What Are The Reasons For The Brittleness Of PVC Pipes Caused By Extrusion In The Raw Material Formula?

1.Excessive filling;

2.The types and quantities of impact modifiers used are generally about 30% higher in impact strength for ACR compared to CPE. When using CPE for modification, the amount used is less than 8 parts by mass, which often causes the pipe to become brittle Too many or too few stabilizers. 3.Excessive or less use of stabilizers can delay the plasticization time of the material, resulting in insufficient plasticization when the material is exported from the mold. In the formulation system, the molecules cannot fully fuse with each other, and the intermolecular structure is not firm. When the dosage is too small, it will cause degradation or decomposition of relatively low molecular weight substances in the formula system, which will damage the stability of the intermolecular structure of each component. Excessive or insufficient stabilizer dosage can easily cause a decrease in the strength of the pipe and make it brittle;

4.Excessive use of external lubricant. The compatibility between the external lubricant and the resin is poor, resulting in poor compactness and plasticization of the pipe, which leads to poor impact performance and makes the pipe brittle.