PVC Why is the garden tube turned black?

PVC Why is the garden tube turned black?

Life, you may smell the smelly smell of PVC garden pipes. We must be very familiar with the PVC hose, which is used in many places in our life, such as. home cleaning, home car washing, delivery of gas and dust, garden watering and other places. But some just buy PVC hose in the sun for two days will find the black and smelly smell, why can this bad situation happen?

Before we understand this, let is get familiar with the elements of PVC garden tube.

PVC The garden tube formulation mainly consists of PVC resin and additives. According to the functions, the additives are divided into: heat stabilizer, lubricant, processing modifier, impact modifier, filler, aging resistance agent, colorant and so on. Let is analyze why some PVC garden pipes are black and smelly from the raw materials of PVC garden tubes. CPE as PVC toughening material is still used by most manufacturers, but CPE chlorinated polyethylene, due to the characteristics of its structure, is easy to decompose under the action of light heat and oxygen, making the pipe yellow. In addition, more mainly is the decomposition of CPE to produce HCL easily react with lead salt stabilizer into PbCl ₂. Pb (ClS) ₂ and PbS are easily generated under the sulfur pollution environment, which will make the pipe become reddish brown and black.