RU2122610C1 - Reinforced thread for manufacture of high-strength articles - Google Patents

Abstract

FIELD: textile industry. SUBSTANCE: reinforced thread has flexible core with at least one high-strength corrosion-resisting metal wire, at least one high-modulus chemical thread and sheathing formed as compacted fibrous member for twisting core under tension. Ratio of total density of core chemical thread and linear density of compacted core is 1 : (0.8-3.5). High-modulus threads have linear density of 22-167 tex. Wire manufactured from chromium-nickel alloy has diameter of 0.02-0.15 mm. EFFECT: increased wear-resistivity of reinforced thread fibrous sheathing, improved quality and increased service life of articles manufactured from reinforced threads. 3 cl, 1 dwg, 1 tbl

Description

 The invention relates to the textile industry and relates to reinforced threads for high-strength products, in particular, protective gloves, sleeves, filter materials, etc.

 Known reinforced thread for high-strength products, containing a flexible core having at least one wire made of stainless steel and at least one aramid thread, and a sheath (see SU 1080748 A, 03/15/84).

 In this thread, a core with a metal wire with a diameter of 0.02 - 0.15 mm and an aramid thread is twisted in two opposite directions with synthetic threads that form the sheath. Wrapping the core with threads leads to increased stiffness of the reinforced thread and does not provide a continuous coating of its core. The increased stiffness of the reinforced thread complicates its further processing. The exit of the core to the surface of the reinforced thread dramatically reduces the strength of the thread to cut. The metal wire is easily damaged during the operation of products made of thread, which significantly reduces the time of their use.

 Known reinforced thread for high-strength products, containing a flexible core having at least one high-strength corrosion-resistant metal wire and at least one high-modulus chemical thread, and a sheath (see RU 2057213 C1, 03.27.96. Adopted as a prototype).

 The shell is made of loose fibers fixed to the core by twisting in the air stream. Known reinforced thread is relatively low stiffness and allows you to produce products with high density. The use of natural fibers in the sheath increases the hygroscopicity of the thread and its products.

 The disadvantages of the reinforced yarn adopted for the prototype include weak fixation of the fiber on the smooth surface of the core. Sheath fibers wrap the core threads with a loose layer of air flow without sufficient tension. A slightly sealed layer of the sheath cannot provide significant resistance in contact with the thread of the tip of the blade of the cutting element. In addition, in the process of forming products from a known thread, loosely fixed fibers are displaced along the core, exposing the wire, lowering the protective properties of the products and shortening their life.

 The aim of the invention is to obtain a technical result, which consists in increasing the wear resistance of the fibrous sheath of the reinforced thread and the strength of the thread to cut, as well as to improve the quality and increase the life of products made from reinforced thread.

 The specified technical result is achieved in that in a reinforced yarn for obtaining high-strength products containing a flexible core having at least one high-strength corrosion-resistant metal wire and at least one high-modulus chemical thread, and the sheath according to the invention, the sheath is made in the form of a compacted fibrous sliver , wrapping the core under tension, and the ratio of the total linear density of the chemical threads of the core to the linear density of the sliver is 1: (0.8 - 3.5). High-modulus chemical threads are made of linear density equal to 22 - 167 tex. In addition, the feature of the thread is that high-strength corrosion-resistant wires are made of a nickel-chromium alloy with a diameter of 0.02 - 0.15 mm.

 The claimed structure of the fibrous sheath in the form of a fibrous sliver core wrapping under tension and the limits of the ratio of linear densities of the sliver to the chemical threads of the core provide continuous fiber core covering, a high degree of fiber fixation on the core and the protective properties of the reinforced thread. The fibers do not move along the core in the manufacture of high-strength products from reinforced yarn. The quality of products from the thread and the terms of their use are increasing. Exceeding the above upper limits of the ratio of linear densities of high modulus threads and sliver leads to a weakening of the fastening of short fibers in the sheath and an increase in the stiffness of the reinforced thread. With a decrease in the proportion of fiber sliver below the stated limits, the continuity of the core fiber core is violated.

 The drawing shows a reinforced thread of the claimed structure.

 Reinforced thread 1 contains a flexible core having at least one metal corrosion-resistant wire 2 with a diameter of 0.02 - 0.15 mm and at least one high-modulus thread 3 of linear density 22 - 167 tex, as well as a sheath made in the form of a twisting under tension the core of the fibrous sliver 4, and the ratio of the total linear density of the high modulus filaments 3 to the linear density of the sliver 4 is 1: (0.8 - 3.5). The diameter of the wire 2 has a smaller effect on the coating quality of the sheath of the reinforced thread 1 than the total linear density of the high modulus threads 3 due to the significantly larger diameter of the threads 3 compared to the diameter of the wire 2. The specific choice of the linear density of the sliver 4 depends on the degree of compaction at wrapping the core, the properties of the fibers in the sheath and the diameter of the wire. With an increase in the seal of the sliver 4, its width decreases, which leads to the need to increase the linear density of the sliver to ensure continuous core fiber core. The tension of the fibers during the wrapping of the core and the degree of compaction of the toe 4 is determined mainly by the design of the torsion clamp of the spinning and reinforcing machine.

Wire 2 can be made of chromium-nickel alloy with a strength of at least 110 kg / mm ² . An optimum combination of strength and flexibility of the core metal component is achieved.

 Fibrous sliver 4 may be made of cotton, wool, chemical fibers or mixtures thereof. With an increase in the length of the fibers used, the strength of their fastening in the reinforced thread also increases.

 Depending on the linear densities of the components of the core and the fiber sliver 4, as well as the degree of compaction, the fuel twist of the reinforced thread 1 is set in the range of 600 - 1500 cr / m.

 Reinforced thread is produced on a spinning-reinforcing rotor machine with a fibrous sliver seal in the twisting clamp of the rotor and when using known technological modes.

 Example. The core has one wire with a diameter of 0.08 mm made of chromium-nickel alloy, and one aromatic polyamide Kevlar thread with a linear density of 58.8 tex. The shell uses cotton fibers.

 The properties of the reinforced yarn of the claimed structure with different contents of the fibrous sliver are shown in the table.

 From the data given in the table, it follows that the reinforced thread of the claimed structure is characterized in comparison with the prototype increased wear resistance of the fibrous sheath and cut resistance.

Claims (3)

 1. Reinforced thread for high-strength products, containing a flexible core having at least one high-strength corrosion-resistant metal wire and at least one high-modulus chemical thread, and a sheath, characterized in that the sheath is made in the form of a compacted fibrous sliver, wrapping under core tension, and the ratio of the total linear density of the chemical threads of the core to the linear density of the sliver is 1: (0.8 - 3.5).  2. Reinforced thread according to claim 1, characterized in that the high-modulus chemical threads are made of linear density equal to 22 - 167 tex.  3. Reinforced thread according to claims 1 and 2, characterized in that the high-strength corrosion-resistant wires are made of a nickel-chromium alloy with a diameter of 0.02 - 0.15 mm.

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