Technical indicators of release paper
Feb 23, 2021
The technical indicators of release paper are as follows: dry silicon coating amount, normal temperature peeling force, aging peeling force and residual adhesion rate.
The dry silicon coating amount refers to the amount of release agent coated on the material, and the unit is grams per square meter. Generally, the coating amount of solvent-based silicone oil ranges from 0.30 to 0.80 grams per square meter, and the coating amount of solvent-free silicone oil ranges from 0.80 to 1.30 grams per square meter. Professional testing equipment is required to test the coating amount.
The amount of silicone oil coating directly affects the peeling performance. The higher coating amount can cover the base paper densely and ensure the uniform distribution of silicone oil. However, the lower the amount of silicone oil coating, it is prone to leakage and other phenomena, resulting in poor peeling. Some release coating suppliers reduce the amount of silicone oil coating, resulting in heavy peeling and producing heavy release paper, which is quite risky during use. A reliable manufacturer realizes the adjustment of the peel force through the adjustment of the chemical formula without reducing the amount of silicone oil applied. This is a long-term accumulation of technology, rather than one overnight.
Peel force at room temperature, the peel force data obtained through standard test methods at room temperature, the unit is N/25mm, how many grams can be converted into.
Generally 0.10N/25mm, that is, the peeling force below 10g, commonly known as light peeling;
0.20N/25mm, that is, the peeling force below 20 grams, commonly known as medium peeling;
0.35~0.45N/25mm, that is 35~45 grams of peeling force, commonly known as heavy peeling;
0.60~0.80N/25mm, that is 60~80 grams of peeling force, commonly known as heavy peeling;
Of course there is also 0.03~0.04N/25mm, which is a peeling force of 3~4 grams, commonly known as light peeling;
It also has a peel strength of 1.00N/25mm, which is more than 100 grams, commonly known as overweight peeling.
Aging peel force, the peel force data measured after aging is generally slightly larger than the normal temperature peel force.
The residual adhesion rate refers to the force of the release paper after the first peeling and the second peeling. The calculated data mainly reflects the curing effect of the silicone oil.
