What is silicone release paper?

Silicone release paper is a special anti-adhesive paper with silicone (silicone coating) coated on the surface. It is mainly used to isolate sticky materials (such as glue, tape, self-adhesive labels, etc.) to prevent them from sticking to other surfaces during storage or transportation.

Here is its key information:

Core structure

• Base paper: Commonly used materials are kraft paper, glassine paper (glassine) or PET film, providing basic support.
• Silicone coating: A uniform silicone layer is formed on the surface of the paper through the coating process to give it anti-adhesive properties.

Main features

• Anti-adhesiveness: The low surface energy of silicone makes it difficult to combine with adhesives, making it easy to peel off.
• Temperature resistance: It can withstand temperatures from -20℃ to 200℃, suitable for high-temperature processing environments (such as electronic component packaging).
• Chemical stability: Acid and alkali resistant, anti-oxidation, compatible with most adhesives.
• Environmental protection: Some products are recyclable or degradable, meeting environmental protection requirements.

Typical application scenarios

• Label industry: as the backing paper of self-adhesive labels, ensure that the labels are easy to tear off.
• Tape production: protect the adhesive layer of the tape and easily peel it off when using it.
• Composite material manufacturing: isolate the sticky surface in carbon fiber prepreg or insulating film.
• Medical field: used for medical tapes and band-aids to ensure sterility and easy tearing.
• Molding process: prevent the material from sticking to the mold when molding silicone rubber products.

Selection considerations

• Peeling force: select low, medium and high peeling force models according to the viscosity of the colloid.
• Substrate thickness: affects flexibility and applicable scenarios (such as thin paper is required for automatic labeling).
• Heat resistance requirements: heat-resistant silicone release paper is required for high-temperature processes.
• Surface treatment: glossy/matte coating affects the visual effect after the tape is attached.

Comparison with other release papers

• PE coated release paper: low cost, but poor temperature resistance (usually ≤80℃), suitable for ordinary tapes.
• Fluorine release paper: It has stronger anti-sticking properties and is used for extremely high-viscosity colloids, but it is expensive.

In the production of mobile phone screen protective films, silicone release paper can withstand the hot pressing process (about 150°C) during the lamination process, while ensuring that the protective film does not fall off with residual glue, which is more reliable than PE coated paper. In food packaging labels, its non-toxic properties meet direct contact standards.