Five-layer-coextrusion, high-thermal-insulation, antifogging and drip-free agricultural greenhouse plastic film

Abstract

The invention discloses a five-layer-coextrusion, high-thermal-insulation, antifogging and drip-free agricultural greenhouse plastic film which comprises the following raw materials by weight percentage: agricultural polyethylene resin (including EVA (ethylene vinyl acetute) resin), a thermal insulation agent, an antifogging agent, an antidripping agent and an ageing resisting agent. According to the agricultural greenhouse film formed by five-layer coextrusion blow molding according to a layering formula, the thermal insulation property and the usage period of the film can be improved and prolonged; the raw materials are saved; antidripping and antifogging periods are prolonged; the property of the agricultural greenhouse film is improved; the yield and quality of overwintering greenhouse vegetables, fruit trees, flowers, and the like covered with the film can be increased and improved obviously; and the film has better popularization and application prospects.

Description

(1) Field of Invention [0001] The invention relates to a five-layer co-extruded plastic film for agricultural greenhouses with high thermal insulation and anti-fog and no dripping, which belongs to the field of production of plastic film products for agricultural greenhouses. (2) Technical background [0002] Although there are various types of specifications (width and thickness) of agricultural greenhouse plastic films currently produced and applied, they have the following shortcomings in production and application: First, the high cost of agricultural greenhouse films due to the high price of functional additives; film dripping Second, the contradiction between heat preservation and light transmission is prominent, that is, if the heat preservation agent is added for a long time, the light transmission will be poor, and the heat preservation agent with good light transmission and heat preservation performance is expensive, and the conventional dosage is large, so the cost...

AI Technical Summary

Problems solved by technology

[0002] Although there are many types of specifications (width and thickness) of agricultural greenhouse plastic films currently produced and applied, they have the following disadvantages in production and application: First, the cost of agricultural greenhouse films is high due to the high price of functional additives; Second, the contradiction between heat preservation and light transmission is prominent, that is, when the heat preservation agent is added for a long time, the light transmission will be poor, and the heat preservation agent with good light transmission and heat preservation performance is expensive, and the conventional dosage is large, so the cost needs to be reduced; The synergy between dripping and defogging is not good, that is, the film with good dripping is often not good at defogging, and the dripping performance with good defogging is poor

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