Glass fiber needled felt needle felt or glass fiber high temperature resistant dusting cloth bag short cut fiber needle felt and continuous filament glass fiber needle felt. The short cut fiber needle felt is cut the glass fiber roving into 50mm. It is laid on the bottom material which is placed on the conveyor belt in advance. Then the needle is needled with the hook with the hook. The short cut fiber is inserted into the bottom material, and the crochet needle brings some fibers up to form a three-dimensional structure. The base material can be a thin fabric of glass fiber or other fibers, and the glass fiber needle felt has a sense of fluff. The main uses of twill glass fiber felt and satin glass fiber felt are used as insulated sound insulation material, hot material, filter material, and can also be used in the production of glass steel, but the strength of the made glass steel is low and the range of use is limited. Another kind of continuous raw silk needle felt is to throw the continuous glass raw wire into the continuous mesh belt randomly, and needle the needle plate through the needle plate to form the felt of the three-dimensional structure of the fiber connected with each other. The high temperature and high pressure cleaning method of glass fiber resistant and high temperature dusting bag is used to enhance the tensile strength of the filter fabric of glass fiber dust collector. The post treatment methods have graphite treatment, silicone oil treatment, soft appearance, high swelling property, 1.5-3 times more than ordinary filter material and good acid resistance. It is widely used in cement, steelmaking, coking and other industries. The temperature can be up to 280-295 C, the efficiency of dust removal is high and the use period is long. Physical properties of continuous glass fiber plain cloth.