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русскийSilicone release paper is engineered to act as a non-stick surface between adhesive materials and other substrates. Its ability to prevent sticking lies in the unique chemical and physical properties of its silicone-coated layer, which creates a barrier that resists adhesion—even against aggressive pressure-sensitive adhesives (PSAs), resins, or sealants. Here's a detailed explanation of how this works:
1. The Role of Silicone Coating
The key to the non-stick function of silicone release paper is the application of a thin, uniform layer of cured silicone polymer (usually polydimethylsiloxane or PDMS) on one or both sides of a base paper (such as glassine, kraft, or polyethylene-coated paper).
Why silicone?
Silicone has an extremely low surface energy, typically in the range of 20–24 dyn/cm. This means most materials—including glues and adhesives—find it difficult to "wet" or adhere to the surface. In contrast, common adhesives are designed to bond to surfaces with higher surface energy (like plastic, metal, or untreated paper).
2. Crosslinked Silicone Network
During the manufacturing process, the silicone coating undergoes a curing or crosslinking reaction, typically catalyzed by heat or UV light. This process transforms the liquid silicone into a solid, elastic network firmly bonded to the paper’s surface.
The cured layer remains chemically inert and non-reactive, even when exposed to aggressive adhesives or temperature changes.
It provides a smooth, flexible surface that allows adhesives to sit on top without seeping into the paper or bonding permanently.
3. Controlled Release Force
Silicone release papers are available in different release levels—low, medium, or high—depending on the required "peel strength" or release force needed to remove the adhesive-backed material.
A low-release liner allows the adhesive material to be peeled off very easily.
A high-release liner may require more force, often used when the adhesive is very aggressive or the application involves precision alignment.
Manufacturers adjust the silicone formulation, curing conditions, and coating thickness to control the release force based on the end-use requirement.
4. Maintaining Adhesive Performance
One of the most important benefits of silicone release paper is that it allows adhesives to retain their original bonding properties until they are applied to the intended surface.
It prevents premature bonding or contamination.
It protects the adhesive from dust, moisture, and environmental exposure.
When peeled, it leaves no residue behind, ensuring clean transfer of the adhesive.
5. Double-Sided vs. Single-Sided Coating
Single-sided silicone paper is used when only one adhesive side needs protection (e.g., labels or stickers).
Double-sided silicone paper is used for materials that require protection on both sides, such as double-sided tapes or laminated adhesives.
In both cases, the silicone layer acts as a barrier that prevents unwanted bonding and facilitates clean, efficient application.
Conclusion
Silicone release paper prevents materials from sticking by utilizing a cured silicone surface with ultra-low surface energy, designed to resist adhesion without contaminating or damaging the adhesive material. Whether used in pressure-sensitive labels, medical patches, composite prepregs, or industrial tapes, this specialized paper ensures clean release, precise handling, and consistent performance. It is an essential component in modern adhesive and lamination processes across a wide range of industries.
