The qualified aluminium cap products because of according to the quality standard
1. The inside film in aluminium cap has no whitening, peel off, fall off etc phenomenon,.
2. The outside film of aluminum cap has chalkiness, whitening, blister, peel off, fall off etc phonomenon.
3. The appearance of cap can't become black. The outside film performance of aluminum cap use 20% GuSO4 liquor to soak 1 minute, and can't have obviously corrosion appearance. The sealing glue allows 35-60 scales Mg/pieces, check the production date of aluminiumm cap, and since the production date, don;t manufacturer until after 3 days. 【aluminum cap rail】
Sealing glue heat-resistant test :
put the aluminium cap into boiling water and boiling 15 minutes, sealing glue should not fall off and appear stunk phenomenon.
Open reliability experiment :
Fall off experiment :
Fall off from 2 meters high and the scribed line has no vibrated fission, ring-pull has no tripping off.
After sealing operation 121 degree, 13 minutes skill sterilization, not allow reveal.
