In recent years, the traditional metal and glass contai […]
In recent years, the traditional metal and glass containers in the daily chemical industry have gradually been replaced by lightweight plastic hose packaging. For the reason, we can find that the aluminum-plastic composite hose has the following advantages: The aluminum-plastic composite hose is hygienic and convenient, and the surface color is used. Bright and bright, it is widely used in the packaging of cream cosmetics, such as facial cleanser, hair conditioner, hair dye, toothpaste and other products in the cosmetics industry, as well as creams and ointments for the pharmaceutical industry. package. So what is the difference between aluminum-plastic pipe, PE pipe and PP?
From the connection point of view, the aluminum-plastic pipe adopts a physical connection, which is simple and convenient, and its safety and reliability are very high unless it is improperly operated. PE pipe and PP-R pipe adopt hot melt or electric fusion connection. The process is complicated, and it is easy to produce the defect area of the pile, which leads to stress concentration and affects the long-term performance of the pipe. In addition, the local high temperature of the electric fuse easily promotes the degradation of the pipe material. Accelerate pipe aging.
From the perspective of aging resistance, the molecular structure of the aluminum-plastic tube is stable, the inner and outer layers of PE are separated, and the outer layer allows the addition of sufficient anti-light and anti-oxidation stabilizers without affecting the inner layer hygiene of the contact water, and the intermediate aluminum layer of the aluminum-plastic tube The inner and outer layers are isolated, and the outer plastic allows the addition of a stabilizer sufficient to resist light and oxygen aging without affecting the inner layer hygiene of the contact water, thereby enhancing its anti-aging property; the molecular structure of the PE tube is stable, but the single layer structure is not favorable for The addition of stabilizers can easily lead to secondary pollution of water in the pipeline: PP-R tubes contain the most unstable tertiary carbon atoms and are susceptible to aging by light, oxygen and impurities.
From the perspective of long-term hygienic performance, the inner and outer layers of the aluminum-plastic tube are made of special polyethylene material, which is clean and non-toxic. The most important thing is that the aluminum layer in the middle of the aluminum-plastic tube is insulated from oxygen, which is not easy to cause the growth of the emblem organism and the algae plant. Generally, the outer layer PE allows the addition of antioxidants, which will not cause the inner layer water pollution: the PE tube and the PP-R tube cannot block the oxygen. It is easy to cause the proliferation of microorganisms and algae, affecting the sanitation of drinking water, and contains a large number of antioxidants, which may cause water pollution. From the perspective of high temperature resistance, the long-term use temperature specified by the national standard for aluminum-plastic pipes is 95 ° C, and the maximum service temperature is 1100 ° C, which can fully meet the needs of domestic water, and the thermal expansion coefficient of aluminum-plastic pipe is small, and the deformation amount is affected by temperature change.
The performance of PE pipe decreases rapidly with the increase of temperature, and is limited to cold water transportation: the long-term use temperature specified by the national standard of PP-R pipe is 70 ° C. The maximum service temperature is 95 ° C. There is a certain use in the use of hot water pipe. limitation.