Author: Site Editor Publish Time: 2025-05-02 Origin: Site
As an important chemical raw material, EVA wax emulsion has been widely used in coatings, inks, adhesives and plastic modification. Its excellent performance and quality directly affect the final effect of the product. Therefore, scientific and systematic performance testing is essential. This article will introduce several common performance test methods of EVA wax emulsion and explore its application value. For wholesale, you can contact Excel EVA wax emulsion supplier via email 15098615635@163.com. For more details, visit the website https://www.longkouexcel.com.
The solid content of EVA wax emulsion is one of the key indicators for evaluating its quality. The test method is as follows:
Sampling: Put a certain amount of emulsion into a dry container and weigh it.
Drying: Heat in an oven at a constant temperature of 105℃ for 1 hour to ensure that the water is completely evaporated.
Calculation: Solid content = sample weight after drying / initial sample weight × 100%.
Solid content test can reflect the proportion of effective ingredients in EVA wax emulsion, which is of great significance for judging its concentration and application performance.
The particle size distribution of EVA wax emulsion directly affects its dispersibility and uniformity in application. Common test methods include:
Dynamic light scattering (DLS): Use light scattering technology to measure the average particle size and distribution range of emulsion particles.
Microscopic observation method: Directly observe the particle morphology and measure its size distribution through an electron microscope.
High-quality EVA wax emulsion usually has a uniform particle size distribution, which helps to improve its adhesion and smoothness in the substrate.
pH value is one of the basic chemical properties of EVA wax emulsion, which is crucial to its storage stability and adaptability to the application environment.
Test method: Use a pH meter to directly measure the pH value of the emulsion.
Generally speaking, the pH value of EVA wax emulsion should be kept between 7-9 to ensure the stability and environmental protection of the emulsion.
The thermal stability of EVA wax emulsion determines its applicability in high temperature environment.
Thermogravimetric analysis (TGA): Heat the sample to a specified temperature and record the curve of its weight change with temperature.
Differential scanning calorimetry (DSC): Analyze the changes in thermal properties of the emulsion at different temperatures, such as melting point and glass transition temperature.
The thermal stability test can be used to determine the performance of EVA wax emulsion in high-temperature application scenarios.
When EVA wax emulsion is used for coating or plastic modification, its mechanical properties directly affect the durability of the product. Common test methods include:
Hardness test: Evaluate the hardness of the coating to determine the reinforcing effect of the emulsion.
Tensile property test: Test the tensile strength and elongation at break of the emulsion-modified material to reflect its flexibility and strength.
Water resistance and chemical resistance are important performance indicators of EVA wax emulsion in the field of coatings and adhesives.
Water resistance test: Soak the sample coated with EVA wax emulsion in water to observe its water resistance time and performance changes.
Chemical resistance test: expose the sample to acid, alkali or organic solvent, and record its tolerance and performance changes.
These tests can effectively verify the stability of the emulsion in various complex environments.
The rheological properties of EVA wax emulsion determine its processing performance and coating effect.
Rheometer test: measure the viscosity, shear rate and thixotropy of the emulsion to evaluate its flow properties.
Excellent rheological properties can ensure the uniformity and ease of operation of the emulsion during coating and processing.
There are various methods for testing the performance of EVA wax emulsion, covering physical, chemical and mechanical properties. Comprehensive testing helps to ensure product quality and provide better solutions for end users. If you are looking for a reliable EVA wax emulsion supplier, please contact Excel through email 15098615635@163.com for more wholesale information, and visit our website https://www.longkouexcel.com for more product details.
