For industry insiders who need to purchase and use Polypropylene high-strength fibre, it is crucial to have a thorough understanding of the production technology and selection criteria behind it. This not only concerns product quality, but also directly affects the performance and cost-effectiveness of the final product. This article will comprehensively reveal the secrets of Polypropylene high-strength fibre for you, helping you make a wise choice.
I. How to Achieve High Performance? The core lies in the production process
The essential difference between ordinary polypropylene and Polypropylene high-strength fibre lies in the production process. High-quality polypropylene high-strength filament usually originates from the integrated spinning and drawing technology of "one-step method" or "two-step method".
Key process - hot drawing: This is the core link in manufacturing high-strength filaments. By subjecting the virgin silk to several times the thermal stretching between multiple sets of hot rollers, the disordered polypropylene macromolecular chains are forced to align neatly along the fiber axis, forming a highly crystalline and oriented structure. This process is like exercising muscles. The more orderly the molecular chains are arranged, the higher the strength of the fibers will be, but the elongation will also decrease accordingly.
Ii. How to Identify High-Quality Polypropylene high-strength fibre?
When facing numerous suppliers in the market, the following points should be given special attention when making purchases:
Physical indicators
Breaking strength: This is the core indicator, and the unit is usually cn/dtex or N/tex. The higher the value, the stronger the silk thread is.
Elongation at break: High-strength wires usually have a relatively low elongation at break, which ensures that they undergo small deformation and dimensional stability under force.
Linear density and uniformity of the thread: Check whether the specifications of the silk thread are accurate and whether the thickness of the entire strand of silk is uniform. This directly affects the yield and quality of the subsequent weaving.
Appearance and feel
High-quality silk thread is pure in color and lustrous, with a well-formed filament tube and smooth unwinding.
The texture is smooth, free of fuzz, stiff threads or oil stains.
Chemical and anti-aging properties:
According to the application environment, confirm whether its chemical corrosion resistance meets the requirements.
For outdoor use, it is necessary to pay attention to whether high-quality ultraviolet (UV) additives have been added to extend the service life.
How to identify high-quality polypropylene high-strength fibre?
