The production process of polypropylene staple fiber seems simple and convenient, but in fact, if the operation is slightly wrong, it will have a great impact on the finished product, such as the problem of excessive elongation of polypropylene staple fiber. What problems can you meet in the production of polypropylene short fiber maintenance?

In spinning, it has been found that the strength of yarn after blending is poor, such as the quality index of pure polypropylene fiber 2808, polypropylene 50% cotton blend index 1950, polypropylene 50% cotton blend index 2193,215 pure cotton quality index 2336. As can be seen from the above data, pure spinning polypropylene yarn strength is the highest, far higher than cotton, but with cotton blending, but not as high as pure cotton, although this situation may be related to the uneven mixing of polypropylene fiber and cotton, but also with polypropylene fiber is difficult to control the stretch length, so it seems to be more than caring about the simple process is more test manufacturers.

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

Because the silk is not uniform, improve the elongation of easy winding roll break, or sometimes pull back after the foot. In production, it is often found that the retraction between the second and third drawing machine will pull three sets of five rollers to reverse, indicating that after orientation, the internal stress of the fiber is great and there is retraction. These can be improved by intense heat setting or appropriate heat treatment.

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.