Rubber band Rubber band A rubber band (also known as an elastic band, gum band or lacky band) is a loop of rubber, usually ring shaped, and commonly used to hold multiple objects together. The rubber band was patented in England on March 17, 1845, by Stephen Perry. Most rubber bands are manufactured out of natural rubber or, especially at larger sizes, elastomer, and are sold in a variety of sizes. Rubber bands are made by extruding the rubber into a long tube to provide its general shape, putting the tubes on mandrels, curing the rubber with heat, and then slicing it
Rubber band and cooling causes expansion. Stretching a rubber band will cause it to release heat, while releasing it after it has been stretched will make it absorb heat, causing its surroundings to become a little cooler. This effect is due to the higher entropy of the unstressed state, which is more entangled and therefore has more states available. In other words, the ability to convert thermal energy into work while the rubber relaxes is allowed by the higher entropy of the relaxed state. The result is that a rubber band behaves somewhat like an ideal monatomic gas inasmuch as (to good