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Microwave Susceptors

Microwave Susceptors are used to provide additional thermal heating on the outside of food articles that are heated in a Microwave Oven.

Microwave Susceptors are typically aluminum metallized Polyester (PET) sheets, whereas the aluminum is deposited with very low thickness. This gives the aluminum layer a grayish appearance. The thin layer of aluminum absorbs part of the microwave energy creating currents in the metal. Since the thickness is low and the resulting resistivity is high the currents are limited, so they do not cause any arcing or sparking as would be observed with metallic articles in the microwave. The currents are, however, high enough to heat the susceptor to a temperature of about  120°C (~ 250F). This temperature is high enough to make food crispy on the outside and cause corn kernels to pop.

Patterned Susceptors allow to create heat profiles that meet the demand of the specific food item. A perfect example is a Pizza Pie, that - without a susceptor - becomes hot and easily overcooked on the outside while the center typically stays cold. With a patterned susceptor more heating energy can be directed towards the middle of the pie, creating even heating all across the pizza.

Susceptor Patterns are manifold and can be developed for your particular need.

Patterned Microwave Susceptors for a large range of food packaging applications

How does a Microwave Susceptor work and why does it needs to be patterned?



Value Added Surface Technology