In the production of big bags, in order to ensure the strength of the base fabric, the tensile strength of the silk must be increased. The relative strength of the flat wire should be above 0.4N/tex, and the elongation should be 15%-30%. In the actual processing process, the amount of filler masterbatch needs to be strictly controlled, generally around 2%. If too much masterbatch is added, or recycled materials are added, the strength of the base fabric will decrease. Therefore, we must strictly control the quality of raw materials, and select wire drawing raw materials produced by regular manufacturers whose melt index reaches the national standard.
In the production of jumbo bags, there are strict regulations from the purchase of raw materials to production and finished product testing, so that the products produced in this way are of better quality and are favored by the majority of users. Many customers will ask about the load-bearing capacity of the bag when purchasing a ton bag. The load-bearing capacity of the bag mainly depends on the following three aspects:
1. The base fabric and sling used in the big bag have different percentages of masterbatch, and the tensile force they bear is different.
2. The design methods of ton bags are different, and the load-bearing force is different. Generally, they can be divided into: four-corner cross-corner semi-hanging type (suitable for less than 1 ton), and pocket bottom type (suitable for more than 1.5 tons).
3. The production process of ton bags The load bearing of the bags is related. The better the sewing process, the bags produced in accordance with national standards generally have guaranteed quality. If it is production, there are skipped stitches and segmented lines in the sewing thread, which will affect the load-bearing of the bag.
It is necessary to prepare the product materials during the processing of large bags, and mixing materials is an indispensable link. The following is a brief introduction to the specific operation steps of this process.
When mixing new and old raw materials, special attention should be paid to the uniformity of mixing, and at the same time, raw materials with similar melt indices should be selected for compounding. If the melt index difference of the raw materials is too large, the difference in melting temperature will be large, and the plasticization cannot be uniform at the same time during the plasticizing extrusion process, which will seriously affect the stretching, resulting in a decrease in the quality of the flat yarn. Production. During the mixing process, pay attention to the drying time and temperature of the raw materials.