RALEIGH – A US-based biotechnology start-up claims to have developed ‘sustainable’ biodegradable alternatives to supra-absorbant polymers (SAPs) found in diapers that are based on corn-starch and other renewable feedstocks. The company has soaked up new investment to the sum of US$17.6 million from investment firm, Blue Hill Group (BHG) in a bid to help the global nonwovens sector improve its environmental profile.