Greenhouse: With polymer - polyvinyl chloride, polyethylene production, plastic films are widely used in agriculture. Japan and the United States and Europe to be successful in the early 1950s, a hotbed of mulch application, and subsequently covering the shed and greenhouse can also get good results. Introduced in the autumn of 1955, agricultural film, PVC double membrane steel shed factory, the first in Beijing to cover the vegetable shed, get precocious yield results. Features greenhouses: the lighting conditions. Generally the film is also easily adsorb water vapor double membrane steel shed, condensed into water droplets double membrane steel shed construction companies in the film, so that the light transmittance of 10-30% reduction in the film. Therefore, to prevent contamination of the film, to prevent the agglomeration of water droplets is an important measure. Moreover the film during use double membrane steel shed manufacturers, due to the high temperature, low temperature, and the influence of ultraviolet sunlight, the film "aging." After aging film transmittance rate decreased by 20-40%, and even loss of use value. So the film greenhouses covering should be used in anti-aging temperature, dust and drip-free membrane to enhance shed the light, warming and extended use period. Double membrane steel shed building, Communications Technology, Yinchuan double membrane steel shed by Anyang City Communications Technology Limited. Anyang City Communications Technology Co., Ltd. (www.aytlkj.com) is Anyang, a leader in agricultural supplies, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Communications technology leadership in the staff warmly welcome all inquiries negotiations to create a better future for Communications Technology.