1、 Deterioration of processing performance
Plasticization abnormality: The amount of inferior CPE added needs to be increased to achieve the expected impact resistance effect, resulting in prolonged plasticization time, torque imbalance, and affecting production efficiency. The calcium particles in adulterated CPE are difficult to plasticize, resulting in white spots or pockmarks on the surface of the product (such as electrical conduit).
Decreased fluidity: Excessive filling (such as calcium carbonate) reduces the purity of CPE, destroys the uniformity of the melt, deteriorates fluidity during extrusion or injection molding, and increases equipment load.
2、 Product quality defects
Mechanical performance degradation: Insufficient effective modified components in inferior CPE significantly reduce the impact strength and flexibility of PVC products, making them prone to brittle fracture. The tensile strength decreases due to the destruction of CPE molecular structure or interference from fillers (calcium powder weakens intermolecular forces).
Deterioration of apparent quality: adulteration of calcium powder leads to a decrease in surface glossiness and an increase in color difference of profiles/pipes, resulting in the appearance of spots or stripes.
Uneven dispersion of fillers (due to density differences) results in significant fluctuations in the performance of products from the same batch.
Durability damage: Poor quality CPE has insufficient weather resistance and thermal stability (abnormal chlorine content or catalytic decomposition of impurities), accelerating product aging and yellowing.
3、 Increased production costs
Forced increase in usage: To compensate for performance loss, an additional 20% -30% of inferior CPE needs to be added, which actually increases raw material costs.
Rising scrap rate: Abnormal processing and performance fluctuations lead to a 5% -10% increase in scrap rate, and repeated production wastes energy and labor hours.
Hidden costs: Equipment wear and tear intensifies (due to abnormal torque), and frequent adjustment of process parameters is required, increasing management difficulty.
4、 Hidden hazards of adulterated CPE
Cost reduction due to adulteration → insufficient performance → incremental use → process loss of control → sharp increase in waste → actual cost rebound
Choosing regular CPE with stable chlorine content (35% -38%) and no illegal filling is the core to ensure PVC processing efficiency and product quality. Shandong Bangtai Petrochemical (Group) Co., Ltd. has a professional production technology team to safeguard the quality of your products.
Post time: Jun-07-2025
