How To Produce Meltblown Fabric With High Filtration Efficiency and Low Breathing Resistance?

What do you think of a high-quality anti-viral mask? From long-term wearing experience, you can easily see that those masks with high filtration efficiency, such as N95 masks, also make it very easy to breathe! The key to achieving this goal is Melt Blown Fabric. In this article, we will share some of the skills of meltblown line technicians who have been engaged in this industry for decades.

The manufacturing of Meltblown Fabric Production Line is not complicated, the main thing to overcome is the manufacturing process. Due to the need to match temperature, air pressure, mold, speed and other parameters, it is necessary to continuously grind and adjust the product to obtain the best results (according to the meltblown cloth core index test and high filtration efficiency and low breathing resistance).

1.Ways to improve filtration efficiency

Increase hot air flow or temperature (increase fiber fineness, reduce porosity, increase trapping capacity, but increase resistance).

Increase the electrostatic voltage (current) (polarize the fiber, increase the electrostatic field energy of the fiber and improve its adsorption capacity).

Add powder or other electrons to the raw materials (to increase the chargeability and storage time of the fibers so that they can carry more charge time).

Increase the suction under the net (increase the density of Melt Blown Nonwoven Fabric Fiber and improve the ability of fiber capture) (much larger grams, not commonly used).

Appropriately reduce the output (in the same process, the extrusion volume becomes smaller, the fiber becomes thinner, and the resistance increases).

Increase the working temperature of the die (tip) etc. (better melt flow, finer fibers).

Increase the spinning environment temperature (usually at a higher room temperature for fiber thinning, the resistance increases significantly, and other physical indicators decrease).

Appropriately increase the amount of powder to be added.

Meltblown Fabric Production Line

2. Ways to reduce resistance

Reduce hot air flow or temperature (fiber coarsening, high porosity, low resistance and reduced efficiency).

Increased DCD (increased fiber bulkiness, high porosity and reduced efficiency).

Reduce the spinning environment temperature (fully cool the fiber, fluffy structure, increase porosity, and use hot air to reduce resistance and improve efficiency).

Reduce the suction under the steel wire (dense and fluffy fibers, greater porosity, more significant weight).

Decrease the working temperature of the heated area (such as the die (tip)) (fiber thickens and increases porosity).

Increase the metering pump (the coarsening of the extruded fiber and the increase of the porosity, usually used in the order of rapid conversion).

Appropriately reduce the number of grams (within the scope of internal control).

3. Ways to reduce resistance and improve efficiency at the same time

Increase the DCD, while appropriately increasing the hot air flow or temperature to reduce the air absorption at the bottom of the net (increase the fineness and bulkiness of the fiber).

Increase the fiber fineness while reducing the temperature of the spinning environment (for example, by adding cold air devices).

Improve the bulkiness of the fiber, while appropriately increasing the electrostatic voltage (current) and increasing the amount of powder added.

Increase the fineness of the fiber and appropriately reduce the weight (not commonly used).