Antifogging agent is to prevent the transparent plastic film, sheet or plate, in the humid environment, which showed a layer of fine water droplets, a kind of additives to make its surface fuzzy atomization phenomenon. When the membrane material, plate, sheet, fog, light through the obstacle, such as plastic, it will because of fog and greatly weaken the intensity of illumination, affect the growth of plants.
  1.Mechanism of action of anti fogging agent. In order to prevent fogging phenomenon, need to join the anti fog agent in plastics, which is a surface active agent dear water, on the plastic surface orientation, dear water-based outward, so that the water is easy to damp the plastic surface, fine water droplets condensed quickly spread into a very thin layer or large droplets along the film flow, such you can avoid atomization droplets to scattering and the formation of.
  2.Category anti fog agent. According to the anti fogging agent into plastic way, anti fog agent can be divided into inner and outer coating type two. With anti fog agent, this kind of anti fogging agent is anti fog agent as an additive, to join in the ingredients, melting, molding products. It is characterized by sustained performance, is not easy to loss, but for high crystallinity polymer, it is difficult to have good Antifog effect; spraying type antifogging agent, this kind of anti fogging agent is coated on the surface of the products obtained antifogging effect. When in use, the antifogging agent soluble in organic solvents or water, and then coated with deputy to the plastic surface. It is characterized by the use of simple, low cost, but easily washed away or erased, poor durability.
  3.The use of anti fog agent, anti fog agent and anti fogging performance is not comprehensive, has the initial anti fog, low temperature, high temperature, anti fog fog lasting antifogging four, in actual use, a kind of anti fogging agent is difficult to have four effects, therefore, are often based on product requirements the anti fog effect, choose to focus with the use of. The main composition of antifogging agent is partially esterified fatty acids and polyhydric alcohols, polyols used is the glycerol, sorbitol and anhydride; fatty acids are C11, C12 unsaturated acid, general medium chain fatty acid ester early good antifogging effect, long chain fatty acid ester lasting antifogging effect well, the antifogging agent is composed of various acid mixed esters.