The three-side-sealed bags include Tyvek on one side and HDPE or other film capable of withstanding EtO, radiation or steam sterilization on the other side. The seals are made via a proprietary process that doesn't allow excess heat to compromise Tyvek's integrity or cause it to become brittle or wrinkled. A bag can hold up to 10 lb of stoppers.
The Isotech(TM) bag from Tolas Health Care Packaging (Feasterville, PA) allows manufacturers to sterilize and ship large quantities of parenteral packaging components in one package.
Apr 30th, 1997