Agricultural porous laminated film with excellent high temperature reduction effect

Abstract

Provided is an agricultural porous laminated film, which shows excellent air permeability, waterproof properties, rigidity, and durability, and effectively suppresses heat and light in crop cultivation and packaging by an evaporation heat absorption mechanism by soil moisture evaporation, thereby lowering a withering rate and improving growth and development of crops.

Claims

An agricultural porous laminated film comprising:a porous polyolefin substrate layer and a non-woven fabric layer laminated on one or both surfaces of the substrate layer,wherein the porous polyolefin substrate layer is produced by including, with respect to 100 parts by weight of (a) a linear low-density polyethylene resin having a density of 0.910 to 0.925 g / cm³,10 to 40 parts by weight of (b) a linear low-density polyethylene resin having a density of 0.930 to 0.940 g / cm³,10 to 40 parts by weight of (c) a low-density polyethylene resin having a melt index (190˚C, 2.16 kg) in accordance with ASTM D1238 of 5 to 10 g / 10 min,80 to 200 parts by weight of (d) calcium carbonate having an average particle diameter of 1 to 5 μm and a maximum particle diameter of 10 μm or less, surface-coated with a C9 to C24 saturated fatty acid,and 3 to 10 parts by weight of (e) titanium dioxide.A method of producing an agricultural porous laminated film, the method comprising:(a) mixing 10 to 40 parts by weight of a linear low-density polyethylene resin having a density of 0.930 to 0.940 g / cm³, 10 to 40 parts by weight of a low-density polyethylene resin having a melt index (190˚C, 2.16 kg) in accordance with ASTM D1238 of 5 to 10 g / 10 min, 80 to 200 parts by weight of calcium carbonate having an average particle diameter of 1 to 5 μm and a maximum particle diameter of 10 μm or less, surface-coated with a C9 to C24 saturated fatty acid, 3 to 10 parts by weight of titanium dioxide, 0.1 to 10 parts by weight of a metal stearate, 1 to 10 parts by weight of a UV protection agent, and 0.1 to 10 parts by weight of an antioxidant, with respect to 100 parts by weight of a linear low-density polyethylene resin having a density of 0.910 to 0.925 g / cm³, and melt-extruding the mixture to prepare a compound composition for a porous polyolefin substrate; (b) extrusion molding the compound composition for a porous polyolefin substrate into a porous polyolefin sheet; and (c) laminating a non-woven fabric on one or both surfaces of the porous polyolefin sheet and pressing the laminate to produce a porous laminate film.

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