Quantitative test method for components of additives in PA6 producing process

A technology of production process and testing method, applied in the field of nylon chemical fiber, can solve the problems such as the inability to measure and control the blending effect and concentration, the inability of the additive solution to pass, and the detection, etc., to achieve low cost, good reproducibility and fast analysis speed. Effect

Inactive Publication Date: 2013-10-23
TIANJIN CHANGLU HAIJING GRP CO LTD
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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 a...

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  • Quantitative test method for components of additives in PA6 producing process

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Embodiment Construction

[0018] The present invention will be further described below according to specific embodiments.

[0019] Near-infrared light refers to electromagnetic waves with wavelengths in the range of 780-2500nm, which is the earliest non-visible light region known to people. Modern near-infrared spectroscopy is the fastest-growing and most eye-catching spectroscopic analysis technique since the 1990s. It is an organic combination of spectroscopic measurement technology and chemometrics, and is known as the giant of analysis. Near-infrared spectroscopy analysis technology includes qualitative analysis and quantitative analysis. The purpose of qualitative analysis is to determine the composition and structure of substances, while quantitative analysis is to determine the content of certain components in substances or the value of quality attributes of substances. Different from the commonly used chemical analysis methods, near-infrared spectroscopy is an indirect analysis technique, which...

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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...

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Application Information

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IPC IPC(8): G01N21/35
Inventor 韩辉李萌赵红陈向峰郭鹏杰李兵李慧良刘明月
Owner TIANJIN CHANGLU HAIJING GRP CO LTD
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