The main use of glass fiber mat:
(1) Chopped strand mat: Cut the glass strands (or sometimes untwisted roving) into 50mm lengths, spread them randomly but evenly on the mesh belt, and then apply emulsion adhesive or sprinkle powder binding agent After heating and curing, it is bonded into chopped strand mat. Chopped strand mats are mainly used in hand lay-up, continuous board making and compression molding and SMC processes. The quality requirements for chopped strand mats are as follows: ①The area quality is uniform along the width direction; ②The chopped strands are evenly distributed in the mat surface without large holes, and the binder is evenly distributed; ③Has moderate dry mat strength; ④Excellent The resin infiltration and permeability.
Chopped strand mat
(2) Continuous raw silk felt: the glass raw filaments formed during the drawing process or the continuous raw filaments retired from the raw filament tube are laid on a continuous moving mesh belt in a figure of 8 and are bonded by a powder adhesive. . The fiber in the continuous glass fiber mat is continuous, so its reinforcing effect on the composite material is better than that of the chopped strand mat. Mainly used in pultrusion, RTM, pressure bag and glass mat reinforced thermoplastic (GMT) processes.
(3) Surface felt: FRP products usually need to form a resin-rich layer, which is generally achieved by using medium-alkali glass surface felt. Because this kind of felt is made of medium-alkali glass (C), it endows the glass fiber reinforced plastic with chemical resistance, especially acid resistance. At the same time, because the felt is thin and the diameter of the glass fiber is small, it can also absorb more resin to form a resin-rich layer. The texture of the glass fiber reinforced material (such as checkered cloth) is used for surface modification.