CPE (Chlorinated Polyethylene), as an impact modifier, is mainly used in the field of wires and cables to improve the comprehensive performance of materials and achieve key applications. Its main functions are reflected in the following aspects:
1、 Core performance improvement
1. Enhanced temperature resistance and reliability
The long-term working temperature of CPE modified cables can reach 90 ℃ (optimized formula can reach 105 ℃), significantly higher than the upper limit of 60-65 ℃ of traditional rubber materials, while improving heat aging and ozone resistance performance. Its saturated molecular structure provides excellent weather resistance and adapts to complex outdoor environments.
2. Flame retardant and safety upgrade
Chlorine containing atoms endow CPE with inherent flame retardancy, meeting safety standards such as UL-94, especially suitable for high-risk scenarios such as mining cables. It produces low smoke during combustion and does not release highly toxic gases.
3. Mechanical performance optimization
Adding CPE can enhance the impact strength of cable sheaths (the impact strength is increased by 3-4 times after adding 8-10 parts of CPE to PVC base material), and improve oil resistance, flexural resistance, and wear resistance, extending the service life.
Process and cost advantages
1. Processing adaptability
The CPE mixing temperature range is wide (50-160 ℃), with non stick roller and non scorching characteristics, greatly improving production efficiency. The mixed rubber compound can still be used stably after being stored at room temperature for 1-2 years.
2. Cost effectiveness
Good filling properties (able to accommodate high proportions of mineral powders such as calcium carbonate) reduce the gel content to below 25% while maintaining physical properties and optimizing production costs.
Special application scenarios
Insulation layer protection: CPE does not contaminate the copper core when used as a low-voltage insulation layer, ensuring conductivity stability.
Color and Environmental Protection: White base color supports bright coloring, replacing yellowing natural rubber/chloroprene rubber; Avoid the volatilization of highly toxic solvents during the production process.
Special cables: High demand scenarios such as coal mine cables, elevator cables, and welding machine cables rely on their composite properties of oil resistance, heat resistance, and flame retardancy.
Post time: Jul-25-2025
