Main Parts of Production Line:

The production of PP (polypropylene) meltblown non-woven fabric is a sophisticated process used to create highly efficient filtration materials, medical masks, and other applications requiring fine fiber diameters and excellent filtration properties. Here’s an introduction to a typical PP meltblown non-woven fabric production line:

1. Raw Material Preparation

- polypropylene Resin: The primary raw material used is polypropylene granules, which are chosen for their melt properties and suitability for creating fine fibers.

- Additives: Stabilizers, pigments, and other additives may be mixed with the resin to enhance the properties of the final product.

2. Extrusion and Meltblowing Process

- Extruder: The polypropylene resin is fed into an extruder where it is melted and homogenized. The temperature and pressure are carefully controlled to ensure consistent melt quality.

- Metering Pump: The molten polymer is fed from the extruder to a metering pump, which ensures a consistent and precise flow rate to the die head.

- Die Head: The metered molten polymer is then forced through a die with numerous small nozzles. High-velocity hot air (supplied by air heaters and blowers) is used to draw the polymer into fine fibers as it exits the nozzles.

3. Fiber Formation

- Airflow Control: The high-velocity air stretches and cools the molten polymer into ultrafine fibers, typically in the range of 1 to 5 micrometers in diameter.

- Deposition: The fine fibers are deposited onto a moving conveyor or collection belt, forming a web of non-woven fabric. The airflow and collection distance are crucial to determining the fabric's properties, such as fiber diameter, basis weight, and uniformity.

4. Web Formation and Bonding

- Suction System: Below the conveyor, a suction system removes excess air and helps the fibers settle into a uniform web.

- Calendering: The web may pass through calender rolls, where heat and pressure are applied to bond the fibers, enhancing the fabric’s strength and integrity.

5. Quality Control

- Inspection: Continuous monitoring of the web for uniformity, thickness, and other quality parameters.

- Testing: Regular sampling and testing for properties such as fiber diameter, filtration efficiency, tensile strength, and other critical performance metrics.

6. Slitting and Winding

- Slitting: The wide web is slit into narrower widths as per customer requirements.

- Winding: The slit fabric is wound into rolls for easy handling, storage, and transportation. Automatic winding machines ensure consistent roll tension and alignment.

7. Packaging and Storage

- Packaging: The finished rolls are carefully packaged to protect them from contamination and physical damage during shipping.

- Storage: Rolls are stored in a controlled environment to maintain their properties until they are shipped to customers.

Equipment Involved

- Extruders: For melting and homogenizing the polypropylene resin.

- Metering Pumps: To control the flow rate of the molten polymer.

- Die Heads: Equipped with fine nozzles for fiber extrusion.

- Air Heaters and Blowers: To provide high-velocity hot air for fiber formation.

- Conveyors and Suction Systems: For fiber deposition and web formation.

- Calender Rolls: For bonding and strengthening the web.

- Slitting and Winding Machines: For cutting the web to size and winding it into rolls.

Main Technical Parameter: