Ring pull closure liner

A ring pull closure liner, comprising:

• a functional layer, comprising a surface film and a bonding film sequentially from top to bottom;
• a sealing layer, located below the functional layer;
• a release layer and a strong adhesion layer, the release layer and the strong adhesion layer are located between the surface film and the sealing layer;
• and
• an electromagnetic induction heating layer, located between the surface film and the sealing layer;
• wherein the functional layer of the ring pull closure liner is provided with a main cutting line, the main cutting line divides the ring pull closure liner into an outer ring and an inner ring, and an inner side of the outer ring is surroundingly connected with an outer side of the inner ring,
• wherein the inner ring comprises:
• a lifting part;
• a lifting neck, connected with the bottom end of the lifting part;
• and
• a hollow-out area, formed by cutting a secondary cutting line, the hollow-out area is located at a periphery of the lifting part, and the hollow-out area is connected with two sides of the lifting neck;
• wherein a thickness of the hollow-out area is less than a thickness of the ring pull closure liner,
• wherein the functional layer of the ring pull closure liner is further provided with a tearing line, one end of the tearing line is connected with the lifting part, the other end of the tearing line is connected with the main cutting line, and a part of the tearing line is completely overlapped with the main cutting line, and
• the release layer and the strong adhesion layer are located on a lower surface of the bonding film corresponding to the lifting part, or are located on an upper surface or a lower surface of the electromagnetic induction heating layer.