PET Strap Extrusion Melt Pump – Gear Metering Pump for PET Strapping Band Production

The PET strap extrusion melt pump is a positive displacement gear metering device specially designed for polyester strapping band extrusion systems. Installed between the extruder and forming die, it is an essential auxiliary unit to stabilize melt delivery and improve finished strap quality for both virgin and recycled PET production lines.

Unlike relying only on the extruder screw to push molten PET, the PET strap extrusion melt pump takes over the precise metering task. The extruder mainly undertakes plasticizing and feeding, while the gear pump provides fixed volumetric output. This separation decouples melt flow from screw pressure fluctuations. Even when processing recycled PET flakes that have unstable viscosity and impurity content, the pump maintains steady outlet pressure and consistent melt supply to the die. The direct result is PET straps with uniform thickness, width and stable tensile strength, which is critical for heavy pallet bundling, brick packing and cotton bale strapping.

This melt pump adopts high-temperature wear-resistant tool steel for gears and pump body. Precision grinding and lapping control internal clearances to minimize melt backflow under high pressure. Integrated electric heating sleeves and temperature sensing interfaces support accurate temperature control within the PET processing window of 280°C to 320°C, effectively preventing polyester thermal decomposition and carbon buildup inside the pump. It can be matched with single-screw extruders, twin-screw compounding extruders and continuous hydraulic screen changers, realizing uninterrupted filtration and long-cycle continuous production.

Manufacturers gain multiple practical advantages by adding a PET strap extrusion melt pump to their lines. First, dimensional tolerance of finished strapping bands is greatly tightened, reducing defective rates and waste of PET raw materials. Second, it reduces backpressure on the extruder, lowering motor load and power consumption. Third, stable pressure conditions reduce abrasion of the screw and barrel, extending the service life of the whole extrusion equipment. Fourth, it improves production consistency, making batches of PET strapping more suitable for export packaging standards.

We supply different displacement models of PET strap extrusion melt pumps, including 75cc, 100cc, 120cc and customized versions. Complete drive components, installation brackets and technical guidance are available for new line assembly and old production line renovation. All pumps meet CE standards and come with reliable after-sales support for global extrusion customers.

For PET strap producers pursuing stable output, fewer rejects and better product competitiveness, upgrading with a professional PET strap extrusion melt pump is one of the most valuable investments in the extrusion process.

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