Multilayer film for agricultural greenhouse

Abstract

The invention provides a multilayer film for an agricultural greenhouse. The multilayer film is characterized by comprising a substrate film, wherein an antifogging coating film layer is arranged on the inner side surface of the substrate film, the substrate film has an inner layer, a middle layer and an outer layer, the middle layer of the substrate film is a meshed reinforcing layer, meshes of the meshed reinforcing layer are hexagonal, the area of each mesh is greater than or equal to 5 square centimeters and smaller than or equal to 10 square centimeters, the inner layer of the substrate film is a PET-polyester plastic film, and the outer layer of the substrate film is a nylon-plastic film and contains a fluoride series surfactant ingredient. Due to the structure, the multilayer film for the agricultural greenhouse has the advantages that the tensile strength can be effectively improved, the internal surface is not prone to water droplet generation, and the lowering of light transmittance of the external surface caused by water scales resulting from long-term rainwater and raining is difficult.

Description

technical field [0001] The invention relates to a multilayer film, in particular to a multilayer film for agricultural greenhouses. Background technique [0002] Plastic film is widely used in the field of plastic greenhouses in the rural planting industry. The use of plastic greenhouses for the cultivation of vegetables and flowers has played a special and important role in alleviating the contradiction between supply and demand in the off-season of vegetables. It has significant social benefits and huge practical benefits. economic benefits. The existing films for plastic greenhouses have the following disadvantages: 1. When the thickness of the film is reduced, its light transmittance will be improved, but the tensile strength will decrease accordingly; 2. The water vapor in the greenhouse is easy to condense on the inner surface of the film, eventually forming Small water droplets, small water droplets will affect the light transmission performance of the film. In addit...

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Problems solved by technology

The existing films for plastic greenhouses have the following disadvantages: 1. When the thickness of the film is reduced, its light transmittance will be improved, but the tensile strength will decrease accordingly; 2. The water vapor in the greenhouse is easy to condense on the inner surface of the film, eventually forming Small water droplets, small water droplets will affect the light transmission performance of the film. In addition, small water droplets will fall directly on the seedlings after reaching a certain volume, which may cause rotten seedlings; 3. The film is located on the outer surface of the greenhouse. It is easy to accumulate on the top, causing pressure damage to the film, and scale will be generated after a long time, which will affect the light transmittance

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