In the field of differentiated fibers, polypropylene ultra-fine denier yarns are gradually becoming an important direction for the development of functional fabrics. These fine-denier polypropylene yarns, produced through special spinning processes, typically have a single filament linear density of less than 1.0 denier. Their fine texture endows traditional polypropylene fibers with a completely new fabric expressiveness.
The core advantage of polypropylene ultra-fine denier yarn lies in the capillary effect. Due to the extremely small diameter of the single yarn, the fibers can form dense and fine channels, allowing moisture to quickly conduct along the longitudinal direction of the fibers and diffuse and evaporate after contacting the fabric surface. This characteristic enables ultra-fine denier polypropylene to naturally exhibit the functions of moisture absorption and sweat discharge in sports clothing, underwear, and other scenarios, achieving a dry and comfortable wearing experience without the need to add any additives. At the same time, the polypropylene material itself does not absorb water, and the moisture regain rate is controlled below 0.05%, with a significantly faster drying speed than common natural fibers.
In terms of feel and appearance, the fine denier polypropylene filament has broken through the limitations of the traditional coarse and stiff nature of polypropylene. After undergoing reasonable weaving process treatment, the fabric presents a soft and smooth touch, and its draping performance has been significantly improved. Whether used for knitted underwear, outdoor sports socks, or as high-end lining materials, the polypropylene ultra-fine denier yarn can provide a balance of lightweight warmth and breathability without increasing the weight of the fabric. Its density is only 0.91 grams per cubic centimeter, making it a representative of lightweight fibers among common fibers. The resulting garments have a low wearing burden.
At the processing technology level, the production of ultra-fine denier polypropylene requires strict control over spinning temperature, cooling conditions, and stretching processes. Currently, the industry has achieved stable mass production of fine-denier polypropylene filaments by optimizing the design of spinnerets and spinning components. This fiber can also be combined with other natural or synthetic fibers for spinning, weaving, and blending, expanding a composite fabric system that combines comfort and functionality.
As consumers' awareness of functional textiles increases, polypropylene ultra-fine denier yarns, due to their physical moisture absorption and evaporation, lightweight nature, as well as environmental friendliness and recyclability, are gradually being applied in more professional sports, medical protection, and personal care fields. This direction of fine denierization provides a new technical path for the application of fiber materials in high-end textiles.
Zhejiang Xuri Fiber Co., Ltd. was founded in 1990 and is a high-tech enterprise integrating research and development, production and sales. The company adheres to the business philosophy of "Everything for the customer, and everything for the customer's sake", and takes "Self-improvement, becoming refined and strong" as its corporate spirit. It adheres to the business policy of "Mutual benefit, mutual profit, mutual trust", and strives to build a harmonious, warm and vibrant Dongsheng Xuri.
Xiriyi Fiber was originally a company that produced plastic woven bags. In 1994, the product line was restructured and innovated, and they started producing polypropylene filament and polypropylene stretch filament (DTY). In 1998, Rui'an Xiriyi Fiber Co., Ltd. was established. Xiriyi Fiber, leveraging its years of experience in the chemical fiber industry and profound professional expertise, responded to the national call for energy conservation and emission reduction. In 2003, it independently developed FDY polypropylene filament. At the same time, it introduced spinning technologies from several foreign countries such as Germany and Japan, which played a role in upgrading the two-step spinning technology used by domestic manufacturers, enabling the company to make significant progress in the market competition.
