The spinning process of polypropylene staple fiber is composed of a head-and-side process and a two-draw process.

Head and process: dry quantitative 13.98g/5m, weight drafting 10.01 times, rear zone drafting 1.73 times and combined number 8, front roller speed 250r/min, roller holding gauge 43*55mm, bell mouth diameter 3.5mm .

Two parallel process: dry quantitative 13.55g/5m, weight drafting 8.25 times, rear zone drafting 1.241 times, and combined number 8, front roller speed 230r/min, roller holding spacer 42*54mm, bell diameter 2.8mm.

The quality level of polypropylene staple fiber semi-finished products: the quality index of semi-finished products and the uniformity of the strips are ≤18%, and the unevenness of weight is ≤1.0%. After taking the above measures, the unevenness of the strips is 14.9%. The second and the second are 11.8%, the weight unevenness is 1.1%, and the second is 0.68%.

The spinning technology of polypropylene staple fiber is carried out by the roving process. With the principle of small twist coefficient, large gauge, heavy pressure, small tension and light weight, the roller pressure is more than 25% more than the spinning cotton, and the draw ratio in the rear zone is As with the parallel strip, it should be properly enlarged to reduce the drafting force and the gripping force, and improve the stem level.

Compared with the spun polyester, the roving twist is appropriately reduced, and the roving coefficient of the roving is appropriately reduced. The choice of about 55 can avoid the phenomenon that the spun yarn is not stretched and the "hard head" is formed, and the production efficiency and the yield of the spun yarn are improved. Since the roving is light in weight and low in strength, the elongation of the roving is controlled, and the diameter of the roving package is appropriately reduced to reduce the tension during unwinding, and the drafting is prevented from being caused by poor control.

Hai'an County Qinfeng Chemical Fiber Co., Ltd. relies on the professional power of single flow, the front-end quality inspection system and perfect quality inspection system ranks among the high-quality enterprise queues in the industry, specializing in the production of polypropylene staple fiber, and the "Qinfeng" brand polypropylene staple fiber has superior guidance. Wet and fast drying, good combability and spinning performance, with fast melting, good filling and sound insulation.

"Qinfeng" brand polypropylene staple fiber is looking forward to your call!