POLYESTERS AND THEIR USE IN COMPOSTABLE PRODUCTS SUCH AS DISPOSABLE DIAPERS

摘要

2100795 9213020 PCTABS00014 The invention provides novel polyesters, fibers and films, nonwovens from the fibers and disposable products of the polyesters such as diapers. The products are degradable under the conditions typically existing in waste composting processes, have low ingredient costs and yet provide strength and toughness properties adequate for end uses such as in disposable diapers. The polyesters are based upon polyethylene terephthalate copolymerized with a polyethylene glycol and a monomer containing an alkali metal or alkaline earth metal sulpho group, if desired, a polyethylene ether such as diethylene glycol, and an aliphatic hydroxycarboxylic acid.