1. The material of the container ton bag
The common materials mainly include polypropylene (PP) and polyethylene (PE), which are the first choice for manufacturing bulk bales because of their excellent mechanical properties and chemical corrosion resistance. In addition, there are some other materials such as polyester and nylon that are also used in specific applications.
Polypropylene (PP)
Polypropylene (PP) has excellent tensile strength and abrasion resistance, which enables the container ton bag to maintain structural stability and not be easy to break when loading and transporting heavy loads. Its chemical inertness makes PP well resistant to most acids, alkalis and organic solvents, making it suitable for the packaging of chemical products. In addition, the low density of PP makes it lightweight, easy to handle and store. PP also has good processing performance, and can be processed into containers of various shapes and specifications through weaving, coating and sewing processes, so as to meet the needs of different customers. Its heat resistance and aging resistance also make the FIBC made of PP suitable for long-term use in various climatic conditions. PP is environmentally friendly and recyclable, but it is still necessary to pay attention to reducing the impact on the environment in the production and recycling process.
Polyethylene (PE)
One of the biggest advantages of polyethylene (PE) is its excellent flexibility and impact resistance, which allows the bulk bales to absorb impact forces during loading and transportation, reducing the risk of breakage. Its chemical inertness makes PE well resistant to most acids, bases, and salts, making it ideal for use in the storage and transportation of chemicals. The low-temperature performance of PE is better than that of PP, and it can still maintain good toughness in cold environments and is not prone to brittleness. The low density of PE makes the bulk bales made of it light in weight and easy to handle and operate. PE also has good aging resistance, and by adding antioxidants and UV stabilizers, it can extend the service life of container ton bags.
2 The manufacturing process of the bulk package
Weaving process
The weaving process is one of the most important links in the production process of container ton bags, which plays a decisive role in its strength and durability, using polypropylene (PP) or polyethylene (PE) as the main material, which is made into flat wires through a wire drawing process, and then these flat wires are woven into fabrics using a circular loom. The weaving density and weaving method directly affect the physical properties of the container ton bag. High-density weaving can improve the tensile strength and wear resistance of bulk bales, but at the same time, it also increases the amount of material used and production costs. In order to achieve the best performance, reasonable weaving density and weaving methods, such as plain weave and satin weave, are usually used to achieve a balance between strength and cost. In the weaving process, it is also necessary to pay attention to the uniformity and stability of the weaving process to avoid uneven weaving and fabric defects, which will reduce the bearing capacity and service life of the container ton bag.
Coating process
Using the coating process, the polypropylene (PP) or polyethylene (PE) material is coated on the surface of the woven cloth through the extrusion equipment to form a uniform film, which can effectively prevent the penetration of moisture and chemicals, so as to protect the goods inside. In the coating process, the thickness and uniformity of the coating are the key control parameters. Thicker coatings can improve water and chemical resistance, but increase the amount and cost of materials; A thinner coating may not provide adequate protection. To achieve the best results, the coating thickness and uniformity need to be tightly controlled during the production process. Using advanced extrusion equipment and automatic control system, high-precision coating process can be realized.
Post time: Mar-20-2025