High-viscosity low-rheology polyhexamethylene adipamide special fiber and production method thereof

Abstract

The invention relates to polyhexamethylene adipamide, and especially relates to high-viscosity low-rheology polyhexamethylene adipamide special fiber and a production method thereof. The technical scheme mainly solves the technological problems that in the prior art, in a polymerization manufacture and spinning process of polyarmide fiber, in order to obtain a high-molecular-weight polymer, the polymer is usually extremely high in viscosity and rheological motion resistance, thereby leading to extremely bad spinnability, and especially in the case that the polymer relative viscosity is 104-118, normal spinning production cannot be realized; and if the relative viscosity is blindly reduced, the polymer molecular weight is reduced, strength and other indexes of the prepared fiber are extremely bad, and thus industrialized usage conditions cannot be satisfied, and the like. The disclosed fiber comprises the following compositions in parts by weight: 0.2-0.6 part of glutaric acid (C5H8O4), 0.8-1.5 parts of adipic acid (C6H16N2), and 0.9-1.9 parts of hexylenediamine (C6H10O4). The polyhexamethylene adipamide special fiber is prepared from the three above compositions by performing neutralization reaction, polymerization, spinning and other steps.

Description

technical field [0001] The invention relates to polyhexamethylene adipamide, in particular to a special high-viscosity and low-rheology polyhexamethylene adipamide fiber and a production method thereof. Background technique [0002] In general, polyamide (nylon) has excellent mechanical properties and durability, so it is widely used in fibers for industrial raw materials such as tire cords and fibers for carpets, and is also widely used in the manufacture of molded products. On the other hand, due to its excellent softness and dyeability, it is also widely used as a fiber for clothing, especially as a fiber for underwear. Polyhexamethylene adipamide (nylon 66) is a representative polyamide, and its use is also used as fibers for industrial raw materials, fibers for carpets, fibers for clothing and their molded products. However, in the current polyamide fiber manufacturing and spinning process, in order to obtain high-molecular-weight polymers, the polymer viscosity is oft...

AI Technical Summary

Problems solved by technology

If the relative viscosity is blindly reduced, the molecular weight of the polymer is reduced, and the obtained fiber strength and other indicators are very poor, which cannot meet the technical problems such as industrial use conditions.