Crosslinking Systems for High-Temperature Silicone Pressure-Sensitive Adhesives: Types and Differences

The upper performance limit of Jiangsu Aokai’s Teflon high-temperature tapes is essentially determined by the crosslinking and curing system of the high-temperature silicone pressure-sensitive adhesive used in the coating. In the production process of Aokai’s high-temperature Teflon tapes, there are two mainstream systems: peroxide crosslinking and platinum-catalyzed addition. These two systems have a decisive influence on the temperature resistance, cleanliness and production efficiency of high-temperature Teflon tapes.

1. Peroxide Crosslinked High-Temperature Teflon Tapes

In early-stage and general-purpose high-temperature Teflon tapes, free radical crosslinking initiated by peroxides is commonly adopted. This type of high-temperature Teflon tape requires a high-temperature oven above 150°C, resulting in relatively high energy consumption.

Performance Characteristics:Teflon high-temperature tapes produced under this system carry trace byproduct residues from the reaction. During long-term high-temperature service, the adhesive layer carries a slight risk of yellowing, and the stability of peel strength is relatively inferior.

Application Scenarios:Such high-temperature Teflon tapes are more suitable for industrial anti-stick applications and general heat-sealing uses where there are no special requirements for optical clarity and cost sensitivity is a priority.

2. Platinum-Catalyzed Addition High-Temperature Teflon Tapes

High-end and high-cleanliness high-temperature Teflon tapes are generally upgraded to the platinum-catalyzed hydrosilylation addition system. This is critical for high-temperature Teflon tapes requiring precise release force control.

Core Advantages:High-temperature Teflon tapes using the platinum system can be rapidly cured at 100–130°C, greatly improving coating efficiency. Since no byproducts are generated, the adhesive layer is pure and transparent. During long-term service at 260°C, the adhesive residue rate is extremely low, and it will not corrode bonded electronic components.

Process Limitations:During production, the workshop environment and Teflon base fabric must be extremely clean. Otherwise, trace impurities can easily poison the platinum catalyst, leading to incomplete curing or loss of adhesion.

3. Differential Effects of Crosslinking Methods on Teflon High-Temperature Tape Performance

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In summary, whether used for heat sealer anti-stick applications or cable insulation wrapping, understanding the crosslinking system of the silicone pressure-sensitive adhesive on high-temperature Teflon tapes directly determines actual performance under extreme working conditions.For high-end precision processes, platinum-catalyzed high-temperature Teflon tapes are strongly recommended. For general heat-resistant masking applications, peroxide-based systems can be selected.

The above information is provided by Jiangsu Aokai New Material Technology Co., Ltd.

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