A Quick Guide to Fluorine Release Films

Fluorine release films, also known as fluorine-coated films or fluorine films, are primarily used to prevent sticky materials-such as silicone tape or PI tape-from adhering to unwanted surfaces. During production, storage, or transportation, fluorine release films protect adhesives from contamination or degradation. They are widely used as carriers for tapes or adhesive-coated products.

The technical specifications of fluorine release films typically focus on peel strength at room temperature, residual adhesion rate, and aged peel strength.

1. Peel Strength at Room Temperature

This refers to the force required to peel the film from an adhesive surface under standard testing conditions. The results are expressed in Newtons per 25mm (N/25mm), which can also be converted to grams.

Peel strength below 0.10N/25mm (approximately 10 grams) is considered light peel.

Peel strength between 0.03 and 0.04N/25mm (about 3–4 grams) is often called ultra-light peel.

Peel strength below 0.20N/25mm (about 20 grams) is categorized as medium peel.

Peel strength between 0.35 and 0.45N/25mm (about 35–45 grams) is commonly referred to as heavy peel.

Peel strength between 0.60 and 0.80N/25mm (about 60–80 grams) is called extra-heavy peel.

Peel strength exceeding 1.00N/25mm (over 100 grams) is termed ultra-heavy peel.

2. Residual Adhesion Rate

This measures the force required for a second peel after the initial peeling process. Calculations are performed to determine how much adhesive strength remains after the first peel, which is particularly relevant for Teflon high-temperature tapes.

3. Aged Peel Strength

This refers to the peel strength measured after the fluorine release film has been bonded to a product or tape for a specific period or subjected to elevated temperatures. Generally, aged peel strength is slightly higher than the peel strength measured at room temperature.