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近些年来,我国农用塑料薄膜制造业发展迅速。目前,我国农膜产量和覆盖面均居世界首位,但其质量与发达国家相比还有很大差距。专家指出,目前发达国家早已淘汰了普通棚膜,而我国普通棚膜产量仍占棚膜总量的81.8%,先进的耐老化和耐候功能仅占18.2%。且棚膜的质量较差。如生产的防雾滴农膜有效期只有2-4个月,最多不超过8个月,还存在着防滴不防雾的问题,致使作物易受病虫的侵害。发达国家生产的防雾滴膜有效期基本上与防老化寿命相同,且防滴又防雾,同样,保温型棚膜国外分为有机保温剂膜和无机保温剂膜,前者适用于越
In recent years, China’s agricultural plastic film manufacturing industry has developed rapidly. At present, China’s agricultural film production and coverage rank first in the world, but its quality is still far behind that of developed countries. Experts pointed out that at present, developed countries have already eliminated ordinary shed films, and China’s ordinary shed film production still accounts for 81.8% of the total shed film, and the advanced aging and weathering functions only account for 18.2%. And the quality of the film is poor. Such as the production of anti-fog drop agricultural film is only valid for 2-4 months, up to no more than 8 months, there is also the problem of anti-drip and anti-fog, resulting in crops vulnerable to pests and diseases. The effective period of the anti-fog dripping film produced in developed countries is basically the same as the anti-aging life, and anti-drip and anti-fog. Similarly, the heat-insulating shed film is divided into organic heat-insulating agent film and inorganic heat-insulating agent film. The former is applicable to the more.