The HDC material is now called GreenWeave.
The capability of the materials to carry dust is highly
dependent on the structure of the weave. High Dust Capacity
materials (HDC) are made of staple fiber yarns, i.e. yarns that are
spun of 1½" long thin fibers. The final yarn is made by
twisting two yarns into one yarn that is used both in warp and weft
direction (length- and crosswise of fabric).
The result is a fabric that is capable of carrying a large amount
of dust without blocking the air flow through the material. Such
blocking would require washing of the textile duct to ensure the
distribution of the calculated quantity of air at the calculated
KE Fibertec offers a variety of product types according to the
relevant needs and type of installation. All low impulse systems
and hybrid high impulse systems are basically dimensioned using
materials with a high DHC, whereas we use materials with a lower
DHC for very active systems (more than 30% of air through holes or
nozzles). The reason for this is that the dust particles in these
systems do not cause the same rise in pressure in the duct as most
of the dust just penetrates the holes or nozzles.
of applications using HDC materials
See HDC table