A process for producing an apertured nonwoven fabric combines one or two outer nonwoven layer(s) with a layer of polymeric material having a lower melting temperature and a property of shrinking when melted. Heat and pressure are applied through a calendar roll such that the polymeric material becomes...http://www.google.ca/patents/US5567501?utm_source=gb-gplus-sharePatent US5567501 - Thermally apertured nonwoven product
