SOS (Square Bottom Structure) refers to the design of the square bottom structure. It achieves
self-reliance, expansion and stable support through the flattening and shaping of the bottom, which is significantly superior to ordinary flat-bottomed paper bags. At present, the mainstream market large SOS
Kraft Paper Bag has been widely used in
festival gift boxes, wedding gifts, whole box packaging, e-commerce delivery and other high-demand scenes, and has become a key choice to replace plastic shopping bags driven by environmental protection policies.?
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Extra large kraft paper SOS bag is a commercial packaging solution with strong load bearing, high environmental protection and strong identification, specially designed for bulk distribution of large gifts, festival gift boxes, high-end clothing and takeout. The square bottom (SOS) structure greatly improves the standing stability and loading capacity, and the natural coarse texture of kraft paper strengthens the tone of the brand, and the whole series supports LOGO bronzing, UV printing, laminating and other upgrading processes.?
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Highlights of the Process and Materials
Triple reinforcement design: ① Bottom thickened square plate (2mm card paper embedded); ② The edge of the lifting rope is wrapped with double-layer kraft paper. ③ UV partial coating at the bag opening to prevent tearing;
Environmental protection closed-loop attributes: 100% degradable (decomposes within 90 days in the natural environment), recyclable and renewable, zero plastic addition, helping enterprises obtain green packaging certification;
Strong printing adaptability: High surface smoothness, supporting offset printing /UV printing/hot stamping/embossing, LOGO clarity reaches 95% restoration rate.?
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Extra large kraft SOS bag is not a simple "enlarged version", but a triple upgrade of structure, function and brand value: it solves the problem of standing with a square bottom, uses thick kraft paper to ensure load-bearing safety, and uses customizable process to carry the brand expression. If you are targeting mid-to-high-end catering, chain clothing or brands that emphasize sustainable image, this is an ideal solution that combines practicality and communication power.