CN217203359U - Papermaking forming wire for high-speed paper machine and papermaking equipment - Google Patents

Abstract

The utility model provides a papermaking forming net for a high-speed paper machine and papermaking equipment, wherein the papermaking forming net for the high-speed paper machine comprises a surface layer, a connecting layer and a bottom layer, the surface layer is formed by interlacing weaving surface layer weft threads and surface layer warp threads, the bottom layer is formed by interlacing weaving bottom layer weft threads and bottom layer warp threads, and the connecting layer is arranged between the surface layer and the bottom layer; wherein, the number ratio of the surface layer warp to the bottom layer warp is not less than 3:2, and the number ratio of the surface layer weft to the bottom layer weft is not more than 1: 1. The embodiment that this application provided can reduce the thickness of papermaking forming wire, improve the dewatering performance of papermaking forming wire when improving the paper quality of papermaking forming wire.

Description

Papermaking forming wire for high-speed paper machine and papermaking equipment

Technical Field

The application relates to the field of papermaking, in particular to a papermaking forming wire for a high-speed paper machine and papermaking equipment.

Background

Papermaking forming wires are important forming and dewatering materials in the wet end of a paper machine, and the commonly used papermaking forming wires comprise a single-layer forming wire, a double-layer forming wire, a two-layer semi-forming wire and a three-layer forming wire, wherein the three-layer forming wire is a papermaking forming wire commonly used in the high-speed paper machine at present.

With the continuous increase of the speed of a paper machine and the continuous decrease of the basis weight (gram weight) of packaging paper, the market puts higher requirements on the paper quality, the dewatering performance and the service life of a papermaking forming wire.

The inventor of the application discovers that the existing papermaking forming wire for the high-speed paper machine has the defects of large thickness, more water throwing and slow dehydration in the long-term research process, and can not meet the requirements of packaging paper with high speed and low gram weight.

SUMMERY OF THE UTILITY MODEL

The technical problem that this application mainly solved provides a papermaking forming wire and papermaking equipment for high-speed paper machine, can reduce the thickness of papermaking forming wire, improve the dewatering performance of papermaking forming wire when improving the paper quality of papermaking forming wire.

In order to solve the technical problem, the application adopts a technical scheme that: the papermaking forming net for the high-speed paper machine comprises a surface layer, a connecting layer and a bottom layer, wherein the surface layer is formed by interweaving surface layer wefts and surface layer warps, the bottom layer is formed by interweaving bottom layer wefts and bottom layer warps, and the connecting layer is arranged between the surface layer and the bottom layer; wherein, the number ratio of the surface layer warp to the bottom layer warp is not less than 3:2, and the number ratio of the surface layer weft to the bottom layer weft is not more than 1: 1.

In order to solve the above technical problem, another technical solution adopted by the present application is: there is provided a papermaking apparatus comprising the papermaking forming wire for a high-speed paper machine in the above embodiment.

The utility model has the beneficial effects that the quantity ratio of surface layer warp to bottom layer warp of the papermaking forming net for the high-speed paper machine is not less than 3:2, and the quantity ratio of surface layer weft to bottom layer weft is not more than 1:1, so that the papermaking quality of the papermaking forming net is improved, the thickness is reduced, the dehydration speed is improved, the water content is reduced, and the service life is prolonged.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained without creative efforts.

FIG. 1 is a schematic illustration of a high speed paper machine papermaker's forming fabric according to one embodiment of the present application;

FIG. 2 is a schematic diagram of the construction of a papermaking apparatus in one embodiment of the present application;

FIG. 3 is a schematic representation of the weave pattern of the smallest weave elements of a high speed paper machine forming wire in an embodiment of the present application;

FIG. 4 is a schematic structural view of the step-by-step weaving of the 1 st to 10 th weft threads of the smallest weave unit of the papermaker's forming wire for the high-speed paper machine in the embodiment of FIG. 3;

FIG. 5 is a schematic structural view of a step-by-step weaving of the 11 th to 20 th weft threads of the minimum structure unit of the papermaker's forming wire for a high-speed paper machine in the embodiment of FIG. 3;

FIG. 6 is a schematic structural view showing a step-by-step weaving of 21 st to 30 th weft threads of the minimum structure unit of the papermaker's fabric for a high-speed paper machine in the embodiment of FIG. 3;

fig. 7 is a schematic structural view of the stepwise knitting of 31 st to 40 th weft threads of the minimum structure unit of the papermakmg forming wire for a high-speed paper machine in the embodiment of fig. 3.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be noted that the following examples are only for illustrating the present invention, but do not limit the scope of the present invention. Similarly, the following embodiments are only some but not all embodiments of the present invention, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

It should be noted that the terms "comprises" and "comprising," and any variations thereof, in the embodiments of the present application, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Referring to fig. 1, fig. 1 is a schematic structural view of a papermaking forming wire for a high-speed paper machine according to an embodiment of the present application. The papermaking forming net for the high-speed paper machine comprises a surface layer 10, a connecting layer 12 and a bottom layer 14.

Alternatively, the surface layer 10 is formed by interlacing the surface layer weft threads 100 and the surface layer warp threads 102, and the bottom layer 14 is formed by interlacing the bottom layer weft threads 140 and the bottom layer warp threads 142, wherein the number ratio of the surface layer warp threads 102 to the bottom layer warp threads 142 is not less than 3:2, and the number ratio of the surface layer weft threads 100 to the bottom layer weft threads 140 is not more than 1: 1. For example, in an embodiment of the present application, the number ratio of the surface layer warp threads 102 to the bottom layer warp threads 142 is 3:2, the number ratio of the surface layer weft threads 100 to the bottom layer weft threads 140 is 1:1, which corresponds to the number ratio of the surface layer warp threads 102 to the bottom layer warp threads 142 being 1.5, and the number ratio of the surface layer weft threads 100 to the bottom layer weft threads 140 being 1. In other embodiments of the present application, the ratio of the number of the surface layer warp threads 102 to the number of the bottom layer warp threads 142 may be 1.6, 1.7, 1.8, 1.9, 2.0, etc., and the ratio of the number of the surface layer weft threads 100 to the number of the bottom layer weft threads 140 may be 0.9, 0.8, 0.7, 0.6, etc. In the above embodiment, the high-speed paper machine forming fabric for a paper machine has a high fiber support index of the surface layer 10, a high fiber retention rate and a good paper quality of the paper sheet, wherein the number ratio of the surface layer warp threads 102 to the bottom layer warp threads 142 is 3: 2; the papermaking forming net for the high-speed paper machine, which has the number ratio of the surface layer wefts 100 to the bottom layer wefts 140 of 1:1, is small in thickness, fast in dehydration, low in water content in the net and free of water splashing, so that the requirements of high-speed low-gram-weight packaging paper can be met; where grammage is generally used to indicate the degree of thickness of the paper, e.g., the weight per square meter of a sheet of paper, the greater the grammage, the thicker the sheet. According to the embodiment of the application, the diameter of the surface layer warp threads 102 can be reduced, and the number of the surface layer warp threads 102 can be increased, so that the retention rate of fibers and fillers can be improved better, and the paper sheet can be formed uniformly; meanwhile, the diameter of the bottom layer wefts 140 can be increased, the number of the bottom layer wefts 140 is increased, the wear resistance of the forming net is improved, and the service life of the forming net is prolonged. For ease of description, a high speed paper machine forming wire is hereinafter or referred to as a forming wire.

Alternatively, the face layer 10 may be formed by weaving through a flat weaving process so as to increase the fiber support index of the forming wire, thereby better increasing the retention of fibers and fillers and ensuring uniform sheet formation to meet the requirements of high-speed low-gram-weight packaging paper on the quality of the finished paper. For example, the surface layer 10 can be formed by weaving in an 1/1 plain weave method, and the warps and wefts in the plain weave are interwoven in an upper-lower rule, i.e. every other warp and weft is interlaced, the number of interwoven points is large, and the buckling points of the warps and wefts are the largest, so that the surface layer 10 is high in fiber support index, uniform and smooth in meshes, the retention rate of fibers and fillers of finished paper is improved, the paper is ensured to be formed uniformly, the paper is stripped from a forming net conveniently, and the surface of the formed paper is smooth.

Optionally, the connecting layer 12 includes a pair of first connecting weft threads 120 and second connecting weft threads 122, the first connecting weft threads 120 are interwoven with the face layer warp threads 102, and the second connecting weft threads 122 are interwoven with the bottom layer warp threads 142 for connecting the face layer 10 and the bottom layer 14; wherein the number of weft threads of the connecting layer 12 is 2/5 of the total number of weft threads of the forming wire. In the field of papermaking technology, the two connecting wefts arranged in pairs of the connecting layer 12 of the forming wire correspond to the wefts of one face layer 10, and therefore, in the above-mentioned ratio of the number of face layer wefts 100 to the number of bottom layer wefts 140, the number of face layer wefts 100 includes the number of connecting wefts of the connecting layer 12; for example, the above-mentioned ratio of the number of surface layer wefts 100 to bottom layer wefts 140 of 1:1 means that the ratio of the sum of the number of surface layer wefts 100 to the number of wefts contributed by the connecting layer 12 to the number of bottom layer wefts 140 is 1:1, and when the number of wefts of the connecting layer 12 is 2/5 of the total number of wefts of the forming wire, the ratio of the number of wefts of the surface layer 10, the number of wefts of the connecting layer 12 and the number of wefts of the bottom layer 14 is 1:2: 2. In the embodiment of the application, the warps and wefts of the surface layer 10 and the bottom layer 14 are respectively interwoven to form independent mesh layers; the surface layer 10 and the bottom layer 14 are sewn together through the first connecting weft 120 and the second connecting weft 122 in the middle, the connecting layer 12 limits the relative movement of the surface layer 10 and the bottom layer 14, the abrasion degree of the connecting layer is relieved, the service life is prolonged, and meanwhile the connecting weft of the connecting layer 12 plays a role in supporting fibers on the surface layer 10, so that the upper layer and the lower layer of the forming net are combined more tightly, the structural stability of the forming net is improved, and the thickness of the forming net is reduced.

Alternatively, the bottom layer 14 may be formed by weaving in any one of an 8-harness satin weaving method and a 10-harness satin weaving method. Taking an 8-harness satin weaving method as an example, each bottom layer weft 140 crosses over every 1 and every 7 bottom layer warps 142, or each bottom layer weft 140 crosses over every 2 and every 6 bottom layer warps 142, or each bottom layer weft 140 crosses over every 3 and every 5 bottom layer warps 142, or each bottom layer weft 140 crosses over every 4 and every 4 bottom layer warps 142. By the weaving mode, the vertical stiffness, the horizontal stiffness and the oblique stiffness of the forming net can be increased, the horizontal running of the forming net can be ensured by the increase of the horizontal stiffness, the quantitative change of the width of paper sheets is controlled, the forming net is not easy to deviate when running at a high speed can be ensured by the increase of the vertical stiffness, and the quick and accurate reaction when a guide roller or a correcting roller adjusts the running direction of the forming net can be ensured by the increase of the oblique stiffness. In addition, the bottom layer 14 adopts a wear-resistant 8-harness satin weave, which can increase the span of the bottom layer wefts 140, increase the diameter of the bottom layer wefts 140, improve the wear resistance of the forming net, and further prolong the service life of the forming net.

In the embodiment of the present application, the surface layer weft 100 may be polyester monofilament with a diameter of 0.13-0.16mm, such as 0.13mm, 0.14mm, 0.15mm, 0.16mm, etc.; the face layer warp 102 may be a polyester monofilament with a diameter of 0.12-0.15mm, such as 0.12mm, 0.13mm, 0.14mm, 0.15mm, etc.; the first connecting weft thread 120 and the second connecting weft thread 122 can be polyester monofilament, nylon monofilament or polyester monofilament and nylon monofilament used alternately with a diameter of 0.13-0.16mm, such as 0.13mm, 0.14mm, 0.15mm, 0.16mm, etc.; the bottom weft yarns 140 may be polyester monofilament, nylon monofilament, or alternating polyester monofilament and nylon monofilament with a diameter of 0.44-0.51mm, such as 0.44mm, 0.45mm, 0.46mm, 0.47mm, 0.48mm, 0.49mm, 0.50mm, 0.51mm, etc.; the bottom warp 142 may be a polyester monofilament having a diameter of 0.26-0.30mm, such as 0.26mm, 0.27mm, 0.28mm, 0.29mm, 0.30mm, and the like. When the material adopted by the bottom weft 140 comprises nylon monofilament, the wear resistance of the bottom layer 14 can be improved; when the first connecting weft yarns 120 and the second connecting weft yarns 122 are made of nylon monofilament, they function as a connecting layer between the surface layer 10 and the bottom layer 14, and further increase the wear resistance of the bottom layer 14.

In the above embodiments, the warp density of the forming wire may alternatively be 50-54, such as 50, 51, 52, 53, 54, etc., and the weft density of the forming wire may be 43-49, such as 43, 44, 45, 46, 47, 48, 49, etc., per cm. Wherein, the warp density of the surface layer 10 can be 30-33 pieces/cm, such as 30 pieces/cm, 31 pieces/cm, 32 pieces/cm, 33 pieces/cm and the like; the weft density of the surface layer 10 can be 8-10 pieces/cm, such as 8 pieces/cm, 9 pieces/cm, 10 pieces/cm, etc.; the binding weft density of the binding layer 12 may be 17-20 threads/cm, e.g., 17 threads/cm, 18 threads/cm, 19 threads/cm, 20 threads/cm, etc.; the warp density of the bottom layer 14 can be 20-22, e.g., 20, 21, 22, etc.; the density of the weft yarns in the bottom layer 14 may be 17-20 yarns/cm, such as 17 yarns/cm, 18 yarns/cm, 19 yarns/cm, 20 yarns/cm, and the like.

Referring to fig. 2, fig. 2 is a schematic structural diagram of a papermaking apparatus according to an embodiment of the present application. The papermaking apparatus includes the above-described papermaking forming wire 20 for a high-speed paper machine. In a papermaking plant, a forming wire 20 runs over the rolls and the dewatering plates, wherein the surface layer 10 is the paper-forming layer of the forming wire 20 for trapping the fibers as paper; the bottom layer 14 is a support layer for the forming wire 20 and is abutted against a machine such as a press roll of a papermaking apparatus to support the forming wire 20.

In the embodiment of the present application, the material of the forming net can be polyester, nylon or a mixture of polyester and nylon, and compared with a metal forming net such as a copper net, the forming net provided by the embodiment has the following advantages: the density is small, the paper machine load is small, and the production efficiency is high; the material is soft, easy to operate and not easy to be damaged; the copper mesh is corrosion-resistant and wear-resistant, and the service life of the copper mesh is generally 3-5 times longer than that of a copper mesh and even longer; the paper quality can be improved, the net mark and the difference between two surfaces are reduced, the smoothness is improved, the loss of fibers and fillers is reduced, and the net changing times and various losses caused by net changing can be reduced; the weaving method of the forming net is more flexible and various, different weaving methods can be adopted, and the layer number of the forming net can be changed, so that different paper machines, different paper types and different papermaking conditions can be met, and the operation efficiency of papermaking equipment can be improved. For example, polyester monofilaments with a finer wire diameter can be used for both the warp and weft of the face layer 10, resulting in a higher paper quality forming web; the bottom layer wefts 140 can be made of polyester monofilaments with thicker wire diameters, and nylon in a certain proportion is matched to replace the polyester monofilaments, so that the service life of the forming net is prolonged; in addition, the bottom layer 14 of the forming net can be matched with a certain amount of nylon net, so that the wear resistance of the forming net is improved.

Alternatively, cover 10 may be formed from polyester monofilament knitted in an 1/1 flat knit weave to improve the paper quality of the forming wire; the connecting layer 12 can be made of monofilaments with the shrinkage rate of more than 20%, such as nylon monofilaments or other monofilaments with the shrinkage rates of 20%, 21%, 22%, 23%, 24%, 25% and the like, and the surface layer 10 and the bottom layer 14 are connected to support the surface layer 10, so that the finished paper is smooth and flat, and the wear resistance of the bottom layer 14 is improved; the bottom layer 14 can be formed by weaving polyester monofilaments and nylon monofilaments which are distributed in a staggered mode as bottom layer wefts 140 and polyester monofilaments as bottom layer warps 142 in an 8-harness satin weaving method, so that the running stability of the paper machine is improved, and meanwhile, the service life of the paper machine is prolonged.

Alternatively, the forming wire comprises three layers of different weave structures interwoven with polyester and/or nylon monofilaments by 20 harness frames, the smallest weave unit of the forming wire consisting of 20 warp threads and 40 weft threads. Referring to fig. 3, fig. 3 is a schematic diagram showing weaving patterns of the minimum weave units of the high-speed paper machine forming wire according to an embodiment of the present invention, where every 5 weaving patterns from top to bottom are one cycle, the 1 st weft is a surface layer weft 300, the 2 nd weft is a bottom layer weft 302, the 3 rd weft is a connecting weft 304, the 4 th weft is a bottom layer weft 306, and the 5 th weft is a connecting weft 308. In the above-described every 5 cycles, the number ratio of the surface layer wefts, the connecting layer wefts and the bottom layer wefts is 1:2:2, and every two connecting wefts correspond to one surface layer weft, so that the number ratio of the surface layer wefts to the bottom layer wefts is 1: 1.

Referring to fig. 4 to 7 in combination, fig. 4, 5, 6 and 7 are schematic structural diagrams of step-by-step weaving of the 1 st to 10 th weft threads, the 11 th to 20 th weft threads, the 21 st to 30 th weft threads and the 31 th to 40 th weft threads, respectively, of the minimum weave unit of the high-speed paper machine papermaking forming wire in the embodiment of fig. 3. In this embodiment, the number of the surface layer warps 400 is 12, the number of the bottom layer warps 402 is 8, and the surface layer wefts, the bottom layer wefts and the connecting wefts are alternately arranged, so that a total of 40 wefts exist in one weave cycle. Wherein, the wefts 1, 6, 11, 16, 21, 16, 31 and 36 are surface layer wefts and adopt an 1/1 flat knitting method; the wefts 2, 4, 7, 9, 12, 14, 17, 19, 22, 24, 27, 29, 32, 34, 37 and 39 are bottom wefts and are woven by an 8-harness weaving method; the other wefts are connecting wefts.

In the embodiment 1 of the application, the surface layer warp of the forming net is polyester monofilament with the diameter of 0.13mm, the surface layer weft is polyester monofilament with the diameter of 0.15mm, and the surface layer adopts 1/1 plain weaving method; the bottom layer warp adopts polyester monofilament with the diameter of 0.28mm, the bottom layer weft adopts one polyester monofilament and one nylon monofilament which are alternately used, the diameter of the bottom layer weft is 0.45mm, and the bottom layer adopts a high-wear-resistance 8-harness satin weaving method; the first connecting weft and the second connecting weft of the connecting layer adopt nylon monofilaments with the diameter of 0.15mm, the connecting surface layer and the bottom layer are connected, the warp of the connecting surface layer is interwoven with the warp of the surface layer to support paper, finished paper is guaranteed to be flat and smooth, the warp of the connecting surface layer is interwoven with the warp of the bottom layer to play a role in sewing the surface layer and the bottom layer, and meanwhile, the wear resistance of the bottom layer is improved. The papermaking forming wire for the high-speed paper machine obtained in the embodiment is tested by using the method in GB/T24290-2009 "measuring method for papermaking forming wire and drying wire", wherein the warp density is 52/cm (wherein the surface layer warp is 31.2/cm, the bottom layer warp is 20.8/cm), the weft density is 48.6/cm (wherein the surface layer weft is 9.8/cm, the bottom layer weft is 19.4/cm, and the connecting line is 19.4/cm), and other performance tests are as shown in table 1 below.

In the embodiment 2 of the application, the surface layer warp of the forming net is polyester monofilament with the diameter of 0.13mm, the surface layer weft is polyester monofilament with the diameter of 0.15mm, and the surface layer adopts 1/1 plain weaving method; the bottom layer warp adopts polyester monofilament with the diameter of 0.28mm, the bottom layer weft adopts one polyester monofilament and one nylon monofilament which are alternately used, the diameter of the bottom layer weft is 0.50mm, and the bottom layer adopts a high-wear-resistance 8-harness satin weaving method; the first connecting weft and the second connecting weft of the connecting layer adopt nylon monofilaments with the diameter of 0.15mm, the connecting surface layer and the bottom layer are connected, the warp of the connecting surface layer is interwoven with the warp of the surface layer to support paper, finished paper is guaranteed to be flat and smooth, the warp of the connecting surface layer is interwoven with the warp of the bottom layer to play a role in sewing the surface layer and the bottom layer, and meanwhile, the wear resistance of the bottom layer is improved. The papermaking forming wire for the high-speed paper machine obtained in the embodiment is tested by adopting the method in GB/T24290-2009 measuring method for papermaking forming wire and drying wire, wherein the warp density is 52/cm (wherein the surface layer warp is 31.2/cm, the bottom layer warp is 20.8/cm), the weft density is 43.2/cm (wherein the surface layer weft is 8.6/cm, the bottom layer weft is 17.3/cm, and the connecting line is 17.3/cm), and other performance tests are shown in the following table 1.

Table 1: detection result of performance of papermaking forming wire for high-speed paper machine

Performance of	Example 1	Example 2
			Thickness of forming net (mm)	1.15	1.20
Fiber Support Index (FSI)	135	126
			Support Point (SP)	755	674
Index of Dehydration (DI)	33.3	30.6
			Tensile Strength (N/cm)	1250	1280
Permeability (CFM)	451	465

As can be seen from the data in table 1, the forming wire for high-speed paper machine provided in the embodiment of the present application has a high fiber support index and a large number of support points, which indicates that the forming wire in the embodiment has a high retention rate for the fibers and fillers of paper, the surface mesh mark of the formed paper is greatly reduced, and the forming quality of the paper sheet is better; higher dehydration index, larger air permeability and smaller thickness, which shows that the drainability is greatly enhanced and the dehydration capability is greatly improved. Meanwhile, the strength is higher, the wear resistance is good, and the service life is long.

In summary, the number ratio of the surface layer warp threads to the bottom layer warp threads of the papermaking forming mesh for the high-speed paper machine provided by the embodiment of the application is not less than 3:2, so that the surface layer fiber support index is high, the paper forming quality is good, meanwhile, the diameter of the surface layer warp threads is reduced and the number of the surface layer warp threads is increased by adjusting the structural design, so that the retention rate of fibers and fillers is better improved, the paper sheet is ensured to be formed uniformly, and the requirements of high-speed low-gram-weight packaging paper on the paper forming quality are met; the forming net adopts an SSB structure to connect the upper layer and the lower layer, the surface layer and the bottom layer are connected through the paired connecting wefts, and a material with the shrinkage rate not less than 20% is selected as the connecting wefts to ensure that the upper layer and the lower layer of the forming net are firmly and tightly combined; the number ratio of the surface layer to the bottom layer of the forming net is not more than 1:1, so that the forming net is small in thickness, fast in dehydration and small in water content in the net, the requirement of high-speed low-gram-weight packaging paper on dehydration capacity is met, meanwhile, the bottom layer adopts a wear-resistant 8-harness satin weaving method, the span of the bottom layer weft is increased, the diameter of the bottom layer weft is increased, the wear resistance of the forming net is improved, the service life of the forming net is prolonged, and the requirement of high-speed low-gram-weight packaging paper on the service life is met.

The above only is the partial embodiment of the utility model discloses a not therefore restriction the utility model discloses a protection scope, all utilize the utility model discloses equivalent device or equivalent flow transform that the content of description and drawing was done, or direct or indirect application in other relevant technical field, all the same reason is included in the patent protection scope of the utility model.

Claims (10)

1. A papermaking forming net for a high-speed paper machine comprises a surface layer, a connecting layer and a bottom layer, and is characterized in that the surface layer is formed by interweaving surface layer wefts and surface layer warps, the bottom layer is formed by interweaving bottom layer wefts and bottom layer warps, and the connecting layer is arranged between the surface layer and the bottom layer; the number ratio of the surface layer warps to the bottom layer warps is not less than 3:2, and the number ratio of the surface layer wefts to the bottom layer wefts is not more than 1: 1.

2. The high-speed paper machine forming wire of claim 1, wherein the face layer is woven by 1/1 plain weave.

3. The papermaker's fabric according to claim 1, wherein the base layer is formed by weaving by any one of 8 harness satin weaving and 10 harness satin weaving.

4. The paper making forming wire for high-speed paper machines according to claim 1, characterized in that the connecting layer comprises paired first connecting weft yarns and second connecting weft yarns, the first connecting weft yarns are interwoven with the surface layer warp yarns, and the second connecting weft yarns are interwoven with the bottom layer warp yarns; wherein the number of the wefts of the connecting layer is 2/5 of the total number of the wefts of the papermaking forming net for the high-speed paper machine.

5. The papermaker's forming fabric according to claim 4, wherein the shrinkage of the weft of the connecting layer is not less than 20%.

6. The high-speed paper machine clothing according to claim 1, comprising a plurality of minimum weave units consisting of 20 warp threads and 40 weft threads.

7. The papermaking forming wire for the high-speed paper machine according to claim 6, characterized in that the papermaking forming wire for the high-speed paper machine is formed by interweaving polyester monofilaments and/or nylon monofilaments by 20 heald frames; the surface layer warps, the surface layer wefts and the bottom layer warps are polyester monofilaments, and the bottom layer wefts are polyester monofilaments, nylon monofilaments or alternatively used polyester monofilaments and nylon monofilaments.

8. The papermaker's forming fabric according to claim 7, wherein the diameter of the face layer warp is 0.12-0.15 mm; the diameter of the surface layer weft is 0.13-0.16 mm;

the diameter of the bottom layer warp is 0.26-0.30 mm; the diameter of the bottom layer weft is 0.44-0.51 mm;

the diameter of the connecting layer connecting weft is 0.13-0.16 mm;

the warp density of the papermaking forming net for the high-speed paper machine is 50-54 pieces/cm; the density of the weft of the papermaking forming net for the high-speed paper machine is 43-49 pieces/cm.

9. The papermaking forming wire for the high-speed paper machine according to claim 8, characterized in that the warp density of the surface layer is 30-33 threads/cm; the density of the weft threads of the surface layer is 8-10 threads/cm;

the density of the warp threads of the bottom layer is 20-22 threads/cm; the density of the weft of the bottom layer is 17-20 pieces/cm;

the density of the connecting wefts of the connecting layer is 17-20 pieces/cm.

10. An apparatus for manufacturing paper, characterized by comprising a papermaking forming wire for a high-speed paper machine according to any one of claims 1 to 9.

Images