Thermal insulation rainproof black-white film

Abstract

The invention belongs to the technical field of application of greenhouse covering film and particularly relates to thermal insulation rainproof black-white film, comprising a first M-LLDPE film layer, a second M-LLDPE (metallocene catalyzer linear low-density polyethylene) film layer, and a composite layer arranged between the first and second M-LLDPE film layers. The thermal insulation rainproof black-white film has the advantages that the multilayer composite structure of the film can reflect most of light effectively when the white faces up, can improve environment and weather conditions (inner temperature of a greenhouse is 5-10 DEG C lower than that of a greenhouse covered with other cloth or film) in the greenhouse, can shade sunlight and lower temperature, has good rainproof characteristic, has great tensile and insulation properties, can provide early maturing, increased yield and improved quality for crops, and has high tensile strength and smooth and attractive surface; when used in winter, the thermal insulation rainproof black-white film can absorb heat to thaw frost and snow thereon with the black facing up, and can, with the white facing in, block and reflect most of infrared therein to arrive at thermal insulation; the thermal insulation rainproof black-white film has high mechanical properties and excellent tolerance to low temperatures.

Description

technical field [0001] The invention belongs to the technical field of application of greenhouse covering films, and in particular relates to a heat-insulating, heat-preserving, and rain-proof black-and-white film, and a multilayer composite structure formed by the film. Background technique [0002] Greenhouse film is a special plastic film used for facility agricultural production and construction. Its light transmittance, heat preservation, tensile strength and aging resistance are superior to ordinary agricultural film. It is of great significance to the growth, production and income increase of greenhouse crops. . There are mainly four kinds of greenhouse films commonly used in my country: the first is polyvinyl chloride (PVC) greenhouse film, the second is polyethylene (PE) greenhouse film, the third is ethylene-vinyl acetate copolymer greenhouse film, and the fourth is polyvinyl chloride (PVC) greenhouse film. The second is light-adjustable agricultural film. In addit...

AI Technical Summary

Problems solved by technology

However, the unreasonable structural design of the black and white greenhouse film of the current traditional structure leads to poor performance in terms of wear resistance, UV protection, heat preservation, light transmission, rain resistance and tensile resistance, which results in the covered planting or cultivation. Slow production cycle, poor production status or reduced production of crops, etc., can no longer meet the use requirements of the existing greenhouse covering film

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