Woven polypropylene bags have been used as an alternative to burlap or paper bags for many years and have been typically closed with sewing machines. Sewn bag tops contain holes which are an avenue for infestation and moisture to enter the bag contents. Doboy recognizes that this has long been and industry problem. Building on over 70 years of industry experience, Doboy now offers three machines designed to seal woven polypropylene bags. Double fold and glue, double fold and tape or conventional heat seal. Each style is unique and exciting. Click on the icons below to discover which method best suites your application.