28mm standard PE plastic bottle caps

①Sealing structure: no gasket cover from inside to top to
There are three external sealing structures, which are the sealing ring, the top sealing ring and the side sealing ring.(NO.1 PICTURE)
②Sealing principle: After capping, the sealing ring goes deep into the bottle mouth
Inside, there are serrated annular protrusions on the outside of the sealing ring, so that the
The sealing ring is in close contact with the bottle mouth. The top sealing ring is pressed on the bottle mouth
on flat surface. The side sealing ring surrounds the outside of the top of the bottle mouth. secret
The seal ring plays the role of the main seal; the top seal ring and the side seal ring play the role of the main seal;
Auxiliary sealing action
③Description: The three-way sealing structure design ensures that the beverage is squeezed and collided during handling or transportation without leakage and deterioration.