SU755914A1 - Method of manufacturing nonwoven material - Google Patents

Description

The invention relates to the technology of manufacturing a fibrous canvas for nonwoven materials and can find application in the textile industry

A method for manufacturing a nonwoven fabric, the method comprising the fibrous ^{5 * * * *} canvas magnifies reinforcing yarns laid on the receiving surface in multiple layers in a direction perpendicular to the movement of the receiving surface _(with mixing each preceding layer with respect to the next po- ¹⁰ [ one].

However, the known method does not provide the required quality of the fibrous canvas due to the fact that the reinforcing yarns are stacked zigzag along the canvas, which does not allow full use of their strength properties.

The aim of the invention is to improve the quality of the material by enhancing the canvas. . _m

The goal is achieved by placing the reinforcing threads parallel to one another at a predetermined distance, and the offset value of each previous layer is relative to 2

The following is determined by the ratio of the width of the canvas to the number of its layers in the material, while the distance of the reinforcing threads from the edges of the canvas is determined by the ratio

K t

B p ’

where t is the sequence number of the layer; η is the number of layers in the canvas;

B is the width of the canvas;

K - the distance of the reinforcing threads from

edges of the canvas.

The drawing shows a diagram of a method of manufacturing a nonwoven material.

Other 1 enters the upper conveyor

2, where reinforcing yarns 3 are stacked on it in parallel rows, after which it, along with the yarns, is conveyed by the middle conveyor 4 to the lower conveyor 5, which lays it in several layers into the fibrous canvas 6 on the transverse discharge conveyor 7. When the removal conveyor 7 moves, the layers webs move one relatively

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other by a given amount. As a reinforcing yarn can be used yarn, multifilament yarn to monofilament.

In the manufacture of non-woven material by the proposed method, it is not recommended to lay 5 · reinforcing yarns on the top (t = 1) and bottom (t = n) carding layers ^ since in both cases the threads that are not covered with a layer of batt are pulled off from the canvas during its operation, thereby reducing the strength and quality of the nonwoven material.

Thus, reinforcing yarns must be laid on a batt layer, the sequence number of which must satisfy the following relationship 15

1 <m n - 1.

Such an arrangement of reinforcing threads between the layers of webs in the canvas leads to a fuller use of the strength properties of the threads, which are arranged in an orderly manner 20 thicker than the canvas at a certain depth.

Claims (2)

Claim 25 1. A method of manufacturing a nonwoven material, which consists in the fact that the fibrous canvas is reinforced with reinforcing threads, stack on the receiving surface in several layers in the direction perpendicular to the displacement of the receiving surface, with the displacement of each previous layer with respect to the subsequent one, about the same and with the I, with the fact that, in order to improve the quality of the material, the canvas is reinforced by placing the reinforcing threads parallel to each other at a given distance from the edge of the canvas, and the offset value of each previous layer relative to the next is determined by the ratio of the width of the canvas to the number of its layers in the material. 2. The method according to π. 1, that is, by the fact that the distance of the reinforcing threads from the edge of the canvas is determined from the relation K t B η where t is the sequence number of the layer; η is the number of layers; B is the width of the canvas; K - the distance of the reinforcing threads from the edge of the canvas.