Overview
A permeation cup is an experimental tool used for measurement of the permeation performance of materials, usually consisting of a transparent cup-shaped container and permeation holes at the bottom. It is commonly used for measurement of the permeation capacity of liquids, gases or Miscellaneous solutes in materials to evaluate the permeability, breathability or filtrate performance of materials. For example, it can be used in the field of building materials for measurement of water permeability performance of concrete, bricks and other materials, and in the field of agriculture for measurement of water permeability of soils.
Features
1. Suitable for self-supporting coatings and non-self-supporting coatings
2. Support wet cup method and cheering method test
3. Self-supporting coatings can be tested directly without baseplate
4. Non-self-supporting layers need to be tested with the help of permeability materials
5. The test area is 30cm ²
Principle
When using a permeation cup, the material to be tested is placed in the cup and injected with a certain pressure or immersion liquid. Over time, the permeation of the liquid is observed, and the permeation performance of the material is evaluated by measuring the change of the permeation rate or liquid level of the liquid. The water vapor pass rate to the film is determined by reducing or increasing the weight of the contents of the cup within a specific time. The same method can be used to measure the film's permeability to various Miscellaneous substrates in a gaseous state.
Applications
Building materials, agriculture, paints, varnishes, coatings, films, coating systems
Standards
GB/T 17146、JG/T 309、JG/T 485、ISO 7783、ASTM D 1653
Steps
1. Put the material to be tested into the permeation cup
2. Inject a certain pressure or soak the liquid
3. Observe the permeability of the liquid
4. measurement of liquid penetration rate or liquid level change
5. Measurement of permeability by weight change
Notice
• Self-supporting coatings can be tested directly without baseplate
• Non-self-supporting layers need to be tested with the help of permeability materials
• When concerned about moisture permeability in a high humidity environment, the wet cup method is the main method
• Cheers can be used in different programs or environments
