Water Electret Meltblown-Meet FFP2 & FFP3 Standard

Compliance with EU mask standards《EN 149-2001 A1-2009》FFP2 & FFP3 levels

The core of the mask is the meltblown. The traditional corona thermal electret electrostatic meltblown material is made of polypropylene, adding corona when it is heated, thus formed not a permanent electrostatic electret, with little electricity charged and uneven distribution. When producing into masks, it needs stacking more polypropylene filaments to reach the qualified filtration efficiency, thus the breathing resistance will be high. Therefore, there is very few electrostatic electret meltblown on the market can meet the requirements of EU standard FFP2 and FFP3.

Hydro Charging Meltblown Manufacturing Processes 

Cobetter water electret meltblown, passing through a water electret equipment, firstly undergoes a cold water cooling, the pure water passes through a certain angle, pressure, and flow rate to spray the meltblown. The friction between the water and the meltblown cloth generates static electricity, which is transported through conductive material in the electret masterbatch and enters into tourmaline or zircon to achieve static retention. The advantage of water electret lies in its electrification process, which is carried out in a high humidity environment. The static electricity on the surface of the meltblown cloth is washed away by the water, leaving only the static electricity inside the meltblown.

The second process of water electret is a process of drying and electricity locking for meltblown. The drying process uses the flow of hot air, the surface temperature is increased and the surface air flow is increased to dry. This process is actually a working principle of a static elimination equipment. All of the electricity staying outside of the electret masterbatch, will be taken away. In this second process, a part of the electricity on the surface of the meltblown cloth is eliminated, that is, virtual electricity. Therefore, after the above two processes, the electret on the polypropylene can be guaranteed to be last long. 

Excellent Cobetter Water Electret Meltblown

Compared with the traditional corona thermal electret electrostatic meltblown material, Cobetter FFP2 mask meltblown / FFP3 mask meltblown is more saturated with static electricity, and its electrostatic retention is more than three times that of the electric electret, so the corresponding filtration efficiency is higher. Because the electric field is high, there are few materials to be stacked, thus the amount of polypropylene stacked is only half of the electric electret. The material required is thinner, and the breathing resistance is correspondingly lower. 

Cobetter experiments have verified that the superposition of single-layer 40g meltblown fabric and double-layer 30g meltblown fabric can effectively complete the high filtration efficiency requirements of oil particles of FFP2 and FFP3 masks of EU《EN 149-2001 A1-2009》standard. At the same time, due to low resistance of water electret meltblown itself, multi-layer superimposed will not result in resistance exceeding standard.  

Features and Advantages

• ·   Saturated amount of static electricity

• ·   High particle filtration efficiency

• ·   Few Polypropylene stacking volume

• ·   Low resistance

  
  

EU FFP2 & FFP3 Standard

Remarks: The European EU standard 《EN 149-2001 A1-2009》 requires both of salt particles (sodium chloride aerosol) and oil particles (paraffin aerosol, loaded till 120mg concentration environment) filtration efficiency achieve 94% and more than 99% for FFP2 and PFF3 masks. And under the condition of 95L/min wind speed, the inhalation resistance of FFP2 masks cannot exceed 240pa, and FFP3 does not exceed 300pa.

Links:

Cobetter water electret meltblown-meet LEVEL2 & LEVEL3 standard

Cobetter PTFE mask membrane-meet EU mask standard《EN14683：2019+AC》TYPE ⅡR level

BS EN 149-2001 A1-2009.pdf