Material pasted together, from the contact surface of the unit width of the stripping required maximum force. The peel Angle is 90 degrees or 180 degrees, and the unit is Newton/meter (N/m). It reflects the bond strength of the material.

When the thickness of the composite film reaches 0.2mm or above, the peel strength decreases. In fact, this is because the thickness of the film increases, and the Angle of 90 or 180 degrees cannot be achieved, resulting in inconsistent measurement conditions. The peeling speed also affects the peeling strength to some extent.

Influence of composite film on peeling strength:

1. melt index (MI) is an index of resin fluidity, generally speaking, the higher the melt index (MI) of the resin, the better the fluidity, the lower the viscosity of the molten film, the greater the adhesive force. The melting index (MI) of the resin is small, its molecular weight is larger, the fusion is relatively poor, and can not be coated substrate adhesion, resulting in a decline in the peel fastness.

2. The smaller the density of the resin, the higher the content of the branch chain, the easier the surface is to be activated, the greater the adhesion force, and the more favorable it is to improve the peeling strength.

3. The additives in the resin, especially the lubricant, have a great influence on the peeling strength of the extrusion composite film.