) and extruded through a circular die to form a continuous tube, which is then inflated with air to achieve the desired thickness (measured in "mils").
Manufacturers may include "anti-block" agents to prevent layers from sticking and "slip" agents to ensure items slide into the bag smoothly. 3. Industrial and Personal Applications buy small ziplock bags
The foundational technology for reclosable bags emerged in the early 1950s: ) and extruded through a circular die to
