At present, aluminum-plastic pipes, PE pipes, and PP-R pipes that are commonly used in the home improvement market have large differences in performance due to differences in materials and processes.
1. From the connection mode, the aluminum plastic pipe adopts a physical connection, which is simple and convenient. Unless it is operated improperly, its safety and reliability are very high. PE and PP-R are connected by hot melt or electrofusion, and the process is complex. It is easy to produce defects in the stack, leading to stress concentration and affecting the long-term performance of the pipeline. In addition, the local high temperature of the electric fuse easily promotes the degradation of the pipeline material and accelerates the aging of the pipeline. .
2. From the perspective of long-term hygienic performance, the aluminum layer in the aluminum-plastic tube cuts off oxygen, and it is not easy to cause the growth of microorganisms and algae. Generally, the outer layer of PE allows for the addition of antioxidants, and does not cause water pollution in the inner layer. PE pipe and PP-R pipe Oxygen can not be blocked, easily lead to microbial and algal breeding, affecting the health of drinking water; and contains a large number of antioxidants, can easily lead to water pollution.
3. From the standpoint of high temperature performance, the long-term use temperature of the aluminum plastic pipe is 95°C, and the maximum service temperature is 110°C. It can fully meet the needs of domestic water use; the performance of PE pipe decreases rapidly with increasing temperature, only Confined to cold water delivery; PP-R national standard long-term use temperature is 70 °C, the maximum use temperature of 95 °C, in the use of hot water pipes have certain limitations.
4, from the aging resistance, aluminum-plastic pipe molecular structure is stable, the outer and outer layers of PE are separated, the outer layer allows to add enough anti-light, anti-oxidant stabilizer without affecting the water contact with the inner hygienic; PE pipe molecular structure is stable, However, the monolayer structure is not conducive to the addition of stabilizers, which can easily lead to secondary pollution of the water in the pipeline. The PP-R tube contains a large amount of unstable tertiary carbon atoms and is susceptible to aging by light, oxygen, and impurities.
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