WO2017161511A1 - Weft self-binding forming fabric - Google Patents

Abstract

A weft self-binding forming fabric comprises a face layer, a bottom layer, and connection lines. The face layer is a plain structure formed by alternately interlacing face warps and face wefts. The bottom layer is a satin structure formed by alternately interlacing bottom warps and bottom wefts. The connection lines are arranged in pairs, and connect the face layer and the bottom layer in the weft direction. The connection lines of the forming fabric alternately interlace the upper-layer net and the lower-layer net regularly, so that the upper-layer net and the lower-layer net are connected together, the twisting movements and slides are unlikely to occur, thereby eliminating internal abrasion.

Description

Weft self-binding forming network Weft self-binding forming network

 Technical field

 The invention relates to the technical field of forming nets for papermaking, in particular to a weft self-binding forming net.

 Background technique

Along with the development of the paper industry, the paper forming network has undergone a development process from single to diversity; single layer network → double layer network → two layer and half network → three layers and half network → three layers of network → weft connection SSB three layer network → Warp connection SSB network.

In recent years, with the increase of paper machine width and speed, the use of single-layer net has been greatly reduced, and the proportion of two-layer and half-net is affected by the three-layer network is also decreasing. The s-line connection SSB network from 2004 Since the beginning of the year, the usage has increased year by year. It is already a mature product in the international market, but its development is relatively slow. The main reason is that it is limited by the function of the original weaving machine.

 The existing 16-series weaving machine, the 16-integrated three-layer net weaved, is often 3: 2 Structural. Although the three-layer net of such a structure can basically accomplish the task of forming and dewatering the paper on the paper machine, the disadvantage is that the existing paper forming net has a rough surface and is easy to form a web mark on the paper surface. Uneven formation, not suitable for the production of high-grade paper. Moreover, the existing paper forming fabric is easy to produce interlayer separation and relative displacement, and the wear resistance of the machine layer and the paper machine contact surface is insufficient, resulting in a short service life of the paper forming fabric.

 Summary of the invention

 The invention provides a weft self-binding forming network to solve the existing forming network The paper surface is uneven, the paper surface is improved, the adhesion between the layers is weak, and the service life is short.

 In order to solve the above technical problems, the technical solution adopted by the present invention is:

 One kind a weft self-binding forming net comprising a top layer, a bottom layer and a connecting line, the surface layer being a plain weave structure alternately interlaced by a face warp and a weft weft, the bottom layer being a satin structure alternately interlaced by a bottom warp and a bottom weft, The connecting lines are arranged in pairs, connecting the surface layer and the bottom layer from the weft direction.

 Wherein, preferably, the number of the connecting lines is 1/2 of the total number of the weft and the bottom weft.

 Preferably, the connecting line is arranged between the weft or the bottom weft.

 Wherein, preferably, the connecting line is a nylon weft.

 Wherein, preferably, the surface warp and bottom warp are polyester warp threads, and the weft and bottom weft are polyester or nylon weft threads.

 Wherein, preferably, the ratio of the face to the bottom is 1 : 1 .

 Wherein, preferably, the bottom layer is an 8-satin satin structure.

 Wherein, preferably, the polyester or nylon monofilament is interwoven by a 16-piece heald frame, and the smallest woven structural unit is composed of 16 polyester warps and 32 polyester or nylon weft threads.

 The beneficial effects of the invention:

 1. The present invention adopts a 1/1 plain weave structure in the paper forming layer to increase the fiber support index and uniform mesh. In the bottom layer, use 8- The satin weave weave increases the span of the bottom weft, so that the wear resistance of the machine layer is enhanced and the running stability is stable. The number of pairs of nylon wefts in the intermediate connecting layer accounts for 1/2 of the total number of wefts This supports and interlaces the paper surface to improve the bonding between the layers.

 2. The invention randomly interlaces the connecting lines in the upper and lower two-layer nets, so that the upper and lower two-layer nets are integrally connected without causing relative swaying and slipping, thereby eliminating internal wear.

 3. The weft self-binding forming mesh of the invention has uniform mesh size and high paper quality, which can prevent internal wear of the three-layer net and has a longer service life.

 4. The weft self-binding forming net of the present invention has a wide range of applications and can be widely applied in the production field of the paper industry.

 DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

 BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a sequence diagram showing the arrangement of the minimum unit loop weaving tissue lines of the present invention.

 detailed description

The technical solutions of the present invention are clearly and completely described in the following with reference to the accompanying drawings, and it is obvious that the description is only one embodiment of the invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

 Figure 1 As shown in the figure, the present embodiment provides a weft self-binding forming fabric, which comprises a surface layer, a bottom layer and a connecting line. The surface layer is a plain weave structure alternately interlaced by surface and weft, so that the fiber support index is improved and the mesh is uniform. . The bottom layer is alternately interwoven by bottom and bottom weft 8- The satin-like structure increases the span of the bottom weft, so that the wear resistance of the machine layer is enhanced and the running stability is stable. The connecting lines are arranged in pairs to connect the surface layer and the bottom layer from the weft direction. The number of the connecting lines is 1/2 of the total number of weft and bottom weft . The connecting line is arranged between the weft or the bottom weft. The connecting line is a nylon weft. The number of pairs of nylon wefts in the intermediate connecting layer accounts for 1/2 of the total number of wefts This supports and interlaces the paper surface to improve the bonding between the layers.

 Wherein, the surface warp and bottom warp are polyester warp threads, and the weft and bottom weft are polyester or nylon weft threads.

 Wherein the ratio of the face to the bottom is 1 : 1 .

 Wherein, the weft self-binding forming net of the embodiment is formed by interweaving polyester or nylon monofilaments from 16 heald frames, and the minimum weaving structure unit is composed of 16 polyester warp threads and 32 polyester or nylon weft threads.

 The weft self-binding forming net of the present embodiment is prepared by the following steps:

 1. Raw material procurement: According to the research and development plan, imported German PET monofilament and PA monofilament.

 2, raw material inspection: according to research and development requirements, raw material inspection wire diameter, heat shrinkage value (180 °C, 30min) %, breaking strength ( cN/TEX), elongation at break (%).

 According to the research and development requirements, sampling and full inspection. The indicators are as follows:

 Warp PET : ¢ 0.13- ¢ 0.21 , breaking strength ( cN / TEX ) > 65 , heat shrinkage value 14% Left and right, the elongation at break is between 11-13%.

 Weft 1PET : ¢ 0.13 , breaking strength ( cN / TEX ) 40 or so, heat shrinkage value 2% Left and right, the elongation at break is between 30-35%.

 Weft 2PA : ¢ 0.13- ¢ 0.17 , breaking strength ( cN/TEX ) 50 or so, heat shrinkage 6% Left and right, the elongation at break is between 30-35%.

 Weft 3PET : ¢ 0.30 - ¢ 0.40 Breaking strength ( cN / TEX ) 40 or so, heat shrinkage value Around 12.5%, the elongation at break is around 30%.

 Weft 4PA : ¢ 0.40- ¢ 0.50 , breaking strength ( cN/TEX ) 40 or so, heat shrinkage value 13% Left and right, the elongation at break is between 30-35%.

 3, warping: requires uniform tension of each monofilament, requires uniform arrangement of monofilament, requires uniform warping speed, warping speed 20M / min, Tension 60KG / disk.

 4, wearing a comprehensive wear 筘: in turn, wear a comprehensive wear 筘, in order into the heald frame 筘.

 5, weaving net: according to the net pattern using 16 heald mesh, a number of circular wefts 32, face: bottom = 1 : 1 The bottom weft is made of PET and PA, 1 : 1 is used. The density is 52 pieces/cm and the weft density is 60-70 pieces/cm.

 6. Inspection network: Inspection and repair of semi-finished products, providing reference for reasonable cutting.

 7 The first setting: Through the temperature, longitudinal and transverse tension, and the number of turns of the setting machine, the structure of the semi-finished net is changed, so that the warp is stretched and the weft is shrunk to make it reach a certain structure and meet the requirements of the paper machine.

 8. Cut the net: Make reasonable cutting of the semi-finished net to meet the order size and quality requirements, and at the same time maximize the cutting rate.

 9. Plug-in: Connect the two ends of the net according to the original netting, so that the interface meets the specified process parameters to meet the requirements of the paper mill.

 10, the second setting: uniform and adjust the length and width of the net, handle the interface problem, the secondary setting temperature is 150 Degree, the machine runs a circle, the network port can be flat.

 11. Finished product inspection: Inspect the quality of the finished product and repair the repairable net disease in time to prevent the defective products from leaving the factory.

 12 Packing and warehousing: Packing the qualified finished nets into the warehouse to prevent the nets from being damaged during transportation. At the same time, the appearance, model, specifications, direction, moisture-proof signs, and light-handed signs of the packing boxes are clearly marked.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., which are included in the spirit and scope of the present invention, should be included in the present invention. Within the scope of protection.

Claims (8)

1. A weft self-binding forming net comprising a surface layer, a bottom layer and a connecting line, wherein the surface layer is a plain weave structure alternately interlaced by a face and a weft, and the bottom layer is a satin structure alternately interlaced by a bottom warp and a bottom weft. The utility model is characterized in that the connecting lines are arranged in pairs, and the surface layer and the bottom layer are connected from the weft direction.
2. A weft self-binding forming net according to claim 1, wherein the number of the connecting lines is 1/2 of the total number of the weft and the bottom weft.
3. A weft self-binding forming net according to claim 2, wherein said connecting line is arranged with said face weft or said bottom weft.
4. A weft self-binding forming net according to claim 1, wherein the connecting line is a nylon weft.
5. A weft self-binding forming fabric according to claim 1, wherein said face and bottom threads are polyester warp threads, and said face weft and bottom weft are polyester or nylon weft threads.
6. A weft self-binding forming fabric according to claim 1 wherein the ratio of said face to said bottom is 1:1.
7. A weft self-binding forming net according to claim 1, wherein said bottom layer is an 8-satin satin structure.
8. A weft self-binding forming net according to claim 1, wherein the polyester or nylon monofilament is interwoven by 16 heald frames, and the smallest woven structural unit is composed of 16 polyester warps and 32 polyester or nylon weft threads.