CA1260749A - Endless belt - Google Patents
Endless beltInfo
- Publication number
- CA1260749A CA1260749A CA000463664A CA463664A CA1260749A CA 1260749 A CA1260749 A CA 1260749A CA 000463664 A CA000463664 A CA 000463664A CA 463664 A CA463664 A CA 463664A CA 1260749 A CA1260749 A CA 1260749A
- Authority
- CA
- Canada
- Prior art keywords
- yarns
- layer
- base fabric
- belt running
- nylon
- 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.)
- Expired
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F3/00—Press section of machines for making continuous webs of paper
- D21F3/02—Wet presses
- D21F3/0209—Wet presses with extended press nip
- D21F3/0218—Shoe presses
- D21F3/0227—Belts or sleeves therefor
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/0027—Screen-cloths
- D21F1/0036—Multi-layer screen-cloths
Landscapes
- Woven Fabrics (AREA)
- Paper (AREA)
- Belt Conveyors (AREA)
- Control And Other Processes For Unpacking Of Materials (AREA)
- Liquid Crystal (AREA)
- Photographic Processing Devices Using Wet Methods (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
An endless belt for the extended nip press of the press part in the papermaking process, wherein the endless belt is composed of a base fabric and a layer of an elastic material coated on one side thereof, the base fabric being a warp triple layer fabric which is made endless by hollow weaving, and the exposed side of the base fabric having such a structure that the plane formed by connecting the apexes of the winding of the yarns in the belt running direction is at a lower position than that formed by connection the apexes of the winding of the yarns in the direction transversely across the belt running directions.
An endless belt for the extended nip press of the press part in the papermaking process, wherein the endless belt is composed of a base fabric and a layer of an elastic material coated on one side thereof, the base fabric being a warp triple layer fabric which is made endless by hollow weaving, and the exposed side of the base fabric having such a structure that the plane formed by connecting the apexes of the winding of the yarns in the belt running direction is at a lower position than that formed by connection the apexes of the winding of the yarns in the direction transversely across the belt running directions.
Description
~Z6~)74~
The present invention relates to an endless belt and par-ticularly -to the base fabric s-tructure of an endless belt used in the ex-tended nip press (referred to as ~NP hereafter) in the press part of the papermaking process.
In th~ process part of the papermaking process, either a roll press or an ENP iS used, and the latter is becoming popu-lar because of many advantages.
The extended nip press is a dewatering press consisting of a rotating roll and a pressure shoe. ~ewatering is accom-plished by pressing the pressure shoe through the endless bel-t of the ENP in contact with said roll aga.tnst the roll while a web of wet paper sandwiched between two fel-t sheets is passed between them.
Conventional belts for the e~tended nip press have such a structure in which a flat base fabric of multiple layer weave of synthetic fiber is endless joined by fabric seaming technology and a layer of elastic material is formed on one side thereof.
In use, that side of the belt which has the layer of elastic material is in sliding contact with the pressure shoe and the other side of the belt which is the base fabric side exposed, contacts the felt.
Since the conventional belt is made endless by joining the ends of a flat base fabric of multiple layer weave of syn-thetic fiber, it has a disadvantage of forming the ~oint mark on the wet paper. Moreover, the seam is not uniform with other parts in fabric structure and yarn density to decrease the strength of the seam.
In order to increase the strength of the seam, it is necessary to make a structure in which the yarns in the belt run-ning direction (referred to as lengthwise yarns hereinafter) windsufficiently to twine them fully. The structure is provided by a C
~z~
multiple weft weaving fabric in which the lengthwise yarns wind to a large extent throughout the entire belt. However, the yarns in the direction transversely across the belt running direction (referred to as crosswise yarns hereinaf-ter) do not need a high strength. Therefore, it is not necessary for the crosswise yarns to wind in the transverse direction. According to such a struc-ture, the apexes of the winding of the lengthwise yarns project outside the crosswise yarns. This means that the lengthwise yarns come into direct contact with the felt and wear out sooner than the crosswise yarns. In other words, the conventional endless belt formed by seaming a flat base fabric of mul-tiple layer weave has the disadvantage that the yarns which need strength most wear out soon.
This disadvantage would be inevitable even in the case of base fabric of multiple layer weave as disclosed in U.K.
Patent Nos. 2106555~ and 2106557A.
According to the present invention there is provided an endless belt composed of a base fabric and a layer of an elastic material covering one side of the base fabric, wherein the base fabric is of endless and hollow triple layer weave in which the yarns in the belt running direction are disposed in three layers, with the uncovered side thereof having such a structure that the plane formed by connec-ting the apexes of the winding of the yarns in the belt running direction is at a lower position than that formed by connecting the apexes of the winding of the yarns in the direction transversely across the belt running direction, the distance between the plane which is in contact with the apexes of the winding of the yarns in the belt running direction and the plane which is in contact with the apexes of the winding of the yarns in the direction transversely across the belt running directions is 0~11 to 0.33 mm, the yarns in the belt running direction in the layer adjacent to the layer of elastic material are nylon monofilaments or polyester monofilaments 0.25 to 0.6 mm in diameter, the yarns in the belt running direction in the layer
The present invention relates to an endless belt and par-ticularly -to the base fabric s-tructure of an endless belt used in the ex-tended nip press (referred to as ~NP hereafter) in the press part of the papermaking process.
In th~ process part of the papermaking process, either a roll press or an ENP iS used, and the latter is becoming popu-lar because of many advantages.
The extended nip press is a dewatering press consisting of a rotating roll and a pressure shoe. ~ewatering is accom-plished by pressing the pressure shoe through the endless bel-t of the ENP in contact with said roll aga.tnst the roll while a web of wet paper sandwiched between two fel-t sheets is passed between them.
Conventional belts for the e~tended nip press have such a structure in which a flat base fabric of multiple layer weave of synthetic fiber is endless joined by fabric seaming technology and a layer of elastic material is formed on one side thereof.
In use, that side of the belt which has the layer of elastic material is in sliding contact with the pressure shoe and the other side of the belt which is the base fabric side exposed, contacts the felt.
Since the conventional belt is made endless by joining the ends of a flat base fabric of multiple layer weave of syn-thetic fiber, it has a disadvantage of forming the ~oint mark on the wet paper. Moreover, the seam is not uniform with other parts in fabric structure and yarn density to decrease the strength of the seam.
In order to increase the strength of the seam, it is necessary to make a structure in which the yarns in the belt run-ning direction (referred to as lengthwise yarns hereinafter) windsufficiently to twine them fully. The structure is provided by a C
~z~
multiple weft weaving fabric in which the lengthwise yarns wind to a large extent throughout the entire belt. However, the yarns in the direction transversely across the belt running direction (referred to as crosswise yarns hereinaf-ter) do not need a high strength. Therefore, it is not necessary for the crosswise yarns to wind in the transverse direction. According to such a struc-ture, the apexes of the winding of the lengthwise yarns project outside the crosswise yarns. This means that the lengthwise yarns come into direct contact with the felt and wear out sooner than the crosswise yarns. In other words, the conventional endless belt formed by seaming a flat base fabric of mul-tiple layer weave has the disadvantage that the yarns which need strength most wear out soon.
This disadvantage would be inevitable even in the case of base fabric of multiple layer weave as disclosed in U.K.
Patent Nos. 2106555~ and 2106557A.
According to the present invention there is provided an endless belt composed of a base fabric and a layer of an elastic material covering one side of the base fabric, wherein the base fabric is of endless and hollow triple layer weave in which the yarns in the belt running direction are disposed in three layers, with the uncovered side thereof having such a structure that the plane formed by connec-ting the apexes of the winding of the yarns in the belt running direction is at a lower position than that formed by connecting the apexes of the winding of the yarns in the direction transversely across the belt running direction, the distance between the plane which is in contact with the apexes of the winding of the yarns in the belt running direction and the plane which is in contact with the apexes of the winding of the yarns in the direction transversely across the belt running directions is 0~11 to 0.33 mm, the yarns in the belt running direction in the layer adjacent to the layer of elastic material are nylon monofilaments or polyester monofilaments 0.25 to 0.6 mm in diameter, the yarns in the belt running direction in the layer
- 2 -l~V~9 next close to -the layer of elastic ma-terial are textured yarns of 1000 to 4000 denier nylon multifilament or nylon or polyester spun yarns, and the yarns in the belt running direction in the layer farthest from the layer of elastic material are nylon monofilamen-ts or polyester monofilaments 0.25 to 0.6 mm in diame-ter, and the number of the yarns in each layer is 5 to 12 per centimeter, the yarns in the direction transversely across the belt running directions are nylon monofilaments 0.3 to 0.7 mm in diameter and the number of the yarns is 12 to 24 per centimeter and the layer o~ elastic material is formed by applying polyurethane elastomer to one side of the woven base fabric and permitting it to penetrate into the base fabric to such an extent that it does not reach the other side of the base fabric.
Thus, the present invention provides an endless belt composed o~ a base fabric and a layer of elastic material cover-ing one side of the base fabric, in which the base fabric is of endless triple layer hollow weave, with the uncovered side thereof having such a structure that the plane formed by connect-ing the apexes of the winding of the lengthwise yarns is at a lower position than that formed by connecting the apexes of the winding of the crosswise yarns.
The endless belt of this invention which is made end-less by hollow weaving as mentioned above does not have the same which differs in structure, thickness, and air permeability from the rest of the base fabric. Therefore, it has no possibility of giving seam marks to paper when it is used as a belt for an ENP.
Moreover, according to this invention, the exposed side of the, base fabric of the endless belt has such a structure that the crosswise yarns are disposed outside the lengthwise yarns, so that the lengthwise yarns are protected by the crosswise yarns.
When the endless belt of this invention is used for an ENP, the crosswise yarns, which are not subjected to high tension, will wear out as the result of contact with the felt, but the length-wise yarns, which are sub; ected to high tension, will not wear 7'~9 out. This exten~s the life time of the belt and permits the belt to perform dewatering in a stable manner over a long period of time.
The base fabric for the endless belt of this invention is produced by hollow triple layer weaving, with the crosswise yarns being warps and the lengthwise yarns being wefts. In hol-low weaving, an inner temple is used ~o make the warp density at both selvedges of hollow woven fabric even with that in other parts. The hollow weave thus produced is cut to the fixed length to give the base fabric of the endless belt. The base fabric has undergone heat setting with infrared rays or a ho-t cylinder under a predetermined amount of stretching. Tension to be applied to the lengthwise yarns is 4 to 7 kg per centimeter of the belt width. ~eat treatment is performed at 130 to 170C for 30 to 120 seconds.
The base fabric is woven of monofilaments or multifila-ments of 6-nylon, 6,6-nylon, 6,10-nylon, 12-nylon, aromatic polyamide, or polyester or the like.
The lengthwise yarns in the exposed side of the base fabric are monofilaments 0.25 mm to 0.6 mm in diameter in order that the base fabric has as much strength and thickness as required. The len~thwise yarns in the coated side of the base fabric are textured multifilament yarns, nylon spun yarns, or polyester spun yarns of 1000 to 4000 denier in ordex that they are balanced with the above-mentioned monofilaments or multifila-ments and the base fabric has as much air permeability as required.
. - 4 -,., ~2b;~)7~g Accordlng to thls Inventlon the fabrlc Is trlple layer fabrlc In whlch the lengthwlse yarns In the exposed slde of the base fabrlc are monofliaments 0.25 mm to 0.6 mm In dlameter In order that the base fabrlc has as much strength and thlckness as requlred. The lengthwise yarns on the coated slde of the base fabrlc are monofllaments 0.25 to 0.6 mm In dlameter or multiflla-ments of ~50 to 3500 denler or twlsted yarns thereof In order to ensure good adheslon wlth an elastlc material. The yarns of the Intermedlate layer sandwlched between the two layers are textured multlfllament yarns, nylon spun yarns. or polyester spun yarns of .~
~ ~ 5 -1~6~7~
1000 to 4000 denler In order that ~hey are balanced wlth the above-mentloned monofllaments or multlfllaments and the base fab-rl G has as much alr permeablllty as requlred. The number of yarns In each layer should preferably be 5 to 12 per centlmeter.
The crosswlse yarns should be monofllaments 0.3 to 0.7 mm In d lameter and the number o~ yarns should be 12 to 24 per centImeter In order that ~d - 6 -' :
, '7~9 the base fabric has proper thickness, wear resistance, and running stability.
The layer of elastic material should preferably be made of polyurethane, acrylonitrile-butadiene copolymer, ethylene-acrylate copolymer,fluorinated hydrocarkons, epichlorohydrin rubber, polyester elastomer, plastici~ed polyvinyl chloride, or thermoplastic polyurethane.
The surface of the layer of elastic material should preferably be roughened with agrindstone or the like so that it has an improved adhesion for lubricant.
The yarns on the exposed side of the base fabric should preferably be coated with wear-resistant film, low-friction filmr or water-proof film made of fluoro-carbon resin, silicone resin, fluorine-containing epoxy resin, or polyurethane resin.
The base fabric produced as mentioned above should have such a structure that the plane formed by connecting the apexes of the winding of the lengthwise yarns is at a lower position than that formed by connecting the apexes of the winding of the crosswise yarns, th~
distance between the two planes being 0.11 to 0.33 mm.
~ ~Q~
This structure is F~eerre~ from the standpoint of strength and wear resistance. The air permeability (measured according to JIS L-1079-1976) should preferably 25 be 20 to 100 cm3/cm2/sec from the standpoint of forming ~l2~(~7~
the layer of elastic material. If the air permeability is less than 20 cm3/cm2/sec, air is entrapped in the layer of elastic material; and if it is in excess of 100 cm3/cm2/sec, the elastic material passes through the base fabric during the coating process.
The layer of elastic material can beformed by applying an elastic material to one side of the base fabric and grinding to a desired thickness after curing. It is necessary to take care that the elastic material does not penetrate the base fabric. One way of controlling the penetration is to use a fast-curing elastic material, and the other way is to use textured yarns as mentioned above. Textured yarns may be replaced by singed spun yarns. (Singeing is required to eliminate fluff that forms bubbles in the layer of elastic material.) After curing, the layer of elastic material is finished to a desired thickness by grinding and at the same time the surface thereof is roughened. The grind-stone for this grinding and roughening is one which is made of green silicon carbide (JIS designation: GC) having an average diameter of U40 to 500~um (JIS
designation: grain size 24). This grindstone gives a surface roughness of about Rmax 20~ m. After the layer of elastic material has been formed, the exposed side of the base fabric should be coated with wear~resistant ~, :
lZ6~V7~9 film, low-friction film, or water-proof film by spraying or dipping.
According to this invention, the base fabric of the endless belt is made by hollow weaving. Thereofore, the endless belt of this invention is free of the seam which has caused problems in the conventional endless belt.
Moreover, because it is made by multiple warpweave in which the apexes of the winding of the lengthwise yarns are lower than those of the crosswise yarns, this structure permits the crosswise yarns to protect the lengthwise yarns under tension from wearing. Thus the endless belt of this invention is remarkably improved in the life time.
The endless belt of this invention is similar to the conventional one in that the base fabric is of endless multiple layer weave; but it is characterized in that the base fabric is made endless by hollow weaving, not by seaming. Therefore, the endless belt of this invention does not have the seaming at which irregular force is applied. It is superior in strength and other aspects to the known endless belt for the ENP.
The endless belt of this invention was compared with a conventional one by flex test under the following 74g condi-tions (in accordance JIS K-6323).
Test piece of endless belt: 30 mm wide by 500 mm long Stroke of f]exing: 130 mm Rate of flexing: 180 times/minute Ambient temperature: 25 to 35C
Load: 100 kg The conventional endless belt became unusable due to e~cessive wear of the yarns in the running direction after 500,000 times of flexing; whereas the endless belt of this invention withstood 1,000,000 times of flexing at which there ~as no sign of wear on the yarns in the belt. In other words, it is expected that the endless belt of this invention has a service life which is longer than twice that of the conven-tional one.
The invention will be further illustrated by way of the accompanying drawings, in which:-Fig. 1 is a perspective view of an example of the end-less belt of this invention;
Fig. 2 is a partly enlarged sectional view taken along the line A-A' of Fig. l;
Fig.s 3 (a)~ (b) and (c) are a sectional view of the structure of the base fabric, a sectional view illustrating the weaving process, and a weave pattern of the base fabric, resp~c-tively; and Fig. 4 is another example of the base fabric which cor-responds to Fig. 3.
.. .~ ..
~2~i~7~
In Flg. 1 7 there Is shown an example of the endless belt (1) of thls Inventlon In whlch the base fabrlc Is of trlple warp weave. The leng~h In the belt runnlng dlrectlon (0C) Is 7.62 m and ~he wldth in the ~ransverse dlrectlon (~ ) Is 4.76 m.
The outslde Is the exposed slde (2) of the base fabrlc and the 7nslde Is the polyurethane rubber layer (33.
Flg. 2 Is a sectlonal view taken along the llne A-A' of Flg. 1. The thlckness Tl of the endless belt (1) Is 2.7 mm~ the thlckness T2 of the base fabrlc (4) Is 1.76 mm, and the thlckness T3 of the polyurethane rubber ..
~0
Thus, the present invention provides an endless belt composed o~ a base fabric and a layer of elastic material cover-ing one side of the base fabric, in which the base fabric is of endless triple layer hollow weave, with the uncovered side thereof having such a structure that the plane formed by connect-ing the apexes of the winding of the lengthwise yarns is at a lower position than that formed by connecting the apexes of the winding of the crosswise yarns.
The endless belt of this invention which is made end-less by hollow weaving as mentioned above does not have the same which differs in structure, thickness, and air permeability from the rest of the base fabric. Therefore, it has no possibility of giving seam marks to paper when it is used as a belt for an ENP.
Moreover, according to this invention, the exposed side of the, base fabric of the endless belt has such a structure that the crosswise yarns are disposed outside the lengthwise yarns, so that the lengthwise yarns are protected by the crosswise yarns.
When the endless belt of this invention is used for an ENP, the crosswise yarns, which are not subjected to high tension, will wear out as the result of contact with the felt, but the length-wise yarns, which are sub; ected to high tension, will not wear 7'~9 out. This exten~s the life time of the belt and permits the belt to perform dewatering in a stable manner over a long period of time.
The base fabric for the endless belt of this invention is produced by hollow triple layer weaving, with the crosswise yarns being warps and the lengthwise yarns being wefts. In hol-low weaving, an inner temple is used ~o make the warp density at both selvedges of hollow woven fabric even with that in other parts. The hollow weave thus produced is cut to the fixed length to give the base fabric of the endless belt. The base fabric has undergone heat setting with infrared rays or a ho-t cylinder under a predetermined amount of stretching. Tension to be applied to the lengthwise yarns is 4 to 7 kg per centimeter of the belt width. ~eat treatment is performed at 130 to 170C for 30 to 120 seconds.
The base fabric is woven of monofilaments or multifila-ments of 6-nylon, 6,6-nylon, 6,10-nylon, 12-nylon, aromatic polyamide, or polyester or the like.
The lengthwise yarns in the exposed side of the base fabric are monofilaments 0.25 mm to 0.6 mm in diameter in order that the base fabric has as much strength and thickness as required. The len~thwise yarns in the coated side of the base fabric are textured multifilament yarns, nylon spun yarns, or polyester spun yarns of 1000 to 4000 denier in ordex that they are balanced with the above-mentioned monofilaments or multifila-ments and the base fabric has as much air permeability as required.
. - 4 -,., ~2b;~)7~g Accordlng to thls Inventlon the fabrlc Is trlple layer fabrlc In whlch the lengthwlse yarns In the exposed slde of the base fabrlc are monofliaments 0.25 mm to 0.6 mm In dlameter In order that the base fabrlc has as much strength and thlckness as requlred. The lengthwise yarns on the coated slde of the base fabrlc are monofllaments 0.25 to 0.6 mm In dlameter or multiflla-ments of ~50 to 3500 denler or twlsted yarns thereof In order to ensure good adheslon wlth an elastlc material. The yarns of the Intermedlate layer sandwlched between the two layers are textured multlfllament yarns, nylon spun yarns. or polyester spun yarns of .~
~ ~ 5 -1~6~7~
1000 to 4000 denler In order that ~hey are balanced wlth the above-mentloned monofllaments or multlfllaments and the base fab-rl G has as much alr permeablllty as requlred. The number of yarns In each layer should preferably be 5 to 12 per centlmeter.
The crosswlse yarns should be monofllaments 0.3 to 0.7 mm In d lameter and the number o~ yarns should be 12 to 24 per centImeter In order that ~d - 6 -' :
, '7~9 the base fabric has proper thickness, wear resistance, and running stability.
The layer of elastic material should preferably be made of polyurethane, acrylonitrile-butadiene copolymer, ethylene-acrylate copolymer,fluorinated hydrocarkons, epichlorohydrin rubber, polyester elastomer, plastici~ed polyvinyl chloride, or thermoplastic polyurethane.
The surface of the layer of elastic material should preferably be roughened with agrindstone or the like so that it has an improved adhesion for lubricant.
The yarns on the exposed side of the base fabric should preferably be coated with wear-resistant film, low-friction filmr or water-proof film made of fluoro-carbon resin, silicone resin, fluorine-containing epoxy resin, or polyurethane resin.
The base fabric produced as mentioned above should have such a structure that the plane formed by connecting the apexes of the winding of the lengthwise yarns is at a lower position than that formed by connecting the apexes of the winding of the crosswise yarns, th~
distance between the two planes being 0.11 to 0.33 mm.
~ ~Q~
This structure is F~eerre~ from the standpoint of strength and wear resistance. The air permeability (measured according to JIS L-1079-1976) should preferably 25 be 20 to 100 cm3/cm2/sec from the standpoint of forming ~l2~(~7~
the layer of elastic material. If the air permeability is less than 20 cm3/cm2/sec, air is entrapped in the layer of elastic material; and if it is in excess of 100 cm3/cm2/sec, the elastic material passes through the base fabric during the coating process.
The layer of elastic material can beformed by applying an elastic material to one side of the base fabric and grinding to a desired thickness after curing. It is necessary to take care that the elastic material does not penetrate the base fabric. One way of controlling the penetration is to use a fast-curing elastic material, and the other way is to use textured yarns as mentioned above. Textured yarns may be replaced by singed spun yarns. (Singeing is required to eliminate fluff that forms bubbles in the layer of elastic material.) After curing, the layer of elastic material is finished to a desired thickness by grinding and at the same time the surface thereof is roughened. The grind-stone for this grinding and roughening is one which is made of green silicon carbide (JIS designation: GC) having an average diameter of U40 to 500~um (JIS
designation: grain size 24). This grindstone gives a surface roughness of about Rmax 20~ m. After the layer of elastic material has been formed, the exposed side of the base fabric should be coated with wear~resistant ~, :
lZ6~V7~9 film, low-friction film, or water-proof film by spraying or dipping.
According to this invention, the base fabric of the endless belt is made by hollow weaving. Thereofore, the endless belt of this invention is free of the seam which has caused problems in the conventional endless belt.
Moreover, because it is made by multiple warpweave in which the apexes of the winding of the lengthwise yarns are lower than those of the crosswise yarns, this structure permits the crosswise yarns to protect the lengthwise yarns under tension from wearing. Thus the endless belt of this invention is remarkably improved in the life time.
The endless belt of this invention is similar to the conventional one in that the base fabric is of endless multiple layer weave; but it is characterized in that the base fabric is made endless by hollow weaving, not by seaming. Therefore, the endless belt of this invention does not have the seaming at which irregular force is applied. It is superior in strength and other aspects to the known endless belt for the ENP.
The endless belt of this invention was compared with a conventional one by flex test under the following 74g condi-tions (in accordance JIS K-6323).
Test piece of endless belt: 30 mm wide by 500 mm long Stroke of f]exing: 130 mm Rate of flexing: 180 times/minute Ambient temperature: 25 to 35C
Load: 100 kg The conventional endless belt became unusable due to e~cessive wear of the yarns in the running direction after 500,000 times of flexing; whereas the endless belt of this invention withstood 1,000,000 times of flexing at which there ~as no sign of wear on the yarns in the belt. In other words, it is expected that the endless belt of this invention has a service life which is longer than twice that of the conven-tional one.
The invention will be further illustrated by way of the accompanying drawings, in which:-Fig. 1 is a perspective view of an example of the end-less belt of this invention;
Fig. 2 is a partly enlarged sectional view taken along the line A-A' of Fig. l;
Fig.s 3 (a)~ (b) and (c) are a sectional view of the structure of the base fabric, a sectional view illustrating the weaving process, and a weave pattern of the base fabric, resp~c-tively; and Fig. 4 is another example of the base fabric which cor-responds to Fig. 3.
.. .~ ..
~2~i~7~
In Flg. 1 7 there Is shown an example of the endless belt (1) of thls Inventlon In whlch the base fabrlc Is of trlple warp weave. The leng~h In the belt runnlng dlrectlon (0C) Is 7.62 m and ~he wldth in the ~ransverse dlrectlon (~ ) Is 4.76 m.
The outslde Is the exposed slde (2) of the base fabrlc and the 7nslde Is the polyurethane rubber layer (33.
Flg. 2 Is a sectlonal view taken along the llne A-A' of Flg. 1. The thlckness Tl of the endless belt (1) Is 2.7 mm~ the thlckness T2 of the base fabrlc (4) Is 1.76 mm, and the thlckness T3 of the polyurethane rubber ..
~0
3~
- 10a -~, '" :
lZ~ 7~
layer (3) is 2.2 mm. The lengthwise yarns (in the running direction (~)) form three layers, i.e., the layer of the exposed side (xl, x2, ...), the inter-mediate layer (Yl, Y2, ...~, and the layer adjacent to the polyule~ane rubber layer (Zl, Z2~ ...). The cross-wise yarns (in the transverse direction (~)) (kl, k2, ...) pass outside the lengthwise yarns(xl, x2, ... and Zl, Z2~ )-The imaginary plane (P~ on the exposed side (2) is in contact with the apexes of the bends of thecrosswise yarns (kl, k2, ...). The imaginary plane (Q) is in contact with the apexes o~ the bends of the lengthwise yarns (xl, x2~ ...). The distance (H) between the plane (P) and the plane (Q) is 0.21 mm.
Fig. 3 shows the detailed structure of the base fabric (4). In Fig. 3(a), the crosswise yarns (kl, k2, ...) are nylon monofilaments 0.47 mm in diameter, which are set as the warp on the loom. The lengthwise yarns (xl, x2, ...) in the upper layer are nylon monofilaments 0.37 mm in diameter; the lengthwise yarns(yl, Y2~
in the middle layer are textured yarns of 1600 denier nylon multifilaments; and the lengthwise yarns (Zl, Z2, ...) in the lower layer are nylon monofilaments 0.37 mm in diameter. These lengthwise yarns are set as weft on the loom. The thus set warps and wefts undergo hollow ,., , . "
............. .. . . .
weave according to the weave pattern shown in Fig. 3~c). The warps become the crosswise yarns in the transverse direction (~ ) and -the wefts become the lengthwise yarns in the running direc-tion ~.
Tables 1-1 to 1-3 shows the characteristic properties of the base fabrlc (4) and other base fabrics which are the same ln structure as the base fabric (~) but are made of different kinds of yarns.
Fig. 4 shows another example of a base fabric of triple warp weave.
Fig. 4 shows another example of triple layer weave which is different from that shown in Fig. 3. In this example, the crosswise yarns (k2 and k4) weave through the lengthwise yarns (Xl~x2~ and Zl~Z2~ -.), and the crosswise yarn (k weaves through yarn (xl,x2, ... ) and the crosswise yarn (k3) weaves through the lengthwise yarns (Zl,z2, --)- since the yarns ~kl and k3) bend obtuse and the area in contact with the felt is large, the base fabric of this structure is superior in wear resistance.
-, -~2~)'7~9 In this example, the lengthwise yarns (xl,x2, ...) at the exposed side of the base fabric are nylon monofllaments 0.43 mm in diameter; the lengthwlse yarns (Yl,Y2, ...) in the middle layer are textured yarns of 16Q0 denier nylon multifilaments; and the lengthwise yarns (Zl,Z2, --) in the layer ad~acent to the polyurethane rubber layer are nylon monofilaments 0.43 mm in diameter. The crosswise yarns (kl,k2, ...) are nylon monofila-ments 0.52 mm in diameter. Table 2 shows the characteristic properties of the base fabric of this example. The base fabric was woven according to the weave pattern shown in Fig. 4. the base fabric was made into the endless belt having the same length and width as the one shown in Fig. 1.
,, ~;Z6~7~
In the Figures:
~l~ ... endless belt (2~ ... exposed side of base fabric (3~ ... polyurethane rubber layer
- 10a -~, '" :
lZ~ 7~
layer (3) is 2.2 mm. The lengthwise yarns (in the running direction (~)) form three layers, i.e., the layer of the exposed side (xl, x2, ...), the inter-mediate layer (Yl, Y2, ...~, and the layer adjacent to the polyule~ane rubber layer (Zl, Z2~ ...). The cross-wise yarns (in the transverse direction (~)) (kl, k2, ...) pass outside the lengthwise yarns(xl, x2, ... and Zl, Z2~ )-The imaginary plane (P~ on the exposed side (2) is in contact with the apexes of the bends of thecrosswise yarns (kl, k2, ...). The imaginary plane (Q) is in contact with the apexes o~ the bends of the lengthwise yarns (xl, x2~ ...). The distance (H) between the plane (P) and the plane (Q) is 0.21 mm.
Fig. 3 shows the detailed structure of the base fabric (4). In Fig. 3(a), the crosswise yarns (kl, k2, ...) are nylon monofilaments 0.47 mm in diameter, which are set as the warp on the loom. The lengthwise yarns (xl, x2, ...) in the upper layer are nylon monofilaments 0.37 mm in diameter; the lengthwise yarns(yl, Y2~
in the middle layer are textured yarns of 1600 denier nylon multifilaments; and the lengthwise yarns (Zl, Z2, ...) in the lower layer are nylon monofilaments 0.37 mm in diameter. These lengthwise yarns are set as weft on the loom. The thus set warps and wefts undergo hollow ,., , . "
............. .. . . .
weave according to the weave pattern shown in Fig. 3~c). The warps become the crosswise yarns in the transverse direction (~ ) and -the wefts become the lengthwise yarns in the running direc-tion ~.
Tables 1-1 to 1-3 shows the characteristic properties of the base fabrlc (4) and other base fabrics which are the same ln structure as the base fabric (~) but are made of different kinds of yarns.
Fig. 4 shows another example of a base fabric of triple warp weave.
Fig. 4 shows another example of triple layer weave which is different from that shown in Fig. 3. In this example, the crosswise yarns (k2 and k4) weave through the lengthwise yarns (Xl~x2~ and Zl~Z2~ -.), and the crosswise yarn (k weaves through yarn (xl,x2, ... ) and the crosswise yarn (k3) weaves through the lengthwise yarns (Zl,z2, --)- since the yarns ~kl and k3) bend obtuse and the area in contact with the felt is large, the base fabric of this structure is superior in wear resistance.
-, -~2~)'7~9 In this example, the lengthwise yarns (xl,x2, ...) at the exposed side of the base fabric are nylon monofllaments 0.43 mm in diameter; the lengthwlse yarns (Yl,Y2, ...) in the middle layer are textured yarns of 16Q0 denier nylon multifilaments; and the lengthwise yarns (Zl,Z2, --) in the layer ad~acent to the polyurethane rubber layer are nylon monofilaments 0.43 mm in diameter. The crosswise yarns (kl,k2, ...) are nylon monofila-ments 0.52 mm in diameter. Table 2 shows the characteristic properties of the base fabric of this example. The base fabric was woven according to the weave pattern shown in Fig. 4. the base fabric was made into the endless belt having the same length and width as the one shown in Fig. 1.
,, ~;Z6~7~
In the Figures:
~l~ ... endless belt (2~ ... exposed side of base fabric (3~ ... polyurethane rubber layer
(4) ... base fabric ~o~ ... belt rurming direction ~ . transverse direction ~0 ., ~ , 1~6~
Xlr X2r --; Ylr Y2r ...i and Zlr Z2r ..~: lengthwise yarns (in the belt running direction) kl, k2, ...: crosswise yarns ~in the transverse direction) :
.
.
`~ -- 15 ~
- , ~
. .
: - ,:
.
:
: , ~: . :` ` ' :
lZ~(3749 Table 1-1 Characteristic Properties of Base Fabric Lengthwise yarns, "x" Nylon monofilament 0.37 mm in diameter "y" Textured yarns of 1600 denier nylon multifilament "z" Nylon monofilament 0.37 mm in diameter Crosswise yarnsNylon monofilament 0.47 mm in diameter Mesh (number of yarns Warp : 27.2 per centimeter) Weft : 16.9 Thickness (mm) 1.76 Weight (g/m2) 833 Air permeability 56 ( cm3/cm2/sec ) Strength (kg/cm) at 1% elonyation3.8 at 2% elongation6.3 at 5% elongation16.3 at 10% elongation 36.7 at break 141.3 Sample size Length (cm) : 20 Width (mm) : 10 n~r of sample : 3 ~LZti~)~7~9 Table 1-2 Characteristic Properties of Base Fabric Lengthwise yarns, "x" Nylon monofilament 0.43 mm in diameter "y" 1600 denier polyester twisted yarn "z" Nylon monofilament 0.43 mm in diameter Crosswise yarns Nylon monofilament 0.47 mm in diameter Mesh (number of yarns Warp : 24.4 per centimeter) Weft : 16.5 Thickness (mm) 2.06 Weight (g/m2) 948 Air permeability 76 ( cm3/cm2/sec ) Strength (kg/cm) at 1% elongation 4.8 at 2% elongation 10.2 at 5% elongation 25.2 at 10% elongation 58.0 at break 173.8 Sample size Length (cm) : ~ 20 Width (mm) . 10 nw~ of sample : 3 i2G~7~
Table 1-3 Characteristic Properties of Base Fabric Lengthwise yarns, "x" Polyester monofilament 0.40 mm in diameter "y" 1600 denier polyester twisted yarn "z" Polyester monofilament 0.40 mm in diameter Crosswise yarns Nylon monofilamènt 0.47 mm in diameter Mesh (number of yarns Warp : 27.2 per centimeter) Weft : 16.1 Thickness (mm) 1.94 Weight (g/m2) 994 Air permeability 65 ( cm3/cm2/sec ) Strength (ky/cm) at 1% elongation 12.9 at 2~ elongation 2601 at 5% elongation 46.7 at 10~ elongation 65.4 at break 152.0 Sample size Length (cm) : 20 Width (mm) : 10 number of sa~ple : 3 12t;V~9~9 Table 2 Characteristic Properties of Base Fabric Lengthwise yarns, "x" Nylon monofilament 0.43 mm in diameter "y" Textured yarns o 1600 denier nylon multifilament "z" Nylon monofilament 0.43 mm in diameter Crosswise yarns Nylon monofilament 0,52 mm in diameter Mesh (number of yarns Warp : 24.0 per centimeter) Weft : 16.5 Thickness (mm) 2.10 Weight (g/m23 900 Air permeability 65 ( cm3/cm2/sec ) Strength ~kg/cm) at 1% elongation 4.5 at 2~ elongation 9.8 at 5% elongation 24.0 at 10% elongation 56.0 at break 170.4 Sample size Length (cm) : 20 Width (mm) : 10 n ~ er of sa~ple : 3 .~2f~()7~3 Table 3 Characteristic Properties of Base Fabric Lengthwise yarns, "x" Nylon monofilament 0.35 mm in diameter "y" Nylon monofilament Q.35 mm in diameter "w" 1600 denier polyester spun yarn "z" Nylon monofilament 0.35 mm in diameter Crosswise yarns Nylon monofilament 0.47 mm in diameter Mesh (number of yarns Warp : 33.1 per centimeter) Weft : 16.5 Thickness (mm) 2.40 Weight (g/m2) 1100 Air permeability 40 ( cm3/cm2/sec ) Strength (kg/cm) at 1% elongation 6.0 at 2~ elongation 13.4 at 5% elongation 40.3 at 10% elongation 84.5 at break 238.2 Sample size Length (cm) : 20 Width (mm) : 10 ~r of sample : 3 ,
Xlr X2r --; Ylr Y2r ...i and Zlr Z2r ..~: lengthwise yarns (in the belt running direction) kl, k2, ...: crosswise yarns ~in the transverse direction) :
.
.
`~ -- 15 ~
- , ~
. .
: - ,:
.
:
: , ~: . :` ` ' :
lZ~(3749 Table 1-1 Characteristic Properties of Base Fabric Lengthwise yarns, "x" Nylon monofilament 0.37 mm in diameter "y" Textured yarns of 1600 denier nylon multifilament "z" Nylon monofilament 0.37 mm in diameter Crosswise yarnsNylon monofilament 0.47 mm in diameter Mesh (number of yarns Warp : 27.2 per centimeter) Weft : 16.9 Thickness (mm) 1.76 Weight (g/m2) 833 Air permeability 56 ( cm3/cm2/sec ) Strength (kg/cm) at 1% elonyation3.8 at 2% elongation6.3 at 5% elongation16.3 at 10% elongation 36.7 at break 141.3 Sample size Length (cm) : 20 Width (mm) : 10 n~r of sample : 3 ~LZti~)~7~9 Table 1-2 Characteristic Properties of Base Fabric Lengthwise yarns, "x" Nylon monofilament 0.43 mm in diameter "y" 1600 denier polyester twisted yarn "z" Nylon monofilament 0.43 mm in diameter Crosswise yarns Nylon monofilament 0.47 mm in diameter Mesh (number of yarns Warp : 24.4 per centimeter) Weft : 16.5 Thickness (mm) 2.06 Weight (g/m2) 948 Air permeability 76 ( cm3/cm2/sec ) Strength (kg/cm) at 1% elongation 4.8 at 2% elongation 10.2 at 5% elongation 25.2 at 10% elongation 58.0 at break 173.8 Sample size Length (cm) : ~ 20 Width (mm) . 10 nw~ of sample : 3 i2G~7~
Table 1-3 Characteristic Properties of Base Fabric Lengthwise yarns, "x" Polyester monofilament 0.40 mm in diameter "y" 1600 denier polyester twisted yarn "z" Polyester monofilament 0.40 mm in diameter Crosswise yarns Nylon monofilamènt 0.47 mm in diameter Mesh (number of yarns Warp : 27.2 per centimeter) Weft : 16.1 Thickness (mm) 1.94 Weight (g/m2) 994 Air permeability 65 ( cm3/cm2/sec ) Strength (ky/cm) at 1% elongation 12.9 at 2~ elongation 2601 at 5% elongation 46.7 at 10~ elongation 65.4 at break 152.0 Sample size Length (cm) : 20 Width (mm) : 10 number of sa~ple : 3 12t;V~9~9 Table 2 Characteristic Properties of Base Fabric Lengthwise yarns, "x" Nylon monofilament 0.43 mm in diameter "y" Textured yarns o 1600 denier nylon multifilament "z" Nylon monofilament 0.43 mm in diameter Crosswise yarns Nylon monofilament 0,52 mm in diameter Mesh (number of yarns Warp : 24.0 per centimeter) Weft : 16.5 Thickness (mm) 2.10 Weight (g/m23 900 Air permeability 65 ( cm3/cm2/sec ) Strength ~kg/cm) at 1% elongation 4.5 at 2~ elongation 9.8 at 5% elongation 24.0 at 10% elongation 56.0 at break 170.4 Sample size Length (cm) : 20 Width (mm) : 10 n ~ er of sa~ple : 3 .~2f~()7~3 Table 3 Characteristic Properties of Base Fabric Lengthwise yarns, "x" Nylon monofilament 0.35 mm in diameter "y" Nylon monofilament Q.35 mm in diameter "w" 1600 denier polyester spun yarn "z" Nylon monofilament 0.35 mm in diameter Crosswise yarns Nylon monofilament 0.47 mm in diameter Mesh (number of yarns Warp : 33.1 per centimeter) Weft : 16.5 Thickness (mm) 2.40 Weight (g/m2) 1100 Air permeability 40 ( cm3/cm2/sec ) Strength (kg/cm) at 1% elongation 6.0 at 2~ elongation 13.4 at 5% elongation 40.3 at 10% elongation 84.5 at break 238.2 Sample size Length (cm) : 20 Width (mm) : 10 ~r of sample : 3 ,
Claims (2)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An endless belt composed of a base fabric and a layer of an elastic material covering one side of the base fab-ric, wherein the base fabric is of endless and hollow triple layer weave in which the yarns in the belt running direction are disposed in three layers, with the uncovered side thereof having such a structure that the plane formed by connecting the apexes of the winding of the yarns in the belt running direction is at a lower position than that formed by connecting the apexes of the winding of the yarns in the direction transversely across the belt running direction, the distance between the plane which is in contact with the apexes of the winding of the yarns in the belt running direction and the plane which is in contact with the apexes of the winding of the yarns in the direction transversely across the belt running directions is 0.11 to 0.33 mm, the yarns in the belt running direction in the layer adjacent to the layer of elastic material are nylon monofilaments or polyester monofil-aments 0.25 to 0.6 mm in diameter, the yarns in the belt running direction in the layer next close to the layer of elastic mate-rial are textured yarns of 1000 to 4000 denier nylon multifila-ment or nylon or polyester spun yarns, and the yarns in the belt running direction in the layer farthest from the layer of elastic material are nylon monofilaments or polyester monofilaments 0.25 to 0.6 mm in diameter, and the number of the yarns in each layer is 5 to 12 per centimeter, the yarns in the direction trans-versely across the belt running directions are nylon monofila-ments 0.3 to 0.7 mm in diameter and the number of the yarns is 12 to 24 per centimeter and the layer of elastic material is formed by applying polyurethane elastomer to one side of the woven base fabric and permitting it to penetrate into the base fabric to such an extent that it does not reach the other side of the base fabric.
2. An endless belt as set forth in claim 1, wherein the yarns which are exposed on the exposed side of the base fab-ric are coated with wear-resistant film.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP189039/1983 | 1983-10-07 | ||
| JP58189039A JPS6081391A (en) | 1983-10-07 | 1983-10-07 | Endless belt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1260749A true CA1260749A (en) | 1989-09-26 |
Family
ID=16234267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000463664A Expired CA1260749A (en) | 1983-10-07 | 1984-09-20 | Endless belt |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP0138797A3 (en) |
| JP (1) | JPS6081391A (en) |
| AU (1) | AU572562B2 (en) |
| BR (1) | BR8405060A (en) |
| CA (1) | CA1260749A (en) |
| DE (1) | DE138797T1 (en) |
| ES (1) | ES536193A0 (en) |
| FI (1) | FI85889B (en) |
| NO (1) | NO843988L (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3715153A1 (en) * | 1987-05-07 | 1988-12-01 | Voith Gmbh J M | REINFORCED PRESS SHEATH FOR A PRESS DEVICE FOR TREATING RAIL-SHAPED GOODS, SUCH AS, FOR example, OF PAPER SHEETS, AND METHOD AND DEVICE FOR THE PRODUCTION THEREOF |
| EP0290653B1 (en) * | 1987-05-14 | 1990-04-11 | Thomas Josef Heimbach GmbH & Co. | Material web |
| JP3038677B2 (en) * | 1988-10-26 | 2000-05-08 | 株式会社リコー | Manufacturing method of paper transfer belt |
| JPH0311097U (en) * | 1989-03-18 | 1991-02-01 | ||
| DE3914534C1 (en) * | 1989-05-02 | 1990-10-18 | Thomas Josef Heimbach Gmbh & Co, 5160 Dueren, De | |
| DE3914533A1 (en) * | 1989-05-02 | 1990-11-08 | Heimbach Gmbh Thomas Josef | TAPE FOR PAPER MACHINES |
| FI92738C (en) * | 1989-09-08 | 1994-12-27 | Albany Int Corp | Belt |
| EP0834615A1 (en) * | 1996-10-01 | 1998-04-08 | Württembergische Filztuchfabrik D. Geschmay GmbH | Fabric web |
| JP2001151319A (en) * | 1999-11-30 | 2001-06-05 | Nippon Filcon Co Ltd | Belt for processing nonwoven cloth product for stain- proof sanitary use |
| JP2002275780A (en) * | 2001-03-19 | 2002-09-25 | Ichikawa Woolen Textile Co Ltd | Belt for shoe press |
| DE102004011665A1 (en) * | 2004-03-10 | 2005-10-06 | Stowe Woodward Ag | Integral shoe press belt |
| JP4937330B2 (en) * | 2009-10-22 | 2012-05-23 | 日本フエルト株式会社 | Shoe press belt |
| JP7205506B2 (en) * | 2020-02-28 | 2023-01-17 | イチカワ株式会社 | Shoe press belt and method for manufacturing the shoe press belt |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE324101B (en) * | 1967-01-31 | 1970-05-19 | Nordiska Maskinfilt Ab | |
| US4086941A (en) * | 1976-10-26 | 1978-05-02 | Huyck Corporation | Biplanar papermaker's belt |
| DE3026222A1 (en) * | 1980-07-10 | 1982-02-04 | Siegfried Alexander Dipl.-Ing. 7960 Aulendorf Eisenmann | GEAR RING PUMP |
| US4359069A (en) * | 1980-08-28 | 1982-11-16 | Albany International Corp. | Low density multilayer papermaking fabric |
| BR8107715A (en) * | 1981-01-29 | 1983-04-12 | Albany Int Corp | DRYER FABRIC FOR PAPER PRODUCTION MACHINE WIRELESS DRYER FELT DRYER FABRIC PROCESS FOR STABILIZING A FELT DRYER FABRIC |
| GB2106555B (en) * | 1981-09-15 | 1985-10-02 | Albany Int Corp | Improvements relating to extended nip dewatering presses and to the manufacture of belts for use in such presses |
| NL185678C (en) * | 1981-09-24 | 1990-06-18 | Albany Int Corp | Pressing device for dewatering a fiber web, as well as a method for manufacturing an endless belt therefor. |
| US4423755A (en) * | 1982-01-22 | 1984-01-03 | Huyck Corporation | Papermakers' fabric |
| JPS59100789A (en) * | 1982-12-02 | 1984-06-11 | アルバニ−・インタナシヨナル・コ−ポレ−シヨン | Dehydration press |
| JPS59100788A (en) * | 1982-12-02 | 1984-06-11 | アルバニ−・インタナシヨナル・コ−ポレ−シヨン | Dehydration press |
-
1983
- 1983-10-07 JP JP58189039A patent/JPS6081391A/en active Granted
-
1984
- 1984-09-20 CA CA000463664A patent/CA1260749A/en not_active Expired
- 1984-09-24 ES ES536193A patent/ES536193A0/en active Granted
- 1984-09-25 AU AU33493/84A patent/AU572562B2/en not_active Ceased
- 1984-09-28 EP EP84870140A patent/EP0138797A3/en not_active Withdrawn
- 1984-09-28 DE DE198484870140T patent/DE138797T1/en active Pending
- 1984-10-04 NO NO843988A patent/NO843988L/en unknown
- 1984-10-05 FI FI843927A patent/FI85889B/en not_active Application Discontinuation
- 1984-10-05 BR BR8405060A patent/BR8405060A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| FI843927A0 (en) | 1984-10-05 |
| EP0138797A3 (en) | 1985-09-18 |
| JPS6315398B2 (en) | 1988-04-04 |
| DE138797T1 (en) | 1985-10-24 |
| AU3349384A (en) | 1985-04-18 |
| JPS6081391A (en) | 1985-05-09 |
| FI85889B (en) | 1992-02-28 |
| ES8506127A1 (en) | 1985-06-16 |
| AU572562B2 (en) | 1988-05-12 |
| ES536193A0 (en) | 1985-06-16 |
| NO843988L (en) | 1985-04-09 |
| EP0138797A2 (en) | 1985-04-24 |
| BR8405060A (en) | 1985-08-20 |
| FI843927L (en) | 1985-04-08 |
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| MKEX | Expiry |