Properties and applications of plastic multi-span greenhouses

Properties and applications of plastic multi-span greenhouses.

The performance of plastic multi-span greenhouse:

The plastic multi-span greenhouse has the characteristics of light transmission, heat preservation and prevention of water evaporation. Its performance is closely related to the quality and performance of the covering material. Common agricultural films include polyvinyl chloride (PVC) agricultural film, polyethylene film (PE), Support material for ethylene vinyl acetate copolymer (EVA). Among them, PVC film has good thermal insulation, EVA agricultural film has strong light transmission and moisture retention, and PE agricultural film has poor thermal insulation. The service life of ordinary agricultural film is 4 to 6 months, and the service life of aging resistance (weather resistance, longevity film) is 1 to 2 years.

Application of plastic multi-span greenhouse:

Multi-span greenhouse

The greenhouse has large span, large capacity, strong high temperature and low temperature buffer capacity, various forms of internal thermal insulation cover, and improves cold protection and thermal insulation performance. 40d, and it can be delayed 25~30d in autumn.

Plastic greenhouses are mainly used for early-maturing and delayed cultivation of vegetables. In early spring, a kind of early-maturing and cold-resistant leafy vegetables, such as rapeseed, cabbage, radish, etc., can be planted, harvested in 40-50 days, and supplied to the market in March-April. In the south, tunnels are also used to raise seedlings and vegetable species.

Plastic multi-span greenhouses should choose anti-aging dripping film, or EVA composite functional greenhouse film with high light transmittance and high thermal insulation.