1. The hose is divided into single-layer, double-layer and five-layer hoses, which are different in pressure prevention, impermeability and hand feeling, such as the outer layer, the inner layer and the two adhesive layers. Barrier layer. Features: It has excellent gas barrier properties, can effectively prevent the infiltration of oxygen and odor gas, and prevent the fragrance of the contents and the leakage of active ingredients.
2.Double-layer tube is more common, can be used in the middle and low-grade single layer, the hose diameter is 13-60 kinds of caliber, when a certain diameter of the hose is selected, different capacity characteristics are marked with different lengths, capacity 3ml - 360ml can be adjusted, for aesthetic coordination, 60ml below the commonly used 35 or less caliber, 100ml, 150ml usually use 35-45 caliber, 150ml or more capacity requires 45# or more caliber.