Properties of Melt blown Nonwovens | JINHAOCHENG

What are the properties of melt blown nonwovens? Today, let's take a look at the following. I hope it will be helpful to you.

Performance characteristics of Melt blown Nonwovens

Melt-blown nonwovens is a kind of nonwovens with ultra-fine fiber structure, which is prepared by melt-blown process and high-pressure hot air drawing. Melt blown nonwovens has become a more and more important filter material because of its excellent filtration performance, high yield and simple processing technology. The filter material prepared by melt-blown method has the advantages of adjustable fiber fineness, messy and fluffy three-dimensional structure and high filtration efficiency. It plays an important role in medical and health, food chemical industry, microelectronics, environmental protection and other fields.

Under the premise that other process parameters remain unchanged, the hot air pressure has a great influence on the properties of nonwovens. With the increase of hot air pressure, the air permeability of the product decreases gradually, that is, the air permeability decreases. After the fiber is ejected from the spinneret hole, it is further stretched and refined under the traction of hot air. Higher hot air pressure is more beneficial to fiber refinement. Therefore, with the increase of hot air pressure, the fiber diameter becomes smaller. When numerous fibers are cluttered and irregularly piled on the mesh equipment to form melt-blown nonwovens, the finer the fibers are, the easier it is to form nonwovens with high porosity and high specific surface area, and the pore diameter formed between the fibers is relatively small. therefore, the interception efficiency of particles is also higher.

Under the premise that other process parameters remain unchanged, the hot air pressure has a great influence on the properties of nonwovens. As the temperature of the hot air rises gradually.

The air permeability of the product decreases gradually, that is, the air permeability decreases. After the fiber is ejected from the spinneret hole, it is further refined under the traction of hot air. Higher hot air temperature can provide more heat, which slows down the cooling process of the fiber and is more conducive to the drawing and refinement of the fiber. Therefore, with the gradual increase of hot air temperature, the fiber diameter becomes smaller. When countless fibers are randomly stacked and bonded on the mesh equipment to form melt-blown nonwovens, the finer the fibers are, the more likely they are to form nonwovens with high porosity and high specific surface area structure, and the pore size between the fibers is relatively small. therefore, the interception efficiency of particles is also higher.

When PET melt blown nonwovens are prepared by melt blown method, hot air pressure, hot air temperature and resin viscosity have great influence on the properties of PET melt blown nonwovens. Increasing the hot air pressure and temperature and reducing the viscosity of PET resin are beneficial to the formation of fine diameter fiber structure and improve the interception efficiency of particles.

The above is the introduction of the properties of melt blown nonwovens. If you want to know more about melt blown nonwovens, please feel free to contact us.