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How to improve the breaking strength of polypropylene BCF yarn? Please look down:
Polypropylene BCF yarn has the advantages of light texture, high strength, good elasticity, abrasion resistance, corrosion resistance and bright color. It is mainly used for carpet suede. The breaking strength is an important quality index, and the breaking strength is low, which will cause more interruptions in the carpet processing process, which will reduce the production efficiency and affect the quality of the carpet.
The first method is to use the domestically produced T30S, F401 two grade injection molding grade polypropylene chips, add cooling masterbatch, can produce polypropylene BCF yarn. According to the addition amount of different kinds of masterbatch, the addition ratio of the cooling masterbatch is determined, and the breaking strength can be appropriately increased. However, a more effective way is to increase the draw ratio, which can be achieved under the condition that the elongation at break of the fiber reaches the standard.
The second method is to keep the spinning box temperature higher than the extrusion melt temperature by 5-10 ° C, use the lower side blowing temperature as much as possible, and adjust the other process parameters to make the polypropylene BCF yarn break strength at 1.70. -1.90 cN ?d tex , other indicators have reached the ministerial standard.