Flexible packaging belt extruder is a device used for producing flexible packaging belts. It extrudes molten plastic materials into a packaging tape with a certain shape and size through an extruder. Flexible strapping is commonly used to package various goods, such as cardboard boxes, wooden boxes, pallets, etc., to increase the stability and safety of the goods
Product Description
Effective solution for cargo securing, not only safe and convenient to use, but also versatile due to its flexible nature, making it suitable for various fields and environments.
Polyester flexible strapping band is the optimal system for cargo securing, offering not only safety and convenience but also versatility due to its flexible properties, making it applicable across different industries and environments.
With high tensile strength, it replaces traditional steel strapping methods, ensuring safe usage without scratching the packaged goods. It possesses excellent tension retention and memory, maintaining tightness over prolonged periods without loosening, and can withstand pulling forces ranging from 0.5 to 8.5 tons. Polyester fiber flexible strapping bands have been certified by the Association of American Railroads (A.A.R) and the European Rail Industry (R.I.V).
Product Description: Polyester flexible strapping bands are made from multiple strands of high molecular weight polyester fibers, used to bind dispersed goods into a unified entity.
1. Characteristics:
2. Production Method:
The production equipment for flexible strapping bands includes plastic extruders (main and auxiliary machines), cooling tanks, ovens, traction embossing units, and coilers.
The main and auxiliary machines of the flexible strapping band production line are driven by variable-speed motors, reducers, and shaft sleeves. The forming section consists of screw barrels, die heads, and mouth molds. Raw materials are heated and extruded into initial billets from the hopper into the screw barrel. Temperature control: 1st section of the machine body – 120°C, 2nd section – 170°C, 3rd section – 220°C, and the die head at 250-280°C.
The cooling tank in the flexible strapping band production line cools and sets the initial billets from the main and auxiliary machine dies. As the billets exit the die head at high temperatures, immediate cooling in water is necessary because isotactic polypropylene tends to form crystalline structures under rapid cooling conditions, resulting in a loose molecular structure conducive to stretching and obtaining high-quality products. The cooling water temperature is generally maintained at 30-40°C, and the distance from the die head to the water surface in the production line should be 15-45 mm.
The first traction in the flexible strapping band production line consists of variable-speed motors, reducers, chain drives, and traction rollers. It transports the shaped billets to the oven.
The secondary heating in the oven of the flexible strapping band production line facilitates stretching; the purpose of stretching is to increase the longitudinal strength of the strapping band and reduce elongation. The third heating in the oven of the production line eliminates stretching stress; after relieving thermal stress, shaping occurs in the cooling tank.
The embossing machine in the flexible strapping band production line is driven by a variable-speed electric motor through belt drive, chain drive, and gear drive to the second traction, embossing, and third traction. a. The second traction stretches the billets heated for the second time through tension bars to shape them again and simultaneously delivers them to the embossing rollers; b. After stretching, the strapping band passes through two embossing rollers to imprint patterns, which increase friction during use and prevent slippage, enhancing the appearance. After embossing, the product is conveyed to the cooling tank or oven; c. The third traction in the production line conveys the shaped product from the cooling tank to the coiler.
Polyester fiber flexible strapping bands have high strength, similar to steel; they are lightweight and flexible, weighing less than 20% of steel; they do not have sharp edges that could damage goods or cause injuries to workers when being used or cut. They do not rust or corrode, maintaining integrity in various temperature and climate conditions (-40°C to 130°C); they have high linear and system tensile strength, can buffer significant impact forces during transportation, and have good elasticity. They offer excellent extensibility and tightness, with a soft texture that does not damage the surface of goods, requiring special buckles for use. For bundling with large loads, manual plastic strap tighteners are needed.
3. Specifications: 13mm, 16mm, 19mm, 25mm, 32mm.
4. Compared to steel or other strapping bands, they have the following advantages:
