As an important chemical fiber material, polypropylene staple fiber plays a key role in many fields. It takes polypropylene resin as the main raw material, through a series of precision processes, and finally becomes a fluffy fiber with specific properties and specifications.

First, polypropylene staple fiber preparation process system

Polypropylene staple fiber is based on polypropylene resin as the raw material, through the melt spinning process to form continuous fiber, the fiber structure is strengthened by drafting, the mechanical crimping process to give fluffy characteristics, and then drying and shaping treatment to ensure dimensional stability, and finally cut into a specific denier and length of short fiber products according to the specifications. The process system can produce two series of colored and colorless products according to demand, and realize the whole process from raw materials to finished products.

Second, core performance advantage analysis

Physical properties: Low density of 0.91g/cm, significantly lower than most synthetic fibers, showing good floating performance. Its breaking strength can reach 3.5-7.0cN/dtex, with excellent tensile resistance, with 20-40% elongation at break, showing excellent flexibility.

Chemical stability: stable in acid-base environment, experimental data show that the strength retention rate is still more than 95% after soaking in 5% hydrochloric acid solution for 24 hours. Seawater immersion test shows that its salt corrosion resistance is better than that of conventional fiber materials.

Functional characteristics: It has a unique core suction effect, and the moisture conduction rate can reach 0.3-0.5cm/min, which is better than traditional cotton fiber. The thermal bonding temperature range is 130-160℃, which is suitable for a variety of nonwovens processing processes.

Third, functional modification technology

Product performance can be customized by adding functional masterbatches:

Anti-aging modification: The hindered amine light stabilizer was added, and the yellow index was less than 3 after 500 hours by QUV accelerated aging test.

Flame retardant modification: The use of phosphorous flame retardant system, limiting oxygen index (LOI) can reach 28%, meet the B1 flame retardant standard.

Antistatic modification: Adding carbon nanotube composite masterbatch, the surface resistivity can be reduced to 10^8Ω · cm.

4. Typical application areas

Filter materials: In the field of air filtration, the filter element prepared by 5-15μm fine denier fiber can intercept PM2.5 with an efficiency of 99.5%.

Automotive interior: The needle felt material is used for the interior of the door, and the wear resistance is more than 50,000 times after dynamic friction test.

Medical materials: The moisture permeability of SMS non-woven products can reach 8000g/m/24h, and the bacterial filtration efficiency is more than 98%.

Industrial textiles: The cable products have been tested by seawater immersion, the strength retention rate is above 90%, and the service life is 30% longer than that of traditional materials.

5. Industry development trend

With the improvement of environmental protection requirements, degradable masterbatch modification technology has become a research and development hotspot. The application of bio-based polypropylene resin has achieved carbon reduction of more than 20%. The development of intelligent temperature control fiber will expand its application space in the field of smart home. In the future, polypropylene staple fiber will continue to develop in the direction of multi-functional composite, fine processing, low carbon and environmental protection.

With its comprehensive performance advantages, the material has shown irreplaceable application value in many industrial fields, and with the continuous advancement of technological innovation, its market prospect is worth looking forward to.

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.