Silicone foamed products are used more and more widely in industry. They belong to the closed-cell foam structure. This structure can effectively prevent the penetration of water vapor and has the characteristics of non-condensation. The foam material has open cells and closed cells. The difference is that people are always talking about how some foam products can see holes and some can't. Today, the staff of Shenzhen Ruiqijia manufacturer will introduce to you what is the difference between open and closed silicone foam?
Open-cell foam material (also known as connected cells): the cells of the open-cell foam material are connected to each other, or completely connected, and can pass gas or liquid in one-dimensional or three-dimensional, and the diameter of the cells is 0.5~3mm. wait.


     Closed-cell foaming material: It has an independent cell structure, and the internal cells are separated by a wall membrane and are not connected to each other. Closed-cell foam material has excellent impact resistance, resilience, softness, sound insulation, heat insulation, water resistance, steam resistance, buoyancy and so on.


     Closed-cell foaming: Observe its side section, there are many holes, squeeze it with your hands, some closed cells inside the material will be squeezed like balloons, and you can hear the bubbles popping.


     Open-cell foaming: The internal cells communicate with each other, which is a non-independent cell structure.


     Closed-cell foaming: the inner cells are separated by a wall membrane and are not connected to each other, which is an independent cell structure.


     The structure of open and closed cells of foamed silica gel is related to the type of foaming agent, and is also affected by the amount of foaming agent and the foaming process. Open-cell foam is a foam structure in which the pores are interconnected. Features of open-cell foamed silica gel: Soft and delicate to the touch. Closed-cell foamed silica gel is a microporous foam structure in which the pores are closed (as shown in Figure 2), the pores are separated from each other, and there is no ventilation between them. Closed-cell foamed silicone is characterized by good resilience and compression.



About foamed silicone, please check the details:
https://www.siliconefoam.net/product-iota-f663a,b-liquid-silicone-rubber-foam-.html