The difference between external anti fog agent and internal anti fog agent

There are significant differences between external anti fog agents and internal anti fog agents in terms of application methods, lasting effects, and applicable scenarios

1. Application method

External anti fog agent: directly applied to the surface of objects through spraying or immersion, with simple operation and low cost.

Internal anti fog agent: added to the polymer matrix, gradually reaches the surface of the object through migration, forming an anti fog layer.

2. Durability of the effect

External anti fog agent: The effect is immediate, but it is easy to disappear due to wiping or washing, usually with only short-term effectiveness.

Internal anti fog agent: has a long-term effect, even if the surface anti fog layer is lost due to wear or water washing, the internal anti fog agent can continue to migrate and replenish, maintaining the long-term anti fog effect.

3. Applicable scenarios

External anti fog agent: suitable for scenarios that require rapid anti fog, such as agricultural greenhouses, temporary emergency response, etc.

Internal anti fog agent: suitable for scenarios that require long-term anti fog, such as car glass, transparent packaging film, etc.

4. Advantages and disadvantages

External anti fog agent: The advantages are easy to use and low cost, but the disadvantage is poor durability.

Internal anti fog agent: The advantage is long-lasting anti fog, but the disadvantage is that the preparation process is complex and the cost is high.