SYNTHETIC RESIN FILM FOR AGRICULTURAL USE EXCELLENT IN ANTIFOG AND ANTIMIST PROPERTIES

摘要

A synthetic resin film for agriculture suited as a covering material for greenhouses or the like, which shows good anti-clouding and anti-fogging properties immediately after being spread and for longer period than 2 years. The synthetic resin film for agriculture is obtained by using (a) an ester of sorbitan with a higher fatty acid mainly containing 24 to 34 carbon atoms (montanic acid wax), an ester of glycerin with montanic acid wax and/or alkylene oxide adducts thereto and/or an ester of polyoxyalkylene with montanic acid wax as an anti-clouding agent, and (b) a fluorine-containing surfactant as an anti-fogging agent, kneading them with a film-forming resin such as vinyl chloride resin, polyethylene, ethylene/vinyl acetate copolymer, and forming it into a film. Incorporation of (c) an ester of sorbitan with higher fatty acid containing 12 to 22 carbon atoms, an ester of glycerin with higher fatty acid containing 12 to 22 carbon atoms or an alkylene oxide adduct thereto may further improve the anti-clouding property.