High-viscosity, low-carboxyl polyester chips (COOH <14, IV >0.8) have unique properties for industrial yarn. Our company refines them to COOH <10 and IV >0.85 for better performance. This article covers their benefits, production advantages, spinning suitability, and key applications.
1. Key Benififs
- Stronger Fibers: Higher viscosity creates longer molecular chains and higher molecular weight. This makes fibers stronger, boosting tensile strength and abrasion resistance. So, industrial yarns last longer.
- Reduced Fiber Breakage: Lower carboxyl end groups (<10) reduce active functional groups and internal stress. This decreases yarn breakage during spinning. So, fiber stability improves, and production waste drops.
- Stable Spinning Process: Low carboxyl end group content makes polyester chips more stable at high temperatures. This ensures better melt flow. It can reduce crystallization differences and keep the spinning process smooth at the same time.
- Improved Heat and UV Resistance: These polyester chips enhance the heat and UV resistance of fibers. It is ideal for industrial yarns exposed to outdoor conditions for long periods.
2.Production Advanatges
- Lower Waste, Higher Yield: Lower carboxyl end group content reduces the risk of melt degradation, improving melt stability. This decreases defective products and increases production efficiency.
- More Flexibility in Spinning: High-viscosity polyester chips offer greater flexibility in the spinning process, adapting to different specifications. They can also operate at higher temperatures, preventing solidification risks and increasing efficiency.
3. Compatibility With Spinning Processes
- Suitable for Various Spinning Methods: These polyester chips are suitable for various spinning processes, like melt spinning and air-jet spinning. They produce fine, uniform, and strong industrial yarn. The yarn is widely used in canvas, industrial fabrics, carpets, and more.
- Performs well in High-Temperature Spinning: Low carboxyl end groups improve thermal stability. This prevents degradation in high-temperature spinning.
- Smoother Spinning, Less Resistance: High-viscosity polyester chips enhance melt flow. They reduce fiber-stretching issues like breakage and unevenness. This makes spinning more efficient.
4. Product Features
- Durability and Aging Resistance: Industrial yarns from low-carboxyl polyester chips are strong and long-lasting. They resist UV rays and heat. This makes them perfect for long-term use in canvas and filtration materials.
- High Strength and Toughnes: High-viscosity polyester chips create stronger, tougher yarns. They handle high tension and friction well. This makes them ideal for conveyor belts and engineering textiles.
5. Main Applications
5.1 Industrial Fabrics (Canvas, Filter Cloths):
Used for canvas, construction textiles, and carpets. Strong and durable, they work well for scaffolding covers, banners, and cargo belts.
5.2 Conveyor and Transmission Belts:
Common in logistics and manufacturing. These yarns serve as base materials for belts, handling heavy loads and friction while ensuring stability.
5.3 Automotive Industry:
Ideal for car seat fabrics, interiors, and seat belts. They offer high strength and wear resistance, improving performance and lifespan.
5.4 Filtration Materials:
Used in air, liquid, and oil-gas filters. They perform well in high temperatures and harsh environments.
5.5 Electrical Insulation Materials:
Widely used in transformers and wire protection. They provide excellent insulation properties.
5.6 Fire-Resistant and UV-Resistant Applications:
They resist UV rays, heat, and aging. They are perfect material for fire-resistant fabrics, outdoor sunshades, and other harsh-condition products.
Conclusion
High-viscosity, low-carboxyl polyester chips bring big benefits to industrial yarn. They boost fiber strength, cut waste, and improve efficiency. They work well in canvas, conveyor belts, cars, filtration, and insulation. Their durability, strength, and heat resistance make them a top choice for tough industrial uses.