SU1441840A1 - Synthetic woven wire cloth for paper-making machine - Google Patents

Abstract

The wire-cloth is intended for production of thin paper grades and is made of interwoven warp threads 1 and alternating main weft threads 2 and additional weft threads 3, with the weaving pattern repeat of the warp threads 1 equalling five, and the weaving pattern repeat of the weft threads 2,3 equalling ten. In the pattern repeat, each main weft thread 2 underlies one and overlies four successive warp threads 1, the points 4 of interweaving with the warp threads 1 being staggered every second warp thread 1. Each additional weft thread 3 passes under one warp thread, over two, under one and over one forming two interweaving points 5 and 6 with the warp threads 1, one 5 of these points being accommodated diagonally (a-a) intermediate the interweaving points 4. The threads are preferably of synthetic material. <IMAGE>

Description

The invention relates to special technical fabrics and can be used in the construction of synthetic meshes used in a papermaking machine for forming a paper web.

The purpose of the invention is to improve the performance by increasing the retention of fine fiber and preserving the dehydration ability

Figure 1 shows the interweaving of the grid; in fig. 2 - rapport weave of synthetic woven mesh (interlacing points are shaded); Fig. 3 is a section of the grid along the weft yarns (odd with one interlacing point and Even, with two interlacing points) i in Fig. 4, section of the grid along the warp threads.

The synthetic mesh is made of two systems and the warp - warp and weft, has a rapport on the basis of five and one duck - ten. In the repeat of the basis, the threads alternate with two interlacing. The odd string 2 duck passes under the four warp threads, is interlaced with 5 and passes over it. Each additional even thread 3 passes under one, above two, under one, over one main 1 thread, followed by repeating the position of the thread.

In duck rapport, odd weft yarns 2 are interlaced with 1,3,5,2 and 4 yarns of the warp, respectively, even extra weft yarns 3 interlaced with c2 and 5, 4, 2, 1 and 45 Zi1.5 and 3 main threads.

An example of a mesh made Two samples of synthetic mesh were made with the following binding

In the base repeat (see Fig. 1), each odd thread 2 weft passes under the four threads of the base, is interwoven with 5 threads and passes over it, then the pattern is repeated. Each even thread 3 passes under one, over two, under one, over one main thread 1, then is interwoven with a warp and the pattern is repeated. In weft rapport, the odd weft yarns are interlaced, respectively, with, 1,3,5,2, and 4 yarn of the warp, then the pattern repeats.

The even weft yarns are interlaced with c2 and 5, 4, 2, 1, 4, zi1.5, and 3 main threads;

torus The first sample is made of polyester monofilament with a diameter of 0.20 mm for the base, and 0.22 mm for a weft (ofte yarn). The second sample is made of polyester monofilament with a core diameter of 0.20 mm, an odd weft yarn diameter of 0.22 mm, an even weft yarn of 0.18 mm.

The table shows the performance of the grid in comparison with the known nets made on the same and i; ex weaving looms.

The choice of the specific diameter of the weft yarns and the base depends on the type of paper being cast on the grid. With an increase in the diameter of the even weft yarn over the diameter of the odd yarn, a marking mark is observed on the paper, i.e. its lumen deteriorates as the diameter of the even weft yarn is smaller than 0.80 mm and the odd yarn diameter decreases, the mesh strength decreases and its service life decreases.

The proposed mesh has a smooth forming surface, i.e. long weaves of the main threads are formed in the machine direction (the direction of movement of the mesh on the grid table and the removal of the paper web),

The reference side of the grid has a longitudinal smoothness, i.e. long overlaps of weft threads in the transverse direction are formed, which slows the mesh wear on the surface of the dewatering elements of the grid table

Claims (2)

Invention Formula 9 1, Synthetic woven mesh lp of a papermaking machine containing interwoven warp threads and a number of primary and secondary weft threads interwoven between them, the first of which have a satin weave, characterized in that, in order to improve performance by increasing retention of small fiber and preserving dewatering ability, the rapport of the mesh on the base is equal to five duck-ten, the main weft is intertwined with the first, third, fifth, second and fourth threads of the base, and will add flax weft sootvetstvepmo - the second and fifth, fourth, second, first and fourth, third, first, third and fifth bases bubbled yarns. lA-ilB O . 2. The netting according to Clause I., T.L.H.W. — Its diameter is P, 80–1.0 km, with the fact that the supplement for the main duck, the ducks are monofilament and Synthetic mesh indicators characterizing its operational properties and purpose (pu9. 1 dui.Z