High Dust holding Capacity (HDC) materials
The HDC material is now called GreenWeave.
The ability of materials to carry dust is dependent on the
structure of their weave. High Dust Capacity materials (HDC) are
made of staple fibre yarns, i.e. yarns that are spun from 38
mm long thin fibres. The final yarn is made by twisting two yarns
into one yarn that is used both in warp and weft direction (length-
and crossways on fabric).
The result is a fabric that is able to carry a large amount
of dust without restricing the air flow through the material.
Such restriction would require washing of the textile duct to
ensure the distribution of the pre calculated quantity of air at
the pre calculated pressure loss.
KE Fibertec produces a variety of products according to the
relevant needs and type of installation. All low impulse systems
and hybrid high impulse systems are dimensioned using materials
with a high DHC, whereas we use materials with a lower DHC for very
active systems (more than 30% of air distributed through holes or
nozzles). The reason for this is that the dust particles in these
systems would not cause the same rise in pressure in the duct
as most of the dust just passes through the holes or
For the end user, the biggest problem with traditional ducting
systems is the maintenance and cleaning which can be very
inconvenient and expensive. Tests have proven that insufficiently
maintained ventilation systems is the major cause of poor quality
indoor air, frequently contributing significantly to sick building
syndrome. In the food industry the difficulty in maintaining
traditional ducting systems can lead to the provision of the ideal
conditions for the rapid growth of micro-organisms which is a
hazard to health.
With a KE Fibertec system, maintenance is not a problem since
the textile ducts are easily removed and refitted without the use
of any special tools. They can be washed and tumble dryed time and
time again without the risk of shrinkage. The problem of dirty and
unhygienic ducts is now solved once and for all. During operation
the KE-Low Impulse System® and KE-Interior
System® act as an additional and terminal filter before
the air is supplied to the room environment. The degree of this
filtration is equivalent to F5 to F6 standards.
Only The KE Fibertec group of companies utilise this market
of applications using HDC materials
See HDC table