Hand
How the carpet feels to the touch. Factors determining
how the carpet feels include weight, stiffness, fibre type, dpf, density
and backing.
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Heather
A subtle multicoloured effect produced by commingling
yarns or spinning blended fibres of different colours together.
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Heatsetting
Process for stabilization and setting a memory of twist
in plied yarns. "Autoclave" treats skeins with pressurized steam in
a batch operation. "Superba"
uses conditions similar to the autoclave but it is a continuous process.
"Suessen" is a continuous dry
heatsetting method used most commonly for spun yarn heatsetting. (See
"Continuous heatsetting.")
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Heavy traffic
1,000 to 10,000 traffics per day or up to
2,000,000 for the life of the carpet. Could also include some directional,
nondirectional and rolling traffic, as well as tracked-in dirt. (See
"Foot traffic units.")
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Heddle
A frame of parallel wires (like needles)
through which warp yarns are threaded. The heddle is raised and lowered
to interlace face yarns.
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Hexamethylene diamine
A chemical compound with a chain of six
carbon atoms which is reacted with adipic acid to make Type 6,6 nylon.
It is a petrochemical.
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Hexapod drum test
An instrument to test pile floor coverings
to produce changes in appearance and colour due to changes in surface
structure by mechanical action. This accelerated test, primarily used
in Canada, provides a specific rating of the ability of the carpet to
withstand crushing and matting.
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Hollow filament fibres
Refers to filaments with interior voids.
Hollow core fibres improve the soil-hiding ability of nylon by diffusing
light passing through the fibre.
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Hybrid carpet
A carpet in which two or more different
yarn types are combined in the carpet construction.
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