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The Importance of Evaporation Loss Meter in the Coatings and Ink Industry
Date: 2025-07-09Read: 0
The evaporation loss meter quantitatively detects the evaporation rate and total amount of volatile components (such as solvents and diluents) by simulating the evaporation behavior of coatings or inks during storage, application, and curing processes. The core principles include:
1. Weight method: Monitor the mass loss of the sample caused by volatilization through continuous weighing.
2. Infrared or spectroscopic analysis: detecting changes in the composition and concentration of volatile gases.
3. Environmental simulation: Control temperature, humidity, airflow and other conditions to simulate actual usage scenarios (such as high-temperature drying and outdoor storage).
The core role of evaporation loss meter in the coatings and ink industry:
1. Quality control and stability assessment
Solvent evaporation control: The drying speed, viscosity stability, and final performance (such as glossiness and hardness) of coatings and inks are closely related to the solvent evaporation rate. The loss meter can accurately measure the volatilization characteristics of different formulas, ensuring the stability of the product during storage and construction.
Batch consistency testing: By comparing the evaporation rates of different batches of products, quickly identify formula or process fluctuations, and avoid coating defects (such as shrinkage and cracking) caused by differences in solvent evaporation.
2. Formula optimization and performance improvement
Solvent system design: By testing the volatilization rate of different solvent combinations, optimizing the "volatilization gradient" design (such as fast drying and slow drying solvent combinations), achieving a more uniform drying process and reducing surface defects.
Development of low VOC formulas: Under the promotion of environmental policies, evaporation loss meters can help evaluate the volatilization behavior of water-based, high solid content, or solvent-free systems, ensuring the construction adaptability and performance standards of low VOC formulas.
3. Construction performance prediction
Simulate actual working conditions: By setting different environmental conditions (such as high temperature, high humidity, and strong ventilation), predict the drying time, leveling, and coating uniformity of the coating in practical applications, and avoid construction problems (such as sagging and orange peel phenomenon).
Coating process optimization: For example, in spray coating, roll coating, or dip coating processes, adjusting construction parameters (such as viscosity and flash evaporation time) based on evaporation rate can improve efficiency and reduce waste rate.
4. Environmental compliance and safety
VOC emission control: Accurately measuring the amount of solvent volatilization, helping enterprises meet national or regional environmental regulations (such as the EU VOC Directive and China's Air Pollution Prevention and Control Law), and reducing carbon emissions in the production process.
Safety hazard warning: By detecting the evaporation rate of volatile components, assess the risk of explosion during storage and transportation (such as high solvent vapor concentration), and guide safe operating procedures.
