Factors affecting the quality of UPVC Profile doors and windows

In buildings, UPVC Profile doors and windows are mostly multi-cavity structures with strong corrosion resistance, but there are still quality problems. What are the factors that affect the quality of UPVC Profile doors and windows? Let's take a look with LUMEI Profile.

1. PVC resin molecule

For PVC molecules, it causes molecular weight and position distribution, and has an impact on the impact performance of low-temperature drop weight. If the molecular weight distribution is wide, it means that the polymer contains partial high molecular weight or low molecular weight. For the low part, it has an impact on the impact strength. The high part will cause uneven plasticization, which will affect the homogeneous system of the material and reduce the impact strength.

2. Filler calcium carbonate

For PVC materials, the size and amount of calcium carbonate particles affect the impact strength of the material. If calcium carbonate is added, the material cost can be reduced and the dimensional stability of the material can be improved. If the amount of calcium carbonate is small, it can achieve a reinforcing effect. At the same time, if the particle size of calcium carbonate is small, it is easy to fill the inside of the PVC, which can improve the impact strength of the material.

3. Lubricant

For the PVC formulation system, the use of lubricants and the amount of lubricant added have an impact on the impact strength. Generally speaking, internal lubricants have good compatibility with PVC, while stearic acid monoglycerides are external lubricants and have poor compatibility with PVC. In the process of processing, the PVC system can be broken out, resulting in interfacial lubrication. No matter what kind of lubricant is used, if it is excessive, it will reduce the impact strength of the material.

4. Production process factors

Extrusion and mixing equipment. For advanced extrusion and mixing equipment, the impact strength is strong, which can improve the uniformity of mixing of raw materials and additives. Moreover, the density of the mixture affects the impact strength. Therefore, in order for PVC materials to obtain suitable impact strength, the extrusion equipment needs to have good mixing and plasticizing functions.

In summary, the relevant introduction summarized by UPVC Profile manufacturers. We should choose excellent raw materials and reasonable formulas, choose advanced extrusion technology, and rational design to ensure the quality of UPVC Profile doors and windows.