The main use of glass fiber
Spray roving for FRP spray roving should have the following properties: cutting and molding good, in electrostatic continuous high speed cutting less; the inefficiency of roving after cutting dispersed into raw silk to be high, namely splitting rate high, usually above 90%; the short cut of raw silk has excellent mould covering, covering every corner of the mold; the resin soak fast, easy to be flat and easy to drive roller of roller and raw silk tube bubble; degradation performance, yarn density uniform, suitable for all kinds of spray gun and fiber transmission system. The roving used for injection is made of strands of raw silk, and each strand contains 200 glass fiber filaments.
Winding is a method of winding with a roving, used for making glass tubes, tanks, etc. of various calibers. Winding roving number from 1200 to 9600, the winding of large pipelines and tanks tend to direct roving, such as 4800tex direct roving. The winding roving requirements are as follows: with a good, a flat ribbon; the roving unwinding is good, in the back off from bobbin solution circle, do not form a nest like floss; the uniform tension, no drape phenomenon; the line density is uniform, must be less than 7%; the roving good soak, easy to from the resin tank through the resin wetting and penetration.
SMC uses roving SMC, a sheet molding compound, for automotive parts, bathtubs, water tanks, purifying tanks, seats, etc.. SMC used in the manufacture of roving SMC sheet to cut the length of Lin (25mm), dispersed in resin paste and so on SMC roving requirement is short of good, low fuzz, excellent antistatic property, while cutting short shred will not adhere to the knife roller. In the case of color SMC, the roving shall be impregnated with resin in a high pigment resin paste. Generally, SMC roving is usually 2400tex, and 4800tex is also useful in a few cases.
