Multi-Layer Film and Articles Made Therefrom

摘要

A polyethylene-based multi-layer film, which is particularly useful as a greenhouse film, is provided. The multi-layer film contains an ethylene/α-olefin interpolymer composition having a Comonomer Distribution Constant (CDC) in the range of from 75 to 200, a vinyl unsaturation of less than 0.15 vinyls per one thousand carbon atoms present in the backbone of the ethylene-based polymer composition; a zero shear viscosity ratio (ZSVR) in the range from 2 to 20; a density in the range of from 0.903 to 0.950 g/cm3, a melt index (I2) in a range of from 0.1 to 5 g/10 minutes, a molecular weight distribution (Mw/Mn) in the range of from 1.8 to 3.5.

主权项

1. A multi-layer film comprising:
a first layer derived from a polymer blend comprising from 50 to 90 wt % of a low density polyethylene having a density from 0.910 to 0.93 g/cc and an I2 from 0.1 to 10 g/10 min and from 10 wt % to 50 wt % linear low density polyethylene having a density from 0.910 to 0.93 g/cc and an I2 from 0.5 to 10 g/10, each based on the total polymer weight in the first layer; a second layer derived from a polymer blend comprising from 25 to 50 wt % of a low density polyethylene having a density from 0.910 to 0.93 g/cc and an I2 from 0.1 to 10 g/10 and from 30 to % to 58 wt % linear low density polyethylene having a density from 0.910 to 0.93 g/cc and an I2 from 0.5 to 10 g/10 and from 5 to 35 wt % of an ethylene/α-olefin interpolymer composition having a Comonomer Distribution Constant (CDC) in the range of from 75 to 200, a vinyl unsaturation of less than 0.15 vinyls per one thousand carbon atoms present in the backbone of the ethylene-based polymer composition; a zero shear viscosity ratio (ZSVR) in the range from 2 to 20; a density in the range of from 0.903 to 0.950 g/cm3, a melt index (I2) in a range of from 0.1 to 5 g/10 minutes, a molecular weight distribution (Mw/Mn) in the range of from 1.8 to 3.5, each based on the total polymer weight in the second layer; and a third layer derived from a polymer blend comprising from 50 to 90 wt % of a low density polyethylene and from 10 wt % to 50 wt % linear low density polyethylene, each based on the total polymer weight of the third layer; wherein the second layer is disposed between the first and third layers and wherein independently each of the first, second and third layers optionally comprises from 5 to 10 wt % one or more additives based upon the total weight of each layer.