JP2005232632A - Net for concentrating pulp and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve high durability resisting to a long-term use by suppressing the break of a net body. <P>SOLUTION: A guide part 7 installed along the edge in the width direction of the net body 6 to regulate the position in the width direction based on a roll of the net body 6 to be wound on the roll is formed by fixing the guide part through an attaching part 11 formed out of a synthetic polymer material to the edge part of the net body so as to be extruded from the edge of the net body so as not to be overlapped with the net body in the thickness direction, and fixing the attaching part to the net body at the overlapped part 13 at which the attaching part and the net body are overlapped by heat-fusing the thermoplastic synthetic polymer material to fill the texture of a woven fabric of the net body therewith. Preferably, a nonoverlapped part 14 at which the net body is not overlapped with the attaching part in the thickness direction is formed between the overlapped part and the guide part. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a pulp concentrating net for compressing and concentrating (dehydrating) pulp, and a method for producing the same, and in particular, in order to define the width direction position of the net main body wound around the roll in an endless manner. The present invention relates to a pulp concentrating net provided with a guide portion along an edge in the width direction thereof and a manufacturing method thereof.

  In the recycling of waste paper, various processes such as disaggregation, deinking, and bleaching are performed, but in the deinking process that separates and removes foreign matter such as ink and clay from the raw paper raw material, it is wound around a roll. Pulp concentrators that squeeze and condense (dehydrate) pulp with a net are used.

  In such a pulp concentrator, the pulp is supplied as a lump of a non-uniform size on the net, so that the load balance in the entire net is lost and the net is liable to skew. Therefore, in order to suppress such skewing of the net, a structure in which a guide body that defines the position in the width direction with respect to the roll is provided along the edge in the width direction of the net is used.

As a net provided with this type of guide body, for example, a structure in which a guide body having a trapezoidal cross section is fixed to a net body by stitching is known (see Patent Document 1). Further, a structure in which a guide body is fixed to a net body by fusion is known (see Patent Documents 2 and 3).
JP-A-2-14090 JP-A-4-361682 JP-A-8-144185

  However, in the net provided with the guide body, a large bending stress is generated in the net body in the vicinity of the guide body in a state of being wound around the outer peripheral surface of the roll, and such a stress state is repeatedly generated during traveling. As a result, the strength of the fiber of the net body is reduced, and the fiber of the net body is cut and unusable after a short period of use.

  For example, in the configuration in which the guide body is fixed to the net body by stitching as described in Patent Document 1, a problem occurs in that the net of the net body is bent in the immediate vicinity of the guide body and the fibers of the net body are cut. On the other hand, in the configuration in which the anti-bending portion is provided integrally with the guide body as described in Patent Documents 2 and 3, it is possible to suppress bending of the net body in the immediate vicinity of the guide body, but reinforcement is applied. The stress concentrates on the boundary between the ground part and the anti-bending part of the mesh body that has not been done, and there is a problem that the fiber of the mesh body cuts along the boundary part, sufficiently satisfying the demand for improved durability Can not do it.

  Further, in the conventional manufacturing method in which the guide body is fixed to the net body by stitching, there are problems in that the manufacturing man-hour is increased and the manufacturing cost is significantly increased. Further, in the conventional manufacturing method in which the guide body is fixed to the net body by fusion, the number of manufacturing steps is relatively small. However, in order to reduce the cost, it is desired to further reduce the number of parts and the number of manufacturing steps.

  The present invention has been devised to solve such problems of the prior art, and its main purpose is high durability that can withstand long-term use by suppressing fiber cutting of the net body. It is another object of the present invention to provide a pulp concentrating net and a method for manufacturing the same, which can be manufactured at a low cost by reducing the number of parts and manufacturing steps.

  In order to solve such a problem, in the present invention, as shown in claim 1, in order to define the position in the width direction of the net body wound around the roll relative to the roll, the edge in the width direction of the net body In the pulp concentrating net provided with a guide portion along the guide body, the guide portion is fixed to an edge portion of the net body through an attachment portion formed of a synthetic polymer material, and the net body and Provided in a manner that protrudes outward from the edge of the net body so as not to overlap in the thickness direction, by filling a thermoplastic synthetic polymer material into the woven structure of the net body by heat melting, It has a superposition part which unifies the attachment part and the net body which mutually overlap in the thickness direction.

  According to this, since the guide part and the net body do not overlap each other, the guide part is easy to move with respect to the net body. Therefore, the load on the net body is reduced, and the net body is prevented from being broken to increase durability. be able to. Moreover, since the synthetic polymer material is filled into the fabric structure of the net body by heat melting, the attachment part and the net body are tightly joined and integrated, so that the guide part moves more than necessary with respect to the net body. And a stable guide function can be secured. In addition, since the fixing is performed by heat melting, high bonding strength can be obtained, and separation between the attachment portion and the net body can be reliably prevented.

  Furthermore, the thermoplastic synthetic polymer material can be easily manufactured simply by heat melting by ultrasonic welding or the like, and since the guide part is formed integrally with the mounting part in advance, the number of parts and manufacturing man-hours are reduced. The manufacturing cost can be reduced because less is required.

  In this case, at least the attachment portion may be formed of a thermoplastic synthetic polymer material, and the material of the attachment portion itself may be filled into the fabric structure of the net body by heat melting. Further, a configuration in which the attachment portion is fixed to the net body by heat melting of an adhesive material made of a thermoplastic synthetic polymer material is also possible.

  In the present invention, as shown in claim 2, a guide portion is provided along an edge in the width direction of the net body in order to define the width direction position of the net body wound around the roll with respect to the roll. In the pulp concentration net, the guide portion is fixed to the edge portion of the net body through an attachment portion formed of a synthetic polymer material so as not to overlap the net body in the thickness direction. Provided in a manner protruding outward from the edge of the net body, and the mounting portion is overlapped and integrated with the net body in the thickness direction between the overlapping portion and the guide portion, A non-polymerized portion that does not overlap the net body in the thickness direction is assumed.

  According to this, since the guide part and the net body do not overlap, the guide part is easy to move with respect to the net body, and in particular, the non-overlapping part between the guide part and the overlapping part is more rigid than the overlapping part. Since the non-polymerized portion is mainly deformed by an external force acting in the vicinity of the guide portion, the load on the net body is reduced, and the durability of the net body is suppressed by suppressing the breakage of the net body. it can.

  In this case, in the polymerization part, the voids in the woven structure of the net body are almost completely filled with the synthetic polymer material, and the synthetic polymer material does not protrude from the surface facing the roll and is flat. It is desirable to be substantially flush with Thereby, sufficient joint strength can be secured and stable running can be secured.

  In the pulp concentration net, as shown in claim 3, an intermediate portion of the overlapping portion adjacent to the ground portion of the net body has an intermediate rigidity between the portion near the guide portion and the ground portion of the net body. The intermediate rigid area | region which shows can be taken. According to this, since the intermediate rigidity region is adjacent to the base portion of the net body that is not filled with the synthetic polymer material, it is possible to avoid a significant change in rigidity at the boundary portion with the base portion of the net body. For this reason, the stress concentration at the boundary portion between the ground portion and the overlapping portion of the net body can be alleviated, thereby suppressing the breakage of the net body and further enhancing the durability.

  In the said pulp concentration net | network, as shown in Claim 4, the intermediate | middle rigidity area | region which shows the intermediate | middle rigidity between the said superposition | polymerization part and the ground part of the said net body was formed in the inner side adjacent to the said superposition | polymerization part. Configuration can be taken. According to this, similarly to the above, since the stress concentration at the boundary portion with the base portion of the net body can be relieved by the intermediate rigid region, the net body can be prevented from being broken and durability can be further enhanced. .

  The intermediate rigid region is formed by reducing the filling rate of the synthetic polymer material filled in the fabric structure of the net body or reducing the thickness of the synthetic polymer material layer formed on the outer surface of the net body. It can also be realized by changing the hardness of the synthetic polymer material itself used.

  In the pulp concentration net, as shown in claim 5, the attachment portion can be configured of a sheet-like composite material in which at least reinforcing yarns extending in the width direction are arranged in a synthetic polymer material. . According to this, since the strength of the attachment portion, particularly the non-polymerized portion can be suppressed and the strength can be increased, the guide function of the guide portion can be enhanced and the durability can be improved.

  In the present invention, as shown in claim 6, a guide portion is provided along an edge in the width direction of the net body in order to define a width direction position of the net body wound around the roll with respect to the roll. In the method for producing a pulp concentrating net, a guide part forming body in which the guide part is integrally formed with the attaching part to the net body in advance using a synthetic polymer material is manufactured, and the guide part and the net body overlap each other. In an embodiment, the attachment portion is overlapped on one surface of the net body, and a thermoplastic synthetic polymer material is thermally melted and filled into a woven structure of the net body, and the attachment portion is fixed to the net body. To do.

  According to this, since the thermoplastic synthetic polymer material can be easily manufactured simply by heat melting by ultrasonic welding or the like, and the guide part is formed integrally with the mounting part in advance, the number of parts and the manufacturing can be improved. Since the number of man-hours can be reduced, the manufacturing cost can be reduced.

  In the method for producing the pulp concentration net, as shown in claim 7, the guide portion forming body is made of a thermoplastic synthetic polymer material, and the synthetic polymer material itself of the attachment portion is melted by heat. The structure which adheres to a net | network main body can be taken. According to this, the number of parts and the number of manufacturing steps can be further reduced.

  In the present invention, as shown in claim 8, a guide portion is provided along an edge in the width direction of the net body in order to define a width direction position of the net body wound around the roll with respect to the roll. In the method for producing a pulp concentrating net, a guide part forming body and a mounting sheet in which the guide part and an attaching part for attaching the guide part to the net body are formed separately from each other with a synthetic polymer material are manufactured. The attachment sheet is fixed to the mesh body in a manner protruding outward from the edge of the mesh body, and the guide is provided on one surface of the end of the attachment sheet so that the guide portion and the mesh body do not overlap. The part forming body was fixed.

  According to this, since the guide part and the mounting part are formed separately, the manufacturing equipment such as a mold is simple, and in particular, the mounting part is a sheet shape in which reinforcing yarns are arranged in a synthetic polymer material. Manufacture is facilitated when made of a composite material.

  In the method for producing a pulp concentration net, as shown in claim 9, the attachment sheet is made of a thermoplastic synthetic polymer material, and the synthetic polymer material itself is thermally melted and fixed to the net body. Configuration can be taken. According to this, it can manufacture simply by heat-melting a thermoplastic synthetic polymer material by ultrasonic welding etc., and can reduce manufacturing cost.

  Thus, according to the present invention, since the guide body and the net body do not overlap with each other, the net body can move easily with respect to the guide part, so the load on the net body is reduced. It can be suppressed, and a great effect is obtained in enhancing durability. In addition, it is only necessary to superimpose the attachment part formed in advance with the guide part on one surface of the net body and heat-seal it by ultrasonic welding or the like, thereby reducing the number of parts and the number of manufacturing steps, thereby reducing the manufacturing cost. it can.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a sectional view schematically showing a pulp concentrator equipped with a pulp concentrating net according to the present invention. This pulp concentrator removes moisture from pulp in a process of separating and removing foreign matters such as ink and clay from waste paper raw materials, and concentrates the endless net 1 according to the present invention into a pair of rolls 2 and 3. It is wrapped around.

  In this pulp concentrator, the pulp is supplied from the supply unit 4 between the roll 2 and the net 1, and the pulp is pressed between the net 1 and the peripheral surfaces of the rolls 2 and 3, so that the moisture in the pulp is the outer surface of the net 1. The pulp discharged to the side and concentrated is collected by the collection unit 5.

  FIG. 2 is a cross-sectional view of the pulp concentration net shown in FIG. 1 cut in the width direction. The net 1 is provided with a guide portion 7 provided along an edge in the width direction of the net body 6 in order to define the width direction position with respect to the rolls 2 and 3, thereby suppressing the skew of the net 1. be able to. The guide portion 7 is provided in a state protruding from the surface facing the outer peripheral surface of the rolls 2 and 3 and is engaged with the end surfaces of the rolls 2 and 3.

  Here, the guide portion 7 is engaged with the end faces of the rolls 2 and 3, but a configuration in which the guide portion 7 is engaged with an annular groove provided on the outer periphery of the rolls 2 and 3 is also possible.

  FIG. 3 shows a first embodiment of the pulp concentration net shown in FIG. (A) shows a cross section in a state before assembly, (B) shows a cross section in a completed state, and (C) and (D) show changes in rigidity. The guide portion 7 is formed integrally with the synthetic polymer material of the attachment portion 11 with respect to the edge portion of the net body 6 and faces outward from the edge of the net body 6 so as not to overlap the net body 6 in the thickness direction. It is provided in a manner protruding. Here, the guide part 7 has a trapezoidal cross section, and the attachment part 11 has a flat plate shape.

  The guide portion forming body 12 having an L-shaped cross section integrally formed with the attachment portion 11 is made of a thermoplastic synthetic polymer material, and the synthetic polymer material itself of the attachment portion 11 is thermally melted by ultrasonic welding. The attachment portion 11 is fixed to the net body 6 by filling the mesh structure of the net body 6. In particular, here, the surface 11a of the mounting portion 11 on which the guide portion 7 protrudes is superposed on the surface 6b of the net body 6 opposite to the surface 6a opposite to the rolls 2 and 3 and is heat-welded.

  The guide part forming body 12 is made of, for example, thermoplastic polyurethane, and can be obtained by extrusion molding.

  A non-overlapping portion 14 that does not overlap the net body 6 in the thickness direction is provided between the overlapping portion 13 and the guide portion 7 where the attachment portion 11 and the net body 6 overlap. The non-polymerized portion 14 may be secured within a range of, for example, 0 to 50 mm, and a form in which the non-polymerized portion 14 is not provided is also possible. Moreover, what is necessary is just to ensure the superposition | polymerization part 13 in the range of 10 mm-50 mm, for example.

  In the superposition part 13, the synthetic polymer material of the attachment part 11 is melted by heat and filled in the fabric structure of the net body 6, thereby exhibiting higher rigidity than the ground part of the net body 6. Changes according to the material characteristics of the guide portion forming body 12 and the filling amount into the net body 6 and is set to have appropriate rigidity.

  FIG. 3C shows a case where the guide portion forming body 12 is formed of a relatively hard synthetic polymer material, and the non-polymerized portion 14 exhibits higher rigidity than the ground portion of the net body 6. In this case, since the rigidity largely changes at the boundary portion between the overlapping portion 13 and the ground portion of the net body 6, it is preferable to form an intermediate rigidity region at the boundary portion with the ground portion of the net body 6 as described later.

  FIG. 3D shows a case where the guide portion forming body 12 is formed of a relatively soft synthetic polymer material, and the non-polymerized portion 14 has lower rigidity than the ground portion of the net body 6. In this case, since the non-overlapping portion 14 is the most flexible, the non-overlapping portion 14 is mainly deformed by an external force acting in the vicinity of the guide portion 7, so that the load on the net body 6 is reduced.

  Further, here, the surface 14a of the non-overlapping portion 14 on which the guide portion 7 protrudes and the surface 6a of the net body 6 are flush with each other, and the end surface 6c side of the net body is entirely buried in the mounting portion 11. However, a configuration in which a part of the net body on the side of the end face 6c is buried in the attachment portion 11 is also possible.

  In the superposition | polymerization part 13, a synthetic polymer material reaches | attains the surface 6a of the side opposite to the side with which a synthetic polymer material is filled, ie, the side facing rolls 2 and 3, and in the textile structure of the net body 6 It is preferable that the gap is almost completely filled with the synthetic polymer material. However, in order to ensure smooth running of the net, the synthetic polymer material does not protrude from the surface 6a facing the rolls 2 and 3 and is flat. It is desirable to be

  FIG. 4 shows in detail the main part of the pulp concentration net shown in FIG. The net body 6 has a triple woven fabric structure, more specifically, a triple woven fabric structure composed of upper and lower two layers. The warp yarn 101 and the weft yarn 102 constituting the surface structure on the side to which the pulp is supplied are made of, for example, polyester monofilament. On the other hand, the warp yarn 103 constituting the back surface structure is made of, for example, polyester monofilament, and the weft 104 of the back surface structure is made of a monofilament of a polyamide-based synthetic resin material that is rich in flexibility. In addition, the textile structure of the net body in the present invention is not limited to this.

  FIG. 5 shows a second embodiment of the pulp concentration net shown in FIG. (A) shows a cross section in a state before assembly, (B) shows a cross section in a completed state, and (C) shows a change in rigidity. Here, as in the above example, the attachment portion 21 formed in advance integrally with the guide portion 7 by a thermoplastic synthetic polymer material is fixed to the net body 6 by heat melting. In contrast, a tapered portion 25 having a tapered cross section that gradually decreases in thickness toward the inside is provided in an inner portion of the attachment portion 21, and the inner side of the overlapping portion 23 corresponds to the tapered portion 25. In this portion, since the amount of the synthetic polymer material filled in the net body 6 is reduced, an intermediate rigidity region 27 showing intermediate rigidity between the ground portion of the net body 6 and the portion near the guide portion 7 is formed.

  In the intermediate rigidity region 27, the filling rate of the synthetic polymer material into the net body 6 by heat melting gradually decreases inward according to the thickness change of the tapered portion 25, so that the rigidity gradually increases inward. The characteristic which becomes low can be shown, and it can avoid that a rigidity changes a lot by the boundary part with the ground part of the net body 6 by this. The guide part forming body 22 having an L-shaped cross section composed of the guide part 7 and the attachment part 21 may be made of thermoplastic polyurethane as in the above example.

  FIG. 6 shows a third embodiment of the pulp concentration net shown in FIG. (A) shows the top surface of the guide part forming body, (B) shows the cross section before assembly, (C) shows the cross section in the completed state, and (D) shows the change of rigidity. Here, as in the above example, the attachment part 31 formed in advance integrally with the guide part 7 by the thermoplastic synthetic polymer material is fixed to the net body 6 by heat melting. In contrast, a mesh portion 35 is provided in the inner portion of the attachment portion 31, and the filling amount of the synthetic polymer material into the mesh body 6 in the inner portion of the overlapping portion 33 corresponding to the mesh portion 35. Therefore, an intermediate rigidity region 37 showing intermediate rigidity between the ground portion of the net body 6 and the portion near the guide portion 7 is formed.

  In the intermediate rigid region 37, a portion not filled with the synthetic polymer material is formed corresponding to the opening of the mesh portion 35, and water permeability can be secured here, so the width of the intermediate rigid region 37 is widened. Even with this configuration, a significant decrease in concentration (dehydration) capacity can be avoided.

  In the intermediate rigidity region 37, it is possible to set an appropriate rigidity according to use conditions by changing the aperture ratio of the mesh portion 35. Further, the mesh portion 35 can be configured to gradually increase the opening ratio toward the inside, for example, the diameter of the opening gradually. In this case, as in the above example, the inside portion 37 is directed toward the inside. Thus, the rigidity can be gradually lowered. In addition, the guide part formation body 32 which makes the L-shaped cross section which consists of the guide part 7 and the attachment part 31 should just consist of thermoplastic polyurethane like the said example.

  FIG. 7 shows a fourth embodiment of the pulp concentration net shown in FIG. (A) shows a cross section in a state before assembly, (B) shows a cross section in a completed state, and (C) shows a change in rigidity. Here, as in the above example, the mounting portion 41 formed integrally with the guide portion 7 in advance using a thermoplastic synthetic polymer material is fixed to the net body 6 by heat melting. In contrast, a reinforcing sheet 45 made of a synthetic polymer material softer than the material forming the attachment portion 41 is fixed to the net body 6 by heat melting, adjacent to the attachment portion 41 and inside thereof.

  In the portion to which the reinforcing sheet 45 is fixed, the synthetic polymer material of the reinforcing sheet 45 is thermally melted and filled into the woven fabric structure of the net body 6 in the same manner as the polymerization portion 43. Therefore, an intermediate rigidity region 47 having lower rigidity than the overlapped portion 43 is formed. The guide portion forming body 42 having an L-shaped cross section composed of the guide portion 7 and the mounting portion 41 is made of polyurethane, and the reinforcing sheet 45 is made of polyurethane softer than the guide portion forming body 42. It ’s fine.

  In addition, the reinforcing sheet can be configured to have a tapered cross-section whose thickness gradually decreases inward, a configuration in which the thickness is smaller than that of the attachment portion 41, or a configuration in which the reinforcing sheet is formed in a mesh shape with a large number of openings. is there.

  FIG. 8 shows a fifth embodiment of the pulp concentration net shown in FIG. (A) shows a cross section in a state before assembly, and (B) shows a cross section in a completed state. Here, as in the above example, the attachment portion 51 is previously formed integrally with the guide portion 7 from a synthetic polymer material. However, unlike the above example, the attachment portion 51 is made of a thermoplastic synthetic polymer. It is fixed to the net body 6 through a heat-weldable adhesive sheet 56 made of a material.

  In the overlapping portion 53 where the attachment portion 51 and the net body 6 overlap, the synthetic polymer material of the adhesive sheet 56 is thermally melted and filled into the woven fabric structure of the net body 6, and the synthetic height filled in this woven fabric structure is filled. Due to the molecular material and the attachment portion 51 fixed to the outer surface thereof, the overlapping portion 53 exhibits higher rigidity than the ground portion of the net body 6. The change in rigidity in this configuration is the same as in the example shown in FIG.

  The adhesive sheet 56 is a synthetic polymer material (for example, softened) having a softening point lower than that of the L-shaped guide portion forming body 52 (for example, polyurethane having a softening point of 230 ° C.) in which the guide portion 7 and the mounting portion 51 are integrally formed. (Polyurethane having a point of 140 ° C.) makes it possible to lower the welding temperature, thereby suppressing wrinkles generated in the net body 6 after heat welding.

  Even in this configuration, by using a plurality of adhesive sheets made of synthetic polymer materials having different hardnesses, it is possible to form an intermediate rigid region in the overlapping portion, and the thickness of the adhesive sheet can be changed to create a woven fabric. It is also possible to form an intermediate rigid region in the overlapping portion depending on the amount of filling into the tissue.

  FIG. 9 shows a sixth embodiment of the pulp concentration net shown in FIG. (A) shows a cross section in a state before assembly, and (B) shows a cross section in a completed state. Here, as in the above example, the attachment portion 61 formed integrally with the guide portion 7 in advance using a synthetic polymer material is fixed to the net body 6 via a heat-weldable adhesive sheet 66. Unlike the example, the reinforcing sheet 65 is fixed to the net body 6 via the adhesive sheet 66 on the inner side adjacent to the attachment portion 61.

  The reinforcing sheet 65 is formed of a synthetic polymer material that is softer than the synthetic polymer material of the mounting portion 61, and the portion to which the reinforcing sheet 65 is fixed has lower rigidity than the overlapping portion 63 to which the mounting portion 61 is fixed. An intermediate rigid region 67 is formed. The change in rigidity in this configuration is the same as in the example shown in FIG.

  The guide part forming body 62 having an L-shaped cross section composed of the guide part 7 and the attaching part 61 is made of polyurethane, and the reinforcing sheet 65 is made of a softer grade polyurethane than the guide part forming body 62. What should I do?

  In addition, the attachment by the heat-weldable adhesive sheet is only the attachment portion 61, and the reinforcing sheet forming the intermediate rigid region is fixed to the net body 6 by the thermal melting of the reinforcing sheet itself made of a thermoplastic synthetic polymer material. It may be a thing. On the contrary, the guide portion forming body is formed of a thermoplastic synthetic polymer material and fixed to the net body 6 by the heat melting of the mounting portion itself, as in the case shown in FIG. The reinforcing sheet may be fixed to the net body 6 via a heat-weldable adhesive sheet. Further, the reinforcing sheet may be configured to be fixed to the net body by a liquid adhesive such as a two-component or solvent type.

  FIG. 10 shows a seventh embodiment of the pulp concentration net shown in FIG. (A) shows a cross section in a state before assembly, and (B) shows a cross section in a completed state. Here, unlike the above-described example, the guide portion 7 and the attachment portion 71 for the net body 6 are formed from the guide portion forming body 72 and the attachment sheet 75 which are separately formed of a thermoplastic synthetic polymer material. After fixing the attachment sheet 75 to the net body 6 in a manner protruding outward from the edge of the net body, the guide part forming body 72 is fixed to one surface of the end part of the attachment sheet 75, thereby 7 is formed so as not to overlap the net body 6.

  FIG. 11 is an enlarged view of the attachment sheet shown in FIG. The attachment sheet 75 is made of a sheet-like composite material having reinforcing yarns 81 to 84 in a synthetic polymer material (matrix resin). More specifically, the attachment sheet 75 is formed on the base fabric 85 made of the reinforcing yarns 81 to 84. A composite material layer 86 impregnated with the material and a film layer 87 made of a synthetic polymer material (polyurethane) are laminated. The woven fabric 85 of the composite material layer 86 includes lengthwise direction yarns (warp yarns) 81 and 83 and widthwise direction yarns (weft yarns) 82 and 84. A plurality of woven fabrics are laminated. Reinforcing yarns 81-84 are preferably polyurethane or polyester. In addition, polyamides such as nylon, PEEK, and aramid fibers such as Kevlar (manufactured by DuPont) may be used as long as they can suppress elongation and improve strength. Is possible.

  FIG. 12 shows in detail the main part of the pulp concentration net shown in FIG. In the superposition part 73 where the net body 6 and the attachment part 71 overlap each other in the thickness direction, the synthetic polymer material of the film layer 87 of the attachment sheet 75 is melted by heat and filled into the woven fabric structure of the net body 6. 75 base fabrics 85 and the net body 6 overlap each other. In the non-polymerized portion 74 in which the net body 6 and the attachment portion 71 do not overlap in the thickness direction, the elongation is suppressed and the strength is increased by the base fabric 85 of the attachment sheet 75. In the guide part 7, the film layer 87 of the attachment sheet 75 and the guide part forming body 72 are fixed by heat melting. The guide portion forming body 72 may be configured to be fixed to the attachment sheet 75 with a liquid adhesive such as a two-component type or a solvent type.

  FIG. 13 shows a modification of the mounting sheet shown in FIG. A mounting sheet 111 shown in FIG. 13A includes a composite material layer 112 and a film layer 113 in which reinforcing yarns 115 to 118 are disposed in a synthetic polymer material. -117 and the thread | yarn 116 * 118 of the width direction are arranged in the aspect which is not mutually intertwined. A mounting sheet 121 shown in FIG. 13B includes a composite material layer 122 and a film layer 123 in which reinforcing yarns 125 and 126 are disposed in a synthetic polymer material. In the composite material layer 122, the reinforcing yarns in the width direction are formed. Only 125 and 126 are arranged.

  FIG. 14 shows an eighth embodiment of the pulp concentration net shown in FIG. (A) shows a cross section in a state before assembly, and (B) shows a cross section in a completed state. Here, as in the above example, the mounting portion 71 is formed of a mounting sheet 75 made of a sheet-like composite material having a reinforcing thread in a synthetic polymer material. Unlike the above example, the guide portion 7 The guide part forming body 131 is made of a non-woven fiber assembly.

  The guide portion forming body 131 is formed by adhesively bonding the constituent fibers of the nonwoven fiber assembly with a fiber binding material (binder). After the nonwoven fiber assembly is formed by needle punching, this nonwoven fabric assembly is formed. It is produced by impregnating a fiber assembly with a fiber binding material.

  For example, polyester fibers excellent in shape retention performance are suitable for the constituent fibers of the nonwoven fiber aggregate. On the other hand, as the fiber binding material, a synthetic polymer material that is familiar with the constituent fibers and excellent in adhesiveness may be used. Further, the mechanical properties such as the elasticity of the guide part forming body 131 can be changed depending on the material and the amount of the fiber bonding material, and therefore, it may be selected as appropriate according to the performance required for the guide part 7.

  The guide portion forming body 131 is fixed to the mounting sheet 75 by an adhesive 132 whose initial state is liquid like a two-component or solvent type. The adhesive 132 is partially filled in the gap of the guide part forming body 131, and the guide part forming body 131 and the attachment sheet 75 are joined. As the adhesive 132, a polyurethane-based material excellent in extensibility and durability is suitable. Further, the guide portion forming body 131 is stitched to the attachment sheet 75 with the suture 133, so that the guide portion forming body 131 can be firmly fixed to the attachment sheet 75 and the collapse of the tissue of the guide portion forming body 131 is suppressed. can do.

  In the above example, the synthetic polymer material used for the guide part forming body having the L-shaped cross section composed of the guide part and the attachment part, the reinforcing sheet, and the adhesive sheet is polyurethane. For example, polyvinyl chloride, polyamide (nylon), polyester, and the like are also possible. In particular, polyurethane is excellent in terms of mechanical strength and wear resistance, and also has good adhesion to the textile fibers (polyester) of the net body.

  Similarly to the example shown in FIG. 3, the mounting part of the guide part forming body having an L-shaped cross section in which the guide part and the mounting part are integrally formed is formed in the synthetic polymer material in the same manner as the mounting sheet. It is also possible to adopt a configuration in which a reinforcing thread is included in the structure. Further, a mode in which an attachment sheet made of a sheet-like composite material having a reinforcing thread in a synthetic polymer material is fixed to the net body through a heat-weldable adhesive sheet as in the example shown in FIG. Furthermore, a mode in which reinforcing yarns are partially arranged on the outer part of the attachment part is also possible, and this forms a tapered part or a mesh part on the inner part of the attachment part as shown in FIGS. Convenient if you want to.

  The pulp concentrating net according to the present invention has an effect of effectively suppressing breakage of the net body and enhancing durability, and is used by being attached to a pulp concentrator that compresses and concentrates (dehydrates) pulp. Useful for. Further, the method for producing a pulp concentration net according to the present invention is useful for use in producing the pulp concentration net having the above-described configuration.

It is sectional drawing which shows typically the pulp concentration machine with which the net | network for pulp concentration by this invention is mounted | worn. It is sectional drawing which cut | disconnected the net for pulp concentration shown in FIG. 1 in the width direction. It is a conceptual diagram which shows 1st Embodiment of the net for pulp concentration shown in FIG. It is sectional drawing which shows the principal part of the mesh for pulp concentration shown in FIG. 3 in detail. It is a figure which shows 2nd Embodiment of the mesh for pulp concentration shown in FIG. It is a conceptual diagram which shows 3rd Embodiment of the pulp concentration net | network shown in FIG. It is a conceptual diagram which shows 4th Embodiment of the net for pulp concentration shown in FIG. It is a conceptual diagram which shows 5th Embodiment of the pulp concentration net | network shown in FIG. It is a conceptual diagram which shows 6th Embodiment of the net | network for pulp concentration shown in FIG. It is a conceptual diagram which shows 7th Embodiment of the net for pulp concentration shown in FIG. It is sectional drawing which expands and shows the attachment sheet | seat shown in FIG. It is sectional drawing which shows the principal part of the mesh for pulp concentration shown in FIG. 10 in detail. It is sectional drawing which shows the modification of the attachment sheet | seat shown in FIG. It is a conceptual diagram which shows 8th Embodiment of the net | network for pulp concentration shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Net | network 2/3 Roll 6 Net | network main body 7 Guide part 11,21,31,41,51,61,71 Attachment part 12,22,32,42,52,62,72 Guide part formation body 13,23,33, 43, 53, 63, 73 Superposed part 14, 24, 34, 44, 54, 64, 74 Non-polymerized part 25 Tapered part 35 Mesh part 45, 65 Reinforcement sheet 56, 66 Adhesive sheet 27, 37, 47, 67 Intermediate rigidity region 75 Mounting sheet 131 Guide portion forming body

Claims (9)

In order to define the width direction position of the net body wound around the roll with respect to the roll, a pulp concentrating net provided with a guide portion along an edge in the width direction of the net body,
The edge of the mesh body is fixed to the edge portion of the mesh body through an attachment portion formed of a synthetic polymer material so that the guide portion does not overlap the mesh body in the thickness direction. Provided in a manner protruding outward from
It has a superposition part which unifies the above-mentioned attachment part and the above-mentioned net body which overlap mutually in the thickness direction by filling the textile composition of the above-mentioned net body by heat fusion with thermoplastic synthetic polymer material, Pulp concentration net. In order to define the width direction position of the net body wound around the roll with respect to the roll, a pulp concentrating net provided with a guide portion along an edge in the width direction of the net body,
The edge of the mesh body is fixed to the edge portion of the mesh body through an attachment portion formed of a synthetic polymer material so that the guide portion does not overlap the mesh body in the thickness direction. Provided in a manner protruding outward from
The attachment portion has a non-overlapping portion that does not overlap in the thickness direction with the mesh body between the guide portion and the overlapping portion that is integrated with the mesh body in the thickness direction. Pulp concentration net.   An intermediate rigidity region showing intermediate rigidity between the portion near the guide portion and the ground portion of the mesh body is formed in an inner portion adjacent to the ground portion of the mesh body in the overlapping portion. Item 3. A pulp concentration net according to item 1 or item 2.   The intermediate stiffness region showing intermediate stiffness between the superposed portion and the ground portion of the net body is formed adjacent to the superposed portion and inside thereof. Pulp concentrating net.   The pulp attachment according to any one of claims 1 to 4, wherein the attachment portion is made of a sheet-like composite material in which reinforcing yarns extending at least in the width direction are arranged in a synthetic polymer material. network. In order to define the width direction position of the net body wound around the roll with respect to the roll, a method for producing a pulp concentrating net provided with a guide portion along an edge in the width direction of the net body,
A guide part forming body in which the guide part is integrally formed with the attaching part to the net body in advance with a synthetic polymer material is manufactured, and the attaching part is formed in a manner in which the guide part and the net body do not overlap. A pulp for concentrating, characterized in that it is superposed on one surface of a net body, a thermoplastic synthetic polymer material is thermally melted and filled into a woven structure of the net body, and the attachment portion is fixed to the net body. A method of manufacturing a net. The pulp concentration according to claim 6, wherein the guide portion forming body is made of a thermoplastic synthetic polymer material, and the synthetic polymer material itself of the attachment portion is thermally melted and fixed to the net body. A method for manufacturing a net. In order to define the width direction position of the net body wound around the roll with respect to the roll, a method for producing a pulp concentrating net provided with a guide portion along an edge in the width direction of the net body,
A guide part forming body and a mounting sheet, in which the guide part and a mounting part for attaching the guide part to the net body are separately formed of a synthetic polymer material, are manufactured, and the mounting sheet is attached to an edge of the net body. The guide body forming body is fixed to one surface of the end portion of the mounting sheet so that the guide body and the net body do not overlap with each other in a manner protruding outward from the net body. A method for producing a pulp concentration net. The method for producing a mesh for concentrating a pulp according to claim 8, wherein the attachment sheet is made of a thermoplastic synthetic polymer material, and the synthetic polymer material itself is thermally melted and fixed to the net body. .

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