Study on a Low Melting Temperature Polypropylene Resin for Melt Spinning Fiber Application

2023-04-28 16:46:26 By : admin
Melt Spinning for Polymers: An Overview of the Latest Developments

Melt spinning, a process where a molten polymer is extruded through a spinneret and stretched to form a fiber, is widely used in the production of fibers and non-woven fabrics. The key to successful melt spinning lies in finding a polymer that possesses the necessary thermal, mechanical and rheological properties to endure this process. In recent years, polymers with low melting temperatures and high isotacticity have been in high demand to produce high-performance fibers. A recent study on the structure and properties of a metallocene polypropylene resin with low melting temperature for melt spinning fiber application has shown great promise for the future of melt spinning for polymers.
Polymers | Free Full-Text | Structure and Properties of a Metallocene Polypropylene Resin with Low Melting Temperature for Melt Spinning Fiber Application


The study focused on the comparison of three polypropylene resins, namely a newly developed metallocene polypropylene (iPP-1) resin with low melting temperature, a commercial metallocene iPP (iPP-2), and a conventional Ziegler-Natta iPP (iPP-3), with the aim of assessing their potential for melt spinning fiber applications. The team behind the study investigated the structure, thermal and mechanical properties, and feasibility of producing fibers for each of the three samples. The study found that Tm of iPP-1 was about 10°C lower than the other two samples, which was well addressed in both the resin and the fiber products. Additionally, the newly developed iPP-1 possessed higher isotacticity and crystallinity than the commercial ones. The crystal grain size of iPP-1 was also smaller than those of the two other commercial iPPs, thanks to the addition of calcium stearate. iPP-1 was found to have a similar rheological behavior as the commercial ones, and good spinnability within a wide range of take-up speeds (1200–2750 m/min). The tensile property of fibers from iPP-1 was better than commercial ones, which could fulfill the application requirement.

The formation of the mesomorphic phase in iPP-1 during melt spinning was confirmed by the orientation and crystallization investigation with wide angle X-ray diffraction (WAXD). The mesomorphic phase is responsible for the excellent processing capability and the mechanical properties of the resultant fibers. The study provides deep understanding of the formation mechanism of the mesomorphic phase during fiber spinning and has shown that iPP-1 is a promising candidate for the high-performance PP fiber.

The development of metallocene polypropylene resin with low melting temperature has opened up new possibilities for melt spinning for polymers. The use of low melting temperature polymers simplifies the process of fiber production and reduces energy consumption. Additionally, high isotacticity and crystallinity make the resultant fibers strong and durable. The potential applications of these fibers span across different industries, including medical textiles, military, and sports equipment.

In conclusion, the latest study on metallocene polypropylene resin with low melting temperature for melt spinning fiber applications has provided a promising candidate for the high-performance PP fiber. The development of low melting temperature polymers has opened up new possibilities for melt spinning for polymers, and the continued research and exploration of these polymers hold exciting potential for future advancements in this field.

Keywords: Melt Spinning, Polymers, Metallocene Polypropylene, Fiber Production, Low Melting Temperature, Isotacticity, Crystallinity.