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Analysis of the Material Properties of High-strength Polyester Industrial Filament of Changzhou Shengjie Heli Chemical Fiber Co., LTD.!

High-strength Polyester Industrial Filament is a high-performance synthetic fiber mainly made of polyethylene terephthalate (PET). As an important basic material in the industrial field, its unique chemical composition and physical structure endow the product with excellent mechanical properties and durability, demonstrating outstanding reliability in various harsh application environments.

From the perspective of chemical composition, the core material of high-strength polyester industrial filament is linear polyester polymer. This polymer is formed by the polycondensation reaction of terephthalic acid and ethylene glycol. The regularly arranged benzene ring structure on the molecular chain endows the material with high rigidity and thermal stability. Compared with conventional polyester, industrial filament grade polyester raw materials have higher purity and a narrower molecular weight distribution, ensuring the performance consistency of the final product. The special catalyst system and polymerization process control usually keep the molecular weight of the polymer within the range of 20,000 to 30,000, which is the basis for obtaining high strength characteristics.

At the molecular structure level, high-strength polyester industrial filament exhibits highly oriented morphological characteristics. Through the optimized spinning and stretching process, the polyester molecular chains are highly arranged along the axial direction of the fibers, and the crystallinity can reach 50%-60%. This oriented crystalline structure enables the material to achieve a significant increase in strength while maintaining a certain degree of flexibility. X-ray diffraction analysis shows that the crystal size of high-quality industrial filaments is usually in the range of 5 to 10 nanometers, and the ratio of crystalline to amorphous regions is precisely controlled, balancing the relationship between strength and elongation.

In terms of physical properties, the typical strength of High-strength Polyester Industrial Filament can reach 7.0-9.0cN/dtex, the initial modulus is between 80-120 CN /dtex, and the elongation at break is controlled within the range of 10%-20%. This excellent mechanical property stems from the multi-level structure of the material: a nanoscale crystal network provides rigid support; The oriented amorphous region endows elasticity; The uniform fineness distribution at the macroscopic level ensures performance consistency. In addition, the glass transition temperature of the material is approximately between 70 and 80℃, and the melting point is 255-265℃. This enables it to maintain stable working performance within the temperature range from room temperature to medium and high temperatures.

Chemical stability is another important characteristic of high-strength polyester industrial filament. Although the ester bonds in polyester molecules have a certain polarity, the shielding effect of the benzene ring makes the material significantly more resistant to acids and alkalis than other common synthetic fibers. Within the pH range of 3 to 9, the material is almost unaffected. It also shows good resistance to most organic solvents. This chemical inertness makes industrial filaments suitable for various complex environments and significantly extends their service life.

From a microscopic perspective, the cross-section of high-strength polyester industrial filament is usually circular or trilobular, and the surface smoothness is precisely controlled. The fiber diameter can be adjusted within the range of 10 to 30 microns according to application requirements. Through special spinning plate design and stretching processes, special cross-sectional forms such as hollow and irregular shapes can also be obtained, further expanding the application possibilities.

In terms of environmental adaptability, the inherent characteristics of the material make high-strength polyester industrial filament have a relatively low moisture absorption rate (about 0.4% under standard conditions), and this feature enables the fiber to maintain stable mechanical properties even in a humid environment. By adding ultraviolet absorbers and other modification methods, the weather resistance of the material can also be significantly improved, making it meet the requirements of long-term outdoor use.

With the development of materials science, the material system of high-strength polyester industrial filament is also constantly innovating. The flexibility of the material can be adjusted by introducing a third monomer through copolymerization modification. The composite of nanomaterials enhances specific properties; The application of recycled polyester embodies the concept of sustainable development. These advancements at the material level continue to drive the expansion of the performance boundaries of high-strength polyester industrial filaments.

Changzhou Shengjie Heli Chemical Fiber Co., Ltd. was founded in 1999 and is located in the Zhen Dong Industrial Zone, Huangli Town, Wujin District, Changzhou City. It is a professional manufacturer of high-strength polyester industrial filament, high-strength nylon industrial filament, high-strength polypropylene industrial filament, polyester flame-retardant filament, polypropylene flame-retardant filament, polyester FDY filament and air-molded filament.