The rationality of the design of conductive ton bag has a great impact on the safety, firm and reasonable use of the container, conductive ton bag as always, carefully designed reasonable and scientific flexible container bag, provided to customers, conductive ton bag design should be based on the user's application conditions, reasonable selection of information, reasonable proportion. The anti-aging ability of plastic products under sun exposure is a question that is currently paid more attention to, and it is also a question that is often encountered in the process of practical application. Pay attention to the use of anti-violet agents and the selection of data in the production process.
Conductive tonnage bag
In order to improve the anti-aging ability of the conductive ton bag under sunlight, a certain amount of anti-violet agent and stabilizer should be filled in the flat wire drawing technology. According to the length of the operation period of the ton bag (half a year or one year), the increase is determined, usually between (0.1~3) %. Some companies add an anti-aging masterbatch made from a mixture of stabilizers, anti-violet agents and other additives, and the effect is also excellent. When planning container bags, it is necessary to fully consider the specific methods and methods of customers using ton bags, such as lifting, transportation methods, loading material functions, etc. In addition, we should also think about whether it is for the food packaging, and think about the non-toxic and harmless food.
Packaging materials are different, sealing requirements are different. Conductive ton bags such as powder or toxic items, afraid of contaminated items on the sealing function of the demand is very strict, simple moisture or mildew materials also have special needs for air tightness. Therefore, when planning the ton bag, pay attention to the impact of substrate coating technology and sewing technology on the sealing.
When planning the structure of the ton bag, the waist band strength should reach more than twice the strength of the base cloth in the national code, but the practice of such planning is not good, because the strength of the base cloth and the waist band is inconsistent, resulting in the base cloth cracking first. When planning, the waist band and the base fabric use the same strength of the base fabric raw materials, which can prevent this question.
Sewing technology planning
In addition to the sewing needs according to the national standard rules, the ton bag also needs to think about the aging resistance function of the suture and the impact of the seam on the tensile strength of the substrate. In the packaging of powder, toxic, afraid of contaminated items, the first thing to deal with the problem of sealing. Therefore, in the practical planning, the ton bag uses thick thread and fine needle or uses non-woven fabric and base fabric to sew together to improve the sealing. In addition, when sewing tons of bags, it is necessary to select polyester thread with a strength of more than 18kg to ensure that its sewing strength reaches the national standard.
Planning of inlet and outlet
In the national code, the vertical and horizontal tensile strength of the material inlet and outlet base cloth is ≥828N / 50mm, but in practice planning, because the discharge port accepts a larger tensile force, it can be higher, and the feed port strength can be lower, the film-covered base cloth (90-100)S/m2 is usually selected.
Other elements
In the planning and testing process, the ton bag with the bottom lift structure without the feed port can usually meet the safety factor requirements of the national regulations. However, the strength of the ton bag with the discharge port is usually not up to the norm, which requires thinking about increasing the strength of the bottom opening when planning, such as increasing the thickness of the base cloth at the bottom of the bag and increasing the reinforcing cloth at the feed port, which can deal with this problem.
In summary, in the process of practical planning, it is necessary to conclude and think about the objectives, constantly improve technical planning, strengthen technological innovation, select new information, new technologies, and new methods, and seek the best plan in planning to ensure the quality of planning.
Planning ton bags should pay attention to questions
Four, the base material selection
When planning flexible container bags, first clarify the weight of the loaded goods, and determine the ton bag volume according to the specific gravity of the packaged materials. It also depends on whether the loading material is sharp and solid block material, if so, the base fabric selection should be thicker when planning tons of bags, on the contrary, it can be thinner. In practical planning, the load of 500kg ton bag, the base cloth is usually selected (150-170)G/m2, the vertical and horizontal tensile strength of the base cloth (1470-1700) N / 5cm, and the elongation rate is 20-35%. Load capacity of more than 1000kg ton bags. The base cloth is usually selected (170~210)G/m2, the longitudinal and transverse tensile strength of the base cloth (1700-2000) N / 5cm, and the elongation rate is 20~ 35%.
Improve monofilament strength
In order to ensure the strength of the substrate, it is necessary to improve the tensile strength of the flat wire. The relative strength of the flat wire should reach more than 0.4N/tex, and the elongation should be 15-30%. In the practice of production and processing process, it is necessary to strictly control the amount of filling masterbatch, usually about 2%. If the masterbatch is increased too much, or the recycled material is increased, the strength of the substrate will decrease. Therefore, the quality should be strictly controlled in the material, and the drawing material produced by the manufacturer with the melting index reaching the national standard should be selected for the ton bag.
Five, the sling selection close
In the planning of conductive tonnage bag, the selection of sling material is very important. The safety factor of 1:6 is clearly stipulated in the national standard. In the practical planning of tonnage bag, we should first consider the loss of the strength of the sling during the sewing process; The second is to think about lifting methods. For example, the load of 500kg ton bag, the sling is usually selected (50-60)g/m, and the tension is (1300-1800) N/m; The ton bag with a load of 1000kg is usually selected (60-75)g/m, and the tension is (1800-2100)N/m, and the demand sling is necessary to meet the weaving density requirements. When planning other slings, two rings and four rings can be used to increase the tensile strength.
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