Quantitative test method for components of additives in PA6 producing process

Abstract

The invention provides a quantitative test method for components of additives in a PA6 producing process. The quantitative test method comprises the following steps: preparing PA6 additive solution samples with different component contents; collecting spectral data of multiple groups of samples by a Fourier near infrared spectrometer, to obtain a near infrared spectrogram of each sample, and constituting a calibration sample set; correlating the component contents of each group of samples with the spectrogram; establishing a quantitative analysis model for a solution component test; after assessment results meet requirements, testing components of a solution to be tested by the Fourier infrared spectrometer, to obtain component data of the solution to be tested. The quantitative test method has the beneficial effects that: the detection accuracy is up to 0.01%, the blending quality of acid additives can be controlled, the blending error of each batch is controlled within + / -0.2%, the blending accuracy of the additives is increased, and the stabilities of the product quality index, the spinning property and the dyeing uniformity are improved.

Description

technical field [0001] The invention belongs to the technical field of nylon chemical fiber, and in particular relates to a method for quantitative testing of additive components in the production process of PA6. Background technique [0002] The PA6 additive preparation solution contains four components: caprolactam, PTA, SEED and desalinated water. Since there are the same groups in the molecular structures of caprolactam, PTA and SEED, at the same time H 2 The hydrogen bond of O also forms interference, so that the prepared additive solution cannot be detected by ordinary chemical quantitative methods. There is no detection method for acid additives in the same industry, and the blending effect and concentration cannot be measured and controlled. [0003] This requires a method that can detect additives well to ensure the blending effect and concentration. Contents of the invention [0004] The purpose of the present invention is to provide a quantitative testing meth...

AI Technical Summary

Problems solved by technology

[0002] The PA6 additive preparation solution contains four components: caprolactam, PTA, SEED and desalinated water. Since there are the same groups in the molecular structures of caprolactam, PTA and SEED, at the same time H 2 The hydrogen bond of O also interferes, so that the prepared additive solution cannot be detected by ordinary chemical quantitative methods

There is no detection method for acid additives in the same industry, and the blending effect and concentration cannot be measured and controlled

Images