Ton bags are made of polyolefin resin wire drawing and weaving process, coated and cut into cylindrical or sheet substrates of different sizes, and then sewn into round or square bag-like products according to design requirements.
When designing a ton bag, it is necessary to fully consider the specific methods and methods used by customers, such as pulling, transporting and loading material properties. In addition, it is also necessary to consider whether it is food packaging, and there is no harm to the safety of food packaging. Different packaging materials, packaging materials are also different. Such as powder or toxic substances. Items that are afraid of contamination have strict requirements for sealing performance, and materials that are easily affected by moisture or mold also have requirements for air tightness. Therefore, in the design of the ton bag, attention should be paid to the influence of the substrate coating process and sewing process on the sealing effect.
When designing ton bags, we must first understand the weight of the goods, and determine the volume of tons according to the proportion of things to be packed. Also check that the installed data is clear. Solid blocks of data. If so, when planning the bottom cloth of the ton bag, the bottom cloth should be thicker, otherwise it should be thinner. In the actual design, the tonnage bag is generally selected as 500kg (150-170)G/m2 substrate, its longitudinal tensile strength is (1470-1700)N/5cm, and the elongation is between 20-35%. The ton bag weighs more than 1000 kg. Generally use (170~210)G/m2 substrate. Longitudinal and transverse tensile strength (1700-2000)N/5cm, elongation between 20~35%. According to the standard design of the ton bag structure, the conventional belt strength should be more than twice the strength of the substrate, but the actual planning effect is not ideal. Due to the different strength of the substrate and the belt, the substrate will crack first. In order to avoid this problem, fabrics of different strength should be used in the design, such as cloth. In addition to the sewing requirements specified in the standard, the metric ton bag shall meet the requirements.
Consider the aging resistance and stitching effect, consider the stitching strength. The powder is toxic, afraid of purifying the goods, the first thing to solve is the sealing problem. Therefore, in the actual planning, the ton bag uses thick and thin knitwear or non-woven fabric and fabric sewing to improve the sealing performance. In addition, when sewing tons of bags, to choose the strength of more than 18kg polyester thread, to ensure that the sewing strength of the standard. It is required to increase the tensile strength of the flat wire to ensure the strength of the bag base cloth. The strength of the ordinary grain should be above 0.4N/ Tex, and the elongation is 15-30%. In the actual production process, the filler masterbatch needs to be strictly controlled, generally around 2%. If the base material is added too much, the increase of recycled material will reduce the strength of the substrate. Therefore, the requirements of the original data are strictly controlled, and the melting index of the ton bag is selected according to the standard of the drawing raw materials consumed by the production enterprise
Post time: Apr-13-2023