For agricultural film applications, Polytechs offers the IR67 master-batch which allows heat that has been accumulated in the daytime to be maintained throughout the night, through a process of blocking the heat radiation reflected by the ground.
The solution used allows any transmission of the spectre of visible light to be maintained on the film.
The absence of ferric flaws, unlike Kaolin, allows it to maintain good properties as the film ages.
IR67 also acts as an Anti-block agent.
Refer to the Technical Data Sheet: IR67