CN112064395A

CN112064395A - Novel warp sewing household paper three-layer forming net and papermaking equipment

Info

Publication number: CN112064395A
Application number: CN202010852241.4A
Authority: CN
Inventors: 叶平; 陆平; 周积学; 盛长新; 孙勇
Original assignee: Jiangsu Jinni Pmc Co ltd
Current assignee: Jiangsu Jinni Pmc Co ltd
Priority date: 2020-08-21
Filing date: 2020-08-21
Publication date: 2020-12-11

Abstract

The novel warp-stitched household paper three-layer forming net comprises a paper forming layer, a middle connecting layer and a machine layer, wherein the middle connecting layer comprises paired first stitched warps and second stitched warps, the first stitched warps are interwoven with wefts of the paper forming layer, and the second stitched warps are interwoven with wefts of the machine layer to form the paper layer and the machine layer; the forming net is formed by interweaving polyester monofilaments or nylon monofilaments by 16 heald frames and comprises a plurality of minimum tissue units, wherein the minimum tissue units are formed by interweaving warp yarns consisting of 16 polyester monofilaments and weft yarns consisting of 24 polyester monofilaments or nylon monofilaments. In this way, this application can utilize paired warp of sewing up to make machine layer and ready-made paper layer connect for it is inseparabler firm that the upper and lower layer combines, eliminates inside wearing and tearing and layering phenomenon.

Description

Novel warp sewing household paper three-layer forming net and papermaking equipment

Technical Field

The application relates to the technical field of papermaking, in particular to a novel warp sewing household paper three-layer forming net and papermaking equipment.

Background

Papermaker's forming fabrics are important sheet forming, dewatering and conveying equipment in the wet end of a paper machine, affecting the quality and quality of the paper. At present, the speed of a paper machine for household paper is faster and faster, and a forming net is required to remove a large amount of water in a short time; meanwhile, the quality requirement on paper of the household paper is higher and higher, the fiber support index of the surface layer is required to be high, and the surface layer is fine and smooth; in addition, new requirements on softness and comfort of the household paper are also provided.

The existing papermaking forming net applied to a paper machine for domestic paper is completely formed by sewing wefts, the forming net sewn by the wefts has an internal abrasion phenomenon in the middle and later use periods, the interlayer bonding force of a paper forming layer and a machine layer is poor, the layering phenomenon is easy to generate, and the paper forming quality is influenced; and the forming net sewed by the weft has poor stability, the fiber support index of a paper forming layer is not high, the density is low, the fiber retention rate of the household paper is low, the diameter change of the warp threads of the paper forming layer and a machine layer is large, the dehydration is slow, the service life is short, and the existing forming net sewed by the weft is not suitable for the requirements of a paper machine of the household paper with high speed.

Disclosure of Invention

The main technical problem who solves of this application provides a novel warp sews up domestic paper three-layer forming wire and papermaking equipment, can utilize the paired warp of sewing up to make machine layer and ready-made paper layer connect.

In order to solve the above technical problem, one scheme adopted by the present application is: the utility model provides a novel warp sews up domestic paper three-layer forming net, includes: a paper-forming layer, an intermediate connecting layer and a machine layer, wherein the intermediate connecting layer comprises paired first and second stitching warp threads, the first stitching warp threads being interwoven with weft threads of the paper-forming layer, the second stitching warp threads being interwoven with weft threads of the machine layer to connect the paper-forming layer and the machine layer; the forming net is formed by interweaving polyester monofilaments or nylon monofilaments through 16 heald frames and comprises a plurality of minimum tissue units, wherein the minimum tissue units are formed by interweaving warps formed by 16 polyester monofilaments and wefts formed by 24 polyester monofilaments or nylon monofilaments.

The paper-forming layer is formed by weaving warps of the paper-forming layer and wefts of the paper-forming layer through a 4-harness satin weaving method; the machine layer is formed by weaving the warp yarns of the machine layer and the weft yarns of the machine layer through a 4-harness satin weaving method.

Wherein the ratio of the number of the warp threads of the paper forming layer to the number of the warp threads of the machine layer is 1: 1; 1/2, the number of warp threads of the intermediate connecting layer accounts for the total number of warp threads of the forming wire; the ratio of the number of the wefts of the paper-forming layer to the number of the wefts of the machine layer is 2: 1; the warp density of the forming net is 75-78 pieces/cm; the density of the weft threads of the forming net is 50-56 threads/cm.

Wherein the warp threads of the paper forming layer and the weft threads of the paper forming layer are both composed of full polyester monofilaments; the first sewing warp threads and the second sewing warp threads of the middle connecting layer are both composed of all polyester monofilaments; the warp threads of the machine layer are composed of all-polyester monofilaments; the weft of the machine layer is composed of all polyester monofilaments, or the weft of the machine layer is composed of a polyester monofilament and a nylon monofilament which are alternated.

The diameters of the warp threads of the paper forming layer, the machine layer and the middle connecting layer are the same, and the diameters of the warp threads of the paper forming layer, the machine layer and the middle connecting layer are all 0.12-0.14 mm; the diameter of the weft of the paper-forming layer is 0.12-0.15 mm; the diameter of the weft of the machine layer is 0.20-0.25 mm.

In order to solve the above technical problem, another scheme adopted by the present application is: the papermaking equipment comprises the novel warp-stitched tissue paper three-layer forming net in any one of the embodiments.

Different from the prior art, the beneficial effects of the application are that: the application provides a novel warp-stitched three-layer forming net for household paper, wherein a middle connecting layer comprises paired first stitched warp threads and paired second stitched warp threads, the first stitched warp threads are interwoven with weft threads of a paper forming layer, and the second stitched warp threads are interwoven with weft threads of a machine layer to be connected into the paper layer and the machine layer; the forming net is formed by interweaving polyester monofilaments or nylon monofilaments by 16 heald frames and comprises a plurality of minimum tissue units, wherein the minimum tissue units are formed by interweaving warp yarns consisting of 16 polyester monofilaments and weft yarns consisting of 24 polyester monofilaments or nylon monofilaments. In the forming net, the paired first sewing warp threads and the paired second sewing warp threads connect the paper forming layer with the machine layer, so that the upper layer and the lower layer are combined more tightly and firmly, the internal abrasion and layering phenomena are eliminated, and the service life is prolonged. The minimum organization unit can improve the fiber support index of the forming net, the paper sheet is formed uniformly, the water content in the forming net is small, and the dewatering is faster.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Wherein:

FIG. 1 is a schematic structural view of an embodiment of the novel warp-stitched tissue three-layer forming fabric of the present application;

FIG. 2 is a schematic structural diagram of an embodiment of the smallest tissue unit of the novel warp-stitched tissue paper three-layer forming net of the present application;

FIG. 3 is a schematic diagram of the structure of an embodiment of the papermaking apparatus of the present application;

FIG. 4 is a schematic structural diagram of an embodiment of the novel warp-stitched tissue three-layer forming net of the present invention in which the 1 st to 12 th weft threads are woven in steps;

FIG. 5 is a schematic structural diagram of an embodiment of the novel warp-stitched tissue three-layer forming net of the present invention in which the 13 th to 24 th weft threads are woven in steps.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1 and 2, fig. 1 is a schematic structural diagram of an embodiment of the novel warp-stitched tissue three-layer forming net of the present application, and fig. 2 is a schematic structural diagram of an embodiment of a minimum organization unit of the novel warp-stitched tissue three-layer forming net of the present application. As shown in fig. 1, the novel warp-stitched tissue paper three-layer forming fabric 1 of the present application comprises: a paper-forming layer 10, an intermediate tie layer 12 and a machine layer 14; wherein, the intermediate connecting layer 12 comprises a pair of first sewing warp 120 and second sewing warp 122, the first sewing warp 120 interweaves with the weft 100 of the paper-making layer 10 to support the paper surface, and the second sewing warp 122 interweaves with the weft 140 of the machine layer 14 to play the role of sewing the paper-making layer 10 and the machine layer 14. Due to the fact that the paper layer 10 and the machine layer 14 are longitudinally connected through the warps, the upper layer and the lower layer are combined more tightly and firmly, and internal abrasion and layering are eliminated. Further, the forming net 1 is formed by interweaving polyester monofilaments or nylon monofilaments by 16 heald frames and comprises a plurality of minimum weave units, wherein the minimum weave units are formed by interweaving warps formed by 16 polyester monofilaments and wefts formed by 24 polyester monofilaments or nylon monofilaments.

As shown in FIG. 2, white represents the weft over the warp, black represents the warp over the weft, and the shaded boxes represent the warp over the weft. The 16 warp threads are grouped into four warp threads, one warp thread 102 of the paper forming layer 10, one warp thread 142 of the machine layer 14, the first stitching warp thread 120 and the second stitching warp thread 122. The order of arrangement of the warp threads 102 of the paper forming layer 10, the warp threads 142 of the machine layer 14, the first stitching warp threads 120 and the second stitching warp threads 122 in the above-described one cycle is not limited. The 24 weft yarns are one cycle every three yarns from top to bottom, the 1 st and 3 rd weft yarns are the weft yarns 100 of the paper forming layer 10, and the 2 nd weft yarn 140 of the machine layer 14. Through the interweaving mode, the fiber support index of the forming net 1 can be improved, paper sheets are formed uniformly, the water content in the forming net is low, dewatering is quicker, and the upper layer and the lower layer are combined more tightly and firmly.

In one application scenario, with continued reference to fig. 1, the warp yarns include the warp yarns 102 of the paper-forming layer 10 and the warp yarns 142 of the machine layer 14, and the weft yarns include the weft yarns 100 of the paper-forming layer 10 and the weft yarns 140 of the machine layer 14. In the present embodiment, the weft 100 of the paper-making layer 10 and the warp 102 of the paper-making layer 10 may both be composed of all-polyester monofilament. The first and second stitched

warp threads

120, 122 of the intermediate connecting layer 12 may each be composed of an all polyester monofilament. The warp threads 142 of the machine layer 14 are comprised of all polyester monofilament, the weft threads 140 of the machine layer 14 are comprised of all polyester monofilament, or the weft threads 140 of the machine layer 14 are comprised of one polyester monofilament alternating with one nylon monofilament. The design mode can increase the warp density of the surface layer, improve the smoothness of the net surface of the forming net 1 and improve the fiber support index of the forming net 1 and the fiber retention rate of paper.

In another application scenario, the paper forming layer 10 may be formed by weaving through a 4 harness satin weave. Specifically, the 4-harness satin weaving method is such that the weft 100 of each paper-forming layer 10 crosses over every two and every two warps 102 of the paper-forming layer 10, or the weft 100 of each paper-forming layer 10 crosses over every one and every three warps 102 of the paper-forming layer 10. By the weaving method, the forming net 1 can be more compact in structure, the running stability is improved, and the service life is prolonged. Of course, in other embodiments, the paper-forming layer 10 may also adopt other weaving methods, such as a 5-harness satin weaving method, which is not limited in the present application.

In another application scenario, the machine layer 14 may be formed by weaving with a 4 harness satin weave. Specifically, the 4-harness satin weave is such that the weft yarn 140 of each machine layer 14 passes up and down every two and every two machine layer 14 warp yarns 142 crosswise, or the weft yarn 140 of each machine layer 14 passes up and down every one and every three machine layer 14 warp yarns 142 crosswise. By the weaving method, the forming net structure is more compact, the running stability is improved, and the service life is prolonged. Of course, in other embodiments, the machine layer 14 may also adopt other weaving methods, such as a 5 harness satin weave, which is not limited in this application.

In yet another application scenario, the number ratio of the warp threads 102 of the paper forming layer 10 to the warp threads 142 of the machine layer 14 is 1: 1. The number of warp threads of the intermediate connecting layer 12 is 1/2 of the total number of warp threads of the forming wire 1, and the minimum organization unit of the forming wire 1 comprises 8 warp threads of the intermediate connecting layer 12. Since all the warp threads are warp threads in the intermediate connecting layer 12 in this embodiment, in the field of papermaking technology, the first sewing warp threads 120 and the second sewing warp threads 122 arranged in pairs in the intermediate connecting layer 12 of the forming wire 1 correspond to the warp threads 102 of one paper forming layer 10, and therefore, in the ratio of the number of the warp threads 102 of the paper forming layer 10 to the number of the warp threads 142 of the machine layer 14, the number of the warp threads 102 of the paper forming layer 10 includes the number of the sewing warp threads of the intermediate connecting layer 12; when the number of warp threads of the intermediate connecting layer 12 is 1/2 of the total number of warp threads of the forming wire 1, the ratio of the number of warp threads 102 of the paper-forming layer 10, the number of first and second

sewing warp threads

120, 122 of the intermediate connecting layer 12 and the number of warp threads 142 of the machine layer 14 is 1:2: 1. That is, in the minimum weave unit of the forming wire 1, the number of warp threads 102 of the paper-forming layer 10 is 4, the number of first and second

sewing warp threads

120 and 122 of the intermediate connecting layer 12 is 8, and the number of warp threads 142 of the machine layer 14 is 4.

In a further application scenario, the number ratio of the weft threads 100 of the paper forming layer 10 to the weft threads 140 of the machine layer 14 is 2: 1. I.e. containing 16 weft threads 100 of the paper-forming

layer

10 and 8 weft threads 140 of the machine layer 14 in the smallest weave unit of the forming wire 1 described above.

In a further application scenario, the formed web 1 prepared as described above has a warp density of 75-78, e.g., 75, 76, 77, 78, and a weft density of 50-56, e.g., 50, 51, 52, 53, 54, 55, 56, etc. threads/cm.

In still another application scenario, in the above embodiment, the warp threads 102 of the paper-forming layer 10, the warp threads 142 of the machine layer 14 and the first and second

stitching warp threads

120 and 122 of the intermediate connecting layer 12 have the same diameter, which is 0.12-0.14mm, such as 0.12mm, 0.13mm, 0.14mm, etc., the weft threads 100 of the paper-forming layer 10 have a diameter of 0.12-0.15mm, such as 0.12mm, 0.13mm, 0.14mm, 0.15mm, etc., and the weft threads 140 of the machine layer 14 have a diameter of 0.20-0.25mm, such as 0.20mm, 0.21mm, 0.22mm, 0.23mm, 0.24mm, 0.25mm, etc.

Referring to fig. 3, fig. 3 is a schematic structural diagram of an embodiment of a papermaking apparatus of the present application, and the papermaking apparatus 2 includes the forming wire 1 in any one of the above embodiments, and the detailed structure thereof is not described herein again.

The above-described papermaking forming wire for specialty papers is further described below with an embodiment. In the present embodiment, the forming wire 1 is formed by interweaving polyester monofilaments or nylon monofilaments with 16 heald frames, the minimum weave unit is formed by 16 polyester monofilaments as warps and 24 polyester monofilaments or nylon monofilaments as wefts, the number ratio of the warps of the paper-forming layer and the machine layer is 1:1, the number ratio of the wefts is 2:1, the number of the warps of the intermediate connecting layer accounts for 1/2 of the total number of the warps of the forming wire 1, and both the paper-forming layer and the machine layer are woven by a 4-harness satin weaving method.

Referring to fig. 4 and 5, fig. 4 is a schematic structural diagram of an embodiment of stepwise weaving of the 1 st to 12 th wefts of the smallest tissue units of the novel warp-stitched tissue trilayer forming fabric of the present invention, and fig. 5 is a schematic structural diagram of an embodiment of stepwise weaving of the 13 th to 24 th wefts of the smallest tissue units of the novel warp-stitched tissue trilayer forming fabric of the present invention. Fig. 4 and 5 show the process of interweaving 24 weft yarns of the minimum organization unit of the novel warp-stitched tissue paper three-layer forming net with the warp yarns 301 of the paper-forming layer, the warp yarns 302 of the machine layer and the first stitched warp yarns 303 and the second stitched warp yarns 304 of the intermediate connecting layer. Wherein, the 1 st to 3 th, the 4 th to 6 th, the 7 th to 9 th, the 10 th to 12 th, the 13 th to 15 th and the 16 th to 18 th wefts are all a cycle. In each cycle, the 1 st and 3 rd wefts are the wefts 401 of the paper-forming layer, and the 2 nd wefts are the wefts 402 of the machine layer; the ratio of the number of weft threads of the paper layer itself to the number of weft threads of the machine layer in each three cycles described above was 2: 1. Fig. 4 and 5 show a schematic step-by-step weaving of 24 weft threads, and it can be seen that 16 weft threads 401 of the paper-making layer and 8 weft threads 402 of the machine layer are provided; dots represent the longitudinal sections of the warps, the

warps

1, 5, 9 and 13 are the warps 301 of the paper-forming layer, and the wefts 401 of the paper-forming layer cross the warps 301 of every two paper-forming layers and every two paper-forming layers by adopting a 4-harness satin weaving method; the

warp threads

2, 6, 10, 14 are the machine layer warp threads 302, and the machine layer weft threads 402 cross every two and every two machine layer warp threads 302 in a 4-harness satin weave, and the remaining

warp threads

3, 4, 7, 8, 11, 12, 15, 16 are the first and second

sewing warp threads

303, 304 of the intermediate connecting layer.

Example 1:

the performance of the paper-making forming net for special paper in example 1 was tested by using polyester monofilaments with a diameter of 0.13mm as warp yarns of the paper-making layer, polyester monofilaments with a diameter of 0.13mm as weft yarns of the paper-making layer, polyester monofilaments with a diameter of 0.13mm as warp yarns of the intermediate connecting layer, polyester monofilaments with a diameter of 0.13mm as warp yarns of the machine layer, and nylon monofilaments with a diameter of 0.20mm as weft yarns of the machine layer, which were alternately woven, according to the method in GB/T24290-2009, measurement method for paper-making forming net and drying net, and the test results are shown in table 1 below.

Example 2:

the performance test of the special paper papermaking forming net in the embodiment 1 is carried out by adopting the method in GB/T24290 plus material 2009 (measurement method for papermaking forming net and drying net), wherein the detection results are shown in the following table 1.

Table 1: novel warp-stitched paper for daily use three-layer forming net performance detection result

Performance of	Example 1 results	Example 2 results
			Warp density	76 roots/cm	76 roots/cm
Density of weft	53.3 roots/cm	51.2 roots/cm
			Thickness of forming wire	0.58mm	0.62mm
Fiber Support Index (FSI)	185	179
			Support Point (SP)	1350	1292
Index of Dehydration (DI)	46.6％	44.1％
			Surface layer open area ratio (SOA)	27.3％	28.2％
Degree of air permeability	520CFM	510CFM

As can be seen from the data in Table 1, the warp density of the novel warp-stitched tissue for daily use three-layer forming net provided by the application is large, the thickness is small, the fiber support index is high, the supporting points are increased, the dehydration index is improved, and the air permeability is increased.

The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims

1. A novel warp-stitched three-layer forming net for household paper comprises a paper forming layer, a middle connecting layer and a machine layer, and is characterized in that,

the intermediate connecting layer comprises paired first and second sewing warp threads, the first sewing warp thread is interwoven with the weft thread of the paper-forming layer, and the second sewing warp thread is interwoven with the weft thread of the machine layer so as to connect the paper-forming layer and the machine layer;

the forming net is formed by interweaving polyester monofilaments or nylon monofilaments through 16 heald frames and comprises a plurality of minimum tissue units, wherein the minimum tissue units are formed by interweaving warps formed by 16 polyester monofilaments and wefts formed by 24 polyester monofilaments or nylon monofilaments.

2. Forming wire according to claim 1,

the paper-forming layer is formed by weaving the warps of the paper-forming layer and the wefts of the paper-forming layer through a 4-harness satin weaving method.

3. Forming wire according to claim 1,

the machine layer is formed by weaving the warp yarns of the machine layer and the weft yarns of the machine layer through a 4-harness satin weaving method.

4. Forming wire according to claim 1,

the ratio of the number of the warp threads of the paper forming layer to the number of the warp threads of the machine layer is 1: 1.

5. Forming wire according to claim 4,

the number of warp threads of the intermediate connecting layer accounts for 1/2 of the total number of warp threads of the forming wire.

6. Forming wire according to claim 1,

the ratio of the number of the wefts of the paper-forming layer to the number of the wefts of the machine layer is 2: 1.

7. Forming wire according to claim 1,

the warp density of the forming net is 75-78 pieces/cm; the density of the weft threads of the forming net is 50-56 threads/cm.

8. Forming wire according to claim 1,

the warp of the paper-forming layer and the weft of the paper-forming layer are both composed of full polyester monofilaments;

the first sewing warp threads and the second sewing warp threads of the middle connecting layer are both composed of all polyester monofilaments;

the warp threads of the machine layer are composed of all-polyester monofilaments; the weft of the machine layer is composed of all polyester monofilaments, or the weft of the machine layer is composed of a polyester monofilament and a nylon monofilament which are alternated.

9. Forming wire according to any one of claims 1 to 8,

the diameters of the warp threads of the paper forming layer, the machine layer and the middle connecting layer are the same, and the diameters of the warp threads of the paper forming layer, the machine layer and the middle connecting layer are all 0.12-0.14 mm;

the diameter of the weft of the paper-forming layer is 0.12-0.15 mm; the diameter of the weft of the machine layer is 0.20-0.25 mm.

10. A papermaking plant comprising a novel warp-stitched tissue three-layer forming fabric according to any one of claims 1 to 9.