Scope of Application for Open-Top Bottom Bags

　　 Open-top square-bottom bag It is a new-generation plastic woven bag product that was gradually introduced from abroad in the 1990s. The open-top, square-bottom bag is a small bulk-packaging container that is convenient, hygienic, and offers excellent sealing—making it one of the most popular packaging materials worldwide, particularly well-suited for export packaging. Square-bottom valve bags feature a sealed bottom. In conventional woven bags, the bottom and sealing seam are stitched with sewing thread; however, this stitching repeatedly punctures the weave, creating numerous holes on the left side of the fabric. Since the sewing thread does not securely grip these holes, leakage can occur. To strictly prevent such leakage in sealed bags, an additional inner film liner must be inserted, which not only increases costs but also raises the physical workload for workers during filling operations. By contrast, square-bottom valve bags use adhesive to bond the two layers of woven fabric at the top and bottom, fundamentally eliminating the risk of leakage. Filling and stacking can be carried out directly without the need for additional sealing.

　　 Open-top square-bottom bag It is stronger than paper bags, can be reused multiple times, and has excellent water resistance. A key advantage of open-top, square-bottom bags is their recyclability; washing them with water is a common cleaning method. However, this practice wastes water, phosphate-containing detergents can contaminate soil, and ordinary washing does not effectively kill bacteria.

　　Application scope of open-top square-bottom bags: These bags are suitable for packaging chemical raw materials, organic pigments, food additives, pharmaceutical additives, construction materials, and more. The square-bottom, open-top bag combines traditional design principles with advanced innovations. Its square bottom ensures that the overall appearance of the bag is comparable to that of a traditionally square-bottomed bag, while its flat opening allows it to be sealed using the same methods employed for sewn-bottom bags. This makes it compatible with conventional sewn-seal techniques; additionally, a layer of plastic film can be applied over the paper to provide moisture-proof protection for products that require such features.

　　Open-top square-bottom bags are more environmentally friendly. With the growing adoption of new energy sources, relevant authorities are vigorously promoting environmental protection and energy conservation, even as environmental pollution continues to worsen. To combat “white pollution” and improve our quality of life, many environmentally conscious individuals have turned to a new product: the open-top square-bottom bag, whose advantages are self-evident.