Distinguishing pipe material: high-quality aluminum-plastic pipe is a 5-layer wrapping structure, there is a layer of hot sol between polyethylene and aluminum pipe, and the two layers cannot be peeled off; inferior aluminum-plastic pipe is a three-layer structure, and there is no heat between aluminum and polyethylene. Melt glue, easy to peel off by hand. From the point of view of processing technology, high-quality aluminum-plastic pipes are finely processed, and the text on the outside of the pipe is printed by inkjet; inferior aluminum-plastic pipes are often very cheap, because they are made of ordinary non-high-density polyethylene materials, and the text on the outside of the pipe, Printed by ordinary typewriter, the handwriting is fuzzy.
