Square bottom bags generally have five sides, front and back, two sides and bottom. According to the unique structure of square bottom bag, it is convenient to package three-dimensional goods or square products. This bag has the packaging significance of plastic bags and fully expands the new packaging thinking. Therefore, it is widely used in children's life and production. Square bottom bag plastic has two kinds of polymer structures. Linear structure, the polymer compound with this structure is called linear polymer compound body structure, and the polymer compound with this structure in square bottom bag is called body polymer compound. Some polymers have a branched chain called branched polymer (limb polymer), which belongs to linear structure. Some polymer molecules have cross-linking, but less cross-linking. It is called network structure and belongs to body structure. Two different structures represent two opposite properties.
Square bottom pockets are also known as square open pockets
(1) Definition of square sole pocket: square sole pocket is a small packaging container, which is convenient, tidy and well sealed. It is one of the most popular packaging materials in the world, especially suitable for export packaging. Square bottom bag
(2) Process description of square sole pocket: the square sole pocket is based on paper plastic composite bag or kraft paper bag. The specification and size of the square sole pocket is based on the customer's requirements. The environmental protection adhesive is used, folded manually, and the packaging bag with holes in the bottom seal is made.
(3) Performance parameters of square sole pocket: surface material: natural color, white, color kraft paper or elastic kraft paper. Inner material: natural color, white kraft paper or elastic kraft paper. Additional materials: PP and PE moisture-proof film can be added. Square bottom bag
Product features: all environmental protection products, diversified materials, suitable for various product packaging requirements. The full paper packaging meets the requirements of environmental protection and export packaging to Europe and the United States. It is suitable for production according to the requirements of food hygiene. It is extracted and dried at high temperature, beautifully printed, beautiful packaging shape, large packaging volume, bracket packaging, and automatic charging of packaging machinery.
(4) Application scope of square bottom bag: chemical raw materials, pigments, food additives, pharmaceutical additives and square bottom bag are packaging bags with both traditional thinking mode and advanced thinking. The bottom of the bag is square, and the overall effect of the bag can be comparable to that of square valve bag. The flat entrance is the same as the packaging and sealing method of the pocket sewing the sole. It is suitable for the traditional sewing and sealing method. Plastic film can be put in the middle of the paper to package the products that need to be wet.
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