The process of polypropylene staple fiber is not simple, in fact, if the operation is slightly wrong, it will have a greater impact on the production of finished products

Polypropylene staple fiber looks like a group of cotton, soft and elastic, polypropylene staple fiber elongation performance is large, easy to control in production, elongation will be 60% longer, in addition to its polypropylene macromolecule itself structural factors, in the production process may also be insufficient tensile.

Because of the large non-uniformity of the silk, it is easy to increase the tensile ratio of the roll to break, or sometimes shrink after pulling the foot. In production, it is often found that the retraction of the wire between the second and third drawing machine during parking will pull three five rollers to reverse, indicating that after orientation, the internal stress of the fiber is large and there is retraction. These can be improved by intense heat setting or appropriate heat treatment.

What is the problem of excessive elongation of polypropylene staple fiber?

Excessive elongation of polypropylene staple fiber will bring a lot of harm. And in the blending, the strength of the yarn will also be affected.

The strength difference of yarn after blending was found in spinning, such as the quality index of pure polypropylene 2808, the polypropylene 50% cotton blend index 1950, the polypropylene 50% cotton blend index 2193,215 pure cotton quality index 2336. It can be seen from the above data that pure spun polypropylene yarn strength is the highest, far higher than cotton, but after cotton blending, it is not as high as pure cotton, although this situation may be related to the non-uniformity of polypropylene staple fiber and cotton mixing, and it is also related to the difficulty of controlling the stretch length of polypropylene staple fiber, so it seems that the simple process is also more testing manufacturers.

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