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Material Solutions for Self-Limiting Heaters

Available from DuPont Microcircuit Materials

Polymer thick film materials and PTC carbon resistors from DuPont are helping to enhance performance and safety for OEMs and auto drivers.

With a wide array of material solutions for self-limiting heaters, DuPont offers the most cost-effective and high-performing option for creators of self-limiting resistive-based heating systems. Auto OEMs depend on material solutions from DuPont for a wide variety of applications where low temperature, controlled thermal gradients, uniform heating and localized temperature control are crucial, without requiring complex electronic controllers or feedback loops.

The unique positive thermal coefficient of resistance (PTC) carbon compositions, coupled with high conductivity polymer thick film (PTF) silver conductors, along with industry-leading system compatibility at both substrate level (PET, PEN, polyimide) and adhesive layers deliver a self-limiting heater solution that is both reliable and simple.

The PTC carbon compositions generate resistive heat up to a specific temperature. Due to their molecular nature, they are not able to surpass this threshold. The total thermal mass of the system is determined by the shape, size, number and distribution of each individual printed heater element. Because each single resistive element is self-limiting, once the equilibrium temperature is reached, heat will only be applied where it’s necessary without complicated electronic controllers or feedback loops.

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