, promptly molecular weight was not considered.In the present invention, the core composition adopts and compares high viscosity with routine, be the nylon of high molecular, and, to be arranged on the outside of the matrix side batt that forms on the wet paper surface of matrix by the layer (l Water Paper contact side batt) that this core sheath composite fibre constitutes, can balancedly possess flatness, anti-depilation and abrasiveness, compression and fatigue resisting thus.
Used nylon is the high molecular weight nylon of absolute viscosity more than 80mPas when 25 ℃ of temperature in the core composition of core sheath composite fibre 41, and, adopt its fusing point nylon higher than the fusing point of sheath composition.Owing to make the nylon of core composition have high viscosity (more than the 80mPas), so improved anti-depilation and the abrasiveness and the compression and fatigue resisting of woollen blanket.Think that this is because the strand of high molecular weight nylon is elongated, so improved by the mechanical property (durability such as intensity, friction and wear) of the decision of the winding effect between the strand.Use absolute viscosity below 80mPas during the nylon of (medium-viscosity), anti-depilation that is obtained and abrasiveness and compression and fatigue resisting effect are insufficient.
The preferred nylon that uses is preferably high molecular weight nylon 6, high molecular weight nylon 66, high molecular weight nylon 46, high molecular weight nylon 610, high molecular weight nylon 612 etc. in the core composition.In detail, the polymerization (nylon 6) of preferred ε caprolactam, the polycondensation (nylon 66), 1 of hexamethylene diamine adipate, the nylon that polycondensation by nylon salt such as the polycondensation (nylon 612) of the polycondensation (nylon 46) of 4-butanediamine adipate, the polycondensation (NYLON610) of hexamethylene diamine sebacate, hexamethylene diamine dodecanedioic acid salt obtains can also exemplify out the fusing point measured by DSC (differential scanning calorimeter meter) at the aliphatic nylon more than 200 ℃.The absolute viscosity of these macromolecule nylons in 0.5g/100ml 95% sulfuric acid is preferably more than 80mPas.In addition, these high molecular weight nylons adopt known polymerization preparation, and perhaps the nylon6 chips with polymerization places oxygen-free 120～200 ℃ inert gas environment, adopt method for solid phase polymerization (for example special table 2002-529604 number) preparation.
Nylon used in the sheath composition of core sheath composite fibre 41 is lower than nylon fusing point used in the core composition.The example of the preferred nylon that uses has binary copolymerization nylon such as nylon 6/12, nylon 6/610, nylon 66/6, nylon 66/12, nylon 66/610, terpolyamides such as nylon 6/66/12, nylon 6/66/610 in the sheath composition.In addition, know, the fusing point of these copolymer nylons is formed (the weight % of copolymer composition) difference according to it and is changed, and spendable copolymer nylon is limited to its fusing point at the copolymer nylon below 180 ℃ among the present invention.
When carrying out the hot pressing press for extracting juice in the preparation section of press felt, the fusion of sheath composition causes core sheath composite fibre 41 filament contraction thus, accompanies therewith, and it is fine and close that l Water Paper contact side batt 21 becomes, so the raising of woollen blanket surface smoothing.
L Water Paper contact side batt 21 becomes after the densification, when press felt 10 breaks away from nip pressure, because compacted zone has formed barrier, matrix 30, the matrix side batt 22 and the moisture in the squeezing side batt 23 that the squeezing side surface forms that form on the wet paper surface of matrix are difficult to move, and have therefore effectively suppressed the rewetting phenomenon.
Among the present invention, do not contain core sheath composite fibre 41 in the matrix side batt 22, and constitute, only in l Water Paper contact side batt 21, contain core sheath composite fibre 41 by common nylon fiber 42.Therefore balancedly possess flatness, anti-depilation and abrasiveness, compression and fatigue resisting and water squeezing.If in matrix side batt 22, contain core sheath composite fibre 41, then sheath composition fusion, the batt that forms on the wet paper surface of matrix all becomes and does not have compressibility, so anti-depilation and abrasiveness are good, but the water squeezing variation of woollen blanket.
L Water Paper contact side batt 21 preferably by with core sheath composite fibre 41 and conventional nylon fiber 42 by a certain percentage the fiber of blending gained constitute, can more balancedly possess flatness, mar proof, compression and fatigue resisting thus.At this moment, blending rate is preferably, and the content of core sheath composite fibre 41 is 75%～25%, and the content of nylon fiber 42 is 25%～75%.
The content of core sheath composite fibre 41 is less than 25% o'clock, and the compactness step-down of l Water Paper contact side batt 21 is so the flatness variation on woollen blanket surface can't obtain the effect of enough inhibition rewetting phenomenons.
On the other hand, the content of core sheath composite fibre 41 surpasses at 75% o'clock, and flatness, the mar proof of woollen blanket are good, therefore can effectively suppress the rewetting phenomenon, but l Water Paper contact side batt 21 easy compression fatigues, and the tendency of easy flattening is arranged.
Also l Water Paper contact side batt 21 can be made sandwich construction, to wet paper, the content of core sheath composite fibre 41 progressively increases, and can further improve flatness and mar proof thus from the squeezing side of l Water Paper contact side batt 21.
Fig. 2 has shown the embodiment when l Water Paper contact side batt 21 is the double-layer structure of the 1st layer of 21a and the 2nd layer of 21b, and the content of the core sheath composite fibre 41 of the 1st layer of 21a is more than the 2nd layer of 21b.
Adopt such structure, can make l Water Paper contact side batt 21 become again moist and the very balanced structure of water squeezing.That is to say, it is fine and close that the 1st layer of more 21a of the content of core sheath composite fibre 41 becomes, so can keep rewetting and flatness, and the compactness of less the 1st layer of 21b of the content of core sheath composite fibre 41 is low, help to improve compressibility, thereby strengthen water squeezing, l Water Paper contact side batt 21 just can obtain moist and water squeezing simultaneously again like this.So l Water Paper contact side batt 21 is compared during with individual layer, has kept flatness and depilation, abrasiveness, simultaneously because compacted zone is a double-layer structure, thus have again moist further improvement, and the also improved synergy of water squeezing.
In contrast, if from the squeezing side direction wet paper of l Water Paper contact side batt 21, the content of core sheath composite fibre 41 gradually reduces, and then becomes and the said structure opposite configuration, therefore compare flatness and depilation, abrasiveness and rewetting variation with l Water Paper contact side batt 21 during for individual layer.
In addition, the l Water Paper contact side batt 21 among Fig. 2 has been made two-layer, but also can be by constituting more than 3 layers.
In addition, the core of core sheath composite fibre 41 and the volume ratio of sheath portion have no particular limits, and can be preferably 1:1 in the scope of 5:1～1:5.
In addition, as the nylon fiber 42 that constitutes l Water Paper contact side batt 21, squeezing side batt 23, and with the nylon fiber 42 of core sheath composite fibre 41 blending, nylon 6, nylon 66, nylon 46, NYLON610, nylon 612 etc. all are fit to.
For matrix 30, as depicted in figs. 1 and 2, organizine 31 (silk of the CMD direction of woollen blanket) and tram 32 (silk of MD direction similarly) are made into by monofilament, thus obtained weaving cotton cloth can preferably be used, but as the weaving textile form, also can use (2/1,1/2), (3/1,1/3), two-fold such as (5/1,1/5) braiding or triple braiding, perhaps stacked braidings such as (rearranges knits+two-fold braiding), (two-fold braiding+two-fold weaves).The thickness of monofilament is diameter 0.1mm～0.6mm, and the thread density of braiding can use 10～100/25mm.
In addition, the invention is not restricted to this, the formation that can suitably adopt silk material with silk material and the CMD direction of MD direction not weave and pile up, the shoestring that film, knitting, thin shoestring are wound in the broad that spirality obtains constitute or the like various formations.In addition, the raw material of matrix 30 also can use natural fabrics such as wool, synthetic fiber such as the polyester that mar proof, fatigue durability, tensile properties, soil resistance etc. are good or nylon 6, nylon 66.
In addition, the fiber number of core sheath composite fibre 41, the pick felt that uses for the press sections leading portion at paper machine can be 15～25 dtexs (dtex) scope, and can be 10～20 dtexs (dtex) scope for second press felt and the 3rd press felt that use in the press sections stage casing of paper machine.
In addition, in the 4th press felt and shoe press woollen blanket that the press sections back segment of paper machine uses, can use 5～20 dtexs (dtex) scope.
In addition, the fiber number of nylon fiber 42 in the wet paper batt 20 of the pick felt that the press sections leading portion of paper machine uses, can be used 10～25 dtexs (dtex) scope, can use 15～25 dtexs (dtex) scope in squeezing side batt 23.
In addition, in second press felt that uses in the press sections stage casing of paper machine and the wet paper batt 20 of the 3rd press felt, the fiber number of 10～15 dtexs (dtex) scope can be used, in squeezing side batt 23, the fiber number of 10～20 dtexs (dtex) scope can be used.
In the 4th press felt and the wet paper batt 32 in the shoe press woollen blanket that the press sections back segment of paper machine uses, can use the fiber number of 5～15 dtexs (dtex) scope, in squeezing side batt 23, can use the fiber number of 5～20 dtexs (dtex) scope.
Embodiment
By following examples, specify press felt for papermaking of the present invention.But the present invention is not limited to these embodiment.
The preparation of core sheath composite fibre;
220 ℃ of fusing points) and copolymer nylon 6/12 (caprolactam/lauric lactam: 140 ℃ of fusing points) prepare refining nylon 6 (caprolactam:, drop into respectively in the independent extruder that has the devolatilization mouth, in extruder, remove volatile materials then, the core nylon 6 and the sheath material copolymer nylon 6/12 of fusion is quantitative with quantitative gear pump with molten condition, supply with each core sheath composite spinning nozzle.Through core sheath composite spinning nozzle, the core sheath composite fibre that is spun into silk cools off in air duct, refuels simultaneously, reels with natural draw ratio, and drawn is cut to fixed length after crispaturaing and processing then, makes the staple fibre of core sheath composite fibre.
Can use " MODEL-EMF that the accurate industry of Japan is made " device for spinning when in addition, making core sheath composite fibre.In this device, can use extruder and Nelson formula multi-step tension machine and up-coiler.
The staple fibre that has prepared two kinds of core sheath composite fibres in the present embodiment, core uses high molecular weight nylon 6, and (absolute viscosity 25 ℃ the time is 85mPas, fusing point is 220 ℃) and middle molecular weight nylon 6 (absolute viscosity 25 ℃ the time is 70mPas, fusing point is 220 ℃) two kinds, the sheath material uses copolymer nylon 6/12 (140 ℃ of fusing points), and the volume ratio of core and sheath portion is 1:1.Use high molecular weight nylon 6 as core be composite fibre A, molecular weight nylon 6 is composite fibre B as core in using.
In addition, when the relative viscosity (η r) that the numerical value of the absolute viscosity 85mPas of present embodiment and absolute viscosity 70mPas is measured with general mensuration means (Ubbelohde viscosimetry) is represented, η r=4.5 and 3.0.In addition, absolute viscosity 80mPas is equivalent to η r=4.0.
The preparation of press felt for papermaking;
A lot of conditions are identical in embodiment, the comparative example, and all the basic comprising of woollen blanket is as follows.
Matrix: the A[that weaves cotton cloth gets the nylon monofilament of 240dtex, per 2 sth. made by twisting are (twist with the fingers down) together, and per 2 sth. made by twisting of should twisting thread down (are gone up and twisted with the fingers) together, and twisting thread of obtaining is made into as a material of a material of MD direction and CMD direction, the braiding of (3/1,1/3) two-fold]: Gram Mass 300g/m
2
: the B[that weaves cotton cloth is made into the braiding of (3/1,1/3) two-fold with the nylon monofilament of 1100dtex as the silk material of the silk material of MD direction and CMD direction]: Gram Mass 300g/m
2
Batt: the basic weight of (nylon 6 fiber of 17dtex, and the composite fibre A of 17dtex or the staple fibre of B) is 120g/m in the l Water Paper contact side batt (the 1st layer) (in table 1 with " l Water Paper contact fibrage " expression)
2
: the basic weight of (nylon 6 fiber of 17dtex, and the staple fibre of the composite fibre A of 17dtex) is 120g/m in the l Water Paper contact side batt (the 2nd layer)
2
: the basic weight of (nylon 6 fiber of 17dtex, and the staple fibre of the composite fibre A of 17dtex) is 120g/m in the matrix side batt
2
: the basic weight of (staple fibre of the nylon 6 fiber of 17dtex) is 100g/m in the squeezing side batt
2
Thorn pin density: 700 times/cm
2
Hot pressing is pressed: with the woollen blanket behind the pricker with the speed of 5m/min repeatedly 5 times by 1 pair of hot rolling smooth roll (roll temperature is 160 ℃, and squeeze pressure is 30kg/cm), acquisition has 0.5g/cm
3Woollen blanket with upper density.
The formation of the woollen blanket of embodiment 1～8 and comparative example 1～6 is shown in table 1 and the table 2.
(table 1)
| Embodiment | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | |
| L Water Paper contact fibrage (the 1st layer) | Compound A 60% | Compound A 40 | Compound A | 10% | Compound A 60% | Compound A 40% | Compound A 70% | Compound A 70% | Compound A 60% |
| L Water Paper contact fibrage (the 2nd layer) | Nylon | Nylon | Nylon | Compound A 40 | Compound A | 10% | Nylon | Compound A 40% | Nylon |
| The 1st batt | Nylon | Nylon | Nylon | Nylon | Nylon | Nylon | Nylon | Nylon | |
| Basic unit | The A of basic unit | The A of basic unit | The A of basic unit | The A of basic unit | The A of basic unit | The A of basic unit | The A of basic unit | Matrix B | |
| The 2nd batt | Nylon | Nylon | Nylon | Nylon | Nylon | Nylon | Nylon | Nylon |
(table 2)
| Comparative example | 1 | 2 | 3 | 4 | 5 | 6 | |
| L Water Paper contact fibrage (the 1st layer) | Nylon | Nylon | Compound A 5 | Compound A | 10% | Compound B 40% | Nylon |
| L Water Paper contact fibrage (the 2nd layer) | Nylon | Nylon | Compound A 5% | Compound A 40% | Nylon | Nylon | |
| The 1st batt | Compound A 60% | Nylon | Nylon | Nylon | Nylon | Nylon | |
| Basic unit | The A of basic unit | The A of basic unit | The A of basic unit | The A of basic unit | The A of basic unit | Matrix B | |
| The 2nd batt | Nylon | Nylon | Nylon | Nylon | Nylon | Nylon |
Use the press felt for papermaking of the foregoing description and comparative example,, carry out rewetting phenomenon and water squeezing evaluation and compression and fatigue resisting, anti-depilation and abrasiveness, flatness evaluation by following condition, method.
Rewetting phenomenon and water squeezing evaluation;
Adopt Fig. 3 and device shown in Figure 4 to carry out rewetting phenomenon and water squeezing evaluation.
At first, in Fig. 3 and device shown in Figure 4, P is pressure roller among the figure, and 110 is the upside woollen blanket, and 10 is the downside woollen blanket, and SC is a suction tube, and SN is the drip washing nozzle.
In addition, the foregoing description and comparative example all use as downside woollen blanket 10 in each device.At this moment, as the upside woollen blanket, use and the identical press felt of woollen blanket shown in the comparative example 2.
In addition, in Fig. 3, device shown in Figure 4, the gait of march of woollen blanket is 800m/min, and squeeze pressure is 80kg/cm.
In device shown in Figure 3, the l Water Paper that breaks away from nip pressure is placed on the downside woollen blanket 10 and transports.Therefore, break away from nip pressure after, in the humidity that the loading and the transporting position (squeezing outlet 1) of downside woollen blanket 10 are measured l Water Paper, can obtain to take place the moisture data of the l Water Paper of rewetting phenomenon.
In contrast, in device shown in Figure 4, the area that downside woollen blanket 10 contacts with pressure roller is big, and the time of the l Water Paper of disengaging nip pressure and woollen blanket 10,110 contacts is very short.At this moment, in the position that just breaks away from nip pressure (squeezing outlet 2) measure the humidity of l Water Paper, obtain how not take place the moisture data of the l Water Paper of rewetting phenomenon.
At this, try to achieve the moisture data that obtain with the device of Fig. 3 and, carry out rewetting phenomenon and water squeezing evaluation with the corresponding data of the device acquisition of Fig. 4.When carrying out the water squeezing evaluation, for the device of Fig. 3 in the squeezing outlet 1 moisture data that record, moisture 49% is being evaluated as water squeezing " very " with next more than 48%.If moisture then is being evaluated as water squeezing " bad " more than 49%.Carry out the rewetting phenomenon when estimating, rewetting phenomenon (estimating " very ") does not take place if both differences less than 0.5%, are then thought in the difference of the corresponding data that the moisture data that obtain for the device with Fig. 3 and the device with Fig. 4 obtain.On the other hand,, then think a little rewetting phenomenon (estimate " still can ") takes place, if rewetting phenomenon (evaluation " bad ") takes place then thinking more than 1.0% if both difference is 0.5% or more and less than 1.0%.
Repeated compression test repeatedly;
120kg/cm is provided
25Hz pulse loading, repeat 300,000 times, carry out repeated compression test.Compression fatigue represents with the ratio of (test back density/density when making), is chosen as " excellent " less than 1.30 o'clock, is chosen as " very " more than 1.30 below 1.39, is chosen as " bad " more than 1.40.
Taber depilation, wear test;
Based on JIS1023-1992, adopt the Taber abrasiometer, measure the fibre weight that comes off from felt for papermaking, carry out anti-depilation and abrasiveness evaluation thus.On the turntable of rotation, place discoid test film, on test film, use big resistance rotation roller again, measure the amount of coming off (depilation, wear extent) of fiber.(loading 0.5kg, wheel disc CS-17, rotation number 3000 times, the mg of unit)
Depilation, wear extent are chosen as " very " below 40mg, surpass 40mg and be chosen as " bad ".
Surface roughness measurement;
Before Taber depilation, wear test, the woollen blanket of making is measured 10 mean roughness Rz (μ m) (JIS-B0601), carry out the flatness evaluation on woollen blanket surface.
Surface roughness is chosen as " excellent " less than 60 μ m, is chosen as " very " below the above 99 μ m of 60 μ m, is chosen as " bad " more than the 100 μ m.
The measurement result and the evaluation of each test are shown in the table 3.
(table 3)
Shown in the embodiment 1～8 of table 3, confirmed that press felt for papermaking of the present invention when suppressing the rewetting phenomenon, also balancedly possesses compression and fatigue resisting, anti-depilation and performances such as abrasiveness, flatness and water squeezing.
Discovery is in the comparative example 1 that matrix side batt is made of core sheath composite fibre, and compression and fatigue resisting and anti-depilation and abrasiveness are good, but the flatness on woollen blanket surface is poor.
Also find at the content of the core sheath composite fibre of l Water Paper contact side batt less than 25% embodiment 3, comparative example 3, and do not contain in the comparative example 2 of core sheath fiber,, can not suppress the rewetting phenomenon though have the compression and fatigue resisting performance.
In addition, in the squeezing side direction wet paper from l Water Paper contact side batt, in the comparative example 4 that the content of core sheath composite fibre gradually reduces, though have compression and fatigue resisting and rewetting performance, flatness is poor.Reason is considered to, and has constituted the woollen blanket surface because contain the 2nd layer of l Water Paper contact side batt of core sheath composite fibre still less.
Find that also the comparative example 5 of molecular weight nylon is compared compression and fatigue resisting, anti-depilation and abrasiveness variation with the embodiment 1 that uses high molecular weight nylon in using in the core composition of core sheath composite fibre.
Confirm that also because embodiment 8 uses by weaving cotton cloth as matrix B that monofilament is made into, compare so use by the monofilament embodiment that weaves cotton cloth 1 that is made into that twists thread with matrix A, the moisture (1 and 2) that squeezes the exit is all lower, the water squeezing excellence in basic unit.
Utilize possibility on the industry
In the present invention, l Water Paper contact side batt becomes barrier, can suppress the rewetting phenomenon, the viscosity of the core composition by making core sheath composite fibre is large, namely use high molecular weight nylon, make anti-depilation and abrasiveness and the compression and fatigue resisting raising of woollen blanket, the result has obtained following effect: the life-span of woollen blanket (life) prolongs, so the replacing number of times of woollen blanket reduces; Reduce owing to be attached to the situation of l Water Paper because of the hair that loses hair or feathers, wearing and tearing come off, so the paper products quality improving; Kept flatness of l Water Paper contact-making surface etc.
And then, l Water Paper contact side batt is made of core sheath composite fibre, the matrix side batt that forms on the wet paper surface of matrix is made of the nylon layer that does not contain core sheath composite fibre, balancedly possess thus flatness, anti-depilation and abrasiveness, compression and fatigue resisting and water squeezing, will be by weaving cotton cloth for basic unit that monofilament is made into, the water penetration of weaving cotton cloth improves, so can provide water squeezing good woollen blanket.
Claims (4)
1. press felt for papermaking by matrix and comprise the wet paper layer and the batt of squeezing side layer constitutes, is characterized in that:
Aforementioned wet paper layer comprises l Water Paper contact side batt and matrix side batt,
Aforementioned l Water Paper contact side batt contains the core sheath composite fibre that is made of core composition and sheath composition, and described core composition is made up of the high molecular weight nylon of absolute viscosity more than 80mPas, and described sheath composition is made up of the low-melting nylon than this core composition,
Aforementioned substrates side batt is made up of the nylon layer that does not contain aforementioned core sheath composite fibre.
2. the press felt for papermaking of claim 1, the content of the aforementioned core sheath composite fibre in the wherein aforementioned l Water Paper contact side batt is 25%～75%.
3. claim 1 or 2 press felt for papermaking wherein, are made sandwich construction with aforementioned l Water Paper contact side batt, and to wet paper, the content of aforementioned core sheath composite fibre progressively increases from the squeezing side of aforementioned l Water Paper contact side batt.
4. the press felt for papermaking of one of claim 1 to 3, wherein, aforementioned substrates is weaving cotton cloth of being made into by the organizine of monofilament and tram.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006066678A JP4157136B2 (en) | 2006-02-14 | 2006-02-14 | Press felt for papermaking |
| JP066678/2006 | 2006-02-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101384770A true CN101384770A (en) | 2009-03-11 |
Family
ID=38371393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007800050653A Pending CN101384770A (en) | 2006-02-14 | 2007-01-31 | Press felt for papermaking |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US20100163202A1 (en) |
| EP (1) | EP1985752A4 (en) |
| JP (1) | JP4157136B2 (en) |
| KR (1) | KR20080100418A (en) |
| CN (1) | CN101384770A (en) |
| AU (1) | AU2007216016A1 (en) |
| BR (1) | BRPI0707822A2 (en) |
| CA (1) | CA2642541A1 (en) |
| TW (1) | TW200736462A (en) |
| WO (1) | WO2007094207A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107287964A (en) * | 2017-06-13 | 2017-10-24 | 太仓市宇航造纸机械厂 | A kind of composite papermaking felt structure |
| CN110254015A (en) * | 2019-06-28 | 2019-09-20 | 四川环龙技术织物有限公司 | A kind of preparation method applied to high-speed vacuum cylinder mould machine woollen blanket |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5148973B2 (en) * | 2007-11-20 | 2013-02-20 | イチカワ株式会社 | Felt for papermaking |
| EP2141283A3 (en) * | 2008-07-02 | 2012-04-25 | Voith Patent GmbH | Drying belt for a condensation drying device |
| JP5148401B2 (en) * | 2008-07-25 | 2013-02-20 | 日本フエルト株式会社 | Papermaking felt and method for producing the same |
| JP5571403B2 (en) * | 2010-02-09 | 2014-08-13 | 日本フエルト株式会社 | Papermaking felt and method for producing the same |
| JP5571404B2 (en) * | 2010-02-09 | 2014-08-13 | 日本フエルト株式会社 | Papermaking felt and manufacturing method thereof, papermaking belt and manufacturing method thereof |
| CN107858853B (en) * | 2017-10-31 | 2019-10-01 | 宿迁市神龙家纺有限公司 | A kind of water suction felt and preparation method thereof |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03104995A (en) * | 1989-09-19 | 1991-05-01 | Daiwabo Co Ltd | Needle felt for paper making |
| US5236652A (en) * | 1992-02-11 | 1993-08-17 | E. I. Du Pont De Nemours And Company | Process for making polyamide fiber useful as staple for papermaking machine felt |
| JP3266378B2 (en) * | 1993-09-13 | 2002-03-18 | 日本フエルト株式会社 | Needle felt for papermaking |
| JP3045923B2 (en) * | 1994-03-28 | 2000-05-29 | 市川毛織株式会社 | Felt for papermaking |
| US5549967A (en) * | 1995-05-04 | 1996-08-27 | Huyck Licensco, Inc. | Papermakers' press fabric with increased contact area |
| JP3440442B2 (en) * | 1998-01-06 | 2003-08-25 | 市川毛織株式会社 | Felt for papermaking and method for producing the same |
| US6235390B1 (en) | 1998-11-03 | 2001-05-22 | E. I. Du Pont De Nemours And Company | High RV filaments, and apparatus and processes for making high RV flake and the filaments |
| DE19854732C1 (en) | 1998-11-26 | 2000-09-14 | Inventa Ag | Core-jacket bicomponent fiber and its use |
| JP2000170087A (en) * | 1998-12-08 | 2000-06-20 | Ichikawa Woolen Textile Co Ltd | Press felt for paper making |
| JP2000170086A (en) | 1998-12-08 | 2000-06-20 | Ichikawa Woolen Textile Co Ltd | Press felt for paper making |
| JP4102644B2 (en) | 2002-10-24 | 2008-06-18 | イチカワ株式会社 | Press felt for paper making and press machine for paper machine |
| JP4939399B2 (en) * | 2004-04-08 | 2012-05-23 | エムス−ヒエミー アーゲー | Press felt for papermaking machine, manufacturing method and manufacturing apparatus for said felt |
| JP4454408B2 (en) * | 2004-06-25 | 2010-04-21 | イチカワ株式会社 | Felt for papermaking |
| JP4875895B2 (en) * | 2006-01-06 | 2012-02-15 | イチカワ株式会社 | Press felt for papermaking |
-
2006
- 2006-02-14 JP JP2006066678A patent/JP4157136B2/en active Active
-
2007
- 2007-01-31 WO PCT/JP2007/052067 patent/WO2007094207A1/en active Application Filing
- 2007-01-31 CA CA002642541A patent/CA2642541A1/en not_active Abandoned
- 2007-01-31 BR BRPI0707822-6A patent/BRPI0707822A2/en not_active IP Right Cessation
- 2007-01-31 CN CNA2007800050653A patent/CN101384770A/en active Pending
- 2007-01-31 EP EP07708116A patent/EP1985752A4/en not_active Ceased
- 2007-01-31 US US12/223,834 patent/US20100163202A1/en not_active Abandoned
- 2007-01-31 KR KR1020087015589A patent/KR20080100418A/en not_active Application Discontinuation
- 2007-01-31 AU AU2007216016A patent/AU2007216016A1/en not_active Abandoned
- 2007-02-14 TW TW096105376A patent/TW200736462A/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107287964A (en) * | 2017-06-13 | 2017-10-24 | 太仓市宇航造纸机械厂 | A kind of composite papermaking felt structure |
| CN110254015A (en) * | 2019-06-28 | 2019-09-20 | 四川环龙技术织物有限公司 | A kind of preparation method applied to high-speed vacuum cylinder mould machine woollen blanket |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4157136B2 (en) | 2008-09-24 |
| JP2007217848A (en) | 2007-08-30 |
| CA2642541A1 (en) | 2007-08-23 |
| BRPI0707822A2 (en) | 2011-05-10 |
| US20100163202A1 (en) | 2010-07-01 |
| KR20080100418A (en) | 2008-11-18 |
| AU2007216016A1 (en) | 2007-08-23 |
| EP1985752A4 (en) | 2009-03-25 |
| TW200736462A (en) | 2007-10-01 |
| EP1985752A1 (en) | 2008-10-29 |
| WO2007094207A1 (en) | 2007-08-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101384770A (en) | Press felt for papermaking | |
| CN101356313A (en) | Press felt for papermaking | |
| JP4976740B2 (en) | Seam felt for papermaking | |
| CN1318692C (en) | Papermaking press felt and press device for paper machine | |
| JP4565625B2 (en) | Papermaking press felt and papermaking press | |
| CN101641476B (en) | Press felt for papermaking | |
| WO2010098110A1 (en) | Papermaking felt | |
| EP1102890A1 (en) | Method of manufacturing press felt, and press felt | |
| JP4958491B2 (en) | Felt for papermaking | |
| JP4213733B2 (en) | Method for producing press felt for papermaking | |
| JP5571886B2 (en) | Paper making tools | |
| JP5542321B2 (en) | Felt for paper machine | |
| JP2022113507A (en) | Manufacturing method of felt for papermaking and felt for papermaking manufactured by the same | |
| MX2008010417A (en) | Press felt for papermaking |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090311 |