BOPP film and method of making the same

A multi-layer film, comprising:

• a core layer having a first side and a second side opposite the first side, wherein the core layer comprises a polymer;
• a first intermediate layer disposed on the first side of the core layer;
• a second intermediate layer disposed on the second side of the core layer;
• a first skin layer disposed on the first intermediate layer and arranged such that the first intermediate layer is disposed between the core layer and the first skin layer;
• and
• a second skin layer disposed on the second intermediate layer and arranged such that the second intermediate layer is disposed between the core layer and the second skin layer,
• wherein the core layer has a thickness that is greater than thickness of the first or the second intermediate layers or the skin layer,
• wherein the core layer includes polybutylene terephthalate (PBT) particles disposed therein,
• wherein the amount of PBT particles ranges from about 1 to about 10 percent by weight (wt %), based on the total weight of the core layer,
• wherein the PBT particles have an average particle size from 2 μm to less than 4 μm,
• wherein the multi-layer film has a thickness ranging from about 28 microns to about 38 microns,
• wherein the core layer has a thickness ranging from about 20 microns to about 29 microns, and
• wherein the multi-layer film has a first surface having a gloss ranging from about 60 to about 80, where the gloss is measured by ASTM D2457 at an angle of 45°, and
• wherein the multi-layer film has a Z tear interfacial layer force in a range from about 422 g/in to about 1180 g/in.