What kind of covering material is used in the greenhouse?

The thermal insulation covering materials of solar greenhouse can be divided into two categories: one is the external thermal insulation covering materials, including grass (curtain), paper quilt, quilt, etc., which are mainly used for the external covering of greenhouse; The other kind is internal hanging insulation covering materials, including agricultural non-woven fabrics (also known as non-woven fabrics or harvesting cloths) and plastic films, which are mainly used for hanging insulation curtains (also known as hot curtains or secondary curtains) or adding small and medium-sized arches in greenhouses. The requirements of external thermal insulation materials in solar greenhouse are high thermal insulation, non-heat absorption, light weight, durability and low cost; The requirements of internal thermal insulation covering materials are high thermal insulation, fog drop prevention, light weight, durability, easy folding and reasonable price. At present, both external insulation covering materials and internal hanging materials need to be replaced by new industrialized products, which need to be developed by relevant departments.