PET PP Packing Strap Production Line Overview
PET and PP packing straps are widely used to secure cartons, palletized goods, building materials, and industrial products during handling and transportation. Although both are plastic strapping materials, they have different mechanical properties and processing requirements.
The IVIMA PET PP Packing Strap Production Line is designed to manufacture plastic packaging straps using recycled PET bottle flakes or PP granules as the main raw materials. Through material preparation, extrusion, cooling, stretching, and winding, the line produces strapping bands in different widths and production capacities. The production system incorporates PLC control, automatic quantitative feeding, cyclic preheating and drying, precise temperature regulation, and frequency-controlled motors. Its configuration also includes a specialized extrusion screw, a high-temperature melt gear pump, and a static electricity generator.
Depending on the selected model and processed material, the line operates at production speeds ranging from 10 to 100 m/min. The PET series provides nominal outputs of 50–200 kg/h, while the PP series covers 30–80 kg/h. Both single- and double-output configurations are available. By selecting the appropriate extrusion setup, strap dimensions, and stretching conditions, manufacturers can produce packaging straps for different industrial strapping applications.
Raw Materials for PET and PP Straps
The quality of a finished packing strap begins with the raw material. Moisture, contamination, polymer consistency, and melt behavior can all affect extrusion stability and strap performance. PET and PP have different drying and processing requirements. Each material should be manufactured using the appropriate production settings and equipment configuration.
Recycled PET Bottle Flakes
Recycled PET bottle flakes are the primary raw material for PET packing strap production. PET strapping is commonly used for securing heavy palletized goods, such as bricks, timber, metal products, and industrial packaging. It offers good tensile strength and relatively low elongation when manufactured under suitable conditions.
The recycled flakes should be properly sorted, washed, and dried before extrusion. Moisture is especially important because PET is sensitive to hydrolytic degradation during high-temperature processing. Poorly dried material can reduce molecular weight and affect the mechanical properties of the finished strap. Consistent flake quality also helps maintain more stable extrusion pressure, strap dimensions, and stretching performance.
PP Granules for Packing Straps
PP packing straps are produced from polypropylene granules suitable for extrusion. Compared with PET strapping, PP straps are generally lighter and more flexible. They are widely used for cartons, boxes, bundled products, and other packaging applications where high PET-type tensile strength is not required.
PP granules should have suitable melt flow characteristics for strap extrusion. Variations in material quality can affect strap thickness, surface appearance, and stretching behavior. Recycled PP may also be considered when its composition and properties meet the requirements of the intended packaging application.
Material Preparation Requirements
Raw material preparation is an important part of continuous strap production. For recycled PET flakes, proper drying helps prevent moisture-related degradation during melting. Stable feeding is also necessary to avoid fluctuations in the amount of material entering the extruder.
The line uses automatic quantitative feeding together with cyclic preheating and drying functions to support material preparation. PET and PP should be processed separately using suitable temperature profiles, screw configurations, and downstream stretching settings.
Main Features of the PET PP Strap Line
PLC Control and Automatic Feeding
The production line adopts PLC control to coordinate operating functions and support adjustments to processing parameters. Automatic quantitative feeding helps maintain a controlled supply of plastic material during extrusion. This is especially useful when operating at continuous production speeds, where inconsistent feeding can affect melt pressure and strap thickness. The control arrangement also supports coordinated operation between the extrusion and downstream processing equipment.
Accurate Extrusion Temperature Control
PET and PP require different melting and processing conditions. The temperature control system regulates the extrusion heating process to maintain suitable conditions for the selected material. Consistent temperature regulation helps reduce melt fluctuations, which can otherwise affect strap formation and dimensional uniformity. The system is designed with energy-conscious temperature regulation, although actual power consumption depends on operating conditions and the selected machine model.
Frequency-Controlled Motor Operation
The machine uses frequency-controlled motors to adjust operating speed according to production requirements. Speed adjustment is important when coordinating extrusion output with cooling, traction, stretching, and winding. The production speed range of 10–100 m/min provides operating flexibility across different strap specifications and configurations. Actual running speed depends on the material, strap dimensions, and production setup.
Specialized Screw and Melt Gear Pump
The specialized extrusion screw is designed to process the selected plastic material under appropriate temperature and pressure conditions. The high-temperature melt gear pump supports controlled melt delivery toward the strap-forming die. Together, these components help maintain a more consistent extrusion process. A static electricity generator is also included in the stated machine configuration. Its operating arrangement forms part of the overall equipment specification.
