Plastic Film Extrusion Melt Pumps Application Scope

Plastic film extrusion melt pumps (gear pumps) play a key role in the film production process, with applications covering a wide range of material types, production processes and high-end film products. Below is a detailed categorization:< /p>

1. Divided by material type

Material type	Typical application	Melt pump role
Polyolefin	BOPP/CPP/PE films, wrap-around films	Stabilize high-pressure extrusion, reduce thickness fluctuation (CV value ≤1%), improve optical properties
Polyester	PET film (packaging, electronic base film)	Precise control of high viscosity melt to avoid degradation and safeguard tensile strength
Engineering plastics	PC film, PA barrier film	Coping with high processing temperatures (300°C+), preventing impurities due to gear wear
Bio-based materials	PLA degradable films	Low-shear design avoids molecular chain breakage and maintains mechanical properties of environmentally friendly materials

2. by production process

Process types	Application Scenarios	Melt Pump Core Requirements
Cast film (CPP/CPE)	Food packaging, medical films	Fast response to die pressure changes, eliminating “sharkskin” surface defects
Bi-directional stretch film (BOPP/BOPET)	Packaging, capacitor film	Ultra-high pressure stabilized output (30MPa+) to match the flow consistency of MDO/TDO stretching processes
Blown film	Agricultural shed film, shrink film	Adapts to cyclical pressure fluctuations, reduces risk of bubble tube rupture
Multi-layer co-extruded film	High-barrier packaging, laminating films	Individually controlled melt flow for each layer (e.g. ±0.5% accuracy required for EVOH barrier layers)

3. High-end specialty film applications

Film type	Technical requirements	Melt pump solutions
Ultra-thin films	3-8μm Li-ion battery diaphragm, capacitor film	Nanometer gear gap (≤20μm) + magnetic coupling sealing, to eliminate contamination
Optical films	Brightening film, polarizer base film	Constant temperature control ±0.5℃ to avoid melt streaks affecting light transmittance.
Functional films	Conductive film, antibacterial film	Special alloy gear material (e.g. Hastelloy), corrosion-resistant additives

4. Energy saving and intelligent applications

Energy-sensitive areas: melt pumps reduce extruder energy consumption by more than 25% in the production of solar backsheet film

Digital factory: linkage with MES system, real-time monitoring of melt pressure/temperature, predictive maintenance (e.g. bearing life warning)

5. Restricted application scenarios

Ultra-high temperature materials: PEEK film (melt temperature > 380 ℃) need to be customized heat-resistant gear material

Ultra-high filler materials: Calcium carbonate filled >40% film may accelerate gear wear, requiring hard coating treatment

Industry Data Reference

Adding melt pumps to a BOPP film line reduces scrap rate from 5% to less than 1.2% (source: AMI Consulting)

In the production of multilayer co-extruded barrier films, melt pumps can control interlayer thickness with an accuracy of ±0.3% (measured data).

Through rational selection, melt pumps can cover more than 90% of plastic film production needs, especially in the field of high-end film has become an irreplaceable core equipment.

Email: sale@meltpump.com

WhatsApp: +86 158 38331071

Any questions about our products, please feel free to contact us! We promise you high-end products and first-class service.Look forward to our cooperation!!!