Melt Pump
- Polymer extrusion melt gear pump
- melt pump for plastic extrusion
- Polymer Reaction Kettle pump
- gear pump rubber extruder
- melt pumps for extrusion
- Melt Gear Pumps for BOPP Films
- ZB-G bearing external melt pump
- melt pump for pvc extrusion
- ZB double shaft drive melt pump
- Explanation of terms for melt pump d
- ZB-X Series chemical gear melt pump
- PID Control System for extrusion
- PLC Control System for extruder
- ZB-U series melt extrusion spinning
- ZB-E series transfer melt pump for e
- ZB-H series high temperature and hig
- ZB-R series gear melt pump for rubbe
- ZB-K series chemical stainless steel
- ZB-D series pipeline melt pump for p
- ZB-F series melt pump for reaction k
- ZB-B series dosing standard thermopl
- ZB-C series plastic granule machine
Screen Changer
- polymer melt filtration screen changer
- recycled plastic screen changer
- slide plate screen changer
- pillar screen changer
- dual bolt screen changer
- continuous screen changer
- screen changer polymer filter
- Plastic extruder filter extrusion sc
- Biodegradable plastic PBAT/PLA hydra
- Single plate hydraulic screen change
- plastic extrusion screen changer
- single plate hydraulic quick screen
- Manual control screen changer
- Double plate continuous hydraulic sc
- Automatic mesh belt continuous scree
- Double piston four screen cavities c
- Single plate double screen cavities
- Single piston double screen cavities
- Double piston four screen cavities b
- Dual Bolt double screen cavities hyd
Feeding System
- force feeder extruder
- loss in weight feeder for masterbatc
- continuous feeding system
- Liquid loss in weight feeder
- china volumetric screw doser feeder
- Multi-component loss in weight feede
- Micro loss in weight metering feeder
- Single screw gravimetric dosing feed
- Twin screw loss in weight metering f
melt blown progress
contact us
- Batte Machinery Zhengzhou Co., Ltd.
- E-mail: sale@meltpump.com
- whatsapp: +86 158 38331071
- Tel: +86-371-67991755 / 67992755
- FAX:+86-371-67993277
- Address:No.11 Changchun Road, High-tech Zone, Zhengzhou, China.
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BOPP film extrusion melt pump
In the production of BOPP (bi-oriented polypropylene) film, the melt pump (gear pump) is one of the core components of the extrusion system, which is mainly used to stabilize the melt pressure, improve film thickness uniformity, and optimize production efficiency. The following is a detailed analysis of BOPP film extrusion melt pumps:
1. BOPP melt pump special requirements
Because BOPP film thickness uniformity, surface quality and production efficiency requirements are extremely high, melt pumps need to meet:
High precision flow control: gear clearance needs to be extremely small (usually <50μm), to ensure that no pulse output.
High temperature and wear resistance: BOPP processing temperature is usually in the range of 200-280 ℃, gear material needs to be nitrided steel or powder metallurgy steel (such as SKD61).
Low shear design: Avoid excessive shearing of PP melt leading to degradation (affecting film mechanical properties).
Quick changeover capability: reduce downtime for cleaning (e.g., rapid melt evacuation when switching from normal PP to matte PP).
2. Position of the melt pump in the BOPP line
Typical BOPP production line flow:
Extruder → **Melt pump** → Polymer Melt Filter → Die head → Casting roll → Longitudinal stretching (MDO) → Transverse stretching (TDO) → Winding
The melt pump, usually installed between the extruder and the filter, ensures a constant melt pressure into the die head.
Linkage with metering scales: the pump speed is adjusted in real time to match the extrusion volume through closed loop control.
3. Key selection parameters
| Parameter | Typical value | Description |
| Flow rate range | 100-5000 kg/h | Selected according to production line capacity. |
| Working Pressure | 10-30 MPa | Matching die head resistance required |
| Temperature control | 200-280°C | Accuracy ±1°C to avoid thermal degradation. |
| Gear material | Nitrided steel / ceramic coating | Wear-resistant, corrosion-resistant |
| Sealing method | Screw seal/hydraulic seal | Melt leakage prevention |
In BOPP film extrusion, polymer melt pumps are key equipment for quality, efficiency and energy saving. When selecting a pump, focus on flow accuracy, temperature resistance and low shear design, and choose the right brand and model in combination with line speed and film specifications. Regular maintenance can extend the service life of the pump and ensure the stability of film production.
Email: sale@meltpump.com
WhatsApp: +86 158 38331071
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