How exquisite is the seemingly simple production process of polypropylene staple fiber?

The polypropylene staple fiber process seems simple and convenient, but in fact, if the operation is slightly wrong, it will have a greater impact on the finished product, such as the problem of excessive extension of the polypropylene staple fiber.

Excessive elongation of polypropylene staple fiber will bring many harms. And in blending, it will also affect the yarn strength.

It has been found that the strength of the blended yarn is poor in spinning, such as the quality index of pure polypropylene is 2808, the index of polypropylene 50% cotton blending is 1950, the index of polypropylene 50% cotton blending is 2193, and the quality index of pure cotton is 2336. It can be seen from the above data that the strength of purely spun polypropylene yarn is the highest, far higher than that of cotton, but after blending with cotton, it is not as high as pure cotton. Although this situation may be related to the unevenness of polypropylene staple fiber and cotton, it is also related to The difficulty of controlling the elongation of polypropylene staple fiber is related to it, so the seemingly simple process is also a test for manufacturers.

Polypropylene staple fiber looks like a ball of cotton, soft and elastic. polypropylene staple fiber has a large elongation performance, and it is easy to control poorly in production. The elongation will be over 60% longer. This is except for its polypropylene macromolecules. In addition to its own structural factors, there may also be insufficient stretching during the production process.

Because of the large non-uniformity of the yarn, the winding roller may break when the stretching ratio is increased, or sometimes retract after pulling the foot. In production, it is often found that the retraction of the filaments between the second and the third stretching machine when the machine is stopped causes the three and five rolls to be reversed, indicating that after the orientation, the internal stress of the fiber is very large and there is a retraction. These can be improved by intense heat setting or proper heat treatment.

Haian Qinfeng Chemical Fiber Co., Ltd. specializes in the production and sales of polypropylene staple fiber, PP staple fiber, polyester staple fiber, functional polypropylene staple fiber, functional polyester staple fiber, and hydrophilic polyester staple fiber. Our company mainly produces polypropylene staple fiber and polyester staple fiber: specifications 1.5D to 200D, length 5-150mm, product color sky blue, red, yellow, black, etc., can be customized. Polypropylene staple fiber and polyester staple fiber are rich in variety, support color to map or sample customization, fully meet your individual needs.

If you want to know more product information, please contact: Mr. Qian 13962787918, 13813743991 Website: http://www.glory-fiber.com/