The invention discloses a nano
fog-dissipation multifunctional
greenhouse agricultural film, and in particular relates to a three-layer co-extruded EVA (
ethylene-
vinyl acetate copolymer) long-life
fog-dissipation environment-friendly multifunctional
greenhouse film, belonging to the field of agricultural mulching films. The
raw material formula of an outer layer comprises the following components in percentage by weight: 20-50% of linear low-density
polyethylene (LLDPE), 20-50% of low-density
polyethylene (LDPE), 10-20% of
metallocene polyethylene (mPE) and 5-10% of double-prevention
masterbatch; the
raw material formula of a middle layer comprises the following components in percentage by weight: 30-40% of
ethylene-
vinyl acetate copolymer (EVA), 20-40% of linear low-density polyethylene (LLDPE), 20-40% of low-density polyethylene (LDPE) and 5-10% of three-prevention
masterbatch; the
raw material formula of an inner layer comprises the following components in percentage by weight: 30-40% of
ethylene-
vinyl acetate copolymer (EVA), 10-20% of linear low-density polyethylene (LLDPE), 20-50% of low-density polyethylene (LDPE) and 5-10% of three-prevention
masterbatch; and the formulas of the outer layer, the middle layer and the inner layer are uniformly mixed respectively, master batches are prepared by using a double-head thread screw double-screw extruding
machine, a three-layer film is formed through a co-
extrusion die head and is extruded out to prepare the multifunctional agricultural
greenhouse film. Every quality technical index of the film reaches or exceeds a
national standard, and a small part of the indexes is more than 2 times better than the
national standard, so that the film is excellent in antiaging performance and cannot generate
fog drops, and the service life of the film reaches more than 3 years.