A method for preparing multi-wall weather-resistant plant fiber reinforced air duct

Abstract

The invention provides a method for preparing a multi-wall weather-resistant plant fiber reinforced air duct. The method comprises: mixing and emulsifying different proportions of modified plant fibers and phenolic foaming materials to obtain surface and core fiber foaming materials, Layer-by-layer paving to obtain a plant fiber reinforced foam insulation layer; then pave the outer isolation layer, plant fiber reinforced foam insulation layer, moisture-proof layer, and sealing layer in sequence, and spray a coupling agent between layers during paving, Vinyl resin is then brushed, and then fiber-based plasticized adhesive is paved on the next layer, and finally a multi-wall weather-resistant plant fiber reinforced air duct is obtained; an additional insulation layer is added between the outer isolation layer and the plant fiber reinforced foam insulation layer. The mute buffer layer increases the mute performance; or a phase change layer is added between the plant fiber reinforced foam insulation layer and the moisture-proof layer to increase the energy-saving performance. The multi-wall weather-resistant plant fiber reinforced air duct prepared by the invention has good thermal insulation performance, light weight, good flame retardancy and good breakage resistance.

Description

technical field

[0001] The invention belongs to the technical field of air ducts, and in particular relates to a preparation method of multi-wall weather-resistant plant fiber reinforced air ducts. Background technique

[0002] At present, the air ducts used in high-rise buildings mainly include: galvanized thin steel air ducts, glass fiber reinforced plastic air ducts and composite thermal insulation air ducts. These three types of air ducts have different characteristics during use. Among them, the galvanized thin steel air duct has high mechanical strength and low cost, but the metal material has high density, high quality, and poor sound insulation effect. It needs to install a muffler. At the same time, the metal material has poor corrosion resistance, is easy to rust, and the construction process is relatively complicated. It has gradually been adopted. disuse. FRP air ducts are prefabricated by hand, connected by flanges, have high fire resistance and corrosion resis...