阅读说明：本技术 一种用于造纸机干燥部的聚酯植绒干网 (Polyester flocking dry net for drying part of paper machine ) 是由 刘言 刘敏 何红梅 刘其松 胡莉萍 于 2020-12-23 设计创作，主要内容包括：本发明公开了一种用于造纸机干燥部的聚酯植绒干网,其特征在于,从上至下依次包括贴纸面纤维层、干网层、底层纤维层,所述干网层包括经线和纬线,所述纬线包括支撑纬线和功能纬线。本发明提供一种用于造纸机干燥部的聚酯植绒干网,采用聚酯螺旋干网作为基网,在其正反面同时植入一定细度和数量的耐高温短纤维和羊毛,它是将针刺型干毯和聚酯干网的优点集于一体的复合高性能产品。不仅具有透气度大、无网痕等优点,其干网层置入的耐高温短纤维不易脱落,使用效果好,设备运行稳定,使用寿命长。(The invention discloses a polyester flocking dry net for a drying part of a paper machine, which is characterized by sequentially comprising a paper pasting surface fiber layer, a dry net layer and a bottom layer fiber layer from top to bottom, wherein the dry net layer comprises warps and wefts, and the wefts comprise supporting wefts and functional wefts. The invention provides a polyester flocking dry net for a drying part of a paper machine, which adopts a polyester spiral dry net as a basic net, and high-temperature resistant short fibers and wool with certain fineness and quantity are simultaneously implanted into the front side and the back side of the polyester spiral dry net. The high-temperature-resistant short fiber built-in dry net layer has the advantages of high air permeability, no net mark and the like, and the high-temperature-resistant short fiber built-in dry net layer is not easy to fall off, so that the use effect is good, the equipment runs stably, and the service life is long.)

1. A polyester flocking dry net for a drying part of a paper machine is characterized by comprising a paper pasting face fiber layer (1), a dry net layer (2) and a bottom layer fiber layer (3) from top to bottom in sequence, wherein the dry net layer (2) comprises warps (21) and wefts (22), the wefts (22) comprise supporting wefts (221) and functional wefts (222), one functional weft (222) is arranged between every two adjacent supporting wefts (221), the warps (21) are spirally wound on the outer sides of the two adjacent supporting wefts (221), and the warps (21) are abutted against one side of the functional wefts (222) when passing through the functional wefts (222); when the warp (21) passes through the supporting weft (221) and the functional weft (222) twice, the contact end of the warp (21) and the supporting weft (221) and the contact end of the warp (21) and the functional weft (222) are located on different sides; and when the warp (21) passes through the functional weft (222) twice, the contact ends are positioned on different sides, so that the warp (21) plays a role in clamping the functional weft (222).

2. A polyester flocking dry wire for the drying section of a paper machine according to claim 1, characterized in that the warp threads (21) are high temperature resistant polyester fibres with a diameter of 0.8-1.0 mm.

3. A polyester flocking dry wire for the drying section of a paper machine according to claim 1, characterized in that the functional weft (222) is a high temperature resistant spun yarn.

4. A polyester flocking dry net for the drying section of a paper machine according to claim 3, characterized in that the functional weft (222) comprises a yarn core (223), an inner yarn layer (224) and an outer yarn layer (225), the inner yarn layer (224) being wrapped outside the yarn core (223) and the outer yarn layer (225) being wrapped outside the inner yarn layer (224).

5. A polyester flocking dry wire for the dry end of a paper machine according to claim 4 wherein the inner yarn layer (224) comprises a plurality of first yarns (226), adjacent ones of the first yarns (226) abutting each other, the plurality of first yarns (226) being arranged side by side to form an annular sleeve.

6. A polyester flocking dry net for the drying section of a paper machine according to claim 5, characterized in that the outer yarn layer (224) comprises second (227) and third (228) yarns, the second (227) and third (228) yarns being wound in a double spiral outside the inner yarn layer (224).

7. A polyester flocking dry wire for the dry end of a paper machine according to claim 6, wherein the core (223) is Nomex fire retardant fiber and the first (226), second (227) and third (228) yarns are high wet modulus viscose.

8. A polyester flocking dry wire for the drying section of a paper machine according to claim 1, characterized in that the paper-facing (1) and the bottom (3) fibrous layers are pierced by a needle-punching process into the upper and lower surfaces of the supporting weft (221), functional weft (222), respectively.

9. A polyester flocking dry wire for the drying section of a paper machine according to claim 1, characterized in that the paper-facing layer (1) and the bottom layer (3) are pierced into the upper and lower surfaces of the functional weft threads (222), respectively, by a needle-punching process.

10. A polyester flocking dry wire for the drying section of a paper machine according to claim 1, characterized in that the paper-facing layer (1) and the bottom layer (3) are both a mixture of synthetic chemical fibres and wool.

Technical Field

The invention relates to the technical field of papermaking drying, in particular to a polyester flocking dry net for a drying part of a papermaking machine.

Background

The paper-making dry net is a carrier for paper web running in the drying part, and has the functions of conveying paper sheets, improving heat transfer and flattening paper. The dryer section of the conventional papermaking process is largely replaced with a felt fabric, later on canvas.

The fabrics used in the dryer section of a paper machine include both dry felts and dry fabrics. The dry carpet comprises a canvas and wool blended woven dry carpet, a needled dry carpet BOB dry carpet and a bottom net composite dry carpet BOM composite dry carpet; the drying net is a polyester spiral drying net, a polyester woven drying net and the like. BOB dry blankets currently have few users, and BOM composite dry blankets and polyester woven dry nets are commonly used. Although the common BOB dry blanket and the BOM composite dry blanket have the advantages of smooth and fine blanket surface and no net mark, the defects of overlarge density and thickness, heavy size deformation, low air permeability and the like still exist, so that paper web is not uniformly dried, the drying rate is low, water vapor is easily accumulated in the blanket, paper diseases such as 'seersucker', 'sweat stain' and the like are caused, and the steam consumption is large. Although the air permeability of the common polyester woven dry net is high, the dry net mark on the paper surface cannot be solved, and the problem cannot be thoroughly solved even if the polyester flat filament dry net is adopted.

The foreign 20 th century and 80 th era appeared with dry flocked blankets. The flocking dry net adopts a polyester spiral dry net or a polyester weaving dry net as a base net in an endless or seam type, and high-temperature resistant short fibers with certain fineness and quantity are implanted into the front side or the front side and the back side of the base net simultaneously, so that the flocking dry net is a composite high-performance product integrating the advantages of a needle-punched dry blanket and the polyester dry net. At present, a certain paper making felt manufacturer in China develops and produces a polyester spiral flocking dry net, but in the actual use process, although the advantages of high air permeability, no net mark and the like exist, the combination between fibers and between the fibers and a base net is not firm due to the structural limitation, so that the product is easy to lose hair and fall hair in use, the use range of the product is limited, and the service life of the product is shortened.

Chinese patent No. (CN 202595560U) discloses a flocking dry net for paper making, belonging to a drying fabric for the drying part of a paper machine. When the flocking dry net is used for making paper, the surface of the paper can be smooth, net marks on the paper are eliminated, the higher air permeability and the convenient installation effect of the polyester dry net are achieved, the pin ring interface provides a convenient installation condition, and the speed and the paper yield of a paper machine are improved. However, the flocking mode is not firm enough, the phenomena of hair removal and hair falling are easy to occur, and the service life of the flocking dry net is short.

Disclosure of Invention

In order to solve the problems, the invention provides a polyester flocking dry net for a drying part of a paper machine, which adopts a polyester spiral dry net as a basic net, and simultaneously implants high-temperature resistant short fibers and wool with certain fineness and quantity on the front and back surfaces of the polyester spiral dry net. The high-temperature-resistant short fiber built-in dry net layer has the advantages of high air permeability, no net mark and the like, and the high-temperature-resistant short fiber built-in dry net layer is not easy to fall off, so that the use effect is good, the equipment runs stably, and the service life is long.

The technical scheme of the invention is as follows: a polyester flocking dry net for a drying part of a paper machine is characterized by sequentially comprising a paper pasting surface fiber layer, a dry net layer and a bottom fiber layer from top to bottom, wherein the dry net layer comprises warp yarns and weft yarns, the weft yarns comprise supporting weft yarns and functional weft yarns, one functional weft yarn is arranged between every two adjacent supporting weft yarns, the warp yarns are spirally wound on the outer sides of the two adjacent supporting weft yarns, and the warp yarns are abutted against one side of the functional weft yarns when passing through the functional weft yarns; when the warp threads pass through the supporting weft threads and the functional weft threads twice, contact ends of the warp threads and the supporting weft threads and contact ends of the warp threads and the functional weft threads are located on different side surfaces; and the contact ends are positioned on different sides when the warp threads pass through the functional weft threads twice, so that the warp threads have a clamping effect on the functional weft threads.

Furthermore, the warp is made of high-temperature resistant polyester fiber with the diameter of 0.8-1.0 mm.

Further, the functional weft is high-temperature-resistant spun yarn.

Further, the function weft comprises a yarn core, an inner yarn layer and an outer yarn layer, wherein the inner yarn layer is wrapped on the outer side of the yarn core, and the outer yarn layer is wrapped on the outer side of the inner yarn layer.

Furthermore, the inner yarn layer comprises a plurality of first yarns, the adjacent two first yarns are mutually inconsistent, and the first yarns are arranged in parallel to form an annular sleeve.

Further, the outer yarn layer comprises second yarns and third yarns, and the second yarns and the third yarns are wound outside the inner yarn layer in a double spiral manner.

Further, the yarn core is Nomex flame-retardant fiber, and the first yarn, the second yarn and the third yarn are all high-wet-modulus viscose fibers.

The paper pasting surface fiber layer and the bottom layer fiber layer are respectively penetrated into the upper surface and the lower surface of the supporting weft and the functional weft through a needling process.

The paper surface fiber layer and the bottom layer fiber layer are respectively penetrated into the upper surface and the lower surface of the functional weft through a needling process.

Furthermore, the paper surface fiber layer and the bottom layer fiber layer are both a mixture of synthetic chemical fibers and wool.

The invention has the beneficial effects that:

1. the invention provides a polyester flocking dry net for a drying part of a paper machine, which is characterized in that fiber layers with different fineness and gram weight are penetrated into the surface of a polyester dry net layer by adopting a needling process, the fibers are made of synthetic chemical fibers such as nylon and terylene or a mixture of wool and synthetic chemical fibers, the mixing ratio is 10-50%, the mixing ratio, the fineness and the gram weight of the fibers can be changed according to the requirements of produced paper types, vehicle speed and air permeability and different use parts, and the laying of the fiber layers can effectively eliminate uneven 'net marks' generated by the direct contact of paper sheets and a dry net; the diameter, the number of layers and the organization structure of the polyester dry net can be determined according to the change of the air permeability required by different paper produced by different paper machine application parts, and the dry net layer can provide the proper air permeability in the paper sheet drying process, so that the effect of simultaneously improving the running speed of the paper machine and the appearance quality of the paper sheets is achieved. Solves the problems of overweight paper surface 'net mark' and too low dry blanket papermaking air permeability caused by polyester dry net papermaking.

2. The polyester flocking dry net for the drying part of the paper machine, provided by the invention, has the advantages that the yarn core is Nomex flame-retardant fiber, the thermal stability is good, and the strength can still keep 65% of the original strength after the polyester flocking dry net is continuously used for 100 hours at a high temperature of 260 ℃. The strength can be maintained 50% when the alloy is used for 7 days at a high temperature of 304 ℃. And the Nomex flame-retardant fiber has excellent chemical resistance, namely acid and alkali resistance, an oxidant, an organic solvent and the like. The radiation resistance is excellent, and the strong force is hardly lost under the irradiation of ultraviolet rays and Y rays with certain intensity.

3. The polyester flocking dry net for the drying part of the paper machine, provided by the invention, has the characteristics of high strength, low extensibility, high wet modulus, alkali resistance and the like, wherein the first yarns, the second yarns and the third yarns are all high-wet-modulus viscose fibers. The fastness, the washing resistance and the form stability of the fabric are all close to those of high-quality cotton. The polynosic fiber is one of high strength and high wet modulus viscose fiber, and has low water swelling degree and high elastic recovery rate, so that the size stability of the fabric is high. The strong viscose fiber has high strength and good repeated deformation resistance, and can be used as tire cord, transmission belt, V-belt, rope and various industrial fabrics, such as canvas, plastic coating fabric, and the like. Therefore, the yarn core is wrapped on the outer layer of the yarn core, so that the stability is high, the high-temperature resistance is excellent, the flame-retardant fibers can be effectively protected from being damaged, the spinnability of the flame-retardant fibers is improved, and on the other hand, the fibers with good spinnability form a double-spiral structure on the outer layer of the spun yarn, so that the flexibility of the yarn can be effectively improved, and the plasticity of the functional weft is ensured.

4. According to the polyester flocking dry net for the drying part of the paper machine, provided by the invention, the fiber layers are penetrated into the upper surface and the lower surface of the polyester dry net layer through the needling process, so that the advantages of high air permeability, no net mark and the like are achieved, the high-temperature resistant short fibers arranged in the dry net layer can be implanted into functional weft yarns according to actual needs, the fiber layers are not easy to fall off, the using effect is good, the equipment is stable in operation, and the polyester flocking dry net has the performances of acid resistance, alkali resistance, wear resistance and high temperature resistance, and the dry net has long service life.

Drawings

FIG. 1 is a schematic side view of a polyester flocking dryer fabric for the dryer section of a paper machine in accordance with an embodiment of the present invention;

FIG. 2 is a schematic illustration of the side structure of a dryer fabric of a polyester flocking dryer fabric used in the dryer section of a paper machine in an embodiment of the invention;

FIG. 3 is a schematic top view of a dryer fabric for a polyester flocking dryer fabric in a dryer section of a paper machine in accordance with an embodiment of the present invention;

FIG. 4 is a schematic side view of a functional weft of a polyester flocking dry wire used in the dryer section of a paper machine in accordance with an embodiment of the present invention;

figure 5 is a schematic top view of a functional weft of a polyester flocking dry wire used in the dryer section of a paper machine in accordance with an embodiment of the present invention.

In the figure: 1. pasting a paper surface fiber layer; 2. a dry mesh layer; 3. a bottom fiber layer; 21. warp threads; 22. a weft; 221. supporting the weft; 222. functional weft threads; 223. a yarn core; 224. an inner yarn layer; 225. an outer yarn layer; 226. a first yarn; 227. a second yarn; 228. a third yarn.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention and the technical solutions in the prior art, the following will describe the specific embodiments of the present invention with reference to the accompanying drawings.

It is obvious that the drawings in the following description are only some examples of the invention, and it is obvious to a person skilled in the art that other drawings and other embodiments can be obtained from these drawings without inventive effort, and the invention is not limited to this example.

The specific embodiment of the invention is as follows:

example 1

In the embodiment of the invention, the imported heavy wide rapier loom is adopted for weaving, so that high net surface smoothness, consistency and stability can be obtained. German Yugen company 12.9 m JR-1F type loom, the weft clamping force reaches 6.5 t/m; the Swedish TEXO 10.5 m TCX1115 loom has a weft clamping force of 8 t/m.

A polyester flocking dry net used in a drying part of a paper machine, please refer to fig. 1, which is characterized by comprising a paper pasting surface fiber layer 1, a dry net layer 2 and a bottom layer fiber layer 3 from top to bottom. Specifically, paper to be dried is pasted on the upper surface of the paper pasting surface fiber layer 1, the paper pasting surface fiber layer 1 and the bottom layer fiber layer 3 can effectively ensure the smoothness of the paper during drying, and net marks caused by a dry net layer are eliminated.

In the embodiment of the present invention, referring to fig. 2, the dry mesh layer 2 includes warp yarns 21 and weft yarns 22. Specifically, the dry net layer 2 is composed of a weft 22 vertically arranged and a warp 21 wound around the weft 22. Referring to fig. 3, the weft 22 includes a supporting weft 221 and a functional weft 222. Specifically, the supporting wefts 221 serve as base lines, every two adjacent supporting wefts 221 serve as a group of base lines, one functional weft 222 is arranged between every two adjacent supporting wefts 221, the warp 21 is spirally wound on the outer sides of the two adjacent supporting wefts 221, and the warp 21 passes through the functional weft 222 between the two supporting wefts 221 and interferes with the functional weft 222. Specifically, when the warp 21 is wound from one supporting weft 221 to another supporting weft 221, the warp passes through the supporting weft 221 and the functional weft 222 respectively in front and at back, and at this time, the contact end of the warp 21 and the supporting weft 221 and the contact end of the warp 21 and the functional weft 222 are located on different sides; and the contact ends are located on different sides when the warp 21 passes through the functional weft 222 twice in the front and back, so that the warp 21 on both sides of the functional weft 222 can clamp the functional weft 222. Thereby fixing the functional weft 222 between two adjacent support wefts 221.

Further, the warp 21 is made of high temperature resistant polyester fiber with the diameter of 0.8-1.0 mm. The warp yarns 21 are spirally wound on the outer sides of the supporting wefts 221 to form a polyester spiral drying net, the polyester spiral drying net is unique and advanced in weaving process, high in air permeability, good in drying efficiency, high in strength, convenient to disassemble, connect, repair and replace, long in service life, and completely integrated with other parts, and a net interface is not different from other parts.

The traditional polyester spiral flocking dry net is in the actual use processAlthough the product has the advantages of high air permeability, no net mark and the like, the combination between fibers and between the fibers and the base net is not firm due to the structural limitation, so that the product is easy to have the phenomena of hair removal and hair falling in use. Therefore, in the embodiment of the present invention, the functional weft 222 is a high temperature resistant yarn. Further, the paper surface fiber layer 1 and the bottom fiber layer 3 are respectively penetrated into the upper surface and the lower surface of the supporting weft 221 and the functional weft 222 by a needle punching process. One side of contact paper is just promptly paste paper face fibrous layer 1, paste paper face fibrous layer 1 and implant the matte and slightly thick, the one side that the another side does not contact the paper promptly bottom fibrous layer 3, bottom fibrous layer 3 flocking volume is less relatively, in order to increase paste paper face fibrous layer 1's cohesion and improvement wearability are the purpose. According to the different positions of the flocking dry net, the air permeability is required to be different, and the flocking amount is changed along with the air permeability, generally 150-400 g.m^-2. In the embodiment of the invention, the spreading amount of the paper-faced fiber layer 1 is 240 g.m^-2The bottom fiber layer 3 has a gross laying amount of 120 g.m^-2。

In order to further enhance the stability of flocking, in the embodiment of the present invention, referring to fig. 4 and 5, the functional weft 222 includes a yarn core 223, an inner yarn layer 224 and an outer yarn layer 225, the inner yarn layer 224 is wrapped outside the yarn core 223, and the outer yarn layer 225 is wrapped outside the inner yarn layer 224. Further, the inner yarn layer 224 includes a plurality of first yarns 226, two adjacent first yarns 226 are in contact with each other, and the plurality of first yarns 226 are arranged side by side to form an annular sleeve. Further, the outer yarn layer 224 includes second yarns 227 and third yarns 228, and the second yarns 227 and the third yarns 228 are wound outside the inner yarn layer 224 in a double spiral shape.

The yarn core 223 is Nomex flame-retardant fiber which has good thermal stability, and the strength of the yarn core can still keep 65% of the original strength after the yarn core is continuously used for 100 hours at the high temperature of 260 ℃. The strength can be maintained 50% when the alloy is used for 7 days at a high temperature of 304 ℃. And the Nomex flame-retardant fiber has excellent chemical resistance, namely acid and alkali resistance, an oxidant, an organic solvent and the like. The radiation resistance is excellent, and the strong force is hardly lost under the irradiation of ultraviolet rays and Y rays with certain intensity. So that the yarn core 223 can improve the strength and aging resistance of the functional weft 222. The service life of the functional weft 222 is extended.

The first yarn 226, the second yarn 227, and the third yarn 228 are all high wet modulus viscose fibers. By the arrangement, the first yarn 226, the second yarn 227 and the third yarn 228 are viscose fibers with high wet modulus and have the characteristics of high strength, low extensibility, high wet modulus, alkali resistance and the like, the first yarn 226 forms a sleeve side by side, the yarn core 223 is wrapped at the inner side, the stability is high, the high-temperature resistance is excellent, the flame-retardant fibers can be effectively protected from being damaged, the spinnability of the flame-retardant fibers is improved, further, the second yarn 227 and the third yarn 228 with good spinnability form a double-spiral structure on the outer layer of the spun yarn, the first yarn 226 is wrapped in the double-spiral structure, the flexibility of the yarn can be effectively improved, the plasticity of the functional weft is ensured, meanwhile, the stability of the wool layer implanted by a needling process can be maximally improved, the multilayer spiral on the outer side can be greatly convenient for needling, and the phenomenon that hair is easy to fall off in use can be effectively avoided, the stability of equipment operation has been guaranteed, the life of equipment has effectively been prolonged.

Further, the paper surface fiber layer 1 and the bottom fiber layer 3 are both a mixture of synthetic chemical fibers and wool. Wherein the mass ratio of the synthetic chemical fibers to the wool is 1-5: 10.

Example 2

In the embodiment of the invention, on the basis of the embodiment 1, the paper-surface fiber layer 1 and the bottom fiber layer 3 are respectively penetrated into the upper surface and the lower surface of the functional weft 222 by a needle punching process. Due to the arrangement, no wool layer is implanted into the supporting weft 221, so that the paper-pasting surface fiber layer 1 and the bottom layer fiber layer 3 become thinner, the air permeability, the drying efficiency and the strength of the polyester spiral drying net can be improved, and meanwhile, the wool layer is not implanted into the supporting weft 221, so that the wool layer is not easy to fall off, and the stability of wool layer implantation is further enhanced. The embodiment of the invention is suitable for the situation that higher drying efficiency is needed. The paper sheet can be dried quickly.

The above-described aspects may be implemented individually or in various combinations, and such variations are within the scope of the present invention.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the specific embodiments of the invention be limited to these descriptions. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.