Comprehensive Guide to PE Packaging Bags: Types, Processes, and Applications

Polyethylene (PE) is a thermoplastic resin polymerized from ethylene and widely used in packaging. It is categorized by material into LDPE, LLDPE, HDPE, etc., and by manufacturing process into various types such as PE flat bags, ziplock bags, reclosable zipper bags, envelope bags, punch-handle bags, hand-carry bags, zipper bags, and PE film. Each process has distinct features: for example, ziplock bags come with a strip for manual sealing, while reclosable zipper bags include added zipper tracks and allow for more intricate printing. Envelope bags are commonly used for clothing and express delivery, and handle bags come in punch-handle and hand-carry styles. PE film is further divided into stretch film and shrink film. In the market, these bags are often sold individually or in rolls. Small bags are used for accessory packaging and may offer anti-static properties, while roll bags may require cutting or come with pre-cut notches. It is important to note that food-grade PE material should be chosen for direct food contact to ensure safety.