Sealing paper cups for take-aways has been the trend in Taiwan in recent years. The convenience and effects offered by the seals are well-cherished and recognized by consumers, while seals also cost a lot lesser than traditional lids. Seals also solved the problem of leakages in take-away beverages for the scooter-enthusiasts. Other than bubble tea shops and traditional breakfast shops, franchise brands like KFC and TKK also started to adopt paper cup seals for take-outs to reduce costs.

Improving Sealing Success Rate

The Flat Convex Cup is a new paper cup developed by Totempak. Its rim structure is designed in accordance with the physics behind the sealing machines, aimed to increase the contact area for sealing machines when conducting heat-presses, which provides better sealing performances. It is different from the traditional rolled-edge rim, which has heightened failure rates due to a smaller contact area.

Resolving Coating Fall-Offs from Peeling Seals

After sealing traditional paper cups, the coated film on the inside of the cup comes off easily when the consumer tries to rip off the seal, creating separation issues. The rim of Totempak's Flat Convex Cups is specially processed, and the coated film on the inside of the cup does not easily come off when trying to remove the seal. The seal breaks on the flat rim in full, making it a new breakthrough in paper cup sealing.

The Flat Convex Cup That Can Be Sealed Again

Excluding human factors, the sealing success rate of the Flat Convex Cups are close to 100%. If improper sealing was to occur due to human error, the seal can be ripped off for the cup to be sealed again (note: repeated sealing can only be done under the condition that the rim is not moistened by beverages, and the rim is not severely damaged). After sealing, traditional paper cups cannot undergo a second sealing due to severe deformation in the rolled-edge rims. However, the rims of Flat Convex Cups are designed in accordance with the physics behind sealing machines. Its fixed rolled-edge design can accommodate repeated sealing.