1. Introduction
In the paint industry, fluidity is a key indicator of paint quality and application performance. For products such as paints and varnishes, the measurement of outflow time plays an important role in controlling the construction effect and the quality of the coating film. GB/T6753.4 standard provides a method for measuring the outflow time of paints, which helps to ensure the consistency and performance of products. Outflow time is a key indicator of the fluidity of paints and related materials, especially for products such as paints and varnishes, which is directly related to the construction performance and surface quality of products. GB/T6753.4-1998 standard provides a measurement method for the outflow time of paints to ensure the consistency of products in construction and application.
2. Principles and main points
This method is suitable for coatings whose fluidity conforms to Newtonian flow. During the test, the sample is poured from the outFlow Cup, the outflow hole is loosened, and the time in seconds from the beginning of the sample flow to the initial interruption of the flow beam is recorded. Here are the key operating points:
OutFlow Cup selection: Select the appropriate label outFlow Cup according to the characteristics of the test material to ensure that the outflow time is between 20 seconds and 100 seconds.
Measurement of outflow time: Adjust the temperature of the sample and pour it into the outFlow Cup so that its horizontal level is at the same level as the upper edge of the outFlow Cup. Release the outflow hole and record the time.
Repeat test: Perform at least two tests and calculate the average. If the difference between the two tests exceeds 5% of the average, a third test is performed and an acceptable average is calculated based on the results of the three measurements.
3. Application and meaning
The measurement of outflow time is important for products such as coatings and varnishes:
Construction performance: The outflow time affects the fluidity of the paint during construction and the formation of the coating film. Proper outflow time helps to obtain a uniform coating film and avoid dripping and uneven coating.
Surface Quality: The outflow time is closely related to the smoothness and appearance quality of the coating film. Controlling the appropriate outflow time can help improve the surface finish and texture of the coating film.
Production control: During the coating production process, by accurately measuring the outflow time, the formula and process parameters can be adjusted to ensure product consistency.
4. Conclusion
The outFlow Cup method provided by the GB/T6753.4 standard is a method widely used in the paint industry to measure the outflow time of the paint, so as to ensure the construction performance and surface quality of the product. By reasonably controlling the outflow time, manufacturers can produce paint products with stable performance and high quality, and also help users get a better experience and effect during the construction process.
