Polypropylene has good processing properties. Like general thermoplastic resins, it can be processed by injection molding, extrusion, blow molding and spinning, as well as welding, thermoforming, electroplating and foaming. processing. Containers, pipes, plates, films, flat yarns, fibers, bottles and various injection molded parts can be prepared. Polypropylene has good fluidity, high softening point, and low enthalpy, so the molding cycle is shorter than most thermoplastics, and it does not require drying before processing. The molding method has a certain relationship with the melt flow rate (MFR) of different products and the selected resin.

The polypropylene staple fiber process seems simple and convenient, but in fact, if there is a slight error in the operation, it will have a greater impact on the finished product, such as the problem of excessive elongation of the polypropylene staple fiber. Is the process of polypropylene staple fiber really as simple as you see it?

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

In spinning, it has been found that the strength of the yarn after blending is poor, such as the quality index of pure polypropylene is 2808, the index of polypropylene 50% cotton blend is 1950, the index of polypropylene 50% cotton blend is 2193, and the quality index of 215 pure cotton is 2336. It can be seen from the above data that the strength of pure spun polypropylene yarn is the highest, far higher than 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 blending, it is also related It is difficult to control the elongation of polypropylene staple fiber, so the seemingly simple process is also a test of the manufacturer.

The appearance of polypropylene staple fiber  looks like a ball of cotton, which is soft and has a certain elasticity. The elongation performance of polypropylene staple fiber is large, and it is easy to control in production, and the elongation will be over 60%. 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 wire, it is easy to wind the roller to break the end when the stretching ratio is increased, or sometimes it retracts after being stretched. In production, it is often found that the retraction of the yarn between the second and third stretching machines when the machine is stopped will pull the three five rollers upside down, indicating that after orientation, the fiber has a large internal stress and retracts. These can be improved by intense heat setting or appropriate heat treatment.

Hubei Botao Synthetic Fiber Co., Ltd. was established in October 2000, specializing in the production and sales of polypropylene, polyester, composite fibers, and polylactic acid staple fibers. and other industries. The company is located in Jingmen City, Hubei Province, and now has six branches with a total area of 300,000 square meters. The company is equipped with imported fiber production lines, with fixed assets exceeding 100 million yuan, with an annual output of 50,000 tons of polypropylene staple fibers, 20,000 tons of polyester staple fibers, and 10,000 tons of composite fibers, with an annual output value exceeding 500 million yuan.

The company adheres to the basis of technological innovation, introduces new technical talents, cooperates with universities and colleges in research and development, and builds a high-end BOTO brand. The company has more than 280 employees, including 8 engineers and more than 30 other technical personnel. It has strong technical force, strict quality inspection system and independent research and development, production and marketing capabilities. It is a leading enterprise in China's polypropylene industry. "Polypropylene Staple Fiber" industry standard, is the vice-chairman unit of the polypropylene branch of China Chemical Fiber Association.