How to test the sealing of PET plastic bottle cap?

There are clear requirements for the sealing performance of PET bottle caps in the testing standards. According to the different uses of bottle caps, there are different regulations on the measurement methods of gas-free caps and gas-containing caps. Without air cap, the cap should be cut off the anti-theft ring (bar), used for sealing with rated torque of not less than 1.2nm, tested with a sealing tester, pressurized to 200kPa, and maintained pressure under water for 1 minute to observe whether air leakage or trip; The gas cap is pressurized to 690kPa, and the pressure is maintained under water for 1 minute to observe whether the air leaks, and then the pressure is increased to 1207kPa, and the pressure is maintained for 1 minute to observe whether the cap is off.

The appearance of PET plastic bottle is transparent, and consumers can clearly see the products in the container, which greatly gives consumers the confidence to buy. In the innovative design of the bottle body,PET container can provide great freedom, special design can be carried out according to different requirements, so that its shape changes, and greatly improve the attractiveness of the product. PET bottles used for oral liquid are relatively common at present.