JP7244323B2 - SEAM FELT FOR PAPER MANUFACTURING AND METHOD FOR MANUFACTURING SAME - Google Patents

SEAM FELT FOR PAPER MANUFACTURING AND METHOD FOR MANUFACTURING SAME Download PDF

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JP7244323B2
JP7244323B2 JP2019060413A JP2019060413A JP7244323B2 JP 7244323 B2 JP7244323 B2 JP 7244323B2 JP 2019060413 A JP2019060413 A JP 2019060413A JP 2019060413 A JP2019060413 A JP 2019060413A JP 7244323 B2 JP7244323 B2 JP 7244323B2
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base fabric
upper base
loop
cloth
lower base
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JP2020158925A (en
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翔 安羅岡
勝也 小川
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Nippon Felt Co Ltd
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本開示は、互いに重ねられた2枚の基布と、基布に一体化されたバット繊維層とを備える製紙用シームフェルトに関する。 SUMMARY OF THE DISCLOSURE The present disclosure relates to a papermaking seam felt comprising two base fabrics stacked together and a batt fiber layer integrated with the base fabric.

抄紙機における湿紙から水分を機械的に搾るプレスパートで、湿紙の運搬及び搾水のために使用される製紙用フェルトは、経糸及び緯糸が互いに織られた基布と、短繊維からなるバット繊維層とをニードリングによって一体化して形成される。製紙用フェルトには、湿紙運搬性、搾水性、紙の表面にマークを付けない表面性(紙面性)、抄紙機に装着されてから好ましい状態になるまでの時間に関する初期馴染み性、防汚性、及び耐久性等が要求される。製紙用シームフェルトは、丈方向の両端部にループを備え、両端部のループを互いに接合することによって無端状にして抄紙機に取り付けられる。 The papermaking felt used for conveying and squeezing the wet paper in the press part of the paper machine mechanically extracts water from the wet paper. It is formed integrally with the batt fiber layer by needling. Felt for papermaking has properties such as wet paper transportability, water squeezing, surface property that does not leave marks on the paper surface (paper surface property), initial familiarity related to the time from being attached to the paper machine until it reaches a desirable state, and antifouling. performance, durability, etc. are required. The papermaking seam felt is provided with loops at both lengthwise ends and is attached to the paper machine in an endless manner by joining the loops at both ends together.

製紙用シームフェルトを、例えば白板抄造やパルプ抄造等のプレスパートやシュープレスパートといった湿紙からの脱水量が多い部分で使用する場合、空隙体積が大きいことが好ましい。空隙容積を大きくするために、2枚の基布を互いに重ね合わせたラミネート構造の基布が用いられることがある。このような2枚の基布を備える製紙用シームフェルトは、各々の基布の両端部を接合するとシーム部が2段になって厚くなるため、シーム部と他の部分との間の段差が大きくなる。そのため、紙の表面に付くシームマークが深くなって表面性が悪化し、また、製紙用シームフェルトを走行させるロール上をシーム部が通過する時に振動が大きくなるという問題があった。そこで、例えば、特許文献1に記載の発明では、ラミネート構造の基布を備えた製紙用シームフェルトにおいて、に重ねられた基布のループの位置を互いに前後にずらすことによって、シームマークを抑制している。 When the seam felt for papermaking is used in a portion where a large amount of water is removed from the wet paper, such as the press part or shoe press part of white board making, pulp making, etc., the pore volume is preferably large. In order to increase the void volume, a base fabric having a laminate structure in which two base fabrics are superimposed on each other is sometimes used. In a papermaking seam felt comprising two such base fabrics, when both ends of each base fabric are joined, the seam portion becomes two-stepped and thickened, so the step between the seam portion and the other portion becomes large. growing. As a result, the seam marks on the surface of the paper become deep, degrading the surface properties, and there is a problem that vibration increases when the seam passes over the rolls on which the papermaking seam felt runs. Therefore, for example, in the invention described in Patent Document 1, in a papermaking seam felt provided with a base fabric having a laminated structure, seam marks are suppressed by shifting the positions of the loops of the superimposed base fabrics back and forth from each other. ing.

特開平11-323763号公報JP-A-11-323763

特許文献1に記載の製紙用シームフェルトでは、上下の基布のシーム部の位置がずれているため、シーム部の厚さの増大が抑制されて、シームマーク及び振動が抑制されるが、更なる表面性の向上及び振動の抑制が求められていた。 In the papermaking seam felt described in Patent Document 1, since the positions of the seam portions of the upper and lower base fabrics are misaligned, an increase in the thickness of the seam portion is suppressed, thereby suppressing seam marks and vibration. There has been a demand for improved surface properties and suppression of vibration.

また、シーム部の接合を容易にすることも求められている。例えば、2枚の基布の一方を接合しないことによって接合を容易にすることも考えられたが、この場合、接合されていない基布のループの先端が割れ(切れ)てしまい、ループ内に挿通された充填糸や、ループの近傍の緯糸が解れて出てしまうという問題が生じた。ループの割れを防ぐために、充填糸を太くしてループがつぶれないようにすると、ループ部分が地部に比べて厚くなり、シームマークや振動の原因となった。 There is also a demand for facilitating the joining of seams. For example, it was considered to facilitate the joining by not joining one of the two base fabrics, but in this case, the tip of the loop of the unjoined base fabric would crack (cut), and the loop would be cut. A problem arises in that the inserted filling yarn and the weft yarn near the loop are unraveled and come out. In order to prevent cracking of the loop, the filling yarn was thickened to prevent the loop from being crushed, but the loop portion became thicker than the base portion, causing seam marks and vibration.

このような問題に鑑み、本発明は、互いに重ね合わせた2枚の基布を有する製紙用シームフェルトの表面性の向上、及び振動の抑制を目的とする。 In view of such problems, an object of the present invention is to improve surface properties and suppress vibration of a papermaking seam felt having two sheets of base fabrics superimposed on each other.

本発明の少なくともいくつかの実施形態は、基布(2)と、前記基布に一体化されたバット繊維層(3)とを備える製紙用シームフェルト(1)であって、前記基布は、下基布(10)、前記下基布に対して上側に重ねて配置された上基布(20)とを含み、前記下基布は、下基布経糸(11)及び下基布緯糸(12)が互いに織られて形成された下基布地部(13)と、前記下基布地部における機械方向の一端から突出し、前記下基布経糸が折り返されることによって形成された前側下基布ループ(14)と、前記下基布地部における前記機械方向の他端から突出し、前記下基布経糸が折り返されることによって形成されて、芯線によって前記前側下基布ループに接合されて、前記前側下基布ループに対して前記機械方向の後側に位置する後側下基布ループ(15)とを含み、前記上基布は、上基布経糸(21)及び上基布緯糸(22)が互いに織られて形成された上基布地部(23)と、前記上基布地部における前記機械方向の一端から突出し、前記上基布経糸が折り返されることによって形成された前側上基布ループ(24)と、前記上基布地部における前記機械方向の他端から突出し、前記上基布経糸が折り返されることによって形成されて、前記前側上基布ループに接合せずに近接し、前記前側上基布ループに対して前記機械方向の後側に位置する後側上基布ループ(25)とを含み、前記後側上基布ループの先端が、前記芯線よりも後方に位置し、前記前側上基布ループの先端及び前記前側下基布ループの先端の前記機械方向の位置が、互いに略等しいことを特徴とする。ここで「前記前側上基布ループの先端及び前記前側下基布ループの先端の前記機械方向の位置が、互いに略等しい」とは、両者の機械方向位置のずれが、上基布経糸の太さ及び下基布経糸の太さの合計値以下である場合を含む。 At least some embodiments of the present invention are a papermaking seam felt (1) comprising a base fabric (2) and a batt fiber layer (3) integrated with said base fabric, said base fabric comprising , a lower base fabric (10), and an upper base fabric (20) superimposed on the upper side of the lower base fabric, the lower base fabric comprising a lower base fabric warp (11) and a lower base fabric weft A lower base fabric part (13) formed by weaving together (12), and a front lower base fabric formed by protruding from one end of the lower base fabric part in the machine direction and folding back the warp threads of the lower base fabric. a loop (14) protruding from the other end of the lower base fabric portion in the machine direction, formed by folding back the lower base fabric warp, and joined to the front lower base fabric loop by a core wire to form the front side a rear lower fabric loop (15) positioned rearward in said machine direction with respect to said lower fabric loop, said upper fabric comprising upper fabric warp yarns (21) and upper fabric weft yarns (22); An upper base fabric portion (23) formed by weaving together, and a front upper base fabric loop (23) protruding from one end of the upper base fabric portion in the machine direction and formed by folding back the upper base fabric warp ( 24), protruding from the other end of the upper base fabric portion in the machine direction, formed by folding back the upper base fabric warp, approaching the front upper base fabric loop without being joined, and the front upper and a rear upper base fabric loop (25) positioned on the rear side in the machine direction with respect to the base fabric loop, the tip of the rear upper base fabric loop being positioned rearward of the core wire and the front side The positions of the ends of the upper base fabric loops and the ends of the front lower base fabric loops in the machine direction are substantially equal to each other. Here, "the positions of the tip of the front upper base fabric loop and the tip of the front lower base fabric loop in the machine direction are substantially equal to each other" means that the deviation of the machine direction positions of the two is equal to the thickness of the upper base fabric warp. Including the case where it is less than the total value of the thickness of the warp and the thickness of the lower base cloth warp.

この構成によれば、後側上基布ループに接合されていない前側上基布ループが、フラップのように下基布のシーム部の大部分又は全体を覆うため、下基布におけるシーム部とその前後の部分との段差が緩和される。そのため、シームマークが抑制され紙面性が向上し、シーム部がロールを通過する時の振動も抑制される。 According to this configuration, since the front upper base fabric loops that are not joined to the rear upper base fabric loops cover most or the entirety of the seam portion of the lower base fabric like a flap, the seam portion of the lower base fabric and the The difference in level between the front and rear portions is alleviated. As a result, seam marks are suppressed, paper surface property is improved, and vibration when the seam portion passes through the rolls is also suppressed.

本発明の少なくともいくつかの実施形態は、上記構成において、前記前側上基布ループ及び前記後側上基布ループの少なくとも一方の厚さ方向の内径は、対応する前記前側下基布ループ又は前記後側下基布ループの厚さ方向の内径よりも小さいことを特徴とする。ここでループの「厚さ方向の内径」とは、ループにおける最も厚さ方向に膨らんだ部分の内縁間の長さをいう。 In at least some embodiments of the present invention, in the above configuration, the inner diameter in the thickness direction of at least one of the front upper base fabric loop and the rear upper base fabric loop is It is characterized by being smaller than the inner diameter in the thickness direction of the back lower base cloth loop. Here, the "inner diameter in the thickness direction" of the loop means the length between the inner edges of the portion of the loop that bulges the most in the thickness direction.

この構成によれば、上基布地部と、前側上基布ループ及び/又は後側上基布ループとの厚さ方向の段差が小さくなり、シームマーク及び振動が抑制される。 According to this configuration, the step in the thickness direction between the upper base fabric portion and the front upper base fabric loop and/or the rear upper base fabric loop is reduced, thereby suppressing seam marks and vibration.

本発明の少なくともいくつかの実施形態は、上記構成のいずれかにおいて、前記前側上基布ループ及び前記後側上基布ループの少なくとも一方は、前記機械方向から見て、厚さ方向に対して15°~65°傾いていることを特徴とする。 In at least some embodiments of the present invention, in any of the above configurations, at least one of the front upper base fabric loop and the rear upper base fabric loop is It is characterized by an inclination of 15° to 65°.

この構成によれば、前側及び/又は後側上基布ループが、機械交差方向に向かって傾斜するため、上基布地部と、前側及び/又は後側上基布ループとの間の段差が抑制される。そのため、シームマーク及び振動が抑制される。また、前側及び/又は後側上基布ループが傾斜することによって、使用時に圧力が加わっても前側及び/又は後側上基布ループの先端が割れ難くなる。 According to this configuration, since the front and/or rear upper base fabric loops are inclined in the cross-machine direction, there is a step between the upper base fabric portion and the front and/or rear upper base fabric loops. Suppressed. Therefore, seam marks and vibration are suppressed. In addition, since the front and/or rear upper base fabric loops are inclined, the ends of the front and/or rear upper base fabric loops are less likely to break even when pressure is applied during use.

本発明の少なくともいくつかの実施形態は、上記構成のいずれかにおいて、前記上基布緯糸は、前記機械方向における前記上基布地部の中央に配置された中央部上基布緯糸(22a)と、前記機械方向における前記上基布地部の両端部にそれぞれ配置された2~8本の端部上基布緯糸(22b)とを含み、前記端部上基布緯糸は、前記中央部上基布緯糸よりも屈曲しやすいことを特徴とする。 In at least some embodiments of the present invention, in any of the above configurations, the upper base cloth weft yarns are center upper base cloth weft yarns (22a) arranged in the center of the upper base cloth portion in the machine direction. , 2 to 8 end upper base fabric wefts (22b) respectively arranged at both ends of the upper base fabric portion in the machine direction, and the end upper base fabric wefts are arranged at the center upper base fabric wefts. It is characterized by being more flexible than cloth wefts.

この構成によれば、端部上基布緯糸が中央部上基布緯糸よりも屈曲しやすいため、前側及び後側上基布ループのクッション性が増大し、シームマーク及び振動が抑制される。 According to this configuration, since the end upper base cloth wefts bend more easily than the central upper base cloth wefts, the cushioning properties of the front and rear upper base cloth loops are increased, and seam marks and vibrations are suppressed.

本発明の少なくともいくつかの実施形態は、上記構成のいずれかの製紙用シームフェルトを製造する方法であって、前記下基布及び前記上基布を製織するステップと、前記前側下基布ループと前記前側上基布ループとが互いに垂直方向に重なるように、前記下基布と前記上基布とを互いに重ねて前記基布を形成し、前記下基布地部及び前記上基布地部における前記前側下基布ループ及び前記前側上基布ループの近傍部分を互いに固定するステップと、互いに接合するべく前記前側下基布ループ及び前記後側下基布ループに下基布仮芯線(25)を挿通し、かつ互いに接合するべく前記前側上基布ループ及び前記後側上基布ループに上基布仮芯線(26)を挿通するステップと、前記基布に短繊維をニードリングして前記バット繊維層を形成するステップと、前記上基布仮芯線を取り除いた後に、前記基布に前記機械方向の張力がかかった状態で、前記基布及び前記バット繊維層を加熱乾燥するステップと、前記下基布仮芯線を取り除き、前記バット繊維層を、前記前側及び後側下基布ループの互いの近接部分、並びに前記前側及び後側上基布ループの互いの重なる部分に沿って切り離して有端状にするステップとを備えることを特徴とする。 At least some embodiments of the present invention provide a method of manufacturing a papermaking seam felt having any of the above configurations, comprising the steps of weaving the lower base fabric and the upper base fabric; and the front upper base fabric loop overlap each other in the vertical direction, forming the base fabric by overlapping the lower base fabric and the upper base fabric, and in the lower base fabric portion and the upper base fabric portion fixing adjacent portions of the front lower backing loop and the front upper backing loop to each other; and lower backing temporary core wires (25) to the front lower backing loop and the back lower backing loop to join together. and inserting an upper base fabric temporary core wire (26) through the front upper base fabric loop and the rear upper base fabric loop to join together; forming a batt fiber layer; and heating and drying the base fabric and the batt fiber layer in a state in which the tension in the machine direction is applied to the base fabric after removing the upper base fabric temporary core wire; The lower backing temporaries are removed, and the batt fibrous layer is separated along adjacent portions of the front and back lower backing loops and overlapping portions of the front and back upper backing loops. and forming an end shape.

この構成によれば、下及び上基布地部の前側を互いに固定し、機械方向の張力がかかった状態で、加熱処理をすることで、前側上基布ループが、下基布のシーム部及び後側上基布ループに対して好ましい位置に配置される。すなわち、前側上基布ループが、下基布のシーム部を上側から覆う位置に配置され、かつ、後側上基布ループに対して側面視で先端がわずかに重なる位置からわずかに前後に離間する位置の間に配置される。 According to this configuration, the front sides of the lower and upper base fabric portions are fixed to each other, and the front upper base fabric loops are formed into the seam portions of the lower base fabric and the It is placed in a preferred position with respect to the back upper backing loops. That is, the front upper base fabric loop is arranged at a position covering the seam portion of the lower base fabric from the upper side, and is slightly spaced forward and backward from the position where the front end slightly overlaps the rear upper base fabric loop in side view. It is placed between the positions where

本発明の少なくともいくつかの実施形態は、上記方法の構成において、前記製織するステップは、前記上基布緯糸を整経糸、前記上基布経糸を打ち込み糸として、製織用芯線(6)で折り返すように前記上基布経糸を前記上基布緯糸に織り込むことを含み、前記前側上基布ループ及び前記後側上基布ループに挿通された前記上基布仮芯線の全体の太さは、前記前側上基布ループ及び前記後側上基布ループに挿通された前記製織用芯線の全体の太さよりも細いことを特徴とする。ここで、芯線(上基布仮芯線又は製織用芯線)の全体の太さとは、それぞれ、芯線が1本の糸からなる場合はその1本の糸の太さであり、芯線が複数本の糸からなる場合は、芯線をその複数の糸が束ねられた1本の糸とみなした場合の太さである。 In at least some embodiments of the present invention, in the structure of the above method, the weaving step includes using the upper base cloth weft yarns as warp yarns and the upper base cloth warp yarns as driving yarns, which are folded back at weaving core wires (6). The total thickness of the upper base fabric temporary core inserted through the front upper base fabric loop and the rear upper base fabric loop is The weaving core wire inserted through the front upper base cloth loop and the rear upper base cloth loop is thinner than the entire thickness of the weaving core wire. Here, the total thickness of the core wire (temporary core wire for upper base fabric or core wire for weaving) is the thickness of one thread when the core wire is made of one thread, and the core wire is made of multiple core wires. In the case of thread, the thickness is the thickness when the core wire is regarded as one thread in which a plurality of threads are bundled.

この構成によれば、上基布仮芯線が製織用芯線よりも細いため、前側及び後側上基布ループが後工程にて製織時よりも小さくなる。 According to this configuration, since the upper base fabric temporary core wire is thinner than the weaving core wire, the front side and the rear side upper base fabric loops are smaller in the subsequent process than during weaving.

本発明の少なくともいくつかの実施形態は、上記方法の構成のいずれかにおいて、互いに固定される前記近傍部分は、前記下基布地部及び前記上基布地部における前記前側下基布ループ及び前記前側上基布ループとの境界から前記機械方向に1cm~20cmの範囲内でミシン縫合されたことを特徴とする。 In at least some embodiments of the present invention, in any of the above method configurations, the adjacent portions secured to each other are the front bottom fabric loop and the front side fabric loop in the bottom fabric portion and the top fabric portion. It is characterized by being sewn by machine within a range of 1 cm to 20 cm in the machine direction from the boundary with the upper base fabric loop.

この構成によれば、前側上基布ループが、完成した製品において、下基布のシーム部及び後側上基布ループに対して好ましい位置に配置される。 With this arrangement, the front upper backing loops are preferably positioned relative to the seams of the lower backing and the back upper backing loops in the finished product.

本発明の少なくともいくつかの実施形態は、上記方法の構成のいずれかにおいて、前記バット繊維層が形成された前記基布に厚さ方向の熱加圧処理を行うステップを更に備えることを特徴とする。 In at least some embodiments of the present invention, in any one of the above method configurations, the base fabric on which the batt fiber layer is formed is further provided with a step of subjecting the base fabric to heat-pressing in the thickness direction. do.

この構成によれば、前側及び後側上基布ループが平坦になり、シームマーク及び振動が更に抑制される。 According to this configuration, the front and rear upper base fabric loops are flattened, further suppressing seam marks and vibration.

本発明によれば、互いに重ね合わされた2枚の基布を有する製紙用シームフェルトの表面性を向上させ、振動を抑制することができる。 ADVANTAGE OF THE INVENTION According to this invention, the surface property of the papermaking seam felt which has two base fabrics mutually superimposed can be improved, and a vibration can be suppressed.

実施形態に係る製紙用シームフェルトのシーム部周辺における緯糸に直交する断面図Sectional view perpendicular to the weft around the seam portion of the papermaking seam felt according to the embodiment 実施形態に係る製紙用シームフェルトの上基布ループの写真(A:機械方向から見た写真、B:機械直交方向から見た写真)Photographs of the upper base fabric loops of the papermaking seam felt according to the embodiment (A: photograph seen from the machine direction, B: photograph seen from the orthogonal direction) 実施形態に係る製紙用シームフェルトの基布の製造方法を示す説明図Explanatory drawing showing the manufacturing method of the base fabric of the papermaking seam felt according to the embodiment. 実施形態に係る製紙用シームフェルトの製造方法を示す説明図Explanatory drawing showing the manufacturing method of the papermaking seam felt according to the embodiment 実施例及び比較例に係る製紙用シームフェルトのシーム部周辺における緯糸に直交する断面の写真Photographs of cross-sections perpendicular to the weft around the seams of the papermaking seam felts according to Examples and Comparative Examples 実施例及び比較例に係る製紙用シームフェルトのシーム部周辺における圧力分布測定の結果を示す写真Photographs showing the results of pressure distribution measurement around the seam portion of the papermaking seam felt according to Examples and Comparative Examples

以下、図面を参照して、本発明に係る実施形態について説明する。図1は、実施形態に係る製紙用シームフェルト(以下、「フェルト」と記す)1におけるシーム部周辺の模式的断面図である。 BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments according to the present invention will be described with reference to the drawings. FIG. 1 is a schematic cross-sectional view around the seam portion of a papermaking seam felt (hereinafter referred to as "felt") 1 according to the embodiment.

フェルト1は、基布2と、基布2に一体化するように短繊維シートをニードリングして形成されたバット繊維層3とを備え、機械方向(丈方向)に無端状になるように接合されて抄紙機に取り付けられる。機械方向(MD方向)とは、フェルト1を抄紙機に取り付けた時に進行する方向であり、機械直交方向(CD方向)とは、機械方向に直交するフェルト1の表面に沿った方向である。経糸及び緯糸は、それぞれ、概ね、機械方向及び機械直交方向に沿って延在する。基布2は、走行面側に配置された下基布10と、下基布10に対して上側に重なるように製紙面側に配置された上基布20とを含むラミネート構造のものである。走行面側を下側、製紙面側を上側と記す。フェルト1は、例えば、パルプ抄造のプレスパートで使用される。 The felt 1 includes a base fabric 2 and a batt fiber layer 3 formed by needling a short fiber sheet so as to be integrated with the base fabric 2, and is endless in the machine direction (longitudinal direction). It is spliced and installed on the paper machine. The machine direction (MD direction) is the direction in which the felt 1 travels when attached to a paper machine, and the cross-machine direction (CD direction) is the direction along the surface of the felt 1 perpendicular to the machine direction. The warp and weft yarns generally extend along the machine and cross-machine directions, respectively. The base fabric 2 has a laminate structure including a lower base fabric 10 arranged on the running surface side and an upper base fabric 20 arranged on the papermaking surface side so as to overlap the lower base cloth 10 on the upper side. . The running surface side is referred to as the lower side, and the paper-making surface side is referred to as the upper side. The felt 1 is used, for example, in the press part of pulp making.

下基布10は、上下同数の2層の下基布経糸11及び1層の下基布緯糸12が互いに織られて形成された下基布地部13と、下基布地部13の一端から突出する複数の前側下基布ループ14と、下基布地部13の機械方向の他端から突出する複数の後側下基布ループ15とを含む。前側下基布ループ14と後側下基布ループ15とが互いにかみ合わされ、芯線4が前側下基布ループ14及び後側下基布ループ15内に挿通されることにより、下基布10は無端状になる。機械方向におけるフェルト1が進行する側を前側、機械方向におけるその反対側を後側と記す。互いに接合された状態において、側面視で(機械直交方向から見て)前側下基布ループ14及び後側下基布ループ15の先端側は互いに重なり、後側下基布ループ15は前側下基布ループ14の後側に位置する。前側下基布ループ14及び後側下基布ループ15は、それぞれ、下基布地部13における機械方向の端部から突出した下基布経糸11が折り返されることによって形成される。前側下基布ループ14及び後側下基布ループ15は、機械方向から見て、概ね、フェルト1の厚さ方向に平行である。 The lower base fabric 10 includes a lower base fabric portion 13 formed by weaving two layers of lower base fabric warp yarns 11 and one layer of lower base fabric weft yarns 12 in the same number above and below, and protruding from one end of the lower base fabric portion 13 . and a plurality of rear lower fabric loops 15 protruding from the other end of the lower fabric portion 13 in the machine direction. The front lower base fabric loop 14 and the rear lower base fabric loop 15 are engaged with each other, and the core wire 4 is inserted into the front lower base fabric loop 14 and the rear lower base fabric loop 15, thereby forming the lower base fabric 10. become endless. The side on which the felt 1 advances in the machine direction is referred to as the front side, and the opposite side in the machine direction is referred to as the rear side. In a state where they are joined to each other, in a side view (as viewed in the direction perpendicular to the machine), the tip sides of the front lower base fabric loop 14 and the rear lower base fabric loop 15 overlap each other, and the rear lower base fabric loop 15 overlaps with the front lower base fabric. Located behind the fabric loop 14 . The front lower base fabric loop 14 and the rear lower base fabric loop 15 are each formed by folding back the lower base fabric warp yarns 11 protruding from the machine direction end of the lower base fabric portion 13 . The front lower backing loops 14 and back lower backing loops 15 are generally parallel to the thickness direction of the felt 1 when viewed in the machine direction.

上基布20は、上下同数の2層の上基布経糸21及び1層の上基布緯糸22が互いに織られて形成された上基布地部23と、上基布地部23の一端から突出する複数の前側上基布ループ24と、上基布地部23の機械方向の他端から突出する複数の後側上基布ループ25とを含む。前側上基布ループ24と後側上基布ループ25とは、互いに接合せずに近接している。側面視で、前側上基布ループ24と後側上基布ループ25とは、互いの先端がわずかに重なった状態、互いの先端が一致する状態、又は互いの先端がわずかに機械方向に離間した状態に位置し、後側上基布ループ25が、前側上基布ループ24の後側に位置する。前側上基布ループ24及び後側上基布ループ25は、それぞれ、上基布地部23における機械方向の端部から突出した上基布経糸21が折り返されることによって形成される。 The upper base cloth 20 includes an upper base cloth portion 23 formed by weaving two layers of upper base cloth warp yarns 21 and one layer of upper base cloth weft yarns 22 in the same number above and below, and protruding from one end of the upper base cloth portion 23. and a plurality of rear upper base fabric loops 25 protruding from the other end of the upper base fabric portion 23 in the machine direction. The front upper base fabric loops 24 and the rear upper base fabric loops 25 are adjacent to each other without joining. When viewed from the side, the front upper base fabric loops 24 and the rear upper base fabric loops 25 are in a state in which their tips slightly overlap each other, their tips coincide with each other, or their tips are slightly separated from each other in the machine direction. The rear upper base fabric loops 25 are positioned behind the front upper base fabric loops 24 . The front upper base cloth loop 24 and the rear upper base cloth loop 25 are each formed by folding back the upper base cloth warp yarns 21 protruding from the machine direction end of the upper base cloth portion 23 .

機械方向において、前側上基布ループ24の先端の位置は、前側下基布ループ14の先端の位置に一致するか、わずかに前後にずれており、好ましくは、一致し、又はわずかに後方にずれている。前側上基布ループ24の先端と前側下基布ループ14の先端との機械方向の位置のずれは、好ましくは、上基布経糸21の太さ及び下基布経糸11の太さの合計値程度以下であり、更に好ましくは、その合計値の0.75倍以下であり、更に好ましくは、その合計値の0.5倍以下である。そのため、前側上基布ループ24の先端が少なくとも芯線4よりも後方に位置し、好ましくは、前側上基布ループ24が芯線4が挿通されて前側下基布ループ14と後側下基布ループ15とが互いに接合したシーム部の全体を上側から覆っており、前側上基布ループ24はフラップのように動いてシーム部を保護する。後側上基布ループ25は、後側下基布ループ15の基端側及びこれに隣接する下基布地部13の端部を上側から覆っている。また、後側上基布ループ25の先端の先端は、前側上基布ループ24の先端に近接し、芯線4よりも後方に位置する。 In the machine direction, the positions of the leading ends of the front upper backing loops 24 are aligned with, or slightly offset anteriorly or posteriorly from, the leading edge positions of the front lower backing loops 14, preferably aligned or slightly trailing. out of alignment. The positional deviation in the machine direction between the tip of the front upper base fabric loop 24 and the tip of the front lower base fabric loop 14 is preferably the sum of the thickness of the upper base fabric warp yarn 21 and the thickness of the lower base fabric warp yarn 11. , more preferably 0.75 times or less of the total value, and still more preferably 0.5 times or less of the total value. Therefore, the tip of the front upper base fabric loop 24 is positioned at least rearward of the core wire 4, and preferably, the front upper base fabric loop 24 is inserted into the front lower base fabric loop 14 and the rear lower base fabric loop so that the core wire 4 is inserted therethrough. 15 covers the entire seam portion joined to each other from the upper side, and the front upper base fabric loop 24 moves like a flap to protect the seam portion. The rear upper base cloth loop 25 covers the base end side of the rear lower base cloth loop 15 and the end portion of the lower base cloth portion 13 adjacent thereto from above. In addition, the tip of the rear upper base fabric loop 25 is close to the tip of the front upper base fabric loop 24 and positioned behind the core wire 4 .

前側上基布ループ24の厚さ方向の内径は、前側下基布ループ14の厚さ方向の内径よりも小さく、後側上基布ループ25の厚さ方向の内径は、後側下基布ループ15の厚さ方向の内径よりも小さい。例えば、前側及び後側上基布ループ24,25の厚さ方向の内径は0.3~0.9mm、前側及び後側下基布ループ14,15の厚さ方向の内径は0.8~1.8mmであることが好ましく、前側及び後側上基布ループ24,25の厚さ方向の内径は、前側及び後側下基布ループ14,15の厚さ方向の内径の半分以下であることが好ましい。なお、前側下基布ループ14及び前側上基布ループ24と、後側下基布ループ15及び後側上基布ループ25とのいずれか一方でのみで、上側の内径が下側よりも小さいという関係が成立してもよい。 The inner diameter of the front upper base fabric loop 24 in the thickness direction is smaller than the inner diameter of the front lower base fabric loop 14 in the thickness direction. It is smaller than the inner diameter of the loop 15 in the thickness direction. For example, the inner diameter in the thickness direction of the front and rear upper base fabric loops 24, 25 is 0.3 to 0.9 mm, and the inner diameter in the thickness direction of the front and rear lower base fabric loops 14, 15 is 0.8 to 0.8 mm. It is preferably 1.8 mm, and the inner diameter in the thickness direction of the front and rear upper fabric loops 24, 25 is less than half the inner diameter in the thickness direction of the front and rear lower fabric loops 14, 15. is preferred. Only one of the front lower base fabric loop 14 and the front upper base fabric loop 24 and the rear lower base fabric loop 15 and the rear upper base fabric loop 25 has an inner diameter smaller than that of the lower side. relationship may be established.

また、前側及び後側上基布ループ24,25は、機械方向を軸にして回転する動きに対してわずかながら自由度があり、プレス加工時又は製品使用時に機械直交方向に平行に近づくように傾く。その角度は、機械方向から見て厚さ方向に対して15°~65°である。15°未満では(より小さいと)傾斜が小さすぎて平滑に近づく効果が得られず、上基布地部23と、前側及び/又は後側上基布ループ24,25との間の段差が抑制されず、シームマーク及び振動が発生する可能性がある。また、使用時に圧力が加わった際に前側及び/又は後側上基布ループ24,25の先端に割れが発生する可能性がある。また65°より大きい傾斜は基布2の構造上実現し難い上に充填糸5を挿入することが困難になってしまう。1つの前側又は後側上基布ループ24,25を形成する上下の経糸11,21は、地部13,23では上下が合わせて織られておりずれる事は無い。しかし、図1及び図2に示すように、前側及び後側上基布ループ24,25の近傍においては、上下の上基布経糸21がそれぞれで別の織組織を形成し分割された2層状態になっていることにより、圧力が掛かった時に前側及び後側上基布ループ24,25によって形成される面が機械直交方向に向かって傾き易くなる。なお、前側及び後側上基布ループ24,25の一方のみが傾いていてもよい。 In addition, the front and rear upper base fabric loops 24 and 25 have a slight degree of freedom with respect to rotational movement around the machine direction, and are arranged so as to approach parallel to the machine orthogonal direction during press working or product use. tilt. The angle is between 15° and 65° with respect to the thickness direction when viewed from the machine direction. If it is less than 15° (if it is smaller), the inclination is too small to obtain the effect of approaching smoothness, and the step between the upper base fabric portion 23 and the front and/or rear upper base fabric loops 24 and 25 is suppressed. seam marks and vibration can occur. Also, when pressure is applied during use, cracks may occur at the tips of the front and/or rear upper base cloth loops 24 and 25 . Further, an inclination of more than 65° is difficult to realize due to the structure of the base fabric 2, and it becomes difficult to insert the filling yarns 5. The upper and lower warp yarns 11, 21 forming one front or rear upper base cloth loop 24, 25 are woven together at the base portions 13, 23 and do not shift. However, as shown in FIGS. 1 and 2, in the vicinity of the front and rear upper base cloth loops 24 and 25, the upper and lower upper base cloth warps 21 form separate woven structures and are divided into two layers. In this state, the surface formed by the front and rear upper fabric loops 24, 25 tends to tilt in the cross-machine direction when pressure is applied. Only one of the front and rear upper base fabric loops 24, 25 may be inclined.

上基布緯糸22は、機械方向における上基布地部23の中央部に配置された中央部上基布緯糸22aと、機械方向における上基布地部23の両端部にそれぞれ配置された端部上基布緯糸22bとを含む。端部上基布緯糸22bは、中央部上基布緯糸22aよりも屈曲(扁平)しやすい糸である。例えば、中央部上基布緯糸22aは、モノフィラメントであり、端部上基布緯糸22bは、中央部上基布緯糸22aと同等の太さを有する、マルチフィラメント、マルチフィラメントの撚糸又はモノフィラメントの撚糸である。端部上基布緯糸22bが中央部上基布緯糸22aよりも屈曲しやすいことにより、前側及び後側上基布ループ24,25のクッション性が向上する。端部上基布緯糸22bは、両端部のそれぞれで、2~8本存在する。 The upper base cloth wefts 22 are composed of central upper base cloth wefts 22a arranged in the central portion of the upper base cloth portion 23 in the machine direction, and end upper base cloth wefts arranged at both ends of the upper base cloth portion 23 in the machine direction. and the base fabric weft 22b. The end upper base cloth wefts 22b are more easily bent (flattened) than the central upper base cloth wefts 22a. For example, the center upper base cloth weft 22a is a monofilament, and the end upper base cloth weft 22b is a multifilament, a multifilament twisted yarn, or a monofilament twisted yarn having the same thickness as the central upper base cloth weft 22a. is. Since the end upper base cloth wefts 22b bend more easily than the central upper base cloth wefts 22a, the cushioning properties of the front and rear upper base cloth loops 24, 25 are improved. There are 2 to 8 end upper base cloth wefts 22b at each end.

1列の前側上基布ループ24内、及び1列の後側上基布ループ25内には、それぞれ、充填糸5を挿通してもよい。前側上基布ループ24及び後側上基布ループ25が機械直交方向に向かって傾くことを阻害しないように、充填糸5は、例えば、マルチフィラメント、マルチフィラメントの撚糸、モノフィラメントの撚糸又は紡績糸等の屈曲しやすい糸を素材とし、その本数は1~4本であることが好ましい。芯線4は、例えばナイロン、ポリアミド、ポリエステル、ポリエチレン、ポリプロピレン、ポリ塩化ビニル等の合成樹脂を素材とし、その本数は5~10本であることが好ましい。充填糸5によって、バット繊維層3の繊維の抜けや、前側及び後側上基布ループ24,25がプレスされた時につぶれすぎることが抑制される。 Filling yarns 5 may be inserted into one row of front upper base fabric loops 24 and one row of rear upper base fabric loops 25, respectively. The filling yarn 5 is, for example, a multifilament, a twisted multifilament yarn, a twisted monofilament yarn, or a spun yarn so as not to hinder the inclination of the front upper base fabric loop 24 and the rear upper base fabric loop 25 toward the orthogonal machine direction. It is preferable that the number of threads is preferably 1 to 4, and the number of the threads is preferably 1 to 4. The core wire 4 is made of, for example, synthetic resin such as nylon, polyamide, polyester, polyethylene, polypropylene, and polyvinyl chloride, and the number of core wires is preferably 5-10. The filling yarns 5 prevent fibers from coming out of the batt fiber layer 3 and prevent the front and rear upper base fabric loops 24 and 25 from being excessively crushed when pressed.

下基布経糸11、下基布緯糸12、上基布経糸21及び上基布緯糸22の素材として、例えば、ナイロン、ポリアミド、ポリエステル、ポリエチレン、ポリプロピレン、ポリ塩化ビニル等の合成樹脂を使用できる。 As materials for the lower base cloth warp yarns 11, the lower base cloth weft yarns 12, the upper base cloth warp yarns 21 and the upper base cloth weft yarns 22, for example, synthetic resins such as nylon, polyamide, polyester, polyethylene, polypropylene and polyvinyl chloride can be used.

図1、図3及び図4を参照して、フェルト1の製造方法を説明する。なお、図4では、下基布緯糸12及び上基布緯糸22の図示を省略している。 A method of manufacturing the felt 1 will be described with reference to FIGS. 4, illustration of the lower base cloth weft 12 and the upper base cloth weft 22 is omitted.

まず、下基布10及び上基布20を製織する。例えば、図3に示すように、下基布緯糸12及び上基布緯糸22を整経糸とし、下基布経糸11及び上基布経糸21を打ち込み糸として、打ち込み糸を製織用芯線6で折り返すように、袋織りで下基布10及び上基布20をそれぞれ製織してもよい。 First, the lower base fabric 10 and the upper base fabric 20 are woven. For example, as shown in FIG. 3, the lower base cloth weft 12 and the upper base cloth weft 22 are set warp yarns, the lower base cloth warp yarn 11 and the upper base cloth warp yarn 21 are set yarns, and the set yarns are turned back at the weaving core wire 6. Similarly, the lower base fabric 10 and the upper base fabric 20 may be woven by tubular weaving.

次に、図4(A)に示すように、前側下基布ループ14と前側上基布ループ24とが互いに重なるように、下基布10と上基布20とを互いに重ねる。更に、後の工程によって、前側下基布ループ14と前側上基布ループ24との互いの前後方向(機械方向)の位置関係がずれないように、下基布地部13及び上基布地部23における前側下基布ループ14及び前側上基布ループ24の近傍部分を互いに固定する。ここで、前後方向において、前側上基布ループ24の先端の位置が、前側下基布ループ14の先端の位置に一致しているか、又はわずかに突出していることが好ましい。また、下基布地部13及び上基布地部23における互いに固定される部分は、前側下基布ループ14及び前側上基布ループ24との境界から機械方向に1cm~20cmの範囲内であることが好ましい。下基布地部13及び上基布地部23の互いの固定は、例えば、ミシン縫いによって実施できる(図4中の符号7は、ミシン糸を示す)。この固定によって、前側上基布ループ24の前側下基布ループ14に対する相対位置が維持される。 Next, as shown in FIG. 4A, the lower base fabric 10 and the upper base fabric 20 are overlapped so that the loops of the lower front base fabric 14 and the loops of the upper front base fabric 24 overlap each other. Furthermore, the lower base fabric portion 13 and the upper base fabric portion 23 are separated from each other so that the positional relationship between the front lower base fabric loops 14 and the front upper base fabric loops 24 in the front-rear direction (machine direction) is not deviated in subsequent steps. , the adjacent portions of the front lower backing loop 14 and the front upper backing loop 24 are fixed together. Here, in the front-rear direction, it is preferable that the position of the tip of the front upper base fabric loop 24 matches the position of the tip of the front lower base fabric loop 14 or projects slightly. In addition, the portions of the lower base fabric part 13 and the upper base fabric part 23 that are fixed to each other are within a range of 1 cm to 20 cm in the machine direction from the boundary between the front lower base fabric loop 14 and the front upper base fabric loop 24. is preferred. The mutual fixation of the lower base fabric part 13 and the upper base fabric part 23 can be performed, for example, by machine sewing (reference numeral 7 in FIG. 4 indicates a sewing thread). This fixation maintains the relative position of the front upper backing loops 24 to the front lower backing loops 14 .

次に、図4(B)に示すように、下基布10及び上基布20のそれぞれの両端部を互いに仮接合する。具体的には、前側下基布ループ14及び後側下基布ループ15を互いにかみ合わせ、前側下基布ループ14及び後側下基布ループ15内に下基布仮芯線16を挿通し、また、前側上基布ループ24及び後側上基布ループ25を互いにかみ合わせ、前側上基布ループ24及び後側上基布ループ25内に上基布仮芯線26を挿通する。上基布仮芯線26は、全体として、製織用芯線6よりも細いことが好ましい。また、上基布仮芯線26の本数は、下基布仮芯線16の本数よりも少ないことが好ましい。 Next, as shown in FIG. 4B, both ends of the lower base fabric 10 and the upper base fabric 20 are temporarily joined together. Specifically, the front lower base fabric loop 14 and the rear lower base fabric loop 15 are engaged with each other, the lower base fabric temporary core 16 is inserted into the front lower base fabric loop 14 and the rear lower base fabric loop 15, and , the front upper base cloth loop 24 and the rear upper base cloth loop 25 are engaged with each other, and the upper base cloth temporary core 26 is inserted through the front upper base cloth loop 24 and the rear upper base cloth loop 25 . The upper base fabric temporary core wire 26 is preferably thinner than the weaving core wire 6 as a whole. Also, the number of the upper base fabric temporary core wires 26 is preferably smaller than the number of the lower base fabric temporary core wires 16 .

次に、図4(B)に示すように、前側上基布ループ24及び後側上基布ループ25のそれぞれの地部寄りの内部空間に充填糸5を挿通する。 Next, as shown in FIG. 4(B), the filling yarn 5 is inserted through the inner spaces of the front upper base fabric loops 24 and the rear upper base fabric loops 25 near the base.

次に、下基布10及び上基布20を含む基布2に、短繊維シートをニードリングしてバット繊維層3を形成する。充填糸5に短繊維がニードリングされることで、充填糸5による短繊維脱落防止の効果十分発揮される。 Next, the short fiber sheet is needled to the base fabric 2 including the lower base fabric 10 and the upper base fabric 20 to form the batt fiber layer 3 . Needling of the short fibers to the filling yarn 5 sufficiently exerts the effect of preventing the short fibers from falling off by the filling yarn 5 .

次に、図4(C)に示すように、上基布仮芯線26を取り除いた後に、基布2及びバット繊維層3を機械方向に張力がかかった状態で加熱乾燥して、基布2の寸法を安定させる。この処理によって、後側上基布ループ25が、前側上基布ループ24に対して後退し、両者の相対位置が、側面視で、両者の先端がわずかに重なった位置、両者の先端が一致する位置、又は両者の先端がわずかに離間した位置になる。また、基布2及びバット繊維層3に対して、厚さ方向の熱加圧処理を更に行い、前側及び後側上基布ループ24,25を平坦にしてもよい。 Next, as shown in FIG. 4(C), after removing the upper base fabric provisional core 26, the base fabric 2 and the batt fiber layer 3 are heated and dried while tension is applied in the machine direction. Stabilize the dimensions of As a result of this process, the rear upper base fabric loop 25 is retracted with respect to the front upper base fabric loop 24, and the relative positions of the two are such that the tips of the two slightly overlap and the tips of the two coincide when viewed from the side. or the position where the tips of both are slightly separated. Further, the base fabric 2 and the batt fiber layer 3 may be subjected to further heat-pressing treatment in the thickness direction to flatten the front and rear upper base fabric loops 24 and 25 .

次に、下基布仮芯線16を取り除き、バット繊維層3を、前側及び後側下基布ループ14,15の互いの近接部分、並びに前側及び後側上基布ループ24,25の互いの重なる部分に沿って切断して有端状とする。 The lower backing temporary core 16 is then removed and the batt fiber layer 3 is separated from the front and back lower backing loops 14, 15 adjacent to each other and the front and back upper backing loops 24, 25 to each other. Cut along the overlapping portion to form a shape with ends.

その後、フェルト1を抄紙機のロールに取り付け、前側及び後側下基布ループ14,15を互いにかみ合わせ、両ループ14,15内に芯線4を挿通してフェルト1の両端部を互いに接合する。芯線4は、下基布仮芯線16と同一のものでも異なるものでもよい。なお、ミシン糸7は、取り除いてもよく、取り除かなくともよい。また、ミシン糸7として水溶性の糸を使用して、製造時の最終工程や製品の使用によってミシン糸7が除去されるようにしてもよい。また、ミシン縫いは1cm~20cmの範囲内に1~4列実施してもよいが、2~3列が好ましい。実施する列数は、上下基布10,20の組み合わせにより適宜選定することができる。列が多すぎると紙面性を悪化させる原因になるため、上下基布10,20を互いに固定できる最低限の列数が好ましい。これらは必ずしも等間隔である必要は無い。 Thereafter, the felt 1 is mounted on a paper machine roll, the front and rear lower fabric loops 14, 15 are engaged with each other, and the core wire 4 is passed through both loops 14, 15 to join the ends of the felt 1 together. The core wire 4 may be the same as or different from the lower base fabric temporary core wire 16 . Note that the sewing thread 7 may or may not be removed. Alternatively, a water-soluble thread may be used as the sewing thread 7 so that the sewing thread 7 is removed in the final manufacturing process or when the product is used. Machine stitching may be performed in 1 to 4 rows within the range of 1 cm to 20 cm, but 2 to 3 rows are preferable. The number of rows to be performed can be appropriately selected depending on the combination of the upper and lower base fabrics 10,20. If there are too many rows, the paper surface property is deteriorated, so the minimum number of rows that can fix the upper and lower base fabrics 10 and 20 to each other is preferable. These are not necessarily evenly spaced.

前側及び後側下基布ループ14,15のシーム部は、芯線4を含んで下基布地部13よりも厚いため、シームマークやフェルト1の走行時の振動の原因となる。しかし、比較的平坦な前側上基布ループ24が、このシーム部をフラップのように覆うため、機械方向に生じる段差の変動が緩和されて、シームマーク及び振動を抑制する。前側上基布ループ24がシーム部をフラップのように覆う構造は、後側上基布ループ25がシーム部を覆う構造に比べて、前側上基布ループ24がめくれ難く、フェルト1の製紙面側の表面の連続性が保たれやすい。 Since the seams of the front and rear lower base cloth loops 14 and 15 are thicker than the lower base cloth portion 13 including the core wire 4, they cause seam marks and vibration of the felt 1 during running. However, since the relatively flat front upper base fabric loop 24 covers this seam like a flap, the variation of the step in the machine direction is mitigated and seam marks and vibrations are suppressed. The structure in which the front upper base fabric loops 24 cover the seam like a flap makes it more difficult for the front upper base fabric loops 24 to turn over compared to the structure in which the rear upper base fabric loops 25 cover the seam. The continuity of the side surface is easily maintained.

前側及び後側下基布ループ14,15は、芯線4を挿通させないため、その厚さ方向の内径を小さくでき、そうすることによって、上基布地部23と、前側及び後側下基布ループ14,15との厚さ方向の段差が小さくなり、シームマーク及び振動を抑制できる。 Since the core wire 4 is not inserted through the front and rear lower base fabric loops 14 and 15, the inner diameter in the thickness direction can be reduced. The step in the thickness direction between 14 and 15 is reduced, and seam marks and vibration can be suppressed.

前側及び後側上基布ループ24,25が、機械交差方向に向かって傾斜するため、上基布地部23と、前側及び後側上基布ループ24,25との厚さの差が縮小して、上基布20に生じる段差が抑制される。そのため、シームマーク及び振動が抑制される。また、前側及び後側上基布ループ24,25が傾斜することによって、使用時に圧力が加わっても前側及び後側上基布ループ24,25の先端が割れ難くなる。 Since the front and rear upper base fabric loops 24, 25 are inclined in the cross-machine direction, the thickness difference between the upper base fabric portion 23 and the front and rear upper base fabric loops 24, 25 is reduced. As a result, a step occurring in the upper base fabric 20 is suppressed. Therefore, seam marks and vibration are suppressed. In addition, since the front and rear upper base cloth loops 24, 25 are inclined, the tips of the front and rear upper base cloth loops 24, 25 are less likely to crack even when pressure is applied during use.

端部上基布緯糸22bが中央部上基布緯糸22aよりも屈曲しやすいため、前側及び後側上基布ループ24,25のクッション性が増大し、シームマーク及び振動が抑制される。 Since the end upper base fabric wefts 22b are more easily bent than the central upper base fabric wefts 22a, the cushioning properties of the front and rear upper base fabric loops 24 and 25 are increased, and seam marks and vibrations are suppressed.

上基布20の両端部は互いに接合されず、下基布10の両端部のみが互いに接合されるため、接合が容易になる。 Since both ends of the upper base fabric 20 are not joined to each other and only both ends of the lower base fabric 10 are joined to each other, joining is facilitated.

図5は、本発明の実施例及び比較例に係るフェルトのシーム部周辺の緯糸に直交する断面の写真である。図5(A)~(C)は、それぞれ、比較例1、実施例1及び実施例2を示す。フェルトは図の右方に向かって進行する。すなわち、図の右側に前側下基布ループ及び前側上基布ループがあり、左側に後側下基布ループ及び前側上基布ループがある。 FIG. 5 is a photograph of a cross section perpendicular to the weft around the seam portion of the felt according to Examples and Comparative Examples of the present invention. 5A to 5C show Comparative Example 1, Example 1 and Example 2, respectively. Felt progresses to the right of the figure. That is, the right side of the figure has the front lower base fabric loop and the front upper base fabric loop, and the left side has the rear lower base fabric loop and the front upper base fabric loop.

比較例1は、下基布と上基布とを互いに固定する時に、下基布地部及び上基布地部の前側端部及び後側端部の双方で互いに固定し、短繊維シートを基布にニードリングする時に、前側及び後側上基布ループ内に、それぞれ充填糸を挿通して製造したフェルトである。実施例1は、下基布と上基布とを互いに固定する時に、下基布地部及び上基布地部の前側端部のみ互いに固定し、ニードリングする時の上基布仮芯線の本数を、下基布仮芯線の本数よりも少なくして製造したフェルトである。実施例2は、実施例1と同様に製造した後、更に、厚さ方向に熱加圧処理を行ったフェルトである。 In Comparative Example 1, when the lower base fabric and the upper base fabric were fixed to each other, both the front and rear ends of the lower base fabric portion and the upper base fabric portion were fixed to each other, and the short fiber sheet was attached to the base fabric. It is a felt manufactured by inserting filler yarns into the front and back upper base fabric loops respectively when needling. In Example 1, when fixing the lower base fabric and the upper base fabric to each other, only the front end portions of the lower base fabric part and the upper base fabric part are fixed to each other, and the number of temporary core wires of the upper base fabric when needling is , a felt manufactured with a smaller number than the number of temporary core wires of the lower base cloth. Example 2 is a felt produced in the same manner as in Example 1 and further subjected to a heat-pressing treatment in the thickness direction.

比較例1では、前側及び後側上基布ループが機械方向に互いに大きく離間した。これは、ニードリング時に生じる上下基布のズレのためであり、ミシン縫いによる固定だけでは前後上基布ループ間の位置関係を保持できないためである。ニードリング時は前後上基布ループ間距離が離れすぎないように上基布ループも仮芯線で接合しておく必要がある。実施例1では、加熱乾燥処理後、前側及び後側上基布ループの先端が側面視で重なる位置まで、後側上基布ループが後退した。実施例2は、実施例1に比べて、前側及び後側上基布ループの厚さ方向の内径が小さくなり、前側及び後側上基布ループが側面視で平坦になった。 In Comparative Example 1, the front and back upper base fabric loops were greatly spaced apart from each other in the machine direction. This is because the upper and lower base fabrics are displaced during needling, and the positional relationship between the front and back upper base fabric loops cannot be maintained only by fixing by machine stitching. At the time of needling, it is necessary to connect the upper base fabric loops with a temporary core wire so that the distance between the front and back upper base fabric loops is not too large. In Example 1, after the heat drying treatment, the rear upper base fabric loops retreated to a position where the tips of the front and rear upper base fabric loops overlapped in side view. In Example 2, the inner diameters in the thickness direction of the front and rear upper base fabric loops were smaller than in Example 1, and the front and rear upper base fabric loops were flattened when viewed from the side.

図6は、本発明の実施例及び比較例に係るフェルトのシーム部周辺の圧力分布測定の結果を示す。図6(A)~(D)は、それぞれ、比較例2、実施例1-1、実施例1-2及び実施例2を示す。フェルトは、図の上方に進行する。 FIG. 6 shows the results of measuring the pressure distribution around the seam of the felt according to the example of the present invention and the comparative example. 6A to 6D show Comparative Example 2, Example 1-1, Example 1-2 and Example 2, respectively. Felt progresses upward in the figure.

図6(A)に示す比較例2は、下基布及び上基布の双方において、両端部が互いに接合されて、下基布及び上基布のシーム部が互いに機械方向にずれたフェルトである。比較例2では、シーム部が2段に重なっているため上基布の芯線跡(矢印aで示す緯方向に濃く延びる部分)がはっきりと表れた。また、シーム部にはバット繊維層の短繊維が絡み難いため、圧力の切れ目(矢印bで示す緯方向に淡く延びる部分)もはっきり表れた。 Comparative Example 2 shown in FIG. 6A is a felt in which both ends of the lower base fabric and the upper base fabric are joined to each other, and the seams of the lower base fabric and the upper base fabric are displaced from each other in the machine direction. be. In Comparative Example 2, since the seam portion overlapped in two stages, traces of core lines of the upper base fabric (portions extending thickly in the weft direction indicated by arrows a) clearly appeared. In addition, since the short fibers of the batt fiber layer are less likely to get entangled in the seam portion, pressure breaks (portions slightly extending in the weft direction indicated by arrow b) also appeared clearly.

図6(B)に示す実施例1-1は、上記の実施例1において、充填糸を前側及び後側上基布ループに挿通していないフェルトである。実施例1-1では、上基布に芯線が無いことに加え、前側上基布ループが、下基布のシーム部をフラップのように覆い、シーム部とその前後の部分との段差を緩和するため、極端な圧力斑は見られなかった。ただし、フェルトのシーム部全体が、その前後の部分に比べてわずかに圧力が低かった。 Example 1-1 shown in FIG. 6(B) is a felt in which the filling yarn is not inserted through the front and rear upper base fabric loops in Example 1 above. In Example 1-1, in addition to the fact that the upper base fabric has no core wire, the front side upper base fabric loop covers the seam portion of the lower base fabric like a flap to reduce the step between the seam portion and the portions in front and behind it. Therefore, extreme pressure spots were not seen. However, the entire felt seam had slightly less pressure than the areas before and after it.

図6(C)に示す実施例1-2は、上記の実施例1において、充填糸を前側及び後側上基布ループに挿通したフェルトである。実施例1-2では、充填糸を前側及び後側上基布ループに挿通したため、フェルトのシーム部全体とその前後の部分との圧力差が、実施例1-1よりも小さかった。 Example 1-2 shown in FIG. 6(C) is a felt in which the filling yarn is inserted through the front and rear upper base fabric loops in Example 1 above. In Example 1-2, since the filling yarn was inserted through the front and rear upper base fabric loops, the pressure difference between the entire felt seam portion and the front and rear portions was smaller than in Example 1-1.

図6(D)に示す実施例2は、上記の実施例2に相当し、充填糸を前側及び後側上基布ループに挿通されたフェルトである。実施例2でも、実施例1-2と同様に、極端な圧力斑は見られず、フェルトのシーム部全体とその前後の部分との圧力差が、実施例1-1よりも小さかった。 Example 2 shown in FIG. 6(D) corresponds to Example 2 above, and is a felt in which filling yarns are inserted through the front and rear upper base fabric loops. In Example 2, as in Example 1-2, extreme pressure unevenness was not observed, and the pressure difference between the entire seam portion of the felt and the portion before and after the seam portion was smaller than in Example 1-1.

以上で具体的実施形態の説明を終えるが、本発明は上記実施形態に限定されることなく幅広く変形実施することができる。上記実施形態では、下基布経糸と上基布経糸との種類及び太さが互いに同じであり、下基布緯糸と上基布緯糸との種類及び太さも互いに同じであったが、互いに異なっていてもよい。 Although the specific embodiments have been described above, the present invention is not limited to the above embodiments and can be widely modified. In the above embodiment, the type and thickness of the lower base cloth warp and the upper base cloth warp are the same, and the type and thickness of the lower base cloth weft and the upper base cloth weft are also the same, but they are different from each other. may be

1:製紙用シームフェルト
2:基布
3:バット繊維層
4:芯線
5:充填糸
6:製織用芯線
7:ミシン糸
10:下基布
11:下基布経糸
12:下基布緯糸
13:下基布地部
14:前側下基布ループ
15:後側下基布ループ
16:下基布仮芯線
20:上基布
21:上基布経糸
22:上基布緯糸
22a:中央部上基布緯糸、22b:端部上基布緯糸
23:上基布地部
24:前側上基布ループ
25:後側上基布ループ
26:上基布仮芯線
1: Seam felt for papermaking 2: Base fabric 3: Batt fiber layer 4: Core wire 5: Filling yarn 6: Core wire for weaving 7: Sewing thread 10: Lower base cloth 11: Lower base cloth warp 12: Lower base cloth weft 13: Lower base fabric portion 14: Front lower base fabric loop 15: Rear lower base fabric loop 16: Lower base fabric temporary core 20: Upper base fabric 21: Upper base fabric warp 22: Upper base fabric weft 22a: Central upper base fabric Weft yarn 22b: end upper base cloth weft yarn 23: upper base cloth portion 24: front upper base cloth loop 25: rear upper base cloth loop 26: upper base cloth temporary core

Claims (7)

基布と、前記基布に一体化されたバット繊維層とを備える製紙用シームフェルトであって、
前記基布は、下基布と、前記下基布に対して上側に重ねて配置された上基布とを含み、
前記下基布は、下基布経糸及び下基布緯糸が互いに織られて形成された下基布地部と、前記下基布地部における機械方向の一端から突出し、前記下基布経糸が折り返されることによって形成された前側下基布ループと、前記下基布地部における前記機械方向の他端から突出し、前記下基布経糸が折り返されることによって形成されて、芯線によって前記前側下基布ループに接合されて、前記前側下基布ループに対して前記機械方向の後側に位置する後側下基布ループとを含み、
前記上基布は、上基布経糸及び上基布緯糸が互いに織られて形成された上基布地部と、前記上基布地部における前記機械方向の一端から突出し、前記上基布経糸が折り返されることによって形成された前側上基布ループと、前記上基布地部における前記機械方向の他端から突出し、前記上基布経糸が折り返されることによって形成されて、前記前側上基布ループに接合せずに近接し、前記前側上基布ループに対して前記機械方向の後側に位置する後側上基布ループとを含み、
前記後側上基布ループの先端が、前記芯線よりも後方に位置し、
前記前側上基布ループの先端及び前記前側下基布ループの先端の前記機械方向の位置が、互いに略等しいことを特徴とする製紙用シームフェルト。
A papermaking seam felt comprising a base fabric and a batt fiber layer integrated with the base fabric,
The base fabric includes a lower base fabric and an upper base fabric arranged over the lower base fabric,
The lower base fabric includes a lower base fabric portion formed by weaving together lower base cloth warps and lower base cloth wefts, and protruding from one end of the lower base cloth portion in the machine direction, and the lower base cloth warps are folded back. and a front lower base fabric loop formed by a core wire protruding from the other end of the lower base fabric portion in the machine direction, and formed by folding back the lower base fabric warp to be attached to the front lower base fabric loop by a core wire. a back bottom backing loop joined and located rearward in the machine direction with respect to the front bottom backing loop;
The upper base fabric includes an upper base fabric portion formed by weaving upper base cloth warps and upper base cloth wefts together, and an upper base cloth portion protruding from one end of the upper base cloth portion in the machine direction so that the upper base cloth warps are folded back. and a front upper base fabric loop formed by joining to the front upper base fabric loop, protruding from the other end of the upper base fabric portion in the machine direction and formed by folding back the upper base fabric warp and joining to the front upper base fabric loop. and a rear upper base fabric loop positioned behind the front upper base fabric loop in the machine direction with respect to the front upper base fabric loop,
The tip of the rear upper base cloth loop is located behind the core wire,
A seam felt for papermaking, wherein the positions of the ends of the front upper base fabric loops and the ends of the front lower base fabric loops in the machine direction are substantially equal to each other.
前記前側上基布ループ及び前記後側上基布ループの少なくとも一方の厚さ方向の内径は、対応する前記前側下基布ループ又は前記後側下基布ループの厚さ方向の内径よりも小さいことを特徴とする請求項1に記載の製紙用シームフェルト。 At least one of the front upper base fabric loop and the rear upper base fabric loop has an inner diameter in the thickness direction smaller than the corresponding inner diameter in the thickness direction of the front lower base fabric loop or the rear lower base fabric loop. The seam felt for papermaking according to claim 1, characterized in that: 前記前側上基布ループ及び前記後側上基布ループの少なくとも一方は、前記機械方向から見て、厚さ方向に対して15°~65°傾いていることを特徴とする請求項1又は2に記載の製紙用シームフェルト。 At least one of the front upper base fabric loop and the rear upper base fabric loop is inclined from 15° to 65° with respect to the thickness direction when viewed from the machine direction. The seam felt for papermaking according to . 前記上基布緯糸は、前記機械方向における前記上基布地部の中央に配置された中央部上基布緯糸と、前記機械方向における前記上基布地部の両端部にそれぞれ配置された2~8本の端部上基布緯糸とを含み、
前記端部上基布緯糸は、前記中央部上基布緯糸よりも屈曲しやすいことを特徴とする請求項1~3のいずれか一項に記載の製紙用シームフェルト。
The upper base cloth wefts are arranged in the machine direction at the center of the upper base cloth portion and 2 to 8 arranged at both ends of the upper base cloth portion in the machine direction. and a book end upper base fabric weft,
The papermaking seam felt according to any one of claims 1 to 3, wherein the end upper base cloth wefts are more easily bent than the central upper base cloth wefts.
請求項1~4のいずれか一項に記載の製紙用シームフェルトを製造する方法であって、
前記下基布及び前記上基布を製織するステップと、
前記前側下基布ループと前記前側上基布ループとが互いに垂直方向に重なるように、前記下基布と前記上基布とを互いに重ねて前記基布を形成し、前記下基布地部及び前記上基布地部における前記前側下基布ループ及び前記前側上基布ループの近傍部分を互いに固定するステップと、
互いに接合するべく前記前側下基布ループ及び前記後側下基布ループに下基布仮芯線を挿通し、かつ互いに接合するべく前記前側上基布ループ及び前記後側上基布ループに上基布仮芯線を挿通するステップと、
前記基布に短繊維をニードリングして前記バット繊維層を形成するステップと、
前記上基布仮芯線を取り除いた後に、前記基布に前記機械方向の張力がかかった状態で、前記基布及び前記バット繊維層を加熱乾燥するステップと、
前記下基布仮芯線を取り除き、前記バット繊維層を、前記前側及び後側下基布ループの互いの近接部分、並びに前記前側及び後側上基布ループの互いの重なる部分に沿って切り離して有端状にするステップとを備えることを特徴とする方法。
A method for producing the papermaking seam felt according to any one of claims 1 to 4,
weaving the lower base fabric and the upper base fabric;
forming the base fabric by overlapping the lower base fabric and the upper base fabric so that the loops of the front lower base fabric and the loops of the front upper base fabric overlap each other in a vertical direction; fixing portions of the upper base fabric portion near the front lower base fabric loop and the front upper base fabric loop to each other;
A lower base fabric temporary core is inserted through the front lower base fabric loop and the rear lower base fabric loop to be joined together, and an upper base fabric is inserted into the front upper base fabric loop and the rear upper base fabric loop to be joined to each other. a step of inserting the cloth temporary core wire;
Needling staple fibers to the base fabric to form the batt fiber layer;
After removing the upper base fabric temporary core wire, heating and drying the base fabric and the batt fiber layer while the tension in the machine direction is applied to the base fabric;
The lower backing temporaries are removed, and the batt fibrous layer is separated along adjacent portions of the front and back lower backing loops and overlapping portions of the front and back upper backing loops. and terminating.
前記製織するステップは、前記上基布緯糸を整経糸、前記上基布経糸を打ち込み糸として、製織用芯線で折り返すように前記上基布経糸を前記上基布緯糸に織り込むことを含み、
前記前側上基布ループ及び前記後側上基布ループに挿通された前記上基布仮芯線の全体の太さは、前記前側上基布ループ及び前記後側上基布ループに挿通された前記製織用芯線の全体の太さよりも細いことを特徴とする請求項5に記載の方法。
The weaving step includes weaving the upper base cloth warps into the upper base cloth wefts by using the upper base cloth wefts as regular warp yarns and the upper base cloth warp yarns as driving yarns so as to fold back at the core line for weaving,
The total thickness of the upper base fabric temporary core inserted through the front upper base fabric loop and the rear upper base fabric loop is determined by the thickness of the upper base fabric temporary core wire inserted through the front upper base fabric loop and the rear upper base fabric loop. 6. A method according to claim 5, characterized in that the thickness is smaller than the total thickness of the weaving core.
前記バット繊維層が形成された前記基布に厚さ方向の熱加圧処理を行うステップを更に備えることを特徴とする請求項5又は6に記載の方法。 7. The method according to claim 5 or 6, further comprising the step of subjecting the base fabric on which the batt fiber layer is formed to heat-pressing treatment in the thickness direction.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007138347A (en) 2005-11-21 2007-06-07 Nippon Felt Co Ltd Papermaking felt with multiple weave seam
JP2008038273A (en) 2006-08-03 2008-02-21 Nippon Felt Co Ltd Multi-layer seamed felt for papermaking and method for producing the same
JP2009041161A (en) 2007-08-10 2009-02-26 Ichikawa Co Ltd Seamed press felt for papermaking, which has multilayered base fabric structure, and method for producing the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007138347A (en) 2005-11-21 2007-06-07 Nippon Felt Co Ltd Papermaking felt with multiple weave seam
JP2008038273A (en) 2006-08-03 2008-02-21 Nippon Felt Co Ltd Multi-layer seamed felt for papermaking and method for producing the same
JP2009041161A (en) 2007-08-10 2009-02-26 Ichikawa Co Ltd Seamed press felt for papermaking, which has multilayered base fabric structure, and method for producing the same

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