Production method of flame-retardant high-temperature resistant pre-oxidized fiber aramid fiber blended yarn

Abstract

The invention relates to a flame-retardant high-temperature resistant pre-oxidized fiber aramid fiber blended yarn and a production method thereof. The blended yarn is composed of 50-90mass% of pre-oxidized fiber chopped fibers and 50-10mass% of aramid fiber 1313 chopped fibers; the production process flow comprises the following steps of carrying out pretreatment on the pre-oxidized fiber choppedfibers and the aramid fiber chopped fibers separately; performing cotton package mixing on the pre-oxidized fiber chopped fibers and the aramid fiber 1313 chopped fibers in an opening picking procedure to prepare cotton rolls; preparing the cotton rolls into carding silvers in a cotton carding procedure; preparing the carding silvers into drawing silvers through two drawing procedures; preparingthe drawing silvers into roving through a roving procedure; preparing the roving into spun yarns through a spinning procedure; and preparing the spun yarns into a pre-oxidized fiber aramid fiber blended yarn spool through a spooling procedure. The method combines the pre-oxidized fiber and aramid fiber 1313 flame-retardant high-temperature resistant advantages, overcomes the shortcoming of poor spinning performance of the pre-oxidized fiber, and the woven pre-oxidized fiber aramid fiber 1313 blended yarn has excellent quality.

Description

technical field [0001] The invention relates to the field of novel yarns, in particular to a production method of flame-retardant and high-temperature-resistant pre-oxidized aramid fiber blended yarn. Background technique [0002] Thermal protective clothing is widely used in work clothes for firefighters, army soldiers, emergency rescue, petrochemical, natural gas, food processing and other industries. Traditional thermal protective clothing only achieves the heat insulation index by increasing the weight and thickness of the heat insulation layer, but this method reduces the comfort to a certain extent, affects the on-the-spot judgment of firefighters, reduces the combat efficiency, and increases the damage to the human body. injury and property damage. [0003] The limiting oxygen index of pre-oxidized chopped strand fiber is higher than 40, the thermal conductivity is about 0.05w / m.k, and the working temperature is close to 1500°C, which meets the requirements for the u...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to develop a blended yarn of pre-oxygenated chopped strands and aramid 1313 chopped fibers and a production method thereof, so as to solve the poor spinnability of pre-oxidized chopped strands and improve the flame-retardant insulation of aramid 1313. Thermal performance, so that the yarn has better high temperature resistance and flame retardancy