Thermoplastic Compounds Change Color When Exposed To Heat

Aug. 1, 2000

New specialty thermoplastic color compounds have been developed that respond to heat by changing color. Created by adding thermochromic pigments to low-temperature resins, such as polypropylene or thermoplastic elastomers (TPEs), the novel compounds allow users to specify over a wide pallete the color displayed by the plastic before and after exposure to heat. Presently, Colorcomp thermochromic compounds can be used at temperatures ranging from about 40°F to 150°F, with the color change for a specific compound occurring over a span of about 10 Fahrenheit degrees. The color change process is reversible. The thermochromic compounds are especially well-suited for use where heat-induced color change can serve as a safety feature, such as medical devices, small appliances, electrical plugs, and even such products as infant feeding spoons.

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