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nature : short of plastic sheeting. Agriculture used plastic film. As temperature of the greenhouse or shed insulation covering materials. Than glass light, it also hail bash; Insulation is good, not readily available in the rice growing period and hypothermia Powdery snow dances by the invasion. Ahead of seedlings harvested early to avoid the losses caused by the typhoon. While prevent water evaporation, reduce wastage of water and fertilizer, labor saving irrigation and fertilizers to maintain a higher temperature for the growth of agricultural biotechnology to increase crop yields. Difficult to breathe, the smoke can be used as cover material, in order to avoid pests and diseases. Black film, so difficult to weed growth, significant savings can be weeding labor. Domestic Films must meet the following conditions : (a) good translucent, with no fog, dust, transparent; (2) thermal insulation is good; (3) durability, high-intensity, cold resistance, weatherability; (4) operable, and good high-frequency increases sticking to the public or good quality; (5) the price so cheap. Films are mainly agricultural PVC film, polyethylene film and ethylene-vinyl acetate copolymer film three. In addition, porous film, color film, dust and other films.
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