What Is PLA Melt-blown Fabric?

      PLA melt-blown cloth is the PLA slice through the screw extruder to melt it, through the spine-jet hole to spray it into a fiber, and under the high-speed hot air spray, so that it is strongly stretched to form a very fine short fiber. These short fibers are adsorbed on the mesh curtain, and the fibers are condensed into a net and adhere to each other to become melt-blown nonwovens, and are finally packaged into rolls.

PLA melt-blown cloth combines the advantages of PLA and melt-blown technology. As an environmentally friendly material, PLA has the characteristics of renewable, biodegradable, biocompatible, low carbon emission and low energy consumption. PLA This linear thermoplastic biodegradable aliphatic polyester is based on the starch extracted from some annual plants such as corn, wheat, cassava as the initial raw material, so its source is renewable matter. After PLA products are discarded in soil or water, they will be completely decomposed into CO2 and H2O within 30 days under the action of microorganisms, water, acid and alkali, and then become the starting raw material of starch under the cooperation of sunlight, which will not pollute the environment, so it is a completely natural recycling type of biodegradable material. The current synthesis process of PLA basically uses L-lactic acid as monomer, and L-lactic acid is a normal product of sugar metabolism in human body, so PLA fiber has excellent biocompatibility in human body. PLA reduces CO2 emissions and energy consumption compared to other petrochemical plastics. Each kg of PLA slicing releases 3.4kg of CO2. At the same time, PLA melt-blown nonwovens, because of the melt-blown process, have the advantages of short process, simple process and low cost, which is precisely the reason why PLA is applied in melt-blown process.

The melt-blown non-woven fabric itself has only 70% filtration performance, so it is necessary to add electrostatic charge effect to the melt-blown fabric by electrostatic electret process, and improve the filtration efficiency by electrostatic method. The electret process is divided into electric electret and water electret. At present, our suppliers producing PLA melt-blown cloth are traditional electrets.

Although PLA melt-blown cloth is degradable, the filtration efficiency is less stable than PP melt-blown cloth. If the storage sealing conditions are improper, the electrode is easy to lose, and the filtration efficiency will decrease. Of course, the price is also more expensive than PP melt-blown cloth.