Free technical materials available" Explanation of topics such as "the relationship between thixotropy, viscosity, and 'stringiness'!
In this article, we will discuss the liquid properties and cured properties of adhesives in the order of changes in their state. Liquid water changes its shape flexibly when force is applied. Water placed in a cup fills the interior shape of the cup without gaps due to gravity, and the top takes on a horizontal shape. Liquids for which the "applied force" and the "amount of deformation" are in a proportional relationship, like this water, are called Newtonian fluids. On the other hand, liquids like mayonnaise have different properties than water. Mayonnaise on a plate does not spread horizontally like water; instead, it mounds up and takes on a solid-like shape. Liquids that have the property of changing viscosity depending on the applied force, like this mayonnaise, are called thixotropic liquids. Generally, materials commonly used for adhesives are also thixotropic liquids. High thixotropic liquids behave like solids when little force is applied, and they change into a liquid like water when a large force is applied. Moreover, the higher the thixotropic nature of a liquid, the greater its ability to maintain shape. *For more detailed information, please refer to the related links. Feel free to contact us for further inquiries.*
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【[Liquid Properties] Viscosity - The Relationship Between Thixotropy, Viscosity, and "Stringiness"】 In relation to thixotropy, a problem that arises when considering adhesive recipes is "stringiness." In adhesive design, it is necessary to minimize this stringiness as much as possible. As a premise, liquids that are thin like water do not exhibit stringiness. Additionally, when thixotropy is imparted to a thin liquid like water, its stringiness improves. On the other hand, even with the same Newtonian liquid, a high-viscosity liquid like syrup will exhibit stringiness. When thixotropy is imparted to a liquid like syrup, it retains its shape in a stringy state, resulting in sharp edges similar to slime. The viscosity of the liquid and thixotropy are significant factors influencing stringiness, so they must be carefully considered during the adhesive design phase. In actual implementation of electronic components, when it is necessary to flow adhesive into very fine gaps, a low-thixotropy liquid is used. Conversely, when it is desired to keep the adhesive in place, a high-thixotropy liquid is employed. *For more detailed information, please refer to the related links. Feel free to contact us for further inquiries.*
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Dexerials Corporation has business offices and sales bases not only in Japan but also in Asia, including China, as well as in Europe and the United States. We continue to provide products with new value that meet customer needs tailored to each market. By adding new technologies to our existing products, we aim to maintain and strengthen our business. Moving forward, we will boldly challenge the automotive and life sciences sectors, steadily nurturing and expanding new businesses, while advancing the development of technologies that will pave the way for the future. As a company that creates new value that is not found anywhere else, we strive to maximize customer value and continue to challenge ourselves to become a trusted partner for our customers and society.
