Open-top sewn-bottom bag: The bottom of the bag is sealed by sewing, commonly used for packaging powdery or granular materials.
Open-top glued corner-bottom bag: The bottom is sealed by adhesive or heat sealing, forming corner support. Suitable for general shopping bags or gift bags.
Valve-type sewn bag: The bag body is valve-shaped, with an opening at the top or side. Suitable for automatic filling, commonly used in the chemical and food industries.
Valve-type flat hexagonal end-bottom glued bag: The bottom has a hexagonal glued structure, improving stability and capacity.
Stand-up bottom paper bag: The bottom is stiffened or folded, allowing it to stand upright independently. Commonly seen in retail tote bags.
Four-side seal bag / Three-side seal bag: Mostly used for composite paper bags, forming a sealed structure by heat sealing three or four sides.
Multi-layer composite structure: such as three or four layers of kraft paper + PP woven fabric + PE inner film, used for high-strength industrial packaging.
