CHICAGO (July 17, 1:05 p.m. EDT) — Plastics that change color when hot can lead to safer products, according to LNP Engineering Plastics. At NPE 2000 in Chicago, LNP debuted Colorcomp compounds, which change color when a certain temperature is reached. They can provide safety features in items such as infant feeding spoons, tea kettles, auto radiator shrouds and medical devices.
In a radiator shroud, for example, the word "hot" can be molded into the shroud and the word will turn red when the radiator is hot.
The Exton, Pa., firm said it makes Colorcomp by adding thermochromic pigments to low-temperature resins such as polypropylene and thermoplastic elastomers. Customers can specify what color the plastic will appear before and after exposure to heat.