How to verify heat resistance and sealing in food-service products

Hot-drink lids and food containers depend on both material and geometry. A stated heat-resistance temperature does not establish leak-free performance during transport, compression or prolonged contact, and does not replace food-contact testing.

Sample for the intended use

• Define food or drink temperature, contact time and fat content.
• Check rim dimensions, sealing features, tolerances and engagement.
• Review forming, storage, stacking and transport conditions.
• Test finished samples for deformation, sealing, opening and contact requirements.

Turn material data into product acceptance criteria

Green Free Plast can support PFM formulation, forming conditions and sample assessment. Information about 95°C heat resistance needs a specific grade, product geometry and test conditions. It should not be extended to every food-service product.

Agree on methods, temperature, duration and acceptance criteria after sampling and before trials. Existing equipment also needs assessment against the processing window; compatibility without adjustment should not be promised in advance.