The new mainstream of environmentally friendly flexible packaging: kraft paper vertical bags, reshaping the new pattern of food and daily chemical packaging!

    Against the backdrop of the continuous promotion of plastic restriction policies and the green transformation of the consumer market, the kraft paper vertical bag (self standing bag), which combines the advantages of environmental protection, self standing display, and sealed preservation, has quickly replaced traditional pure plastic bags, glass jars, and metal small packaging, becoming the mainstream packaging solution for snacks, tea leaves, miscellaneous grains, pet food, and daily chemical raw materials. Relying on the natural and environmentally friendly properties of kraft paper and multi-layer composite barrier technology, it meets the full chain needs of brand display, warehousing and logistics, and terminal use, and is one of the fastest-growing categories in the current flexible packaging industry.
    1、 Structural technology: Multi layer composite design, balancing stiffness and preservation ability
    The core of the kraft paper vertical bag adopts a composite structure of outer kraft paper and inner food barrier film. The accordion style widened and folded bottom is the key to achieving upright placement, which is different from ordinary flat mouth paper bags. It can stand firmly on the ground and the shelf display is neat and beautiful.
    Outer substrate: Thickened primary color kraft paper and white kraft paper are selected. Some high-end models use FSC certified original wood pulp kraft paper, which is non bleached and free of harmful fluorescent agents. The surface texture is simple and high-end, suitable for organic, healthy, and handmade product brands; Paper is tear resistant, friction resistant, and not easily damaged during transportation.

    Inner barrier layer: matched with CPP, aluminum foil, and PLA biodegradable film according to product characteristics. Inner lining: ordinary food CPP waterproof film for dried fruits and miscellaneous grains; Coffee, tea, and dried meat are coated with aluminum foil to prevent light exposure, enhance fragrance, and isolate oxygen; Organic export products can fully biodegrade PLA lining, meeting overseas composting environmental certification.
    Multi functional structural accessories
    Top composite self sealing zipper: can be repeatedly opened and closed, continuously locking freshness after opening, matched with pre made easy to tear mouth, can be quickly opened without scissors;
    Transparent window design: The central PET frosted visible window allows consumers to visually inspect the internal goods, reducing unboxing inspection losses and enhancing purchasing trust;
    Coffee specific one-way exhaust valve: suitable for roasting coffee beans, discharging carbon dioxide from the bag, and isolating external air from moisture;
    Rounded explosion-proof edge pressing: The corners of the bag are treated with circular arcs and thickened with heat sealed edges, making it less likely for particles and powders to leak or break the bag.
    The entire production process adopts solvent-free composite technology, with no odor or solvent residue. It has passed the national standard food contact material testing and can directly contact dry goods, seasonings, and low-temperature baked goods. Its safety far exceeds that of ordinary composite plastic bags.