Paper bags come in a wide variety of materials and styles, offering diverse presentation options.
Based on material, they can be categorized into: white cardstock bags, white-lined chipboard bags, coated paper bags, and kraft paper bags, with a small number made from specialty papers.
White Cardstock: This material is sturdy and thick, offering high rigidity, burst resistance, and surface smoothness. Common thicknesses range from 210g to 300g, with 230g being the most frequently used. Bags made from white cardstock feature rich colors and a premium texture, making them a top choice for custom orders.
Coated Paper: Characterized by a highly smooth, flat surface, this paper offers excellent whiteness and gloss, giving printed graphics and images a three-dimensional quality. Common thicknesses range from 128g to 300g. Like white cardstock, it yields rich, vibrant colors, though it is less rigid than white cardstock.
White Kraft Paper: This paper offers high burst resistance, toughness, and strength, with consistent thickness and color uniformity. Driven by regulations restricting plastic bags in supermarkets and a global trend (particularly in Europe and the US) toward eco-friendly alternatives to combat plastic pollution, white kraft paper has a promising market outlook. Made from 100% pure wood pulp, it is eco-friendly, non-toxic, and recyclable. It is tough and requires no lamination, making it ideal for eco-friendly garment bags and high-end shopping bags. Common thicknesses range from 120g to 200g; the paper lacks high gloss or sheen and is not suitable for designs requiring heavy ink coverage.
Kraft Paper: Also known as natural kraft paper. It features high tensile strength and toughness, typically appearing brownish-yellow. With excellent tear, burst, and dynamic strength, it is widely used for shopping bags, envelopes, and more. Common thicknesses range from 120g to 300g. Kraft paper is generally suitable for printing designs with one or two colors or simple color schemes. Compared to white cardstock, white kraft paper, and coated paper, yellow kraft paper is the most cost-effective option.
Grey-back white board: This is a type of paperboard with a smooth white front and a grey back. Common thicknesses range from 250g to 350g. It is slightly cheaper than white cardstock.
Black cardstock: A type of specialty paper that is black on both sides. It is characterized by a fine texture, solid black color throughout, rigidity, durability (good fold endurance), a smooth surface, high stiffness, high tensile strength, and high burst resistance. Common thicknesses range from 120g to 350g. Since it is black throughout, it is unsuitable for color printing but ideal for processes like gold or silver foil stamping, resulting in very attractive bags.
Categorized by edge, bottom, and sealing methods: There are four types of paper bags: open-mouth sewn-bottom bags, open-mouth pasted-corner-bottom bags, valve-type sewn bags, and valve-type flat hexagonal-end pasted bags.
Categorized by handle and opening styles: NKK (punched holes with threaded handles), NAK (handles attached without holes-subdivided into non-folded-cuff and standard folded-cuff types), DCK (die-cut handles in the bag body, no separate handles), and BBK (flap-top closure, no punched holes).
Categorized by usage: Includes document bags, envelopes, tote bags, cement bags, feed bags, wax paper bags, fertilizer bags, laminated paper bags, four-ply paper bags, medicine bags, garment bags, food bags, shopping bags, gift bags, and wine bags. Different uses dictate specific requirements for dimensions and paper thickness; therefore, customization based on actual needs ensures cost-effectiveness and efficiency. This approach supports material conservation, environmental sustainability, and optimized corporate investment.