Method for rapidly determining ink stability

A rapid determination and stability technology, applied in measurement devices, scattering characteristics measurement, instruments, etc., can solve the problems of prolonging the ink development cycle, difficult to characterize and detect the evolution process of multiple dispersion systems, unable to observe the actual shape of the sample, etc. The effect of shortening the development cycle

Active Publication Date: 2020-04-21
苏州雄鹰笔墨新材料有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This test method not only greatly prolongs the cycle of ink research and development, but the content of the test is mainly writing data, which cannot well reflect the changes in the internal structure and properties of the ink.
Therefore, whether it is possible to find a convenient and quick emulsified ink test method with the help of advanced analytical testers is also an important part of research and development.
[0003] Emulsified ink has the characteristics of deep color and many components, so it is difficult to characterize and detect the evolution process of its multiple dispersion system under different conditions by using conventional optical microscopes and other intuitive means
Electron microscopy and other methods need to dilute the sample preparation, and the dilution of the emulsified ink sample will lead to the reorganization of the emulsified system, and the actual shape of the sample cannot be observed

Method used

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  • Method for rapidly determining ink stability
  • Method for rapidly determining ink stability
  • Method for rapidly determining ink stability

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Example 1: High temperature storage time and stability parameters

[0061] The samples were placed in a 50°C electrothermal constant temperature incubator for different times, and their stability parameters were measured after returning to room temperature. The result is as Figure 8 shown. The results from the figure show that the change of ink can be significantly accelerated under high temperature storage at 50 °C. After about 29 days of high temperature storage, the stability parameters of the emulsified ink increased sharply, indicating that the stability of the emulsified ink has changed. Therefore, if the storage time at 50°C is set to more than 30 days, and the ink stability parameter has not changed, it indicates that it is still in a stable state, and the internal dispersed phase has no obvious change.

Embodiment 2

[0062] Example 2: Low temperature treatment and stability parameters

[0063] The samples were stored at -5°C for different times, and their stability parameters were determined after returning to room temperature. The result is as Figure 9 shown. It can be seen from the figure that after the emulsified ink is stored at -5℃ for different times, its stability parameters increase continuously with the extension of time, and show a relatively stable state within 6 days. After more than 6 days, the stability parameters increase sharply, indicating that the stability is greatly reduced. . Therefore, setting a storage time of 7 days can be used for the judgment of its long-term stability.

Embodiment 3

[0064] Example 3: Alternating Temperature Treatment and Stability Parameters

[0065] The samples were stored cyclically at -5°C and 50°C for 24h each time, that is, after being stored at -5°C for 24h, stored at room temperature for 24h, and then placed in a 50°C incubator for 24h, followed by cycles for several times and recovery. The stability parameters were determined after room temperature. The result is as Figure 10 shown. It can be seen from the figure that the high and low temperature alternating storage experiments have obvious effects on the stability. The emulsified ink shows good stability after one alternating storage, but its stability decreases significantly after two alternating treatments. After 3 times of alternating treatment, the stability decreased more obviously. Therefore, 3 times of alternating high and low temperature is set as the standard for stability evaluation.

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Abstract

The invention discloses a method for rapidly determining ink stability. According to the method, four accelerated aging technical standards are established; a low-field nuclear magnetic analysis method and a multiple light scattering method are applied to the stability research of emulsified ink for the first time; through the quantitative test data, not only can the stability state of the ink beknown, but further the internal structure features of the ink can be better revealed, the research and development period of the emulsified ink is shortened, and powerful technical support is providedfor research and development and production of the emulsified ink.

Description

technical field [0001] The invention relates to a method for rapidly measuring ink stability, belonging to the technical field of ink testing. Background technique [0002] Emulsion ink is increasingly recognized by the market because of its green environmental protection and superior writing performance. In the production process of emulsified ink, a certain amount of water is used to replace the organic solvent, which is a thermodynamically unstable system, and problems such as agglomeration and viscosity increase will occur during storage. The common method in the pen making industry is to store the product for 18 months and test its performance through writing indicators. This test method not only greatly prolongs the cycle of ink research and development, but also the content of the test is mainly writing data, which cannot well reflect the changes in the internal structure and properties of the ink. Therefore, it is also an important link in the research and developm...

Claims

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Application Information

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IPC IPC(8): G01N24/08G01N21/49
CPCG01N24/08G01N21/49G01N2021/4709Y02A90/30
Inventor 章建东朱健张胜红
Owner 苏州雄鹰笔墨新材料有限公司
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