Container closure wth liner and method of producing the same

Abstract

A container closure comprising a container closure shell and a resin liner applied to the inner surface side of the shell, wherein the resin liner is constituted by an upper layer portion which is composed of a resin composition containing such additives as disoxidation agent, drying agent, deodorant, antibacterial agent and thermo color agent and which forms a panel portion on the inside of the hermetically sealing portion, a lower layer portion which is composed of a thermoplastic resin having cushioning property and elasticity and which is interposed between the upper layer portion and the top surface of the shell to join them together, and a hermetically sealing portion which is formed on the outer peripheral side of the panel portion integrally with the lower layer portion. There is further provided a container closure with liner of the function separation type which is free from defects inherent in the conventional function addition-type container closures with liner, and which permits additional functions to be exhibited to a high degree without impairing hermetically sealing property, and a method of producing the same. Moreover, there is provided a method of producing the container closure with liner of the function separation type maintaining excellent produceability and high quality.