Why Do Silicone Sheets Crack During Use?

Silicone sheets are known for their good elasticity, flexibility, and resistance to high and low temperatures. They are widely used in industrial production and various processing applications. However, during long-term use, some silicone sheets may develop surface cracks, edge splitting, or localized damage. These problems can affect the appearance and normal performance of the material and may also shorten its service life.

So, why do silicone sheets crack during use? Besides the properties of the material itself, what other factors can affect their performance?

1. Material Aging After Long-Term Use

Silicone has good aging resistance, but this does not mean it will never deteriorate under different working conditions. Long-term exposure to high temperatures or continuous environmental influences can gradually change the properties of the material.

As the service time increases, silicone sheets may lose some of their original elasticity and flexibility. When subjected to bending, stretching, or external forces, surface cracks may begin to appear. Therefore, selecting silicone sheets suitable for the actual working environment and regularly checking their condition can help reduce problems caused by material aging.

2. Unsuitable Operating Temperatures

Operating temperature is an important factor affecting the service life of silicone sheets. Although silicone offers good resistance to both high and low temperatures, the applicable temperature range varies depending on the formulation and quality of the silicone material.

If silicone sheets are continuously used beyond their recommended temperature range, their physical and mechanical properties may gradually change, affecting their original elasticity and flexibility. In addition, frequent temperature fluctuations can cause repeated thermal expansion and contraction, which may increase material fatigue over time.

When selecting silicone sheets, it is important to consider not only the general temperature resistance of silicone but also the actual operating temperature and duration of use.

3. Fatigue Caused by Repeated Bending and Stretching

During use, silicone sheets may be subjected to different degrees of bending, stretching, compression, and external pressure. In applications involving repeated deformation, the material continuously experiences mechanical stress.

If silicone sheets remain under excessive deformation for extended periods, or if certain areas are consistently subjected to uneven forces, material fatigue may gradually develop. As the number of operating cycles increases, minor damage may eventually develop into visible cracks.

Therefore, in addition to considering the initial elasticity of silicone sheets, it is important to evaluate their actual deformation and stress conditions during use. Avoiding deformation beyond the material's capabilities can help reduce the risk of cracking.

4. Improper Installation or External Damage

Cracking is not always caused by the material itself. Installation methods and daily handling can also contribute to the problem.

For example, excessive stretching during installation or uneven fixing may cause certain areas to remain under excessive stress. In addition, sharp objects may scratch the surface, damage the edges, or create small cuts. Localized pressure during operation can also damage the material. These damaged areas may become starting points for cracks.

Therefore, sharp objects should be kept away from silicone sheets during installation and use. Proper positioning and installation are also important to prevent unnecessary stretching and localized damage.

5. How to Reduce the Risk of Silicone Sheet Cracking

Preventing silicone sheet cracking requires attention to both product selection and daily use.

First, select silicone sheets according to the actual working environment. Consider factors such as hardness, thickness, elasticity, tear strength, and operating temperature rather than focusing on just one specification.

Second, avoid prolonged operation at excessive temperatures and prevent unnecessary deformation. Proper installation is equally important to minimize uneven stress and localized damage.

Regular inspection of the surface and edges is also recommended. If small cracks, signs of aging, or localized damage are found, the cause should be identified promptly to prevent the damage from spreading.

6. DIAO Industrial Silicone Sheets

DIAO (Hebei Diao Rubber Products Co., Ltd.) specializes in the production of industrial silicone sheets and offers various specifications to meet different customer requirements.

For customized products, DIAO provides options in different hardness levels, thicknesses, widths, lengths, and colors. Cutting and processing according to drawings or samples are also available. By providing information about the intended application and performance requirements before purchasing, customers can select silicone sheets with more suitable specifications.