CA2616527A1 - Seamed felt for papermaking and process for producing the same - Google Patents
Seamed felt for papermaking and process for producing the same Download PDFInfo
- Publication number
- CA2616527A1 CA2616527A1 CA002616527A CA2616527A CA2616527A1 CA 2616527 A1 CA2616527 A1 CA 2616527A1 CA 002616527 A CA002616527 A CA 002616527A CA 2616527 A CA2616527 A CA 2616527A CA 2616527 A1 CA2616527 A1 CA 2616527A1
- Authority
- CA
- Canada
- Prior art keywords
- seam
- nonwoven fabric
- batt layer
- felt
- papermaking
- 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.)
- Abandoned
Links
- 238000000034 method Methods 0.000 title claims description 22
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 37
- 239000000835 fiber Substances 0.000 claims abstract description 16
- 238000004080 punching Methods 0.000 claims abstract description 15
- 239000004744 fabric Substances 0.000 claims description 29
- 239000012634 fragment Substances 0.000 claims description 20
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- 238000009941 weaving Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 3
- 230000035699 permeability Effects 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000000704 physical effect Effects 0.000 description 6
- 230000035617 depilation Effects 0.000 description 4
- 238000007731 hot pressing Methods 0.000 description 4
- 238000004826 seaming Methods 0.000 description 4
- 229920000728 polyester Polymers 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 239000002759 woven fabric Substances 0.000 description 2
- 229920003233 aromatic nylon Polymers 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 238000001881 scanning electron acoustic microscopy Methods 0.000 description 1
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
- D21F7/10—Seams thereof
Landscapes
- Paper (AREA)
Abstract
A seamed felt (10c) for papermaking which comprises a wet-paper-side batt layer (30c) and has a seam part (12). Those parts of the wet-paper-side batt layer (30c) which are located around the seam part (12) contain small pieces (40a) of a sheet-form nonwoven fabric destroyed by needle punching, the small pieces (40a) being dispersed within the range of the thickness of the batt layer. At least part of the fibers of the batt layer pass through holes of the small nonwoven-fabric pieces (40a), and the small nonwoven-fabric pieces (40a) are thermally fusion-bonded to fibers of the batt layer.
Description
SEAM FELT FOR PAPERMAKING AND MANUFACTURING METHOD THEREOF
FIELD OF THE INVENTION
The present invention relates to a seam felt for papermaking and a manufacturing method thereof.
BACKGROUND ART
In recent years, mainstream papermaking apparatuses are the ones that operate at high speed and high pressure.
It is desirable for a press felt for papermaking to have high permeability to liquid. Therefore, the mainstream press felt is one wherein the fabric structure of the basic part is made of monofilament, so that high permeability is achieved.
A conventional press fabric that can be seamed on a machine (for example refer to WO02/35000) comprises a batt and a strip made of flow-resistant material, placed on or adjacent to the seam region of a papermaker's fabric, so that the permeabilities of the seam region of the press fabric to air and water are substantially identical to those of the other regions.
Figure 6 is a machine direction sectional view of a conventional press fabric 101.
Press fabric 10' comprises a base fabric 14', which is woven from monofilament yarns, and seam regions 12, which join the base fabric 14' into endless form on the machine.
The base fabric 14' is a woven fabric comprising machine direction weft yarns 16' and cross-machine direction warp yarns 22' The machine direction yarns 16' form seaming loops 18'.
-1- ~
Said seaming loops 18' are interdigitated to create a passage for a pintle 20'. The seaming loops 18' and the pintle 20' are combined to join the base fabric 14'.
A strip 24' is disposed over the seam region 12', straddling it by amount in the range from 0.5-2.0 inches (1.27-5.08cm) on its top side. The strip 24' is a ribbon of woven fabric, nonwoven fabric or polymeric film, and is punched into the base fabric 14' by needling. A batt 26, made of staple fiber, is driven into the base fabric 14' at least from one side thereof by needling or other means.
Batt 26 is cleared away from the seaming loops 18' on the bottom side of the base fabric 14 to form a gap 28'.
A slit 30' is cut obliquely through the batt 26' and strip 24'. The strip 24' provides a press fabric 10' wherein the permeabilities to air and water of the seam region 12' are not inferior to those of other regions.
DISCLOSURE OF THE INVENTION
In the above-mentioned press fabric with a slit thereon, it was necessary to use a strip havi.ng suitable weight for maintaining or improving the bondability of the batt placed on the seam region, in order to prevent depilation. Inevitably, it was difficult to equalize the permeabilities to air and water, and the physical property of the felt (compressibility, permeability, and fouling component accumulation) in the seam region with those of other regions.
In a press fabric, since the texture of the wet paper web adjacent to the seam region is altered in the papermaking process, if permeability to air and water, and the physical properties of the felt differ between the seam region and other regions, there is a danger that the quality of a wet paper web will fail, or the wet paper web will be torn. Moreover, there is a problem that the durability and the quality of a seam felt are spoiled.
Thus, the object of the present invention is to provide a seam felt for papermaking and a mariufacturing method thereof, wherein the depilation-resistant property of a flap is improved, while the physical properties of the felt in the seam region are kept identical tc> those in other regions.
The present invention solves the above problems by providing a seam felt for papermaking having a wet paper web side batt layer and a seam region, characterized in that fragments of a sheet-shaped nonwoven fabric, fractured by needle punching, are dispersed in a region of said wet paper web side batt layer adjacent said seam region within the depthwise range of said batt layer, at least a part of the fibers of said batt layer penetrates holes of said fragments of nonwoven fabric, and said fragments of nonwoven fabric melt by heat and adhere to fibers of said batt layer.
The invention also solves the above problems by providing a manufacturing method for a seam felt for papermaking, wherein a base fabric having seam loops is woven by a weaving machine, characterized in that, when a batt layer is implanted into both sides of said base fabric to make a seam felt for papermaking in a needling process, a sheet-shaped nonwoven fabric is disposed in a position adjacent said seam loops, said sheet-shaped nonwoven fabric is fractured by needle punching, fragments of nonwoven fabric are dispersed into said batt layer, a flap is formed by cutting said batt layer at the region of said seam loops in a widthwise direction, and said fragments of nonwoven fabric are melted by heating.
According to the present invention, fragments of sheet-shaped nonwoven fabric are dispersed in a depthwise direction of a felt, so that the permeabilities to air and water and the physical properties of the felt in the seam region approximate those of other regions.
Moreover, according to the present invention, depilation or falling of f of batt fibers of a flap can be effectively prevented. As a result, the present invention can provide a seam felt for papermaking which has good durability and which can manufacture a wet paper web of high quality with less danger of tearing in the papermaking process.
BRIEF DESCRIPTION OF DRAWINGS
Figure 1 is a machine direction sectional view of a seam felt for papermaking before the needle punching process.
Figure 2 is a machine direction sectional view of a seam felt for papermaking after the needle punching process, fragments of nonwoven fabric being enlarged.
Figure 3 is an enlarged perspective view showing the forms of fragments of nonwoven fabric and batt fiber after the needle punching process.
Figure 4 is a machine direction sectional view of a seam felt for papermaking wherein a slit is formed after the needle punching process, fragments of nonwoven fabric being enlarged.
FIELD OF THE INVENTION
The present invention relates to a seam felt for papermaking and a manufacturing method thereof.
BACKGROUND ART
In recent years, mainstream papermaking apparatuses are the ones that operate at high speed and high pressure.
It is desirable for a press felt for papermaking to have high permeability to liquid. Therefore, the mainstream press felt is one wherein the fabric structure of the basic part is made of monofilament, so that high permeability is achieved.
A conventional press fabric that can be seamed on a machine (for example refer to WO02/35000) comprises a batt and a strip made of flow-resistant material, placed on or adjacent to the seam region of a papermaker's fabric, so that the permeabilities of the seam region of the press fabric to air and water are substantially identical to those of the other regions.
Figure 6 is a machine direction sectional view of a conventional press fabric 101.
Press fabric 10' comprises a base fabric 14', which is woven from monofilament yarns, and seam regions 12, which join the base fabric 14' into endless form on the machine.
The base fabric 14' is a woven fabric comprising machine direction weft yarns 16' and cross-machine direction warp yarns 22' The machine direction yarns 16' form seaming loops 18'.
-1- ~
Said seaming loops 18' are interdigitated to create a passage for a pintle 20'. The seaming loops 18' and the pintle 20' are combined to join the base fabric 14'.
A strip 24' is disposed over the seam region 12', straddling it by amount in the range from 0.5-2.0 inches (1.27-5.08cm) on its top side. The strip 24' is a ribbon of woven fabric, nonwoven fabric or polymeric film, and is punched into the base fabric 14' by needling. A batt 26, made of staple fiber, is driven into the base fabric 14' at least from one side thereof by needling or other means.
Batt 26 is cleared away from the seaming loops 18' on the bottom side of the base fabric 14 to form a gap 28'.
A slit 30' is cut obliquely through the batt 26' and strip 24'. The strip 24' provides a press fabric 10' wherein the permeabilities to air and water of the seam region 12' are not inferior to those of other regions.
DISCLOSURE OF THE INVENTION
In the above-mentioned press fabric with a slit thereon, it was necessary to use a strip havi.ng suitable weight for maintaining or improving the bondability of the batt placed on the seam region, in order to prevent depilation. Inevitably, it was difficult to equalize the permeabilities to air and water, and the physical property of the felt (compressibility, permeability, and fouling component accumulation) in the seam region with those of other regions.
In a press fabric, since the texture of the wet paper web adjacent to the seam region is altered in the papermaking process, if permeability to air and water, and the physical properties of the felt differ between the seam region and other regions, there is a danger that the quality of a wet paper web will fail, or the wet paper web will be torn. Moreover, there is a problem that the durability and the quality of a seam felt are spoiled.
Thus, the object of the present invention is to provide a seam felt for papermaking and a mariufacturing method thereof, wherein the depilation-resistant property of a flap is improved, while the physical properties of the felt in the seam region are kept identical tc> those in other regions.
The present invention solves the above problems by providing a seam felt for papermaking having a wet paper web side batt layer and a seam region, characterized in that fragments of a sheet-shaped nonwoven fabric, fractured by needle punching, are dispersed in a region of said wet paper web side batt layer adjacent said seam region within the depthwise range of said batt layer, at least a part of the fibers of said batt layer penetrates holes of said fragments of nonwoven fabric, and said fragments of nonwoven fabric melt by heat and adhere to fibers of said batt layer.
The invention also solves the above problems by providing a manufacturing method for a seam felt for papermaking, wherein a base fabric having seam loops is woven by a weaving machine, characterized in that, when a batt layer is implanted into both sides of said base fabric to make a seam felt for papermaking in a needling process, a sheet-shaped nonwoven fabric is disposed in a position adjacent said seam loops, said sheet-shaped nonwoven fabric is fractured by needle punching, fragments of nonwoven fabric are dispersed into said batt layer, a flap is formed by cutting said batt layer at the region of said seam loops in a widthwise direction, and said fragments of nonwoven fabric are melted by heating.
According to the present invention, fragments of sheet-shaped nonwoven fabric are dispersed in a depthwise direction of a felt, so that the permeabilities to air and water and the physical properties of the felt in the seam region approximate those of other regions.
Moreover, according to the present invention, depilation or falling of f of batt fibers of a flap can be effectively prevented. As a result, the present invention can provide a seam felt for papermaking which has good durability and which can manufacture a wet paper web of high quality with less danger of tearing in the papermaking process.
BRIEF DESCRIPTION OF DRAWINGS
Figure 1 is a machine direction sectional view of a seam felt for papermaking before the needle punching process.
Figure 2 is a machine direction sectional view of a seam felt for papermaking after the needle punching process, fragments of nonwoven fabric being enlarged.
Figure 3 is an enlarged perspective view showing the forms of fragments of nonwoven fabric and batt fiber after the needle punching process.
Figure 4 is a machine direction sectional view of a seam felt for papermaking wherein a slit is formed after the needle punching process, fragments of nonwoven fabric being enlarged.
Figure 5 is a machine direction sectional view of a seam felt for papermaking after a heating process, fragments of nonwoven fabric being enlarged.
Figure 6 is a machine direction sectional view of a conventional press fabric.
BEST MODES FOR CARRYING OUT THE INVENTION
Figure 1 is a machine direction sectional view of a seam felt for papermaking before the needle punching process.
In addition, "machine direction (MD)" is a longitudinal (length) direction toward which a seam felt is conveyed in a papermaking machine; and "cross -machine direction" (CMD) is a latitudinal (width) direction crossing the above direction toward which a seam felt is moved in a papermaking machine.
At first, a weaving process of a base fabric 20 is explained.
A base fabric 20 is produced by weaving longitudinal yarns (machine direction yarns) 22 and latitudinal yarns (cross-machine direction yarns) 24 with ends on a weaving machine.
In a seam region 12 of said base fabric 20, so-called seam loops 23, 23 are formed on said longitudinal yarns 22, 22.
Said seam loops 23, 23 are so arranged as to line up with one another in cross-machine direction. A stick core wire (a pintle wire) 26 is interposed betweeri said seam loops 23, 23 to make said base fabric 20 endless.
In the needling process, which occurs next, a batt layer 30, comprising batt fiber 32, is intertwined by needle punching with both sides of said base fabric 20 to make said seam felt 10 into a papermaker's felt.
In above needle punching process, a single or multi layer sheet-shaped nonwoven fabric 40 is placed in or on the surface of the batt layer 30 at the seam region 12.
Specifically, it is preferable that the sheet-shaped nonwoven fabric 40 be placed on the side of the seam loops 23, 23 toward the side that contacts a wet paper web, in the way that it covers the overall width of the seam felt 10 along the cross-machine direction. Preferably, the length of the sheet-shaped nonwoven fabric 40 in the machine direction is in the range from 1 to 20 cm.
In a seam felt 10a (refer to Figure 2) produced by a needle punching process, the sheet-shaped nor.iwoven fabric 40 is crushed in the vicinity of the seam region 12 to form fragments of nonwoven fabric 40a. As a result, fragments of nonwoven fabric 40a are dispersed about the seam region 12 through almost the entire depth of the batt layer 30a.
Along with dispersion, the batt fiber 32 penetrates holes 41a in the fragments of nonwoven fabric 40a, as shown in Figure 3.
Next, as shown in Figure 4, the core wire 26, which was interposed in the seam loops 23, 23 of the seam felt 10b produced by needle punching process, is pulled out.
Then, in a region above the location of the core wire 26, a slit 11 is formed in a batt layer 30b in the cross-machine direction of the seam felt lOb, the slit extending obliquely toward the base fabric 20.
The reason why the slit 11 is slanted relative to the machine direction by cutting the batt layer 30b diagonally is that it is less likely that marks at the seam region will be transferred to a wet paper web than in the case where the batt layer is cut vertically in the cross-machine direction . On the other hand, a cut il' below the location of the core wire can be vertical.
As shown in figure 4, a triangular section having slit 11 as its hypotenuse serves as a flap f. In this case, the direction of travel of the seam felt lOb on a papermaking machine is from the right to the left in Figure 4.
In a hot pressing process occurring after above-described processes, the core wire 26 is put through the seam loops 23, 23 once again, and the endless seam felt lOb is laid over between a pair of rolls, which are not illustrated. By means of a heat source (not shown) arranged between said pair of rolls and a press roll, the seam felt 10b is hot pressed_ The above hot pressing operation is optional, and sometimes only heating is applied.
As shown in Figure 5, fragments of nonwoven fabric 40a are melted by a hot pressing process, and the melted fragments of nonwoven fabric 40c adhere to the points where the longitudinal yarns 22, the latitudinal yarns 24, and the batt fiber 32 contact one another, and to the regions where the batt fibers 32 contact one another..
Thus, without damaging permeability to air and water, and the physical properties of the seam region 12 (compressibility, permeability, and fouling component accumulation) , the present invention effectively prevents depilation and falling off of batt fibers 32 of flap f.
In addition, by pulling out the core wire 26 from the seam loops 23, 23 of the endless seam felt 10c after the hot pressing process, the seam felt lOc can be separated into a form with ends. Thus, the seam felt lOc can be packaged and shipped in rolled condition.
Therefore, when applying in a papermaking machine, after one end of a seam felt 10c having ends is put into the machine, and the seam felt lOc surrounds rolls of the papermaking machine, by engaging the seam loops 23 at one end with the seam loops 23 at the other end, interposing the core wire 26, and connecting seam felt lOc at the seam region 12, the seam felt lOc can be rejoined into an endless form on the machine.
Preferably, the sheet-shaped nonwoven fabric 40 of the present invention is a sheet-shaped fiber assembly made of spunbond, melt blown or spunlace filament or staple fiber.
For good dispersion of the sheet-shaped nonwoven fabric 40 in the needle punching process, it. is preferable that the sheet-shaped nonwoven fabric 40 be relatively lightweight. It is therefore preferable to put in place a plurality of sheet-shaped nonwoven fabrics, the basis weight or areal weight of each of which is about 12g/mZ.
The preferable materials for the sheet-shaped nonwoven fabric 40 are copolymerized nylon, the fusing point of which is in the range from 120 to 180 degrees Celsius, and copolymerized polyester or polyolefin, i.e., materials that have a lower fusing point than the materials of the base fabric 20 and the batt layer 30, such as nylon, polyester, aromatic nylon, polyester or polyether-ester.
INDUSTRIAL APPLICABILITY
The present invention is able to make the permeabilities to air and water, and the physical properties of the felt in the seam region approximate those of other regions. Moreover, the present invention can provide a seam felt for papermaking which has good durability and which can manufacture a wet paper web of high quality with less danger of tearing in the papermaking process.
Figure 6 is a machine direction sectional view of a conventional press fabric.
BEST MODES FOR CARRYING OUT THE INVENTION
Figure 1 is a machine direction sectional view of a seam felt for papermaking before the needle punching process.
In addition, "machine direction (MD)" is a longitudinal (length) direction toward which a seam felt is conveyed in a papermaking machine; and "cross -machine direction" (CMD) is a latitudinal (width) direction crossing the above direction toward which a seam felt is moved in a papermaking machine.
At first, a weaving process of a base fabric 20 is explained.
A base fabric 20 is produced by weaving longitudinal yarns (machine direction yarns) 22 and latitudinal yarns (cross-machine direction yarns) 24 with ends on a weaving machine.
In a seam region 12 of said base fabric 20, so-called seam loops 23, 23 are formed on said longitudinal yarns 22, 22.
Said seam loops 23, 23 are so arranged as to line up with one another in cross-machine direction. A stick core wire (a pintle wire) 26 is interposed betweeri said seam loops 23, 23 to make said base fabric 20 endless.
In the needling process, which occurs next, a batt layer 30, comprising batt fiber 32, is intertwined by needle punching with both sides of said base fabric 20 to make said seam felt 10 into a papermaker's felt.
In above needle punching process, a single or multi layer sheet-shaped nonwoven fabric 40 is placed in or on the surface of the batt layer 30 at the seam region 12.
Specifically, it is preferable that the sheet-shaped nonwoven fabric 40 be placed on the side of the seam loops 23, 23 toward the side that contacts a wet paper web, in the way that it covers the overall width of the seam felt 10 along the cross-machine direction. Preferably, the length of the sheet-shaped nonwoven fabric 40 in the machine direction is in the range from 1 to 20 cm.
In a seam felt 10a (refer to Figure 2) produced by a needle punching process, the sheet-shaped nor.iwoven fabric 40 is crushed in the vicinity of the seam region 12 to form fragments of nonwoven fabric 40a. As a result, fragments of nonwoven fabric 40a are dispersed about the seam region 12 through almost the entire depth of the batt layer 30a.
Along with dispersion, the batt fiber 32 penetrates holes 41a in the fragments of nonwoven fabric 40a, as shown in Figure 3.
Next, as shown in Figure 4, the core wire 26, which was interposed in the seam loops 23, 23 of the seam felt 10b produced by needle punching process, is pulled out.
Then, in a region above the location of the core wire 26, a slit 11 is formed in a batt layer 30b in the cross-machine direction of the seam felt lOb, the slit extending obliquely toward the base fabric 20.
The reason why the slit 11 is slanted relative to the machine direction by cutting the batt layer 30b diagonally is that it is less likely that marks at the seam region will be transferred to a wet paper web than in the case where the batt layer is cut vertically in the cross-machine direction . On the other hand, a cut il' below the location of the core wire can be vertical.
As shown in figure 4, a triangular section having slit 11 as its hypotenuse serves as a flap f. In this case, the direction of travel of the seam felt lOb on a papermaking machine is from the right to the left in Figure 4.
In a hot pressing process occurring after above-described processes, the core wire 26 is put through the seam loops 23, 23 once again, and the endless seam felt lOb is laid over between a pair of rolls, which are not illustrated. By means of a heat source (not shown) arranged between said pair of rolls and a press roll, the seam felt 10b is hot pressed_ The above hot pressing operation is optional, and sometimes only heating is applied.
As shown in Figure 5, fragments of nonwoven fabric 40a are melted by a hot pressing process, and the melted fragments of nonwoven fabric 40c adhere to the points where the longitudinal yarns 22, the latitudinal yarns 24, and the batt fiber 32 contact one another, and to the regions where the batt fibers 32 contact one another..
Thus, without damaging permeability to air and water, and the physical properties of the seam region 12 (compressibility, permeability, and fouling component accumulation) , the present invention effectively prevents depilation and falling off of batt fibers 32 of flap f.
In addition, by pulling out the core wire 26 from the seam loops 23, 23 of the endless seam felt 10c after the hot pressing process, the seam felt lOc can be separated into a form with ends. Thus, the seam felt lOc can be packaged and shipped in rolled condition.
Therefore, when applying in a papermaking machine, after one end of a seam felt 10c having ends is put into the machine, and the seam felt lOc surrounds rolls of the papermaking machine, by engaging the seam loops 23 at one end with the seam loops 23 at the other end, interposing the core wire 26, and connecting seam felt lOc at the seam region 12, the seam felt lOc can be rejoined into an endless form on the machine.
Preferably, the sheet-shaped nonwoven fabric 40 of the present invention is a sheet-shaped fiber assembly made of spunbond, melt blown or spunlace filament or staple fiber.
For good dispersion of the sheet-shaped nonwoven fabric 40 in the needle punching process, it. is preferable that the sheet-shaped nonwoven fabric 40 be relatively lightweight. It is therefore preferable to put in place a plurality of sheet-shaped nonwoven fabrics, the basis weight or areal weight of each of which is about 12g/mZ.
The preferable materials for the sheet-shaped nonwoven fabric 40 are copolymerized nylon, the fusing point of which is in the range from 120 to 180 degrees Celsius, and copolymerized polyester or polyolefin, i.e., materials that have a lower fusing point than the materials of the base fabric 20 and the batt layer 30, such as nylon, polyester, aromatic nylon, polyester or polyether-ester.
INDUSTRIAL APPLICABILITY
The present invention is able to make the permeabilities to air and water, and the physical properties of the felt in the seam region approximate those of other regions. Moreover, the present invention can provide a seam felt for papermaking which has good durability and which can manufacture a wet paper web of high quality with less danger of tearing in the papermaking process.
Claims (3)
1. A seam felt for papermaking having a wet paper web side batt layer and a seam region, characterized in that:
fragments of a sheet-shaped nonwoven fabric fractured by needle punching are dispersed in a region of said wet paper web side batt layer adjacent to said seam region within the depthwise range of said batt layer;
at least a part of fibers of said batt layer penetrates holes of said fragments of nonwoven fabric; and said fragments of nonwoven fabric melt by heat and adhere to fibers of said batt layer.
fragments of a sheet-shaped nonwoven fabric fractured by needle punching are dispersed in a region of said wet paper web side batt layer adjacent to said seam region within the depthwise range of said batt layer;
at least a part of fibers of said batt layer penetrates holes of said fragments of nonwoven fabric; and said fragments of nonwoven fabric melt by heat and adhere to fibers of said batt layer.
2. A method of manufacturing a seam felt for papermaking, wherein a base fabric having a seam loop is woven by a weaving machine, characterized in that, when a batt layer is implanted into both sides of said base fabric to make a paper making seam felt in a needling process:
a sheet-shaped nonwoven fabric is disposed at a position adjacent said seam loop;
said sheet-shaped nonwoven fabric is fractured by needle punching, and fragments of nonwoven fabric are dispersed into said batt layer;
a flap is formed by cutting said batt layer at the region of said seam loop in a widthwise direction; and and said fragments of nonwoven fabric are melted by heating.
a sheet-shaped nonwoven fabric is disposed at a position adjacent said seam loop;
said sheet-shaped nonwoven fabric is fractured by needle punching, and fragments of nonwoven fabric are dispersed into said batt layer;
a flap is formed by cutting said batt layer at the region of said seam loop in a widthwise direction; and and said fragments of nonwoven fabric are melted by heating.
3. A method of manufacturing a seam felt for papermaking according to claim 2, wherein said sheet-shaped nonwoven fabric is made of a material the fusing point of which is in the range from 120-180 degrees Celsius.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005-213763 | 2005-07-25 | ||
| JP2005213763A JP4921736B2 (en) | 2005-07-25 | 2005-07-25 | Seam felt for papermaking and method for producing the same |
| PCT/JP2006/315064 WO2007013631A1 (en) | 2005-07-25 | 2006-07-24 | Seamed felt for papermaking and process for producing the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2616527A1 true CA2616527A1 (en) | 2007-02-01 |
Family
ID=37683519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002616527A Abandoned CA2616527A1 (en) | 2005-07-25 | 2006-07-24 | Seamed felt for papermaking and process for producing the same |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20090133774A1 (en) |
| EP (1) | EP1918453A4 (en) |
| JP (1) | JP4921736B2 (en) |
| CN (1) | CN101228313A (en) |
| BR (1) | BRPI0613856A2 (en) |
| CA (1) | CA2616527A1 (en) |
| TW (1) | TW200710307A (en) |
| WO (1) | WO2007013631A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5389384B2 (en) * | 2008-06-24 | 2014-01-15 | イチカワ株式会社 | Papermaking felt maintaining flexibility and packaging method thereof |
| JP5539656B2 (en) * | 2009-02-10 | 2014-07-02 | 日本フエルト株式会社 | Press felt for papermaking and method for producing the same |
| JP2012122177A (en) | 2010-12-08 | 2012-06-28 | Ichikawa Co Ltd | Papermaking press felt |
| DE102019134837A1 (en) | 2019-12-18 | 2021-06-24 | Voith Patent Gmbh | Covering |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4357386A (en) * | 1981-11-16 | 1982-11-02 | Albany International Corp. | Papermakers felt and method of manufacture |
| US4571359A (en) * | 1984-12-18 | 1986-02-18 | Albany International Corp. | Papermakers wet-press felt and method of manufacture |
| NZ272169A (en) * | 1994-06-09 | 1997-06-24 | Albany Int Corp | Transfer belt for papermaking machine: seam construction: pintles passed through seaming loops |
| AU2002225981B2 (en) * | 2000-10-23 | 2006-03-09 | Albany International Corp. | Seamed papermaker's fabrics |
| US20070044931A1 (en) * | 2005-08-26 | 2007-03-01 | Voith Patent Gmbh | Process belt with improved on-machine seam |
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2005
- 2005-07-25 JP JP2005213763A patent/JP4921736B2/en active Active
-
2006
- 2006-07-11 TW TW095125214A patent/TW200710307A/en unknown
- 2006-07-24 BR BRPI0613856-0A patent/BRPI0613856A2/en not_active Application Discontinuation
- 2006-07-24 CA CA002616527A patent/CA2616527A1/en not_active Abandoned
- 2006-07-24 US US11/989,250 patent/US20090133774A1/en not_active Abandoned
- 2006-07-24 CN CNA2006800265557A patent/CN101228313A/en active Pending
- 2006-07-24 EP EP06768373A patent/EP1918453A4/en not_active Withdrawn
- 2006-07-24 WO PCT/JP2006/315064 patent/WO2007013631A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| JP4921736B2 (en) | 2012-04-25 |
| EP1918453A4 (en) | 2008-08-27 |
| CN101228313A (en) | 2008-07-23 |
| BRPI0613856A2 (en) | 2011-02-15 |
| WO2007013631A1 (en) | 2007-02-01 |
| TW200710307A (en) | 2007-03-16 |
| US20090133774A1 (en) | 2009-05-28 |
| JP2007031855A (en) | 2007-02-08 |
| EP1918453A1 (en) | 2008-05-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |