A kind of diatomite, kaolin thermal insulation film masterbatch and preparation method thereof

Abstract

The invention discloses diatomite and kaolin thermal-insulation film master batch and a preparation method thereof. The diatomite and kaolin thermal-insulation film master batch comprises the following components in percentage by mass: 22%-26% of diatomite, 30%-34% of kaolin, 32%-35% of polyethylene, 2%-3% of an aluminate coupling agent, 0.5%-0.8% of stearic acid, 0.3%-0.5% of calaium strarate, 2%-3% of paraffin, 1%-2% of PE (polyethylene) wax and 0.5%-0.8% of an antioxidant. The raw materials are mixed in a high-speed mixer in stages and then are extruded by a same-direction parallel twin-screw extruder to prepare the master batch. According to the diatomite and kaolin thermal-insulation film master batch and the preparation method thereof disclosed by the invention, the diatomite, the kaolin and the polyethylene are mixed and modified, the adding proportion of the diatomite to the kaolin is controlled to be 52%-60% to prepare master batch, the infrared-ray transmission rate of mulching film prepared by 5%-15% of the match batch can be reduced by 31%-34%, and the thermal insulation effects are obvious.

Description

technical field [0001] The invention relates to a composite material masterbatch and a preparation method thereof, in particular to a diatomite and kaolin polyethylene thermal insulation film masterbatch and a preparation method thereof. Background technique [0002] Since the late 1970s, plastic film mulching cultivation technology has been widely used. Traditional plastic film generally focuses on mechanical strength, impact resistance, aging resistance, and light transmission and temperature increase to meet the requirements and purposes of use. In recent years, with the strengthening of green, environmental protection and low-carbon awareness, more and more attention has been paid to the thermal insulation of plastic film. After the crops are covered with plastic film, the ground temperature will be raised by sunlight during the day, absorbing heat and avoiding heat dissipation and cooling caused by air flow and convection, so that the ground temperature can be raised by...

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Problems solved by technology

[0003] The Chinese patent application with the application number 2013102374334 discloses a nanometer self-assembled heat-insulating agricultural film. In this application, indium-doped tin oxide and anthium-doped tin oxide are used to achieve the effect of blocking infrared rays, but the process is complicated and the cost is high; application number The Chinese patent application 2010800375252 discloses a kind of "hydrotalcite-type particle powder, thermal insulation agent for agricultural film, masterbatch for agricultural film and agricultural film". Hydrotalcite particles are then coated with high-grade fatty acids to make insulating agent particles, and then added to polyethylene resin to make powder masterbatch to produce agricultural mulch film. Hydrotalcite needs special treatment, and the masterbatch production process is complicated.

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