When the fiberglass drawing operation is normal, what situations are likely to occur if the sizing agent is not stable?

(1) Wire drawing is not smooth, and the fiberglass filaments are easy to break and fly on the oiler or bunching wheel (plate), causing the wire drawing operation to fail to operate normally. The viscosity of the sizing agent is too high or there are granular precipitations in the sizing agent, causing the tension of the fiberglass filaments to fluctuate and easily break; the sizing agent is unstable under high shear force operation, and particles precipitate and adhere to the graphite roller, causing flying.

(2) On the graphite roller of the monofilament oiler, the impregnant has fish eyes and many black spots. This is because some components in the impregnant have poor hydrophilicity, are oily, and are not easy to adhere to the graphite roller. It also shows that the emulsion is not stable enough, and some organic film-forming agents are freed from the emulsion, resulting in uneven coating on the fiber surface and reduced performance.

(3) Foaming, that is, the foam in the sizing agent contains more air, causing foaming on the monofilament oiler, uneven coating on the fiberglass surface, and overflow of sizing agent foam in the storage tank and circulation tank. The reason is the improper type and dosage of emulsifier, and the appropriate defoaming agent should be selected for defoaming.