The strength of high-strength polypropylene industrial yarn is not low. Why do we always encounter broken warp yarns during weaving? 

high-strength polypropylene industrial yarn is widely used in areas such as webbing, cables, container bags, and industrial fabrics due to its light weight, high strength, and resistance to acids and alkalis. However, during actual weaving, some customers may encounter a puzzling issue: the test report shows that the strength has met the standards, but during weaving, the yarn frequently breaks. The problem often lies in the uniformity of elongation rate and surface fuzziness, rather than just the breaking strength. Below, from two perspectives, we will help you clarify the selection 

1. Uniformity of elongation: The hidden reason for the broken warp yarns during weaving 

high-strength polypropylene industrial yarn requires multiple processes such as warping, threading, and weaving during the weaving process. Each of these processes has specific requirements for the tension stability of the yarn. 

The elongation coefficient (CV value) is more important than the peak strength: The CV value reflects the uniformity of the elongation rate of each filament in a batch of filaments. The larger the CV value, the more uneven the elongation rates of the filaments in the same batch. During weaving, filaments with a larger elongation rate will appear looser under the same tension, while those with a smaller elongation rate will be tighter. This uneven tension can lead to an increase in the breakage rate. When purchasing, you can ask the supplier to provide the CV value data of elongation rate. The smaller the CV value, the higher the weaving efficiency usually is. 

Balance between strength and elongation: Pursuing excessively high fracture strength may sometimes sacrifice elongation or increase its CV value. A moderate strength combined with uniform elongation often shows greater stability during weaving. Shengjie Heuli Chemical Fiber Co., Ltd. in Changzhou has over 22 years of experience in the chemical fiber industry and its products are widely used in industries such as automobiles, textiles, construction, and sports. 

II. Surface Friction and Wear Resistance: Another Challenge in High-Speed Weaving 

During the weaving process, high-strength polypropylene industrial yarn undergoes high-speed friction with metal components such as warping yarns and steel racks. The surface smoothness and wear resistance directly affect the breakage rate of the warp yarns. 

The influence of filament quantity: Wires with more surface filaments have greater friction resistance when passing through the warping threads and the reed, making them prone to fraying or even breaking. When purchasing, you can take a section of the yarn, hold it with your fingers and slide it quickly to feel if the surface is smooth and if there are any burrs. Wires with less filaments are easier to weave smoothly. 

Oiling agent and lubricity: The oiling agent on the surface of the filament can not only reduce friction but also have an anti-static effect. When purchasing, you can inquire with the supplier whether the type and content of the oiling agent have been optimized for high-speed weaving. 

Summary and Selection Suggestions 

When purchasing high-strength polypropylene industrial yarn, it is recommended to confirm the following steps: 

Pay attention to the elongation CV value: While focusing on the strength, it is essential to request the supplier to provide the elongation CV value data. This is a more direct indicator for evaluating the weaving efficiency. 

Check for surface fuzz: Request a sample and feel the surface with your hand to determine if it is smooth and free of burrs. 

Sample machine weaving: Conduct small-scale trial weaving on your own loom to observe the frequency of broken threads and the fabric appearance. 

Changzhou Shengjie Heuli Chemical Fibers Co., Ltd. has over 22 years of experience in the chemical fiber industry. It specializes in high-strength polyester industrial yarn, high-strength nylon industrial yarn, high-strength polypropylene industrial yarn, polyester flame-retardant yarn, polypropylene flame-retardant yarn, polyester FDY yarn, and variable-width yarn, etc. Please feel free to request samples for testing and communicate your specific requirements. 

Official website: http://www.sjfibre.com