High-strength nylon industrial filament procurement: Industry trends and selection reference 

High-strength nylon industrial yarns, due to their excellent wear resistance, fatigue resistance and breaking strength, have an irreplaceable advantage in areas such as sewing thread, fishing nets, cordage, seat belts, and outdoor sunshades. In recent years, the downstream applications have put forward higher requirements for the dynamic fatigue life and thermal stability of the yarns, and the focus during procurement also needs to be adjusted accordingly. Below, from the perspective of industry trends, we provide you with reference. 

First, the importance of wear resistance and fatigue resistance has increased. 

In the past, when purchasing high-strength nylon industrial yarn, the main consideration was the breaking strength. Now, more and more end products (such as seat belts, ropes, and fishing nets) will undergo repeated bending, stretching and friction during actual use. Therefore, the dynamic fatigue life of the yarn has become more crucial. 

Raw materials and process influence: Nylon 66 and nylon 6 have differences in terms of wear resistance and resilience, and the choice should be based on the application. Additionally, the stretching ratio during the spinning process and the heat setting conditions directly affect the internal crystalline structure of the nylon fibers, thereby influencing the strength retention rate after repeated stress. 

Application scenario matching: When used for sewing thread, it is required that the nylon filament surface be smooth and have few hairs to ensure smoothness during high-speed sewing; when used for fishing nets or ropes, more emphasis is placed on the strength of the knots and the ability to resist seawater corrosion. 

Furthermore, the strength of high-strength nylon filaments will decrease in a humid and hot environment. When used in outdoor or marine scenarios, it is recommended to pay attention to whether the supplier provides anti-aging or waterproof treatment solutions. 

II. Requirements for thermal stability and dimensional stability are increasing. 

In applications such as curtain lines, industrial frameworks, and cable and optical cable frameworks, nylon industrial yarns will undergo high temperatures during the subsequent processes of dipping in glue, shaping, or usage. Therefore, the yarns need to have excellent thermal stability. 

Heat shrinkage rate control: Different processing methods have different requirements for the heat shrinkage rate of nylon filaments. When used as tire cord, it needs to match the rubber vulcanization temperature; when used as outdoor sunshade fabric, it is required to have good dry heat resistance to reduce shrinkage deformation during use. 

Strength retention rate: After heat treatment, the percentage of remaining strength of the silk thread is an important reference for measuring its thermal stability. If the supplier can provide data on the strength changes at different temperatures, it will be helpful for the selection process. 

It is worth noting that the light resistance of nylon is relatively weaker than that of polyester. When using fabrics for long-term outdoor exposure (such as sunshade fabrics), it is recommended to check whether anti-ultraviolet stabilizers have been added, or to use them in combination with polyester. 

Summary and Selection Suggestions 

When purchasing high-strength nylon industrial yarn, the following points are recommended to be paid attention to: 

Clarify the dynamic load requirements: Is it static load-bearing or repeated stress? For scenarios such as safety belts, ropes, and fishing nets, the focus should be on the strength of the knots and their fatigue resistance. 

Evaluate the heat treatment process: Are there any steps such as gelation, heat setting or high-temperature usage in the subsequent process? Based on this, select the appropriate range of heat shrinkage rates. 

Confirm the requirements for weather resistance: When used in outdoor or marine environments, please confirm whether it has UV resistance or is resistant to seawater treatment. 

Changzhou Shengjie Heuli Chemical Fibers Co., Ltd. has extensive experience in the chemical fiber industry. It specializes in high-strength nylon industrial yarn, high-strength polyester industrial yarn, high-strength polypropylene industrial yarn, flame-retardant yarn, etc. Its products are widely used in sewing thread, fishing nets, curtain threads, seat belts, outdoor sunshade fabrics, etc. We welcome communication regarding specific requirements. 

Website: www.sjfibre.com

Contact Information:

Address: No. 89, Henan Road, Hangling Town, Wujin District, Changzhou City, Jiangsu Province 

Telephone: 0519-83347618 

Email: sjfiber@163.com