Glass fiber varieties use (1) - non-twist roving

non-twist roving

The roving is made of parallel raw wire or parallel monofilament. Twistless roving according to the glass composition can be divided into: alkali-free glass roving and alkali glass roving. Production of glass roving used glass fiber diameter from 12 ~ 23μm. The number of roving rovings is from 150 to 9600 (tex). The roving can be used directly in some composite material forming methods, such as winding and pultrusion processes, which can also be woven into a roving fabric because of their uniform tension and further chopped rovings for some applications The

(1) Twistless roving for jetting The roving for use in FRP injection molding has the following properties: (1) good cutting property, and less static electricity during continuous high-speed cutting; (2) non-twist roving Efficiency is high, that is, the beam splitting rate is high, usually require more than 90%; ③ chopped after the original wire with excellent cover, can cover the mold in every corner; ④ resin soaked fast, easy to roll Easy to drive out the bubble; ⑤ original barrel to improve the performance, uniform density of roving, suitable for a variety of spray gun and fiber delivery system. Spraying with roving is made of multi-stranded wire system, each strand contains 200 glass fiber monofilament.

(2) SMC with roving SMC that is chip molding compound, mainly used to suppress the car parts, bathtub, water tank board, cleaning tank, various seats and so on. SMC with roving in the manufacture of SMC sheet to cut into lin (25mm) length, dispersed in the resin paste, so the requirements of the roving for SMC with twist is good, less hair, antistatic excellent , The chopped wire does not adhere to the knife roll during cutting. For colored SMC, the roving is impregnated with resin in a high pigment content resin paste. Usually SMC roving is generally 2400tex, a few cases also useful 4800tex.

(3) winding with roving winding method used to create a variety of caliber glass pipe, tanks and so on. The number of twistless rovings used is from 1200 to 9600, and the large pipes and tanks are mostly inclined to direct roving, such as 4800tex direct roving. The requirements for the twistless roving for winding are as follows: ① into a good band, was flat belt; ② twist roving easy to solve, from the bobbin when not off the ring, do not form a "nest" ③ uniform tension, no overhanging phenomenon; ④ linear density uniformity, generally less than ± 7%; ⑤ twist roving permeability, from the resin tank through the resin when easy to wet and soaked.

(4) pultrusion with roving shrinkage for the manufacture of cross-section consistent with the various profiles, which is characterized by high glass fiber content, one-way strength. Pultruded roving can be multi-stranded wire can also be a direct twist roving, the linear density range of 1100 to 4400. A variety of performance requirements and winding twist roving roughly the same.

(5) Weaving roving roving twisted roving an important use is to weave a variety of thickness of the grid or one-way twist roving fabric, which are mostly used for hand-paste glass fiber reinforced plastic molding process. Strong roving for strong use of the following requirements: ① good wear resistance; ② good into the belt; ③ weaving roving in the weaving before the need for forced drying; ④ twist yarn tension uniform, hanging Meet a certain standard; ⑤ twist roving easy to improve; ⑥ twist roving permeability is good.

(6) Tensile ropes in preforms In a preform process, the roving is routed and sprayed onto a predetermined shape of the web while spraying a small amount of resin to fix the web and then forming the formed fibrous web Metal mold, into the resin hot forming, that is, products. The performance requirements for the roving of this process are essentially the same as those for jet twist rovings.

Hebei Yuniu Fiberglass manufacturing Co., Ltd. 

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