Pressure Sensitive Liner ( PS22 ) usually called "pressure sensing liner" and it’s made by foamed PS with backing pressure-sensitive adhesive.
Pressure Sensitive Liner is popular used for glass, metal and plastic container or bottle sealing. You just simply screw up the cap and the liner will feel the pressure and sealed the bottle automatically.
Best use for sealing the container with solid staff, dry food and pharmaceutical packaging. Custom back prints Logo or image is available.