Publish Time: 2022-11-01 Origin: Site
Why are food grade silicone hoses prone to bubbles?
There has always been a problem of bubble generation in silicone tubings. Precipitated silicone hoses are not easy to generate bubbles, and gas-phase silicone tubings are easy to produce bubbles, which is determined by the rubber material. The produced food-grade silicone tubing produces air bubbles, which has a great impact on the appearance of the entire silicone hose and the quality of the product. So what are the reasons for the bubbles in the food grade silicone hose?
1. It may be a raw material problem, the transparent white carbon black is not pure or mixed with other white carbon black. In response to the problem of raw materials, what we can improve is to choose transparent white carbon black with better purity. After the kneader is cleaned, the transparent rubber compound is kneaded. It is necessary to improve from the two aspects of the raw material itself and the external materials.
2. It may be the problem of rubber mixing, the mixing of rubber materials is uneven, the filling capacity is unreasonable, and the temperature and time of rubber mixing are not well controlled. For the problem of rubber mixing process, what we need to do is to control the temperature of rubber mixing, control the mixing time, extend the original mixing time by 5-10 minutes, and then discharge the glue for inspection.
3. The thickness of the silicone tube may be too thick, and it is easy to cause air bubbles.