Why is PE water supply pipe whitening



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  pe water supply pipeIt is a common water supply pipeline in home improvement. In the decoration of our home, the water supply pipe is undoubtedly very important to us. The PE water supply pipe will appear a certain degree of whitening after exposure to the sun or bending and stretching. What's going on here?

pe water supply pipe personnel profile:

1. water immersion whitening agent, long time contact with water or steam, many types of transparent PVC products present white fog appearance. Soft products are more powerful than hard products. In this case, even if the infiltrated water disappears, the stabilizer cannot recover its original shape. As long as the temperature is increased, the compatibility of the stabilizer can be restored to the transparent state.

When exposed to the sun, PVC products will also show a whitening effect. Organic tin stabilizer is not easy to white. The sulfur-containing organotin is preferred, followed by lauric acid and maleic acid. The addition of light stabilizers, sulfites and liquid composite stabilizers can avoid or reduce the whitening of PVC to a certain extent.

Stress whitening means that some parts of PVC products (such as bending creases and stretching parts) will turn white under the action of mechanical external forces (such as bending and stretching). This may be due to the change of molecular structure caused by external force, the direction of polymer molecular chain, the change of PVC density and the vacancy between some molecules, which all constitute light scattering and make PVC products look white.