1. Clarify the requirement for chlorine content
Chlorine content 24% -30%: suitable for manufacturing elastic products (such as wire insulation layers, tires).
Chlorine content 35% -38%: Excellent compatibility with PVC, commonly used for impact modification of hard PVC products (such as door and window profiles, pipes).
Chlorine content>40%: can be used as a plasticizer or anti-corrosion and flame-retardant material.
2. Evaluate molecular weight and raw material type
High molecular weight CPE: It has high viscosity and tensile strength, which may reduce its adhesion to PVC.
Low molecular weight CPE: low viscosity, good flowability, suitable for scenarios with high processing performance requirements.
High density polyethylene substrate: This type of CPE has better heat resistance and is suitable for high-temperature application environments.
3. Match production processes and performance requirements
Chlorine microbubble technology: If it is necessary to improve the efficiency and uniformity of chlorination reaction (such as shortening the production cycle), CPE products using microbubble reaction process can be prioritized.
Foaming application: When used for PVC foam board, it is necessary to combine the foaming ratio (2-3 times), density (0.6-0.7 g/cm ³), and surface hardness to select CPE models that enhance melt strength.
4. Compatibility and functional synergy
Compatibility with PVC: CPE with a chlorine content of 35% -38% has the best compatibility with PVC, which can improve impact resistance without affecting processing fluidity.
Chemical resistance and flame retardancy: CPE with high chlorine content (>50%) is suitable for anti-corrosion and flame retardant scenarios (such as chemical pipelines and fire-resistant building materials).
5. Quality control and supplier screening
Particle uniformity: Ensure that the size of CPE particles is controlled between 0.1-200 μ m to avoid clumping or poor solubility due to small particles.
Brand and Testing: Choose suppliers who provide complete quality certification (such as chlorine content testing reports, thermal stability tests), and prioritize verifying the performance of their products in the target formula (such as plasticization speed, cell uniformity). Bontecn Group China’s chlorinated polyethylene provides you with service and quality assurance.
6. Balance cost and performance
Universal CPE: Products with moderate chlorine content (35% -38%) have high cost-effectiveness and can meet most PVC modification needs.
High end scenarios: Special functional requirements (such as ultra-low density foaming and high temperature resistance) require customized formulas, which may increase cost investment.
Summary: The selection of CPE should be based on application requirements, accurately matching functional scenarios through parameters such as chlorine content, molecular weight, compatibility, etc., combined with production process validation and supplier qualification evaluation, to achieve an optimized balance between performance and cost.
Post time: Apr-30-2025
