PP woven bags can be categorized by structural design into standard woven bags, laminated woven bags, and bags with inner liners. Standard woven bags are made directly from woven polypropylene flat yarns; they are cost-effective and breathable, making them suitable for packaging general commodities such as grain and animal feed. Laminated woven bags feature a plastic film coating on the woven fabric surface, which enhances moisture and water resistance. Bags with inner liners incorporate an internal polyethylene (PE) liner, making them ideal for packaging powdered or granular products that require superior sealing.
Based on manufacturing processes and bag-mouth configurations, PP woven bags come in various types, such as sewn-bottom bags, heat-cut bags, hemmed-top bags, and valve bags. Sewn-bottom bags are produced using a mature process and are widely used across most packaging applications. Heat-cut bags feature neat edges that resist fraying, offering a cleaner appearance. Valve bags are designed for automated filling systems-commonly used in industries like cement and dry-mix mortar-to boost packaging efficiency and minimize material spillage.
Categorized by application, PP woven bags include types designed for grain, chemicals, construction materials, fertilizers, and logistics. These bags vary in dimensions, load-bearing capacity, printing methods, and functional design; manufacturers customize them based on the weight of the contents, storage conditions, and transportation requirements to meet the specific performance and usability needs of different industries.
