Heat-resistant nylon 66 as-spun filament and indirect spinning method thereof, and application of as-spun filament in producing high-elasticity weft

Abstract

The invention provides a heat-resistant nylon 66 as-spun filament which comprises nylon 66 and a heat-resistant agent in a ratio of (100-1000):1; and the heat-resistant agent comprises copper acetate and potassium iodide in a ratio of 1:(3-20). The invention also provides an indirect spinning method of the heat-resistant nylon 66 as-spun filament and application of the heat-resistant nylon 66 as-spun filament in producing high-elasticity weft. The production cost of the heat-resistant nylon 66 as-spun filament is greatly lowered; and the copper acetate has favorable heat stability in the polymerization or spinning process, and can not be lost or decomposed, so that the heat resistance is greatly enhanced. Thus, after the spun weft is subjected to 240-DEG C heat treatment for 3 minutes, the high power is 312cN, and the elongation percentage is 245%; and after gum dipping, the high power is greater than 295cN, and the elongation percentage is greater than 228%, thereby completely satisfying the requirements of the radial tire builder fabric for the elastic weft.

Description

technical field [0001] The present invention relates to a nylon winding yarn and its production method and its application in the production of weft yarn, in particular to a heat-resistant nylon 66 winding yarn and its indirect spinning method and its application in the production of high-strength elastic weft yarn, which belongs to weft yarn field of manufacturing technology. Background technique [0002] Cord fabric is a necessary skeleton material in tire production. The radialization of tires represents the latest level and development trend of today's tire industry, and elastic weft yarn is one of the important raw materials for producing radial tire cord fabrics. Ordinary cord fabrics use pure cotton yarns as weft yarns, which have low strength, small elongation, and poor elasticity. During the tire calendering process, the weft yarns are easily broken, causing the warp yarns to be scattered, affecting the quality of the tires, and cannot meet the requirements of high-...

AI Technical Summary

Problems solved by technology

[0006] (1) The existing nylon 66 winding yarn has poor heat resistance;

[0007] (2) The existing nylon 66 winding yarn has insufficient spinning fineness, low fiber strength and low fiber elongation;

[0008] (3) The existing nylon 66 winding yarn has poor mechanical properties, after heat treatment at 240°C, the elastic elongation and strength are lost, and the heat resistance is poor;

[0009] (4) The heat-resistant agent used in the existing nylon 66 winding yarn has poor stability and is prone to loss or decomposition;

[0010] (5) The existing production method of nylon 66 winding yarn is high in production cost, complicated in method, and difficult to master and operate