What is the main reason why the peeling force of silicone release paper decreases after aging?

The main reason why the peeling force of silicone release paper decreases after aging mainly involves changes in the physical and chemical properties of the silicone material. Specifically, there are the following factors:

Breakage of chemical bonds: Over time, the chemical bonds in silica gel may break due to the influence of environmental factors (such as high temperature, humidity, light, etc.), resulting in changes in the molecular structure of silica gel, thereby affecting its peeling performance.

Reduction in cross-linking density: The peeling performance of silicone release paper is closely related to its internal cross-linking density. During the aging process, the cross-linking density of silica gel may decrease, causing its structure to become loose, resulting in a decrease in peeling force.

Pollution and oxidation of the silicone surface: The surface of the silicone may be adhered to by pollutants such as dust, oil, or undergo oxidation reactions under the action of oxygen. These will cause the properties of the silicone surface to change and affect the relationship between it and the material to be stripped. interaction, resulting in a reduction in peeling force.

Degradation of physical properties: During the aging process, silicone may experience physical property degradation such as reduced elasticity and increased hardness. These changes will affect the peeling performance of silicone release paper.

Different types of silicone release papers and different usage environments may have different aging mechanisms and reasons for the decrease in peeling force. In practical applications, analysis and evaluation need to be carried out based on specific products and usage environments.