What is rheology about?

What is rheology about?

At Sanyhot, we are committed with innovation, that’s why we invest an important part of our budget in R + D + i every year to equip our laboratories with the latest technology and train our team in the constant advances of the field.

"We are focused on the development of formulations for hot melt"

Our purpose is to combine efficiency, increasing quality and minimizing costs and environmental impact, to help our customers to understand and identify the materials that work best in their applications.

What is rheology about?

Rheology is an important tool to understand hot melt behavior.

Isaac Newton was the first to study viscosity and fluids. He explained in his book "Principia" published in the year 1687, that we could explain the viscosity as a coefficient, corresponding to the proportionality between the applied effort and the speed of deformation.

Some materials, such as hot melt adhesives, exhibit elastic and viscous properties and these behaviors change depending on temperature, time and rate or degree of deformation.

One of the best ways to study the rheological behavior of our hot melts is through dynamic oscillatory measurements. This technique involves oscillating, or twisting, the material at different frequencies and amplitudes and studying the resultant behavior. Use of this technique allows the user to observe changes in both viscosity and elasticity as a function of temperature or rate, without changing the structure of the adhesive.

Hot melts adhesives are applied in a molten state and must flow on the surfaces to ensure wetting and adhesion. By the measure of viscoelastic properties of a hot melt, you can obtain information such as bond strength, flexibility, tack and set time.

Rheological measurements can be very useful to understand the behavior of the adhesive for specific applications, resulting in the development of an improved hot melt and being able to predict its performance.

What is rheology about?

Our laboratory staff and our technical team can help you with your project, using tools such as the rheometer and offering solutions adapted to each of your needs.