There’s a scientific reason for the Sun Chips bag’s loudness: the new polymers used in the biodegradable bag has a high glass transition temperature (the temperature when polymers move from a hard state to a rubbery state). That translates into a highly crispy-sounding bag.Click to see full answer. Just so, why are chip bags so loud?According to a leading scientist, manufacturers deliberately make the packaging loud because the chips taste fresher if you can hear the rustle. The sound of the packaging matters and atmospheric sounds matter.” He found that the noisy chip packet raises expectations about the taste experience to come.One may also ask, what are Sun chip bags made of? In April 2008, Frito Lay introduced compostable packaging for the SunChips product line. The bag is made of plant-based material. It will break down within 14 weeks in a hot, active compost pile. One may also ask, are Sun chip bags still biodegradable? Recently, Frito-Lay pulled its biodegradable SunChips packaging from store shelves less than a year after its debut. The razor-thin layer of adhesive reduced the bags’ sound to about 70 decibels – about the same as other chip bags and the original SunChips bags.What happened to SunChips?By 2006, PepsiCo had made progress on a compostable bag that would decompose quickly. PepsiCo launched the compostable bag for its SunChips product, which the company had positioned as a healthy snack. Made of biodegradable plant material instead of plastic, the bag looked great. It stored chips fine.