Paper Cup Heat Sealing & Body Forming: Solid Seams, No Leaks

Whether paper cups hold liquid without leaking and hot drinks without warping depends on heat sealing and body forming. Temperature, pressure, and time control for coated-paper sealing are key.

The Scenario: Three Difficulties in Heat Sealing and Forming

Paper cup heat sealing is hard in three ways:

Pain Points

• Sealing temperature too low or too high—seams weak or scorched;
• Uneven body forming—hurts nesting and lid fit;
• Uneven coating causes localized leakage.

The Solution: Three Process Control Points

Paper cup heat sealing and forming has three points:

1. Sealing temperature control. Precisely control temperature per coating material for solid seams.

2. Sealing pressure and time. Adjust pressure and time for even sealing.

3. Body forming precision. Control body roundness for proper nesting and lid fit.

The Result: Solid Seams, No Leaks

With heat sealing and forming done right, cups have solid seams and round bodies—no leaks with hot or cold drinks.