Polypropylene fine denier has pioneered a new paradigm of green manufacturing!
In the field of synthetic fibers, Polypropylene fine denier is reshaping industry standards with disruptive technologies. As an advanced product of polypropylene-based materials, its fineness has exceeded the critical value of 0.55dtex, and the fiber diameter has reached the micrometer scale, marking that the fiber manufacturing process has entered the era of nanometer-level precision. This breakthrough stems from the molecular chain reconstruction technology of controllable rheological polypropylene resin. Through the synergistic effect of a twin-screw extruder and a high-precision spinneret assembly, stable spinning of the melt at a high temperature of 286 ° C. Combined with the deep purification of a 15μm pre-filter core and a 400-mesh metal filter screen, it ensures that the uniformity of the single filament reaches ±0.02dtex, setting an industry benchmark.
The physical properties of Polypropylene fine denier break through the limitations of traditional fibers. Its specific surface area is 300% higher than that of conventional polypropylene, endowing the fiber with an outstanding capillary effect - the water conduction rate reaches 0.8g/cm·min, which is six times higher than that of nylon. This core-suction effect stems from the three-dimensional helical groove structure formed on the fiber surface, which presents regular honeycomb-like pores under a scanning electron microscope, enabling the rapid migration of moisture in a gas-liquid phase composite mode. Meanwhile, the crystallinity of the fibers is precisely controlled within the range of 45% to 50% through heat treatment processes, ensuring a breaking strength of 12cN/dtex while maintaining an elongation at break of 35%, thus forming a mechanical system that combines rigidity and flexibility.
In terms of environmental protection, Polypropylene fine denier has pioneered a new paradigm of green manufacturing. Its original liquid coloring process directly integrates the dye into the polymer melt, avoiding the COD emissions of traditional dyeing processes and saving 12 tons of water per ton of fiber production. What is more worthy of attention is that this material can achieve a biodegradation rate of 90% in the natural environment, with the degradation products being carbon dioxide and water, meeting the EU Ecolabel certification standards. This environmental friendliness stems from the molecular design of its hydrocarbon chain structure. By introducing degradable ester-based functional groups, the fibers undergo chain breakage reactions under the action of specific microorganisms.
