Benefits of coating
The coating of a piece of chewing gum has numerous functions and benefits, and also provides a number of opportunities. One of the most important functions is to provide a strong taste sensation and crunchiness as soon as the consumer starts chewing the gum. The coating consists mainly of sweeteners and flavours, which are quickly dissolved during chewing. The result is a strong taste explosion after just a few seconds. Colours can also be added to the coating, offering exciting branding opportunities. For additional functional effects, active ingredients can also be incorporated into the coating.
Finally, the coating delays oxidation of the gum base and other ingredients at the core, thereby prolonging the shelf life and freshness of the product.
Coating techniques
The coating of a chewing gum forms an outer shell comprised mainly of water, sweeteners and flavours. The shell can consist of up to 50 layers, which must each dry before the next can be applied. This process takes several hours and requires constant electronic monitoring of temperature and air humidity.
Coating sweeteners
A variety of sweeteners are available for chewing gum coatings. Some of the best known coatings are maltitol, isomalt, xylitol, sorbitol, sugar and dextrose, which each have different effects and functionality, such as sweetening power, crunchiness, flavour release and climatic stability.