The process of "more combing, less beating, light beating, low speed and thin feeding" was adopted in the process of polypropylene staple fiber cotton cleaning. The quantitative volume of cotton winding was 3809/m, the speed of the carding needle of the cotton opening machine was reduced to about 458R /min, the speed of the winding machine was reduced to about 72Or/min, and the length of the rib extended by the cotton grasping goon was adjusted to 2mm. Car fall a distance of 3 mm, do grasp less frequently, to reduce fiber damage and neps formation, improve the work efficiency of plucker to 85%, lap weight unevenness index in less than or equal to 1.3%, but less than or equal to 1.1% in real terms, after the qing cotton combed cotton when follow "slow speed, light is quantitative, big separation" principle will superfine polypropylene staple fiber yarn spinning and weaving, Pay attention to the amount of cotton and the intensity of the spike roller, and control the rotation of the tin spike roller is the combing time of the polypropylene staple fiber.

In the spinning process of polypropylene staple fiber, he drawing process adopts the measures of "heavy pressure, large spacing, light weight, anti-static" and so on. The number of fiber roots in unit cross section of the half product is close to twice that of the conventional polypropylene yarn, so the drawing factor of the back area of the drawing is appropriately enlarged. In THE DRAWING distribution, the drawing machine adopts the form of inverted drawing, and the head adopts the large drawing multiple of about 10 times, which improves the fiber STRAIGHTness and the sliver fiber arrangement EVENness. Besides improving the sliver structure, it also relieves the drafting burden of other machines. Polypropylene staple fiber has low flexural strength and is easy to be wound by cots and rollers, resulting in yarn defects. The speed should not be too high.

What is the attention of polypropylene elongation in polypropylene staple fiber?

1. Increase the stretch times, make polypropylene stretch as far as possible to pull foot, and make the stretch back to shrink, so as to do less spinning wool yarn breakage, cooling condition control is appropriate, oil-free wire molecular weight is not too large.

2. Control the shaping conditions, polypropylene after shaping, can reduce the elongation, should choose to crystallize the shaping temperature, the current selection of 120-130℃, if the bundle is too tidal, can also reach 135℃.

3. The temperature of superheated steam should be ensured to be above 135℃, which has certain benefits for normal stretching and reducing elongation.

Our company produces polypropylene staple fiber with sizes from 3D to 300D and lengths of 38.4, 57, 65, 76, 90, 102mm in various specifications and colors. We can also organize and produce polypropylene staple fiber with special requirements according to users' needs.

Hai'an County Qinfeng Chemical Fiber Co., Ltd. specializes in production and sales:polypropylene staple fiber, Polyester Staple Fiber, functional polypropylene short fiber, functional polyester staple fiber, hydrophilic polyester staple fiber,  polypropylene, PP staple fiber, polyester staple fiber.