What are the characteristics of vegetable greenhouse insulation?

When the temperature drops sharply in winter, many items need to be insulated. For example, the agricultural greenhouses that we often see around us are off-season vegetable planting greenhouses, breeding greenhouses, and various cement and concrete engineering buildings. When it comes to thermal insulation facilities, it is necessary to mention thermal insulation quilts. There are dozens of types of thermal insulation quilts and materials made of thermal insulation quilts. The materials used for thermal insulation quilts for different purposes are also different, such as greenhouse vegetables. The materials used for greenhouse insulation quilts are generally non-woven fabrics and sandwich cotton. The requirements of engineering thermal insulation quilts for cement concrete construction projects are mainly thermal insulation and scratch resistance. Therefore, the materials used in engineering thermal insulation must be Tarpaulin with strong scratch resistance is used as the surface material of the thermal insulation quilt. Most of the materials used for the insulation of vegetable greenhouses are porous and loose materials, which contain a lot of air, and many of the heat transfer forms include heat conduction, air convection and radiation heat transfer between pore surfaces. The actual heat transfer process is very complex and is usually simplified to the equivalent thermal conduction process. Its thermal insulation performance is still evaluated by thermal conductivity, which is called apparent thermal conductivity (or equivalent thermal conductivity, equivalent thermal conductivity). The smaller the apparent thermal conductivity, the better the thermal insulation. Vegetable greenhouse insulation quilt can be used in greenhouse insulation, greenhouse insulation, car insulation, door curtains, wall insulation, concrete insulation and other main purposes. The vegetable greenhouse insulation quilt is a high-speed and environmentally friendly production and manufacturing equipment. Because of its low-cost construction and easy-to-use thermal insulation, many agricultural producers use it in production. In order to avoid heating costs as much as possible and increase production. The thermal insulation properties are a comprehensive result of a variety of factors. In addition to effectively clarifying the structural dimensions of the greenhouse and its basic construction materials, it is also very important to select suitable insulation materials for vegetable greenhouses, plastic films, etc. What are the characteristics of vegetable greenhouse insulation? 1. Thermal insulation: The rainproof thermal insulation quilt has good thermal insulation performance, which can keep the plants in the greenhouse at a suitable temperature. 2. Heat resistance: The thermal insulation quilt of the rain-proof greenhouse has good heat resistance. When the temperature is below 110 °C, it will only cause the evaporation of water on the quilt and will not damage the fibers. Therefore, the rain-proof thermal insulation quilt is used at room temperature. There is no impact on the environment, thereby improving the environmental applicability of the rainproof and thermal insulation quilt. 3. Hygroscopicity: The rain-proof thermal insulation quilt has good hygroscopicity. Under normal circumstances, the fiber can absorb moisture into the surrounding atmosphere, and its moisture content is 8-10%. If the humidity of the cotton body increases, the surrounding temperature will increase. If it is higher, the water content in the fiber will all evaporate and dissipate, so that the body can maintain a water balance state. 4. Hygiene: Cotton fiber is a natural fiber, its main component is cellulose, and a small amount of waxy substances, nitrogenous substances and pectin. Cotton quilts have been inspected and practiced in many ways. When using the vegetable greenhouse insulation quilt, if the curling phenomenon occurs, it should be adjusted in time. If you need to save it, you should choose to dry it on a sunny day, seal it with a waterproof film, and strictly prohibit the sun and rain. If it is snowing or raining, the vegetable greenhouse insulation quilt needs to be dried in the sun before being rolled up the next day, and then rolled up. There are some differences in the use of vegetable greenhouse insulation, mainly depending on the crops grown in the greenhouse. Especially in winter, vegetable greenhouses need more insulation measures, and greenhouse insulation is one of the products. In addition to the use of heat preservation in agricultural vegetables, greenhouse insulation is actually widely used. The insulation of vegetable greenhouses is combined with the principle of anti-radiation heat insulation, and multi-layer reflective layers are added at reasonable positions. The reflective layer blocks the propagation path of thermal radiation, reflects the internal thermal radiation back, and also reflects the external low temperature radiation back, which greatly improves the thermal insulation performance, thereby effectively preventing pests and diseases. The greenhouse thermal insulation quilt fabric has the function of not being afraid of ultraviolet rays, which can effectively not be afraid of ultraviolet rays, and has a good anti-aging effect. The use of greenhouse insulation will not cause fungal crop infection. In the case of cloudy or rainy or snowy days, when the light intensity and light time are insufficient, artificial light sources such as electric lamps, gas lamps or biogas lamps can be used to supplement the illumination. It is not necessary to start using greenhouse insulation quilts in the beginning of winter. According to the weather conditions of the year, it can be advanced or delayed. As for when to use it, it still needs people's experience to judge.

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