How To Solve The Yellowing Problem Of PVC Panels?

How to solve the yellowing problem of PVC panels?

What is a PVC panel? I believe everyone is familiar with the ceiling material of PVC panel manufacturers. It is made of PVC resin as the base material, adding a certain amount of antioxidants, modifiers and other additives, through mixing, calendering, vacuum blister and other processes. It will not be explained here. Go straight.

Many manufacturers will encounter some problems in the process of producing PVC panels. Hunan Paixin Chemical will show you why PVC panel manufacturers turn yellow during the production process. How to solve the yellowing problem of PVC?

1. Raw materials

The main raw material of PVC panel manufacturers is PVC resin, which is extremely sensitive to heat. When the heating temperature reaches above 90, a slight thermal decomposition reaction will occur. When the temperature rises to 120, the decomposition reaction intensifies. At 150 and 10 minutes, the PVC resin gradually changed from white to yellow-red-brown-black.

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2. Production process issues

During the extrusion process, the PVC is heated and sheared by the screw and barrel. If the process is not set properly, PVC will decompose and turn yellow to a certain extent.

Solution:

1. The yellowing phenomenon can be improved by appropriately reducing the temperature of the barrel.

2. Reduce the speed of the main engine within an appropriate range and increase the feed ratio, which can reduce the shear force, make the material in the spiral groove more uniform, and give full play to the role of stabilizer, thereby reducing yellowing.