The foaming regulator produced by Bontecn Group China directly affects the formation, stability, and final structure of foam pores by regulating the properties of polymer melts. The specific manifestations are as follows:
1. Uniformity and refinement of foam pores
Enhance the strength and elasticity of the melt, promote uniform distribution of gas in the PVC melt, form independent micropores (diameter 0.1-0.5mm), and reduce the problem of bubble merging or coarsening. At the same time, optimize the cohesion of the melt to ensure that the cell walls can withstand gas pressure and maintain the stability of the closed cell structure.
2. Cell density and size control
The dosage needs to be accurately matched: too low (<4phr) leads to insufficient melt strength, causing bubble rupture or surface collapse; If it is too high (>8phr), it will excessively strengthen the melt, suppress the expansion of bubbles, and instead increase the density of the product. The higher the molecular weight (such as 530 model), the finer the pores and lower the density, but it is sensitive to processing temperature.
3. Defect prevention and structural optimization
To prevent abnormal bubbles (such as elongated bubbles or fish eyes), it is necessary to coordinate the lubrication system and process temperature: excessive external sliding will reduce the melt pressure and induce local density unevenness; Temperature fluctuations of ± 5 ℃ may disrupt the uniformity of the pores and require the addition of modifiers such as zinc stearate for calibration.
4. Dynamic adaptability
The choice of model (such as KF-100) for different types of products (such as hard PVC sheets or soft shoe materials) directly affects the pore structure: for soft products, a special regulator is needed to avoid skin blistering and improve tactile elasticity.
Post time: Aug-02-2025
