Polyethylene greenhouse film resin composition and preparation method thereof

Abstract

The invention discloses a polyethylene greenhouse film resin composition, which is calculated by linear low density polyethylene in weight percent, and comprises the following components: 1) linear low density polyethylene the melt flow rate of which is 0.7-3.0g / 10min; 2) 5-15% of low-pressure polyethylene the melt flow rate of which is 0.01-0.1g / 10min; 3) 0.1-0.5% of tert-butyl hydroperoxide; and 4) 0.03-0.07% of dicumyl peroxide. The composition can stably blow a wide greenhouse film on a common film blowing unit which is not transformed, wherein, the thickness of the wide greenhouse film is more than or equal to 80 mu m, and the width of the wide greenhouse film is more than or equal to 8m; the product has no crystallization point on the appearance, has high tearing strength, and can resist 7-8 grade sand wind, wherein, the wind power is 17.2-20.7m / s, and is especially suitable for the laying of the central and western regions in which the sandstorm occurs frequently. The invention also further discloses a preparation method of the composition.

Description

Technical field [0001] The invention relates to a polyethylene shed film resin composition and a preparation method thereof, in particular to a micro-crosslinked modified polyethylene shed film resin composition and a preparation method thereof. Background technique [0002] my country is a big agricultural country, and the production of agricultural film occupies a pivotal position in my country's plastic industry. Agricultural film is mainly divided into two types according to function: mulch film and greenhouse film. In recent years, agricultural greenhouses in my country have been widely used, and the demand for high-performance resin for greenhouse film is very urgent. At present, my country is the country with the largest production and consumption of agricultural greenhouse film, and its consumption is about 1.6 times that of all other countries combined. According to incomplete statistics, my country already has nearly a thousand agricultural film production enterpr...

AI Technical Summary

Problems solved by technology

However, the physical and mechanical strength of the shed film produced by LDPE / LLDPE blends is relatively low, especially the transverse tear strength is small, and it is prone to bursting when laid under the harsh conditions of frequent sandstorms in western China

In addition, the different blending ratios make the quality of the greenhouse film uneven

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