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The two-component spunbond technology has been greatly developed. It is a non-woven fabric production technology that combines the fiber-forming technology of composite spinning with the web forming and fabric forming technology of the spunbonding method. The biggest advantage is that different raw materials can be used to produce different properties through different composite forms. After the heat treatment of Eleves, the PE/PET core-core composite product of Unijika, Japan, the polyethylene on the surface melts into a binder and a coating, and the polyester of the core layer is not affected at all. The product is strong and has good waterproof performance. Freudenberg uses PA/PET two different composite fibers Evolon to process into ultra-fine composite spunbonded nonwoven fabrics with good quality, good appearance and dimensional stability. Neu mag uses the technology of Ason Company of the United States to process PP/PE core-core two-component composite spunbonded nonwoven fabric , which has soft hand feeling and good performance. One of the new developments in the spunbond production process is the use of bicomponent spinning, with sheath core fibers being the most common. The outer layer of the sheath-core filaments spun is a low melting point polymer. Typical sheath core products are mainly PE/PP, PP/PET, PE/PET, CoPET/PET, etc., another double group. The fiber is split and the fiber fineness is 0 1d. The use of bicomponent fibers increases production speed, reduces costs, and provides high product strength. Bicomponent filaments are composed of two different polymers. The most common structural forms currently available are sheath-core, side-by-side, and exfoliation. The sheath-core bicomponent fiber generally refers to a single core and can be divided into a core type and an eccentric type. The side-by-side type is formed by heat treatment using two polymers having different heat shrinkage properties. Peel-off bicomponent fibers are a common method for producing ultrafine fibers, which are spun into a single fiber in a certain combination using two non-adhesive polymers. The components in the cross section are distributed in different shapes and then each combination in the fibers is separated from each other by physical or chemical stripping methods. Reifenhauser in Germany, Akzo in the Netherlands, Nordson in the United States (already merged by Neumag Newmag), Ason in the United States (already merged by Neumag Newmag), American Hill ( Hills) offers two-component spunbond technology.