Why Chip Bags are Hard to Open...

John Spevacek is a chemical engineer with a confes...  ...Here's how the project came about. I was in the Packaging Films Group, making multilayer polypropylene film...  ...Group, making multilayer polypropylene films for food packaging . The film had a heat-seal adhesive on one side of...

http://www.neatorama.com/2012/05/03/why-chip-bags-are-hard-to-open/