Original title: What is the difference between meltblown cloth pfe and bfe?

Melt blown cloth BFE refers to the detection of the bacteria filtration efficiency of melt blown cloth.

Melt blown cloth PFE refers to the detection of the filtration efficiency of melt blown cloth particles. The melt blown cloth filtration efficiency tester PFT-01 (also called melt blown cloth filter detector) developed by Jinan Zhongce Mechanical and Electrical Equipment Co., Ltd. can Detect the filtration efficiency performance of melt blown cloth particles.

What is meltblown cloth?

The main structure of the medical mask is a three-layer non-woven fabric, namely SMS structure.

Meltblown fabric structure diagram (SMS non-woven fabric structure diagram)

The inner S layer is ordinary non-woven fabric, which is mainly hygroscopic;

The outer S layer is a non-woven fabric with waterproof treatment, which is mainly used to isolate the liquid sprayed by the patient and play an anti-dropping effect;

The middle M layer uses an electret-treated meltblown non-woven fabric, which can filter suspended bacterial particles and is the most important core layer.

Melt blown cloth, commonly known as the "heart" of masks. Its main raw material is polypropylene, a film made of many crisscross fibers stacked in random directions. The fiber diameter ranges from 0.5 to 10 microns, and the fiber diameter is about one-thirtieth of the hair.

After understanding the common sense of meltblown cloth, the R&D department of Jinan Zhongce Electromechanical Equipment Co., Ltd. briefly introduced the relevant parameters of the meltblown cloth filtration efficiency tester PFT-01:

Meltblown cloth filtration efficiency tester

Main parameters of melt blown cloth filtration efficiency tester PFT-01:

Professional name: Particle filtration efficiency tester

Over-rate efficiency detection range: 0-99.999%

Accuracy: Level 1

Over-rate efficiency detection flow meter range: 10-100L/min

Flowmeter accuracy: 2.5 level

Sampling frequency: 1-9999 times/min

Filtration efficiency, particle concentration: 20-30mg/m3

Counting median diameter: salt particles (0.075±0.02) μm, oil particles (0.185±0.02) μm

Geometric standard deviation of particle size distribution: salt particles ≤ 1.86, oil particles ≤ 1.60

Dynamic detection range: 0.001-100) mg/m3, accuracy 1%

Host power supply: 220VAC 50Hz

Host net weight: 64 kg

Instrument configuration: host, computer, professional software, aerosol generator, laser dust particle counter, glass rotameter, vacuum pump