Causes of air bubbles in silica gel tubes

A good silicone tube product is formed immediately after leaving the factory, meets the standard for regular use, and has a smooth surface, is durable, and can withstand multiple tests.

 

Defective silicone products cannot be recycled for production. Once molded, silicone products cannot be inverted. If a molded silicone product is defective, it faces scrap. If it has only a slight appearance defect, it can still be treated as a reworked product. Then, some silicone tubes may experience blistering after production. What is the reason?

 

There are two reasons why silicone tubes can bubble:

 

1. Raw Material Problem: It is estimated that transparent white carbon black is impure or mixed with other white carbon black.

 

2. Coking problems: uneven mixing of rubber materials, unreasonable filling capacity, and uncontrolled discharge temperature and time.

 

3. The wall thickness is too thick and the hardness is too soft.

 

Specific solutions:

 

1. For raw material issues: select transparent white carbon black with a higher purity, clean it with a kneading machine, and then refine the transparent adhesive.

 

2. For coking process issues: control the kneading temperature and time, extend the original kneading time by 5-10 minutes, and then discharge the glue for inspection.

 

3. If the wall thickness is thick, try to choose silicone raw materials with high hardness.

 

In addition, we can pay attention to the following points when storing silicone rubber tubes:

 

1. Pack well to prevent dust and oxidation.

 

2. Keep ventilated and dry to prevent mildew.

 

3. Use at a suitable temperature within a specified period of time.

 

4. Place the silicone tube at room temperature to avoid sunlight.