Meltblown filter media is produced from special polypropylene resins which are melted during a complex spinning process. High temperature and pressure together with specialized technique in automated production lines create a consistent filter
matrix to ensure optimum filter efficiency with low resistance. The electrets present in PP enhances filter efficiency and remains stable throughout the filter life and the antimicrobial additives preserve the filter media throughout its useful life.
The media is fire resistant to UL-2 and is also water repellent which limits microorganism growth.
ELECTROSTATICALLY CHARGED MEDIA
Conventional filter media such as meltblown and glassfiber rely on common filtration mechanisms such as interception and inertial impaction which require a
small pores size in order to capture finer particulate matter.
Electrostatically charged media uses electrostatic deposition. This mechanism works using both coulombic and dielectrophoretic forces making it highly effective in capturing the finer particulate matter even though the media has larger pores which is extremely useful in systems that are limited by underpowered fans for instance and where energy savings is important.
This choice of media is expensive when compared to other options and is therefore only selected when other options are not practical.
The media is produced from 100% continuous filaments of spun glass. The bio-soluble micro glass filter media is produced with a polyester spunbond backing for better stitching during pocket filter production.
The high loft filter media has definite advantage in dust holding capacity and very low resistance. This version of media was first developed in the 1940’s. Disposal costs in Europe together with higher manufacturing costs has limited the product growth globally but on a cost / performance basis micro glass outperforms most other filter media options
This proprietary technology ensures low resistance when considering static and dynamic differential pressure.
Intermediate hot melt separators ensure uniform pleat spacing and the ability to form a rigid self-supporting media pack. The media pack is permanently sealed to the filter frame using a solid polyurethane sealant.
MELTBLOWN FILTER MEDIA
PERFORMANCE DATA FOR MELTBLOWN POCKET FILTERS
MICROGLASS FILTER MEDIA
PERFORMANCE DATA FOR MICRO GLASS POCKET FILTERS
ELECTROSTATIC FILTER MEDIA
PERFORMANCE DATA FOR ELECTROSTATIC POCKET FILTERS
Filter efficiency values are certified according to EN ISO 16890-1:2016 test standards. The new ISO 16890 standard defines four new filter groups based on dust particle size.
- ISO Coarse (Efficiency testing of ISO A2 test dust)
- ISO PM10: particle size ≤ 10 μm
- ISO PM2.5: particle size ≤ 2.5 μm
- ISO PM1: particle size ≤ 1 μm
In the past filters were tested at 0.4-micron particles for classification. The new standard will test to PM1, PM2.5 and PM10. This test revision is of great help in selecting the best filter for a given environment and prevailing particulate matter concentration.
Ashrae dust is no longer used for efficiency and resistance. DEHS and KCI test aerosols are used instead, which are vital for generating and measuring fine particles found in atmospheric air.
The Eurovent classification system rates filters for energy efficiency. Air filters are graded from A+ to E. Grade A+ stands for the least energy consumption and E for the highest. This new classification has become the focus of attention as energy costs increased and demands for CO2 reduction became tougher.
EN ISO 16890-1:2016 BASED ON HUMAN HEALTH
Fine dust consists of the tiniest solid and liquid particles, which are grouped into different particle size fractions. Particles with a diameter of up to 10 μm (PM10) are called particulate matter. Particles of about 2.5 μm (PM2.5) are respirable. Particles that are smaller than 1μm (PM1) enter the alveoli and eventually the bloodstream.
Adverse health effects include irritation and inflammation of the mucous membranes, damage to the alveoli, and increased plaque build-up in the arteries. According to the WHO, long-term exposure to particulate matter (PM2.5) can lead to arteriosclerosis,
adverse birth outcomes and respiratory diseases in children. The German environment agency UBA estimates that 47,000 deaths a year are caused by particulate matter.
Sources of particulate matter are industrial combustion processes and vehicle emissions as well as traffic-generated dust from brake and tyre wear. It is mainly these primary particles that have a detrimental effect. In addition to these, the chemical reactions of gases in the air, such as ammonia (often from farms), sulphur dioxide and nitrogen oxides, can form the no less harmful secondary particles.