1. Wind coefficient: the wind speed during spraying shall be less than 5m / s. Because the wind speed exceeds 5m /s, the heat generated by the reaction will be blown away, which will affect the rapid foaming reaction of the polyurethane foam and make the surface of the product fragile. At the same time, because the spraying foaming opportunity mixes the raw materials, the spraying is in the atomization state. If the wind speed is too high, the atomized particles will be blown away, which increases the loss of raw materials and pollutes the environment.

　　2. Temperature factor: during spraying, the on-site ambient temperature and surface temperature of the sprayed substrate shall be between 15 ℃ and 35 ℃. When the temperature is too low, the adhesion between polyurethane foam and matrix decreases, and the density of rigid foam products is increased obviously. If the temperature is too high, the loss of foaming agent is too large and uneconomical.

　　Pu insulated steel pipe at production site

　　3. Substrate surface factor: polyurethane rigid foam is a polymer product produced by the mixed reaction of isocyanate and polyether. Among them, isocyanate is easy to react with water to form urea. Therefore, the surface of spraying base material is required to be clean and dry without rust, dust, pollution and moisture. If there is dew or frost, it should be removed and dried.

　　The polyurethane foam insulation pipe can not be reversed in some cases during construction. The installation of polyurethane foam insulation pipe should use the correct method. When there is a small wrong language that can not function enough for him, such an excess pipe insulation technology, he analyzes the future development trend, and has a great impact on the domestic economy.

　　The above is the relevant content introduced by the polyurethane insulated steel pipe manufacturer. For more information, please visit the website: https://www.sdhpgy.com